Mobile air conditioning system for gravity assisted heat pipe waste heat recovery and condensed water direct drinking purification and control method

Abstract

The invention belongs to the technical field of intersection of mobile air conditioners and heat energy and water quality purification, and discloses a gravity assisted heat pipe waste heat recovery and condensate water direct drinking purification mobile air conditioning system and a control method. The system comprises an air conditioner refrigeration cycle unit, a condensate water collecting and pre-cooling unit, an efficient refined filtration and purification module, a cold and hot dual-temperature storage and supply unit and an intelligent control unit. An attached gravity heat pipe waste heat recoverer is adopted, an evaporation section of the recoverer is attached to a pipeline plane of an exhaust section of a compressor, waste heat is passively recovered through working medium phase change circulation, and reverse heat transfer is automatically prevented by means of the characteristics of a thermal diode; the efficient fine filtration purification module realizes deep purification and direct drinking of condensate water; a control strategy adopts an intelligent cooperation mode of waste heat priority and electric heating supplement. The three functions of refrigeration, normal-temperature direct drinking and boiled water supply are integrated in a compact space, the structure is reliable, energy is saved, efficiency is high, drinking water is safe, the problems that in the prior art, waste heat recovery is low in efficiency, reverse heat transfer is prone to occurring, and integration is poor are solved, and the system is suitable for various mobile scenes.

Description

Technical Field

[0001] This invention belongs to, but is not limited to, the interdisciplinary technical field of portable air conditioning technology, efficient heat and condensate recovery and utilization technology, and deep water purification technology. In particular, it relates to a portable air conditioning system and control method for gravity heat pipe waste heat recovery and direct drinking water purification. Background Technology

[0002] Portable air conditioners are widely used in temporary offices, rented residences, outdoor work, RV travel, and factory workshops due to their flexibility and lack of fixed installation. During cooling operation, the low-temperature surface of the evaporator continuously produces a large amount of condensate when in contact with humid and hot air. This condensate is essentially low-temperature soft water formed by the phase change of water vapor in the air, with extremely low levels of harmful minerals. Its initial water quality is close to that of distilled water. Although portable air conditioners are affected by air pollutants (such as PM2.5 and VOCs) and microbial contamination within the air conditioning system during operation, they still possess extremely high potential for resource utilization through deep purification.

[0003] However, existing portable air conditioners have significant drawbacks in their condensate treatment methods: traditional solutions either spray condensate onto the condenser fins for evaporation using a water-spraying impeller, or temporarily store it in a drip tray for manual emptying by the user. The former is prone to splashing and uneven heat dissipation in high-humidity environments due to the rapid condensate formation rate; the latter frequently results in overflowing water tanks triggering protective shutdowns, affecting continuous operation. Even though some existing technologies (such as CN121230060A and CN114001435A) have optimized condensate discharge control, they remain limited to the mindset of "eliminating condensate" and fail to explore its resource value as drinking water.

[0004] Existing technologies involving the purification and utilization of air conditioner condensate (such as CN107631365B) have several key technological shortcomings, making it difficult to achieve safe and reliable direct drinking water supply in portable air conditioners: First, the purification standards are vague, and precise purification processes are not designed for the limits of microorganisms and chemical pollutants in direct drinking water; Second, there is a lack of integrated design adapted to mobile scenarios, and issues such as the spatial layout of the purification module and the air conditioner, air duct interference, and heat dissipation coordination are not resolved, which can easily lead to air conditioner performance degradation or low water purification efficiency; Third, the control logic is not deeply integrated with drinking water safety, and a dynamic purification strategy based on real-time water quality has not been established, nor has intelligent linkage between the purification system and the air conditioner's operating conditions been achieved; Fourth, the hygiene of the stored water is insufficient, and bacteria can easily grow in the purified water during intermittent use or in high-temperature environments, posing a risk of secondary pollution.

[0005] More importantly, there are significant gaps in existing technologies for energy recovery and utilization in portable air conditioners: portable air conditioner condensers release a large amount of low-grade waste heat (surface temperature can reach 60-70℃) during operation. Existing solutions either fail to utilize this waste heat or use independent electric heaters to produce hot water, resulting in energy waste. Some solutions that attempt to divert heat exchange from the refrigerant pipeline have problems such as system complexity, interference with the main refrigeration cycle, and the risk of refrigerant leakage. Traditional coil heat exchangers are prone to "heat backflow"—when the water temperature in the tank is higher than the refrigerant temperature, heat is transferred back to the air conditioning system, leading to decreased condensing efficiency and increased energy consumption.

[0006] Gravity heat pipes, as a highly efficient heat transfer element, possess advantages such as no moving parts, high heat transfer efficiency, and simple structure. Their inherent thermal diode characteristics (effective heat transfer only in a specific temperature difference direction) provide an ideal technical path for solving the problem of reverse heat transfer in the recovery of waste heat from portable air conditioners. However, currently, there is no technology to systematically integrate gravity heat pipes with portable air conditioner condensate purification and direct drinking water preparation, failing to fully leverage their unique advantages in compact space, efficient heat transfer, and automatic reverse heat transfer prevention. This has resulted in the failure to overcome the dual technical bottlenecks of portable air conditioner condensate resource utilization and waste heat recovery.

[0007] Therefore, developing a mobile air conditioning system and control method for gravity heat pipe waste heat recovery and direct drinking water purification of condensate is of great innovative value and practical significance. This will solve key technical problems such as deep purification of condensate, efficient waste heat recovery and anti-reverse heat transfer, compact integration of multiple systems, and intelligent collaborative control, filling the gap in existing technology.

[0008] Based on the above analysis, the urgent technical problems that need to be solved in the existing technology are:

[0009] (1) How to design a gravity heat pipe structure that fits the compact space of a portable air conditioner, so as to achieve efficient and safe transfer of condenser waste heat to drinking water, while avoiding interference with the air conditioning refrigeration cycle;

[0010] (2) How to optimize the working fluid selection, size parameters and installation coupling method of gravity heat pipe to maximize its heat transfer efficiency in the scenario of low-grade waste heat recovery of mobile air conditioner, while strengthening its thermal diode characteristics to achieve automatic anti-reverse heat transfer.

[0011] (3) How to achieve the coordinated operation of multiple systems such as condensate collection, deep purification, waste heat recovery, electric heating supplementation, and dual-temperature water storage in a compact space, and solve the problems of space conflict, air duct interference and heat dissipation coordination between modules;

[0012] (4) How to establish an intelligent control strategy that adapts to the collaboration of multiple systems, realize the full-process automated management of waste heat priority utilization, precise electric heating supplementation, real-time water quality monitoring, and heat preservation and energy saving optimization, and ensure drinking water safety and system energy efficiency;

[0013] (5) How to build a sound water quality safety guarantee system, avoid secondary pollution in the process of condensate water purification, and ensure that the water output always meets the drinking water standards. Summary of the Invention

[0014] To address the problems existing in the prior art, this invention provides a mobile air conditioning system and control method for waste heat recovery and direct drinking water purification via gravity heat pipes.

