An energy-saving air conditioning refrigeration device

Abstract

This utility model provides an energy-saving air conditioning refrigeration device, including a dissolver, a crystallizer, and a heat exchanger. The dissolver and the crystallizer are fluidly connected. The dissolver is used to dissolve the refrigeration working medium in water to obtain an air temperature regulator solution. The heat exchanger is disposed inside or outside the dissolver. Indoor air is introduced into the heat exchanger, and the indoor air in the heat exchanger exchanges heat with the air temperature regulator solution in the dissolver. The crystallizer is used to evaporate and crystallize the air temperature regulator solution after heat exchange in the dissolver.

Description

Technical Field

[0001] This utility model belongs to the field of refrigeration technology, and in particular relates to an air temperature regulator and an energy-saving air conditioning refrigeration device. Background Technology

[0002] Air conditioning refrigeration technology includes various methods such as compressor refrigeration, absorption refrigeration, adsorption refrigeration, thermoacoustic refrigeration, and semiconductor refrigeration. Compressor refrigeration, the most widely used, has entered countless households, becoming a major household appliance. Each year, air conditioning accounts for 30-50% of the average household's electricity consumption, and in Shanghai, it accounts for 58% of building electricity consumption. Air conditioning power consumption poses a significant challenge to the power supply, with peak summer electricity consumption occurring during the cooling season. Shanghai's power consumption is 40 million kilowatts and continues to increase.

[0003] Reducing electricity load, developing new types of air conditioners, and ensuring cooling demand are important research topics. Currently, absorption refrigeration utilizes thermal energy for cooling, increasing the coefficient of performance (COP) from 0.2 to 0.4, 0.6, 0.8, and 1.2. The COP of a single-effect lithium bromide absorption chiller is 0.8, that of a double-effect lithium bromide absorption chiller is 1.1-1.2, and that of a triple-effect absorption chiller is even higher. Utilizing renewable energy sources such as solar energy is a major way to reduce cooling energy consumption and also a key method for the efficient utilization of industrial waste heat in summer.

[0004] Dissolution refrigeration is a new technological field in refrigeration, but existing solution refrigeration systems suffer from low efficiency. In 2011, Yang Jiahua filed Chinese patents CN102287953A and CN102287954A. These solutions, due to the presence of air compressors, suffer from high noise levels, short mechanical lifespan, and low cycle efficiency. Meanwhile, refrigerant crystal regeneration is crucial in solution refrigeration; achieving refrigerant crystal regeneration can make solution refrigeration more energy-efficient and environmentally friendly. Summary of the Invention

[0005] This utility model provides an air temperature regulator and an energy-saving air conditioning refrigeration method and device, achieving at least one of the following objectives: proposing a completely new refrigeration cycle to improve refrigeration efficiency; fully utilizing the temperature difference between the dry bulb and wet bulb of ambient air to regenerate the refrigeration working medium; and realizing a highly efficient refrigeration cycle.

[0006] To achieve the above and other related objectives, this utility model provides the following technical solution:

[0007] In a first aspect, this utility model provides an air temperature regulator, the air temperature regulator comprising a refrigeration working medium, the refrigeration working medium comprising one of sodium sulfate decahydrate, sodium carbonate decahydrate, sodium nitrate, potassium nitrate, ammonium nitrate, calcium nitrate tetrahydrate, magnesium nitrate hexahydrate, and potassium chloride.

[0008] In a second aspect, this utility model provides a method for using an air temperature regulator, comprising: dissolving the above-mentioned refrigeration working medium in water to obtain the air temperature regulator solution, wherein the mass ratio of the refrigeration working medium to water is in the range of 0.05 to 3:1.

[0009] This utility model also provides a method for preparing an air temperature regulator, comprising: mixing a refrigeration working medium with water at a mass ratio of 0.05 to 3:1 to obtain the air temperature regulator solution, wherein the refrigeration working medium is one of sodium sulfate decahydrate, sodium carbonate decahydrate, sodium nitrate, potassium nitrate, ammonium nitrate, calcium nitrate tetrahydrate, magnesium nitrate hexahydrate, and potassium chloride.

[0010] This utility model also provides an air temperature regulator solution, which is prepared by the following method: dissolving a refrigeration working medium in water to obtain the air temperature regulator solution, wherein the mass ratio of the refrigeration working medium to water is in the range of 0.05~3:1, and the refrigeration working medium includes one of sodium sulfate decahydrate, sodium carbonate decahydrate, sodium nitrate, potassium nitrate, ammonium nitrate, calcium nitrate tetrahydrate, magnesium nitrate hexahydrate, and potassium chloride.

