CN112902325A - Air heat and humidity treatment method and unit for primary return air conditioning system - Google Patents
Air heat and humidity treatment method and unit for primary return air conditioning system Download PDFInfo
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- CN112902325A CN112902325A CN202110233441.6A CN202110233441A CN112902325A CN 112902325 A CN112902325 A CN 112902325A CN 202110233441 A CN202110233441 A CN 202110233441A CN 112902325 A CN112902325 A CN 112902325A
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- Prior art keywords
- air
- return air
- conditioning system
- reheater
- heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
- F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F6/00—Air-humidification, e.g. cooling by humidification
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/54—Free-cooling systems
Abstract
The invention relates to the technical field of air conditioners, in particular to an air heat and humidity treatment method and a unit for a primary return air conditioning system. The air heat and humidity treatment method of the primary return air conditioning system is characterized in that outdoor fresh air is treated by heat and humidity treatment equipment independently and then is mixed with indoor return air for the first time to reach an air supply state point and then is sent into a room. The air treatment unit of the primary return air conditioning system is provided with an outdoor fresh air inlet, a mixing section is arranged between the water spray chamber and the reheater II, an indoor return air inlet is arranged on the mixing section, and outdoor air is mixed with indoor return air in sequence after passing through the preheater and the water spray chamber to reach an air supply state point and is sent into a room through the reheater II. The invention can fully utilize the return air energy, reduce or even cancel reheating, and greatly reduce the energy consumption of the existing one-time return air conditioning system of the whole air.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air heat and humidity treatment method and a unit for a primary return air conditioning system.
Background
Air conditioning systems can be divided into full fresh air (direct flow), full return air (closed) and partial return air (hybrid, including primary and secondary return air) systems according to the air source of the system.
The definition of the traditional full-air primary return air conditioning system is that fresh air and return air are firstly mixed once, the mixing process is carried out before heat and humidity treatment equipment, then heat and humidity treatment is carried out, and the air reaches an air supply state point and is sent into a room.
The traditional all-air primary return air conditioning system belongs to a common centralized air conditioning system, and is the earliest, the most basic, the most typical and widely applied air conditioning system. The system forms a primary return air conditioning system (generally suitable for occasions with low requirements on comfort air conditioning and air conditioning precision) for supplying air by using the machine dew point and a primary return air conditioning system (generally suitable for occasions with high requirements on air conditioning precision) for supplying air by using a reheater for reheating.
In the primary return air conditioning system using the reheater for reheating air supply, as the return air participates in the processes of cooling, drying and reheating air treatment, excessive reheating consumption and cold and heat balance are generated, and the cold consumption and heat consumption of the air conditioning system are greatly increased, as shown in fig. 1 and fig. 2. The specific scheme is shown in figure 7.
Disclosure of Invention
In order to solve the problems, the invention provides an air heat and humidity treatment method and a unit of a primary return air conditioning system.
The technical scheme of the invention is as follows: the air heat and humidity treatment method of the primary return air conditioning system is characterized in that outdoor fresh air is treated by heat and humidity treatment equipment independently and then is mixed with indoor return air for the first time to reach an air supply state point and then is sent into a room.
The heat and humidity treatment equipment comprises several combinations of an air heater, a surface air cooler, a water spray chamber and an air humidifier.
In the air heat and humidity treatment method of the primary return air conditioning system, the air heater comprises a preheater and a reheater.
The air heat and humidity treatment unit of the primary return air conditioning system is provided with an outdoor fresh air inlet, a mixing section is arranged between the water spray chamber and the reheater II, an indoor return air inlet is arranged on the mixing section, and outdoor air is mixed with indoor return air in sequence after passing through the preheater and the water spray chamber to reach an air supply state point and is sent into a room through the reheater II.
Foretell return air conditioning system air heat and humidity processing unit, return air conditioning system air processing unit on be equipped with outdoor new trend entry, be equipped with the mixing section between reheater I and the reheater II, be equipped with indoor return air entry on the mixing section, outdoor new trend mixes once with indoor return air in the mixing section and reaches the air supply state point after preheater, spray chamber, reheater I in proper order, sends into indoorly through reheater II.
