CN108443995A - A kind of efficient heat-recycling fresh air regenerating device of three-dimensional structure changes - Google Patents
A kind of efficient heat-recycling fresh air regenerating device of three-dimensional structure changes Download PDFInfo
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- CN108443995A CN108443995A CN201810084482.1A CN201810084482A CN108443995A CN 108443995 A CN108443995 A CN 108443995A CN 201810084482 A CN201810084482 A CN 201810084482A CN 108443995 A CN108443995 A CN 108443995A
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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
- F24F3/06—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 arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
- F24F3/08—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 arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with separate supply and return lines for hot and cold heat-exchange fluids i.e. so-called "4-conduit" system
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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
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
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Abstract
本发明公开了一种三维变结构高效热回收新风换气装置，包括三维变结构高效热回收器、新风风机、排风风机、粗效过滤器、空气净化装置、CO2传感器和控制模块，室外新风经粗效过滤器、空气净化装置处理后，跟室内排风在三维变结构高效热回收器内换热，再经新风风机加压，送入房间内，室内排风经粗效过滤器，跟室外新风在三维变结构高效热回收器内换热后，由排风风机排出室外。本发明的优点是：结构紧凑、体积小，特别适合安装高度紧张的建筑物；采用三维变结构高效热回收器，实现新、排风之间的高效热回收，从而达到节能的目的；通过CO2传感器可探测室内CO2浓度，再通过控制模块指导新、排风机变频，保持室内CO2浓度在卫生许可的浓度范围内。
The invention discloses a three-dimensional variable structure high-efficiency heat recovery fresh air ventilation device, comprising a three-dimensional variable structure high-efficiency heat recovery device, a fresh air fan, an exhaust fan, a coarse-effect filter, an air purification device, a CO2 sensor and a control module. After the fresh air is treated by the coarse-effect filter and the air purification device, it exchanges heat with the indoor exhaust air in the three-dimensional variable-structure high-efficiency heat recovery device, and then is pressurized by the fresh air fan and sent into the room. The indoor exhaust air passes through the coarse-effect filter, After exchanging heat with the outdoor fresh air in the three-dimensional variable structure high-efficiency heat recovery device, it is discharged outside by the exhaust fan. The advantages of the present invention are: compact structure, small volume, especially suitable for installing high-tension buildings; adopting a three-dimensional variable structure high-efficiency heat recovery device to realize high-efficiency heat recovery between ventilation and exhaust, thereby achieving the purpose of energy saving; through CO 2 The sensor can detect the indoor CO 2 concentration, and then through the control module to guide the frequency conversion of the new and exhaust fans, keep the indoor CO 2 concentration within the concentration range of the hygienic permit.
Description
技术领域technical field
本发明涉及建筑和环保技术领域，具体涉及一种三维变结构高效热回收新风换气装置。The invention relates to the technical fields of construction and environmental protection, in particular to a three-dimensional variable structure high-efficiency heat recovery fresh air ventilation device.
背景技术Background technique
随着社会经济水平的提高，人们更加追求对美好生活的向往，也更加关注人居环境的健康程度。室内空气品质的好坏，对人们的生活和健康有很大影响，特别是近年来，大气污染加剧，导致人们赖以生存的空气受到污染，因此，很有必要对送入室内的新风进行过滤、净化处理，同时，对室内污染物浓度(比如：CO2)进行控制，以满足人们的卫生和身体健康需求。With the improvement of social and economic level, people are more pursuing yearning for a better life, and pay more attention to the health of the living environment. The quality of indoor air has a great impact on people's life and health. Especially in recent years, the air pollution has intensified, resulting in the pollution of the air that people live on. Therefore, it is necessary to filter the fresh air sent into the room. , purification treatment, and at the same time, control the concentration of indoor pollutants (such as: CO 2 ) to meet people's hygiene and physical health needs.