[0011] In a third aspect, this utility model provides an application of an air temperature regulator in air temperature regulation. The air temperature regulator includes a refrigeration working medium, which includes one of sodium sulfate decahydrate, sodium carbonate decahydrate, sodium nitrate, potassium nitrate, ammonium nitrate, calcium nitrate tetrahydrate, magnesium nitrate hexahydrate, and potassium chloride. The air temperature regulator regulates the air temperature within the range of 5-30°C.

[0012] A fourth aspect of this utility model provides an energy-saving air conditioning cooling method, comprising the following steps:

[0013] S1: Air Cooling

[0014] The refrigeration working medium is dissolved in water to obtain an air temperature regulator solution;

[0015] During the dissolution process of the refrigeration working medium and for a period of time after the refrigeration working medium has completely dissolved, the temperature of the air temperature regulator solution decreases. The air temperature regulator solution exchanges heat with the indoor air, thereby lowering the temperature of the indoor air and achieving a cooling effect, resulting in cold water and / or cold air. The cold air is then discharged into the room to lower the indoor temperature and adjust the indoor temperature to a comfortable range suitable for the human body.

[0016] The mass ratio of the refrigeration working medium to water is in the range of 0.05 to 3:1, and the refrigeration working medium includes one of sodium sulfate decahydrate, sodium carbonate decahydrate, sodium nitrate, potassium nitrate, ammonium nitrate, calcium nitrate tetrahydrate, magnesium nitrate hexahydrate, and potassium chloride.

[0017] S2: Regeneration

[0018] The air temperature regulator solution after heat exchange in the air purging step S1 is used to evaporate the water in the air temperature regulator solution and precipitate the cooling working medium crystals.

[0019] S3: Recycling

[0020] The cooling working medium crystal obtained in step S2 is returned to step S1 for dissolution and cooling, and then recycled.

[0021] Furthermore, the air conditioning cooling method provided by this utility model further includes: monitoring the temperature of the air temperature regulator solution and the temperature of the indoor air; when the difference between the temperature of the indoor air and the temperature of the air temperature regulator solution is less than 1°C, the air temperature regulator solution is regenerated in step S2.

[0022] Furthermore, in the air conditioning refrigeration method provided by this utility model, in step S2, the air temperature regulator after heat exchange in step S1 is used to form a water curtain from top to bottom, and air is used to blow away at least a portion of the water in the air temperature regulator to obtain a refrigeration working medium crystal.

[0023] Furthermore, in the air conditioning cooling method provided by this utility model, in step S2, the humidity of the air is less than or equal to 88%. As long as the humidity of the air does not exceed 88%, the water in the air temperature regulator solution can be evaporated by air purging, causing the working fluid crystals to precipitate.

[0024] Furthermore, in the air conditioning refrigeration method provided by this utility model, in step S2, the regeneration process further includes heating the air temperature regulator solution after heat exchange.

[0025] Furthermore, in the air conditioning refrigeration method provided by this utility model, in step S2, when the relative humidity of the air is 50-100%, the regeneration process further includes heating the air temperature regulator after heat exchange to assist in the evaporation crystallization method for regeneration. This utility model can use a combination of air purging evaporation crystallization and heating evaporation crystallization methods to regenerate the air temperature regulator, or it can use only the air purging method for regeneration. However, when the relative humidity of the air is greater than 50%, heating-assisted crystallization is a necessary condition.

[0026] Furthermore, in the air conditioning cooling method provided by this utility model, in step S1, the temperature of the indoor air is adjusted to the range of 5-30℃.

[0027] Furthermore, in the air conditioning cooling method provided by this utility model, in step S1, the air temperature regulator exchanges heat with the indoor air to reduce the temperature of the indoor air and obtain water-cooled and / or cold air.

[0028] In a fifth aspect, this utility model provides an energy-saving air conditioning refrigeration device, comprising a dissolver, a crystallizer, and a heat exchanger, wherein the dissolver and the crystallizer are in fluid communication.

[0029] The dissolver is used to dissolve the refrigeration working medium in water to obtain an air temperature regulator solution;

[0030] The heat exchanger is located inside or outside the solvent. Indoor air is introduced into the heat exchanger, and the indoor air inside the heat exchanger exchanges heat with the air temperature regulating agent solution inside the solvent, thereby reducing the temperature of the indoor air.

