CN107490121B - Fresh air unit - Google Patents
Fresh air unit Download PDFInfo
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- CN107490121B CN107490121B CN201710843634.7A CN201710843634A CN107490121B CN 107490121 B CN107490121 B CN 107490121B CN 201710843634 A CN201710843634 A CN 201710843634A CN 107490121 B CN107490121 B CN 107490121B
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- return
- box body
- heat
- fresh air
- area
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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
- F24F7/00—Ventilation
- F24F7/007—Ventilation with forced flow
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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
- F24F12/002—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an intermediate heat-transfer fluid
- F24F12/003—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an intermediate heat-transfer fluid using a heat pump
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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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]
- Y02B30/56—Heat recovery units
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Central Air Conditioning (AREA)
Abstract
The invention relates to an air conditioning technology, in particular to a high-efficiency low-cost energy recycling fresh air unit, which comprises an outdoor unit, a box body, a heat return device, a fresh air inlet, a fresh air outlet, a return air inlet and a return air outlet, wherein the box body is longitudinally divided into three parts, the left part of the box body is partitioned into a fresh air area and a return air area II, the middle part of the box body is partitioned into a mixed air area and a return air area I, the fresh air area is communicated with the mixed air area through a bypass valve I, the return air area I is communicated with the mixed air area through a bypass valve II, and the mixed air area is communicated with the right part of the box body through an indoor side fin heat exchanger; the unit is internally provided with a heat return device, the heat return device is positioned at the junction of the left part and the middle part of the box body, the heat absorption end of the heat return device is positioned at the fresh air area side, and the heat release end of the heat return device is positioned at the return air area II side; the outdoor unit comprises an outdoor side fin heat exchanger, an outdoor exhaust fan, a compressor and a heat recovery compressor.
Description
Technical Field
The invention relates to an air conditioning technology, in particular to a fresh air handling unit with high efficiency, low cost and energy recycling.
Background
The fresh air handling unit is an air conditioning device for providing fresh air, and is used for handling the outdoor fresh air and then sending the treated fresh air into a room, so that the constant temperature and constant humidity adjustment can be realized. The existing fresh air treatment equipment has high air humidity, the air conditioning unit needs additional humidity control, and the energy consumption is high.
Disclosure of Invention
In order to solve the problems, the invention provides the fresh air handling unit, which has the advantages of capability of reutilizing the unit waste heat, small volume and high efficiency, and can save cost without defrosting.
The technical scheme adopted by the invention is as follows:
a fresh air unit comprises an outdoor unit, a box body, a heat return device, a fresh air inlet, a fresh air outlet, a return air inlet and a return air outlet, wherein the box body is longitudinally divided into three parts,
the left part of the box body is partitioned into a fresh air area and a return air area II, the middle part of the box body is partitioned into a mixed air area and a return air area I, the fresh air area is communicated with the mixed air area through a bypass valve I, the return air area I is communicated with the mixed air area through a bypass valve II, and the mixed air area is communicated with the right part of the box body through an indoor side fin heat exchanger;
the fresh air inlet is arranged in front of the left part of the box body;
the fresh air outlet is arranged on the side surface of the right part of the box body, and an indoor blower is arranged in the right part of the box body and right opposite to the fresh air outlet;
the return air inlet is arranged at the rear of the middle part of the box body;
the air return outlet is arranged at the rear of the left part of the box body, and an indoor exhaust fan is arranged at the position, opposite to the air return outlet, of the air return area II in the box body;
the heat return device is arranged at the junction of the left part and the middle part of the box body, the heat absorption end of the heat return device is arranged at the side of the fresh air area, and the heat release end of the heat return device is arranged at the side of the return air area II;
the outdoor unit comprises an outdoor side fin heat exchanger, an outdoor exhaust fan, a compressor and a heat recovery compressor.
Above-mentioned fresh air unit, be equipped with the heat recovery heat exchanger that is used for further absorbing return air heat in the return air district II, the heat recovery heat exchanger sets up between heat recovery ware and indoor exhaust fan.
And the included angle between the bypass valve II and the inlet direction of the return air is 45-55 degrees.
The beneficial effects of the invention are as follows:
1. the distance between the fresh air inlet and the fresh air outlet is increased, and the fresh air temperature and humidity are controlled more easily in multiple stages through two-stage treatment of the heat return device and the fin heat exchanger, so that the return air distance is shortened, and the speed and heat recovery are ensured.
