Household air water catching device based on MOFs

Abstract

The utility model relates to a household air water catching device based on MOFs. The household air water catching device comprises a shell, an air inlet is formed in the top of the side face of the shell, a first cavity communicated with the air inlet is formed in the top position in the shell, and an air inlet fan assembly, a primary filter screen assembly, an HEPA filter screen assembly and an activated carbon air filter assembly are arranged in the first cavity; a second chamber is arranged below the first chamber in the shell in a communicating manner, and an air water trapping assembly containing a water molecule adsorbent and an electric heating assembly are arranged in the second chamber; a third chamber is arranged below the second chamber in the shell in a communicating mode, a compression condensing unit comprising a condenser is arranged in the third chamber, a water storage tank is arranged below the condenser in a communicating mode, and an exhaust air opening communicated with the third chamber is formed in the side face of the shell; a water purification assembly and a water pump are arranged below the third cavity in the shell, and a water storage tank is arranged below the water purification assembly in a communicating manner. According to the technical scheme, the air water catching device convenient to use in families and the like is provided.

Description

Technical Field

[0001] The utility model relates to the technical field of water capture, in particular to a household air water capture device based on MOFs. Background Technique

[0002] The earth's atmosphere contains a large amount of water vapor, and there is a large amount of potential water resources in the air. If the water vapor in the air can be effectively converted into domestic water through technical means for daily household use, it will provide an important way to solve the water shortage problem. However, in some arid regions, there is a lack of effective means to capture water from the air, and some existing industrial air water capture systems are relatively large in size and are not suitable for household use in arid regions. Content of the Utility Model

[0003] The purpose of this application is to provide a household air water capture device based on MOFs, which aims to capture water vapor from the air and then convert it into potable liquid water to provide fresh water resources for daily household life.

[0004] To achieve the above purpose, this application provides a household air water capture device based on MOFs, and the device includes:

[0005] A housing, an air inlet is provided at the top of the side of the housing, a first chamber communicating with the air inlet is provided at the top inside the housing, an air inlet fan assembly with the air inlet side facing the air inlet is provided near the air inlet in the first chamber, a primary filter assembly, a HEPA filter assembly and an activated carbon air filter assembly are detachably arranged in sequence along the air outlet direction of the air inlet fan assembly, and the filter surfaces in the primary filter assembly and the HEPA filter assembly are both perpendicular to the air outlet direction;

[0006] A second chamber is communicated and arranged below the first chamber in the housing, an air water capture assembly containing a water molecule adsorbent and an electric heating assembly for heating the water molecule adsorbent in the air water capture assembly are arranged in the second chamber, and the water molecule adsorbent contains metal organic framework MOFs;

[0007] A third chamber is communicated and arranged below the second chamber in the housing, a compression condensation unit including a condenser is arranged in the third chamber, a water storage tank is communicated and arranged below the condenser, and an exhaust air outlet communicating with the third chamber is provided on the side of the housing;

[0008] A water purification assembly and a water pump connected in series with the water purification assembly and the water storage tank are arranged below the third chamber in the housing, and a water storage tank is communicated and arranged below the water purification assembly;

[0009] A power distribution assembly electrically connected to the air inlet fan, the electric heating assembly, the compression condensation unit and the water pump is also arranged in the housing.

[0010] Optionally, the primary filter assembly includes a rectangular ring-shaped first frame clamped in the first chamber, and at least one layer of primary filter is arranged inside the first frame.

[0011] Optionally, the HEPA filter assembly includes a rectangular ring-shaped second frame clamped in the first chamber, and at least one layer of HEPA filter is arranged inside the second frame.

[0012] Optionally, the device further includes a heat exchange assembly, and the heat exchange assembly is respectively in heat exchange connection with the heat release area of the compression condensing unit and the air-water trapping assembly.

[0013] Optionally, the water purification assembly includes:

[0014] PP cotton filter element;

[0015] An activated carbon filter element, which is connected in series to the water outlet end of the PP cotton filter element;

[0016] A separation membrane filter element, which adopts a reverse osmosis membrane or a nanofiltration membrane, and the separation membrane filter element is connected in series to the water outlet end of the activated carbon filter element;

[0017] An ultraviolet germicidal lamp, which is arranged at the water outlet end of the separation membrane filter element and is electrically connected to the power distribution assembly, and is used to kill microorganisms in the water flowing out from the water outlet end of the separation membrane filter element.

[0018] Optionally, the condenser includes a plurality of condenser fins.

[0019] Optionally, the device further includes a first partition for separating the first chamber and the second chamber, and a second partition for separating the second chamber and the third chamber. One end of the first partition away from the side of the housing where the air inlet is located is spaced from the housing, and one end of the second partition close to the side of the housing where the air inlet is located is spaced from the housing. The exhaust air outlet is arranged on the side of the housing opposite to the side of the housing where the air inlet is located.

[0020] Optionally, the second partition is a heat insulation board.

[0021] Optionally, the water molecule adsorbent further includes silica gel or molecular sieve.

[0022] Optionally, the air-water trapping assembly further includes a substrate, and the water molecule adsorbent is coated on the surface of the substrate.

