Motor assembly and refrigeration appliance

Abstract

The embodiment of the utility model provides a kind of motor assembly and refrigeration equipment, wherein, motor assembly includes: motor body;Fire cover assembly, it is set to the outside of motor body, and fire cover assembly is equipped with accommodating cavity inside, at least part motor body is located in accommodating cavity;Wherein, on the axial direction of motor body, fire cover assembly covers the stator core of motor body, and on the radial direction of motor body, fire cover assembly covers the stator core of motor body.The technical scheme of the utility model in, on the axial direction and radial direction of motor body, stator core is formed continuous covering, from the source to block incandescent particle, arc spark and flame direct escape path, significantly improve the self-extinguishing ability of motor under abnormal working condition.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and more specifically, to a motor assembly and a refrigeration device. Background Technology

[0002] Currently, motors generate a lot of heat when running. The internal space of a motor is relatively enclosed. When the rate of heat generation is much less than the heat dissipation capacity, heat will accumulate. Once it reaches a certain level, the motor may crack, causing the electrical sparks generated inside the motor to come out and create a safety hazard. Utility Model Content

[0003] The present invention aims to at least solve the technical problem of the inability to effectively isolate motor fires in existing or related technologies.

[0004] In view of this, an embodiment of the present invention provides a motor assembly.

[0005] An embodiment of this utility model provides a refrigeration device.

[0006] To achieve the above objectives, embodiments of the present invention provide a motor assembly, comprising: a motor body; and a fireproof cover assembly fitted onto the motor body, wherein the fireproof cover assembly has a receiving cavity, and at least a portion of the motor body is disposed within the receiving cavity; wherein, in the axial direction of the motor body, the fireproof cover assembly covers the stator core of the motor body, and in the radial direction of the motor body, the fireproof cover assembly covers the stator core of the motor body.

[0007] According to the motor assembly proposed in this utility model, by using a fireproof cover assembly fitted onto the motor body, the stator core is continuously covered in the axial and radial directions of the motor body, thereby blocking the direct escape path of hot particles, electric arc sparks and flames from the source, and significantly improving the motor's self-flame suppression capability under abnormal operating conditions.

[0008] The gap channel formed by the containment cavity between the fireproof cover assembly and the motor body can quickly absorb and diffuse the heat of the flame and hot gas, reducing the temperature and speed before reaching the outside, thus playing the role of heat insulation buffer and energy dissipation.

[0009] It is important to emphasize that the sleeve-type enclosure covers the stator core both radially and axially, which not only improves the fire-retardant integrity but also provides secondary protection against splashes, impacts, and foreign object intrusion for the stator core and surrounding areas, indirectly enhancing the overall environmental adaptability and reliability of the machine. The axial and radial coverage work together to form a three-dimensional envelope around the stator core, avoiding the short channels caused by unidirectional shielding, extending the propagation path of flames and hot gases, and improving suppression efficiency.

[0010] In some technical solutions, optionally, the fireproof cover assembly includes at least two detachably connected fireproof components, and the interior of the at least two fireproof components is provided with a receiving cavity after they are connected.

[0011] In this solution, the fireproof cover assembly is designed as two or more detachable fireproof components, achieving a segmented structure for the cover. This enhances the flexibility of assembly, maintenance, and replacement, while reducing maintenance costs and downtime. The modular segmented design facilitates manufacturing, transportation, and maintenance; the connection method ensures a robust and detachable structure, improving assembly and maintenance convenience; the connected components form a continuous cavity, achieving complete axial and radial coverage of the motor stator core, ensuring fire-resistant performance; and the multiple fireproof components work together to maximize the overall fire barrier's effectiveness.

[0012] In some technical solutions, optionally, the motor body is provided with a wire outlet terminal, and the motor assembly also includes a wire outlet hole, which is provided on the side wall of the fireproof cover assembly, and the wire outlet hole is arranged opposite to the wire outlet terminal.

[0013] In this technical solution, by setting the outlet hole on the side wall of the cover and opposite to the outlet terminal, the wire path is optimized, mechanical stress is reduced, and assembly is facilitated; the fire resistance continuity of the fireproof cover assembly is taken into account, ensuring that the cover completely covers the stator core axially and radially except for the outlet hole; space and foundation are provided for designing special fireproof and sealing measures at the outlet hole to ensure overall fire safety performance.

[0014] In some technical solutions, optionally, one of the two adjacent fireproof components has a wire outlet protrusion on its side wall and the other has a wire outlet groove on its side wall, with the wire outlet protrusion extending axially along the motor body; wherein, when the two adjacent fireproof components are connected, a wire outlet hole is formed between the wire outlet protrusion and the wire outlet groove.

[0015] In this design, the outlet hole is formed by two fireproof components through a three-dimensional fit between a protrusion and a groove, avoiding structural weakening caused by a large opening in a single fireproof component; the axially extending protrusion design provides a smooth and protected path for the wire, reducing the risk of mechanical damage to the wire; the fit between the protrusion and the groove enhances the structural rigidity and sealing of the connection, improving the overall fire-resistant performance of the fireproof cover assembly; the channel formed by the outlet hole extends the flame propagation path, reducing the direct escape of flames and hot particles, and improving the safety of the motor assembly.

[0016] In some technical solutions, optionally, the distance between the wire outlet protrusion and the wire outlet groove in the circumferential direction of the motor body is no more than 1mm.

[0017] In this technical solution, extremely high flame-retardant sealing can be provided at the connection of the outlet hole, effectively preventing circumferential leakage of flames and hot particles; high stability and durability of mechanical connection reduces the impact of vibration and thermal deformation on the connection; extended flame-retardant path and improved heat exchange efficiency enhance the overall safety performance of the fireproof cover assembly; suitable for filling with auxiliary sealing materials to further improve the flame-retardant and sealing effect at the interface.

[0018] In some technical solutions, optionally, there are two fireproof components, with the motor body connected to the inner wall of one of the fireproof components, and the motor shaft of the motor body passing through the other fireproof component.

[0019] In this technical solution, the motor body is connected to the inner wall of one of the fireproof components, ensuring a stable connection between the motor and the fireproof cover assembly, thereby improving mechanical strength and the overall rigidity of the fireproof cover. The other fireproof component is designed with an axial through hole, allowing the motor shaft to pass through and ensuring normal rotational transmission of the motor shaft. At the same time, the fireproof component provides necessary fire resistance and structural protection for the shaft area.

[0020] In some technical solutions, the motor assembly may optionally include: multiple connecting lugs extending outward from the outer peripheral wall of the fireproof component along the radial direction of the motor body, and the connecting lugs are provided with fittings; wherein, two adjacent fireproof components are connected by fittings.

[0021] In this technical solution, connecting lugs provide external mechanical connection points for fireproof components, thereby enhancing the mechanical connection strength and stability between fireproof components.

