Fresh air handling unit capable of independently controlling temperature and humidity

Abstract

The invention discloses a temperature and humidity independent control fresh air handling unit which comprises a fresh air handling unit body, and the fresh air handling unit body comprises an intelligent control system, a double-cold-source system, an air supply and exhaust volume independent control module, a temperature and humidity independent control module and a total heat recovery module. According to the fresh air handling unit capable of independently controlling the temperature and the humidity, deep dehumidification and accurate temperature and humidity control can be well achieved through the double-cold-source system, the problem of moisture condensation of a radiation air conditioning system in a high-humidity environment is solved, and through cooperative work of the total heat recovery module and the double-cold-source system, the use energy consumption is effectively reduced; the air supply temperature and humidity can be well and accurately adjusted, the indoor comfort degree is improved, the air supply amount and the air exhaust amount can be flexibly set and adjusted according to use requirements, indoor pressure balance is ensured, an intelligent control system achieves automatic operation and optimal management, the operation and maintenance cost is reduced, and the intelligent control system is highly matched with a radiation air conditioner system; and stable operation, high efficiency and energy conservation of the system are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of fresh air units, and in particular to a fresh air unit with independent temperature and humidity control. Background Art

[0002] Radiant air conditioning systems are known for their high energy efficiency and comfort, but they are prone to condensation in high humidity environments, affecting system operation and the indoor environment. Traditional fresh air dehumidification units have relatively simple air treatment methods but suffer from the following drawbacks: Usually, a temperature and humidity coupled air treatment process is adopted. The supply air temperature after dehumidification is too low or too high, and it cannot meet the requirements of efficient dehumidification and precise temperature control at the same time; there is no precise supply air temperature and humidity control means, or only one of the parameters can be controlled. For example, the dehumidification function only supports the switch and cannot accurately control the supply air moisture content, and the supply air temperature is uncontrollable after the dehumidification function is turned on, resulting in insufficient dehumidification capacity or excessive deviation of the supply air temperature, which simply cannot meet the use requirements; the supply and exhaust air volume cannot be stably controlled, and the indoor air volume balance and micro-positive pressure environment cannot be guaranteed, resulting in large air infiltration of the enclosing structure, causing unstable indoor humidity and cleanliness, resulting in condensation or excessive energy consumption of the radiation system; there is no heat recovery device or the heat recovery device is too inefficient, resulting in excessive fresh air energy consumption. Therefore, a temperature and humidity independent control fresh air unit is proposed, which can achieve efficient dehumidification, independent control of temperature and humidity, and independent adjustment of supply and exhaust air volume to meet the needs of efficient and stable operation of the radiation air-conditioning system. Summary of the Invention

[0003] In response to the shortcomings of the existing technology, the present invention provides a fresh air unit with independent temperature and humidity control, which solves the problems of being unable to simultaneously meet the needs of efficient dehumidification and precise temperature control, the lack of precise supply air temperature and humidity control means, the inability to stably control the supply and exhaust air volumes, and the lack of a heat recovery device or the low efficiency of the heat recovery device.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a temperature and humidity independently controlled fresh air unit, including a fresh air unit, the fresh air unit including an intelligent control system, a dual cold source system, an independent supply and exhaust air volume control module, an independent temperature and humidity control module and a full heat recovery module, the output end of the intelligent control system is respectively connected to the input end of the dual cold source system, the independent supply and exhaust air volume control module, the independent temperature and humidity control module and the full heat recovery module, the output end of the dual cold source system is respectively connected to the input end of the independent supply and exhaust air volume control module and the independent temperature and humidity control module, and the independent temperature and humidity control module is bidirectionally connected to the full heat recovery module.

[0005] Preferably, the intelligent control system includes a central processing unit, a supply air temperature and humidity sensor, a supply and exhaust air volume sensor, a temperature sensor, a dew point temperature sensor, a battery, a control button and a return air temperature and humidity sensor.

[0006] Preferably, the dual cold source system includes a reheat condenser, an exhaust condenser, a chiller and a built-in compression refrigeration circuit, and the independent supply and exhaust air volume control module includes a supply air variable frequency fan and a heat exhaust variable frequency fan.

[0007] Preferably, the temperature and humidity independent control module includes a surface cooler, a reheat condenser and an evaporator, and the full heat recovery module includes a full heat exchanger and a heat recovery core.