[0031] The crystallizer is used to evaporate and crystallize the air temperature regulator solution after heat exchange in the dissolver to obtain refrigeration working medium crystals; the regenerated refrigeration working medium crystals are transported to the dissolver for recycling.

[0032] Furthermore, the air conditioning refrigeration device provided by this utility model further includes a first temperature sensor, which is used to measure the temperature of the air temperature regulator solution in the dissolver.

[0033] Furthermore, the air conditioning refrigeration device provided by this utility model further includes a second temperature sensor, which is used to measure the temperature of indoor air.

[0034] Furthermore, the air conditioning refrigeration device provided by this utility model also includes a control system, which receives temperature data transmitted by the first temperature sensor and the second temperature sensor, and monitors the temperature difference between the two.

[0035] Furthermore, in the air conditioning refrigeration device provided by this utility model, a water medium channel is provided on the side of the heat exchanger near the solvent, and water flows in the water medium channel. An air channel for indoor air circulation is provided on the other side of the heat exchanger.

[0036] Furthermore, in the air conditioning refrigeration device provided by this utility model, the heat exchanger is provided with a water medium channel for water circulation, and the water medium channel is provided with an air channel for indoor air circulation.

[0037] Furthermore, the air conditioning refrigeration device provided by this utility model further includes a heater, which is used to heat the air temperature regulator solution in the crystallizer to obtain the refrigeration working medium crystal by heating and evaporation crystallization.

[0038] Furthermore, in the air conditioning refrigeration device provided by this utility model, the crystallizer is provided with a wet curtain and a liquid circulation pump for conveying the air temperature regulator solution in the crystallizer to the wet curtain.

[0039] Preferably, it also includes a fan or blower for blowing air onto the wet curtain inside the crystallizer.

[0040] Furthermore, the air conditioning refrigeration device provided by this utility model further includes a water supply system for supplying water to the solvent.

[0041] Furthermore, the air conditioning refrigeration device provided by this utility model further includes a stirrer disposed in the dissolver, the stirrer being used to stir the refrigeration working medium and water in the dissolver to obtain the air temperature regulator solution.

[0042] The beneficial effects of this utility model are:

[0043] This invention uses air purging to evaporate and crystallize the regenerated working medium crystals, overcoming the problem of difficult refrigerant regeneration and realizing an air refrigeration cycle.

[0044] In this invention, the critical relative humidity of the air temperature regulator solution after heat exchange is higher than that of the air. As long as the air humidity does not exceed 88%, evaporation and crystallization can be achieved by air purging, thus reducing energy consumption.

[0045] This invention overcomes the problem of difficult refrigerant regeneration, and the regeneration energy consumption is significantly reduced compared to the energy consumption of heating, evaporation, and crystallization regeneration in traditional dissolution refrigeration methods. Specifically, this invention uses a fan to purge the refrigerant, introducing ambient air to accelerate evaporation and eliminating the heating energy consumption of traditional dissolution refrigeration.

[0046] In the refrigerant regeneration process, this invention eliminates the need for heating and evaporation methods, or uses heating and evaporation methods only as an auxiliary means, without requiring heating throughout the entire regeneration process. This saves electricity and energy, reducing energy consumption.

[0047] The air conditioning refrigeration method and device provided by this utility model can achieve refrigeration without a compressor, without vacuum requirements, without sealing requirements, and the equipment is easy to manufacture, has a long service life, and is low in cost.

[0048] When used for refrigeration, this invention does not use Freon-based refrigerants, does not damage ozone, and does not produce greenhouse gases, making it environmentally friendly and safe. It has high refrigeration efficiency, exceeding that of lithium bromide refrigeration air conditioners and traditional compressor air conditioners, with a coefficient of performance (COP) of 1.1-6.0 or even higher. It can produce chilled water and / or chilled air with a temperature range of 0 to 35°C. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the structure of an air conditioning refrigeration device according to an embodiment of the present invention. Detailed Implementation

[0050] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0051] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding and reading. They are not intended to limit the implementation of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effectiveness and purpose of this utility model, should still fall within the scope of the technical content disclosed in this utility model. Furthermore, the terms "first," "second," and "third" in this specification are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] The embodiments of this utility model will be described in detail below with reference to the examples. However, those skilled in the art will understand that the following examples are only for illustrating this utility model and should not be regarded as limiting the scope of this utility model. Unless otherwise specified in the examples, conventional conditions or conditions recommended by the manufacturer shall apply. Reagents or instruments whose manufacturers are not specified are all conventional products that can be purchased commercially.

