Pump body assembly and compressor having it

Abstract

This invention provides a pump assembly and a compressor having the same. The pump assembly includes: a first cylinder assembly including a first cylinder; a second cylinder assembly including a second cylinder; a partition disposed between the first and second cylinder assemblies and including an air passage, first and second exhaust ports, the air passage communicating with the first and second exhaust ports, and the air passage being configured to be switchably connected to a flash evaporator; the first exhaust port communicating with the compression chamber of the first cylinder, and the second exhaust port communicating with the tail end of the second vane groove of the second cylinder; the pump assembly has a first mode and a second mode. When the air passage is connected to the flash evaporator, the first and second cylinders are engaged, and the pump assembly is in the first mode; when the air passage is disconnected from the flash evaporator, the first cylinder is engaged, the second cylinder is not engaged, and the pump assembly is in the second mode. This invention solves the problem of noise generation in existing multi-cylinder compressors when switching from single-cylinder mode to dual-cylinder mode.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and more specifically, to a pump assembly and a compressor having the same. Background Technology

[0002] Currently, dual-cylinder rotary compressors are commonly used in residential multi-split air conditioning systems. Specifically, variable-frequency variable-capacity rotary compressors can adjust their speed according to changes in system load, and when only one indoor unit is running, one cylinder can be unloaded, resulting in a lower minimum cooling capacity provided by the system. This avoids continuous compressor start-stop cycles and improves energy efficiency.

[0003] In existing technology, the method for controlling the cylinder to unload is as follows: the tail cavity of the slide of the unloading cylinder is sealed, and high or low pressure is selectively introduced, causing the slide to follow the roller or disengage from the roller, thereby allowing the cylinder to switch between working mode and unloading mode. However, the above unloading method has the following drawbacks:

[0004] When the compressor is in a low ambient temperature and the compressor switches from single-cylinder mode to dual-cylinder mode, the high-temperature and high-pressure refrigerant enters the vane tail chamber through the variable capacity pipeline. Because the refrigerant is prone to liquefaction in a low-temperature environment, it causes violent pressure fluctuations in the vane tail chamber, and may even cause the vane to fail to follow the roller completely and collide with it, resulting in abnormal noise and affecting the user experience. Summary of the Invention

[0005] The main objective of this invention is to provide a pump assembly and a compressor having the same, in order to solve the problem in the prior art where multi-cylinder compressors tend to generate noise when switching from single-cylinder mode to dual-cylinder mode, which affects the user experience.

[0006] To achieve the above objectives, according to one aspect of the present invention, a pump assembly is provided, comprising: a first cylinder assembly including a first cylinder having a first air inlet, a first inner cavity, and a first vane groove, the first inner cavity having a compression chamber; a second cylinder assembly located below the first cylinder assembly, the second cylinder assembly including a second cylinder having a second air inlet, a second inner cavity, and a second vane groove; a partition disposed between the first cylinder assembly and the second cylinder assembly, the partition including an air passage, a first exhaust port, and a second exhaust port, the air passage communicating with both the first and second exhaust ports, the air passage being configured to be switchably connected to a flash evaporator of the compressor; the first exhaust port communicating with the compression chamber, and the second exhaust port communicating with the tail end of the second vane groove; wherein the pump assembly has a first mode and a second mode, when the air passage is connected to the flash evaporator, both the first and second cylinders are in use, and the pump assembly is in the first mode; when the air passage is disconnected from the flash evaporator, the first cylinder is in use, the second cylinder is not in use, and the pump assembly is in the second mode.

[0007] Furthermore, the first exhaust port is disposed on the plate surface of the partition facing the first cylinder. The partition also includes a first channel, the two ends of which are respectively connected to the air passage and the first exhaust port, and the first channel and the air passage are arranged at an angle.

[0008] Furthermore, the second exhaust port is disposed on the plate surface of the partition facing the second cylinder. The partition also includes a second channel, the two ends of which are respectively connected to the air passage and the second exhaust port. The second channel and the air passage are arranged at an angle. The first channel and the second channel are staggered along the extension direction of the air passage.

[0009] Furthermore, the first cylinder also has a mounting groove and a back pressure channel. The mounting groove is connected to the compression chamber, and the back pressure channel is connected to the compression chamber through the mounting groove. The first cylinder assembly also includes a first adjustment part, which is movably disposed in the mounting groove. The first adjustment part is located between the first exhaust port and the back pressure channel to control the on / off state of the first exhaust port and the compression chamber.

[0010] Furthermore, the back pressure channel includes a third channel and a fourth channel that are interconnected. The third channel and the fourth channel are set at an angle. The fourth channel is connected to the mounting groove through the third channel. The end of the fourth channel away from the third channel penetrates the inner wall of the first inner cavity to communicate with the compression chamber.

