Cylinder assembly, compressor and heat pump air conditioner

Abstract

The utility model relates to a cylinder assembly, compressor and heat pump air conditioner, the cylinder assembly includes: cylinder body, be provided with compression cavity in the cylinder body, the roller rotatablely set in the compression cavity, the roller will compression cavity is divided into low pressure chamber and high pressure chamber, the air supplement channel is set up on the lateral wall of cylinder body, the air supplement channel has air supplement import and air supplement export, air supplement import penetrates the lateral wall of cylinder body, air supplement import is used to communicate with the air supplement component of compressor, air supplement export communicates with high pressure chamber, sets up the switch subassembly at air supplement export, the switch subassembly is used for opening or closing air supplement export, this application separates oil pool and compression cavity through the air supplement channel, avoids cylinder body to be heated after the oil pool and conduction to low pressure chamber with heat, thereby avoids the low temperature low pressure refrigerant of low pressure chamber to be heated expansion, reduces the loss of suction volumetric efficiency, improves heating capacity.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and more specifically, to cylinder assemblies, compressors, and heat pump air conditioners. Background Technology

[0002] Heat pump air conditioners are widely used in cold regions. In conventional heat pump air conditioners, the evaporation temperature decreases as the ambient temperature drops. However, heat pump air conditioners require higher temperatures to operate in very low ambient temperatures, resulting in reduced heating performance and insufficient heating capacity, which fails to meet user needs. At the same time, an excessively high compression ratio can cause the compressor exhaust temperature to be too high, thereby reducing the viscosity of the lubricating oil, aggravating the wear of compressor parts, and reducing the compressor's lifespan. When the exhaust temperature exceeds 115°C, there is a possibility of burning out the motor.

[0003] In existing technologies, the compressor of a heat pump air conditioner with intermediate gas injection technology is like... Figure 1 and Figure 2 As shown, heat pump air conditioners with intermediate gas injection technology can operate stably under large temperature difference conditions, effectively improving problems such as excessive compression ratio, reduced heating capacity, excessively high exhaust temperature, and poor reliability in low-temperature environments. However, when heat pump air conditioners produce higher temperatures in very low ambient temperatures, their heating capacity decreases, and the excessively high compression ratio leads to high compressor exhaust temperature and poor reliability. Existing heat pump air conditioners with intermediate gas injection technology have limited improvement effects with single-cylinder, single-stage gas injection structures, while multi-cylinder, multi-stage gas injection structures offer better improvement but suffer from high costs and complex assembly processes. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a cylinder assembly, compressor, and heat pump air conditioner. By isolating the oil sump and compression chamber through the air supply channel, the heat from the cylinder being heated by the oil sump is prevented from being conducted to the low-pressure chamber, thereby preventing the low-temperature, low-pressure refrigerant in the low-pressure chamber from being heated and expanding, reducing the loss of suction volume efficiency, and improving heating capacity.

[0005] In a first aspect, this utility model provides a cylinder assembly, comprising:

[0006] A cylinder body, wherein a compression chamber is provided within the cylinder body;

[0007] A roller, rotatably disposed within the compression chamber, divides the compression chamber into a low-pressure chamber and a high-pressure chamber;

[0008] An air supply channel is provided on the side wall of the cylinder body. The air supply channel has an air supply inlet and an air supply outlet. The air supply inlet penetrates the side wall of the cylinder body and is connected to the air supply component of the compressor. The air supply outlet is connected to the high-pressure chamber. A switch assembly is provided at the air supply outlet to control the opening or closing of the air supply outlet.

[0009] Specifically, the cylinder has an intake port that connects to the low-pressure chamber. During compressor operation, as the rollers rotate, low-temperature, low-pressure refrigerant enters the low-pressure chamber through the intake port. The fluid in the high-pressure chamber is compressed, causing pressure changes between the high-pressure and low-pressure chambers. Meanwhile, medium-temperature, medium-pressure refrigerant from the compressor's gas supply component is introduced into the gas supply channel through the gas supply inlet. Because the oil sump temperature is higher than the temperature of the medium-temperature, medium-pressure refrigerant, the refrigerant absorbs heat through contact with the cylinder and oil sump within the gas supply channel. This heat absorption increases the pressure of the medium-temperature, medium-pressure refrigerant. When the pressure in the gas supply channel exceeds the pressure in the high-pressure chamber, the switching assembly opens, allowing the medium-temperature, medium-pressure refrigerant to enter the high-pressure chamber and supply gas. When the pressure in the high-pressure chamber exceeds the pressure in the gas supply channel, the switching assembly closes, completing the gas supply to the high-pressure chamber.

