CN113264501B - Hydrogen concentration control method and system - Google Patents
Hydrogen concentration control method and system Download PDFInfo
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- CN113264501B CN113264501B CN202110537976.2A CN202110537976A CN113264501B CN 113264501 B CN113264501 B CN 113264501B CN 202110537976 A CN202110537976 A CN 202110537976A CN 113264501 B CN113264501 B CN 113264501B
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 235
- 239000001257 hydrogen Substances 0.000 title claims abstract description 230
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 230
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 claims abstract description 81
- 238000001514 detection method Methods 0.000 claims abstract description 26
- 239000007789 gas Substances 0.000 claims description 36
- 239000002274 desiccant Substances 0.000 claims description 8
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000009920 food preservation Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/04—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of inorganic compounds, e.g. ammonia
- C01B3/042—Decomposition of water
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
- A23L3/34—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals
- A23L3/3409—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor
- A23L3/3445—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor in a controlled atmosphere comprising other gases in addition to CO2, N2, O2 or H2O
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P3/00—Vehicles adapted to transport, to carry or to comprise special loads or objects
- B60P3/20—Refrigerated goods vehicles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/042—Air treating means within refrigerated spaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/005—H2
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display
- G01N33/0063—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display using a threshold to release an alarm or displaying means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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- Life Sciences & Earth Sciences (AREA)
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- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
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- General Chemical & Material Sciences (AREA)
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- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Hydrogen, Water And Hydrids (AREA)
Abstract
The invention provides a hydrogen concentration control method and a hydrogen concentration control system, relates to the technical field of cold chain transportation equipment, and aims to improve the safety of using hydrogen in a refrigerating chamber for fresh keeping. The hydrogen concentration control method comprises hydrogen concentration detection control and time judgment control, wherein the hydrogen concentration detection control comprises the following contents: detecting the hydrogen concentration in the refrigerating chamber, and controlling the hydrogen production equipment to stop running when the concentration value exceeds a preset value; the time determination control includes the following: and when the working time of the hydrogen production equipment is greater than the preset time value, controlling the hydrogen production equipment to stop working. The invention is used for improving the safety of using hydrogen in the refrigerating chamber.
Description
Technical Field
The invention relates to the technical field of cold chain transportation equipment, in particular to a hydrogen concentration control method and a hydrogen concentration control system.
Background
Scientific research in recent years finds that hydrogen has a better effect on food preservation than inert gas. Therefore, a proper amount of hydrogen is added into a refrigerating chamber of a refrigerator (a cold chain transport vehicle, a refrigerating box and the like), so that the freshness date of food can be prolonged.
At normal temperature, the hydrogen has stable performance and is not easy to generate chemical reaction with other substances. However, when the volume fraction of hydrogen gas in a certain space reaches 4.0%, explosion occurs. In view of this, the present invention provides a method for controlling hydrogen concentration when hydrogen is charged into a refrigerating chamber of a refrigerator (cold chain carrier, refrigerator, etc.), according to which the safety of hydrogen use can be ensured.
Disclosure of Invention
The invention aims to provide a hydrogen concentration control method and a hydrogen concentration control system, which are used for improving the safety of using hydrogen in a refrigerating chamber for fresh keeping. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.
In order to achieve the purpose, the invention provides the following technical scheme:
an object of the present invention is to provide a hydrogen concentration control method, including hydrogen concentration detection control and time determination control, wherein the hydrogen concentration detection control includes the following: detecting the hydrogen concentration in the refrigerating chamber, and controlling the hydrogen production equipment to stop running when the concentration value exceeds a preset value; the time determination control includes the following: and when the working time of the hydrogen production equipment is greater than a preset time value, controlling the hydrogen production equipment to stop working.
Further, the hydrogen concentration detection control is specifically as follows: when the primary gas sensor detects that the hydrogen concentration value in the refrigerating chamber reaches A1, the hydrogen production equipment stops working, otherwise, the hydrogen production equipment continues working;
when the hydrogen production equipment works and reaches the set workpiece time2, the secondary gas sensor starts to detect the hydrogen concentration value in the refrigerating chamber, and when the detected hydrogen concentration value reaches A2, the hydrogen production equipment stops working; wherein, A1 is more than or equal to 3 percent and A2 is less than 4 percent, and time2 is the theoretical time needed when the hydrogen concentration in the refrigerating chamber reaches A1.