[0023] Through the above technical solution, the intake fan sucks the air outside the housing from the air intake opening into the first chamber. Then, the air sequentially passes through the primary filter assembly, the HEPA filter assembly, and the activated carbon air filter assembly in the first chamber to filter the air. The filtered air enters the second chamber, where the water vapor in the air is trapped by the air-water trapping assembly. Then, it flows out through the exhaust opening after passing through the third chamber. Subsequently, the electric heating assembly heats the air-water trapping assembly to desorb the water vapor therein. The water vapor enters the third chamber and is condensed into liquid water under the condensation action of the condenser of the compression condensing unit and stored in the water storage tank. Then, it is pumped into the water purification assembly by a water pump, purified, and stored in the water storage tank for standby. In this way, the water vapor in the air is converted into clean domestic water, providing available water resources for household life and solving the problem of water shortage in arid areas. Moreover, each component is integrally arranged in the housing, occupying a smaller area compared to large-scale air water capture systems and being suitable for indoor spaces such as households.

[0024] Other features and advantages of the present application will be described in detail in the subsequent specific implementation section. Brief Description of the Drawings

[0025] The drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the following specific implementation, they are used to explain the present application, but do not constitute a limitation to the present application. In the drawings:

[0026] Figure 1 is a schematic diagram of a MOF-based household air water capture device shown according to an exemplary embodiment;

[0027] Figure 2 is a schematic diagram of the principle of a MOF-based household air water capture device shown according to an exemplary embodiment;

[0028] Figure 3 is a front view of a primary filter assembly shown according to an exemplary embodiment;

[0029] Figure 4 is a front view of a honeycomb substrate shown according to an exemplary embodiment;

[0030] Figure 5 is a cross-sectional side view of a plate-shaped substrate shown according to an exemplary embodiment.

[0031] Reference Signs:

[0032] 10. Housing; 20. Intake fan assembly; 21. Primary filter assembly; 211. First frame; 22. HEPA filter assembly; 23. Activated carbon air filter assembly; 24. Intake air vent; 25. First partition; 31. Air-water capture assembly; 31a. Honeycomb substrate; 31b. Gas through-hole; 311. Plate-shaped substrate; 312. Air through-hole; 32. Condenser; 33. Water storage tank; 34. Refrigeration compressor; 35. Heat exchange assembly; 36. Second partition; 37. Exhaust air vent; 40. Water purification assembly; 41. PP cotton filter element; 42. Activated carbon filter element; 43. Separation membrane filter element; 44. Ultraviolet germicidal lamp; 45. Water pump; 46. Water storage tank; 47. Third partition; 48. Fourth partition; 51. Water outlet faucet. Detailed implementation manners

[0033] The following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. It should be understood that the detailed implementation manners described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0034] Figure 1 is a schematic diagram of a household air water capture device based on MOFs shown according to an exemplary embodiment. Figure 2 is a schematic principle diagram of a household air water capture device based on MOFs shown according to an exemplary embodiment. Refer to Figure 1 and Figure 2 The household air water capture device based on MOFs includes:

[0035] A housing 10, an intake air vent 24 is provided at the top of the side surface of the housing 10, a first chamber communicating with the intake air vent 24 is provided at the top position inside the housing 10, an intake fan assembly 20 with the air inlet side facing the intake air vent 24 is provided near the intake air vent 24 in the first chamber, a primary filter assembly 21, a HEPA filter assembly 22 and an activated carbon air filter assembly 23 are detachably arranged in sequence along the air outlet direction of the intake fan assembly 20, and the surfaces of the filter screens in the primary filter assembly 21 and the HEPA filter assembly 22 are both perpendicular to the air outlet direction;

[0036] A second chamber is communicatively connected below the first chamber inside the housing 10. An air-water capture assembly 31 containing a water molecule adsorbent and an electric heating assembly for heating the water molecule adsorbent in the air-water capture assembly 31 are provided in the second chamber. The water molecule adsorbent contains metal-organic framework MOFs;

[0037] A third chamber is communicatively connected below the second chamber inside the housing 10. A compression condensation unit including a condenser 32 is provided in the third chamber. A water storage tank 33 is communicatively connected below the condenser 32. An exhaust air vent 37 communicating with the third chamber is provided on the side surface of the housing 10;

[0038] Inside the housing 10, a water purification component 40 is provided below the third chamber, and a water pump 45 connected in series with the water purification component 40 and the water storage tank 33 is provided. The water purification component 40 is communicatively connected to a water storage tank 46 below.

[0039] A power distribution component electrically connected to the intake fan, the electric heating component, the compression condensation unit, and the water pump 45 is further provided inside the housing 10.

[0040] Among them, the housing 10 can be in the shape of a cuboid or a shape similar to a cuboid. Taking the cuboid shape as an example, an air intake opening 24 can be provided at the top position of one side surface of the housing 10, such as Figure 1 the right side surface shown in the figure, for air to flow in. The air intake opening 24 can be provided with a grille or a filter screen to prevent foreign objects with larger sizes from entering the housing 10.

[0041] Refer to Figure 1 , a first chamber can be provided in the top area inside the housing 10. The first chamber is communicatively connected to the air intake opening 24, and an intake fan assembly 20, a primary filter screen assembly 21, a HEPA filter screen assembly 22, and an activated carbon air filter assembly 23 are provided in the first chamber.