[0015] This invention is implemented as follows: a mobile air conditioning system for waste heat recovery and direct drinking water purification using gravity heat pipes, characterized in that the mobile air conditioning system for waste heat recovery and condensate reuse includes an air conditioning refrigeration cycle unit, a condensate collection and pre-cooling unit, a high-efficiency fine filtration purification module, a dual-temperature storage and supply unit, and an intelligent control unit.

[0016] The cold and hot dual-temperature storage and supply unit includes a room temperature water storage area and a hot water preparation area that are isolated from each other by a heat insulation layer. The volume of the room temperature water storage area and the hot water preparation area is 1.5 to 2L.

[0017] The system also includes a gravity heat pipe waste heat recovery unit. The evaporator section of this unit is fixed to the refrigerant piping of the compressor exhaust section in the air conditioning refrigeration cycle unit using high thermal conductivity silicone grease or brazing, with a contact thermal resistance ≤0.0005m. 2 • K / W; The rectangular heat pipe and the near-semi-circular exhaust pipe are designed to fit together;

[0018] The heat pipe condensation section is completely submerged in the water in the boiling water preparation area, with an immersion depth of 60% to 70% of the water tank height, ensuring complete submersion.

[0019] The hot water preparation area is equipped with an auxiliary electric heating device and a water level sensor to prevent dry burning.

[0020] The high-efficiency fine filtration and purification module adopts a four-level architecture of "pretreatment-deep purification-ultraviolet sterilization-online monitoring" to ensure that the output water meets the direct drinking standards;

[0021] The gravity heat pipe is filled with deionized water as the working fluid, and the filling amount is 40% to 60% of the internal volume of the heat pipe. Before filling, the vacuum degree inside the heat pipe is ≤10Pa. When the water temperature in the boiling water preparation area is ≥5℃ higher than the outer surface temperature of the compressor exhaust section pipe, the heat transfer capacity decreases by more than 85%.

[0022] Furthermore, the gravity heat pipe waste heat recovery unit includes an evaporation section, an insulation section, and a condensation section. The evaporation section is fixed to the outer surface of the refrigerant pipeline in the compressor exhaust section by attaching or brazing with high thermal conductivity silicone grease. The insulation section is wrapped with an insulation sleeve. The thermal conductivity of the high thermal conductivity silicone grease is ≥3.0 W / (m·K), and the contact thermal resistance after brazing is ≤0.0005 m.2 ·K / W.

[0023] Furthermore, the gravity heat pipe waste heat recovery unit is filled with a low-boiling-point working fluid, which is deionized water, and the filling amount is 40% to 60% of the internal volume of the heat pipe. Before filling, the vacuum degree inside the heat pipe is ≤10Pa. The gravity heat pipe has the characteristics of a thermal diode. When the water temperature in the boiling water preparation area is ≥5℃ higher than the outer surface temperature of the compressor exhaust section pipe, the heat transfer capacity is reduced by more than 85%.

[0024] Furthermore, the high-efficiency fine filtration purification module sequentially includes a 5μm PP melt-blown filter element, a 1μm PP melt-blown filter element, a coconut shell sintered activated carbon filter element, a KDF55 (Cu-Zn alloy) filter media layer, a UF ultrafiltration membrane module, and a UV-C ultraviolet sterilization module (wavelength 254nm, irradiation dose 45mJ / cm²). 2 The outlet is equipped with a TDS sensor and a rapid microbial detection sensor, and the connecting pipeline has an inlet valve controlled by a water quality sensor. The irradiation dose of the UV-C ultraviolet sterilization module is ≥40mJ / cm². 2 .

[0025] Furthermore, the condensate collection and precooling unit includes a water collection tray and a precooling channel. The precooling channel is located between the condenser fins and is used to precool the condenser to improve system energy efficiency.

[0026] Furthermore, the intelligent control unit is configured to: after the user triggers the hot water demand, first monitor the water temperature T1 in the hot water preparation area and the outer surface temperature T2 of the compressor exhaust pipe; if T1 < T2 - 5℃, then rely on the gravity heat pipe waste heat recovery device for passive heating; when the water temperature rise rate is ≤ 0.8℃ / min and T1 < 100℃, start the auxiliary electric heater.

[0027] Furthermore, the threshold for the rate of water temperature rise can be dynamically adjusted according to the working status of the air conditioning compressor and the outer surface temperature of the compressor exhaust pipe. When the compressor is under high load, the threshold is lowered to 0.6℃ / min.

[0028] Furthermore, the dual-temperature storage and supply unit is made of food-grade 316 stainless steel, with an internal insulation layer of polyurethane foam (insulation coefficient ≤0.024W / (m·K)) and an outer vacuum insulation sleeve, with a temperature drop of ≤2℃ per hour during insulation.

[0029] Another objective of this invention is to provide a control method for a mobile air conditioning system that utilizes gravity heat pipe waste heat recovery and condensate water purification for direct drinking. This method includes the following steps:

[0030] S1: After the system starts, the condensate is collected and pre-cooled and stored in the water collection tank. If the water storage tank does not send a full liquid signal, the booster pump will be turned on to pump the water into the high-efficiency fine filtration purification module. After four stages of purification, the water flows into the room temperature water storage area and the hot water preparation area respectively.

[0031] S2: When the user triggers the hot water preparation command, the intelligent control unit reads the water temperature T1 in the hot water preparation area and the outer surface temperature T2 of the compressor exhaust pipe.

[0032] S3: Real-time monitoring of water temperature rise rate v. When v ≤ preset rate threshold and T1 < 100℃, start the auxiliary electric heater to heat the water to 100℃ and maintain boiling for 30 seconds.

[0033] S4: After the boiling water is prepared, it enters the heat preservation mode, which prioritizes the use of the waste heat recovered by the gravity heat pipe to maintain the temperature. When the waste heat is insufficient, the auxiliary electric heater works intermittently.

[0034] Furthermore, the intelligent control unit can learn the user's water usage habits and dynamically adjust the insulation temperature and heating timing; when the water quality at the outlet of the high-efficiency fine filtration purification module does not meet the standards, it automatically shuts off the water supply valve and starts the filter flushing program; if the quality still does not meet the standards after flushing, it issues an alarm prompt.

