Refrigerator fresh-keeping assembly, control method thereof and refrigerator
By setting up gas production components of nanocomposite carbon mesh and palladium alloy mesh in the refrigerator, actively producing high-concentration carbon dioxide gas, solving the problem of ineffective preservation in the refrigerator and achieving high-quality preservation of fruits and vegetables for a longer period of time.
Patent Information
- Application Number
- CN202411851285.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-03-07
AI Technical Summary
It is difficult for existing refrigerators to effectively preserve fruits and vegetables by actively producing carbon dioxide, and traditional methods have problems with high temperature demand and high carbon monoxide production ratio.
A refrigerator preservation component is designed, including a nanocomposite carbon mesh and a palladium alloy mesh, which catalyzes the oxidation of carbon particles through the metal mesh to generate carbon dioxide, and further purify the gas through the palladium alloy mesh to remove the incompletely oxidized gas.
It has achieved efficient production of high-concentration carbon dioxide gas at lower temperatures, effectively extending the preservation time of fruits and vegetables, and improving the preservation quality.
Smart Images
Figure CN119573316A_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of refrigerators, and in particular relates to a refrigerator fresh-keeping component and a control method thereof, and a refrigerator. Background Art
[0002] Fresh fruits and vegetables not only have their own unique smell, but also their own specific texture. At present, refrigerators are used to preserve fruits and vegetables, mostly through sterilization technology or oxygen concentration control, to inhibit spoilage caused by microorganisms, reduce the intensity of respiration of fruits and vegetables, and control the weight loss and water loss of fruits and vegetables, but lack active control of the concentration of carbon dioxide, a dual-function gas that has the dual functions of regulating the intrinsic physiological and biochemical reactions of fruits and vegetables and antibacterial effects.
[0003] Carbon dioxide plays a role in the preservation of fruits and vegetables in two main ways. First, dissolved carbon dioxide changes the pH value of the environment inside and outside the cells, thereby affecting the activity of enzymes involved in physiological and biochemical metabolism, the permeability and fluidity of cell membranes. Second, it directly binds to some proteins and enzymes, affecting the structure and function of proteins and enzymes. The carbon dioxide content in the air is only 0.03%, which is far below the minimum threshold (2%) for carbon dioxide to work. Therefore, it is difficult to achieve the preservation of fruits and vegetables by enriching carbon dioxide in the air. During storage, the carbon dioxide produced by the respiration of fruits and vegetables themselves is slow and requires the consumption of the nutrients of fruits and vegetables themselves. Therefore, it is necessary to actively produce carbon dioxide to achieve the purpose of preserving fruits and vegetables.
[0004] At present, the main methods of producing carbon dioxide are combustion and adsorption and desorption. The combustion method has the disadvantages of consuming carbon sources and high reaction temperature. The adsorption and desorption method collects and releases carbon dioxide. For refrigerators, it is difficult to obtain a high concentration of carbon dioxide gas source, and thus it is impossible to collect and release it. Although coal can be oxidized at low temperature under constant temperature conditions of 60-90°C, its products contain not only carbon dioxide but also a high proportion of carbon monoxide. Although the lower the temperature, the less carbon monoxide is produced, the reaction rate is slow. When the temperature is increased, the proportion of carbon monoxide rises rapidly (there are technical records reporting that at 60°C, the carbon dioxide / carbon monoxide production ratio is 5:1, and at 90°C, the ratio becomes 3:1). Therefore, it is difficult to take into account both high carbon dioxide concentration and high carbon dioxide gas production rate at a lower temperature. Summary of the invention
[0005] Therefore, the present application provides a refrigerator preservation component and a control method thereof and a refrigerator, which can solve the problem in the prior art that carbon dioxide cannot be used for preservation in refrigerators.