[0011] Furthermore, the diameter of the mounting groove is larger than the inner diameter of the fourth channel, and the connection between the mounting groove and the fourth channel has a limiting surface, which is located above the first adjustment part to limit and stop the first adjustment part.

[0012] Furthermore, the second cylinder also has a venting groove that communicates with the tail of the second vane groove, and the second exhaust port communicates with the tail of the second vane groove through the venting groove; wherein, the venting groove is disposed on the surface of the second cylinder facing the partition.

[0013] Furthermore, the second cylinder assembly also includes a sliding vane, which is movably disposed within a second sliding vane groove; the pump body assembly also includes: a structural member located below the second cylinder, the structural member having a mounting cavity; a second adjusting part, which is retractably disposed within the mounting cavity; and an elastic structure disposed within the mounting cavity for applying an elastic force to the second adjusting part to move toward one side of the sliding vane; wherein, a receiving recess is provided on the side of the sliding vane facing the structural member, and when the gas passage is in communication with the flash evaporator, the refrigerant entering the tail of the second sliding vane groove pushes the second adjusting part back into the mounting cavity; when the gas passage is disconnected from the flash evaporator, at least a portion of the second adjusting part extends into the receiving recess and engages with the receiving recess for limiting cooperation.

[0014] According to another aspect of the present invention, a compressor is provided, including a pump body assembly, an exhaust pipe, a control valve, a first pipeline, and a flash evaporator; the exhaust pipe is connected to the exhaust port of the pump body assembly, and the flash evaporator is connected to the gas passage of the pump body assembly through the first pipeline; the control valve is disposed on the first pipeline for controlling the on / off state of the first pipeline or the flow rate or velocity of the medium-pressure refrigerant in the first pipeline; wherein, the pump body assembly is the aforementioned pump body assembly.

[0015] Furthermore, the compressor also includes: a second pipeline, through which the exhaust pipe is connected to the flash evaporator; a condenser, disposed on the second pipeline; a distributor, connected to the air inlet of the pump body assembly; a third pipeline, through which the distributor is connected to the flash evaporator; and an evaporator, disposed on the third pipeline.

[0016] Furthermore, the compressor also includes: a first throttle valve, which is installed on the second pipeline; and a second throttle valve, which is installed on the third pipeline.

[0017] Furthermore, the compressor also includes: a temperature detection device for detecting the temperature of the environment in which the compressor is located; and a control module electrically connected to both the temperature detection device and the control valve; wherein, when the temperature detection value of the temperature detection device is less than or equal to a preset temperature value, the control module controls the control valve to be in an open state.

[0018] According to the technical solution of this invention, the pump assembly includes a first cylinder assembly, a second cylinder assembly, and a partition. The first cylinder assembly includes a first cylinder, which has a first air inlet, a first inner cavity, and a first vane groove. The first inner cavity has a compression chamber. The second cylinder assembly is located below the first cylinder assembly and includes a second cylinder, which has a second air inlet, a second inner cavity, and a second vane groove. The partition is disposed between the first cylinder assembly and the second cylinder assembly. The partition includes an air passage, a first exhaust port, and a second exhaust port. The air passage communicates with both the first and second exhaust ports and is configurably connected to the flash evaporator of the compressor. The first exhaust port communicates with the compression chamber, and the second exhaust port communicates with the tail end of the second vane groove. Thus, the pump assembly has a first mode and a second mode. When the gas passage is connected to the flash evaporator, a portion of the refrigerant entering the gas passage enters the compression chamber of the first cylinder through the first exhaust port to replenish the first cylinder and discharge the refrigerant in a timely manner. The other portion enters the tail of the second vane groove of the second cylinder through the second exhaust port to apply pressure to the vane installed in the second vane groove and ensure that the vane moves with the roller, ensuring that the second cylinder can operate normally. At this time, both the first and second cylinders are in use, and the pump assembly is in the first mode. When the gas passage is disconnected from the flash evaporator, the refrigerant buffered in the gas passage continues to replenish the compression chamber of the first cylinder through the first exhaust port until the intermediate pressure gradually decreases to the same as the low suction pressure. At this time, the first cylinder is in use, the second cylinder is not in use, and the pump assembly is in the second mode. During the process of switching the pump body assembly from the second mode to the first mode, the air passage continuously replenishes the compression chamber of the first cylinder, thereby timely discharging the refrigerant. This avoids the abnormal noise problem caused by the long-term drastic pressure change in the tail of the second vane groove, and solves the problem in the prior art that the multi-cylinder compressor is prone to generating noise when switching from single-cylinder mode to dual-cylinder mode, which affects the user experience. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0020] Figure 1 A cross-sectional view of an embodiment of the pump body assembly according to the present invention is shown;

[0021] Figure 2 It shows Figure 1 A three-dimensional structural diagram of the baffle plate of the pump body assembly;

[0022] Figure 3 It shows Figure 1 Exploded view of the first cylinder assembly of the pump body component;

[0023] Figure 4 It shows Figure 1 A cross-sectional view of the first cylinder assembly of the pump body assembly after it is assembled with the partition plate.

