CN115978670A - Distributed air conditioner purification system for tall and big clean factory building - Google Patents

Abstract

The invention provides a distributed air-conditioning purification system for a tall clean factory building, wherein a clean hall of the factory building is divided into a plurality of purification subareas in the horizontal direction, the air-conditioning purification system comprises a plurality of air-conditioning purification subsystems which are correspondingly arranged with the purification subareas, and each subsystem comprises: the air treatment device comprises a coarse filter, a fan and a surface cooling heater; the filtering air supply device is positioned at the downstream of the air path of the air treatment device and comprises two or more air supply layers arranged at different heights; the air return device is positioned on the upstream of the air path of the air treatment device; the fresh air processing device is positioned at the upstream of the air path of the air return device; the measurement and control device comprises an environmental parameter detector for detecting environmental parameters of the purification subareas and a regulator for regulating the environmental parameters of the purification subareas, and the regulator is controlled to regulate the environmental parameters according to the environmental parameter design indexes of the purification subareas and the detection results of the environmental parameter detector, so that accurate air conditioner purification in the subareas and the subareas is realized, and the energy-saving effect is remarkable.

Description

Distributed air-conditioning purification system for tall clean workshops

technical field

The invention relates to the field of air conditioning purification, in particular to a distributed air conditioning purification system for tall clean workshops.

Background technique

Tall clean workshops refer to workshops that have requirements for indoor temperature, humidity and air cleanliness and have a large space. The production, assembly and testing of large-scale precision industrial products and equipment such as large-scale aerospace products need to be carried out in tall clean workshops. It is required to maintain a constant low temperature, low humidity, and clean air-conditioning and purification environment in the tall and large space. The cleanliness of indoor air is usually not high. Below grade 8. The existing tall clean workshops adopt centralized air-conditioning and purification schemes, pumping indoor air back to the air handling unit for centralized temperature and humidity treatment. The air handling unit is centrally installed in the air-conditioning room outside the clean hall.

In the prior art, the Chinese patent application whose publication number is CN 102297502A discloses a vertically installed FFU system for a clean workshop. ), the FFU is an air self-purifier and only has the function of air purification, but has no temperature and humidity adjustment function, so it cannot perform air conditioning on the factory building. In addition, the air supply distance of the FFU system is very short, which is only suitable for clean workshops with low heights such as electronic workshops, but not for tall clean workshops.

In the prior art, the Chinese patent application with the publication number CN105299758A discloses an environment-friendly purification air-conditioning system for a clean workshop. The water body in the sump is heated or cooled to realize the adjustment and control of the air humidity. However, the same heat exchange coil needs to realize both the temperature control function and the humidity control function. These two parameters are coupled changes, so the system cannot independently control the two parameters of temperature and humidity at the same time. Therefore, the humidity control method exists defect.

In summary, the existing centralized air-conditioning purification technology solutions for tall clean workshops have the following problems:

(1) The area of the air-conditioning machine room is large, and the investment in civil construction is large. The air-conditioning purification air volume of the tall clean workshop is very large, so the area of the air-conditioning machine room required by the centralized air-conditioning purification system is also large, and the area of the air-conditioning machine room is usually 100% to 130% of the air-conditioning purification area, so the civil engineering investment is large, and some The layout of the workmanship testing room posed great difficulties.

(2) The air supply pipe and return air pipe of the air conditioning purification system are large and long, the investment in the air pipe is large, and the energy consumption of the fan transmission is large. The tall clean workshop has a large air volume, so the air duct size of the centralized air conditioning purification system is large. Moreover, the clean area of the tall clean workshop has a large space, and the length of the air supply duct and return air duct of the centralized air conditioning purification system is very long, even exceeding 200m, so the investment in the air duct of the centralized air conditioning purification system and the energy consumption of the fan transmission are relatively large. .

(3) The air-conditioning purification system in the clean hall of the centralized air-conditioning purification scheme can only be switched on and off as a whole, and it is difficult to realize the air-conditioning purification of the sub-regional and local spaces in the tall space, and it is impossible to regulate the vertical airflow organization.

However, tall clean workshops are designed according to the working conditions of the largest product size and the largest number of products, but in fact this extreme situation rarely occurs, and most of the cases are only for product testing in local spaces. However, it is difficult to achieve air-conditioning purification in sub-regions and local spaces by adopting a centralized air-conditioning purification scheme. Only the air-conditioning purification mode of the whole space can be used to perform air-conditioning purification on a large number of areas and spaces without product testing, resulting in a serious waste of air-conditioning energy. Sometimes products in different areas of a clean hall require different environmental parameters, but the existing centralized air-conditioning purification system cannot meet this demand.