[0006] In order to solve the above problems, the present application provides a refrigerator fresh-keeping component, comprising:
[0007] The housing has a sealed fresh-keeping chamber inside, and an air inlet and an air outlet are provided on the side wall of the fresh-keeping chamber;
[0008] A gas production component is arranged in the shell and is connected with the air inlet and the air outlet; the gas production component includes an air inlet channel and a nano-composite carbon mesh, the nano-composite carbon mesh is arranged in the air inlet channel, and the outlet of the air inlet channel is connected to the air inlet; the nano-composite carbon mesh is configured as a metal mesh with nano-scale carbon particles attached thereto, and the metal mesh can catalyze the oxidation of the carbon particles to generate carbon dioxide after heating.
[0009] In some embodiments,
[0010] The gas production component also includes a palladium alloy mesh arranged in the air inlet channel, and the palladium alloy mesh is located downstream of the nano-composite carbon mesh to purify the gas that is not completely oxidized by the carbon particles; the palladium alloy mesh can catalyze the complete oxidation of the incompletely oxidized gas after heating.
[0011] In some embodiments,
[0012] The refrigerator fresh-keeping component also includes a de-impurity device arranged downstream of the palladium alloy net for removing incompletely oxidized gas.
[0013] In some embodiments,
[0014] The impurity remover comprises an acidic potassium permanganate solution storage tank, the air inlet passage introduces the gas catalyzed by the palladium alloy into the storage tank, and the incompletely oxidized gas is oxidized and absorbed by the acidic potassium permanganate solution.
[0015] In some embodiments,
[0016] The impurity remover also includes a water storage tank, which is arranged between the palladium alloy mesh and the acidic potassium permanganate solution storage tank to absorb the incompletely oxidized gas in the air inlet channel.
[0017] In some embodiments,
[0018] The refrigerator fresh-keeping component also includes a cooler, which is arranged between the palladium alloy mesh and the impurity remover to cool the gas in the air inlet channel.
[0019] In some embodiments,
[0020] The refrigerator fresh-keeping component also includes a humidifier for humidifying the gas in the air inlet channel before the gas enters the air inlet.
[0021] In some embodiments,
[0022] The refrigerator fresh-keeping component also includes a reflux pipe connected to the air outlet, and the other end of the reflux pipe is connected to the air inlet channel between the palladium alloy mesh and the cooler.
[0023] According to another aspect of the present application, a control method of the refrigerator fresh-keeping component as described above is provided, comprising:
[0024] Detecting the concentration of carbon dioxide in the fresh-keeping room;
[0025] When the concentration value is less than a preset value, regulating the gas production component to operate and provide carbon dioxide to the fresh-keeping chamber;
[0026] When the concentration value is greater than or equal to the preset value, the operation of the gas production component is stopped.
[0027] In some embodiments,
[0028] When the concentration value is greater than the preset value, the refrigerator fresh-keeping component includes a reflux pipe, which regulates the carbon dioxide in the fresh-keeping chamber to flow to the air inlet channel through the reflux pipe for circulation.
[0029] In some embodiments,
[0030] Detect the temperature and humidity of the carbon dioxide before it enters the fresh-keeping room, and when the temperature and humidity reach the preset values, transport it into the fresh-keeping room until the carbon dioxide concentration in the fresh-keeping room reaches the preset concentration; otherwise, circulate through the reflux pipe for humidification and cooling; or,
[0031] The carbon dioxide concentration in the fresh-keeping chamber is detected at preset intervals. If the concentration is greater than the preset fresh-keeping concentration, the carbon dioxide in the fresh-keeping chamber is discharged to the air inlet passage through the reflux pipe, mixed with the air injected into the air inlet passage, and then refluxed to the fresh-keeping chamber.
[0032] According to another aspect of the present application, a refrigerator is provided, comprising the refrigerator fresh-keeping component as described above or a refrigerator fresh-keeping component operated according to the control method as described above; the fresh-keeping chamber is configured as a fruit and vegetable drawer, and the gas-generating component is disposed at the bottom of the shell and is connected to the fruit and vegetable drawer through a pipeline.