[0024] Figure 5 It shows Figure 1 Exploded view of the second cylinder assembly of the pump body component after assembly with the partition plate;

[0025] Figure 6 It shows Figure 1 An enlarged schematic diagram of point A when the pump body assembly is in the first mode;

[0026] Figure 7 It shows Figure 4 Enlarged schematic diagram of point B of the pump body assembly in the first mode;

[0027] Figure 8 It shows Figure 1 A magnified schematic diagram of point A of the pump body assembly in the second mode;

[0028] Figure 9 It shows Figure 1 Enlarged schematic diagram of point B of the pump body assembly in the second mode;

[0029] Figure 10 A schematic diagram of an embodiment of the compressor according to the present invention is shown.

[0030] The above figures include the following reference numerals:

[0031] 10. First cylinder assembly; 11. First cylinder; 111. First inner cavity; 112. First sliding vane groove; 113. Mounting groove; 114. Back pressure channel; 1141. Third channel; 1142. Fourth channel; 12. First adjustment part;

[0032] 20. Second cylinder assembly; 21. Second cylinder; 211. Second inner cavity; 212. Second slide groove; 213. Vent groove; 22. Slide; 221. Receiving recess;

[0033] 30. Partition; 31. Air passage; 32. First exhaust port; 33. Second exhaust port; 34. First channel; 35. Second channel;

[0034] 40. Structural component; 41. Mounting cavity; 50. Second adjustment part; 60. Elastic structure; 100. Pump body assembly; 110. Exhaust pipe; 120. Control valve; 130. First pipeline; 140. Flash evaporator; 150. Second pipeline; 160. Condenser; 170. Distributor; 180. Third pipeline; 190. Evaporator; 200. First throttle valve; 210. Second throttle valve; 220. Suction pipe; 230. Roller. Detailed Implementation

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0037] In this invention, unless otherwise stated, directional terms such as "up" and "down" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" are generally used in relation to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0038] To address the problem in the prior art that multi-cylinder compressors tend to generate noise when switching from single-cylinder mode to dual-cylinder mode, thus affecting the user experience, this application provides a pump body assembly and a compressor having the same assembly.

[0039] like Figures 1 to 9As shown, the pump assembly includes a first cylinder assembly 10, a second cylinder assembly 20, and a partition 30. The first cylinder assembly 10 includes a first cylinder 11, which has a first air inlet, a first inner cavity 111, and a first vane groove 112. The first inner cavity 111 has a compression chamber. The second cylinder assembly 20 is located below the first cylinder assembly 10 and includes a second cylinder 21, which has a second air inlet, a second inner cavity 211, and a second vane groove 212. The partition 30 is disposed between the first cylinder assembly 10 and the second cylinder assembly 20. The partition 30 includes an air passage 31, a first exhaust port 32, and a second exhaust port 33. The air passage 31 communicates with both the first and second exhaust ports 32 and 33. The air passage 31 is configurably connected to the flash evaporator 140 of the compressor. The first exhaust port 32 communicates with the compression chamber, and the second exhaust port 33 communicates with the tail end of the second vane groove 212. The pump assembly has a first mode and a second mode. When the gas passage 31 is connected to the flash evaporator 140, both the first cylinder 11 and the second cylinder 21 are in use, and the pump assembly is in the first mode. When the gas passage 31 is disconnected from the flash evaporator 140, the first cylinder 11 is in use and the second cylinder 21 is not in use, and the pump assembly is in the second mode.

[0040] Applying the technical solution of this embodiment, the pump assembly has a first mode and a second mode. When the gas passage 31 is connected to the flash evaporator 140, a portion of the refrigerant entering the gas passage 31 enters the compression chamber of the first cylinder 11 through the first exhaust port 32 to replenish the first cylinder 11 and discharge the refrigerant in a timely manner. The other portion enters the tail of the second vane groove 212 of the second cylinder 21 through the second exhaust port 33 to apply pressure to the vane 22 installed in the second vane groove 212 and ensure that the vane 22 is secure. As the roller 230 moves, it ensures that the second cylinder 21 can operate normally. At this time, both the first cylinder 11 and the second cylinder 21 are in use, and the pump assembly is in the first mode. When the gas passage 31 is disconnected from the flash evaporator 140, the refrigerant buffered in the gas passage 31 continuously replenishes the compression chamber of the first cylinder 11 through the first exhaust port 32 until the intermediate pressure gradually decreases to the same level as the low suction pressure. At this time, the first cylinder 11 is in use, the second cylinder 21 is not in use, and the pump assembly is in the second mode. During the process of the pump assembly switching from the second mode to the first mode, because the gas passage 31 continuously replenishes the compression chamber of the first cylinder 11, the refrigerant is discharged in time, thereby avoiding the abnormal noise problem caused by the long-term drastic pressure change in the tail of the second vane groove 212. This solves the problem in the prior art that multi-cylinder compressors are prone to generating noise when switching from single-cylinder mode to dual-cylinder mode, which affects the user experience.