随着人们生活水平的提高，建筑能耗也急剧上升。据统计，我国建筑能耗约占全国能源消费总量的20％，若加上建筑建造能耗，则整个建筑领域的建造和运行能耗占全社会一次能耗总量比例高达36％。因此，建筑节能显得尤为重要。对室外新风进行处理，以达到室内温湿度要求，能耗很大，约占空调能耗的20-30％，因此，利用建筑排风对室外新风进行预冷/预热处理，可节约能源，达到很好的节能效果。With the improvement of people's living standards, building energy consumption has also risen sharply. According to statistics, my country's building energy consumption accounts for about 20% of the country's total energy consumption. If the energy consumption of building construction is added, the construction and operation energy consumption of the entire building field accounts for as much as 36% of the total primary energy consumption of the whole society. Therefore, building energy efficiency is particularly important. Processing outdoor fresh air to meet indoor temperature and humidity requirements consumes a lot of energy, accounting for about 20-30% of air-conditioning energy consumption. Therefore, using building exhaust to pre-cool/preheat outdoor fresh air can save energy. To achieve a good energy-saving effect.
目前的新风预处理装置主要分为两种，一种是全热回收装置，另一种是显热回收装置。前者热回收效率相对较高，但是，存在新、排风交叉污染的风险；后者主要是采用汊流换热为主的热交换方式，尽管能避免新、排风交叉污染的危险，但是，热回收效率相对较低。The current fresh air pretreatment device is mainly divided into two types, one is a total heat recovery device, and the other is a sensible heat recovery device. The heat recovery efficiency of the former is relatively high, but there is a risk of cross-contamination of fresh air and exhaust air; the latter mainly adopts a heat exchange method based on branch flow heat exchange. Although it can avoid the risk of cross-contamination of fresh air and exhaust air, Heat recovery efficiency is relatively low.
发明内容Contents of the invention
针对上述问题，本发明提供一种三维变结构高效热回收新风换气装置，采用三维变结构高效强化传热管，并利用顺紊流传热原理和非对称传热空间设计技术，能有效解决室内空气品质的问题，同时，节省建筑能耗。In view of the above problems, the present invention provides a three-dimensional variable structure high-efficiency heat recovery fresh air ventilation device, which adopts a three-dimensional variable structure high-efficiency enhanced heat transfer tube, and utilizes the principle of turbulent heat transfer and asymmetric heat transfer space design technology, which can effectively solve indoor Air quality issues, at the same time, saving building energy consumption.
为实现上述目的，本发明所采用的技术方案是：To achieve the above object, the technical solution adopted in the present invention is:
一种三维变结构高效热回收新风换气装置，具有新风侧、排风侧和控制侧，所述新风侧包括依次设置的新风入口、粗效过滤器、空气净化处理装置、三维变结构高效热回收器的新风进风口、三维变结构高效热回收器的新风侧通道、三维变结构高效热回收器的新风出风口、新风风机以及新风出口；所述排风侧包括依次设置的排风入口、粗效过滤器、三维变结构高效热回收器的排风进风口、三维变结构高效热回收器的排风侧通道、三维变结构高效热回收器的排风出风口、排风风机以及排风出口；所述控制侧包括控制模块和CO2传感器，所述新风风机、排风风机和CO2传感器均与控制模块通讯连接。A three-dimensional variable structure high-efficiency heat recovery fresh air ventilation device has a fresh air side, an exhaust side and a control side. The fresh air inlet of the recoverer, the fresh air side channel of the three-dimensional variable structure high-efficiency heat recovery device, the fresh air outlet, the fresh air fan and the fresh air outlet of the three-dimensional variable structure high-efficiency heat recovery device; Coarse effect filter, exhaust air inlet of three-dimensional variable structure high-efficiency heat recovery device, exhaust side channel of three-dimensional variable structure high-efficiency heat recovery device, exhaust air outlet of three-dimensional variable structure high-efficiency heat recovery device, exhaust fan and exhaust air Outlet; the control side includes a control module and a CO 2 sensor, and the fresh air fan, exhaust fan and CO 2 sensor are all communicated with the control module.
