Air conditioning system running state detection method, controller and air conditioning system

Abstract

The invention discloses an air conditioner system operation state detection method, a controller and an air conditioner system.The detection method comprises the steps that in the power-losing state of a valve body driving part, a first power supply supplies power to a detection part and the valve body driving part, and the detection end of the detection part conducts signal detection on a first electric connection end; the control part obtains a detection signal detected by a signal detection end of the detection part; the control part judges whether the electric control valve assembly is in a normal wiring state or not according to the detection signal value. According to the technical scheme, faults can be rapidly detected under the abnormal wiring conditions such as wire breakage or disconnection of the electric control valve assembly in the product assembling, factory leaving or equipment application process, and the troubleshooting difficulty is lowered.

Description

Technical Field

[0001] The present invention belongs to the field of refrigeration technology, and in particular relates to an air-conditioning system operating status detection method, a controller and an air-conditioning system. Background Art

[0002] The electric control valve assembly uses a valve operated by a motor or electromagnetic to control the flow of fluids, such as gas or liquid. The working principle is mainly to control the opening or closing of the valve through an electrical signal to adjust the flow rate or flow velocity of the fluid. The electric control valve assembly at least includes a valve body drive unit and a valve body. The valve body drive unit has two electrical connection ends, and the valve body drive unit is connected to the electric control circuit to be connected through the two electrical connection ends. After being connected to the electric control circuit, as far as the inventor knows, the valve body drive unit usually drives the valve body to work when the electrical connection end is energized, and the valve body drive unit does not drive to work when the electrical connection end is de-energized. The electric control valve assembly can be a reversing valve, a four-way valve or a solenoid valve, etc. Taking the solenoid valve as an example, the solenoid valve includes a valve body and a relay. The relay includes a coil, and the coil has two connection contacts. The energization and de-energization of the relay are related to whether the connection contacts are energized.

[0003] According to the above working principle of the electric control valve assembly, it can be applied to the mode switching of some electrical equipment. For example, in an air conditioning system, the hot and cold mode switching and pressure balance adjustment can be achieved by controlling the opening and closing of the electric control valve assembly.

[0004] However, in existing electric control valve components, whether in performance testing before leaving the factory or when applied to products, if a broken line or disconnected connection occurs, it is not easy to detect the fault, making troubleshooting difficult. Summary of the invention

[0005] In view of this, the object of the present invention is to provide an air-conditioning system operating status detection method, controller and air-conditioning system, which can quickly detect and troubleshoot abnormal wiring conditions such as disconnection or disconnection of the electric control valve component during product assembly, delivery or equipment application, thereby reducing the difficulty of troubleshooting.

[0006] A first aspect of an embodiment of the present application provides a method for detecting the operating status of an air-conditioning system, wherein the air-conditioning system includes an electric control valve assembly, a control module and a first power supply, the control module includes a detection unit and a control unit, the electric control valve assembly includes a valve body drive unit, the valve body drive unit has a first electrical connection end, the first electrical connection end is electrically connected to the detection end of the detection unit, the signal detection end of the detection unit is electrically connected or signal-connected to the input end of the control unit, and the first electrical connection end is also electrically connected or signal-connected to the output end of the control unit; the detection method includes: when the valve body drive unit is in a power-off state and the first power supply supplies power to the detection unit and the valve body drive unit, the detection end of the detection unit performs signal detection on the first electrical connection end; the input end of the control unit obtains the detection signal detected by the signal detection end of the detection unit; the control unit determines whether the electric control valve assembly is in a normal wiring state based on the detection signal value.

[0007] It can be seen from the above technical scheme that in the present application, a method for detecting the operating status of an air-conditioning system is used. When the valve body drive unit is powered off and the first power supply supplies power to the detection unit and the valve body drive unit, the detection end of the detection unit performs signal detection on the first electrical connection end, and the control unit determines whether the electric control valve assembly is in a normal wiring state based on the detection signal value. In the present technical scheme, the detection function and the control function are integrated into one module. In the event of abnormal wiring such as disconnection or disconnection of the electric control valve assembly during product assembly, delivery or equipment application, it can quickly detect and troubleshoot, reducing the difficulty of troubleshooting.

[0008] A second aspect of an embodiment of the present application provides a method for detecting the operating status of an air-conditioning system, the air-conditioning system comprising an electric control valve assembly, a control module, a detection module and a first power supply, the electric control valve assembly comprising a valve body drive unit, the valve body drive unit having a first electrical connection end, the first electrical connection end being electrically connected to a detection end of the detection module, the signal detection end of the detection module being electrically connected or signal-connected to the control unit, and the first electrical connection end being electrically connected or signal-connected to the control unit;

[0009] The detection method includes: when the valve body drive unit is in a power-off state, the first power supply supplies power to the detection module and the valve body drive unit, and the detection end of the detection module performs signal detection on the first electrical connection end; the control module obtains the detection signal detected by the signal detection end of the detection module; the control module determines whether the electric control valve assembly is in a normal wiring state based on the detection signal value.

