Air purification device and refrigerator

Abstract

The present invention relates to an air purification device and a refrigerator, wherein the air purification device comprises: a physical adsorbent; a Joule heat effect material, which acts on the physical adsorbent, one end of which is suitable for being connected to the positive electrode of a power source, and the other end of which is suitable for being connected to the negative electrode of a power source, and is suitable for heating the physical adsorbent to regenerate the physical adsorbent; the specific heat capacity of the Joule heat effect material is P, P≤400J / (kg·K). At the same time, since the specific heat capacity of the Joule heat effect material in the present invention is relatively small, the heat transferred to the surrounding air after being powered on and heated is low, and it is not easy to affect the ambient temperature in household appliances. Even if it is used in a refrigerator, it will not destroy the low temperature environment in the refrigerator, and the user is not easily scalded by it when contacting the air purification device. Therefore, the air purification device of the present invention can overcome the defects of the air purification device in the prior art that it is easy to affect the ambient temperature in household appliances and even scald users, and is suitable for application in household appliances.

Description

Technical Field

[0001] The present invention relates to the technical field of air purification equipment, and in particular to an air purification device and a refrigerator. Background Art

[0002] Physical air purification devices can utilize the characteristics of gas diffusion to adsorb odorous gases such as ammonia, hydrogen sulfide, mercaptan and methylamine in an adsorption manner, thereby effectively removing odors and purifying the air. It has a large market share in the air purification device market due to its low price, convenience and ease of use. In order to prevent the physical adsorbent in the air purification device from losing its adsorption effect and breeding bacteria, the air purification device in the prior art is generally provided with an electric heating wire for heating the physical adsorbent. The electric heating wire can be turned on regularly to reduce the physical adsorbent and kill the bacteria growing on the physical adsorbent. However, such an air purification device is only applicable to industrial production. When it is used in a home or household appliances, the heat released by the electric heating wire is easy to affect the ambient temperature and the use effect of household appliances (for example, when the air purification device is used in an air conditioner, it will cause the low temperature environment in the refrigerator to be destroyed, resulting in an impact on the cooling effect of the refrigerator), and even cause burns to the user. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the air purification device in the prior art easily affects the home environment temperature and even scalds the user, thereby providing an air purification device and refrigerator suitable for use in the home.

[0004] In order to solve the above problems, the first aspect of the present invention provides an air purification device, including: a physical adsorbent; a Joule thermal effect material, which acts on the physical adsorbent, one end of which is suitable for being connected to the positive electrode of a power supply, and the other end of which is suitable for being connected to the negative electrode of the power supply, and is suitable for heating the physical adsorbent to regenerate the physical adsorbent; the specific heat capacity of the Joule thermal effect material is P, P≤400J(kg·K).

[0005] Furthermore, the power supply is a pulse power supply.

[0006] Furthermore, the Joule heating effect material includes:

[0007] A first carbon paper, one end of which is suitable for connecting to the positive electrode of the power source, and the other end of which is suitable for connecting to the negative electrode of the power source;

[0008] The second carbon paper is stacked with the first carbon paper and connected in parallel with the first carbon paper, and the physical adsorbent is arranged between the first carbon paper and the second carbon paper.

[0009] Furthermore, the first carbon paper and / or the second carbon paper is wavy.

[0010] Furthermore, the resistance of the first carbon paper and the second carbon paper is in the range of 0.1-1Ω; the voltage peak of the power supply is in the range of 18-22V, and the width of the power supply is in the range of 40-60ms.

[0011] Furthermore, the air purification device also includes a shell, and the shell has two opposite side walls respectively provided with an air inlet and an air outlet. The first carbon paper and the second carbon paper are arranged in the shell, and the first ends of the first carbon paper and the second carbon paper are arranged toward the air inlet, and the second ends are arranged toward the air outlet.

[0012] Furthermore, the Joule heat effect material is a nickel foam mesh, the nickel foam mesh is bent into a multi-layer structure, and the physical adsorbent is embedded between two adjacent layers of the nickel foam mesh.

[0013] Furthermore, the resistance of the nickel foam mesh is in the range of 0.17-0.18Ω; the diameter of the nickel wire of the nickel foam mesh is in the range of 55-70μm; and the voltage of the power supply is in the range of 0.8-1.2V.

[0014] Furthermore, the thickness of the physical adsorbent is d1,5mm≤d1≤10mm.

[0015] Furthermore, the air purification device is a refrigerator deodorizer.

[0016] A second aspect of the present invention provides a refrigerator, comprising the air purification device provided by the first aspect of the present invention.

