Shutdown control system of compression device, heat pump device, equipment and drive system

Abstract

The present application provides a shutdown control system for a compression device, a heat pump device, equipment, and a drive system. The shutdown control system for the compression device includes a pressure switch device and a control device. The pressure switch device is configured to shut down when detecting that the system pressure is overpressure and output a shutdown signal; the control device is connected to the pressure switch device and is connected to the drive device of the compression device during use. The control device is configured to output a first drive signal to the drive device and stop outputting the first drive signal after receiving the shutdown signal. The first drive signal is used to instruct the drive device to drive the compression device to operate. The present application can improve the efficiency and success rate of shutting down the compression device and improve the safety factor of the air conditioning system and the heat pump system.

Description

Technical Field

[0001] This application relates to control technology, and particularly to a shutdown control system, a heat pump device, equipment, and a drive system for a compression device. Background Art

[0002] A compression device (including a compressor and a pressure vessel, and the pressure in the pressure vessel changes when the compressor operates) is an important component in the operation of an air conditioning system and a heat pump system. In a system containing a compression device, when the system pressure is high, if no measures are taken to shut down the compression device, the system pressure will continue to rise, thus causing danger.

[0003] The existing method for shutting down the compression device is to collect the switch signal of the compression device through the main control board, and then the main control board outputs a signal to the module board according to the switch signal, and the module board controls the shutdown of the compression device. This method for shutting down the compression device involves more components, has a slow response speed, and as long as any one component is damaged, the situation where the compression device cannot be shut down will occur, thus leading to serious consequences.

[0004] Therefore, how to improve the efficiency and success rate of shutting down the compression device and improve the safety factor of the air conditioning system and the heat pump system still needs to be solved. Summary of the Invention

[0005] This application provides a shutdown control system, a heat pump device, equipment, and a drive system for a compression device to improve the success rate of shutting down the compression device and improve the safety factor of the air conditioning system and the heat pump system.

[0006] On the one hand, this application provides a shutdown control system for a compression device, including:

[0007] A pressure switch device, which is used to shut down when detecting that the system pressure is overpressure and output a shutdown signal;

[0008] A control device, connected to the pressure switch device and connected to the drive device of the compression device during use. The control device is used to output a first drive signal to the drive device and stop outputting the first drive signal after receiving the shutdown signal. The first drive signal is used to instruct the drive device to drive the compression device to operate.

[0009] An embodiment of the present application provides a shutdown control system for a compression device, including a pressure switch device and a control device. The pressure switch device is configured to shut down when detecting overpressure of the system pressure and output a shutdown signal. The control device is signal-connected to the driving device and the pressure switch device, and is configured to output the first driving signal to the driving device to operate, and to stop outputting the first driving signal after receiving the shutdown signal. The first driving signal is used to drive the driving device to operate. Therefore, when the system is overpressured, the control device controls the driving device of the compression device to stop outputting the driving signal, thereby controlling the shutdown of the compression device. During overpressure protection, there is no need to perform software logic judgment, and the hardware is directly shut down through signal driving. The required components are few, the response is faster and safer, improving the efficiency and success rate of the shutdown of the compression device and enhancing the safety factor of the air-conditioning system and the heat pump system.

[0010] In one optional embodiment, it further includes:

[0011] A signal output control device, connected to the pressure switch device and the control device, and configured to control the control device to stop outputting the first driving signal according to the shutdown signal.

[0012] In one optional embodiment, the signal output control device includes a first chip and a second chip;

[0013] The first chip is connected to the pressure switch device, and the first chip is configured to output a reset signal to the second chip according to the shutdown signal;

[0014] The second chip is signal-connected to the control device, and the second chip is configured to control the control device to stop outputting the first driving signal according to the reset signal.

[0015] In one optional embodiment, the first chip is specifically configured to:

[0016] When obtaining the shutdown signal, obtain the output signal of the control device;

[0017] When the output signal of the control device is the first driving signal, output the reset signal to the second chip.

[0018] In one optional embodiment, it further includes:

[0019] A signal transmission circuit, one end of which is connected to the output end of the control device for obtaining the output signal, and the other end is connected to the input end of the first chip.

