Exhaust structure, compressor and air conditioner

Abstract

The utility model provides an exhaust structure, a compressor and an air conditioner. The exhaust structure comprises a valve plate, and the valve plate is movably arranged at an exhaust runner of the compressor. A driving structure; and a control structure. According to the exhaust structure, the compressor and the air conditioner, the control structure is arranged to detect the exhaust pressure and the theoretical pressure of the compressor, and then the driving structure is controlled in an electric signal mode, so that the valve plate can move stably to open or close the exhaust flow channel, and the exhaust flow channel can be opened or closed conveniently. At the moment, the valve plate does not need to be directly driven to be opened by utilizing pressure difference in the prior art, the problem that fluctuation exists after the valve plate is opened by the pressure difference in the prior art is solved, energy loss of exhaust is reduced, noise generated by collision of the valve plate and the limiting block is avoided, meanwhile, timely adjustment can be carried out when working conditions change, and the working efficiency is improved. The problem of over-compression of the compressor is avoided, and the working efficiency and reliability of the compressor are improved.

Description

Technical Field

[0001] This utility model relates to the field of compression equipment technology, and in particular to an exhaust structure, compressor, and air conditioner. Background Technology

[0002] Screw compressors compress fluids through the meshing of rotor pairs. To ensure their output discharge pressure, such as... Figures 1 to 3 As shown, in the prior art, an exhaust check valve a is installed at the outlet of the exhaust passage of the screw compressor. When the compressor is first started, the gas pressure in the exhaust passage is low, so the pressure difference on both sides of the exhaust check valve a (the difference between the compressor's exhaust pressure and the compressor's exhaust back pressure) cannot blow the exhaust check valve a up. The rotor pair remains engaged, which makes the gas pressure in the exhaust passage increase. When the gas pressure is high enough, the exhaust check valve a is opened by the pressure difference, thereby realizing the automatic control of the exhaust port.

[0003] However, the researchers of this utility model application have discovered the following problems with existing screw compressors: First, the exhaust check valve a fluctuates within a certain angle range at the moment of opening. During this process, the exhaust gas constantly needs to act on the exhaust check valve a, causing additional losses to the compressor and reducing its efficiency. Second, during actual operation, the gas pressure in the exhaust passage changes periodically with the meshing speed of the rotor pair, causing the exhaust check valve a to periodically impact the limit block, generating additional exhaust noise and further increasing the energy loss of the exhaust check valve a, increasing the airflow pulsation of the exhaust gas, and further increasing the compressor noise. Third, when the operating conditions of the compressor system change, the compressor exhaust back pressure changes accordingly, while the pressure difference required for the exhaust check valve a to open remains unchanged. At the same time, the compressor's final compression pressure remains unchanged. In this case, the gas pressure in the exhaust passage will continue to rise to open the exhaust check valve a. Simultaneously, the pressure rise at the exhaust passage will cause the compressor to over-compress, reducing its efficiency. Utility Model Content

[0004] To address the technical problem of low compressor efficiency and high noise caused by unreasonable exhaust check valve design in existing compressor technologies, an exhaust structure, compressor, and air conditioner are provided that avoids direct control through pressure difference by using control and drive structures, thereby reducing energy loss of valve plates, improving compressor efficiency, and reducing compressor noise.

[0005] An exhaust structure, applied to a compressor, the exhaust structure comprising:

[0006] A valve plate, which is movably disposed at the exhaust passage of the compressor;

[0007] A drive structure, wherein the valve plate is connected to the drive structure, and the drive structure is capable of moving the valve plate to open or close the exhaust passage;

[0008] The control structure is capable of acquiring the discharge pressure and theoretical pressure of the compressor, and controlling the drive structure based on the comparison result of the discharge pressure and the theoretical pressure.

[0009] The driving structure includes:

[0010] Cylinder block;

[0011] A piston is movably disposed within the cylinder, and the piston divides the interior of the cylinder into a pressure chamber and a back pressure chamber, the pressure chamber being provided with a pressure inlet and a pressure outlet;

[0012] The valve plate is connected to the piston.

