WO2022194235A1

WO2022194235A1 - Gas detection apparatus and control method therefor

Info

Publication number: WO2022194235A1
Application number: PCT/CN2022/081354
Authority: WO
Inventors: 吴承禹
Original assignee: 杭州三花研究院有限公司
Priority date: 2021-03-18
Filing date: 2022-03-17
Publication date: 2022-09-22
Also published as: CN115112828A

Abstract

Provided in embodiments of the present application are a gas detection apparatus and a control method therefor. The gas detection apparatus comprises: at least two detection modules, which are used for detecting gas concentration signals, and comprise a first detection module and a second detection module; a switching module, which is used for respectively realizing the turning-on and turning-off of each detection module; and a processing module, which is used for controlling the switching module, so that the switching module switches the second detection module from a turned-off state to a turned-on state while switching the first detection module from the turned-on state to the turned-off state.

Description

Gas detection device and control method thereof

technical field

The present application relates to the technical field of gas detection, and in particular, to a gas detection device and a control method thereof.

Background technique

The gas detection device in the related art includes a processing module and a plurality of detection modules. The detection module is used to detect the gas concentration signal and send the gas concentration signal to the processing module, and the processing module is used to make corresponding preset processing according to the gas concentration signal, The detection module is electrically connected with the processing module, and the multiple detection modules are arranged in parallel, and the multiple detection modules are simultaneously turned on when the gas detection device works, so as to ensure that the gas detection device can continue to work after one of the detection modules fails. In the related art, multiple detection modules are simultaneously turned on, and multiple detection modules are worn out at the same time, and the service life of the gas detection device is short.

SUMMARY OF THE INVENTION

The present application provides a gas detection device and a control method thereof, which are beneficial to prolong the service life of the gas detection device.

In a first aspect, the present application provides a gas detection device, comprising:

at least two detection modules, the detection modules are used to detect the gas concentration signal, and the at least two detection modules include a first detection module and a second detection module;

a switching module, for respectively realizing the opening and closing of each of the detection modules;

The processing module is configured to control the switching module, so that the switching module switches the first detection module from the on state to the off state, and the switching module switches the second detection module from the off state to the on state.

The processing module in the gas detection device of the present application is used to control the switching module, so that when the switching module switches the first detection module from the open state to the closed state, it switches the second detection module from the closed state to the open state, so that the first detection module is switched from the closed state to the open state. The detection module and the second detection module are not in the open state at the same time, and the second detection module is only turned on when the first detection module is closed, which is beneficial to prolong the service life of the gas detection device.

In a second aspect, the present application provides a control method of a gas detection device, the gas detection device includes at least two detection modules, the at least two detection modules include a first detection module and a second detection module, the method include:

turning on the first detection module, so that the first detection module enters the turned-on state;

obtaining the working information of the first detection module;

Based on the working information, determine whether the first detection module is in the working mode;

If the first detection module is not in the working mode, the first detection module is switched to the off state, and the second detection module is switched from the off state to the on state at the same time.

The control method of the gas detection device in the present application determines that the first detection module is not in the working mode, then switches the first detection module to the off state, and simultaneously switches the second detection module from the off state to the on state, so that the first detection module Unlike the second detection module, which is not in an open state at the same time, the second detection module is only turned on when the first detection module is closed, which is beneficial to prolong the service life of the gas detection device.

Description of drawings

Fig. 1 is the principle schematic diagram of one embodiment of the gas detection device of the application;

FIG. 2 is a schematic diagram of an embodiment of a power supply module, a switching module, a processing module and a detection module as shown in FIG. 1;

3 is a schematic flowchart of an embodiment of the control method of the gas detection device of the present application;

FIG. 4 is a schematic flowchart of an embodiment of steps S20, S30 and S40 shown in FIG. 3;

FIG. 5 is a schematic flowchart of an embodiment of step S201 shown in FIG. 4;

6 is a schematic flowchart of another embodiment of steps S20, S30 and S40 shown in FIG. 3;

FIG. 7 is a schematic flowchart of another embodiment of the control method of the gas detection device of the present application.

Detailed ways

The terms used in the embodiments of the present application are only used to explain specific embodiments of the present application, and are not intended to limit the present application.

Refrigerants such as Freon (R22) used in air-conditioning systems will damage the ozone layer in the atmosphere, easily leading to the formation of a hole in the ozone layer, allowing sunlight to directly irradiate the surface of the earth, causing damage to plants or humans. In order to protect the atmospheric ozone layer, R32 (chemical name is difluoromethane, which is a halogenated hydrocarbon, chemical formula is CH ₂ F ₂ ) is used as a refrigerant in current air conditioners. However, R32 is slightly flammable, and can form explosive mixtures when mixed with air. When encountering heat sources or open flames, there is a danger of combustion and explosion, and there is a potential safety hazard. Therefore, using a gas detection device to detect the R32 concentration in the air around the refrigerant conveying pipeline of the air-conditioning system in real time is one of the means to eliminate potential safety hazards.

