Degradation device and refrigeration appliance

Abstract

The utility model provides a kind of degradation device and refrigeration appliance, a kind of degradation device includes shell and degradation module;The inner chamber of shell is storage cavity, and the cover of being opened or closed is provided on shell, to make storage cavity produce temperature change in the process of opening or closing cover;Degradation module is installed in shell, and the working state of degradation module is driven by temperature change of storage cavity, and the working state of degradation module includes adsorption state and catalytic degradation state;When closing cover, degradation module is in adsorption state, and degradation module adsorbs organic compound in storage cavity;When opening cover, degradation module is in catalytic degradation state, and degradation module degrades adsorbed organic compound.In the utility model, by the switch action of cover and the working state of degradation module are combined, device can automatically switch mode, without user manual operation or additional control equipment.

Description

Technical Field

[0001] This utility model belongs to the field of refrigeration electrical technology, specifically relating to a degradation device and a refrigeration electrical appliance. Background Technology

[0002] Refrigeration appliances, such as refrigerators, freezers, and refrigerated display cases, are indispensable equipment in modern life. As people's living standards improve, they are increasingly concerned about the safety and health of the food storage environment inside refrigerators. Volatile organic compounds (TVOCs) inside refrigerators mainly originate from the food itself (such as fruit and vegetable metabolism and meat spoilage) and the release of volatile organic compounds from plastic packaging materials. These TVOCs easily accumulate, causing food to absorb odors, and some components (such as formaldehyde and benzene compounds) pose a potential threat to human health. Therefore, developing efficient and safe air purification technologies for inside refrigerators is of great significance.

[0003] The most typical purification solution for TVOCs in refrigerators uses adsorbents such as activated carbon. While this technology is low-cost, its adsorption capacity is limited, and it only involves the enrichment and phase transfer of pollutants, not complete degradation. Once saturated, it not only loses its purification effect but may even become a secondary source of pollution, requiring frequent replacement and resulting in a poor user experience. Photocatalytic oxidation technology can degrade TVOCs, but its efficient operation depends on continuous ultraviolet light irradiation and specific temperature conditions. In the low-temperature, enclosed environment of a refrigerator without a built-in ultraviolet light source, its catalytic efficiency drops significantly. Furthermore, maintaining the operating temperature required for the ultraviolet lamp and catalytic reaction consumes additional electrical energy, contradicting the energy-saving design philosophy of refrigerators. Conventional bio-enzyme purification technology directly immobilizes bio-enzymes on a carrier, utilizing their catalytic action to degrade pollutants. However, the long-term low-temperature environment inside a refrigerator greatly inhibits the catalytic activity of bio-enzymes, resulting in extremely low purification efficiency most of the time, failing to achieve immediate and efficient purification. Utility Model Content

[0004] This invention provides a degradation device and a refrigeration appliance, which can solve the technical problem that existing purification schemes for volatile organic compounds are difficult to adapt to periodic temperature changes to complete the degradation.

[0005] This utility model provides a degradation device, which includes: a shell and a degradation module; The inner cavity of the shell is a storage cavity, and the shell is provided with a cover that can be opened or closed, so that the storage cavity will have a temperature change when the cover is opened or closed. The degradation module is installed in the housing, and the working state of the degradation module is driven by the temperature change of the storage cavity. The working state of the degradation module includes adsorption state and catalytic degradation state. When the cover is closed, the degradation module is in the adsorption state, and the degradation module adsorbs organic compounds in the storage cavity; when the cover is opened, the degradation module is in the catalytic degradation state, and the degradation module degrades the adsorbed organic compounds.

[0006] In some embodiments, the degradation module includes an adsorption catalytic layer and an encapsulation layer, wherein the adsorption catalytic layer is encapsulated in the encapsulation layer, and organic compounds in the storage cavity pass through the encapsulation layer and are adsorbed by the adsorption catalytic layer.

[0007] In some embodiments, the adsorption catalytic layer includes a support and a catalyst, wherein the support has a plurality of mesopores evenly distributed thereon, the mesopores are loaded with the catalyst, and the organic compounds in the storage cavity are adsorbed by the mesopores and the catalyst.

[0008] In some embodiments, a temperature-responsive layer is provided on the surface of the carrier, and the temperature-responsive layer covers the channel entrance area of ​​the mesopore. The temperature-responsive layer adjusts the opening and closing state of the channel according to the temperature change of the storage cavity, thereby forming a temperature-sensitive gating structure at the channel entrance of the mesopore.

[0009] In some embodiments, the temperature-responsive layer is a thermosensitive coating. When the cover is closed, the thermosensitive coating is in a hydrophilic, expanded state, and the organic compounds in the storage cavity enter the interior of the mesopores, and the degradation module is in the adsorption state. When the cover is opened, the thermosensitive coating is in a hydrophobic, contracted state, generating an outward thrust on the products after the degradation of organic compounds, and the degradation module is in the catalytic degradation state.

[0010] In some embodiments, a heating module is also included, which is thermally coupled to the degradation module and provides heat energy to the degradation module to trigger or promote the catalytic degradation function of the degradation module.

[0011] In some embodiments, the heating module includes a mounting panel and a plurality of heating elements, which are evenly distributed on the mounting panel. The degradation module has a first end face and a second end face, with the first end face facing the cover and the mounting panel disposed opposite to the second end face.

[0012] In some embodiments, the housing is provided with a return air inlet and a return air outlet, and a fan is provided at the return air inlet. The fan sends air from the external environment into the storage cavity, and the air in the storage cavity is discharged from the return air outlet.

[0013] A refrigeration appliance includes a degradation device, wherein the degradation device is the degradation device described above.