本发明的三维变结构高效热回收新风换气装置，通过粗效过滤器和空气净化处理装置，可对室外新风中的灰尘和污染物进行净化，达到保证室外新风品质的目的；空气净化处理装置，也可以根据特定场合的不同需求，对室外空气进行净化，以达到清除室外污染空气中的特定污染物；根据探测室内排风CO2的浓度，及时调节新风、排风风机的电机频率，控制新、排风量，将室内CO2浓度控制在卫生许可的浓度范围内，从而达到保证室内空气品质满足卫生要求的目的。The three-dimensional variable structure high-efficiency heat recovery fresh air ventilation device of the present invention can purify the dust and pollutants in the outdoor fresh air through the coarse-effect filter and the air purification treatment device, so as to achieve the purpose of ensuring the quality of the outdoor fresh air; the air purification treatment device According to the different needs of specific occasions, the outdoor air can also be purified to remove specific pollutants in the outdoor polluted air; according to the detection of the concentration of CO 2 in the indoor exhaust air, the motor frequency of the fresh air and exhaust fans can be adjusted in time to control New, exhaust air volume, control the indoor CO2 concentration within the concentration range of the hygienic permit, so as to achieve the purpose of ensuring the indoor air quality to meet the hygienic requirements.
进一步地，所述三维变结构高效热回收器设有三维变结构管束，所述三维变结构管束由多个三维变结构管排列组合而成，所述的各三维变结构管之间具有间隙，构成供新风流通的新风侧通道，所述的各三维变结构管管腔构成供排风流通的排风侧通道。新风和排风通过三维变结构管束的内、外通道进行间壁换热，新风与排风之间不接触，从而避免新、排风之间的直接污染。Further, the three-dimensional variable structure high-efficiency heat recovery device is provided with a three-dimensional variable structure tube bundle, and the three-dimensional variable structure tube bundle is formed by arranging and combining a plurality of three-dimensional variable structure tubes, and there are gaps between the three-dimensional variable structure tubes, A fresh air side passage for fresh air circulation is formed, and the lumens of the three-dimensional variable structure tubes form an exhaust air side passage for exhaust air circulation. The fresh air and the exhaust air exchange heat through the inner and outer channels of the three-dimensional variable structure tube bundle, and there is no contact between the fresh air and the exhaust air, thereby avoiding direct pollution between the fresh air and the exhaust air.
进一步地，所述三维变结构管由椭圆管经螺旋扭曲而成，新风和排风之间可形成顺紊流流动强化传热，较之传统的汊流换热器，其换热效果更好，可大大提高热回收效率；各三维变结构管在最大变径凸点处相互接触形成自支撑结构，可避免因风速过大所产生的震动和噪声。Further, the three-dimensional variable structure tube is formed by spiral twisting of an elliptical tube, and a turbulent flow can be formed between the fresh air and the exhaust air to enhance heat transfer. Compared with the traditional branch flow heat exchanger, the heat transfer effect is better , which can greatly improve the heat recovery efficiency; the three-dimensional variable structure tubes contact each other at the largest variable diameter bump to form a self-supporting structure, which can avoid vibration and noise caused by excessive wind speed.
进一步地，所述控制侧还包括设置在粗效过滤器和空气净化处理装置上的压差传感器，各压差传感器均与控制模块通讯连接。控制模块通过检测粗效过滤器和空气净化装置两端的压差，当压差超过设定值时，可提示需更换或清洗，以降低风阻。Further, the control side also includes differential pressure sensors arranged on the rough filter and the air purification treatment device, and each differential pressure sensor is in communication connection with the control module. The control module detects the pressure difference between the coarse-effect filter and the air purification device. When the pressure difference exceeds the set value, it can prompt replacement or cleaning to reduce wind resistance.
进一步地，所述控制模块还具有远程通讯接口，可与楼宇自控系统远程连接，使控制模块具有就地控制和远程控制功能。Further, the control module also has a remote communication interface, which can be remotely connected with the building automation system, so that the control module has local control and remote control functions.