Further, the time determination control is specifically as follows: when the hydrogen production equipment works and the hydrogen production equipment reaches the set workpiece time3, the hydrogen production equipment stops working; wherein, time3 is the theoretical time required for the hydrogen concentration in the refrigerating chamber to reach A2.
Further, the value range of A1 is more than or equal to 3% and A1 is less than 3.2%; the value range of A2 is 3% < A2 ≤ 3.2%.
Further, in the hydrogen production process, when the box door is opened, the hydrogen production equipment stops working, the box door external gas sensor detects the hydrogen concentration value, and if the hydrogen concentration value reaches a preset concentration value A1, an alarm is given out and ventilation is reminded.
Further, when the box door is closed and the low-level floating ball in the hydrogen production equipment floats, the hydrogen production equipment is started to supply hydrogen to the refrigerating chamber.
Further, hydrogen generated by the hydrogen production equipment flows to the refrigerating chamber through the hydrogen dryer, and when the service life of the hydrogen dryer reaches the normal service life N of the drying agent in the hydrogen dryer, an alarm signal is sent out to remind that the drying agent needs to be replaced.
Further, when the hydrogen production equipment is in a stop state, a pipeline between the refrigerating chamber and the hydrogen dryer is blocked, and hydrogen in a pipeline connected with the hydrogen production equipment is released.
The invention also provides a system for realizing the hydrogen concentration control method, which comprises a control module, a detection device and a timing device, wherein the control module is connected with the detection device and the timing device, the detection device is used for detecting the hydrogen concentration in the refrigerating chamber and transmitting a detected signal to the control module, and the control module can control the working condition of the hydrogen production equipment according to the signal transmitted by the detection device; the timing device is used for timing the working time of the hydrogen production device, and when the working time of the hydrogen production equipment reaches a preset time value, the control module controls the hydrogen production equipment to stop working.
Further, the detection device comprises a primary gas sensor and a secondary gas sensor, and when the primary gas sensor detects that the hydrogen concentration value in the refrigerating chamber reaches A1, the control module controls the hydrogen production equipment to stop working;
when the hydrogen production equipment works and the timing device times the work piece of the hydrogen production equipment to time2, the secondary gas sensor is started; when the secondary gas sensor detects that the hydrogen concentration value in the refrigerating chamber reaches A2, the control module controls the hydrogen production equipment to stop working;
when the hydrogen production equipment works and the timing device times the work piece of the hydrogen production equipment to time3, the control module controls the hydrogen production equipment to stop working;
wherein A1 is more than or equal to 3 percent and A2 is less than 4 percent, and time2 is the theoretical time needed when the hydrogen concentration in the refrigerating chamber reaches A1; time3 is the theoretical time required for the hydrogen concentration in the refrigerator to reach a 2.
The invention aims to provide a hydrogen concentration control method, which can control the hydrogen concentration in a refrigerating chamber by detecting the hydrogen concentration and judging the working time of hydrogen production equipment, and can ensure the use safety of hydrogen as much as possible.
The invention also provides a system for realizing the hydrogen concentration control method provided by the invention, and the safe use of the hydrogen in the refrigerating chamber can be ensured as much as possible.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a wiring schematic of a system provided by an embodiment of the present invention;
fig. 2 is a control flow chart of a hydrogen concentration control method according to an embodiment of the present invention.
FIG. 1-refrigerator freezer; 2-a refrigerator door; 3-a hydrogen drier; 4-a hydrogen generator; 5-a control module; 6-primary gas sensor; 7-a secondary gas sensor; 8-a first solenoid valve; 9-a second solenoid valve; 10-a pressure transmitter; 11-a first virtual timer; 12-a second virtual timer; 13-a third virtual timer; 14-a display; 15-an alarm; 16-lighting lamp.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
At normal temperature, the hydrogen has stable performance and is not easy to generate chemical reaction with other substances. However, when the volume fraction of hydrogen gas in a certain space reaches 4.0%, explosion occurs. In view of this, the present invention provides a hydrogen concentration control method for filling hydrogen into a refrigerating chamber of a refrigerator (e.g., a cold chain carrier, a cold storage box, etc.), which aims to avoid a single concentration control manner (e.g., only detecting the concentration of hydrogen in the refrigerating chamber) and ensure the safe use of hydrogen as much as possible.