[0008] Preferably, the supply air temperature and humidity sensor, supply and exhaust air volume sensor, temperature sensor, dew point temperature sensor, heat recovery core, supply air variable frequency fan, exhaust heat variable frequency fan, surface cooler, reheat condenser, evaporator and exhaust condenser are all installed inside the fresh air unit.

[0009] Preferably, the fresh air unit is provided with a return air inlet, a fresh air inlet, an exhaust outlet and an air supply outlet in sequence from left to right.

[0010] Preferably, the output ends of the supply air temperature and humidity sensor, supply and exhaust air volume sensor, temperature sensor, dew point temperature sensor and return air temperature and humidity sensor are all connected to the input end of the data comparator, and the output end of the central processing unit is respectively connected to the input end of the data comparator, the heat recovery core, the supply air variable frequency fan, the exhaust heat variable frequency fan, the surface cooler, the reheat condenser, the evaporator and the exhaust condenser.

[0011] Preferably, the output end of the data comparator is connected to the input end of the feedback module, the output ends of the feedback module and the control button are both connected to the input end of the central processing unit, and the output end of the battery is respectively connected to the input ends of the supply air temperature and humidity sensor, the supply and exhaust air volume sensor, the temperature sensor, the dew point temperature sensor, the control button and the return air temperature and humidity sensor. Beneficial effects

[0012] The present invention provides a fresh air unit with independent temperature and humidity control. Compared with existing technologies, it has the following advantages: The present invention uses a dual cold source system to achieve deep dehumidification and precise temperature and humidity control, solving the condensation problem of the radiant air-conditioning system in a high humidity environment. The full heat recovery module and the dual cold source system work together to effectively reduce energy consumption, and can achieve precise adjustment of the supply air temperature and humidity, thereby improving indoor comfort. The present invention can flexibly set and adjust the supply and exhaust air volumes according to usage requirements to ensure indoor pressure balance. The intelligent control system realizes automated operation and optimized management, reduces operation and maintenance costs, and is highly compatible with the radiant air-conditioning system to ensure stable system operation and high efficiency and energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic block diagram of the fresh air unit of the present invention; Figure 3 It is a flow chart of the block diagram of the present invention.

[0014] In the figure: 1. Fresh air unit; 2. Intelligent control system; 3. Dual cooling source system; 4. Independent control module for supply and exhaust air volume; 5. Independent control module for temperature and humidity; 6. Full heat recovery module; 7. Central processing unit; 8. Supply air temperature and humidity sensor; 9. Supply and exhaust air volume sensor; 10. Temperature sensor; 11. Dew point temperature sensor; 12. Heat recovery core; 13. Supply air variable frequency fan; 14. Exhaust heat variable frequency fan; 15. Surface cooler; 16. Reheat condenser; 17. Evaporator; 18. Exhaust condenser; 19. Data comparator; 20. Feedback module; 21. Battery; 22. Control buttons; 23. Return air temperature and humidity sensor. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0016] See also Figure 1-3 The present invention provides a technical solution: a temperature and humidity independently controlled fresh air unit, comprising a fresh air unit 1, the fresh air unit 1 comprising an intelligent control system 2, a dual cold source system 3, an independent supply and exhaust air volume control module 4, an independent temperature and humidity control module 5 and a full heat recovery module 6, the output end of the intelligent control system 2 is respectively connected to the input end of the dual cold source system 3, the independent supply and exhaust air volume control module 4, the independent temperature and humidity control module 5 and the full heat recovery module 6, the output end of the dual cold source system 3 is respectively connected to the input end of the independent supply and exhaust air volume control module 4 and the independent temperature and humidity control module 5, and the independent temperature and humidity control module 5 is bidirectionally connected to the full heat recovery module 6.

[0017] As a preferred solution, the intelligent control system 2 includes a central processor 7, a supply air temperature and humidity sensor 8, a supply and exhaust air volume sensor 9, a temperature sensor 10, a dew point temperature sensor 11, a battery 21, a control button 22 and a return air temperature and humidity sensor 23.