[0022] In some technical solutions, optionally, multiple connecting lugs are evenly arranged at the center of the center of the wire outlet hole of the fireproof cover assembly in the circumferential direction of the motor body.

[0023] In this design, the connecting lugs and cable outlets of the fireproof cover assembly are evenly distributed circumferentially to ensure balanced stress distribution on the cover structure, reduce local stress concentration, and improve overall mechanical rigidity and durability. The evenly distributed connecting lugs and cable outlets provide clear reference and positioning benchmarks for assembly, simplifying the assembly process, facilitating rapid positioning and installation, and improving assembly efficiency and maintenance convenience. The evenly distributed cable outlets, combined with the even layout of the connecting lugs, effectively disperse the impact of the openings on the cover structure, ensuring the fire-resistant performance and structural integrity of the fireproof cover assembly.

[0024] In some technical solutions, optionally, the motor body includes a plurality of connecting protrusions extending radially outward, and in the circumferential direction of the motor body, a connecting lug is provided between any two connecting protrusions, and a connecting protrusion is provided between any two connecting lugs.

[0025] In this design, the connecting protrusions and connecting lugs are evenly distributed alternately in the circumferential direction, forming an interlocking and balanced connection structure system. This ensures that the connecting protrusions on the motor body and the connecting lugs on the fireproof components correspond to each other and are arranged in an alternating pattern, guaranteeing a uniform distribution and balanced force at the connection points, thereby improving the overall connection strength and the mechanical rigidity of the enclosure. The alternating connecting protrusions and connecting lugs serve as positioning and fastening structures, ensuring accurate alignment between the motor body and the fireproof components, reducing assembly errors, and improving assembly efficiency and the sealing of the connection.

[0026] An embodiment of this utility model provides a refrigeration device, including the aforementioned motor assembly.

[0027] This refrigeration equipment uses the aforementioned motor assembly as its core drive. By utilizing the fireproof cover assembly and related structural features within the motor assembly, the refrigeration equipment achieves high safety and fire-retardant performance during operation.

[0028] The refrigeration equipment includes the aforementioned motor assembly. Since the refrigeration equipment includes any of the aforementioned motor assemblies, it has the beneficial effects of any of the aforementioned motor assemblies, which will not be elaborated here.

[0029] Additional aspects and advantages of this invention will become apparent in the description that follows, or may be learned by practice of this invention. Attached Figure Description

[0030] Figure 1 A schematic diagram of the structure of a motor assembly according to an embodiment of the present invention is shown;

[0031] Figure 2 A schematic diagram of the structure of a motor assembly according to an embodiment of the present invention is shown;

[0032] Figure 3 A schematic diagram of the structure of a motor assembly according to an embodiment of the present invention is shown;

[0033] Figure 4 A structural schematic diagram of a fireproof component according to an embodiment of the present invention is shown;

[0034] Figure 5 A structural schematic diagram of a fireproof component according to an embodiment of the present invention is shown;

[0035] Figure 6 A schematic diagram of the structure of a motor assembly according to an embodiment of the present invention is shown;

[0036] Figure 7 A schematic diagram of a refrigeration device according to an embodiment of the present invention is shown.

[0037] Wherein, 1: motor assembly; 11: fireproof cover assembly; 111: fireproof component; 112: receiving cavity; 113: cable outlet hole; 1141: cable outlet protrusion; 1142: cable outlet groove; 12: motor body; 121: stator core; 122: cable outlet terminal; 123: motor shaft; 124: connecting lug; 125: assembly; 126: connecting protrusion;

[0038] 2: Refrigeration equipment. Detailed Implementation

[0039] To better understand the above-mentioned objectives, features, and advantages of the embodiments of this utility model, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0040] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, embodiments of the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0041] In related technologies, motors generate a large amount of heat during operation, which may cause combustibles or electrical sparks to escape from the motor, posing a safety hazard. Although the BMC material of the motor stator has certain flame-retardant properties, it is still at risk of cracking at high temperatures, which could lead to the escape of internal combustibles or electrical sparks.

[0042] The following reference Figures 1 to 7 Some embodiments according to the present invention are described.

[0043] like Figure 1 and Figure 2 As shown, this embodiment provides a motor assembly 1. By using a fireproof cover assembly 11 fitted outside the motor body 12, the stator core 121 is continuously covered in the axial and radial directions of the motor body 12, thus blocking the direct escape path of hot particles, electric arc sparks and flames from the source, significantly improving the motor's self-flame suppression capability under abnormal operating conditions.

[0044] Among them, such as Figure 6 As shown, the gap channel formed by the receiving cavity 112 between the fireproof cover assembly 11 and the motor body 12 can quickly absorb and diffuse the heat of the flame and hot gas, reducing the temperature and speed before reaching the outside, and playing the role of heat insulation buffer and energy dissipation.

[0045] It is important to emphasize that the sleeve-type enclosure covers the stator core 121 both radially and axially, which not only improves the fire-retardant integrity but also provides secondary protection against splashes, impacts, and foreign object intrusion for the stator core 121 and its surrounding areas, indirectly enhancing the overall environmental adaptability and reliability of the machine. The axial and radial coverage work together to form a three-dimensional envelope around the stator core 121, avoiding the short channels caused by unidirectional shielding, extending the propagation path of flames and hot gases, and improving suppression efficiency.

[0046] Specifically, the motor assembly 1 consists of a motor body 12 and a fireproof cover assembly 11. The fireproof cover assembly 11 and the motor body 12 are in a combination relationship of being fitted and being fitted. The geometric fit of the cover itself enables the two to form a stable relative position after assembly.

[0047] The fireproof cover assembly 11 surrounds the outside of the motor body 12, and optionally, the two are arranged coaxially or substantially coaxially. The fireproof function is coupled with the motor body 12 in a component-level integrated manner, unifying the design boundaries, assembly benchmarks and coverage, reducing exposed gaps and discontinuities, improving the overall fire resistance continuity and consistency, and reducing the impact of modification difficulty and assembly tolerance on the protective effect.

[0048] The motor body 12, as the core component for power and heat generation, includes structures such as the stator core 121. The motor body 12 is externally fitted by the fireproof cover assembly 11, with at least a portion of the motor body 12 housed within the receiving cavity 112. The motor body 12 is located within the internal space and envelope of the fireproof cover assembly 11. By clearly defining the protected object and the heat source, protective resources, such as cover wall thickness, gaps, and path length, can be preferentially allocated to the area where the stator core 121 is located, thereby improving protection efficiency.

[0049] The fireproof cover assembly 11, as a single integral cover component, is fitted over the motor body 12, and has a receiving cavity 112 inside. Through this fitted relationship, it forms a circumferentially continuous outer cover with the motor body 12; the receiving cavity 112 defines the relative position and minimum gap between the cover and the motor body 12. The fireproof cover assembly 11 surrounds the outer periphery of the motor body 12 and spans the axial length of the motor body 12, covering the stator core 121 in both the radial and axial directions.

