Shutdown protection, drive, overvoltage shutdown system, heat pump device and electrical equipment

Abstract

The present application provides a turn-off protection, drive and overvoltage turn-off system, a heat pump device and an electrical equipment. The turn-off protection system includes a first control device and a second control device. When in use, the first control device is signal-connected to a pressure switch device, and is configured to output a first drive signal, and further configured to stop outputting the first drive signal according to a pressure switch action signal. The pressure switch device is configured to turn off when detecting that the system pressure is overpressure, and output a pressure switch action signal; the first drive signal is used to instruct the drive device to drive the compression device to operate. The second control device is configured to output a fault protection signal to the drive device when obtaining the pressure switch action signal and the first drive signal from the first control device. The fault protection signal is used to control the drive device to stop outputting a second drive signal to the compression device. The present application can improve the efficiency and success rate of turning off the compression device, and improve the safety factor of the air-conditioning system and the heat pump system.

Description

Technical Field

[0001] The present application relates to control technology, and in particular, to a turn-off protection, driving, and overvoltage turn-off system, a heat pump device, and an electrical appliance 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 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 high, if no measures are taken to turn off the compression device, the system pressure will continue to rise, thus causing danger.

[0003] The existing method for turning off the compression device is to collect the switch signal of the compression device by 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 turn-off of the compression device. This method for turning off the compression device involves more components, has a slow response speed, and as long as any one component is damaged, the compression device cannot be turned off, which will lead to serious consequences.

[0004] Therefore, how to improve the efficiency and success rate of turning off 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] The present application provides a turn-off protection, driving, and overvoltage turn-off system, a heat pump device, and an electrical appliance device to improve the success rate of turning off the compression device and improve the safety factor of the air conditioning system and the heat pump system.

[0006] On the one hand, the present application provides a turn-off protection system, including:

[0007] A first control device, which is signal-connected to a pressure switch device during use, is used to output a first driving signal, and is also used to stop outputting the first driving signal according to the pressure switch action signal. The pressure switch device is used to turn off when detecting that the system pressure is overpressure and output a pressure switch action signal; the first driving signal is used to instruct the driving device of the compression device to drive the compression device to operate;

[0008] A second control device, which is connected to the first control device and is also connected to the driving device during use. The second control device is used to output a fault protection signal to the driving device when obtaining the pressure switch action signal and the first driving signal from the first control device. The fault protection signal is used to control the driving device to stop outputting a second driving signal to the compression device.

[0009] In one optional embodiment, it further includes:

[0010] A third control device, connected to the first control device and the pressure switch device, is configured to output a third driving signal and stop outputting the third driving signal according to the pressure switch actuation signal. The third driving signal is used to drive the first control device to output the first driving signal.

[0011] In one optional embodiment, it further includes:

[0012] A signal output circuit, with one end connected to the second control device and the other end connected to the driving device.

[0013] In one optional embodiment, the signal output circuit includes:

[0014] A first triode, with its base connected to the output of the second control device and its emitter grounded;

[0015] A second triode, with its emitter connected to a first power supply, its base connected to the collector of the first triode, and its collector connected to the first pin of the driving device;

[0016] The fault protection signal is used to turn on the first triode and the second triode, so that after the driving device receives the voltage signal output by the first power supply through the first pin, it stops outputting the second driving signal.

[0017] In one optional embodiment, the signal output circuit further includes:

[0018] A diode, with its positive pole connected to the collector of the second triode and its negative pole connected to the first pin.

[0019] In one optional embodiment, the driving device further includes a second pin, and the second pin is connected to the first feedback pin of the second control device;

[0020] When the driving device stops outputting the second driving signal, it sends a pulse signal to the first feedback pin through the second pin.

[0021] In one optional embodiment, it further includes the pressure switch device, and the pressure switch device includes:

[0022] A pressure detection switch, with one end connected to the enable pin of the first control device, also respectively connected to the pins of the second control device and the third control device, also connected to a second power supply, and the other end of the pressure detection switch grounded; the pressure detection switch is configured to turn off when detecting overpressure of the system pressure;

[0023] When the pressure detection switch is closed, the enable pin of the first control device is grounded;

[0024] When the pressure detection switch is turned off, the voltage signal output by the second power supply received by the enable pin of the first control device is the pressure switch action signal.

[0025] In one optional embodiment, the second control device is further connected to the third control device;

[0026] When the second control device is used to obtain the pressure switch action signal and the first drive signal from the first control device, it sends a reset signal to the third control device, and the reset signal is used to enable the third control device to control the stop of the output of the third drive signal.

