CN107796079B - Top-feeding top-returning purifying ventilation system - Google Patents
Top-feeding top-returning purifying ventilation system Download PDFInfo
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- CN107796079B CN107796079B CN201710128668.8A CN201710128668A CN107796079B CN 107796079 B CN107796079 B CN 107796079B CN 201710128668 A CN201710128668 A CN 201710128668A CN 107796079 B CN107796079 B CN 107796079B
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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
- F24F7/02—Roof ventilation
- F24F7/025—Roof ventilation with forced air circulation by means of a built-in ventilator
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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
- F24F13/02—Ducting arrangements
- F24F13/0227—Ducting arrangements using parts of the building, e.g. air ducts inside the floor, walls or ceiling of a building
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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
- F24F13/02—Ducting arrangements
- F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
- F24F13/068—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser formed as perforated walls, ceilings or floors
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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]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention relates to a top-feeding top-returning purification ventilation system, comprising: an air supply opening arranged at the top of the room for supplying circulated air composed of treated return air and treated fresh air to the room; an air return opening disposed at the top of the room for introducing return air from the room into the ventilation system for treatment; the air supply opening and the air return opening are both provided with diffusion plates, so that circulating air conveyed by the air supply opening is jet flow, return air introduced by the air return opening is converged, and the relative positions of the air supply opening and the air return opening, the orifice wind speed of the air supply opening and the orifice wind speed of the air return opening are regulated so that in the space of the room, an air supply jet flow area for conveying the circulating air by the air supply opening and a return air converging area for introducing the return air by the air return opening are not overlapped. By using the top-feeding top-returning purification ventilation system, indoor space can be greatly saved while various air quality parameters are ensured.
Description
Technical Field
The present invention relates generally to the field of ventilation facilities, and more particularly to a top feed, top return, clean ventilation system.
Background
The current air flow organization of the purification and ventilation system is top-feed bottom-feed or top-feed bottom-side-feed, namely, air is discharged from the top of a room (such as a ceiling or a suspended ceiling) and air is returned from the bottom floor or a wall on the lower side surface. The top-feeding lower return or top-feeding lower side return has the advantages of uniform distribution of air circulation and good air purification and ventilation effect. However, it is disadvantageous in that since the return air inlet is disposed on the ground or the wall surface, no shielding (such as equipment, decorations, and even staff) can occur around the return air inlet to avoid affecting the circulation of the air flow, which is extremely wasteful of space. This problem is particularly pronounced in sites with high cleanliness requirements (e.g., ISO6 clean plants), because the cost per square meter in such high cleanliness sites may be as high as tens of thousands of yuan, which may be referred to as "undersize gold", to achieve the desired operating conditions, and thus space wastage is intolerable. However, in the case of high cleanliness requirements, the top-feeding top-returning airflow structure cannot be adopted, and because the top-feeding top-returning purification ventilation system cannot reach the air quality parameters required by the high-cleanliness field, such as cleanliness, temperature and humidity, the high-cleanliness field can only be forced to exchange space for the air quality scheme, i.e. the top-feeding bottom-returning or top-feeding side-returning scheme.
Disclosure of Invention
The object of the invention is to provide a top-feed top-return clean ventilation system with which it is possible to ensure various air quality parameters (such as cleanliness, temperature and humidity) while at the same time saving considerably indoor space. For example, the top feed top return clean ventilation system of the present invention can be adapted for use in ISO7, ISO6, and even ISO5 non-uniflow clean plants.
According to the invention, the aforementioned task is achieved by a top-feed top-return clean ventilation system comprising:
an air supply port arranged at the top of the room for supplying air consisting of return air and fresh air subjected to heat-humidity and purification treatment to the room;
an air return opening disposed at the top of the room for introducing return air from the room into the ventilation system for treatment;
the air supply opening and the air return opening are both provided with diffusion plates, so that air conveyed by the air supply opening is jet flow, air return introduced by the air return opening is confluence, the relative positions of the air supply opening and the air return opening, the orifice wind speed of the air supply opening and the orifice wind speed of the air return opening are regulated so that in the space of the room, an air supply jet flow area conveyed by the air supply opening covers the whole working area and the air return confluence area (the control range is small) of the air return introduced by the air return opening is not overlapped with each other.