[0013] The compressor has an intake chamber, the pressure outlet and the back pressure chamber are both connected to the intake chamber, and the pressure inlet is connected to a pressure source.

[0014] The drive structure also includes a reset mechanism, which is disposed in the cylinder body and can drive the piston to move.

[0015] The control structure includes a pressure detection mechanism that detects the pressure within the exhaust channel.

[0016] The compressor is connected to the condenser, and the control structure can obtain the condensation temperature and cooling water temperature of the condenser to obtain the theoretical pressure.

[0017] The drive structure further includes a first valve body and a second valve body, the first valve body being disposed at the pressure inlet and the second valve body being disposed at the pressure outlet, and the control structure being electrically connected to the first valve body and the second valve body.

[0018] The exhaust structure has an open state and a closed state;

[0019] When the exhaust structure is in the open state, the first valve body switches to the connected state, and the second valve body switches to the closed state;

[0020] When the exhaust structure is in the closed state, the first valve body switches to the closed state, and the second valve body switches to the open state.

[0021] When the exhaust pressure is greater than or equal to the theoretical pressure, the exhaust structure switches to the open state;

[0022] When the exhaust pressure is less than the theoretical pressure, the exhaust structure switches to the connected state.

[0023] A compressor comprising the aforementioned exhaust structure.

[0024] An air conditioner includes the exhaust structure described above or the compressor described above.

[0025] The exhaust structure, compressor, and air conditioner provided by this utility model detect the exhaust pressure and theoretical pressure (exhaust back pressure of the compressor) of the compressor by setting a control structure, and then control the drive structure by means of electrical signals, so that the valve plate can move smoothly to open or close the exhaust passage. At this time, the valve plate does not need to be driven to open directly by the pressure difference in the prior art, which overcomes the problem of fluctuation after the valve plate is opened by the pressure difference in the prior art, reduces the energy loss of exhaust, avoids the noise generated by the collision between the valve plate and the limit block, and can also make timely adjustments when the operating conditions change, avoiding the problem of over-compression of the compressor, thus improving the working efficiency and reliability of the compressor. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a compressor and exhaust check valve in a closed state in the prior art.

[0027] Figure 2 This is a schematic diagram of the existing technology in which the compressor and exhaust check valve are in the open state.

[0028] Figure 3 for Figure 2 A partial schematic diagram at point C;

[0029] Figure 4 This is a schematic diagram of the exhaust structure and compressor provided in the embodiments of this utility model;

[0030] Figure 5 This is a schematic diagram of the exhaust structure and compressor provided in the embodiments of this utility model;

[0031] Figure 6 for Figure 4 A partial schematic diagram at point D;

[0032] Figure 7 A control flowchart of the exhaust structure provided in this embodiment of the utility model;

[0033] In the picture:

[0034] 10. Compressor; 11. Exhaust passage; 1. Valve plate; 2. Cylinder; 3. Piston; 21. Pressure chamber; 22. Back pressure chamber; 23. Pressure inlet; 24. Pressure outlet; 12. Intake chamber; 4. Reset mechanism; 5. Pressure detection mechanism; 6. First valve body; 7. Second valve body. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0036] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0037] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate for the embodiments of the utility model described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0038] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within 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.

[0040] The researchers of this utility model application have discovered the following problems with existing screw compressors: First, the exhaust check valve fluctuates within a certain angle range at the moment of opening. During this process, the exhaust gas constantly needs to act on the exhaust check valve, causing additional losses to the compressor and reducing its efficiency. Second, during actual operation, the gas pressure in the exhaust passage changes periodically with the meshing speed of the rotor pair, causing the exhaust check valve to periodically impact the limit block, generating additional exhaust noise and further increasing the energy loss of the exhaust check valve, increasing the airflow pulsation, and further increasing the compressor noise. Third, when the operating conditions of the compressor system change, the compressor exhaust back pressure changes accordingly, while the pressure difference required for the exhaust check valve to open remains unchanged. Simultaneously, the compressor's final compression pressure remains constant. At this time, the gas pressure in the exhaust passage continues to rise to open the exhaust check valve. This pressure increase in the exhaust passage leads to over-compression of the compressor, reducing its efficiency.

