Portable refrigerator compressor

Abstract

The utility model discloses a portable refrigerator compressor, which relates to the technical field of compressors and comprises a rotor, a cylinder body, a gas hood, a motor, an upper flange and a lower flange which are arranged in a shell, an oil pool is arranged in the shell, and lubricating oil is placed in the oil pool; the rotor is driven by the motor; the rotor is arranged in a cylinder body sleeve connected with the cylinder body, and the two ends of the cylinder body are fixedly sealed by the lower flange and the upper flange through bolts; the gas hood covers the upper flange in a sealing manner; the rotor is provided with a central hole and a radial hole, and a spiral sheet is fixedly arranged in the central hole; mutually communicated exhaust holes are formed in the cylinder body, the gas hood, the lower flange and the upper flange, and an oil return hole communicated with a cavity of the gas hood and a central hole of the rotor is formed in the upper flange. The portable refrigerator compressor can solve the problem that an existing portable refrigerator compressor cannot achieve vertical / horizontal installation compatibility and stable operation in a mobile scene.

Description

TECHNICAL FIELD

[0001] The utility model relates to refrigeration equipment technical field especially portable refrigerator compressor which can realize efficient oil return in vertical or horizontal working posture and ensure stable operation of compressor during movement. BACKGROUND

[0002] The compressor of the conventional portable refrigerator is usually designed for lubrication system only for single installation mode (vertical or horizontal), which results in its inability to be compatible with multiple working posture scenarios. For vertical compressor: in vertical working posture, oil pump formed by rotor and spiral piece in central hole realizes oil supply to lubricate corresponding parts of compressor, but in horizontal working posture, lubricating oil is prone to accumulate at the bottom of cylinder body, which cannot be effectively supplied to lubrication points, resulting in wear and failure of related components. For horizontal compressor: in horizontal working posture, oil pump and oil passage supply oil to lubrication parts of compressor, but in vertical working posture, lubrication effect is reduced or even fails, which eventually leads to wear and failure of equipment. The existing portable refrigerator is prone to wear and failure due to insufficient lubrication during movement (such as inclination and vibration of vehicle-mounted refrigerator). SUMMARY

[0003] The utility model provides a kind of portable refrigerator compressor, it can solve the problem that the existing portable refrigerator compressor cannot realize vertical / horizontal installation compatibility and stable operation in mobile scenario.

[0004] To solve the above problems, the technical scheme of the utility model is as follows: this portable refrigerator compressor includes a rotor, a cylinder body, a gas cover, a motor, a lower flange and an upper flange arranged in the shell. An oil pool is arranged in the shell at one end of the cylinder body, and lubricating oil is placed in the oil pool. The rotor is driven by the motor. The rotor is arranged in a cylinder body sleeve connected to the cylinder body (5). The cylinder body is sealed by the lower flange and the upper flange through bolts at both ends. The gas cover is capped on the upper flange. The rotor has a central hole and a radial hole, and the rotor has a spiral piece. The rotor, the lower flange and the upper flange have radial holes that are connected to each other. The upper flange has an oil return hole that is connected to the cavity of the gas cover and the central hole of the rotor.

[0005] When the compressor is in vertical installation mode, the lubricating oil in the oil pool is located in the lower end of the shell below the rotor. When the rotor rotates, the spiral piece sucks the lubricating oil in the oil pool into the central hole. The lubricating oil rises to the top of the rotor along the spiral piece and is thrown out of the radial hole under the action of centrifugal force, thereby lubricating the rotor, the lower flange, the cylinder body and the upper flange.

[0006] When the compressor is in the horizontal installation mode, the lubricating oil mixed with compressed gas enters the cavity surrounded by the upper flange and the gas cover through the exhaust hole of the upper flange; the lubricating oil is deposited at the bottom of the cavity surrounded by the upper flange and the gas cover; under the action of the exhaust pressure difference, the lubricating oil flows into the central hole of the rotor through the oil return hole, lubricates the rotor, the lower flange, the cylinder body and the upper flange through the central hole and the radial holes distributed on the rotor.

[0007] In the technical scheme, more specifically, the motor is a permanent magnet brushless direct current motor, and the terminal post is connected to the shell.

[0008] Further, the cylinder body is fixed and sealed at both ends by the lower flange and the upper flange through bolts.

[0009] Further, the gas cover is fixed on the upper flange by bolts.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] 1. The utility model adopts a double-mode self-adaptive lubrication: compatible with vertical / horizontal installation, without additional adjustment of the oil circuit.

[0012] 2. The utility model has high reliability: the forced oil pumping by the spiral piece is combined with the pressure difference oil supply after oil-gas separation, avoiding lubrication failure caused by installation angle or vibration.

[0013] 3. The utility model has a simplified structure: the traditional oil pump or complex oil passage is cancelled, reducing the cost and facilitating maintenance.

[0014] 4. The utility model is suitable for mobile scenarios: when the compressor is inclined or vibrates, the spiral piece continuously pumps oil (vertical mode) or provides oil after oil-gas separation (horizontal mode), ensuring uninterrupted lubrication, thus meeting the stable cooling demand in mobile environments such as vehicle-mounted and outdoor environments. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a vertical state structure schematic diagram of the utility model;

[0016] Figure 2 is a horizontal state structure schematic diagram of the utility model.

[0017] The reference numerals in the figure represent: 1, spiral piece, 2, rotor, 3, shell, 4, lower flange, 5, cylinder body, 6, upper flange, 7, gas cover, 8, motor, 9, exhaust hole, 10, lubricating oil, 11, oil return hole. DETAILED DESCRIPTION

[0018] The utility model is further explained in detail below in combination with the drawings and examples:

[0019] Figure 1 And Figure 2 The portable refrigerator compressor, which comprises a rotor 2, a cylinder body 5, a gas cover 7, a motor 8, a lower flange 4 and an upper flange 6 arranged in a shell 3.