The gas detection device in the related art includes a processing module and a plurality of detection modules. The detection module is used to detect the gas concentration signal and send the gas concentration signal to the processing module, and the processing module is used to make corresponding preset processing according to the gas concentration signal, The detection module is electrically connected to the processing module, and multiple detection modules are arranged in parallel, and the multiple detection modules are simultaneously turned on when the gas detection device is working, so as to ensure that the gas detection device continues to work after one of the detection modules fails. In the related art, multiple detection modules are simultaneously turned on, and multiple detection modules are worn out at the same time, and the service life of the gas detection device is short.

To this end, the present application proposes a gas detection device and a control method thereof, which are beneficial to prolong the service life of the gas detection device.

FIG. 1 is a schematic diagram of the principle of an embodiment of the gas detection device of the present application. As shown in FIG. 1 , the gas detection device 100 may include: at least two detection modules 10 , each of the detection modules 10 is used to detect a gas concentration signal, and the at least two detection modules 10 include a first detection module 11 and a The second detection module 12; the switching module 20 is used to respectively enable and disable each detection module 10; the processing module 30 is used to control the switching module 20, so that the switching module 20 can change the first detection module 11 from the ON state When switching to the off state, the switching module 20 switches the second detection module 12 from the off state to the on state.

The detection module 10 includes a gas sensor. The gas sensor can collect gas concentration information and convert the gas concentration information into a gas concentration signal. The types of gas sensors mainly include electrochemical, semiconductor, infrared optical, solid electrolyte, and catalytic combustion. For gas sensors such as gas sensors, one detection module 10 may be one of electrochemical gas sensors, semiconductor gas sensors, infrared optical gas sensors, solid electrolyte gas sensors, and catalytic combustion gas sensors.

In one possible implementation, the detection module 10 further includes an amplification filter circuit and an analog-to-digital converter (A/D converter) electrically connected to the gas sensor, and the gas sensor transmits the collected gas concentration signal to the amplification filter circuit , the gas concentration signal is amplified and filtered by the amplifying filter circuit to make the signal more stable and smooth. to the processing module 30.

The switching module 20 is used to enable and disable each detection module 10 respectively. It can be understood that the opening and closing of each detection module 10 can be realized separately, and the opening and closing of each detection module 10 can be realized separately, and the realization of opening and closing of each detection module 10 is not related to the opening and closing of other detection modules 10. .

The processing module 30 can control the switching module 20 so that the switching module 20 switches the first detection module 11 from the on state to the off state, and the switching module 20 switches the second detection module 12 from the off state to the on state. In one use case, if the first detection module 11 currently in the open state reaches its service life or fails, the first detection module 11 is controlled to be turned off, and the second detection module 12 is switched from the closed state to the open state at the same time, so as to ensure The normal use of the gas detection device 100 is beneficial to prolong the service life of the gas detection device 100 . In another usage situation, the first detection module 11 that is currently in the open state is in a normal use state (not reaching the service life and not failing), the first detection module 11 is controlled to be turned off, and the second detection module 12 is switched from the off state at the same time. In the open state, the first detection module 11 and the second detection module 12 are not turned on at the same time, thereby prolonging the service life of the gas detection device 100 .

Since the processing module 30 in the present application is used to control the switching module 20, the switching module switches the first detection module 11 from the ON state to the OFF state, and simultaneously switches the second detection module 12 from the OFF state to the ON state, so that the first detection module 12 is switched from the OFF state to the ON state. When the first detection module 11 and the second detection module 12 are not in the open state at the same time, the first detection module 11 and the second detection module 12 will not be worn out at the same time, and the second detection module 12 is only turned on when the first detection module 11 is turned off, thereby It is beneficial to prolong the service life of the gas detection device 100 .

In a possible implementation manner, the processing module 30 of the present application can also be used to determine whether gas leakage occurs according to the gas concentration signal detected by the detection module 10, and if the determination result is that a gas leakage occurs, send an alarm signal.

Further, as shown in FIG. 1 , the gas detection device 100 further includes a power module 40 . The power module 40 is electrically connected to the switching module 20 , the switching module 20 is electrically connected to each detection module 10 respectively, and the detection modules 10 are arranged in parallel. The power module 40 is used to provide the power required for each detection module 10 to work, and the switch module 20 is used to control the electrical connection and disconnection between each detection module 10 and the power module 40 . The switching module 20 controls the electrical connection and disconnection between each detection module 10 and the power supply module 40, so as to realize the power-on or power-off of each detection module 10, so as to realize the opening and closing of each detection module 10, and the detection module 10 is on when powered on and off when powered off. That is, if the detection module 10 is in an on state, it means it is in a power-on state, and if the detection module 10 is in an on-off state, it means it is in an off state.

In a possible implementation manner, the switching module 20 includes a plurality of switching switches. The number of switching switches is the same as that of the detection modules 10 , and one switching switch corresponds to one detection module 10 , that is, the switching switches and the detection modules 10 are set in one-to-one correspondence. The switches are respectively used to realize the electrical connection and disconnection between the corresponding detection module 10 and the power supply module 40 , so as to realize the opening and closing of each detection module 10 . Specifically, the switch has two states: open and closed. When the switch is open, the corresponding detection module 10 and the power module 40 are disconnected. When the switch is closed, the corresponding detection module 10 and the power module are disconnected. Electrical connection between 40. That is, when the switch is turned off, the corresponding detection module 10 is turned off, and when the switch is turned on, the corresponding detection module 10 is turned on.