[0042] Among them, the intake fan assembly 20 is provided close to the air intake opening 24, and is used to suck the ambient air outside the housing 10 into the first chamber through the air intake opening 24. The air intake side of the intake fan assembly 20 faces the air intake opening 24 directly. For example, the axis of the intake fan of the intake fan assembly 20 can be parallel to the air intake direction at the air intake opening 24, or perpendicular to the plane where the air intake opening 24 is located or the side surface of the housing 10 where the air intake opening 24 is located, so as to improve the air suction efficiency of the intake fan assembly 20. The intake fan assembly 20 can include a rectangular ring-shaped fixed frame, and a motor fixed by the fixed frame. A fan blade can be connected to the motor shaft. The fixed frame can be formed by connecting 4 square plates end to end. The two sides of the fixed frame are open, the enclosed area is rectangular, and the inside is hollow and ring-shaped. The motor shaft can be arranged parallel to the axis of the fixed frame and located on the central axis of the fixed frame.

[0043] Inside the first chamber, a primary filter screen assembly 21, a HEPA filter screen assembly 22, and an activated carbon air filter assembly 23 can be sequentially provided on the air outlet side of the intake fan assembly 20 to filter the inhaled air. The primary filter screen assembly 21, the HEPA filter screen assembly 22, and the activated carbon air filter assembly 23 are arranged in an overall detachable modular manner, which is convenient for replacement and maintenance.

[0044] Optionally, the primary filter screen assembly 21 includes a rectangular ring-shaped first frame 211 clamped inside the first chamber, and at least one layer of primary filter screen is provided inside the first frame 211.

[0045] Refer to Figure 3, the first frame 211 can be formed by connecting four square plates end to end. Both sides of the first frame 211 are open, and the enclosed area is rectangular with a hollow interior in a ring shape. At least one layer of primary filter screen can be fixed through the first frame 211, and the edge of the primary filter screen can be fixed on the first frame 211 to unfold the primary filter screen. If multiple layers of primary filter screens are fixed, the multiple layers of primary filter screens can be arranged parallel to each other. The primary filter screen can be made of wire mesh or polypropylene PP cotton, and can achieve primary filtration of air by blocking particulate pollutants with a relatively large particle size, such as those larger than 10 microns, or can also use a pre-filter screen. The primary filter screen can be installed in a detachable manner for easy cleaning or replacement. For example, it can be cleaned once every three months. For example, a fixing groove matching the first frame 211 can be set in the first chamber to facilitate the insertion of the first frame 211 to fix the primary filter screen assembly 21. The aforementioned fixing frame can refer to Figure 3 the design of the first frame 211 shown.

[0046] Optionally, the HEPA filter screen assembly 22 includes a rectangular ring-shaped second frame clamped in the first chamber, and at least one layer of HEPA filter screen is arranged in the second frame.

[0047] The second frame can also be formed by connecting four square plates end to end. Both sides of the second frame are open, and the enclosed area is rectangular with a hollow interior in a ring shape. At least one layer of HEPA filter screen can be fixed through the second frame. HEPA stands for High Efficiency Particulate Air Filter, that is, a high-efficiency particulate air filter. The edge of the HEPA filter screen can be fixed on the second frame to unfold the HEPA filter screen. If multiple layers of HEPA filter screens are fixed, the multiple layers of HEPA filter screens can be arranged parallel to each other. In a possible implementation manner, the shape of the second frame can be the same as that of Figure 3 the first frame 211 shown, and the same clamping method can be adopted to facilitate the cleaning or replacement of the HEPA filter screen assembly 22. For example, it can be cleaned once every 6 - 12 months. The HEPA filter screen can further purify and filter the air filtered by the primary filter screen assembly 21. For example, it can block particulate pollutants with a particle size greater than or equal to 0.3 microns, and an H13-class HEPA filter screen can be used to improve the filtration efficiency.

[0048] To improve the filtration efficiency of air, the surfaces of the primary filter screen of the primary filter screen assembly 21 and the HEPA filter screen in the HEPA filter screen assembly 22 can both be perpendicular to the air outlet direction of the intake fan to improve the filtration efficiency and filter particulate pollutants in the air, such as dust, hair, pollen, etc.

[0049] Optionally, the activated carbon air filtration component 23 may include an independent air-permeable chamber and activated carbon disposed within the chamber. For example, the activated carbon air filtration component 23 may include a cuboid-shaped housing with a hollow interior forming a chamber, and the activated carbon is placed within the chamber. A set of opposing faces of the cuboid-shaped housing are provided with small holes for air circulation. A card slot matching the housing of the activated carbon air filtration component 23 may be provided in the first chamber to snap the housing into the card slot to fix the activated carbon air filtration component 23. The side of the housing where the small holes are located may be parallel to the surface where the HEPA filter is located, so that after the air flows out through the HEPA filter assembly 22, it can flow through the activated carbon air filtration component 23 through the small holes. Furthermore, the activated carbon within the activated carbon air filtration component 23 can adsorb gaseous pollutants such as odor gas molecules and volatile organic compounds (VOCs) when the air flows through it.

[0050] A second chamber communicating with the first chamber is provided below the first chamber inside the outer shell 10. Refer to Figure 1 , the space where the intake fan assembly 20, the primary filter assembly 21, the HEPA filter assembly 22, and the activated carbon air filtration component 23 are located is the first chamber, and the space where the air-water trapping component 31 is located is the second chamber. An air-water trapping component 31 and an electric heating component are provided in the second chamber. The air-water trapping component 31 includes a water molecule adsorbent for adsorbing water molecules, and the water molecule adsorbent can desorb and release the adsorbed water molecules when heated. Thus, the filtered air in the first chamber can flow into the second chamber and be adsorbed by the air-water trapping component 31. The water molecule adsorbent includes metal-organic frameworks (MOFs), and may also include silica gel or molecular sieves, or may include a mixture of the three. The present application does not make specific limitations in this regard.

