Air compressor with double-air-duct motor casing

Abstract

An air compressor with a double-air-duct motor shell comprises the motor shell and a crankcase connected with the motor shell, a motor assembly is installed in the motor shell, fan blades are installed in the crankcase or the motor shell, an air compression assembly is installed in the crankcase, an outer air duct and an inner air duct are arranged in the motor shell, and the motor shell is provided with an outer air inlet and an inner air inlet. The two ends of the outer air channel communicate with the outer air inlet and the fan blades correspondingly, and the inner air channel communicates with the inner air inlet and the fan blades. According to the air compressor with the double-air-duct motor shell, external cold air is sucked into the outer air duct through the outer air inlet, so that heat dissipation of the air compression assembly in the crankcase is achieved, meanwhile, the external cold air is sucked into the inner air duct through the inner air inlet, heat dissipation is conducted on the motor assembly, and the heat dissipation efficiency is improved. And due to the arrangement of the double air ducts, the air compression assembly and the motor assembly are subjected to heat dissipation through the independent heat dissipation air ducts, and the heat dissipation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air compressors, in particular to an air compressor with a double-air duct motor housing. Background Art

[0002] Air compressor is the main body of the air source device. It is a device that converts the mechanical energy of the prime mover into gas pressure energy. Traditional air compressors generally include a crankcase, one end of the motor shaft extends into the crankcase, and the crankcase is provided with connecting rods and fan blades sleeved on the shaft. The outside of the crankcase is connected to a wind cover, and the side of the crankcase facing the motor is hollowed out. When the air compressor is working, the connecting rod drives the piston to move up and down to realize the air intake of the air compressor, and the fan blades rotate to dissipate heat and cool the motor.

[0003] At present, Chinese utility model patent CN220955974U discloses a heat dissipation structure of an air compressor including a motor and a crankcase, wherein the crankcase has an air intake cavity for air intake of the air compressor, and a fan blade mounted on the rotating shaft of the motor is provided between the crankcase and the motor, and the fan blade is located outside the air intake cavity; the crankcase has an annular wind hood on the side facing the motor, and the wind hood has an installation cavity, and the fan blade is arranged in the installation cavity, the wind hood is open at one end facing the motor, and the wind hood has an air inlet connected to the outside at one end away from the motor.

[0004] But the problem is that the air inlet is set at the end far away from the motor, which cannot effectively dissipate the heat of the crankcase and the motor at the same time, and the heat dissipation efficiency is low. Utility Model Content

[0005] Technical issues to be solved

[0006] In view of this, an embodiment of the present specification provides an air compressor with a double-duct motor housing that can dissipate heat for a crankcase and a motor at the same time and has high heat dissipation efficiency.

[0007] Technical Solution

[0008] To solve the technical problems, the utility model provides the following technical solutions: an air compressor with a dual-duct motor housing, comprising a motor housing and a crankcase connected to the motor housing, a motor assembly installed in the motor housing, fan blades installed in the crankcase or the motor housing, an air compression assembly installed in the crankcase, an external air duct and an internal air duct arranged in the motor housing, an external air inlet and an internal air inlet arranged in the motor housing, two ends of the external air duct are respectively connected to the external air inlet and the fan blades, and the internal air duct is connected to the internal air inlet and the fan blades.

[0009] Compared with the prior art, the advantages of the utility model are: the setting of double air ducts, when the fan blades rotate, the external cold air is sucked into the external air duct through the external air inlet, thereby realizing the heat dissipation of the air compression component in the crankcase, and at the same time, the external cold air is sucked into the internal air duct through the internal air inlet to dissipate the heat of the motor component, thereby realizing the heat dissipation of the crankcase and the motor at the same time. The setting of double air ducts enables the air compression component and the motor component to be cooled through separate cooling air ducts, thereby improving the heat dissipation efficiency.

[0010] In some embodiments, a half-enclosed retaining ring is provided in the motor housing for protecting the coil on the motor assembly, the external air duct is provided on the outside of the half-enclosed retaining ring, and the internal air duct is provided on the inside of the half-enclosed retaining ring. Through the above improvement, the setting of the half-enclosed retaining ring can effectively protect the motor assembly, and prevent external particles from affecting the motor assembly when the external cold air passes through the external air duct.