In order to express the relationship between the switch and each module more clearly, FIG. 2 is a schematic diagram showing the principle of an embodiment of a power module, a switch module, a processing module and a detection module. The switching module 20 includes a first switching switch 21 , a second switching switch 22 , a third switching switch 23 and a fourth switching switch 24 , and the at least two detection modules 10 include a first detection module 11 , a second detection module 12 , and a third detection module 11 . The module 13 and the fourth detection module 14 . As shown in FIG. 2 , the first detection module 11 can be electrically connected to and disconnected from the power supply module 40 through the first switch 21, that is, the first switch 21 is used to turn on and off the first detection module 11. Similarly, the second switch 22 is used to enable and disable the second detection module 12; the third switch 23 is used to enable and disable the third detection module 13; the fourth switch 24 is used to enable the fourth detection The opening and closing of the module 14. The processing module 30 is used to control the first switch 21 , the second switch 22 , the third switch 23 and the fourth switch 24 respectively, so as to control the first detection module 11 , the second detection module 12 and the third detection module respectively 13 and the opening and closing of the fourth detection module 14 .

In this embodiment, the number of switching switches and detection modules is not limited to this, and "first", "second" and similar expressions do not represent a specific switching switch or detection module, but are for a more intuitive description The technical solution of this application.

In a possible implementation manner, when in use, the processing module 30 controls the first switch 21 to be closed, while the other switches are turned off. The above possible implementations can be applied to this application scenario: the processing module 30 first controls the first switch 21 to control the first detection module 11 to turn on, and controls other detection modules to turn off, when the first detection module 11 fails or its use When the service life is reached, the processing module 30 controls the first switch 21 to turn off the first detection module 11 and turns on the second detection module 12. When the second detection module 12 fails or its service life is reached, the processing module 30 controls the first detection module 12 to turn on. The second switch 22 is used to control the second detection module 12 to be turned off, and to control the third detection module 13 to be turned on, and so on.

Therefore, the service life of the gas detection device 100 will not be caused by the failure of one of the detection modules or the expiration of the service life of the gas detection device 100, so that the service life of the gas detection device 100 can be prolonged. The service life of the detection device 100 is equal to the sum of the ON times of the first detection module 11 , the second detection module 12 , the third detection module 13 and the fourth detection module 14 .

One of the possible implementations is that the switch can be a relay.

In one possible implementation manner, as shown in FIG. 1 , the gas detection device 100 further includes a storage module 50, and the storage module 50 is used to record the working information of each of the detection modules 10, and the processing module 30 also It is used to read the working information recorded by the storage module 50 and control the switching module 20 based on the working information.

For example, the work information may include the cumulative duration of each detection module 10 being in an on state. Initially, the first detection module 11 is turned on, and the other detection modules are turned off. If the accumulated time of the first detection module 11 reaches a preset threshold (such as a preset service life, etc.), the second detection module 12 is turned on, and the other detection modules are turned on. If the accumulated time of the second detection module 12 reaches the preset threshold, the third detection module 13 is turned on, and the other detection modules are turned off, and so on. If the types of the first detection module 11 and the second detection module 12 are different, the preset threshold value corresponding to the first detection module 11 and the preset threshold value corresponding to the second detection module 12 may also be different.

For another example, the working information may also include the working status of each detection module 10, and the working status is used to determine whether the detection module 10 fails. After one of the detection modules (such as the first detection module 11 ) is turned on, if it is determined that the current detection module 10 is invalid according to the working state of the currently turned on detection module 10 , the current detection module (such as the first detection module 11 ) is closed. , and turn on the next detection module (eg, turn on the second detection module 12 ) to ensure the normal use of the gas detection device 100 .

The gas detection device 100 in this embodiment can be applied to an air-conditioning system used for refrigeration, such as an air conditioner, a refrigerator, a freezer, etc., and the air-conditioning system can include a refrigerant conveying pipeline (such as R32, R454B, etc.) Or heat exchanger pipes, etc.), the gas detection device 100 can be used to detect the gas concentration around the refrigerant conveying pipes to determine whether there is refrigerant leakage and other phenomena, so as to ensure the safety of the air conditioning system.

It should be understood that the division of each module of the gas detection device shown in the above figure is only a division of logical functions, and in actual implementation, it may be fully or partially integrated into a physical entity, or may be physically separated. And these modules can all be implemented in the form of software calling through processing elements; they can also all be implemented in hardware; some modules can also be implemented in the form of software calling through processing elements, and some modules can be implemented in hardware. For example, the processing module may be a separately established processing element, or may be integrated in a certain chip of the air-conditioning system. The implementation of other modules is similar. In addition, all or part of these modules can be integrated together, and can also be implemented independently. In the implementation process, each step of the above-mentioned method or each of the above-mentioned modules can be completed by an integrated logic circuit of hardware in the processor element or an instruction in the form of software.

