Detection control assembly and fresh air system

Abstract

The utility model discloses a detection control assembly and a fresh air system, and relates to the technical field of fresh air systems. The detection control assembly comprises an outdoor temperature and humidity detection assembly, an indoor temperature and humidity detection assembly, an SF6 gas detection assembly, a switching value output circuit and a main control circuit. The outdoor temperature and humidity detection assembly can detect outdoor temperature and humidity and output outdoor detection signals. The indoor temperature and humidity detection assembly can detect indoor temperature and humidity and output indoor detection signals. The SF6 gas detection assembly can detect the concentration of indoor SF6 gas and output a gas detection signal. The main control circuit can control the switching value output circuit to output a corresponding fresh air control signal according to the outdoor detection signal, the indoor detection signal and the gas detection signal so as to control the working state of the fresh air execution mechanism, and when it is determined that the SF6 gas concentration exceeds the preset concentration according to the gas detection signal, the fresh air execution mechanism is started. And the switching value output circuit is controlled to output a corresponding alarm control signal so as to control the alarm assembly to give an alarm.

Description

Technical Field

[0001] This utility model relates to the field of fresh air system technology, and in particular to a control component and a fresh air system. Background Technology

[0002] In laboratories, data centers, hospitals, and other places with high requirements for indoor environment, fresh air systems are crucial for ensuring fresh indoor air, suitable temperature and humidity, maintaining personnel health, improving work efficiency, and extending equipment lifespan. Fresh air systems consist of air inlets and exhaust vents on both sides of the building. The air inlets connect to the outside, bringing fresh outdoor air into the room, while the exhaust vents remove used indoor air containing high concentrations of carbon dioxide and other potential pollutants, thus meeting the need for indoor ventilation.

[0003] However, in some special industrial production sites such as nuclear power plants, data centers, and production workshops, the electrical equipment stored there is prone to generating harmful gases during operation, and existing fresh air systems cannot effectively cope with this situation. Utility Model Content

[0004] The main purpose of this invention is to provide a detection and control component that aims to solve the problem that existing fresh air systems cannot effectively cope with the harmful gases generated by indoor electrical equipment during operation.

[0005] To achieve the above objectives, the detection and control component proposed in this utility model is applied to a fresh air system, which includes a fresh air actuator and an alarm component. The detection and control component includes:

[0006] The outdoor temperature and humidity detection component is installed outdoors to detect outdoor temperature and humidity conditions and output corresponding outdoor detection signals.

[0007] An indoor temperature and humidity detection component is installed indoors to detect indoor temperature and humidity conditions and output corresponding indoor detection signals.

[0008] An SF6 gas detection unit, installed indoors, is used to detect the concentration of SF6 gas indoors and output a corresponding gas detection signal;

[0009] A digital output circuit is connected to the fresh air actuator and the alarm component, respectively.

[0010] The main control circuit is connected to the outdoor temperature and humidity detection component, the indoor temperature and humidity detection component, the SF6 gas detection component, and the switch output circuit, respectively.

[0011] The main control circuit is used to control the switch output circuit to output a corresponding fresh air control signal based on the outdoor detection signal, the indoor detection signal, and the gas detection signal, so as to control the working state of the fresh air actuator; the main control circuit is also used to control the switch output circuit to output a corresponding alarm control signal when the SF6 gas concentration is determined to exceed the preset concentration based on the gas detection signal, so as to control the alarm component to sound an alarm.

[0012] In one embodiment, the detection and control component further includes an input control circuit, which is connected to the main control circuit and an external device respectively; the input control circuit is used to convert the trigger signal triggered by the external device into an input control signal and input it to the main control circuit.

[0013] In one embodiment, the outdoor detection signal includes a first temperature signal and a first humidity signal, and the indoor detection signal includes a second temperature signal and a second humidity signal; the outdoor temperature and humidity detection component includes:

[0014] The first temperature sensor is located outdoors and is used to detect the outdoor temperature and output a corresponding first temperature signal.

[0015] The first humidity sensor is installed outdoors to detect outdoor humidity and output a corresponding first humidity signal.

[0016] The indoor temperature and humidity detection component includes:

[0017] The second temperature sensor is installed indoors to detect the indoor temperature and output a corresponding second temperature signal.

[0018] The second humidity sensor is installed indoors to detect indoor humidity and output a corresponding second humidity signal.

