Combined harmful gas purification and oxygen concentration regulation and control system and control method thereof

Abstract

The invention discloses a combined harmful gas purification and oxygen concentration regulation and control system which comprises a box body, a power supply module, a detection module used for sensing and displaying indoor gas concentration and a working module used for judging and regulating and controlling the gas concentration through a threshold value, and the power supply module is used for supplying power to the detection module and the working module. A detailed and complete harmful gas and oxygen concentration regulation and control strategy is provided, the ammonia gas concentration, the hydrogen sulfide concentration, the carbon dioxide concentration and the oxygen concentration in the air are detected, and after the ammonia gas concentration, the hydrogen sulfide concentration, the carbon dioxide concentration and the oxygen concentration exceed regulation threshold values, the required adsorption and purification time, the calcium hydroxide particle filler number and the oxygen supplement amount are calculated respectively; and the air quality regulation is further guided. Besides, through the integrated design of the oxygen regeneration unit, the carbon dioxide purification unit and the harmful gas purification unit, the technical problems that in the prior art, the air filtering function aims at filtering granular impurities, and the concentration of harmful gas such as ammonia gas and hydrogen sulfide cannot be regulated and controlled are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of air quality monitoring, and more specifically, relates to a combined harmful gas purification and oxygen concentration control system and a control method thereof. Background Art

[0002] When working in a confined space, in order to ensure the safety of operators, it is necessary to control the content of harmful gases, carbon dioxide and oxygen, and ensure that the amount of harmful gases and carbon dioxide is within a safe range to ensure the air quality in the confined space. Therefore, the research and development of gas purification devices and oxygen supply equipment is of great significance to people's health.

[0003] In order to solve the above technical problems, Chinese utility model patent CN212057548U discloses a simple oxygen-enriched air purifier, including an air intake duct, an adsorption unit, an oxygen-enriched unit, a humidification unit and an air outlet duct. The air intake duct leads to the air storage compartment at the bottom of the adsorption unit, and a first air check valve and an air supply assembly are provided at the connection point. The adsorption unit is adjacent to the oxygen-enriched unit and is separated from the oxygen-enriched unit by a top plate. The oxygen-enriched unit and the adsorption unit are arranged side by side on one side of the humidification unit and are separated from the humidification unit by a side plate. The air outlet duct is connected to the oxygen-enriched unit, and a second air check valve is provided at the connection point. The utility model effectively combines an air purifier and a humidifier, and uses sodium peroxide to generate oxygen. It is suitable for places such as gyms where oxygen supply is insufficient and odor removal is required; it can be used in two ways: an external power supply and manual mechanical operation, and can also be connected to fitness equipment such as treadmills, spinning bikes, etc. to provide power. In addition, Chinese invention patent CN112902363A discloses an intelligent air purification device, comprising a housing (1), wherein the housing (1) is provided with an air outlet (2) at the bottom and a top cover (3) at the top, wherein the top cover (3) is provided with a first air inlet (4) and a second air inlet (5), wherein the first air inlet (4) is provided with a first solenoid valve (6) and is connected to the outside through a pipe (8), wherein an air intake temperature sensor (9) is provided in the pipe (8), wherein the second air inlet (5) is provided with a second solenoid valve (7), wherein an indoor temperature sensor (13), an indoor oxygen concentration sensor (15) and a controller (16) are provided outside the housing (1), wherein a plurality of air purification pads, a negative ion generator (21) and a suction fan (22) are provided inside the housing (1). The device can ensure indoor air quality and temperature, and can be automatically controlled according to indoor temperature, oxygen concentration, etc., and has good adaptability.