[0018] As a preferred solution, in order to adjust the temperature and humidity of the supply and exhaust air, the dual cold source system 3 includes a reheat condenser 16, an exhaust condenser 18, a chiller and a built-in compression refrigeration circuit. The dual cold source system 3 consists of a primary cold source and a secondary cold source. The primary cold source uses chilled water provided by the chiller for preliminary cooling and dehumidification of the fresh air. The secondary cold source uses a built-in compression refrigeration circuit for deep dehumidification and precise temperature adjustment of the supply air to ensure that the supply air temperature and humidity match the requirements of the radiation air-conditioning system. The dual cold source system 3 can operate independently or work together according to demand to improve energy efficiency.

[0019] As a preferred solution, in order to facilitate indoor air supply and exhaust, the independent air supply and exhaust air volume control module 4 includes an air supply variable frequency fan 13 and a heat exhaust variable frequency fan 14.

[0020] As a preferred solution, in order to facilitate the adjustment of the temperature and humidity of the air, the temperature and humidity independent control module 5 includes a surface cooler 15, a reheat condenser 16 and an evaporator 17. The temperature and humidity independent control module 5 is equipped with a high-precision sensor and a PID controller. The surface cooler 15 is supplied with water by a primary cold source to achieve primary cooling and dehumidification of the fresh air. The evaporator 17 is used for deep dehumidification of the fresh air to accurately control the supply air humidity. The reheat condenser 16 is used to accurately adjust the supply air temperature. The above three devices are jointly controlled by the controller to achieve precise adjustment of temperature and humidity.

[0021] As a preferred solution, in order to recover temperature and humidity heat, the full heat recovery module 6 includes a full heat exchanger and a heat recovery core 12. The full heat exchanger adopts a polymer membrane structure, taking into account the recovery of heat and humidity at the same time.

[0022] As a preferred solution, the supply air temperature and humidity sensor 8, the supply and exhaust air volume sensor 9, the temperature sensor 10, the dew point temperature sensor 11, the heat recovery core 12, the supply air variable frequency fan 13, the exhaust heat variable frequency fan 14, the surface cooler 15, the reheat condenser 16, the evaporator 17 and the exhaust condenser 18 are all installed inside the fresh air unit 1.

[0023] As a preferred solution, the fresh air unit 1 is provided with a return air inlet, a fresh air inlet, an exhaust outlet and an air supply outlet in sequence from left to right.

[0024] As a preferred solution, the output ends of the supply air temperature and humidity sensor 8, the supply and exhaust air volume sensor 9, the temperature sensor 10, the dew point temperature sensor 11 and the return air temperature and humidity sensor 23 are all connected to the input end of the data comparator 19, and the output end of the central processing unit 7 is respectively connected to the input end of the data comparator 19, the heat recovery core 12, the supply air variable frequency fan 13, the exhaust heat variable frequency fan 14, the surface cooler 15, the reheat condenser 16, the evaporator 17 and the exhaust condenser 18, the output end of the data comparator 19 is connected to the input end of the feedback module 20, the output end of the feedback module 20 and the control button 22 are both connected to the input end of the central processing unit 7, and the output end of the battery 21 is respectively connected to the input end of the supply air temperature and humidity sensor 8, the supply and exhaust air volume sensor 9, the temperature sensor 10, the dew point temperature sensor 11, the control button 22 and the return air temperature and humidity sensor 23.

[0025] During use, the outdoor fresh air enters the full heat recovery module 6 after being filtered. The full heat recovery module 6 uses a high-efficiency full heat exchanger to achieve heat and humidity exchange between the fresh air and the exhaust air, preliminarily reducing energy loss. The fresh air then enters the primary cold source of the dual cold source system 3. The primary cold source uses chilled water provided by the chiller to perform preliminary cooling and dehumidification on the fresh air. It then enters the secondary cold source and performs deep dehumidification and precise temperature regulation on the supply air through the built-in compression refrigeration circuit. The supply and exhaust air volumes are set separately according to user needs through the independent supply and exhaust air volume control module 4. The supply air temperature and humidity sensor 8 and the supply and exhaust air volume sensor 9 of the intelligent control system 2 monitor the supply air volume in real time, and compare the monitored supply air volume with the set parameters through the data comparator 19. If the supply air volume is higher than the set parameters, the central processing unit 7 will control the supply air variable frequency fan 13 and the heat exhaust variable frequency fan 14 to automatically adjust and reduce the power, thereby reducing the supply air volume. If the supply air volume is lower than the set parameters, the supply air variable frequency fan 13 and the heat exhaust variable frequency fan 14 will be controlled to automatically adjust and increase the power. The parameters are pre-set through the temperature and humidity independent control module 5, and the supply air temperature and humidity are monitored by the supply air temperature and humidity sensor 8. Through the above operations, the surface cooler 15, the reheat condenser 16 and the evaporator 17 will automatically adjust the supply air temperature and humidity to avoid condensation in the radiation air conditioning system, ensure that the supply air temperature and humidity match the requirements of the radiation air conditioning system, ensure indoor pressure balance and air circulation, and ensure high efficiency, energy saving and comfort.