[0041] Therefore, this application provides a method such as Figures 4 to 7 The exhaust structure shown is applied to compressor 10. The exhaust structure includes: a valve plate 1, which is movably disposed at the exhaust passage 11 of compressor 10; a drive structure, on which the valve plate 1 is connected, and the drive structure can drive the valve plate 1 to move to open or close the exhaust passage 11; and a control structure, which can acquire the exhaust pressure and theoretical pressure of compressor 10, and control the drive structure according to the comparison result of the exhaust pressure and the theoretical pressure. By setting a control structure to detect the discharge pressure and theoretical pressure (discharge back pressure of compressor 10), and then using an electrical signal to control the drive structure, the valve plate 1 can move smoothly to open or close the exhaust passage 11. At this time, the valve plate 1 does not need to be driven to open directly by the pressure difference in the prior art, which overcomes the problem of fluctuation after the valve plate 1 is opened by the pressure difference in the prior art, reduces the energy loss of the exhaust, avoids the noise generated by the collision between the valve plate 1 and the limit block, and can also make timely adjustments when the operating conditions change, avoiding the problem of over-compression of compressor 10, and improving the working efficiency and reliability of compressor 10.

[0042] When using the exhaust structure of this application, the exhaust structure is installed on the compressor 10, and the valve plate 1 is closed at the exhaust flow channel 11. Preferably, it can be installed at the end of the exhaust flow channel 11. The control structure is used to detect and judge the exhaust pressure and theoretical pressure of the compressor 10. The exhaust pressure of the compressor 10 can be obtained directly from the pressure in the exhaust flow channel 11 of the compressor 10. The theoretical pressure of the compressor 10 can be calculated based on the cooling water temperature in the circulation of the compressor 10 and the condensing temperature of the condenser connected to the compressor 10. When the exhaust pressure is equal to or even exceeds the theoretical pressure, it indicates that the exhaust of the compressor 10 can meet the needs of the current working condition. The control structure controls the drive structure to work, so that the valve plate 1 moves to open the exhaust flow channel 11, and finally drives the valve plate 1 to completely leave the exhaust flow channel 11. This avoids the valve plate 1 swinging within a certain angle and consuming exhaust energy, thus improving the working efficiency of the compressor 10. At the same time, the valve plate 1 is completely moved out of the exhaust flow channel 11, which can prevent the valve plate 1 from swinging and hitting the limit block, thus avoiding noise. When the operating conditions of the compressor 10 cycle change, the theoretical pressure changes. The control structure can then make a judgment on the drive structure based on the discharge pressure and the theoretical pressure to ensure that the compressor 10 operates normally, avoid over-compression of the compressor 10, and ensure the working efficiency and reliability of the compressor 10.

[0043] The drive structure includes: a cylinder body 2; a piston 3, which is movably disposed within the cylinder body 2, dividing the interior of the cylinder body 2 into a pressure chamber 21 and a back pressure chamber 22. The pressure chamber 21 is provided with a pressure inlet 23 and a pressure outlet 24; and a valve plate 1 is connected to the piston 3. The cylinder body 2 is disposed on the body of the compressor 10 or within the compressor 10. A pressure medium (preferably hydraulic oil) is supplied to the pressure chamber 21 through the pressure inlet 23, causing the piston 3 to move the valve plate 1, thereby regulating the opening of the exhaust passage 11. When it is necessary to close the valve plate 1, the pressure medium is discharged from the pressure chamber 21 through the pressure outlet 24, and the piston 3 returns to its original position without pressure. During the resetting process, the piston 3 drives the valve plate 1 to move in the opposite direction, thereby regulating the closing of the exhaust passage 11. The back pressure chamber 22 is provided with an opening to adjust the amount of air in the back pressure chamber 22 during the movement of the piston 3, ensuring reliable movement of the piston 3.

