A dual-cold-source integrated fresh air machine of total heat recovery type

Abstract

The utility model discloses a kind of full-heat recovery type double cold source integrated fresh air machines, including shell, its inside one side is equipped with the first cavity with fresh air filter and the second cavity with exhaust fan, the other side is equipped with the third cavity with return air filter and the fourth cavity with air supply fan, refrigeration mechanism and heat exchanger group. Heat recovery chamber is equipped between two side cavities, full-heat recovery device is divided into two parts respectively communicated with fresh air / air exhaust channel and return air / air supply channel. The refrigeration mechanism includes compressor, plate heat exchanger and expansion valve;The heat exchanger group includes surface cooling heat exchanger, direct expansion heat exchanger and reheating heat exchanger. The utility model is integrated by integrated structure dehumidification, humidification, heating, ventilation and full-heat recovery function, using double cold source collaboration and condensing heat recovery redistribution technology, independently high-precision control of temperature and humidity is realized, system energy consumption is significantly reduced, without additional configuration outdoor unit and indoor exhaust fan, suitable for the building environment of higher air quality and energy efficiency requirement.

Description

Technical Field

[0001] This utility model relates to the field of air purification technology, and in particular to an integrated fresh air unit with efficient heat recovery and dual cold source processing capabilities. Background Technology

[0002] Traditional fresh air systems typically employ a separate indoor and outdoor unit design. Especially when handling large air volumes, the size and power of the outdoor unit increase significantly, occupying building space, affecting appearance and lighting, and its performance is easily affected by ambient temperature. While existing water-cooled dual-source fresh air systems can achieve various installation methods and integrate dehumidification, humidification, heating, and ventilation functions, employing heat recovery and independent temperature and humidity control technologies, they still suffer from problems such as system complexity, high energy consumption, and the need for additional outdoor units and exhaust fans. Utility Model Content

[0003] This invention aims to address the shortcomings of existing fresh air systems, such as system complexity, high energy consumption, and the need for additional outdoor units and exhaust fans. It provides a compact, integrated, and low-energy-consumption dual-cold-source integrated fresh air unit with full heat recovery, achieving efficient air treatment without the need for external outdoor units and independent exhaust fans.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A total heat recovery type dual-cold source integrated fresh air unit includes a housing. The housing is internally divided by partitions into five independent chambers: a first chamber, a second chamber, a third chamber, a fourth chamber, and a heat recovery chamber located between the first and second chambers and the third and fourth chambers. The first chamber is connected to a fresh air inlet on the housing and contains a fresh air filter. The second chamber is connected to an exhaust air inlet on the housing and contains an exhaust fan. The third chamber is connected to a return air inlet on the housing and contains a return air filter. The fourth chamber is connected to a supply air inlet on the housing and contains a supply fan, a refrigeration mechanism, and a heat exchanger assembly. A total heat recovery unit is installed in the heat recovery chamber, dividing it into intersecting first and second flow channels. The first flow channel connects to the first and fourth chambers, forming a fresh air-supply airflow channel. The second flow channel connects to the second and third chambers, forming a return air-exhaust airflow channel.

[0005] Preferably, the refrigeration mechanism includes a compressor, a plate heat exchanger, and an expansion valve.

[0006] Preferably, the heat exchanger group includes a surface cooling heat exchanger, a direct expansion heat exchanger, and a reheat heat exchanger arranged sequentially along the air supply direction.

[0007] Preferably, the heat exchanger assembly is integrally embedded in the partition between the fourth cavity and the heat recovery cavity.

[0008] Preferably, the housing has a first insertion slot and a second insertion slot respectively corresponding to the positions of the fresh air filter and the return air filter.

[0009] Preferably, a humidifier is also provided inside the housing, and the humidifier is located in the fourth cavity and downstream of the air supply of the heat exchanger group.

[0010] Preferably, the total heat recovery unit has a moisture-permeable but air-impermeable core, and its total heat recovery efficiency under cooling conditions at rated air volume is not less than 60%.

[0011] Preferably, both the supply fan and the exhaust fan are EC variable frequency fans.

[0012] Preferably, both the fresh air filter and the return air filter are G4 pre-filters; the fresh air filter may also be equipped with a medium-efficiency or high-efficiency filter of grade F9 to H12. Beneficial effects

[0013] This invention achieves multi-functional integration of dehumidification, humidification, cooling, heating, ventilation, and heat recovery through a five-chamber integrated structural design and the integrated application of a total heat recovery unit, significantly reducing system energy consumption and space occupation. Employing condensation heat recovery and redistribution, along with dual-cold-source collaborative control technology, it improves temperature and humidity control accuracy and energy utilization efficiency. It eliminates the need for additional outdoor units and exhaust fans, making it suitable for various residential and commercial buildings with high requirements for air quality and energy consumption. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention with part of the shell removed; Figure 3 for Figure 2 A schematic diagram showing the heat exchanger assembly cover plate removed.

[0015] Explanation of markings in the diagram: 100, shell; 110, first cavity; 120, second cavity; 130, third cavity; 140, fourth cavity; 150, fresh air inlet; 160, air supply outlet; 170, exhaust outlet; 180, return air outlet; 190, heat recovery cavity; 200, electrical control box; 300, fresh air filter; 310, first insert slot; 400, exhaust fan; 500, return air filter; 510, second insert slot; 600, air supply fan; 700, refrigeration mechanism; 800, heat exchanger assembly; 900, total heat recovery unit. Detailed Implementation

[0016] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0017] like Figures 1 to 3 As shown, the total heat recovery type dual-cold source integrated fresh air unit provided by this utility model includes a housing 100, with a first cavity 110 and a second cavity 120 on one side and a third cavity 130 and a fourth cavity 140 on the other side. A fresh air inlet 150, a supply air outlet 160, an exhaust air outlet 170, and a return air outlet 180 are respectively located at corresponding positions on the housing 100. An electrical control box 200 is also provided inside the housing for controlling the operation of the entire unit.