[0010] By setting a gas injection channel on the side wall of the cylinder block, the oil sump and compression chamber are isolated, preventing the cylinder block from being heated by the oil sump and transferring heat to the low-pressure chamber. This avoids the low-temperature, low-pressure refrigerant in the low-pressure chamber from expanding due to heating, reducing suction volumetric efficiency loss and improving heating capacity. Furthermore, by supplying the gas injection channel with medium-temperature, medium-pressure refrigerant output from the compressor's gas injection components, the refrigerant absorbs heat from the cylinder wall and oil sump, lowering the oil sump temperature, increasing the viscosity of the lubricating oil in the oil sump, mitigating wear on compressor parts, and further improving compressor reliability. Moreover, using a medium-temperature, medium-pressure refrigerant as the gas injection gas, with its higher pressure, allows it to exceed the high-pressure chamber pressure after absorbing heat from the cylinder block and oil sump, thus enabling higher gas injection efficiency.

[0011] Optionally, the switching assembly includes:

[0012] A valve seat is disposed at the air supply outlet. The valve seat has a first opening and a second opening. The first opening faces the air supply channel, and the second opening faces the high-pressure chamber.

[0013] A valve body, which is movably connected to the valve seat, is used to block the first opening;

[0014] An elastic element is provided, one end of which is disposed on the valve seat, and the other end of which abuts against the valve body. The valve body blocks the first opening under the elastic force of the elastic element, and the valve body opens the first opening under the fluid pressure in the air supply channel.

[0015] Specifically, when the pressure in the gas replenishment channel is greater than the pressure in the high-pressure chamber, the medium-temperature and medium-pressure refrigerant in the gas replenishment channel pushes the valve body to move towards the second opening, causing the valve body to separate from the valve seat. The elastic element is compressed, and the first opening on the valve seat loses the sealing effect of the valve body. The first opening and the second opening are connected, and the medium-temperature and medium-pressure refrigerant can enter the high-pressure chamber through the first opening and the second opening to complete the gas replenishment of the high-pressure chamber.

[0016] After the high-pressure chamber is replenished with air, the pressure inside the high-pressure chamber increases as the rotor rotates. When the pressure in the replenishment air channel is less than the pressure in the high-pressure chamber, the elastic element resets and pushes the valve body to move toward the first opening, thus sealing the first opening. At this time, the replenishment air channel is isolated from the high-pressure chamber by the valve body, preventing fluid in the high-pressure chamber from entering the replenishment air channel.

[0017] Optionally, the gas replenishment channel includes:

[0018] The first connection channel, wherein the air inlet is disposed on the first connection channel;

[0019] The second connection channel has one end connected to the first connection channel, the air supply outlet is located at the other end of the second connection channel, and the switch assembly is located inside the second connection channel.

[0020] Specifically, when replenishing gas into the high-pressure chamber, the medium-temperature and medium-pressure refrigerant enters the first connecting channel through the gas replenishment inlet. In the first connecting channel, it exchanges heat with the cylinder wall and oil sump of the cylinder block, and after absorbing heat, it enters the second connecting channel, pushing the switching component in the second connecting channel so that the medium-temperature and medium-pressure refrigerant can enter the high-pressure chamber.

[0021] Optionally, the first connection channel is an arc-shaped channel.

[0022] Specifically, the first connecting channel of the arc-shaped channel can increase the contact area between the air supply channel and the cylinder side wall, making the distance between the air supply channel and the outer wall of the cylinder smaller, allowing the fluid in the air supply channel to absorb more heat and improving the efficiency of heat exchange.

[0023] Optionally, the first connection channel is located on the outer wall of the cylinder.

[0024] Specifically, placing the first connecting channel on the outer wall of the cylinder can reduce the distance between the first connecting channel and the oil sump, thereby improving the heat exchange capacity and insulation effect of the first connecting channel.

[0025] Optionally, the cylinder block includes:

[0026] A first cylinder body, wherein a first connecting surface is provided on the first connecting surface, a first groove is provided on the first connecting surface, and a first through groove communicating with the first groove is provided on the first cylinder body;

[0027] The second cylinder body has a second connecting surface and a second groove. A second through groove communicating with the second groove is provided on the second cylinder body.

[0028] When the first cylinder body and the second cylinder body are fixedly connected, the first connecting surface and the second connecting surface fit together, the first groove and the second groove contact each other to form the air supply channel, and the first through groove and the second through groove contact each other to form the air supply inlet.

[0029] Specifically, compared to a conventional cylinder, this cylinder body consists of two parts, upper and lower. After the two parts are sealed and fixedly connected, the first and second grooves together form an air supply channel. By dividing the cylinder body into upper and lower parts, the manufacturing process requirements of the air supply channel can be met. This facilitates the machining of the air supply channel into an arc-shaped channel, minimizing the distance between the air supply channel and the outer wall of the cylinder body. This improves the heat exchange effect between the fluid and the oil in the oil sump. At the same time, it facilitates the assembly of the switch assembly, allowing it to be sealed and connected to the air supply channel.