[0050] A continuous circumferential shell surrounds the flame, blocking the shortest possible escape path for hot particles. The length and bends of the cavity between the enclosure and the motor body 12 lengthen the flame propagation path, enhance turbulence and heat transfer, and significantly reduce the flame propagation speed and temperature. It provides physical isolation from external splashes, dust, and liquids, reducing the probability of foreign objects entering the motor body 12.

[0051] The fireproof cover assembly 11 is fitted around the motor body 12, forming a stable and uniform circumferential support by surrounding the motor body 12 in a surface contact or near-enveloping manner. This eliminates reliance on single-point suspension, resulting in more balanced stress and thermal deformation. The continuous circumferential coverage eliminates the nozzle effect and direct flame jetting caused by localized openings. Stable relative positions are achieved without complex alignment mechanisms, improving consistency.

[0052] The interior of the fireproof cover assembly 11 forms a space, namely a receiving cavity 112, for housing the motor body 12. The wall of the receiving cavity 112 faces the outer surface of the motor body 12, forming a controlled gap and path between them. The receiving cavity 112 surrounds the motor body 12 radially and covers the critical length segment of the motor body 12 axially.

[0053] The containment cavity 112 serves as a buffer volume for air and hot gas. Here, the hot gas mass exchanges heat with the cold wall and mixes turbulently, rapidly weakening the flame intensity. Compared to an unshielded or point-like shielding, the envelope defined by the containment cavity 112 forms a longer and more complex propagation path, improving flame-stopping reliability. The containment cavity 112 provides clearance for the thermal expansion of the motor body 12 and the enclosure, reducing the risk of thermal jamming and deformation interference.

[0054] Part or all of the motor body 12 is housed within the receiving cavity 112. This is understood not to be a rigid constraint along its entire length, but rather to ensure that critical components are contained within the cavity. This allows the enclosure to adapt to motor bodies 12 of different lengths and structures while still maintaining effective coverage of the core hazardous area. At least the axial section containing the stator core 121 is located within the receiving cavity 112 and is radially surrounded by the cavity walls.

[0055] The fireproof shield assembly 11 ensures effective coverage of the highest-risk stator core 121 area, maintaining its core fireproof performance regardless of variations in the motor body 12's dimensions or accessories. Along the motor shaft 123, the shield's coverage length extends across the axial range of the stator core 121. The axial coverage section of the fireproof shield assembly 11 establishes a shielding relationship with the axial end of the stator core 121, blocking direct leakage along the axial direction. The fireproof shield assembly 11 axially covers at least the end face area of ​​the stator core 121, forming an envelope around its corresponding outer surface. This cuts off the jet path along the axial direction, suppressing the straight-line escape of flames and incandescent particles from near the end face. The channel formed by the axial coverage section enhances convection and heat transfer with the inner wall of the shield, reducing flame temperature. It also shields the end of the stator core 121 and its adjacent areas, reducing the impact of abnormal ignition near the end face on the external environment.

[0056] In the radial direction of the motor, the circumferential wall of the enclosure covers the outer circle of the stator core 121. The radial covering section forms a circumferential enclosure with the outer circle of the motor body 12, defining the radial gap and forming a closed loop. The inner wall of the enclosure is radially outside the outer circle of the stator core 121, continuously distributed along the entire circumference, preventing flames, hot particles, and high-temperature gas masses from being radially ejected from the outer circle region of the stator core 121. The circumferential loop extends the airflow in the circumferential direction, dispersing and reducing both velocity and temperature, and causing hot particles to attenuate their energy after multiple collisions with the wall.

[0057] The dual axial and radial coverage reduces the effective cross-sectional area of ​​potential leaks while lengthening the propagation path, significantly improving flame arrest tolerance and stability. The radial annular channel disperses the airflow, while the axial channel enhances cooling; the combined effect reduces flame temperature, velocity, and the conditions for the formation of combustible mixtures.

[0058] In the event of abnormal heating, sparks, or hot particles from the internal wiring of the motor, the fireproof cover assembly 11 can provide initial isolation and cooling at the outermost boundary, preventing flame escape and secondary risks. The sleeve-type cover reduces the direct impact of dust, oil mist, and liquids on the stator core 121, improving long-term operational reliability.

[0059] Optionally, by reasonably controlling the axial and radial clearances of the receiving cavity 112, both assembly tolerance and fire-retardant performance can be considered; the more uniform the clearance, the more stable the fire-retardant effect. The covering provided by the fireproof cover assembly 11 will change the heat dissipation path. The thermal conductivity, temperature resistance, and flame-retardant properties of the materials should be comprehensively considered without affecting the coverage of the stator core 121 to ensure long-term reliability.

[0060] In some embodiments, the fireproof cover assembly 11 may be designed as two or more detachably connected fireproof components 111 to achieve a segmented structure of the cover, improve the flexibility of assembly, maintenance and replacement, and reduce maintenance costs and downtime.

[0061] Although the fireproof cover assembly 11 is composed of multiple fireproof components 111, at least two fireproof components 111 are connected and have an internal receiving cavity 112, ensuring that the overall structure after connection forms a complete receiving cavity 112, thereby achieving full coverage of the stator core 121 of the motor body 12 and ensuring that the fire-resistant and heat-insulating effects are not affected by the segmented structure.

[0062] The detachable fireproof component 111, through a reasonably designed connection method, such as screws, rivets, and clips, ensures a tight fit at the connection point. The internal cavity 112 is continuous and has no obvious leakage channels, preventing flames or hot particles from escaping from the interface.

[0063] The fireproof cover assembly 11 is composed of multiple independent fireproof components 111, which are fixed to each other by a detachable connection to form an integral structure. The multiple fireproof components 111 are distributed around the motor body 12 and, after being connected, together enclose a complete receiving cavity 112.

[0064] Understandably, the reduced size of the fireproof component 111 facilitates manufacturing process control and transportation, thereby lowering production and logistics costs. The quantity and shape of the fireproof component 111 can be adjusted according to the specific size and structure of the motor to adapt to diverse application scenarios. Damaged or worn fireproof components 111 can be disassembled individually without disassembling the entire casing, shortening maintenance time. The segmented structure allows for moderate sliding or deformation between segments during thermal expansion, reducing thermal stress concentration and increasing structural lifespan.

[0065] Fireproof components 111 are connected and disassembled using screws, rivets, clips, or similar mechanical fasteners. Connectors secure the relative positions of the fireproof components 111, ensuring a tight seal and structural robustness. Connectors are positioned on the flanges, lugs, or dedicated connection faces of the fireproof components 111, ensuring a tight fit and forming a seamless connection interface.

