Pump components, compressors and air conditioners

Abstract

The invention provides a pump body assembly, a compressor and an air conditioner, including: a cylinder; an oil replenishing port, the oil replenishing port is arranged on the cylinder, a pressure valve assembly is arranged in the oil replenishing port, when the operating pressure ratio of the pump body assembly reaches the preset operating pressure ratio, the pressure valve assembly is turned on, and the oil replenishing port supplies oil to the cylinder. The pump body assembly of the present invention can ensure the lubrication effect of the moving parts of the pump body under high pressure ratio conditions, and improve the reliability of the compressor. Due to the use of the pump body oil supply method of the present invention, the operating range of the rolling rotor compressor is wider. Under the conditions that the pressure ratio reaches 8 or more and the suction pressure is less than 0.3MPa, the compression chamber can still obtain better lubrication conditions, ensuring the reliability of the product under extreme conditions.

Description

Technical Field

[0001] The invention belongs to the technical field of air compression, and in particular relates to a pump body component, a compressor and an air conditioner. Background Art

[0002] At present, the refrigeration compressors for household air conditioners are mainly rolling rotor compressors. The rotating parts in the compression chamber of this type of compressor are mainly lubricated by suction oil. However, when operating under low suction volume conditions, such as low-temperature heating and high pressure ratio, the lubricating oil entering the pump body with the suction is less, and the moving parts such as rollers in the pump body are not fully supplied with oil, which can easily lead to mechanical wear and failure of the compressor. This defect limits the application of rolling rotor compressors in low-temperature system products. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is that insufficient oil supply to the rotor compressor pump body leads to mechanical wear of the compressor, thereby providing a pump body assembly, a compressor and an air conditioner.

[0004] In order to solve the above problems, the present invention provides a pump body assembly, comprising:

[0005] cylinder;

[0006] The oil replenishing port is arranged on the cylinder, and a pressure valve assembly is arranged in the oil replenishing port. When the operating pressure ratio of the pump body assembly reaches the preset operating pressure ratio, the pressure valve assembly is turned on and the oil replenishing port supplies oil to the cylinder.

[0007] The purpose of the present invention and the solution to its technical problems can be further achieved by adopting the following technical measures.

[0008] Preferably, the cylinder is provided with an air intake port, the position of the oil replenishing port corresponds to the position of the air intake port, and the oil replenishing port is connected to the air intake port.

[0009] Preferably, the pump body assembly further comprises a first flange, which is mounted on the first end surface of the cylinder, and an oil replenishing channel is provided on the first flange, and the oil replenishing channel is communicated with the oil replenishing port.

[0010] Preferably, the pressure valve assembly comprises an elastic member and a valve core, and the valve core closes the oil replenishing port under the action of the elastic member.

[0011] Preferably, when the pressure valve assembly is in a closed state, the axial pressure area of ​​the valve core facing the air inlet is S s The axial pressure area of ​​the valve core facing the oil replenishment channel is S d , the suction pressure of the cylinder is P s , the exhaust pressure of the cylinder is P d ,satisfy:

[0012] P s ·S s+k·Δx+m·g≥P d ·S d (1)

[0013] In the above formula (1), m represents the mass of the valve core, g represents the acceleration due to gravity, k represents the elastic coefficient of the elastic member, and Δx represents the initial compression amount of the elastic member.

[0014] Preferably, where 2≤S s / S d ≤4.

[0015] Preferably, 2.74≤S s / S d ≤3.16.

[0016] Preferably, a first valve cavity is provided in the oil replenishing port, a second valve cavity is provided in the oil replenishing channel, the first valve cavity and the second valve cavity form an oil supply valve chamber, the pressure valve assembly is installed in the oil supply valve chamber, the valve core can slide in the oil supply valve chamber, and at least one oil guide groove is provided on the peripheral wall of the oil supply valve chamber.

[0017] Preferably, an elastic member mounting structure is provided at the bottom of the first valve cavity, one end of the elastic member is mounted on the elastic member mounting structure, and the other end is connected to the valve core, and a groove for accommodating the end of the elastic member is provided on the valve core; at least one oil outlet connected to the air intake port is also provided at the bottom of the first valve cavity.

[0018] Preferably, the number of the oil outlets is 3-5, the elastic member mounting structure is arranged at the bottom center of the first valve cavity, and the oil outlets are evenly distributed at the bottom of the first valve cavity around the elastic member mounting structure.

[0019] Preferably, an oil inlet is provided at the bottom of the second valve chamber, and the valve core closes the oil inlet under the action of the elastic member.