[0030] Optionally, a first fastening hole is provided on the first cylinder body, and a second fastening hole corresponding to the first fastening hole is provided on the second cylinder body. When the first cylinder body and the second cylinder body are fixedly connected, the first fastening hole and the second fastening hole are connected by fasteners.

[0031] Specifically, by setting the first fastening hole and the second fastening hole, the alignment accuracy of the first cylinder block and the second cylinder block can be improved when assembling the first cylinder block and the second cylinder block, and the connection stability of the first cylinder block and the second cylinder block can be improved by fixing the first cylinder block and the second cylinder block with fasteners.

[0032] Optionally, multiple first fastening holes are provided, with at least one first fastening hole located between the first groove and the compression chamber; multiple second fastening holes are provided, with at least one second fastening hole located between the second groove and the compression chamber.

[0033] Specifically, by setting multiple first fastening holes and multiple second fastening holes, and by having a first fastening hole between the first groove and the compression chamber, and a second fastening hole between the second groove and the compression chamber, the forces on the first cylinder and the second cylinder can be more balanced when they are fastened through the first fastening holes and the second fastening holes.

[0034] Secondly, this utility model also provides a compressor, including the cylinder assembly described above.

[0035] Specifically, the compressor includes an oil sump, which contains the cylinder block and the oil that exchanges heat with the side walls of the cylinder block. Through the air supply passage in the cylinder block, heat exchange occurs between the oil and the oil in the sump, reducing the temperature of the oil sump, lowering the viscosity of the oil, alleviating wear on compressor parts, and further improving compressor reliability. By setting an air supply passage on the side wall of the cylinder block, the oil sump and the compression chamber are isolated, preventing the low-temperature, low-pressure refrigerant in the low-pressure chamber from being heated and expanding, reducing suction volumetric efficiency loss, and improving heating capacity.

[0036] Thirdly, this utility model also provides a heat pump air conditioner, including the compressor described above.

[0037] Specifically, because heat pump air conditioners use the aforementioned compressors, which have higher volumetric efficiency and stronger heating capacity, the heating volumetric efficiency of the heat pump air conditioner is improved, its heating capacity is increased, and the compression ratio is reduced.

[0038] In summary, this utility model has the following beneficial effects:

[0039] By setting a gas injection channel on the side wall of the cylinder block, the oil sump and compression chamber are isolated, preventing the cylinder block from being heated by the oil sump and transferring heat to the low-pressure chamber. This avoids the low-temperature, low-pressure refrigerant in the low-pressure chamber from expanding due to heating, reducing suction volumetric efficiency loss and improving heating capacity. Furthermore, by supplying the gas injection channel with medium-temperature, medium-pressure refrigerant output from the compressor's gas injection components, the refrigerant absorbs heat from the cylinder wall and oil sump, lowering the oil sump temperature, increasing the viscosity of the lubricating oil in the oil sump, mitigating wear on compressor parts, and further improving compressor reliability. Moreover, using a medium-temperature, medium-pressure refrigerant as the gas injection gas, with its higher pressure, allows it to exceed the high-pressure chamber pressure after absorbing heat from the cylinder block and oil sump, thus enabling higher gas injection efficiency. Attached Figure Description

[0040] Figure 1 This is a cross-sectional structural schematic diagram of an existing compressor in the background art of this utility model;

[0041] Figure 2 This is a schematic diagram of the structure of an existing cylinder assembly in the background art of this utility model;

[0042] Figure 3 This is a schematic diagram of the compressor according to Embodiment 5 of this utility model;

[0043] Figure 4 This is a schematic diagram of the air replenishment principle of the cylinder assembly according to an embodiment of the present utility model;

[0044] Figure 5 This is a schematic diagram of the cylinder assembly according to an embodiment of the present invention;

[0045] Figure 6 This is a schematic diagram of the switch assembly in the closed state according to an embodiment of the present invention;

[0046] Figure 7 This is a schematic diagram of the switch assembly in the open state according to an embodiment of the present invention;

[0047] Figure 8 This is a schematic diagram of the structure of the first cylinder block according to an embodiment of the present invention;

[0048] Figure 9 This is a schematic diagram of the structure of the second cylinder body according to an embodiment of the present invention.

