A pump body with a built-in drainage structure

Abstract

This invention discloses a pump body with a built-in drainage structure, including a cylinder comprising an upper cylinder, a lower cylinder, a roller crankshaft assembly, and a pump body partition. The cylinder is connected to the roller crankshaft assembly, and the pump body partition separates the upper cylinder and the lower cylinder. A drainage device is provided on the pump body partition. This invention increases the drainage channel area by adding a drainage channel, allowing liquid refrigerant inside the compressor pump body cavity to enter the compressor's drainage cavity through the drainage channel of the partition, thereby reducing or eliminating the risk of valve plate and rivet breakage.

Description

Technical Field

[0001] This invention relates to the technical field of pump body drainage devices, and in particular to a pump body with a built-in drainage structure. Background Technology

[0002] Computer room air conditioning needs to cool year-round. When the outside temperature is lower than the indoor temperature, there are abundant natural cold sources. Making full use of outdoor cold sources can achieve energy conservation and emission reduction.

[0003] When the outdoor temperature is low, the refrigerant in the system is in a liquid state. The low-temperature liquid refrigerant in the outdoor unit needs to be transported to the indoor side. There is no gas compression in the process; it is simply the transport of liquid refrigerant from the low-pressure side to the high-pressure side.

[0004] Currently, centrifugal pumps are mostly used in this type of refrigerant pump air conditioning system, but their cost is high.

[0005] A conventional compressor exhaust structure consists of an exhaust port, an exhaust valve plate, an exhaust baffle, and exhaust rivets. When applied to a refrigerant pump air conditioning system, because liquid refrigerant cannot be further compressed, the resistance to liquid discharge is very large due to the small area of ​​the exhaust port. At the same time, the large flow of liquid refrigerant causes a large impact on the valve plate and baffle, which also increases the risk of valve plate breakage and rivet breakage. Summary of the Invention

[0006] To overcome the aforementioned shortcomings of the prior art, the purpose of this invention is to propose a pump body with a built-in drainage structure. This increases the drainage channel, allowing liquid refrigerant inside the compressor pump body to enter the compressor's drainage cavity through the drainage channel of the partition. This increases the drainage channel area, reducing or eliminating the risk of valve plate and rivet breakage, thereby improving the reliability of the refrigerant pump compressor.

[0007] The technical solution adopted by the present invention to solve its technical problem is: a pump body with a built-in drainage structure, wherein: it includes a cylinder, the cylinder having an upper cylinder, a lower cylinder, a roller crankshaft assembly, and a pump body partition, the cylinder being connected to the roller crankshaft assembly, and the pump body partition separating the upper cylinder and the lower cylinder; the pump body partition is provided with a drainage device.

[0008] As a further improvement of the present invention: the drainage device includes a crescent-shaped drainage hole, which is disposed on the central side of the pump body partition.

[0009] As a further improvement of the present invention: the drainage device further includes a lateral drainage hole, one end of which is opened on the outer circumferential side of the pump body partition.

[0010] As a further improvement of the present invention: the crescent-shaped drainage hole is connected to the side drainage hole to form a drainage channel.

[0011] As a further improvement of the present invention: the roller crankshaft assembly includes rollers and a crankshaft, wherein the crankshaft is connected to the rollers.

[0012] As a further improvement of the present invention: the roller crankshaft assembly includes a slide, the slide being connected to the crankshaft.

[0013] As a further improvement of the present invention: the center of the roller crankshaft assembly and the center of the cylinder are connected by a straight line, and the straight line forms an angle α with the direction of movement of the slide.

[0014] As a further improvement of the present invention: the inner radius of the crescent-shaped drain hole is r, and the inner radius r is greater than the sum of the inner radius of the roller and the chamfer side length of the inner bore of the roller.

[0015] As a further improvement of the present invention, the number of lateral drainage holes is several.

[0016] A pump body with a built-in drainage structure is disclosed, wherein: an annular drainage hole replaces the crescent-shaped drainage hole described above, and the annular drainage hole is located on the central side of the pump body partition. Compared with the prior art, the beneficial effects of the present invention are: it proposes a pump body with a built-in drainage structure, increases the drainage channel, and allows the liquid refrigerant inside the compressor pump body cavity to enter the compressor's drainage cavity through the drainage channel of the partition, thereby increasing the drainage channel area, reducing or eliminating the risk of valve plate and rivet breakage, and thus improving the reliability of the refrigerant pump compressor. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the partition structure of the present invention.