2. The return air is often high in temperature after being treated by the heat recovery device, the heat recovery heat exchanger can recover the redundant heat in the return air again for the heat pump to be reused, so that the energy is greatly saved, the working efficiency is improved, and the cost is reduced,
3. The box body is arranged in a modular way, so that the unit volume is greatly reduced, and the total weight, pipelines and occupied space are reduced.
Drawings
FIG. 1 is a schematic view of the present invention in a front view;
FIG. 2 is a schematic diagram illustrating the working principle of the present invention in a top view;
in the figure: 1 is a fresh air inlet, 2 is a fresh air outlet, 3 is a return air inlet, 4 is a return air outlet, 5 is a heat recovery heat exchanger, 6 is a heat recovery device, 7 is a bypass valve I, 8 is a bypass valve II, 9 is an indoor side fin heat exchanger, 10 is a box body, 11 is an indoor blower, 12 is an indoor exhaust fan, 13 is an outdoor side fin heat exchanger, 14 is an outdoor exhaust fan, 15 is a compressor, and 16 is a compressor for heat recovery;
a is a fresh air area, B is a mixed air area, C is a return air area I, and D is a return air area II.
Detailed Description
The invention is further explained below with reference to the drawings.
The invention relates to a fresh air unit, which comprises an outdoor unit, a box body 10, a heat return device 6, a fresh air inlet 1, a fresh air outlet 2, a return air inlet 3 and a return air outlet 4, wherein the interior of the box body 10 is longitudinally divided into three parts,
the left part of the box body 10 is partitioned into a fresh air area and a return air area II, the middle part of the box body 10 is partitioned into a mixed air area and a return air area I, the fresh air area is communicated with the mixed air area through a bypass valve I7, the return air area I is communicated with the mixed air area through a bypass valve II, and the mixed air area is communicated with the right part of the box body 10 through an indoor side fin heat exchanger 9;
the fresh air inlet 1 is arranged in front of the left part of the box body 10;
the fresh air outlet 2 is arranged on the side surface of the right part of the box body 10, and an indoor blower 11 is arranged in the right part of the box body 10 and right opposite to the fresh air outlet 2;
the return air inlet 3 is arranged at the rear of the middle part of the box body 10;
the return air outlet 4 is arranged at the rear of the left part of the box body 10, and an indoor exhaust fan 12 is arranged at the position of the return air area II in the box body 10, which is opposite to the return air outlet 4;
the heat return device 6 is arranged at the junction of the left part and the middle part of the box body 10, the heat absorption end of the heat return device 6 is arranged at the side of the fresh air area, and the heat release end is arranged at the side of the return air area II;
the outdoor unit includes an outdoor side fin heat exchanger 13, an outdoor exhaust fan 14, a compressor 15, and a heat recovery compressor 16.
Above-mentioned fresh air unit, be equipped with the heat recovery heat exchanger 5 that is used for further absorbing return air heat in the return air district II, heat recovery heat exchanger 5 sets up between heat recovery 6 and indoor exhaust fan 12.
And the included angle between the bypass valve II 8 and the inlet direction of the return air is 45-55 degrees.
The working principles of the present embodiment in summer and winter are:
under the operating conditions of a hotel with outdoor 37 ℃ and indoor 27 ℃ and 50% fresh air quantity in summer, the outdoor high-temperature fresh air inlet temperature is 37 ℃, fresh air enters a fresh air zone A through a fresh air inlet 1, then is cooled to 31 ℃ through a bypass valve I7 and a heat return device 6, and enters a mixed air zone B. Meanwhile, the indoor return air at 27 ℃ is divided into two paths of air flows through the return air inlet 3: one path enters the air mixing area B through the bypass valve II 8 to be mixed with fresh air, then reaches the indoor side fin heat exchanger 9 to be cooled and dehumidified, and is sent into a room; the other path of return air with the temperature of 27 ℃ is heated to 33 ℃ through the heat return device 6, enters the fin type heat exchanger 5 to be used as a condenser of the heat recovery compressor 16, and the heat recovery compressor 16 is throttled after being condensed by the outdoor side fin type heat exchanger 13 to be used for cooling and dehumidifying the indoor side fin type heat exchanger 9. The heat recovery rate of the heat recovery device 6 in normal use is generally less than 60%, 40% of the heat recovery device cannot be recovered, 100% recovery can be realized through the outdoor side fin heat exchanger 13, the condensation temperature of the heat recovery compressor 16 can be lower than that of the compressor 15 by more than 4 ℃, the power is lower than that of the compressor by more than 10%, the refrigerating capacity is improved by more than 5%, and the comprehensive energy conservation is improved by 15%; the heat recovery compressor 16 can save 8% of energy by using the power of the indoor exhaust fan 12 without using the power of the outdoor exhaust fan 14 but using the power of the indoor exhaust fan 12 "free; the comprehensive energy saving is more than 24%. The free use of the indoor exhaust fan 12 also reduces the volume of the unit, thereby further reducing costs. The larger the fresh air quantity is, the more obvious the energy-saving effect and the cost saving are.
