Indirect evaporation temperature and humidity separate control air conditioning unit

Abstract

The utility model relates to the technical field of building heating and ventilation, in particular to an indirect evaporation temperature and humidity separate control air conditioning unit which comprises a filter section, an air feeder section, a heat recovery section, an indirect evaporation cooling section, a surface cooling section, a temperature and humidity independent control section, a humidification section and an air supply section which are sequentially connected. Redundant heat is sent to the water tank in the indirect evaporative cooling section through the heat exchanger by utilizing the circulating water pump, the redundant heat is taken away by utilizing water in the water tank, the evaporative cooling efficiency is improved, and then the heat is discharged outdoors by secondary air.

Description

Technical Field

[0001] The utility model relates to the technical field of building heating and ventilation, in particular to an indirect evaporation temperature and humidity control air-conditioning unit. Background Art

[0002] Indirect evaporative cooling air conditioners are highly efficient and energy-efficient, and are currently used in data centers, hospitals, large commercial facilities, and other industries. They typically utilize an indirect evaporative cooling section combined with a surface cooling section to process fresh air to meet indoor environmental requirements. For functional rooms with high humidity requirements, indirect evaporative cooling air conditioners typically use a surface cooler to dehumidify the fresh air. However, once the indoor humidity requirement is met, the fresh air temperature is too low to be directly delivered indoors, requiring reheating to meet indoor temperature and humidity requirements. Common reheating methods include electric heating or reheat coils, both of which significantly increase system energy consumption.

[0003] Indirect evaporative cooling cools outdoor fresh air, without changing the outdoor air's moisture content. This reduces its efficiency in high-humidity areas or on high-humidity days. Furthermore, the unit's surface cooling section has limited dehumidification capacity, resulting in indoor humidity levels that cannot meet requirements. This limits the application areas and regions of evaporative cooling air conditioning units. To meet indoor humidity requirements, the heat removed by fresh air dehumidification is not utilized, resulting in energy waste. The use of electric heating or reheat coils increases system energy consumption and operating costs. Utility Model Content

[0004] Aiming at the problem of low utilization rate of heat removed by fresh air dehumidification in the prior art, the utility model provides an indirect evaporation temperature and humidity control air conditioning unit.

[0005] The utility model is realized through the following technical solutions:

[0006] An indirect evaporative temperature and humidity separate control air-conditioning unit comprises a filter section, a blower section, a heat recovery section, an indirect evaporative cooling section, a surface cooling section, an independent temperature and humidity control section, a humidifying section and an air supply section which are connected in sequence, with the inlet of the filter section being the fresh air inlet, and the outlet of the air supply section being the treated fresh air outlet; a filter is arranged in the filter section, the blower section is provided with a blower, the heat recovery section is provided with a heat recovery device, a first air inlet of the heat recovery device is connected to the air outlet of the blower, and a first air outlet of the heat recovery device is connected to the air inlet of the indirect evaporative cooling section; the indirect evaporative cooling section is provided with an indirect evaporative cooling unit, the surface cooling section is provided with a surface cooler, the independent temperature and humidity control section is provided with an independent temperature and humidity control unit, and the humidifying section is provided with a humidifier.

[0007] Preferably, the heat recovery device adopts a plate-fin heat exchanger.

[0008] Preferably, the heat recovery section is connected to an indoor exhaust pipe, the air outlet of the indoor exhaust pipe is connected to the second air inlet of the heat recovery device, and the second air outlet of the heat recovery device is connected to the exhaust outlet of the heat recovery section.

[0009] Preferably, an ion air purifier, an exhaust filter and an exhaust fan are sequentially arranged in the pipe of the indoor exhaust main.

[0010] Preferably, the indirect evaporative cooling section includes a water tank, a condensate tray, an indirect evaporative cooler and a water distributor. The water distributor is arranged above the indirect evaporative cooling section, the indirect evaporative cooler is located below the water distributor, the condensate tray is located at the water outlet of the secondary air of the indirect evaporative cooler, the water outlet of the condensate tray is connected to the water tank, and the water inlet end of the water distributor is connected to the water tank through a lifting water pump.

[0011] Preferably, a heat discharge outlet is provided on the indirect evaporative cooling section.

[0012] Preferably, the temperature and humidity independent control unit includes an evaporator, a variable frequency compressor, a condenser, a heat exchanger and a throttle. The outlet of the evaporator is connected to the inlet of the variable frequency compressor, the outlet of the variable frequency compressor is connected to the inlet of the condenser, the condenser is connected to the hot end of the heat exchanger, and the cold end of the heat exchanger is connected to the water tank through a circulating water pump.

[0013] Preferably, an electric regulating valve is provided on the pipeline between the circulating water pump and the heat exchanger, and when the variable frequency compressor reduces the frequency, the opening of the electric regulating valve increases.