[0033] A refrigerator fresh-keeping component provided in the present application includes: a shell, in which a sealed fresh-keeping chamber is provided, and an air inlet and an air outlet are provided on the side wall of the fresh-keeping chamber; a gas-producing component is arranged in the shell and connected with the air inlet and the air outlet; the gas-producing component includes an air inlet channel and a nano-composite carbon mesh, the nano-composite carbon mesh is arranged in the air inlet channel, and the outlet of the air inlet channel is connected to the air inlet; the nano-composite carbon mesh is configured as a metal mesh with nano-scale carbon particles attached thereto, and the metal mesh can catalyze the carbon particles to undergo oxidation to generate carbon dioxide after heating.
[0034] This application has the following beneficial effects:
[0035] By setting a gas-producing component for producing carbon dioxide in the refrigerator shell, carbon dioxide is actively produced to preserve the fruits and vegetables in the refrigerator, so that the fruits and vegetables can be preserved for a longer period of time and a higher quality preservation effect can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS
[0036] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the implementation methods or the prior art descriptions. The drawings described below are merely exemplary, and for those of ordinary skill in the art, other implementation drawings can be derived from the provided drawings without creative work.
[0037] Figure 1 This is a schematic diagram of the structure of a refrigerator according to an embodiment of the present application;
[0038] Figure 2 This is a schematic structural diagram of a refrigerator fresh-keeping component according to an embodiment of the present application;
[0039] Figure 3 This is a flow chart of the control method of an embodiment of the present application.
[0040] The reference numerals are:
[0041] 1. Shell; 11. Air hole;
[0042] 2. Fruit and vegetable drawer; 21. Air outlet flow valve; 22. Air inlet flow valve;
[0043] 3. Refrigerator fresh-keeping components;
[0044] 31. Air intake channel; 311. Temperature and humidity sensor; 312. Carbon dioxide sensor;
[0045] 32. Reflux pipe; 321. Check valve;
[0046] 33. Nanocomposite carbon mesh; 34. Palladium alloy mesh; 35. Condenser; 36. Acidic potassium permanganate solution storage tank; 37. Deionized water container. DETAILED DESCRIPTION
[0047] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0048] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.
[0049] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.
[0050] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.
[0051] See also Figures 1 to 3 As shown, according to an embodiment of the present application, a refrigerator fresh-keeping component 3 includes:
[0052] The housing 1 is provided with a sealed fresh-keeping chamber, and the side wall of the fresh-keeping chamber is provided with an air inlet and an air outlet;
[0053] A gas production component is arranged in the shell 1 and is connected to the air inlet and the air outlet; the gas production component includes an air inlet channel 31 and a nano-composite carbon mesh 33, the nano-composite carbon mesh 33 is arranged in the air inlet channel 31, and the outlet of the air inlet channel 31 is connected to the air inlet; the nano-composite carbon mesh 33 is configured as a metal mesh with nano-scale carbon particles attached, and the metal mesh can catalyze the carbon particles to oxidize and generate carbon dioxide after heating.
[0054] The present application sets a gas-producing component for producing carbon dioxide in the refrigerator housing 1 to actively produce carbon dioxide to preserve the fruits and vegetables in the refrigerator, thereby achieving a longer storage period for the fruits and vegetables and obtaining a higher quality preservation effect.
[0055] The carbon dioxide gas produced by the gas production component is sent into the fresh-keeping room through the air inlet to keep the fruits and vegetables in the fresh-keeping room fresh; when the carbon dioxide content in the fresh-keeping room is high, it can be discharged through the air outlet to reduce its content.
[0056] In order to ensure the air intake of the air intake passage 31, an air pump or a compressor or other equipment may be additionally provided.
[0057] The gas production component specifically adopts a nano-composite carbon mesh 33 arranged in the air intake channel 31. The air intake channel 31 is an air channel containing oxygen. The structure of the nano-composite carbon mesh 33 is that nano-scale carbon particles are attached to the metal mesh, so that when the metal mesh is heated up, it can catalyze the carbon particles to oxidize and generate carbon dioxide; wherein the heating of the metal mesh can be achieved by energizing the metal mesh itself to heat up to a preset temperature. When air passes through the metal mesh, the nano-scale carbon particles attached to the metal mesh undergo an oxidation reaction, and at least part of the carbon dioxide gas will be produced, which will be sent into the fresh-keeping room along the air intake channel 31.