[0019] In one embodiment, the detection and control component further includes a first wireless communication module, which is connected to the main control circuit;

[0020] The outdoor temperature and humidity detection component further includes a second wireless communication module, which is connected to the first temperature sensor and the first humidity sensor respectively, and is also wirelessly connected to the first wireless communication module.

[0021] The indoor temperature and humidity detection component further includes a third wireless communication module, which is connected to the second temperature sensor and the second humidity sensor respectively, and is also wirelessly connected to the first wireless communication module.

[0022] The SF6 gas detection assembly includes an SF6 sensor and a fourth wireless communication module. The fourth wireless communication module is connected to the SF6 sensor and is also wirelessly connected to the first wireless communication module.

[0023] In one embodiment, the SF6 gas detection assembly includes an SF6 sensor, a signal amplification circuit, a signal filtering circuit, and an analog-to-digital conversion circuit; the output terminal of the SF6 sensor is connected to the input terminal of the signal amplification circuit, the output terminal of the signal amplification circuit is connected to the input terminal of the signal filtering circuit, the output terminal of the signal filtering circuit is connected to the input terminal of the analog-to-digital conversion circuit, and the output terminal of the analog-to-digital conversion circuit is connected to the main control circuit.

[0024] In one embodiment, the signal amplification circuit includes an operational amplifier, a first resistor and a first capacitor, the signal filtering circuit includes a second resistor and a second capacitor, and the analog-to-digital conversion circuit includes a third resistor, a fourth resistor, a third capacitor and an analog-to-digital converter.

[0025] The operational amplifier's inverting input, one end of the first capacitor, and one end of the first resistor are connected to the output of the SF6 sensor; the operational amplifier's non-inverting input, one end of the second capacitor, one end of the fourth resistor, and one end of the third capacitor are grounded; the operational amplifier's output, the other end of the first resistor, and the other end of the first capacitor are connected to one end of the second resistor; the other end of the second resistor and the other end of the second capacitor are connected to one end of the third resistor; the other end of the third resistor, the other end of the fourth resistor, and the other end of the third capacitor are connected to the input of the analog-to-digital converter; and the output of the analog-to-digital converter is connected to the main control circuit.

[0026] In one embodiment, the detection control component further includes a display module, which is connected to the main control circuit;

[0027] The main control circuit is also used to control the operation of the display module based on the outdoor detection signal, the indoor detection signal, and the gas detection signal.

[0028] This utility model also proposes a fresh air system, including a fresh air actuator and an alarm component, as well as a detection and control component as described above.

[0029] In one embodiment, the fresh air actuator includes:

[0030] An outdoor unit, wherein the outdoor unit is equipped with a compressor for compressing refrigerant;

[0031] The indoor unit is connected to the outdoor unit via a connecting pipe. The indoor unit is equipped with an indoor heat exchange mechanism and an indoor fan. The indoor fan is used to introduce the airflow from the air inlet of the indoor unit into the indoor unit, and after heat exchange by the indoor heat exchange mechanism, it is sent out from the air outlet of the indoor unit.

[0032] The fresh air handling unit includes a first fresh air duct, a second fresh air duct, an intake fan, an exhaust fan, an air filter, a humidifier, and a dehumidifier. The air inlet of the first fresh air duct is connected to the outside, and the air outlet of the first fresh air duct is connected to the air inlet of the indoor unit. The first fresh air duct is provided with an air inlet section, a filtration section, a humidification section, and a dehumidification section. The intake fan is located in the air inlet section, the air filter is located in the filtration section, the humidifier is located in the humidification section, and the dehumidifier is located in the dehumidification section. The air inlet of the second fresh air duct is connected to the indoor unit, and the air outlet of the second fresh air duct is connected to the outside. The exhaust fan is located in the second fresh air duct.

[0033] The compressor, the indoor fan, the indoor heat exchange mechanism, the air intake fan, the exhaust fan, the air filter, the humidifier, and the dehumidifier are all connected to the switch output circuit.

[0034] In one embodiment, the fresh air system further includes a power supply circuit, which is connected to an external power input terminal, the power supply terminal of the fresh air actuator, the power supply terminal of the alarm component, and the power supply terminal of the detection and control component, respectively; the power supply circuit is used to convert the power supply voltage input from the external power input terminal and output it.

