Rotor compressor exhaust mechanism, rotor compressor and vehicle-mounted air conditioner

Abstract

The utility model provides an exhaust mechanism of a rotor compressor, which comprises an oil separator and an exhaust connecting pipe, the oil separator comprises an oil separation cavity, an exhaust port is connected with a first interface of the exhaust connecting pipe, or / and a gas outlet of the oil separation cavity is connected with a second interface of the exhaust connecting pipe; the rotor compressor further comprises an overflowing part used for communicating the exhaust connecting pipe with the high-pressure cavity, the ratio of the gap value of the overflowing part or the diameter of the exhaust hole to the exhaust amount of the rotor compressor is a preset value X, and the value range of X is 1 / 6lt. Xlt; 1 / 2. The utility model further provides a rotor compressor and a vehicle-mounted air conditioner. The rotor compressor has the beneficial effects that by arranging the exhaust connecting pipe and the overflowing part, most high-temperature and high-pressure refrigerant gas is exhausted out of the shell of the rotor compressor through the exhaust connecting pipe and the exhaust port, and a small part of high-temperature and high-pressure refrigerant gas is exhausted into the high-pressure cavity through the overflowing part, so that the performance of the compressor is improved, and the service life of the compressor is prolonged. And the operation reliability of the rotor compressor is ensured.

Description

Technical Field

[0001] This utility model relates to the field of rotary compressor technology, and in particular to a rotary compressor exhaust mechanism, a rotary compressor, and a vehicle air conditioner. Background Technology

[0002] Most existing rotary compressors use a partition to divide the cavity inside the casing into a high-pressure chamber and a low-pressure chamber. The motor located in the low-pressure chamber and the pump assembly located in the high-pressure chamber work together to compress the low-temperature, low-pressure refrigerant entering the low-pressure chamber into a high-temperature, high-pressure refrigerant gas. The high-temperature, high-pressure refrigerant gas is discharged into the high-pressure chamber and then discharged into the system through the exhaust port of the high-pressure chamber casing.

[0003] When the temperature inside the high-pressure chamber is high, a temperature gradient will be generated between it and the low-pressure chamber. Heat is transferred to the air inlet of the low-pressure chamber through the partition, causing the temperature of the air inlet and the refrigerant inside to rise. This increases the compressor's energy consumption and reduces its operating efficiency. Utility Model Content

[0004] To address the aforementioned deficiencies, the purpose of this utility model is to provide a rotary compressor exhaust mechanism that can effectively alleviate the high-temperature phenomenon in the high-pressure chamber, reduce the heat transferred to the low-pressure chamber housing, and improve compressor performance.

[0005] This utility model provides a rotary compressor exhaust mechanism, including an oil separator and an exhaust connecting pipe both disposed within the high-pressure chamber of the rotary compressor. The oil separator is connected to a pump assembly disposed within the high-pressure chamber and includes an oil separation chamber for separating oil and refrigerant gas. An exhaust port on the side wall of the high-pressure chamber is connected to a first interface of the exhaust connecting pipe, and / or the gas outlet of the oil separation chamber is connected to a second interface of the exhaust connecting pipe. It also includes a flow passage for connecting the exhaust connecting pipe and the high-pressure chamber. The flow passage includes one of the following: a first gap between the exhaust port and the first interface; a second gap between the gas outlet and the second interface; or an exhaust hole on the exhaust connecting pipe. The ratio of the gap value of the flow passage or the diameter of the exhaust hole to the exhaust volume of the rotary compressor is a predetermined value X, where X ranges from 1 / 6. <X<1 / 2。

[0006] Preferably, the flow passage includes a first gap disposed between the exhaust port and the first interface, the exhaust port and the first interface are clearance fitted, and the gas outlet and the second interface are interference fitted or integrally formed.

[0007] Preferably, the first interface is a straight port or a flared port.

[0008] Preferably, the gap value of the first gap is 1mm to 3mm.

[0009] Preferably, the flow passage includes a second gap disposed between the gas outlet and the second interface, the exhaust port is interference-fitted with the first interface, and the gas outlet is clearance-fitted with the second interface.

[0010] Preferably, the second interface is a straight port or a flared port.

