Air conditioner
By designing the door card signal detection and enhancement ports of the power conversion module and controller in the air conditioner, accurately detecting the door card status and controlling the operation of the air conditioner, the induction interference problem and energy consumption increase of existing air conditioners when detecting the door card status is solved, and more flexible operating state control, higher detection accuracy and lower power consumption are achieved.
Patent Information
- Application Number
- CN202411676096.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-05-27
AI Technical Summary
Existing air conditioners are susceptible to the influence of induced interference voltage when detecting the door card state, resulting in controller detection errors. Although commonly used methods enhance anti-interference capabilities, they increase energy consumption.
An air conditioner is designed to provide DC power to the controller through the power conversion module. The controller connects to the door card signal detection module through the door card signal detection port and the door card signal enhancement port, and outputs high and low level signals to control the operating status of the door card signal detection module, thereby accurately detecting the insertion or removal status of the door card, and controlling the operation of the air conditioner according to the status.
It improves the flexibility of air conditioner operating status control, enhances the accuracy of door card status detection, while reducing power consumption and improving anti-interference ability.
Smart Images
Figure CN120044623A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of air conditioners, and more particularly to an air conditioner. Background Art
[0002] In the process of improving the use experience of air conditioners in hotel or apartment guest rooms, in order to ensure that the air conditioner can be intelligently controlled to turn on and off according to the actual occupancy status of the user (i.e., whether the door card is inserted), the air conditioner is usually installed near the bed where the user rests, and the door card is installed beside the door for the user to insert or remove conveniently when entering or leaving, so that the distance between the air conditioner and the door is relatively far, and the two need to be connected by a long connecting wire, but this will increase the risk of induced interference voltage and affect the detection of the controller. At present, the method of increasing the current and detection power of the detection circuit is usually adopted to solve the above problems, for example, by reducing the resistance value. Although this enhances the anti-interference ability, it also increases the energy consumption. Summary of the Invention
[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. For this purpose, the object of the present invention is to provide an air conditioner.
[0004] An air conditioner provided by the present invention includes: A power conversion module, connected to an AC power supply, for converting the alternating current output by the AC power supply into direct current suitable for powering the controller; A door card signal detection module, connected to a door card insertion device, for detecting whether the door card is inserted into or removed from the door card insertion device, and outputting a corresponding first door card status detection signal, where the first door card status detection signal includes a door card insertion signal or a door card removal signal; The controller includes a power supply port, a door card signal detection port, and a door card signal enhancement port; The controller is connected to the power conversion module through the power supply port to receive the direct current through the power supply port; The door card signal detection port and the door card signal enhancement port are respectively connected to the door card signal detection module. The controller receives the first door card status detection signal through the door card signal detection port, and after receiving the first door card status detection signal, outputs a high-level signal or a low-level signal to the door card signal detection module through the door card signal enhancement port to control the operating state of the door card signal detection module, and receives a second door card status detection signal output after the operating state of the door card signal detection module changes through the door card signal detection port, and determines the status of the door card based on the second door card status detection signal, and controls the operating state of the air conditioner based on the status of the door card, where the status of the door card includes being inserted into the door card insertion device or removed from the door card insertion device.
[0005] In addition, the air conditioner according to the embodiment of the present invention may further have the following additional technical features: Further, when the voltage value corresponding to the second door card status detection signal is higher than the first voltage threshold pre-stored therein, the controller determines that the status of the door card is inserted into the door card insertion device, and controls the air conditioner to start running; when the voltage value corresponding to the second door card status detection signal is lower than the second voltage threshold pre-stored therein, the controller determines that the status of the door card is removed from the door card insertion device, and controls the air conditioner to stop running and enter the standby state, where the first voltage threshold is greater than the second voltage threshold.
[0006] The above technical solution has the following advantages or beneficial effects: It can determine the status of the door card according to the comparison result of the voltage value corresponding to the second door card status detection signal with the first voltage threshold or the second voltage threshold, and control the operating status of the air conditioner according to the status of the door card, thereby improving the flexibility of controlling the operating status of the air conditioner.
[0007] Further, the door card signal detection module includes: a door card signal detection unit, configured to detect whether the door card is inserted into or removed from the door card insertion device, and output a first voltage signal for indicating that the door card is inserted or a second voltage signal for indicating that the door card is removed; a signal processing unit, connected to the door card signal detection unit, configured to process the first voltage signal and output the door card insertion signal, or process the second voltage signal and output the door card removal signal.
[0008] The above technical solution has the following advantages or beneficial effects: It can provide accurate voltage signals for the signal processing unit according to the first voltage signal or the second voltage signal, and output corresponding processed signals based on these voltage signals, thereby improving the accuracy of the signals obtained by the controller and thus improving the accuracy of door card status detection.
[0009] Further, the door card signal detection unit includes: a connection terminal, the first pin of the connection terminal is connected to a preset DC power supply, and the first pin is also connected to one end of a first switch; the first switch, the other end of the first switch is connected to the second pin of the connection terminal, and the second pin is also connected to the signal processing unit; wherein, when the door card is inserted into the door card insertion device, the first switch is turned on, and the second pin outputs the first voltage signal; when the door card is removed from the door card insertion device, the first switch is turned off, and the second pin outputs the second voltage signal, and the voltage value of the first voltage signal is greater than the voltage value of the second voltage signal.