[0017] The present invention has the following advantages:

[0018] 1. It can be seen from the above technical solution that the air purification device of the first aspect of the present invention includes a physical adsorbent and a Joule thermal effect material. When the physical adsorbent reaches a saturated state, the Joule thermal effect material can be energized and emit heat to heat the physical adsorbent, thereby desorbing the harmful gas adsorbed on the physical adsorbent and killing the bacteria grown on the physical adsorbent. At the same time, since the specific heat capacity of the Joule thermal effect material in the present application is relatively small, the heat transferred to the surrounding air after being energized and heated is low, and it is not easy to affect the ambient temperature in household appliances. Even if it is used in a refrigerator, it will not destroy the low temperature environment in the refrigerator, and the user is not easily scalded by it when it comes into contact with the air purification device. Therefore, the air purification device of the present invention can overcome the defects of the air purification device in the prior art that it is easy to affect the ambient temperature in household appliances and even scald users, and is suitable for application in household appliances.

[0019] 2. The power source is a pulse power source, which has high heating efficiency and short heating time. It can make the Joule heat effect material obtain high temperature for tens of milliseconds and then quickly cool down to room temperature, so that the byproducts and pollutants on the physical adsorbent can be desorbed from the site while ensuring the regeneration of the physical adsorbent. At the same time, due to the short heating time, the low specific heat capacity material generates less heat and is less likely to affect the ambient temperature in the household appliance.

[0020] 3. The Joule thermal effect material is selected as carbon paper. Specifically, the Joule thermal effect material includes a first carbon paper and a second carbon paper. Among them, one end of the first carbon paper is suitable for connecting to the positive electrode of the power supply, and the other end is suitable for connecting to the negative electrode of the power supply. The second carbon paper is stacked with the first carbon paper and connected in parallel with the first carbon paper, and the physical adsorbent is arranged between the first carbon paper and the second carbon paper. At this time, the first carbon paper and the second carbon paper are respectively located on both sides of the physical adsorbent, which can ensure that the physical adsorbent is fully heated so that the pollutants and by-products thereon are desorbed.

[0021] 4. The air purification device also includes a shell. An air inlet and an air outlet are respectively arranged on two opposite side walls in the shell. The first carbon paper and the second carbon paper are arranged in the shell. The first end of the first carbon paper and the second carbon paper is arranged toward the air inlet, and the second end is arranged toward the air outlet. This allows air to flow into the shell from the air inlet, pass through the physical adsorbent between the first carbon paper and the second carbon paper, and then be discharged from the air outlet on the shell. The air entering the shell can pass through the physical adsorbent from the length direction of the physical adsorbent and be fully purified by the physical adsorbent, and can avoid the carbon paper with large wind resistance, so that the gas can pass through the air purification device smoothly and be absorbed. In order to reduce the manufacturing cost of the air purification device while avoiding damage to the shell when the Joule thermal effect material is heated, the part of the shell in contact with the Joule thermal effect material is made of heat-resistant materials such as PA66 fiber-reinforced plastic and PPS plastic. The main part of the shell is made of low-cost ABS plastic.

[0022] 5. The Joule thermal effect material is selected as nickel foam mesh. The nickel foam mesh 213 is bent into a multi-layer structure. The physical adsorbent is embedded between two adjacent layers of the nickel foam mesh. Since the nickel foam mesh has a small resistance, it is set in a long strip shape to increase the resistance of the nickel foam mesh, so that the nickel foam mesh can fully heat the physical adsorbent after being powered on. The diameter of the nickel wire of the nickel foam mesh is in the range of 55-70μm. The thickness of the physical adsorbent is d1,5mm≤d1≤10mm. The voltage of the power supply is in the range of 0.8-1.2v. A 1.0V DC voltage is applied to the nickel foam, the current is about 6A, and the temperature rise of the nickel foam can reach 100℃. Continuous heating for 5 minutes can achieve the regeneration of the adsorption performance of the physical adsorbent. When the nickel foam mesh is bent into a multi-layer structure, the two adjacent layers of nickel foam mesh can fully heat the physical adsorbent in the middle to ensure that the physical adsorbent is fully reduced. Since the resistance value of the nickel foam mesh is relatively stable under different voltages, it can also ensure the stability of the current in the circuit under high voltage input. The nickel foam mesh will not burn or fuse due to excessively high current values, which helps to increase the service life of the air purification device.