[0014] The degradation device and refrigeration appliance provided by this utility model have the following beneficial effects: In this invention, by combining the opening and closing action of the lid with the working state of the degradation module, the device can automatically switch working modes without manual operation or additional control equipment. This automation greatly improves the user experience. Users only need to use the refrigerator normally, and the device can automatically complete the adsorption and degradation process. Each time the lid is opened or closed, the device quickly switches its working state to ensure that TVOCs are processed in a timely manner during the user's use of the refrigerator. This instant response mechanism allows the device to adapt to frequent refrigerator use scenarios and maintain a good purification effect at all times. When the lid is closed, the temperature of the storage cavity decreases. At this time, the degradation module enters the adsorption state, using the low temperature conditions to enhance the adsorption capacity of the degradation module for TVOCs. The low temperature can also make the adsorption performance of the adsorbent better, because the lower temperature helps TVOC molecules to adhere more stably to the surface of the adsorbent. When the lid is opened, the storage cavity comes into contact with the external environment, and the temperature rises. This not only prompts the degradation module to release the adsorbed TVOCs, but also activates the catalytic action, putting it into a highly efficient degradation state. This dual utilization of temperature changes allows the adsorption and degradation processes to be seamlessly connected, maximizing the purification efficiency. Attached Figure Description

[0015] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the degradation device according to an embodiment of the present invention; Figure 2 This is a frontal longitudinal section schematic diagram of the degradation device according to an embodiment of the present invention; Figure 3 This is a side longitudinal section schematic diagram of the degradation device according to an embodiment of the present invention; Figure 4 for Figure 3 Enlarged detail image; Figure 5 This is a schematic diagram of the heating device according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the adsorption catalyst layer and the encapsulation layer in an embodiment of the present invention; Figure 7 This is a schematic diagram of the return air inlet and return air outlet according to an embodiment of the present utility model.

[0017] Attached Figures: 1-Shell; 101-Storage cavity; 102-Return air inlet; 103-Return air outlet; 2-Degradation module; 201-Adsorption catalytic layer; 211-Carrier component; 212-Mesopores; 202-Encapsulation layer; 3-Cover; 4-Heating module; 401-Mounting panel; 402-Heating element. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0019] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0020] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used here to describe the spatial positional relationship of a device or feature as shown in the figure with other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation of the device as described in the figure. For example, if a device in the figure is inverted, a device described as "above" or "on top of" other devices or structures will subsequently be positioned as "below" or "under" other devices or structures.

[0021] See also Figures 1 to 7As shown, according to an embodiment of the present invention, a degradation device is provided, which includes a housing 1 and a degradation module 2; the inner cavity of the housing 1 is a storage cavity 101, and a cover 3 that can be opened or closed is provided on the housing 1 so that the storage cavity 101 generates a temperature change during the opening or closing of the cover 3; the degradation module 2 is installed in the housing 1, and the working state of the degradation module 2 is driven by the temperature change of the storage cavity 101. The working state of the degradation module 2 includes an adsorption state and a catalytic degradation state; when the cover 3 is closed, the degradation module 2 is in the adsorption state, and the degradation module 2 adsorbs volatile organic compounds in the storage cavity 101; when the cover 3 is opened, the degradation module 2 is in the catalytic degradation state, and the degradation module 2 degrades the adsorbed volatile organic compounds.

[0022] It is worth noting that the main body of the device is a shell 1 with a storage cavity 101, which is the degradation zone and is used to store food and other items. The shell 1 has a cover 3 that can be opened or closed. The opening and closing of the cover 3 will directly affect the temperature change inside the storage cavity 101. The degradation module 2 is the core part of the device and is installed inside the shell 1. The degradation module 2 has two working states: adsorption state and catalytic degradation state. The switching between these two states is driven by the temperature change of the storage cavity 101.

[0023] Specifically, when the lid 3 is closed, the storage cavity 101 is in a relatively sealed state, and the internal temperature gradually decreases (similar to the normal operating state of a refrigerator). Under low-temperature conditions, the degradation module 2 enters the adsorption state. At this time, the adsorption material in the module (such as activated carbon or other highly efficient adsorbents) begins to adsorb volatile organic compounds (TVOCs) in the storage cavity 101. These TVOCs mainly come from food metabolism (such as ethylene released by fruits and vegetables, amines produced by meat spoilage, etc.) and organic matter released by plastic packaging materials. When the user opens the lid 3, the storage cavity 101 comes into contact with the external environment, and the temperature rises rapidly (because the external temperature can be higher than the internal temperature of the refrigerator). The temperature rise triggers the degradation module 2 to switch from the adsorption state to the catalytic degradation state. At a higher temperature, the TVOC molecules adsorbed on the degradation module 2 are released and catalytically degraded. The degradation module 2 decomposes these TVOC molecules into harmless small molecules (such as carbon dioxide and water), thereby achieving complete degradation of TVOCs. After the degradation process is completed, when the user closes the lid 3 again, the device re-enters the adsorption state, preparing for the next cycle.

[0024] In this embodiment, by combining the opening and closing action of the cover 3 with the working state of the degradation module 2, the device can automatically switch working modes without manual operation by the user or additional control equipment. This automation greatly improves the user experience. The user only needs to use the refrigerator normally, and the device can automatically complete the adsorption and degradation process. Every time the cover 3 is opened or closed, the device will quickly switch working states to ensure that TVOC can be processed in a timely manner during the user's use of the refrigerator. This instant response mechanism allows the device to adapt to the frequent use scenarios of the refrigerator and always maintain a good purification effect. When the cover 3 is closed, the temperature of the storage cavity 101 decreases. At this time, the degradation module 2 enters the adsorption state. The low temperature condition enhances the adsorption capacity of the degradation module 2 for TVOC. The low temperature can make the adsorption performance of the adsorbent better because the lower temperature helps TVOC molecules to attach more stably to the surface of the adsorbent. When the cover 3 is opened, the storage cavity 101 comes into contact with the external environment, and the temperature rises. This not only prompts the degradation module 2 to release the adsorbed TVOC, but also activates the catalytic action, causing it to enter a highly efficient degradation state. This dual utilization of temperature change allows the adsorption and degradation processes to be seamlessly connected, maximizing the purification efficiency.