[0035] Based on the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solution to be protected by this invention are as follows:

[0036] Innovations in Gravity Heat Pipe Structure and Application: This invention is the first to propose a design that integrates a gravity heat pipe with a compressor exhaust pipe. It optimizes the heat pipe dimensions (7mm outer diameter, 200-280mm total length) and installation method for the compact space of portable air conditioners. The heat pipe has a rectangular evaporation section, a round top and square bottom insulation section, and a circular finned condensation section. The compressor exhaust pipe is nearly semi-circular. The two planes are bonded and fixed using high thermal conductivity coupling technology (thermal conductive silicone grease application or brazing), achieving efficient heat transfer. The working fluid inside the heat pipe is deionized water to accommodate the low-grade waste heat from air conditioners. The heat transfer efficiency is more than 300% higher than traditional heat exchangers. The structure is simple with no moving parts, reducing the failure rate by more than 90%.

[0037] Anti-reverse heat transfer technology enhances innovation: This invention enhances the thermal diode characteristics of gravity heat pipes by optimizing the working fluid charge (40%~60%), vacuum degree (≤10Pa) and structural design. When the water temperature is 5°C higher than the outer surface temperature of the compressor exhaust pipe, the heat transfer automatically decreases by more than 85%, eliminating the need for additional temperature control valves or complex control logic. It solves the industry pain point of "heat backflow" in traditional heat exchangers causing a decrease in air conditioning energy efficiency from a physical perspective, ensuring bidirectional and efficient operation of the system.

[0038] Multi-system integration and collaborative innovation: Within the space of a suitcase, this invention deeply integrates five functional modules: refrigeration, condensate collection and pre-cooling, four-stage precision purification, dual-temperature water storage, and waste heat recovery. Through a reasonable layout (pre-cooling channel and condenser fins work together for heat dissipation, and purification module and water tank are arranged side by side), it solves the problems of space conflict and air duct interference, and achieves a three-in-one output of "cool air, room temperature drinking water, and boiling water", breaking through the functional limitations of existing mobile environment solutions.

[0039] Innovation in cascaded energy utilization: This invention constructs a cascaded energy utilization model of "passive waste heat recovery + active electric heating supplementation". The waste heat recovery stage has zero energy consumption and zero control intervention, and the electric heating supplementation stage is precisely triggered, saving more than 40% energy compared to pure electric heating solutions (e.g., ambient temperature 35℃, humidity 60%). Combined with an intelligent insulation strategy that learns users' water usage habits, it further reduces insulation energy consumption by 15-20%, significantly improving energy utilization efficiency.

[0040] Innovation in Water Quality Safety Assurance System: This invention designs a four-level safety assurance system for condensate water, consisting of "pretreatment - deep purification - real-time sterilization - online monitoring," combined with dual-zone independent sealed water storage and real-time UV-C sterilization (irradiation dose ≥40mJ / cm³). 2 With its automatic filter flushing function, it effectively prevents secondary pollution; and it establishes a linkage control system between water quality, purification system, and water supply system to ensure that the output water always meets the standards for direct drinking.

[0041] (1) The expected benefits and commercial value of the technical solution of this invention after transformation are as follows:

[0042] Energy Saving and Economic Benefits: Actual test data shows that the system saves more than 40% energy compared to a pure electric heating solution in preparing boiling water (power consumption reduced from 0.1kWh to 0.06kWh), and the pre-cooling effect of condensate water improves the air conditioner's condensing efficiency by 5%, thus reducing users' electricity costs. In scenarios where portable air conditioners are widely used (such as temporary offices, outdoor spaces, and industrial plants), this technology can reduce energy waste, aligns with green and low-carbon development principles, and has a huge potential market size.

[0043] Resource utilization value: Transforming condensate water from "waste" into drinking water realizes the recycling of water resources, which is especially suitable for water-scarce areas or outdoor scenarios.

[0044] Commercial application potential: The system has a compact structure, suitable for suitcase-sized spaces, and can be expanded to rental housing, factories, emergency disaster relief and other fields. Through the integrated output of "cool air, room temperature drinking water and boiling water", it has a strong differentiated competitive advantage and is expected to increase the product premium by 10% to 20%, and drive derivative revenue from supporting services (such as filter replacement).

[0045] Social benefits: This technology solves the problem of condensate treatment in high-humidity environments, avoiding issues such as downtime and splashing associated with traditional solutions, improving equipment reliability, and reducing maintenance costs. After the overall technology transformation, it demonstrates considerable energy-saving potential and green economic value.

[0046] (2) The technical solution of this invention fills a technical gap in the industry both domestically and internationally:

[0047] This invention achieves a heat transfer efficiency improvement of over 300% through a gravity heat pipe structure (such as a design where the evaporation section is integrated with the compressor exhaust pipe), and utilizes the characteristics of thermal diodes to automatically prevent reverse heat transfer (heat transfer attenuation of 85% when the temperature difference is ≥5℃), thus solving industry pain points from a physical perspective. Simultaneously, the four-stage purification module (pretreatment - UF ultrafiltration - UV sterilization - online monitoring) ensures safe drinking water, overcoming the limitations of existing technologies such as single function and low energy efficiency.

[0048] (3) The technical solution of the present invention solves a technical problem that people have long wanted to solve but have never been able to solve successfully:

[0049] This invention successfully solves two major technical problems that have long existed in the field of portable air conditioners: first, the "heat backflow" in low-grade waste heat recovery leads to a decrease in air conditioner energy efficiency; second, the safety and integration problems of efficiently purifying condensate to drinking water standards.

[0050] The problem of heat backflow: In traditional coil heat exchangers, heat is transferred in the reverse direction when the water temperature in the tank is higher than the refrigerant temperature, resulting in decreased condensation efficiency and increased energy consumption. This invention achieves "automatic anti-reverse heat transfer" through the selection of working fluid (deionized water) and structural optimization (charge rate 40%–60%, vacuum degree ≤10Pa) for gravity heat pipes. When the water temperature is 5°C higher than the condenser temperature, heat transfer attenuation is reduced by more than 85%, eliminating the need for an additional control valve and solving this long-standing industry problem.

[0051] The challenge of direct drinking of condensate water: Existing technologies have vague purification standards and are prone to secondary contamination in mobile environments. This invention designs a four-level architecture of "pretreatment - deep purification - ultraviolet sterilization - online monitoring," combining a TDS sensor and UV-C sterilization (irradiation dose ≥40mJ / cm³). 2 This ensures that the microbial indicators of the effluent meet the standards, thus solving the technical leap from "recyclable" to "safe for direct drinking" of condensate.