[0041] In this embodiment, the pump body assembly is a dual-cylinder assembly. It should be noted that the number of cylinders in the pump body assembly is not limited to this and can be adjusted according to operating conditions and usage requirements.

[0042] In this embodiment, the second cylinder 21 is an unloadable cylinder, and the tail of the second sliding groove 212 is a sealed cavity.

[0043] like Figure 2 , Figure 4 as well as Figure 7 As shown, the first exhaust port 32 is disposed on the plate surface of the partition 30 facing the first cylinder 11, and the partition 30 also includes a first channel 34. The two ends of the first channel 34 are respectively connected to the air passage 31 and the first exhaust port 32, and the first channel 34 and the air passage 31 are arranged at an angle. In this way, the above-mentioned arrangement of the first channel 34 can effectively guide the flow direction of the refrigerant, reduce flow resistance, improve the refrigerant transfer efficiency between the first cylinder assembly 10 and the second cylinder assembly 20, and improve the heat exchange efficiency and operational stability of the compressor.

[0044] Optionally, the first channel 34 and the air passage 31 are arranged perpendicular to each other.

[0045] like Figure 2 , Figure 4 as well as Figure 7 As shown, the second exhaust port 33 is disposed on the plate surface of the partition 30 facing the second cylinder 21. The partition 30 also includes a second channel 35, the two ends of which are connected to the through-flow channel 31 and the second exhaust port 33, respectively. The second channel 35 and the through-flow channel 31 are arranged at an angle. The first channel 34 and the second channel 35 are staggered along the extension direction of the through-flow channel 31. This staggered arrangement of the first channel 34 and the second channel 35 avoids mutual interference of the refrigerant during transmission, ensuring stable refrigerant flow. Simultaneously, the aforementioned arrangement of the second channel 35 effectively guides the flow direction of the refrigerant, reduces flow resistance, improves the transmission efficiency of the refrigerant between the first cylinder assembly 10 and the second cylinder assembly 20, and improves the heat exchange efficiency and operational stability of the compressor.

[0046] Optionally, the second channel 35 and the air passage 31 are arranged perpendicular to each other.

[0047] like Figure 3 , Figure 4 as well as Figure 7As shown, the first cylinder 11 also has a mounting groove 113 and a back pressure channel 114. The mounting groove 113 communicates with the compression chamber, and the back pressure channel 114 communicates with the compression chamber through the mounting groove 113. The first cylinder assembly 10 also includes a first adjustment part 12, which is movably disposed in the mounting groove 113. The first adjustment part 12 is located between the first exhaust port 32 and the back pressure channel 114 to control the on / off state of the first exhaust port 32 and the compression chamber. In this way, by controlling the on / off state of the first exhaust port 32 and the compression chamber through the first adjustment part 12, automatic air replenishment to the first cylinder 11 can be achieved, thereby improving the automation level of the pump assembly and reducing the labor intensity of the workers.

[0048] Specifically, after the refrigerant enters the first exhaust port 32, if the pushing force exerted by the refrigerant on the first adjustment part 12 is greater than the combined force of the weight of the first adjustment part 12 and the pressure in the compression chamber, then the first exhaust port 32 is connected to the compression chamber through the mounting groove 113, and air can be replenished into the compression chamber at this time; if the pushing force exerted by the refrigerant on the first adjustment part 12 is less than or equal to the combined force of the weight of the first adjustment part 12 and the pressure in the compression chamber, then the first exhaust port 32 is connected to the back pressure channel 114, and air is no longer replenished into the compression chamber of the first cylinder 11, so as to realize the automatic air replenishment of the pump body assembly and reduce the labor intensity of the workers.