[0044] Optionally, the compressor 10 has a suction chamber 12, and both the pressure outlet 24 and the back pressure chamber 22 are connected to the suction chamber 12. The pressure inlet 23 is connected to a pressure source. The pressure inside the suction chamber 12 is much lower than the pressure of the pressure medium. Therefore, the pressure medium can be sent into the suction chamber 12 and then recovered through a preset device. At the same time, the back pressure chamber 22 is also directly connected to the suction chamber 12 to ensure the cleanliness of the back pressure chamber 22, thereby ensuring the reliability of the piston 3's movement and the operational reliability of the drive structure.

[0045] The drive structure also includes a reset mechanism 4, which is disposed within the cylinder 2 and can drive the piston 3 to move. The reset mechanism 4 drives the piston 3 to move, thereby resetting the piston 3 and sealing the exhaust passage 11 by the valve plate 1, ensuring the reliability of the compressor 10. Optionally, the reset mechanism 4 is a spring.

[0046] like Figure 3 As shown in the diagram, cylinder 2 is located above valve plate 1. Piston 3 is connected to valve plate 1 via a connecting rod, and piston 3 is initially positioned at the lower part of cylinder 2. At this time, the lower part of piston 3 is the pressure chamber 21, and the upper part is the back pressure chamber 22. When it is necessary to open the exhaust passage 11, piston 3 moves upward, and valve plate 1 also moves upward with piston 3. Reset mechanism 4 is located in back pressure chamber 22, which can press piston 3 downward to ensure that piston 3 is in its initial state.

[0047] In one embodiment, the control structure includes a pressure detection mechanism 5, which detects the pressure in the exhaust channel 11. Preferably, the pressure detection mechanism 5 is located in the part of the exhaust channel 11 away from the valve plate 1 to ensure the reliability of the pressure detection mechanism 5 in detecting the exhaust pressure.

[0048] The compressor 10 is connected to the condenser, and the control structure can obtain the condensing temperature of the condenser and the cooling water temperature to obtain the theoretical pressure. The exhaust back pressure is the pressure acting on the side of the valve plate 1 away from the exhaust passage 11, and it is the same as the condensing pressure in the cycle where the compressor 10 and the condenser are located. Therefore, it can be calculated using the cooling water temperature and the condensing temperature of the condenser.

[0049] The drive structure further includes a first valve body 6 and a second valve body 7. The first valve body 6 is disposed at the pressure inlet 23, and the second valve body 7 is disposed at the pressure outlet 24. The control structure is electrically connected to the first valve body 6 and the second valve body 7. The first valve body 6 controls the opening or closing of the pressure inlet 23, thereby controlling whether the pressure medium enters the pressure chamber 21. Similarly, the second valve body 7 can control the opening or closing of the pressure outlet 24, thereby controlling whether the pressure medium flows out of the pressure chamber 21.

[0050] Specifically, the exhaust structure has an open state and a closed state;

[0051] When the exhaust structure is in the open state, the first valve body 6 switches to the connected state and the second valve body 7 switches to the closed state. At this time, the pressure medium is sent into the pressure chamber 21 through the pressure inlet 23. The piston 3 is squeezed by the pressure medium and moves, thereby driving the valve plate 1 to open the exhaust passage 11, and the compressor 10 realizes exhaust.

[0052] When the exhaust structure is in the closed state, the first valve body 6 switches to the closed state and the second valve body 7 switches to the connected state. At this time, the pressure medium will flow out of the pressure chamber 21 through the pressure outlet 24. The piston 3 will be squeezed by the reset mechanism 4 and reset. The valve plate 1 will be reset synchronously with the piston 3, and the exhaust passage 11 will be closed.

[0053] When the exhaust pressure is greater than or equal to the theoretical pressure, the exhaust pressure of the compressor 10 can meet the pressure requirements of the current working condition. The exhaust structure is switched to the open state, and the compressor 10 starts to exhaust.