[0020] The shutdown control system of the compression device provided in this embodiment further includes a signal output control device, which includes a first chip and a second chip. The first chip is configured to output a reset signal to the second chip according to the shutdown signal, and the second chip is configured to control the control device to stop outputting the first drive signal according to the reset signal. In this way, if the control device does not stop outputting the first drive signal after receiving the shutdown signal, the signal output control device can further control the control device to stop outputting the first drive signal.

[0021] In one optional embodiment, the enable pin of the control device is further connected to a first power supply, and the pressure switch device includes:

[0022] An isolator, with the first end connected to the control device and the first power supply, and the second end grounded;

[0023] A pressure switch, with one end connected to the third end of the isolator and the other end grounded, configured to shut down when the system pressure is overpressure;

[0024] When the pressure switch is closed, the isolator and the enable pin of the control device are grounded;

[0025] When the pressure switch is turned off, the enable pin of the control device receives the voltage signal output by the first power supply as the shutdown signal.

[0026] In one optional embodiment, the fourth end of the isolator is further connected to a second power supply, as well as the first pin and the second pin of the first chip;

[0027] When the pressure switch is closed, there is no signal input to the first pin and the second pin of the first chip;

[0028] When the pressure switch is turned off, the pressure signal received by the first chip through the first pin and the second pin is the shutdown signal.

[0029] In one optional embodiment, the isolator is an opto-isolator.

[0030] In one optional embodiment, the first chip includes a reset feedback pin, and the second chip is configured to send a reset feedback signal to the reset feedback pin after receiving the reset signal, and the reset feedback signal is used to indicate that the second chip has successfully received the reset signal.

[0031] This embodiment exemplarily describes a pressure switch device. The pressure switch device includes an isolator and a pressure switch. When system overvoltage is detected, the pressure switch first shuts off, which in turn causes the isolator to become non-conductive. When the isolator is non-conductive, the first power supply connected to the isolator outputs a pressure signal to the enable pin of the control device, causing the control device to receive the shutdown signal and thus stop outputting the first drive signal.

[0032] In one optional embodiment, the control device includes N bridge arm pulse width modulation (PWM) circuits, and the conduction time of each bridge arm PWM circuit in the N bridge arm PWM circuits is different; N is an integer greater than 1.

[0033] In one optional embodiment, each bridge arm PWM circuit includes a triode.

[0034] In one optional embodiment, it further includes a first protection device and a second protection device;

[0035] One end of both the first protection device and the second protection device is connected to the drive device, and the other end of both is connected to the control device. Both the first protection device and the second protection device are used to buffer the output of the control device.

[0036] In one optional embodiment, the first protection device includes:

[0037] A first resistor, one end of which is connected to a bridge arm PWM circuit and the other end is connected to the drive device;

[0038] A first capacitor, one end of which is connected to the other end of the first resistor and the other end is grounded.

[0039] In one optional embodiment, the second protection device includes:

[0040] A second resistor, one end of which is connected to a bridge arm PWM circuit and the other end is connected to the drive device;

[0041] A third resistor, one end of which is connected to one end of the second resistor and the other end is grounded;

[0042] A second capacitor, one end of which is connected to the other end of the second resistor and the other end is grounded.

[0043] In one optional embodiment, it further includes:

[0044] A drive device, which is connected to a compression device during use and is used to output a second drive signal to the compression device after receiving the first drive signal. The second drive signal is used to drive the compression device to operate.

[0045] On the other hand, the present application provides a heat pump device, including the shutdown control system of the compression device provided in the first aspect, and further including:

[0046] A compression device;

[0047] A heat exchange device for heating liquid water.

[0048] On the other hand, the present application provides an electrical equipment, including the heat pump device provided in the second aspect.

[0049] On the other hand, the present application provides a drive system, including the shutdown control system of the compression device provided in the first aspect, and further including:

[0050] A drive device, which is connected to the compression device during use and is used to output a second drive signal to the compression device after receiving the first drive signal, and the second drive signal is used to drive the compression device to operate.