[0010] The above technical solution has the following advantages or beneficial effects: According to the state of the access card inserted into or taken out of the access card device, the on / off of the first switch can be accurately controlled. According to the on / off of the first switch, the on / off of the preset DC power supply and the second pin is realized, and then an accurate first voltage signal or second voltage signal is output through the second pin, so as to determine the inserted or taken out state of the access card according to the first voltage signal or the second voltage signal, improving the accuracy of determining the access card state.
[0011] Further, the signal processing unit includes: a triode, one end of the base of the triode is connected to one end of the first resistor, one end of the collector of the triode is connected to one end of the second resistor, the emitter of the triode is grounded, and the controller controls the on / off state of the triode by outputting a high-level signal or a low-level signal through the access card signal enhancement port, and further controls the operating state of the access card signal detection module; the first resistor, the other end of the first resistor is connected to the access card signal enhancement port; the second resistor, the other end of the second resistor is connected to the second pin.
[0012] The above technical solution has the following advantages or beneficial effects: The operating state of the access card signal detection module is flexibly controlled by the high-level signal or low-level signal output through the access card signal enhancement port, thereby improving the accuracy of access card state detection.
[0013] Further, the signal processing unit includes: a third resistor, one end of the third resistor is connected between the first resistor and the base of the triode, and the other end of the third resistor is grounded; a fourth resistor, one end of the fourth resistor is connected to the second pin, and the other end of the fourth resistor is grounded.
[0014] The above technical solution has the following advantages or beneficial effects: Through the third resistor and the fourth resistor, the anti-interference ability and stability of the entire circuit can be improved.
[0015] Further, the signal processing unit further includes: a fifth resistor, one end of the fifth resistor is connected to one end of the sixth resistor, and the other end of the fifth resistor is grounded; the sixth resistor, the other end of the sixth resistor is connected to the second pin.
[0016] The above technical solution has the following advantages or beneficial effects: When the inserted or taken out state of the access card changes, the voltage values corresponding to different voltage signals can be obtained according to the voltage division effect of the fifth resistor and the sixth resistor, and then the state of the access card can be determined according to these voltage values, improving the accuracy of access card state detection.
[0017] Further, the access card signal detection port is connected between the fifth resistor and the sixth resistor.
[0018] The above technical solution has the following advantages or beneficial effects: It can accurately obtain the voltage values corresponding to the first door card status detection signal and the second door card status detection signal according to the voltage division effect of the fifth resistor and the sixth resistor, and determine the status of the door card based on these voltage values, improving the accuracy of door card status detection.
[0019] Further, the controller is configured to: when outputting a high-level signal through the door card signal enhancement port, control the triode to be in the conducting state; when outputting a low-level signal through the door card signal enhancement port, control the triode to be in the cut-off state.
[0020] The above technical solution has the following advantages or beneficial effects: It can accurately control the on-off state of the triode according to the high-level signal or low-level signal output by the door card signal enhancement port, realize the detection of the door card status, and at the same time achieve the reduction of power consumption and the improvement of anti-interference ability.
[0021] Further, the controller is further configured to: after determining the status of the door card based on the second door card status detection signal, control the triode to be in the cut-off state.
[0022] The above technical solution has the following advantages or beneficial effects: After determining the status of the door card according to the second door card status detection signal, by controlling the triode to be in the cut-off state, the power consumption can be reduced.
[0023] According to the air conditioner of the embodiment of the present invention, through the power supply port of the controller, the power conversion module can provide a certain amount of direct current for the controller. The door card signal detection port and the door card signal enhancement port of the controller are respectively connected to the door card signal detection module. When the door card signal detection module outputs the first door card status detection signal, the door card signal detection port will receive this first door card status detection signal. At the same time, the controller will output a high-level signal or a low-level signal through the door card signal enhancement port to control the operating state of the door card signal detection module, so as to obtain the second door card status detection signal output after the change of the operating state of the door card signal detection module again through the door card signal detection port, and determine the status of the door card according to the second door card status detection signal, that is, determine whether the door card is inserted into the device or taken out of the device, and thus control the operating state of the air conditioner according to the status of the door card. It can not only improve the anti-interference ability and reduce the power consumption, but also improve the accuracy of door card status detection.
[0024] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of embodiments in conjunction with the accompanying drawings, where: Figure 1 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention; Figure 2 is a schematic structural diagram of a controller according to an embodiment of the present invention; Figure 3 is a schematic structural diagram of an air conditioner according to another embodiment of the present invention; Figure 4 is a schematic connection diagram of each module in an air conditioner according to an embodiment of the present invention; Figure 5 is a schematic structural diagram of a door card signal detection module according to an embodiment of the present invention; Figure 6 is a schematic circuit diagram of an air conditioner according to an embodiment of the present invention. Detailed Embodiments
[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0027] In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present invention.
[0028] 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, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.
[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.
[0030] An embodiment of the present invention provides an air conditioner 10. Referring to Figure 1 , the air conditioner 10 includes a refrigeration system for exchanging heat with indoor air to meet the refrigeration or heating requirements.
[0031] The refrigeration system includes a compressor, a condenser, an electronic expansion valve, and an evaporator. In the present invention, the air conditioner 10 performs a refrigeration cycle by using the compressor, the condenser, the electronic expansion valve, and the evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the conditioned and heat-exchanged air.
[0032] The compressor compresses the refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.