[0027] In one optional embodiment, the first 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.

[0028] In one optional embodiment, each bridge arm PWM circuit includes a triode.

[0029] In one optional embodiment, the first control device includes an 8-channel buffer.

[0030] In one optional embodiment, it further includes a first protection device and a second protection device;

[0031] One end of the first protection device and the second protection device are both connected to the drive device, and the other end is both connected to the first control device, for buffering the output of the control device.

[0032] In one optional embodiment, the first protection device includes:

[0033] A first resistor, one end connected to a bridge arm PWM circuit, and the other end connected to the drive device;

[0034] A first capacitor, one end connected to the other end of the first resistor, and the other end grounded.

[0035] In one optional embodiment, the second protection device includes:

[0036] A second resistor, one end connected to a bridge arm PWM circuit, and the other end connected to the drive device;

[0037] A third resistor, one end connected to one end of the second resistor, and the other end grounded;

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

[0039] In one optional embodiment, it further includes:

[0040] A driving device, which is connected to a compression device during use, 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.

[0041] On the other hand, the present application provides a heat pump device, which includes the shut-off protection system provided in the first aspect, and further includes:

[0042] A compression device;

[0043] A heat exchange device, which is configured to heat-treat liquid water.

[0044] On the other hand, the present application provides an electrical equipment, which includes the heat pump device provided in the second aspect.

[0045] On the other hand, the present application provides a driving system, which includes the shut-off protection system described in the first aspect, and further includes:

[0046] A driving device, which is connected to a compression device during use, is configured to output a second driving signal to the compression device after receiving a first driving signal output by a first control device, so as to drive the compression device to operate.

[0047] On the other hand, the present application provides an overpressure detection and shut-off system, which includes the shut-off protection system described in the first aspect, and further includes:

[0048] A pressure switch device, which is configured to shut off when detecting system overpressure and output a pressure switch action signal.

[0049] This embodiment provides a shut-off protection system, which includes a first control device and a second control device. The first control device is signal-connected to the pressure switch device, and is configured to output a first driving signal, and is further configured to stop outputting the first driving signal according to the pressure switch action signal. The pressure switch device is configured to shut off when detecting system pressure overpressure and output a pressure switch action signal. The second control device is connected to the first control device and is also connected to the driving device of the compression device during use. The second control device is configured to output a fault protection signal to the driving device when obtaining the pressure switch action signal and the first driving signal from the first control device, and the fault protection signal is used to control the driving device to stop outputting a second driving signal to the compression device.

[0050] Therefore, when the system is overvoltage, the control device controls the drive device of the compression device to stop outputting drive signals, thereby controlling the compression device to shut down. The second control device is further configured to control the drive device to stop outputting drive signals when the system is overvoltage. The first control device and the second control device not only provide dual shutdown protection, improve the efficiency and success rate of the shutdown of the compression device, but also improve the safety factor of the air-conditioning system and the heat pump system.

[0051] In addition, during overvoltage protection, there is no need to perform software logic judgment. Instead, the hardware is directly driven to shut down through signal driving. 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 the safety factor of the air-conditioning system and the heat pump system. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The drawings herein are incorporated into the specification and form a part of the 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 Schematic diagram of the shutdown protection system provided by an embodiment of the present application;

[0054] Figure 2 Schematic diagram of the shutdown protection system provided by another embodiment of the present application;

[0055] Figure 3 Schematic diagram of a partial structure in the shutdown protection system provided by another embodiment of the present application;

[0056] Figure 4 Schematic diagram of the shutdown protection system provided by another embodiment of the present application;

[0057] Figure 5 Schematic diagram of the shutdown protection system provided by another embodiment of the present application;

[0058] Figure 6 Schematic diagram of the shutdown protection system provided by another embodiment of the present application;

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

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

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

[0062] Figure 10 Schematic diagram of the overvoltage shutdown system provided by an embodiment of the present application.

[0063] Description of the reference numerals:

[0064] Shutdown protection system 10

[0065] Pressure switch device 100

[0066] Pressure detection switch 110

[0067] First control device 200

[0068] PWM circuit 210

[0069] Second control device 300

[0070] Drive device 400

[0071] Third control device 500

[0072] Signal output circuit 600

[0073] First protection device 700

[0074] Second protection device 800

[0075] Compression device 20

[0076] First power supply 21

[0077] Second power supply 22

[0078] Heat pump device 30

[0079] Heat exchange device 31

[0080] Electrical equipment 40

[0081] Drive system 50

[0082] Overpressure shutdown system 60

[0083] Through the above-mentioned drawings, specific embodiments of the present disclosure have been shown, and there will be more detailed descriptions hereinafter. These drawings and textual descriptions 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 referring to specific embodiments. Detailed description of the specific embodiments

[0084] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numerals 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 only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying 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, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0086] The 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 high, if no measures are taken to shut off the compression device, the system pressure will continue to rise, thus causing danger.

