Compressor structure and air conditioner

Abstract

The utility model provides a compressor structure and an air conditioner, and the compressor structure comprises a cylinder body which is internally provided with an air suction cavity and an air exhaust cavity; the rotor component is arranged in the cylinder body; the rotor part is movably arranged so as to compress air in the air suction cavity into the air exhaust cavity; the detection module is used for detecting the position of the rotor component; the detection module is used for detecting the motion state of the rotor part; the control module controls the rotor part to rotate forwards or backwards according to the position of the rotor part and the motion state of the rotor part, and the compressor structure solves the problem that in the related technology, starting is abnormal after a compressor is shut down due to high-frequency operation failures.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a compressor structure and an air conditioner. Background Art

[0002] When variable-frequency air conditioners operate at high frequencies and system and drive protection issues occur, they immediately shut down. This causes heavy internal loads on the compressor, leading to abnormal startups when the compressor restarts. This phenomenon has been observed in both aftermarket units and laboratory tests. Therefore, it is necessary to design a compressor startup control method based on reverse rotation to reduce the probability of abnormal startups and improve unit reliability.

[0003] Prior art discloses a variable-capacity fixed-frequency compressor with a motor that rotates forward or reverse. Depending on the cooling capacity, the compressor rotates forward in high-capacity mode and reverse in low-capacity mode, reducing noise and saving energy. However, this method is only applicable to specific fixed-frequency compressors with reverse operating modes, making it unusable in variable-frequency air conditioners.

[0004] Therefore, the prior art needs to be further developed. Utility Model Content

[0005] The purpose of the present invention is to overcome the above technical deficiencies and provide a compressor structure and an air conditioner to solve the problem of abnormal startup after a high-frequency operation fault shutdown of the compressor in the related art.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: providing a compressor structure, including:

[0007] A cylinder body, wherein the cylinder body has an air intake cavity and an air exhaust cavity;

[0008] a rotor component, the rotor component being disposed in the cylinder; the rotor component being movably disposed to compress the gas in the suction chamber into the exhaust chamber;

[0009] a detection module, the detection module being used to detect the position of the rotor component; the detection module being used to detect the motion state of the rotor component;

[0010] A control module controls the rotor component to rotate forward or reverse according to the position of the rotor component and the motion state of the rotor component.

[0011] Furthermore, the compressor structure includes a piston component, which is relatively movably connected to the cylinder body and abuts against the rotor component; the piston component, the rotor component and the inner wall of the cylinder body form the intake cavity and the exhaust cavity.

[0012] Furthermore, the cylinder body has a accommodating cavity, which includes the air intake cavity and the air exhaust cavity; wherein the accommodating cavity is a cylindrical cavity.

[0013] Furthermore, the straight line on which the moving direction of the piston component lies is perpendicular to the axis of the accommodating cavity.

[0014] Furthermore, the rotor component is a cylindrical structure.

[0015] Furthermore, the compressor structure also includes an exhaust flange, which is movably arranged to close or open the exhaust cavity; a position sensor connected to the control module signal is arranged on the exhaust flange.

[0016] Furthermore, a pressure sensor is provided on the exhaust flange, and the pressure sensor is signal-connected to the control module.

[0017] Furthermore, the control module includes:

[0018] Intelligent power module;

[0019] A three-phase circuit is connected to the intelligent power module, and the three-phase circuit is connected to the rotor component; the intelligent power module is used to control the current direction of the three-phase circuit.

[0020] Furthermore, the compressor structure further comprises:

[0021] A current sensor is provided on the three-phase circuit; the current sensor is signal-connected to the control module.

[0022] An air conditioner comprises a compressor structure, wherein the compressor structure is the above-mentioned compressor structure.