[0010] It can be seen from the above scheme that in the present application, a method for detecting the operating status of an air-conditioning system is used. When the valve body drive unit loses power and the first power supply supplies power to the detection unit and the valve body drive unit, the detection end of the detection module performs signal detection on the first electrical connection end, and the control module determines whether the electric control valve assembly is in a normal wiring state according to the detection signal value. In this technical solution, the detection function and the control function are respectively arranged in two modules. In the process of product assembly, delivery or equipment application, in the event of abnormal wiring such as disconnection or disconnection of the electric control valve assembly, it can quickly detect and troubleshoot, reducing the difficulty of troubleshooting.

[0011] A third aspect of an embodiment of the present application provides a controller, including a control module, which includes a detection unit and a control unit; the signal detection end of the detection unit is electrically connected to the input end of the control unit; the detection end of the detection unit can be used to be electrically connected to the first electrical connection end of the valve body drive unit, and the second electrical connection end of the valve body drive unit is grounded; the control unit can be used to be electrically connected to the first electrical connection end of the valve body drive unit through the output end; the detection end of the detection unit is electrically connected or signal-connected to the first electrical connection end, and the signal detection end of the detection unit is electrically connected or signal-connected to the control unit; when the valve body drive unit is powered off, the first power supply supplies power to the detection unit and the valve body drive unit, and the detection end of the detection unit performs signal detection on the first electrical connection end of the valve body drive unit; the control unit can be used to obtain the detection signal detected by the signal detection end of the detection unit through the input end; the control unit can be used to determine whether the electric control valve assembly is in a normal wiring state based on the size of the detection signal value.

[0012] It can be seen from the above scheme that a controller in the present application includes a control module, which integrates detection function and control function. It can quickly detect and troubleshoot abnormal wiring conditions such as disconnection or disconnection of the electric control valve component during product assembly, delivery or equipment application, thereby reducing the difficulty of troubleshooting.

[0013] The fourth aspect of the embodiment of the present application provides an air-conditioning system, including a prompt mechanism, an electric control valve assembly, a control module and a first power supply, the control module includes a detection unit and a control unit, the electric control valve assembly includes a valve body drive unit, the valve body drive unit has a first electrical connection end, the first electrical connection end is electrically connected to the detection end of the detection unit, the second electrical connection end is grounded, the signal detection end of the detection unit is electrically connected or signal-connected to the input end of the control unit, and the first electrical connection end is also electrically connected or signal-connected to the output end of the control unit; the output end of the control unit is electrically connected to the prompt mechanism; the detection unit can be used when the valve body drive unit is in a power-off state, and the detection unit supplies power to the detection unit and the valve body drive unit through the first power supply, and the first power supply is used to perform signal detection on the first electrical connection end through the detection end; the control unit can be used to detect the detection signal detected by the signal detection end of the detection unit; judge whether the electric control valve assembly is in a normal wiring state according to the detection signal value; the prompt mechanism can be used to give a fault prompt when a fault prompt control signal is obtained.

[0014] The control module of the air conditioning system of the present application integrates the detection function and the control function. When the control valve body drive unit loses power and the first power supply supplies power to the detection unit and the valve body drive unit, the detection end of the detection unit performs signal detection on the first electrical connection end, and the control unit determines whether the electric control valve assembly is in a normal wiring state according to the detection signal value. In the process of product assembly, factory delivery or equipment application, when the electric control valve assembly is disconnected or not connected, etc., the fault can be quickly detected and troubleshooted, which reduces the difficulty of troubleshooting. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0016] Figure 1 It is a logic control schematic block diagram of an embodiment of the air conditioning system operating status detection method of the present application;

[0017] Figure 2 It is a logic control schematic block diagram of another embodiment of the air conditioning system operating status detection method of the present application;

[0018] Figure 3 to Figure 6 This application Figure 1 A schematic diagram of a circuit principle for voltage detection by a detection unit in an embodiment;

[0019] Figure 7-Figure 8 This application Figure 1 A schematic diagram of the circuit principle of the current detection embodiment performed by the detection unit in the embodiment;

[0020] Fig. 9 It is a logic schematic block diagram of an embodiment of the controller of the present application;

[0021] Fig.10 It is a hardware block diagram of an air conditioning system according to an embodiment of the present application. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0023] An embodiment of the present application provides a method for detecting the operating status of an air conditioning system. Figure 1 As shown, the air conditioning system includes an electric control valve assembly, a first power supply V1 of the control module, the control module includes a detection unit and a control unit, the electric control valve assembly includes a valve body drive unit, and the valve body drive unit has a first electrical connection terminal K1. The first electrical connection terminal K1 is electrically connected to the detection end of the detection unit, and the valve body drive unit may also include a second electrical connection terminal K2 for grounding GND, and connecting the valve body drive unit in series to the control circuit. The signal detection end of the detection unit is electrically connected or signal-connected to the input end of the control unit, and the first electrical connection terminal K1 is also electrically connected or signal-connected to the output end of the control unit;

[0024] Methods include:

[0025] S101: When the valve body driving unit loses power and the first power supply V1 supplies power to the detection unit and the valve body driving unit, the detection end of the detection unit performs signal detection on the first electrical connection end;

[0026] When the valve body driving part loses power and does not work, the first power supply V1 supplies power to the detection part and the valve body driving part to form a detection loop.

[0027] S103: The control unit obtains a detection signal detected by the signal detection end of the detection unit;

[0028] The signal detection end of the detection part is electrically connected to the input end of the control part, and the control part obtains the detection signal through the input end.