The top-feeding top-returning purification and ventilation system has the advantages that (1) as the return air inlet is positioned on the top of a room, such as a ceiling board, the return air inlet does not occupy the space in the room, namely the space in the room is better utilized, and the circulation of air flow is not influenced; (2) Through setting up the relative position of supply-air inlet and return air inlet and the drill way wind speed of supply-air inlet and the drill way wind speed of return air inlet, can make the supply air jet area that the supply-air inlet carried and the return air that the return air inlet introduced the return air and converge the district and overlap each other to can realize better air quality parameter, this is based on the following independent insight of inventor: the existing top-blowing top-returning purification ventilation system cannot guarantee good air quality parameters, and the main reason is that the air return opening and the air supply opening are simultaneously arranged at the top of a room, so that processed air sent out by the air supply opening and return air introduced by the air return opening are easy to form a short circuit, namely, part of air sent out by the air supply opening is directly introduced into the air return opening as return air, so that the part of air supply cannot achieve the effects of purifying the room and adjusting the temperature and humidity of the room, and the air quality parameters in the room are greatly influenced. In the invention, the short circuit problem can be effectively solved by isolating the air supply jet flow area of the air supply port from the return air converging area of the return air port, thereby ensuring the air quality parameter; in addition, the air supply of the air supply port is realized as jet flow, and the air return of the air return port is realized as confluence, so that the isolation can be realized more easily, because the jet flow can be used for precisely defining the air supply jet flow area covered by the jet flow and ensuring the air speed of the working surface in the air supply jet flow area, the confluence air speed is inversely proportional to the square of the distance of the air return port, and the air return control range is small. Therefore, the boundary between the air supply jet flow area and the return air converging area can be accurately determined, and better isolation of the air supply jet flow area and the return air converging area is achieved.
In a preferred embodiment of the invention, it is provided that a return air opening is arranged at the top of the room every second air supply opening, wherein two adjacent air supply openings communicate with the same air supply line. By this preferred solution, the relative positions of the supply and return air openings can be determined such that a good separation of the supply and return air jet areas and the return air collecting area is ensured. In other embodiments, other arrangements are also contemplated, such as arranging one return air port every third supply air port, although this may result in additional building overhead costs, a larger supply air jet area may be realized, thereby providing a larger working surface.
In a further preferred embodiment of the invention, it is provided that the opening wind speed of the supply opening is set to 5.0m/s and the opening wind speed of the return opening is set to 2.5m/s. By means of the preferred scheme, the orifice wind speed of the air supply opening and the orifice wind speed of the air return opening can be set so that good isolation of the air supply jet flow area and the air return converging area is ensured. In other embodiments, other port wind speeds are also contemplated, depending on different air quality requirements and different relative positions between the supply and return air ports.
In a further preferred embodiment of the present invention, it is provided that the aperture ratio of the diffuser plate of the air supply port is 15%, and the area of the working surface corresponding to the air supply jet region is 9m 2 Wherein the wind speed of the working surface is 0.2m/s to 0.3m/s. By the aid of the preferable scheme, the air supply jet flow area with clear boundary can be realized, so that better isolation is realized, and air flow short circuit is avoided.
In another preferred embodiment of the present invention, it is provided that the aperture ratio of the diffuser plate of the return air inlet is 30%. Through this preferred scheme, can realize the clear return air confluence district in boundary to realize better isolation, avoid the air current short circuit.
In a further preferred embodiment of the invention, it is provided that the diffuser plate of two adjacent air inlets is perforated at two sides of the diffuser plate opposite each other and is not perforated at the side opposite the return air inlet. By means of this preferred solution, a more uniform distribution of the air supply to the air jet area is achieved, that is to say the air supply output by the air supply opening is distributed uniformly over the entire air jet area, including the edge area of the diffuser plate, so that a better air supply effect and improved air quality parameters in the room are achieved.
In one embodiment of the invention, the top-feed and top-return clean ventilation system can be used in an ISO5 class non-unidirectional flow clean room. By means of the expansion scheme, the top-feeding top-returning purification and ventilation system can be applied to ISO 7-level, ISO 6-level and ISO 5-level non-unidirectional flow clean plants, and therefore better space utilization in the plants is achieved.
Drawings
The invention will be further elucidated with reference to a specific embodiment in conjunction with the drawings.
Fig. 1 shows a schematic diagram of a top feed, top return clean ventilation system according to the present invention.
It should be noted that the components in the figures may be shown exaggerated for illustrative purposes and are not necessarily to scale.
Detailed Description
Fig. 1 shows a schematic diagram of a top feed, top return clean ventilation system 100 according to the present invention.
