Cold storage type device for taking water from air

Abstract

The utility model relates to the technical field of air water taking, in particular to a cold storage type air water taking device which comprises an adsorption box, a heat exchange box, a cold storage box and a refrigerating system. A heat exchange pipeline is mounted in the heat exchange box; the refrigerating system comprises a compressor, a radiator, a throttling valve and a tubular evaporator, a refrigerating pipe is installed in the cold storage box and connected with the tubular evaporator, and a secondary refrigerant in the refrigerating pipe enters the tubular evaporator for heat exchange and cooling and then circulates back to the refrigerating pipe in the cold storage box; the cold storage box is filled with a phase change cold storage material, and the cold storage box is connected with the heat exchange pipeline and used for conducting heat exchange and cooling on airflow in the heat exchange box. According to the utility model, a traditional direct cooling mode of an adsorption type condensation module for taking water from air is changed into a cold accumulation mode, cold accumulation is carried out by using methods such as environment natural cooling and a compression type refrigeration system, an available cold source with lower cost is converted into cold energy to be stored, and the problem of high energy consumption caused by traditional condensation water collection is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to air water taking technical field especially relates to a cold accumulation type air water taking device. BACKGROUND

[0002] The working process of the adsorption type air water taking device includes adsorption-desorption-condensation, wherein the condensation process is completed by a separate condensation system, and the optional condensation system includes compression refrigeration, thermoelectric refrigeration, absorption refrigeration, and natural environment cold source refrigeration. Under the same conditions, the condensation water collection amount is positively correlated with the cold end temperature. Natural cold sources are widely available and can be obtained without additional energy consumption, but generally have small heat flux density, are greatly affected by the environment, and have poor adaptability. Artificial cold sources are reliable cold sources with controllable heat flux density, but require stable input of additional energy. Researchers in this field attempt to combine natural cold sources and artificial cold sources to obtain high-quality stable, low-consumption high-yield cold end cold sources, but this method requires the installation of a large heat exchange system, which is difficult to implement on portable air water taking devices with strict volume and weight requirements.

[0003] Chinese patent CN202311705276.5 solar-based series module type adsorption air water taking unit and use method, water vapor in the atmospheric environment is enriched by the adsorbent packed bed, solar energy is absorbed by the solar energy heat collecting unit and drives the desorption process of the adsorbent material in the adsorbent packed bed, the desorbed water vapor is condensed into liquid water after being cooled by the outer finned tube condenser, and then collected by the condensed water collector to realize air water taking. It is portable, compact and simple in structure, but the cold energy of the device is obtained by heat exchange between the fins on the outside of the condenser and air, i.e., natural cold source cooling is used, the cooling temperature is high, the cold end is greatly affected by the environment, and the water taking amount is small.

[0004] Chinese patent CN202221658810.2 solar adsorption air water taking machine based on phase change heat storage, in the daytime working mode, heat is stored in the phase change material and moisture is absorbed into the water absorption filter core, in the night working mode, the heat in the phase change material is used to heat the water absorption filter core to produce water vapor, the cold energy is generated by the semiconductor refrigerator to condense the water vapor on the inner wall of the water vapor condensing cylinder, and the condensed water is collected by the condensed water collection and processing device to the water bucket. This method operates in different modes at different times of day and night, with complementary advantages, reducing the water taking power consumption, but has problems such as long water taking time, low efficiency of semiconductor refrigeration, and small water taking amount.

[0005] The air water taking device based on semiconductor refrigeration pieces in Chinese patent CN202210653159.8 utilizes at least two semiconductor refrigeration pieces, the cold end is used for reducing or maintaining the temperature of a part of the water absorption system, the hot end of the semiconductor refrigeration piece is used for increasing or maintaining the temperature of another part of the water absorption system, and the cold end and the hot end of the semiconductor refrigeration piece can be switched, thereby realizing continuous air water taking by cycle adsorption. However, it is only applicable to theoretical research, the water taking amount is low, and it is insufficient to solve the actual water shortage problem. Utility model content

[0006] Therefore, the utility model aims at providing a cold accumulation type air water taking device to at least solve the problems of low water taking efficiency and high energy input of the existing cold accumulation type air water taking device.