[0004] The above patented technologies all achieve improved air quality by combining air filtration devices with oxygen supply equipment, but the following technical problems still exist: (1) The air filtration functions in the above technical solutions are all aimed at filtering particulate impurities, and none of them can achieve the regulation of the concentration of harmful gases such as ammonia and hydrogen sulfide; (2) The technical solutions of the above solutions are relatively complex and can be further optimized from the perspective of simplifying the structural solution and reducing the overall volume to meet the applicability in limited space environments; (3) The above patented technologies do not record a detailed and complete regulation strategy for harmful gases and oxygen supply, which is not conducive to the stable and effective implementation of the equipment solution. Summary of the invention

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a combined harmful gas purification and oxygen concentration control system and a control method thereof. The present invention provides a detailed and complete control strategy for harmful gas and oxygen supply. By detecting the ammonia concentration, hydrogen sulfide concentration, carbon dioxide concentration and oxygen concentration in the air respectively, when the oxygen concentration exceeds the preset oxygen adjustment threshold, the amount of oxygen to be supplemented is calculated, so that oxygen is supplied according to the amount of oxygen to be supplemented, and the oxygen concentration in the environment is adjusted; when the carbon dioxide concentration exceeds the preset carbon dioxide adjustment threshold, the amount of calcium hydroxide particle filler to be filled in the calcium hydroxide medicine tank body is calculated, and the calcium hydroxide particles are filled into the calcium hydroxide medicine tank body according to the amount of calcium hydroxide particle filler to be filled, so as to adjust the carbon dioxide concentration in the environment; when the ammonia concentration or the hydrogen sulfide concentration exceeds the preset ammonia adjustment threshold and the hydrogen sulfide adjustment threshold, the purification efficiency of the adsorption device is calculated to determine the adsorption purification time, and the harmful gas purification mode can be automatically turned on through the automatic adjustment mode, and the third fan is controlled to be turned on to reach the adsorption purification time, so as to complete the adjustment of the ammonia concentration and the hydrogen sulfide concentration in the environment. The invention solves the problem in the prior art that when multiple machines are used for a long time at the same time, both the machine purchase cost and the energy consumption cost increase accordingly.

[0006] In order to achieve the above object, according to a first aspect of the present invention, a combined harmful gas purification and oxygen concentration control system comprises:

[0007] A box placed on the ground, a power supply module fixed inside the box, a detection module for sensing and displaying indoor gas concentration, and a working module for judging and regulating gas concentration through a threshold value, wherein the power supply module is used to supply power to the detection module and the working module;

[0008] The detection module includes a gas concentration sensor for sensing and measuring gas concentration, and a human-computer interface for displaying gas concentration and setting a concentration safety threshold;

[0009] The working module includes a main control unit for judging whether the gas concentration reaches the safety threshold and controlling the start and stop state of the concentration control execution unit; wherein the concentration control execution unit includes an oxygen regeneration unit for generating oxygen, a carbon dioxide purification unit for absorbing carbon dioxide gas, and a harmful gas purification unit for absorbing harmful gases;

[0010] The oxygen regeneration unit includes an oxygen supply device and a first fan that increases the air flow intensity around the oxygen supply device; the carbon dioxide purification unit includes a carbon dioxide purification device and a second fan that increases the air flow intensity around the carbon dioxide purification device; the harmful gas purification unit includes an adsorption device that adsorbs harmful gases and a third fan that increases the air flow intensity around the adsorption device.

[0011] Preferably, the gas concentration sensor comprises:

[0012] Ammonia sensor, hydrogen sulfide sensor, carbon dioxide sensor and oxygen sensor, which are used to sense the concentration of ammonia, hydrogen sulfide gas, carbon dioxide gas and oxygen respectively;

[0013] The output ends of the ammonia sensor, hydrogen sulfide sensor, carbon dioxide sensor and oxygen sensor are connected to the input end of the main control unit.

[0014] Preferably, the power supply module includes:

[0015] A conventional power supply unit for converting input voltage and outputting it, and an emergency power supply unit connected to the output end of the conventional power supply unit and having an energy storage function; the emergency power supply unit is used to maintain normal power supply when the conventional power supply unit is in an abnormal state.

[0016] Preferably, the oxygen supply equipment comprises:

[0017] An oxygen candle base fixedly connected to the box, and an oxygen candle body arranged on the oxygen candle base for generating oxygen;

[0018] The oxygen candle body includes an oxygen-generating medicine block, a burner that decomposes the oxygen-generating medicine block through heat and causes it to produce oxygen, a starting device that controls the start and stop states of the burner, and an oxygen filter material used to filter the oxygen produced by the oxygen-generating medicine block.

[0019] Preferably, the oxygen filter material comprises:

[0020] Chlorine inhibitor, activated carbon adsorption material.