[0051] Optionally, the air-water trapping component 31 further includes a substrate, and the water molecule adsorbent is coated on the surface of the substrate.

[0052] Among them, the substrate may be a honeycomb substrate 31a, and a plurality of gas through-holes 31b parallel to each other for air flow are provided within the honeycomb substrate 31a. Taking the water molecule adsorbent MOFs as an example, the MOFs can be coated on the inner surface of the honeycomb substrate 31a within the gas through-holes 31b.

[0053] For example, the outer shape of the honeycomb substrate 31a may be cylindrical, cuboid-shaped, or other shapes, and the present application does not make specific limitations in this regard. Taking the cuboid-shaped honeycomb substrate 31a as an example, a plurality of gas through-holes 31b parallel to each other may be provided along its axial direction, and the gas through-holes 31b penetrate the upper and lower bottom surfaces of the honeycomb substrate 31a, so that air can pass through it. The cross-section of the gas through-holes 31b may be square, circular, hexagonal, etc., and the present application does not make specific limitations in this regard. For example, refer to Figure 4, the honeycomb substrate 31a can be in the shape of a cuboid, which is provided with a plurality of gas through-holes 31b with square cross-sections. From the perspective of the cross-section of the honeycomb substrate 31a perpendicular to the axis of the gas through-holes 31b, the gas through-holes 31b are arranged in a matrix form. The honeycomb substrate 31a can be made of a material with high temperature resistance and corrosion resistance, such as ceramics. The MOFs can be coated on the inner surface of the gas through-holes 31b. Then, when air flows through the gas through-holes 31b, it can contact the MOFs on the inner surface, so that the water molecules in the air are adsorbed. By providing multiple gas through-holes 31b, the contact area between air and MOFs can be increased, and the adsorption efficiency can be improved. In addition, the MOFs can also be coated on the upper and lower bottom surfaces of the honeycomb substrate 31a to further increase the contact area between air and MOFs.

[0054] Among them, the substrate can also be a plate-shaped substrate 311 designed with a laminated structure. The air and water capture assembly 31 can include multiple layers of plate-shaped substrates 311, which are arranged at intervals. The intervals between the multiple layers of plate-shaped substrates 311 form gas channels, and air through-holes 312 communicating with the gas channels on both sides of the plate-shaped substrate 311 are provided on each layer of the plate-shaped substrate 311. The air through-holes 312 on adjacent layers of plate-shaped substrates 311 are arranged staggeredly, so that the air flow directions in the air through-holes 312 on adjacent layers of plate-shaped substrates 311 are located on different straight lines. The MOFs are coated on the surface of the plate-shaped substrate 311.

[0055] See Figure 5 the cross-sectional view of the air and water capture assembly 31 designed with a laminated structure from the side view perspective, Figure 5 the shaded part in Figure 5 is the plate-shaped substrate 311, and the intervals between the layers of plate-shaped substrates 311 form gas channels. See the air flow direction indicated by the hollow arrow in

[0056] In a possible embodiment, the adsorption capacity of a water molecule adsorbent such as silica gel can be calculated by the following formula:

[0057]

[0058] In this formula, q is the adsorption amount, P is the water vapor partial pressure, k and n are adsorption material constants. For example, when the mass of the adsorbent is 1 kg, the partial pressure P = 0.01 kPa, k = 0.5, n = 2, then it is calculated that q = 0.158 g / g, and 1 kg of adsorbent can adsorb q ×1000 = 158 g of water vapor. The adsorption capacity can be improved by increasing the water vapor partial pressure.

[0059] The electric heating component can include an electric heating wire or an electric heating sheet, and can be arranged in the substrate. For example, it can be arranged in the gas through-hole 31b of the honeycomb substrate 31a, or can be arranged in the gas channel of the plate-shaped substrate 311, or directly arranged in the substrate. In a possible embodiment, the electric heating component can also be arranged in contact with the outside of the air water capture component 31 and heated through the housing of the air water capture component 31. For example, the air water capture component 31 uses a metal housing with good heat conduction, the substrate is made of a metal with good heat conduction and the substrate is in contact with the metal housing. The heat is conducted by contacting the heat-releasing part of the electric heating component with the metal housing and finally conducted to the substrate. If only a metal substrate is used, the electric heating component can be directly contacted with the outer surface of the metal substrate to achieve heat transfer. This application does not make specific limitations in this regard. After the water molecule adsorbent in the air water capture component 31 adsorbs water vapor to a certain extent, such as reaching saturation, the electric heating component can be used to heat the air water capture component 31 to increase its internal temperature to heat the water molecule adsorbent, and then release the water vapor adsorbed by the water molecule adsorbent, that is, water molecules, to form air rich in water vapor.

