Cooling structure for scroll compressor and scroll compressor

Abstract

The utility model relates to the technical field of scroll compressors, in particular to a cooling structure for a scroll compressor and the scroll compressor, the cooling structure for the scroll compressor comprises a blade assembly arranged below a motor assembly of the scroll compressor, and the blade assembly is installed on a crankshaft of the scroll compressor. According to the cooling structure for the scroll compressor and the scroll compressor, the problem that during low-speed operation of the scroll compressor, an existing cooling structure is difficult to meet the cooling requirement of a motor can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of scroll compressors, in particular to a cooling structure for a scroll compressor and the scroll compressor. BACKGROUND

[0002] In view of the current pursuit of efficiency and large displacement of scroll compressors, synchronous motors have become the mainstream choice. However, the magnets in the synchronous motor will undergo irreversible demagnetization phenomenon under high temperature conditions, thereby causing the motor output power to decrease and the overall efficiency to decrease. In addition, the insulating paper of the stator is also prone to accelerate aging under high temperature environment, resulting in poor insulation. Especially during the low-speed operation of the scroll compressor, the flow inside is small under the low-speed operation state, so that the heat cannot be discharged with the refrigerant, thereby causing the motor temperature to be too high, causing the motor to be damaged.

[0003] At present, the commonly used cooling method in the industry is to add flow-through grooves on the stator and the rotor to expand the fluid passage area of the stator and the rotor. However, in the case of low-speed operation of the scroll compressor, the internal flow is limited, resulting in the effect of the above cooling measures often being unsatisfactory. This is because, under the premise that the flow itself is limited, simply expanding the flow area is still difficult to effectively reduce the temperature of the motor. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the purpose of the present application is to provide a cooling structure for a scroll compressor to solve the problem that the existing cooling structure cannot meet the cooling needs of the motor during the low-speed operation of the scroll compressor.

[0005] According to the first aspect of the present application, a cooling structure for a scroll compressor is provided, wherein the cooling structure for the scroll compressor comprises: a vane assembly arranged below a motor assembly of the scroll compressor, the vane assembly being installed on a crankshaft of the scroll compressor, and the vane assembly being capable of rotating synchronously with the crankshaft to generate upward airflow.

[0006] Preferably, the vane assembly comprises: a sleeve portion sleeved on the crankshaft, the sleeve portion being capable of rotating synchronously with the crankshaft; and a plurality of fan blades arranged on the outer wall of the sleeve portion in the circumferential direction, the fan blades being capable of rotating synchronously with the sleeve portion and generating upward airflow.

[0007] Preferably, the fan blades are inclined from top to bottom in the rotation direction of the crankshaft.

[0008] Preferably, the number of fan blades is three, and the three fan blades are uniformly arranged in the circumferential direction.

[0009] Preferably, the sleeve portion is interference fit with the crankshaft, or the sleeve portion is connected with the crankshaft by a key and a circlip.

[0010] According to the second aspect of the present application, a scroll compressor is provided, wherein the scroll compressor comprises a crankshaft, a motor assembly, and the cooling structure for scroll compressor as described above, the vane assembly is installed on the crankshaft, and the vane assembly is arranged at the lower part of the motor assembly.

[0011] Preferably, the motor assembly comprises a rotor installed on the crankshaft, and a stator sleeved on the outside of the crankshaft, an air gap is formed between the stator and the rotor, and a gas passage is formed between the stator and the tube shell of the scroll compressor.

[0012] Preferably, the upper part of the stator is provided with an upper winding, the lower part of the stator is provided with a lower winding, a part of the air flow generated by the vane assembly flows to the air gap, and then passes through the upper winding to reach the exhaust pipe of the scroll compressor, and another part of the air flow passes through the lower winding and then flows to the gas passage, and then reaches the exhaust pipe of the scroll compressor.

[0013] Preferably, the diameter of the vane assembly is greater than the outer diameter of the rotor, and the diameter of the vane assembly is less than the inner diameter of the lower winding.

[0014] Preferably, the vane assembly is arranged below the bottom end of the lower winding.

[0015] The cooling structure for scroll compressor and the scroll compressor of the present application have the vane assembly arranged below the motor assembly of the scroll compressor. The vane assembly is installed on the crankshaft of the scroll compressor, so that the vane assembly can rotate synchronously with the crankshaft to generate upward air flow. In this way, the air flow in the scroll compressor can be stirred, and the air flow can be guided to the motor assembly, so that the air flow can quickly take away the heat generated by the motor assembly, thereby achieving the cooling of the motor. Furthermore, the problem that the existing cooling structure cannot meet the cooling demand of the motor during the low-speed operation of the scroll compressor is effectively solved.