[0029] S105: The control unit determines whether the electric control valve assembly is in a normal wiring state based on the detection signal value.

[0030] The control unit compares the obtained detection signal value with the threshold value stored in the control unit to determine whether the electric control valve assembly is normally wired or abnormally wired. As an example of a method for determining whether the electric control valve assembly is normally wired, considering the influence of current fluctuations, the threshold value stored in the control unit under the normal wiring condition of the electric control valve assembly is a numerical range, and this numerical range can be obtained in advance through experimental testing. If the detection signal value obtained at the moment is not within this numerical range, it is considered that the electric control valve assembly is abnormally wired. Of course, the above judgment method is only used as an example and does not constitute a limitation. With respect to the technical solution of this application, the following points need to be explained here: 1. The electrical connection between the output end of the control unit and the first electrical connection end of the electric control valve assembly does not necessarily mean that the output end of the control unit is directly connected to the electric control valve, but can also be indirectly connected. In one embodiment, if the electric control valve assembly adopts a solenoid valve, the valve body drive unit refers to a relay, and the gain and loss of electricity of the relay is realized by whether the contact is electrically connected or not, and the gain and loss of electricity of the relay controls the opening and closing of the valve body to realize the working and non-working control of the valve body. The relay realizes electrical connection and disconnection control through a wire controller. 2. The detection signal detected by the detection unit in the embodiment of the present application can be a voltage signal or a current signal, etc., without limitation. 3. The connection of the electric control valve assembly in the circuit at least includes the connection status of the two electrical connection ends on the electric control valve assembly, as well as the connection status of other devices and modules in the detection circuit, etc. Therefore, normal wiring of the electric control valve assembly means that the above-mentioned connection of the electric control valve assembly is good. Abnormal wiring refers to the situation that the electric control valve assembly is not connected or disconnected due to missing connection or broken wiring. The technical solution of the present application can quickly troubleshoot the electric control valve assembly, greatly reducing the functional test detection time before the equipment leaves the factory, and avoiding the probability of defective products flowing out. Moreover, during the user's use, the troubleshooting can be completed quickly, reducing the difficulty of troubleshooting. In the embodiment of the present application, the control module integrates the detection function and the control function, and the control module can be placed in the controller, or placed next to the main control module in the air-conditioning system.

[0031] The present application provides an embodiment for the detection unit using voltage detection and current detection respectively. Of course, the embodiments are only examples of two types of electrical signal detection and do not constitute a limitation.

[0032] Embodiment 1:

[0033] like Figure 3As shown, the valve body drive unit also includes a second electrical connection terminal K2, which is grounded, and the detection unit includes a voltage-dividing resistor R1, the first end of which is electrically connected to the first power supply V1, and the second end of which can be electrically connected to the first electrical connection terminal K1 of the electric control valve assembly 03 and the input end of the control unit 02, respectively, and the second electrical connection terminal K2 of the electric control valve assembly 03 is grounded. The position where the voltage-dividing resistor R1 is connected to the first electrical connection terminal K1 of the electric control valve assembly 03 is the voltage-dividing point Q, and of course its equivalent potential is also within its protection range. In the embodiment of the present application, the detection unit adopts voltage detection.

[0034] When the electric control valve assembly is connected and the valve body drive unit is not working, the detection unit performs detection and calculates the voltage V of the divided voltage potential Q Q as follows:

[0035] If the first power supply V1 is direct current:

[0036] ① Under the condition of normal wiring of the electric control valve assembly, calculate the voltage V at the voltage dividing point Q Q .

[0037]

[0038] In formula (1), R 阀 is the equivalent resistance of the electric control valve assembly, which can be obtained through, for example, the technical specification or the instruction manual of the purchased product. From the analysis of formula (1), it can be seen that V Q <V1。

[0039] ② In the case of abnormal wiring of the electric control valve assembly, calculate the voltage V at the voltage dividing point Q Q .

[0040] The electric control valve assembly is not normally wired, so the first electrical connection terminal K1 is suspended, and the power supply size of the control unit is usually selected to be consistent with the amplitude of the first power supply V1 of the detection unit. Q =V1.

[0041] In the embodiments of the present application, Figure 4 As shown, considering that if the electric control valve assembly is driven by alternating current, when the electric control valve assembly is working normally, that is, the valve body is working, if the alternating current is in the negative half axis, it will cause the circuit to be reversely conducted, and then the components in the control unit and the voltage divider resistor are likely to be burned by the reverse high level. Therefore, in the embodiment of the present application, it is preferred to electrically connect the first reverse high-voltage protection diode D1 between the first electrical connection terminal K1 of the electric control valve assembly and the input terminal of the detection unit, and electrically connect the cathode of the first reverse high-voltage protection diode D1 to the first electrical connection terminal K1 of the electric control valve assembly, and electrically connect the anode of the first reverse high-voltage protection diode D1 to the input terminal of the detection unit 01. Here, the first reverse high-voltage protection diode D1 mainly plays the role of overvoltage protection.

[0042] Calculate the voltage V at the voltage divider point Q with reverse overvoltage protection in place Q :

[0043] ① Under the condition of normal wiring of the electric control valve assembly, calculate the voltage V at the voltage dividing point Q Q .