[0033] The electronic expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the electronic expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor.
[0034] The evaporator can achieve a refrigeration effect by exchanging heat with the material to be cooled by using the latent heat of evaporation of the refrigerant. Throughout the cycle, the air conditioner 10 can adjust the temperature of the indoor space.
[0035] The outdoor unit 2 of the air conditioner 10 refers to the part of the refrigeration cycle including the compressor and the outdoor heat exchanger. The indoor unit 1 of the air conditioner 10 includes an indoor heat exchanger, and the electronic expansion valve can be provided in the indoor unit 1 or the outdoor unit 2.
[0036] The indoor heat exchanger and the outdoor heat exchanger serve as condensers or evaporators. When the indoor heat exchanger serves as a condenser, the air conditioner 10 serves as a heater in the heating mode. When the indoor heat exchanger serves as an evaporator, the air conditioner 10 serves as a cooler in the cooling mode.
[0037] The air conditioner 10 in the present invention includes an indoor unit 1 and an outdoor unit 2. The indoor unit 1 and the outdoor unit 2 can be set as an integrated unit or a split unit. The indoor unit 1 can be set as a wall-mounted unit, a ceiling unit, a duct unit, etc., and the indoor unit 1 is installed on the top or upper part of the indoor room.
[0038] Referring Figure 1 , taking the indoor wall-mounted unit as an example, the indoor wall-mounted unit is usually installed at positions such as the indoor wall surface. Again, for example, an indoor cabinet (not shown in the figure) is also a form of the indoor unit 1 of the indoor unit 1.
[0039] Taking the split unit as an example, the air conditioner 10 includes an indoor unit 1 and an outdoor unit 2. Among them, the outdoor unit 2 is usually set outdoors and is used for heat exchange with the indoor environment.
[0040] In addition, as shown in the figure, the air conditioner 10 is equipped with a controller 71 to control the operation of each component in the internal air conditioner 10, so that each component of the air conditioner 10 operates to realize each predetermined function of the air conditioner 10. Among them, a control device 200 is also attached to the air conditioner 10. Exemplarily, the control device 200 is specifically set as a remote controller, and the remote controller has a function of communicating with the controller 71 using, for example, infrared rays or other communication methods. The remote controller is used for various controls of the air conditioner 10 by the user to realize the interaction between the user and the air conditioner 10.
[0041] The indoor unit 1 of the air conditioner 10 in the embodiment of the present invention is set on the top or upper part of the room. Generally speaking, the installation height of the indoor unit 1 is higher than the user's activity area. The indoor unit 1 includes an air return opening and an air outlet communicating with the room. The indoor air passes through the air return opening into the indoor unit 1 and flows back into the room through the air outlet.
[0042] The refrigerant circulation circuit in the present invention circulates the refrigerant in a circuit composed of a compressor, a condenser, an electronic expansion valve, and an evaporator. One of the condenser and the evaporator is an outdoor heat exchanger, and the other is an indoor heat exchanger. The indoor heat exchanger is used for heat exchange with the air in the indoor unit 1, and the outdoor unit 2 heat exchanger is used for heat exchange with the air in the outdoor unit 2, so as to realize the cooling or heating requirements of the air conditioner 10.
[0043] The indoor unit 1 also includes an indoor fan. The indoor fan is arranged near the air return opening or the air outlet of the indoor heat exchanger and is used to send the heat-exchanged air to the room. The indoor fan includes multiple gears and is used to change the air outlet speed of the air flow at the air outlet.
[0044] An air deflector is arranged at the position of the air outlet. By changing the relative rotation angle between it and the air outlet, the air outlet direction of the air flowing through the air outlet is adjusted, thereby affecting the air temperature stratification in the room.
[0045] In the embodiment shown in the present invention, the air conditioner 10 further includes a controller 71. The controller 71 refers to a device that can generate operation control signals according to instruction operation codes and timing signals to instruct the air conditioner 10 to execute control instructions. For example, in response to the power-on or power-off instruction issued by the user received, the controller 71 can execute operations related to the object selected by the power-on or power-off instruction.
[0046] The embodiment of the present invention also provides a schematic diagram of the hardware structure of the controller 71, as Figure 2 shown. The controller 71 includes a processor 83. Optionally, it further includes a memory 82 and a communication interface 84 connected to the processor 83. The processor 83, the memory 82, and the communication interface 84 are connected through a bus 81.
[0047] The processor 83 can be a central processing unit 83 (CPU), a general-purpose processor 83, a network processor 83 (NP), a digital signal processor 83 (DSP), a microprocessor 83, a microcontroller 718, a programmable logic device (PLD), or any combination thereof. The processor 83 can also be any other device with processing functions, such as a circuit, a device, or a software module. The processor 83 can also include multiple CPUs, and the processor 83 can be a single-core (single-CPU) processor 83 or a multi-core (multi-CPU) processor 83. Here, the processor 83 can refer to one or more devices, circuits, or processing cores for processing data (such as computer program instructions).
[0048] The memory 82 can be a read-only memory (ROM), or other types of static storage devices that can store static information and instructions, a random access memory (RAM), or other types of dynamic storage devices that can store information and instructions. It can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM), or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media, or other magnetic storage devices, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer. The embodiments of the present invention do not impose any restrictions on this. The memory 82 can exist independently or be integrated with the processor 83. Among them, the memory 82 can contain computer program code. The processor 83 is used to execute the computer program code stored in the memory 82, thereby implementing the control method of the air conditioner provided by the embodiments of the present invention.