[0066] Mechanical fasteners ensure the connection is resistant to vibration and impact, preventing leaks caused by loose connections. Optionally, flame-retardant gaskets or coatings can be applied to the connection to further reduce the risk of flames and hot particles escaping from the interface. The detachable connection facilitates quick on-site assembly and disassembly, meeting maintenance and replacement needs, and also allows for fine-tuning of the relative position of the fireproof component 111 during assembly, ensuring that the dimensions and shape of the receiving cavity 112 meet design requirements.

[0067] The connected fireproof components 111 form a continuous internal space, namely the receiving cavity 112. The connecting surfaces between the fireproof components 111 are tightly sealed, and the receiving cavity 112 has no obvious damage or interruption of continuity. The receiving cavity 112 is located inside the fireproof components 111, surrounding the stator core 121 of the motor body 12, forming a complete enclosed space. The receiving cavity 112 ensures that the stator core 121 of the motor body 12 is at least partially located within it, achieving continuous axial and radial coverage. The receiving cavity 112 serves as a buffer space for flames and incandescent particles, extending the flame propagation path and reducing the flame temperature and velocity. The air or filling material inside the receiving cavity 112 can absorb and dissipate heat energy, protecting the motor body 12 from direct impact from high temperatures. The connected receiving cavity 112 demonstrates the overall fire-resistant effect of multiple fireproof components 111 working together, avoiding structural weaknesses caused by segmentation.

[0068] It is understandable that when multiple fireproof components 111 are designed in segments, the size, shape, and connection surface design of each fireproof component 111 must be matched, especially ensuring a tight fit at the connection surfaces to ensure that the receiving cavity 112 is continuous and leak-free after connection. The placement of the connectors must take into account the mechanical strength and disassembly of the fireproof components 111, while avoiding affecting the continuity of the inner wall of the enclosure, ensuring the integrity and fire-resistant performance of the receiving cavity 112. The size and shape of the receiving cavity 112 after connection must closely surround the stator core 121 of the motor body 12, ensuring coverage in both the axial and radial directions, and avoiding dead angles or gaps in the wiring.

[0069] In summary, this solution enables modular segmented design, facilitating manufacturing, transportation, and maintenance; the connection method ensures a robust and detachable structure, enhancing assembly and repair convenience; the connection forms a continuous accommodating cavity 112, achieving complete axial and radial coverage of the motor stator core 121, ensuring fire-resistant performance; multiple fireproof components 111 work together to maximize the overall fire barrier's effectiveness.

[0070] In some embodiments, the motor body 12 is optionally provided with a terminal 122 as an interface for electrical signal or power output, which must be connected to the outside world through the fireproof cover assembly 11. By providing a terminal hole 113 on the side wall of the fireproof cover assembly 11, and the terminal hole 113 being arranged opposite to the terminal 122, electrical connection is achieved while taking into account the overall fire-resistant performance and structural integrity of the fireproof cover.

[0071] The outlet hole 113 is a necessary opening, but its position and size are reasonably designed to ensure that it does not weaken the axial and radial coverage effect of the fireproof cover assembly 11 on the motor stator core 121, and to minimize the risk of flame or hot particle leakage caused by the opening. The side wall hole design is simple and clear, which facilitates the manufacturing and processing of the fireproof cover assembly 11. Furthermore, the outlet hole 113 is positioned opposite to the outlet terminal 122 to ensure the shortest possible lead-in channel, reducing wire bending stress and installation complexity.

[0072] The motor body 12 is equipped with electrical output terminals 122 at its end or side, serving as electrical output interfaces for the motor windings. The output terminals 122 are electrically connected to the interior of the motor windings, providing power or signals to the outside. The output terminals 122 are typically located on one side or end face of the motor body 12, with a clearly defined spatial position and installation orientation.

[0073] Terminal 122 provides the output interface for the motor's operating current and is an essential component for the motor's functionality. Furthermore, it provides a spatial reference for the location of the outlet hole 113 in the fireproof cover assembly 11, ensuring alignment between the cover opening and the terminal. The area around terminal 122 is a weak point in the electrical connection and external pathway, requiring focused protection through the fireproof cover design.

[0074] The side wall of the fireproof cover assembly 11, i.e., the radial wall surface of the cover, has through holes of a size and shape adapted to the wires or terminals passing through. The wire outlet hole 113 forms an open passage with the overall structure of the fireproof cover assembly 11, connecting the internal motor wire outlet terminal 122 to the external electrical interface. The wire outlet hole 113 is located at a specific position on the side wall of the fireproof cover assembly 11, opposite to the motor body 12 wire outlet terminal 122. That is, the position of the wire outlet hole 113 on the side wall of the cover corresponds to the space where the motor body 12 terminal is located, ensuring that the electrical leads of the motor windings can smoothly pass through the fireproof cover assembly 11 to achieve electrical connection.

[0075] The outlet hole 113 is positioned opposite the outlet terminal 122 to reduce wire bending and stress concentration, thereby improving wire life and ease of assembly. As an opening in the cover, the outlet hole 113 may cause a reduction in local structural strength and fire resistance, which needs to be compensated for by rationally designing the hole size, edge structure, or adding additional fireproofing measures (such as staggered fireproof wall wrapping or sealing material filling). Despite the outlet hole 113, the fireproof cover assembly 11 must still ensure complete axial and radial coverage of the stator core 121 by the remaining parts to avoid creating a direct channel for the leakage of flames or hot particles.

[0076] The position of the outlet hole 113 on the side wall of the fireproof cover assembly 11 corresponds spatially to the outlet terminal 122 of the motor body 12. Their spatial alignment forms a straight or near-straight path for the wire to pass through the cover from the motor body 12. The outlet hole 113 radially corresponds to the position of the outlet terminal 122, and maintains proper alignment in both the axial and circumferential directions to prevent wire bending.

[0077] Reducing the bending of the wires between the outlet hole 113 and the terminal lowers the risk of mechanical stress and wear. The alignment design simplifies electrical connection procedures, improving assembly efficiency and quality. Proper alignment allows for the design of a special fire-resistant structure for the fireproof cover assembly 11 at the outlet hole 113, such as staggered wrapping of the fireproof wall on the outlet side, ensuring fire-resistant continuity at the opening.

[0078] It is understandable that, based on the axial and radial coverage of the stator core 121, the fireproof cover assembly 11 achieves the necessary electrical path by setting the outlet hole 113 on the side wall and setting it opposite to the outlet terminal 122. At the same time, by reasonably designing the hole diameter, hole position and surrounding fireproof structure, the impact on the fire resistance continuity of the cover is minimized.

[0079] If the fireproof cover assembly 11 is composed of multiple detachable fireproof components 111, the cable outlet 113 is usually located on the side wall of a certain fireproof component 111. When connecting, it is necessary to ensure that the opening is accurately aligned with the terminal of the motor body 12 and that the connection surface is well sealed to avoid flame leakage at the interface.