[0023] Beneficial effects:

[0024] 1. The compressor structure of the present invention includes: a cylinder body, the cylinder body having an intake cavity and an exhaust cavity; a rotor component, the rotor component being disposed within the cylinder body; the rotor component being movably disposed to compress the gas in the intake cavity into the exhaust cavity; a detection module, the detection module being configured to detect the position of the rotor component; the detection module being configured to detect the motion state of the rotor component; and a control module, the control module being configured to control the forward or reverse rotation of the rotor component based on the position and motion state of the rotor component. With the above arrangement, when the compressor structure is shut down, the rotor component stops rotating and remains stationary at a certain position within the cylinder body. When the compressor structure is restarted, the position where the rotor component stops will affect the state of the gas within the exhaust cavity, thereby affecting the startup of the compressor structure. Therefore, by detecting the position and motion state of the rotor component, it is determined whether the rotor component needs to be adjusted before the compressor structure is started, thereby adjusting the position of the rotor component, thereby solving the problem of abnormal startup after a compressor shuts down due to a high-frequency operation fault in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of the compressor structure adopted in the embodiment of the present utility model;

[0026] Figure 2 This is a schematic diagram of the state of the compressor structure used in the embodiment of the present utility model when it fails to start;

[0027] Figure 3 This is a schematic diagram of the compressor structure used in the embodiment of the present utility model when it is reversed;

[0028] Figure 4 This is a schematic diagram of the circuit structure of the compressor structure adopted in the embodiment of the present utility model;

[0029] Figure 5 This is a schematic diagram of the structural relationship provided by an embodiment of the present utility model;

[0030] Figure 6 This is a flow chart of a method for controlling a compressor structure provided by an embodiment of the present utility model;

[0031] Figure 7 This is a schematic structural diagram of the exhaust flange of the compressor structure adopted in the embodiment of the present utility model;

[0032] Figure 8 It is a structural diagram of a pressure sensor of a compressor structure adopted in an embodiment of the present utility model.

[0033] The above drawings include the following reference numerals:

[0034] 1. Cylinder body; 10. Accommodating chamber; 11. Intake chamber; 12. Exhaust chamber; 2. Rotor component; 3. Detection module; 4. Control module; 5. Piston component; 6. Exhaust flange; 61. Position sensor; 7. Pressure sensor; 8. Intelligent power module; 9. Three-phase circuit; 91. Current sensor. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0036] See also Figures 1 to 6 According to an embodiment of the present invention, a compressor structure is provided, including: a cylinder body 1, wherein the cylinder body 1 has an intake cavity 11 and an exhaust cavity 12; a rotor component 2, wherein the rotor component 2 is arranged in the cylinder body 1; the rotor component 2 is movably arranged to compress the gas in the intake cavity 11 into the exhaust cavity 12; a detection module 3, wherein the detection module 3 is used to detect the position of the rotor component 2; the detection module 3 is used to detect the motion state of the rotor component 2; and a control module 4, wherein the control module 4 controls the rotor component 2 to rotate forward or reverse according to the position of the rotor component 2 and the motion state of the rotor component 2.

[0037] With the above arrangement, when the compressor structure is shut down, rotor component 2 stops rotating and comes to rest at a certain position within cylinder body 1. When the compressor structure is restarted, the position of rotor component 2 will affect the state of the gas within exhaust chamber 12, thereby affecting the startup of the compressor structure. Therefore, by detecting the position and motion state of rotor component 2, it is determined whether rotor component 2 needs to be adjusted before the compressor structure is started, thereby adjusting the position of rotor component 2. This solves the problem of abnormal startup after a high-frequency compressor shutdown caused by a fault in the related art.

[0038] In the compressor structure of this embodiment, see Figures 1 to 3 The compressor structure includes a piston component 5, which is relatively movably connected to the cylinder body 1 and abuts against the rotor component 2; the piston component 5, the rotor component 2 and the inner wall of the cylinder body 1 form the intake cavity 11 and the exhaust cavity 12.

[0039] See also Figures 1 to 3In the compressor structure of this embodiment, the cylinder body 1 has a accommodating chamber 10, and the accommodating chamber 10 includes the intake chamber 11 and the exhaust chamber 12; wherein, the accommodating chamber 10 is a cylindrical cavity.

[0040] Specifically, the accommodating cavity 10 is set as a cylindrical cavity, so that the inner wall surface of the accommodating cavity 10 is smoother, which is conducive to starting the rotor component 2. At the same time, the cylindrical cavity structure is more symmetrical, which is conducive to the detection module 3 detecting the position of the rotor component 2.