[0087] The existing method for shutting off the compression device is to collect the on-off signal of the compression device by the main control board, and then the main control board outputs a signal to the 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 more components, has a slow response speed, and as long as any one component is damaged, the compression device cannot be shut off, which will lead to serious consequences.

[0088] There are also some methods for shutting off the compression device where the pressure switch is directly connected to control the power supply of the compressor, and the compressor is stopped by disconnecting the power supply. However, if the power supply is a single-phase power supply, the effect of controlling the compressor to stop cannot be achieved.

[0089] 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.

[0090] Based on this, the present application provides a turn-off protection, driving, overvoltage turn-off system, a heat pump device, and an electrical equipment. The turn-off protection system includes a pressure switch device, a first control device, a driving device, and a second control device. The pressure switch device is configured to turn off when detecting that the system pressure is overpressure, and output a pressure switch action signal. The first control device is signal-connected to the pressure switch device, and is configured to output a first driving signal, and further configured to stop outputting the first driving signal according to the pressure switch action signal. The driving device is connected to the compression device, 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. The second control device is connected to the first control device and the driving device, and is configured to output a fault protection signal to the driving device when obtaining the pressure switch action signal and the first driving signal from the first control device, and the fault protection signal is used to control the driving device to stop outputting the second driving signal. When the system is overpressured, the control device controls the driving device of the compression device to stop outputting the driving signal, so as to control the compression device to turn off. The second control device is further configured to control the driving device to stop outputting the driving signal when the system is overpressured. The first control device and the second control device not only provide double turn-off protection, improve the efficiency and success rate of turning off the compression device, but also improve the safety factor of the air-conditioning system and the heat pump system.

[0091] Please refer to Figure 1 , an embodiment of the present application provides a turn-off protection system 10, which is signal-connected to a pressure switch device 100 during use. The pressure switch device 100 is configured to turn off when detecting that the system is overpressured, and output a pressure switch action signal. The system pressure is, for example, the air-conditioning system pressure, or the pressure of a part of the system in the air conditioner (for example, the pressure of the air-conditioning indoor unit).

[0092] When the system is operating normally (the system is not overpressured), the pressure switch device 100 may be in a normally closed state, and the pressure switch device 100 is disconnected when the system is overpressured. When the system is operating normally, the pressure switch device 100 may be in a normally open state, and the pressure switch device 100 is closed when the system is overpressured. When the system pressure is overpressured, the state of the pressure switch device 100 needs to be changed to a state opposite to the normal state.

[0093] The pressure switch device 100 may be a switch in an external device used to detect whether the system is overpressured.

[0094] The turn-off protection system 10 includes a first control device 200 and a second control device 300.

[0095] When in use, the first control device 200 is signal-connected to the pressure switch device 100, and is used for outputting a first driving signal, and is further used for stopping outputting the first driving signal according to the pressure switch action signal. The first driving signal is used for instructing the driving device 400 of the compression device 20 to drive the compression device 20 to operate. The driving device 400 is connected to the compression device 20, and the driving device 400 can be understood as a compressor driving module. The driving device 400 is used for outputting a second driving signal to the compression device 20 after receiving the first driving signal, and the second driving signal is used for driving the compression device 20 to operate. Without the first driving signal, the driving device 400 will not output the second driving signal, nor will it drive the compression device 20 to operate. The first control device 200 is, for example, a logic chip, and mechanically triggers to stop outputting the first driving signal after receiving the pressure switch action signal.

[0096] The second control device 300 is connected to the first control device 200, and is also connected to the driving device 400 when in use. The second control device 300 is used for outputting a fault protection signal to the driving device 400 when obtaining the pressure switch action signal and the first driving signal from the first control device 200. The fault protection signal is used for controlling the driving device 400 to stop outputting the second driving signal to the compression device 20. The purpose of the second control device 300 outputting the fault protection signal to the driving device 400 is to prevent the situation that the first control device 200 does not stop outputting the first driving signal when it has already received the pressure switch action signal. By inputting the fault protection signal to the driving device 400, the driving device 400 can be further controlled to stop outputting the second driving signal.

