Oil baffle cap assembly, rotary compressor and air conditioner

Abstract

The present invention provides an oil baffle cap assembly, which is applied to a rotary compressor and includes a first oil baffle cap, a second oil baffle cap and a gravity member. The second oil baffle cap is of an integral structure. The gravity member is located between the first oil baffle cap and the second oil baffle cap and can move left and right relative to the first oil baffle cap. This oil baffle cap assembly can separate the refrigerant and the refrigerating oil in the upward airflow in the upper cavity of the rotary compressor. The refrigerant is discharged to the exhaust port, and the refrigerating oil is retained in the compressor, reducing the oil content rate of the compressor, achieving the improvement of the heat exchange efficiency of the air conditioner and enhancing the performance of the air conditioner.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and particularly to an oil baffle assembly, a rotary compressor, and an air conditioner. Background Art

[0002] The performance of the air conditioning system in an air conditioner has a great influence on the heat exchange effect of the air conditioning system. To improve the heat exchange efficiency of the air conditioning system, it is mainly necessary to reduce the oil content in the air conditioning circulation system, mainly to reduce the oil content rate of the compressor. Currently, for variable-frequency compressors, the operating frequency is between 10 - 150 Hz. When operating at 10 Hz, due to the slow rotation of the compressor, the oil content rate is low. When operating at a high frequency of 150 Hz, due to the fast rotation of the compressor and the strong oil pumping ability of the pump body, the oil content rate is high, resulting in poor heat exchange effect in the air conditioning circulation and increased work done by the oil circulation. For fixed-frequency compressors, it varies with different power supply specifications. Generally, there are two power supply frequencies, 50 Hz and 60 Hz, and the existing oil baffle cannot well take both into account. This often leads to excessive oil content in the air conditioning system, causing insufficient lubrication of the compressor pump body structure. Seriously, when the air conditioner discharges gas, oil spraying occurs, accompanied by poor heat exchange effect, increased work done by the oil circulation, and low air conditioner energy efficiency. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to avoid the deficiencies in the prior art and provide an oil baffle assembly. This oil baffle assembly can separate the refrigerant and the refrigerating oil in the upward airflow in the upper cavity of the rotary compressor. The refrigerant is discharged towards the exhaust port, and the refrigerating oil is retained in the compressor, reducing the oil content rate of the compressor, achieving the improvement of the air conditioning heat exchange efficiency and the enhancement of the air conditioning performance.

[0004] An embodiment of the present invention provides an oil baffle assembly applied to a rotary compressor, including a first oil baffle, a second oil baffle, and a gravity member. The second oil baffle is an integral structure, and the gravity member is located between the first oil baffle and the second oil baffle and can move left and right relative to the first oil baffle.

[0005] Further, the first oil baffle is sleeved on the second oil baffle, and the second oil baffle is provided with a plurality of limiting blind holes for limiting the position of the gravity member.

[0006] Further, the gravity member satisfies the following mechanical condition: Fa - f - f0 = m * a, where Fa is the force of the centrifugal force F of the gravity member along the inclined surface of the second oil baffle, f is the resolved force of the gravity G of the gravity member along the inclined surface of the second oil baffle, f0 is the frictional force received by the gravity member, m is the mass of the gravity member, and a is the acceleration during the movement process.

[0007] Further, the centrifugal force F of the gravity member satisfies the following condition: F = m * w^2 * R, where w is the rotational acceleration of the rotor, m is the mass of the gravity ball, and R is the distance from the centroid of the gravity member to the axis core of the first oil baffle;

[0008] The force Fa of the centrifugal force F of the gravity member along the inclined surface of the second oil baffle satisfies the following condition: Fa = F * cos(a°), where F is the centrifugal force of the gravity member, and a° is the inclination angle of the second oil baffle;

[0009] The resolved force f of the gravity G of the gravity member along the inclined surface of the second oil baffle satisfies the following condition: f = m * g * sin(a), where m is the mass of the gravity member, g is the acceleration due to gravity, and a° is the inclination angle of the second oil baffle;

[0010] The frictional force f0 of the gravity member satisfies the following condition: f0 = u * FN = u * m * g * cos(a°), where FN is the normal force, u is the coefficient of friction, m is the mass of the gravity member, g is the acceleration due to gravity, and a° is the inclination angle of the second oil baffle.