[0021] Preferably, the carbon dioxide purification device comprises:

[0022] A calcium hydroxide medicine tank body, a calcium hydroxide particle filler filled in the calcium hydroxide medicine tank body, and the second fan is used to drive the air flow around the calcium hydroxide medicine tank body;

[0023] The calcium hydroxide medicine tank body is assembled from porous ventilation plates.

[0024] Preferably, the adsorption device comprises:

[0025] A multi-channel carrier fixedly connected to the box body, and an activated carbon adsorption layer coated on the inner wall of the convection channel of the multi-channel carrier, wherein the activated carbon adsorption layer is used to adsorb ammonia and hydrogen sulfide gas.

[0026] Preferably, the multi-channel carrier is a corrugated paper body.

[0027] According to a second aspect of the present invention, a control method of a combined harmful gas purification and oxygen concentration control system comprises the following steps:

[0028] S100: Start the equipment, set the ammonia concentration, hydrogen sulfide concentration, carbon dioxide concentration and oxygen concentration adjustment thresholds through the human-machine interface, and complete the initial parameter setting of the system;

[0029] S200: The system detects the ammonia concentration, hydrogen sulfide concentration, carbon dioxide concentration and oxygen concentration in the air; and outputs the ammonia concentration data, hydrogen sulfide concentration data, carbon dioxide concentration data and oxygen concentration data, and displays them to the human-computer interface;

[0030] S300: Analyze and determine whether the ammonia concentration, hydrogen sulfide concentration, carbon dioxide concentration, and oxygen concentration exceed a preset ammonia adjustment threshold, a hydrogen sulfide adjustment threshold, a carbon dioxide adjustment threshold, and an oxygen adjustment threshold;

[0031] S400: When the gas concentration exceeds the adjustment threshold, the gas concentration is regulated by manually or automatically controlling the working module.

[0032] Preferably, the step S400 further includes:

[0033] S401: When the oxygen concentration is lower than the preset oxygen adjustment threshold in the automatic adjustment mode, the amount of oxygen to be supplemented is calculated by the following formula:

[0034] V1=V(C1-C2)

[0035] Wherein, V is the volume of the space that needs to be supplemented with oxygen, and C1-C2 is the decrease in the percentage of oxygen content; then, the main control unit automatically turns on the oxygen adjustment mode, so that the oxygen supply equipment is used to supply oxygen according to the amount of oxygen that needs to be supplemented, thereby adjusting the oxygen concentration in the regulated environment;

[0036] S402: When the automatic adjustment mode is used, when the carbon dioxide concentration is higher than the preset carbon dioxide adjustment threshold, the amount of calcium hydroxide particle filler that needs to be filled in the calcium hydroxide medicine tank is calculated by the following formula:

[0037]

[0038] Wherein, M1 is the mass of calcium hydroxide, M2 is the mass of carbon dioxide, and X is the absorption rate of calcium hydroxide to carbon dioxide; subsequently, the main control unit automatically turns on the carbon dioxide adjustment mode, fills the required amount of calcium hydroxide particles into the calcium hydroxide medicine tank through the loading structure, and starts the carbon dioxide purification device to complete the carbon dioxide concentration adjustment;

[0039] S403: When the automatic adjustment mode is used, when the ammonia concentration or the hydrogen sulfide concentration exceeds the preset ammonia adjustment threshold and the hydrogen sulfide adjustment threshold, the adsorption purification time t is calculated by the following formula: on :

[0040] t on =Δ vis ×E

[0041] Among them, Δ vis is the concentration difference between the ammonia concentration or hydrogen sulfide concentration and the adjustment threshold, E is the purification efficiency, and E = η s -η, where η s and η are the total attenuation rate and the natural attenuation rate, respectively, and are calculated by the following formula:

[0042]

[0043]

[0044] Among them, C′ O is the initial concentration in the box, C′ t is the ammonia concentration or hydrogen sulfide concentration of the adsorption device at time t, C O is the initial concentration without adsorption device in the box, C t It is the ammonia concentration or hydrogen sulfide concentration at time t when there is an adsorption device in the box; then, the main control unit automatically turns on the harmful gas purification mode, thereby controlling the start of the third fan, and the controller running time is equal to the adsorption purification time, so as to realize the regulation of ammonia concentration and hydrogen sulfide concentration.