[0080] The setting of the outlet hole 113 needs to take into account the size, position and wire routing of the motor body 12 terminals to ensure that the wires can pass through smoothly and will not affect the integrity of the receiving cavity 112 and the fire-resistant effect.

[0081] In summary, this solution optimizes the wire path, reduces mechanical stress, and facilitates assembly by setting the outlet hole 113 on the side wall of the cover and opposite the outlet terminal 122; it also takes into account the fire-resistant continuity of the fireproof cover assembly 11, ensuring that the cover completely covers the stator core 121 axially and radially except for the outlet hole 113; and it provides space and a basis for designing special fireproof and sealing measures at the outlet hole 113, ensuring overall fire safety performance.

[0082] In some embodiments, optionally, such as Figure 3 , Figure 4 and Figure 5 As shown, by utilizing the combination relationship of two adjacent fireproof components 111, a wire outlet hole 113 is formed between the wire outlet protrusion 1141 and the wire outlet groove 1142 after connection, realizing the integrated design of the wire outlet hole 113 structure of the fireproof cover assembly 11, avoiding the structural weakening and fire resistance performance reduction caused by the large opening of a single fireproof component 111.

[0083] The wire outlet protrusion 1141 extends along the axial direction of the motor body 12, forming an axial wire outlet channel, which helps guide the wire to pass through smoothly. At the same time, it effectively utilizes the axial dimension of the fireproof component 111 to avoid the formation of a short and straight leakage path at the opening, thereby improving the fire-resistant performance.

[0084] The combination of protrusions and grooves enhances the rigidity and stability of the structure surrounding the cable outlet 113, reduces the risk of cracking due to stress concentration at the connection, and facilitates the installation of flame-retardant sealing materials, thereby improving the fire-retardant and sealing effect at the interface.

[0085] The side wall of the fireproof component 111 is designed with a protruding structure extending along the direction of the motor shaft 123, which serves as an interface component and corresponds to and mates with the groove of the adjacent fireproof component 111. The protrusion is located at a specific position on the side wall of the fireproof component 111, extends axially, and forms a mating surface with the groove of the adjacent component.

[0086] The protrusion, as the protruding part of the outlet hole 113, together with the groove, defines the spatial shape of the outlet hole 113. The axially extending protrusion provides a smooth guiding path for the wire, preventing bending and mechanical damage. The protruding structure increases the connection surface area, enhances the mechanical interlocking force between the fire-resistant components 111, and improves the overall structural stability. The three-dimensional channel formed by the protrusion and groove is more complex than a simple opening, extending the flame propagation path and reducing the risk of direct flame jetting.

[0087] The sidewalls of adjacent fireproof components 111 are designed with grooves corresponding to the protrusions. The grooves and protrusions cooperate to form an interlocking structure. The grooves are positioned to correspond to the protrusions and extend axially, ensuring that the two fireproof components 111 form a complete passage after connection. The grooves and protrusions together define the shape and size of the outlet hole 113, ensuring that the hole diameter meets the requirements of the wire. The grooves provide positioning and containment space for the protrusions, ensuring no obvious gaps after connection and improving sealing. The groove structure helps prevent relative slippage between fireproof components 111, improving the overall rigidity of the assembly.

[0088] The shape of the groove makes the outlet hole 113 a non-straight channel, which is beneficial for fire resistance and heat insulation.

[0089] The protrusion is shaped as a raised strip or rib extending axially. The protrusion and groove form a continuous channel in the axial direction. The axial extension of the protrusion covers the wire path from the motor body 12's output terminal 122 to the outside of the housing. The axially extending protrusion provides a smooth and protected path for the wires, reducing bending and mechanical wear. The axial extension increases the path length for the propagation of flames and hot gases, reducing temperature and velocity, and enhancing the flame-retardant effect. The extension of the protrusion helps to disperse localized stress and prevent structural weakening in the opening area.

[0090] The outlet hole 113 is the space defined by the protrusion and the groove after connection. The two fireproof components 111 are connected by the cooperation of the protrusion and the groove to form a stable structural interface, and the outlet hole 113 serves as a functional opening at the connection between the two components.

[0091] The outlet hole 113 is located between the connecting surfaces of the two fireproof components 111, with continuous space and dimensions adapted to the lead wire of the motor outlet terminal 122. This eliminates the need for large openings in individual components, reducing manufacturing complexity and the risk of structural weakening. The interlocking fit between the protrusions and grooves ensures a tight connection, reducing leakage of flames and hot particles from the interface. The size and shape of the outlet hole 113 can be precisely designed according to the wire specifications, ensuring smooth wire passage. The three-dimensional fit creates a non-straight-through outlet hole 113 with a protective structure, enhancing the overall safety of the fire-resistant cover.

[0092] It is understandable that the outlet hole 113 is formed by the cooperation of the protrusions and grooves of the two fireproof components 111, ensuring that the segmented structure of the fireproof cover assembly 11 meets the modular assembly requirements and realizes the functionality and fire-resistant performance of the outlet hole 113.

[0093] The axial extension lengths of the protrusion and the groove must match to ensure that a continuous and smooth passage of wire outlet 113 is formed after connection, avoiding wire jamming and mechanical damage.

[0094] Flame-retardant sealing materials or coatings can be applied to the joint surfaces of the protrusions and grooves to improve the sealing performance of the interface and prevent flames, smoke and hot particles from leaking through the joint gaps.

[0095] In summary, in this design, the outlet hole 113 is formed by two fireproof components 111 through a three-dimensional fit between the protrusion and the groove, avoiding the structural weakening caused by a large opening in a single fireproof component 111; the axially extending protrusion design provides a smooth and protected passage for the wire, reducing the risk of mechanical damage to the wire; the fit between the protrusion and the groove enhances the structural rigidity and sealing of the connection, improving the overall fire-resistant performance of the fireproof cover assembly 11; the channel formed by the outlet hole 113 extends the flame propagation path, reduces the direct escape of flames and hot particles, and improves the safety of the motor assembly 1.

[0096] In some embodiments, optionally, by controlling the circumferential distance between the outlet protrusion 1141 and the outlet groove 1142 to be no more than 1 mm, an extremely small circumferential gap is achieved at the outlet hole 113, significantly improving the fire-retardant sealing performance at the connection and preventing the leakage of flames, hot particles, and high-temperature gases along the circumference. The small-pitch design allows the protrusion and groove to fit tightly, enhancing the mechanical interlocking force and overall rigidity at the connection of the two fireproof components 111, and reducing the risk of loosening due to vibration or thermal expansion. The tiny gap forms a narrow channel, extending the propagation path of flames and hot air, improving flame cooling and energy dissipation effects, and enhancing the overall safety of the fireproof cover assembly 11.