[0035] This utility model employs a detection and control component applied to a fresh air system. The fresh air system includes a fresh air actuator and an alarm component. The detection and control component comprises an outdoor temperature and humidity detection component, an indoor temperature and humidity detection component, an SF6 gas detection component, a switch output circuit, and a main control circuit. The outdoor temperature and humidity detection component detects outdoor temperature and humidity and outputs corresponding outdoor detection signals. The indoor temperature and humidity detection component detects indoor temperature and humidity and outputs corresponding indoor detection signals. The SF6 gas detection component detects the indoor SF6 gas concentration and outputs a corresponding gas detection signal. The main control circuit, based on the outdoor and indoor detection signals, controls the switch output circuit to output corresponding fresh air control signals to control the working state of the fresh air actuator, ensuring suitable indoor temperature and humidity. The main control circuit can also, based on the gas detection signals, output corresponding fresh air control signals when the SF6 gas concentration reaches a preset concentration, adjusting the working state of the fresh air actuator to maximize the exhaust volume and simultaneously triggering an alarm. Thus, this utility model can effectively address SF6 gas generated by indoor electrical equipment during operation, reducing safety risks. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0037] Figure 1 A schematic diagram of the structure of an embodiment of the detection and control component provided by this utility model;

[0038] Figure 2 A schematic diagram of the structure of an embodiment of the fresh air system provided by this utility model;

[0039] Figure 3 An electronic circuit diagram of an SF6 gas detection component according to an embodiment of the detection and control component provided by this utility model;

[0040] Figure 4 An electronic circuit diagram of a switching output circuit of a detection and control component provided by this utility model;

[0041] Figure 5 An electronic circuit diagram of the input control circuit of an embodiment of the detection and control component provided by this utility model;

[0042] Figure 6A schematic diagram of the structure of the fresh air actuator in an embodiment of the fresh air system provided by this utility model;

[0043] Figure 7 A schematic diagram of the outdoor unit and indoor unit of a fresh air system according to an embodiment of the present invention.

[0044] Explanation of icon numbers:

[0045]

[0046]

[0047] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0048] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0049] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0050] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0051] It should be noted that in some special industrial production sites such as nuclear power plants, data centers, and production workshops, the electrical equipment stored there may generate harmful gases during operation. Existing fresh air systems cannot detect the concentration of these harmful gases, nor can they adjust their own operating status according to the concentration of these harmful gases, and therefore cannot effectively deal with the problem of harmful gases generated by indoor electrical equipment during operation.

[0052] This utility model proposes a detection and control component.

[0053] Please see Figure 1 In one embodiment of this utility model, the detection and control component is applied to a fresh air system, which includes a fresh air actuator and an alarm component.

[0054] It should be noted that the alarm component may include audible alarm components such as buzzers, and / or photoelectric alarm components such as flashing lights.

[0055] In one feasible implementation, please refer to Figure 6 The implementing agencies for fresh air systems include:

[0056] The outdoor unit contains a compressor for compressing refrigerant.

[0057] The indoor unit is connected to the outdoor unit via a connecting pipe. The indoor unit contains an indoor heat exchange mechanism and an indoor fan. The indoor fan is used to introduce airflow from the air inlet of the indoor unit into the indoor unit, and after heat exchange by the indoor heat exchange mechanism, it is sent out from the air outlet of the indoor unit.

[0058] The fresh air handling unit includes a first fresh air duct, a second fresh air duct, an intake fan, an exhaust fan, an air filter, a humidifier, and a dehumidifier. The air inlet of the first fresh air duct is connected to the outside, and the air outlet of the first fresh air duct is connected to the air inlet of the indoor unit. The first fresh air duct is equipped with an air inlet section, a filtration section, a humidification section, and a dehumidification section. The intake fan is located in the air inlet section, the air filter is located in the filtration section, the humidifier is located in the humidification section, and the dehumidifier is located in the dehumidification section. The air inlet of the second fresh air duct is connected to the indoor unit, and the air outlet of the second fresh air duct is connected to the outside. The exhaust fan is located in the second fresh air duct.

[0059] It should be noted that air filters may include electrostatic dust removal components, which purify air using the principle of electrostatic adsorption. When air passes through a charged filter or an electrostatic field, dust particles in the air become charged and are attracted to and adhere to a collection plate with the opposite charge, thereby achieving the purpose of air purification.

