Compressor power-off protection method, device and system, compressor, medium and product

Abstract

The invention relates to a compressor power-off protection method, device and system, a compressor, a medium and a product. When the compressor is powered on, electric energy is stored through the energy storage circuit, when a power-off signal is detected, the electric energy is provided for the controller and the electric emptying valve through the energy storage circuit, a control command is sent to the electric emptying valve through the controller, the control command is received through the electric emptying valve, and the opening degree of the electric emptying valve is adjusted to the set opening degree based on the control command. Compared with the prior art, when the compressor is powered on, electric energy is stored through the energy storage circuit, when the power-off signal is detected, the electric energy is provided for the controller and the electric emptying valve through the energy storage circuit, the control command is sent to the electric emptying valve through the controller, and the control command is received through the electric emptying valve; and the opening degree of the electric emptying valve is adjusted to the set opening degree based on the control command, so that the electric emptying valve can be opened during compression outage, compressed gas in the compressor is exhausted, and safe operation of the compressor is protected.

Description

Technical Field

[0001] The present disclosure relates to the technical field of compressors, and in particular to a compressor power-off protection method, device, system, compressor, medium and product. Background Art

[0002] Centrifugal compressors rely on the rotation of the impeller to achieve work on compressing the gas. During use, they may encounter power outages or unexpected shutdowns. At this time, the impeller loses energy drive, but due to inertia, it will still rotate for a short period of time after shutdown and will still perform work on compressing the gas.

[0003] However, since the compressor is in a shutdown state, various adjustment measures are paralyzed and the compressor cannot be adjusted. This part of compressed gas may impact the compressor and cause unnecessary damage to the compressor. Summary of the invention

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a compressor power-off protection method, device, system, compressor, medium and product, which can realize the function of automatically opening the electric vent valve when the compressor power is abnormally cut off, thereby protecting the safe operation of the compressor.

[0005] In a first aspect, an embodiment of the present disclosure provides a compressor power-off protection method, the method comprising: When the compressor is powered on, electrical energy is stored through the energy storage circuit; When a power failure signal is detected, the energy storage circuit provides power to the controller and the electric drain valve; Send a control command to the electric vent valve through the controller; The control command is received by the electric drain valve, and the opening of the electric drain valve is adjusted to a set opening based on the control command.

[0006] In some embodiments, when a power-off signal is detected, before providing power to the controller and the electric vent valve through the energy storage circuit, the method further includes: A power-off signal is detected by a power-off identification circuit, and the power-off signal is transmitted to the controller.

[0007] In some embodiments, sending a control command to the electric vent valve through a controller includes: Receiving a power-off signal transmitted by the power-off identification circuit through a controller; A control command is sent to the electric vent valve by the controller based on the power-off signal.

[0008] In some embodiments, the energy storage circuit is composed of a single-phase full-bridge rectifier circuit, a resistor, a diode, and a capacitor; the energy storage circuit is used to store electrical energy using the alternating current generated when the compressor is powered on, and release electrical energy when the compressor is powered off, so that the controller and the electric drain valve can operate normally.

[0009] In some embodiments, the energy storage circuit includes a control energy storage circuit and a power energy storage circuit; The control energy storage circuit includes a first capacitor, and the power energy storage circuit includes a second capacitor; the first capacitor is used to release electric energy when the compressor is powered off, and provide electric energy to the controller so that the controller can work normally; the second capacitor is used to release electric energy when the compressor is powered off, and provide electric energy to the electric drain valve so that the electric drain valve can work normally; The electric energy stored in the second capacitor must be sufficient to continuously provide electric energy to the electric drain valve for a target time, and the first time threshold ≤ the target time ≤ the second time threshold.

[0010] In some embodiments, storing electrical energy by an energy storage circuit includes: Charging the first capacitor in the control energy storage circuit through the first single-phase full-bridge rectifier circuit; The second capacitor in the power energy storage circuit is charged through the second single-phase full-bridge rectifier circuit.

[0011] In some embodiments, providing electrical energy to the controller and the electric vent valve through the energy storage circuit includes: Releasing electric energy through the first capacitor in the control energy storage circuit to provide electric energy for the controller; The electric energy is released through the second capacitor in the power energy storage circuit to provide electric energy for the electric drain valve.