[0097] The restricted flow of hot air within the narrow channel promotes heat conduction and radiation to the metal wall of the fireproof component 111, reducing flame temperature. The small spacing increases the friction and mechanical engagement between the protrusions and grooves, enhancing connection stability and preventing loosening due to thermal expansion or vibration. The labyrinthine pathways formed by the narrow spacing increase the flame propagation path length, improving fire-stopping efficiency.

[0098] Optionally, the above spacing is suitable for filling with auxiliary materials such as flame-retardant sealant and high-temperature resistant sealing strips to further improve sealing and fire-retardant performance.

[0099] In summary, this solution provides extremely high fire-retardant sealing at the connection of the outlet hole 113, effectively preventing circumferential leakage of flames and hot particles; high stability and durability at the mechanical connection reduce the impact of vibration and thermal deformation on the connection; extended fire-retardant path and improved heat exchange efficiency enhance the overall safety performance of the fireproof cover assembly 11; and it is suitable for filling with auxiliary sealing materials to further improve the fire-retardant and sealing effect at the interface.

[0100] In some embodiments, optionally, the motor body 12 is connected to the inner wall of one of the fireproof components 111 to ensure a stable connection between the motor and the fireproof cover assembly 11, thereby improving mechanical strength and the overall rigidity of the fireproof cover. The other fireproof component 111 is designed with an axial through hole, allowing the motor shaft 123 to pass through, ensuring the normal rotational transmission of the motor shaft 123, while the fireproof component 111 provides necessary fire resistance and structural protection for the shaft portion.

[0101] The fireproof cover assembly 11 consists of two independent fireproof components 111, each performing different functions and positions. The two fireproof components 111 are detachably connected to form the overall fireproof cover assembly 11. The two fireproof components 111 are located at both ends of the motor body 12 or at appropriate positions, respectively, to achieve axial and radial coverage of the motor body 12.

[0102] One component secures the motor body 12, while the other allows the shaft to pass through, meeting both mechanical transmission and fire protection requirements. This modular design facilitates the assembly and maintenance of the motor body 12, reducing the difficulty of overall disassembly.

[0103] The motor body 12 is connected to the inner wall of a fireproof component 111 by means of mechanical fastening, welding, or bonding. The motor body 12 and the inner wall of the fireproof component 111 form a fixed connection to ensure relative positional stability. The fireproof component 111 covers at least a portion of the axial and radial areas of the motor body 12, and its inner wall is in close contact with the outer surface of the motor body 12.

[0104] The fireproof component 111 serves as a supporting structure for the motor body 12, enhancing overall rigidity and vibration resistance. The tight connection between the motor body 12 and the fireproof component 111 reduces interface gaps and prevents leakage of flames and hot particles along the connection surface. Good contact at the connection facilitates heat conduction to the fireproof component 111, improving flame cooling efficiency. The inner wall of the fireproof component 111 serves as a positioning reference for the motor body 12, improving assembly accuracy.

[0105] Another fireproof component 111 has an axial through hole for the motor shaft 123 to pass through. The other fireproof component 111 is not fixedly connected to the motor body 12, allowing the motor shaft 123 to rotate freely through it. The other fireproof component 111 is located outside the shaft of the motor body 12, and its shaft hole is coaxially aligned with the motor shaft 123.

[0106] The shaft hole ensures the normal rotational movement and power output of the motor shaft 123. A fireproof component 111 surrounds the shaft hole, limiting the axial leakage of flames and hot particles while providing mechanical protection for the shaft. The shaft hole can be fitted with seals or bearings to prevent external dust from entering, while also improving the fire-retardant and heat-insulating effect. The fireproof component 111 is rationally designed around the shaft hole, ensuring the stability of the cover structure and not affecting the rotation of the shaft.

[0107] One fireproof component 111 is connected to the motor body 12 through the inner wall to ensure positioning and fixation; the other fireproof component 111 has a shaft hole to ensure the free rotation of the shaft. The two components work together to achieve both mechanical fixation and rotational function. The two fireproof components 111 cover different axial areas of the motor body 12 to form a continuous fireproof cover structure, while reserving shaft hole passages to ensure that the overall fireproof performance and mechanical function are both taken into account.

[0108] Flame-retardant sealing material can be installed at the interface of the fireproof component 111 and around the shaft hole to ensure the fire-retardant sealing of the connection and the shaft hole area.

[0109] In summary, the modular design of the dual fireproof component 111 structure simplifies the manufacturing and assembly process; the fixed connection between the motor body 12 and the inner wall of the fireproof component 111 improves the overall mechanical stability and the tightness of the fire barrier; the other fireproof component 111 is provided with an axial through hole to ensure the normal penetration and rotational transmission of the motor shaft 123; the structural design takes into account both motor function and fire safety, ensuring the reliable operation and safety protection of the motor assembly 1.

[0110] In some embodiments, optionally, the connecting lug 124 provides an external mechanical connection point for the fireproof component 111, thereby enhancing the mechanical connection strength and stability between the fireproof components 111.

[0111] The connecting lug 124 is equipped with an accessory 125. The accessory 125 (such as a screw, rivet, nut, etc.) serves as a fastening element, enabling a detachable connection between the fireproof components 111, ensuring a secure connection and facilitating maintenance and replacement. Two adjacent fireproof components 111 are connected by the accessory 125. Through the combination of the connecting lug 124 and the accessory 125, the fireproof component 111 module can be quickly assembled and disassembled, improving the assembly efficiency and maintenance convenience of the overall motor assembly 1.

[0112] The connecting lug 124 serves as the mechanical connection part of the fireproof component 111, supports the assembly 125, and achieves a fixed connection with the adjacent fireproof component 111. The connecting lugs 124 are evenly or as designed distributed on the circumferential direction of the outer peripheral wall of the fireproof component 111 to ensure uniform distribution of connection force.

[0113] The lug provides a reliable mounting position for the assembly 125, ensuring the stress on the fasteners and the connection strength of the fireproof component 111. The radial extension of the lug increases the area of ​​the connection surface and the mechanical leverage, which helps to enhance the connection strength and overall structural rigidity. The connecting lug 124 can be designed with a positioning function (such as a boss or groove) to assist in the correct alignment of the fireproof component 111.

[0114] Alternatively, the lug structure is easy to stamp, cast or machine, reducing manufacturing complexity.

[0115] The fitting 125 consists of fastening elements such as screws, rivets, nuts, and clips, and is installed on the connecting lug 124. The fitting 125 securely connects adjacent fireproof components 111 through the connecting lug 124, forming a mechanical connection point. The fitting 125 corresponds to the mounting holes or slots of the connecting lug 124 to ensure correct installation of the fasteners and force transmission.

[0116] The fitting 125 provides the necessary clamping force to ensure that the fireproof components 111 do not loosen due to vibration or thermal expansion. The fitting 125, using screws or similar components, allows for the disassembly of the fireproof components 111, facilitating maintenance and replacement. The fitting 125 mates with the connecting lug 124 to ensure even stress distribution at the connection point, preventing localized stress concentration that could lead to breakage.