[0049] The communication interface 84 can be used to communicate with other devices or communication networks (such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc.). The communication interface 84 can be a module, a circuit, a transceiver, or any device capable of implementing communication.
[0050] The bus 81 can be a peripheral component interconnect (PCI) bus 81 or an extended industry standard architecture (EISA) bus 81, etc. The bus 81 can be divided into an address bus 81, a data bus 81, a control bus 81, etc. For the sake of representation, Figure 2 only a thick line is used to represent it in the figure, but it does not mean that there is only one bus 81 or one type of bus 81.
[0051] The following refers to Figures 3 - 6 describe the air conditioner according to the embodiments of the present invention.
[0052] Figure 3 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention. As Figure 3As shown in the figure, an air conditioner 10 includes: a power conversion module 11, a door card signal detection module 12, and a controller 71.
[0053] Among them, as Figure 4 shown, the power conversion module 11 is connected to an AC power supply and is used to convert the AC power output by the AC power supply into DC power suitable for powering the controller 71; the door card signal detection module 12 is connected to a door card insertion device and is used to detect whether a door card is inserted into or removed from the door card insertion device, and output a corresponding first door card status detection signal, where the first door card status detection signal includes a door card insertion signal or a door card removal signal.
[0054] The controller 71 includes a power supply port, a door card signal detection port, and a door card signal enhancement port; the controller 71 is connected to the power conversion module 11 through the power supply port to receive DC power through the power supply port; the door card signal detection port and the door card signal enhancement port are respectively connected to the door card signal detection module. The controller receives the first door card status detection signal through the door card signal detection port, and after receiving the first door card status detection signal, outputs a high-level signal or a low-level signal to the door card signal detection module through the door card signal enhancement port to control the operating state of the door card signal detection module, and receives the second door card status detection signal output after the operating state of the door card signal detection module changes through the door card signal detection port, and determines the status of the door card based on the second door card status detection signal, and controls the operating state of the air conditioner based on the status of the door card, where the status of the door card includes inserting the door card into the door card insertion device or removing the door card from the door card insertion device.
[0055] In an embodiment, as Figure 4 shown, the power conversion module 11 is connected to an AC power supply and can convert the high-voltage AC power output by the AC power supply into low-voltage DC power suitable for powering the controller 71. For example, when the AC power supply outputs 220V high-voltage AC power, after passing through the power conversion module 11, the power conversion module 11 can convert the 220V high-voltage AC power into 5V or 12V low-voltage DC power to convert it into low-voltage DC power suitable for powering the controller 71, ensuring that the controller 71 can operate stably, avoiding damage to the controller 71 by high-voltage electricity, and ensuring that the controller 71 can obtain continuous and reliable power supply.
[0056] The door card signal detection module 12 is connected to the door card insertion device and can issue a first door card status detection signal according to the door card insertion or removal status of the door card insertion device, that is, it can issue a door card insertion signal when the door card is inserted into the door card insertion device, and issue a door card removal signal when the door card is removed from the door card insertion device.
[0057] The power supply port of the controller 71 is connected to the power conversion module 11 and can receive the direct current output by the power conversion module 11, such as 5V or 12V, to supply power to the controller 71. In addition, the door card signal detection port and the door card signal enhancement port of the controller 71 are respectively connected to the door card signal detection module 12. When the door card signal detection module 12 outputs a first door card status detection signal according to the insertion or removal status of the door card inserted into the device, the door card signal detection module will receive this first door card status detection signal. After receiving this first door card status detection signal, the controller 71 outputs a high-level signal or a low-level signal to the door card signal detection module 12 through the door card signal enhancement port to control the operating state of the door card signal detection module 12. After the operating state of the door card signal detection module 12 changes, a second door card status detection signal is output to determine the status of the door card again, and the operating state of the air conditioner 71 is controlled based on the second door card status detection signal. For example, if it is determined based on the second door card status detection signal that the status of the door card is inserted into the device, the air conditioner 10 is controlled to start running; if it is determined based on the second door card status detection signal that the status of the door card is removed from the device, the air conditioner 10 is controlled to stop running, which can avoid misjudgment of the status of the door card caused by interference signals, improve the accuracy of the status detection of the door card. At the same time, by controlling the operating state of the door card signal detection module 12, the resistance to external interference signals can be enhanced, achieving the purpose of reducing energy consumption.
[0058] In an embodiment of the present invention, when the voltage value corresponding to the second door card status detection signal is higher than the first voltage threshold pre-stored therein, the controller 71 determines that the status of the door card is inserted into the device and controls the air conditioner 10 to start running; when the voltage value corresponding to the second door card status detection signal is lower than the second voltage threshold pre-stored therein, the controller 71 determines that the status of the door card is removed from the device and controls the air conditioner 10 to stop running and enter the standby state, where the first voltage threshold is greater than the second voltage threshold.