Example 1:
the invention provides a hydrogen concentration control method, which comprises hydrogen concentration detection control and time judgment control, wherein the hydrogen concentration detection control comprises the following contents: detecting the hydrogen concentration in the refrigerating chamber, and controlling the hydrogen production equipment to stop running when the concentration value is greater than a preset value, wherein the hydrogen production equipment is a hydrogen generator 4 as shown in figure 1; the time determination control includes the following: and when the working time of the hydrogen production equipment exceeds a preset time value, controlling the hydrogen production equipment to stop working.
The hydrogen concentration detection control is specifically as follows: referring to fig. 1, when the primary gas sensor 6 detects that the hydrogen concentration value in the refrigerating chamber reaches a1, the hydrogen generator 4 stops working, otherwise, the hydrogen production equipment continues working; when the hydrogen production equipment works and reaches the set workpiece time2, the secondary gas sensor 7 starts to detect the hydrogen concentration value in the refrigerating chamber, and when the detected hydrogen concentration value reaches A2, the hydrogen production equipment stops working; wherein, A1 is more than or equal to 3 percent and A2 is less than 4 percent, time2 is the theoretical time needed when the hydrogen concentration in the refrigerating chamber reaches A1, and the value range of A1 is more than or equal to 3 percent and A1 is less than 3.2 percent; the value range of A2 is 3% < A2 ≤ 3.2%.
For example, a1 is 3%, a2 is 3.2%, when the primary gas sensor 6 detects that the hydrogen concentration value in the refrigerating chamber (refrigerating chamber 1 of the refrigerator) does not reach 3%, the hydrogen generator 4 continues to operate, and meanwhile, the display 14 displays that hydrogen production is in progress; when the primary gas sensor 6 detects that the concentration value of hydrogen in the refrigerating chamber 1 of the refrigerator reaches 3 percent (including 3 percent), controlling the hydrogen generator 4 to stop working; if the primary gas sensor 6 is damaged, the secondary gas sensor 7 is additionally arranged for improving safety, when the hydrogen generator 4 reaches a set workpiece time2, a time2 is a theoretical time required when the hydrogen concentration in the refrigerating chamber reaches 3%, the secondary gas sensor 7 starts to work, and when the secondary gas sensor 7 detects that the hydrogen concentration value in the refrigerating chamber 1 of the refrigerator reaches 3.2%, the hydrogen generator 4 is controlled to stop working.
The time determination control is specifically as follows: when the hydrogen production equipment works and the hydrogen production equipment reaches the set workpiece time3, the hydrogen production equipment stops working; wherein, time3 is the theoretical time required for the hydrogen concentration in the refrigerating chamber to reach A2.
When the primary gas sensor 6 and the secondary gas sensor 7 fail, the hydrogen generator 4 continues to operate. In order to improve the safety, time judgment control is added, when the hydrogen generator 4 reaches the set workpiece time3, the time3 is the theoretical time required when the hydrogen concentration in the refrigerating chamber reaches 3.2 percent (A2 is 3.2 percent), and the hydrogen generator 4 is controlled to stop working.
For the explanation of the preset times time2 and time3, assuming that the gas production of the hydrogen generator 4 is 350ml/min, the refrigerator volume 200L is taken as an example:
hydrogen volume: when 200Lx 3% is equal to 6L, the theoretical time set by time2 is 17.1 min.
Volume of hydrogen gas: when 200 lx3.2% ═ 6.4L, time3 set the theoretical time to 18.2 min.