[0007] The utility model solves the above technical problems through the following technical scheme:

[0008] The utility model discloses a cold accumulation type air water taking device which comprises an adsorption box, a heat exchange box, a cold accumulation box and a refrigeration system, the outlet end of the adsorption box is communicated with the inlet end of the heat exchange box, a heat exchange pipeline is installed in the heat exchange box, the refrigeration system comprises a compressor, a radiator, a throttle valve and a tubular evaporator which are connected in sequence, the refrigerant inlet end of the tubular evaporator is communicated with the outlet end of the throttle valve, and the refrigerant outlet end of the tubular evaporator is communicated with the inlet end of the compressor.

[0009] A refrigeration pipe is installed in the cold accumulation box, the refrigeration pipe contains a cold carrier, the refrigeration pipe is connected with the tubular evaporator, the cold carrier in the refrigeration pipe is recycled back to the refrigeration pipe in the cold accumulation box after heat exchange and temperature reduction in the tubular evaporator, phase change cold accumulation material is filled outside the refrigeration pipe in the cold accumulation box, the cold accumulation box is connected with the heat exchange pipeline, and the cold accumulation material in the cold accumulation box is heat exchanged and cooled in the heat exchange pipeline.

[0010] Further, a plurality of adsorption beds are installed in the adsorption box, and the adsorption beds are loaded with water absorption materials.

[0011] Further, the water absorption material is MOF material with water absorption property.

[0012] Further, a fan is installed above the adsorption bed in the adsorption box, and the fan is a stepless speed regulating fan.

[0013] Further, a water receiving tank is installed at the bottom of the heat exchange box.

[0014] Further, the heat exchange pipeline is a stainless steel pipe, and a plurality of heat exchange fins are arranged on the heat exchange pipeline.

[0015] Further, the cold accumulation box is a double-layer heat insulation vacuum box.

[0016] Further, the cold storage tank is provided with a plurality of temperature sensors.

[0017] Further, the adsorption bed is also provided with a temperature sensor.

[0018] Further, a variable frequency pump is installed on the pipeline between the cold storage tank and the inlet end of the heat exchange pipeline.

[0019] The cold storage air water taking device changes the condensation module of the adsorption type air water taking device from the traditional direct cooling mode to the cold storage mode, and can utilize solar power generation, environmental natural cooling, compression type refrigeration system and other methods to store cold, and convert the low-cost available cold source into cold storage, and the replacement of the phase change cold storage material makes the phase change temperature controllable, and solves the high energy consumption problem caused by the low condensation water temperature of the traditional condensation water taking device. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structure diagram of the cold storage air water taking device, and the arrows in it represent the airflow direction;

[0021] Figure 2 is a schematic diagram of the internal structure of the cold storage tank;

[0022] Among them, the adsorption tank 100, the air inlet hole 110, the adsorption bed 120, the installation net plate 130, the fan 140, the heat exchange tank 200, the air outlet hole 220, the heat exchange pipeline 210, the cold storage tank 300, the refrigeration pipeline 310, the phase change cold storage material 320, the cold carrier inlet end 330, the cold carrier outlet end 340, the cold storage material outlet end 350, the cold storage material inlet end 360, the refrigeration system 400, the compressor 410, the radiator 420, the throttling valve 430, the tubular evaporator 440, the water receiving tank 500, the first circulating pipe 610, the second circulating pipe 620, the variable frequency pump 700. DETAILED DESCRIPTION