[0058] In some embodiments,
[0059] The gas production component also includes a palladium alloy mesh 34 arranged in the air inlet channel 31, and the palladium alloy mesh 34 is located downstream of the nano-composite carbon mesh 33 to purify the gas that is not completely oxidized by the carbon particles; the palladium alloy mesh 34 can catalyze the complete oxidation of the incompletely oxidized gas after heating.
[0060] For the above-mentioned airflow passing through the nano-composite carbon mesh 33, there are still some gases that are not completely oxidized, such as carbon monoxide, hydrocarbons, alkynes, etc. The gas production component of the present application sets a palladium alloy mesh 34 downstream of the nano-composite carbon mesh 33, and uses metal palladium to catalyze and oxidize the gases that are not completely oxidized, including carbon monoxide, hydrocarbons, alkynes, etc., into carbon dioxide at high temperature.
[0061] The composition of the palladium alloy mesh 34 is mainly composed of palladium metal as the main element, and metals such as chromium, manganese, and zinc are added to reduce the temperature required for the oxidizing gas and increase the range of the oxidizing gas.
[0062] In some embodiments,
[0063] The refrigerator fresh-keeping component 3 also includes a de-impurity device arranged downstream of the palladium alloy mesh 34 for removing incompletely oxidized gases.
[0064] For the airflow passing through the palladium alloy mesh 34, some incompletely oxidized gases will remain. In order to prevent these gases from entering the fresh-keeping room, impurity removal treatment is required. The present application sets an impurity remover downstream of the palladium alloy mesh 34 to remove these gases.
[0065] In some embodiments,
[0066] The impurity remover includes an acidic potassium permanganate solution storage tank 36, and the air inlet channel 31 introduces the gas catalyzed by the palladium alloy into the storage tank, and the incompletely oxidized gas is oxidized and absorbed by the acidic potassium permanganate solution.
[0067] The impurity remover specifically adopts an acidic potassium permanganate solution storage tank 36, and utilizes the strong oxidizing property of the acidic potassium permanganate solution in the storage tank to oxidize the unoxidized or incompletely oxidized gas. The remaining gas is one of the by-products of acetylenic gases after the treatment of the palladium alloy mesh 34, and the other is ethylene produced by fruits and vegetables in the later stage of storage. The acidic potassium permanganate solution can oxidize the acetylenic gases and other gases at room temperature to avoid temperature fluctuations caused by heating.
[0068] In some embodiments,
[0069] The impurity remover further includes a water storage tank, which is disposed between the palladium alloy mesh 34 and the acidic potassium permanganate solution storage tank 36 to absorb the incompletely oxidized gas in the air inlet passage 31 .
[0070] The impurity remover may also include a water storage tank containing deionized water, which is arranged between the palladium alloy mesh 34 and the acidic potassium permanganate solution storage tank 36 to remove impurities from the airflow through water, absorb the water-soluble gas, and cool and humidify the airflow at the same time.
[0071] In some embodiments,
[0072] The refrigerator fresh-keeping component 3 also includes a cooler, which is arranged between the palladium alloy mesh 34 and the impurity remover to cool the gas in the air inlet channel 31.
[0073] Both the nano-composite carbon mesh 33 and the palladium alloy mesh 34 need to be heated to complete, which heats the airflow and causes the airflow temperature to be high, which is not suitable for being directly sent into the fresh-keeping room. The present application sets a cooler between the palladium alloy mesh 34 and the impurity remover to cool the airflow.
[0074] The cooler can specifically be a condenser 35, which can quickly cool the airflow to avoid excessive temperature and avoid affecting the impurity removal process of the acidic potassium permanganate solution.
[0075] In some embodiments,
[0076] The refrigerator fresh-keeping component 3 also includes a humidifier to humidify the gas in the air inlet channel 31 before it enters the air inlet.
