Stator assembly, compressor motor, compressor and refrigerator

Abstract

The invention relates to the technical field of compression equipment, in particular to a stator assembly, a compressor motor, a compressor and a refrigerator. An annular structure is formed on the stator core, and a space in the annular structure is used for installing a rotor; the number of the stator coils is multiple, the multiple stator coils are sequentially arranged in the circumferential direction of the annular structure and form an arc arrangement path, and a coil gap is formed between the two ends of the arc arrangement path; and the coil gap is used for arranging a compressor cylinder seat, so that the compressor cylinder seat can be close to the end surface of the stator core at the coil gap. By improving the stator assembly, the distance between the compressor air cylinder seat and the stator iron core can be effectively shortened, and therefore the height of the whole compressor is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of compression equipment, and in particular to a stator assembly, a compressor motor, a compressor and a refrigerator. Background Art

[0002] The permanent magnet synchronous motors used in the variable frequency refrigerator compressors on the market are mostly three-phase concentrated winding structures, and the stator coils on the stator core are evenly distributed around the central axis to form a complete annular coil arrangement structure around the rotor. When designing the compressor cylinder seat, it is necessary to raise the cylinder seat relative to the stator core to avoid the stator coil being higher than the stator core, which will increase the overall height of the compressor. For refrigerator manufacturers, the increase in the height of the compressor means that a larger cabin is needed. When the volume of the entire refrigerator remains unchanged, it can only occupy the volume of the refrigeration and freezer compartment, resulting in a limited volume of the refrigerator. Summary of the invention

[0003] The purpose of the present application is to provide a stator assembly, a compressor motor, a compressor and a refrigerator, which can effectively reduce the distance between the compressor cylinder seat and the stator core by improving the stator assembly, thereby reducing the height of the entire compressor.

[0004] The embodiment of the present application is implemented as follows:

[0005] In a first aspect, an embodiment of the present application provides a stator assembly, comprising a stator core and a stator winding; an annular structure is formed on the stator core, and the space within the annular structure is used to install a rotor; there are multiple stator windings, and the multiple stator windings are arranged in sequence around the circumference of the annular structure to form an arc arrangement path, and a winding gap is formed between the two ends of the arc arrangement path; the winding gap is used to arrange a compressor cylinder seat so that the compressor cylinder seat can be close to the end face of the stator core at the winding gap.

[0006] As an optional embodiment, the stator core is provided with a plurality of through slots spaced apart around the circumference of the rotor, the through slots extend axially along the annular structure, and stator teeth are formed between adjacent through slots; the stator coil passes through two adjacent through slots and is wound around the stator teeth.

[0007] As an optional implementation, the number of the stator teeth is consistent with the number of the stator coils.

[0008] As an optional implementation, a support platform is provided at the notch of the stator core; the support platform has an effective support surface that fits with the compressor cylinder seat; and the effective support surface is perpendicular to the axial direction of the rotor.

[0009] As an optional implementation, a side of the support platform facing away from the rotor is provided with an avoidance groove, and an extending direction of the avoidance groove is consistent with the axial direction of the rotor.

[0010] As an optional implementation, there are two winding gaps symmetrically arranged about the rotor, there are two compressor cylinder seats and the installation positions correspond one-to-one to the positions of the two winding gaps.

[0011] In the second aspect, an embodiment of the present application provides a compressor motor, comprising the above-mentioned stator assembly, a compressor cylinder seat and a rotor; the rotor is installed in the annular structure of the stator assembly; the compressor cylinder seat is arranged at one end of the stator assembly, and the compressor cylinder seat is close to the end face of the stator core at the notch of the wire package.

[0012] As an optional implementation, a first connecting portion is provided on the compressor cylinder seat; a second connecting portion is provided on the stator core, and the first connecting portion and the second connecting portion are connected via a locking member.

[0013] As an optional implementation, there are multiple first connection parts and they are arranged at intervals around the rotor axis; the number of the second connection parts is consistent with the number of the first connection parts and they are connected one-to-one.

[0014] In the third aspect, an embodiment of the present application provides a compressor, comprising an external protective shell and the above-mentioned compressor motor arranged in the external protective shell; a cylinder is arranged on the compressor cylinder seat, a piston is arranged in the cylinder, a crankshaft connecting rod connected to a rotor is arranged on the piston, and the rotor drives the piston to move back and forth in the cylinder through the crankshaft connecting rod.

[0015] In a fourth aspect, an embodiment of the present application further provides a refrigerator, comprising the above-mentioned compressor and a compartment for storing items.