[0051] In summary, for the shutdown control system of the compression device provided in the above embodiments of the present application, when the system is overvoltage, the control device controls the drive device of the compression device to stop outputting the drive signal, so as to control the shutdown of the compression device. During overvoltage protection, there is no need to make software logic judgments, and the hardware is directly driven to shut down through signal drive. The required components are few, the response is faster and safer, which improves the efficiency and success rate of the shutdown of the compression device, and improves the safety factor of the air conditioning system and the heat pump system. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The accompanying drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present disclosure and used together with the specification to explain the principles of the present disclosure.

[0053] Figure 1 A schematic structural diagram of the shutdown control system of the compression device provided in an embodiment of the present application;

[0054] Figure 2 A schematic structural diagram of the shutdown control system of the compression device provided in another embodiment of the present application;

[0055] Figure 3 A schematic structural diagram of the shutdown control system of the compression device provided in yet another embodiment of the present application;

[0056] Figure 4 A schematic structural diagram of the shutdown control system of the compression device provided in another embodiment of the present application;

[0057] Figure 5 A schematic structural diagram of the shutdown control system of the compression device provided in yet another embodiment of the present application;

[0058] Figure 6 Schematic diagram of the shutdown control system of the compression device provided for another embodiment of the present application;

[0059] Figure 7 Schematic diagram of the heat pump device provided for an embodiment of the present application;

[0060] Figure 8 Schematic diagram of the electrical equipment provided for an embodiment of the present application;

[0061] Figure 9 Schematic diagram of the drive system provided for an embodiment of the present application.

[0062] Description of reference numerals:

[0063] Shutdown control system 10 of the compression device

[0064] Pressure switch device 100

[0065] Isolator 110

[0066] Pressure switch 120

[0067] Drive device 200

[0068] Control device 300

[0069] Bridge arm PWM circuit 310

[0070] Signal output control device 400

[0071] First chip 410

[0072] Second chip 420

[0073] Signal transmission circuit 500

[0074] First protection device 600

[0075] Second protection device 700

[0076] Compression device 20

[0077] First power supply 21

[0078] Second power supply 22

[0079] Heat pump device 30

[0080] Heat exchange device 31

[0081] Electrical equipment 40

[0082] Drive system 50

[0083] Through the above-mentioned accompanying drawings, specific embodiments of the present disclosure have been shown and will be described in more detail hereinafter. These drawings and the written description are not intended to limit the scope of the concept of the present disclosure in any way, but to illustrate the concept of the present disclosure to those skilled in the art by reference to specific embodiments. Detailed Description of Specific Embodiments

[0084] Exemplary embodiments will be described in detail herein, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0085] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0086] A compression device (including a compressor and a pressure vessel, and the pressure in the pressure vessel changes when the compressor operates) is an important component for the operation of an air conditioning system and a heat pump system. In a system containing a compression device, when the system pressure is relatively high, if no measures are taken to shut off the compression device, the system pressure will continue to rise, thereby causing danger.

[0087] The existing method for shutting off the compression device is to collect the on-off signal of the compression device by a main control board, and then the main control board outputs a signal to a module board according to the on-off signal, and the module board controls the shutting off of the compression device. This method for shutting off the compression device involves a relatively large number of components, has a slow response speed, and as long as any one component is damaged, the compression device cannot be shut off, which may lead to serious consequences. Therefore, how to improve the efficiency and success rate of shutting off the compression device and improve the safety factor of the air conditioning system and the heat pump system still needs to be solved.

[0088] Based on this, the present application provides a shutdown control system for a compression device, a heat pump device, equipment, and a drive system. Among them, the shutdown control system for the compression device includes a pressure switch device, a drive device, and a control device. The pressure switch device is used to shut down when the system pressure is overpressure and output a shutdown signal. The drive device is connected to the compression device (the compression device is the compressor), and the drive device outputs a second drive signal to the compression device after receiving a first drive signal, and the second drive signal is used to drive the compression device to operate. The control device (such as a logic chip) is connected to the drive device and the pressure switch device, and is used to output the first drive signal to the drive device and stop outputting the first drive signal after receiving the shutdown signal. In this way, when the system is overpressure, the control device of the drive device of the compressor stops outputting the drive signal, and further the drive device no longer drives the compressor to operate, achieving the purpose of shutting down the compression device. The components involved in the shutdown control system for the compression device provided by the present application are very few. When shutting down the compression device, it is mechanical drive rather than program drive, thereby improving the efficiency and success rate of shutting down the compression device and enhancing the safety factor of the air-conditioning system and the heat pump system.