[0011] Preferably, the gap value of the second gap is 1mm to 3mm.

[0012] Preferably, the flow passage includes an exhaust hole formed on the exhaust connection pipe, the exhaust port is interference-fitted with the first interface, and the gas outlet is interference-fitted with the second interface or integrally formed.

[0013] Preferably, the diameter of the vent hole is 2mm to 3mm.

[0014] Preferably, the refrigerant gas is carbon dioxide.

[0015] This utility model also provides a rotary compressor, including the aforementioned rotary compressor exhaust mechanism.

[0016] This utility model also provides a vehicle air conditioner, including a signed rotary compressor.

[0017] The advantages of this invention are that, by setting up an exhaust connecting pipe and a flow passage, most of the high-temperature, high-pressure refrigerant gas is discharged to the outside of the rotor compressor housing through the exhaust connecting pipe and exhaust port, while a small portion of the high-temperature, high-pressure refrigerant gas is discharged into the high-pressure chamber through the flow passage. This reduces heat transfer between the high-pressure chamber housing and the low-pressure chamber housing, improving compressor performance, and also maintains a certain pressure in the high-pressure chamber, ensuring the oil supply effect of the rotor compressor under pressure differential and guaranteeing the reliability of rotor compressor operation. The overall structure is simple and low-cost. Attached Figure Description

[0018] Figure 1 It is a cross-sectional view of a rotary compressor including the exhaust mechanism of Embodiment 1;

[0019] Figure 2 and Figure 3 These are perspective views of the oil separator in Embodiment 1 of the exhaust mechanism from different viewpoints.

[0020] Figure 4 and Figure 5 These are perspective views of exhaust connection pipes with different first interface forms in Embodiment 1 of the exhaust mechanism;

[0021] Figure 6 This is a schematic diagram of the connection structure between the exhaust connecting pipe and the oil separator in Embodiment 1 of the exhaust mechanism;

[0022] Figure 7This is a cross-sectional view of the rotary compressor including the exhaust mechanism of Embodiment 2;

[0023] Figure 8 This is a schematic diagram of the connection structure between the exhaust connecting pipe and the oil separator in Embodiment 2 of the exhaust mechanism;

[0024] Figure 9 This is a schematic diagram of the flow paths of refrigerant gas and oil after separation by the oil separator in Embodiment 2 of the exhaust mechanism;

[0025] Figure 10 This is a cross-sectional view of embodiment three of the exhaust mechanism;

[0026] Figure 11 This is a schematic diagram of the connection structure between the exhaust connecting pipe and the oil separator in Embodiment 3 of the exhaust mechanism;

[0027] Figure 12 This is a schematic diagram of the exhaust connection pipe in Embodiment 3 of the exhaust mechanism;

[0028] Figure 13 This is a schematic diagram of the flow path of refrigerant gas and oil after separation by the oil separator in Embodiment 3 of the exhaust mechanism.

[0029] Component designation explanation:

[0030] 1. Shell

[0031] 11 High-pressure chamber shell

[0032] 111 High-pressure chamber

[0033] 112 Exhaust port

[0034] 12 partitions

[0035] 13 Low-pressure chamber shell

[0036] 131 Low-pressure chamber

[0037] 132 air intake

[0038] 2. Oil separator

[0039] 21 First Shell

[0040] 211 First Entrance

[0041] 22 Second shell

[0042] 221 Second Entrance

[0043] 222 Gas outlet

[0044] 223 Oil Exports

[0045] 23 Third shell

[0046] 3 Pump body assembly

[0047] 4 motors

[0048] 5. Exhaust connection pipe

[0049] 51 First Interface

[0050] 52 Second Interface

[0051] 53 Exhaust port Detailed Implementation

[0052] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate this utility model and are not intended to limit it.

[0053] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0054] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0055] like Figure 1-13 As shown, this utility model provides a rotary compressor, which includes a housing 1, a partition 12, a motor 4, and a pump assembly 3.