[0023] The advantages and effects of the present application can be understood by those skilled in the art from the disclosure of the present application. It should be noted that the drawings provided in the following examples are only used for exemplary illustration, and the drawings represent only schematic diagrams, not physical drawings, and should not be construed as limiting the present application. In order to better illustrate the embodiments of the present application, some components in the drawings may be omitted, enlarged or reduced, and do not represent the actual size of the product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0024] The same or similar reference numerals in the drawings of the embodiments of the present application correspond to the same or similar components, and in the description of the present application, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and therefore the terms used to describe the positional relationship in the drawings are only used for exemplary illustration, and should not be construed as limiting the present application. For those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0025] As shown in Figure 1 and Figure 2 A cold storage type air water taking device, comprising an adsorption box 100, a heat exchange box 200, a cold storage box 300 and a refrigeration system 400, the outlet end of the adsorption box 100 is communicated with the inlet end of the heat exchange box 200, the bottom of the adsorption box 100 has a plurality of air inlet holes 110 for the ambient air to enter. The heat exchange box 200 is provided with a heat exchange pipeline 210, and one side wall of the heat exchange box 200 is provided with a plurality of air outlet holes 220 for the internal air to be discharged. The refrigeration system 400 adopts an existing conventional compression refrigeration system 400, and the refrigeration system 400 circulates a refrigerant. The refrigeration system 400 comprises a compressor 410, a radiator 420, a throttling valve 430 and a tubular evaporator 440 connected in sequence, the refrigerant inlet end of the tubular evaporator 440 is communicated with the outlet end of the throttling valve 430, and the refrigerant outlet end of the tubular evaporator 440 is communicated with the inlet end of the compressor 410. The refrigeration pipe 310 is installed in the cold storage box 300, the refrigeration pipe 310 has a cold carrier, the refrigeration pipe 310 is connected with the tubular evaporator 440, and the cold carrier in the refrigeration pipe 310 enters the tubular evaporator 440 to exchange heat and then circulates back to the refrigeration pipe 310 in the cold storage box 300. The phase change cold storage material 320 is filled outside the refrigeration pipe 310 in the cold storage box 300, the cold storage box 300 is connected with the heat exchange pipeline 210, and the phase change cold storage material 320 in the cold storage box 300 enters the heat exchange pipeline 210 to exchange heat with the airflow in the heat exchange box 200.

[0026] A plurality of adsorption beds 120 are installed in the interior of the adsorption box 100, and the adsorption beds 120 are loaded with water-absorbing materials. An installation grid plate 130 is installed at the bottom of each adsorption bed 120 to support the adsorption bed 120. The installation grid plate 130 is fixedly installed in the interior of the adsorption box 100, and the installation grid plate 130 is uniformly provided with a plurality of air holes to allow the air entering the interior of the adsorption box 100 to flow into the adsorption beds 120. A heating pipe is further installed between the adsorption bed 120 and the installation grid plate 130, and the heating pipe is spirally arranged at the bottom of the adsorption bed 120 to heat the adsorption bed 120, so that the water absorbed in the adsorption bed 120 is desorbed from the adsorption bed 120 in the form of water vapor. The water-absorbing material in the present application is a MOF material with water-absorbing property, such as MOF-303.

[0027] A fan 140 is installed above the adsorption beds 120 in the interior of the adsorption box 100, i.e. at the top of the interior of the adsorption box 100. The fan 140 serves as a driving force to bring the ambient air into the adsorption beds 120 from the air inlet hole 110. The fan 140 is a stepless speed-regulating fan, which can be operated at a preset rotating speed in the adsorption and desorption-condensation stages.

[0028] A heat exchange box 200 is installed in the air flow outlet direction of the adsorption box 100, and a water collecting box 500 is installed at the bottom of the heat exchange box 200. The high-temperature and high-humidity gas desorbed from the adsorption bed 120 is heat-exchanged in the interior of the heat exchange box 200, and the condensed water droplets automatically flow into the water collecting box 500 for collection. The heat exchange pipe 210 in the heat exchange box 200 is a stainless steel pipe, and the heat exchange pipe 210 is provided with a plurality of heat exchange fins to increase the heat exchange area. In the present embodiment, the heat exchange pipe 210 is spirally arranged in the interior of the heat exchange box 200.