[0089] Please refer to Figure 1 , an embodiment of the present application provides a shutdown control system 10 for a compression device, which is used to control the shutdown of the compression device 20 (i.e., the compressor), especially to control the shutdown of the compression device 20 when the system is overpressure, that is, to control the compression device 20 to shut down when the system is overpressure. The system pressure can be a partial system pressure. For example, the system pressure refers to the pressure of some components connected to the compressor in the air conditioner. Controlling the compression device 20 to shut down when the system is overpressure can prevent the dangerous situation of continuous pressure increase caused by the compression device 20.

[0090] The shutdown control system 10 for the compression device includes a pressure switch device 100 and a control device 300 connected to the drive device 200 of the compression device 20. The drive device 200 is connected to the compression device 20, and the drive device 200 can be understood as a compressor drive module. The drive device 200 is used to output a second drive signal to the compression device 20 after receiving a first drive signal, and the second drive signal is used to drive the compression device 20 to operate. Without the first drive signal, the drive device 200 will not output the second drive signal and will not drive the compression device 20 to operate.

[0091] The pressure switch device 100 is used to turn off when the system is overpressure and output a turn-off signal. The pressure switch device 100 is, for example, the switch part in a device for detecting whether the system is overpressure. When the system is not overpressure, that is, when the system is operating normally, the pressure switch device 100 is in a normally closed state. When the system overpressure is detected, the pressure switch device 100 turns off under the overpressure impact. In an alternative embodiment, when the system is not overpressure, that is, when the system is operating normally, the pressure switch device 100 is in a normally open state. When the system overpressure is detected, the pressure switch device 100 closes under the overpressure impact. In short, the pressure switch device 100 needs to present a state opposite to that when the system is operating normally when the system is overpressure, so as to output a turn-off signal to enable other devices to obtain the information that the system is overpressure.

[0092] The control device 300 is connected to the drive device 200 and the pressure switch device 100. The control device 300 is used to output the first drive signal to the drive device 200 and stop outputting the first drive signal after receiving the turn-off signal. As described above, the first drive signal is used to instruct the drive device 200 to drive the compression device 20 to work. When the control device 300 stops outputting the first drive signal, the drive device 200 stops outputting the second drive signal to the compression device 20, so as to achieve the purpose of turning off the compression device 20.

[0093] The control device 300 is, for example, a logic chip, and mechanically triggers to stop outputting the first drive signal after receiving the turn-off signal.

[0094] In summary, this embodiment provides a turn-off control system 10 for a compression device, including a pressure switch device 100 and a control device 300. The pressure switch device 100 is used to turn off when the system pressure is overpressure and output a turn-off signal. The control device 300 is signal-connected to the drive device 200 and the pressure switch device 100, and is used to output the first drive signal to the drive device 200 to work and stop outputting the first drive signal after receiving the turn-off signal. The first drive signal is used to drive the drive device to work. Therefore, when the system is overpressure, the control device 300 controls the drive device 200 of the compression device 20 to stop outputting the drive signal, so as to control the compression device 20 to turn off. During overpressure protection, there is no need to make software logic judgments, and the hardware is directly turned off through signal drive. The required components are few, the response is faster and safer, which improves the efficiency and success rate of turning off the compression device 20 and improves the safety factor of the air-conditioning system and the heat pump system.

[0095] In addition, when the system resumes normal operation, the control device 300 first outputs the first driving signal to the driving device 200, and then the driving device 200 outputs a second driving signal to the compression device 20 under the action of the first driving signal. In this way, when the system suddenly resumes normal operation, the process of the compression device 20 resuming normal operation has a time buffer, which can prevent the compression device 20 from being suddenly damaged due to the sudden resume of normal operation of the system.

[0096] Please refer to Figure 2 and Figure 3 , the shutdown control system 10 of the compression device provided by an embodiment of the present application further includes a signal output control device 400, and the signal output control device 400 is connected to the pressure switch device 100 and the control device 300. The signal output control device 400 is configured to control the control device 300 to stop outputting the first driving signal according to the shutdown signal.