Contents of the invention

In order to solve the above-mentioned problems, the present invention provides a low-energy-consumption air-conditioning purification system for tall and large clean workshops that can independently regulate local environmental parameters. Fractional" structure. The clean hall of the factory building is divided into multiple purification zones in the horizontal direction according to the plane grid. The air conditioning purification system includes a plurality of air conditioning purification subsystems arranged in a distributed manner in a one-to-one correspondence with the multiple purification zones. , each of the air-conditioning purification subsystems includes: an air treatment device, which includes: a coarse filter arranged in sequence on the air flow path, a fan for pressurizing the air flow, and a surface cooling heater; a filter air supply device, which It is located downstream of the air flow path of the air handling device and includes two or more air supply layers that are connected in parallel and arranged at different heights. The air outlet; the return air device, which is located upstream of the air flow path of the air treatment device, and includes a return air main pipe connected to the air treatment device, a return air outlet arranged in the corresponding purification sub-area, and a return air duct communicated with the air return outlet; The fresh air processing device is located upstream of the air flow path of the return air device, communicates with outdoor fresh air on the air inlet side, and includes a fresh air pipe connected to the return air pipe on the air outlet side and a fresh air meter cooling device on the fresh air pipe. Heater; measurement and control device, which includes an environmental parameter detector for detecting the environmental parameters of the purification zone and a regulator for adjusting and controlling the environmental parameters of the purification zone, wherein the measurement and control device is designed according to the environmental parameters of each purification zone and The detection result of the environmental parameter detector realizes the separate adjustment and control of the environmental parameters of each purification zone by controlling the regulator.

Preferably, there are structural sandwich walls on both sides of the long side of the clean hall of the factory building, and the clean hall is divided into a plurality of clean partitions in a plane grid manner, wherein, along the transverse direction of the clean hall, the midline of the short side is used as the boundary Divided into two rows, longitudinally divided into K columns with a distance of 5m to 8m or the midline position of the structural column, so as to form 2K purification partitions with basically the same volume. A plurality of air-conditioning purification subsystems are arranged in a distributed manner in a one-to-one correspondence between the partitions, and the multiple air-conditioning purification subsystems are distributed in the structural sandwich wall near the corresponding purification partition.

Preferably, the environmental parameter design indicators include design air temperature, design air humidity, design air cleanliness, and design indoor positive pressure, and the environmental parameters include air temperature, humidity, cleanliness, and air pressure.

Preferably, the regulator includes a fresh air regulating valve arranged on the fresh air pipe, a water supply regulating valve arranged on the cold/hot water flow path between the surface cooling heater and the cold/hot water source, and a water supply regulating valve arranged on the upstream side of each air supply layer. The air supply control valve and the measurement and control device adjust and control the opening of the air conditioning water supply regulating valve in response to the return air temperature detected by the temperature and humidity sensor according to the design index of the environmental parameters of the corresponding purification zone, and respond to the return air temperature detected by the temperature and humidity sensor. The relative humidity is used to adjust and control the opening of the water supply regulating valve of the fresh air air conditioner, and to adjust and control the fan operating frequency of the air conditioning purification sub-system corresponding to the purification zone in response to the particle concentration detected by the particle concentration sensor in the purification zone. The air pressure is used to adjust and control the fan operating frequency of the fresh air unit.

Preferably, the number of two or more air supply layers and the height of the air supply layers of each corresponding purification zone are determined according to the height of the plant and the maximum height of the products in each corresponding purification zone.

Preferably, the air handling device further includes: a box body, in which a coarse filter, a fan, and a surface cooling heater are accommodated; a water accumulation tray installed in the box body for receiving condensed water from the air conditioner; and a surface cooling heater A connected air-conditioning return water pipe; and an air-conditioning water supply pipe, wherein an air-conditioning water supply valve and an air-conditioning return water valve are arranged on the air-conditioning return water pipe and the air-conditioning water supply pipe respectively.

Preferably, the air supply port of the filter air supply device adopts an aluminum alloy nozzle air supply port with adjustable air supply direction, the horizontal distance between two adjacent air supply ports is 2 to 3m, and the design wind speed of the air supply port is 10 to 15m/s.

Preferably, the fan of the air handling device is a variable frequency centrifugal fan, and the measurement and control device keeps the concentration of suspended particulates stable at the set value through the frequency conversion adjustment of the fan. When the concentration of suspended particulates exceeds the set value, the operating frequency of the fan is increased, and vice versa. operating frequency.