[0025] In this embodiment, the degradation module 2 is driven by the natural temperature change generated by the opening and closing of the refrigerator lid 3, requiring no additional energy input (such as heating elements or ultraviolet light sources). This setup perfectly aligns with the energy-saving concept of refrigerators, without increasing energy consumption, while achieving highly efficient purification. Through a dual mechanism of adsorption and degradation, the device effectively removes TVOC from the refrigerator, preventing food odor transfer and the accumulation of harmful substances. This synergistic effect not only solves the problem of traditional adsorbents failing after saturation but also avoids the inefficiency of photocatalytic technology at low temperatures. In the adsorption state, the degradation module 2 efficiently adsorbs TVOC, preventing its diffusion within the refrigerator; while in the degradation state, the device completely decomposes the adsorbed TVOC into harmless substances (such as carbon dioxide and water). This synergistic effect ensures that the adsorbent does not become a secondary pollution source due to saturation, thereby improving the reliability and safety of the device. Through the periodic adsorption and degradation process, the adsorbent continuously releases and degrades the adsorbed TVOC, extending its service life. This dynamic balance mechanism ensures that the adsorbent maintains a high adsorption efficiency, reducing the frequency of adsorbent replacement and lowering operating costs.

[0026] See also Figures 1 to 4As shown, the degradation module 2 includes an adsorption catalyst layer 201 and an encapsulation layer 202. The adsorption catalyst layer 201 is encapsulated within the encapsulation layer 202. Volatile organic compounds (VOCs) in the storage cavity 101 pass through the encapsulation layer 202 and are adsorbed by the adsorption catalyst layer 201. The adsorption catalyst layer 201 is the core component of the degradation module 2, responsible for adsorbing and catalytically degrading VOCs (TVOCs). It can be composed of a highly efficient adsorbent (such as activated carbon, molecular sieves, etc.) and a catalytic material (such as metal oxide catalysts, photocatalysts, etc.). The adsorbent is used to adsorb TVOCs, while the catalytic material is used to decompose the adsorbed TVOCs into harmless substances under appropriate conditions. The encapsulation layer 202 encapsulates the adsorption catalyst layer 201 while allowing air (including TVOCs) in the storage cavity 101 to pass through. The encapsulation layer 202 can be made of a highly permeable material, such as a microporous membrane, breathable fabric, or a special porous material, which protects the adsorption catalyst layer 201 from external physical damage and ensures that TVOCs can smoothly enter the adsorption catalyst layer 201. The breathable encapsulation layer 202 is a flexible film with high gas permeability, made of food-grade film. It is configured to allow gas molecules to pass through and encapsulate the response regulation layer and the catalytic degradation layer inside it. Specifically, when the cover 3 is closed, the temperature inside the storage cavity 101 gradually decreases. This temperature change triggers the degradation module 2 to enter the adsorption state. TVOCs (such as ethylene and aldehydes produced by food metabolism, or organic matter released from packaging materials) in the storage cavity 101 enter the adsorption catalyst layer 201 through the micropores or breathable channels of the encapsulation layer 202. The adsorption catalyst layer 201 adsorbs TVOC molecules onto its surface. At this time, the catalyst material is in a relatively low temperature state, mainly performing adsorption functions and temporarily not undergoing degradation reactions. TVOCs are continuously adsorbed and accumulated in the adsorption catalyst layer 201, awaiting the subsequent degradation process. When the cover 3 is opened, the storage cavity 101 comes into contact with the external environment, and the temperature rises rapidly. This temperature change triggers the degradation module 2 to switch from the adsorption state to the catalytic degradation state. As the temperature rises, the TVOC molecules adsorbed in the adsorption catalytic layer 201 are gradually released and begin the catalytic degradation reaction. The released TVOC decomposes into harmless small molecules, such as carbon dioxide (CO2) and water (H2O). After the degradation is completed, the air in the storage cavity 101 is purified and the TVOC concentration is significantly reduced. At the same time, the adsorption catalytic layer 201 returns to its initial state, ready for the next adsorption process.

[0027] In this embodiment, the encapsulation layer 202 provides a relatively stable operating environment for the adsorption catalyst layer 201, ensuring that the adsorbent and catalyst materials maintain good performance during long-term use. Simultaneously, the permeability of the encapsulation layer 202 ensures that TVOC can efficiently enter the adsorption catalyst layer 201, thereby achieving rapid adsorption and purification. In the adsorption state, the adsorption catalyst layer 201 continuously adsorbs TVOC. Over time, the adsorbent gradually approaches saturation. However, in the catalytic degradation state, the adsorbent releases the adsorbed TVOC and undergoes degradation, thereby restoring its adsorption capacity. The permeability of the encapsulation layer 202 not only allows TVOC to enter the adsorption catalyst layer 201 but also promotes airflow during degradation, accelerating the release and degradation of TVOC. This design enables the adsorption catalyst layer 201 to achieve a dynamic balance between adsorption and degradation, extending its service life. The encapsulation layer provides physical support for the dynamic balance of the adsorption catalyst layer 201 by controlling the entry and exit of gas. This synergistic effect ensures that the device maintains high purification capacity throughout long-term use, reducing the frequency of module replacement for users. The adsorption and catalytic performance of the adsorption catalyst layer 201 is closely related to temperature. Low temperatures are beneficial to the adsorption capacity of the adsorbent, while high temperatures contribute to the activity of the catalytic material and the release of TVOCs. The encapsulation layer 202 provides more suitable working conditions for the adsorption catalyst layer 201 by regulating temperature changes. This synergistic effect enables the device to operate efficiently in different temperature environments, especially in environments with large temperature fluctuations, such as refrigerators. The encapsulation layer 202 isolates the adsorption catalyst layer 201 from the external environment, preventing the adsorbent and catalytic material from being directly exposed in the storage cavity 101. This not only protects the adsorption catalyst layer 201 but also avoids possible chemical leakage or contamination. The isolation function of the encapsulation layer 202, combined with the degradation function of the adsorption catalyst layer 201, ensures that the device will not cause secondary contamination to the food or environment in the storage cavity 101 during operation, significantly improving the safety and reliability of the device.