[0019] Figure 3 This is a schematic diagram of the motion state structure of the present invention. Figure 1 .

[0020] Figure 4 This is a schematic diagram of the motion state structure of the present invention. Figure 2 .

[0021] Figure 5 This is a schematic diagram of the motion state structure of the present invention. Figure 3 .

[0022] Figure 6 This is a schematic diagram of the motion state structure of the present invention. Figure 4 .

[0023] The following are the labels in the diagram: 1. Cylinder, 2. Roller, 3. Crankshaft, 4. Pump body partition, 5. Crescent-shaped drain hole, 6. Side drain hole, 7. Sliding vane, 8. Annular drain hole. Detailed Implementation

[0024] The present invention will now be further described with reference to the accompanying drawings and embodiments: A pump body with a built-in drainage structure includes a cylinder 1, the cylinder including an upper cylinder and a lower cylinder, a roller crankshaft assembly, and a pump body partition 4. The cylinder 1 is connected to the roller crankshaft assembly, and the pump body partition 4 separates the upper cylinder and the lower cylinder. The pump body partition 4 is provided with a drainage device.

[0025] The drainage device includes a crescent-shaped drainage hole 5, which is located on the center side of the pump body partition 4.

[0026] The drainage device includes a lateral drainage hole 6, one end of which is open on the outer circumferential side of the pump body partition 4.

[0027] The crescent-shaped drainage hole 5 is connected to the side drainage hole 6 to form a drainage channel.

[0028] The roller crankshaft assembly includes rollers 2 and a crankshaft 3, wherein the crankshaft 3 is connected to the rollers 2.

[0029] The roller crankshaft assembly includes a slide 7, which is connected to the crankshaft 3.

[0030] The center of the roller crankshaft assembly is aligned with the center of the cylinder 1, and the straight line forms an angle α with the direction of movement of the slide 7.

[0031] The inner radius of the crescent-shaped drain hole 5 is r, which is greater than the sum of the inner radius of the roller 2 and the chamfer length of the inner hole.

[0032] The number of the lateral drainage holes 6 is several.

[0033] The drainage device includes an annular drainage hole 8, which is located on the center side of the pump body partition.

[0034] The working principle of this invention: The rotary compressor used in a refrigerant pump air conditioning system, due to the incompressible liquid refrigerant, has high vibration requirements. Therefore, a dual-rotor rotary compressor with superior vibration performance is employed. Conventional structures, due to limited exhaust channel area, cannot achieve timely discharge of large flow rates of refrigerant, resulting in significant impact on the compressor shaft and exhaust structure, severely affecting structural reliability.

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0036] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. In view of the above, this invention proposes a pump body with a built-in drainage structure. This pump body includes a newly designed pump body partition with a drainage hole. This drainage hole is connected to the cavity of the compressor through several through holes that are open to the side, thereby forming a drainage channel.

[0037] Implementation Case 1:

[0038] Combination Figure 1-6 A pump body with a built-in drainage structure includes a cylinder 1, which includes an upper cylinder and a lower cylinder, a roller crankshaft assembly, and a pump body partition 4. The cylinder 1 is connected to the roller crankshaft assembly, and the pump body partition 4 separates the upper cylinder and the lower cylinder. The pump body partition 4 is provided with a drainage device.

[0039] The drainage device includes a crescent-shaped drainage hole 5, which is located on the center side of the pump body partition 4.

[0040] The drainage device includes a lateral drainage hole 6, which is located on the outer circumferential side of the pump body partition 4.

[0041] The crescent-shaped drainage hole 5 is connected to the side drainage hole 6 to form a drainage channel.

[0042] The roller crankshaft assembly includes rollers 2 and a crankshaft 3, wherein the crankshaft 3 is connected to the rollers 2.

[0043] The roller crankshaft assembly includes a slide 7, which is connected to the crankshaft 3.

[0044] The center of the roller crankshaft assembly is aligned with the center of the cylinder 1, and the straight line forms an angle α with the direction of movement of the slide 7.