[0029] The refrigeration system 400 is a compression refrigeration system 400, which sequentially connects a compressor 410, a radiator 420, a throttling valve and a tube evaporator 440 in a head-to-tail manner, and uses the tube evaporator 440 to realize heat exchange with the carrier refrigerant and further realize cooling of the carrier refrigerant.

[0030] Please refer to Figure 2The cold storage tank 300 is a double-layer heat-insulated vacuum tank, avoiding heat exchange between the inside and outside of the cold storage tank 300, pressure-resistant, and capable of adapting to various temperature environments. The bottom of the cold storage tank 300 is provided with an electric heating plate. The cold storage tank 300 has a cold carrier inlet end 330 and a cold carrier outlet end 340. The cold carrier outlet end 330 is connected with the inlet end of the tubular evaporator 440 through a first circulation pipe 610, and the cold carrier inlet end 330 is connected with the outlet end of the tubular evaporator 440 through a second circulation pipe 620. The first circulation pipe 610 and the second circulation pipe 620 are communicated in the tubular evaporator 440. The cold storage tank 300 further has a cold storage material outlet end 350 and a cold storage material inlet end 360, which are respectively connected with two ends of the refrigeration pipe 310. The cold storage material outlet end 350 is connected with the inlet end of the heat exchange pipe 210 through a connecting pipe, and the cold storage material inlet end 350 is connected with the outlet end of the heat exchange pipe 210 through a connecting pipe. A frequency conversion pump 700 is installed on the connecting pipe between the cold storage material outlet end 340 and the inlet end of the heat exchange pipe 210, so as to promote the circulation flow of the phase change cold storage material. A plurality of temperature sensors are distributed in the cold storage tank 300. Specifically, the temperature sensors are installed at least at the cold carrier inlet end 330 and the cold carrier outlet end 340, and at the cold storage material outlet end 350 and the cold storage material inlet end 360.

[0031] In the embodiment, a glycol solution with adjustable concentration can be used as the cold carrier, and the freezing point thereof can reach minus 30℃. The phase change cold storage material 320 in the cold storage tank 300 is in a solid state at a low temperature. As the temperature rises, the phase change cold storage material starts to absorb heat and liquefy. The liquefied phase change cold storage material flows out of the cooling medium outlet end of the cold storage tank 300, and enters the heat exchange pipe 210 in the heat exchange tank 200, so as to reduce the surface temperature of the heat exchange pipe 210 and condense the high-temperature and high-humidity gas desorbed at a high temperature. The condensed water enters the water collecting tank 500 at the bottom of the heat exchange tank 200. The phase change cold storage material after heat exchange and temperature rise flows into the cold storage tank 300 through the cold storage material inlet end 360 under the action of the frequency conversion pump 700, and is cooled again, and so on. Considering the problem of frost formation on the surface of the heat exchange pipe 210 and the condensation water collection efficiency caused by too low temperature, the phase change temperature of the phase change cold storage material in the cold storage tank 300 is controlled at 0℃, and common phase change cold storage materials such as water and other phase change cold storage materials with high heat values are used. Meanwhile, considering the relationship between the cold storage capacity and energy consumption in the cold storage tank 300, the preset temperature in the cold storage tank 300 is set to minus 20℃.

[0032] The cold energy of the coolant comes from the compression refrigeration system 400, which exchanges heat with the coolant through the tube evaporator 440. The cooled coolant enters the cold storage tank 300 through the second circulation pipe 620 and exchanges heat with the phase change cold storage material in the cold storage tank 300. The refrigeration system 400 can also be removed to further reduce the volume and weight of the entire cold storage air water extraction device and make it more portable. The cold storage air water extraction device without the refrigeration system 400 can use the pre-stored cold energy in the cold storage tank 300 as a condensation cold source for high-temperature and high-humidity gas. When the ambient temperature is lower than the preset value, such as at night in autumn and winter, the ambient low-temperature air can be directly used to cool the cold storage phase change material, which can be separated from the compression refrigeration system 400, and can also effectively cool the hot and humid air to collect water, thereby achieving energy-saving effect.