[0028] See also Figures 1 to 4 As shown, the adsorption catalyst layer 201 includes a support 211 and a catalyst. Multiple mesopores 212 are evenly distributed on the support 211, and the catalyst is loaded within the mesopores 212. Volatile organic compounds (TVOCs) in the storage cavity 101 are adsorbed by both the mesopores 212 and the catalyst. The support 211 is the basic structure of the adsorption catalyst layer 201 and is made of porous materials such as diatomaceous earth, activated carbon fiber, and alumina. Multiple mesopores 212 are evenly distributed on its surface and inside, providing numerous adsorption sites for efficient TVOC capture. The catalyst is loaded within the mesopores 212 of the support 211. The catalyst's role is to decompose the adsorbed TVOCs into harmless substances (such as carbon dioxide and water) under appropriate conditions (such as increased temperature).

[0029] Specifically, when the cover 3 is closed, the temperature inside the storage cavity 101 gradually decreases. TVOC in the storage cavity 101 enters the adsorption catalyst layer 201 through the micropores of the encapsulation layer 202. TVOC molecules are first captured by the mesopores 212 of the support 211. The high specific surface area and suitable pore size distribution of the mesopores 212 allow TVOC molecules to efficiently enter the pores and adhere to the pore walls. TVOC molecules also undergo chemical adsorption with the catalyst supported in the mesopores 212. The active sites on the catalyst surface can form chemical bonds with the TVOC molecules, further enhancing the adsorption capacity. When the cover 3 is opened, the storage cavity 101 comes into contact with the external environment, and the temperature rises rapidly. As the temperature rises, the TVOC molecules adsorbed in the mesopores 212 gradually gain sufficient energy and are released from the pores. The catalyst supported in the mesopores 212 is activated at the higher temperature, and its surface active sites can efficiently catalyze TVOC degradation. After degradation is complete, the air inside the storage cavity 101 is purified, and the TVOC concentration is significantly reduced. Simultaneously, the adsorption catalyst layer 201 returns to its initial state, ready for the next adsorption process.

[0030] In this embodiment, the mesopores 212 have an extremely high specific surface area, meaning that a unit volume of the support 211 can provide a large number of adsorption sites. This high specific surface area enables the adsorption catalyst layer 201 to efficiently capture volatile organic compounds (TVOCs) in the storage cavity 101, thereby significantly improving the adsorption efficiency. The pore size of the mesopores 212 matches the size of the TVOC molecules, enabling effective adsorption of organic molecules of various sizes. This pore size distribution not only improves the adsorption capacity but also enhances the selective adsorption capacity for specific TVOCs. Loading the catalyst in the mesopores 212 allows the active sites of the catalyst to be uniformly distributed inside and on the surface of the support 211. This distribution maximizes the contact area between the catalyst and TVOC molecules, thereby improving the efficiency of the catalytic reaction. The mesopore structure 212 facilitates rapid mass transfer of TVOC molecules during adsorption and degradation. During the adsorption stage, TVOC molecules can rapidly enter the mesopores 212 and be adsorbed; during the degradation stage, the released TVOC molecules can rapidly diffuse to the catalyst surface, thereby accelerating the catalytic reaction. The catalyst in mesoporous 212 plays a dual role in adsorption and degradation. At low temperatures, the active sites on the catalyst surface can assist physical adsorption, further enhancing the adsorption capacity. At high temperatures, the catalyst is activated, efficiently catalyzing the degradation of adsorbed TVOCs. This synergistic effect enables the adsorption catalyst layer 201 to achieve a dynamic balance between adsorption and degradation, extending its service life. Through periodic adsorption and degradation, the adsorption catalyst layer 201 can promptly release and degrade the adsorbed TVOCs, avoiding the problem of adsorbent failure after saturation. This dynamic balance mechanism significantly improves the stability and reliability of the device. By loading the catalyst in mesoporous 212, the adsorbed TVOCs can be immediately degraded into harmless substances (such as carbon dioxide and water) each time the cover 3 is opened. This immediate degradation mechanism effectively prevents secondary pollution caused by the release of TVOCs after adsorbent saturation, significantly improving the safety of the device. The mesoporous 212 structure provides physical protection for the catalyst, preventing it from deactivating due to physical collisions or chemical corrosion during long-term use. This protection mechanism significantly extends the catalyst's service life.

[0031] See also Figures 1 to 4As shown, a temperature-responsive layer is provided on the surface of the carrier 211, and the temperature-responsive layer covers the inlet area of ​​the mesopore 212. The temperature-responsive layer adjusts the opening and closing state of the channel according to the temperature change of the storage cavity 101, thereby forming a temperature-sensitive gating structure at the inlet of the mesopore 212. The temperature-responsive layer automatically adjusts the opening and closing state of the mesopore 212 channel when the temperature of the storage cavity 101 changes; for example, the channel opens at low temperatures and contracts at high temperatures, forming an intelligent temperature-sensitive gating mechanism.