[0060] It should be noted that you should refer to [link / reference]. Figure 7 The outdoor unit may also include a condenser and an outdoor fan, while the indoor heat exchange mechanism may include an evaporator and an expansion valve. When the outdoor and indoor units are used for cooling, the low-temperature, low-pressure gaseous refrigerant is compressed by the compressor into a high-temperature, high-pressure gaseous refrigerant. The high-temperature, high-pressure gaseous refrigerant is cooled into a liquid refrigerant by the condenser. The outdoor fan blows air to accelerate the heat exchange between the air and the high-temperature, high-pressure gaseous refrigerant. The expansion valve throttles the high-pressure liquid refrigerant flowing out of the condenser into a low-temperature, low-pressure gas-liquid mixture. The gas-liquid mixture absorbs heat from the air through the evaporator, becoming a low-temperature, low-pressure gaseous refrigerant that flows back into the compressor.

[0061] Thus, this embodiment controls the fresh air actuator to introduce fresh outdoor air into the air intake section of the first fresh air duct. After passing through a filtration section, a humidification section, and a dehumidification section, the air is then delivered to the air intake of the indoor unit. There, it undergoes heat exchange through the indoor unit's heat exchange mechanism, while the outdoor unit provides the heat-absorbing refrigerant. In this way, the fresh air, after passing through the indoor unit, can be delivered at the air outlet with suitable temperature and humidity, and is relatively fresh. Simultaneously, the exhaust fan can expel the used indoor air, thereby achieving the purpose of indoor fresh air exchange.

[0062] In this embodiment, the detection and control component includes:

[0063] The outdoor temperature and humidity detection component 10 is installed outdoors to detect the outdoor temperature and humidity status and output the corresponding outdoor detection signal.

[0064] The indoor temperature and humidity detection component 20 is installed indoors to detect indoor temperature and humidity conditions and output corresponding indoor detection signals.

[0065] It should be noted that you should refer to [link / reference]. Figure 2 The outdoor detection signal may include a first temperature signal and a first humidity signal, and the indoor detection signal may include a second temperature signal and a second humidity signal. The outdoor temperature and humidity detection component 10 may include: a first temperature sensor 11, which is located outdoors and is used to detect the outdoor temperature and output a corresponding first temperature signal; and a first humidity sensor 12, which is located outdoors and is used to detect the outdoor humidity and output a corresponding first humidity signal. The indoor temperature and humidity detection component 20 may include: a second temperature sensor 21, which is located indoors and is used to detect the indoor temperature and output a corresponding second temperature signal; and a second humidity sensor 22, which is located indoors and is used to detect the indoor humidity and output a corresponding second humidity signal.

[0066] The SF6 gas detection component 30 is installed indoors to detect the concentration of SF6 gas indoors and output a corresponding gas detection signal.

[0067] It should be noted that SF6 gas, or sulfur hexafluoride gas, is a colorless, odorless, and non-flammable gas widely used in high-voltage power equipment, especially in switchgear and power transformers. Under certain specific conditions, such as equipment failure or vibration caused by prolonged operation leading to loosening of seals, SF6 gas leakage may occur, posing a threat to personnel safety and the safe operation of the equipment.

[0068] The switch output circuit 40 is connected to the fresh air actuator and the alarm component respectively.

[0069] It should be noted that the compressor, indoor fan, indoor heat exchange mechanism, intake fan, exhaust fan, air filter, humidifier and dehumidifier are all connected to the switch output circuit 40.

[0070] It should be noted that you should refer to [link / reference]. Figure 4 The switching output circuit 40 may include a multi-channel switching quantum circuit, corresponding to multiple electrical loads of the fresh air actuator. Each switching quantum circuit may include a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a first switching transistor Q1, and a second switching transistor Q2. The first switching transistor Q1 is an NPN transistor, and the second switching transistor Q2 is a PNP transistor. When the main control circuit 50 inputs a high level, the first transistor conducts, and the second transistor is off. Power flows from the power input terminal through the fifth resistor R5, the first transistor, and the eighth resistor R8, resulting in power output and enabling the corresponding electrical load to start operating. When the main control circuit 50 inputs a low level, the first transistor is off, and the second transistor conducts. There is no power output, and the corresponding electrical load stops operating.