For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more specific integrated circuits (Application Specific Integrated Circuit; hereinafter referred to as: ASIC), or, one or more microprocessors Digital Singnal Processor (hereinafter referred to as: DSP), or, one or more Field Programmable Gate Array (Field Programmable Gate Array; hereinafter referred to as: FPGA), etc. For another example, these modules can be integrated together and implemented in the form of a system-on-a-chip (System-On-a-Chip; hereinafter referred to as: SOC).

FIG. 3 is a schematic flowchart of an embodiment of the control method of the gas detection device of the present application. The gas detection device in this embodiment can be applied to an air-conditioning system used for refrigeration, such as an air conditioner, a refrigerator, a freezer, etc., and the air-conditioning system may include a refrigerant conveying pipeline (or Heat exchanger pipes, etc.), the gas detection device can be used to detect the gas concentration around the refrigerant conveying pipes to determine whether there is refrigerant leakage and other phenomena, so as to ensure the safety of the air conditioning system. The gas detection device in the present application includes at least two detection modules, and the at least two detection modules include a first detection module and a second detection module. In a possible implementation manner, the gas detection device 100 of the present application may execute the control method of the gas detection device of the present application.

The control method of the gas detection device may include the following steps:

S10, turning on the first detection module, so that the first detection module enters the turned-on state;

S20, obtaining the working information of the first detection module;

S30, based on the work information, determine whether the first detection module is in a work mode;

S40. If the first detection module is not in the working mode, switch the first detection module to the off state, and simultaneously switch the second detection module from the off state to the on state.

Before the air conditioning system is initially powered on and started, at least two detection modules are in a closed state. After the air conditioning system is initially powered on and started, the first detection module is turned on, so that the first detection module is turned on, and the other detection modules are still turned off.

It can be understood that when the first detection module is in an on state, the service life of the first detection module is consumed.

In one possible implementation manner, the gas detection device further includes a power supply module, and step S10 may include: electrically connecting the first detection module with the power supply module. The power supply module may supply power to the first detection module in a direct current manner, so that the first detection module enters an on state.

Specifically, the gas detection device may further include a processing module and a switching module, the switching module includes a plurality of switching switches, the switching switches and the detection modules are set in one-to-one correspondence, and the switching switches in the switching module are used to realize their corresponding The electrical connection and disconnection between the detection module and the power supply module, when the switch is disconnected, the detection module is in a closed state, and when the switch is closed, the detection module is in an open state. The processing module is used to control the opening and closing of the switch in the switch module. The plurality of switch switches include at least a first switch switch and a second switch switch, the first switch switch is used to realize the electrical connection and disconnection of the first detection module and the power module, and the second switch The switch is used to realize the electrical connection and disconnection of the second detection module and the power module.

For example, the toggle switch may be a relay.

That is, in step S10, the first switch is controlled to be closed, so as to connect the first detection module to the power supply module, so that the first detection module is in an on state. The other switches are still in the off state, so that the other detection modules are still in the off state.

In step S10 and step S40, a possible implementation manner, if the detection module is in an on state means that the detection module is in a power-on state, and if the detection module is in an off state, it means that the detection module is in a power-off state.

In step S20, the working information may include the cumulative duration of each detection module in an on state, and the working state of each detection module (eg, whether the detection module performs gas concentration collection), and the like. In one possible implementation manner, the gas detection device includes a timer and a storage module, the timer starts timing when the detection module is started, the storage module stores the timing time, and the accumulated time of the detection module is obtained, that is, the timer is read from the storage module timing time.

In step S30, the detection module is in the working mode to perform accurate gas concentration signal detection for the detection module. Accurate detection of gas concentration signals includes gas concentration collection, transmission of gas concentration signals, and accurate detection of gas concentration signals.

In this embodiment, the gas detection device may include at least two detection modules, and the at least two detection modules include at least a first detection module and a second detection module. Before the gas detection device is used, none of the detection modules are used, or none of the detection modules are used for gas concentration collection, and the service life is not lost.

In a possible implementation manner, the working information of the first detection module is the accumulated duration of the first detection module in an on state, and the working mode means that the accumulated duration of the first detection module in an open state is less than a preset first threshold. If the accumulated time when the first detection module is in the open state is greater than or equal to the preset first threshold, the gas concentration signal detected by the first detection module is inaccurate. Therefore, when the accumulated time when the first detection module is in the open state is longer than or equal to the preset first threshold, it is determined that the first detection module is not in the working mode.

As shown in FIG. 4 , step S20 may include the following steps: S201, obtain the accumulated duration when the first detection module is on; Step S30 may include the following steps: S301, determine whether the accumulated duration is greater than or equal to a first threshold; Step S40 may include the following steps: S401 , if the accumulated duration is greater than or equal to the first threshold, switch the first detection module from the on state to the off state, and simultaneously switch the second detection module from the off state to the on state.