[0014] Preferably, the surface cooling section uses high-temperature chilled water.

[0015] Preferably, a pollutant collector is provided at the outlet of the air supply section.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This utility model is an indirect evaporative temperature and humidity controlled air-conditioning unit that cools the fresh air once through the indirect evaporative cooling section, thereby improving the energy efficiency of the system, and then performs deep dehumidification through the independent temperature and humidity control section, and utilizes condensation heat recovery instead of reheating measures, which can significantly reduce operating energy consumption. At the same time, the independent temperature and humidity control section has better dehumidification capacity, which can meet the needs of areas with high humidity requirements, such as operating rooms, food workshops, etc., and can operate normally in high humidity environments to meet process use requirements.

[0018] The excess heat is sent to the water tank in the indirect evaporative cooling section through the heat exchanger using a circulating water pump. The water in the water tank removes the excess heat, improving the evaporative cooling efficiency. The secondary air then discharges the heat outdoors.

[0019] Furthermore, the plate-fin heat recovery section is used to pre-cool or pre-heat the outdoor fresh air. In summer, pre-cooling reduces the installed capacity of the indirect evaporative cooling section, while in winter, pre-heating increases the inlet temperature of the fresh air to ensure normal operation of the unit.

[0020] Furthermore, for areas that require humidification, the humidity of the supply air is precisely adjusted through the humidification section to meet indoor process requirements.

[0021] Furthermore, during the system exhaust process, according to the indoor air pollution situation, functional area room exhaust fans, exhaust filters and high-energy ion air purifiers are added to the exhaust section to ensure that the air discharged into the atmosphere meets the atmospheric pollution emission standards.

[0022] Furthermore, the temperature and humidity independent control section uses the evaporator to perform deep dehumidification on the fresh air for secondary cooling to ensure that the indoor humidity requirements are met. The amount of moisture content can be achieved through the variable frequency compressor; the condenser is used to release heat to reheat the fresh air, effectively utilizing the condensation heat, without the need for electric heating, reheat coils and other measures, which can reduce system energy consumption.

[0023] Furthermore, the surface cooling section uses high-temperature chilled water to improve the cooling efficiency of the air-conditioning unit, reduce the operating energy consumption of the air-conditioning system, and save energy costs.

[0024] Furthermore, the pollutant collector can monitor the air quality of the fresh air delivered to the room in real time. The detector can be set accordingly according to the place of use. This is because long-term use of filters, plate-fin heat exchangers, etc. will cause leakage points. Once pollutants are detected, the exhaust system will stop running immediately. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The utility model is a schematic diagram of an indirect evaporation temperature and humidity control air-conditioning unit.

[0026] In the figure, 1. Filtration section; 2. Air supply fan section; 3. Heat recovery section; 4. Indirect evaporative cooling section; 5. Surface cooler; 6. Evaporator; 7. Condenser; 8. Independent temperature and humidity control section; 9. Variable frequency compressor; 10. Heat exchanger; 11. Circulating water pump; 12. Humidification section; 13. Air supply section; 14. Pollutant collector; 15. Exhaust fan; 16. Exhaust filter; 17. Ion air purifier; 18. Water tank. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below with reference to specific embodiments, which are intended to explain rather than limit the present invention.

[0028] The utility model discloses an indirect evaporation temperature and humidity control air conditioning unit, referring to Figure 1It includes a filter section 1, a blower section 2, a heat recovery section 3, an indirect evaporative cooling section 4, a surface cooling section, an independent temperature and humidity control section 8, a humidification section 12 and an air supply section 13 connected in sequence. The inlet of the filter section 1 is the fresh air inlet, and the outlet of the air supply section 13 is the treated fresh air outlet.

[0029] A filter is provided in the filtration section 1, a blower section 2 is provided with a blower, and a heat recovery device is provided in the heat recovery section 3. The first air inlet of the heat recovery device is connected to the air outlet of the blower, and the first air outlet of the heat recovery device is connected to the air inlet of the indirect evaporative cooling section 4. In this embodiment, the recovery device adopts a plate-fin heat exchanger.

[0030] Heat recovery section 3 is connected to the indoor exhaust main, whose outlet is connected to the second air inlet of the heat recovery unit, which in turn is connected to the exhaust outlet of heat recovery section 3. An ion air purifier 17, an exhaust filter 16, and an exhaust fan 15 are sequentially installed within the indoor exhaust main. After being processed (through the ion air purifier 17, exhaust filter 16, and exhaust fan 15), the room's exhaust air is connected to heat recovery section 3 via the indoor exhaust main. The exhaust outward-swept plate-fin heat recovery unit simultaneously transfers the cooling (heating) energy of the exhaust air to the fresh air, pre-cooling (heating) the fresh air before it is discharged outdoors.