[0045] The inner radius of the crescent-shaped drain hole 5 is r, which is greater than the sum of the inner radius of the roller 2 and the chamfer length of the inner hole of the roller 2.

[0046] The number of the lateral drainage holes 6 is two.

[0047] Because rotary compressors used in refrigerant pump air conditioning systems have high vibration requirements due to the incompressible liquid refrigerant, a twin-rotor rotary compressor with superior vibration performance is employed. Conventional structures, due to limited exhaust channel area, cannot achieve timely discharge of large flow rates of refrigerant, resulting in significant impacts on the compressor shaft and exhaust structure, severely affecting structural reliability.

[0048] In response to the above, the present invention proposes a pump body with a drainage structure. The newly designed pump body partition 4 is provided with a crescent-shaped drainage hole 5. The crescent-shaped drainage hole 5 is connected to the cavity of the compressor through several through holes connected to the side, thereby forming a drainage channel.

[0049] To meet the requirements and prevent high-pressure liquid refrigerant outside the pump body from entering the drain chamber and causing wasted energy, the inner radius r of the crescent-shaped drain hole 5 on the pump body baffle 4 is greater than (the inner radius of the roller + the chamfer length of the inner edge of the roller).

[0050] Assuming that the line connecting the center of the crankshaft roller assembly and the center of cylinder 1 forms an angle α with the direction of movement of the slide vane 8, the following describes in detail the motion principle of the drainage channel through the motion changes of angle α.

[0051] In the initial state, the crescent-shaped drain hole 5 is covered by the roller 2, and the crescent-shaped drain hole 5 is not connected to the drain chamber, so the liquid refrigerant does not enter the crescent-shaped drain hole 5 and is discharged.

[0052] When the pump is started, as the included angle a increases, the outer circle of roller 2 can no longer cover the crescent-shaped drain hole 5. The drain chamber is connected to the crescent-shaped drain hole 5. The liquid refrigerant enters the two side drain holes of the partition 4 from the crescent-shaped drain hole 5, thereby entering the inner cavity of the compressor, and then enters the air conditioning system through the drain hole.

[0053] As the pump continues to operate, the included angle α continues to increase, and the crescent-shaped drain hole 5 is no longer covered by the roller 2. The crescent-shaped drain hole 5 is completely connected to the drain chamber. At this moment, the flow rate is at its maximum and remains in the maximum open state for a period of time.

[0054] As 'a' continues to increase, after it reaches a certain angle, the outer circle of roller 2 begins to cover the crescent-shaped drain hole 5, and the crescent-shaped drain hole 5 enters the gradual closing stage.

[0055] The crescent-shaped drain hole 5 gradually closes as the angle increases; when the tooth-shaped drain hole 5 is completely covered by the roller 2, the crescent-shaped drain hole 5 is no longer connected to the drain chamber, and the draining ends.

[0056] The crankshaft roller assembly continues to rotate. As roller 2 continues to rotate to its initial state, the crescent-shaped drain hole 5 remains closed throughout this process and does not drain.

[0057] Liquid entering the crescent-shaped drain hole 5 flows into the compressor cavity through the two newly designed side drain holes 6 on the partition, thus achieving the function of draining liquid from the suction end to the discharge end. This process eliminates the need for valve plates and rivet structures, thereby eliminating the risk of valve plate and rivet breakage due to high flow rates.

[0058] Implementation Case 2:

[0059] A pump body with a built-in drainage structure includes a cylinder 1, which includes an upper cylinder and a lower cylinder, a roller crankshaft assembly, and a pump body partition 4. The cylinder 1 is connected to the roller crankshaft assembly, and the pump body partition 4 separates the upper cylinder and the lower cylinder. The pump body partition 4 is provided with a drainage device.

[0060] The drainage device includes an annular drainage hole 8, which is located on the center side of the pump body partition 4.

[0061] The drainage device includes a lateral drainage hole 6, which is located on the outer circumferential side of the pump body partition 4.

[0062] The annular drain hole 8 is connected to the lateral drain hole 6 to form a drain channel.

[0063] The roller crankshaft assembly includes rollers 2 and a crankshaft 3, wherein the crankshaft 3 is connected to the rollers 2.

[0064] The roller crankshaft assembly includes a slide 7, which is connected to the crankshaft 3.