[0060] Inside the outer shell 10, a third chamber communicating with the second chamber is arranged below the second chamber, and a compression condensation unit is arranged in the third chamber. The compression condensation unit is composed of a series of components. For example, it can include a refrigeration compressor 34, a condenser 32, an evaporator, a throttling device, etc. Refer to Figure 1 , the space where the refrigeration compressor 34 and the condenser 32 are located is the third chamber. Refer to Figure 2 , the refrigerant circulates among components such as the refrigeration compressor 34 and the condenser 32 to achieve a refrigeration cycle. For simplicity of illustration, Figure 1 and Figure 2Only the refrigeration compressor 34 and the condenser 32 are shown, where the condenser 32 can achieve air refrigeration. For example, the air enriched with water vapor flowing into the second chamber can be introduced into the condenser 32 through a diversion structure such as a pipeline for refrigeration to obtain condensed liquid water. An exhaust air vent 37 can be provided on the side of the housing 10 corresponding to the third chamber, and thus the air discharged from the condenser 32 can be discharged outside the housing 10 through the exhaust air vent 37. Optionally, the household air water capture device based on MOFs may further include an exhaust fan provided at the exhaust air vent 37, and the exhaust fan is electrically connected to the power distribution component, thereby improving the efficiency of air flow discharge.

[0061] The condenser 32 condenses the water vapor in the air into liquid water by cooling the air below the dew point temperature. The calculation formula for the dew point temperature is:

[0062]

[0063] In this formula, Td is the dew point temperature, T is the air temperature, RH is the relative humidity, a and b are constants, a = 17.27, b = 237.7, .

[0064] It can be seen that the dew point temperature is determined by the air temperature and the relative humidity. For example T = 25 °C, RH = 50% case, calculate Td ≈ 13.84 °C, at this time the condenser 32 cools the air to 13.84 °C, starts to convert water vapor into liquid water, and starts to capture water molecules.

[0065] Optionally, the household air water capture device based on MOFs further includes a first partition 25 for separating the first chamber and the second chamber, and a second partition 36 for separating the second chamber and the third chamber. One end of the first partition 25 away from the side of the housing 10 where the air inlet 24 is located is spaced from the housing 10, and one end of the second partition 36 close to the side of the housing 10 where the air inlet 24 is located is spaced from the housing 10. The exhaust air vent 37 is provided on the side of the housing 10 opposite to the side of the housing 10 where the air inlet 24 is located.

[0066] Specifically, each chamber can be separated by partitions. Both the first partition 25 and the second partition 36 can be horizontally arranged. In order to form an air flow channel, one end of the first partition 25 and the second partition 36 can be spaced from the inner side of the housing 10. For example, see Figure 1 , the air inlet 24 is provided at Figure 1On the side of the housing 10 on the right side of the perspective, one end on the left side of the first partition 25 can be spaced from the left side surface of the housing 10, and one end on the right side of the second partition 36 can be spaced from the right side surface of the housing 10. The exhaust air vent 37 is provided on the left housing 10 and communicates with the third chamber. The space between the first partition 25 and the top of the housing 10 is the first chamber, the space between the first partition 25 and the second partition 36 is the second chamber, and the space between the second partition 36 and the third partition 47 is the third chamber. Inside the first chamber, the air inlet side of the intake fan assembly 20 faces the intake air vent 24 on the right side, and the air outlet side faces the side surface of the left housing 10. Inside the second chamber, the air inlet end of the air and water capture assembly 31 is arranged facing the side surface of the housing 10 opposite to the side surface of the housing 10 where the intake air vent 24 is located, for example, facing the left side as shown in Figure 1 shown, and the air outlet end of the air and water capture assembly 31 can be arranged facing the side surface of the housing 10 where the intake air vent 24 is located, for example, facing the right side where Figure 1 is located. Thus, air is sucked into the first chamber through the intake air vent 24 under the action of the intake fan assembly 20, flows through the primary filter assembly 21, the HEPA filter assembly 22, and the activated carbon air filter assembly 23 in sequence, then flows into the second chamber from the gap between the first partition 25 and the left housing 10, then flows through the air and water capture assembly 31 and flows into the third chamber from the gap between the second partition 36 and the right housing 10, and finally flows out from the exhaust air vent 37 after being cooled by the condenser 32. Among them, the second partition 36 can be a heat insulation board to reduce the heat exchange between the second chamber and the third chamber and reduce the mutual influence. Of course, in possible implementation manners, the second partition 36 can be not isolated from the housing 10, but the second chamber and the third chamber can be connected through a pipeline.

[0067] Optionally, referring to Figure 2 , the household air water capture device based on MOFs may further include a heat exchange component 35, and the heat exchange component 35 is respectively in heat exchange connection with the heat release area of the compression condensation unit and the air and water capture assembly 31.

[0068] For example, the heat exchange component 35 can be a connecting piece with good thermal conductivity, for example, it can be a metal connecting piece. For example, the heat release area of the compression condensation unit such as the heat release part of the refrigeration compressor 34 and the above-mentioned metal housing of the air and water capture assembly 31 are connected through a metal bar. Then, the waste heat of the refrigeration compressor 34 can be conducted to the air and water capture assembly 31 through the metal bar, reducing the heating power of the electric heating component and reducing the power consumption. The outside of the metal connecting piece can be wrapped with heat insulation materials such as heat insulation cotton to reduce the heat loss during the heat transfer process. In addition, in possible implementation manners, the heat exchange component 35 can also adopt a finned heat exchanger. During heating, the heat exchange component 35 can be preferentially used for heating, and when the heat provided by the heat exchange component 35 is insufficient, the electric heating component is used for auxiliary heating.