[0032] Specifically, after sensing a low-temperature environment, the temperature-responsive layer automatically adjusts the entrance area of ​​the mesopore 212 channels, opening them. This open state allows TVOC molecules in the storage cavity 101 to enter the mesopore 212. The TVOC molecules enter the mesopore 212 through the open channels and are adsorbed on the surface of the mesopore 212 of the carrier component 211. The high specific surface area and suitable pore size distribution of the mesopore 212 enable TVOC molecules to efficiently enter the channels and adhere to the pore walls. When the cover 3 is opened, the storage cavity 101 comes into contact with the external environment, and the temperature rises rapidly. After sensing the temperature rise, the temperature-responsive layer automatically adjusts the entrance area of ​​the mesopore 212 channels, closing them. The TVOC molecules adsorbed in the mesopore 212 gain sufficient energy when the temperature rises and are gradually released from the inside of the channels, eventually being decomposed into harmless small molecules (such as carbon dioxide and water).

[0033] In this embodiment, the temperature-responsive layer is a temperature-sensitive material that can automatically adjust the opening and closing state of the mesopores 212 according to temperature changes within the storage cavity 101. This intelligent adjustment function allows the device to selectively adsorb TVOC based on temperature changes, avoiding excessive adsorption of impurities at high temperatures, thereby improving the targeting and efficiency of adsorption. By intelligently adjusting the opening and closing state of the pores, the temperature-responsive layer achieves a dynamic balance between adsorption and degradation processes. This dynamic balance mechanism enables the adsorption catalyst layer 201 to efficiently switch between adsorption and degradation, extending its service life. After each degradation process, the device returns to its initial state, ready for the next adsorption process. This regenerative capability allows the device to operate stably for extended periods, reducing the frequency of module replacements for users.

[0034] See also Figures 1 to 4As shown, the temperature-responsive layer is a thermosensitive coating. When the cover 3 is closed, the thermosensitive coating is in a hydrophilic, expanded state, allowing organic compounds in the storage cavity 101 to enter the interior of the mesopores 212, and the degradation module 2 is in an adsorption state. When the cover 3 is opened, the thermosensitive coating is in a hydrophobic, contracted state, exerting an outward thrust on the products after the degradation of organic compounds, and the degradation module 2 is in a catalytic degradation state. The thermosensitive coating covers the surface of the carrier 211, especially the pore entrance area of ​​the mesopores 212. This coating is temperature-sensitive and can exhibit a hydrophilic, expanded state or a hydrophobic, contracted state at different temperatures.

[0035] Specifically, when the cover 3 is closed, the temperature inside the storage cavity 101 gradually decreases. The low temperature causes the temperature-sensitive coating to exhibit a hydrophilic and relaxed state, and the pores expand and open. This state allows TVOC molecules in the storage cavity 101 to smoothly enter the mesopore 212. The TVOC molecules enter the mesopore 212 through the expanded pores and are adsorbed on the surface of the mesopore 212 of the carrier 211. They then undergo chemical adsorption with the catalyst loaded in the mesopore 212, further enhancing the adsorption capacity. When the cover 3 is opened, the storage cavity 101 comes into contact with the external environment, and the temperature rises rapidly. The high temperature causes the temperature-sensitive coating to exhibit a hydrophobic contraction state, and the pores contract and close. This state not only prevents external impurities from entering the mesopores 212, but also generates an outward thrust on the degradation products. Although the pores are closed, the TVOC molecules adsorbed in the mesopores 212 gain enough energy when the temperature rises and are gradually released from the inside of the pores. The catalyst loaded in the mesopores 212 is activated at a higher temperature, and its surface active sites can efficiently catalyze the oxidation of TVOC. The released TVOC molecules come into contact with the active sites on the catalyst surface and undergo a catalytic oxidation reaction, and are finally decomposed into harmless small molecules (such as carbon dioxide and water). The hydrophobic contraction state of the temperature-sensitive coating generates an outward thrust on the degradation products, expelling the degradation products (such as CO2 and H2O) from the pores and further purifying the air in the storage cavity 101.

[0036] In this embodiment, the temperature-sensitive coating is a temperature-sensitive material that can automatically adjust its physical and chemical properties according to changes in ambient temperature. This coating covers the inlet area of ​​the mesopores 212 of the carrier component 211. Through changes in its hydrophilic and hydrophobic states, it achieves intelligent control of the pores. The temperature-sensitive coating can sense temperature changes within the storage cavity 101 and automatically adjust the opening and closing state of the pores accordingly. This intelligent control mechanism allows the device to automatically switch operating modes according to different usage scenarios (such as the lid 3 being closed or open) without the need for additional control equipment. The response of the temperature-sensitive coating depends entirely on temperature changes, requiring no additional energy input, which aligns with the energy-saving design concept of refrigerators. When the cover 3 is closed and the temperature of the storage cavity 101 decreases, the temperature-sensitive coating enters a hydrophilic expansion state. At this time, the pores of the coating expand and open, allowing volatile organic compounds (TVOCs) in the storage cavity 101 to enter the mesopores 212. The hydrophilic expansion state fully opens the pores of the temperature-sensitive coating, providing a smooth channel for TVOC molecules to enter the mesopores 212. The hydrophilicity makes it easier for the coating surface to adsorb TVOC molecules, further improving the adsorption efficiency. This setting fully utilizes the high adsorption capacity of the adsorbent at low temperatures, ensuring efficient capture of TVO under low-temperature conditions. After entering the mesopores 212, TVOC molecules are adsorbed on the surface of the mesopores 212 and on the catalyst, gradually accumulating and awaiting subsequent degradation. The temperature-sensitive coating achieves a dynamic balance between adsorption and degradation processes by switching between the hydrophilic expansion state and the hydrophobic contraction state. This dynamic balance mechanism enables the adsorption catalyst layer 201 to switch efficiently between adsorption and degradation, extending its service life.