[0020] Preferably, the oil inlet is provided with a tapered opening, and the end of the valve core is provided with a tapered sealing portion, and the tapered sealing portion cooperates with the tapered opening.

[0021] Preferably, an oil guide pipe is further provided on the oil inlet, and the oil guide pipe extends outwards along the oil inlet.

[0022] A compressor adopts the above-mentioned pump body assembly.

[0023] An air conditioner adopts the pump body assembly mentioned above.

[0024] The pump assembly, compressor and air conditioner provided by the present invention have at least the following beneficial effects:

[0025] The pump assembly of the present invention can ensure the lubrication effect of the pump moving parts under high pressure ratio conditions and improve the reliability of the compressor. Due to the use of the pump oil supply method of the present invention, the operating range of the rolling rotor compressor is wider. Under the conditions of a pressure ratio of more than 8 and a suction pressure of less than 0.3MPa, the compression chamber can still obtain better lubrication conditions, ensuring the reliability of the product under extreme conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic structural diagram of a pump assembly according to an embodiment of the present invention;

[0027] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0028] Figure 3 A half-section view of a cylinder according to an embodiment of the present invention;

[0029] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0030] Figure 5 A schematic diagram of the valve core structure of an embodiment of the present invention;

[0031] Figure 6 Schematic diagram of the structure of the first flange according to an embodiment of the present invention.

[0032] The reference numerals are as follows:

[0033] 1. Cylinder; 2. Oil replenishing port; 3. Pressure valve assembly; 4. Air intake port; 5. First flange; 6. First end face; 7. Oil replenishing channel; 8. Elastic member; 9. Valve core; 10. First valve cavity; 11. Second valve cavity; 12. Oil supply valve chamber; 13. Elastic member mounting structure; 14. Oil outlet; 15. Oil inlet; 16. Conical opening; 17. Conical sealing portion; 18. Oil guide pipe; 19. Groove; 20. Oil guide groove. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] Combination Figures 1 to 6As shown, a pump body assembly provided by an embodiment of the present invention includes: a cylinder 1; an oil replenishing port 2, the oil replenishing port 2 is arranged on the cylinder 1, and a pressure valve assembly 3 is arranged in the oil replenishing port 2. When the operating pressure ratio of the pump body assembly reaches a preset operating pressure ratio, the pressure valve assembly 3 is turned on, and the oil replenishing port 2 supplies oil to the cylinder 1.

[0036] The pump assembly of the embodiment of the present invention can ensure the lubrication effect of the pump moving parts under high pressure ratio conditions and improve the reliability of the compressor. Due to the use of the pump oil supply method of the present invention, the operating range of the rolling rotor compressor is wider. Under the conditions of a pressure ratio of more than 8 and a suction pressure of less than 0.3MPa, the compression chamber can still obtain good lubrication conditions, ensuring the reliability of the product under extreme conditions.

[0037] In this embodiment, the cylinder 1 is provided with an air intake port 4, the position of the oil replenishing port 2 corresponds to the position of the air intake port 4, and the oil replenishing port 2 is connected to the air intake port 4. When the working pressure ratio reaches the preset pressure ratio, the pressure valve assembly 3 makes the oil replenishing port 2 conductive under the action of the pressure difference, so that the lubricating oil can enter the air intake port 4 through the oil replenishing port 2, and after mixing with the low-pressure refrigerant, enter the compression chamber, thereby achieving more uniform lubrication.

[0038] In this embodiment, in the compressor structure, the lubricating oil often gathers to the bottom of the compressor, that is, the axial lower end of the cylinder, under the action of gravity, to form an oil pool. The pump body assembly also includes a first flange 5, which is installed on the first end face 6 of the cylinder 1. The first flange 5 is provided with an oil replenishing channel 7, which is connected to the oil pool, and the oil replenishing channel 7 is connected to the oil replenishing port 2.

[0039] In this embodiment, the pressure valve assembly 3 includes an elastic member 8 and a valve core 9 . The valve core 9 closes the oil replenishing port 2 under the action of the elastic member 8 .

[0040] In this embodiment, when the pressure valve assembly 3 is in the closed state, the axial pressure area of ​​the valve core 9 facing the air inlet 4 is S s The axial pressure area of ​​the valve core 9 facing the oil replenishment channel 7 is S d , the suction pressure of cylinder 1 is P s , the exhaust pressure of cylinder 1 is P d ,satisfy:

[0041] P s ·S s +k·Δx+m·g≥P d ·S d (1)

[0042] In the above formula (1), m represents the mass of the valve core 9, g represents the acceleration due to gravity, k represents the elastic coefficient of the elastic member 8, and Δx represents the initial compression amount of the elastic member 8.