[0049] In the diagram: 1. Compressor; 10. Inlet; 100. Cylinder; 110. First cylinder; 111. First connecting surface; 112. First groove; 113. First through groove; 120. Second cylinder; 121. Second connecting surface; 122. Second groove; 123. Second through groove; 200. Compression chamber; 210. Low-pressure chamber; 220. High-pressure chamber; 300. Roller; 400. Air supply channel; 410. First connecting channel; 420. Second connection channel; 401, Air inlet; 402, Air outlet; 500, Switch assembly; 510, Valve seat; 511, First opening; 512, Second opening; 520, Valve body; 530, Elastic element; 600, First fastening hole; 700, Second fastening hole; 800, Oil sump; 900, Air supply component; 910, Condenser; 920, Flash evaporator; 930, Throttling valve A; 940, Throttling valve B; 950, Evaporator. Detailed Implementation

[0050] To make the objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein.

[0051] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 or an electrical 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. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0052] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0053] Example 1

[0054] This embodiment provides a cylinder assembly, such as Figure 4-9 As shown, it includes: a cylinder body 100, wherein a compression chamber 200 is provided inside the cylinder body 100;

[0055] A roller 300 is rotatably disposed within the compression chamber 200, and the roller 300 divides the compression chamber 200 into a low-pressure chamber 210 and a high-pressure chamber 220.

[0056] An air supply channel 400 is disposed on the side wall of the cylinder body 100. The air supply channel 400 has an air supply inlet 401 and an air supply outlet 402. The air supply inlet 401 penetrates the side wall of the cylinder body 100 and is connected to the air supply component 900 of the compressor 1. The air supply outlet 402 is connected to the high pressure chamber 220. A switch assembly 500 is provided at the air supply outlet 402 and is used to control the opening or closing of the air supply outlet 402.

[0057] Specifically, the cylinder 100 has an intake port 10, which is connected to the low-pressure chamber 210. When the compressor 1 is running, as the roller 300 rotates, the low-temperature, low-pressure refrigerant enters the low-pressure chamber 210 through the intake port 10. The fluid in the high-pressure chamber 220 is compressed, causing a change in pressure between the high-pressure chamber 220 and the low-pressure chamber 210. At this time, the medium-temperature, medium-pressure refrigerant output from the compressor 1's gas supply component 900 is input into the gas supply channel 400 through the gas supply inlet 401. Since the temperature of the oil sump 800 is higher than that of the medium-temperature, medium-pressure refrigerant, the medium-temperature, medium-pressure refrigerant absorbs heat in the gas supply channel 400 due to contact with the cylinder 100 and the oil sump 800. After absorbing heat, the pressure of the medium-temperature, medium-pressure refrigerant increases. When the pressure in the gas supply channel 400 is greater than the pressure in the high-pressure chamber 220, the switch component 500 is opened, and the medium-temperature, medium-pressure refrigerant enters the high-pressure chamber 220 through the switch component 500 to supply gas to the high-pressure chamber 220. When the pressure inside the high-pressure chamber 220 is greater than the pressure inside the air supply channel 400, the switch assembly 500 closes, completing the air supply to the high-pressure chamber 220.

[0058] By providing a gas replenishment channel 400 on the side wall of the cylinder 100, the oil sump 800 and the compression chamber 200 are isolated, preventing the cylinder 100 from being heated by the oil sump 800 and transferring heat to the low-pressure chamber 210. This prevents the low-temperature, low-pressure refrigerant in the low-pressure chamber 210 from being heated and expanding, reducing suction volumetric efficiency loss and improving heating capacity. Furthermore, by replenishing the gas replenishment channel 400 with medium-temperature, medium-pressure refrigerant output from the gas replenishment component 900 of the compressor 1, the medium-temperature, medium-pressure refrigerant can absorb heat from the cylinder wall of the cylinder 100 and the oil sump 800, lowering the temperature of the oil sump 800, increasing the viscosity of the lubricating oil in the oil sump 800, alleviating wear on compressor 1 parts, and further improving the reliability of the compressor 1. Moreover, using a medium-temperature, medium-pressure refrigerant as the gas replenishment gas, which has a higher pressure, allows it to replenish the high-pressure chamber 220 after absorbing heat from the cylinder 100 and the oil sump 800, resulting in higher replenishment efficiency.

[0059] Please see Figure 4When the heat pump air conditioner with intermediate gas replenishment structure is running, the compressor 1 compresses the refrigerant and discharges high-temperature and high-pressure vapor. The high-temperature and high-pressure vapor enters the condenser 910 and exchanges heat with the outside in the condenser 910, releasing heat and lowering its temperature. It then further condenses into liquid and discharges low-temperature and high-pressure liquid. After passing through the flash evaporator 920, the low-temperature and high-pressure liquid is divided into two branches. One branch is the gas replenishment branch. This branch releases medium-pressure vapor after passing through the throttle valve B940. The medium-pressure vapor passes through the gas replenishment component 900 of the compressor 1 and enters the gas replenishment channel 400 through the gas replenishment inlet 401. The other branch is the main circulation loop. When passing through the throttle valve A930, it releases low-temperature and low-pressure wet vapor and enters the evaporator 950. The low-temperature and low-pressure wet vapor evaporates and vaporizes in the evaporator 950 to form low-temperature and low-pressure vapor. The low-temperature and low-pressure vapor enters the low-pressure chamber 210 of the compressor 1 compression chamber 200 through the suction port 10 to complete the entire cycle.