[0049] like Figure 4 and Figure 7 As shown, the back pressure channel 114 includes a third channel 1141 and a fourth channel 1142 that are interconnected. The third channel 1141 and the fourth channel 1142 are arranged at an angle. The fourth channel 1142 is connected to the mounting groove 113 through the third channel 1141. The end of the fourth channel 1142 away from the third channel 1141 penetrates the inner wall of the first inner cavity 111 to communicate with the compression cavity. This arrangement effectively reduces energy loss of the refrigerant during the gas replenishment process, improves gas replenishment efficiency, and makes the refrigerant flow more smoothly within the back pressure channel 114. At the same time, this arrangement simplifies the structure of the back pressure channel 114, making it easier to manufacture and implement, and reducing the manufacturing cost and difficulty of the pump body assembly.

[0050] In this embodiment, the diameter of the mounting groove 113 is larger than the inner diameter of the fourth channel 1142. A limiting surface is located at the connection between the mounting groove 113 and the fourth channel 1142, positioned above the first adjustment part 12 to limit and stop its movement. This limiting surface ensures the accuracy of the first adjustment part 12 when adjusting the air supply, preventing over- or under-supply. Furthermore, the limiting surface limits the maximum height of the first adjustment part 12, ensuring that its movement is confined within a specific height range.

[0051] like Figure 5As shown, the second cylinder 21 also has a venting groove 213 that communicates with the tail of the second vane groove 212, and the second exhaust port 33 communicates with the tail of the second vane groove 212 through the venting groove 213; wherein, the venting groove 213 is disposed on the surface of the second cylinder 21 facing the partition plate 30. In this way, the above-mentioned arrangement of the venting groove 213 further improves the reliability of the communication between the second exhaust port 33 and the tail of the second vane groove 212, thereby increasing the number of working modes of the pump body assembly, thus meeting different user needs and improving the user experience.

[0052] like Figure 6 and Figure 8 As shown, the second cylinder assembly 20 also includes a sliding vane 22, which is movably disposed within the second sliding vane groove 212; the pump body assembly also includes a structural member 40, a second adjusting portion 50, and an elastic structure 60. The structural member 40 is located below the second cylinder 21 and has a mounting cavity 41. The second adjusting portion 50 is retractably disposed within the mounting cavity 41. The elastic structure 60 is disposed within the mounting cavity 41 to apply an elastic force to the second adjusting portion 50 toward the sliding vane 22. The sliding vane 22 has a receiving recess 221 on its side facing the structural member 40. When the gas passage 31 is connected to the flash evaporator 140, the refrigerant entering the tail of the second sliding vane groove 212 pushes the second adjusting portion 50 back into the mounting cavity 41; when the gas passage 31 is disconnected from the flash evaporator 140, at least a portion of the second adjusting portion 50 extends into the receiving recess 221 and engages with the receiving recess 221. In this way, the above configuration ensures that when the pump body assembly is in the first mode, the second exhaust port 33 is connected to the tail of the second vane groove 212; when the pump body assembly is in the second mode, the second exhaust port 33 is not connected to the tail of the second vane groove 212, thereby improving the operational reliability of the pump body assembly.

[0053] In this embodiment, structural component 40 is a lower flange. When the air passage 31 is connected to the flash evaporator 140, the medium-pressure refrigerant entering the second exhaust port 33 enters the tail of the second sliding vane groove 212 through the vent groove 213. The pressure on the upper end of the second adjusting part 50 can overcome its own weight and elastic force, so that the medium-pressure refrigerant pushes the second adjusting part 50 down and back into the mounting cavity 41. At this time, the medium-pressure refrigerant pushes the sliding vane 22 to fit against the roller 230 so as to follow the roller 23. 0 movement, at this time the pump body assembly is in the first mode (dual cylinder mode); when the gas passage 31 is disconnected from the flash evaporator 140, the tail of the second vane groove 212 no longer enters the medium-pressure refrigerant, the second adjustment part 50 rises under the action of elastic force until it enters the receiving recess 221 and is limited to cooperate with the receiving recess 221. At this time, the vane 22 is limited and does not move with the roller 230, the second cylinder assembly 20 is not put into use, and the pump body assembly is in the second mode (single cylinder mode).

[0054] like Figure 1 As shown, this application also provides a compressor, including a pump body assembly 100, an exhaust pipe 110, a control valve 120, a first pipeline 130, and a flash evaporator 140; the exhaust pipe 110 is connected to the exhaust port of the pump body assembly 100, and the flash evaporator 140 is connected to the gas passage 31 of the pump body assembly 100 through the first pipeline 130; the control valve 120 is disposed on the first pipeline 130 to control the on / off state of the first pipeline 130 or the flow rate or velocity of the medium-pressure refrigerant in the first pipeline 130. The pump body assembly 100 is the aforementioned pump body assembly.