[0011] Furthermore, the hole shape of the limiting blind hole can be any one of circular, square or rectangular.

[0012] Furthermore, the diameter of the limiting blind hole is 0.4 to 3 times the diameter of the gravity member.

[0013] Furthermore, a connecting groove is provided between two adjacent limiting blind holes.

[0014] Furthermore, the diameter of the first oil baffle is the same as the diameter of the second oil baffle.

[0015] Furthermore, the gravity member is a spherical gravity member, and a plurality of gravity members are provided. A connecting rope for preventing the gravity members from moving and shifting is fixed between two adjacent gravity members.

[0016] An embodiment of the present invention further provides a rotary compressor, including a compressor body, a motor rotor, and the above-mentioned oil baffle assembly. The electronic rotor is fixed in the compressor body, and the oil baffle is fixed on the motor rotor.

[0017] An embodiment of the present invention further provides an air conditioner, including the above-mentioned rotary compressor.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: Since the first oil baffle, the second oil baffle and the gravity member are provided, and the gravity member is arranged between the first baffle and the second baffle, the centrifugal force of the gravity member can be used to overcome the friction and move outward by controlling the speed change of the rotary compressor, and the opening angle of the second oil baffle can be controlled in cooperation with the gravity of the gravity member, so that the refrigerant and the refrigerating oil in the rising air flow in the upper cavity of the rotary compressor are separated. The refrigerant is discharged to the exhaust port, and the refrigerating oil droplets are retained in the compressor, reducing the oil content of the compressor, achieving the improvement of the heat exchange efficiency of the air conditioner and the enhancement of the performance of the air conditioner. Description of the Drawings

[0019] The invention will be further described with reference to the accompanying drawings. However, the embodiments shown in the drawings do not constitute any limitation to the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the following drawings without creative efforts.

[0020] Figure 1 It is a schematic diagram of the overall structure of an oil baffle cap assembly of the present invention.

[0021] Figure 2 It is a cross-sectional view of an oil baffle cap assembly of the present invention.

[0022] Figure 3 It is a top view of an oil baffle cap assembly of the present invention.

[0023] Figure 4 It is a schematic diagram of the overall structure of a rotary compressor of the present invention.

[0024] Figure 5 is Figure 4 an enlarged view of part A in

[0025] The figure includes: compressor body 1, motor rotor 2, oil baffle cap assembly 3, first oil baffle cap 31, second oil baffle cap 32, gravity member 33, and limit blind hole 34. Detailed Embodiments

[0026] The present invention will be further described in conjunction with the following embodiments.

[0027] Embodiment 1: An oil baffle cap assembly.

[0028] As Figures 1-5 shown, an embodiment of the present invention provides an oil baffle cap assembly applied to a rotary compressor, including a first oil baffle cap 31, a second oil baffle cap 32, and a gravity member 33. The first oil baffle cap 31 is sleeved on the second oil baffle cap 32. The second oil baffle cap 32 is of an integral structure. The gravity member 33 is located between the first oil baffle cap 31 and the second oil baffle cap 32 and can move left and right relative to the first oil baffle cap 31. Further, a plurality of limit blind holes 34 for limiting the position of the gravity member 33 are provided on the second oil baffle cap 32. Due to the provision of the first oil baffle cap 31, the second oil baffle cap 32, and the gravity member 33, the centrifugal force of the gravity member 33 can be controlled to overcome friction and move outward by using the rotational speed change of the rotary compressor, and the opening angle of the second oil baffle cap 32 can be controlled in cooperation with the gravity of the gravity member 33, so that the refrigerant and the refrigerating oil in the rising air flow in the upper cavity of the rotary compressor are separated. The refrigerant is discharged to the exhaust port, and the refrigerating oil droplets are retained in the compressor, reducing the oil content of the compressor and achieving the improvement of the heat exchange efficiency of the air conditioner and the enhancement of the air conditioner performance.