[0117] Fireproof components 111 are connected to each other via fittings 125 to form an integral fireproof cover assembly 11. The fittings 125 serve as a connecting medium, fixing the connecting lugs 124 of adjacent fireproof components 111 to achieve modular assembly. The connecting lugs 124 and fittings 125 are distributed at multiple circumferential positions of the fireproof components 111 to ensure the stability and uniformity of the connection.

[0118] Adjacent fireproof components 111 are connected by fittings 125 to form a complete fireproof cover assembly 11, achieving an overall fire barrier. Multiple connections distribute the assembly load, ensuring the mechanical strength and durability of the cover structure. Detachable connections facilitate the removal and replacement of individual fireproof components 111, reducing maintenance costs. The design of the fittings and connecting lugs 124 ensures precise positioning and fastening of the fireproof components 111, guaranteeing the sealing and fire-resistant performance of the receiving cavity 112.

[0119] It is understandable that the connecting lug 124, as an extension of the outer peripheral wall of the fireproof component 111, supports the installation of the assembly 125, ensuring the stability of the connection structure and a reasonable stress distribution. The mounting holes or slots of the assembly 125 and the connecting lug 124 correspond precisely, ensuring accurate installation of the fasteners, a firm connection, and easy disassembly.

[0120] Multiple connecting lugs 124 and fittings 125 are evenly distributed around the fireproof component 111 to ensure uniform stress distribution and prevent local stress concentration from causing connection failure.

[0121] In summary, the mechanical connection points between the fireproof components 111 in this solution are clearly defined, and the structure is stable and reliable. The assembly 125 enables the fireproof components 111 to be detached and firmly connected, facilitating maintenance and replacement. The radial extension design of the connecting lugs 124 improves the connection strength and assembly positioning accuracy. The multi-point uniform connection distributes the load, ensuring the overall mechanical rigidity and fire-resistant performance of the fireproof cover assembly 11.

[0122] In some embodiments, the connecting lugs 124 and the cable outlet holes 113 of the fireproof cover assembly 11 are optionally arranged circumferentially to ensure balanced stress distribution on the cover structure, reduce local stress concentration, and improve overall mechanical rigidity and durability. The uniformly arranged connecting lugs 124 and cable outlet holes 113 provide clear reference and positioning benchmarks for assembly, simplifying the assembly process, facilitating rapid positioning and installation, and improving assembly efficiency and maintenance convenience. The cable outlet holes 113 are evenly distributed in the center, which, together with the uniform layout of the connecting lugs 124, reasonably disperses the impact of the openings on the cover structure, ensuring the fire-resistant performance and structural integrity of the fireproof cover assembly 11.

[0123] Specifically, the center points of the connecting lugs 124 are evenly distributed along the circumference (circumferential direction) of the motor body 12. As the connecting parts of the fireproof component 111, the even distribution of the connecting lugs 124 ensures balanced force distribution during connection.

[0124] The connecting lugs 124 are arranged circumferentially along the outer peripheral wall of the fireproof component 111, forming a ring-shaped distribution. Optionally, multiple connecting lugs 124 are arranged at equal intervals. Alternatively, multiple connecting lugs 124 and the cable outlet 113 are arranged at equal intervals.

[0125] The connecting lugs 124 and the cable outlet holes 113 are evenly distributed and positioned appropriately. Their circumferential layout is coordinated to avoid overlapping while ensuring connection strength and electrical path.

[0126] Optionally, multiple connecting lugs 124 and wire outlet holes 113 are evenly distributed circumferentially, for example, three connecting lugs 124 and one wire outlet hole 113, with the center points of the four structures evenly arranged, and the circumferential angle between any two adjacent center points corresponding to the axis of the motor body 12 is 90°.

[0127] Optionally, the number of outlet holes 113 can be multiple or one.

[0128] In summary, the layout of the connecting lug 124 and the cable outlet 113 in this solution is coordinated, taking into account both the fire-retardant performance of the cover and the functional opening requirements. The assembly process is simplified, the assembly positioning is accurate, and the assembly efficiency and maintenance convenience of the whole machine are improved.

[0129] In some embodiments, the connecting protrusions 126 and connecting lugs 124 are optionally and evenly distributed in the circumferential direction to form an interlocking and balanced connection structure system. This ensures that the connecting protrusions 126 of the motor body 12 and the connecting lugs 124 of the fireproof component 111 correspond to each other and are arranged in an alternating manner, guaranteeing the uniform distribution and force balance of the connection points, and improving the overall connection strength and the mechanical rigidity of the cover. The alternating connecting protrusions 126 and connecting lugs 124 serve as positioning and fastening structures, ensuring accurate alignment between the motor body 12 and the fireproof component 111, reducing assembly errors, improving assembly efficiency, and enhancing the sealing of the connection.

[0130] Specifically, the connecting protrusion 126 is a protruding component on the outer surface of the motor body 12, extending radially outward. The connecting protrusion 126 serves as the mechanical interface connecting the motor body 12 and the fireproof component 111, engaging with the connecting lug 124 on the fireproof component 111. The connecting protrusions 126 are evenly distributed circumferentially along the motor body 12, forming a ring arrangement, providing reliable connection positioning points for the fireproof component 111 and ensuring a secure connection. The even distribution of multiple radial protrusions effectively disperses the mechanical load at the connection point. The shape and position of the protrusions assist in the accurate assembly of the fireproof component 111, reducing assembly deviations.

[0131] The connecting lugs 124 on the fireproof component 111 are circumferentially positioned between the connecting protrusions 126 of the two motor bodies 12. The connecting lugs 124 and the connecting protrusions 126 are arranged alternately, and the fireproof component 111 is tightly connected to the connecting protrusions 126 of the motor body 12 through the connecting lugs 124. The connecting lugs 124 are evenly distributed circumferentially on the outer peripheral wall of the fireproof component 111, located in the gaps between adjacent connecting protrusions 126.

[0132] The alternating arrangement of connecting lugs 124 and connecting protrusions 126 avoids concentration of connection points and improves connection stability. The staggered layout of lugs and protrusions forms an interlocking structure, improving the shear and tensile strength of the connection. Connecting lugs 124 serve as mechanical positioning components for the fireproof component 111, guiding the fireproof component 111 to be precisely assembled onto the motor body 12. The evenly distributed connecting lugs 124 prevent local structural weaknesses and enhance the overall rigidity of the enclosure.

[0133] The connecting protrusions 126 and connecting lugs 124 are alternately distributed in the circumferential direction, and there must be a connecting protrusion 126 between any two adjacent connecting lugs 124. The connecting protrusions 126 of the motor body 12 and the connecting lugs 124 of the fireproof component 111 form a complementary mechanical connection system. The two are arranged alternately to form a periodic structure in the circumferential direction.