As shown in fig. 1, the top feed, top return, clean ventilation system 100 according to the present invention includes an air supply port 101 arranged at the top of a room, where the air supply port 101 is arranged at a ceiling 111 of the room. The air supply port 101 is configured to supply air consisting of treated fresh air and return air to a room. Within the scope of the present invention, return air refers to the air flow recovered from the room into the ventilation equipment for treatment (e.g. purification), while fresh air refers to the air flow after being introduced from outdoors (e.g. purification, temperature regulation, humidity regulation), the mixture of treated return air and treated fresh air being referred to as supply air.
The system 100 also includes an air return 102, which is also disposed at the top of the room, where the air return 102 is disposed at a ceiling 111 of the room. The return air inlet 102 is configured to introduce return air from a room into the ventilation system 100 for treatment. In the present invention, the main components of the system 100 are placed in the technical interlayer 110 of a suspended ceiling, but this is merely exemplary.
In fig. 1, one return air inlet 102 is arranged every two air inlets 101, wherein two adjacent air inlets 102 are communicated with the same air supply duct 107, and each return air duct 102 is connected with a return air duct 106. It should be noted, however, that this is merely exemplary and that in other embodiments, other arrangements may be used, such as arranging one return air inlet 102 every third supply air inlet 101.
The air supply port 101 and the return port 102 are each provided with a diffusion plate 108 such that the air supplied from the air supply port 101 is a jet flow and the return air introduced from the return port 102 is a confluence, and the diffusion plate 108 is a plate having a certain aperture ratio. For example, by setting the aperture ratio of the diffuser plate 108 of the air supply port 101 to 15% and the aperture ratio of the expansion plate 108 of the return port 102 to 30%, the aperture speeds of the air supply port 101 and the return port 102 can be set, the air supplied from the air supply port 101 can be formed into a jet flow, and the return air introduced from the return port 102 can be converged. In this way, the isolation can be more easily achieved because the use of jets not only precisely defines the supply jet area 103 covered by the jet, but the converging wind velocity is inversely proportional to the square of the distance of the return air opening, and the range of return air control is small. The boundary between the supply air jet area 103 and the return air converging area 104 is accurately determined, and better isolation between the two areas is achieved. In addition, the diffusion plate 108 of the adjacent two air outlets 101 is perforated at two sides 109 opposite to each other of the diffusion plate 108 and is not perforated at the side opposite to the return air inlet, whereby it is possible to achieve a supply air jet area 103 in which the distribution of circulated air is more uniform, that is, the circulated air outputted from the air outlets 101 is uniformly distributed throughout the supply air jet area 103 including the edge area of the diffusion plate, thereby achieving a better supply air effect and an improved air quality parameter in the room. Here, the orifice wind speed of the supply-air port is preferably adjusted to 5.0m/s, and the orifice wind speed of the return-air port is preferably adjusted to 2.5m/s, so that the wind speed of the working area 105 defined by the supply-air jet area 103 can reach 0.2m/s to 0.3m/s to meet the needs of most industrial applications. Furthermore, by the relative positioning of the air outlet 101 and the air return 102 of the present invention, a larger working surface, even all working surfaces, in a room can be provided with sufficient wind speed (i.e. the wind speed of clean circulating wind), thereby ensuring air quality parameters of the working surfaces, such as oxygen content, cleanliness, temperature and humidity, etc. For example, a sufficient velocity of the air supply can not only provide clean air (including oxygen), but also carry away the thermal and wet loads (including sensible and latent) of the work surface, thereby ensuring various air quality parameters of the work surface.
As shown in fig. 1, the boundary between the supply air jet area 103 and the return air converging area 104 is clear and does not overlap with each other, thereby effectively avoiding the phenomenon of "air flow short circuit", i.e. avoiding that the supply air output from the air outlet 101 is directly introduced into the return air inlet 102 as return air.