[0077] The airflow is continuously heated and oxidized, and the water content of the airflow is greatly reduced. Too dry gas is not good for preservation. The present application adds a humidifier in the air inlet channel 31 to humidify the airflow. Specifically, a deionized water container 37 can be used, which is respectively arranged upstream and downstream of the acidic potassium permanganate solution storage tank 36. The upstream deionized water removes impurities and humidifies the airflow to improve the impurity removal effect of the acidic potassium permanganate solution. The downstream deionized water humidifies the airflow and prevents a small amount of potassium permanganate solution from being brought into the fresh-keeping room by the high-speed airflow.
[0078] In some embodiments,
[0079] The refrigerator fresh-keeping component 3 also includes a reflux pipe 32 connected to the air outlet, and the other end of the reflux pipe 32 is connected to the air inlet channel 31 between the palladium alloy mesh 34 and the cooler.
[0080] Since fruits and vegetables in the fresh-keeping room will also release a small amount of carbon dioxide and olefin and alkyne gases during the preservation process, when the carbon dioxide content in the fresh-keeping room exceeds the standard, the reflux pipe 32 is used to guide the gas in the fresh-keeping room to ensure that the carbon dioxide content is within a concentration range suitable for preservation.
[0081] In the present application, the outflow end of the reflux pipe 32 is connected to the air inlet channel 31 between the palladium alloy mesh 34 and the cooler, so that the derived gas will be processed by the impurity remover after being cooled, ensuring that the carbon dioxide gas returns to the fresh-keeping room for reuse, thereby reducing the use of the nano-composite carbon mesh 33.
[0082] Correspondingly, if the content of carbon dioxide is too high, fresh air can be injected from the air intake passage 31 to reduce its concentration. At this time, the nano-composite carbon mesh 33 is in a non-electrically heated state.
[0083] The present application can also set a short-circuit passage for the air inlet and the air outlet outside the fresh-keeping room, and set an outlet flow valve 21 and an inlet flow valve 22 at both ends of the short-circuit passage accordingly; when the carbon dioxide gas concentration exceeds the preset range, the gas is not sent into the fresh-keeping room, but circulates through the reflux pipe 32 until the carbon dioxide concentration at the air inlet meets the standard, and then it is sent into the fresh-keeping room.
[0084] According to another aspect of the present application, a control method of the refrigerator fresh-keeping component 3 as described above is provided, comprising:
[0085] Detecting the concentration of carbon dioxide in the fresh-keeping room;
[0086] When the concentration value is less than a preset value, regulating the gas production component to operate and provide carbon dioxide to the fresh-keeping chamber;
[0087] When the concentration value is greater than or equal to the preset value, the operation of the gas production component is stopped.
[0088] The present application sets a temperature and humidity sensor 311 and a carbon dioxide concentration sensor at the end of the air inlet channel 31 to detect the airflow sent into the fresh-keeping room. When the preset concentration value and temperature and humidity are reached, the airflow is sent into the fresh-keeping room. Correspondingly, a carbon dioxide sensor 312 can be set in the fresh-keeping room to detect the carbon dioxide content in the fresh-keeping room. When it exceeds the preset value, the gas production component is stopped to save resources.
[0089] In some embodiments,
[0090] When the concentration value is greater than the preset value, the refrigerator preservation component 3 includes a reflux pipe 32, which regulates the carbon dioxide in the preservation chamber to flow to the air inlet channel 31 through the reflux pipe 32 for circulation.
[0091] When the carbon dioxide content in the fresh-keeping room is too high, it can be discharged through the reflux pipe 32 and returned to the fresh-keeping room after being reprocessed through the air inlet channel 31; during this period, some fresh air can be added to reduce the overall carbon dioxide content.
[0092] According to another aspect of the present application, a refrigerator is provided, comprising the refrigerator fresh-keeping component 3 as described above or the refrigerator fresh-keeping component 3 operated according to the control method as described above; the fresh-keeping chamber is configured as a fruit and vegetable drawer 2, and the gas-generating component is disposed at the bottom of the shell 1 and is connected to the fruit and vegetable drawer 2 through a pipeline.