[0016] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of the drawings.

[0018] Figure 1 is a schematic view of a scroll compressor according to the present application.

[0019] Figure 2 is a schematic view of a cooling structure for a scroll compressor according to the present application.

[0020] Figure 3 is a schematic view of a cooling structure for a scroll compressor according to the present application from another angle.

[0021] Reference signs: 1 - blade assembly; 10 - sleeve portion; 11 - vane; 2 - motor assembly; 21 - rotor; 210 - air gap; 22 - stator; 220 - gas passage; 221 - upper winding; 222 - lower winding; 3 - crankshaft; 4 - casing; 50 - exhaust pipe; 51 - intake pipe; 6 - gas flow. DETAILED DESCRIPTION

[0022] The following detailed description is provided to help the reader understand the method, device and / or system described herein. However, various changes, modifications and equivalents can become apparent to those skilled in the art after understanding the disclosure provided herein. For example, the order of the operations described herein is merely an example, and is not limited to the order set forth herein, but can make changes that will be apparent to those skilled in the art after understanding the disclosure provided herein, except for the operations that must occur in a specific order. In addition, the description of features known in the art can be omitted in order to improve clarity and conciseness.

[0023] The features described herein can be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to show some of the many ways in which the methods, devices and / or systems described herein can be implemented after understanding the disclosure provided herein.

[0024] Throughout the specification, when an element (such as a layer, region or substrate) is referred to as being "on" another element, "connected to" another element, "coupled to" another element, "adjacent to" another element, "on top of" another element or "covering" another element, it can be directly on, connected to, coupled to, adjacent to, on top of, or covering the other element, or one or more other elements can be interposed therebetween. In contrast, when an element is referred to as being "directly on", "directly connected to", "directly coupled to", "directly adjacent to", "directly on top of", or "directly covering" another element, there are no other elements interposed therebetween.

[0025] As used herein, the term "and / or" includes any one of the listed items and any combination of two or more of the listed items.

[0026] Although terms such as "first", "second", and "third" can be used herein to describe various components, assemblies, regions, layers or sections, these components, assemblies, regions, layers or sections are not limited by these terms. Rather, these terms are only used to distinguish one component, assembly, region, layer or section from another component, assembly, region, layer or section. Thus, a component, assembly, region, layer or section referred to as a first component, assembly, region, layer or section in one example described herein can also be referred to as a second component, assembly, region, layer or section in another example without departing from the teachings of the examples.

[0027] For ease of description, spatial relationship terms, such as "on", "upper", "beneath", and "lower", can be used herein to describe one element's relationship to another element as illustrated in the figures. Such spatial relationship terms can be intended to encompass different orientations of the device in use or operation, in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, a component described as on "top" or the "upper" of another component would then be oriented on the "bottom" or "lower" of the other component. Accordingly, the term "on" encompasses both a "on" and "under" orientation in accordance with the spatial orientation of the device. The device can be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatial relationship terms used herein interpreted accordingly.

[0028] The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of examples. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including" and "has" are listed means of mentioning the presence of stated features, integers, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, operations, components, elements, and / or combinations thereof.

[0029] Variations in the shapes illustrated in the drawings can occur as a result of manufacturing processes and / or tolerances. Thus, the examples described herein are not limited to the specific shapes illustrated in the drawings, but include variations in shapes that occur during manufacturing.

[0030] Features of the examples described herein can be combined with one another in any manner, as would be apparent to one of skill in the art after understanding the disclosure provided herein. Furthermore, although examples described herein have various configurations, other configurations are possible as would be apparent to one of skill in the art after understanding the disclosure provided herein.

[0031] As Figures 1 to 3 indicated, a cooling structure for scroll compressor according to the first aspect of the present application is provided, which includes a vane assembly 1.

[0032] In the following description, reference is made to the Figures 1 to 3 The specific structure of the above components of the cooling structure for scroll compressor and the connection relationship of the above components are specifically described.

[0033] As Figures 1 to 3 indicated, in the embodiment, the vane assembly 1 can be arranged below the motor assembly 2 of the scroll compressor. The vane assembly 1 can be installed on the crankshaft 3 of the scroll compressor, so that the vane assembly 1 can rotate synchronously with the crankshaft 3 to generate upward airflow 6. In this way, the airflow 6 in the scroll compressor can be stirred, the airflow 6 can be guided to the motor assembly 2, and the airflow 6 can quickly take away the heat generated by the motor assembly 2, so as to achieve the cooling of the motor assembly 2.