[0053] One embodiment of this utility model provides an energy-saving air conditioning refrigeration device, referring to... Figure 1The system includes a solvent 1 and a crystallizer 2 connected in fluid communication, and a heat exchanger 3. In the solvent 1, the refrigerant working medium is dissolved in water to obtain an air temperature regulator solution. During the dissolution process of the refrigerant working medium and for a period after complete dissolution, cooling capacity is continuously output. The heat exchanger is located inside or outside the solvent, and indoor air is introduced into it. The indoor air in the heat exchanger 3 exchanges heat with the air temperature regulator solution in the solvent 1, causing the indoor air temperature to decrease, resulting in cool air. During the heat exchange process, the temperature of the air temperature regulator solution in the solvent 1 gradually increases. When the temperature difference with the indoor air is less than 1°C, the air temperature regulator solution is transferred to the crystallizer 2. In the crystallizer 2, the air temperature regulator solution is evaporated, crystallized, and regenerated to obtain refrigerant working medium crystals. The regenerated refrigerant working medium crystals are then transferred to the solvent 1 and mixed with water for dissolution, thus achieving recycling.

[0054] Reference Figure 1 The dissolver 1 is provided with an outlet 11 for discharging the air temperature regulator solution after heat exchange, and the crystallizer 2 is provided with an inlet 21 for entering the air temperature regulator solution after heat exchange. The outlet 11 and the inlet 21 are fluidly connected through a pipe. The crystallizer 2 is provided with a medium outlet 22 for discharging the regenerated refrigeration working medium crystals, and the dissolver 1 is provided with a medium inlet 12 for discharging the regenerated refrigeration working medium crystals. The medium outlet 22 and the inlet 12 are fluidly connected through a pipe.

[0055] This invention allows indoor air temperature to be adjusted to a range of 0 to 35°C. Users can set the ratio of the cooling medium to water according to their actual needs; reducing the water ratio can achieve a lower outlet air temperature.

[0056] In this embodiment, the heat exchanger 3 is placed against the outer wall of the solvent 1. The indoor air to be cooled enters the heat exchanger 3 through the air inlet 31. The temperature of the air temperature regulator solution is lower than the indoor air temperature. The indoor air and the air temperature regulator solution in the solvent 1 absorb the heat of the indoor air in the heat exchanger 3, thereby reducing the indoor air temperature in the heat exchanger 3. When the temperature drops to the required range, the cooled air is discharged into the room through the air outlet 32, which reduces the indoor temperature and provides a cool and comfortable environment.

[0057] In one embodiment of this utility model, a water medium channel is provided on the side of the heat exchanger near the solvent, and water flows in the water medium channel. An air channel for indoor air circulation is provided on the other side of the heat exchanger. This structural design allows the air temperature regulator solution in the solvent 1 to exchange heat with the water medium first, reducing the temperature of the water medium to the required range. The cooling capacity is then transferred to the indoor air through the water medium, thus making the temperature of the regulated indoor air more stable.

[0058] In one embodiment of this utility model, the heat exchanger is provided with a water medium channel for water supply, and an air channel for indoor air circulation is provided within the water medium channel. This structural design allows the cooling capacity of the air temperature regulator solution to be transferred to the indoor air through the water medium, resulting in a more stable temperature of the regulated indoor air.

[0059] In one embodiment of this utility model, the air conditioning refrigeration device further includes a first temperature sensor and a second temperature sensor. The first temperature sensor is used to measure the temperature of the air temperature regulator solution in the dissolver 1, and the second temperature sensor is used to measure the temperature of the indoor air. It also includes a control system that receives the temperature data transmitted by the first and second temperature sensors and monitors the temperature difference between them. When the temperature difference between the indoor air and the air temperature regulator solution is less than 1°C, meaning the temperature of the air temperature regulator solution is less than 1°C lower than the indoor air temperature, it indicates that the cooling effect of the air temperature regulator solution in the dissolver is weak, and it is then transported to the crystallizer for regeneration.

[0060] In one embodiment of this invention, the air conditioning refrigeration device further includes a fan 7, used to supply air to the crystallizer 2 to promote rapid evaporation and crystallization. Specifically, it can blow air onto the wet curtain 5 inside the crystallizer 2 to remove moisture from the air temperature regulator solution flowing down from the wet curtain 6, thereby achieving crystallization. The air is discharged through the air outlet above the crystallizer 2. In other embodiments, a blower can be used instead of a fan. Fans or blowers have low power and low energy consumption.