[0041] In the compressor structure of this embodiment, see Figures 1 to 3 The straight line in which the cylinder 1 moves is perpendicular to the axis of the accommodating cavity 10 .

[0042] With the above arrangement, the straight line in which the cylinder body 1 moves is perpendicular to the axis of the accommodating cavity 10 , making the overall structure inside the cylinder body 1 more symmetrical, which is beneficial for the detection module 3 to detect the position of the rotor component 2 .

[0043] See also Figures 1 to 3 In the compressor structure of this embodiment, the rotor component 2 is a cylindrical structure.

[0044] The cylindrical rotor component 2 has a smoother appearance, which is conducive to the startup of the rotor component 2 and is more suitable for compressors that need to be started and stopped frequently. In addition, the cylindrical structure is more symmetrical, which is conducive to the detection module 3 detecting the position of the rotor component 2.

[0045] See also Figure 7 In the compressor structure of this embodiment, the compressor structure also includes an exhaust flange 6, which is movably arranged to close or open the exhaust chamber 12; a position sensor 61 is provided on the exhaust flange 6 and is signal-connected to the control module 4.

[0046] See also Figure 7 With the above arrangement, when the compressor structure starts, the rotor component 2 squeezes the gas in the exhaust chamber 12 and discharges it from the exhaust flange 6. If the compressor fails to start, the rotor component 2 is in a state of positive shaking, and the rotor component 2 cannot discharge the gas in the exhaust chamber 12. At this time, the airflow cannot push open the exhaust flange 6, and the control module 4 does not receive a signal, so it controls the rotor component 2 to shut down, thereby protecting the compressor structure.

[0047] In the compressor structure of this embodiment, see Figure 8 A pressure sensor 7 is provided on the exhaust flange 6 , and the pressure sensor 7 is signal-connected to the control module 4 .

[0048] With the above arrangement, when the compressor structure is started, the rotor component 2 squeezes the gas in the exhaust chamber 12 and discharges it from the exhaust flange 6. The rotor component 2 moves, and the pressure sensor 7 detects the pressure caused by the fluid flow, thereby determining whether the exhaust pressure reaches the preset value and whether the rotor component 2 is started successfully, thereby protecting the compressor structure.

[0049] In the compressor structure of this embodiment, see Figure 7 The control module 4 includes: an intelligent power module 8; a three-phase circuit 9, the three-phase circuit 9 is connected to the intelligent power module 8, and the three-phase circuit 9 is connected to the rotor component 2; the intelligent power module 8 is used to control the current direction of the three-phase circuit 9.

[0050] With the above arrangement, the intelligent power module 8 can control the forward and reverse rotation of the rotor component 2 by adjusting the current flow direction of the three-phase circuit 9, thereby conveniently controlling the direction of the rotor component 2.

[0051] See also Figure 7 In the compressor structure of this embodiment, the compressor structure further includes: a current sensor 91, which is arranged on the three-phase circuit 9; and the current sensor 91 is signal-connected to the control module 4.

[0052] With the above arrangement, the current sensor 91 can detect whether the three-phase circuit 9 is operating abnormally, and detect whether the phases of the three-phase circuit 9 are swapped according to the control requirements, thereby ensuring that the rotor component 2 rotates forward and reverse according to the correct instructions.

[0053] The air conditioner of this embodiment includes a compressor structure, and the compressor structure is the above-mentioned compressor structure.

[0054] Working principle of compressor reverse start, embodiment 1:

[0055] like Figure 1 As shown, when the compressor rotor shaft is controlled by the variable frequency drive to rotate in the forward direction, the suction chamber 11 and the exhaust chamber 12 inside the cylinder 1 of the compressor structure inhale low-temperature and low-pressure refrigerant gas and discharge high-temperature and high-pressure refrigerant gas according to each mechanical frequency.