[0060] When compressor 1 is running, low-temperature, low-pressure refrigerant enters the low-pressure chamber 210 through suction port 10. As the compression angle of compression chamber 200 increases, it is gradually compressed. When the compression angle is θ, the pressure in high-pressure chamber 220 is P2. At the same time, medium-temperature, medium-pressure refrigerant enters the replenishment channel 400 through replenishment inlet 401. Because the temperature of oil sump 800 is higher than that of medium-temperature, medium-pressure refrigerant, the medium-temperature, medium-pressure refrigerant directly contacts the wall of cylinder 100 in replenishment channel 400, while cylinder 100 avoids contact with oil sump 800. Therefore, the medium-temperature, medium-pressure refrigerant in replenishment channel 400 can absorb the heat transferred from the wall of cylinder 100. After absorbing heat, the pressure of medium-temperature, medium-pressure refrigerant is the replenishment pressure P1. When the compression chamber 200 begins to draw in gas, the pressure P2 in the high-pressure chamber 220 is less than the gas replenishment pressure P1. The switching assembly 500 is opened under positive pressure, and the medium-temperature and medium-pressure refrigerant enters the high-pressure chamber 220 through the switching assembly 500 for gas replenishment. As the compression angle θ gradually increases, the pressure P2 in the high-pressure chamber 220 also gradually increases. When the pressure P2 in the high-pressure chamber 220 is greater than the gas replenishment pressure P1, the switching assembly 500 is closed under reverse pressure, completing a complete gas replenishment process.

[0061] Example 2

[0062] Please see Figures 5-7 Based on Embodiment 1, the difference between this embodiment and Embodiment 1 is that, in this embodiment, the switching assembly 500 in the cylinder assembly includes:

[0063] Valve seat 510 is disposed at the air supply outlet 402. Valve seat 510 has a first opening 511 and a second opening 512. The first opening 511 faces the air supply channel 400 and the second opening 512 faces the high pressure chamber 220.

[0064] Valve body 520, which is movably connected to valve seat 510, is used to block the first opening 511;

[0065] An elastic element 530 is provided at one end on the valve seat 510 and at the other end abuts against the valve body 520. The valve body 520 blocks the first opening 511 under the elastic force of the elastic element 530 and opens the first opening 511 under the fluid pressure in the air supply channel 400.

[0066] Specifically, when the pressure in the gas supply channel 400 is greater than the pressure in the high-pressure chamber 220, the medium-temperature and medium-pressure refrigerant in the gas supply channel 400 pushes the valve body 520 to move toward the second opening 512, causing the valve body 520 to separate from the valve seat 510. The elastic element 530 is compressed, and the first opening 511 on the valve seat 510 loses the sealing effect of the valve body 520. The first opening 511 and the second opening 512 are connected, and the medium-temperature and medium-pressure refrigerant can enter the high-pressure chamber 220 through the first opening 511 and the second opening 512 to complete the gas supply to the high-pressure chamber 220.

[0067] After the high-pressure chamber 220 is replenished with air, the pressure inside the high-pressure chamber 220 increases as the rotor rotates. When the pressure inside the replenishment channel 400 is less than the pressure inside the high-pressure chamber 220, the elastic element 530 resets and pushes the valve body 520 to move toward the first opening 511, and the valve body 520 blocks the first opening 511. At this time, the replenishment channel 400 and the high-pressure chamber 220 are isolated by the valve body 520, preventing the fluid in the high-pressure chamber 220 from entering the replenishment channel 400.

[0068] In this embodiment, the elastic element 530 is a spring. One end of the spring is fixed to the valve body 520, and the other end is fixed to the second opening 512 of the valve seat 510. The valve seat 510 is a cylindrical shape with openings at both ends, and the first opening 511 is smaller than the second opening 512. The valve body 520 is a spherical valve body 520. When the pressure P1 in the gas supply channel 400 is less than the sum of the pressure P2 in the high-pressure chamber 220 and the elastic force of the elastic element 530, the valve body 520 is pressed against the first opening 511 by the action of the elastic element 530, and the first opening 511 is closed to prevent the gas in the high-pressure chamber 220 from entering the gas supply channel 400 due to pressure. When the pressure P1 in the gas supply channel 400 is greater than the sum of the pressure P2 in the high-pressure chamber 220 and the elastic force of the elastic element 530, the valve body 520 is pushed by the medium-temperature and medium-pressure refrigerant in the gas supply channel 400, the valve body 520 separates from the first opening 511, and the elastic element 530 is compressed. At this time, the medium-temperature and medium-pressure refrigerant in the gas supply channel 400 can enter the high-pressure chamber 220 to complete the gas supply to the high-pressure chamber 220.