[0059] In the embodiment, after the second door card status detection signal is detected at the door card signal detection port, if the voltage value corresponding to the second door card status detection signal is higher than the first voltage threshold pre-stored therein, for example, the first voltage threshold is 4V, it is determined that the status of the door card is inserted into the device. Based on this judgment result, the controller 71 will control the air conditioner 10 to start running; if the voltage value corresponding to the second door card status detection signal is lower than the second voltage threshold pre-stored therein, for example, the second voltage threshold is 1V, it is determined that the status of the door card is removed from the device. Based on this judgment result, the controller 71 will control the air conditioner 10 to stop running and enter the standby state. In this way, the controller 71 can control the operation of the air conditioner 10 according to the insertion or removal status of the door card inserted into the device, thereby improving the flexibility of controlling the operating state of the air conditioner 10.
[0060] Among them, voltage thresholds for determining the status of the access card (i.e., the first voltage threshold and the second voltage threshold) have been preset inside the controller 71, and the controller 71 has the function of comparing these voltage thresholds. That is, the controller can select the corresponding voltage threshold for comparison based on the voltage value corresponding to the second access card status detection signal, and based on the comparison result, accurately determine the insertion or removal status of the access card, and then control the operation or standby of the air conditioner 10. It should be noted that the controller 71 generally has a numerical comparison function, such as voltage value comparison. For example, MCUs, single-chip microcomputers, etc. all have numerical comparison functions such as voltage comparison. This belongs to the prior art. Therefore, the embodiments of the present invention only adopt the conventional functions of the controller 71 and do not involve the improvement of the internal functions of the controller 71. Instead, the existing functions of the controller 71 are used to realize the linkage between the status detection of the access card and the control of the air conditioner 10.
[0061] In an embodiment of the present invention, as Figure 5 shown, the access card signal detection module 12 includes: an access card signal detection unit 121 and a signal processing unit 122. Among them, the access card signal detection unit 121 is used to detect whether the access card is inserted into or removed from the access card insertion device, and output a first voltage signal for indicating the insertion of the access card or a second voltage signal for indicating the removal of the access card; the signal processing unit 122 is connected to the access card signal detection unit 121 and is used to process the first voltage signal to output an access card insertion signal, or process the second voltage signal to output an access card removal signal.
[0062] In the embodiment, the access card signal detection unit 121 is used to detect the insertion or removal status of the access card, determine whether the access card is inserted into or removed from the access card insertion device, and output a corresponding voltage signal according to this judgment result.
[0063] Specifically, when the access card is inserted into the access card insertion device, the access card signal detection unit 121 will output a first voltage signal, and then this first voltage signal is transmitted to the signal processing unit 122. After receiving the first voltage signal, the signal processing unit 122 will process the first voltage signal to output an access card insertion signal that can be recognized by the controller 71.
[0064] Similarly, when the access card is inserted into the device, the access card signal detection unit 121 will output a second voltage signal and transmit the second voltage signal to the signal processing unit 122. After receiving the second voltage signal, the signal processing unit 122 processes the second voltage signal and outputs an access card removal signal that can be recognized by the controller 71. In this way, in the access card signal detection unit 121, the detection of the access card state and the conversion of the signal are completed, thereby providing an accurate voltage control signal for the controller 71, and further improving the accuracy of the access card state detection and the accuracy of the control of the air conditioner 10.
[0065] In an embodiment of the present invention, as Figure 6 shown, the access card signal detection unit 121 includes: a connection terminal X1 and a first switch K1. Among them, the first pin 1 of the connection terminal K1 is connected to a preset DC power supply, and the first pin 1 is also connected to one end of the first switch K1; the other end of the first switch K1 is connected to the second pin 2 of the connection terminal X1, and the second pin 2 is also connected to the signal processing unit 122.
[0066] Among them, when the access card is inserted into the access card insertion device, the first switch K1 is turned on, and the second pin 2 outputs a first voltage signal; when the access card is removed from the access card insertion device, the first switch K1 is turned off, and the second pin 2 outputs a second voltage signal, and the voltage value of the first voltage signal is greater than the voltage value of the second voltage signal.
[0067] Specifically, as Figure 6 shown, the first pin 1 of the connection terminal X1 is connected to a preset DC power supply, and the first pin 1 is also connected to one end of the first switch K1, while the other end of the first switch K1 is connected to the second pin 2 of the connection terminal X1 and is also connected to the signal processing unit 122 through the second pin 2, that is, the preset DC power supply is connected to the first switch K1 through the first pin 1 of the connection terminal X1, and the first switch K1 is connected to the signal processing unit 122 through the second pin 2 of the connection terminal X1.
[0068] Therefore, when the access card is inserted into the access card insertion device, the first switch K1 is in a conductive state, and the preset DC power supply can be connected together through the first pin 1 and the second pin 2 of the connection terminal X1 and output a first voltage signal through the second pin 2. The first voltage signal is a high-level signal. For example, when the preset DC power supply is 12V, when the first switch K1 is turned on, the preset DC power supply will form a path through the first pin 1 and the second pin 2 of the connection terminal X1, so that the second pin 2 can output a high-level first voltage signal, and the voltage value corresponding to the first voltage signal can reach 12V.
[0069] When the access card is taken out and inserted into the device, the first switch K1 is turned off, and the preset DC power supply cannot connect the first pin 1 to the second pin 2, resulting in the second voltage signal output by the second pin 2 becoming a low-level signal, and the second level signal is, for example, 0V. Thus, the insertion or removal state of the access card can be accurately judged according to the voltage signal output by the second pin 2.