The top feed, top return, clean ventilation system 100 according to the present invention has the advantages of (1) because the return air port 102 is located on the top of the room, such as a ceiling tile, the return air port 102 does not occupy the room space in use, i.e., the room space is better utilized, without affecting the flow of return air; (2) By setting the relative positions of the air supply port 101 and the air return port 102, and the orifice wind speed of the air supply port 101 and the orifice wind speed of the air return port 102, the air supply jet flow area 103 for conveying circulating air by the air supply port 101 and the air return converging area 104 for introducing air return by the air return port 102 are not overlapped with each other, so that better air quality parameters can be realized, which is based on the unique insight of the inventor: the existing top-blowing top-returning purification ventilation system cannot ensure good air quality parameters, mainly because the return air inlet and the air supply outlet are arranged at the top of a room at the same time, so that the processed air supply from the air supply outlet and return air introduced by the return air inlet are easy to form a short circuit, namely, part of air sent from the air supply outlet is directly introduced into the return air inlet as return air, so that the part of air supply does not achieve the effects of purifying a room, regulating temperature and humidity of the room, thereby greatly influencing the air quality parameters in the room, and in the invention, the short circuit problem can be effectively solved by separating the air supply jet area 103 of the air supply outlet 101 from the return air converging area 104 of the return air inlet 102, thereby ensuring the air quality parameters; in addition, the isolation can be more easily achieved by implementing the air supply of the air supply port 101 as a jet flow and the return air of the return air port 102 as a confluence, because the jet flow can be used to precisely define the air supply jet flow area (i.e., the working area) covered by the jet flow, and ensure the wind speed of the working surface 105 in the air supply jet flow area 103, and the confluence wind speed is inversely proportional to the square of the distance of the return air port, and the control range is small. In this way, the boundary between the supply air jet area 103 and the return air converging area 104 can be determined more accurately, and better isolation between the two areas can be achieved.
While certain embodiments of the present invention have been described in this application, it will be obvious to those skilled in the art that such embodiments are provided by way of example only. Numerous variations, alternatives, and modifications will occur to those skilled in the art without departing from the scope of the invention. The appended claims are intended to define the scope of the invention and to cover such methods and structures within the scope of these claims themselves and their equivalents.
Claims (7)
1. A top feed, top return, clean ventilation system, comprising:
an air supply opening arranged at the top of the room for supplying circulated air composed of treated return air and treated fresh air to the room;
an air return opening disposed at the top of the room for introducing return air from the room into the ventilation system for treatment;
wherein, every a plurality of supply-air inlets arrange a return air inlet, and supply-air inlet and return air inlet all dispose the diffuser plate, the diffuser plate of diffuser plate is the board that has certain aperture ratio, and the diffuser plate of two adjacent supply-air inlets is in two relative sides department trompil of diffuser plate, and the side department of being opposite to the return air inlet does not trompil, and the aperture ratio of the diffuser plate of supply-air inlet is 15%, the aperture ratio of the diffuser plate of return air inlet is 30%, makes the circulated air that is carried by the supply-air inlet be the jet and the return air that is introduced by the return air inlet is the confluence, and the relative position of supply-air inlet and return air inlet and the drill way wind speed of supply-air inlet and the drill way wind speed of return air inlet are adjusted so that in the space in room, the supply-air jet district that the supply-air inlet carried circulated air and the return air inlet introduced return air confluence district each other.
2. The overhead and overhead back-purge ventilation system of claim 1, wherein one return air port is arranged every two air ports in the top of the room, wherein two adjacent air ports are in communication with the same air supply duct.
3. The overhead and back-purge ventilation system according to claim 1, wherein the orifice wind speed of the supply air port is adjusted to 2.5m/s and the orifice wind speed of the back air port is adjusted to 5m/s.
4. The top-feed top-return clean ventilation system of claim 1, wherein the area of the working surface of the supply port corresponding to the supply jet zone is 9m 2 Wherein the wind speed of the working surface is 0.2m/s to 0.5m/s.
5. The overhead and back-flush ventilation system of claim 1, wherein one return air port is disposed every third air port in the top of the room.
6. The top-feed, top-return, clean ventilation system of claim 2, wherein the diffuser plates of adjacent two supply-air outlets are perforated at two sides of the diffuser plates opposite each other and are not perforated at sides opposite the return air outlets.
7. The top-feed, top-return, clean-ventilation system of any one of claims 1 to 6, wherein the top-feed, top-return, clean-ventilation system is used in ISO 4-class to ISO 10-class clean plants.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710128668.8A CN107796079B (en) | 2017-03-06 | 2017-03-06 | Top-feeding top-returning purifying ventilation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710128668.8A CN107796079B (en) | 2017-03-06 | 2017-03-06 | Top-feeding top-returning purifying ventilation system |
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| CN107796079A CN107796079A (en) | 2018-03-13 |
| CN107796079B true CN107796079B (en) | 2023-04-25 |
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| CN113287578B (en) * | 2021-05-14 | 2022-08-12 | 嵊州陌桑高科股份有限公司 | Top-delivering and top-returning airflow control system for culture room and installation method thereof |
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