[0012] In a second aspect, an embodiment of the present disclosure provides a compressor power-off protection device, the device comprising: The electric energy storage module is used to store electric energy through an energy storage circuit when the compressor is powered on. The energy storage circuit is composed of a single-phase full-bridge rectifier circuit, a resistor, a diode, and a capacitor. The energy storage circuit is used to store electric energy using the alternating current generated when the compressor is powered on, and release the electric energy when the compressor is powered off, so that the controller and the electric drain valve can work normally. An electric energy module is provided, which is used to provide electric energy to the controller and the electric drain valve through the energy storage circuit when a power failure signal is detected; A sending module, used for sending a control command to the electric vent valve through a controller; The protection module is used to receive the control command through the electric drain valve and adjust the opening of the electric drain valve to a set opening based on the control command.

[0013] In a third aspect, an embodiment of the present disclosure provides a compressor power failure protection system, the system comprising an energy storage circuit, a controller, and an electric vent valve; The energy storage circuit is used to store electrical energy and provide electrical energy to the controller and the electric vent valve; The controller is used to send a control command to the electric vent valve; The electric drain valve is used to receive the control command and adjust the opening of the electric drain valve to a set opening based on the control command.

[0014] In a fourth aspect, an embodiment of the present disclosure provides a compressor, comprising the compressor power-off protection device as described in the second aspect, or the compressor power-off protection system as described in the third aspect.

[0015] In a fifth aspect, an embodiment of the present disclosure provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program is executed by a processor to implement the method as described in the first aspect.

[0016] In a sixth aspect, an embodiment of the present disclosure further provides a computer program product, which includes a computer program or instructions, and when the computer program or instructions are executed by a processor, the method described in the first aspect is implemented.

[0017] The compressor power-off protection method, device, system, compressor, medium and product provided by the embodiment of the present disclosure store electric energy through the energy storage circuit when the compressor is powered on, and provide electric energy to the controller and the electric vent valve through the energy storage circuit when a power-off signal is detected, send a control command to the electric vent valve through the controller, receive the control command through the electric vent valve, and adjust the opening of the electric vent valve to the set opening based on the control command. Compared with the prior art, the embodiment of the present disclosure stores electric energy through the energy storage circuit when the compressor is powered on, and provide electric energy to the controller and the electric vent valve through the energy storage circuit when a power-off signal is detected, and further, send a control command to the electric vent valve through the controller, receive the control command through the electric vent valve, and adjust the opening of the electric vent valve to the set opening based on the control command, so that the electric vent valve can be opened when the compressor is powered off to discharge the compressed gas in the compressor, and the function of automatically opening the electric vent valve when the compressor power supply is abnormally powered off can be realized, thereby protecting the safe operation of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0019] 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, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 A flow chart of a compressor power-off protection method provided by an embodiment of the present disclosure; Figure 2 A flow chart of a compressor power-off protection method provided by another embodiment of the present disclosure; Figure 3 A circuit schematic diagram of a compressor power failure protection system provided by an embodiment of the present disclosure; Figure 4 A schematic diagram of the current flow for charging a capacitor provided in an embodiment of the present disclosure; Figure 5 A schematic diagram of the current flow direction of capacitor discharge provided in an embodiment of the present disclosure; Figure 6 A schematic diagram of the structure of a compressor power-off protection device provided in an embodiment of the present disclosure; Figure 7 A schematic structural diagram of a compressor power-off protection system provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0021] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0023] Centrifugal compressors rely on the rotation of the impeller to achieve work on compressing the gas. During use, they may encounter power outages or unexpected shutdowns. At this time, the impeller loses energy drive, but due to inertia, it will still rotate for a short period of time after shutdown and will still perform work on compressing the gas.

[0024] However, since the compressor is in a shutdown state, various adjustment measures are paralyzed and the compressor cannot be adjusted. This part of compressed gas may impact the compressor and cause unnecessary damage to the compressor.

[0025] To address this problem, an embodiment of the present disclosure provides a compressor power-off protection method, which is described below in conjunction with a specific embodiment.

[0026] Figure 1 The flowchart of the compressor power-off protection method provided in the embodiment of the present disclosure. The executor of the method is a compressor. The method can be applied to the scenario of power-off protection of the compressor, and can also be applied to the scenario of opening the electric vent valve when the compressor is powered off. The function of automatically opening the electric vent valve when the compressor power is abnormally powered off can be realized, thereby protecting the safe operation of the compressor. It is understandable that the compressor power-off protection method provided in the embodiment of the present disclosure can also be applied in other scenarios.