In step S201, the accumulated time period is the time period when the first detection module is in an on state, and when the first detection module is in an on state, the first detection module is in a power-on state.

The first detection module collects gas concentration information, and converts the gas concentration information into a gas concentration signal. For example, in this embodiment, the detection module may include an amplification filter circuit and an analog-to-digital converter (A/D converter) electrically connected to the sensor, and the gas sensor transmits the collected gas concentration signal to the amplification filter circuit, the gas concentration signal is amplified and filtered by the amplifying filter circuit to make the signal more stable and smooth, and the analog-to-digital converter is used to perform analog-to-digital conversion processing on the filtered signal to obtain a digital signal, and this The digital signal is transmitted to the processing module.

In one possible implementation manner, step S201 may include the following steps:

S103, adding the opening time of the first detection module;

S104, determine whether the opening time is greater than or equal to 24 hours;

S105. If it is determined that the opening time is greater than or equal to 24 hours, the accumulated time is accumulated for one day, and the added opening time is cleared.

In one possible implementation manner, the gas detection device includes a timer and a storage module. In step S103, the timer adds the ON time of the first detection module, and the timer starts counting after step S101 is completed, that is, the timer starts from The first detection module starts timing when it enters the ON state, and the storage module stores the ON time of the first detection module added by the timer, so that the processing module can obtain the ON time of the first detection module from the storage module.

In step S104, the processing module of the gas detection device reads the opening time of the first detection module recorded in the storage module, and determines whether the added opening time is greater than or equal to 24 hours.

In step S104, if the processing module determines that the added opening time of the first detection module is greater than or equal to 24 hours, then proceed to step S105, and if it is determined that the added opening time of the first detection module is less than 24 hours, the control of the gas detection device This flow of the method ends and goes to the next flow, and so on.

In step S105, if the processing module determines that the opening time of the first detection module is greater than or equal to 24 hours, then the accumulated time recorded in the storage module is accumulated by one day, and the processing module adds the timer recorded in the storage module to the first detection module The turn-on time of the module is cleared. While clearing the added on-time of the storage module, the timer re-times, that is, the timer starts to add the on-time again, and the storage module records the on-time of the first detection module added by the timer in real time, that is to say, During the working period of the gas detection device, the timer keeps counting, and the storage module keeps reading the opening time added by the timer. After judging that the added opening time is greater than or equal to 24 hours, the timer starts counting the opening time again from zero. .

In step S201, the first threshold value is preset and stored in the storage module. The first threshold value can be set according to the service life of the sensor of the gas detection device or the like. For example, the service life of the semiconductor sensor is about 3-5 years, etc. Optionally, the first threshold may be set to 3 years, 4 years, or 5 years, etc.

As shown in FIG. 4 , further, since the accumulated duration is recorded in days, the accumulated duration can be converted into accumulated years. For example, the accumulated duration can include accumulated days, and accumulated days can be converted into accumulated years. Or set the first threshold to a value in days corresponding to 3 years or 4 years or 5 years.

In step S301, the processing module determines whether the accumulated duration stored in the storage module is greater than or equal to the first threshold. If it is determined that the first accumulated duration is greater than or equal to the first threshold, step S401 is performed. If the threshold value is reached, the process of the control method of the gas detection device ends, and the next process is performed, and this cycle is performed.

In step S301, when the accumulated duration is greater than or equal to a preset first threshold, it can be determined that the first detection module has reached the service life, and the first detection module is not in the working mode. Therefore, the first detection module is made to enter the closed state, so that gas concentration collection is no longer performed, and the second detection module enters the open state, and the gas concentration collection is performed to ensure the accuracy of gas concentration detection, thereby ensuring the gas detection device. effectiveness and safety of air-conditioning systems.

Specifically, in step S301, the first switch is controlled to be disconnected, so that the first detection module is disconnected from the electrical connection with the power module, and no longer supplies power to the first detection module, so as to Energy is saved, and the second switch is controlled to be closed, so as to electrically connect the second detection module and the power module.

It can be seen that when the first detection module reaches the service life, the first detection module is no longer used, and the second detection module is switched to the on state, which is carried out by the second detection module. The gas concentration is collected, thereby increasing the service life of the gas detection device.

In this embodiment, the first detection module only refers to the detection module in the open state, and does not refer to a certain detection module. For example, in step S401, the first detection module is turned off, and the second detection module is turned on. Then the opened second detection module is used as the first detection module in the next process, and the cyclic operation of the above steps S10 , S20 , S30 and S40 is continued. And once the first detection module is controlled to be turned off in step S401, it will not be turned on again subsequently.

A possible implementation manner, the first detection module is in the open state, and the first detection module is in the working mode, the first detection module is turned off, and the second detection module is turned on at the same time, so that the first detection module and the second detection module are not at the same time. in the open state, thereby extending the life of the gas detection device. In this case, the first detection module after being turned off may be turned on again later, so that each detection module of the gas detection device will not be turned on at the same time, and can be turned on separately in time periods, ensuring that the gas detection device normal operation and extended service life.