[0031] The indirect evaporative cooling section 4 is equipped with an indirect evaporative cooling unit, which includes a water tank 18, a condensate pan, an indirect evaporative cooler, and a water distributor. The water distributor is located above the indirect evaporative cooling section 4, and the indirect evaporative cooler is located below the water distributor. The condensate pan is located at the water outlet of the indirect evaporative cooler. The water outlet of the condensate pan is connected to the water tank 18, and the water inlet of the water distributor is connected to the water tank 18 via a lifting water pump. In addition, a heat discharge port is provided on the indirect evaporative cooling section 4. The plate-fin heat recovery section 3 is used to precool or preheat the outdoor fresh air. In summer, precooling reduces the installed capacity of the indirect evaporative cooling section 4. In winter, preheating increases the fresh air inlet temperature, ensuring normal operation of the unit.

[0032] The surface cooling section is equipped with a surface cooler 5. The surface cooling section uses high-temperature chilled water to improve the cooling efficiency of the air-conditioning unit, reduce the operating energy consumption of the air-conditioning system, and save energy costs. This not only conforms to the current green and energy-saving environmental protection concept, but also provides a strong guarantee for the efficient and stable operation of the air-conditioning system. The temperature of high-temperature chilled water is relatively high, which means that under the same cooling capacity, the amount of chilled water required will be reduced, thereby reducing the energy consumption of the water pump. Secondly, when the high-temperature chilled water exchanges heat with the air in the surface cooler 5, the heat exchange efficiency is higher due to the relatively large temperature difference, so it can reduce the air temperature more quickly, improving the cooling response speed of the air-conditioning unit.

[0033] The independent temperature and humidity control section 8 is equipped with an independent temperature and humidity control unit. This unit is a closed system connected via refrigerant pipes and includes an evaporator 6, a variable-frequency compressor 9, a condenser 7, a heat exchanger 10, and a throttle. The outlet of the evaporator 6 is connected to the inlet of the variable-frequency compressor 9, which in turn is connected to the condenser 7. The condenser 7 is connected to the hot end of the heat exchanger 10, and the cold end of the heat exchanger 10 is connected to the water tank 18 via a circulating water pump 11. An electric regulating valve is installed in the pipeline between the circulating water pump 11 and the heat exchanger 10. When the variable-frequency compressor 9 reduces its frequency, the opening of the electric regulating valve increases. The evaporator 6 uses secondary cooling to achieve deep dehumidification of the fresh air, ensuring that indoor humidity requirements are met. The amount of moisture content can be adjusted by the variable-frequency compressor 9. The condenser 7 releases heat to reheat the fresh air, effectively utilizing the condensation heat and eliminating the need for electric heating or reheat coils, thereby reducing system energy consumption.

[0034] The humidifying section 12 is provided with a humidifier. In this embodiment, the humidifier adopts an electrode humidifier or a steam humidifier. A suitable humidifier type can also be selected according to the specific use environment and requirements.

[0035] A pollutant collector 14 is provided at the outlet of the air supply section 13, which can monitor in real time and accurately evaluate the air quality of the fresh air delivered to the room. The corresponding air quality detection device is installed according to the specific place of use and needs. In the utility model, during the long-term operation of the system, key components such as filters and plate-fin heat exchangers may leak or degrade due to long-term use, wear or improper maintenance. Through the setting of the pollutant collector 14, when the pollutant collector 14 detects any pollutant exceeding the standard or abnormal situation, the system will immediately trigger an alarm and automatically stop running to prevent polluted air from being delivered into the room. This immediate response mechanism can minimize the impact of pollutants on the indoor environment and protect people's health and safety.

[0036] The implementation principle of the indirect evaporative temperature and humidity controlled air-conditioning unit of the present invention is as follows: after the exhaust air from the service area of ​​the air-conditioning unit is treated to meet the emission standards, it is sent by the exhaust fan to the plate-fin heat recovery section 3 for sensible heat exchange with the fresh air and then discharged to the outside, which improves energy utilization efficiency and reduces the energy consumption of the unit. Specifically: the fresh air is filtered by the filter section 1 and is sent by the supply fan to the plate-fin heat recovery section 3. The fresh air exchanges sensible heat with the treated exhaust air in the room (pre-cooling) and is then sent to the indirect evaporative cooling section 4 for isohumidification cooling. It is then sent to the surface cooling section. The surface cooler 5 is used for primary cooling and dehumidification. The fresh air is then deeply dehumidified by the evaporator 6 in the temperature and humidity independent control section 8. The precise control of deep dehumidification is achieved through compressor frequency conversion. The condenser 7 then releases heat to reheat the fresh air. According to the indoor environment requirements, the heat exchanger 10 is connected to the water tank 18 of the indirect evaporative section. The water in the water tank 18 is used to take away excess heat. The temperature increase of the water tank 18 can improve the evaporative cooling efficiency. The secondary air then takes the excess heat out of the room. The amount of heat removed is controlled by adjusting the water flow through the heat exchanger 10, thereby achieving precise control of the temperature of the fresh air after reheating.