[0070] In an embodiment of the present invention, as Figure 6 shown, the signal processing unit 122 includes: a triode V1, a first resistor R1, and a second resistor R2. Among them, the base B of the triode V1 is connected to one end of the first resistor R1, the collector C of the triode V1 is connected to one end of the second resistor R2, the emitter E of the triode V1 is grounded, and the controller 71 controls the on-off state of the triode V1 by outputting a high-level signal or a low-level signal through the access card signal enhancement port, and further controls the operating state of the access card signal detection module 12; the other end of the first resistor R1 is connected to the access card signal enhancement port; the other end of the second resistor R2 is connected to the second pin 2.
[0071] In the embodiment, as Figure 6 shown, the base B of the triode V1 is connected to the access card signal enhancement port of the controller 71 through the first resistor R1. Then, the controller 71 can send a high-level signal or a low-level signal to the triode V1 through the access card signal enhancement port to control the on-off state of the triode V1. That is, when the triode V1 is turned on, a path is formed between the collector C and the emitter E of the triode V1, and at this time, current can flow through; when the triode V1 is turned off, the connection between the collector C and the emitter E of the triode V1 is disconnected, and current cannot flow through.
[0072] The collector C of the triode V1 is also connected to the second pin 2 through the second resistor R2. At the same time, the emitter E of the triode V1 is grounded, which can ensure the stability and reliability of the circuit. In this way, the controller 71 can flexibly control the operating state of the access card signal detection module 12 by simply changing the output level of the access card signal enhancement port, and further improve the accuracy of access card state detection.
[0073] In an embodiment of the present invention, as Figure 6 shown, the signal processing unit 122 includes: a third resistor R3 and a fourth resistor R4. Among them, one end of the third resistor R3 is connected between the first resistor R1 and the base B of the triode V1, and the other end of the third resistor R3 is grounded; one end of the fourth resistor R4 is connected to the second pin 2, and the other end of the fourth resistor R4 is grounded.
[0074] In the embodiment, as Figure 6As shown, one end of the third resistor R3 is connected between the first resistor R1 and the base B of the triode V1, and the other end of the third resistor R3 is grounded. This can provide an additional current path for the circuit, helping to stabilize the voltage at the base B of the triode V1 and preventing the on-off state of the triode V1 from being affected by voltage fluctuations. At the same time, the resistance value of the third resistor R3 can also be adjusted to precisely adjust the on and off states of the triode V1, thereby achieving more precise control of the door card signal detection module 12. At the same time, one end of the fourth resistor R4 is connected to the second pin 2, and the other end is grounded, thereby providing a stable reference potential for the second pin 2 and also helping to absorb possible interference signals, improving the anti-interference ability and stability of the entire circuit.
[0075] In an embodiment of the present invention, as Figure 6 shown, the signal processing unit 122 further includes: a fifth resistor R5 and a sixth resistor R6. Among them, one end of the fifth resistor R5 is connected to one end of the sixth resistor R6, and the other end of the fifth resistor R5 is grounded; the other end of the sixth resistor R6 is connected to the second pin 2.
[0076] In the embodiment, as Figure 6 shown, the fifth resistor R5 and the sixth resistor R6 are connected in series. One end of the fifth resistor R5 is directly connected to one end of the sixth resistor R6, while the other end of the fifth resistor R5 is grounded, and the other end of the sixth resistor R6 is connected to the second pin 2. In this way, through the voltage division effect of the fifth resistor R5 and the sixth resistor R6, the voltage value of the first voltage signal or the second voltage signal can be effectively detected, and the state of the door card can be accurately judged according to the voltage value of the first voltage signal or the second voltage signal.
[0077] In an embodiment of the present invention, as Figure 6 shown, the door card signal detection port is connected between the fifth resistor R5 and the sixth resistor R6.
[0078] In the embodiment, as Figure 6 shown, the door card signal detection port is connected between the fifth resistor R5 and the sixth resistor R6, so as to detect the first voltage signal or the second voltage signal output by the second pin 2 according to the voltage division effect of the fifth resistor R5 and the sixth resistor R6.
[0079] In summary, when the air conditioner 10 is in a normal operation or standby state, the voltage value corresponding to the level signal output by the door card signal detection port is 0V, that is, a low-level signal. Therefore, the voltage value corresponding to the level signal at the base B of the triode V1 is also 0V, resulting in the inability to conduct between the collector C and the emitter E of the triode V1, and the current cannot flow through the second resistor R2, the collector C and the emitter E of the triode V1.
[0080] When the door card is inserted into the door card insertion device, the first switch K1 is turned on. The second pin 2 of the connection terminal X1 is connected to the preset DC power supply through the first pin 1. Then, the voltage value corresponding to the first voltage signal output by the second pin 2 is 12V. At this time, the current flowing from the preset DC power supply through the first switch K1 flows to the ground (i.e., GND) through the loop in which the fourth resistor R4, the fifth resistor R5, and the sixth resistor R6 are connected in series. Among them, the resistance value of the fourth resistor R4 is, for example, 20KΩ. The current flowing through the fourth resistor R4 is: I1 = 12V / R6 = 12V / 20k = 0.6mA. At the same time, the fifth resistor R5 and the sixth resistor R6 generate a voltage division, and the door card signal detection port will obtain this voltage division. For example, the resistance value of the fifth resistor R5 is 10KΩ, and the resistance value of the sixth resistor R6 is 15KΩ. That is, the voltage value obtained by the door card signal detection port is: V1 = 12V*R2 / (R1+R2) = 4.8V, and this voltage value is higher than the first voltage threshold, for example, 4V, that is, V1>4V. It can be preliminarily judged that the state of the door card is inserted into the door card insertion device.