[0027] Below Figure 1 The compressor power-off protection method shown in the figure is introduced, and the specific steps of the method are as follows: S101. When the compressor is powered on, electrical energy is stored in the energy storage circuit.

[0028] In this step, when the compressor is powered normally, the electric energy is stored through the energy storage circuit. Figure 3 As shown, when the AC220V power supply (host power supply) is normally powered, the entire control circuit is powered by the AC220V power supply, and when current passes through the energy storage circuit, the energy storage circuit stores electrical energy.

[0029] Optionally, the energy storage circuit is composed of a single-phase full-bridge rectifier circuit, a resistor, a diode, and a capacitor; the energy storage circuit is used to store electrical energy using the alternating current generated when the compressor is powered on, and release the electrical energy when the compressor is powered off, so that the controller and the electric drain valve can operate normally.

[0030] In some embodiments, the energy storage circuit includes a control energy storage circuit and a power energy storage circuit; the control energy storage circuit includes a first capacitor, and the power energy storage circuit includes a second capacitor. Figure 3 As shown, the AC-to-DC device in the control energy storage circuit will charge the first capacitor C1 through the internal first single-phase full-bridge rectifier circuit, and the servo BOV in the power energy storage circuit will also charge the second capacitor C2 through the internal second single-phase full-bridge rectifier circuit. The first capacitor is used to release electrical energy when the compressor is powered off, and provide electrical energy to the controller so that the controller can work normally; the second capacitor is used to release electrical energy when the compressor is powered off, and provide electrical energy to the electric drain valve so that the electric drain valve can work normally. The electrical energy stored in the second capacitor must meet the target time for continuously providing electrical energy to the electric drain valve, and the first time threshold ≤ the target time ≤ the second time threshold. In some embodiments, the first time threshold is 5s, and the second time threshold is 30s, or other values, without specific limitation.

[0031] In some embodiments, the energy storage circuit is composed of a single-phase full-bridge rectifier circuit, a resistor, a diode, and a capacitor.

[0032] Specifically, the single-phase full-bridge rectifier circuit, resistor, capacitor in the energy storage circuit are connected in series with the AC220V power supply, and the diode is connected in parallel at both ends of the resistor. When the compressor is powered on, energy is stored, and the current flows from the AC220V power supply, through the single-phase full-bridge rectifier circuit, to the resistor, and then to the capacitor. When the compressor is powered off, the current flows out of the circuit where the diode is located to power the controller and the electric drain valve.

[0033] Single-phase full-bridge rectifier circuit: used to convert AC power I ac Converted to direct current I dc When selecting a single-phase full-bridge rectifier circuit model, the load capacity should be considered, and the load capacity should not be less than its actual load, otherwise it will be overloaded.

[0034] Resistors: Since the resistance of a capacitor is 0, and since current = voltage / resistance, if the capacitor is directly connected to the charging circuit, the charging current is equivalent to infinity, which will instantly damage the capacitor. Therefore, a resistor is added to limit the charging current of the capacitor and protect the capacitor. When selecting the resistor model, the capacitor charging time τ, charging current I, its own power P, and resistance value should be considered. The capacitor charging time τ is selected according to the actual use situation, preferably 1min≤τ≤30min. If the charging time is too short, the charging current will be large and will damage the capacitor. If the charging time is too long, there is a risk that the capacitor cannot be fully charged before the next power failure, resulting in a discharge time that is too short and the electric vent valve (BOV) cannot be opened. Optionally, the resistance value of the resistor can be calculated according to the formula "resistance value of the resistor = capacitor charging time τ / (5×capacitance of capacitor C)", and further calculated according to "charging current I=DC I dc The charging current can be calculated by "voltage / resistance value of resistor". The charging current I should be 10mA≤I≤500mA. If the calculated current is too small, it is necessary to reduce the capacitor charging time τ and recalculate the charging current. If the calculated current is too large, it is necessary to increase the capacitor charging time τ and recalculate the charging current until the charging time τ and the charging current I are both in the appropriate range. At this time, the power P1 is calculated according to the formula "power P1=charging current I / resistance value of resistor". The power P1 is the minimum power required by the resistor. The actual power P of the resistor should be P1≤P≤5×P1. If it is too small, it is easy to be overloaded and damaged, and if it is too large, it is not economical.