[0097] The signal output control device 400 includes, for example, a microcontroller unit (MCU) that drives the control device 300. After receiving the shutdown signal, the microcontroller stops outputting a driving signal to the control device 300, thereby controlling the control device 300 to stop outputting the first driving signal.

[0098] In an optional embodiment, the signal output control device 400 includes a first chip 410 and a second chip 420.

[0099] The first chip 410 is connected to the pressure switch device 100. The first chip 410 is configured to output a reset signal to the second chip 420 according to the shutdown signal. The second chip 420 is signal-connected to the control device 300. The second chip 420 is configured to control the control device 300 to stop outputting the first driving signal according to the reset signal. The second chip 420 is further configured to output a driving signal to drive the control device 300 to work.

[0100] The purpose of the first chip 410 outputting the reset signal to the second chip 420 is to prevent the situation that the control device 300 does not stop outputting the first driving signal after receiving the shutdown signal, and to control the control device 300 to stop outputting the first driving signal through the second chip 420.

[0101] Specifically, when the first chip 410 is specifically used to obtain the turn-off signal, it also obtains the output signal of the control device 300. When the output signal of the control device 300 is the first drive signal, the first chip 410 outputs the reset signal to the second chip 420. After receiving the reset signal, the second chip 420 stops outputting the drive signal to the control device 300. More specifically, when it is determined that the output signal of the control device 300 is the first drive signal, the first chip 410 outputs a signal indicating a control device failure to the second chip 420 through a pin.

[0102] The second chip 420 is provided with a pin for receiving the reset signal. The first chip 410 sends the reset signal to the pin (RST) on the second chip 420 for receiving the reset signal through the pin for outputting the reset signal.

[0103] In an alternative embodiment, the second chip 420 is further provided with a reset feedback pin, and the first chip 410 is further provided with a pin for receiving a feedback signal. The second chip 420 is configured to send a reset feedback signal to the first chip 410 through the reset feedback pin after receiving the reset signal. The reset feedback signal is used to indicate that the second chip 420 has successfully received the reset signal. Therefore, after receiving the reset feedback signal, the second chip 420 learns that the first chip 410 stops outputting the drive signal.

[0104] Please refer to Figure 3 , in an alternative embodiment, the turn-off control system 10 of the compression device further includes a signal transmission circuit 500. One end of the signal transmission circuit 500 is connected to the output end of the control device 300 for obtaining the output signal of the control device 300. The other end of the signal transmission circuit 500 is connected to the input end of the first chip 410. The signal transmission circuit 500 is configured to transmit the output signal of the control device 300 to the second chip 420.

[0105] As Figure 3 shown, the signal transmission circuit 500 includes a resistor R1 and a capacitor C1. One end of the resistor R1 is connected to the output end of the control device 300, and the other end is connected to the input end of the first chip 410 and one end of the capacitor C1. One end of the capacitor C1 is also connected to the input end of the first chip 410, and the other end of the capacitor C1 is grounded. In addition to the function of transmitting signals, the signal transmission circuit 500 can also stabilize the output signal of the control device 300, that is, make the output signal of the control device 300 more stable.

[0106] In summary, the shutoff control system 10 of the compression device provided in this embodiment also includes a signal output control device 400, and the signal output control device 400 includes a first chip 410 and a second chip 420. The first chip 410 is used to output a reset signal to the second chip 420 according to the shutoff signal, and the second chip 420 is used to control the control device 300 to stop outputting the first drive signal according to the reset signal. In this way, if the control device 300 does not stop outputting the first drive signal after receiving the shutoff signal, the control device 300 can be further controlled to stop outputting the first drive signal through the signal output control device 400, thereby improving the shutoff success rate of the compression device 20.

[0107] See also Figure 4 , one embodiment of the present application provides an example of a pressure switch device 100 .

[0108] The pressure switch device 100 includes an isolator 110 and a pressure switch 120. The enable pin of the control device 300 is also connected to the first power supply 21, which is, for example, a power supply provided in the compression device 20, and the voltage output by the first power supply 21 is, for example, 5V.