[0056] The housing 1 has an internal cavity, and a partition 12 divides the internal cavity of the housing 1 into a low-pressure chamber 131 and a high-pressure chamber 111. Preferably, the housing 1 includes a low-pressure chamber housing 13 and a high-pressure chamber housing 11 arranged horizontally from left to right. Both the low-pressure chamber housing 13 and the high-pressure chamber housing 11 are hollow structures. The partition 12 is disposed between the low-pressure chamber housing 13 and the high-pressure chamber housing 11 and is fixedly connected to both. The low-pressure chamber 131 is formed by the partition 12 and the low-pressure chamber housing 13, and the high-pressure chamber 111 is formed by the partition 12 and the high-pressure chamber housing 11. An oil sump is provided at the bottom of the high-pressure chamber 111.

[0057] The low-pressure chamber housing 13 has an air inlet 132 that communicates with the low-pressure chamber 131. The air inlet 132 is used to introduce low-temperature, low-pressure refrigerant gas into the low-pressure chamber 131. The pump body assembly 3 includes a cylinder located in the high-pressure chamber 111, an upper cylinder head and a lower cylinder head located at both ends of the cylinder, and a crankshaft located at both ends in the low-pressure chamber 131 and the high-pressure chamber 111, respectively. The end of the crankshaft located in the high-pressure chamber 111 has an eccentric part, and the piston of the cylinder is sleeved on the eccentric part. The pump body assembly 3 has an oil suction channel that communicates with the oil sump at one end. The oil suction channel communicates with the low-pressure chamber 131 through the central through hole of the crankshaft. The partition 12 and the cylinder also have air passages that communicate with the low-pressure chamber 131 and the inside of the cylinder, for introducing the low-temperature, low-pressure refrigerant gas in the low-pressure chamber 131 into the inside of the cylinder.

[0058] The motor 4 is located inside the low-pressure chamber 131 and is fixedly mounted on the housing 1 (low-pressure chamber housing 13). The rotor of the motor 4 drives the crankshaft to rotate, compressing the gas inside the cylinder to obtain high-temperature, high-pressure refrigerant gas with increased pressure and temperature. The high-temperature, high-pressure refrigerant gas is discharged into the high-pressure chamber 111 through the outlet on the cylinder. Therefore, the gas pressure in the high-pressure chamber 111 is greater than the gas pressure in the low-pressure chamber 131, forming a pressure difference. The high-pressure chamber housing 11 has an exhaust port 112 connected to the high-pressure chamber 111, which is used to discharge the high-temperature, high-pressure refrigerant gas to the outside of the housing 1.

[0059] The rotary compressor provided by this utility model also includes an exhaust mechanism, which includes an oil separator 2 and an exhaust connecting pipe 5, both disposed within the high-pressure chamber 111 of the rotary compressor. The oil separator 2 is connected to the lower cylinder head of the pump body assembly 3 disposed within the high-pressure chamber 111 and communicates with the air outlet on the cylinder. It includes an oil separation chamber for separating oil and refrigerant gas. An exhaust port 112, opened on the side wall of the high-pressure chamber 111, is connected to the first interface 51 of the exhaust connecting pipe 5, and / or the gas outlet 222 of the oil separation chamber is connected to the second interface 52 of the exhaust connecting pipe 5. In one embodiment of this utility model, the exhaust connecting pipe 5 connects the exhaust port 112 and the gas outlet 222. The oil outlet 223 of the oil separation chamber communicates with the high-pressure chamber 111.

[0060] The exhaust mechanism further includes a flow-through portion for connecting the exhaust connection pipe 5 and the high-pressure chamber 111. The flow-through portion includes one of the following three: a first gap provided between the exhaust port 112 and the first interface 51, a second gap provided between the gas outlet 222 and the second interface 52, and an exhaust hole 53 opened on the exhaust connection pipe 5. The clearance value of the flow-through portion or the diameter of the exhaust hole 53 should not be too large or too small. If the clearance value or the diameter is too large, excessive high-temperature and high-pressure refrigerant gas in the housing 1 will cause a significant heating effect on the housing 1, making it difficult to improve the performance of the rotary compressor. If the clearance value or the diameter is too small, the pressure in the high-pressure chamber 111 will decrease, resulting in a poor differential pressure oil supply effect for the rotary compressor. Therefore, the clearance value of the flow-through portion or the diameter of the exhaust hole 53 needs to be designed according to the exhaust volume of the rotary compressor. In this utility model, the ratio of the clearance value of the flow-through portion or the diameter of the exhaust hole 53 (in mm) to the exhaust volume of the rotary compressor (in cc) is limited to a predetermined value X, and the value range of X is 1 / 6 < X < 1 / 2. Specifically, the refrigerant gas is carbon dioxide.