[0061] In this invention, a fan or blower is used for purging, introducing ambient air to accelerate evaporation, thus eliminating the heating energy consumption required in traditional dissolution refrigeration methods. Compared to the energy consumption of heating, evaporation, crystallization, and regeneration in traditional dissolution refrigeration methods, the energy consumption of this invention's air purging regeneration method is significantly reduced.

[0062] In one embodiment of this invention, the crystallizer 2 is equipped with a wet curtain 5 and a liquid circulation pump 6 for conveying the air temperature regulator solution at the bottom of the crystallizer 2 to the wet curtain 5. The wet curtain in the crystallizer 2 is designed to form a water curtain from top to bottom after the air temperature regulator solution undergoes heat exchange in the dissolver 1. When air blows across the water curtain, it increases the gas-liquid interface, thereby improving crystallization efficiency. The liquid circulation pump also has low power consumption and low energy consumption.

[0063] In one embodiment of this utility model, the air conditioning refrigeration device further includes a heater 4, which is used to heat, evaporate, and crystallize the air temperature regulator solution inside the crystallizer 2. It should be noted that when the relative humidity of the air entering the crystallizer 2 is below 50%, the heating power of the heater can be reduced or the heater can be turned off to meet the evaporation, crystallization, and refrigeration requirements. When the relative humidity of the air is 50-100%, the heater and the fan (air purging) work simultaneously, or the heater can work intermittently. For example, if the entire regeneration process takes 1 hour, the total heating time is controlled to 20 minutes to meet the evaporation, crystallization, and refrigeration requirements. It should be noted that in this utility model, the heating and evaporation method is only an auxiliary means; it can be used for continuous auxiliary heating or intermittent heating, meaning continuous auxiliary heating is not necessary. Even if continuous auxiliary heating is used, the energy consumption required for crystallization inside the crystallizer mainly comes from the energy consumption generated by air purging, with the energy consumption from heating and evaporation accounting for only a small portion.

[0064] The heating method of the heater in this invention includes, but is not limited to, electric heating, solar heating, and industrial waste heat heating, all of which can achieve the heating of the refrigeration solvent.

[0065] In one embodiment of the present invention, a water supply system is also included for supplying water to the solvent 1 through the water inlet 13 on the solvent 1.

[0066] In one embodiment of the present invention, a stirrer 8 is provided in the dissolver 1. The stirrer 8 is used to stir the cooling working medium and water in the dissolver 1, so that the cooling working medium and water are fully mixed, promote the dissolution of the cooling working medium, and obtain an air temperature regulator solution.

[0067] In one embodiment of this utility model, the mass ratio of the cooling working medium to water in the dissolver 1 ranges from 0.05 to 3:1, with typical but non-limiting mass ratios being 0.05:1, 0.1:1, 0.2:1, 0.21:1, 0.3:1, 0.31:1, 0.4:1, 0.45:1, 0.5:1, 0.6:1, 0.7:1, 0.8:1, and 0.9:1. The refrigeration working medium can be one of the following: 1.0:1, 1.07:1, 1.1:1, 1.2:1, 1.3:1, 1.4:1, 1.5:1, 1.6:1, 1.7:1, 1.8:1, 1.9:1, 2.0:1, 2.1:1, 2.2:1, 2.3:1, 2.4:1, 2.5:1, 2.6:1, 2.7:1, 2.8:1, 2.9:1, or 3.0:1. The refrigeration working medium includes one of the following: sodium sulfate decahydrate, sodium carbonate decahydrate, sodium nitrate, potassium nitrate, ammonium nitrate, calcium nitrate tetrahydrate, magnesium nitrate hexahydrate, or potassium chloride. The refrigeration working medium is in solid form.

[0068] In this invention, when sodium carbonate is selected as the cooling working medium, the required evaporation energy consumption is low and the fan airflow is low, resulting in better cooling effect.

[0069] In this invention, when potassium chloride is selected as the refrigeration working medium, potassium chloride evaporates easily, has low evaporation energy consumption, requires less purging air volume, and has high refrigeration efficiency. Furthermore, potassium chloride is neutral, has low corrosiveness, and is odorless, posing no health hazards to humans and harming the environment and ecosystems, thus offering better environmental friendliness.

[0070] This embodiment also provides an energy-saving air conditioning cooling method, including the following steps:

[0071] S1: Air Cooling

[0072] Inside the dissolver 1, the refrigeration working medium is dissolved in water to obtain an air temperature regulator solution. During the dissolution process of the refrigeration working medium and for a period of time after the refrigeration working medium is completely dissolved, the air temperature regulator can output cooling capacity and exchange heat with indoor air or water through the heat exchanger 3 to reduce the temperature of the indoor air. The exchange stops when the temperature difference between the air temperature regulator solution and the indoor air temperature is less than 1°C, or the temperature of the indoor air is controlled to the required temperature range. The cooled air is then discharged from the heat exchanger and enters the room to adjust the indoor temperature to a comfortable temperature range suitable for the human body.