[0023] 6. The refrigerator of the second aspect of the present invention includes the air purification device of the first aspect of the present invention, which can absorb odorous gases such as ammonia, hydrogen sulfide, mercaptan and methylamine in the refrigerator with the help of the air purification device without destroying the low-temperature environment in the refrigerator. When a user accidentally touches the air purification device, it is not easy to be scalded by the shell of the air purification device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 The first carbon paper, the second carbon paper and the physical adsorbent of the air purification device of Example 1 of the present invention are shown;

[0026] Figure 2 This is a schematic structural diagram of an air purification device according to Embodiment 1 of the present invention;

[0027] Figure 3 The nickel foam mesh and the physical adsorbent of the air purification device of Example 2 of the present invention;

[0028] Figure 4 This is the current-voltage (IV) curve of the nickel foam mesh of the air purification device of Example 2 of the present invention.

[0029] Description of reference numerals:

[0030] 100. Air purification device; 1. Physical adsorbent; 211. First carbon paper; 212. Second carbon paper; 213. Foam nickel mesh; 3. Housing; 4. Power supply. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] Example 1

[0036] Figure 1 The first carbon paper, the second carbon paper and the physical adsorbent of the air purification device according to the first embodiment of the present invention are shown. Figure 2 FIG. 1 is a schematic diagram of the structure of an air purification device according to Embodiment 1 of the present invention. Figure 1 and Figure 2As shown, this embodiment relates to an air purification device 100, including a physical adsorbent 1 and a Joule thermal effect material. Among them, the Joule thermal effect material acts on the physical adsorbent 1. One end of the Joule is suitable for being connected to the positive pole of the power supply 4, and the other end is suitable for being connected to the negative pole of the power supply 4, suitable for heating the physical adsorbent 1 to regenerate the physical adsorbent 1. Among them, the specific heat capacity of the Joule thermal effect material is P, P≤400J / (kg·K). In order to ensure that the Joule thermal effect material can fully heat the physical adsorbent 1, preferably, 100≤P≤400J / (kg·K). At this time, the Joule thermal effect material can fully regenerate the physical adsorbent 1 without destroying the surrounding ambient temperature. Among them, the physical adsorbent 1 is preferably, but not limited to, a porous deodorant such as clay minerals, zeolites, and activated carbon. Although in this embodiment, the air purification device 100 is used in a refrigerator as a refrigerator deodorant, in other embodiments, it can also be used in other environments such as a vehicle deodorant.

[0037] It can be seen from the above technical scheme that the air purification device 100 of this embodiment includes a physical adsorbent 1 and a Joule heat effect material. When the physical adsorbent 1 reaches a saturated state, the Joule heat effect material can be powered on and emit heat to heat the physical adsorbent 1, thereby desorbing the harmful gas adsorbed on the physical adsorbent 1 and killing the bacteria growing on the physical adsorbent 1. Since the specific heat capacity of the Joule heat effect material is small, the heat transferred to the surrounding air after it is powered on and heated is low, and it is not easy to affect the ambient temperature in the household appliance. Even if it is used in a refrigerator, it will not destroy the low temperature environment in the refrigerator, and the user is not easy to be scalded by it when contacting the air purification device 100. Therefore, the air purification device 100 of the present invention can overcome the defects of the air purification device 100 in the prior art that it is easy to affect the ambient temperature in the household appliance and even scald the user, and is suitable for application in a home environment. At the same time, the air purification device 100 of this embodiment treats the odorous gas in a way of physical adsorption and high-temperature oxidation, which is non-irritating to the human body and does not cause discomfort to the user.

[0038] In this embodiment, the power source 4 can be selected as a DC power source, an AC power source or a pulse power source. When the power source 4 is selected as a pulse power source, its heating efficiency is high and the heating time is short, so that the Joule heat effect material can obtain a high temperature of tens of milliseconds and then quickly cool down to room temperature, so that the byproducts and pollutants on the physical adsorbent 1 can be desorbed from the site while ensuring the regeneration of the physical adsorbent 1. At the same time, due to the short heating time, the low specific heat capacity material generates less heat, which is less likely to affect the ambient temperature in the household appliance.

[0039] In this embodiment, the Joule thermal effect material may be carbon paper. Specifically, the Joule thermal effect material includes a first carbon paper 211 and a second carbon paper 212. Among them, one end of the first carbon paper 211 is suitable for connecting to the positive electrode of the power supply 4, and the other end is suitable for connecting to the negative electrode of the power supply 4. The second carbon paper 212 is stacked with the first carbon paper 211 and connected in parallel with the first carbon paper 211, and the physical adsorbent 1 is arranged between the first carbon paper 211 and the second carbon paper 212. At this time, the first carbon paper 211 and the second carbon paper 212 are respectively located on both sides of the physical adsorbent 1, which can ensure that the physical adsorbent 1 is fully heated so that the pollutants and by-products thereon are desorbed. Preferably, both ends of the first carbon paper 211 and the second carbon paper 212 are provided with electrode sheets, and can be indirectly connected to the power supply 4 through the electrode sheets. The material of the electrode sheet is preferably but not limited to copper foil or silver foil.