[0071] In one feasible implementation, please refer to Figure 2 and Figure 4 The detection and control component may also include a multi-channel relay J1 output circuit, with the output terminal of the switching quantum circuit connected to the controlled terminal of the relay J1 output circuit. It should be noted that the fresh air actuator may include high-power loads such as compressors, and the relay J1 output circuit can be used to control such loads. The relay J1 output circuit may include an optocoupler U2, a fourth capacitor C4, a ninth resistor R9, a tenth resistor R10, a first diode D1, and a relay J1. When there is power output at the output terminal of the switching quantum circuit, the output terminal of the optocoupler U2 is turned on, and current flows through the coil of relay J1, causing its switch to close, i.e., the first and second contacts of relay J1 are closed, allowing the high-power load to start operating. When there is no power output at the output terminal of the switching quantum circuit, the first and second contacts of relay J1 are opened, and the high-power load stops operating.

[0072] In one feasible implementation, please refer to Figure 2 and Figure 5 The detection and control component may also include an input control circuit 60, which is connected to the main control circuit 50 and the external device respectively. The input control circuit 60 is used to convert the trigger signal triggered by the external device into an input control signal and input it to the main control circuit 50.

[0073] It should be noted that the input control circuit 60 may include an eleventh resistor R11 and a third switch Q3, which may specifically be a MOSFET. For example, when the external device inputs a high level, the third switch Q3 is turned on, and the input control circuit 60 outputs a low-level input control signal to the main control circuit 50. When the external device inputs a low level, the third switch Q3 is turned off, and the input control circuit 60 outputs a high-level input control signal to the main control circuit 50. In this way, the main control circuit 50 can be controlled by the external device and operate accordingly based on the input control signal, such as starting or stopping the operation of the fresh air actuator.

[0074] The main control circuit 50 is connected to the outdoor temperature and humidity detection component 10, the indoor temperature and humidity detection component 20, the SF6 gas detection component 30, and the switch output circuit 40, respectively.

[0075] The main control circuit 50 is used to control the switch output circuit 40 to output a corresponding fresh air control signal based on the outdoor detection signal, indoor detection signal and gas detection signal, so as to control the working state of the fresh air actuator; the main control circuit 50 is also used to control the switch output circuit 40 to output a corresponding alarm control signal when the SF6 gas concentration is determined to exceed the preset concentration based on the gas detection signal, so as to control the alarm component to alarm.

[0076] It should be noted that the main control circuit 50 can have built-in automatic mode, manual mode, energy-saving mode, and night mode. In automatic mode, the main control circuit 50 automatically adjusts the working state of the fresh air actuator based on outdoor and indoor temperature and humidity signals to maintain indoor temperature and humidity within a comfortable range. When the SF6 gas concentration exceeds the preset concentration, the exhaust function is immediately activated to reduce the indoor SF6 gas concentration and trigger an alarm. Assuming the indoor temperature is 25℃ and humidity is 60%, and the outdoor temperature is 30℃ and humidity is 50%, the main control circuit 50 determines that the indoor temperature is suitable and the humidity is high, and the outdoor temperature is high and the humidity is suitable. It then activates the fresh air system to introduce an appropriate amount of fresh air, while simultaneously activating the indoor heat exchange mechanism to cool the introduced air and expel some of the humid indoor air, maintaining indoor temperature and humidity within a comfortable range. Assuming the indoor SF6 gas concentration is 100ppm, exceeding the preset safety threshold (e.g., 50ppm). The main control circuit 50 immediately controls the fresh air actuator to operate at maximum exhaust volume. At this time, both the intake and exhaust fans operate at maximum power, and an alarm control signal is output to trigger the alarm component, alerting staff to take action. In manual mode, users can manually set the operating parameters of the fresh air system, such as fan speed and air volume, through the control panel. Even in manual mode, the main control circuit 50 continuously monitors the SF6 gas concentration. Once it exceeds the preset value, it immediately starts the exhaust equipment and triggers an alarm. In energy-saving mode, energy consumption is minimized while ensuring indoor temperature, humidity, and air quality. Assuming an indoor temperature of 26℃ and humidity of 50%, and an outdoor temperature of 24℃ and humidity of 45%, the main control circuit 50 determines that although the outdoor temperature and humidity are more suitable, the indoor temperature and humidity are kept within a reasonable range. Therefore, the operating intensity of the fresh air system can be reduced, maintaining only the minimum fan speed and air volume to save energy. If the SF6 gas concentration rises above the preset value, the main control circuit immediately controls the fresh air actuator to operate at maximum exhaust volume and triggers an alarm. In night mode, the fresh air system operates in low-noise mode to ensure user sleep quality, maintain basic ventilation, and ensure indoor air quality. If the SF6 gas concentration rises above a preset value, the fresh air actuator is immediately controlled to operate at maximum exhaust volume, and an alarm is triggered. Thus, this embodiment can control the switch output circuit 40 to output corresponding fresh air control signals based on indoor and outdoor temperature and humidity conditions, thereby controlling the operating state of the fresh air actuator to maintain a suitable indoor temperature and humidity. When the indoor SF6 gas concentration reaches the preset concentration, the switch output circuit 40 outputs corresponding fresh air control signals and alarm control signals, controlling the fresh air actuator to operate at maximum exhaust volume and triggering the alarm component.Thus, compared with the prior art, this embodiment can detect the concentration of SF6 gas and adjust the working state of the fresh air actuator when the concentration of SF6 gas reaches the preset concentration, so that the exhaust volume reaches the maximum and the alarm component is triggered at the same time. This can effectively deal with the SF6 gas generated by the electrical equipment stored indoors during operation and reduce safety risks.