Under the operating conditions of a hotel with outdoor 7 ℃ and indoor 21 ℃ and 50% fresh air quantity in winter, the outdoor low temperature is 7 ℃ at the fresh air inlet 1, and the temperature is raised to 15.5 ℃ through the bypass valve I7 and the heat return device 6, and enters the air mixing area B. Meanwhile, indoor return air at 21 ℃ is divided into two paths of air flows through a return air inlet 3: one path enters a wind mixing area B through a bypass valve II 8 to be mixed with fresh air, enters an indoor fin type heat exchanger 9 to be subjected to temperature rising treatment and then is sent into a room; the other path of the return air at the temperature of 21 ℃ enters the return air zone I, is cooled to 12.5 ℃ through the heat return device 6, enters the heat recovery heat exchanger 5 and serves as an evaporator of the heat recovery compressor 16, and the heat recovery compressor 16 absorbs the heat of the heat recovery heat exchanger 5 and supplies heat to the indoor fin heat exchanger 9. The heat recovery rate of the heat recovery device 6 is generally less than 60%, the heat recovery device can not recover 40%, 100% recovery can be realized through the fin type heat exchanger 5, the evaporation temperature of the heat recovery compressor 16 can be increased by more than 3 ℃ compared with that of the heat recovery compressor 15, the heating capacity is increased by more than 10%, and the comprehensive energy saving is improved by 10%; the compressor 16 for heat recovery does not need the power of the outdoor exhaust fan 14, basically uses the power of the indoor exhaust fan 12 without charge, and can save energy by 8%; the comprehensive energy saving is more than 18 percent. Since the temperature of the exhaust air after the heat recovery can be controlled to be higher than 7 degrees, the heat recovery compressor 16 does not have a defrosting need, the system stability can be improved, and the fluctuation of the indoor temperature can be reduced.
Claims (1)
1. A fresh air handling unit, characterized in that: comprises an outdoor unit, a box body (10), a heat return device (6), a fresh air inlet (1), a fresh air outlet (2), a return air inlet (3) and a return air outlet (4), wherein the interior of the box body (10) is longitudinally divided into three parts,
the left part of the box body (10) is partitioned into a fresh air area and a return air area II, the middle part of the box body (10) is partitioned into a mixed air area and a return air area I, the fresh air area is communicated with the mixed air area through a bypass valve I (7), the return air area I is communicated with the mixed air area through a bypass valve II, and the mixed air area is communicated with the right part of the box body (10) through an indoor side fin heat exchanger (9);
the fresh air inlet (1) is arranged in front of the left part of the box body (10);
the fresh air outlet (2) is arranged on the side surface of the right part of the box body (10), and an indoor blower (11) is arranged in the right part of the box body (10) and is opposite to the fresh air outlet (2);
the return air inlet (3) is arranged at the rear part of the middle part of the box body (10);
the air return outlet (4) is arranged at the rear of the left part of the box body (10), and an indoor exhaust fan (12) is arranged at the position, opposite to the air return outlet (4), of the air return area II in the box body (10);
the heat return device (6) is arranged at the junction of the left part and the middle part of the box body (10), the heat absorption end of the heat return device (6) is arranged at the side of the fresh air area, and the heat release end is arranged at the side of the return air area II;