[0097] In summary, the present embodiment provides a turn-off protection system 10, including a first control device 200 and a second control device 300. The first control device 200 is signal-connected to the pressure switch device 100, and is used for outputting a first driving signal, and is further used for stopping outputting the first driving signal according to the pressure switch action signal. The pressure switch device 100 is used for turning off when detecting that the system pressure is overpressure, and outputting a pressure switch action signal. The second control device 300 is connected to the first control device 200, and is also connected to the driving device 400 of the compression device 20 when in use. The second control device 300 is used for outputting a fault protection signal to the driving device 400 when obtaining the pressure switch action signal and the first driving signal from the first control device 100. The fault protection signal is used for controlling the driving device 400 to stop outputting the driving signal, the second driving signal, to the compression device 20.

[0098] Therefore, when the system is overvoltage, the control device controls the drive device 400 of the compression device 20 to stop outputting the drive signal, thereby controlling the compression device 20 to turn off. The second control device 300 is also used to control the drive device 400 to stop outputting the drive signal when the system is overvoltage. The first control device 200 and the second control device 300 not only provide dual turn-off protection, improve the efficiency and success rate of turning off the compression device 20, but also improve the safety factor of the air-conditioning system and the heat pump system.

[0099] In addition, during overvoltage protection, there is no need to perform software logic judgment. The hardware is directly turned off by signal drive, with fewer required components, faster and safer response, improved efficiency and success rate of turning off the compression device 20, and improved safety factor of the air-conditioning system and the heat pump system.

[0100] Please refer to Figure 2 , the turn-off protection system 10 provided by an embodiment of the present application further includes a third control device 500. The third control device 500 is connected to the first control device 200 and the pressure switch device 100, and is used to output a third drive signal, and the third drive signal is used to drive the first control device 200 to output the first drive signal. The third control device 500 is also used to stop outputting the third drive signal according to the pressure switch action signal.

[0101] In an optional embodiment, the second control device 300 is connected to the pressure switch device 100. The second control device 300 is used to output a reset signal to the third control device 500 according to the pressure switch action signal. The third control device 500 is signal-connected to the first control device 200. The third control device 500 is used to control the first control device 200 to stop outputting the first drive signal according to the pressure switch action signal.

[0102] The purpose of the second control device 300 outputting the reset signal to the third control device 500 is to prevent the situation that the first control device 200 does not stop outputting the first drive signal when it has received the pressure switch action signal, and to control the first control device 200 to stop outputting the first drive signal through the third control device 500.

[0103] Specifically, the third control device 500 is specifically used to obtain the pressure switch action signal and also obtain the output signal of the first control device 200. When the output signal of the first control device 200 is the first drive signal, the reset signal is output to the third control device 500, and the third control device 500 stops outputting the third drive signal to the first control device 200 after receiving the reset signal. More specifically, when it is determined that the output signal of the first control device 200 is the first drive signal, the second control device 300 outputs a signal of the failure of the first control device 200 to the third control device 500 through a pin. The third control device 500 stops outputting the third drive signal to the first control device 200 after receiving the signal of the failure of the first control device 200. Therefore, by controlling the first control device 200 to stop outputting the first drive signal through the third control device 500, the compression device 20 can be further guaranteed to be shut down.

[0104] In summary, the shutdown protection system 10 provided in this embodiment also includes a third control device 500. The second control device 300 is used to output a reset signal to the third control device 500 according to the pressure switch action signal, and the third control device 500 is used to control the first control device 200 to stop outputting the first drive signal according to the reset signal. In this way, if the first control device 200 does not stop outputting the first drive signal after receiving the pressure switch action signal, the third control device 500 can further control the first control device 200 to stop outputting the first drive signal, thereby improving the shutdown success rate of the compression device 20.

[0105] See also Figure 3 , the shutdown protection system 10 provided by an embodiment of the present application further includes a signal output circuit 600. One end of the signal output circuit 600 is connected to the second control device 300, and the other end is connected to the drive device 400. The second control device 300 outputs the fault protection signal to the drive device 400 through the signal output circuit 600. Optionally, the drive device 400 also outputs a low pulse feedback signal to the second control device 300 through the signal output circuit 600. The low pulse feedback signal is used to indicate that the drive device 400 has stopped outputting the second drive signal.

[0106] Specifically, the fault protection signal is used to stimulate the signal output circuit 600 to transmit a high-level signal to the driving device 400, so that the driving device 400 stops outputting the second driving signal under the action of the high-level signal. The high-level signal comes from a high-level power supply connected to the signal output circuit 600, and the high-level power supply can be a power supply provided in the module where the compression device 20 is located, and the high-level power supply is, for example, a 15V power supply.