[0045] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0046] 1. A combined harmful gas purification and oxygen concentration control system of the present invention provides a detailed and complete control strategy for harmful gas and oxygen supply. By detecting the ammonia concentration, hydrogen sulfide concentration, carbon dioxide concentration and oxygen concentration in the air, when the oxygen concentration exceeds the preset oxygen adjustment threshold, the amount of oxygen to be supplemented is calculated, so that oxygen can be supplied according to the amount of oxygen to be supplemented, and the oxygen concentration in the environment is adjusted; when the carbon dioxide concentration exceeds the preset carbon dioxide adjustment threshold, the amount of calcium hydroxide particle filler to be filled in the calcium hydroxide medicine tank body is calculated, and the calcium hydroxide particles are filled into the calcium hydroxide medicine tank body according to the amount of calcium hydroxide particle filler to be filled, so as to adjust the carbon dioxide concentration in the environment; when the ammonia concentration or hydrogen sulfide concentration exceeds the preset ammonia adjustment threshold and hydrogen sulfide adjustment threshold, the purification efficiency of the adsorption device is calculated to determine the adsorption purification time, and the harmful gas purification mode can be automatically turned on through the automatic adjustment mode, and the third fan can be controlled to be turned on to reach the adsorption purification time, so as to complete the adjustment of the ammonia concentration and hydrogen sulfide concentration in the environment. It solves the problem that the existing technology has a corresponding increase in both the machine purchase cost and the energy consumption cost when multiple machines are used for a long time at the same time;

[0047] 2. The combined harmful gas purification and oxygen concentration control system of the present invention integrates the oxygen regeneration unit, the carbon dioxide purification unit and the harmful gas purification unit into an integrated design, thereby solving the technical problem that the air filtration function in the prior art is only for filtering particulate impurities, but cannot achieve concentration control of harmful gases such as ammonia and hydrogen sulfide. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 A three-dimensional structural diagram of a combined harmful gas purification and oxygen concentration control system according to an embodiment of the present invention;

[0049] Figure 2 This is a framework diagram of a combined harmful gas purification and oxygen concentration control system according to an embodiment of the present invention;

[0050] Figure 3 This is a structural diagram of a calcium hydroxide medicine tank of a combined harmful gas purification and oxygen concentration control system according to an embodiment of the present invention;

[0051] Figure 4 A structural diagram of a corrugated paper body of a combined harmful gas purification and oxygen concentration control system according to an embodiment of the present invention

[0052] Figure 5 This is a hardware layout diagram of a combined harmful gas purification and oxygen concentration control system according to an embodiment of the present invention;

[0053] Figure 6This is an overall control logic diagram of a combined harmful gas purification and oxygen concentration control system according to an embodiment of the present invention;

[0054] Figure 7 A harmful gas filtration control logic diagram of a combined harmful gas purification and oxygen concentration control system according to an embodiment of the present invention;

[0055] Figure 8 This is a carbon dioxide filtration control logic diagram of a combined harmful gas purification and oxygen concentration control system according to an embodiment of the present invention;

[0056] Fig. 9 This is an oxygen concentration control logic diagram of a combined harmful gas purification and oxygen concentration control system according to an embodiment of the present invention;

[0057] Fig.10 The present invention is a flowchart of a method for using a combined harmful gas purification and oxygen concentration control system according to an embodiment of the present invention.

[0058] In all the drawings, the same figure marks represent the same technical features, specifically: 1-box body, 2-oxygen candle body, 3-oxygen candle base, 4-first fan, 5-calcium hydroxide medicine tank body, 6-second fan, 7-third fan, 8-corrugated paper body. DETAILED DESCRIPTION

[0059] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0060] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0061] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0063] like Figures 1 to 5 As shown, in an embodiment of the present invention, the combined harmful gas purification and oxygen concentration control system includes:

[0064] A box 1 placed on the ground, a power supply module fixed inside the box 1, a detection module for sensing and displaying indoor gas concentration, and a working module for judging and regulating gas concentration through a threshold value, wherein the power supply module is used to supply power to the detection module and the working module;