In one possible implementation manner, the working information of the first detection module also includes the working status of the first detection module. As shown in FIG. 6 , step 20 may include the following steps: S202 , obtain the working status of the first detection module ;

Step S30 may include the following steps: S302, based on the working state of the first detection module, determine whether the first detection module is invalid;

Step S40 may include the following steps: S402 , if the first detection module fails, switch the first detection module to the off state, and simultaneously switch the second detection module from the off state to the on state.

In step S202, the working state of the first detection module includes whether to perform gas concentration collection, whether to send a gas concentration signal and whether the gas concentration signal is accurate, and the like. Obtaining the working status of the first detection module can obtain one or more of the foregoing items.

In a possible implementation manner, step S202 may include detecting whether the first detection module performs gas concentration collection, and sending the detection signal to the processing module. Optionally, the gas detection device may include a heating drive circuit, the detection module includes a semiconductor sensor, the semiconductor sensor includes a heating wire for providing a suitable working temperature for the semiconductor sensor, and the heating driving circuit is used to provide power for heating the heating wire, in step In S202, it can be determined whether the first detection module performs gas concentration collection by monitoring whether the heating driving circuit is normally powered on.

In a possible implementation manner, step S202 may include detecting whether the gas concentration signal collected by the first detection module is accurate, and sending the detection signal to the processing module. Optionally, one or more detection modules other than the first detection module can be selected to be turned on, to obtain the gas concentration signal A collected by another detection module, or to obtain the average value B of the gas concentration signals collected by several other detection modules respectively. , judging whether the gas concentration detection signal collected by the first detection module is within the appropriate range based on A or B, such as judging whether the gas concentration detection signal collected by the first detection module is within the range of 0.9A to 1.1A, or whether Within the range of 0.9B to 1.1B, if it is within this range, it is judged that the gas concentration signal collected by the first detection module is accurate; otherwise, it is not accurate. After acquiring the gas concentration signal A and the average value B, turn off one or more other detection modules for detecting whether the gas concentration signal collected by the first detection module is accurate. In this embodiment, the specific form of the working state of the first detection module is not limited to this, and the manner of acquiring the working state of the first detection module is not limited to this.

In step S202, according to the working state of the first detection module acquired in step S202, it is determined whether the first detection module is invalid (ie, it is determined whether the first detection module is in the working mode). Optionally, according to the detection signal obtained in step S202 that the first detection module is performing or not performing gas concentration collection, it is determined whether the first detection module is invalid (ie, it is determined whether the first detection module is in the working mode). If it is detected that the first detection module performs gas concentration collection, it is determined that the first detection module is not invalid (that is, it is determined that the first detection module is in the working mode), otherwise, it is invalid (that is, it is determined that the first detection module is not in the working mode). Optionally, according to whether the gas concentration acquisition signal acquired by the first detection module acquired in step S202 is accurate or inaccurate, it is determined whether the first detection module is invalid, and if it is detected that the gas concentration signal acquired by the first detection module is accurate, the first detection module is determined to be accurate. The detection module is not invalid (that is, it is judged that the first detection module is in the working mode), otherwise, it is invalid (that is, it is judged that the first detection module is not in the working mode).

Step S302 includes performing step S402 if the first detection module fails, and if the first detection module does not fail, the process ends, and the next process is performed, and this cycle is performed.

There are many situations in which the first detection module fails within its normal working life. For example, the sensor of the first detection module encounters 100% concentration of refrigerant or other characteristic gas during use, which causes the failure of the first detection module.

In one possible implementation manner, as shown in FIG. 7 , after step S10 and before step S201, the control method of the gas detection device may further include the following steps:

S106, obtaining the working state of the first detection module;

S107. According to the working state of the first detection module, determine whether the first detection module fails.

The above step S401 includes: if the first detection module fails or the accumulated duration is greater than or equal to the first threshold, switching the first detection module to the off state, and simultaneously switching the second detection module from the off state to the on state.

In step S106, the working state of the first detection module is the same as that in the above-mentioned step S202, that is, whether to collect the gas concentration, whether to transmit the gas concentration signal and whether the gas concentration signal is accurate, etc. Obtaining the working status of the first detection module may obtain one or more of the foregoing items, which will not be repeated here.

Step S107 includes performing step S401 if the first detection module fails, and if the first detection module does not fail, the process ends, and the next process is performed, and this cycle is performed.

It is worth noting that when the usage scenarios or usage requirements of the gas detection device are different, the first detection module in the control method may also refer to two or more detection modules. For example, in order to make the detection accuracy of the gas detection device higher, two types of detection modules are used. For example, one of the detection modules includes a semiconductor sensor, and the other includes an electrochemical sensor. It may include a first sub-detection module and a second sub-detection module, the accumulated duration corresponding to the first sub-detection module is the first accumulated duration, and the accumulated duration corresponding to the second sub-detection module is the second accumulated duration, which is the same as the first sub-detection module. the first threshold corresponding to the detection module is a first sub-threshold, the first threshold corresponding to the second sub-detection module is a second sub-threshold, the second detection module includes a third sub-detection module corresponding to the first sub-detection module, and A fourth sub-detection module corresponding to the second sub-detection module.

