Double-protection safe direct-current compressor

Abstract

The invention relates to a double-protection safe direct-current compressor which is composed of a compressor body and a direct-current brushless motor, and the motor is mechanically connected with the compressor body and electrically connected to an electronic control unit. The electronic control unit integrates key components such as an overvoltage protection circuit, a low-voltage protection circuit, a voltage sensor, a current sensor, a temperature sensor, a rectification filter circuit and a switching power supply. When the voltage exceeds a preset value, the overvoltage and low-voltage protection circuit can cut off the power supply in time to prevent the equipment from being damaged. The voltage and current sensor monitors power and current states in real time, the temperature sensor detects the temperature of key parts of the compressor, the rectifying and filtering circuit converts alternating-current power into direct-current power, and the switching power supply provides low-voltage direct-current power for the electronic control unit. The electronic control unit further comprises a driving module which is used for accurately controlling operation of the motor and adjusting the rotating speed of the compressor.

Description

Technical Field

[0001] The invention provides a direct current compressor, belongs to the technical field of compressor protection, and particularly relates to a double-protection safety direct current compressor. Background Art

[0002] A compressor is a mechanical device used to compress gases to a higher pressure and temperature. It is commonly used in industrial and commercial fields to meet various application needs such as refrigeration, heating, pneumatic tool driving, gas storage and transportation, etc.

[0003] The existing compressors have the following problems during operation: First, the compressor cannot realize the voltage coordination function, that is, it cannot automatically adjust its operating state according to different voltage conditions. Second, the compressor lacks effective speed self-control ability and cannot accurately control its own speed according to actual needs. Finally, the compressor lacks the necessary overvoltage and undervoltage protection mechanism. When the voltage is too high or too low, it is impossible to take protective measures in time to prevent equipment damage. Summary of the invention

[0004] In order to make up for the deficiencies of the prior art, the embodiments of the present application provide a dual-protection safety DC compressor, thereby solving the problems that the traditional compressor cannot automatically adjust the speed when the voltage fluctuates and lacks over-voltage and low-voltage protection.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a double-protection safety DC compressor, comprising a compressor body, the compressor body is mechanically connected to a DC brushless motor, the DC brushless motor is electrically connected to an electronic control unit;

[0006] An electronic control unit, electrically connected to an overvoltage protection circuit, a low voltage protection circuit, a voltage sensor, a current sensor, a temperature sensor, a rectifier filter circuit, and a switching power supply;

[0007] The overvoltage protection circuit and the undervoltage protection circuit are electrically connected to the electronic control unit, respectively, and are used to cut off the power supply when the voltage exceeds a preset value;

[0008] The voltage sensor is electrically connected to the electronic control unit and is used to detect the input voltage;

[0009] The current sensor is electrically connected to the electronic control unit and is used to monitor the current when the compressor is running;

[0010] The temperature sensor is electrically connected to the electronic control unit and is used to detect the temperature of the key parts of the compressor;

[0011] The rectifier and filter circuit is electrically connected to the power input terminal and is used to convert the AC power into a DC power;

[0012] The switching power supply is electrically connected to the output end of the rectifier and filter circuit and is used to provide a low-voltage DC power supply for the electronic control unit.

[0013] Preferably, the electronic control unit further comprises: a drive module, electrically connected to the brushless DC motor, for controlling the operation of the motor.

[0014] Preferably, the compressor body comprises: a cylinder, inside which a piston is arranged; the piston is mechanically connected to a crankshaft; the crankshaft is mechanically connected to a connecting rod; and the connecting rod is mechanically connected to the piston.

[0015] Preferably: a lubrication system is mechanically connected above the compressor body, including: an oil pump, mechanically connected to the compressor body, for conveying lubricating oil; a filter, mechanically connected to the oil pump, for filtering the lubricating oil; an oil circuit, mechanically connected to the oil pump and the compressor body, for guiding the lubricating oil to flow to key parts of the compressor.

[0016] Preferably, an intake and exhaust valve group is provided above the compressor body, comprising: an intake valve, mechanically connected to the compressor body, for controlling the intake of refrigerant; an exhaust valve, mechanically connected to the compressor body, for controlling the discharge of refrigerant.