[0018] The air handling process is as follows: Fresh air path: Fresh air enters from the fresh air inlet 150, passes through the fresh air filter 300 (G4 pre-filter, optional F9–H12 medium and high efficiency filter) inserted in the first insertion slot 310, and then enters the first cavity 110. It then enters the heat recovery cavity 190, and undergoes heat and humidity exchange pretreatment with the return air through the total heat recovery unit 900. The pretreated fresh air enters the fourth cavity 140, and passes through the heat exchanger group 800 (including surface cooling heat exchanger, direct expansion heat exchanger and reheat heat exchanger) embedded in the partition for multi-stage dehumidification and temperature regulation. After being humidified by the humidifier (isenthalpic humidification method, with automatic cleaning and sewage discharge function), it is delivered into the room by the EC variable frequency fan 600 through the air outlet 160.

[0019] Return air path: The indoor return air enters the third cavity 130 after being filtered by the return air filter 500 inserted in the second insertion slot 510 through the return air vent 180. After entering the heat recovery cavity 190 through the third cavity 130, it completes energy exchange with the fresh air in the total heat recovery unit 900, and is then discharged to the outside by the exhaust fan 400 through the exhaust vent 170.

[0020] Core component functions: Refrigeration unit 700: includes compressor, plate heat exchanger and expansion valve, works with heat exchanger group 800 to realize refrigeration cycle, built-in dual condenser structure, can realize dehumidification and reheat and waste heat discharge.

[0021] Total Heat Recovery Unit 900: Under rated airflow and cooling conditions, the total heat recovery efficiency is not less than 60%, significantly reducing system energy consumption.

[0022] Control functions: Independent control of air supply temperature and humidity is achieved through the electrical control box 200 (air supply temperature is adjustable from 16 to 24℃ in dehumidification mode, and the air supply moisture content is stably controlled at 8.0 g / kg·da), and dynamic stable control of air volume and remote monitoring are supported (with RS485 communication interface).

[0023] This invention can handle fresh air at 40℃ / 60%RH under maximum load conditions, with a PM2.5 filtration efficiency of not less than 95%, and is suitable for residential, office and commercial building scenarios with high requirements for air quality and energy consumption.

Claims

1. A total heat recovery type dual-cold source integrated fresh air unit, comprising a housing (100), characterized in that: The housing (100) is divided into five independent chambers by partitions: a first chamber (110), a second chamber (120), a third chamber (130), a fourth chamber (140), and a heat recovery chamber (190) located between the first chamber (110), the second chamber (120), the third chamber (130), and the fourth chamber (140). The first chamber (110) is connected to a fresh air inlet (150) on the housing (100) and contains a fresh air filter (300). The second chamber (120) is connected to an exhaust outlet (170) on the housing (100) and contains an exhaust fan (400). The third chamber (130) is connected to an exhaust outlet (170) on the housing (100). The return air vent (180) is connected and a return air filter (500) is installed inside it; the fourth cavity (140) is connected to the air supply vent (160) opened on the housing (100) and a blower (600), a refrigeration mechanism (700) and a heat exchanger group (800) are installed inside it; a total heat recovery unit (900) is installed inside the heat recovery cavity (190), which divides the heat recovery cavity (190) into a first flow channel and a second flow channel that intersect each other; the first flow channel is connected to the first cavity (110) and the fourth cavity (140) to form a fresh air-supply airflow channel; the second flow channel is connected to the second cavity (120) and the third cavity (130) to form a return air-exhaust airflow channel.

2. The integrated dual-cold-source fresh air system with total heat recovery as described in claim 1, characterized in that: The refrigeration mechanism (700) includes a compressor, a plate heat exchanger, and an expansion valve.

3. The integrated dual-cold-source fresh air system with total heat recovery as described in claim 1, characterized in that: The heat exchanger group (800) includes a surface cooling heat exchanger, a direct expansion heat exchanger, and a reheat heat exchanger arranged sequentially along the air supply direction.

4. The integrated dual-cold-source fresh air system with total heat recovery as described in claim 1 or 3, characterized in that: The heat exchanger assembly (800) is integrally embedded in the partition between the fourth cavity (140) and the heat recovery cavity (190).

5. The integrated dual-cold-source fresh air system with total heat recovery as described in claim 1, characterized in that: The housing (100) has a first insertion slot (310) and a second insertion slot (510) respectively corresponding to the positions of the fresh air filter (300) and the return air filter (500).

6. The integrated dual-cold-source fresh air system with total heat recovery as described in claim 1, characterized in that: A humidifier is also provided inside the housing (100), which is located inside the fourth cavity (140) and downstream of the air supply of the heat exchanger group (800).

7. The integrated dual-cold-source fresh air system with total heat recovery as described in claim 1, characterized in that: The total heat recovery unit (900) has a moisture-permeable but air-impermeable core, and its total heat recovery efficiency under cooling conditions at rated air volume is not less than 60%.

8. The integrated dual-cold-source fresh air system with total heat recovery as described in claim 1, characterized in that: Both the blower (600) and the exhaust fan (400) are EC variable frequency fans.

9. The integrated dual-cold-source fresh air system with total heat recovery as described in claim 1, characterized in that: Both the fresh air filter (300) and the return air filter (500) are G4 pre-filters; the fresh air filter (300) can also be equipped with medium-efficiency or high-efficiency filters of grades F9 to H12.

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