The air heat and humidity treatment process only carries out heat and humidity treatment on fresh air independently, does not carry out treatment on return air, the return air is used as a reheater, the mixing process of the fresh air and the return air is carried out after heat and humidity treatment equipment, namely the fresh air is treated independently, and the mixing point is an indoor air supply state point. The scheme is characterized in that the return air energy can be fully utilized, reheating is reduced or even cancelled, and the energy consumption of the existing one-time return air conditioning system of the whole air is greatly reduced.
In the invention, the fresh air can meet the requirements of cold (heat) load and wet load required indoors after being independently processed.
By adopting the method and the unit, the cold and heat loads of the air conditioning system are greatly reduced, and the investment and the operating cost of the corresponding air conditioning unit and the refrigeration and heat supply system are greatly reduced.
Drawings
Fig. 1 is a structural view of a conventional air conditioning system.
Fig. 2 shows a heat and humidity treatment scheme of a design working condition in summer of the existing primary return air (reheat) air conditioning system.
Fig. 3 is a schematic view of a primary return air conditioning system air handling unit according to embodiment 1 of the present invention.
Fig. 4 is a schematic view of an air heat and humidity treatment scheme of a primary return air conditioning system in an air summer design condition in embodiment 1 of the invention.
Fig. 5 is a schematic view of a primary return air conditioning system air handling unit of embodiment 2 of the present invention.
Fig. 6 is a schematic view of an air heat and humidity treatment scheme of a primary return air conditioning system in an air summer design condition in embodiment 2 of the invention.
FIG. 7 is a prior art primary return air conditioning system process scheme;
FIG. 8 shows the air heat and moisture treatment scheme of the present invention in summer design.
Fig. 9 shows a summer design of the present invention.
In the figure, 1-preheater, 2-water spray chamber, 3-reheater I, 4-mixing section, 5-reheater II, 6-outdoor fresh air inlet, 7-indoor return air inlet, 8-exhaust air, C-existing scheme fresh air and return air primary mixing point, L-existing scheme design machine dew point, L1-example 1 design machine dew point, L2-example 2 design machine dew point, L3-fresh air reheating state point, O-summer design air supply state point, N-indoor air summer design state point, W-outdoor air summer design state point, epsilon-design heat mixing ratio.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 3-4, an outdoor fresh air inlet 6 is arranged on the primary return air conditioning system air handling unit, a mixing section 4 is arranged between the spray chamber 2 and the reheater ii 5, an indoor return air inlet 7 is arranged on the mixing section 4, and the outdoor air is mixed with the indoor return air in sequence after passing through the preheater 1 and the spray chamber 2 to reach a designed air supply state point and is sent into the room through the reheater ii 5.
The summer design condition air heat and moisture treatment scheme is shown in fig. 8.
The air heat and humidity treatment method for the primary return air conditioning system under the design working condition in summer comprises the following steps: the preheater 1 and the reheater II 5 are closed, outdoor fresh air is cooled and dried by the water spray chamber 2 to reach the dew point L1 of the designed machine in the embodiment 1, and then is mixed with indoor return air in the mixing section 4 to reach the designed air supply state point O and is sent into the room.
As shown in fig. 5-6, an outdoor fresh air inlet 6 is arranged on the primary return air conditioning system air handling unit, a mixing section 4 is arranged between the reheater i 3 and the reheater ii 5, an indoor return air inlet 7 is arranged on the mixing section 4, and the outdoor fresh air is mixed with the indoor return air in the mixing section 4 to reach a designed air supply state point after sequentially passing through the preheater 1, the water spray chamber 2 and the reheater i 3, and is sent into a room through the reheater ii 5.
The summer design is shown in figure 9.
The air treatment method of the primary return air conditioning system comprises the following steps: the preheater 1 and the reheater II 5 are closed, outdoor fresh air is cooled and dried by the water spray chamber 2 to reach a designed machine dew point L2 in the embodiment 2, is reheated by the reheater I3 to reach a fresh air reheating state point L3, reaches a designed air supply state point O in the mixing section 4, and is sent into a room.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (5)
1. The air heat and humidity treatment method of the primary return air conditioning system is characterized in that outdoor fresh air is independently treated by heat and humidity treatment equipment and then is mixed with indoor return air for the first time to reach an air supply state point and then is sent into a room.
2. The method as claimed in claim 1, wherein the heat and moisture treatment apparatus comprises a combination of air heater, surface air cooler, water spray chamber, and air humidifier.