[0044] Calculate the voltage V at the voltage divider point Q Q .

[0045]

[0046] In formula (2), R 阀 is the equivalent resistance of the electric control valve assembly, which can be obtained through, for example, the technical specification or the instruction manual of the purchased product. V D1 is the conduction voltage of the first reverse high voltage protection diode, usually between 0.3V and 0.7V. From the analysis of formula (2), it can be seen that V Q <V1。

[0047] ② In the case of abnormal wiring of the electric control valve assembly, calculate the voltage V at the voltage dividing point Q Q .

[0048] Because the electric control valve assembly is not normally wired, the first electrical connection terminal K1 is suspended, and the power supply size of the control unit is usually selected to be consistent with the first power supply size of the detection unit. Q =V1.

[0049] exist Figure 3 and Figure 4 In the embodiment, the voltage V Q That is, the voltage at the input end of the control unit.

[0050] like Figure 4 As shown, in order to protect the control unit and prevent the high voltage from burning the control unit, a first current limiting resistor R2 is electrically connected between the voltage dividing point Q and the input end of the control unit. The first current limiting resistor R2 allows the voltage input to the input end of the control unit to be controlled within the allowable range, thereby protecting the control unit. Figure 5 In the embodiment, when the electric control valve assembly is normally connected, the voltage at the input end of the control unit is the voltage divided by the first current limiting resistor R2. When the electric control valve assembly is abnormally connected, V Q =V1.

[0051] If the first power supply is AC:

[0052] like Figure 5As shown, in order to protect the control unit from the reverse conduction of the negative half-axis voltage of the first power supply, in the state detection circuit of the electric control valve assembly, not only the first current limiting resistor R2 and the first reverse high-voltage protection diode D2 need to be set, but also the second reverse high-voltage protection diode D2 needs to be electrically connected between the input end of the control unit and the first current limiting resistor R2, the positive electrode of which is electrically connected to the first current resistor R2, and the negative electrode is electrically connected to the input end of the control unit 02.

[0053] ① Under the condition of normal wiring of the electric control valve assembly, calculate the voltage V at the voltage dividing point Q Q .

[0054]

[0055] It should be noted that, then V Q The current is fed back to the input end of the control unit through the second current limiting resistor R2 and the second reverse high voltage protection diode D2.

[0056] Since the current provided by V1 is alternating current and the electric control valve assembly is wired normally, the detection unit detects that the valve body drive unit is working normally, and the feedback signal obtained at the input end of the control unit is a small half-wave signal.

[0057] ② In the case of abnormal wiring of the electric control valve assembly, calculate the voltage V at the voltage dividing point Q Q .

[0058] Because the electric control valve assembly is not normally wired, the first interface K1 is left hanging, and the power supply size of the control unit is usually selected to be consistent with the first power supply size of the detection unit. Q =V1.

[0059] like Figure 3-Figure 4 , under normal circumstances V Q is much smaller than V1, and in abnormal wiring conditions, V Q =V1. Therefore, when the first power supply is DC, the electric control valve assembly is normally wired, and the input end of the control unit is low level, and when the wiring is abnormal, it is high level. When the first power supply is AC, the electric control valve assembly is normally wired, and the maximum amplitude obtained at the input end of the control unit is In the case of abnormal wiring, the input end of the control unit obtains a positive half-axis half-wave signal with the same amplitude as the first power supply. Figure 5 As long as the voltage drop when the second reverse high-voltage protection diode D2 is turned on is considered, the rest are the same and will not be described in detail here.

[0060] like Figure 6As shown, the power supply of the isolation detection module and the influence of the alternating current when the electric control valve assembly is working normally are used to drive the electric control valve assembly. In the embodiment of the present application, an insulated gate bipolar transistor is electrically connected between the first current limiting resistor R2 and the input end of the control unit 01, and the collector of the insulated gate bipolar transistor is connected to the collector resistor R c The collector is electrically connected to the second power supply V2, and the second power supply V2 is used to supply power to the basic circuit of the insulated gate bipolar transistor. c The connection is electrically connected to the input terminal of the control unit, a second current limiting resistor R3 is connected between the emitter and the base, and the emitter is grounded. The insulated gate bipolar transistor base is turned on at a high level and turned off at a low level. The collector is connected to the input terminal of the control unit, and the electrical signal is flipped. According to the analysis of the previous situation: when the first power supply is direct current, (1) the electric control valve assembly is connected normally, the input terminal of the control unit is at a high level; (2) the electric control assembly is not connected normally, the input terminal of the control unit is at a low level. When the first power supply is alternating current, (1) the electric control valve assembly is connected normally, the input terminal of the control unit obtains a maximum amplitude of PWM square wave signal; (2) if the electric control valve assembly is not connected normally, the input end of the control unit obtains a PWM square wave signal with the same maximum amplitude as the first power supply. In the embodiment of the present application, the insulated gate bipolar transistor (IGBT) includes a power transistor (Giant Transistor—GTR) and a power field effect transistor (Power MOSFET). IGBT is also a three-terminal device including a gate, a collector and an emitter.