[0065] The detection module includes a gas concentration sensor for sensing and measuring gas concentration, and a human-computer interface for displaying gas concentration and setting a concentration safety threshold;

[0066] The working module includes a main control unit for judging whether the gas concentration reaches the safety threshold and controlling the start and stop state of the concentration control execution unit; wherein the concentration control execution unit includes an oxygen regeneration unit for generating oxygen, a carbon dioxide purification unit for absorbing carbon dioxide gas, and a harmful gas purification unit for absorbing harmful gases;

[0067] The oxygen regeneration unit includes an oxygen supply device and a first fan 4 for increasing the air flow intensity around the oxygen supply device; the carbon dioxide purification unit includes a carbon dioxide purification device and a second fan 6 for increasing the air flow intensity around the carbon dioxide purification device; the harmful gas purification unit includes an adsorption device for adsorbing harmful gases and a third fan 7 for increasing the air flow intensity around the adsorption device.

[0068] like Figures 1 to 5 As shown, in an embodiment of the present invention, the gas concentration sensor includes:

[0069] Ammonia sensor, hydrogen sulfide sensor, carbon dioxide sensor and oxygen sensor, which are used to sense the concentration of ammonia, hydrogen sulfide, carbon dioxide and oxygen respectively;

[0070] The output ends of the ammonia sensor, hydrogen sulfide sensor, carbon dioxide sensor and oxygen sensor are connected to the input end of the main control unit.

[0071] like Figures 1 to 5 As shown, in an embodiment of the present invention, the power supply module includes:

[0072] A conventional power supply unit for converting input voltage and outputting it, and an emergency power supply unit connected to the output end of the conventional power supply unit and having an energy storage function; the emergency power supply unit is used to maintain normal power supply when the conventional power supply unit is in an abnormal state.

[0073] like Figures 1 to 5 As shown, in an embodiment of the present invention, the oxygen supply equipment includes:

[0074] An oxygen candle base 3 fixedly connected to the box body 1, and an oxygen candle body 2 disposed on the oxygen candle base 3 for generating oxygen;

[0075] The oxygen candle body 2 includes an oxygen-generating medicine block, a burner that decomposes the oxygen-generating medicine block by heat and causes it to produce oxygen, a starting device that controls the start and stop state of the burner, and an oxygen filter material for filtering the oxygen produced by the oxygen-generating medicine block.

[0076] like Figures 1 to 5 As shown, in an embodiment of the present invention, the oxygen filter material includes:

[0077] Chlorine inhibitor, activated carbon adsorption material.

[0078] like Figures 1 to 5 As shown, in an embodiment of the present invention, the carbon dioxide purification device includes:

[0079] A calcium hydroxide medicine tank body 5, a calcium hydroxide particle filler filled in the calcium hydroxide medicine tank body 5, and the second fan 6 is used to drive the air flow around the calcium hydroxide medicine tank body 5;

[0080] The calcium hydroxide medicine tank body 5 is assembled from porous ventilation plates.

[0081] like Figures 1 to 5 As shown, in an embodiment of the present invention, the adsorption device includes:

[0082] A multi-channel carrier fixedly connected to the housing 1 and an activated carbon adsorption layer coated on the inner wall of the convection channel of the multi-channel carrier, wherein the activated carbon adsorption layer is used for adsorbing ammonia and hydrogen sulfide gas.

[0083] like Figures 1 to 5 As shown, in the embodiment of the present invention, the multi-channel carrier is a corrugated paper body 8.

[0084] like Figures 1 to 9 As shown, in an embodiment of the present invention, a combined harmful gas purification and oxygen concentration control system and a control method thereof include the following steps:

[0085] S100: Start the equipment, set the ammonia concentration, hydrogen sulfide concentration, carbon dioxide concentration and oxygen concentration adjustment thresholds through the human-machine interface, and complete the initial parameter setting of the system;

[0086] S200: The system detects the ammonia concentration, hydrogen sulfide concentration, carbon dioxide concentration and oxygen concentration in the air; and outputs the ammonia concentration data, hydrogen sulfide concentration data, carbon dioxide concentration data and oxygen concentration data, and displays them to the human-computer interface;

[0087] S300: Analyze and determine whether the ammonia concentration, hydrogen sulfide concentration, carbon dioxide concentration, and oxygen concentration exceed a preset ammonia adjustment threshold, a hydrogen sulfide adjustment threshold, a carbon dioxide adjustment threshold, and an oxygen adjustment threshold;

[0088] S400: When the gas concentration exceeds the adjustment threshold, the gas concentration is regulated by manually or automatically controlling the working module.