[0029] In a preferred embodiment, the gravity member 33 satisfies the following mechanical condition: Fa - f - f0 = m * a, where Fa is the force exerted by the centrifugal force F of the gravity member 33 along the inclined surface of the second oil retaining cap, f is the resolved force of the gravity G of the gravity member 33 along the inclined surface of the second oil retaining cap, f0 is the frictional force received by the gravity member 33, m is the mass of the gravity member 33, and a is the acceleration during the movement. Further, the centrifugal force F of the gravity member 33 satisfies the following condition: F = m * w^2 * R, where w is the rotational acceleration of the rotor, m is the mass of the gravity ball, and R is the distance from the centroid of the gravity member 33 to the axis core of the first oil retaining cap 31;

[0030] The force Fa exerted by the centrifugal force F of the gravity member 33 along the inclined surface of the second oil retaining cap satisfies the following condition: Fa = F * cos(a°), where F is the centrifugal force of the gravity member 33 and a° is the inclination angle of the second oil retaining cap 32;

[0031] The resolved force f of the gravity G of the gravity member 33 along the inclined surface of the second oil retaining cap satisfies the following condition: f = m * g * sin(a), where m is the mass of the gravity member 33, g is the acceleration due to gravity, and a° is the inclination angle of the second oil retaining cap 32;

[0032] The frictional force f0 of the gravity member 33 satisfies the following condition: f0 = u * FN = u * m * g * cos(a°), where FN is the normal force, u is the coefficient of friction, m is the mass of the gravity member 33, g is the acceleration due to gravity, and a° is the inclination angle of the second oil retaining cap 32; where, when the rotational speed remains unchanged, Fa > f0 + f, the gravity member 33 moves outward under the action of the centrifugal force, Fa - f - f0 = m * a°, and the gravity member 33 deflects downward; when the rotational speed changes such that f dominates, Fa < f0 + f, the gravity member 33 decelerates to 0, and when the rotational speed further decreases, the gravity ball moves inward, and the force Fa - f - f0 = m * a°, the inclination of the oil retaining cap 2 increases, and the a° angle increases. By changing the inclination angle of the second oil retaining cap 32, the contact time during the flow of the oil-gas mixture is effectively controlled, the oil content of the compressor is reduced, and at the same time, in cooperation with the limiting blind hole 34 on the oil baffle 2, the micro-movement of the rotation compressor frequency is avoided from affecting the movement of the gravity member 33.

[0033] In a preferred embodiment, the hole shape of the limiting blind hole 34 can be any one of circular, square, or rectangular, improving the diversity of the limiting blind hole 34.

[0034] In a preferred embodiment, the aperture of the limiting blind hole 34 is 0.4 to 3 times the diameter of the gravity member 33. Further, a connecting groove is provided between two adjacent limiting blind holes 34 to ensure that the gravity member 33 does not shift.

[0035] In a preferred embodiment, the diameter of the first oil baffle cap 31 is the same as that of the second oil baffle cap 32, ensuring the oil blocking effect of the first oil baffle cap 31 and the second oil baffle cap 32.

[0036] In a preferred embodiment, the gravity member 33 is a spherical gravity member 33. A plurality of the gravity members 33 are provided, and a connecting rope for preventing the gravity members 33 from moving and shifting is fixed between two adjacent gravity members 33.

[0037] Embodiment 2: A rotary compressor.

[0038] This embodiment provides a rotary compressor, including a compressor body 1, a motor rotor 2, and the above-mentioned oil baffle cap assembly 3. The electronic rotor is fixed inside the compressor body 1, and the oil baffle cap is fixed to the motor rotor 2 by bolts.

[0039] Embodiment 3: An air conditioner.