[0061] In one application embodiment, if the electric control valve assembly adopts a solenoid valve, the valve body driving part of the electric control valve assembly is a relay. A connecting contact of the coil of the relay is electrically connected to the main circuit of the two-way selection switch, the first branch is electrically connected to the external power supply V3, and the second branch is electrically connected to the internal power supply V4. The external power supply refers to an external power supply other than the electrical appliance of the electric control valve assembly state detection part. As mentioned above, the connection or disconnection of the external power supply and the first branch can be realized by a wire controller, specifically, the control module sends a connection or disconnection control instruction or a valve body working or non-working instruction to the wire controller. The internal power supply refers to the power supply of the air conditioning system that applies the above-mentioned electric control valve assembly state detection method. The internal power supply and the external power supply can both be alternating current, for example, a 24VAC alternating current power supply is selected. Then, when the first branch is turned on but the external power supply is not powered, the valve body driving part does not work. The scenarios applicable to the situation where the electric control valve assembly is driven by the power supply and the valve body does not work mentioned in the embodiment of the present application are as follows: (1) when the air conditioning equipment is in normal operation, it stops running when the temperature reaches the set temperature, and stops running during the process of restarting after the temperature deviates from the set temperature. It also applies to (2) the period before the equipment starts and runs smoothly. The two situations described here are for example only and do not constitute a limitation. In these cases, the state detection method of the electric control valve assembly in the embodiment of the present application is used to detect whether the electric control valve assembly is normally connected. When the second branch is connected, the control unit also sends a connection or disconnection control instruction to the wire controller, and the wire controller controls the connection and disconnection of the second branch with the internal power supply. In this case, the control unit starts the defrost mode. Therefore, the device can start normally even in a low temperature environment.

[0062] Embodiment 2:

[0063] like Figure 7 As shown, the detection unit at least includes a sampling resistor R 采 , sampling resistor R 采 One end of the sampling resistor R is electrically connected to the first electrical connection end K1 of the electric control valve assembly. 采 The other end is grounded GND. The electric control valve component 03 and the sampling resistor R 采 The connection end of is electrically connected to the anode of the third reverse high voltage protection diode D3, and the cathode of the third reverse high voltage protection diode D3 is electrically connected to the input end of the control module 02. The cathode of the third reverse high voltage protection diode D3 is electrically connected to the ground to form a voltage stabilizing resistor R 稳. In the embodiment of the present application, if the electric control valve assembly is a solenoid valve, the valve body drive part of the electric control valve assembly is a relay. The first contact of the relay is electrically connected to the main circuit of the two-way selection switch, the first branch is electrically connected to the first power supply V1, the first power supply is an external power supply, and the second branch is electrically connected to the internal power supply V2. When the first branch is turned on and the external power supply is not powered, the valve body drive part does not work; when the first branch is turned on and the external power supply is powered, the valve body drive part works; when the second branch is turned on, the internal power supply is powered, and the control module starts the defrost mode. In the embodiment of the present application, the detection part performs current detection. The power supply end of the detection part 01 and the first electrical connection end K1 of the electric control valve assembly 03 can share the power supply V1, saving a power supply cost. Through analysis, it can be known that when the first branch is connected and the external power supply is not powered, the valve body drive part does not work and the electric control valve assembly is abnormally wired, the sampling current I Q =0, the voltage V at the voltage divider point Q Q =0, so the control unit input terminal gets a low level. When the first branch is connected, the external power supply is not supplied, the valve body drive unit is not working, and the electric control valve assembly is normally connected, the valve body is turned on, then the sampling current Therefore, the voltage at the voltage divider point Q The input end of the control unit 02 obtains a high level. When the first branch is connected and the external power supply is powered, the valve body drive unit works and the equipment operates normally. In the embodiment of the present application, the common power supply can be direct current or alternating current. If the common power supply is alternating current, a third reverse high-voltage protection diode D3 is provided to avoid reverse conduction of the voltage. When the first branch is connected, the external power supply is not powered and the electric control valve assembly is wired normally, a half-wave high level is obtained at the input end of the control unit. When the first branch is connected, the external power supply is not powered and the electric control valve assembly is not wired normally, a low level is obtained at the input end of the control unit. The use of alternating current in the common power supply will cause the voltage input to the input end of the control unit to float, so a stable voltage R is used. 稳 Pulling down can stabilize the voltage at the input port of the control unit. If the common power supply is DC, the first branch is connected, the external power supply is not powered, and the electric control valve assembly is wired normally, the control unit input terminal will get a high level. If the common power supply is DC, the first branch is connected, the external power supply is not powered, and the electric control valve assembly is not wired normally, the control unit input terminal will get a low level. When the second branch is connected, the internal power supply is powered, and the control unit starts the defrost mode.

[0064] To isolate the control power supply and the influence of the AC power used to drive the electric control valve components, such as Figure 8As shown, in the embodiment of the present application, an insulated gate bipolar transistor is electrically connected between the cathode of the third reverse high voltage protection diode D3 and the input end of the control unit, the base of the insulated gate bipolar transistor is electrically connected to the cathode of the third reverse high voltage protection diode, and the collector of the insulated gate bipolar transistor is electrically connected to the collector resistor R c The collector is electrically connected to the second power supply, and the collector is electrically connected to the second power supply V2 to supply power to the basic circuit of the insulated gate bipolar transistor. c The connection is electrically connected to the input terminal of the control unit, a third current limiting resistor R4 is connected between the emitter and the base, and the emitter is grounded. In addition, based on the previous analysis, it can be seen that the electric control valve assembly outputs high level and low level respectively under normal wiring and abnormal wiring conditions, and the base of the insulated gate bipolar transistor is turned on under high voltage conditions and cut off under low voltage conditions. Therefore, when the electric control valve assembly is normally wired, the base of the insulated gate bipolar transistor is turned on, and the collector outputs a PWM square wave signal to the control unit. When the electric control valve assembly is abnormally wired, the base of the insulated gate bipolar transistor is cut off, and the collector outputs a high level to the control unit.