[0089] The step S400 further includes:

[0090] S401: When the oxygen concentration is lower than the preset oxygen adjustment threshold in the automatic adjustment mode, the amount of oxygen to be supplemented is calculated by the following formula:

[0091] V1=V(C1-C2)

[0092] Wherein, V is the volume of the space that needs to be supplemented with oxygen, and C1-C2 is the decrease in the percentage of oxygen content; then, the main control unit automatically turns on the oxygen adjustment mode, so that the oxygen supply equipment is used to supply oxygen according to the amount of oxygen that needs to be supplemented, thereby adjusting the oxygen concentration in the regulated environment;

[0093] S402: When the automatic adjustment mode is used, when the carbon dioxide concentration is higher than the preset carbon dioxide adjustment threshold, the amount of calcium hydroxide particle filler that needs to be filled in the calcium hydroxide medicine tank body 5 is calculated by the following formula:

[0094]

[0095] Wherein, M1 is the mass of calcium hydroxide, M2 is the mass of carbon dioxide, and X is the absorption rate of calcium hydroxide to carbon dioxide; subsequently, the main control unit automatically turns on the carbon dioxide adjustment mode, fills the required amount of calcium hydroxide particles into the calcium hydroxide medicine tank 5 through the loading structure, and starts the carbon dioxide purification device to complete the carbon dioxide concentration adjustment;

[0096] S403: When the automatic adjustment mode is used, when the ammonia concentration or the hydrogen sulfide concentration exceeds the preset ammonia adjustment threshold and the hydrogen sulfide adjustment threshold, the adsorption purification time t is calculated by the following formula: on :

[0097] t on =Δ vis ×E

[0098] Among them, Δ vis is the concentration difference between the ammonia concentration or hydrogen sulfide concentration and the adjustment threshold, E is the purification efficiency, and E = η s -η, where η s and η are the total attenuation rate and the natural attenuation rate, respectively, and are calculated by the following formula:

[0099]

[0100]

[0101] Among them, C′ O is the initial concentration in box 1, C′ t is the ammonia concentration or hydrogen sulfide concentration of the adsorption device at time t, C O is the initial concentration without adsorption device in box 1, C t It is the ammonia concentration or hydrogen sulfide concentration at time t when there is an adsorption device in the box 1; then, the main control unit automatically turns on the harmful gas purification mode, thereby controlling the start of the third fan 7, and the controller operation time is equal to the adsorption purification time, so as to realize the regulation of the ammonia concentration and the hydrogen sulfide concentration.

[0102] It is necessary to explain that, in this embodiment, the ammonia adjustment threshold is less than 0.29ppm; the hydrogen sulfide adjustment threshold is less than 0.22ppm; the carbon dioxide adjustment threshold is less than 2000ppm; the oxygen adjustment threshold is greater than 20%;

[0103] In an embodiment of the present invention, in the manual adjustment mode, the concentration threshold judgment result can be used as a reference, and then the oxygen regeneration unit, carbon dioxide purification unit and harmful gas purification unit in the working module are manually started to complete the harmful gas and oxygen concentration control.