[0052] System integration challenges: Existing solutions fail to address spatial layout and airflow interference. This invention achieves compact integration through rational modularization (such as the coordinated use of pre-cooling channels and condenser fins), integrating five major functions within the size of a suitcase, thus overcoming the contradiction between function and volume.

[0053] (4) The technical solution of the present invention overcomes technical bias:

[0054] This invention overcomes two long-standing technical biases in the industry: first, "condensate is merely waste and cannot be safely consumed directly"; second, "waste heat recovery from portable air conditioners requires complex active control and cannot efficiently prevent reverse heat transfer."

[0055] Condensate Water Resource Bias: Traditional thinking holds that condensate water is polluted by air pollutants and is only suitable for discharge or simple evaporation. However, actual measurement data (effected water TDS value of 25ppm, in compliance with GB5749-2022) proves that condensate water can meet direct drinking standards after deep purification, breaking the prejudice that "condensate water is useless" and elevating it to a high-value resource.

[0056] Bias in waste heat recovery: The industry generally believes that low-grade waste heat recovery requires electric heating assistance or complex control systems, which can easily interfere with the main refrigeration cycle. This invention utilizes the passive heat transfer characteristics of gravity heat pipes (heat transfer coefficient 1000–3000 W / (m²)). 2 By utilizing the K) and thermal diode effect, reverse heat transfer prevention with "zero control intervention" is achieved, overcoming the prejudice that "only active systems are reliable." Existing technologies avoid physical reverse heat transfer prevention schemes due to prejudice, while this invention verifies its feasibility through innovation in working fluid and structure.

[0057] Integration Feasibility Bias: Portable air conditioners are often considered too small to integrate multiple functions, according to traditional views. This invention, through designs such as a flattened water tank and optimized heat pipe dimensions (total length 200-280mm), demonstrates the feasibility of multi-functional synergy, overturning the perception that "compactness and rich functionality are mutually exclusive." Attached Figure Description

[0058] Figure 1 This is a structural diagram of a mobile air conditioning system for waste heat recovery and direct drinking water purification via gravity heat pipe, provided in an embodiment of the present invention.

[0059] Figure 2 This is a schematic diagram of the high-efficiency fine filtration and purification module provided in an embodiment of the present invention;

[0060] Figure 3 This is a structural diagram of the gravity heat pipe waste heat recovery device provided in an embodiment of the present invention;

[0061] Figure 4 This is a flowchart of the intelligent collaborative control process for boiling water preparation provided in an embodiment of the present invention;

[0062] Figure 5 This is a flowchart of condensate water management and purification control provided in an embodiment of the present invention;

[0063] In the diagram: 1. Compressor; 2. Heat pipe heat exchange unit; 3. Condenser; 4. Throttling valve (capillary tube); 5. Evaporator; 6. Water collection tank with 80mm pre-filter; 7. Pre-filter UV germicidal lamp; 8. Miniature water pump; 9. Multi-stage filtration unit; 10. Hot water storage tank; 11. Room temperature water storage tank; 12. Hot water faucet; 13. Room temperature water faucet; 14. Food-grade PE water pipe; 15. External tap water interface; 201. Compressor exhaust pipe; 202. Heat pipe evaporation section (square tube); 203. Heat pipe insulation section (round and square); 204. Heat pipe condensation section (round tube); 205. Condenser section fins; 901. 5μm PP cotton filter element; 902. 1μm PP cotton filter element; 903, coconut shell sintered activated carbon filter element; 904, KDF55 (Cu-Zn) filter media layer; 905, UF ultrafiltration membrane module; 906, UV ultraviolet germicidal lamp. Detailed Implementation

[0064] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0065] like Figures 1-3 As shown, the gravity heat pipe waste heat recovery and condensate reuse mobile air conditioning system of the present invention includes an air conditioning refrigeration cycle unit, a condensate collection and pre-cooling unit, a high-efficiency fine filtration and purification module 9, a cold and hot dual-temperature storage and supply unit, and an intelligent control unit. During system operation, the compressor 1 in the air conditioning refrigeration cycle unit continuously operates, and a stable high-temperature and high-pressure refrigerant flow condition is formed within its exhaust pipe 201. This exhaust section constitutes a stable and continuously obtainable high-grade heat source for the system.

[0066] The gravity heat pipe waste heat recovery unit includes an evaporation section 202, an insulation section 203, and a condensation section 204. The evaporation section 202 adopts a square tube structure and is attached and fixed to the outer wall of the compressor exhaust pipe 201 by high thermal conductivity silicone grease or brazing, forming a large-area contact between the evaporation section 202 and the exhaust pipe 201, thereby significantly reducing contact thermal resistance and achieving efficient coupling absorption of refrigeration waste heat. An insulation section 203 is installed between the evaporation section 202 and the condensation section 204. The insulation section 203 is externally covered with insulation material to block heat loss from non-working areas and ensure heat transfer along a predetermined direction.

[0067] The condensing section 204 adopts a circular tube structure with condensing fins 205 on its outer surface. The entire condensing section 204 is completely submerged in the hot water preparation zone 10 of the dual-temperature storage and supply unit, with its submersion depth accounting for 60% to 70% of the water tank height. When the water temperature in the hot water preparation zone 10 is lower than the temperature of the compressor exhaust pipe 201, the deionized water working fluid inside the heat pipe undergoes an evaporation-condensation phase change cycle. The residual heat absorbed by the evaporation section 202 is transferred to the condensing section 204 through the insulation section 203 and released in the hot water preparation zone 10, thus achieving passive heating of the water.

[0068] As the water temperature in the boiling water preparation zone 10 gradually increases, when the water temperature exceeds the set threshold of the temperature of the compressor exhaust pipe 201, the phase change driving force inside the gravity heat pipe decreases significantly, and the heat transfer capacity decreases by more than 85%. The gravity heat pipe automatically exhibits the characteristics of a thermal diode, which inhibits the reverse heat transfer from the structural mechanism and avoids adverse effects on the refrigeration cycle. This process does not require additional valves or active control components.

[0069] Meanwhile, the condensate formed on the surface of the evaporator 5 during air conditioner operation is guided to the water collection tank 6 with an 80mm pre-filter. After being treated by the pre-UV germicidal lamp 7, it is transported by the micro water pump 8 to the high-efficiency fine filtration purification module 9. The high-efficiency fine filtration purification module 9 includes, in sequence, a 5μm PP cotton filter element 901, a 1μm PP cotton filter element 902, a coconut shell sintered activated carbon filter element 903, a KDF55 filter media layer 904, a UF ultrafiltration membrane module 905, and a UV ultraviolet germicidal lamp 906, forming a continuous purification path from coarse to fine, from physical filtration to membrane separation and then to ultraviolet sterilization.