[0055] In this embodiment, the compressor can automatically adjust the refrigerant circulation path according to different working modes, which improves the overall performance of the compressor. During the process of the pump body assembly 100 switching from the second mode to the first mode, the gas passage 31 continuously replenishes the compression chamber of the first cylinder 11, thereby timely discharging the refrigerant. This avoids the abnormal noise problem caused by the long-term drastic pressure change in the tail of the second vane groove 212, and solves the problem in the prior art that the multi-cylinder compressor is prone to generating noise when switching from single-cylinder mode to dual-cylinder mode, which affects the user experience.

[0056] Optionally, the control valve 120 is a solenoid valve. By controlling the working state of the solenoid valve, the operating mode of the pump body assembly can be directly controlled, thereby reducing the difficulty of operation for the staff.

[0057] like Figure 1 As shown, the compressor also includes a second pipeline 150, a condenser 160, a distributor 170, a third pipeline 180, and an evaporator 190. The discharge pipe 110 is connected to the flash evaporator 140 via the second pipeline 150, and the condenser 160 is mounted on the second pipeline 150. The distributor 170 is connected to the air inlet of the pump body assembly 100. The distributor 170 is connected to the flash evaporator 140 via the third pipeline 180. The evaporator 190 is mounted on the third pipeline 180.

[0058] Specifically, the aforementioned piping design ensures efficient refrigerant circulation between the compressor and flash evaporator 140, improving the overall performance of the compressor. In practical applications, this efficient refrigerant circulation not only improves heat exchange efficiency and reduces system energy consumption, but also enhances the system's environmental friendliness and safety.

[0059] like Figure 1 As shown, the compressor also includes a first throttle valve 200 and a second throttle valve 210. The first throttle valve 200 is located on the second pipeline 150, and the second throttle valve 210 is located on the third pipeline 180. This arrangement of the first throttle valve 200 and the second throttle valve 210 allows for precise control of the refrigerant flow and pressure according to different operating requirements, improving the compressor's operating efficiency and stability.

[0060] In this embodiment, the high-pressure refrigerant discharged through the exhaust pipe 110 enters the condenser 160, and after being throttled by the first throttling valve 200, it enters the flash evaporator 140 to form medium-pressure refrigerant. The medium-pressure refrigerant then enters the evaporator 190 for heat exchange after passing through the second throttling valve 210 to form low-pressure refrigerant, and then re-enters the compressor through the suction pipe 220 for circulation. The medium-pressure refrigerant formed in the flash evaporator 140 is then introduced into the gas passage 31 through the control valve 120.

[0061] Optionally, the compressor also includes a temperature detection device and a control module. The temperature detection device is used to detect the temperature of the environment in which the compressor operates. The control module is electrically connected to both the temperature detection device and the control valve 120. Specifically, when the temperature detected by the temperature detection device is less than or equal to a preset temperature value, the control module controls the control valve 120 to be in the open state. Thus, the above-described configuration of the temperature detection device and control module enables the compressor to automatically adjust its operating mode according to the ambient temperature, improving heating efficiency in low-temperature environments and making it suitable for various applications requiring automatic adjustment based on ambient temperature.

[0062] In this embodiment, the aforementioned intelligent temperature control enables the compressor to automatically adjust under different seasons and weather conditions without manual intervention. Especially in low-temperature winter environments, it can automatically increase heating power to ensure comfortable indoor temperatures, providing users with a more intelligent and convenient user experience.

[0063] Alternatively, the compressor may be a vertical compressor or a horizontal compressor.

[0064] In this embodiment, the compressor has two operating modes:

[0065] like Figure 7 As shown, when the control valve 120 is open, the compressor is in dual-cylinder mode. On one hand, medium-pressure refrigerant continuously enters the tail of the second vane groove 212 of the second cylinder 21 through the second exhaust port 33. The head of the second adjustment part 50 is at medium pressure and the tail is at low pressure. The second adjustment part 50 is subjected to a force (downward) toward the side away from the vane 22, so that the second adjustment part 50 is completely disengaged from the vane 22. At the same time, the vane 22 is subjected to a force close to the roller 230 and reciprocates with the roller 230. The second cylinder assembly 20 is in working state. On the other hand, the first exhaust port 32 is connected to the compression chamber of the first cylinder 11. During the operation of the compressor, the refrigerant pressure inside it gradually increases from the low suction pressure to the intermediate pressure and the high exhaust pressure. After the high pressure refrigerant is discharged, it is re-inhaled to complete a cycle. The first exhaust port 32 is always at the intermediate pressure. Therefore, during the process of the pressure in the compression chamber of the first cylinder 11 increasing from the low pressure to the intermediate pressure, the first adjustment part 12 is subjected to a force that moves towards the side away from the partition 30. The intermediate pressure refrigerant is replenished to the compression chamber of the first cylinder 11 through the back pressure channel 114.