[0037] The utility model relates to an indirect evaporative temperature and humidity controlled air-conditioning unit, which cools the fresh air once through the indirect evaporative cooling section 4, thereby improving the energy efficiency of the system, and then performs deep dehumidification through the independent temperature and humidity control section 8, and utilizes condensation heat recovery instead of reheating measures, which can significantly reduce operating energy consumption. At the same time, the independent temperature and humidity control section 8 has better dehumidification capacity, which can meet the needs of areas with high humidity requirements, such as operating rooms, food workshops, etc., and can operate normally in high humidity environments, meeting the requirements of process use.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to impose any limitation on the technical solution of the present invention. Those skilled in the art should understand that, without departing from the spirit and principles of the present invention, the technical solution can also be subjected to several simple modifications and replacements, and these modifications and replacements are also within the scope of protection covered by the claims.

Claims

1. An indirect evaporation temperature and humidity control air conditioning unit, characterized in that: The invention comprises a filter section (1), a blower section (2), a heat recovery section (3), an indirect evaporative cooling section (4), a surface cooling section, a temperature and humidity independent control section (8), a humidifying section (12) and an air supply section (13) which are connected in sequence, wherein the inlet of the filter section (1) is the fresh air inlet, and the outlet of the air supply section (13) is the treated fresh air outlet; a filter is arranged in the filter section (1), the blower section (2) is provided with a blower, the heat recovery section (3) is provided with a heat recovery device, the first air inlet of the heat recovery device is connected to the air outlet of the blower, and the first air outlet of the heat recovery device is connected to the air inlet of the indirect evaporative cooling section (4); the indirect evaporative cooling section (4) is provided with an indirect evaporative cooling unit, the surface cooling section is provided with a surface cooling device (5), the temperature and humidity independent control section (8) is provided with a temperature and humidity independent control unit, and the humidifying section (12) is provided with a humidifier.

2. The indirect evaporation temperature and humidity control air conditioning unit according to claim 1, characterized in that: The heat recovery device adopts plate-fin heat exchanger.

3. The indirect evaporation temperature and humidity control air conditioning unit according to claim 1, characterized in that: The heat recovery section (3) is connected to an indoor exhaust main pipe, the air outlet of the indoor exhaust main pipe is connected to the second air inlet of the heat recovery device, and the second air outlet of the heat recovery device is connected to the exhaust outlet of the heat recovery section (3).

4. The indirect evaporation temperature and humidity control air conditioning unit according to claim 3, characterized in that: An ion air purifier (17), an exhaust filter (16) and an exhaust fan (15) are sequentially arranged in the pipe of the indoor exhaust main.

5. The indirect evaporation temperature and humidity control air conditioning unit according to claim 1, characterized in that: The indirect evaporative cooling section (4) comprises a water tank (18), a condensate tray, an indirect evaporative cooler and a water distributor. The water distributor is arranged above the indirect evaporative cooling section (4), the indirect evaporative cooler is located below the water distributor, the condensate tray is located at the water outlet of the secondary air of the indirect evaporative cooler, the water outlet of the condensate tray is connected to the water tank (18), and the water inlet end of the water distributor is connected to the water tank (18) via a lifting water pump.

6. The indirect evaporation temperature and humidity control air conditioning unit according to claim 5, characterized in that: The indirect evaporative cooling section (4) is provided with a heat discharge outlet.

7. The indirect evaporation temperature and humidity control air conditioning unit according to claim 5, characterized in that: The temperature and humidity independent control unit comprises an evaporator (6), a variable frequency compressor (9), a condenser (7), a heat exchanger (10) and a throttle. The outlet of the evaporator (6) is connected to the inlet of the variable frequency compressor (9), the outlet of the variable frequency compressor (9) is connected to the inlet of the condenser (7), the condenser (7) is connected to the hot end of the heat exchanger (10), and the cold end of the heat exchanger (10) is connected to the water tank (18) through a circulating water pump (11).

8. The indirect evaporation temperature and humidity control air conditioning unit according to claim 7, characterized in that: An electric regulating valve is provided on the pipeline between the circulating water pump (11) and the heat exchanger (10). When the frequency conversion compressor (9) reduces the frequency, the opening of the electric regulating valve increases.

9. The indirect evaporation temperature and humidity control air conditioning unit according to claim 1, characterized in that: The surface cooling section uses high-temperature chilled water.

10. The indirect evaporation temperature and humidity control air conditioning unit according to claim 1, characterized in that: A pollutant collector (14) is provided at the outlet of the air supply section (13).

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