[0070] The purified water enters the dual-temperature storage and supply unit through food-grade PE water pipes 14. Depending on the user's water demand, it is stored in either the ambient temperature water storage tank 11 or the hot water preparation area 10. These two areas are isolated from each other by an insulation structure to prevent heat crosstalk. When the intelligent control unit detects that the water temperature rise rate in the hot water preparation area 10 is insufficient and has not reached the set temperature, it activates the auxiliary electric heating device to achieve coordinated heating through waste heat recovery and electric heating, ensuring safety.

[0071] Therefore, the present invention forms an inseparable whole system at the structural and operational mechanism level through the coordinated cooperation between the compressor 1, the gravity heat pipe evaporation section 202, the insulation section 203, the condensation section 204, the condensate purification module 9, and the cold and hot dual-temperature storage and supply unit, which is significantly different from the simple combination of refrigeration, water purification and heating functions in the prior art.

[0072] The mobile air conditioning system for waste heat recovery and direct drinking water purification via gravity heat pipe provided in this embodiment of the invention includes an air conditioning refrigeration cycle unit, a condensate collection and pre-cooling unit, a high-efficiency fine filtration purification module, a dual-temperature storage and supply unit integrating gravity heat pipe, and an intelligent control unit. The units work together to achieve three major functions: refrigeration, direct drinking at room temperature, and hot water preparation.

[0073] 1. Air conditioning refrigeration cycle unit

[0074] The air conditioning refrigeration cycle unit includes a compressor 1, a condenser 3, a throttling device 4, an evaporator 5, and a supply / exhaust fan, providing refrigeration for the system while generating waste heat and condensate to be recovered. The condenser employs a high-efficiency finned tube structure with open windows. The refrigerant piping in the compressor exhaust section serves as the coupling carrier for the gravity heat pipe evaporation section, and its surface is polished to remove the oxide layer, achieving a roughness Ra≤0.8μm to improve thermal conductivity.

[0075] 2. Condensate collection and precooling unit

[0076] The condenser is located below the evaporator, with interconnected fins. Low-temperature condensate flows through the channels between the fins onto the condenser fin surface, enhancing heat exchange and improving the energy efficiency of the air conditioning system. A 1.8L water collection tank 6 is located at the bottom of the condenser. An 80-mesh stainless steel pre-filter is installed at the inlet of the tank to effectively intercept large particles of dust, hair, and other impurities from the air. An internal pre-UV germicidal lamp 7 (wavelength 253.7nm, power 3W) provides preliminary sterilization of the condensate, reducing the risk of contamination to subsequent pipes and pumps. A miniature booster pump 8 (rated flow rate 0.5L / min, head 3m) is installed at the bottom of the tank to transport the pre-treated condensate to the multi-stage purification module. The water collection tank is connected to subsequent components via leak-proof food-grade PE water pipes to ensure leak-free water delivery.

[0077] 3. High-efficiency fine filtration purification module

[0078] It adopts a four-stage purification architecture of "pretreatment - deep purification - real-time sterilization - online monitoring," and designs a precise purification process tailored to the characteristics of condensate water quality to ensure that the effluent meets the "Standards for Drinking Water Quality" (GB 5749-2022). Figure 2 As shown, it adopts a modular and compact design, with external dimensions of 100mm in diameter and 260mm in height. It is integrated inside the air conditioner housing and connected to the output of the water collection unit via an electric three-way valve. It includes a pretreatment unit and a UF ultrafiltration membrane assembly, as detailed below:

[0079] (1) Pretreatment unit: Consists of a dual-stage PP cotton filter element and a composite filter media layer. The dual-stage PP cotton filter elements are 5μm PP cotton filter element 901 and 1μm PP cotton filter element 902, which are used to remove fine suspended solids, colloids, rust and other mechanical impurities from the condensate in stages. The composite filter media layer includes a coconut shell sintered activated carbon filter element 903 and a KDF55 (Cu-Zn alloy) filter media layer 904. The specific surface area of ​​the coconut shell sintered activated carbon filter element is ≥1000m². 2 / g, which can deeply adsorb pollutants such as residual chlorine, odor, and organic matter in water, improving the taste of water. The KDF55 filter media layer can effectively remove heavy metals (lead, mercury, cadmium, etc.), residual chlorine, and some organic matter in water through electrochemical oxidation-reduction reaction.

[0080] (2) UF ultrafiltration membrane module 905: As the core sterilization filtration unit, the membrane pore size is 0.001~0.01μm. It adopts an external pressure filtration method, which can effectively intercept microbial pollutants such as bacteria, viruses, mold, and colloids in the water, with an interception efficiency of ≥99.9%. The module has no wastewater discharge throughout the process, and the water resource utilization rate reaches 100%. The membrane module can also extend its service life through backwashing.

[0081] 4. Integrated gravity heat pipe dual-temperature storage and supply unit:

[0082] (1) Dual-zone insulated water tank: Made of food-grade 316 stainless steel, the interior is divided into a normal temperature water storage zone 11 and a hot water preparation / insulation zone 10 by a polyurethane foam insulation layer (insulation coefficient ≤0.024W / (m·K)). Each zone is independently sealed and equipped with silicone sealing gaskets to avoid cross-contamination. The normal temperature water storage zone has a volume of 1.5~2L, and the hot water preparation / insulation zone has a volume of 1.2~2L. The outer layer of the water tank is wrapped with a vacuum insulation jacket to further reduce heat loss, and the insulation performance reaches a temperature drop of ≤2℃ per hour.

[0083] The water storage unit is a sealed, food-grade PET material structure with an effective volume of 4L, allowing users to easily observe the water level. The water storage unit is connected to the output of the multi-stage purification module via a food-grade PE water pipe 14. The outlet is equipped with a high-precision TDS (Total Dissolved Solids) sensor with a measurement range of 0–1000 mg / L and an accuracy of ±1%; a capacitive level sensor with a measurement range of 0–100% and an accuracy of ±2%; and a rear-mounted UV germicidal lamp with a wavelength of 253.7nm, a power of 3W, and a sterilization rate of no less than 99.9%, effectively killing bacteria and viruses in the purified water in real time, preventing secondary pollution and ensuring the biological safety of the output water. A food-grade stainless steel faucet is located on the outside of the water storage unit for users to directly access the purified water. A drain outlet is located at the bottom of the water storage unit for drainage during periodic cleaning.

[0084] External water supply unit: In order to improve the utilization rate of the water purification equipment, the water supply valve 15 can be connected during the season when the air conditioner is not working, and it can be used as a water dispenser on its own.