[0107] Figure 3 The signal output circuit 600 shown in the figure is a schematic of such a signal output circuit 600. The signal output circuit 600 includes a first triode Q1 and a second triode Q2.

[0108] The base of the first triode Q1 is connected to the output of the second control device 300, and the emitter of the first triode Q1 is grounded. The emitter of the second triode Q2 is connected to the first power supply 21, the base is connected to the collector of the first triode, and the collector is connected to the first pin of the driving device 400. The first triode Q1 can be an NPN-type triode, and the second triode Q2 can be a PNP-type triode. The second control device 300 first outputs the fault protection signal to turn on the first triode Q1. The emitter of the second triode Q2 is connected to the first power supply 21. After the first triode Q1 is turned on, the second triode Q2 is turned on. Then, the first power supply 21 outputs a high-level signal to the driving device 400, and after receiving the high-level signal, the driving device 400 stops outputting the second driving signal.

[0109] That is, the fault protection signal is used to turn on the first triode and the second triode, so that after the driving device 400 receives the voltage signal (i.e., the high-level signal described above) output by the first power supply 21 through the first pin, it stops outputting the second driving signal.

[0110] In an alternative embodiment, the signal output circuit 600 further includes a diode D1. The positive electrode of the diode D1 is connected to the collector of the second triode, and the negative electrode of the diode D1 is connected to the first pin on the driving device 400. The diode D1 can filter out the impurity signals in the voltage signal (i.e., the high-level signal described above) output by the first power supply 21.

[0111] In an alternative embodiment, the signal output circuit 600 further includes a resistor R1, a resistor R2, a resistor R3, and a resistor R4.

[0112] One end of the resistor R1 is connected to the output of the second control device 300, and the other end is connected to the base of the first triode Q1. One end of the resistor R2 is connected to the collector of the first triode Q1, and the other end is connected to the base of the second triode Q2. One end of the resistor R3 is connected to the other end of the resistor R2 and is also connected to the base of the second triode Q2. The other end of the resistor R3 is connected to the output of the first power supply 21. One end of the resistor R4 is connected to the negative electrode of the diode D1, and the other end is connected to the first pin of the driving device 400.

[0113] The functions of the resistor R1, resistor R2, resistor R3, and resistor R4 are to stabilize the signal transmission, so as to increase the probability that the driving device 400 successfully receives the voltage signal (i.e., the high-level signal described above) output by the first power supply 21, thereby increasing the probability of the compression device 20 turning off.

[0114] In an alternative embodiment, the driving device 400 further includes a second pin, which is connected to the first feedback pin of the second control device 300, and a power supply (such as Figure 3 the 3.3V power supply shown) is also provided on the connection link. When the driving device 400 stops outputting the second driving signal, a pulse signal is sent to the first feedback pin through the second pin. If the second control device 300 does not receive the pulse signal, it can send the fault protection signal to the driving device 400 again to trigger the driving device 400 to stop outputting the second driving signal again. In this way, the success rate of controlling the driving device 400 to stop outputting the second driving signal is improved through the feedback of the pulse signal, and further the success rate of the compression device 20 turning off during system overvoltage is improved.

[0115] Multiple resistors ( Figure 3 exemplarily two resistors are shown) can also be provided on the line where the second pin of the driving device 400 is connected to the first feedback pin of the second control device. The multiple resistors are used to stabilize the signal output by the driving device 400 and filter out some impurity signals.

[0116] In summary, the turn-off protection system 10 provided in this embodiment further includes a signal output circuit 600. The signal output circuit 600 is provided with a first triode Q1 and a second triode Q2 that can be sequentially turned on. The base of the first triode Q1 is connected to the output of the second control device 300, and the emitter is grounded. The emitter of the second triode Q2 is connected to the first power supply 21, the base is connected to the collector of the first triode, and the collector is connected to the first pin of the driving device 400. Then, after the fault protection signal turns on the first triode Q, the second triode Q2 is turned on, so that the driving device 400 stops outputting the second driving signal after receiving the voltage signal output by the first power supply 21 through the first pin. Through the signal output circuit 600, the success rate of controlling the driving device 400 to stop outputting the second driving signal can be improved, thereby increasing the turn-off rate of the compression device 20 during system overvoltage.

[0117] Please refer to Figure 4 , a turn-off protection system 10 provided in an embodiment of the present application further includes the pressure switch device 100 described above. The pressure switch device 100 includes a pressure detection switch 110.