[0054] When the exhaust pressure is less than the theoretical pressure, the exhaust pressure of the compressor 10 cannot meet the pressure requirements of the current operating condition. The exhaust structure is switched to the connected state, and the compressor 10 continues to work to increase the exhaust pressure in the exhaust channel 11 until the exhaust pressure is greater than or equal to the theoretical pressure, and then the exhaust structure is opened again.

[0055] Especially when the operating conditions change, such as when the theoretical pressure increases, the exhaust check valve in the prior art needs the pressure in the exhaust passage 11 to be greater than the theoretical pressure by a certain pressure difference before it can be opened again. At this time, the compressor 10 is in an over-compression state, and the working efficiency is reduced. However, in this application, the exhaust structure can be controlled to open as long as the exhaust pressure is greater than the theoretical pressure. The compressor 10 does not have the problem of over-compression, thus ensuring the working efficiency of the compressor 10.

[0056] A compressor 10 includes the above-described exhaust structure. Preferably, the compressor is a screw compressor, and the exhaust passage 11 is located at the end of the meshing rotor pair.

[0057] An air conditioner includes the exhaust structure described above or the compressor described above.

[0058] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An exhaust structure, characterized in that: Applied to compressor (10), the exhaust structure includes: Valve plate (1), which is movably disposed at the exhaust passage (11) of the compressor (10); The drive structure is provided, wherein the valve plate (1) is connected to the drive structure, and the drive structure is capable of moving the valve plate (1) to open or close the exhaust passage (11); The control structure is capable of acquiring the exhaust pressure and theoretical pressure of the compressor (10) and controlling the drive structure based on the comparison result of the exhaust pressure and the theoretical pressure.

2. The exhaust structure according to claim 1, characterized in that: The driving structure includes: Cylinder block (2); Piston (3), the piston (3) is movably disposed in the cylinder (2), and the piston (3) divides the interior of the cylinder (2) into a pressure chamber (21) and a back pressure chamber (22), and the pressure chamber (21) is provided with a pressure inlet (23) and a pressure outlet (24); The valve plate (1) is connected to the piston (3).

3. The exhaust structure according to claim 2, characterized in that: The compressor (10) has an intake chamber (12), the pressure outlet (24) and the back pressure chamber (22) are both connected to the intake chamber (12), and the pressure inlet (23) is connected to the pressure source.

4. The exhaust structure according to claim 2, characterized in that: The drive structure also includes a reset mechanism (4), which is disposed inside the cylinder (2) and can drive the piston (3) to move.

5. The exhaust structure according to claim 1, characterized in that: The control structure includes a pressure detection mechanism (5), which detects the pressure in the exhaust channel (11).

6. The exhaust structure according to claim 5, characterized in that: The compressor (10) is connected to the condenser, and the control structure is able to obtain the condensation temperature and cooling water temperature of the condenser to obtain the theoretical pressure.

7. The exhaust structure according to claim 2, characterized in that: The drive structure further includes a first valve body (6) and a second valve body (7). The first valve body (6) is located at the pressure inlet (23), and the second valve body (7) is located at the pressure outlet (24). The control structure is electrically connected to the first valve body (6) and the second valve body (7).

8. The exhaust structure according to claim 7, characterized in that: The exhaust structure has an open state and a closed state; When the exhaust structure is in the open state, the first valve body (6) switches to the connected state, and the second valve body (7) switches to the closed state; When the exhaust structure is in the closed state, the first valve body (6) switches to the closed state and the second valve body (7) switches to the connected state.

9. The exhaust structure according to claim 8, characterized in that: When the exhaust pressure is greater than or equal to the theoretical pressure, the exhaust structure switches to the open state; When the exhaust pressure is less than the theoretical pressure, the exhaust structure switches to the connected state.

10. A compressor, characterized in that: The exhaust structure includes any one of claims 1 to 9.

11. An air conditioner, characterized in that: Includes the exhaust structure according to any one of claims 1 to 9 or the compressor according to claim 10.

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