[0085] (2) Gravity heat pipe waste heat recovery unit:

[0086] Structural design: such as Figure 3 As shown, multiple parallel sealed gravity heat pipes are used. The compressor exhaust pipe 201 is nearly semi-circular, and the two planes are bonded and fixed by thermally conductive silicone grease or brazing high thermal conductivity coupling technology to achieve efficient heat transfer. The evaporation section 202 of a single heat pipe is rectangular with a diameter of 7mm x 4mm, and the condensation section 204 is circular with an outer diameter of 7mm. The total length is 200-260mm, and the length is distributed as follows: evaporation section 60-80mm, adiabatic section 60-80mm, and condensation section 80-100mm. The condensation section is equipped with stainless steel fins 205 to increase the contact area with the water. The immersion depth is about 80mm to ensure that it is completely submerged in the water at the bottom of the boiling water preparation area and avoid local overheating.

[0087] Working fluid selection: Based on the exhaust temperature of the air conditioning compressor (60~70℃), deionized water is selected as the working fluid. The working temperature of this medium is usually between 20~250℃. The working fluid charge is 40%~60% of the internal volume of the heat pipe. Before charging, the inside of the heat pipe needs to be vacuumed with a vacuum degree ≤10Pa to ensure efficient phase change cycle.

[0088] Coupling installation method: The evaporator section is tightly attached to the condenser outlet section's 7mm outer diameter copper refrigerant pipe (nearly semi-circular) using high thermal conductivity silicone grease with a thermal conductivity ≥3.0W / (m·K), and secured with stainless steel clamps (pre-tightening force 5-8N) to ensure contact thermal resistance ≤0.001m. 2 • K / W; or fixation by brazing, with the brazing temperature controlled at 450~500℃, to further reduce contact thermal resistance (≤0.0005m). 2 (K / W). The insulation section is wrapped with a ceramic fiber insulation jacket with a thickness of 5-8mm to prevent heat loss.

[0089] Key features: Passive heat transfer is achieved through a phase change cycle of the internal working fluid, namely "evaporation-rise-condensation-reflux," with a heat transfer coefficient reaching 1000–3000 W / (m³). 2 It has a thermal conductivity of ·K), which is dozens of times that of traditional metals; it has a significant thermal diode effect. When the water temperature in the boiling water preparation area is higher than the outer surface temperature of the compressor exhaust pipe (difference ≥5℃), the working fluid phase change cycle power disappears, the heat transfer capacity automatically decreases by more than 85%, until it stops completely, thus avoiding heat backflow from a physical level.

[0090] (3) Auxiliary electric heating device: It is set at the top of the hot water preparation area, and adopts an immersion stainless steel heating tube (material 316L), with a power of 600~1000W. It has a dry-burn protection function and is equipped with a water level sensor linkage control. It automatically cuts off the power when the water level is lower than the set value.

[0091] 5. Intelligent control unit

[0092] The system integrates a microcontroller, temperature sensor, water level sensor, water quality sensor, and relay module. Data exchange between units is achieved via a CAN bus, and a dedicated control algorithm enables collaborative control of multiple systems. The integrated microcontroller is an STM32F103 MCU; the temperature sensors have an accuracy of ±0.5℃ and are located in the condenser outlet pipe, the ambient temperature water storage area, and the boiling water preparation area; the water level sensor is capacitive with a measurement accuracy of ±2mm.

[0093] The overall workflow of the system is as follows:

[0094] After the air conditioner starts cooling, the condensate produced by the evaporator flows into the water collection tank through the condenser fin channels, completing the initial utilization of the condensate's cooling capacity. When the water level in the collection tank reaches a certain value, the booster pump is activated to introduce water into the high-efficiency fine filtration purification module. After multi-stage purification and sterilization, part of the purified water that meets the direct drinking standards flows into the room temperature water storage area for immediate drinking, while the other part is added to the boiling water preparation area according to the water level there. At the same time, the gravity heat pipe waste heat recovery unit passively recovers the waste heat from the condenser to provide basic heating for the water in the boiling water preparation area. When the waste heat is insufficient, the intelligent control unit activates the auxiliary electric heater to supplement the heat, ultimately achieving the simultaneous output of cooling, room temperature direct drinking, and boiling water supply.

[0095] The core working mechanism of the gravity heat pipe waste heat recovery is as follows:

[0096] (1) Passive heat transfer stage: When the air conditioner is first turned on, a certain amount of room temperature drinking water needs to be added to the hot water unit of the water storage tank to facilitate the absorption of heat from the heat pipe. When the air conditioner compressor starts, when the outer surface temperature of the compressor exhaust pipe rises to above 45°C, the gravity heat pipe evaporation section absorbs heat, and the working fluid inside the pipe evaporates rapidly into a gaseous state, rising to the condensation section using the pressure difference; the gaseous working fluid exchanges heat with the low-temperature water in the hot water preparation area, releasing latent heat and condensing into a liquid state, flowing back to the evaporation section along the inner wall of the heat pipe (the inner wall has a grooved structure to promote reflux) under the action of gravity, completing one heat transfer cycle. This process does not require external power or control intervention, is completely passive, has high heat transfer efficiency and zero energy consumption.

[0097] (2) Automatic anti-reverse heat transfer mechanism: When the water temperature in the hot water preparation area continues to rise until it is higher than the outer surface temperature of the compressor exhaust pipe, the condensing power of the working fluid in the condensing section is insufficient, the gaseous working fluid cannot be effectively returned, the phase change cycle tends to stagnate, and the heat transfer capacity of the heat pipe is drastically reduced (attenuation rate ≥85%), which effectively prevents hot water from transferring heat to the air conditioning system in reverse and ensures that the air conditioning condensing efficiency is not affected.

[0098] The system employs an intelligent collaborative control strategy, including:

[0099] (1) Power-on self-test and initialization process:

[0100] a. Power On: The system is powered on.

[0101] b. Sensor self-test: The MCU reads the status of all temperature sensors (T1, T2...), water level sensors, and TDS sensors. If a fault is detected, an alarm is triggered and the system is locked.

[0102] c. Water level detection: Detect the water level in the boiling water preparation area and the normal temperature water storage area.

[0103] d. Low water level treatment: If the water level in the hot water preparation area is lower than the safe value (e.g., 20%), and there is water in the collection tank, the purification system will be started to replenish water to the minimum working water level (e.g., 50%).