[0109] The first end of the isolator 110 is connected to the control device 300 and the first power source 21, and the second end is grounded. One end of the pressure switch 120 is connected to the third end of the isolator 110, and the other end is grounded, and is used to shut down when the system pressure is detected to be overpressure. The isolator 110 is, for example, an optocoupler isolator.

[0110] Specifically, when the pressure switch 120 is closed, the third end of the isolator 110 is grounded, the isolator 110 is turned on, the enable pins of the isolator 110 and the control device 300 are grounded, and there is no pressure signal at the enable pin of the control device 300. When the pressure switch 120 is turned off, the isolator 110 is also in a non-conducting state, so that the voltage output by the first power supply 21 received by the enable pin of the control device 300 is the shutdown signal.

[0111] In an optional embodiment, the fourth end of the isolator 110 is also connected to the second power source 22, and to the first pin and the second pin of the first chip 410. Figure 4 ,

[0112] When the pressure switch 120 is closed, there is no signal input to the first pin and the second pin of the first chip 410, and at this time, the first chip 410 does not receive the shutdown signal. When the pressure switch 120 is turned off, the voltage signal output by the first power supply 22 cannot pass through the isolator 110, but is transmitted to the first pin and the second pin of the first chip 410 through a circuit. The pressure signal received by the first chip 410 through the first pin and the second pin is the shutdown signal.

[0113] In summary, this embodiment exemplarily describes a pressure switch device 100. The pressure switch device 100 includes an isolator 110 and a pressure switch 120. When detecting that the system is overvoltage, the pressure switch 120 is first turned off, which in turn causes the isolator 110 to be unable to conduct. When the isolator 110 is unable to conduct, the first power supply 21 connected to the isolator 110 outputs a pressure signal to the enable pin of the control device 300, enabling the control device 300 to receive the shutdown signal, thereby stopping outputting the first drive signal.

[0114] Please refer to Figure 4 , in an alternative embodiment, a resistor R2 and a resistor R3 are further provided between the first power supply 21 and the enable pin of the control device 300. One end of the resistor R2 is connected to the first power supply 21, and the other end is connected to one end of the resistor R3. The other end of the resistor R3 is connected to the enable pin of the control device 300. The resistor R2 and the resistor R3 can make the voltage output by the first power supply 21 more stable.

[0115] A resistor R4 is further provided between the pressure switch 120 and the isolator 110. One end of the resistor R4 is connected to the third end of the isolator 110, the other end of the resistor R4 is connected to one end of the pressure switch 120, and the other end of the pressure switch 120 is grounded. The resistor R4 can make the voltage output from the isolator 110 more stable.

[0116] A resistor can also be provided between the first power supply 22 and the isolator 110. One end of the resistor is connected to the first power supply 22, and the other end is connected to the isolator 110.

[0117] A resistor R5 is provided between the first power supply 22 and the first pin of the first chip 410, that is, one end of the resistor R5 is connected to the first power supply 22, and the other end is connected to the first pin. A resistor R6 is provided between the first power supply 22 and the second pin of the first chip 410. One end of the resistor R6 is connected to the first power supply 22, and the other end is connected to the second pin. The functions of the resistor R5 and the resistor R6 are to stabilize the voltage signal output by the first power supply 22.

[0118] Please refer to Figure 5, in the turn-off control system 10 of the compression device provided by an embodiment of the present application, the control device 300 includes N bridge arm pulse width modulation (PWM) circuits 310. The number of N is determined by the requirements of the driving device 200. Figure 5 As shown, the control device 300 includes two bridge arm PWM circuits 310, namely the upper bridge arm 3-channel PWM circuit 310 and the lower bridge arm 3-channel PWM circuit 310. Each bridge arm PWM circuit 310 includes a triode, and the control device 300 includes a triode array.

[0119] The N bridge arm PWM circuits 310 are all driven to conduct by the driving signals output by the second chip 420. In order to prevent the bridge arm PWM circuits 310 from affecting each other, the conduction time of each bridge arm PWM circuit 310 in the N bridge arm PWM circuits 310 can be different. The driving signals output by the second chip 420 are pulse signals, and the first driving signals output by the control device 300 are also pulse signals. Optionally, the control device 300 can be an 8-channel buffer.