[0073] S2: Refrigerant regeneration

[0074] The air temperature regulator solution, after heat exchange in the dissolver 1, enters the crystallizer 2 through the outlet 11 and outlet 21. Air is blown into the crystallizer 2 by the fan 7 and blown onto the air temperature regulator solution, carrying away the moisture in the solution. The cooling working medium crystals are continuously precipitated, completing the regeneration.

[0075] S3: Recycling

[0076] The cooling working medium crystals in crystallizer 2 are returned to dissolve in water through medium outlet 22 and medium outlet 12, thus recycling them.

[0077] In one embodiment of this utility model, in step S2, the air temperature regulator after heat exchange in step S1 is formed by the liquid circulation pump 6 and flows down the wet curtain 5 from top to bottom to form a water curtain. During the flow, the air provided by the fan 7 is used to blow the water curtain to remove the water in the air temperature regulator, thereby obtaining the cooling working medium crystal.

[0078] In one embodiment of the present invention, the method further includes: monitoring the temperature of the air temperature regulator solution in the dissolver and the temperature of the indoor air; when the temperature difference between the air temperature regulator solution and the indoor air temperature is less than 1°C, the air temperature regulator solution is regenerated in step S2.

[0079] In one embodiment of this utility model, in step S2, when the relative humidity of the air is 50-100%, the regeneration process also includes heating the air temperature regulator solution after heat exchange, that is, using a heating evaporation crystallization method to remove the moisture in it, to obtain crystals and achieve regeneration.

[0080] In one embodiment of this utility model, in step S1, the temperature of the indoor air is adjusted to the range of 5-30℃.

[0081] It should be noted that this invention can regenerate the air temperature regulator using both air purging evaporation crystallization and heating evaporation crystallization methods, or it can use only the air purging method for regeneration. When the relative humidity of the purging air used is greater than 50%, heating-assisted crystallization is a necessary condition.

[0082] In this invention, the crystallizer 2 undergoes regeneration in step S2. When the relative humidity of the air is less than or equal to 88%, the air purging of the air temperature regulator solution carries away the water in the solution, thereby evaporating and crystallizing the cooling working medium crystals. The lower the relative humidity of the air, the shorter the time required for purging the solution to crystal precipitation, and the shorter the overall regeneration process; conversely, the higher the relative humidity of the air, the longer the time required for purging the solution to crystal precipitation, and the longer the overall regeneration process.

[0083] In this invention, during the regeneration process in the crystallizer, the lower the humidity of the indoor air, the faster the moisture on the wet-bulb surface evaporates, the greater the drop in wet-bulb temperature, and the larger the temperature difference between the wet and dry bulbs. Conversely, the higher the air humidity, the slower the moisture on the wet-bulb surface evaporates, the less the wet-bulb temperature drops, and the smaller the temperature difference between the wet and dry bulbs. A larger temperature difference between the wet and dry bulbs and lower air humidity is more conducive to the regeneration of the refrigeration working medium crystal, ultimately resulting in a faster refrigeration cycle.

[0084] In this invention, the regeneration process of crystallizer 2 only requires a fan or blower to purge the refrigerant with low-humidity air. In embodiments where the solution needs to flow from top to bottom on the wet curtain, a liquid circulation pump is also required. In this case, only the power of the fan, blower, or liquid circulation pump is small, and the energy consumption is low, which saves electricity and energy.

[0085] In the embodiments provided by this utility model, within the dissolver, the cooling working medium and water dissolve and absorb heat under the action of a stirrer, causing the temperature of the air temperature regulator solution to drop. Once all the crystals have dissolved, the solution can continue to output cooling capacity. The indoor air to be treated is introduced into a heat exchanger, where it exchanges heat with the air temperature regulator solution in the dissolver, lowering the indoor air temperature before being discharged into the room, thus reducing the indoor temperature. After heat exchange, the air temperature regulator solution is transported from the dissolver to the crystallizer. When air enters the crystallizer via a fan, a liquid circulation pump lifts the air temperature regulator solution, or the solution and the heated air temperature regulator solution, to the upper part, conveying it to the wet curtain paper to form a downward-flowing water curtain. This water curtain exchanges matter and energy with the air, carrying away the water and causing crystals to precipitate. The crystals settle to the bottom of the crystallizer, are discharged through the medium outlet, and enter the dissolver. Inside the dissolver, water supplied by the water supply system mixes and dissolves with the crystals, thus creating a cycle.