[0069] Inside the housing 10, referring to Figure 1 , a water storage tank 33 communicating with the condenser 32 can be arranged below the condenser 32, and the liquid water condensed by the condenser 32 can enter the water storage tank 33 for temporary storage. For example, a fourth chamber can be arranged below the third chamber. As Figure 1 shown, the space between the third partition 47 and the fourth partition 48 is the fourth chamber, and the water storage tank 33 can be placed in the fourth chamber. The water storage tank 33 can be communicated with the condenser 32 through a pipeline or the like. The condenser 32 can include a plurality of condensation fins, and the condensation fins can be square sheets to increase the contact area with air and improve the condensation efficiency. A water purification component 40 can also be arranged in the fourth chamber. Referring to Figure 2 , the water purification component 40 can be communicated with the water storage tank 33 through a water pump 45. In this way, the water pump 45 can pump the liquid water in the water storage tank 33 into the water purification component 40 for purification.

[0070] Optionally, referring to Figure 2 , the water purification component 40 includes:

[0071] PP cotton filter element 41;

[0072] Activated carbon filter element 42, which is connected in series to the water outlet end of the PP cotton filter element 41;

[0073] Separation membrane filter element 43, which adopts a reverse osmosis membrane or a nanofiltration membrane, and the separation membrane filter element 43 is connected in series to the water outlet end of the activated carbon filter element 42;

[0074] Ultraviolet germicidal lamp 44, which is arranged at the water outlet end of the separation membrane filter element 43 and is electrically connected to the power distribution component, and is used to kill microorganisms in the water flowing out of the water outlet end of the separation membrane filter element 43.

[0075] Among them, the PP cotton filter element 41 can adopt PP cotton with a precision of 5 microns to intercept particulate matter and suspended impurities in the condensed water. The activated carbon filter element 42 can be used to remove VOCs, organic pollutants, and odoriferous compounds in the liquid water. Specifically, granular activated carbon or sintered activated carbon can be selected.

[0076] In a possible implementation manner, a PP cotton filter element 41 with a precision of 5 microns can be used to intercept particulate matter and suspended impurities in the condensed liquid water, and the filtration efficiency is as follows:

[0077]

[0078] In this formula, η represents the filtration efficiency, C , out , , ,

[0079] , in ,

[0078] represents the initial concentration of particulate matter in the water, and C out represents the concentration of particulate matter in the filtered water.

[0079] In a possible implementation, for example, if the initial concentration of condensed liquid water particulate matter is 100 mg / L and it drops to 5 mg / L after filtration, then the filtration efficiency is η = 1 - 5 / 100 = 95%.

[0080] For the activated carbon filter element 42, its adsorption capacity formula is as follows:

[0081]

[0082] In this formula, q represents the adsorption amount per unit of activated carbon, C represents the concentration of pollutants in water, k and n are material constants of the activated carbon. In a possible implementation, taking volatile organic compounds (VOCs) as an example, if the VOC concentration in water is 10 mg / L, k = 0.6, n = 1.2, and calculating gives q ≈ 3.9 mg / g, that is, each gram of activated carbon can adsorb 3.9 mg of VOCs.

[0083] Among them, the reverse osmosis membrane (RO membrane) and the nanofiltration membrane (NF membrane) are two separation membranes with relatively high filtration precision, which can effectively intercept nanoscale impurities in water such as organic matter, pigments, and microorganisms, thus significantly improving the purity of liquid water. The RO membrane has more excellent separation performance and can remove smaller solute molecules, while the NF membrane performs better in selective filtration and is suitable for the separation requirements of specific components. Both can be used in the deep water purification process, and the appropriate membrane type can be selected according to the actual water quality requirements. The ultraviolet germicidal lamp 44 can physically kill bacteria and viruses in water by releasing ultraviolet UV-C light to destroy the DNA of microorganisms.

[0084] For the separation membrane filter element 43 using the RO membrane or the NF membrane, its desalination rate formula is as follows:

[0085]

[0086] In this formula, R is the desalination rate, C i is the inlet TDS concentration, C o is the outlet TDS concentration.

[0087] For the ultraviolet germicidal lamp 44, it can release UV-C light with a wavelength of 254 nm to destroy the DNA of microorganisms to achieve a sterilization effect, and the sterilization rate is calculated as follows:

[0088]

[0089] In this formula, ηrepresents the sterilization rate, κ represents the microbial killing coefficient, I represents the ultraviolet light intensity, t represents the ultraviolet exposure time in water. For example, κ = 0.05 cm 2 / (mW⋅s), the light intensity I = 20 mW / cm 2 and the exposure time t = 2 s, then it can be calculated that η ≈ 86.47%. Prolonging the exposure time or increasing the light intensity can further increase the sterilization rate to over 99%.

[0090] Optionally, the household air water harvesting device based on MOFs may further include:

[0091] a water mineralization component, which is communicatively arranged at the water outlet end of the water purification component 40 and is used to add minerals to the liquid water purified by the water purification component 40.

[0092] Through the water mineralization component, after the liquid water is filtered and sterilized, minerals beneficial to the human body such as calcium and magnesium can be added to it, and the taste and health value of the drinking water can be improved. For example, the water mineralization component may include natural ores, so that when the purified liquid water flows through the ores, trace minerals are dissolved.