[0035] Diode: Using the unidirectional conductivity of the diode, when the capacitor is charging, the circuit where the diode is located cannot conduct electricity, so that the charging current can pass through the circuit where the resistor is located to charge the capacitor. When the capacitor is discharging, the resistance of the circuit where the diode is located is 0, and the resistance value is much smaller than the circuit where the resistor is located. Therefore, the circuit where the resistor is located is short-circuited by the diode, so that the discharge current can pass through the circuit where the diode is located, avoiding the resistor from consuming the capacitor's power. When selecting the diode model, the capacitor's discharge current I should be considered out According to the formula "discharge current I out = Actual load power Pr / DC current I dc The discharge current I is calculated from the voltage out , the diode's carrying current value I d I out ≤I d ≤5×I out If it is too small, it may be overloaded and damaged, while if it is too large, it will be uneconomical.

[0036] Capacitor C: stores and releases electric energy. When selecting the model of capacitor C, the target time T should be considered, that is, the electric energy E stored in the capacitor needs to be able to continuously provide electric energy to the electric drain valve. The target time T should be 5s≤T≤30s. If the time is too short, the electric drain valve will not be able to open. If the time is too long, the economy will be poor. The electric energy E stored in the capacitor is calculated according to the formula "Electric energy E stored in the capacitor = time T × actual load power Pr", and the capacity of the capacitor C is further determined based on the electric energy E stored in the capacitor.

[0037] like Figure 4 As shown in the figure, when the compressor is powered on, the current flows from the positive pole of the AC220V power supply to the single-phase full-bridge rectifier circuit, to the resistor, to the capacitor, and finally to the negative pole of the power supply. During this process, the energy storage circuit stores electrical energy, which is actually charging the capacitor. When the AC220V power supply is powered, the capacitor is charged. First, the AC power is converted into DC power through the single-phase full-bridge rectifier circuit. Since the diode D has unidirectional conductivity, the DC power can only pass through the circuit where the resistor R is located, and the capacitor is charged after the current is limited by R.

[0038] S102: When a power-off signal is detected, the energy storage circuit provides electrical energy to the controller and the electric drain valve.

[0039] In this step, when a power-off signal is detected, i.e., the compressor is powered off, the energy storage circuit provides electrical energy to the controller and the electric drain valve. Specifically, the energy storage circuit releases the stored electrical energy to power the controller and the electric drain valve.

[0040] like Figure 5As shown in the figure, when the compressor is powered off, the current flows from the positive electrode of the capacitor to the diode, to the resistor, to the single-phase full-bridge rectifier circuit, and finally to the negative electrode of the capacitor. In this process, the energy storage circuit provides electrical energy, which is actually the discharge of the capacitor. When the AC220V power supply is powered off, the capacitor discharges. At this time, the single-phase full-bridge rectifier circuit stops working, the capacitor begins to discharge, and the discharge current flows out of the circuit where the diode is located to power the controller and the electric drain valve. The power supply for the electric drain valve is realized through a simple circuit, and the power supply is switched without interference according to the physical characteristics of each electrical component, avoiding complex logic control, and having the characteristics of high reliability.

[0041] S103, sending a control command to the electric vent valve through the controller.

[0042] In this step, the compressor sends a control command to the electric vent valve through the controller. Figure 3 As shown, the controller (PLC) sends a control command to the electric blow-off valve (BOV). Optionally, the control command is a command to open the electric blow-off valve, and specifically, it can be a command to adjust the electric blow-off valve to a set opening.

[0043] S104, receiving the control command through the electric drain valve, and adjusting the opening of the electric drain valve to a set opening based on the control command.

[0044] In this step, the electric vent valve in the compressor receives the control command and adjusts the opening of the electric vent valve to the set opening according to the control command. Figure 3 As shown in the figure, the electric blow-off valve (BOV) opens according to the control command, so that after the power supply of the compressor is cut off, the electric blow-off valve can open normally to discharge the compressed gas in the compressor. The electric blow-off valve is used to discharge the compressor flow. According to specific needs, the opening of the electric blow-off valve can be adjusted from fully open to fully closed, and the opening size can be adjusted according to needs.

[0045] In the embodiment of the present disclosure, when the compressor is powered on, electric energy is stored through the energy storage circuit. When a power-off signal is detected, electric energy is provided to the controller and the electric drain valve through the energy storage circuit. A control command is sent to the electric drain valve through the controller, and the control command is received by the electric drain valve. Based on the control command, the opening of the electric drain valve is adjusted to the set opening. Compared with the prior art, in the embodiment of the present disclosure, when the compressor is powered on, electric energy is stored through the energy storage circuit. When a power-off signal is detected, electric energy is provided to the controller and the electric drain valve through the energy storage circuit. Furthermore, a control command is sent to the electric drain valve through the controller, and the control command is received by the electric drain valve. Based on the control command, the opening of the electric drain valve is adjusted to the set opening. The electric drain valve can be opened when the compressor is powered off to discharge the compressed gas in the compressor. The function of automatically opening the electric drain valve when the compressor power is abnormally powered off can be realized, thereby protecting the safe operation of the compressor.