[0120] In an optional embodiment, the turn-off control system 10 of the compression device further includes a first protection device 600 and a second protection device 700. One ends of the first protection device 600 and the second protection device 700 are both connected to the driving device 200, and the other ends are both connected to the control device 300. The first protection device 600 and the second protection device 700 are both used to buffer the output of the control device 300.

[0121] Optionally, the first protection device 600 includes a first resistor R7 and a first capacitor C2. One end of the first resistor R7 is connected to a bridge arm PWM circuit 310 (such as Figure 5 the upper bridge arm 3-channel PWM circuit 310 shown), and the other end is connected to the driving device 200. One end of the first capacitor C2 is connected to the other end of the first resistor R7, and the other end is grounded. The first resistor R7 and the first capacitor C2 can perform stabilization processing and buffering processing on the first driving signals output by the upper bridge arm 3-channel PWM circuit 310.

[0122] Optionally, the second protection device 700 includes a second resistor R8, a third resistor R9 and a second capacitor C3. One end of the second resistor R8 is connected to a bridge arm PWM circuit 310 (such as Figure 5 the lower bridge arm 3-channel PWM circuit 310 shown), and the other end is connected to the driving device 200. One end of the third resistor R9 is connected to one end of the second resistor R8, and the other end is grounded. One end of the second capacitor C3 is connected to the other end of the second resistor R8, and the other end is grounded.

[0123] The second resistor R8, the third resistor R9, and the second capacitor C3 can perform stabilization processing and buffering processing on the first driving signal output by the lower-bridge arm 3-channel PWM circuit 310.

[0124] The resistance values of the first resistor R7, the second resistor R8, and the third resistor R9 can all be selected according to actual needs, and are not limited in this embodiment.

[0125] The specifications of the first capacitor C2 and the second capacitor C3 can be selected according to actual needs, and are not limited in this embodiment.

[0126] In summary, when the system is overvoltage, the shutdown control system 10 of the compression device provided in the above embodiments of the present application controls the driving device 200 of the compression device 20 to stop outputting the driving signal, so as to control the compression device 20 to shut down. During overvoltage protection, there is no need to make software logic judgments, and the hardware is directly driven to shut down through signal driving. The required devices are few, the response is faster and safer, the shutdown efficiency and success rate of the compression device 20 are improved, and the safety factor of the air-conditioning system and the heat pump system is improved.

[0127] It should also be noted that the type of the power supply in the shutdown control system 10 provided in the above embodiments of the present application is not limited, and it can also be a unidirectional power supply.

[0128] Please refer to Figure 6 , the shutdown control system 10 of the compression device provided in an embodiment of the present application further includes the driving device 200. When in use, the driving device 200 is connected to the compression device 20, and is used to output a second driving signal to the compression device after receiving the first driving signal, and the second driving signal is used to drive the compression device to work. The specifications and models of the driving device 200 can be selected according to actual needs, and are not limited in this embodiment. The driving device 200 determines the number of PWM circuits 310 in the control device 300.

[0129] Please refer to Figure 7 , an embodiment of the present application further provides a heat pump device 30, which includes the shutdown protection system 10 provided in any of the above embodiments, and further includes a compression device 20 and a heat exchange device 31, and the heat exchange device 31 is used to heat the liquid water. The heat pump device 30 is, for example, a heat pump pool machine, and the heat pump pool machine is generally installed beside the pool and is used to heat the water in the pool. The compression device 20 can be arranged inside the heating device 31 or outside the heating device 31.

[0130] Please refer to Figure 8, an embodiment of the present application further provides an electrical device 40. The electrical device 40 includes the heat pump device 30 provided in any of the above embodiments, and may further include other devices, which are not limited in this embodiment.

[0131] Please refer to Figure 9 , an embodiment of the present application further provides a drive system 50. The drive system includes the shutdown control system 10 of the compression device provided in any of the above embodiments, and further includes a drive device 200. When in use, the drive device 200 is connected to the compression device 20, and is configured to output a second drive signal to the compression device 20 after receiving the first drive signal. The second drive signal is used to drive the compression device to operate. The description of the drive device 200 can refer to the description of the drive device 200 in the shutdown control system 10 of the compression device provided in the above embodiments, and will not be elaborated herein.