[0066] like Figure 8 As shown, when control valve 120 is closed, the compressor is in single-cylinder mode. Because the medium-pressure refrigerant in the gas passage 31 continuously supplies gas to the compression chamber of the first cylinder 11, until the refrigerant pressure in the gas passage 31 gradually decreases to be comparable to the low suction pressure, the first adjusting part 12 adheres tightly to the partition 30 and stops supplying gas. At this time, both the head and tail of the second adjusting part 50 are at low pressure. The second adjusting part 50 moves upward under the action of the spring force, thereby locking the sliding plate 22 in the second sliding plate groove 212. The sliding plate 22 disengages from the roller 230, and the second cylinder assembly 20 is in an unloaded state.

[0067] Specifically, in harsh winter conditions, the compressor switches from single-cylinder mode to dual-cylinder mode. The medium-pressure refrigerant in the vent 301 continuously supplies gas to the first cylinder 11, thus promptly discharging the refrigerant and preventing abnormal noise from the tail cavity of the second vane slot 212 caused by prolonged and drastic pressure changes. Furthermore, compared to existing compressors, the compressor in this application only requires controlling the opening and closing of a control valve (solenoid valve) to switch between single and dual-cylinder modes, simplifying the external piping for this switching process.

[0068] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0069] The pump assembly includes a first cylinder assembly, a second cylinder assembly, and a partition. The first cylinder assembly includes a first cylinder, which has a first air inlet, a first inner cavity, and a first vane groove. The first inner cavity has a compression chamber. The second cylinder assembly is located below the first cylinder assembly and includes a second cylinder, which has a second air inlet, a second inner cavity, and a second vane groove. The partition is disposed between the first and second cylinder assemblies and includes an air passage, a first exhaust port, and a second exhaust port. The air passage communicates with both the first and second exhaust ports and is configurably connected to the flash evaporator of the compressor. The first exhaust port communicates with the compression chamber, and the second exhaust port communicates with the tail end of the second vane groove. Thus, the pump assembly has a first mode and a second mode. When the gas passage is connected to the flash evaporator, a portion of the refrigerant entering the gas passage enters the compression chamber of the first cylinder through the first exhaust port to replenish the first cylinder and discharge the refrigerant in a timely manner. The other portion enters the tail of the second vane groove of the second cylinder through the second exhaust port to apply pressure to the vane installed in the second vane groove and ensure that the vane moves with the roller, ensuring that the second cylinder can operate normally. At this time, both the first and second cylinders are in use, and the pump assembly is in the first mode. When the gas passage is disconnected from the flash evaporator, the refrigerant buffered in the gas passage continues to replenish the compression chamber of the first cylinder through the first exhaust port until the intermediate pressure gradually decreases to the same as the low suction pressure. At this time, the first cylinder is in use, the second cylinder is not in use, and the pump assembly is in the second mode. During the process of switching the pump body assembly from the second mode to the first mode, the air passage continuously replenishes the compression chamber of the first cylinder, thereby timely discharging the refrigerant. This avoids the abnormal noise problem caused by the long-term drastic pressure change in the tail of the second vane groove, and solves the problem in the prior art that the multi-cylinder compressor is prone to generating noise when switching from single-cylinder mode to dual-cylinder mode, which affects the user experience.

[0070] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0071] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0072] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0073] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A pump body assembly, characterized in that, include: The first cylinder assembly (10) includes a first cylinder (11), the first cylinder (11) having a first air intake, a first inner cavity (111) and a first vane groove (112), the first inner cavity (111) having a compression chamber; The second cylinder assembly (20) is located below the first cylinder assembly (10). The second cylinder assembly (20) includes a second cylinder (21), which has a second air intake, a second inner cavity (211), and a second vane groove (212). A partition (30) is disposed between the first cylinder assembly (10) and the second cylinder assembly (20). The partition (30) includes an air passage (31), a first exhaust port (32), and a second exhaust port (33). The air passage (31) is connected to both the first exhaust port (32) and the second exhaust port (33). The air passage (31) is connected to the flash evaporator of the compressor. The first exhaust port (32) is connected to the compression chamber, and the second exhaust port (33) is connected to the tail end of the second vane groove (212). The pump assembly has a first mode and a second mode. When the gas passage (31) is connected to the flash evaporator (140), both the first cylinder (11) and the second cylinder (21) are in use, and the pump assembly is in the first mode. When the gas passage (31) is disconnected from the flash evaporator (140), the first cylinder (11) is in use and the second cylinder (21) is not in use, and the pump assembly is in the second mode.