[0016] The beneficial effects of the embodiments of the present application include:

[0017] A stator assembly provided in an embodiment of the present application includes a stator core and a stator winding package; an annular structure is formed on the stator core of the embodiment of the present application, and the space within the annular structure is used to install the rotor. There are multiple stator winding packages in the embodiment of the present application, and the multiple stator winding packages are arranged in sequence around the circumference of the annular structure to form an arc arrangement path, and a winding package gap is formed between the two ends of the arc arrangement path. In the embodiment of the present application, a compressor cylinder seat is arranged at the winding package gap, so that the compressor cylinder seat can be close to the end face of the stator core at the winding package gap. Compared with the prior art, the stator winding package of the embodiment of the present application is not arranged in a complete annular path around the rotor to form a winding package gap, so that the compressor cylinder seat can be as close to the stator core as possible, thereby eliminating the distance between the compressor cylinder seat and the end face of the stator core, so that the size of the compressor in the axial direction of the rotor is reduced.

[0018] The embodiment of the present application provides a compressor motor, including the above-mentioned stator assembly, a compressor cylinder seat and a rotor; the rotor of the embodiment of the present application is installed in the annular structure of the stator assembly; the compressor cylinder seat of the embodiment of the present application is arranged at one end of the stator assembly, and the compressor cylinder seat is close to the end face of the stator core at the notch of the wire package. The compressor motor provided by the embodiment of the present application adopts the above-mentioned stator assembly, which enables the compressor cylinder seat to be as close to the stator core as possible, thereby eliminating the distance between the compressor cylinder seat and the end face of the stator core, so that the size of the compressor in the axial direction of the rotor is reduced.

[0019] The embodiment of the present application provides a compressor, including an outer protective shell and the above-mentioned compressor motor disposed in the outer protective shell; a cylinder is disposed on the cylinder seat of the compressor, a piston is disposed in the cylinder, a crankshaft connecting rod connected to a rotor is disposed on the piston, and the rotor drives the piston to move back and forth in the cylinder through the crankshaft connecting rod. The compressor provided in the embodiment of the present application adopts the above-mentioned compressor motor, and the overall height of the compressor can be reduced, so that the volume of the refrigeration and freezing chamber will not be squeezed, so that the refrigerator can have a larger volume.

[0020] The present application also provides a refrigerator, including the above compressor and a compartment for storing items. The refrigerator provided by the present application adopts the above compressor. Compared with the prior art, the above compressor has the advantage of being small in size, which is conducive to increasing the volume of the refrigerator's refrigeration compartment and freezer compartment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is one of the structural schematic diagrams of the stator assembly of the embodiment of the present application;

[0023] Figure 2 This is the second structural schematic diagram of the stator assembly of the embodiment of the present application;

[0024] Figure 3 This is the third structural schematic diagram of the stator assembly of the embodiment of the present application;

[0025] Figure 4 This is the fourth structural schematic diagram of the stator assembly of the embodiment of the present application;

[0026] Figure 5 This is the fifth structural diagram of the stator assembly of the embodiment of the present application;

[0027] Figure 6 This is the sixth structural diagram of the stator assembly of the embodiment of the present application;

[0028] Figure 7 This is a schematic diagram of the structure of the compressor according to the embodiment of the present application;

[0029] Figure 8 It is one of the structural schematic diagrams of the stator assembly in the prior art;

[0030] Fig. 9 This is the second structural schematic diagram of the stator assembly in the prior art.

[0031] icon:

[0032] 100- stator core; 101- stator winding package; 102- annular structure; 103- winding package gap; 104- compressor cylinder seat; 105- through slot; 106- stator tooth; 107- support platform; 108- effective support surface; 109- avoidance groove; 110- rotor; 111- first connecting part; 112- second connecting part; 113- external protective shell; 114- compressor motor; 115- cylinder; 116- piston; 117- crankshaft connecting rod. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0035] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0036] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] At present, the permanent magnet synchronous motors used in variable frequency refrigerator compressors on the market are mostly three-phase concentrated winding structures. Figure 8 , Fig. 9 As shown in the figure, the stator coils on the stator core are evenly distributed around the central axis, forming a complete annular coil arrangement structure around the rotor. When designing the compressor cylinder seat, it is necessary to raise the cylinder seat relative to the stator core to avoid the stator coils being higher than the stator core, which will increase the overall height of the compressor. For refrigerator manufacturers, the increase in the height of the compressor means that a larger cabin is required. When the volume of the entire refrigerator remains unchanged, it can only occupy the volume of the refrigeration and freezer compartment, resulting in a limited volume of the refrigerator.