[0017] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0018] The present invention solves the problems existing in the operation of the existing compressor by providing a double-protection safety DC compressor. First, the electronic control unit of the compressor is electrically connected to the overvoltage protection circuit and the low-voltage protection circuit. When the voltage exceeds the preset value, the power supply can be cut off in time, thereby effectively preventing the equipment from being damaged due to excessively high or low voltage, and realizing the necessary overvoltage and low-voltage protection mechanisms. Secondly, the electronic control unit is also electrically connected to a voltage sensor and a current sensor. The voltage sensor is used to detect the input voltage, and the current sensor is used to monitor the current when the compressor is running. Through the real-time monitoring of these sensors, the electronic control unit can automatically adjust the operating state of the compressor according to different voltage conditions, and realize the voltage coordination function. In addition, the electronic control unit is also electrically connected to a brushless DC motor. By controlling the operation of the motor, the precise control of the compressor speed is realized, which meets the actual needs and makes up for the lack of effective speed self-control ability of the traditional compressor. The rectifier and filter circuit converts the AC power supply into a DC power supply, provides a stable low-voltage DC power supply for the electronic control unit, and ensures the normal operation of the entire system. In summary, the double-protection safety DC compressor of the present invention has been effectively improved and optimized in terms of voltage regulation, speed control, overvoltage and low-voltage protection, etc., and the operating stability and safety of the compressor are improved.

[0019] Other advantages, objectives and features of the present invention will be set forth in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of a double-protection safety DC compressor of the present invention;

[0021] Figure 2 This is a structural diagram of a double-protection safety DC compressor of the present invention;

[0022] Figure 3 This is a flow chart of a double protection safety DC compressor of the present invention;

[0023] Figure 4 A protection circuit diagram of a double-protection safety DC compressor of the present invention;

[0024] Figure 5 This is a waveform diagram of a rectifier and filter circuit of a double-protection safety DC compressor of the present invention;

[0025] As shown in the figure:

[0026] 1. Compressor body; 2. Brushless DC motor;

[0027] 11. Intake valve; 12. Exhaust valve. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0031] like Figure 2, 3 As shown in Figures 4 and 5, the present invention provides a double-protection safety DC compressor to solve the problems of the prior art. The compressor consists of a compressor body 1 and a DC brushless motor 2, the motor is mechanically connected to the compressor body and electrically connected to the electronic control unit. The electronic control unit integrates an overvoltage protection circuit, a low-voltage protection circuit, a voltage sensor, a current sensor, a temperature sensor, a rectifier filter circuit and a switching power supply. The overvoltage and low-voltage protection circuit cuts off the power supply when the voltage is abnormal, the voltage and current sensors monitor the power supply and current status, the temperature sensor detects the temperature of key parts, the rectifier filter circuit converts the AC power supply into a DC power supply, and the switching power supply provides a low-voltage DC power supply for the electronic control unit. The electronic control unit also includes a drive module to control the operation of the motor. The compressor body 1 includes mechanical parts such as a cylinder, a piston, a crankshaft and a connecting rod, and is connected to a lubrication system on the top, including an oil pump, a filter and an oil circuit to ensure that the lubricating oil flows to key parts.

[0032] In this embodiment, a piston is provided inside the cylinder of the compressor body 1, and the piston is mechanically connected to the crankshaft through a connecting rod, and the crankshaft is connected to the brushless DC motor 2, so as to realize the conversion of the mechanical energy of the motor into the compression action of the compressor. During the operation of the compressor, the electronic control unit receives signals from the voltage sensor, the current sensor and the temperature sensor in real time, and accurately monitors the operating state of the compressor. When the input voltage or current exceeds the preset safety range, the overvoltage protection circuit or the low-voltage protection circuit will start immediately, cut off the power supply, and prevent the compressor from being damaged due to abnormal voltage. At the same time, the electronic control unit adjusts the speed of the brushless DC motor through the drive module according to the data fed back by the sensor, so that the compressor can operate efficiently and stably under different working conditions. The oil pump in the lubrication system delivers the lubricating oil to the filter for filtration, and then delivers the clean lubricating oil to the key parts of the compressor, such as the cylinder, piston, crankshaft and connecting rod, through the oil circuit, to reduce friction, reduce wear, and extend the service life of the compressor. In addition, an air intake and exhaust valve group is also provided above the compressor body 1, and the air intake valve controls the suction of the refrigerant, and the exhaust valve controls the discharge of the refrigerant to ensure the normal working cycle of the compressor. Through the above-mentioned structural design and control strategy, the dual-protection safety DC compressor of the present invention performs well in voltage regulation, speed control, overvoltage and low-voltage protection, etc., effectively solves the problems existing in the operation of existing compressors, improves the operating stability and safety of the compressor, and has broad application prospects and good market potential.

[0033] like Figure 1As shown, an air intake and exhaust valve group is also provided above the compressor body 1, which is composed of an air intake valve and an exhaust valve, and controls the intake and exhaust of the refrigerant respectively. Through the above structural design, the double-protection safety DC compressor of the present invention realizes the automatic adjustment and protection function when the voltage fluctuates, improves the operating stability and safety of the compressor, and prolongs the service life of the equipment.