[0011] In some embodiments, the motor assembly includes a stator, and the gap between the stator and the semi-enclosed retaining ring is less than 1 mm. Through the improvement, the gap between the stator and the semi-enclosed retaining ring is small, preventing larger external particles from entering the inner air duct. When the particles are smaller than 1 mm, the wind force of the fan blades can drive the smaller particles to blow out, preventing the particles from affecting the stator.

[0012] In some embodiments, the motor housing is integrally formed by aluminum die-casting. Through the improvements described above, the integrally formed motor housing has high stability, high production efficiency and low manufacturing cost through the mold.

[0013] In some embodiments, the semi-enclosed retaining ring is made of plastic. Through the above improvements, it has the advantages of light weight, low production cost, good insulation and leakage prevention, and good safety performance.

[0014] In some embodiments, the external air inlet includes a first air inlet and a second air inlet, the first air inlet is arranged perpendicular to the central axis of the motor assembly, and the second air inlet is arranged parallel to the central axis of the motor assembly. Through the improvement, the first air inlet is arranged perpendicular to the central axis of the motor assembly, and the second air inlet is parallel to the motor assembly. The multi-angle air inlet enhances the air intake efficiency of the external air inlet and improves the heat dissipation effect of the air compression assembly.

[0015] In some embodiments, the inner air inlet is arranged around the central axis of the motor assembly. Through the improvement, the air intake is more uniform, and the motor assembly can be cooled in all directions.

[0016] In some embodiments, a filter is installed on the motor housing, and the filter is arranged at a position corresponding to the inner air inlet. Through the above improvement, the setting of the filter can better filter the air entering the inner air duct.

[0017] In some embodiments, the motor housing is made of plastic. Through the improvements described above, the plastic molding insulation has good leakage prevention performance and good safety performance.

[0018] In some embodiments, one end of the semi-enclosed retaining ring is integrally formed with the motor housing, and the other end of the semi-enclosed retaining ring is separately combined with the motor housing. Through the improvement, the one-piece molding has strong stability, and the split setting is convenient for installation and maintenance.

[0019] Beneficial Effects

[0020] The utility model provides an air compressor with a double-duct motor casing. The double duct arrangement of an outer duct and an inner duct enables the air compression component and the motor component to dissipate heat through a separate heat dissipation duct, thereby improving the heat dissipation efficiency. A semi-enclosed retaining ring is arranged in the motor casing, which can effectively protect the motor component and prevent external particles from affecting the motor component during the process of external cold air passing through the external duct. At the same time, the interval between the stator and the semi-enclosed retaining ring is less than 1 mm, thereby preventing larger external particles from entering the inner duct. When the particles are smaller than 1 mm, the wind force of the fan blades can drive smaller particles to be blown out, thereby preventing the particles from affecting the stator. 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. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0023] Figure 2 It is a schematic diagram of the top view structure of the utility model;

[0024] Figure 3 It is a cross-sectional structural schematic diagram of the utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the fan blade of the utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the semi-enclosed retaining ring and the motor housing of the utility model;

[0027] Figure 6 It is a structural schematic diagram of the motor assembly of the utility model;

[0028] Figure 7 It is a structural schematic diagram of the motor housing of the utility model;

[0029] Figure 8 It is a structural schematic diagram of the semi-enclosed retaining ring of the utility model.

[0030] In the figure: 1. Motor housing; 1.1. External air duct; 1.2. Internal air duct; 1.3. External air inlet; 1.3.1. First air inlet; 1.3.2. Second air inlet; 1.4. Internal air inlet; 2. Crankcase; 3. Motor assembly; 3.1. Stator; 3.2. Coil; 4. Air compression assembly; 5. Fan blades; 6. Semi-enclosed retaining ring; 8. Filter. DETAILED DESCRIPTION

[0031] The present application is described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0033] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0034] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0035] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.

[0036] The technical solutions provided by various embodiments of the present application are described below in conjunction with the accompanying drawings.