[0046] Figure 2 A flow chart of a compressor power-off protection method provided by another embodiment of the present disclosure is shown in FIG. Figure 2 As shown, the method includes the following steps: S201. Charge a first capacitor in the control energy storage circuit through a first single-phase full-bridge rectifier circuit.

[0047] In this step, the compressor charges the first capacitor in the control energy storage circuit through the first single-phase full-bridge rectifier circuit. Figure 3 As shown, when the AC220V power supply (host power supply) of the compressor is normally powered, the AC-to-DC device in the control energy storage circuit will charge the first capacitor C1 through the internal first single-phase full-bridge rectifier circuit. The current flows from the positive electrode of the AC220V power supply to the single-phase full-bridge rectifier circuit, to the first resistor R1, to the first capacitor C1, and finally to the negative electrode of the power supply to charge the first capacitor.

[0048] S202, charging the second capacitor in the power energy storage circuit through the second single-phase full-bridge rectifier circuit.

[0049] In this step, the compressor will charge the second capacitor in the power energy storage circuit through the second single-phase full-bridge rectifier circuit. Figure 3 As shown, when the AC220V power supply (host power supply) of the compressor is normally powered, the power storage circuit will charge the second capacitor C2 through the internal second single-phase full-bridge rectifier circuit. The current flows from the positive electrode of the AC220V power supply to the single-phase full-bridge rectifier circuit, to the second resistor R2, to the second capacitor C2, and finally to the negative electrode of the power supply to charge the second capacitor.

[0050] S203: Detect a power-off signal through a power-off identification circuit, and transmit the power-off signal to the controller.

[0051] In this step, the compressor detects a power-off signal through a power-off identification circuit and transmits the power-off signal to the controller. Figure 3 As shown, when the AC220V power supply is cut off, the KA1 coil loses power, that is, the power-off identification circuit detects the power-off signal and transmits the power-off signal to the controller (PLC) through the KA1 contact.

[0052] S204: When a power-off signal is detected, the energy storage circuit provides electrical energy to the controller and the electric drain valve.

[0053] Specifically, the implementation process and principle of S204 and S102 are the same, and will not be repeated here.

[0054] In some embodiments, S204 includes but is not limited to S2041 and S2042: S2041. Release electric energy through the first capacitor in the control energy storage circuit to provide electric energy for the controller.

[0055] When the AC220V power supply is cut off, capacitor C1 will discharge and supply power to the controller (PLC) instead of the AC220V power supply, so that the controller can still have power after the power supply is cut off and can send a control command to the BOV, so that the BOV adjusts the opening of the electric vent valve to the set opening based on the control command.

[0056] S2042. Release electric energy through the second capacitor in the power energy storage circuit to provide electric energy for the electric drain valve.

[0057] When the AC220V power supply is cut off, capacitor C2 will discharge and replace the AC220V power supply to supply power to the electric blow-off valve (BOV), so that the electric blow-off valve can still have power after the power is cut off and can continue to run to execute the control command, adjusting the opening of the electric blow-off valve to the set opening, thereby achieving the electric blow-off valve can be opened normally after the compressor power is cut off.

[0058] S205: Receive, via a controller, a power-off signal transmitted by the power-off identification circuit.

[0059] In this step, after the energy storage circuit provides electric energy to the controller, the controller can receive the power-off signal transmitted by the power-off identification circuit.

[0060] S206. Sending a control command to the electric vent valve based on the power-off signal via the controller.

[0061] In this step, the compressor sends a control command to the electric vent valve through the controller based on the power-off signal. Figure 3 As shown, the controller sends the control command to the electric vent valve through the PLC-BOV control signal line.

[0062] S207, receiving the control command through the electric drain valve, and adjusting the opening of the electric drain valve to a set opening based on the control command.

[0063] Specifically, the implementation process and principle of S207 and S104 are the same, and will not be repeated here.