[0132] It should be noted that in this article, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0133] The serial numbers of the embodiments of the present application above are only for description and do not represent the superiority or inferiority of the embodiments.

[0134] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the description of the present application specification and the drawings, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A shutdown control system for a compression device, characterized in that, Including: A pressure switch device, which shuts off when detecting overpressure of the system pressure and outputs a shut-off signal; A control device, connected to the pressure switch device and connected to the driving device of the compression device during use. The control device is used to output a first driving signal to the driving device and stop outputting the first driving signal after receiving the shut-off signal. The first driving signal is used to instruct the driving device to drive the compression device to work; The shut-off control system further includes: a signal output control device, and the signal output control device includes a first chip and a second chip; The first chip is connected to the pressure switch device. When the first chip obtains the shut-off signal, it obtains the output signal of the control device; when the output signal of the control device is the first driving signal, it outputs a reset signal to the second chip; The second chip is signal-connected to the control device. After receiving the reset signal, the second chip stops outputting a driving signal to the control device, so that the control device stops outputting the first driving signal.

2. The system according to claim 1, wherein It further includes: A signal transmission circuit, one end is connected to the output end of the control device for obtaining the output signal, and the other end is connected to the input end of the first chip.

3. The turn-off control system of the compression device according to claim 1, characterized in that, The enable pin of the control device is also connected to a first power supply. The pressure switch device includes: An isolator, the first end is connected to the control device and the first power supply, and the second end is grounded; A pressure switch, one end is connected to the third end of the isolator, and the other end is grounded, and is used to shut off when detecting overpressure of the system pressure; When the pressure switch is closed, the isolator and the enable pin of the control device are grounded; When the pressure switch is shut off, the enable pin of the control device receives a voltage signal output by the first power supply as the shut-off signal.

4. The system according to claim 3, characterized in that, The fourth end of the isolator is also connected to a second power supply, and the first pin and the second pin of the first chip; When the pressure switch is closed, there is no signal input to the first pin and the second pin of the first chip; When the pressure switch is shut off, the pressure signal received by the first chip through the first pin and the second pin is the shut-off signal.

5. The system according to claim 3, characterized in that, The isolator is an opto-isolator.

6. The system according to claim 1, wherein The first chip includes a reset feedback pin. The second chip is used to send a reset feedback signal to the reset feedback pin after receiving the reset signal. The reset feedback signal is used to identify that the second chip has successfully received the reset signal.

7. The system according to claim 1, wherein The control device includes N bridge-arm pulse width modulation PWM circuits, and the conduction time of each bridge-arm PWM circuit in the N bridge-arm PWM circuits is different; N is an integer greater than 1.

8. The system according to claim 7, wherein Each bridge-arm PWM circuit includes a triode.

9. The system according to claim 8, characterized in that, It further includes a first protection device and a second protection device; One ends of the first protection device and the second protection device are both connected to the driving device, and the other ends are both connected to the control device. The first protection device and the second protection device are both used to buffer the output of the control device.

10. The system according to claim 9, characterized in that, The first protection device includes: A first resistor, one end is connected to a bridge-arm PWM circuit, and the other end is connected to the driving device; The first capacitor has one end connected to the other end of the first resistor and the other end grounded.

11. The system according to claim 9, wherein The second protection device includes: A second resistor having one end connected to a bridge arm PWM circuit and the other end connected to the driving device; A third resistor having one end connected to one end of the second resistor and the other end grounded; A second capacitor having one end connected to the other end of the second resistor and the other end grounded.

12. The system according to any one of claims 1-11, characterized in that, It further includes: A driving device, which is connected to the compression device during use and is configured to output a second driving signal to the compression device after receiving the first driving signal, and the second driving signal is used to drive the compression device to operate.

13. A heat pump device, characterized in that, It includes a turn-off control system of the compression device provided in any one of claims 1-12, and further includes: A compression device; A heat exchange device, which is used for heating liquid water.

14. An electrical device, including a heat pump device provided in claim 13.

15. A drive system, characterized in that, It includes a turn-off control system of the compression device provided in any one of claims 1-14, and further includes: A driving device, which is connected to the compression device during use and is configured to output a second driving signal to the compression device after receiving the first driving signal, and the second driving signal is used to drive the compression device to operate.

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