Claims

1. A fresh air unit with independent temperature and humidity control, comprising a fresh air unit (1), characterized in that: The fresh air unit (1) comprises an intelligent control system (2), a dual cold source system (3), an independent control module for supply and exhaust air volume (4), an independent temperature and humidity control module (5), and a full heat recovery module (6); the output end of the intelligent control system (2) is respectively connected to the input ends of the dual cold source system (3), the independent control module for supply and exhaust air volume (4), the independent temperature and humidity control module (5), and the full heat recovery module (6); the output end of the dual cold source system (3) is respectively connected to the input ends of the independent control module for supply and exhaust air volume (4) and the independent temperature and humidity control module (5); and the independent temperature and humidity control module (5) is bidirectionally connected to the full heat recovery module (6).

2. A fresh air unit with independent temperature and humidity control according to claim 1, characterized in that: The intelligent control system (2) includes a central processing unit (7), a supply air temperature and humidity sensor (8), a supply and exhaust air volume sensor (9), a temperature sensor (10), a dew point temperature sensor (11), a battery (21), a control button (22), and a return air temperature and humidity sensor (23).

3. The temperature and humidity independent control fresh air unit according to claim 2, characterized in that: The dual cold source system (3) includes a reheat condenser (16), an exhaust condenser (18), a chiller and a built-in compression refrigeration circuit, and the independent supply and exhaust air volume control module (4) includes an air supply variable frequency fan (13) and a heat exhaust variable frequency fan (14).

4. The temperature and humidity independent control fresh air unit according to claim 3, characterized in that: The temperature and humidity independent control module (5) comprises a surface cooler (15), a reheat condenser (16) and an evaporator (17), and the full heat recovery module (6) comprises a full heat exchanger and a heat recovery core (12).

5. The temperature and humidity independent control fresh air unit according to claim 4, characterized in that: The supply air temperature and humidity sensor (8), the supply and exhaust air volume sensor (9), the temperature sensor (10), the dew point temperature sensor (11), the heat recovery core (12), the supply air variable frequency fan (13), the exhaust heat variable frequency fan (14), the surface cooler (15), the reheat condenser (16), the evaporator (17) and the exhaust condenser (18) are all installed inside the fresh air unit (1).

6. The temperature and humidity independent control fresh air unit according to claim 1, characterized in that: The fresh air unit (1) is provided with a return air inlet, a fresh air inlet, an exhaust air outlet and an air supply outlet in sequence from left to right.

7. The temperature and humidity independent control fresh air unit according to claim 4, characterized in that: The output ends of the supply air temperature and humidity sensor (8), the supply and exhaust air volume sensor (9), the temperature sensor (10), the dew point temperature sensor (11) and the return air temperature and humidity sensor (23) are all connected to the input end of the data comparator (19), and the output end of the central processing unit (7) is respectively connected to the input ends of the data comparator (19), the heat recovery core (12), the supply air variable frequency fan (13), the exhaust heat variable frequency fan (14), the surface cooler (15), the reheat condenser (16), the evaporator (17) and the exhaust condenser (18).

8. The temperature and humidity independent control fresh air unit according to claim 7, characterized in that: The output end of the data comparator (19) is connected to the input end of the feedback module (20), the output ends of the feedback module (20) and the control button (22) are both connected to the input end of the central processing unit (7), and the output end of the battery (21) is respectively connected to the input ends of the supply air temperature and humidity sensor (8), the supply and exhaust air volume sensor (9), the temperature sensor (10), the dew point temperature sensor (11), the control button (22) and the return air temperature and humidity sensor (23).

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