[0069] In other embodiments, the switching assembly 500 may be a one-way valve.

[0070] The gas replenishment cycle process in this embodiment is as follows:

[0071] 1. When the compressor 1 is running, the low-temperature and low-pressure refrigerant enters the low-pressure chamber 210 through the suction port 10 and is gradually compressed as the compression angle of the compression chamber 200 increases.

[0072] 2. The medium-temperature and medium-pressure refrigerant enters the gas supply channel 400 through the gas supply inlet 401. Because the temperature of the oil sump 800 is higher than that of the medium-temperature and medium-pressure refrigerant, the medium-temperature and medium-pressure refrigerant directly contacts the wall of the cylinder 100 in the gas supply channel 400, while the cylinder 100 avoids contact with the oil sump 800. Therefore, the medium-temperature and medium-pressure refrigerant in the gas supply channel 400 can absorb the heat transferred from the wall of the cylinder 100. After absorbing heat, the pressure of the medium-temperature and medium-pressure refrigerant is the gas supply pressure P1.

[0073] 3. When the compression chamber 200 just starts to draw in air, the pressure P1 in the gas replenishment channel 400 is greater than the sum of the pressure P2 in the high-pressure chamber 220 and the elastic force of the elastic element 530. The valve body 520 is pushed by the medium-temperature and medium-pressure refrigerant in the gas replenishment channel 400, the valve body 520 separates from the first opening 511, the elastic element 530 is compressed, and the medium-temperature and medium-pressure refrigerant enters the high-pressure chamber 220 through the switching assembly 500 for gas replenishment.

[0074] 4. As the compression angle θ gradually increases, the pressure P2 in the high-pressure chamber 220 also gradually increases. When the pressure P1 in the air replenishment channel 400 is less than the sum of the pressure P2 in the high-pressure chamber 220 and the elastic force of the elastic element 530, the valve body 520 is pressed against the first opening 511 by the action of the elastic element 530, and the first opening 511 is closed, completing a complete air replenishment process.

[0075] Example 3

[0076] Please see Figure 5 Based on any of the above embodiments, the difference between this embodiment and any of the above embodiments is that, in the cylinder assembly of this embodiment, the air supply channel 400 includes:

[0077] The first connection channel 410, and the air inlet 401 is disposed on the first connection channel 410;

[0078] The second connection channel 420 is connected at one end to the first connection channel 410, the air supply outlet 402 is located at the other end of the second connection channel 420, and the switch assembly 500 is located inside the second connection channel 420.

[0079] Specifically, when replenishing gas into the high-pressure chamber 220, the medium-temperature and medium-pressure refrigerant enters the first connecting channel 410 through the gas replenishment inlet 401. In the first connecting channel 410, it exchanges heat with the cylinder wall of the cylinder 100 and the oil sump 800. After absorbing heat, it enters the second connecting channel 420, which pushes the switching assembly 500 in the second connecting channel 420, allowing the medium-temperature and medium-pressure refrigerant to enter the high-pressure chamber 220.

[0080] Optionally, the first connection channel 410 is an arc-shaped channel.

[0081] Specifically, the first connecting channel 410 of the arc-shaped channel can increase the contact area between the air supply channel 400 and the side wall of the cylinder 100, making the distance between the air supply channel 400 and the outer wall of the cylinder 100 smaller, allowing the fluid in the air supply channel 400 to absorb more heat and improve the efficiency of heat exchange.

[0082] In some embodiments, the first connecting channel 410 may also be a straight channel or a channel of other shapes.

[0083] In some embodiments, the extension direction of the second connecting channel 420 is parallel to the radial direction of the cylinder body 100. This configuration alters the airflow direction when the supplementary air fluid enters the high-pressure chamber 220, creating a turbulence effect. This allows the supplementary air fluid to directly enter the airflow formed by the fluid within the high-pressure chamber 220, improving the mixing degree and efficiency of the two fluids.

[0084] Optionally, the first connection channel 410 is disposed on the outer wall of the cylinder body 100.

[0085] Specifically, by setting the first connecting channel 410 on the outer wall of the cylinder body 100, the distance between the first connecting channel 410 and the oil sump 800 can be reduced, thereby improving the heat exchange capacity and heat insulation effect of the first connecting channel 410.