[0033] The cold storage process of the above-mentioned cold storage air water extraction device is as follows:

[0034] In places with sufficient solar energy, solar power can be used to replace traditional electricity to drive the refrigeration system 400 compression refrigeration cycle. When solar energy cannot be used, the refrigeration cycle can be performed at night or other power valley. Considering the cold storage capacity and the performance of the fluid coolant, the evaporation temperature of the refrigeration system 400 cycle is designed to be -25°C. In the working process of the refrigeration system 400, the cold energy in the tube evaporator is taken away by the ethylene glycol coolant, which has a freezing point below -30°C and will not freeze. Due to the heat exchange temperature difference, the coolant after heat exchange enters the cold storage tank 300, and the cold energy is further transferred to the cold storage material (for example, water), which undergoes phase change and gradually condenses into solid state at a low temperature of -20°C. Temperature sensors are installed in each corner of the cold storage tank 300, and when the detection temperature of all temperature sensors in the cold storage tank 300 reaches the preset value t1, the refrigeration system 400 cycle ends, and the cold energy is stored. When the ambient temperature is lower than the preset value t1, the natural cold source of the environment can be directly used for cold storage. Since the ambient temperature is uncontrollable and the cold storage tank 300 has good thermal insulation, the ambient cold air can only exchange heat through the first circulation pipe 610 and the second circulation pipe 620. At this time, the temperature of the phase change cold storage material will not be as low as that of the artificial cold source, but the long-time cooling of the whole night can also achieve certain cold storage effect.

[0035] The water adsorption process of the above-mentioned cold storage air water extraction device is as follows:

[0036] The refrigeration system 400 is turned off, the ambient air enters the adsorption tank 100 from the air inlet hole 110 at the bottom of the adsorption tank 100 under the drive of the fan 140 at the top of the adsorption tank 100, and the MOF material in the adsorption bed 120 adsorbs the moisture in the air. The dry air after adsorption flows through the air outlet hole 220 of the heat exchange tank 200 and is discharged into the atmosphere.

[0037] The desorption-condensation process of the above-mentioned cold storage air water extraction device is as follows:

[0038] After the end of adsorption, the MOF material in the adsorption bed 120 has adsorbed a considerable amount of moisture, at this time the electric heating plate installed at the bottom of the cold storage tank 300 is turned off after being slightly heated, so that a small amount of phase change cold storage material is liquefied, and the variable frequency pump 700 is turned on at the same time. The desorption mode is started. The speed of the fan 140 is adjusted to the desorption-condensation speed, the heating pipe at the bottom of the multi-layer adsorption bed 120 is started, and the MOF material is heated to the preset temperature t3 (for example, 100°C) of the adsorption bed 120. The high-temperature and high-humidity gas after the desorption of the MOF material continuously flows through the heat exchange tank 200 under the action of the fan 140, and the liquefied phase change cold storage material flows into the heat exchange tank 200 under the drive of the variable frequency pump 700. In the heat exchange tank 200, the high-temperature and high-humidity gas exchanges heat with the phase change cold storage material in the heat exchange pipeline 210, and the temperature of the liquefied phase change cold storage material is 0°C. The high-temperature and high-humidity gas continuously cools and condenses when it contacts the surface of the low-temperature heat exchange pipeline 210, and the condensed water flows down along the heat exchange tank 200 under the action of gravity and finally flows into the water collecting tank 500. The liquid phase change cold storage material that is heated by heat exchange returns to the cold storage tank 300 under the action of the variable frequency pump 700, and due to the temperature difference, more phase change cold storage material in the cold storage tank 300 is liquefied. The low-temperature liquid phase change cold storage material continuously exchanges heat in the heat exchange tank 200 and the cold storage tank 300, and the temperature of the liquid at the outlet end 350 of the cold storage tank 300 is always kept at 0°C. The temperature and humidity sensor arranged at the outlet of the heat exchange tank 200 always detects the moisture content of the outlet air, and controls the flow of the liquid phase change cold storage material in the variable frequency pump 700 according to the moisture content value, so as to control the heat exchange amount. On the one hand, it avoids the influence of high moisture content of the outlet air on the water taking amount, and on the other hand, it avoids the waste of cold energy caused by too low outlet air temperature.