Preferably, the air supply outlets of the filter air supply device are arranged in layers in the clean working area above the return air outlets on the sandwich wall of the clean hall.

The decentralized air-conditioning purification system for tall clean workshops of the present invention, since the air-conditioning purification equipment is scattered and arranged in the structural sandwich walls on both sides of the clean hall, the useless space inside the architectural structural sandwich walls is fully utilized, and there is no need to set up an air-conditioning machine room. The size and length of air-conditioning purification air ducts are greatly reduced, and the investment in air-conditioning air ducts and the energy consumption of fan transmission are greatly reduced. And in the horizontal direction, the air-conditioning purification of sub-regions is realized, and in the vertical direction, the layered air-conditioning with regional adjustment is realized. The air-conditioning control can perform precise air-conditioning and purification on the local space environment around the products in the tall clean workshop, which greatly improves the air-conditioning efficiency. The investment, operating energy consumption and cost of the purification system are greatly reduced, and the guarantee ability of indoor environmental parameters and system reliability are also improved.

Description of drawings

Fig. 1 is a plan layout diagram showing the layout of the air-conditioning purification subsystem and the purification sub-systems of the air-conditioning purification system according to an embodiment of the present invention;

Fig. 2 is a schematic diagram showing the structural overview of the air conditioning purification subsystem of the air conditioning purification system according to an embodiment of the present invention;

3 is a sectional view taken along line A-A in FIG. 1 showing a detailed structure of the air conditioning purification system according to an embodiment of the present invention.

Detailed ways

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that, unless otherwise stated, the following examples are illustrative only and do not limit the invention in any way.

Tall clean workshops usually include a clean hall, ancillary rooms and equipment rooms. The clean hall can be rectangular, and the two walls on the long sides are structural sandwich walls.

In the present invention, the clean hall of the tall clean workshop is taken as the purification object. The structure of the air-conditioning purification system for tall clean workshops according to the present invention will be described below with reference to FIGS. 1 to 3 .

First, divide the clean hall into a plurality of clean partitions in the horizontal direction. Preferably, it can be divided in a plane grid manner. For example, in the example shown in Figure 1, the clean hall is divided into rectangular grids. into 12 rectangular partitions D1 to D12. As a preferred example, for example, as shown in Figure 1, the clean zone can be divided into two rows along the transverse direction of the clean hall with the midline of the short side as the boundary, and along the longitudinal direction of the clean hall at a predetermined interval (for example, with a distance of 5m to 8m) The purification partitions are evenly divided into K columns, so that the clean hall of the tall clean workshop is divided into 2K purification partitions with basically the same volume. As an alternative, for example, in the case where J pairs of structural columns are arranged at the same interval along the longitudinal direction of the clean hall, if the clean partition is divided into two rows along the transverse direction of the clean hall with the midline of the short side as the boundary, and along the clean hall The longitudinal direction of the hall is divided by the midline position of the structural column, so that the clean hall of the tall clean workshop is divided into 2 (J-1) purification partitions with basically the same volume.

The air-conditioning purification system includes a plurality of air-conditioning purification sub-systems distributed in a manner corresponding to each purification zone. For example, as shown in FIG. 1 , the air-conditioning purification system 1000 includes 12 air-conditioning purification subsystems S1 to S12 arranged in a one-to-one correspondence with each purification zone D1 to D12 . Preferably, each air-conditioning purification subsystem can be scattered and arranged in the structural sandwich wall of the corresponding purification zone, and each air-conditioning purification subsystem can adopt the same structure.

In addition, the arrangement of the air-conditioning purification subsystem is not limited to the decentralized arrangement in Figure 1, for example, it can be arranged in other positions outside the corresponding purification zone, or only in the structural sandwich wall on one side according to actual needs.

Referring to FIG. 2 and FIG. 3 , the structure of the air-conditioning purification subsystem will be described by taking the air-conditioning purification subsystem S1 arranged corresponding to the purification zone D1 in FIG. 1 as an example.