[0086] Example 4

[0087] Please see Figures 8-9 Based on any of the above embodiments, the difference between this embodiment and any of the above embodiments is that, in the cylinder assembly of this embodiment, the cylinder body 100 includes:

[0088] A first cylinder body 110 is provided with a first connecting surface 111, a first groove 112 is provided on the first connecting surface 111, and a first through groove 113 communicating with the first groove 112 is provided on the first cylinder body 110.

[0089] The second cylinder body 120 has a second connecting surface 121, a second groove 122 is provided on the second connecting surface 121, and a second through groove 123 communicating with the second groove 122 is provided on the second cylinder body 120.

[0090] When the first cylinder body 110 and the second cylinder body 120 are fixedly connected, the first connecting surface 111 and the second connecting surface 121 fit together, the first groove 112 and the second groove 122 correspond to each other to form the air supply channel 400, and the first through groove 113 and the second through groove 123 correspond to each other to form the air supply inlet 401.

[0091] Specifically, compared to a conventional cylinder, the cylinder body 100 consists of two cylinder bodies 100, upper and lower. After the two cylinder bodies 100 are sealed and fixedly connected, the first groove 112 and the second groove 122 together form the air supply channel 400. By dividing the cylinder body 100 into two cylinder bodies 100, the manufacturing process requirements of the air supply channel 400 can be met. This facilitates the machining of the air supply channel 400 into an arc-shaped channel, minimizing the distance between the air supply channel 400 and the outer wall of the cylinder body 100. This improves the heat exchange effect between the fluid and the oil in the oil sump 800. At the same time, it facilitates the assembly of the switch assembly 500, allowing it to be sealed and connected to the air supply channel 400.

[0092] Optionally, a first fastening hole 600 is provided on the first cylinder body 110, and a second fastening hole 700 corresponding to the first fastening hole 600 is provided on the second cylinder body 120. When the first cylinder body 110 and the second cylinder body 120 are fixedly connected, the first fastening hole 600 and the second fastening hole 700 are connected by fasteners.

[0093] Specifically, by setting the first fastening hole 600 and the second fastening hole 700, the alignment accuracy of the first cylinder 110 and the second cylinder 120 can be improved when assembling the first cylinder 110 and the second cylinder 120, and the connection stability of the first cylinder 110 and the second cylinder 120 can be improved by fixing the first cylinder 110 and the second cylinder 120 with fasteners.

[0094] Optionally, multiple first fastening holes 600 are provided, with at least one first fastening hole 600 located between the first groove 112 and the compression chamber 200; multiple second fastening holes 700 are provided, with at least one second fastening hole 700 located between the second groove 122 and the compression chamber 200.

[0095] Specifically, by setting multiple first fastening holes 600 and multiple second fastening holes 700, and by having a first fastening hole 600 between the first groove 112 and the compression chamber 200, and a second fastening hole 700 between the second groove 122 and the compression chamber 200, the first cylinder 110 and the second cylinder 120 can be subjected to more balanced forces when fastened through the first fastening holes 600 and the second fastening holes 700.

[0096] Example 5

[0097] Please see Figure 3 and Figure 4 This embodiment provides a compressor 1, which includes the cylinder assembly of any of the above embodiments.

[0098] In this embodiment, the compressor 1 further includes an oil sump 800 and a gas supply component 900; wherein, the oil sump 800 contains the cylinder 100 and the oil that exchanges heat with the side wall of the cylinder 100. The gas supply component 900 includes: a condenser 910, a flash evaporator 920, a throttle valve A 930, a throttle valve B 940, and an evaporator 950.

[0099] After the compressor 1 compresses the refrigerant, it discharges high-temperature and high-pressure vapor. The high-temperature and high-pressure vapor enters the condenser 910, where it exchanges heat with the outside environment, releases heat, and its temperature decreases. It then condenses into a liquid and discharges a low-temperature and high-pressure liquid. After passing through the flash evaporator 920, the low-temperature and high-pressure liquid is divided into two branches. One branch is the gas injection branch, which releases medium-pressure vapor after passing through the throttle valve B940. The medium-pressure vapor passes through the gas injection component 900 of the compressor 1 and enters the gas injection channel 400 through the gas injection inlet 401. The other branch is the main circulation loop, which releases low-temperature and low-pressure wet vapor after passing through the throttle valve A930. The low-temperature and low-pressure wet vapor evaporates and vaporizes in the evaporator 950 to form low-temperature and low-pressure vapor. The low-temperature and low-pressure vapor enters the low-pressure chamber 210 of the compressor 1 compression chamber 200 through the suction port 10 to complete the entire cycle.