[0077] In this invention, the outdoor temperature and humidity detection component 10 can detect outdoor temperature and humidity and output corresponding outdoor detection signals; the indoor temperature and humidity detection component 20 can detect indoor temperature and humidity and output corresponding indoor detection signals; and the SF6 gas detection component 30 can detect the indoor SF6 gas concentration and output corresponding gas detection signals. The main control circuit 50 can control the switch output circuit 40 to output corresponding fresh air control signals based on the outdoor and indoor detection signals, thereby controlling the working state of the fresh air actuator to ensure suitable indoor temperature and humidity. The main control circuit 50 can also output corresponding fresh air control signals based on the gas detection signals when the SF6 gas concentration reaches a preset concentration, adjusting the working state of the fresh air actuator to maximize the exhaust volume and simultaneously triggering an alarm component. Thus, this invention can effectively address the SF6 gas generated by indoor electrical equipment during operation, reducing safety risks.

[0078] Please see Figure 2 In one embodiment of the present invention, the detection control component further includes a first wireless communication module 70, which is connected to the main control circuit 50.

[0079] The outdoor temperature and humidity detection component 10 also includes a second wireless communication module 13, which is connected to the first temperature sensor 11 and the first humidity sensor 12 respectively, and is also wirelessly connected to the first wireless communication module 70.

[0080] The indoor temperature and humidity detection component 20 also includes a third wireless communication module 23, which is connected to the second temperature sensor 21 and the second humidity sensor 22 respectively, and is also wirelessly connected to the first wireless communication module 70.

[0081] The SF6 gas detection assembly 30 includes an SF6 sensor 31 and a fourth wireless communication module 32. The fourth wireless communication module 32 is connected to the SF6 sensor 31 and is also wirelessly connected to the first wireless communication module 70.

[0082] In this embodiment, the wireless communication module can communicate via wireless technologies such as Wi-Fi, Bluetooth, and Zigbee. In this embodiment, the various detection components can be freely arranged without wiring, improving the system's flexibility.

[0083] Please see Figure 3 In one embodiment of this utility model, the SF6 gas detection component 30 includes an SF6 sensor 31, a signal amplification circuit 33, a signal filtering circuit 34, and an analog-to-digital conversion circuit 35; the output terminal of the SF6 sensor 31 is connected to the input terminal of the signal amplification circuit 33, the output terminal of the signal amplification circuit 33 is connected to the input terminal of the signal filtering circuit 34, the output terminal of the signal filtering circuit 34 is connected to the input terminal of the analog-to-digital conversion circuit 35, and the output terminal of the analog-to-digital conversion circuit 35 is connected to the main control circuit 50.

[0084] In one feasible embodiment, the signal amplification circuit 33 includes an operational amplifier OP1, a first resistor R1 and a first capacitor C1, the signal filtering circuit 34 includes a second resistor R2 and a second capacitor C2, and the analog-to-digital conversion circuit 35 includes a third resistor R3, a fourth resistor R4, a third capacitor C3 and an analog-to-digital converter U1.

[0085] Specifically, the inverting input of operational amplifier OP1, one end of the first capacitor C1, and one end of the first resistor R1 are connected to the output of SF6 sensor 31; the non-inverting input of operational amplifier OP1, one end of the second capacitor C2, one end of the fourth resistor R4, and one end of the third capacitor C3 are grounded; the output of operational amplifier OP1, the other end of the first resistor R1, and the other end of the first capacitor C1 are connected to one end of the second resistor R2; the other end of the second resistor R2 and the other end of the second capacitor C2 are connected to one end of the third resistor R3; the other end of the third resistor R3, the other end of the fourth resistor R4, and the other end of the third capacitor C3 are connected to the input of analog-to-digital converter U1; and the output of analog-to-digital converter U1 is connected to the main control circuit 50.