[0065] Another embodiment of the present application provides a method for detecting the operating status of an air conditioning system. Figure 2 As shown, the air conditioning system includes an electric control valve assembly, a control module, a detection module and a first power supply, the electric control valve assembly includes a valve body driving part, the valve body driving part has a first electrical connection end, the first electrical connection end is electrically connected to the detection end of the detection module, the signal detection end of the detection module is electrically connected or signal-connected to the control part, and the first electrical connection end is electrically connected or signal-connected to the control part;

[0066] The detection method includes: when the valve body drive unit is in a power-off state, the first power supply supplies power to the detection module and the valve body drive unit, and the detection end of the detection module performs signal detection on the first electrical connection end; the control module obtains the detection signal detected by the signal detection end of the detection module; the control module determines whether the electric control valve assembly is in a normal wiring state based on the detection signal value.

[0067] It can be seen from the above scheme that in the present application, a method for detecting the operating status of an air conditioner is used. When the valve body drive unit loses power and the first power supply supplies power to the detection unit and the valve body drive unit, the detection end of the detection module performs signal detection on the first electrical connection end, and the control module determines whether the electric control valve assembly is in a normal wiring state according to the detection signal value. In this technical solution, the detection function and the control function are respectively arranged in two modules. In the process of product assembly, delivery or equipment application, in the event of abnormal wiring such as disconnection or disconnection of the electric control valve assembly, faults can be quickly detected and troubleshooted, which reduces the difficulty of troubleshooting.

[0068] In an embodiment of the present application, the detection function and the control function are on two separate modules. In this case, it is possible to consider placing the detection module and the control module in different positions in the air conditioner. For example, the detection module is set in the air conditioner and integrated with the main control module, while the control module is placed in the controller; or the two modules are placed separately in the controller, etc.

[0069] The present application also provides a controller, such as Fig. 9 , including a control module, the control module includes a detection unit and a control unit; the signal detection end of the detection unit is electrically connected to the input end of the control unit; the detection end of the detection unit can be used to be electrically connected to the first electrical connection end of the valve body drive unit, and the second electrical connection end of the valve body drive unit is grounded; the control unit can be used to be electrically connected to the first electrical connection end of the valve body drive unit through the output end; the detection end of the detection unit is electrically connected or signal-connected to the first electrical connection end, and the signal detection end of the detection unit is electrically connected or signal-connected to the control unit; when the valve body drive unit is powered off, the first power supply supplies power to the detection unit and the valve body drive unit, and the detection end of the detection unit performs signal detection on the first electrical connection end of the valve body drive unit; the control unit can be used to obtain the detection signal detected by the signal detection end of the detection unit through the input end; the control unit can be used to determine whether the electric control valve assembly is in a normal wiring state according to the detection signal value. Therefore, the circuit connection and working principle are not repeated here.

[0070] The controller in the embodiment of the present application is installed inside the outdoor unit of the air conditioner and is used to control the coil corresponding to the electric control valve assembly. The magnetic field is generated by receiving the instructions of the controller. The force of this magnetic field will drive the structural parts connected to it. The coordinated work of the coil and the structural parts enables the valve to be accurately switched or adjusted according to the needs of the air conditioning system. The controller also has the function of fault detection and diagnosis of the electric control valve assembly, and can promptly alarm when the electric control valve assembly fails to ensure the safe operation of the system. This intelligent control method not only provides energy efficiency for the air conditioning system, but also extends the service life of the equipment.

[0071] The present application also provides an air conditioning system, such as Fig.10As shown, it includes a prompt mechanism 04, an electric control valve assembly 03, a control module and a first power supply, the control module includes a detection unit 01 and a control unit 02, the electric control valve assembly includes a valve body drive unit, the valve body drive unit has a first electrical connection end, the first electrical connection end is electrically connected to the detection end of the detection unit, the second electrical connection end is grounded, the signal detection end of the detection unit is electrically connected or signal-connected to the input end of the control unit, and the first electrical connection end is also electrically connected or signal-connected to the output end of the control unit; the output end of the control unit is electrically connected to the prompt mechanism; the detection unit can be used when the valve body drive unit is in a power-off state, and the detection unit supplies power to the detection unit and the valve body drive unit through the first power supply, and the first power supply is used to perform signal detection on the first electrical connection end through the detection end; the control unit can be used to detect the detection signal detected by the signal detection end of the detection unit; judge whether the electric control valve assembly is in a normal wiring state according to the detection signal value; the prompt mechanism can be used to give a fault prompt when a fault prompt control signal is obtained.