[0038] In order to solve the above technical problems, the embodiments of the present application provide a stator assembly, a compressor motor 114, a compressor and a refrigerator.

[0039] Reference Figure 1 , Figure 2 as well as Figure 3As shown, an embodiment of the present application provides a stator assembly, including a stator core 100 and a stator winding 101; an annular structure 102 is formed on the stator core 100, and the space within the annular structure 102 is used to install a rotor 110; there are multiple stator windings 101, and the multiple stator windings 101 are arranged in sequence around the circumference of the annular structure 102 to form an arc arrangement path, and a winding gap 103 is formed between the two ends of the arc arrangement path; the winding gap 103 is used to arrange a compressor cylinder seat 104, so that the compressor cylinder seat 104 can be close to the end face of the stator core 100 at the winding gap 103.

[0040] It should be noted that the compressor cylinder base 104 is arranged at the upper end of the stator core 100 .

[0041] The stator windings 101 of the embodiment of the present application are arranged in sequence in the circumferential direction around the rotor 110. The arc arrangement path of the stator windings 101 does not form a complete ring. A winding gap 103 is formed at a position corresponding to the compressor cylinder seat 104 to prevent the height of the stator windings 101 from blocking the compressor cylinder seat 104 from approaching the stator core 100.

[0042] It should be noted that the compressor cylinder seat 104 forms a projection on the stator core 100 along the axial direction of the rotor 110 , and the projection falls into the winding notch 103 .

[0043] Regarding the explanation of the coil gap 103, the position of the coil gap 103 corresponds to the compressor cylinder seat 104 along the axial direction of the rotor 110. The opening spacing of the coil gap 103 is slightly greater than or equal to the size of the compressor cylinder seat 104 in the circumferential direction of the rotor 110. It should be noted that the stator assembly of the embodiment of the present application is essentially a structure without stator coils at a specific part of the circumference of the rotor 110, eliminating the obstruction of the stator coil 101 to the compressor cylinder seat 104 and components such as the piston 116 and the connecting rod, so that the compressor cylinder seat 104 can be as close to the stator core 100 as possible.

[0044] Reference Figure 6 , Fig. 9 As shown, regarding the number of stator windings 101, in the prior art, 9 stator windings 101 arranged in sequence are usually provided on the stator core 100; in the embodiment of the present application, 6 stator windings 101 arranged in sequence can be provided to form the winding gap 103.

[0045] It should be noted that those skilled in the art can design the number of stator coils 101 as required, and there is no particular limitation on this.

[0046] A stator assembly provided in an embodiment of the present application includes a stator core 100 and a stator coil 101; an annular structure 102 is formed on the stator core 100 in the embodiment of the present application, and the space in the annular structure 102 is used to install a rotor 110. There are multiple stator coils 101 in the embodiment of the present application, and the multiple stator coils 101 are arranged in sequence around the circumference of the annular structure 102 to form an arc arrangement path, and a coil gap 103 is formed between the two ends of the arc arrangement path.

[0047] In the embodiment of the present application, the compressor cylinder seat 104 is arranged at the wire package notch 103 so that the compressor cylinder seat 104 can be close to the end surface of the stator core 100 at the wire package notch 103 .

[0048] It should be noted that the compressor cylinder seat 104 can be directly fitted with the end surface of the stator core 100, in which case the height of the compressor cylinder seat 104 can be reduced to the greatest extent. Of course, a certain gap can be provided between the compressor cylinder seat 104 and the surface of the stator core 100 as required. It should be noted that as long as the gap is smaller than the size of the stator coil 101 protruding from the stator core 100, the effect of reducing the height of the compressor can be achieved.

[0049] Compared with the prior art, the stator winding 101 of the embodiment of the present application is not arranged in a complete annular path around the rotor 110, forming a winding gap 103, so that the compressor cylinder seat 104 can be as close to the stator core 100 as possible, thereby eliminating the distance between the compressor cylinder seat 104 and the end face of the stator core 100, so that the axial size of the compressor on the rotor 110 is reduced.

[0050] Reference Figure 4 , Figure 5 As shown, as an optional embodiment, the stator core 100 is provided with a plurality of through slots 105 circumferentially spaced around the rotor 110, the through slots 105 extend axially along the annular structure 102, and stator teeth 106 are formed between adjacent through slots 105; the stator coil 101 passes through two adjacent through slots 105 and is wound on the stator teeth 106.