Then the control method of the gas detection device may include the following steps:

S10a, turning on the first sub-detection module, so that the first sub-detection module enters an open state;

S106a, obtaining the working state of the first sub-detection module;

S107a, according to the working state of the first sub-detection module, determine whether the first sub-detection module fails;

S201a, acquiring the first cumulative duration when the first sub-detection module is turned on;

S301a, determine whether the first accumulated duration is greater than or equal to a preset first sub-threshold;

S401a. If the failure or the first accumulated duration is greater than or equal to the first sub-threshold, switch the first sub-detection module to the off state, and simultaneously switch the third sub-detection module from the off state to the on state.

Then the control method of the gas detection device may further comprise the following steps:

S10b, turning on the second sub-detection module, so that the second sub-detection module enters an open state;

S106b, obtaining the working state of the second sub-detection module;

S107b, according to the working state of the second sub-detection module, determine whether the second sub-detection module fails;

S201b, acquiring the second cumulative duration when the second sub-detection module is turned on;

S301b, judging whether the second cumulative duration is greater than or equal to a preset second sub-threshold;

S401b, if the failure or the second accumulated duration is greater than or equal to the second sub-threshold, switch the second sub-detection module to the off state, and simultaneously switch the fourth sub-detection module from the off state to the on state.

The above-mentioned steps S10a, S106a, S107a, S201a, S301a and S401a are a complete process, which can be recorded as process a, and the process a is carried out in a loop; the above-mentioned steps S10b, S106b, S107b, S201b, S301b and S401b are a complete process , which can be recorded as process b, and process b is carried out in a loop. Process a and process b can be performed simultaneously and independently in the control method of the gas detection device.

It should be understood that when the above-mentioned first sub-detection module and the second sub-detection module are detection modules of the same type, the values of the first sub-threshold and the second sub-threshold may be the same. When the above-mentioned first sub-detection module When the second sub-detection module is a different type of detection module, the values of the first sub-threshold and the second sub-threshold may be different.

In one possible implementation manner, the method further includes:

S501, acquiring a gas concentration signal detected by a detection module;

S502, based on the gas concentration signal, send out prompt information.

For example, when the gas concentration signal is greater than the preset alarm threshold, a prompt message is issued, such as sound or light alarm, or the signal is transmitted to the controller of the air-conditioning system (such as the air-conditioning controller) by means of communication, and the control Take corresponding measures to ensure the safety of the air-conditioning system.

In the above embodiments, the involved processors may include, for example, a CPU, a DSP, a microcontroller or a digital signal processor, and may also include a GPU, an embedded neural-network process unit (Neural-network Process Units; hereinafter referred to as: NPU) and Image signal processor (Image Signal Processing; hereinafter referred to as: ISP), the processor may also include necessary hardware accelerators or logic processing hardware circuits, such as ASIC, or one or more integrated circuits for controlling the execution of the program of the technical solution of the present application circuit, etc. Furthermore, the processor may have the function of operating one or more software programs, which may be stored in a storage medium.

Embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when it runs on a computer, causes the computer to execute the programs provided by the embodiments shown in FIG. 3 to FIG. 6 of the present application. method.

The embodiments of the present application also provide a computer program product, the computer program product includes a computer program, when it runs on a computer, the computer causes the computer to execute the methods provided by the embodiments shown in FIG. 3 to FIG. 6 of the present application.

In the embodiments of the present application, "at least one" refers to one or more, and "multiple" refers to two or more. "And/or", which describes the association relationship of the associated objects, means that there can be three kinds of relationships, for example, A and/or B, which can indicate the existence of A alone, the existence of A and B at the same time, and the existence of B alone. where A and B can be singular or plural. The character "/" generally indicates that the related objects are an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, and c may represent: a, b, c, a and b, a and c, b and c or a and b and c, where a, b, c may be single, or Can be multiple.

Those of ordinary skill in the art can realize that the units and algorithm steps described in the embodiments disclosed herein can be implemented by a combination of electronic hardware, computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units can refer to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

In the several embodiments provided in this application, if any function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (Read-Only Memory; hereinafter referred to as: ROM), Random Access Memory (Random Access Memory; hereinafter referred to as: RAM), magnetic disk or optical disk and other various A medium on which program code can be stored.

The above are only specific embodiments of the present application. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application. The protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A gas detection device, comprising:

At least two detection modules (10), the detection modules (10) are used for detecting gas concentration signals, and the at least two detection modules (10) include a first detection module (11) and a second detection module (12) ;

a switching module (20) for respectively realizing the opening and closing of each of the detection modules (10);

A processing module (30), the processing module (30) and a switching module (20), the processing module (30) is used to control the switching module (20), so that the switching module (20) switches the first When a detection module (11) is switched from an on state to an off state, the switching module (20) switches the second detection module (12) from an off state to an on state.
The gas detection device according to claim 1, further comprising a power module (40), the power module (40) being electrically connected with the switching module (20), the switching module (20) being respectively connected with each of the The detection modules (10) are electrically connected, and the switching modules (20) are used to respectively realize the electrical connection and disconnection between each of the detection modules (10) and the power supply module (40).
The gas detection device according to claim 2, wherein the switching module (20) comprises at least two switching switches, the switching switches are provided in a one-to-one correspondence with the detection module (10), and each switching switch are respectively used to realize the electrical connection and disconnection between the corresponding detection module (10) and the power supply module (40);