[0081] At the same time, in order to avoid misjudgment caused by interference signals, the controller 71 will output a high-level signal through the door card signal enhancement port. At this time, the voltage value from the base B to the emitter E of the first triode V1 connected to the door card signal enhancement port through the first resistor R1 reaches the first preset voltage threshold, for example, 0.7V, making the collector C and the emitter E of the triode V1 conduct. Then, the current flowing from the preset DC power supply (12V) through the first switch K1 will also flow to the ground through the second resistor R2. The resistance value of the second resistor is, for example, 5KΩ. The current flowing through the second resistor R2 is: I2 = (12V - 0.3V) / R5 = 2.34mA.
[0082] Therefore, the total current flowing through the first switch K1 is the sum of the currents flowing through the fourth resistor R4 and the second resistor R2, that is, I = I1 + I2 = 2.94mA. After the total current increases, it can play a role in improving anti-interference when the first switch K1 is turned on. At this time, the door card signal detection port will receive the second door card state detection signal output after the triode V1 conducts, and determine the state of the door card based on the second door card state detection signal. For example, if the voltage value corresponding to the second door card state signal is also higher than the first voltage threshold, it is determined that the state of the door card is that the door card is inserted into the door card insertion device, and the air conditioner 10 will be controlled to start running.
[0083] When the access card is taken out and inserted into the device, the first switch K1 is turned off, and the preset DC power supply cannot connect the first pin 1 and the second pin 2 of the connection terminal X1 together. The second pin 2 will be grounded through the fourth resistor R4. Therefore, the voltage value corresponding to the second voltage signal output by the second pin 2 is 0V. Then, the signal connected to the access card signal detection port through the sixth resistor R6 is also a low-level signal, and the voltage value corresponding to this low-level signal is also 0V. At this time, the voltage value of the access card signal detection port is lower than the second voltage threshold, for example, 1V, and it can be preliminarily determined that the state of the access card is taken out and inserted into the device.
[0084] At the same time, in order to avoid misjudgment of the access card state caused by interference signals, the controller 71 will also output a high-level signal through the access card signal enhancement port. The voltage value from the base B to the emitter E of the triode V1 reaches 0.7V, making the collector C and the emitter E of the triode V1 conduct. Then, the current flowing from the second pin 2 of the connection terminal X1 through the first switch K1 will also flow to the ground through the second resistor R2. If there are interference signals during this process, the current will also be quickly consumed due to the reduction of the loop impedance, improving the anti-interference ability.
[0085] At this time, the access card signal detection port will also detect the access card state again. According to the second access card state detection signal output after the triode V1 conducts, that is, according to the voltage value corresponding to the second access card state detection signal, the state of the access card is determined. If the voltage value corresponding to the second access card state detection signal is still lower than the second voltage threshold, it will be determined that the state of the access card is taken out and inserted into the device, thereby improving the accuracy of access card state detection.
[0086] In an embodiment of the present invention, the controller 71 is configured to: when outputting a high-level signal through the access card signal enhancement port, control the triode V1 to be in a conducting state; when outputting a low-level signal through the access card signal enhancement port, control the triode V1 to be in a cut-off state.
[0087] In the embodiment, the controller 71 flexibly outputs different level signals through the access card signal enhancement port to control the state of the triode V1. Specifically, when the controller 71 outputs a high-level signal through the access card signal enhancement port, the voltage value from the base B to the emitter E of the triode V1 reaches 0.7V, making the collector C and the emitter E of the triode V1 conduct, so that the triode V1 is in a conducting state; when the controller 71 outputs a low-level signal through the access card signal enhancement port, then the collector C and the emitter E of the triode V1 do not conduct, and no conductive path can be formed, thereby controlling the triode V1 to be in a cut-off state, and then being able to accurately control the on-off state of the triode V1 and realizing the state detection of the access card based on the on-off state of the triode V1.
[0088] In one embodiment of the present invention, the controller 71 is further configured to: after determining the status of the access card based on the second access card status detection signal, control the triode V1 to be in the off state.
[0089] In the embodiment, after determining the status of the access card based on the second access card status signal detection signal, for example, after determining that the status of the access card is that the access card is inserted into the access card device or the access card is taken out of the access card insertion device according to the voltage value corresponding to the second access card status detection signal, a low-level signal will be output through the access card signal enhancement port to control the triode V1 to be in the off state, so that the current will not flow through the second resistor R2, thereby reducing the power consumption.
[0090] Therefore, only after the level signal output by the second pin 2 changes, that is, after the second pin 2 outputs the first voltage signal or the second voltage signal, the triode V1 will be in the on state. After the status detection of the access card is completed, it will immediately be in the off state, thereby improving the anti-interference ability while reducing the power consumption.
[0091] Since the controller 71 controls the conduction of the triode V1 only after the level signal output by the second pin 2 changes, and controls the triode V1 to turn off immediately after the detection is completed, the long-term current when the access card is inserted into the access card insertion device is 0.6 mA, that is, I3 = 12V / R6 = 0.6 mA, and the power consumption is 12V * I3 = 0.0072W, which is much lower than 0.072W, thereby reducing the power consumption.