[0093] The refrigerator of the present application adopts the above-mentioned refrigerator preservation component 3. The entire operation can be set to turn on the refrigerator operation button, the freezer evaporator runs, the refrigeration system is turned on, the carbon dioxide generation system is turned on, and the nano-composite carbon mesh 33 is powered on and heated to a preset temperature. Air is sucked into the nano-composite carbon mesh 33 through the air holes 11 on the shell 1. Under the catalytic action of the metal, the nano-carbon particles are oxidized into carbon dioxide. The generated gas enters the palladium alloy mesh 34 through a pipeline and continues to be oxidized under high temperature conditions. Carbon monoxide, hydrocarbons, alkynes, etc. in the gas are completely oxidized into carbon dioxide. Then the gas passes through The pipeline passes through the condenser 35 area for circulation cooling, and then the gas enters the deionized water to continue cooling and humidification, and then enters the acidic potassium permanganate solution to remove the acetylene impurity gas that may not be completely oxidized, and finally enters the deionized water to continue cooling and humidification. The gas after multi-stage purification, cooling and humidification flows through the temperature and humidity sensor 311 for temperature and humidity detection. After meeting the temperature and humidity setting requirements, it flows through the metering flow valve and is calculated according to the concentration detected by the carbon dioxide sensor 312. The gas is quantitatively and constantly input into the fruit and vegetable drawer 2 to meet the set carbon dioxide concentration requirements.
[0094] When the temperature and humidity do not meet the set requirements, the metering circulation valve closes the switch entering the fruit and vegetable drawer 2, allowing the gas to flow back through the short-circuit passage to the pipeline near the condenser 35 for cooling and humidification treatment. After the temperature and humidity settings are met, the metering circulation valve closes the bypass pipeline outlet and opens the entrance to the fruit and vegetable drawer 2. After calculating according to the concentration detected by the carbon dioxide sensor 312, the gas is input into the fruit and vegetable drawer 2 at a constant rate and in a quantitative manner to meet the set carbon dioxide concentration requirements.
[0095] After long-term storage, when it is detected that too much carbon dioxide is produced by the respiration of fruits and vegetables, the metering circulation valve draws the gas in the fruit and vegetable drawer 2 into the pipe near the condenser 35 by exhausting air, and at the same time, air is introduced at the inlet to dilute the carbon dioxide concentration. Then, it passes through the condenser 35 area, deionized water, acidic potassium permanganate solution, and deionized water for purification, cooling and humidification again. The acidic potassium permanganate solution is used to oxidize the ripening gas - ethylene produced by the natural physiological metabolism of fruits and vegetables, so as to achieve the effect of stabilizing the carbon dioxide concentration and removing ethylene in the space for long-term storage of fruits and vegetables, and realize higher quality preservation of fruits and vegetables for a longer time.
[0096] Among them, in the carbon dioxide generation stage: the carbon dioxide generation system is turned on. After the nano-composite carbon net 33 is electrically heated to reach the preset temperature T1 (60 - 90 °C), air is inhaled into the nano-composite carbon net 33. Under the catalytic action of the metal, the nano-carbon particles are oxidized, and the generated gas enters the palladium alloy net 34 through a pipeline and continues to be oxidized at the temperature T2 (160 - 220 °C). This stage is the carbon dioxide generation stage. At low temperature, the metal catalytic net is used to oxidize the nano-carbon particles, and the generated gas enters the high-temperature palladium alloy net 34 for further oxidation. In this stage, most of the carbon elements are first oxidized to carbon dioxide, and then the impurity gases such as carbon monoxide, hydrocarbons, and alkynes that cannot be completely oxidized are further oxidized to provide high-concentration pure carbon dioxide gas for the follow-up process.