本发明与现有技术相比，其有益效果在于：Compared with the prior art, the present invention has the beneficial effects of:
1、本发明采用三维变结构高效热回收器，其结构紧凑、体积小，安装高度要求相对较小，有利于提高建筑内部吊顶下的净高，特别适合于安装空间紧张的建筑物。1. The present invention adopts a three-dimensional variable structure high-efficiency heat recovery device, which has a compact structure, small volume, and relatively small installation height requirements, which is conducive to improving the net height under the suspended ceiling inside the building, and is especially suitable for buildings with tight installation space.
2、本发明采用三维变结构高效热回收器，采用顺紊流传热方式，在冷热流道中产生的离心力有利于产生二次流，使得空气热边界层变薄，降低传热热阻，较之传统产品的汊流传热方式，其传热效率高。对于同样的传热量或效率，本发明可减少传热面积，从而降低造价，节约成本。2. The present invention adopts a three-dimensional variable structure high-efficiency heat recovery device, and adopts a turbulent heat transfer method. The centrifugal force generated in the hot and cold runners is conducive to the generation of secondary flow, which makes the air thermal boundary layer thinner and reduces the heat transfer resistance. The branched heat transfer method of traditional products has high heat transfer efficiency. For the same heat transfer or efficiency, the invention can reduce the heat transfer area, thereby reducing the cost and saving the cost.
3、本发明可根据室内CO2浓度，及时变频调节新、排风量，将室内CO2浓度控制在卫生许可的浓度范围内，保证室内空气品质的同时，降低运行成本，以节能。3. According to the indoor CO 2 concentration, the present invention can adjust the ventilation and exhaust air volume by frequency conversion in time, and control the indoor CO 2 concentration within the sanitation permitted concentration range to ensure indoor air quality while reducing operating costs and saving energy.
4、本发明自成一套完整的控制系统，可实现就地控制，也可接入楼宇自控系统，实现远程监控。4. The present invention forms a complete set of control system, which can realize local control, and can also be connected to the building automatic control system to realize remote monitoring.
附图说明Description of drawings
图1是本发明装置的俯视平面示意图；Fig. 1 is the top plan view schematic diagram of device of the present invention;
图2是本发明装置的主视平面示意图；Fig. 2 is the front plane schematic diagram of device of the present invention;
图3是本发明三维变结构管束的结构示意图Fig. 3 is the structural representation of three-dimensional variable structure tube bundle of the present invention
附图标记说明：1-三维变结构高效热回收器；2-新风风机；3-排风风机；4-粗效过滤器；5-空气净化装置；6-控制模块；7-CO2传感器；8-新风入口；9-新风出口；10-排风入口；11-排风进风口；12-排风出风口；13-新风进风口；14-新风出风口；15-排风出口；16-三维变结构管束；17-三维变结构管。Description of reference signs: 1-three-dimensional variable structure high-efficiency heat recovery device; 2-fresh air fan; 3-exhaust fan; 4-coarse effect filter; 5-air purification device; 6-control module; 7-CO 2 sensor; 8-fresh air inlet; 9-fresh air outlet; 10-exhaust air inlet; 11-exhaust air inlet; 12-exhaust air outlet; 13-fresh air inlet; 14-fresh air outlet; 15-exhaust air outlet; 16- Three-dimensional variable structure tube bundle; 17-three-dimensional variable structure tube.
具体实施方式Detailed ways
为使本发明的目的、技术方案及效果更加清楚、明确，以下参照附图并举实例对本发明进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本发明。附图仅用于示例性说明，不能理解为对本专利的限制；为了更好说明本实施例，附图某些部件会有省略、放大或缩小，并不代表实际产品的尺寸；对于本领域技术人员来说，附图中某些公知结构及其说明可能省略是可以理解的。附图中描述位置关系仅用于示例性说明，不能理解为对本专利的限制。In order to make the object, technical solution and effect of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. The accompanying drawings are for illustrative purposes only, and should not be construed as limitations on this patent; in order to better illustrate this embodiment, certain components in the accompanying drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art It is understandable that some well-known structures and descriptions thereof may be omitted in the drawings. The positional relationship described in the drawings is for illustrative purposes only, and should not be construed as a limitation on this patent.