[0061] In the exhaust mechanism of this utility model, the exhaust connection pipe 5 discharges most of the high-temperature and high-pressure refrigerant gas separated by the oil separator 2 from the exhaust port 112, and a small part of the high-temperature and high-pressure refrigerant gas is discharged into the high-pressure chamber 111 through the flow-through portion. That is, the exhaust connection pipe 5 blocks the direct contact between the high-temperature and high-pressure refrigerant gas and the high-pressure chamber housing 11, avoiding a significant increase in the temperature of the high-pressure chamber housing 11 due to the heating of the high-temperature and high-pressure refrigerant gas, reducing the heat transfer between the high-pressure chamber housing 11 and the low-pressure chamber housing 13, and improving the performance of the rotary compressor. At the same time, the setting of the flow-through portion allows part of the high-temperature and high-pressure refrigerant gas to enter the high-pressure chamber 111 to help maintain a certain pressure in the high-pressure chamber 111. Then, there is a pressure difference between the high-pressure chamber 111 and the low-pressure chamber 131, and there is a pressure difference at both ends of the oil suction channel. The existence of the pressure difference helps the oil suction channel suck the oil in the oil pool into the pump body assembly 3. After lubricating the pump body assembly 3, the oil flows into the low-pressure chamber 131. The oil flowing into the low-pressure chamber 131 returns to the high-pressure chamber 111 and converges to the oil pool along with the gas in the low-pressure chamber 131 through the gas path channel and the oil separator 2. Thus, it realizes continuous oil suction from the oil pool by the oil suction channel to supply lubrication to the pump body assembly 3, ensuring sufficient lubrication of each component during the operation of the rotary compressor, and thus guaranteeing the reliability of the compressor operation.

[0062] Such as Figures 2-3As shown, the oil separator 2 includes a first housing 21 and a second housing 22 that are connected to each other. The first housing defines a first cavity, with one side open to form a first inlet 211, which is connected to the pump assembly 3. The second housing 22 is fixed to the first housing 21 on the side away from the pump assembly 3, and the oil separation cavity is defined within the second housing 22. The oil separation cavity is connected to the first cavity through the second inlet 221. After the refrigerant gas is compressed in the cylinder, it carries a certain amount of oil and is discharged from the cylinder outlet, entering the first cavity through the first inlet 211, and then entering the oil separation cavity through the second inlet 221. Furthermore, the oil separator 2 also includes a third housing 23, which is disposed within the first cavity and defines a third cavity. The end of the lower cylinder head of the pump assembly 3 is sealed within the third cavity. This arrangement prevents the central through-hole of the crankshaft from communicating with the high-pressure chamber 111.

[0063] The gas-liquid separation principle of the oil separation chamber is existing technology and has been described in Chinese utility model patent with authorization announcement number CN218325284U, so it will not be repeated here. The separated refrigerant gas enters the exhaust port 112 through the gas outlet 222 located at the upper end of the oil separation chamber and the exhaust connecting pipe 5, or enters the high-pressure chamber 111 through the flow section; the separated oil is discharged through the oil outlet 223 located at the lower end of the oil separation chamber under the action of gravity and flows into the oil pool in the high-pressure chamber 111.

[0064] The following are three embodiments of the exhaust mechanism of this utility model:

[0065] Example 1 of the exhaust mechanism Figures 1-6 As shown, the flow passage includes a first gap disposed between the exhaust port 112 and the first interface 51. The exhaust port 112 and the first interface 51 are clearance-fitted, and the gap value of the first gap is specifically 1mm to 3mm. The first interface 51 is as follows: Figure 4 The straight opening shown is as follows Figure 5 The flared opening shown; as Figure 6 As shown, the gas outlet 222 and the second interface 52 are either interference-fitted or integrally formed, with no gap between them. Most of the refrigerant gas separated from the oil separation chamber enters the exhaust port 112 through the gas outlet 222 and the exhaust connection pipe 5, while a small portion of the refrigerant gas enters the high-pressure chamber 111 through the first gap.

