Double vane cylinder and compressor

Abstract

The present invention provides a double-vane cylinder and compressor, which relates to the technical field of air conditioners, and solves the technical problem that the single-cylinder double-vane rotary compressor in the prior art is prone to gas reflux and gas leakage, which reduces the reliability and energy efficiency of the compressor. The double-vane cylinder includes two air intake ports and two vane grooves; the air intake port is connected to an air intake valve, and the two air intake ports, the air intake valve and the two vane grooves are separated from each other; after the axes of the two vane grooves intersect, the cylinder cavity is divided into two compression chambers with different volumes, and the two compression chambers are respectively connected to the two air intake valves, and the number of vents of the air intake valve connected to the larger volume compression chamber is greater than the number of vents of the other air intake valve. The air intake valve of the present invention avoids gas reflux, and there will be no perforation between the air intake port and the vane groove, which avoids the problem of gas leakage in the cylinder, and the air vent setting of the air intake valve improves the reliability and energy efficiency of the compressor.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to a double-vane cylinder and a compressor. Background Art

[0002] The existing single-cylinder rotary compressor adopts the single-cylinder eccentric compression technology. During use, the compressed gas torque changes greatly. The fluctuation of the torque basically determines the vibration amplitude of the compressor. In addition, the compressor vibration increases with the increase of the compressor displacement, and the air conditioner noise also increases, affecting the comfort of use. The double-cylinder rotary compressor with the same displacement has two upper and lower cylinders, and the two eccentric parts of the crankshaft are arranged 180 degrees. The compressed gas torque changes much less, so the vibration is reduced. However, the double-cylinder rotary compressor has the disadvantages of a large number of parts and a greatly increased production cost. Due to the addition of a set of compression components and the increase of friction pairs, the friction loss increases.

[0003] As a result, a single-cylinder double-vane rotary compressor has emerged, which is generally a structure with two suction ports and two exhaust ports. However, due to the particularity of the double-vane cylinder structure, when the roller runs to the far left or far right, the suction port and the exhaust port work at the same time, and the high and low pressure difference at the suction and exhaust ports will cause the suction backflow phenomenon, thereby increasing the energy loss of the compressor and reducing the energy efficiency of the compressor.

[0004] The applicant has found that the prior art has at least the following technical problems:

[0005] The existing single-cylinder double-vane rotary compressor is prone to gas backflow and gas leakage, which reduces the reliability and energy efficiency of the compressor. Summary of the invention

[0006] The purpose of the present invention is to provide a double-vane cylinder and compressor to solve the technical problem that the single-cylinder double-vane rotary compressor in the prior art is prone to gas reflux and gas leakage, which reduces the reliability and energy efficiency of the compressor. The preferred technical solutions among the many technical solutions provided by the present invention can produce many technical effects as described below.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] The double-vane cylinder provided by the present invention comprises two air intake ports and two vane grooves; the air intake port is connected to an air intake valve, and the two air intake ports, the air intake valve and the two vane grooves are separated from each other; after the axes of the two vane grooves intersect, the inner cavity of the cylinder is divided into two compression chambers with different volumes, and the two compression chambers are respectively connected to the two air intake valves, and the number of air vents of the air intake valve connected to the compression chamber with a larger volume is greater than the number of air vents of the other air intake valve.

[0009] Optionally, the two compression chambers include a first compression chamber and a second compression chamber, and the intake valve includes a first intake valve and a second intake valve; the volume of the first compression chamber is greater than the volume of the second compression chamber; the first compression chamber is connected to the first intake valve, and the second compression chamber is connected to the second intake valve.

[0010] Optionally, two vent holes are arranged on the valve plate of the first air intake valve, and one vent hole is arranged on the valve plate of the second air intake valve.

[0011] Optionally, the vane slot includes a first vane slot and a second vane slot, and the width of the air intake valve and the width of the vane slot satisfy the following relationship:

[0012]

[0013] Wherein, D1 is the width of the first air intake valve, D2 is the width of the second air intake valve, d1 is the width of the first sliding vane groove, and d2 is the width of the second sliding vane groove.

[0014] Optionally, the ratio of the volume of the first compression chamber to the volume of the second compression chamber is greater than 1 and less than 10.

[0015] Optionally, the air intake valve comprises a valve seat, a baffle and a valve plate, and the air intake valve is connected to the air intake port via screws or rivets.

[0016] Optionally, two vent holes are arranged on the valve sheet of the first air intake valve, and one vent hole is arranged on the valve sheet of the second air intake valve, and the vent holes are arranged on the valve sheets.

[0017] Optionally, the air intake valve is provided with one or more valve sheets.

[0018] Optionally, the thickness of the valve sheet does not exceed 0.2 mm.