As an alternative embodiment, the hydrogen generator 4 is activated for supplying hydrogen into the refrigerator compartment 2 when the door (refrigerator door 2) is closed and a low level float ball in the hydrogen generator 4 floats. That is, in the process of producing hydrogen, the hydrogen generator 4 stops working every time the refrigerator door 2 is opened; when the refrigerator door 2 is closed, the hydrogen generator 4 is automatically started.
In the hydrogen production process, when chamber door (refrigerator door 2) was opened, hydrogen manufacturing equipment stopped working, and the chamber door outer gas sensor detects the hydrogen concentration value (the hydrogen concentration value that chamber door outer gas sensor detected the refrigerator door mouth department promptly), if reach preset concentration value 3%, send the warning to remind the ventilation.
As an alternative embodiment, the hydrogen generated by the hydrogen production equipment flows to the refrigerating chamber (the refrigerator refrigerating chamber 1) through the hydrogen dryer 3, and when the service life of the hydrogen dryer 3 reaches the normal service life N of the drying agent in the hydrogen dryer, an alarm signal is sent out, and meanwhile, the need of replacing the drying agent is obviously reminded. For example, setting the age limit N to 1.5 years, when it is detected that the service life of the desiccant in the hydrogen drying unit 3 reaches 1.5 years, an alarm signal is sent, and the display 14 reminds that the desiccant needs to be replaced.
As an alternative embodiment, when the hydrogen production apparatus is in a stopped state, the pipe between the refrigerating chamber and the hydrogen dryer 3 is blocked, and hydrogen gas in the pipe connected to the hydrogen production apparatus is released. Referring to fig. 1, when the oxygen generator 4 is in a stopped state, the first solenoid valve 8 is de-energized and closed, and the second solenoid valve 9 is opened to release hydrogen gas in a pipe connected to the hydrogen generator 4.
Example 2:
referring to fig. 1, a system for implementing a hydrogen concentration control method includes a control module 5, a detection device and a timing device, wherein the control module is connected to the detection device and the timing device, the detection device is used for detecting the hydrogen concentration in a refrigerating chamber and transmitting a detected signal to the control module, and the control module can control the working condition of a hydrogen production device according to the signal transmitted by the detection device;
the timing device is used for timing the working time of the hydrogen production device, and the control module controls the hydrogen production equipment to stop working when the working time of the hydrogen production equipment reaches a preset time value.
As an alternative embodiment, the detection device comprises a primary gas sensor 6 and a secondary gas sensor 7, and when the primary gas sensor 6 detects that the hydrogen concentration value in the refrigerating chamber reaches a1(a1 may be 3%), the control module 5 controls the hydrogen generator 4 to stop working;
when the hydrogen generator 4 works and the timing device (the second virtual timer 12) times the work piece time of the hydrogen generator 4 to be time2, the secondary gas sensor 7 is started; when the secondary gas sensor 7 detects that the hydrogen concentration value in the refrigerating chamber reaches A2(A2 can be 3.2%), the control module 5 controls the hydrogen generator 4 to stop working, wherein time2 is the theoretical time required when the hydrogen concentration in the refrigerating chamber reaches 3%;
when the hydrogen generator 4 works and the timing device (third virtual timer 13) times the work piece time of the hydrogen generator 4 to be time3, the control module 5 controls the hydrogen production equipment to stop working; wherein, time3 is the theoretical time required for the hydrogen concentration in the refrigerating chamber to reach 3.2%.
Referring to fig. 1, there is illustrated a refrigerator freezer 1, a hydrogen dryer 3, a hydrogen generator 4, and a control module 5, etc.
The refrigerator door 2 is provided with a travel switch which is electrically connected with the control module 5, and the control module 5 is electrically connected with the hydrogen generator 4. When the refrigerator door 2 is closed, the hydrogen generator 4 is started, and when the refrigerator door 2 is opened, the hydrogen generator is stopped.
Referring to fig. 1, a first virtual timer 11 is shown for timing time1, i.e., the usage time of the hydrogen dryer 3.