[0086] In this embodiment, the gas detection signal output by the SF6 sensor 31 is amplified by a signal amplification circuit 33 consisting of operational amplifier OP1, first resistor R1, and first capacitor C1; filtered by a signal filtering circuit 34 consisting of second resistor R2 and second capacitor C2; sampled by a sampling circuit consisting of third resistor R3, fourth resistor R4, and third capacitor C3; and then input to analog-to-digital converter U1 for analog-to-digital conversion, converting it into a digital signal that is input to the main control circuit 50. Thus, the detected gas detection signal is relatively accurate.

[0087] Please see Figure 2 In one embodiment of the present invention, the detection control component further includes a display module 80, which is connected to the main control circuit 50.

[0088] The main control circuit 50 is also used to control the operation of the display module 80 based on the outdoor detection signal, the indoor detection signal, and the gas detection signal.

[0089] In this embodiment, the display module 80 can display key parameters such as outdoor and indoor temperature and humidity, and SF6 gas concentration in real time, so that users can understand the current environmental conditions at any time.

[0090] In one feasible implementation, the display module 80 may be equipped with a touch screen, and the user may also operate through the touch screen, such as switching display content and adjusting the operating mode.

[0091] This utility model also proposes a fresh air system, which includes a fresh air actuator, an alarm component, and the aforementioned detection and control component. The specific structure of the detection and control component is as described in the above embodiments. Since this fresh air system adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here.

[0092] In one embodiment of this utility model, the fresh air system further includes a power supply circuit (not shown in the figure). The power supply circuit is connected to the external power input terminal, the power supply terminal of the fresh air actuator, the power supply terminal of the alarm component, and the power supply terminal of the detection and control component. The power supply circuit is used to convert the power supply voltage input from the external power input terminal and output it.

[0093] In this embodiment, by converting the input power through the power supply circuit, the fresh air system can be ensured to work stably in power environments with different voltage levels or types, thereby improving the system's adaptability and flexibility.

[0094] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A detection and control component applied to a fresh air system, the fresh air system comprising a fresh air actuator and an alarm component, characterized in that, The detection control component includes: The outdoor temperature and humidity detection component is installed outdoors to detect outdoor temperature and humidity conditions and output corresponding outdoor detection signals. An indoor temperature and humidity detection component is installed indoors to detect indoor temperature and humidity conditions and output corresponding indoor detection signals. An SF6 gas detection unit, installed indoors, is used to detect the concentration of SF6 gas indoors and output a corresponding gas detection signal; A digital output circuit is connected to the fresh air actuator and the alarm component, respectively. The main control circuit is connected to the outdoor temperature and humidity detection component, the indoor temperature and humidity detection component, the SF6 gas detection component, and the switch output circuit, respectively. The main control circuit is used to control the switch output circuit to output a corresponding fresh air control signal based on the outdoor detection signal, the indoor detection signal, and the gas detection signal, so as to control the working state of the fresh air actuator; the main control circuit is also used to control the switch output circuit to output a corresponding alarm control signal when the SF6 gas concentration is determined to exceed the preset concentration based on the gas detection signal, so as to control the alarm component to sound an alarm.

2. The detection and control component as described in claim 1, characterized in that, The detection and control component further includes an input control circuit, which is connected to the main control circuit and the external device respectively. The input control circuit is used to convert the trigger signal triggered by the external device into an input control signal and input it to the main control circuit.

3. The detection and control component as described in claim 1, characterized in that, The outdoor detection signal includes a first temperature signal and a first humidity signal, and the indoor detection signal includes a second temperature signal and a second humidity signal; The outdoor temperature and humidity detection component includes: The first temperature sensor is located outdoors and is used to detect the outdoor temperature and output a corresponding first temperature signal. The first humidity sensor is installed outdoors to detect outdoor humidity and output a corresponding first humidity signal. The indoor temperature and humidity detection component includes: The second temperature sensor is installed indoors to detect the indoor temperature and output a corresponding second temperature signal. The second humidity sensor is installed indoors to detect indoor humidity and output a corresponding second humidity signal.