[0019] Optionally, the tensile strength of the valve plate exceeds 1500 MPa, and the yield strength of the valve plate exceeds 1000 MPa.

[0020] Optionally, the valve plate is made of martensitic stainless steel.

[0021] A compressor comprises a cylinder, wherein the cylinder is the above-mentioned double-vane cylinder.

[0022] Any of the above technical solutions can at least produce the following technical effects:

[0023] The air intake valve structure provided at the air intake port of the double vane cylinder provided by the present invention can avoid gas backflow, thereby improving the energy efficiency of the double vane cylinder, and has the advantages of small torque fluctuation and small vibration of the double vane cylinder. After the two air intake ports, the air intake valve and the two vane grooves are separated from each other, the air intake port and the air intake valve will not interfere with the vane grooves and cause perforation problems, thereby avoiding the problem of gas leakage in the cylinder. The air intake valve connected to the larger volume compression chamber has a large number of vent holes, and the stress of the valve plate of the air intake valve is relatively small, which improves the reliability of the air intake valve, improves the reliability of the entire compressor, and also improves energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the structure of a double-vane cylinder;

[0026] Figure 2 is a schematic diagram of the structure of the first suction valve;

[0027] Figure 3 is a front view of the second suction valve;

[0028] Figure 4 1 is a top view of the second intake valve.

[0029] In the figure, 1 is a cylinder; 2 is a roller; 3 is a slide; 31 is a first slide; 32 is a second slide; 4 is a slide groove; 41 is a first slide groove; 42 is a second slide groove; 5 is an air intake port; 51 is a first air intake port; 52 is a second air intake port; 53 is a receiving groove; 6 is an air intake valve; 61 is a first air intake valve; 62 is a second air intake valve; 63 is a valve seat; 64 is a baffle; 65 is a valve plate; 66 is a mounting hole; 7 is an exhaust port; 71 is a first exhaust port; 72 is a second exhaust port; 8 is an inner cavity of the cylinder; 81 is a first compression chamber; 82 is a second compression chamber. DETAILED DESCRIPTION

[0030] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0031] The present invention provides a double-vane cylinder, such as Figure 1 As shown, it includes two air intake ports 5 and two vane grooves 4. The air intake port 5 is connected to the air intake valve 6, which is naturally a check valve. The check valve only allows the fluid to flow in one direction and prevents the flow in the opposite direction. When the cylinder 1 inhales, the air flow can enter the cylinder 1 through the air intake port 5 and the air intake valve 6. When the cylinder 1 exhausts, the air flow cannot be discharged through the air intake port 5 and the air intake valve 6. When one side of the vane 3 finishes suction and starts compression, the other side of the vane 3 finishes exhaust and starts suction. This working process makes the torque fluctuation of the double vane cylinder during compression smaller than that of an ordinary single-cylinder rotary compressor, thereby reducing the vibration and noise of the compressor. In a single-cylinder double vane cylinder, it is easy for the air intake port 5 and the exhaust port 7 to work at the same time. As Figure 1 As shown, when the roller 2 is located at the far left or far right in the cylinder 1, the air intake port 5 and the air exhaust port 7 work simultaneously, the first air intake port 51 and the second air exhaust port 72 work simultaneously, and the second air intake port 52 and the first air exhaust port 71 work simultaneously. Figure 1 As shown in the rightmost side, the first air intake port 51 and the second air exhaust port 72 work simultaneously, but the check valve structure of the first air intake valve 61 provided at the first air intake port 51 can prevent the airflow from flowing back out of the cylinder 1, thereby improving the energy efficiency of the double vane cylinder, and having the advantages of small torque fluctuation and small vibration of the double vane cylinder. The two air intake ports 5, the air intake valve 6 and the two vane slots 4 are separated from each other, and the air intake ports 5 and the air intake valve 6 will not interfere with the vane slots 4 and cause perforation problems, which can better avoid the leakage problem of the cylinder 1. After the axes of the two vane slots 4 intersect, the cylinder cavity 8 is divided into two compression chambers with different volumes. The two compression chambers are connected to the two air intake valves 6 respectively. The number of vents of the air intake valve 6 connected to the larger volume compression chamber is greater than the number of vents of the other air intake valve 6. The stress of the valve plate 65 with more vents is relatively small, which improves the reliability of the air intake valve 6 and the reliability of the entire compressor.