[0097] Purification, cooling, and humidification stage: The gas generated in the previous stage passes through the condenser 35 area through a pipeline for circulating cooling. The gas passes through deionized water, acidic potassium permanganate solution, and deionized water in sequence. After multi-stage purification, cooling, and humidification, the gas flows through the temperature and humidity sensor 311 for temperature and humidity detection, recording the gas temperature ti (i ≥ 1, a positive integer, the same below) and humidity Ri. The gas passes through the carbon dioxide sensor 312 and records the carbon dioxide concentration C, and determines whether the gas temperature and humidity simultaneously satisfy t0 - 1 < temperature ti < t0 - 1 and R0 - 1 < humidity Ri < R0 - 1 (2 °C < t0 < 8 °C, 75% < R0 < 99%). If so, it enters the refrigerator fruit and vegetable drawer 2 at a flow rate Vi [flow rate Vi = (carbon dioxide concentration C × volume V0 of the refrigerator fruit and vegetable drawer 2) / time P, (where 20 L < V0 < 50 L, 1 h < P < 3 h)] and stops when the preset carbon dioxide concentration C0 (2% - 10%) is reached. Then it enters the next stage; otherwise, this stage is cycled again until the temperature and humidity meet the set values. This stage is the purification, cooling, and humidification stage. The carbon dioxide gas generated in the previous stage has a relatively high temperature, and it passes through the condenser 35 area through a pipeline for heat exchange and cooling, and then enters the deionized water to wash off the particulate impurities and at the same time for cooling and humidification. Then it enters the acidic potassium permanganate solution to oxidize and absorb the alkynes that cannot be completely oxidized. Then it enters the deionized water again for further cooling and humidification. Finally, the temperature, humidity, and carbon dioxide concentration of the gas are detected, and it is determined whether to enter the next stage according to whether the temperature and humidity meet the requirements. The carbon dioxide concentration is recorded, and it is filled into the refrigerator fruit and vegetable drawer 2 at the flow rate Vi and stops when the preset carbon dioxide concentration C0 (2% - 10%) is reached.
[0098] Long-term storage stage: turn off the carbon dioxide generation system, and detect the carbon dioxide concentration Ci in the drawer every d days. If the carbon dioxide concentration Ci> the set value C0, the system inhales air at a flow rate of V0, and at the same time opens the metering circulation valve to extract the high-concentration carbon dioxide and ethylene gas in the fruit and vegetable drawer 2, completes the gas mixing at the front end of the one-way valve 321, and then performs the purification, cooling and humidification stage again, and mixes the treated gas into the refrigerator drawer; if not, continue to execute this stage for long-term storage. This stage is a long-term storage stage. As the storage time of fruits and vegetables increases, the respiration of fruits and vegetables will continuously produce carbon dioxide and ethylene. When the concentration of carbon dioxide and ethylene in the drawer exceeds the appropriate concentration, the air is inhaled and filled into the drawer after purification, cooling and humidification, which serves to dilute the carbon dioxide concentration in the drawer. At the same time, the acidic potassium permanganate solution is used to oxidize and remove the ethylene gas accumulated in the fruit and vegetable drawer 2, which plays a role in long-term stability of the carbon dioxide concentration in the drawer and regular removal of ethylene gas produced by fruits and vegetables, achieving a higher quality preservation of fruits and vegetables for a longer time.
[0099] It is easy for those skilled in the art to understand that the above-mentioned implementation modes can be freely combined and superimposed without conflict.
[0100] The above is only a preferred embodiment of the present application and is 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 is only a preferred implementation 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 refrigerator fresh-keeping component, characterized in that: include: A housing (1) is provided with a sealed fresh-keeping chamber, and a side wall of the fresh-keeping chamber is provided with an air inlet and an air outlet; A gas production component is arranged in the shell (1) and is connected to the air inlet and the air outlet; the gas production component comprises an air inlet channel (31) and a nano-composite carbon mesh (33); the nano-composite carbon mesh (33) is arranged in the air inlet channel (31), and the outlet of the air inlet channel (31) is connected to the air inlet; the nano-composite carbon mesh (33) is a metal mesh with nano-scale carbon particles attached thereto, and the metal mesh can catalyze the carbon particles to oxidize and generate carbon dioxide after heating.