2. The pump body assembly according to claim 1, characterized in that, The first exhaust port (32) is disposed on the plate surface of the partition (30) facing the first cylinder (11), and the partition (30) further includes: The first channel (34) is connected to the air passage (31) and the first exhaust port (32) at its two ends respectively, and the first channel (34) and the air passage (31) are arranged at an angle.

3. The pump body assembly according to claim 2, characterized in that, The second exhaust port (33) is disposed on the plate surface of the partition (30) facing the second cylinder (21), and the partition (30) further includes: The second channel (35) is connected to the air passage (31) and the second exhaust port (33) at both ends, respectively, and the second channel (35) and the air passage (31) are arranged at an angle. Along the extension direction of the air passage (31), the first passage (34) and the second passage (35) are staggered.

4. The pump body assembly according to claim 1, characterized in that, The first cylinder (11) also has a mounting groove (113) and a back pressure channel (114), the mounting groove (113) communicating with the compression chamber, and the back pressure channel (114) communicating with the compression chamber through the mounting groove (113); the first cylinder assembly (10) further includes: A first adjustment part (12) is movably disposed in the mounting groove (113). The first adjustment part (12) is located between the first exhaust hole (32) and the back pressure channel (114) to control the on / off state of the first exhaust hole (32) and the compression chamber.

5. The pump body assembly according to claim 4, characterized in that, The back pressure channel (114) includes a third channel (1141) and a fourth channel (1142) that are interconnected. The third channel (1141) and the fourth channel (1142) are arranged at an angle. The fourth channel (1142) is connected to the mounting groove (113) through the third channel (1141). The end of the fourth channel (1142) away from the third channel (1141) passes through the inner wall of the first inner cavity (111) to communicate with the compression cavity.

6. The pump body assembly according to claim 5, characterized in that, The diameter of the mounting groove (113) is larger than the inner diameter of the fourth channel (1142). The connection between the mounting groove (113) and the fourth channel (1142) has a limiting surface. The limiting surface is located above the first adjustment part (12) to limit and stop the first adjustment part (12).

7. The pump body assembly according to claim 1, characterized in that, The second cylinder (21) also has a venting groove (213) communicating with the tail of the second vane groove (212), and the second exhaust port (33) is communicating with the tail of the second vane groove (212) through the venting groove (213); wherein the venting groove (213) is disposed on the surface of the second cylinder (21) facing the partition (30).

8. The pump body assembly according to claim 1, characterized in that, The second cylinder assembly (20) further includes a sliding vane (22), which is movably disposed within the second sliding vane groove (212); the pump body assembly further includes: A structural component (40) is located below the second cylinder (21), and the structural component (40) has a mounting cavity (41); The second adjustment part (50) is retractably disposed within the mounting cavity (41); An elastic structure (60) is disposed in the mounting cavity (41) to apply an elastic force to the second adjustment part (50) to move toward the slide (22); The slide plate (22) has a receiving recess (221) on its side facing the structural member (40). When the air passage (31) is connected to the flash evaporator (140), the refrigerant entering the tail of the second slide plate groove (212) pushes the second adjustment part (50) back into the mounting cavity (41). When the air passage (31) is disconnected from the flash evaporator (140), at least a portion of the second adjustment part (50) extends into the receiving recess (221) and is limited and engaged with the receiving recess (221).

9. A compressor, characterized in that, The system includes a pump assembly (100), an exhaust pipe (110), a control valve (120), a first pipeline (130), and a flash evaporator (140); the exhaust pipe (110) is connected to the exhaust port of the pump assembly (100), and the flash evaporator (140) is connected to the air passage (31) of the pump assembly (100) through the first pipeline (130); the control valve (120) is disposed on the first pipeline (130) to control the on / off state of the first pipeline (130) or the flow rate or velocity of the medium-pressure refrigerant in the first pipeline (130); wherein, the pump assembly (100) is the pump assembly according to any one of claims 1 to 8.

10. The compressor according to claim 9, characterized in that, The compressor also includes: The second pipeline (150) is connected to the flash evaporator (140) through the exhaust pipe (110); A condenser (160) is installed on the second pipe (150); The separator (170) is connected to the air inlet of the pump body assembly (100); The third pipeline (180) connects the distributor (170) to the flash evaporator (140). An evaporator (190) is installed on the third pipe (180).

11. The compressor according to claim 10, characterized in that, The compressor also includes: The first throttle valve (200) is installed on the second pipeline (150); The second throttle valve (210) is installed on the third pipeline (180).

12. The compressor according to claim 9, characterized in that, The compressor also includes: A temperature detection device is used to detect the temperature of the environment in which the compressor is located; The control module is electrically connected to both the temperature detection device and the control valve (120); When the temperature detection value of the temperature detection device is less than or equal to the preset temperature value, the control module controls the control valve (120) to be in the open state.

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