[0056] like Figure 2 As shown, when the compressor runs at a high frequency, if a system fault or a drive fault occurs and the compressor stops suddenly, the rotor component 2 of the compressor structure is located at a position where the volume of the suction cavity 11 is much larger than the volume of the exhaust cavity 12, and the refrigerant gas pressure in the exhaust cavity 12 has not reached the top opening of the exhaust flange. At this time, the compressor is in a heavy load state. When the compressor is started again, since the variable frequency drive does not have sufficient response time, its output starting torque is insufficient to overcome the compressor load torque, which makes it easy to cause starting overcurrent and other faults.

[0057] like Figure 3 As shown, the variable frequency drive detects the position of the compressor rotor and drives the rotor component 2 of the compressor structure to reverse the mechanical angle by 180°, which can greatly increase the volume of the compressor exhaust chamber 12, reduce the refrigerant gas pressure in the exhaust chamber 12, and at the same time increase the output starting torque response time of the variable frequency drive.

[0058] Compressor reverse start software control process, embodiment 2:

[0059] like Figure 5 As shown, after the initial power-on of the variable frequency drive is completed, after receiving the compressor start-up command, the compressor starts in the forward direction. If the start is successful, the compressor enters the normal operating state. If the start fails, a voltage of a certain amplitude is injected into the 6 basic voltage vectors to detect the initial position of the compressor rotor. After the initial position is determined, the compressor rated current is used as the target value, and the open loop drags the compressor to reverse the mechanical angle by 180° at an electrical frequency of less than 1 Hz, so as to increase the volume of the compressor exhaust chamber 12 and reduce the pressure of the exhaust chamber 12, thereby reducing the compressor starting load and increasing the response time of the variable frequency drive output starting torque. At this time, the compressor starts in the forward direction again, and the success probability can be greatly improved.

[0060] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0061] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0062] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0063] In the above embodiments of the present application, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0064] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A compressor structure, characterized in that: include: A cylinder body (1), wherein the cylinder body (1) has an air intake cavity (11) and an air discharge cavity (12); a rotor component (2), the rotor component (2) being arranged in the cylinder body (1); the rotor component (2) being movably arranged to compress the gas in the suction chamber (11) into the exhaust chamber (12); A detection module (3), the detection module (3) is used to detect the position of the rotor component (2); the detection module (3) is used to detect the motion state of the rotor component (2); A control module (4) controls the rotor component (2) to rotate forward or reverse according to the position of the rotor component (2) and the motion state of the rotor component (2).

2. The compressor structure according to claim 1, characterized in that: The compressor structure comprises a piston component (5), the piston component (5) is relatively movably connected to the cylinder body (1), and the piston component (5) abuts against the rotor component (2); the piston component (5), the rotor component (2) and the inner wall of the cylinder body (1) form the suction cavity (11) and the exhaust cavity (12).

3. The compressor structure according to claim 2, characterized in that: The cylinder body (1) has an accommodating chamber (10), and the accommodating chamber (10) includes the air intake chamber (11) and the air discharge chamber (12); wherein the accommodating chamber (10) is a cylindrical chamber.

4. The compressor structure according to claim 3, characterized in that: The straight line in which the piston component (5) moves is perpendicular to the axis of the accommodating chamber (10).

5. The compressor structure according to claim 1, characterized in that The rotor component (2) is a cylindrical structure.

6. The compressor structure according to claim 1, characterized in that: The compressor structure further comprises an exhaust flange (6), which is movably arranged to close or open the exhaust cavity (12); a position sensor (61) connected to the control module signal is arranged on the exhaust flange (6).

7. The compressor structure according to claim 6, characterized in that: A pressure sensor (7) is provided on the exhaust flange (6), and the pressure sensor (7) is connected to the control module (4) for signal transmission.

8. The compressor structure according to claim 1, characterized in that The control module (4) comprises: Intelligent power module (8); A three-phase circuit (9), the three-phase circuit (9) is connected to the intelligent power module (8), and the three-phase circuit (9) is connected to the rotor component (2); the intelligent power module (8) is used to control the current direction of the three-phase circuit (9).

9. The compressor structure according to claim 8, characterized in that: The compressor structure further comprises: A current sensor (91) is provided on the three-phase circuit (9); the current sensor (91) is signal-connected to the control module (4).

10. An air conditioner comprising a compressor structure, characterized in that: The compressor structure is the compressor structure according to any one of claims 1 to 9.

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