[0104] In the embodiment of the present invention, a detailed and complete control strategy for harmful gas and oxygen supply is provided, and the ammonia concentration, hydrogen sulfide concentration, carbon dioxide concentration and oxygen concentration in the air are detected respectively, so that when the oxygen concentration exceeds the preset oxygen adjustment threshold, the amount of oxygen to be supplemented is calculated, so that oxygen is supplied according to the amount of oxygen to be supplemented, and the oxygen concentration in the environment is adjusted; when the carbon dioxide concentration exceeds the preset carbon dioxide adjustment threshold, the number of calcium hydroxide particle fillers to be filled in the calcium hydroxide medicine tank body is calculated, and the calcium hydroxide particles are filled into the calcium hydroxide medicine tank body according to the number of calcium hydroxide particle fillers to be filled, so as to adjust the carbon dioxide concentration in the environment; when the ammonia concentration or hydrogen sulfide concentration exceeds the preset ammonia adjustment threshold and hydrogen sulfide adjustment threshold, the purification efficiency of the adsorption device is calculated to determine the adsorption purification time, and the harmful gas purification mode can be automatically turned on by the automatic adjustment mode, and the third fan is controlled to be turned on to reach the adsorption purification time, so as to complete the adjustment of the ammonia concentration and hydrogen sulfide concentration in the environment. The problem that the existing technology simultaneously uses multiple machines for a long time, and the machine purchase cost and energy consumption cost are correspondingly increased is solved.

[0105] In addition, the present invention solves the technical problem that the air filtration functions in the prior art are all for filtering particulate impurities, but cannot achieve concentration control of harmful gases such as ammonia and hydrogen sulfide, by integrating the oxygen regeneration unit, carbon dioxide purification unit and harmful gas purification unit into an integrated design.

[0106] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A combined harmful gas purification and oxygen concentration control system, characterized in that: include: A box (1) placed on four pulleys, a power supply module fixed inside the box (1), a detection module for sensing and displaying indoor gas concentration, and a working module for judging and regulating gas concentration through a threshold value, wherein the power supply module is used to supply power to the detection module and the working module; The detection module includes a gas concentration sensor for sensing and measuring gas concentration, and a human-computer interface for displaying gas concentration and setting a concentration safety threshold; The working module includes a main control unit for judging whether the gas concentration reaches the safety threshold and controlling the start and stop state of the concentration control execution unit; wherein the concentration control execution unit includes an oxygen regeneration unit for generating oxygen, a carbon dioxide purification unit for absorbing carbon dioxide gas, and a harmful gas purification unit for absorbing harmful gases; The oxygen regeneration unit comprises an oxygen supply device and a first fan (4) for increasing the air flow intensity around the oxygen supply device; the carbon dioxide purification unit comprises a carbon dioxide purification device and a second fan (6) for increasing the air flow intensity around the carbon dioxide purification device; the harmful gas purification unit comprises an adsorption device for adsorbing harmful gases and a third fan (7) for increasing the air flow intensity around the adsorption device.

2. A combined harmful gas purification and oxygen concentration control system according to claim 1, characterized in that: The gas concentration sensor comprises: Ammonia sensor, hydrogen sulfide sensor, carbon dioxide sensor and oxygen sensor, which are used to sense the concentration of ammonia, hydrogen sulfide gas, carbon dioxide gas and oxygen respectively; The output ends of the ammonia sensor, hydrogen sulfide sensor, carbon dioxide sensor and oxygen sensor are connected to the input end of the main control unit.

3. A combined harmful gas purification and oxygen concentration control system according to any one of claims 1 or 2, characterized in that: The power supply module comprises: A conventional power supply unit for converting input voltage and outputting it, and an emergency power supply unit connected to the output end of the conventional power supply unit and having an energy storage function; the emergency power supply unit is used to maintain normal power supply when the conventional power supply unit is in an abnormal state.

4. A combined harmful gas purification and oxygen concentration control system according to claim 1, characterized in that: The oxygen supply equipment comprises: An oxygen candle base (3) fixedly connected to the box (1), and an oxygen candle body (2) disposed on the oxygen candle base (3) and used for generating oxygen; The oxygen candle body (2) comprises an oxygen-generating medicine block, a burner for decomposing the oxygen-generating medicine block by heat and causing it to generate oxygen, a starting device for controlling the start and stop state of the burner, and an oxygen filter material for filtering the oxygen generated by the oxygen-generating medicine block.

5. A combined harmful gas purification and oxygen concentration control system according to claim 4, characterized in that: The oxygen filter material comprises: Chlorine inhibitor, activated carbon adsorption material.

6. A combined harmful gas purification and oxygen concentration control system according to claim 1, characterized in that: The carbon dioxide purification device comprises: A calcium hydroxide medicine tank body (5), a calcium hydroxide particle filler filled in the calcium hydroxide medicine tank body (5), and the second fan (6) is used to drive the air flow around the calcium hydroxide medicine tank body (5); The calcium hydroxide medicine tank body (5) is assembled from porous ventilation plates.