4. The detection and control component as described in claim 3, characterized in that, The detection and control component further includes a first wireless communication module, which is connected to the main control circuit. The outdoor temperature and humidity detection component further includes a second wireless communication module, which is connected to the first temperature sensor and the first humidity sensor respectively, and is also wirelessly connected to the first wireless communication module. The indoor temperature and humidity detection component further includes a third wireless communication module, which is connected to the second temperature sensor and the second humidity sensor respectively, and is also wirelessly connected to the first wireless communication module. The SF6 gas detection assembly includes an SF6 sensor and a fourth wireless communication module. The fourth wireless communication module is connected to the SF6 sensor and is also wirelessly connected to the first wireless communication module.

5. The detection and control component as described in claim 1, characterized in that, The SF6 gas detection assembly includes an SF6 sensor, a signal amplification circuit, a signal filtering circuit, and an analog-to-digital converter circuit. The output terminal of the SF6 sensor is connected to the input terminal of the signal amplification circuit, the output terminal of the signal amplification circuit is connected to the input terminal of the signal filtering circuit, the output terminal of the signal filtering circuit is connected to the input terminal of the analog-to-digital converter circuit, and the output terminal of the analog-to-digital converter circuit is connected to the main control circuit.

6. The detection and control component as described in claim 5, characterized in that, The signal amplification circuit includes an operational amplifier, a first resistor and a first capacitor; the signal filtering circuit includes a second resistor and a second capacitor; and the analog-to-digital conversion circuit includes a third resistor, a fourth resistor, a third capacitor and an analog-to-digital converter. The operational amplifier's inverting input, one end of the first capacitor, and one end of the first resistor are connected to the output of the SF6 sensor; the operational amplifier's non-inverting input, one end of the second capacitor, one end of the fourth resistor, and one end of the third capacitor are grounded; the operational amplifier's output, the other end of the first resistor, and the other end of the first capacitor are connected to one end of the second resistor; the other end of the second resistor and the other end of the second capacitor are connected to one end of the third resistor; the other end of the third resistor, the other end of the fourth resistor, and the other end of the third capacitor are connected to the input of the analog-to-digital converter; and the output of the analog-to-digital converter is connected to the main control circuit.

7. The detection and control component as described in claim 1, characterized in that, The detection and control component also includes a display module, which is connected to the main control circuit. The main control circuit is also used to control the operation of the display module based on the outdoor detection signal, the indoor detection signal, and the gas detection signal.

8. A fresh air system, characterized in that, It includes a fresh air actuator and an alarm component, as well as a detection and control component as described in any one of claims 1 to 7.

9. The fresh air system as described in claim 8, characterized in that, The fresh air actuator includes: An outdoor unit, wherein the outdoor unit is equipped with a compressor for compressing refrigerant; The indoor unit is connected to the outdoor unit via a connecting pipe. The indoor unit is equipped with an indoor heat exchange mechanism and an indoor fan. The indoor fan is used to introduce the airflow from the air inlet of the indoor unit into the indoor unit, and after heat exchange by the indoor heat exchange mechanism, it is sent out from the air outlet of the indoor unit. The fresh air handling unit includes a first fresh air duct, a second fresh air duct, an intake fan, an exhaust fan, an air filter, a humidifier, and a dehumidifier. The air inlet of the first fresh air duct is connected to the outside, and the air outlet of the first fresh air duct is connected to the air inlet of the indoor unit. The first fresh air duct is provided with an air inlet section, a filtration section, a humidification section, and a dehumidification section. The intake fan is located in the air inlet section, the air filter is located in the filtration section, the humidifier is located in the humidification section, and the dehumidifier is located in the dehumidification section. The air inlet of the second fresh air duct is connected to the indoor unit, and the air outlet of the second fresh air duct is connected to the outside. The exhaust fan is located in the second fresh air duct. The compressor, the indoor fan, the indoor heat exchange mechanism, the air intake fan, the exhaust fan, the air filter, the humidifier, and the dehumidifier are all connected to the switch output circuit.

10. The fresh air system as described in claim 8, characterized in that, The fresh air system also includes a power supply circuit, which is connected to an external power input terminal, the power supply terminal of the fresh air actuator, the power supply terminal of the alarm component, and the power supply terminal of the detection and control component. The power supply circuit is used to convert the power voltage input from the external power input terminal and output it.

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