[0040] The voltage and pulse width of the power supply 4 can be adjusted according to the resistance value of the carbon paper and the thickness of the physical adsorbent 1, in order to desorb the pollutants on the physical adsorbent 1 and ensure that the physical adsorbent 1 has sufficient time to cool to room temperature and regenerate the physical adsorbent 1. For example, in this embodiment, the carbon paper is selected as Toray carbon fiber 120, and its resistance is in the range of 0.1-1Ω. The shape of the carbon paper can be adjusted according to the use environment. The thickness of the physical adsorbent 1 is d1,5mm≤d1≤10mm. The voltage peak of the pulse power supply 4 is in the range of 18-22V, and the width of the pulse power supply 4 is in the range of 40-60ms. The pulse power supply 4 can apply a pulse voltage with a pulse width of tens of milliseconds to the first carbon paper 211 and the second carbon paper 212. The first carbon paper 211 and the second carbon paper 212 can obtain an instantaneous high temperature (about 350°C) and then cool to room temperature. Repeating heating and cooling 10 times according to this process can achieve the regeneration of the adsorption performance of the physical adsorbent 1. Preferably, the first carbon paper 211 and / or the second carbon paper 212 are wavy. The wavy shape can be made by folding the carbon paper with a width of 3-5 mm, which can increase the contact area between the carbon paper and the physical adsorbent 1 and increase the treatment area of ​​the carbon paper to promote the regeneration of the physical adsorbent 1.

[0041] In order to reduce impurities on the carbon paper, the carbon paper can be washed three times with acetone, methanol, and isopropanol in sequence before installation, and then dried under vacuum for later use.

[0042] In the present embodiment, the air purification device 100 further includes a housing 3. An air inlet and an air outlet are respectively arranged on two opposite side walls in the housing 3. The first carbon paper 211 and the second carbon paper 212 are arranged in the housing 3. Preferably, the first end of the first carbon paper 211 and the second carbon paper 212 is arranged toward the air inlet, and the second end is arranged toward the air outlet. This allows air to flow into the housing 3 from the air inlet, pass through the physical adsorbent 1 between the first carbon paper 211 and the second carbon paper 212, and then be discharged from the air outlet on the housing 3. The air entering the housing 3 can pass through the physical adsorbent 1 from the length direction of the physical adsorbent 1, be fully purified by the physical adsorbent 1, and avoid the carbon paper with large wind resistance, so that the gas can pass through the air purification device 100 smoothly and be absorbed. In addition, the air purification device 100 can be selected to be provided with a power supply 4 in the housing 3, or it can be selected to be connected to an external power supply 4. For example, in the present embodiment, a power supply 4 is also provided in the housing 3, which can facilitate the air purification device 100 of the present embodiment to be flexibly applied to various scenarios. The material of the housing 3 is preferably, but not limited to, ABS plastic, PA66 fiber-reinforced plastic, PPS plastic, etc. For example, in this embodiment, in order to reduce the manufacturing cost of the air purification device 100 and prevent the housing 3 from being damaged when the Joule thermal effect material is heated, the portion of the housing 3 in contact with the Joule thermal effect material is made of heat-resistant materials such as PA66 fiber-reinforced plastic, PPS plastic, etc. The main body of the housing 3 is made of low-cost ABS plastic.

[0043] Example 2

[0044] Embodiment 2 relates to an air purification device 100, which is different from Embodiment 1 in that the Joule heat effect material in Embodiment 2 is a nickel foam mesh 213. Preferably, Figure 3 As shown, the nickel foam mesh 213 is bent into a multi-layer structure. The physical adsorbent 1 is embedded between two adjacent layers of the nickel foam mesh 213 .

[0045] Since the resistance of the nickel foam mesh 213 is relatively small, it is preferably configured to be in the shape of a long strip to increase the resistance of the nickel foam mesh 213, so that the nickel foam mesh 213 can fully heat the physical adsorbent 1 after being energized. For example, in the present embodiment, the nickel foam mesh 213 is preferably a 3D porous foam nickel mesh, and the length is in the range of 230-260 mm. The width is in the range of 8-12 mm. The thickness is in the range of 1.3-1.9 mm, and the resistance of the nickel foam mesh 213 is in the range of 0.17-0.18 Ω at room temperature. Specifically, the diameter of the nickel wire of the nickel foam mesh 213 is in the range of 55-70 μm. The thickness of the physical adsorbent 1 is d1,5 mm ≤ d1 ≤ 10 mm. The voltage of the power supply 4 is in the range of 0.8-1.2 v. A 1.0 V DC voltage is applied to the nickel foam, the current is about 6 A, and the temperature rise of the nickel foam can reach 100 ° C. Continuous heating for 5 minutes can achieve the regeneration of the adsorption performance of the physical adsorbent 1.