[0100] The air supply passage 400 in the cylinder 100 exchanges heat with the oil in the oil sump 800, which reduces the temperature and viscosity of the oil in the oil sump 800, alleviates wear on the compressor 1 parts, and further improves the reliability of the compressor 1. By providing the air supply passage 400 on the side wall of the cylinder 100, the oil sump 800 and the compression chamber 200 are isolated, preventing the low-temperature, low-pressure refrigerant in the low-pressure chamber 210 from being heated and expanding, reducing suction volumetric efficiency loss, and improving heating capacity.

[0101] The gas replenishment channel 400 and the switching component 500 in this embodiment can be applied to a compressor 1 with a multi-cylinder structure. The multi-cylinder structure can be provided with multiple gas replenishment channels 400. The gas after the previous cylinder component replenishes itself enters the next cylinder component, and the next cylinder component replenishes itself and then discharges, realizing multi-stage gas replenishment, which can further improve the heating capacity and reduce the compression ratio.

[0102] In some embodiments of compressor 1, the air replenishment structure can be configured as follows: an air replenishment channel 400 is formed by adding a lower flange cover plate and the lower flange, the cylinder suction port is connected to one side of the lower flange through a one-way valve, and the other side of the lower flange is connected to the high pressure chamber 220 through a one-way valve.

[0103] Example 6

[0104] This embodiment provides a heat pump air conditioner, including compressor 1 as in Embodiment 5.

[0105] Specifically, since the heat pump air conditioner uses the aforementioned compressor 1, which has higher volumetric efficiency and stronger heating capacity, the heat pump air conditioner's heating volumetric efficiency is improved, its heating capacity is increased, and the compression ratio is reduced.

[0106] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A cylinder assembly, characterized in that, include: A cylinder body, wherein a compression chamber is provided within the cylinder body; A roller, rotatably disposed within the compression chamber, divides the compression chamber into a low-pressure chamber and a high-pressure chamber; An air supply channel is provided on the side wall of the cylinder body. The air supply channel has an air supply inlet and an air supply outlet. The air supply inlet penetrates the side wall of the cylinder body and is used to communicate with the air supply component of the compressor. The air supply outlet is connected to the high-pressure chamber. A switch assembly is provided at the air supply outlet and is used to open or close the air supply outlet.

2. The cylinder assembly according to claim 1, characterized in that, The switching assembly includes: A valve seat is disposed at the air supply outlet. The valve seat has a first opening and a second opening. The first opening faces the air supply channel, and the second opening faces the high-pressure chamber. A valve body, which is movably connected to the valve seat, is used to block the first opening; An elastic element is provided, one end of which is disposed on the valve seat, and the other end of which abuts against the valve body. The valve body blocks the first opening under the elastic force of the elastic element, and the valve body opens the first opening under the fluid pressure in the air supply channel.

3. The cylinder assembly according to claim 1 or 2, characterized in that, The gas replenishment channel includes: The first connection channel, wherein the air inlet is disposed on the first connection channel; The second connection channel has one end connected to the first connection channel, the air supply outlet is located at the other end of the second connection channel, and the switch assembly is located inside the second connection channel.

4. The cylinder assembly according to claim 3, characterized in that, The first connection channel is an arc-shaped channel.

5. The cylinder assembly according to claim 3, characterized in that, The first connecting channel is located on the outer wall of the cylinder.

6. The cylinder assembly according to claim 1, characterized in that, The cylinder body includes: A first cylinder body, wherein a first connecting surface is provided on the first connecting surface, a first groove is provided on the first connecting surface, and a first through groove communicating with the first groove is provided on the first cylinder body; The second cylinder body has a second connecting surface and a second groove. A second through groove communicating with the second groove is provided on the second cylinder body. When the first cylinder body and the second cylinder body are fixedly connected, the first connecting surface and the second connecting surface fit together, the first groove and the second groove contact each other to form the air supply channel, and the first through groove and the second through groove contact each other to form the air supply inlet.

7. The cylinder assembly according to claim 6, characterized in that, A first fastening hole is provided on the first cylinder body, and a second fastening hole corresponding to the first fastening hole is provided on the second cylinder body. When the first cylinder body and the second cylinder body are fixedly connected, the first fastening hole and the second fastening hole are connected by fasteners.

8. The cylinder assembly according to claim 7, characterized in that, The first fastening hole is provided in multiple ways, and at least one of the first fastening holes is located between the first groove and the compression chamber; the second fastening hole is provided in multiple ways, and at least one of the second fastening holes is located between the second groove and the compression chamber.

9. A compressor, characterized in that, Includes the cylinder assembly as described in any one of claims 1-8.

10. A heat pump air conditioner, characterized in that, Includes the compressor as described in claim 9.

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