[0034] In this embodiment, a piston is provided inside the cylinder of the compressor body 1, and the piston is mechanically connected to the crankshaft through a connecting rod, and the crankshaft is connected to the brushless DC motor 2 to realize the conversion of the mechanical energy of the motor to the compression action of the compressor. As a core control component, the electronic control unit integrates a variety of functional modules and sensors to monitor and adjust the operating status of the compressor in real time. When the voltage sensor detects that the input voltage is abnormal, the electronic control unit will quickly start the overvoltage or low voltage protection circuit, cut off the power supply, and prevent the compressor from being damaged by voltage fluctuations. At the same time, the current sensor and the temperature sensor respectively monitor the current and the temperature of the key parts of the compressor during operation to ensure that the compressor operates within a safe range. The electronic control unit also includes a drive module, which accurately controls the speed of the brushless DC motor according to actual needs, so that the compressor can operate efficiently and stably under different working conditions. The oil pump in the lubrication system delivers the lubricating oil to the filter for filtration, and then delivers the clean lubricating oil to the key parts of the compressor through the oil circuit, reducing friction, reducing wear, and further extending the service life of the compressor. Through these optimized designs and intelligent controls, the dual-protection safety DC compressor of the present invention improves the operational stability and safety while also improving the energy efficiency and reliability of the equipment, meeting the higher requirements for compressor performance in modern industrial and commercial fields, and has broad application prospects and market competitiveness.

[0035] When in use, first place the compressor in a suitable working position, connect the power cord and refrigerant pipeline, and ensure that the suction valve and exhaust valve are in the correct working state so that the refrigerant can be smoothly inhaled and discharged; then, turn on the power switch, the rectifier filter circuit converts the input AC power into DC power, the switching power supply provides low-voltage DC power to the electronic control unit, the electronic control unit starts immediately, and the voltage sensor, current sensor and temperature sensor begin to monitor the operating parameters of the compressor in real time; when the compressor is started, the electronic control unit adjusts the speed of the DC brushless motor through the drive module according to the data fed back by the sensor, so that the compressor operates according to the preset working mode; during the operation of the compressor, if the electronic control unit detects an abnormal voltage, such as too high or too low, the overvoltage protection circuit or the low-voltage protection circuit will immediately cut off the power supply to prevent the compressor from being damaged; at the same time, the oil pump in the lubrication system delivers the lubricating oil to the filter for filtration, and then delivers it to the key parts of the compressor through the oil circuit to ensure the normal operation of the compressor and reduce wear; during the entire use process, the user can view the operating status of the compressor in real time through the interface of the electronic control unit, and make corresponding parameter adjustments as needed to meet different working requirements, thereby achieving efficient, stable and safe operation of the compressor.

[0036] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the claims.

Claims

1. A double-protection safety DC compressor, comprising a compressor body (1), characterized in that: The compressor body (1) is mechanically connected to a brushless DC motor (2), and the brushless DC motor (2) is electrically connected to an electronic control unit; An electronic control unit, electrically connected to an overvoltage protection circuit, a low voltage protection circuit, a voltage sensor, a current sensor, a temperature sensor, a rectifier filter circuit, and a switching power supply; The overvoltage protection circuit and the undervoltage protection circuit are electrically connected to the electronic control unit, respectively, and are used to cut off the power supply when the voltage exceeds a preset value; The voltage sensor is electrically connected to the electronic control unit and is used to detect the input voltage; The current sensor is electrically connected to the electronic control unit and is used to monitor the current when the compressor is running; The temperature sensor is electrically connected to the electronic control unit and is used to detect the temperature of the key parts of the compressor; The rectifier and filter circuit is electrically connected to the power input terminal and is used to convert the AC power into a DC power; The switching power supply is electrically connected to the output end of the rectifier and filter circuit and is used to provide a low-voltage DC power supply for the electronic control unit.

2. A double protection safety DC compressor according to claim 1, characterized in that: The electronic control unit further comprises: a drive module electrically connected to the brushless DC motor (2) and used for controlling the operation of the motor.

3. A double protection safety DC compressor according to claim 1, characterized in that: The compressor body (1) comprises: a cylinder, inside which a piston is arranged; the piston is mechanically connected to a crankshaft; the crankshaft is mechanically connected to a connecting rod; and the connecting rod is mechanically connected to the piston.

4. A double protection safety DC compressor according to claim 1, characterized in that: A lubrication system is mechanically connected above the compressor body (1), comprising: an oil pump, mechanically connected to the compressor body (1) and used to transport lubricating oil; a filter, mechanically connected to the oil pump and used to filter the lubricating oil; and an oil circuit, mechanically connected to the oil pump and the compressor body (1) and used to guide the lubricating oil to flow to key parts of the compressor.

5. A double protection safety DC compressor according to claim 1, characterized in that: An intake and exhaust valve group is provided above the compressor body (1), comprising: an intake valve (11), mechanically connected to the compressor body (1), and used to control the intake of refrigerant; and an exhaust valve (12), mechanically connected to the compressor body (1), and used to control the discharge of refrigerant.

Images