[0020] The cylinder body 5 and one end of the rotor 2 are provided with an oil pool in the shell 3, and lubricating oil 10 is placed in the oil pool. The rotor 2 is driven by the motor 8, the motor 8 adopts a permanent magnet brushless direct current motor, and a through connection post is connected with the shell outside; the middle and lower sections of the rotor 2 are arranged in a cylinder sleeve connected with the cylinder body 5, the cylinder body 5 is fixed and sealed at both ends by the lower flange 4 and the upper flange 6 through bolts; the gas cover 7 is fixed and sealed on the upper flange 6 through bolts; the rotor 2 is provided with a central hole and a radial hole, and the rotor 2 is provided with a spiral blade 1; the rotor 2, the lower flange 4 and the upper flange 6 are provided with radial holes in communication with each other; the upper flange 6 is provided with an oil return hole 11 in communication with the cavity of the gas cover 7 and the central hole of the rotor 2.

[0021] As shown in Figure 1 When the compressor is in the vertical installation mode, the lubricating oil in the oil pool is located in the lower end of the shell 3 below the rotor. When the rotor 2 rotates, the spiral blade 1 sucks the lubricating oil 10 in the oil pool into the central hole, the lubricating oil rises to the top of the rotor along the spiral blade 1, is thrown out from the radial hole under the action of centrifugal force, and lubricates the rotor, the lower flange, the cylinder body, the upper flange and other components, and the oil flow path is shown by arrows in the figure.

[0022] As shown in Figure 2 When the compressor is in the horizontal or working mode, the lubricating oil mixes with the compressed gas and enters the cavity surrounded by the upper flange 6 and the gas cover 7 through the exhaust hole of the upper flange 6; the lubricating oil 10 is deposited at the bottom of the volume cavity formed by the upper flange 6 and the gas cover 7. Under the action of the exhaust pressure difference, the lubricating oil flows into the central hole of the rotor through the oil return hole, lubricates the rotor and the cylinder sleeve, the rotor and the bearings at both ends, the flange part and other parts through the central hole and the radial holes distributed on the rotor, and the oil flow path is shown by arrows in the figure.

[0023] When the compressor is inclined or vibrated, the spiral blade continuously sucks the oil (in the vertical mode) or the oil return hole continuously provides the oil separated from the front end of the oil gas under the action of the pressure difference (in the horizontal mode), so that the lubrication is ensured to be uninterrupted.

[0024] The utility model adopts the double mode self-adaptive lubrication, is compatible with vertical / horizontal installation, and does not need additional adjustment of the oil circuit. It has high reliability: the spiral blade forcibly sucks oil and oil gas separation, and the pressure difference oil supply lubrication is combined, so that the lubrication failure caused by the installation angle or vibration is avoided. The structure is simplified: the traditional oil pump or complex oil channel is cancelled, the cost is reduced, and maintenance is facilitated. It is suitable for mobile scenes: stable refrigeration requirements in mobile environments such as vehicle-mounted and outdoor environments are met.

Claims

1. A portable refrigerator compressor, comprising a rotor (2), a cylinder (5), a gas shroud (7), a motor (8), a lower flange (4), and an upper flange (6) disposed within a housing (3), characterized in that: An oil sump is provided in the housing (3) at one end of the cylinder (5), and lubricating oil (10) is placed in the oil sump; the rotor (2) is driven by the motor (8); the rotor (2) is located in the cylinder sleeve connected to the cylinder (5), and the two ends of the cylinder (5) are fixed and sealed by the lower flange (4) and the upper flange (6) by bolts; the air cover (7) covers the upper flange (6); the rotor (2) has a central hole and a radial hole, and a spiral blade (1) is provided on the rotor (2); the lower flange (4) and the upper flange (6) have radial holes that communicate with the radial hole of the central hole of the rotor (2); the upper flange (6) has an oil return hole (11) that communicates with the cavity of the air cover (7) and the central hole of the rotor (2); When the compressor is in vertical installation mode, the lubricating oil in the oil sump is located in the lower end of the housing (3) below the rotor; when the rotor (2) rotates, the spiral blade (1) draws the lubricating oil in the oil sump into the central hole, and the lubricating oil rises along the spiral blade (1) to the top of the rotor, and is thrown out from the radial hole by centrifugal force, thereby lubricating the rotor (2), the lower flange (4), the cylinder (5) and the upper flange (6); When the compressor is in horizontal installation mode, the lubricating oil mixed with compressed gas enters the cavity formed by the upper flange (6) and the gas cover (7); the lubricating oil is deposited at the bottom of the cavity formed by the upper flange (6) and the gas cover (7); under the pressure difference that the exhaust pressure is higher than the pressure of other parts, the lubricating oil flows into the center hole of the rotor (2) through the oil return hole (11), and under the action of exhaust pressure difference and centrifugal force, it lubricates the rotor (2), the lower flange (4), the cylinder (5) and the upper flange (6) through the center hole and the radial holes distributed on the rotor.

2. The portable refrigerator compressor according to claim 1, characterized in that: The motor (8) is a permanent magnet brushless DC motor, and the connecting terminal is connected to the outside of the housing.

3. The portable refrigerator compressor according to claim 1 or 2, characterized in that: The cylinder body (5) is sealed at both ends by bolts through the lower flange (4) and the upper flange (6).

4. The portable refrigerator compressor according to claim 3, characterized in that: The gas cover (7) is fixed to the upper flange (6) by bolts.

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