[0039] The temperature sensor at the outlet end 350 of the cold storage tank 300 needs to detect the temperature of the liquid phase change cold storage material at any time. If the temperature t4 of the outlet end of the cold storage tank 300 is detected for a continuous T1 time, t4 max (for example, t4 max 5°C), it indicates that the temperature of the phase change cold storage material in the cold storage tank 300 has reached the upper limit of refrigeration, and it is impossible to continuously output cold energy. At this time, the cold storage work needs to be repeated. In special cases, the cold storage and condensation can be operated at the same time to ensure that the air water taking is not affected by the cold storage under different environments and conditions.

[0040] The above examples are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions of the present application, and all should be covered in the scope of the claims of the present application. The technical, shape, and structure parts not described in detail in the present application are well-known technologies.

Claims

1. A cold storage air-water extraction device, characterized in that, The system includes an adsorption box, a heat exchange box, a cold storage box, and a refrigeration system. The outlet end of the adsorption box is connected to the inlet end of the heat exchange box. A heat exchange pipe is installed inside the heat exchange box. The refrigeration system includes a compressor, a radiator, a throttling valve, and a tubular evaporator connected in sequence. The refrigerant inlet end of the tubular evaporator is connected to the outlet end of the throttling valve, and the refrigerant outlet end of the tubular evaporator is connected to the inlet end of the compressor. The cold storage box is equipped with refrigeration pipes containing a refrigerant. The refrigeration pipes are connected to a tubular evaporator. The refrigerant in the refrigeration pipes exchanges heat with the tubular evaporator to cool down before circulating back to the refrigeration pipes in the cold storage box. The cold storage box is filled with phase change cold storage material outside the refrigeration pipes. The cold storage box is connected to a heat exchange pipe. The phase change cold storage material inside the cold storage box enters the heat exchange pipe to exchange heat and cool down the airflow inside the heat exchange box.

2. The cold storage air-water extraction device according to claim 1, characterized in that, The adsorption box is equipped with multiple adsorption beds, and the adsorption beds are loaded with water-absorbing material.

3. The cold storage air-water extraction device according to claim 2, characterized in that, The absorbent material is a MOF material with water-absorbing properties.

4. A cold storage air-water extraction device according to claim 2, characterized in that, A fan is installed above the adsorption bed inside the adsorption box. The fan is a stepless speed-regulating fan.

5. A cold storage air-water extraction device according to claim 1, characterized in that, A water receiving tank is installed at the bottom of the heat exchange box.

6. A cold storage air-water extraction device according to claim 1, characterized in that, The heat exchange pipe is a stainless steel pipe, and the heat exchange pipe has a number of heat exchange fins.

7. A cold storage air-water extraction device according to claim 1, characterized in that, The cold storage box is a double-layered insulated vacuum box, and multiple temperature sensors are distributed inside the cold storage box.

8. A cold storage air-water extraction device according to claim 2, characterized in that, Temperature sensors are also installed on the adsorption bed.

9. A cold storage air-water extraction device according to claim 1, characterized in that, The heat exchange box has an air outlet on its side wall, and a temperature and humidity sensor is installed on the air outlet.

10. A cold-storage air-water extraction device according to any one of claims 1-9, characterized in that, A variable frequency pump is installed on the pipeline between the cold storage box and the inlet end of the heat exchange pipeline.

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