[0043] In this embodiment, the structure of the valve core 9 should satisfy, 2≤S s / S d ≤4. Better, 2.74≤S s / S d ≤3.16.

[0044] Calculated with an intake pressure of 0.3 MPa and an intake / exhaust pressure ratio of 8, when the valve core 9 material is HT250 and the cross-sectional diameter is 4.5 mm, according to formula (1), the gravity term is infinitesimal relative to other terms and can be ignored. At the same time, the valve core 9 material can be a conventional engineering material with a very small expansion coefficient with temperature changes. Based on the above given conditions, S can be obtained: d ≤1.425mm 2 At this time, the valve core 9 structure is S s / S d ≈3.16.

[0045] Considering that when operating under normal working conditions, the suction volume is sufficient to ensure the suction oil and the oil supply demand in the compression chamber. The suction of excessive lubricating oil will increase the compression power of the pump body and reduce the performance of the compressor. Therefore, the suction oil should not be compensated under all working conditions. By adopting the embodiment of the present invention, it is only necessary to give the working condition that requires oil replenishment to obtain the pin structure. The pin is in a sealed state under the pressure ratio of the oil replenishment condition. When the operating condition reaches the preset working pressure ratio, the sealing surface of the pin opens under the action of the pressure difference force, and the lubricating oil enters the suction port of the pump body through the oil replenishment oil path from the oil pool, and then enters the pump chamber with the suction refrigerant to play a lubricating role.

[0046] In this embodiment, a first valve cavity 10 is provided in the oil replenishing port 2, and a second valve cavity 11 is provided in the oil replenishing channel 7. The first valve cavity 10 and the second valve cavity 11 form an oil supply valve chamber 12. The pressure valve assembly 3 is installed in the oil supply valve chamber 12. The valve core 9 can slide in the oil supply valve chamber 12, and at least one oil guide groove 20 is provided on the peripheral wall of the oil supply valve chamber 12.

[0047] In this embodiment, an elastic member mounting structure 13 is provided at the bottom of the first valve cavity 10, one end of the elastic member 8 is mounted on the elastic member mounting structure 13, and the other end is connected to the valve core 9, and the valve core 9 is provided with a groove 19 for accommodating the end of the elastic member 8; at least one oil outlet 14 connected to the air intake port 4 is also provided at the bottom of the first valve cavity 10. The oil outlet 14 can be crescent-shaped, rectangular, triangular, etc. The number of oil outlets 14 can be 1-8, preferably 3-5, and the elastic member mounting structure 13 is arranged at the bottom center of the first valve cavity 10, and the oil outlets 14 are evenly distributed around the elastic member mounting structure 13 at the bottom of the first valve cavity 10.

[0048] The elastic member mounting structure 13 is a boss structure, and the oil outlet 14 is arranged in the annular groove at the bottom of the first valve cavity 10 .

[0049] In this embodiment, the oil inlet 15 is provided with a tapered opening 16, and the end of the valve core 9 is provided with a tapered sealing portion 17. The tapered sealing portion 17 cooperates with the tapered opening 16. By adjusting the size of the tapered structure, the axial pressure area S of the valve core 9 toward the side of the oil replenishment channel 7 can be adjusted. d Adjustments are made to achieve oil replenishment under the preset operating pressure ratio.

[0050] In this embodiment, an oil inlet 15 is provided at the bottom of the second valve chamber 11, and the valve core 9 closes the oil inlet 15 under the action of the elastic member 8. In this embodiment, an oil guide pipe 18 is also provided on the oil inlet 15, and the oil guide pipe 18 extends outward along the oil inlet 15, and the oil guide pipe 18 can extend into the oil pool to draw oil.

[0051] The pump body assembly of the embodiment of the present invention can still obtain good lubrication conditions in the compression chamber when the pressure ratio reaches 8 or more and the suction pressure is less than 0.3MPa, ensuring the reliability of the product under extreme working conditions. When the preset working conditions are met, oil is replenished to prevent wear of pump body parts and improve reliability; when the preset pressure ratio is not met, oil is not replenished to prevent excessive refrigerant oil from entering the pump chamber, causing liquid hammer and increased power consumption caused by oil compression. The preset working conditions of oil replenishment can be adjusted according to the actual situation by adjusting the structure of the pressure valve assembly, which is highly practical.