[0086] The following is an explanation using specific examples:

[0087] Implementation Case 1: Potassium Nitrate Refrigeration

[0088] Refrigeration: Add 2.5 kg of potassium nitrate to the dissolving vessel, add 5.55 kg of water, and start refrigeration. The solution temperature drops from 20℃ to -5℃ to 5℃, which can lower the air temperature by 10-15℃. The air volume entering the heat exchanger is 45 cubic meters per hour at 35℃. The average air temperature at the heat exchanger outlet is 20℃ (between 10-30℃). The refrigeration capacity is 45*(35-20)*1.3*1.0=877.5kJ=243.7 watts.

[0089] Regeneration: When the temperature of the solution in the dissolver reaches 30°C, the solution enters the evaporator crystallizer, where it is heated to 45°C by a heater. Then, a fan is turned on to purge the solution from the crystallizer with indoor air. The relative humidity of the indoor air is 70%, and the heater power is 100 watts, with an operating rate of 20% to 100% (if regeneration requires 100 minutes, the heating time is 20-100 minutes, which can be done intermittently). The fan power is 100 watts. The regenerated potassium nitrate crystals are then returned to the dissolver for continued use.

[0090] The cooling efficiency of this embodiment is 243.7 / (100+100) = 1.218, which exceeds the cooling efficiency of a single-effect lithium bromide absorption chiller and achieves the cooling effect of a double-effect lithium bromide absorption chiller. Based on a minimum heating time of 20%, the coefficient of performance (COP) of this embodiment reaches 2.03, far exceeding the cooling efficiency of 1.2-1.6 of a lithium bromide absorption chiller.

[0091] In this embodiment, when an energy-saving fan is used, the fan power is only 50 watts, the heating power is 20 watts, and the cooling efficiency can reach 243.7 / 70=3.48, which is equivalent to the cooling efficiency of a level 2 energy efficiency air conditioner with compressor cooling (3.4) and exceeds the cooling efficiency of a level 3 energy efficiency air conditioner with compressor cooling (3.2).

[0092] Implementation Case 2: Sodium Carbonate Decahydrate Refrigeration

[0093] Refrigeration: Add 13.1 mol of sodium carbonate decahydrate to the dissolver, add 3.5 kg of water, and start refrigeration. The solution temperature drops from 20.5℃ to 8-12℃, which can lower the air temperature by 10-15℃. The air volume entering the heat exchanger is 45 cubic meters per hour at 33℃. The average air temperature at the outlet of the heat exchanger is 22.5℃ (between 15-30℃). The refrigeration capacity is 45*(33-22.5)*1.3*1.0=614.25kJ=170.6 watts.

[0094] Regeneration: When the solution in the dissolver reaches 30°C, it enters the crystallizer. The heater heats the solution to 33°C, and then the fan is turned on to blow indoor air (relative humidity 70%) into the dissolver, purging the solution. The heater has a power of 100 watts and an operating rate of 10% to 30%. The fan power is 100 watts. The cooling efficiency is 170.6 / (30+100) = 1.31. This exceeds the cooling efficiency of a single-effect lithium bromide absorption chiller and achieves the cooling effect of a double-effect lithium bromide absorption chiller. In this embodiment, calculated based on a minimum heating time of 10%, the COP reaches 1.55, far exceeding the cooling efficiency of lithium bromide.

[0095] In this embodiment, an energy-saving fan is used to blow air during regeneration, without the need for a heater. The fan power is 50 watts, and the cooling efficiency is 170.6 / 50=3.412, which is comparable to the cooling efficiency of a compressor-cooled air conditioner with a level 2 energy efficiency rating.

[0096] Implementation Case 3: Sodium Sulfate Refrigerant

[0097] Refrigeration: Add 1.72 kg of sodium sulfate decahydrate crystals to the dissolver, add 8.3 kg of water, and start refrigeration. The solution temperature drops from 24.2℃ to 15.0℃, which can lower the air temperature by 10-15℃. The air volume entering the heat exchanger is 45 cubic meters per hour at a temperature of 33℃, and the average air temperature at the outlet is 18℃ (between 15-30℃). The refrigeration capacity is 45 * (33-18) * 1.3 * 1.0 = 877.5 kJ = 243 watts.