[0118] Such as Figure 4As shown, one end of the pressure detection switch 110 is connected to the enable pin of the first control, is also connected to the pin of the third control device 500, and is also connected to the second power supply 22. The second power supply 22 can be a power supply provided in the module board where the compression device 20 is located, and the second power supply 22 is, for example, a 3.3V power supply. The other end of the pressure detection switch 110 is grounded.

[0119] When the pressure detection switch 110 is closed, the enable pin of the first control device 200 is grounded, and the pin of the second control device 300 and the pin of the third control device 500 will not receive a voltage signal, that is, will not receive the pressure switch action signal.

[0120] When the pressure detection switch 110 is turned off, the enable pin of the first control device 200 receives the voltage signal output by the second power supply 22 as the pressure switch action signal. Similarly, the second control device 300 and the third control device 500 receive the voltage signal output by the second power supply 22 as the pressure switch action signal.

[0121] In an optional embodiment, the pressure switch device 100 further includes a resistor R5, a resistor R6, a resistor R7 and a resistor R8.

[0122] One end of the resistor R5 is connected to the second power supply 22, and the other end is connected to one end of the pressure detection switch 110, and is also connected to the enable pin of the first control device 200. One end of the resistor R6 is connected to the second power supply 22, and the other end is connected to the other end of the resistor R5, and is also connected to the enable pin of the first control device 200. The resistor R5 and the resistor R6 are in parallel. The function of the resistor R5 and the resistor R6 is to stabilize the voltage signal output by the second power supply 22 and filter out some impurity signals in the voltage signal when the pressure detection switch 110 is turned off due to system overvoltage.

[0123] One end of the resistor R7 is connected to one end of the pressure detection switch 110 and is also connected to the enable pin of the first control device 200, and the other end of the resistor R7 is connected to a pin of the second control device 300. One end of the resistor R8 is connected to one end of the resistor R7 and is also connected to the enable pin of the first control device 200, and the other end of the resistor R8 is connected to another pin of the second control device 300. The resistors R7 and R8 are used to stabilize the voltage signal output by the second power supply 22 and filter out some impurity signals in the voltage signal when the pressure detection switch 110 is turned off due to system overvoltage.

[0124] In summary, the pressure switch device 100 in the turn-off protection system 10 provided in this embodiment includes a pressure detection switch 110. The pressure detection switch 110 is connected to the second power supply 22 and is also respectively connected to the first control device 200, the second control device 300, and the third control device 500. When the system is not over-voltage, the pressure detection switch 110 is in a normally closed state, and the enable pin of the first control device 200 does not receive the pressure switch action signal. Similarly, neither the second control device 300 nor the third control device 500 receives the pressure switch action signal. When the system is over-voltage, the pressure detection switch 110 is turned off, and the first control device 200, the second control device 300, and the third control device 500 all receive the voltage signal output by the second power supply 22 as the pressure switch action signal.

[0125] Please refer to Figure 5 , in the turn-off protection system 10 provided by an embodiment of the present application, the first control device 200 includes N bridge arm pulse width modulation (Pulse width modulation, abbreviated as PWM) circuits 210, and the number of N is determined by the requirements of the driving device 400. Figure 5 As shown, the first control device 200 includes two bridge arm PWM circuits 210, namely, the upper bridge arm 3-channel PWM circuit 210 and the lower bridge arm 3-channel PWM circuit 210. Each bridge arm PWM circuit 210 includes a triode, and the first control device 200 includes a triode array.

[0126] The N bridge arm PWM circuits 210 are all driven to conduct by the third driving signal output by the third control device 500. In order to prevent the bridge arm PWM circuits 210 from affecting each other, the conduction time of each bridge arm PWM circuit 210 in the N bridge arm PWM circuits 210 can be different. The third driving signal output by the third control device 500 is a pulse signal, and the first driving signal output by the first control device 200 is also a pulse signal. Optionally, the first control device 200 can be an 8-channel buffer.

[0127] In an optional embodiment, the turn-off control system further includes a first protection device 700 and a second protection device 800. One end of the first protection device 700 and the second protection device 800 are both connected to the driving device 400, and the other end is both connected to the first control device 200. The first protection device 700 and the second protection device 800 are both used to buffer the output of the first control device 200.