[0037] See also Figure 1-4 In this embodiment: an air compressor with a double-duct motor housing includes a motor housing 1 and a crankcase 2 connected to the motor housing 1, a motor assembly 3 is installed in the motor housing 1, a fan blade 5 is installed in the crankcase 2 or the motor housing 1, an air compression assembly 4 is installed in the crankcase 2, an external air duct 1.1 and an internal air duct 1.2 are arranged in the motor housing 1, the motor housing 1 is provided with an external air inlet 1.3 and an internal air inlet 1.4, the two ends of the external air duct 1.1 are respectively connected to the external air inlet 1.3 and the fan blade 5, and the internal air duct 1.2 is connected to the internal air inlet 1.4 and the fan blade 5.

[0038] With the dual air duct setting, when the fan blade 5 rotates, the external cold air is sucked into the external air duct 1.1 through the external air inlet 1.3, thereby achieving heat dissipation for the air compression component 4 in the crankcase 2. At the same time, the external cold air is sucked into the internal air duct 1.2 through the internal air inlet 1.4 to dissipate the heat for the motor component 3, thereby achieving simultaneous heat dissipation for the crankcase 2 and the motor. The dual air duct setting allows the air compression component 4 and the motor component 3 to be cooled through separate cooling ducts, thereby improving the heat dissipation efficiency.

[0039] It should be pointed out that the two ends of the air compressor motor housing 1 are symmetrically arranged.

[0040] In some embodiments, Figure 5-Figure 8 As shown, a half-enclosed retaining ring 6 is provided in the motor housing 1 for protecting the coil 3.2 on the motor assembly 3, the outer air duct 1.1 is provided on the outer side of the half-enclosed retaining ring 6, and the inner air duct 1.2 is provided on the inner side of the half-enclosed retaining ring 6. It should be noted that the setting of the half-enclosed retaining ring 6 can effectively protect the motor assembly 3, and prevent external particles from affecting the motor assembly 3 during the process of external cold air passing through the external air duct 1.1.

[0041] In some embodiments, Figure 3-Figure 6 As shown, the motor assembly 3 includes a stator 3.1, and the distance between the stator 3.1 and the semi-enclosed retaining ring 6 is less than 1 mm. It should be noted that the gap between the stator 3.1 and the semi-enclosed retaining ring 6 is small to prevent larger external particles from entering the inner air duct 1.2. When the particles are smaller than 1 mm, the wind force of the fan blade 5 can drive the smaller particles to be blown out, preventing the particles from affecting the stator 3.1.

[0042] It should be pointed out that the inner air duct 1.2 is formed by the gap structure between the motor assembly 3 and the semi-enclosed retaining ring 6.

[0043] In some embodiments, Figure 7 As shown, the motor housing 1 is integrally formed by aluminum die-casting. It should be noted that the integrally formed motor housing 1 has high stability, high production efficiency and low manufacturing cost through the mold.

[0044] In some embodiments, Figure 8 As shown, the semi-enclosed retaining ring 6 is made of plastic. It should be noted that it has the advantages of light weight, low production cost, good insulation and leakage prevention, and good safety performance.

[0045] In some embodiments, Figure 7 As shown, the external air inlet 1.3 includes a first air inlet 1.3.1 and a second air inlet 1.3.2. The first air inlet 1.3.1 is arranged perpendicular to the central axis of the motor assembly 3, and the second air inlet 1.3.2 is arranged parallel to the central axis of the motor assembly 3. It should be noted that the first air inlet 1.3.1 is arranged perpendicular to the central axis of the motor assembly 3, and the second air inlet 1.3.2 is parallel to the motor assembly 3. The multi-angle air inlets enhance the air intake efficiency of the external air inlet 1.3 and improve the heat dissipation effect of the air compression assembly 4.

[0046] In some embodiments, Figure 7 As shown, the inner air inlet 1.4 is arranged around the central axis of the motor assembly 3. It should be noted that the air intake is more uniform and can dissipate heat to the motor assembly 3 in all directions.