[0065] The center of the roller crankshaft assembly is aligned with the center of the cylinder 1, and the straight line forms an angle α with the direction of movement of the slide 7.

[0066] The inner radius of the annular drain hole 8 is r, which is greater than the sum of the inner radius of the roller 2 and the chamfer length of the inner hole.

[0067] The number of the lateral drainage holes 6 is two.

[0068] Because rotary compressors used in refrigerant pump air conditioning systems have high vibration requirements due to the incompressible liquid refrigerant, a twin-rotor rotary compressor with superior vibration performance is employed. Conventional structures, due to limited exhaust channel area, cannot achieve timely discharge of large flow rates of refrigerant, resulting in significant impacts on the compressor shaft and exhaust structure, severely affecting structural reliability.

[0069] In response to the above, the present invention proposes a pump body with a drainage structure. The newly designed pump body partition 4 is provided with an annular drainage hole 8. The annular drainage hole 8 is connected to the cavity of the compressor through several through holes that are connected to the side, thereby forming a drainage channel.

[0070] To meet the requirements and prevent high-pressure liquid refrigerant outside the pump body from entering the drain chamber and causing wasted energy, the inner radius r of the annular drain hole 8 on the pump body baffle 4 is greater than (the inner radius of the roller + the chamfer length of the inner edge of the roller).

[0071] Assuming that the line connecting the center of the crankshaft roller assembly and the center of cylinder 1 forms an angle α with the direction of movement of the slide vane 8, the following describes in detail the motion principle of the drainage channel through the motion changes of angle α.

[0072] In the initial state, the annular drain hole 8 is covered by the roller, and the crescent drain hole 5 is not connected to the drain chamber, so the liquid refrigerant does not enter the crescent drain hole 5 and is discharged.

[0073] When the pump is started, as the included angle α increases, the outer circle of roller 2 can no longer cover the annular drain hole 8. The drain chamber is connected to the annular drain hole 8. Liquid refrigerant enters the two side holes of the partition 4 from the annular drain hole 8, thereby entering the inner cavity of the compressor, and then enters the air conditioning system through the drain hole.

[0074] As the pump continues to operate, the included angle α continues to increase, and the annular drain hole 8 is no longer covered by the roller 2. The annular drain hole 8 is fully connected to the drain chamber, at which point the flow rate is at its maximum and remains in the maximum open state for a period of time.

[0075] As 'a' continues to increase, after it reaches a certain angle, the outer circle of roller 2 begins to cover the annular drain hole 8, and the annular drain hole 8 enters the gradual closing stage.

[0076] The annular drain hole 8 gradually closes as the angle increases; when the toothed drain hole 5 is completely covered by the roller 2, the annular drain hole 8 is no longer connected to the drain chamber, and the draining ends.

[0077] Implementation Case 3:

[0078] A pump body with a built-in drainage structure includes a cylinder 1, which includes an upper cylinder and a lower cylinder, a roller crankshaft assembly, and a pump body partition 4. The cylinder 1 is connected to the roller crankshaft assembly, and the pump body partition 4 separates the upper cylinder and the lower cylinder. The pump body partition 4 is provided with a drainage device.

[0079] The drainage device includes an annular drainage hole 8, which is located on the center side of the pump body partition 4.

[0080] The drainage device includes a lateral drainage hole 6, which is located on the outside of the pump body partition 4.

[0081] The annular drain hole 8 is connected to the lateral drain hole 6 to form a drain channel.

[0082] The roller crankshaft assembly includes rollers 2 and a crankshaft 3, wherein the crankshaft 3 is connected to the rollers 2.

[0083] The roller crankshaft assembly includes a slide 7, which is connected to the crankshaft 3.

[0084] The center of the roller crankshaft assembly is aligned with the center of the cylinder 1, and the straight line forms an angle α with the direction of movement of the slide 7.

[0085] The inner radius of the annular drain hole 8 is r, which is greater than the sum of the inner radius of the roller 2 and the chamfer side length of the lateral drain hole 6.

[0086] The number of the lateral drainage holes 6 is four.

[0087] Because rotary compressors used in refrigerant pump air conditioning systems have high vibration requirements due to the incompressible liquid refrigerant, a twin-rotor rotary compressor with superior vibration performance is employed. Conventional structures, due to limited exhaust channel area, cannot achieve timely discharge of large flow rates of refrigerant, resulting in significant impacts on the compressor shaft and exhaust structure, severely affecting structural reliability.