In addition, the pressure transmitter 10 detects whether the hydrogen dryer 3 is clogged, and gives an alarm when a set value is reached.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. A hydrogen concentration control method characterized by comprising a hydrogen concentration detection control and a time determination control, wherein,
the hydrogen concentration detection control includes the following: detecting the hydrogen concentration in the refrigerating chamber, and controlling the hydrogen production equipment to stop running when the concentration value exceeds a preset value;
the time determination control includes the following: when the working time of the hydrogen production equipment is greater than a preset time value, controlling the hydrogen production equipment to stop working;
the detection control of the hydrogen concentration is specifically as follows: when the primary gas sensor detects that the hydrogen concentration value in the refrigerating chamber reaches A1, the hydrogen production equipment stops working, otherwise, the hydrogen production equipment continues working;
when the hydrogen production equipment works and reaches the set workpiece time2, the secondary gas sensor starts to detect the hydrogen concentration value in the refrigerating chamber, and when the detected hydrogen concentration value reaches A2, the hydrogen production equipment stops working;
wherein, A1 is more than or equal to 3% and A2 is less than 4%, and time2 is the theoretical time needed when the hydrogen concentration in the refrigerating chamber reaches A1.
2. The hydrogen concentration control method according to claim 1, wherein the time determination control is specifically as follows: when the hydrogen production equipment works and the hydrogen production equipment reaches the set workpiece time3, the hydrogen production equipment stops working;
wherein, time3 is the theoretical time required for the hydrogen concentration in the refrigerating chamber to reach A2.
3. The method for controlling hydrogen concentration according to claim 2, wherein a value for a1 is in a range of 3% to a1< 3.2%; the value range of A2 is more than 3% and less than or equal to 3.2% of A2.
4. The hydrogen concentration control method according to claim 1, wherein during hydrogen production, when the door is opened, the hydrogen production equipment stops working, the gas sensor outside the door detects the hydrogen concentration value, and if the hydrogen concentration value reaches a preset concentration value A1, an alarm is given and ventilation is prompted.
5. The method for controlling hydrogen concentration according to any one of claims 1 to 4, wherein the hydrogen production apparatus is activated for supplying hydrogen gas into the refrigerating chamber when the door is closed and the low level float ball in the hydrogen production apparatus floats.
6. The method for controlling the concentration of hydrogen according to any one of claims 1 to 4, wherein the hydrogen generated by the hydrogen production equipment flows to the refrigerating chamber through the hydrogen dryer, and when the service life of the hydrogen dryer reaches the normal service life N of the desiccant in the hydrogen dryer, an alarm signal is sent out to remind that the desiccant needs to be replaced.
7. The hydrogen concentration control method according to any one of claims 1 to 4, characterized in that when the hydrogen production apparatus is in a stopped state, a pipe between the refrigerating chamber and the hydrogen dryer is blocked, and hydrogen gas in a pipe connected to the hydrogen production apparatus is released.
8. A system for implementing the hydrogen concentration control method according to any one of claims 1 to 7, comprising a control module, detection means, and timing means, wherein,
the control module is connected with the detection device and the timing device, the detection device is used for detecting the hydrogen concentration in the refrigerating chamber and transmitting a detected signal to the control module, and the control module can control the working condition of the hydrogen production equipment according to the signal transmitted by the detection device;
the timing device is used for timing the working time of the hydrogen production device, and when the working time of the hydrogen production equipment reaches a preset time value, the control module controls the hydrogen production equipment to stop working.
9. The system of claim 8, wherein the detection device comprises a primary gas sensor and a secondary gas sensor, and the control module controls the hydrogen plant to stop when the primary gas sensor detects that the concentration of hydrogen in the refrigerated compartment reaches A1;
when the hydrogen production equipment works and the timing device times the work piece of the hydrogen production equipment to time2, the secondary gas sensor is started; when the secondary gas sensor detects that the concentration value of hydrogen in the refrigerating chamber reaches A2, the control module controls the hydrogen production equipment to stop working;
when the hydrogen production equipment works and the timing device times the work piece of the hydrogen production equipment to time3, the control module controls the hydrogen production equipment to stop working;
wherein A1 is more than or equal to 3% and A2 is less than 4%, and time2 is the theoretical time required when the hydrogen concentration in the refrigerating chamber reaches A1; time3 is the theoretical time required for the hydrogen concentration in the refrigerator to reach a 2.
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