[0051] It should be noted that the number of stator teeth 106 can be greater than the number of stator winding packages 101. For example, there are 9 stator teeth 106 and 6 stator winding packages 101, and 3 stator winding packages 101 are partially inserted into the stator winding package 101 to form the winding package gap 103.

[0052] Preferably, the number of stator teeth 106 is consistent with the number of stator coils 101 .

[0053] Exemplarily, six stator windings 101 are correspondingly mounted on six stator teeth 106. At this time, the space at the winding gap 103 can accommodate three stator windings 101, but the stator windings 101 are not set. A circle of 360 degrees around the rotor 110 is formed. At this time, the center angle corresponding to one stator winding 101 or one stator tooth 106 is 40 degrees, that is, the stator winding 101 is continuously arranged 240 degrees around the circumference, and the center angle corresponding to the winding gap 103 is 120 degrees.

[0054] Exemplarily, nine stator windings 101 are correspondingly mounted on nine stator teeth 106. At this time, the space at the winding gap 103 can accommodate three stator windings 101, but the stator windings 101 are not set. A circle of 360 degrees around the rotor 110 is formed. At this time, the center angle corresponding to one stator winding 101 or one stator tooth 106 is 30 degrees, that is, the stator winding 101 is continuously arranged 270 degrees around the circumference, and the center angle corresponding to the winding gap 103 is 90 degrees.

[0055] Reference Figure 4 , Figure 5 As shown, as an optional embodiment, the stator core 100 is provided with a support platform 107 at the wire package notch 103; the support platform 107 has an effective support surface 108 that fits the compressor cylinder seat 104; the effective support surface 108 is perpendicular to the axial direction of the rotor 110.

[0056] Preferably, the embodiment of the present application enables the compressor cylinder seat 104 to be in direct contact with the stator core 100 , so that the compressor cylinder seat 104 is lowered to the greatest extent.

[0057] As an optional implementation, a side of the support platform 107 facing away from the rotor 110 is provided with an avoidance groove 109 , and an extending direction of the avoidance groove 109 is consistent with the axial direction of the rotor 110 .

[0058] Furthermore, the embodiment of the present application can arrange other structures on the one hand through the provision of the avoidance groove 109, and can reduce the weight of the stator core 100 on the other hand, which is conducive to achieving a lightweight design.

[0059] Reference Figure 7 As shown, an embodiment of the present application provides a compressor motor 114, including the above-mentioned stator assembly, compressor cylinder seat 104 and rotor 110; the rotor 110 of the embodiment of the present application is installed in the annular structure 102 of the stator assembly; the compressor cylinder seat 104 of the embodiment of the present application is arranged at one end of the stator assembly, and the compressor cylinder seat 104 is close to the end face of the stator core 100 at the wire package notch 103.

[0060] The compressor motor 114 provided in the embodiment of the present application adopts the above-mentioned stator assembly, which enables the compressor cylinder seat 104 to be as close to the stator core 100 as possible, thereby eliminating the distance between the compressor cylinder seat 104 and the end face of the stator core 100, so that the axial size of the compressor on the rotor 110 is reduced.

[0061] Further, see Figure 1 , Figure 2 As shown, a first connecting portion 111 is provided on the compressor cylinder seat 104; a second connecting portion 112 is provided on the stator core 100, and the first connecting portion 111 and the second connecting portion 112 are connected via a locking member.

[0062] There are a plurality of first connection parts 111 which are arranged at intervals around the axis of the rotor 110 ; the number of the second connection parts 112 is the same as that of the first connection parts 111 and they are connected one-to-one.

[0063] It should be noted that there may be four first connection parts 111 which are evenly spaced around the circumference of the rotor 110. A stable connection can be achieved through the first connection parts 111 and the second connection parts 112.

[0064] Reference Figure 7 As shown, an embodiment of the present application provides a compressor, including an external protective shell 113 and the above-mentioned compressor motor 114 arranged in the external protective shell 113; a cylinder 115 is arranged on the compressor cylinder seat 104, a piston 116 is arranged in the cylinder 115, and a crankshaft connecting rod 117 connected to the rotor 110 is arranged on the piston 116. The rotor 110 drives the piston 116 to move back and forth in the cylinder 115 through the crankshaft connecting rod 117.

[0065] As an optional implementation, there are two winding package gaps 103 symmetrically arranged about the rotor 110 , and there are two compressor cylinder seats 104 whose installation positions correspond one-to-one to the positions of the two winding package gaps 103 .