[0093] See Figure 1 , a water storage tank 46 communicatively connected to the water purification component 40 is further arranged below the water purification component 40 in the housing 10. For example, the water purification component 40 and the water storage tank 46 can be directly communicatively connected through a pipeline, or can be indirectly communicatively connected to the water purification component 40 through the water mineralization component. The purified liquid water output by the water purification component 40 can enter the water storage tank 46 for storage. See Figure 1 , a water outlet faucet 51 can be arranged on the outer side of the housing 10, and the water outlet faucet 51 and the water storage tank 46 are connected in series through another water pump to pump out the water in the water storage tank 46 when water is needed. Of course, two water outlet faucets 51 can be arranged, and a heating device such as an instant heating component can be arranged in the communication pipeline between one of the water outlet faucets 51 and the water storage tank 46 to heat the water to respectively provide normal temperature water and hot water. The water storage tank 46 can be arranged in the fifth chamber formed by the space between the fourth partition 48 and the bottom of the housing 10. By modularly dividing the internal space of the housing 10 through different partitions, the interference between different components can be reduced, facilitating the guiding of air to flow along a preset path, and different components are arranged in different chambers, so that the whole does not need to be disassembled during maintenance, simplifying the maintenance process.

[0094] Inside the housing 10, a power distribution component for power supply is also provided, which is electrically connected to various electrical appliances of the household air water capture device based on MOFs, such as the intake fan assembly 20, the electric heating component, the compression and condensation unit, the water pump 45, the exhaust fan, and the ultraviolet germicidal lamp 44. In a possible implementation manner, the power distribution module may include a transformer, which can access household alternating current and be transformed to supply power for the household air water capture device based on MOFs. In a possible implementation manner, the power distribution component may also include a storage battery for power supply. In addition, the power distribution component may also include a microcontroller to achieve the control of various electrical appliances. Furthermore, a display screen may be provided on the outer surface of the housing 10 to display parameters such as the condensation temperature and the purification amount, so as to facilitate the user to understand the operation status of the device.

[0095] When the household air water capture device based on MOFs is working, it can first work in the adsorption mode to adsorb water vapor in the air, and then enter the desorption mode to release the adsorbed water vapor and condense it into liquid water. Specifically, in the adsorption mode, the intake fan of the intake fan assembly 20 can be controlled to work first, or the intake fan and the exhaust fan can be controlled to work simultaneously to inhale air from the environment outside the housing 10. The inhaled air passes through the primary filter assembly 21, the HEPA filter assembly 22, and the activated carbon air filter assembly 23 in sequence and then enters the air water capture assembly 31. The water vapor in the air is adsorbed by the water molecule adsorbent therein, and then the dry air continues to flow and finally is discharged from the exhaust air outlet 37. Then, it is switched to the desorption mode, and the electric heating component and the compression and condensation unit can be controlled to start working. As a result, when the air water capture assembly 31 is heated, the water vapor adsorbed by the water molecule adsorbent therein is desorbed and released to form air rich in water vapor, which then enters the condenser 32 to condense into liquid water and is temporarily stored in the water storage tank 33. Then, under the action of the water pump 45, the liquid water enters the water purification component 40 for purification, and the purified liquid water is finally stored in the water storage tank 46 for use. This process can be automatically controlled by a microcontroller. For example, the intake fan and the exhaust fan can be controlled to work in the first time period to run the adsorption mode. After the first time period ends and enters the second time period, it is switched to the desorption mode, and components such as the electric heating component and the compression and condensation unit are controlled to work, and the foregoing process is repeated after the second time period ends. In addition, at least one first switch can be connected in series in the circuit where the intake fan is located and the circuit where the exhaust fan is located, and at least one second switch can be connected in series in the circuit where the compression and condensation unit and the electric heating component are located. Thus, the adsorption mode and the desorption mode can be manually switched through the first switch and the second switch.

[0096] Through the above technical solution, the intake fan sucks the air outside the housing 10 from the air intake vent 24 into the first chamber. Then, the air sequentially passes through the primary filter assembly 21, the HEPA filter assembly 22, and the activated carbon air filter assembly 23 in the first chamber to filter the air. The filtered air enters the second chamber, where the water vapor in the air is trapped by the air-water trapping assembly 31 therein, and then flows out through the exhaust vent 37 after passing through the third chamber. Then, the electric heating assembly heats the air-water trapping assembly 31 to desorb the water vapor therein. The water vapor enters the third chamber and is condensed into liquid water under the condensation of the condenser 32 of the compression and condensation unit and stored in the water storage tank 33. Then, it is pumped into the water purification assembly 40 by the water pump 45, purified, and stored in the water storage tank 46 for standby. In this way, the water vapor in the air is converted into clean domestic water, providing available water resources for domestic life and solving the problem of water shortage in arid areas. Moreover, each component is integrally arranged in the housing 10, which has a smaller floor area compared with large-scale air water capture systems and is suitable for indoor spaces such as families.