[0064] In the embodiment of the present disclosure, the first capacitor in the control energy storage circuit is charged by the first single-phase full-bridge rectifier circuit, and the second capacitor in the power energy storage circuit is charged by the second single-phase full-bridge rectifier circuit. Further, the power-off signal is detected by the power-off identification circuit, and the power-off signal is transmitted to the controller. When the power-off signal is detected, the controller and the electric drain valve are provided with electric energy by the energy storage circuit. Then, the power-off signal transmitted by the power-off identification circuit is received by the controller, and the control command is sent to the electric drain valve based on the power-off signal by the controller. Then, the control command is received by the electric drain valve, and the opening of the electric drain valve is adjusted to the set opening based on the control command. Compared with the prior art, the embodiment of the present disclosure can open the electric drain valve when the compression power is cut off to discharge the compressed gas in the compressor, and can realize the function of automatically opening the electric drain valve when the compressor power supply is abnormally cut off, thereby protecting the safe operation of the compressor. The electric drain valve is powered by a simple circuit, and the power supply is switched without disturbance according to the physical characteristics of each electrical component, avoiding complex logic control, and having the characteristics of high reliability.

[0065] Figure 6 The schematic diagram of the structure of the compressor power-off protection device provided in the embodiment of the present disclosure. The compressor power-off protection device can be the resource management system described in the above embodiment, or the compressor power-off protection device can be a component or assembly in the resource management system. The compressor power-off protection device provided in the embodiment of the present disclosure can execute the processing flow provided in the compressor power-off protection method embodiment, such as Figure 6 As shown, the compressor power-off protection device 40 includes: an electric energy storage module 41, an electric energy supply module 42, a sending module 43, and a protection module 44; wherein, the electric energy storage module 41 is used to store electric energy through the energy storage circuit when the compressor is powered on; the electric energy supply module 42 is used to provide electric energy to the controller and the electric drain valve through the energy storage circuit when a power-off signal is detected; the sending module 43 is used to send a control command to the electric drain valve through the controller; the protection module 44 is used to receive the control command through the electric drain valve, and adjust the opening of the electric drain valve to the set opening based on the control command.

[0066] Optionally, when a power-off signal is detected, before providing power to the controller and the electric vent valve through the energy storage circuit, the device 40 also includes: a detection module 45; the detection module 45 is used to detect the power-off signal through the power-off identification circuit and transmit the power-off signal to the controller.

[0067] Optionally, when the sending module 43 sends a control command to the electric drain valve through the controller, it is specifically used to: receive a power-off signal transmitted by the power-off identification circuit through the controller; and send a control command to the electric drain valve based on the power-off signal through the controller.

[0068] Optionally, the energy storage circuit includes a control energy storage circuit and a power energy storage circuit; the control energy storage circuit includes a first capacitor, and the power energy storage circuit includes a second capacitor.

[0069] Optionally, when the electric energy storage module 41 stores electric energy through the energy storage circuit, it is specifically used to: charge the first capacitor in the control energy storage circuit through the first single-phase full-bridge rectifier circuit; and charge the second capacitor in the power energy storage circuit through the second single-phase full-bridge rectifier circuit.

[0070] Optionally, when the power providing module 42 provides power to the controller and the electric drain valve through the energy storage circuit, it is specifically used to: release power through the first capacitor in the control energy storage circuit to provide power to the controller; release power through the second capacitor in the power energy storage circuit to provide power to the electric drain valve.

[0071] Figure 6 The compressor power-off protection device of the illustrated embodiment can be used to implement the technical solution of the above-mentioned method embodiment. Its implementation principle and technical effect are similar and will not be repeated here.

[0072] An embodiment of the present disclosure also provides a compressor power-off protection system, which includes an energy storage circuit, a controller, and an electric drain valve; the energy storage circuit is used to store electrical energy and provide electrical energy to the controller and the electric drain valve; the controller is used to send a control command to the electric drain valve; the electric drain valve is used to receive the control command and adjust the opening of the electric drain valve to a set opening based on the control command.

[0073] Optionally, the compressor power-off protection system further includes: a power-off identification circuit; the power-off identification circuit is used to detect a power-off signal and transmit the power-off signal to the controller.

[0074] Optionally, when the controller sends a control command to the electric drain valve, it is specifically used to: receive a power-off signal transmitted by the power-off identification circuit; and send a control command to the electric drain valve based on the power-off signal.

[0075] Optionally, the energy storage circuit includes a control energy storage circuit and a power energy storage circuit; the control energy storage circuit includes a first capacitor, and the power energy storage circuit includes a second capacitor.