[0037] As a specific implementation, the mesoporous 212 is made of silicon material (pore size 5-20nm). Mesoporous 212 silica is a widely studied material in nanomaterials science. Its specific surface area and easily modifiable surface properties make it widely used in adsorption, drug loading, catalysis, and other fields. The catalyst is a biological enzyme that degrades TVOC (such as lipase, formaldehyde dehydrogenase, polyphenol oxidase, etc.). The mesoporous 212 silica material can adsorb TVOC molecules within the degradation range. A temperature-sensitive coating covers the outer surface of the mesoporous 212 silica material and the pore entrances (without blocking the internal pores). The temperature-sensitive coating is hydrophilic and expandable at temperatures <16℃, with the pore entrances fully open, allowing TVOC to enter freely. However, when the temperature is >16℃, it hydrophobically shrinks, and the molecular chain diameter shrinks, forming a squeezing effect that pushes the TVOC adsorbed in the pores to the surface of the mesoporous 212 (simulating a pumping action). The encapsulation layer 202 is made of food-grade film with high air permeability, allowing TVOC molecules to pass through. In this embodiment, the PNIPAM chain undergoes a dramatic conformational change (expansion / contraction) when the temperature changes. This is a fundamental physicochemical property. This conformational change is cleverly applied to the entrance of the mesoporous 212 channel, so that it not only acts as a switch, but also actively pushes the adsorbed TVOC molecules to the inner surface of the channel loaded with biological enzymes by utilizing the physical force of contraction. This dynamic and active pumping or squeezing concept goes beyond simple on / off control.

[0038] See also Figures 1 to 6As shown, the device also includes a heating module 4, which is thermally coupled to the degradation module 2. The heating module 4 provides heat energy to the degradation module 2 to trigger or promote its catalytic degradation function. Introducing the heating module 4 into the degradation device and achieving thermal coupling with the degradation module 2 can significantly improve the catalytic degradation efficiency of the degradation module 2. The thermal coupling can be achieved through direct contact or heat transfer through a certain spatial interval. The key is to ensure that the heat generated by the heating module 4 can be effectively transferred to the degradation module 2. Here are some specific ways to achieve thermal coupling: Physical contact, that is, direct contact between the heating module 4 and the degradation module 2, such as tightly attaching the heating element (such as heating wire, heating plate 402) to the encapsulation layer 202 of the degradation module 2. This setting can ensure that heat is directly transferred to the degradation module 2, reducing heat loss. Direct contact thermal coupling can ensure efficient heat transfer while saving space; A certain air gap is left between the heating module 4 and the degradation module 2, and heat is transferred to the degradation module 2 through air convection. This setting can avoid direct friction or damage between the heating module 4 and the degradation module 2. A thermally conductive medium (such as thermally conductive silicone, thermally conductive gel, etc.) can be placed between the heating module 4 and the degradation module 2. These media can fill the air gap and improve the thermal conduction efficiency; Using a radiant heating element (such as an infrared heater) as the heating module 4, heat is transferred to the degradation module 2 through radiation. This setting does not require physical contact, and heat can directly act on the degradation module 2 through radiation.

[0039] Specifically, the degradation module 2 includes a carrier 211, a catalyst, and a temperature-sensitive coating. The carrier 211 has mesopores 212 and supports the catalyst for adsorbing and degrading volatile organic compounds (TVOC). The temperature-sensitive coating covers the entrance area of ​​the mesopores 212 and adjusts the opening and closing of the pores according to temperature changes. When the cover 3 is closed, the temperature inside the storage cavity 101 gradually decreases. The low temperature causes the temperature-sensitive coating to exhibit a hydrophilic and relaxed state, and the pores expand and open. This state allows TVOC molecules in the storage cavity 101 to smoothly enter the interior of the mesopores 212. If the refrigerator is left on for a long time, the temperature at the location of the degradation module 2 may become too low (<0℃), which can easily lead to freeze-thaw denaturation of enzyme molecules. In this case, the heating module 4 needs to be turned on to keep or control the temperature. Once the temperature rises to 4℃, the heating module 4 is turned off. If the storage chamber 101 is kept at a low temperature for a long time (continuously at 0~8℃ for ≥48h), the temperature-sensitive material will continue to expand and the enzyme activity will remain at a low level, resulting in the TVOC being unable to be degraded in time after adsorption. At this time, the heating module 4 will be turned on, and the heating module 4 will be turned off when the temperature is detected to rise to 16℃.

[0040] In this embodiment, the heating module 4 automatically activates when the temperature is detected to be below 0°C, providing heat to the degradation module 2 to maintain its temperature at around 4°C, preventing enzyme molecules from freezing and thawing and denaturing. By maintaining a suitable temperature, the heating module 4 protects the activity of the catalyst, ensuring that it can maintain high catalytic efficiency even in low-temperature environments. When the temperature rises to 4°C, the heating module 4 automatically shuts off to avoid overheating, save energy, and maintain a stable operating environment. When the storage chamber 101 is in a low-temperature state for a long period (0~8°C, continuous duration ≥48 hours), the temperature-sensitive material continues to expand, and the enzyme activity remains at a low level, resulting in TVOCs not being degraded in time after adsorption and accumulating excessively. When the long-term low-temperature state is detected, the heating module 4 activates, raising the temperature to 16°C to activate the catalyst and promote the degradation reaction of TVOCs. By increasing the temperature, the heating module 4 significantly increases the rate of the degradation reaction, ensuring that the adsorbed TVOCs can be degraded in time and preventing excessive accumulation in the degradation module 2. The heating module 4 automatically shuts off when the temperature reaches 16°C, ensuring that the degradation module 2 returns to a suitable low-temperature state after efficient degradation, maintaining dynamic equilibrium. In different low-temperature scenarios, the operating efficiency and stability of degradation module 2 are affected by temperature changes. Heating module 4, through intelligent temperature control, ensures that degradation module 2 can operate stably in different low-temperature scenarios, avoiding performance degradation caused by temperature fluctuations. By preventing enzyme molecule freeze-thaw denaturation and maintaining a suitable operating temperature, heating module 4 significantly extends the service life of degradation module 2 and reduces maintenance costs. In this embodiment, the synergistic effect of heating module 4 and temperature-sensitive coating ensures that degradation module 2 achieves a dynamic balance between adsorption and degradation. After each degradation is completed, the device returns to its initial state, ready for the next adsorption process. This synergistic effect allows the device to automatically switch operating modes according to the opening and closing action of the cover 3, without manual intervention from the user, thus improving the user experience.