[0097] Optionally, the household air water capture device based on MOFs may further include a temperature sensor, a humidity sensor, a TDS sensor, a flow sensor, a pressure sensor, etc. The temperature sensor and the humidity sensor may be arranged at the air intake vent 24 and inside the condenser 32 to detect the temperature and humidity, which can be used to calculate the dew point temperature and adjust the operating state of the condenser 32. The TDS sensor may be arranged at the water outlet end of the water purification assembly 40 to detect the TDS (total dissolved solids) concentration in the purified liquid water and monitor whether the water quality meets the drinking standard. The flow sensor may be arranged at the water inlet end of the water purification assembly 40 to detect the flow rate of the condensed liquid water entering the water purification assembly 40, and the pressure sensor may be arranged at the water outlet end of the water purification assembly 40 to monitor the pressure drop of the water purification assembly 40 to ensure the smoothness of the water path. In addition, a sensor for monitoring the state of the ultraviolet germicidal lamp 44 may be provided to prompt the user to replace it when the state of the ultraviolet germicidal lamp 44 is abnormal. The temperature sensor, the humidity sensor, the TDS sensor, the flow sensor, and the pressure sensor can all be electrically connected to the microcontroller to achieve data transmission and provide data for the control logic of the microcontroller. For example, the microcontroller can adjust the rotational speed of the intake fan according to the temperature and humidity data to ensure the balance of air flow rate and condensation efficiency, and can also dynamically adjust the refrigeration power of the condenser 32 according to the ambient dew point temperature. When the TDS exceeds the standard or the ultraviolet germicidal lamp 44 fails, the water outlet is suspended to prompt the user to perform maintenance.

[0098] The preferred embodiments of the present application have been described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present application, various simple modifications can be made to the technical solution of the present application, and these simple modifications all fall within the protection scope of the present application.

[0099] In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without conflict. To avoid unnecessary repetition, this application will not separately describe various possible combination methods.

[0100] In addition, any combination can be made among the various different embodiments of this application, as long as it does not violate the idea of this application, and it should also be regarded as the content recorded in this application.

Claims

1. A household air water capture device based on MOFs, characterized in that, The MOF-based household air water capture device includes: A housing, with an air inlet vent provided at the top of the side of the housing. A first chamber communicating with the air inlet vent is provided at the top inside the housing. An intake fan assembly with the air inlet side facing the air inlet vent is provided near the air inlet vent in the first chamber. A primary filter assembly, a HEPA filter assembly, and an activated carbon air filter assembly are detachably arranged in sequence along the air outlet direction of the intake fan assembly. The filter surfaces in the primary filter assembly and the HEPA filter assembly are both perpendicular to the air outlet direction. A second chamber is communicatively provided below the first chamber inside the housing. An air water capture assembly containing a water molecule adsorbent and an electric heating assembly for heating the water molecule adsorbent in the air water capture assembly are provided in the second chamber. The water molecule adsorbent contains metal-organic frameworks (MOFs). A third chamber is communicatively provided below the second chamber inside the housing. A compression condensation unit including a condenser is provided in the third chamber. A water storage tank is communicatively provided below the condenser. An exhaust vent communicating with the third chamber is provided on the side of the housing. A water purification assembly and a water pump connected in series with the water purification assembly and the water storage tank are provided below the third chamber inside the housing. A water storage tank is communicatively provided below the water purification assembly. A power distribution assembly electrically connected to the intake fan, the electric heating assembly, the compression condensation unit, and the water pump is also provided inside the housing.

2. The MOF-based household air water capture device according to claim 1, wherein The primary filter assembly includes a rectangular ring-shaped first frame clamped in the first chamber. At least one layer of primary filter is provided inside the first frame.

3. The MOF-based household air water capture device according to claim 1, characterized in that, The HEPA filter assembly includes a rectangular ring-shaped second frame clamped in the first chamber. At least one layer of HEPA filter is provided inside the second frame.

4. The MOF-based household air water capture device according to claim 1, characterized in that, The device further includes a heat exchange assembly, which establishes a heat exchange connection with the heat release area of the compression condensation unit and the air water capture assembly respectively.

5. The MOF-based household air water capture device according to claim 1, characterized in that, The water purification assembly includes: A PP cotton filter element; An activated carbon filter element, communicatively provided at the water outlet end of the PP cotton filter element; A separation membrane filter element, using a reverse osmosis membrane or a nanofiltration membrane. The separation membrane filter element is communicatively provided at the water outlet end of the activated carbon filter element; An ultraviolet germicidal lamp, provided at the water outlet end of the separation membrane filter element and electrically connected to the power distribution assembly, for killing microorganisms in the water flowing out of the water outlet end of the separation membrane filter element.

6. The MOF-based household air water capture device according to claim 1, wherein, The condenser includes a plurality of condenser fins.

7. The MOF-based household air water capture device according to claim 1, characterized in that, The device further includes a first partition for separating the first chamber and the second chamber, and a second partition for separating the second chamber and the third chamber. One end of the first partition away from the side of the housing where the air inlet vent is located is spaced from the housing. One end of the second partition close to the side of the housing where the air inlet vent is located is spaced from the housing. The exhaust vent is provided on the side of the housing opposite to the side of the housing where the air inlet vent is located.

8. The MOF-based household air water capture device according to claim 7, characterized in that, The second partition is a heat insulation board.

9. The MOF-based household air water capture device according to claim 1, characterized in that, The water molecule adsorbent further includes silica gel or molecular sieve.

10. The MOF-based household air water capture device according to claim 1, characterized in that, The air water capture assembly further includes a substrate, and the water molecule adsorbent is coated on the surface of the substrate.

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