[0134] Alternating distribution increases the number and uniformity of connection points, preventing loosening or localized stress concentration. The staggered distribution of protrusions and lugs forms positioning slots and bosses, facilitating rapid assembly and positioning. The uniform and staggered connection structure reduces connection gaps and leakage paths, improving the sealing performance of the fireproof cover assembly 11. The multi-point distributed connection structure effectively resists deformation caused by vibration, impact, and thermal expansion.

[0135] The alternating distribution of connecting protrusions 126 and connecting lugs 124 forms an interlocking mechanical connection structure, ensuring a tight fit and accurate positioning between the fireproof component 111 and the motor body 12. The alternating protrusions and lugs are evenly distributed circumferentially, preventing uneven stress at the connection points and improving the overall structural balance and stability. The staggered protrusions and lugs form natural guide grooves and slots, simplifying the assembly process and ensuring a quick and accurate connection between the fireproof component 111 and the motor body 12.

[0136] In summary, this solution enables the alternating and uniform distribution of mechanical connection points between the motor body 12 and the fireproof component 111, improving the stability and rigidity of the connection structure; the interlocking design of the protrusions and lugs ensures accurate assembly positioning, reducing assembly errors and loose connections; the uniform circumferential distribution avoids local stress concentration, enhancing the mechanical durability and fire-retardant performance of the overall fireproof cover assembly 11.

[0137] like Figure 7 As shown, another embodiment of this application provides a refrigeration device 2, which uses the aforementioned motor assembly 1 as the driving core and utilizes the fireproof cover assembly 11 and related structural features provided in the motor assembly 1 to achieve high safety and fire-retardant performance of the refrigeration device 2 during operation.

[0138] By integrating a motor assembly 1 with a complete fireproof cover structure and strong fire resistance, heat insulation, and mechanical stability, the risk of fire caused by internal combustibles or electrical sparks in the motor is significantly reduced, ensuring the long-term stable operation of the refrigeration equipment 2.

[0139] Motor assembly 1 serves as the drive unit of refrigeration equipment 2, and is mechanically connected to and works in coordination with the compressor, fan, or other mechanical components of refrigeration equipment 2. Motor assembly 1 is installed in a suitable location inside refrigeration equipment 2, and is typically directly coupled to the mechanical transmission components of the refrigeration system.

[0140] The motor assembly 1 provides the necessary mechanical power to the refrigeration equipment 2, driving key components such as the compressor or fan to operate normally.

[0141] The fireproof cover assembly 11 effectively prevents combustibles and sparks inside the motor from escaping through the cover, reducing the risk of fire.

[0142] The refrigeration equipment 2 includes the aforementioned motor assembly 1. Since the refrigeration equipment 2 includes any of the aforementioned motor assemblies 1, it has the beneficial effects of any of the aforementioned motor assemblies 1, which will not be elaborated here.

[0143] This application also provides a specific embodiment of a motor fireproof wall (i.e., fireproof cover assembly 11), which forms a fireproof barrier for the motor by adding fireproof wall parts (i.e. fireproof components 111) at both ends of the motor, together with the bearing cover of the motor. The thickness of the fireproof wall parts is ≥0.25mm, and there are lug structures (i.e. connecting lugs 124) on three sides of the non-outlet side. There are through holes (i.e. mounting parts 125) on the lug structures. Two fireproof wall parts can be fixed by screws or rivets. The two fireproof walls on the outlet side wrap around the outlet (i.e. outlet hole 113) in an alternating manner to ensure that the fireproof wall completely covers the projection surface of the motor stator winding.

[0144] The fireproof and flame-retardant structure of the motor is formed by adding fireproof wall parts at both ends of the motor, together with the bearing cover of the motor, to form a fireproof barrier for the motor. The fireproof wall parts have lug structures on three sides other than the outlet, and the lug structures have through holes. Two fireproof wall parts can be fixed by screws or rivets. The two fireproof walls on the outlet side wrap around the outlet in an alternating manner to ensure that the fireproof walls completely cover the projection surface of the motor stator winding.

[0145] It is understandable that for motors with high fire protection requirements, it is necessary to add a metal fireproof wall to the outside of the motor. The solution is to add fireproof wall parts at the front and rear ends of the motor. The fireproof wall parts form three lug structures on the three sides of the non-outlet port. The lugs are asymmetrical along the circumference and have through holes, which can be connected by rivets or screws.

[0146] In this invention, the terms "sealed," "fixed," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installed," "connected," "joined," and "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "joined" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0147] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0148] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0149] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A motor assembly, characterized in that, include: Motor body; A fireproof cover assembly is fitted onto the motor body, and the fireproof cover assembly has a receiving cavity, in which at least a portion of the motor body is disposed; Specifically, the fireproof cover assembly covers the stator core of the motor body along the axial direction and in the radial direction of the motor body.

2. The motor assembly according to claim 1, characterized in that, The fireproof cover assembly includes at least two detachably connected fireproof components, and the receiving cavity is provided inside after the at least two fireproof components are connected.

3. The motor assembly according to claim 2, characterized in that, The motor body is provided with a lead-out terminal, and the motor assembly further includes: A cable outlet is provided on the side wall of the fireproof cover assembly, and the cable outlet is arranged opposite to the cable outlet terminal.

4. The motor assembly according to claim 3, characterized in that, One of the two adjacent fireproof components has a wire outlet protrusion on its side wall and a wire outlet groove on its side wall, and the wire outlet protrusion extends along the axial direction of the motor body; In the case where two adjacent fireproof components are connected, the wire outlet hole is formed between the wire outlet protrusion and the wire outlet groove.

5. The motor assembly according to claim 4, characterized in that, In the circumferential direction of the motor body, the distance between the wire outlet protrusion and the wire outlet groove is no greater than 1 mm.

6. The motor assembly according to claim 2, characterized in that, The number of fireproof components is two, the motor body is connected to the inner wall of one of the fireproof components, and the motor shaft of the motor body passes through the other fireproof component.

7. The motor assembly according to any one of claims 2 to 6, characterized in that, The motor assembly also includes: Multiple connecting lugs extend outward from the outer peripheral wall of the fireproof component along the radial direction of the motor body, and the connecting lugs are provided with mounting accessories; The two adjacent fireproof components are connected by the assembly.

8. The motor assembly according to claim 7, characterized in that, The centers of the plurality of connecting lugs and the center of the wire outlet hole of the fireproof cover assembly are evenly arranged in the circumferential direction of the motor body.

9. The motor assembly according to claim 7, characterized in that, The motor body includes a plurality of connecting protrusions extending radially outward. In the circumferential direction of the motor body, a connecting lug is provided between any two connecting protrusions, and a connecting protrusion is provided between any two connecting lugs.

10. A refrigeration device, characterized in that, Includes the motor assembly as described in any one of claims 1 to 9.

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