[0104] (2) Control of boiling water preparation mode ( Figure 4 ):

[0105] a. Waste heat priority heating stage: After the user triggers the hot water demand, the intelligent control unit first reads the water temperature T1 in the hot water preparation area and the outer surface temperature T2 of the compressor exhaust pipe. If T1 < T2-5℃ (the effective heat transfer temperature difference range of the heat pipe), the system shuts down the auxiliary electric heater and relies solely on the gravity heat pipe for passive heating; the control unit monitors the water temperature rise rate v (℃ / min) in real time.

[0106] b. Precise Electric Heating Supplement Stage: When the water temperature rise rate v is detected to be ≤0.8℃ / min (preset rate threshold, which can be dynamically adjusted according to the air conditioner compressor operating conditions; the threshold can be lowered to 0.6℃ / min when the compressor is under high load), and T1 <100℃ (target boiling water temperature), it is determined that the gravity heat pipe heat transfer has reached equilibrium or has stopped, and the auxiliary electric heater is automatically started to quickly heat the water to 100℃ and maintain boiling for 30 seconds to ensure thorough sterilization.

[0107] c. Cooperative Heat Preservation Phase: After the boiling water reaches the target temperature, the electric heater shuts off, and the system enters heat preservation mode, maintaining a temperature of 85–90℃. During heat preservation, if T1 < 85℃ and T2 > T1 + 5℃, the gravity heat pipe automatically restarts and recovers residual heat to supplement the heat supply; if T2 ≤ T1 + 5℃, and the residual heat is insufficient, the auxiliary electric heater is controlled to operate intermittently, working for 10–20 seconds each time, with an interval of 3–5 minutes, to maintain the heat preservation temperature. Simultaneously, the controller learns user water usage habits, such as water usage time and volume, and adjusts the heating strategy 1–2 hours in advance to ensure sufficient boiling water reserves before peak water usage and reduce heat preservation energy consumption during off-peak periods.

[0108] (3) Water quality safety control:

[0109] The water quality sensor at the outlet of the purification module monitors the TDS value (threshold ≤50ppm) and microbial indicators in real time. When the water quality is detected to be substandard, the purified water outlet valve is immediately closed, the filter flushing program is started, and the filter is backwashed for 30 seconds at a flow rate of 2L / min. If the quality is still substandard after flushing, a filter replacement reminder is issued, an audible and visual alarm is triggered, and the direct drinking water supply is cut off to ensure drinking water safety.

[0110] (4) Condensate management and control:

[0111] like Figure 5 As shown, a water level sensor is installed in the water collection pan. When the water level reaches the warning threshold, i.e., 90% of the pan's volume, condensate is preferentially guided into the purification module. If the purification module is also saturated, and both the ambient temperature water storage area and the boiling water preparation area are full, an alarm program is activated, with continuous audible and visual alarms. If no response is received within one minute, the refrigeration cycle is shut down, and only the ventilation system is activated. Manual intervention is required to prevent overflow accidents.

[0112] I. Specific application areas or related products of this invention.

[0113] The selection parameters for core components are as follows:

[0114] Gravity heat pipe: The shape is rectangular for the evaporation section, round for the insulation section, and circular with fins for the condensation section. The rectangular section is 7mm × 5mm, the outer diameter of the circular pipe is 7mm, and the total length is 240mm, of which the evaporation section is 80mm, the insulation section is 80mm, and the condensation section is 80mm. The working fluid is deionized water, and the filling volume is 50% of the internal volume of the heat pipe. The internal vacuum degree is 5Pa.

[0115] Condenser: Finned tube condenser, refrigerant copper tube outer diameter 7mm, surface polished (Ra=0.6μm);

[0116] Coupled installation: The copper pipe of the compressor exhaust pipe is pressed into a semi-circle. A high thermal conductivity silicone grease with a thermal conductivity >3.2W / (m·K) is applied between the plane of the heat pipe evaporation section and the plane of the exhaust pipe, with a thickness of 0.15mm. It is locked with stainless steel clamps with a pre-tightening force of 6N. The insulation section is wrapped with a 6mm thick ceramic fiber insulation sleeve.

[0117] Dual-zone insulated water tank: The tank is flat-shaped, facilitating heat pipe layout. The ambient temperature water storage zone has a volume of 2L, and the boiling water preparation / insulation zone has a volume of 2L; the inner liner is made of 316 stainless steel, with a 20mm thick polyurethane foam insulation layer in the middle, and an outer vacuum insulation jacket;

[0118] High-efficiency fine filtration purification module: 5μm PP melt-blown filter element + 1μm PP melt-blown filter element + KDF55 (Cu-Zn alloy) filter media layer + coconut shell sintered activated carbon filter element + UF ultrafiltration membrane module + UV-C ultraviolet sterilization module (wavelength 254nm, irradiation dose 45mJ / cm²). 2 ).

[0119] Water storage unit: It is a sealed structure made of food-grade PET material with an effective volume of 4L, making it easy for users to observe the water level. The water storage unit is connected to the output end of the multi-stage purification module through a food-grade PE water pipe. The outlet is equipped with a high-precision TDS (total dissolved solids) sensor (measurement range 0~1000mg / L, accuracy ±1%), a capacitive liquid level sensor (measurement range 0~100%, accuracy ±2%), and a post-UV germicidal lamp (wavelength 253.7nm, power 3W), with a sterilization rate of not less than 99.9%, which kills bacteria and viruses in the purified water in real time, avoids secondary pollution, and effectively ensures the biological safety of the effluent.

[0120] Auxiliary electric heater: 800W power, submersible 316L stainless steel heating tube, equipped with water level linkage anti-dry burning device;

[0121] Intelligent control unit: STM32F103 MCU, temperature sensor accuracy ±0.5℃, TDS sensor measurement range 0~1000ppm, microbial rapid detection sensor response time 3 seconds.

[0122] II. Evidence related to the technical effects obtained by the embodiments of the present invention.

[0123] Under operating conditions of 35℃ ambient temperature and 60% relative humidity, the system was started and measured. The results are as follows:

[0124] 1. Cooling performance: The system's cooling capacity reaches 3.5kW. Compared with traditional portable air conditioners, the condensation efficiency is improved by 5% due to the pre-cooling effect of condensate water.

[0125] 2. Waste heat recovery heating: Relying solely on gravity heat pipes to recover waste heat from the condenser, 1.2L of room temperature water (25℃) can be heated to 60℃ within 1 hour, with a heat transfer efficiency of 2200W / (m²). 2 ·K);

[0126] 3. Boiling water preparation: When the water temperature rises to 60℃, the rate of increase in water temperature drops to 0.6℃ / min, and the system automatically starts the auxiliary electric heater, heating the water to 100℃ within 4 minutes and maintaining boiling for 30 seconds;

[0127] 4. Anti-backflow heat transfer effect: When the boiling water temperature rises to 70℃ (65℃ higher than the outer surface temperature of the compressor exhaust pipe), the heat transfer efficiency of the gravity heat pipe decreases by 85%, there is no obvious heat backflow phenomenon, and the air conditioner condensing efficiency remains stable.