[0092] According to the air conditioner 10 of the embodiment of the present invention, through the power supply port of the controller 71, the power conversion module 11 can provide a certain amount of direct current for the controller 71. The access card signal detection port and the access card signal enhancement port of the controller 71 are respectively connected to the access card signal detection module 12. When the access card signal detection module 12 outputs the first access card status detection signal, the access card signal detection port will receive the first access card status detection signal. At the same time, the controller 71 will output a high-level signal or a low-level signal through the access card signal enhancement port to control the operating state of the access card signal detection module 12, so as to obtain the second access card status detection signal output after the change of the operating state of the access card signal detection module 12 again through the access card signal detection port, and determine the status of the access card according to the second access card status detection signal, that is, determine whether the status of the access card is inserted into the access card insertion device or taken out of the access card insertion device, so as to flexibly control the operating state of the air conditioner 10 according to the status of the access card, which can not only improve the anti-interference ability and reduce the power consumption, but also improve the accuracy of access card status detection.
[0093] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.
[0094] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.
Claims
1. An air conditioner, characterized in that: include: A power conversion module, connected to the AC power source, and used to convert the AC power output by the AC power source into DC power suitable for powering the controller; a door card signal detection module connected to the door card insertion device, configured to detect whether the door card is inserted into or removed from the door card insertion device, and output a corresponding first door card status detection signal, wherein the first door card status detection signal includes a door card insertion signal or a door card removal signal; The controller includes a power supply port, a door card signal detection port and a door card signal enhancement port; The controller is connected to the power conversion module through the power supply port to receive the direct current through the power supply port; The door card signal detection port and the door card signal enhancement port are respectively connected to the door card signal detection module, the controller receives the first door card status detection signal through the door card signal detection port, and after receiving the first door card status detection signal, outputs a high level signal or a low level signal to the door card signal detection module through the door card signal enhancement port to control the operation state of the door card signal detection module, and receives a second door card status detection signal output after the operation state of the door card signal detection module changes through the door card signal detection port, determines the state of the door card based on the second door card status detection signal, and controls the operation state of the air conditioner based on the state of the door card, wherein the state of the door card includes inserting the door card insertion device or removing the door card insertion device.
2. The air conditioner according to claim 1, characterized in that: When the voltage value corresponding to the second door card state detection signal is higher than the first voltage threshold pre-stored therein, the controller determines that the state of the door card is inserted into the door card insertion device, and controls the air conditioner to start running; When the voltage value corresponding to the second door card status detection signal is lower than the second voltage threshold pre-stored therein, the controller determines that the status of the door card is to remove the door card and insert the device, and controls the air conditioner to stop running and be in standby mode, wherein the first voltage threshold is greater than the second voltage threshold.
3. The air conditioner according to claim 1, characterized in that: The door card signal detection module includes: a door card signal detection unit, used to detect whether a door card is inserted into or removed from the door card insertion device, and output a first voltage signal for indicating that a door card is inserted or a second voltage signal for indicating that a door card is removed; The signal processing unit is connected to the door card signal detection unit, and is used to process the first voltage signal and output the door card insertion signal, or to process the second voltage signal and output the door card removal signal.
4. The air conditioner according to claim 3, characterized in that: The door card signal detection unit comprises: A connecting terminal, wherein a first pin of the connecting terminal is connected to a preset DC power supply, and the first pin is also connected to one end of a first switch; The first switch, the other end of the first switch is connected to the second pin of the connection terminal, and the second pin is also connected to the signal processing unit; Wherein, when the door card is inserted into the door card insertion device, the first switch is turned on, and the second pin outputs the first voltage signal; When the door card is taken out and inserted into the device, the first switch is turned off, the second pin outputs the second voltage signal, and the voltage value of the first voltage signal is greater than the voltage value of the second voltage signal.
5. The air conditioner according to claim 3, characterized in that: The signal processing unit comprises: A transistor, wherein the base of the transistor is connected to one end of the first resistor, the collector of the transistor is connected to one end of the second resistor, and the emitter of the transistor is grounded, and the controller outputs a high level signal or a low level signal through the door card signal enhancement port to control the on-off state of the transistor, thereby controlling the operating state of the door card signal detection module; The first resistor, the other end of the first resistor is connected to the door card signal enhancement port; The second resistor, the other end of the second resistor is connected to the second pin.
6. The air conditioner according to claim 5, characterized in that: The signal processing unit comprises: A third resistor, one end of the third resistor is connected between the first resistor and the base of the transistor, and the other end of the third resistor is grounded; A fourth resistor, one end of the fourth resistor is connected to the second pin, and the other end of the fourth resistor is grounded.
7. The air conditioner according to claim 6, characterized in that: The signal processing unit further includes: a fifth resistor, one end of the fifth resistor being connected to one end of the sixth resistor, and the other end of the fifth resistor being grounded; The sixth resistor, the other end of the sixth resistor is connected to the second pin.
8. The air conditioner according to claim 7, characterized in that: The door card signal detection port is connected between the fifth resistor and the sixth resistor.
9. The air conditioner according to claim 8, characterized in that: The controller is configured to: When a high level signal is output through the door card signal enhancement port, the transistor is controlled to be in a conducting state; When a low level signal is output through the door card signal enhancement port, the transistor is controlled to be in an off state.
10. The air conditioner according to claim 9, characterized in that: The controller is also configured to: After determining the state of the door card based on the second door card state detection signal, the transistor is controlled to be in an off state.