[0052] A compressor adopts the above-mentioned pump body assembly.

[0053] An air conditioner adopts the pump body assembly mentioned above.

[0054] It is easy for those skilled in the art to understand that the above-mentioned advantageous methods can be freely combined and superimposed without conflict.

[0055] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A pump assembly, characterized in that: include: Cylinder (1); An oil replenishing port (2), the oil replenishing port (2) being arranged on the cylinder (1), a pressure valve assembly (3) being arranged in the oil replenishing port (2), and when the operating pressure ratio of the pump body assembly reaches a preset operating pressure ratio, the pressure valve assembly (3) is turned on, and the oil replenishing port (2) supplies oil to the cylinder (1); The cylinder (1) is provided with an air intake port (4), the position of the oil replenishing port (2) corresponds to the position of the air intake port (4), the oil replenishing port (2) is connected to the air intake port (4), and when the operating pressure ratio reaches a preset pressure ratio, the pressure valve assembly (3) causes the oil replenishing port (2) to be conductive under the action of the pressure difference.

2. The pump assembly according to claim 1, characterized in that: The pump body assembly further comprises a first flange (5), the first flange (5) being mounted on a first end surface (6) of the cylinder (1), the first flange (5) being provided with an oil replenishing channel (7), the oil replenishing channel (7) being in communication with the oil replenishing port (2).

3. The pump assembly according to claim 2, characterized in that: The pressure valve assembly (3) comprises an elastic member (8) and a valve core (9); the valve core (9) closes the oil replenishing port (2) under the action of the elastic member (8).

4. The pump assembly according to claim 3, characterized in that: When the pressure valve assembly (3) is in a closed state, the axial pressure area of ​​the valve core (9) facing the air inlet (4) is S s The axial pressure area of ​​the valve core (9) facing the oil replenishment channel (7) is S d , the suction pressure of the cylinder (1) is P s , the exhaust pressure of the cylinder (1) is P d ,satisfy: （1） In the above formula (1), m represents the mass of the valve core (9), g represents the acceleration due to gravity, k represents the elastic coefficient of the elastic member (8), and ∆x represents the initial compression amount of the elastic member (8).

5. The pump assembly according to claim 4, characterized in that: in, 2≤S s / S d ≤4。 6. The pump assembly according to claim 5, characterized in that: 2.74≤S s / S d ≤3.16。 7. The pump assembly according to claim 3, characterized in that: A first valve cavity (10) is provided in the oil replenishment port (2), a second valve cavity (11) is provided in the oil replenishment passage (7), the first valve cavity (10) and the second valve cavity (11) enclose an oil supply valve chamber (12), the pressure valve assembly (3) is installed in the oil supply valve chamber (12), the valve core (9) can slide in the oil supply valve chamber (12), and at least one oil guide groove (20) is provided on the peripheral wall of the oil supply valve chamber (12).

8. The pump assembly according to claim 7, characterized in that: An elastic member mounting structure (13) is provided at the bottom of the first valve cavity (10); one end of the elastic member (8) is mounted on the elastic member mounting structure (13), and the other end is connected to the valve core (9); the valve core (9) is provided with a groove (19) for accommodating the end of the elastic member (8); and at least one oil outlet (14) connected to the air intake port (4) is also provided at the bottom of the first valve cavity (10).

9. The pump assembly according to claim 8, characterized in that: The number of the oil outlets (14) is 3-5, the elastic member mounting structure (13) is arranged at the bottom center of the first valve cavity (10), and the oil outlets (14) are evenly distributed around the elastic member mounting structure (13) at the bottom of the first valve cavity (10).

10. The pump assembly according to claim 7, characterized in that: An oil inlet (15) is provided at the bottom of the second valve chamber (11), and the valve core (9) closes the oil inlet (15) under the action of the elastic member (8).

11. The pump assembly according to claim 10, characterized in that: The oil inlet (15) is provided with a tapered opening (16), and the end of the valve core (9) is provided with a tapered sealing portion (17), and the tapered sealing portion (17) cooperates with the tapered opening (16).

12. The pump assembly according to claim 10 or 11, characterized in that: An oil guide pipe (18) is also provided on the oil inlet (15), and the oil guide pipe (18) extends outwards along the oil inlet (15).

13. A compressor, characterized in that: A pump body assembly according to any one of claims 1 to 12 is adopted.

14. An air conditioner, characterized in that: A pump body assembly according to any one of claims 1 to 12 is adopted.

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