[0098] Regeneration: When the solution temperature rises to 30°C, it enters the crystallizer. The heater heats the solution to 33°C, then the fan is turned on. The heating power is 100 watts, and the operating rate is 10% to 30%. The cooling efficiency is 243 / (30+100) = 1.86, exceeding the cooling efficiency of a single-effect lithium bromide absorption chiller and achieving the cooling effect of a double-effect lithium bromide absorption chiller. In this embodiment, calculated based on a minimum heating time of 10%, the coefficient of performance (COP) reaches 2.2, far exceeding the cooling efficiency of a lithium bromide absorption chiller.

[0099] In this embodiment, if only an energy-saving fan is used to blow air during the regeneration process without heating, the fan power is 50 watts, and the cooling efficiency is 243 / 50=4.86, which exceeds the first-level energy efficiency of the compressor.

[0100] Implementation Case 4: Potassium Chloride Refrigerant

[0101] Refrigeration: Add 1.71 kg of potassium chloride crystals to the dissolving vessel, add 5.43 kg of water, and begin refrigeration. The solution temperature drops from 24.1℃ to 9.1℃, which can lower the air temperature by 10-15℃. The air volume entering the heat exchanger is 45 cubic meters per hour, with a temperature of 33.1℃. The average air temperature at the outlet is 18.5℃ (between 15-30℃). The refrigeration capacity is 45 * (33 - 18.5) * 1.3 * 1.0 = 848.25 kJ = 235.6 watts.

[0102] Regeneration: When the solution temperature rises to 30°C, it enters the evaporator crystallizer. The heater heats the solution to 33°C, then the fan is turned on. The heating power is 100 watts, and the operating rate is 10% to 30%. The cooling efficiency is 235.6 / (30+100) = 1.81, exceeding the cooling efficiency of a single-effect lithium bromide absorption chiller and achieving the cooling effect of a double-effect lithium bromide absorption chiller. Based on a minimum heating time of 10%, the coefficient of performance (COP) reaches 2.14, far exceeding the cooling efficiency of a lithium bromide absorption chiller.

[0103] In this embodiment, if only an energy-saving fan is used to blow air during the regeneration process without heating, the fan power is 50 watts, and the cooling efficiency is 243 / (50+10)=4.05, which exceeds the first-level energy efficiency of the compressor.

[0104] Throughout this specification, references to "an example," "an embodiment," or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment. Therefore, the appearance of "an example," "an embodiment," or "an embodiment" in various places throughout this specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any manner in one or more embodiments.

[0105] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An energy-saving air conditioning refrigeration device, characterized in that, It includes a solvent, a crystallizer, and a heat exchanger, wherein the solvent and the crystallizer are in fluid communication. The dissolver is used to dissolve the refrigeration working medium in water to obtain an air temperature regulator solution; The heat exchanger is located inside or outside the solvent. Indoor air is introduced into the heat exchanger, and the indoor air inside the heat exchanger exchanges heat with the air temperature regulating agent solution inside the solvent. The crystallizer is used to evaporate and crystallize the air temperature regulator solution after heat exchange in the dissolver.

2. The energy-saving air conditioning refrigeration device according to claim 1, characterized in that, The air conditioning refrigeration device further includes a first temperature sensor for measuring the temperature of the air temperature regulator solution in the dissolver; the air conditioning refrigeration device further includes a second temperature sensor for measuring the temperature of indoor air; and a control system for receiving temperature data transmitted from the first and second temperature sensors and monitoring the temperature difference between them.

3. The energy-saving air conditioning refrigeration device according to claim 1 or 2, characterized in that, The heat exchanger has a water medium channel on one side near the solvent, through which water flows, and an air channel for indoor air circulation is provided on the other side of the heat exchanger.

4. The energy-saving air conditioning refrigeration device according to claim 1 or 2, characterized in that, The heat exchanger is provided with a water medium channel for water supply and circulation, and the water medium channel is provided with an air channel for indoor air circulation.

5. The energy-saving air conditioning refrigeration device according to claim 1, characterized in that, The air conditioning refrigeration device also includes a heater, which is used to heat the air temperature regulator solution in the crystallizer.

6. The energy-saving air conditioning refrigeration device according to claim 1, characterized in that, The crystallizer is equipped with a wet curtain and a liquid circulation pump for conveying the air temperature regulator solution in the crystallizer to the wet curtain.

7. The energy-saving air conditioning refrigeration device according to claim 6, characterized in that, It also includes a fan or blower for blowing air onto the wet curtain inside the crystallizer.

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