[0072] In an optimized embodiment of the present application, the detection unit and the control unit are both in the controller, and the others are arranged outside the controller. In another optimized embodiment of the present application, the detection unit is arranged in the controller, and the others are arranged outside the controller. The control module can be the original control module in the air-conditioning system, or it can be a new control unit that is completely external, which is not a limitation here. When the control unit determines that the electric control valve assembly is abnormally wired, the prompt mechanism is controlled by the control unit to give a prompt. The prompt mechanism can be arranged in the controller, or it can be arranged in an air-conditioning system independent of the controller. The prompt mechanism can be a display, such as a display screen, an oscilloscope, etc. It can also be a reminder device such as sound or light, such as a buzzer, an alarm, a warning light, a display light, a flashing light, etc. This is only used as an example and does not constitute a limitation.

[0073] It should be noted that the control unit mentioned in all the above technical solutions of this application can be a small microprocessor or a microprocessor chip, etc.

[0074] The electrical connection in the present application may be a direct connection through a wire, or an indirect connection with other electronic devices in between, which is not limited here.

[0075] The resistor mentioned in all the above technical solutions of this application can be the resistor of an independent electronic device or its equivalent resistor, which is not limited here. For example, the resistor of the electric control valve assembly is the equivalent resistor of the electric control valve assembly, which can be obtained from the product manual or specification.

[0076] The "current limiting" in the current limiting resistor mentioned in all the above technical solutions of this application refers to the role played by the resistor in the circuit. The resistor can be selected from plug-in or chip resistors that can be purchased on the market. In addition, since the sampling resistor R 采 and collector resistor Rc The same situation also exists in the reverse high voltage protection diode, which will not be described here. The "reverse high voltage protection" in the reverse high voltage protection diode mentioned in all the above technical solutions refers to the role played by the diode in the circuit. The diode can be a common diode available on the market.

[0077] The above specific examples are used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A method for detecting the operating status of an air conditioning system, characterized in that: The air conditioning system comprises an electric control valve assembly, a control module and a first power supply (V1), the control module comprises a detection unit and a control unit, the electric control valve assembly comprises a valve body drive unit, the valve body drive unit has a first electrical connection end (K1), the first electrical connection end (K1) is electrically connected to the detection end of the detection unit, the signal detection end of the detection unit is electrically connected or signal-connected to the control unit, and the first electrical connection end (K1) is electrically connected or signal-connected to the control unit; The detection method comprises: When the valve body driving part is powered off, the first power supply (V1) supplies power to the detection part and the valve body driving part, the detection end of the detection part performs signal detection on the first electrical connection end; the control part obtains the detection signal detected by the signal detection end of the detection part; The control unit determines whether the electric control valve assembly is in a normal wiring state according to the detection signal value.

2. The method for detecting the operating status of an air conditioning system according to claim 1, characterized in that: When the first electrical connection terminal (K1) is electrically connected to alternating current, a first reverse high-voltage protection diode (D1) is electrically connected between the first electrical connection terminal (K1) and the detection terminal of the detection unit (01), and the cathode of the first reverse high-voltage protection diode (D1) is electrically connected to the first electrical connection terminal (K1), and the anode of the first reverse high-voltage protection diode (D1) is electrically connected to the detection terminal of the detection unit (01).

3. The method for detecting the operating status of an air conditioning system according to claim 1 or 2, characterized in that: The valve body driving part also includes a second connection end (K2), and the second connection end (K2) is grounded; the power supply end of the detection part is electrically connected to the first power supply (V1), and the detection part (01) includes a voltage dividing resistor (R1); the first end of the voltage dividing resistor (R1) is electrically connected to the first power supply (V1); the second end of the voltage dividing resistor (R1) is electrically connected to the first electrical connection end (K1) of the valve body driving part and the input end of the control part (02), respectively, and the position where the voltage dividing resistor (R1) is electrically connected to the first electrical connection end (K1) of the valve body driving part is the voltage dividing point Q.

4. The method for detecting the operating status of an air conditioning system according to claim 3, characterized in that: A first current limiting resistor (R2) is electrically connected between the voltage dividing point Q and the input end of the control unit (02).

5. The method for detecting the operating status of an air conditioning system according to claim 4, characterized in that: An insulated gate bipolar transistor is electrically connected between the first current limiting resistor (R2) and the input end of the control unit (02), the collector of the insulated gate bipolar transistor is electrically connected to the collector resistor (Rc), and the collector is electrically connected to the second power supply (V2), the connection between the collector and the collector resistor (Rc) is electrically connected to the input end of the control unit, the second current limiting resistor (R3) is electrically connected between the emitter and the base, and the emitter is grounded.

6. The method for detecting the operating status of an air conditioning system according to claim 4 or 5, characterized in that: When the first power supply (V1) is electrically connected to alternating current, a second reverse high-voltage protection diode (D2) is electrically connected between the input end of the control unit (02) and the first current limiting resistor (R2), and the anode of the second reverse high-voltage protection diode (D2) is electrically connected to the first current limiting resistor (R2), and the cathode of the second reverse high-voltage protection diode (D2) is electrically connected to the input end of the control unit (02).