[0034] Preferably, as Figure 1 indicated, in the embodiment, the scroll compressor is provided with an air inlet pipe 51 and an air outlet pipe 50. The refrigerant airflow 6 can enter the scroll compressor through the air inlet pipe 51 and finally flow to the air outlet pipe 50 for discharge. The vane assembly 1 plays a role in guiding the airflow 6 and enhancing the flow of the airflow 6. The vane assembly 1 can promote the refrigerant airflow 6 to flow from below the motor assembly 2 to above the motor assembly 2 (i.e., to generate upward airflow 6), and in the process of passing through the motor assembly 2, the airflow 6 can take away the heat generated by the motor assembly 2, and finally discharge the heat from the air outlet pipe 50.

[0035] Preferred, such as Figures 1 to 3 As shown, in this embodiment, the blade assembly 1 may include a sleeve portion 10 and a plurality of blades 11. The sleeve portion 10 can be fitted onto the crankshaft 3, allowing it to rotate synchronously with the crankshaft 3. This configuration eliminates the need for an additional power source for the blade assembly 1, saving both internal space and cost of the scroll compressor. The plurality of blades 11 are circumferentially arranged on the outer wall of the sleeve portion 10, and the blades 11 rotate synchronously with the sleeve portion 10. During rotation, the blades 11 generate an upward airflow 6 to guide the refrigerant to the motor assembly 2.

[0036] Furthermore, preferably, such as Figures 1 to 3 As shown, in this embodiment, the fan blade 11 can be inclined from top to bottom along the rotation direction of the crankshaft 3. Specifically, the crankshaft 3 can rotate clockwise in a top-view position, so that the sleeve portion 10 and the fan blade 11 also rotate clockwise in a top-view position. In order to generate an upward airflow 6 during the rotation of the blade assembly 1, the fan blade 11 can be inclined from top to bottom in a clockwise direction in a top-view position, thereby guiding the refrigerant.

[0037] In addition, preferred, such as Figures 1 to 3 As shown, in this embodiment, the number of fan blades 11 can be three, and the three fan blades 11 can be evenly arranged in the circumferential direction to generate a stable airflow 6. This arrangement not only ensures that the blade assembly 1 can generate sufficient airflow 6, but also effectively simplifies the overall structure and reduces manufacturing costs. However, it is not limited to this. Setting the number of fan blades 11 to three is only a preferred case in this embodiment. In use, the number of fan blades 11 can also be set to other numbers according to actual needs. For example, the number of fan blades can be four, and the four fan blades can be evenly arranged in the circumferential direction.

[0038] Further optimized, such as Figure 1 As shown, in the embodiment, the sleeve portion 10 and the crankshaft 3 can be fixed by an interference fit, thereby fixing the blade assembly 1 as a whole on the crankshaft 3, so that the fan blade 11 can rotate with the crankshaft 3 to generate an upward airflow 6.

[0039] In another embodiment, the sleeve portion 10 and the crankshaft 3 can be connected by a key and a retaining ring. Specifically, a flat key and a keyway can be provided between the sleeve portion 10 and the crankshaft 3, and the sleeve portion 10 is keyed to the crankshaft 3. Simultaneously, the crankshaft 3 can also have a slot at the bottom end corresponding to the sleeve portion 10. The slot is used to install the retaining ring. The bottom end of the sleeve portion 10 can be positioned by the retaining ring.

[0040] In addition, such as Figure 1As shown, according to the second aspect of the utility model provides a scroll compressor, the scroll compressor includes crankshaft 3, motor assembly 2 and the cooling structure for scroll compressor as described above. Among them the cooling structure for scroll compressor's vane assembly 1 can be installed to crankshaft 3, and the vane assembly 1 can be set in the lower portion of motor assembly 2 to generate upward airflow 6, and motor assembly 2 is cooled.

[0041] Preferably, as Figure 1 As shown, in the embodiment, the motor assembly 2 can include rotor 21 and stator 22. Among them, rotor 21 can be fixedly installed on crankshaft 3 to drive the rotation of the crankshaft 3. Stator 22 can be sleeved on the outside of crankshaft 3. The air gap 210 can be formed between the stator 22 and the rotor 21 for the airflow 6 to pass through. In addition, the gas passage 220 can also be formed between the stator 22 and the tube shell 4 of the scroll compressor, which is also used for the airflow 6 to pass through. When the vane assembly 1 generates upward airflow 6, the refrigerant airflow 6 can pass through the air gap 210 and the gas passage 220 to the exhaust pipe 50 of the scroll compressor, and in the process, the refrigerant airflow 6 can take away the heat generated by the motor assembly 2 to achieve the cooling function.