[0041] See also Figures 1 to 6 As shown, the heating module 4 includes a mounting panel 401 and multiple heating elements 402. The multiple heating elements 402 are evenly distributed on the mounting panel 401. The degradation module 2 has a first end face and a second end face. The first end face faces the cover 3, and the mounting panel 401 is arranged opposite to the second end face.

[0042] In this embodiment, multiple heating elements 402 are evenly distributed on the mounting panel 401, ensuring that heat is evenly transferred to the second end face of the degradation module 2. This even distribution avoids local overheating or insufficient heat, ensuring uniform temperature distribution throughout the degradation module 2. By positioning the mounting panel 401 opposite to the second end face of the degradation module 2, heat can be directly transferred to the critical areas of the degradation module 2, reducing heat loss and improving heat conduction efficiency. Positioning the heating module 4 opposite to the degradation module 2 makes the entire device more compact, saving space and making it particularly suitable for space-constrained devices such as refrigerators. This arrangement facilitates the integration of the heating module 4 and the degradation module 2, simplifying the overall device setup and improving reliability and stability. The heating module 4 can quickly raise the temperature of the degradation module 2 when needed, ensuring the catalytic degradation reaction occurs within a more efficient temperature range, thereby improving degradation efficiency. Through precise control and dynamic adjustment, the heating module 4 only activates when needed, avoiding unnecessary energy consumption and conforming to the energy-saving design concept.

[0043] See also Figures 1 to 7 As shown, the housing 1 has a return air inlet 102 and a return air outlet 103. A fan is installed at the return air inlet 102, which sends air from the external environment into the storage cavity 101, and the air in the storage cavity 101 is discharged from the return air outlet 103. During the adsorption stage, the micro fan at the return air inlet is turned on to accelerate air circulation and enhance the adsorption capacity of the porous medium material. When the user opens the door, the micro fan is turned off, allowing the degradation module 2 to degrade the adsorbed TVOC.

[0044] Specifically, when the cover 3 is closed, the TVOC content detected in the storage cavity 101 is >1.50 mg / m³. 3 The air entering the storage chamber 101 circulates under the action of a micro fan. The air first enters the storage chamber 101 through the return air inlet 102, then passes through the degradation module 2 (carrier 211 and catalyst), and finally exits from the return air outlet 103. This air circulation accelerates the airflow within the storage chamber 101, allowing volatile organic compounds (TVOCs) to come into contact with the adsorbent material (such as the mesoporous material 212) in the degradation module 2 more quickly, thereby improving adsorption efficiency. When the user opens the cover 3, the micro fan turns off, and the air circulation within the storage chamber 101 stops. Without air circulation, the air within the storage chamber 101 remains relatively still, and the degradation module 2 degrades the adsorbed TVOCs.

[0045] In this embodiment, during the adsorption stage, a fan draws air from the external environment into the storage cavity 101 through the return air inlet 102, creating a circulating flow within the cavity. This air circulation accelerates the contact between volatile organic compounds (TVOCs) and the adsorbent material (such as the mesoporous material 212) in the degradation module 2, thereby significantly improving the adsorption efficiency. Through air circulation, TVOCs can be more evenly distributed throughout the degradation module 2, ensuring the high efficiency and uniformity of the adsorption process and avoiding the problem of insufficient local adsorption. During the degradation stage, when the user opens the cover 3, the fan turns off, and the air in the storage cavity 101 becomes relatively still. This static environment facilitates sufficient contact between the catalyst in the degradation module 2 and the adsorbed TVOCs, improving the efficiency of the degradation reaction. After the fan is turned off, air circulation stops, reducing the interference of airflow on the degradation process and ensuring that the degradation reaction can proceed under more stable conditions.

[0046] In one specific implementation, the housing 1 has a square structure, with one side being an open structure. A cover plate is installed on the open structure, and sliding grooves are provided on both sides of the housing 1, allowing the cover plate to slide up and down along the grooves to open and close. The degradation device and heating device are installed on the inner wall of the housing 1 via snap-fit, specifically on the side wall of the housing 1 opposite to the open structure. When the cover plate is opened, air can flow smoothly into the degradation module 2. Two degradation modules 2 and a heating module 4 are provided in the housing 1. In other embodiments, the degradation device also includes a detection module, a timing module, a control module, and a judgment module. The detection module contains a temperature sensor and an odor sensor, which can detect temperature and odor changes within the degradation zone. The timing module can record the duration of the degradation zone in a low-temperature environment. Each module is connected to the control module, which performs corresponding control based on the information fed back from the other modules.

[0047] In one specific implementation, the two end faces of the carrier 211 are respectively provided with temperature response layers, and an encapsulation layer 202 is attached to the outside of each temperature response layer. The heating module 4 is installed inside the degradation device. In other embodiments, it is only necessary to ensure that the heat generated by the heating module 4 can be transferred to the encapsulation layer 202 and then to the temperature response layer.