[0066] Example 2 of the exhaust mechanism Figure 7-9 As shown, the flow passage includes a second gap disposed between the gas outlet 222 and the second interface 52. The gas outlet 222 and the second interface 52 are in clearance fit. Specifically, the gap value of the second gap is 1mm to 3mm. The second interface 52 is as follows: Figure 8The nozzle shown is either a flared or straight opening; the exhaust port 112 is interference-fitted with the first interface 51, with no gap between them. Most of the refrigerant gas separated from the oil separation chamber enters the exhaust port 112 through the gas outlet 222 and the exhaust connecting pipe 5, while a small portion of the refrigerant gas enters the high-pressure chamber 111 through the second gap.

[0067] Example 3 of the exhaust mechanism Figure 10-13 As shown, the flow passage includes an exhaust port 53 on the exhaust connecting pipe 5. The exhaust port 53 is located on the pipe body between the first interface 51 and the second interface 52, and its diameter is specifically 2mm to 3mm. The exhaust port 112 is press-fitted with the first interface 51, and the gas outlet 222 is press-fitted with the second interface 52 or integrally formed. Most of the refrigerant gas separated from the oil separation chamber enters the exhaust port 112 through the gas outlet 222 and the exhaust connecting pipe 5, while a small portion of the refrigerant gas enters the high-pressure chamber 111 through the exhaust port 53.

[0068] This utility model also provides a vehicle air conditioner, including the aforementioned rotary compressor.

[0069] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A rotor compressor exhaust mechanism characterized by, The oil separator is connected with a pump body assembly arranged in the high-pressure cavity, and includes an oil separation cavity for separating oil and refrigerant gas; an exhaust port is arranged on a side wall of the high-pressure cavity and connected with a first interface of the exhaust connection pipe, or / and a gas outlet of the oil separation cavity is connected with a second interface of the exhaust connection pipe; The flow passage further includes a first gap arranged between the exhaust port and the first interface, a second gap arranged between the gas outlet and the second interface, or an exhaust hole arranged on the exhaust connection pipe; a ratio of a gap value of the flow passage or a diameter of the exhaust hole to an exhaust capacity of the rotary compressor is a predetermined value X, and the value X is in a range of 1 / 6X<1 / 2.

2. The rotor compressor exhaust mechanism according to claim 1, wherein The flow passage includes the first gap arranged between the exhaust port and the first interface, the exhaust port is in a gap fit with the first interface, and the gas outlet is in an interference fit with the second interface or is integrally formed.

3. The rotor compressor exhaust mechanism according to claim 2, wherein The first interface is a straight port or a flared port.

4. The rotor compressor unloading mechanism of claim 2, wherein The gap value of the first gap is 1mm-3mm.

5. The rotor compressor unloading mechanism of claim 1, wherein The flow passage includes the second gap arranged between the gas outlet and the second interface, the exhaust port is in an interference fit with the first interface, and the gas outlet is in a gap fit with the second interface.

6. The rotor compressor exhaust mechanism according to claim 5, wherein The second interface is a straight port or a flared port.

7. The rotor compressor exhaust mechanism of claim 5, wherein The gap value of the second gap is 1mm-3mm.

8. The rotor compressor unloading mechanism of claim 1, wherein The flow passage includes the exhaust hole arranged on the exhaust connection pipe, the exhaust port is in an interference fit with the first interface, and the gas outlet is in an interference fit with the second interface or is integrally formed.

9. The rotor compressor exhaust mechanism according to claim 8, wherein The diameter of the exhaust hole is 2mm-3mm.

10. The rotor compressor unloading mechanism of claim 1, wherein The refrigerant gas is carbon dioxide.

11. A rotary compressor characterized by comprising: The rotary compressor exhaust mechanism includes the rotary compressor according to any one of claims 1-10.

12. A vehicle air conditioner characterized by comprising: The rotary compressor includes the rotary compressor exhaust mechanism according to claim 11.

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