实施例：Example:
如图1至图3所示，一种三维变结构高效热回收新风换气装置，包括三维变结构高效热回收器1、新风风机2、排风风机3、两个粗效过滤器4、空气净化装置5、控制模块6、CO2传感器7、以及设置在粗效过滤器4和空气净化装置5上的压差传感器，整个装置可分为新风侧、排风侧和控制侧三部分。As shown in Figures 1 to 3, a three-dimensional variable structure high-efficiency heat recovery fresh air ventilation device includes a three-dimensional variable structure high-efficiency heat recovery device 1, a fresh air fan 2, an exhaust fan 3, two coarse filters 4, an air The purification device 5, the control module 6, the CO sensor 7, and the differential pressure sensor provided on the coarse filter 4 and the air purification device 5, the whole device can be divided into three parts: the fresh air side, the exhaust air side and the control side.
室外新风经新风百叶、新风管道进入本装置的新风入口8，经过粗效过滤器4和空气净化装置5处理后，通过三维变结构高效热回收器1的新风进风口13进入三维变结构高效热回收器1，与室内排风换热，再由三维变结构高效热回收器1的新风出风口14排出，经新风风机2加压，由新风出口9送入房间内，通过与房间内新风管上的新风口，均匀地送入房间。The outdoor fresh air enters the fresh air inlet 8 of the device through the fresh air louvers and the fresh air pipe, and after being treated by the coarse-effect filter 4 and the air purification device 5, enters the three-dimensional variable structure high-efficiency heat recovery device 1 through the fresh air inlet 13 of the three-dimensional variable structure high-efficiency heat recovery unit 1. The recoverer 1 exchanges heat with the indoor exhaust air, and then is discharged from the fresh air outlet 14 of the three-dimensional variable structure high-efficiency heat recovery device 1. After being pressurized by the fresh air fan 2, it is sent into the room by the fresh air outlet 9, and passes through the fresh air in the room. The fresh air outlet on the pipe evenly sends it into the room.
室内排风经排风管上的排风口收集后，由排风入口10进入本装置，经过粗效过滤器4过滤，通过三维变结构高效热回收器1的排风进风口11进入三维变结构高效热回收器1，与室外新风换热，再由三维变结构高效热回收器1的排风出口12排出，由排风风机3经排风出口15、排风管道、排风百叶排出室外。After the indoor exhaust air is collected by the exhaust outlet on the exhaust pipe, it enters the device from the exhaust inlet 10, is filtered by the coarse-effect filter 4, and enters the three-dimensional variable structure through the exhaust air inlet 11 of the high-efficiency heat recovery device 1 of the three-dimensional variable structure. The structurally efficient heat recovery device 1 exchanges heat with outdoor fresh air, and then is discharged from the exhaust outlet 12 of the three-dimensional variable-structure high-efficiency heat recovery device 1, and is discharged outdoors by the exhaust fan 3 through the exhaust outlet 15, exhaust duct, and exhaust louvers .
通过设置在本装置的CO2传感器7可探测探测室内CO2浓度，当室内CO2浓度超过1000ppm，通过控制模块6指导新风风机2、排风风机3的电机变频，加大新、排风量，快速降低室内CO2浓度；当室内CO2浓度低于300ppm，通过控制模块6指导新风风机2、排风风机3的电机变频，减少新、排风量，从而节约风机运行能耗。The indoor CO2 concentration can be detected by the CO2 sensor 7 installed in the device. When the indoor CO2 concentration exceeds 1000ppm, the control module 6 guides the frequency conversion of the motors of the fresh air fan 2 and the exhaust fan 3 to increase the fresh air and exhaust air volume. , quickly reduce the indoor CO2 concentration; when the indoor CO2 concentration is lower than 300ppm, the control module 6 guides the frequency conversion of the motors of the fresh air fan 2 and exhaust fan 3 to reduce the fresh air and exhaust air volume, thereby saving the energy consumption of the fans.