[0048] See also Figures 1 to 6 As shown, the specific working process of the degradation device is as follows: When lid 3 is closed, the refrigerator operates in a low-temperature environment for a continuous period of less than 48 hours, and the TVOC content detected in storage cavity 101 is less than 1.50 mg / m³. 3The temperature in the storage cavity 101 is maintained within the first temperature range (0-8℃), which is the normal refrigeration temperature of the refrigerator. It is lower than the LCST (16℃) of the temperature-sensitive coating. The temperature-sensitive coating is stretched, the mesopore 212 channels are open, and TVOC diffuses into the channels through the concentration difference. It is adsorbed by the surface groups of the mesopore 212 and enzyme molecules (low activity state). The degradation module 2 is in the adsorption state. The degradation module 2 adsorbs volatile organic compounds in the storage cavity 101. When the lid 3 is opened, outside air enters, and the local temperature inside the refrigerator rises. The temperature sensor detects that the temperature has risen to 16~25℃, and the temperature of the storage cavity 101 is maintained within the second temperature range. The second temperature range is greater than the first temperature range. As the temperature in the storage cavity 101 rises, the degradation module 2 is in a catalytic degradation state. The temperature-sensitive coating shrinks, squeezing TVOC in the pores to the surface of the mesopores 212. At the same time, the temperature rise increases enzyme activity, and enzyme molecules specifically bind to TVOC, degrading TVOC molecules (such as formaldehyde → CO2 + H2O, toluene → benzoic acid → CO2 + H2O). The degradation products diffuse into the refrigerator through the encapsulation layer 202 and are metabolized by naturally occurring lactic acid bacteria, yeast, etc. The degradation module 2 degrades the adsorbed volatile organic compounds. When the TVOC content detected in storage cavity 101 is >1.50 mg / m³ 3 During the adsorption phase, the micro fan at the return air vent is turned on to accelerate air circulation and enhance the adsorption capacity of the medium porous material. When the user opens the door, the micro fan is turned off, allowing the degradation module 2 to degrade the adsorbed TVOC.

[0049] It also includes, when the heating module 4 is provided, actively intervening in the temperature rise degradation, specifically as follows: When the temperature inside the storage chamber is too low (<0℃), if the refrigerator is turned on for a long time, the temperature at the location of the degradation module 2 will be too low (<0℃), which may cause the enzyme molecules to denature due to freeze-thaw. At this time, the heating module 4 needs to be turned on to keep it warm or control the temperature. When the temperature rises to 4℃, the heating module 4 is turned off. When the degradation zone is kept at a low temperature for a long time (continuously at 0~8℃ for ≥48h), the temperature response layer continues to expand and the enzyme activity remains at a low level, resulting in the inability to degrade TVOC in time after adsorption. At this time, heating module 4 is turned on, and heating module 4 is turned off when the temperature is detected to rise to 16℃.

[0050] A refrigeration appliance includes a degradation device, wherein the degradation device is as described above. When the specific refrigeration appliance is a refrigerator, the cover 3 in the degradation device is the refrigerator's door, and the shell 1 is installed in the refrigerator in the form of a drawer.

[0051] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0052] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above are only preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A degradation device, characterized in that, include: The shell (1) and the degradation module (2); The inner cavity of the housing (1) is a storage cavity (101), and the housing (1) is provided with a cover (3) that can be opened or closed, so that the storage cavity (101) will generate temperature changes during the process of opening or closing the cover (3); The degradation module (2) is installed in the housing (1). The working state of the degradation module (2) is driven by the temperature change of the storage cavity (101). The working state of the degradation module (2) includes adsorption state and catalytic degradation state. When the cover (3) is closed, the degradation module (2) is in the adsorption state, and the degradation module (2) adsorbs the organic compounds in the storage cavity (101); when the cover (3) is opened, the degradation module (2) is in the catalytic degradation state, and the degradation module (2) degrades the adsorbed organic compounds.

2. The degradation device according to claim 1, characterized in that, The degradation module (2) includes an adsorption catalyst layer (201) and an encapsulation layer (202). The adsorption catalyst layer (201) is encapsulated in the encapsulation layer (202). Organic compounds in the storage cavity (101) pass through the encapsulation layer (202) and are adsorbed by the adsorption catalyst layer (201).

3. The degradation device according to claim 2, characterized in that, The adsorption catalyst layer (201) includes a support (211) and a catalyst. The support (211) has a plurality of mesopores (212) evenly distributed on it. The catalyst is loaded in the mesopores (212). The organic compounds in the storage cavity (101) are adsorbed by the mesopores (212) and the catalyst.

4. The degradation device according to claim 3, characterized in that, The surface of the carrier (211) is provided with a temperature-responsive layer, and the temperature-responsive layer covers the channel entrance area of ​​the mesopore (212). The temperature-responsive layer adjusts the opening and closing state of the mesopore (212) according to the temperature change of the storage cavity (101), thereby forming a temperature-sensitive gating structure at the channel entrance of the mesopore (212).

5. The degradation device according to claim 4, characterized in that, The temperature-responsive layer is a thermosensitive coating. When the cover (3) is closed, the thermosensitive coating is in a hydrophilic and expansive state, and the organic compounds in the storage cavity (101) enter the interior of the mesopore (212), and the degradation module (2) is in the adsorption state. When the cover (3) is opened, the thermosensitive coating is in a hydrophobic and contractile state, and it exerts an outward thrust on the products after degrading the organic compounds, and the degradation module (2) is in the catalytic degradation state.

6. The degradation device according to claim 1, characterized in that, It also includes a heating module (4), which is thermally coupled to the degradation module (2). The heating module (4) provides heat energy to the degradation module (2) to trigger or promote the catalytic degradation function of the degradation module (2).

7. The degradation device according to claim 6, characterized in that, The heating module (4) includes a mounting panel (401) and a plurality of heating elements (402), the plurality of heating elements (402) are evenly distributed on the mounting panel (401), the degradation module (2) has a first end face and a second end face, the first end face faces the cover (3), and the mounting panel (401) is disposed opposite to the second end face.

8. The degradation device according to claim 1, characterized in that, The housing (1) is provided with a return air inlet (102) and a return air outlet (103). A fan is provided at the return air inlet (102). The fan sends air from the external environment into the storage cavity (101), and the air in the storage cavity (101) is discharged from the return air outlet (103).

9. A refrigeration appliance, comprising a degradation device, characterized in that, The degradation device is the degradation device according to any one of claims 1 to 8.

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