[0032] As an optional embodiment, the two compression chambers include a first compression chamber 81 and a second compression chamber 82, and the intake valve 6 includes a first intake valve 61 and a second intake valve 62. The volume of the first compression chamber 81 is greater than the volume of the second compression chamber 82; the first compression chamber 81 is connected to the first intake valve 61, and the second compression chamber 82 is connected to the second intake valve 62. After the axes of the two vane grooves 4 intersect (both axes pass through the center of the cylinder 1, so the intersection position is at the center point of the inner side of the cylinder 1), the cylinder cavity 8 (the cylinder cavity 8 is a cylindrical cavity in the cylinder 1 after deducting the roller 2) is divided into a first compression chamber 81 and a second compression chamber 82. The first compression chamber 81 is connected to the first intake valve 61, that is, Figure 1 The second compression chamber 82 is connected to the second air intake valve 62. Figure 1The volume of the first compression chamber 81 is greater than the volume of the second compression chamber 82. Figure 1 The axes of the two sliding vane slots 4 are on the same straight line (the angle between the two axes is 180 degrees). Figure 1 When the position of the second sliding plate groove 42, i.e., the second sliding plate 32, remains unchanged, the first sliding plate groove 41, i.e., the first sliding plate 31, moves to the right side of the cylinder 1, so that the volume of the first compression chamber 81 is greater than the volume of the second compression chamber 82. Preferably, two vents are provided on the valve plate 65 of the first air intake valve 61, and one vent is provided on the valve plate 65 of the second air intake valve 62. Figure 2 As shown, the valve plate 65 of the first air intake valve 61 is a bridge-shaped valve plate, and two vent holes are arranged on the valve plate 65, so the ventilation volume is larger, corresponding to the larger volume of the first compression chamber 81. The stress of the valve plate 65 is small, and the reliability of use is high, but the fastening screw protrudes from the valve seat 63, and the leakage volume is slightly larger. Figure 3 As shown, a vent hole is provided on the valve plate 65 of the second intake valve 62, corresponding to the relatively smaller volume of the second compression chamber 82. The valve plate 65 is a butterfly valve plate. The stress of the valve plate 65 is relatively large, and the force to be overcome for the opening movement is relatively large, which will increase energy consumption and affect performance, but the sealing is good and the leakage is low.

[0033] As an optional implementation, Figure 1 As shown, the vane slot 4 includes a first vane slot 41 and a second vane slot 42, the first vane slot 41 is on the left, and the second vane slot 42 is on the right. The width of the air intake valve 6 and the width of the vane slot 4 satisfy the following relationship:

[0034]

[0035] Among them, D1 is the width of the first air intake valve 61, D2 is the width of the second air intake valve 62, d1 is the width of the first vane slot 41, and d2 is the width of the second vane slot 42. Under this relationship, the two values ​​of 0.4 and 2.5 are substituted into the compressor simulation software used in the industry for simulation calculation. It can be concluded that under this relationship, the air intake port 5 and the air intake valve 6 will not interfere with the vane slot 4 and cause perforation problems, thereby avoiding leakage problems in the cylinder 1 and also avoiding the cylinder 1 having a thin wall between the air intake port 5 and the vane slot 4, which affects the performance of the cylinder.

[0036] As an optional implementation, the ratio of the volume of the first compression chamber 81 to the volume of the second compression chamber 82 is greater than 1 and less than 10. Under this ratio, it is easy to calculate that the width of the intake valve 6 and the width of the slide groove 4 should satisfy the above-mentioned relationship to avoid interference between the intake port 5 and the intake valve 6 and the slide groove 4 and cause perforation.

[0037] As an optional implementation, Figure 2-4As shown, the air intake valve 6 includes a valve seat 63, a baffle 64 and a valve plate 65, and the air intake port 5 is provided with a receiving groove 53 to fasten the air intake valve 6. The air intake valve 6 is connected to the receiving groove 53 by screws or rivets. Figure 2 As shown, the first air intake valve 61 is a two-vent structure, the valve seat 63 is connected to the receiving groove 53 through two mounting holes 66, and two baffles 64 and one side of two valve plates 65 are fixed to the valve seat 63, and the connection method is preferably screw connection, which is convenient for disassembly and replacement of the valve plate 65. Figure 3 As shown, the second air intake valve 62 includes a vent structure, the valve seat 63 is connected to the accommodating groove 53 via a mounting hole 66, and the baffle 64 and one side of the valve plate 65 are fixed to the valve seat 63. The connection method is preferably a screw connection, which is convenient for disassembly and replacement of the valve plate 65, etc.

[0038] As an optional implementation, the air intake valve 6 is provided with one or more layers of valve sheets 65. When multiple layers of valve sheets 65 are provided on the air intake valve 6, the sealing effect of the valve sheet 65 can be increased, but the cost is higher and the energy consumption is also increased. The vent hole is provided on the valve sheet 65, and one, two or more vent holes can be provided as needed to improve the stress condition of the valve sheet.