Each switch has a closed state and an open state. When the switch is in the closed state, the corresponding detection module (10) and the power supply module (40) are electrically connected. When the switch is in an off state, the detection module (10) corresponding to the switch is disconnected from the power module (40);

The processing module (30) is used to separately control the closing and opening of each of the switching switches.
The gas detection device according to claim 1, further comprising a storage module (50), the storage module (50) is used to record the working information of each of the detection modules (10), the processing module (30) further for reading the working information recorded by the storage module (50), and controlling the switching module (20) based on the working information.
A control method of a gas detection device, the gas detection device includes at least two detection modules, and the at least two detection modules include a first detection module and a second detection module, wherein the method includes the following steps:

turning on the first detection module, so that the first detection module enters the turned-on state;

obtaining the working information of the first detection module;

Based on the working information, determine whether the first detection module is in the working mode;

If the first detection module is not in the working mode, the first detection module is switched to the off state, and the second detection module is switched from the off state to the on state at the same time.
The control method according to claim 5, wherein the working information is selected from at least one of the cumulative duration of the first detection module being in the ON state and the working state of the first detection module.
The control method of the gas detection device according to claim 5, wherein the acquiring the working information of the first detection module comprises the following steps:

Acquiring the cumulative duration that the first detection module is in an on state;

Based on the working information, judging whether the first detection module is in the working mode includes the following steps:

Determine whether the cumulative duration is greater than or equal to the first threshold;

If the first detection module is not in the working mode, then the first detection module is switched to the off state, and at the same time, the second detection module is switched from the off state to the on state, including the following steps:

If the accumulated duration is greater than or equal to the first threshold, the first detection module is switched from the on state to the off state, and the second detection module is switched from the off state to the on state at the same time.
The control method of the gas detection device according to claim 7, wherein acquiring the accumulated time duration when the first detection module is in an on state comprises the following steps:

Carry out the addition calculation of the opening time of the first detection module;

Determine whether the opening time is greater than or equal to 24 hours;

If it is greater than or equal to 24 hours, the accumulated time will be accumulated by one day, and the added on time will be reset to zero.
The control method of the gas detection device according to claim 5, wherein the acquiring the working information of the first detection module comprises the following steps:

obtaining the working state of the first detection module;

Based on the working information of the first detection module, judging whether the first detection module is in the working mode includes the following steps:

Based on the working state of the first detection module, determine whether the first detection module fails;

If the first detection module is not in the working mode, then the first detection module is switched to the off state, and at the same time, the second detection module is switched from the off state to the on state, including the following steps:

If the first detection module fails, the first detection module is switched to the off state, and the second detection module is switched from the off state to the on state at the same time.
The control method according to claim 9, wherein the acquiring the working state of the first detection module comprises the following steps:

acquiring the gas concentration signal sent by the first detection module;

The judging whether the first detection module fails based on the working state of the first detection module includes the following steps:

It is detected whether the first detection module sends the gas concentration signal, and if the first detection module does not send the gas concentration signal, it is determined that the working state is invalid.
The control method according to claim 9, wherein the acquiring the working state of the first detection module comprises the following steps:

acquiring the gas concentration signal sent by the first detection module;

The judging whether the first detection module fails based on the working state of the first detection module includes the following steps:

It is detected whether the gas concentration signal is accurate, and if the gas concentration signal is inaccurate, it is determined that the working state is invalid.
The control method according to claim 11, wherein the detecting whether the gas concentration signal is accurate comprises the following steps:

Obtain the reference range of gas concentration;

It is judged whether the gas concentration signal is within the gas concentration reference range, and if the gas concentration signal is not within the gas concentration reference range, the gas concentration signal is inaccurate.
The control method of the gas detection device according to claim 7, wherein after the first detection module is turned on, so that the first detection module enters the turned-on state, the data of the first detection module in the turned-on state is obtained. The following steps are also included before accumulating time:

obtaining the working state of the first detection module;

According to the working state of the first detection module, determine whether the first detection module fails;

If the first detection module fails, the first detection module is switched to the off state, and the second detection module is switched from the off state to the on state at the same time.
The control method for a gas detection device according to any one of claims 5 to 13, wherein when the detection module is in an on state, the detection module is in a power-on state, and when the detection module is in an off state, the detection module is in a power-off state.
A computer-readable storage medium, storing a computer program in the computer-readable storage medium, when the computer-readable storage program runs on a computer, can make the computer execute the following control method:

turning on the first detection module, so that the first detection module enters the turned-on state;

obtaining the working information of the first detection module;

Based on the working information, determine whether the first detection module is in the working mode;

If the first detection module is not in the working mode, the first detection module is switched to the off state, and the second detection module is switched from the off state to the on state at the same time.