7. A combined harmful gas purification and oxygen concentration control system according to claim 1, characterized in that: The adsorption device comprises: A multi-channel carrier fixedly connected to the housing (1), and an activated carbon adsorption layer coated on the inner wall of the convection channel of the multi-channel carrier, wherein the activated carbon adsorption layer is used to adsorb ammonia and hydrogen sulfide gas.

8. A combined harmful gas purification and oxygen concentration control system according to claim 7, characterized in that: The multi-channel carrier is a corrugated paper body (8).

9. A control method for a combined harmful gas purification and oxygen concentration control system, characterized in that: The steps include: S100: Start the equipment, set the ammonia concentration, hydrogen sulfide concentration, carbon dioxide concentration and oxygen concentration adjustment thresholds through the human-machine interface, and complete the initial parameter setting of the system; S200: The system detects the ammonia concentration, hydrogen sulfide concentration, carbon dioxide concentration and oxygen concentration in the air; and outputs the ammonia concentration data, hydrogen sulfide concentration data, carbon dioxide concentration data and oxygen concentration data, and displays them to the human-computer interface; S300: Analyze and determine whether the ammonia concentration, hydrogen sulfide concentration, carbon dioxide concentration, and oxygen concentration exceed a preset ammonia adjustment threshold, a hydrogen sulfide adjustment threshold, a carbon dioxide adjustment threshold, and an oxygen adjustment threshold; S400: When the gas concentration exceeds the adjustment threshold, the gas concentration is regulated by manually or automatically controlling the working module.

10. The control method of a combined harmful gas purification and oxygen concentration control system according to claim 9, characterized in that: The step S400 further includes: S401: When the automatic adjustment mode is used, when the oxygen concentration is lower than the preset oxygen adjustment threshold, the amount of oxygen to be supplemented is calculated by the following formula: V1=V(C1-C2) Wherein, V is the volume of the space that needs to be supplemented with oxygen, and C1-C2 is the decrease in the percentage of oxygen content; then, the main control unit automatically turns on the oxygen adjustment mode, so that the oxygen supply equipment is used to supply oxygen according to the amount of oxygen that needs to be supplemented, thereby adjusting the oxygen concentration in the regulated environment; S402: When the automatic adjustment mode is used, when the carbon dioxide concentration is higher than the preset carbon dioxide adjustment threshold, the amount of calcium hydroxide particle filler that needs to be filled in the calcium hydroxide medicine tank (5) is calculated by the following formula: Wherein, M1 is the mass of calcium hydroxide, M2 is the mass of carbon dioxide, and X is the absorption rate of calcium hydroxide to carbon dioxide; subsequently, the main control unit automatically starts the carbon dioxide adjustment mode, fills the required amount of calcium hydroxide particles into the calcium hydroxide medicine tank (5) through the loading structure, and starts the carbon dioxide purification device to complete the carbon dioxide concentration adjustment; S403: When the automatic adjustment mode is used, when the ammonia concentration or the hydrogen sulfide concentration exceeds the preset ammonia adjustment threshold and the hydrogen sulfide adjustment threshold, the adsorption purification time t is calculated by the following formula: on : t on =D vis ×E Among them, Δ vis is the concentration difference between the ammonia concentration or hydrogen sulfide concentration and the adjustment threshold, E is the purification efficiency, and E = η s -η, where η s and η are the total attenuation rate and the natural attenuation rate, respectively, and are calculated by the following formula: Wherein, C′o is the initial concentration in the box (1), C′t is the ammonia concentration or hydrogen sulfide concentration of the adsorption device at time t, Co is the initial concentration in the box (1) without the adsorption device, and Ct is the ammonia concentration or hydrogen sulfide concentration in the box (1) with the adsorption device at time t; subsequently, the main control unit automatically turns on the harmful gas purification mode, thereby controlling the third fan (7) to start, and controlling the operating time of the controller to be equal to the adsorption purification time, thereby achieving the regulation of the ammonia concentration and the hydrogen sulfide concentration.

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