[0039] As an optional implementation, the thickness of the valve plate 65 does not exceed 0.2 mm. When the thickness of the valve plate 65 is larger, the reliability of the valve plate 65 is enhanced, but the efficiency is reduced. When the thickness of the valve plate 65 is thinner, it is difficult to block the airflow from the air inlet 5, and the improvement of the backflow phenomenon of the double vane compressor is not obvious. The thickness value of 0.2 mm takes both situations into account, so that the valve plate 65 is both reliable and can effectively suppress the backflow phenomenon.

[0040] As an optional implementation, the tensile strength of the valve plate 65 exceeds 1500Mpa, and the yield strength of the valve plate 65 exceeds 1000Mpa. The tensile strength is the maximum load-bearing capacity of the material under static tension, and the yield strength is the stress of the material to resist slight plastic deformation. Under this tensile strength and yield strength, the valve plate 65 has good performance.

[0041] As an optional implementation, the valve plate 65 is made of martensitic stainless steel. The crystal structure of martensitic stainless steel is a body-centered tetragonal structure, which has high strength and hardness and is more suitable as the material of the valve plate 65. Preferably, the martensitic stainless steel is molybdenum-containing martensitic stainless steel, and the molybdenum alloy has high strength, which can further enhance the performance of the valve plate 65.

[0042] As an optional embodiment, the material of the valve plate 65 is hiflex or flap-x. Hiflex is a martensitic chromium steel strip with extremely high fatigue strength developed by SANDVIK. Compared with similar products on the market, Hiflex can withstand more valve plate cycles; has higher fatigue strength under bending and impact stress; has better damping performance; and has the ability to work at high temperatures exceeding 150°C. The valve plate 65 made of this material can improve the efficiency of the compressor, improve the refrigeration output and reduce the noise level. Flap-X is a stainless steel strip. The valve plate 65 plays a vital role in affecting the service life by adapting to constant movement. The fatigue life of Flap-X is significantly improved compared to the standard material UHB SS716 that has been in existence for decades. Its bending fatigue is 30% higher and the impact fatigue cycle is increased by 60%.

[0043] A compressor includes a cylinder, wherein the cylinder is a double-vane cylinder provided by the present invention. The double-vane cylinder provided by the present invention can effectively reduce the high power problem caused by backflow, improve the energy efficiency of the compressor, and save costs. It also improves the torque fluctuation of the rotary compressor, effectively reduces the vibration of the rotary compressor, reduces noise, and improves the comfort of users.

[0044] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A double vane cylinder, characterized in that: It comprises two air intake ports and two sliding vane grooves; the air intake ports are connected to an air intake valve, and the two air intake ports, the air intake valve and the two sliding vane grooves are separated from each other; after the axes of the two sliding vane grooves intersect, the cylinder cavity is divided into two compression chambers with different volumes, the two compression chambers are respectively connected to the two air intake valves, and the number of vent holes of the air intake valve connected to the compression chamber with a larger volume is greater than the number of vent holes of the other air intake valve; The two compression chambers include a first compression chamber and a second compression chamber, and the air intake valve includes a first air intake valve and a second air intake valve; the volume of the first compression chamber is greater than the volume of the second compression chamber; the first compression chamber is connected to the first air intake valve, and the second compression chamber is connected to the second air intake valve; The sliding vane groove includes a first sliding vane groove and a second sliding vane groove, and the width of the air intake valve and the width of the sliding vane groove satisfy the following relationship: Wherein, D1 is the width of the first air intake valve, D2 is the width of the second air intake valve, d1 is the width of the first sliding vane slot, and d2 is the width of the second sliding vane slot; The ratio of the volume of the first compression chamber to the volume of the second compression chamber is greater than 1 and less than 10.

2. The double vane cylinder according to claim 1, characterized in that: The valve plate of the first air intake valve is provided with two vent holes, and the valve plate of the second air intake valve is provided with one vent hole.

3. The double vane cylinder according to claim 1, characterized in that: The air intake valve comprises a valve seat, a baffle and a valve plate, and the air intake valve is connected to the air intake port via screws or rivets.

4. The double vane cylinder according to claim 3, characterized in that: The air intake valve is provided with one or more valve sheets, and the vent holes are provided on the valve sheets.

5. The double vane cylinder according to claim 3, characterized in that: The thickness of the valve sheet does not exceed 0.2 mm.

6. The double vane cylinder according to claim 3, characterized in that: The tensile strength of the valve plate exceeds 1500 MPa, and the yield strength of the valve plate exceeds 1000 MPa.

7. The double vane cylinder according to claim 3, characterized in that: The valve plate is made of martensitic stainless steel.

8. A compressor comprising a cylinder, characterized in that: The cylinder is a double-vane cylinder as described in any one of claims 1-7.

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