7. The method for detecting the operating status of an air conditioning system according to claim 6, characterized in that: The electric control valve assembly also includes a two-way selection switch; the first electrical connection end (K1) of the electric control valve assembly is electrically connected to the main circuit of the two-way selection switch, the first branch of the two-way selection switch is electrically connected to the first power supply (V1), the first power supply (V1) is an external power supply, and the second branch is electrically connected to the internal power supply (V4); when the first branch is connected and the first power supply (V1) is not powered, the valve body drive unit does not work; when the first branch is connected and the first power supply (V1) is powered, the valve body drive unit works; when the second branch is connected and the internal power supply is powered, the control unit starts the defrost mode.

8. The method for detecting the operating status of an air conditioning system according to claim 1 or 2, characterized in that: The detection unit (01) at least includes a sampling resistor (R 采 ), the sampling resistor (R 采 ) is electrically connected to the first electrical connection end (K1) of the valve body driving part, and the sampling resistor (R 采 ) is grounded (GND); the first electrical connection end (K1) of the valve body driving part is connected to the sampling resistor (R 采 ) is electrically connected to the anode of the third reverse high-voltage protection diode (D3), the cathode of the third reverse high-voltage protection diode (D3) is electrically connected to the input end of the control unit (02), and a voltage-stabilizing resistor (R 稳 ), the first power supply (V1) is a valve body drive unit and a sampling resistor (R 采 )powered by.

9. The method for detecting the operating status of an air conditioning system according to claim 8, characterized in that: The electric control valve assembly at least comprises a two-way selection switch, wherein the first electrical connection end (K1) of the electric control valve assembly is electrically connected to the main circuit of the two-way selection switch, the first branch of the two-way selection switch is electrically connected to a first power supply (V1), the first power supply (V1) is an external power supply, and the second branch is electrically connected to an internal power supply (V4); when the first branch is connected and the external power supply is not powered, the valve body drive unit does not work; when the first branch is connected and the external power supply is powered, the valve body drive unit works; When the second branch is connected and the internal power supply is supplied, the control unit starts the defrost mode.

10. The method for detecting the operating status of an air conditioning system according to claim 8, characterized in that: An insulated gate bipolar transistor is electrically connected between the cathode of the third reverse high-voltage protection diode (D3) and the input end of the control unit (02), the base of the insulated gate bipolar transistor is electrically connected to the cathode of the third reverse high-voltage protection diode (D3), the collector of the insulated gate bipolar transistor is electrically connected to the collector resistor (Rc), and the collector is electrically connected to the second power supply (V2), the connection between the collector and the collector resistor (Rc) is electrically connected to the input end of the control unit (02), the emitter and the base of the insulated gate bipolar transistor are connected to a third current limiting resistor (R4), and the emitter is grounded.

11. A method for detecting the operating status of an air conditioning system, characterized in that: The air conditioning system comprises an electric control valve assembly, a control module, a detection module and a first power supply (V1), the electric control valve assembly comprises a valve body drive unit, the valve body drive unit has a first electrical connection end (K1), the first electrical connection end (K1) is electrically connected to the detection end of the detection module, the signal detection end of the detection module is electrically connected or signal-connected to the control unit, and the first electrical connection end (K1) is electrically connected or signal-connected to the control unit; The detection method comprises: When the valve body drive unit is powered off, the first power supply (V1) supplies power to the detection module and the valve body drive unit, and the detection end of the detection module performs signal detection on the first electrical connection end; The control module obtains a detection signal detected by a signal detection end of the detection module; The control module determines whether the electric control valve assembly is in a normal wiring state according to the detection signal value.

12. A controller, characterized in that: It includes a control module, which includes at least a detection unit and a control unit; the signal detection end of the detection unit is electrically connected to the input end of the control unit; the detection end of the detection unit can be used to be electrically connected to the first electrical connection end of the valve body drive unit; the control unit can be used to be electrically connected to the first electrical connection end of the valve body drive unit; the detection end of the detection unit is electrically connected or signal-connected to the first electrical connection end, and the signal detection end of the detection unit is electrically connected or signal-connected to the control unit; when the valve body drive unit is powered off, the first power supply supplies power to the detection unit and the valve body drive unit, and the detection end of the detection unit performs signal detection on the first electrical connection end of the valve body drive unit; the control unit can be used to obtain the detection signal detected by the signal detection end of the detection unit; the control unit can be used to determine whether the electric control valve assembly is in a normal wiring state based on the detection signal value.

13. An air conditioning system, comprising a prompting mechanism (04), an electric control valve assembly (03), a control module and a first power supply (V1), characterized in that: The control module at least comprises a detection unit and a control unit, the electric control valve assembly at least comprises a valve body driving unit, the valve body driving unit has a first electrical connection end (K1), the first electrical connection end (K1) is electrically connected to the detection end of the detection unit, the signal detection end of the detection unit is electrically connected or signal-connected to the input end of the control unit, the first electrical connection end (K1) is also electrically connected or signal-connected to the output end of the control unit; the output end of the control unit is electrically connected to the prompt mechanism; The detection part can be used when the valve body drive part is in a power-off state, and the first power supply (V1) supplies power to the detection part and the valve body drive part, and the detection end performs signal detection on the first electrical connection end; The control unit can be used to detect the detection signal detected by the signal detection end of the detection unit; and judge whether the electric control valve assembly is in a normal wiring state according to the detection signal value; The prompting mechanism can be used to provide a fault prompt when a control signal for a fault prompt is received.

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