the outdoor unit comprises an outdoor side fin heat exchanger (13), an outdoor exhaust fan (14), a compressor (15) and a heat recovery compressor (16); a heat recovery heat exchanger (5) for further absorbing return air heat is arranged in the return air zone II, and the heat recovery heat exchanger (5) is arranged between the heat recovery device (6) and the indoor exhaust fan (12); the included angle between the bypass valve II (8) and the entering direction of the return air is 45-55 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710843634.7A CN107490121B (en) | 2017-09-19 | 2017-09-19 | Fresh air unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710843634.7A CN107490121B (en) | 2017-09-19 | 2017-09-19 | Fresh air unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107490121A CN107490121A (en) | 2017-12-19 |
| CN107490121B true CN107490121B (en) | 2023-05-09 |
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ID=60652823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710843634.7A Active CN107490121B (en) | 2017-09-19 | 2017-09-19 | Fresh air unit |
Country Status (1)
| Country | Link |
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| CN (1) | CN107490121B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101672512A (en) * | 2008-09-11 | 2010-03-17 | 同方人工环境有限公司 | Heat recovery fresh air unit with distributed cold and heat source |
| WO2013131436A1 (en) * | 2012-03-05 | 2013-09-12 | Rong Guohua | Air-conditioning unit with heat recovery |
| CN203336708U (en) * | 2013-05-21 | 2013-12-11 | 青岛宏宇环保空调设备有限公司 | Direct-expansion type double-effect heat recovery heat pump air-conditioner system |
| CN104976706A (en) * | 2014-04-08 | 2015-10-14 | 上海诺佛尔建筑科技发展有限公司 | Fresh air treatment device with secondary heat recovery function |
| CN105571017A (en) * | 2014-10-17 | 2016-05-11 | 浙江盾安机电科技有限公司 | Fresh air processing unit |
| CN105674444A (en) * | 2016-03-31 | 2016-06-15 | 中国建筑科学研究院 | Heat recovery fresh air ventilation air conditioning purification unit |
| CN106196380A (en) * | 2016-08-31 | 2016-12-07 | 山东华科规划建筑设计有限公司 | A kind of cold-producing medium heat of subcooling recycling recuperation of heat air-treatment unit |
| CN206113169U (en) * | 2016-08-27 | 2017-04-19 | 泰豪科技股份有限公司 | Take brand -new wind low temperature dehumidifier of heat recovery |
-
2017
- 2017-09-19 CN CN201710843634.7A patent/CN107490121B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101672512A (en) * | 2008-09-11 | 2010-03-17 | 同方人工环境有限公司 | Heat recovery fresh air unit with distributed cold and heat source |
| WO2013131436A1 (en) * | 2012-03-05 | 2013-09-12 | Rong Guohua | Air-conditioning unit with heat recovery |
| CN203336708U (en) * | 2013-05-21 | 2013-12-11 | 青岛宏宇环保空调设备有限公司 | Direct-expansion type double-effect heat recovery heat pump air-conditioner system |
| CN104976706A (en) * | 2014-04-08 | 2015-10-14 | 上海诺佛尔建筑科技发展有限公司 | Fresh air treatment device with secondary heat recovery function |
| CN105571017A (en) * | 2014-10-17 | 2016-05-11 | 浙江盾安机电科技有限公司 | Fresh air processing unit |
| CN105674444A (en) * | 2016-03-31 | 2016-06-15 | 中国建筑科学研究院 | Heat recovery fresh air ventilation air conditioning purification unit |
| CN206113169U (en) * | 2016-08-27 | 2017-04-19 | 泰豪科技股份有限公司 | Take brand -new wind low temperature dehumidifier of heat recovery |
| CN106196380A (en) * | 2016-08-31 | 2016-12-07 | 山东华科规划建筑设计有限公司 | A kind of cold-producing medium heat of subcooling recycling recuperation of heat air-treatment unit |
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| Publication number | Publication date |
|---|---|
| CN107490121A (en) | 2017-12-19 |
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Address after: 253000 area a, workshop 2 in the courtyard of Shandong Yineng Boiler Co., Ltd., 50m south of the intersection of Tianqu East Road and Chongde 10th Avenue, Yuanqiao Town, economic and Technological Development Zone, De Zhou City, Shandong Province Applicant after: Shandong Kaifeng Energy Saving Technology Co.,Ltd. Address before: 253000 No. 4188, Dongfanghong Road, Dezhou Economic Development Zone, Shandong Province Applicant before: SHANDONG KAIFENG ENERGY SAVING TECHNOLOGY CO.,LTD. |
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