[0066] Furthermore, the embodiment of the present application has two symmetrical coil gaps 103, and each coil gap 103 may correspond to a compressor cylinder seat 104. It should be noted that cylinders 115 may be formed in the two compressor cylinder seats 104, respectively, to form two double-cylinder structures. Pistons 116 are respectively provided in the two cylinders 115, and a set of crankshaft connecting rods 117 connected to the rotor 110 is provided on the pistons 116 to realize the linkage of the two pistons 116. The provision of two cylinders 115 can increase the volume of the cylinder 115, which is conducive to enhancing the power of the compressor.

[0067] The compressor provided in the embodiment of the present application adopts the above-mentioned compressor motor 114, and the overall height of the compressor can be reduced, so it will not occupy the volume of the refrigeration and freezing chamber, so that the refrigerator can have a larger volume.

[0068] In addition, an embodiment of the present application also provides a refrigerator, including the above-mentioned compressor and a compartment for storing items.

[0069] The refrigerator provided in the embodiment of the present application adopts the above-mentioned compressor. Compared with the prior art, the above-mentioned compressor has the advantage of being small in size, which is conducive to increasing the volume of the refrigerator's refrigeration chamber and freezer chamber.

[0070] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A stator assembly, characterized in that: The invention comprises a stator core (100) and a stator coil (101); an annular structure (102) is formed on the stator core (100); the space inside the annular structure (102) is used to install a rotor (110); there are a plurality of stator coils (101), the plurality of stator coils (101) are sequentially arranged around the circumference of the annular structure (102) to form an arc arrangement path, and a coil gap (103) is formed between the two ends of the arc arrangement path; the coil gap (103) is used to arrange a compressor cylinder seat (104) so ​​that the compressor cylinder seat (104) can be close to the end face of the stator core (100) at the coil gap (103).

2. The stator assembly according to claim 1, characterized in that The stator core (100) is provided with a plurality of through slots (105) arranged at intervals in the circumferential direction around the rotor (110); the through slots (105) extend in the axial direction of the annular structure (102); and stator teeth (106) are formed between adjacent through slots (105); and the stator coil (101) passes through two adjacent through slots (105) and is wound around the stator teeth (106).

3. The stator assembly according to claim 2, characterized in that: The number of the stator teeth (106) is consistent with the number of the stator coils (101).

4. The stator assembly according to claim 3, characterized in that: The stator core (100) is provided with a support platform (107) at the coil notch (103); the support platform (107) has an effective support surface (108) that fits the compressor cylinder seat (104); and the effective support surface (108) is perpendicular to the axial direction of the rotor (110).

5. The stator assembly according to claim 4, characterized in that A side of the support platform (107) facing away from the rotor (110) is provided with an avoidance groove (109), and an extending direction of the avoidance groove (109) is consistent with the axial direction of the rotor (110).

6. The stator assembly according to any one of claims 1 to 5, characterized in that: It has two winding package gaps (103) symmetrically arranged with respect to the rotor (110), and has two compressor cylinder seats (104) whose installation positions correspond one-to-one to the positions of the two winding package gaps (103).

7. A compressor motor (114), characterized in that: It comprises the stator assembly, a compressor cylinder seat (104) and a rotor (110) as described in any one of claims 1 to 6; the rotor (110) is installed in the annular structure (102) of the stator assembly; the compressor cylinder seat (104) is arranged at one end of the stator assembly, and the compressor cylinder seat (104) is close to the end face of the stator core (100) at the wire package notch (103).

8. The compressor motor (114) according to claim 7, characterized in that The compressor cylinder seat (104) is provided with a first connecting portion (111); the stator core (100) is provided with a second connecting portion (112), and the first connecting portion (111) and the second connecting portion (112) are connected via a locking member.

9. The compressor motor (114) according to claim 8, characterized in that There are a plurality of the first connection parts (111) which are arranged at intervals around the axis of the rotor (110); the number of the second connection parts (112) is the same as the number of the first connection parts (111) and they are connected in a one-to-one correspondence.

10. A compressor, characterized in that: It comprises an external protective shell (113) and a compressor motor (114) as described in any one of claims 7 to 9 arranged in the external protective shell (113); a cylinder (115) is arranged on the compressor cylinder seat (104), a piston (116) is arranged in the cylinder (115), a crankshaft connecting rod (117) connected to a rotor (110) is arranged on the piston (116), and the rotor (110) drives the piston (116) to move back and forth in the cylinder (115) through the crankshaft connecting rod (117).

11. A refrigerator, characterized in that: The invention comprises the compressor as claimed in claim 10, and a compartment for storing items.

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