2. The refrigerator fresh-keeping component according to claim 1, characterized in that: The gas production component also includes a palladium alloy mesh (34) arranged in the air inlet channel (31), and the palladium alloy mesh (34) is located downstream of the nano-composite carbon mesh (33) to purify the gas generated by the incomplete oxidation of the carbon particles; the palladium alloy mesh (34) can catalyze the complete oxidation of the incompletely oxidized gas after heating.
3. The refrigerator fresh-keeping component according to claim 2, characterized in that: The refrigerator fresh-keeping component also includes a de-impurity device arranged downstream of the palladium alloy mesh (34) for removing incompletely oxidized gas.
4. The refrigerator fresh-keeping component according to claim 3, characterized in that: The impurity remover comprises an acidic potassium permanganate solution storage tank (36), and the air inlet channel (31) introduces the gas catalyzed by the palladium alloy mesh (34) into the storage tank, and the incompletely oxidized gas is oxidized and absorbed by the acidic potassium permanganate solution.
5. The refrigerator fresh-keeping component according to claim 3 or 4, characterized in that: The impurity remover also includes a water storage tank, which is arranged between the palladium alloy mesh (34) and the acidic potassium permanganate solution storage tank (36) and absorbs the incompletely oxidized gas in the air inlet channel (31).
6. The refrigerator fresh-keeping assembly according to claim 5, characterized in that: The refrigerator fresh-keeping component also includes a cooler, which is arranged between the acidic potassium permanganate solution storage tank (36) and the air inlet and cools the gas in the air inlet channel (31).
7. The refrigerator fresh-keeping assembly according to claim 6, characterized in that: The refrigerator fresh-keeping component also includes a humidifier for humidifying the gas in the air inlet channel (31) before the gas enters the air inlet.
8. The refrigerator fresh-keeping assembly according to claim 6, characterized in that: The refrigerator fresh-keeping component also includes a return pipe (32) connected to the air outlet, and the other end of the return pipe (32) is connected to the air inlet channel (31) between the palladium alloy mesh (34) and the cooler.
9. A control method for a refrigerator fresh-keeping component according to any one of claims 1 to 8, characterized in that: include: Detecting the concentration of carbon dioxide in the fresh-keeping room; When the concentration value is less than a preset value, regulating the gas production component to operate and provide carbon dioxide to the fresh-keeping chamber; When the concentration value is greater than or equal to the preset value, the operation of the gas production component is stopped.
10. The control method according to claim 9, characterized in that: When the concentration value is greater than the preset value, the refrigerator fresh-keeping component includes a reflux pipe (32) to regulate the carbon dioxide in the fresh-keeping chamber to flow through the reflux pipe (32) to the air inlet channel (31) for circulation.
11. The control method according to claim 9 or 10, characterized in that: Detecting the temperature and humidity of the carbon dioxide before entering the fresh-keeping room, and when the temperature and humidity reach preset values, transporting it into the fresh-keeping room until the carbon dioxide concentration in the fresh-keeping room reaches the preset concentration for fresh-keeping; otherwise, circulating through the reflux pipe (32) for humidification and cooling; or, The carbon dioxide concentration in the fresh-keeping chamber is detected at preset intervals. If the concentration is greater than the preset fresh-keeping concentration, the carbon dioxide in the fresh-keeping chamber is led out to the air inlet passage through the reflux pipe (32), mixed with the air injected into the air inlet passage, and then refluxed into the fresh-keeping chamber.
12. A refrigerator, characterized in that: It comprises a refrigerator fresh-keeping component (3) as described in any one of claims 1 to 8 or a refrigerator fresh-keeping component (3) operated according to the control method as described in any one of claims 9 to 11; the fresh-keeping chamber is configured as a fruit and vegetable drawer (2), and the gas generating component is arranged at the bottom of the shell (1) and is connected to the fruit and vegetable drawer (2) through a pipeline.