[0088] In response to the above, the present invention proposes a pump body with a drainage structure. The newly designed pump body partition 4 is provided with an annular drainage hole 8. The annular drainage hole 8 is connected to the cavity of the compressor through four through holes that are connected to the side, thereby forming a drainage channel.

[0089] To meet the requirements and prevent high-pressure liquid refrigerant outside the pump body from entering the drain chamber and causing wasted energy, the inner radius r of the annular drain hole 8 on the pump body partition 4 is greater than (the inner radius of the roller + the chamfer length of the inner hole).

[0090] Assuming that the line connecting the center of the crankshaft roller assembly and the center of cylinder 1 forms an angle α with the direction of movement of the slide vane 8, the following describes in detail the motion principle of the drainage channel through the motion changes of angle α.

[0091] In the initial state, the annular drain hole 8 is covered by the roller, and the crescent drain hole 5 is not connected to the drain chamber, so the liquid refrigerant does not enter the crescent drain hole 5 and is discharged.

[0092] When the pump is started, as the included angle α increases, the outer circle of roller 2 can no longer cover the annular drain hole 8. The drain chamber is connected to the annular drain hole 8. Liquid refrigerant enters the two side holes of the partition 4 from the annular drain hole 8, thereby entering the inner cavity of the compressor, and then enters the air conditioning system through the drain hole.

[0093] As the pump continues to operate, the included angle α continues to increase, and the annular drain hole 8 is no longer covered by the roller 2. The annular drain hole 8 is fully connected to the drain chamber, at which point the flow rate is at its maximum and remains in the maximum open state for a period of time.

[0094] As 'a' continues to increase, after it reaches a certain angle, the outer circle of roller 2 begins to cover the annular drain hole 8, and the annular drain hole 8 enters the gradual closing stage.

[0095] The annular drain hole 8 gradually closes as the angle increases; when the toothed drain hole 5 is completely covered by the roller 2, the annular drain hole 8 is no longer connected to the drain chamber, and the draining ends.

[0096] The main function of this invention is to provide a pump body with a built-in drainage structure, which increases the drainage channel. The liquid refrigerant inside the compressor pump body cavity enters the compressor's drainage cavity through the drainage channel of the partition, thereby increasing the drainage channel area and reducing or eliminating the risk of valve plate and rivet breakage.

[0097] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. The use of any other shape of drainage hole instead of the crescent-shaped or annular drainage hole of the present invention also falls within the protection scope of the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

[0098] In summary, after reading this invention document, those skilled in the art can make various other corresponding modifications to the technical solutions and concepts based on this invention without creative mental effort, and all of these modifications fall within the scope of protection of this invention.

Claims

1. A pump body with a built-in drainage structure, characterized in that: The device includes a cylinder, which comprises an upper cylinder, a lower cylinder, a roller crankshaft assembly, and a pump body partition. The cylinder is connected to the roller crankshaft assembly, and the pump body partition separates the upper cylinder and the lower cylinder. The pump body partition is equipped with a drainage device. The roller crankshaft assembly includes rollers and a crankshaft, wherein the crankshaft is connected to the rollers; The roller crankshaft assembly includes a sliding vane, which is connected to the crankshaft. The center of the roller crankshaft assembly and the center of the cylinder are connected by a straight line, and the straight line forms an angle α with the direction of movement of the slide plate; The drainage device includes a crescent-shaped drainage hole, which is located on the center side of the pump body partition. The drainage device further includes a lateral drainage hole, one end of which is open on the outer circumferential side of the pump body partition. The crescent-shaped drainage hole is connected to the side drainage hole to form a drainage channel.

2. The pump body with a built-in drainage structure according to claim 1, characterized in that: The inner radius of the crescent-shaped drain hole is r, which is greater than the sum of the inner radius of the roller and the chamfer length of the inner bore.

3. The pump body with a built-in drainage structure according to claim 1, characterized in that: The number of lateral drainage holes is several.

4. The pump body with a built-in drainage structure according to claim 1, characterized in that: An annular drain hole is used instead of the crescent-shaped drain hole, and the annular drain hole is located on the center side of the pump body partition.

Images