[0128] 5. Energy saving effect: The total power consumption for preparing 1.2L of boiling water (from 25℃ to 100℃) is 0.06kWh, which is 40% more energy-efficient than the pure electric heating solution (0.1kWh).

[0129] 6. Water quality safety: The TDS value of the purified effluent is 25ppm, the microbial indicators meet the GB 5749-2022 standard, and there is no secondary pollution after 72 hours of continuous operation;

[0130] 7. System stability: After 30 days of continuous operation, the gravity heat pipe showed no leakage or performance degradation, all modules worked together normally, and no downtime occurred.

[0131] It should be noted that embodiments of the present invention can be implemented in hardware, software, or a combination of both. The hardware portion can be implemented using dedicated logic; the software portion can be stored in memory and executed by a suitable instruction execution system, such as a microprocessor or dedicated-design hardware. Those skilled in the art will understand that the above-described devices and methods can be implemented using computer-executable instructions and / or included in processor control code, for example, such code provided on a carrier medium such as a disk, CD, or DVD-ROM, a programmable memory such as read-only memory (firmware), or a data carrier such as an optical or electronic signal carrier. The devices and modules of the present invention can be implemented by hardware circuitry such as very large-scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, or programmable hardware devices such as field-programmable gate arrays, programmable logic devices, etc., or by software executed by various types of processors, or by a combination of the above-described hardware circuitry and software, such as firmware.

[0132] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention, and within the spirit and principles of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A mobile air conditioning system for waste heat recovery and condensate reuse via gravity heat pipes, characterized in that, It includes an air conditioning refrigeration cycle unit, a condensate collection and pre-cooling unit, a high-efficiency fine filtration and purification module, a cold and hot dual-temperature storage and supply unit, and an intelligent control unit; The cold and hot dual-temperature storage and supply unit includes a normal temperature water storage area and a hot water preparation area that are separated from each other by a heat insulation layer. The volume of both the normal temperature water storage area and the hot water preparation area is 1.5 to 2 liters. The system is equipped with a gravity heat pipe waste heat recovery device. The evaporation section of the gravity heat pipe waste heat recovery device is fixedly installed on the outer surface of the refrigerant pipeline in the compressor exhaust section of the air conditioning refrigeration cycle unit, and the condensation section is completely immersed in the water body in the boiling water preparation area. The gravity heat pipe is used to transfer exhaust waste heat to the hot water preparation area during compressor operation, and automatically reduces heat transfer capacity when the water temperature in the hot water preparation area is 5°C or more higher than the outer surface temperature of the compressor exhaust pipe. The condensate collection and precooling unit is used to collect the condensate generated during the operation of the air conditioner and precool the condenser. The condensate is then treated by the high-efficiency fine filtration and purification module and enters the cold and hot dual-temperature storage and supply unit. The intelligent control unit is used to coordinate the operation of the gravity heat pipe and the auxiliary electric heating device according to the water temperature in the boiling water preparation area, the rate of water temperature rise, and the operating status of the refrigeration system.

2. The portable air conditioning system as described in claim 1, characterized in that, The gravity heat pipe waste heat recovery unit includes an evaporation section, an insulation section, and a condensation section. The evaporation section adopts a rectangular tube structure and is fitted to the outer surface of the nearly semi-circular compressor exhaust pipe.

3. The portable air conditioning system as described in claim 2, characterized in that, The evaporator section is fixed to the outer surface of the refrigerant pipeline in the compressor exhaust section by means of high thermal conductivity silicone grease or brazing. The contact thermal resistance between the evaporator section and the exhaust pipe is not greater than 0.0005 square kelvin per watt.

4. The portable air conditioning system as described in claim 1, characterized in that, The gravity heat pipe is filled with deionized water as the working fluid, and the filling amount is 0.4 to 0.6 of the internal volume of the heat pipe. Before filling, the vacuum degree inside the heat pipe is no greater than 10 Pa.

5. A dual-temperature storage and supply system for cold and hot temperatures based on gravity heat pipe waste heat recovery, characterized in that, It includes a hot water preparation area, a room temperature water storage area, and a gravity heat pipe condensation section that is completely submerged in the hot water preparation area; The immersion depth of the gravity heat pipe condensation section is 0.6 to 0.7 times the height of the water tank in the boiling water preparation area. When the water temperature in the boiling water preparation area is lower than the refrigerant pipe temperature in the compressor exhaust section, the gravity heat pipe is in an effective heat transfer state. When the water temperature in the boiling water preparation area is 5 degrees Celsius or more higher than the refrigerant pipe temperature in the compressor exhaust section, the heat transfer capacity of the gravity heat pipe decreases by more than or equal to 85%.

6. The dual-temperature storage and supply system for both hot and cold temperatures as described in claim 5, characterized in that, An auxiliary electric heating device and a water level sensor are installed in the hot water preparation area. The water level sensor is used to prevent the auxiliary electric heating device from starting when the water level is below a safe threshold.

7. A control method for a mobile air conditioning system based on gravity heat pipe waste heat recovery and condensate direct drinking water purification, characterized in that, Includes the following steps: After the system starts up, it collects the condensate generated during the operation of the air conditioner and pre-cools the condensate. When the water storage tank is not full, the condensate is sent to the high-efficiency fine filtration purification module for continuous purification. The purified water is introduced into the ambient temperature water storage area and the boiling water preparation area, respectively. After receiving the hot water preparation instruction, the water temperature in the hot water preparation area and the refrigerant pipeline temperature at the condenser outlet are read. The working status of the gravity heat pipe and auxiliary electric heating device is controlled based on the water temperature difference and the rate of water temperature rise.

8. The control method as described in claim 7, characterized in that, When the water temperature in the boiling water preparation area is more than 5 degrees Celsius lower than the refrigerant pipeline temperature in the compressor exhaust section, heating is carried out using only gravity heat pipes.

9. The control method as described in claim 7, characterized in that, When the rate of temperature rise in the boiling water preparation area is no greater than 0.8 degrees Celsius per minute and the water temperature has not reached 100 degrees Celsius, the auxiliary electric heating device is activated.

10. The control method as described in claim 7, characterized in that, The water temperature rise rate threshold is dynamically adjusted according to the compressor load status. When the compressor is operating under high load, the water temperature rise rate threshold is adjusted to 0.6 degrees Celsius per minute.

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