[0128] Optionally, the first protection device 700 includes a first resistor R9 and a first capacitor C1. One end of the first resistor R9 is connected to a bridge arm PWM circuit 210 (such as Figure 5The upper-bridge-arm 3-channel PWM circuit 210 shown, with the other end connected to the drive device 400. One end of the first capacitor C1 is connected to the other end of the first resistor R9, and the other end is grounded. The first resistor R9 and the first capacitor C1 can perform stabilization processing and buffering processing on the first drive signal output by the upper-bridge-arm 3-channel PWM circuit 210.

[0129] Optionally, the second protection device 800 includes a second resistor R10, a third resistor R11, and a second capacitor C2. One end of the second resistor R10 is connected to a bridge-arm PWM circuit 210 (such as Figure 5 the lower-bridge-arm 3-channel PWM circuit 210 shown)

[0130] and the other end is connected to the drive device 400. One end of the third resistor R11 is connected to one end of the second resistor R10, and the other end is grounded. One end of the second capacitor C2 is connected to the other end of the second resistor R10, and the other end is grounded.

[0131] The second resistor R10, the third resistor R11, and the second capacitor C2 can perform stabilization processing and buffering processing on the first drive signal output by the lower-bridge-arm 3-channel PWM circuit 210.

[0132] The resistance values of the first resistor R9, the second resistor R10, and the third resistor R11 can all be selected according to actual needs, and are not limited in this embodiment.

[0133] The specifications of the first capacitor C1 and the second capacitor C2 can be selected according to actual needs, and are not limited in this embodiment.

[0134] In an optional embodiment, the circuit for transmitting the output signal of the first control device 200 between the first control device 200 and the second control device 300 includes a resistor R12 and a capacitor C3.

[0135] One end of the resistor R12 is connected to the output of the first control device 200 (for example Figure 5 the connection to the lower-bridge-arm PWM circuit 210 shown), and the other end of the resistor R12 is connected to the pin of the second control device 300. One end of the capacitor C3 is connected to one end of the resistor R12, and the other end is grounded. The resistor R12 and the capacitor C3 can perform stabilization processing on the signal output by the first control device 200, and can also filter out the impurity signals in the signal output by the first control device 200.

[0136] In summary, in the overvoltage protection of the shutdown control system provided in the above embodiments of the present application, when the system is overvoltage, the first control device 200 controls the driving device 400 of the compression device 20 to stop outputting a driving signal, so as to control the shutdown of the compression device 20. In 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 components 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.

[0137] It should also be noted that the type of power supply in the shutdown control system provided in the above embodiments of the present application is not limited, and it can also be a single-phase power supply.

[0138] Please refer to Figure 6 , the shutdown protection system 10 provided in an embodiment of the present application further includes the driving device 400. The model, specification, etc. of the driving device 400 can be selected according to actual needs, and are not limited in this embodiment. The driving device 400 determines the number of PWM circuits 210 in the first control device 200.

[0139] 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 for heating liquid water. The heat pump device 30 is, for example, a heat pump pool machine, which is generally installed beside the pool and used for heating the water in the pool. The compression device 20 can be arranged inside the heating device 31 or outside the heating device 31.

[0140] Please refer to Figure 8 , an embodiment of the present application further provides an electrical device 40, which 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.

[0141] Please refer to Figure 9 , an embodiment of the present application provides a driving system 50, which includes the shutdown protection system 10 provided in any of the above embodiments, and further includes a driving device 400. When in use, the driving device 400 is connected to the compression device 20, and is used to output a second driving signal to the compression device 20 after receiving the first driving signal output by the first control device 200, so as to drive the compression device 20 to work. The model, specification, etc. of the driving device 400 can be selected according to actual needs, and are not limited in this embodiment. The driving device 400 determines the number of PWM circuits 210 in the first control device 200. The driving system 50 may further include the pressure switch device 100 described above.

[0142] Please refer to Figure 10 An embodiment of the present application provides an overvoltage shutdown system 60. The overvoltage shutdown system 60 is the same as the shutdown protection system 10 provided in any of the above embodiments, and further includes a pressure switch device 100. The pressure switch device 100 is configured to shut down when detecting system overvoltage and output a pressure switch action signal. The description of the pressure switch device 100 can refer to the description of the pressure switch device 100 when describing the shutdown protection system 10 in the above embodiments, and will not be elaborated here. The overvoltage shutdown system 60 may further include the driving device 400 described above.

[0143] 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 includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "including one..." does not exclude the presence of additional identical elements in the process, method, article or device including such element.

[0144] The serial numbers of the embodiments of the present application above are only for description and do not represent the advantages or disadvantages of the embodiments.