[0040] This embodiment provides an air conditioner, including the above-mentioned rotary compressor.

[0041] Compared with the prior art, the beneficial effects of the present invention are as follows: Since the first oil baffle cap, the second oil baffle cap, and the gravity member are provided, and the gravity member is arranged between the first baffle and the second baffle, the centrifugal force of the gravity member can be controlled to overcome the friction and move outward by using the rotational speed change of the rotary compressor, and the opening angle of the second oil baffle cap can be controlled in cooperation with the gravity of the gravity member, so that the refrigerant and the refrigerating oil in the upward airflow in the upper cavity of the rotary compressor are separated. The refrigerant is discharged to the exhaust port, and the refrigerating oil droplets are retained in the compressor, reducing the oil content rate of the compressor, achieving the improvement of the heat exchange efficiency of the air conditioner and the enhancement of the air conditioner performance.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. An oil baffle cap assembly, applied to a rotary compressor, characterized in that: It includes a first oil baffle cap, a second oil baffle cap and a gravity member. The second oil baffle cap is of an integral structure. The gravity member is located between the first oil baffle cap and the second oil baffle cap and can move left and right relative to the first oil baffle cap. The centrifugal force of the gravity member is controlled by the speed change of the rotary compressor to overcome the friction and move outward, and the opening angle of the second oil baffle cap is controlled in cooperation with the gravity of the gravity member.

2. The oil baffle cap assembly according to claim 1, characterized in that: The first oil baffle cap is sleeved on the second oil baffle cap, and a plurality of limit blind holes for limiting the position of the gravity member are arranged on the second oil baffle cap.

3. The oil baffle cap assembly according to claim 1, characterized in that: The gravity component satisfies the following mechanical conditions: , where Fa is the force of the centrifugal force F of the gravity component along the inclined surface of the second oil retaining cap, f is the resolved force of the gravity G of the gravity component along the inclined surface of the second oil retaining cap, f0 is the frictional force received by the gravity component, m is the mass of the gravity component, and a is the acceleration during the movement.

4. The oil baffle cap assembly according to claim 1, characterized in that: The centrifugal force F of the gravity member satisfies the following conditions: , where w is the angular velocity of the rotor, m is the mass of the gravity ball, and R is the distance from the centroid of the gravity member to the axis of the first oil retaining cap; The force Fa of the centrifugal force F of the gravity member along the inclined surface of the second oil retaining cap satisfies the following conditions: , where F is the centrifugal force of the gravity member, and a° is the inclination angle of the second oil retaining cap; The decomposition force f of the gravity G of the gravity component along the inclined plane of the second oil retaining cap satisfies the following conditions: , where m is the mass of the gravity component, g is the acceleration due to gravity, and a° is the inclination angle of the second oil retaining cap; The frictional force f0 of the gravity component satisfies the following conditions: , where FN is the normal force, u is the coefficient of friction, m is the mass of the gravity component, g is the acceleration due to gravity, and a° is the inclination angle of the second-stage oil cap.

5. The oil baffle cap assembly according to claim 2, characterized in that: The hole position shape of the limit blind hole is any one of circular, square or rectangular.

6. The oil baffle cap assembly according to claim 2, characterized in that: The aperture of the limit blind hole is 0.4 to 3 times the diameter of the gravity member.

7. The oil baffle cap assembly according to claim 2, characterized in that: A connecting groove is arranged between two adjacent limit blind holes.

8. The oil baffle cap assembly according to claim 1, characterized in that: The gravity member is a spherical gravity member, and a plurality of gravity members are provided. A connecting rope for preventing the gravity member from moving and shifting is fixed between two adjacent gravity members.

9. A rotary compressor, characterized in that: It includes a compressor body, a motor rotor and the oil baffle cap assembly according to any one of claims 1-8. The motor rotor is fixed in the compressor body, and the oil baffle cap is fixed on the motor rotor.

10. An air conditioner, characterized in that: It includes the rotary compressor according to claim 9.

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