[0042] Further preferably, as Figure 1 As shown, in the embodiment, the upper portion of the stator 22 can be provided with an upper winding 221, and the lower portion of the stator 22 can be provided with a lower winding 222. Specifically, the upper winding 221 and the lower winding 222 can be copper wires, and there is a gap inside for the airflow 6 to pass through, so that the airflow 6 generated by the vane assembly 1 can pass through the upper winding 221 and the lower winding 222 to further cool.

[0043] In addition, preferably, as Figure 1 As shown, in the embodiment, the diameter of the vane assembly 1 can be greater than the outer diameter of the rotor 21 to facilitate the flow of airflow 6 to the air gap 210 and the gas passage 220. The diameter of the vane assembly 1 can be less than the inner diameter of the lower winding 222, so that the airflow 6 needs to pass through the lower winding 222 in the process of flowing to the gas passage 220 to improve the cooling effect of the refrigerant airflow 6. The setting position of the vane assembly 1 can be lower than the bottom end of the lower winding 222 to ensure the flow of airflow 6 to the gas passage 220.

[0044] During use, the refrigerant gas flow 6 can enter from the gas inlet pipe 51 of the scroll compressor, and flow through the gas passage 220 on the side away from the gas outlet pipe 50 to the vane assembly 1. The vane assembly 1 can generate an upward gas flow 6 to guide the refrigerant to the motor assembly 2. Part of the gas flow 6 generated by the vane assembly 1 can flow to the gas gap 210, and then pass through the upper winding 221 to the gas outlet pipe 50 of the scroll compressor. Another part of the gas flow 6 generated by the vane assembly 1 can flow to the gas passage 220 on the side close to the gas outlet pipe 50 after passing through the lower winding 222, and finally reach the gas outlet pipe 50 of the scroll compressor. In this way, the heat of the motor can be discharged, and the motor assembly 2 can be cooled during low-speed operation of the scroll compressor to avoid damage to the motor due to excessive temperature.

[0045] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present application, and are used to illustrate the technical solutions of the present application, but not to limit the same. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can make modifications or easily think of changes to the technical solutions described in the foregoing embodiments, or make equivalent replacements to some of the technical features, within the technical scope disclosed by the present application. Such modifications, changes or replacements do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A cooling structure for a scroll compressor, disposed in the scroll compressor, characterized in that, The cooling structure for the scroll compressor comprises: A vane assembly is arranged below a motor assembly of the scroll compressor, the vane assembly is installed on a crankshaft of the scroll compressor, and the vane assembly can rotate synchronously with the crankshaft to generate upward airflow.

2. The temperature reducing structure for a scroll compressor according to claim 1, characterized in that, The vane assembly comprises: A sleeve part is sleeved on the crankshaft, and the sleeve part can rotate synchronously with the crankshaft; and A plurality of fan blades are arranged on an outer wall of the sleeve part in a circumferential direction, the fan blades can rotate synchronously with the sleeve part and generate upward airflow.

3. The temperature reducing structure for a scroll compressor according to claim 2, characterized in that, The fan blades are arranged in an inclined manner from top to bottom along a rotation direction of the crankshaft.

4. The temperature reducing structure for a scroll compressor according to claim 2, characterized in that The number of the fan blades is three, and the three fan blades are arranged uniformly in a circumferential direction.

5. The temperature reducing structure for a scroll compressor according to claim 2, characterized in that, The sleeve part is in interference fit with the crankshaft, or the sleeve part is connected with the crankshaft through a key and a snap spring.

6. A scroll compressor characterized by, The scroll compressor comprises a crankshaft, a motor assembly, and the cooling structure for the scroll compressor according to any one of claims 1 to 5, the vane assembly is installed on the crankshaft, and the vane assembly is arranged below the motor assembly.

7. The scroll compressor of claim 6, wherein The motor assembly comprises: A rotor is installed on the crankshaft; and A stator is sleeved on an outer portion of the crankshaft, an air gap is formed between the stator and the rotor, and a gas passage is formed between the stator and a tube shell of the scroll compressor.

8. The scroll compressor of claim 7, wherein, An upper portion of the stator is provided with an upper winding, a lower portion of the stator is provided with a lower winding, a part of the airflow generated by the vane assembly flows to the air gap, then passes through the upper winding to reach an exhaust pipe of the scroll compressor, and another part of the airflow passes through the lower winding to flow to the gas passage, and then reaches the exhaust pipe of the scroll compressor.

9. The scroll compressor of claim 8, wherein, A diameter of the vane assembly is greater than an outer diameter of the rotor, and the diameter of the vane assembly is less than an inner diameter of the lower winding.

10. The scroll compressor of claim 8, wherein, The vane assembly is arranged at a position lower than a bottom end of the lower winding.

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