[0076] Optionally, when the energy storage circuit stores electrical energy, it is specifically used to: charge the first capacitor in the control energy storage circuit through a first single-phase full-bridge rectifier circuit; and charge the second capacitor in the power energy storage circuit through a second single-phase full-bridge rectifier circuit.

[0077] Optionally, when the energy storage circuit provides electrical energy for the controller and the electric drain valve, it is specifically used to: release electrical energy through the first capacitor in the control energy storage circuit to provide electrical energy for the controller; release electrical energy through the second capacitor in the power energy storage circuit to provide electrical energy for the electric drain valve.

[0078] Figure 7 This is a schematic diagram of the structure of a compressor power failure protection system in an embodiment of the present disclosure. Figure 7 , which shows a structural schematic diagram of a compressor power-off protection system 600 suitable for implementing the embodiment of the present disclosure. Figure 7 The compressor power failure protection system shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present disclosure.

[0079] like Figure 7 As shown, the compressor power-off protection system 600 may include a processing device (e.g., a central processing unit, a graphics processing unit, etc.) 601, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 602 or a program loaded from a storage device 608 to a random access memory (RAM) 603 to implement the compressor power-off protection system power-off protection method of the embodiment described in the present disclosure. In RAM 603, various programs and data required for the operation of the compressor power-off protection system 600 are also stored. The processing device 601, ROM 602, and RAM 603 are connected to each other via a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.

[0080] Typically, the following devices may be connected to the I / O interface 605: an input device 606 including, for example, a touch screen, a touch pad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, etc.; an output device 607 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; a storage device 608 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 609. The communication device 609 may allow the compressor power failure protection system 600 to communicate with other devices wirelessly or by wire to exchange data. Although Figure 7 The compressor power-off protection system 600 is shown with various devices, but it should be understood that it is not required to implement or have all the devices shown. More or fewer devices may be implemented or have instead.

[0081] In particular, according to an embodiment of the present disclosure, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present disclosure includes a computer program product, which includes a computer program carried on a non-transitory computer-readable medium, and the computer program contains program code for executing the method shown in the flowchart, thereby implementing the compressor power-off protection system power-off protection method as described above. In such an embodiment, the computer program can be downloaded and installed from the network through the communication device 609, or installed from the storage device 608, or installed from the ROM 602. When the computer program is executed by the processing device 601, the above-mentioned functions defined in the method of the embodiment of the present disclosure are executed.

[0082] It should be noted that the computer-readable medium mentioned above in the present disclosure may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, device or device. In the present disclosure, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable program code. This propagated data signal may take a variety of forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination of the above. Computer readable signal media may also be any computer readable medium other than computer readable storage media, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, apparatus or device. The program code contained on the computer readable medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (radio frequency), etc., or any suitable combination of the above.

[0083] In some embodiments, the client and the server may communicate using any currently known or future developed network protocol such as HTTP (HyperText Transfer Protocol), and may be interconnected with any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network ("LAN"), a wide area network ("WAN"), an internet (e.g., the Internet), and a peer-to-peer network (e.g., an ad hoc peer-to-peer network), as well as any currently known or future developed network.

[0084] The computer-readable medium may be included in the compressor power-off protection system; or may exist independently without being assembled into the compressor power-off protection system.

[0085] The computer-readable medium carries one or more programs. When the one or more programs are executed by the compressor power-off protection system, the compressor power-off protection system: When the compressor power-off protection system is energized, electrical energy is stored through the energy storage circuit; When a power failure signal is detected, the energy storage circuit provides power to the controller and the electric drain valve; Send a control command to the electric vent valve through the controller; The control command is received by the electric drain valve, and the opening of the electric drain valve is adjusted to a set opening based on the control command.

[0086] Optionally, when the above one or more programs are executed by the compressor power-off protection system, the compressor power-off protection system can also execute other steps described in the above embodiments.

[0087] Computer program code for performing the operations of the present disclosure may be written in one or more programming languages ​​or a combination thereof, including, but not limited to, object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0088] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present disclosure. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some implementations as replacements, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0089] The units involved in the embodiments described in the present disclosure may be implemented by software or hardware, wherein the name of a unit does not, in some cases, limit the unit itself.

[0090] The functions described above herein may be performed at least in part by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), and the like.

[0091] In the context of the present disclosure, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any suitable combination of the foregoing. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0092] The above description is only a preferred embodiment of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of disclosure involved in the present disclosure is not limited to the technical solutions formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present disclosure (but not limited to) by each other to form a technical solution.