[0047] In some embodiments, Figure 1-Figure 7 As shown, the motor housing 1 is installed with a filter 7, and the filter 7 is arranged at a position corresponding to the inner air inlet 1.4. It should be noted that the arrangement of the filter 7 can better filter the air entering the inner air duct 1.2.

[0048] In some embodiments, Figure 1-Figure 4 As shown, the motor housing 1 is made of plastic. It should be noted that plastic molding has good insulation and anti-leakage performance and good safety performance.

[0049] In some embodiments, Figure 1-Figure 4 As shown, one end of the semi-enclosed retaining ring 6 is integrally formed with the motor housing 1, and the other end of the semi-enclosed retaining ring 6 is separately combined with the motor housing 1. It should be noted that the integral molding has strong stability, and the separate setting is convenient for installation and maintenance.

[0050] Working principle: the motor drives the fan blade 5 to rotate, and negative pressure is formed at the rotating position of the fan blade 5. The external cold air passes through the external air inlet 1.3 and the internal air inlet 1.4, and enters the external air duct 1.1 and the internal air duct 1.2 respectively, while dissipating the heat of the air compressor and the motor assembly 3. The distance between the stator 3.1 and the semi-enclosed retaining ring 6 is less than 1mm to prevent larger external particles from entering the internal air duct 1.2. When the particles are smaller than 1mm, the wind force of the fan blade 5 can drive the smaller particles to be blown out, preventing the particles from affecting the stator 3.1.

[0051] The same and similar parts between the various embodiments in this specification can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0052] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An air compressor with a double air duct motor housing, comprising a motor housing (1) and a crankcase (2) connected to the motor housing (1), a motor assembly (3) being installed in the motor housing (1), a fan blade (5) being installed in the crankcase (2) or the motor housing (1), and an air compression assembly (4) being installed in the crankcase (2), characterized in that: An external air duct (1.1) and an internal air duct (1.2) are arranged in the motor housing (1); the motor housing (1) is provided with an external air inlet (1.3) and an internal air inlet (1.4); two ends of the external air duct (1.1) are respectively connected to the external air inlet (1.3) and the fan blade (5); and the internal air duct (1.2) is connected to the internal air inlet (1.4) and the fan blade (5).

2. The air compressor with a double air duct motor housing according to claim 1, characterized in that: A semi-enclosed retaining ring (6) for protecting the coil (3.2) on the motor assembly (3) is arranged in the motor housing (1); the outer air duct (1.1) is arranged outside the semi-enclosed retaining ring (6); and the inner air duct (1.2) is arranged inside the semi-enclosed retaining ring (6).

3. The air compressor with a double air duct motor housing according to claim 2, characterized in that: The motor assembly (3) comprises a stator (3.1), and the distance between the stator (3.1) and the semi-enclosed retaining ring (6) is less than 1 mm.

4. The air compressor with a double air duct motor housing according to claim 1, characterized in that: The motor housing (1) is integrally formed by aluminum die-casting.

5. The air compressor with a double air duct motor housing according to claim 2, characterized in that: The semi-enclosed retaining ring (6) is made of plastic.

6. The air compressor with a double air duct motor housing according to claim 1, characterized in that: The external air inlet (1.3) comprises a first air inlet (1.3.1) and a second air inlet (1.3.2), wherein the first air inlet (1.3.1) is arranged perpendicular to the central axis of the motor assembly (3), and the second air inlet (1.3.2) is arranged parallel to the central axis of the motor assembly (3).

7. The air compressor with a double air duct motor housing according to claim 1, characterized in that: The inner air inlet (1.4) is arranged around the central axis of the motor assembly (3).

8. The air compressor with a double air duct motor housing according to claim 1, characterized in that: A filter screen (7) is installed on the motor housing (1), and the filter screen (7) is arranged at a position corresponding to the inner air inlet (1.4).

9. The air compressor with a double air duct motor housing according to claim 1, characterized in that: The motor housing (1) is made of plastic.

10. The air compressor with a double air duct motor housing according to claim 2, characterized in that: One end of the semi-enclosed retaining ring (6) is integrally formed with the motor housing (1), and the other end of the semi-enclosed retaining ring (6) is separately assembled with the motor housing (1).

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