[0145] 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 content of the specification and drawings of the present application, 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 protection system, characterized in that, it includes: A first control device, which is signal-connected to a pressure switch device during use, is used to output a first driving signal, and is also used to stop outputting the first driving signal according to the pressure switch action signal. The pressure switch device is used to shut down when the system pressure is overpressure and output a pressure switch action signal; the first driving signal is used to instruct the driving device of the compression device to output a second driving signal to the compression device; The second driving signal is used to drive the compression device to work; A second control device, connected to the first control device, and also connected to the driving device during use. The second control device is used to output a fault protection signal to the driving device when obtaining the pressure switch action signal and the first driving signal from the first control device. The fault protection signal is used to control the driving device to stop outputting the driving signal, the second driving signal, to the compression device; It further includes: A third control device, connected to the first control device and the pressure switch device, is used to output a third driving signal, and to stop outputting the third driving signal according to the pressure switch action signal. The third driving signal is used to drive the first control device to output the first driving signal; The second control device is also connected to the third control device; The second control device is further used to send a reset signal to the third control device when obtaining the pressure switch action signal and the first driving signal from the first control device. The reset signal is used to make the third control device control to stop outputting the third driving signal.

2. The shutdown protection system according to claim 1, characterized in that, it further includes: A signal output circuit, one end is connected to the second control device, and the other end is connected to the driving device.

3. The shutdown protection system according to claim 2, characterized in that, The signal output circuit includes: A first triode, the base is connected to the output of the second control device, and the emitter is grounded; A second triode, the emitter is connected to a first power supply, the base is connected to the collector of the first triode, and the collector is connected to the first pin of the driving device; The fault protection signal is used to turn on the first triode and the second triode, so that the driving device stops outputting the second driving signal after receiving the voltage signal output by the first power supply through the first pin.

4. The shutdown protection system according to claim 3, characterized in that, The signal output circuit further includes: A diode, the positive pole is connected to the collector of the second triode, and the negative pole is connected to the first pin.

5. The shutdown protection system according to claim 2, characterized in that, The driving device further includes a second pin, and the second pin is connected to the first feedback pin of the second control device; When the driving device stops outputting the second driving signal, it sends a pulse signal to the first feedback pin through the second pin.

6. The shutdown protection system according to claim 1, characterized in that, it further includes the pressure switch device, and the pressure switch device includes: A pressure detection switch, one end of which is connected to the enable pin of the first control device, is also respectively connected to the pins of the second control device and the third control device, and is also connected to a second power supply. The other end of the pressure detection switch is grounded; the pressure detection switch is used to turn off when detecting overpressure in the system; When the pressure detection switch is closed, the enable pin of the first control device is grounded; When the pressure detection switch is turned off, the voltage signal output by the second power supply received by the enable pin of the first control device is the pressure switch action signal.

7. The overvoltage shutdown protection system according to any one of claims 1-6, characterized in that, The first 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 overvoltage shutdown protection system according to claim 7, characterized in that, Each bridge arm PWM circuit includes a triode.

9. The overvoltage shutdown protection system according to claim 7, characterized in that, The first control device includes an 8-channel buffer.

10. The overvoltage shutdown protection system according to claim 7, characterized in that, It further includes a first protection device and a second protection device; One end of the first protection device and the second protection device are both connected to the driving device, and the other end is both connected to the first control device, and is used to buffer the output of the control device.

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

12. The overvoltage shutdown protection system according to claim 10, characterized in that, The second protection device includes: A second resistor, one end of which is connected to a bridge arm PWM circuit, and the other end is connected to the driving device; A third resistor, one end of which is connected to one end of the second resistor, and the other end is grounded; A second capacitor, one end of which is connected to the other end of the second resistor, and the other end is grounded.

13. The overvoltage shutdown protection system according to claim 1, characterized in that, It further includes: A driving device, which is connected to a compression device during use, 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.

14. A heat pump device, characterized in that, It includes the overvoltage shutdown protection system according to any one of claims 1-12, and further includes: A compression device; A heat exchange device, and the heat exchange device is used to heat liquid water.

15. An electrical equipment, characterized in that, It includes the heat pump device according to claim 14.

16. A drive system, characterized in that, It includes the overvoltage shutdown protection system according to any one of claims 1-12, and further includes: A driving device, which is connected to a compression device during use, and is used to output a second driving signal to the compression device after receiving the first driving signal output by the first control device, so as to drive the compression device to work.

17. An overvoltage shutdown system, Characterized in that Comprising the turn-off protection system according to any one of claims 1-12, further comprising: A pressure switch device for turning off when detecting overpressure of the system and outputting a pressure switch operation signal.

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