[0093] In addition, although each operation is described in a specific order, this should not be understood as requiring these operations to be performed in the specific order shown or in a sequential order. Under certain circumstances, multitasking and parallel processing may be advantageous. Similarly, although some specific implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the present disclosure. Some features described in the context of a separate embodiment can also be implemented in a single embodiment in combination. On the contrary, the various features described in the context of a single embodiment can also be implemented in multiple embodiments individually or in any suitable sub-combination mode.

[0094] Although the subject matter has been described in language specific to structural features and / or methodological logical actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions described above are merely example forms of implementing the claims.

Claims

1. A compressor power-off protection method, characterized in that: The method comprises: When the compressor is powered on, electrical energy is stored through the energy storage circuit; When a power failure signal is detected, the energy storage circuit provides power to the controller and the electric drain valve; Send a control command to the electric vent valve through the controller; The control command is received by the electric drain valve, and the opening of the electric drain valve is adjusted to a set opening based on the control command.

2. The method according to claim 1, characterized in that When a power-off signal is detected, before providing electric energy to the controller and the electric vent valve through the energy storage circuit, the method further includes: A power-off signal is detected by a power-off identification circuit, and the power-off signal is transmitted to the controller.

3. The method according to claim 2, characterized in that The sending of a control command to the electric vent valve by the controller includes: Receiving a power-off signal transmitted by the power-off identification circuit through a controller; A control command is sent to the electric vent valve by the controller based on the power-off signal.

4. The method according to claim 1, characterized in that: The energy storage circuit is composed of a single-phase full-bridge rectifier circuit, a resistor, a diode, and a capacitor; the energy storage circuit is used to store electrical energy using the alternating current generated when the compressor is powered on, and release electrical energy when the compressor is powered off, so that the controller and the electric drain valve can work normally.

5. The method according to claim 1, characterized in that The energy storage circuit includes a control energy storage circuit and a power energy storage circuit; The control energy storage circuit includes a first capacitor, and the power energy storage circuit includes a second capacitor; the first capacitor is used to release electric energy when the compressor is powered off, and provide electric energy to the controller so that the controller can work normally; the second capacitor is used to release electric energy when the compressor is powered off, and provide electric energy to the electric drain valve so that the electric drain valve can work normally; The electric energy stored in the second capacitor must be sufficient to continuously provide electric energy to the electric drain valve for a target time, and the first time threshold ≤ the target time ≤ the second time threshold.

6. The method according to claim 5, characterized in that The storing of electric energy by the energy storage circuit comprises: Charging the first capacitor in the control energy storage circuit through the first single-phase full-bridge rectifier circuit; The second capacitor in the power energy storage circuit is charged through the second single-phase full-bridge rectifier circuit.

7. The method according to claim 5, characterized in that The method of providing electric energy to the controller and the electric vent valve through the energy storage circuit includes: Releasing electric energy through the first capacitor in the control energy storage circuit to provide electric energy for the controller; The electric energy is released through the second capacitor in the power energy storage circuit to provide electric energy for the electric drain valve.

8. A compressor power-off protection device, characterized in that: include: The electric energy storage module is used to store electric energy through an energy storage circuit when the compressor is powered on. The energy storage circuit is composed of a single-phase full-bridge rectifier circuit, a resistor, a diode, and a capacitor. The energy storage circuit is used to store electric energy using the alternating current generated when the compressor is powered on, and release the electric energy when the compressor is powered off, so that the controller and the electric drain valve can work normally. An electric energy module is provided, which is used to provide electric energy to the controller and the electric drain valve through the energy storage circuit when a power failure signal is detected; A sending module, used for sending a control command to the electric vent valve through a controller; The protection module is used to receive the control command through the electric drain valve and adjust the opening of the electric drain valve to a set opening based on the control command.

9. A compressor power failure protection system, characterized in that: The system includes an energy storage circuit, a controller, and an electric vent valve; The energy storage circuit is used to store electrical energy and provide electrical energy to the controller and the electric vent valve; The controller is used to send a control command to the electric vent valve; The electric drain valve is used to receive the control command and adjust the opening of the electric drain valve to a set opening based on the control command.

10. A compressor, characterized in that: It comprises the compressor power-off protection device as claimed in claim 8, or the compressor power-off protection system as claimed in claim 9.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

12. A computer program product, characterized in that The computer program product comprises a computer program or instructions, and when the computer program or instructions are executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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