3. The method of claim 2, wherein the air heater comprises a preheater and a reheater.
4. The air heat and humidity treatment unit of the primary return air conditioning system is characterized in that an outdoor fresh air inlet (6) is formed in the air treatment unit of the primary return air conditioning system, a mixing section (4) is arranged between a water spray chamber (2) and a reheater II (5), an indoor return air inlet (7) is formed in the mixing section (4), and outdoor air sequentially passes through a preheater (1) and the water spray chamber (2) and then is mixed with indoor return air for one time to reach an air supply state point and is sent into a room through the reheater II (5).
5. The air heat and humidity processing unit of the primary return air conditioning system according to claim 4, wherein an outdoor fresh air inlet (6) is formed in the air processing unit of the primary return air conditioning system, a mixing section (4) is arranged between the reheater I (3) and the reheater II (5), an indoor return air inlet (7) is formed in the mixing section (4), the outdoor fresh air sequentially passes through the preheater (1), the water spray chamber (2) and the reheater I (3) and then is mixed with the indoor return air in the mixing section (4) for one time to reach an air supply state point, and the air is sent into a room through the reheater II (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110233441.6A CN112902325A (en) | 2021-03-03 | 2021-03-03 | Air heat and humidity treatment method and unit for primary return air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110233441.6A CN112902325A (en) | 2021-03-03 | 2021-03-03 | Air heat and humidity treatment method and unit for primary return air conditioning system |
Publications (1)
| Publication Number | Publication Date |
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| CN112902325A true CN112902325A (en) | 2021-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110233441.6A Pending CN112902325A (en) | 2021-03-03 | 2021-03-03 | Air heat and humidity treatment method and unit for primary return air conditioning system |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101603715A (en) * | 2009-07-07 | 2009-12-16 | 河南科技大学 | A kind of geothermal heat pump air-conditioning system and air-treatment method thereof |
| CN202303702U (en) * | 2011-10-27 | 2012-07-04 | 长沙有色冶金设计研究院有限公司 | System for separately treating fresh air in advance |
| CN103968454A (en) * | 2013-01-25 | 2014-08-06 | 肖才新 | Constant-temperature and constant-humidity clean air-conditioning energy saving system |
| CN204880557U (en) * | 2015-07-06 | 2015-12-16 | 上海电气开利能源工程有限公司 | Air treatment device |
| CN206583030U (en) * | 2017-01-23 | 2017-10-24 | 北京威斯汀豪斯科技有限公司 | A kind of full thermal purification VMC |
| US20170356661A1 (en) * | 2016-06-08 | 2017-12-14 | Semco Llc | Air conditioning with recovery wheel, passive dehumidification wheel, cooling coil, and secondary direct-expansion circuit |
| CN208901560U (en) * | 2018-09-20 | 2019-05-24 | 中国石化工程建设有限公司 | Constant temperature and humidity air-conditioning system |
| CN109945356A (en) * | 2019-01-30 | 2019-06-28 | 东南大学 | The remodeling method and device of cold source of air conditioning cascade utilization and accumulation of energy |
-
2021
- 2021-03-03 CN CN202110233441.6A patent/CN112902325A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101603715A (en) * | 2009-07-07 | 2009-12-16 | 河南科技大学 | A kind of geothermal heat pump air-conditioning system and air-treatment method thereof |
| CN202303702U (en) * | 2011-10-27 | 2012-07-04 | 长沙有色冶金设计研究院有限公司 | System for separately treating fresh air in advance |
| CN103968454A (en) * | 2013-01-25 | 2014-08-06 | 肖才新 | Constant-temperature and constant-humidity clean air-conditioning energy saving system |
| CN204880557U (en) * | 2015-07-06 | 2015-12-16 | 上海电气开利能源工程有限公司 | Air treatment device |
| US20170356661A1 (en) * | 2016-06-08 | 2017-12-14 | Semco Llc | Air conditioning with recovery wheel, passive dehumidification wheel, cooling coil, and secondary direct-expansion circuit |
| CN206583030U (en) * | 2017-01-23 | 2017-10-24 | 北京威斯汀豪斯科技有限公司 | A kind of full thermal purification VMC |
| CN208901560U (en) * | 2018-09-20 | 2019-05-24 | 中国石化工程建设有限公司 | Constant temperature and humidity air-conditioning system |
| CN109945356A (en) * | 2019-01-30 | 2019-06-28 | 东南大学 | The remodeling method and device of cold source of air conditioning cascade utilization and accumulation of energy |
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Application publication date: 20210604 |
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