三维变结构高效热回收器1内的换热部件为三维变结构管束16，其由多个三维变结构管17排列组合而成，三维变结构管17由椭圆管经螺旋扭曲而成，各三维变结构管17在最大变径凸点处相互接触形成自支撑结构，一方面构成供新风流通的新风侧通道，另一方面可避免因风速过大所产生的震动和噪声，三维变结构管17用绑带进行固定，制作简易。三维变结构管17的管腔则构成供排风流通的排风侧通道，新风和排风通过三维变结构管束16的内、外通道进行间壁换热，新风与排风之间不接触，既可避免新、排风之间的直接污染，又因三维变结构管17的特殊构造，新风和排风之间可形成顺紊流流动强化传热，较之传统的汊流换热器，其换热效果更好，可大大提高热回收效率。三维变结构管17为铝质换热管，重量轻，可减轻整个装置的重量。The heat exchange component in the three-dimensional variable structure high-efficiency heat recovery device 1 is a three-dimensional variable structure tube bundle 16, which is formed by arranging and combining a plurality of three-dimensional variable structure tubes 17. The variable structure tube 17 contacts with each other at the maximum variable diameter bump to form a self-supporting structure. On the one hand, it forms a fresh air side channel for the fresh air to circulate, and on the other hand, it can avoid vibration and noise caused by excessive wind speed. The three-dimensional variable structure tube 17 Fastened with straps, easy to make. The lumen of the three-dimensional variable structure tube 17 constitutes the exhaust side channel for the exhaust air to flow through. The fresh air and exhaust air pass through the inner and outer channels of the three-dimensional variable structure tube bundle 16 for heat exchange between the partition walls. There is no contact between the fresh air and the exhaust air. It can avoid direct pollution between the fresh air and the exhaust air, and because of the special structure of the three-dimensional variable structure tube 17, a turbulent flow can be formed between the fresh air and the exhaust air to enhance heat transfer. Compared with the traditional branch flow heat exchanger, its The heat exchange effect is better, which can greatly improve the heat recovery efficiency. The three-dimensional variable structure tube 17 is an aluminum heat exchange tube, which is light in weight and can reduce the weight of the whole device.
控制模块6还可检测粗效过滤器4和空气净化装置5两端的压差，当压差超过设定值时，可提示需更换或清洗粗效过滤器4和空气净化装置，以降低风阻，粗效过滤器4和空气净化装置5可商购获得。The control module 6 can also detect the pressure difference between the coarse filter 4 and the air purification device 5. When the pressure difference exceeds the set value, it can prompt that the coarse filter 4 and the air purification device need to be replaced or cleaned to reduce the wind resistance. The coarse filter 4 and the air cleaning device 5 are commercially available.
控制模块6还提供免费的远程通讯端口，可接入建筑物的楼宇自控系统中，作为楼宇自控系统中的一个子系统，集成在楼宇自控制系统设备中，可在楼宇监控室内实现远程实时监控，及时发现问题，减少人工误操作的可能性。The control module 6 also provides a free remote communication port, which can be connected to the building automatic control system of the building. As a subsystem of the building automatic control system, it is integrated in the building automatic control system equipment and can realize remote real-time monitoring in the building monitoring room , to detect problems in time and reduce the possibility of manual misoperation.
上述实施例只是为了说明本发明的技术构思及特点，其目的是在于让本领域内的普通技术人员能够了解本发明的内容并据以实施，并不能以此限制本发明的保护范围。凡是根据本发明内容的实质所做出的等效的变化或修饰，都应涵盖在本发明的保护范围内。The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and its purpose is to enable those of ordinary skill in the art to understand the content of the present invention and implement it accordingly, and cannot limit the protection scope of the present invention. All equivalent changes or modifications made according to the essence of the present invention shall fall within the protection scope of the present invention.
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Application publication date: 20180824 |