[0046] When the nickel foam mesh 213 is bent into a multi-layer structure, the two adjacent layers of nickel foam mesh 213 can fully heat the physical adsorbent 1 in the middle to ensure that the physical adsorbent 1 is fully reduced. When the Joule heat effect material is selected as the nickel foam mesh 213, since the resistance value of the nickel foam mesh 213 is relatively stable under different voltages, it can also ensure the stability of the current in the circuit under high voltage input (see Figure 4 ), the nickel foam mesh 213 will not be burned or melted due to the excessively high current value, which helps to increase the service life of the air purification device 100.

[0047] Preferably, both ends of the nickel foam mesh 213 are provided with electrode sheets, and can be indirectly connected to the power supply 4 through the electrode sheets. The material of the electrode sheet is preferably but not limited to copper foil or silver foil. Since the wind resistance of the nickel foam mesh 213 is small, the air inlet and the air outlet of the shell 3 can be optionally arranged on any two sides of the shell 3, and the air can be smoothly purified. It should be noted that the DC power supply 4 in this embodiment is only for example and does not play a limiting role. In other embodiments not shown, the nickel foam mesh 213 can also be selected to be connected to the AC power supply 4 and the pulse power supply 4, which can also play a role in regenerating the physical adsorbent 1.

[0048] Example 3

[0049] Example 3 relates to a refrigerator, which includes the air purification device 100 in the above Example 1 or Example 2. The air purification device 100 can adsorb odorous gases such as ammonia, hydrogen sulfide, mercaptan and methylamine in the refrigerator without destroying the low-temperature environment in the refrigerator. When a user accidentally touches the air purification device 100, it is not easy to be burned by the shell 3 of the air purification device 100.

[0050] In summary, the air purification device 100 of Example 1 and the refrigerator of Example 2 of the present invention can overcome the defects of the air purification device 100 in the prior art that it is easy to affect the ambient temperature inside the household appliance and even scald the user, which helps to improve the user experience.

[0051] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. An air purification device, characterized in that: include: Physical adsorbent (1); A Joule heat effect material, which acts on the physical adsorbent (1), one end of which is suitable for being connected to the positive electrode of the power source (4), and the other end of which is suitable for being connected to the negative electrode of the power source (4), and is suitable for heating the physical adsorbent (1) to regenerate the physical adsorbent (1); The specific heat capacity of the Joule thermal effect material is P, P≤400 J / (kg·K); The Joule thermal effect material comprises: A first carbon paper (211), one end of which is suitable for being connected to the positive electrode of the power source (4), and the other end of which is suitable for being connected to the negative electrode of the power source (4); The second carbon paper (212) is stacked with the first carbon paper (211) and connected in parallel with the first carbon paper (211); the physical adsorbent (1) is arranged between the first carbon paper (211) and the second carbon paper (212).

2. The air purification device according to claim 1, characterized in that: The power supply (4) is a pulse power supply (4).

3. The air purification device according to claim 1, characterized in that: The first carbon paper (211) and / or the second carbon paper (212) are wavy.

4. The air purification device according to claim 3, characterized in that: The resistance of the first carbon paper (211) and the second carbon paper (212) is in the range of 0.1-1Ω; the voltage peak of the power supply (4) is in the range of 18-22V; and the width of the power supply (4) is in the range of 40-60ms.

5. The air purification device according to claim 4, characterized in that: It also comprises a shell (3), wherein two opposite side walls in the shell (3) are respectively provided with an air inlet and an air outlet, wherein the first carbon paper (211) and the second carbon paper (212) are arranged in the shell (3), and the first ends of the first carbon paper (211) and the second carbon paper (212) are arranged towards the air inlet, and the second ends are arranged towards the air outlet.

6. The air purification device according to claim 1 or 2, characterized in that: The thickness of the physical adsorbent (1) is d1,5 mm ≤ d1 ≤ 10 mm.

7. The air purification device according to claim 1 or 2, characterized in that: The air purification device (100) is a refrigerator deodorizer.

8. A refrigerator, characterized in that: Comprising the air purification device (100) according to any one of claims 1 to 7.

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