As shown in Figure 2, the air-conditioning purification subsystem S1 includes: an air treatment device 1 that performs rough filtering and temperature adjustment of the air; The air sent by the processing device 1 is processed by high-efficiency filtration, and the clean air is sent to the corresponding purification partition in the clean hall; the air return device 3 arranged upstream of the air flow path of the air processing device 1 communicates with the clean hall The corresponding purification partitions and the fresh air treatment device 4 can mix the indoor return air in the clean hall with the fresh air processed by the fresh air treatment device and then send it to the air treatment device 1; the fresh air treatment device 4 can cool and dehumidify the outdoor fresh air in summer The outdoor fresh air is heated and heated in winter; the measurement and control device 5 adjusts and controls the operation of the air treatment device 1, the filter air supply device 2, the return air device 3 and the fresh air processing device 4 to adjust the purification zones. Environmental parameters. Among them, the environmental parameters include air temperature, humidity, suspended particulate matter concentration and indoor positive pressure.

Thus, the air flow path of the air conditioning purification sub-system according to the present invention is constituted as follows. First, as shown in FIG. 2 , the air flow entering the air treatment device 1 through the return air device 2 includes two sources: the indoor return air flowing in from the corresponding purification zone and the fresh air flowing in through the fresh air processing device. These two streams of air are sent to the corresponding purification sub-area after the coarse-effect filtration of the air treatment device 1 and the cooling (or heating) treatment of the surface cooling heater, and then the high-efficiency filtration treatment of the filter air supply device 2, which is the corresponding purification zone. The purification zone provides clean air after purification and temperature and humidity adjustment.

Referring to FIG. 3 , the detailed structure of the air-conditioning purification sub-system will be described by taking the air-conditioning purification sub-system S1 as an example.

First, the detailed configuration of the air handling device 1 will be described. The air treatment device 1 includes: a coarse-effect filter 12 sequentially arranged on the air flow path, a fan 13 for pressurizing the airflow, and a surface cooling heater 14, wherein the surface cooling heater 14 flows through the coarse-effect filter in sequence 12 and the air flow behind the blower fan 13 is cooled/heated to regulate the temperature of the controlled circulation air.

The air handling device 1 may also include a box body 11 containing a coarse filter 12 , a fan 13 and a surface cooling heater 14 , and the box body 11 may be arranged in the structural sandwich wall.

In addition, the surface cooling heater 14 communicates with an air conditioner return water pipe 18 and an air conditioner water supply pipe 19 . The surface cooling heater 14 is available for both winter and summer. When cold water is connected in summer, it can be used as a surface cooler to cool the air flowing through it. When hot water is connected in winter, it can be used as a heater. , in order to heat the air flowing through it.

Fan 13 is a frequency conversion centrifugal fan, and the air supply volume of the fan can be adjusted by frequency conversion to meet different air supply volume requirements and reduce operating energy consumption.

As a preferred manner, the surface cooling heater 14 is installed in the box body 11 at an angle of not more than 45° from the vertical direction, so as to reduce the footprint of the air-conditioning treatment device and facilitate installation in the structural sandwich wall. In addition, the oblique installation of the surface cooling heater also helps the air-conditioning condensed water on its surface to flow into the water collecting pan 15 of the side wall.

The bottom of the surface cooling heater 14 is provided with a water collecting pan 15 for collecting the condensed water of the air conditioner, and the bottom of the water collecting pan 15 is provided with a condensed water drain pipe for discharging the condensed water. A floor drain or drain pit connected to the condensed water drain pipe to remove condensed water or water leakage from the air handling device 1 .

The surface cooling heater 14 utilizes the air conditioner return pipe 18 and the air conditioner water supply pipe 19 to pass cold water or hot water to cool or heat the air flow passing through the box body 11 . The surface cooling heater is used as a cooler in summer to cool the indoor air. The cold source is the chilled water of the air conditioner provided by the outside, usually 7°C water supply and 12°C return water; it is used as a heater in winter to cool the indoor air. For heating, the heat source is air-conditioned hot water provided by the outside world, usually 60°C water supply and 50°C return water.

Preferably, the air-conditioning return water pipe 18 and the air-conditioning water supply pipe 19 are also equipped with an air-conditioning water supply valve 16 and an air-conditioning return water valve 17 respectively. It can also be used to adjust the hydraulic balance of the air-conditioning cold water system of different air-conditioning purification subsystems.

As a preferred example, the box body 11 of the air handling device 1 can be a vertical flat structure, adopting the structural form of return air from the lower part and air supply from the upper part. The temperature, humidity and air supply volume of the air sent into the corresponding purification zone are adjusted and controlled to meet the temperature, humidity and cleanliness requirements of the air corresponding to the purification zone in the clean workshop.

Preferably, a fixed bracket can be set at the bottom of the box body 11 of the air handling device 1 to fix the box body 11 on the ground, a rubber shock absorber is set at the contact position between the fixing bracket and the air handling device, and the bottom of the air handling device 1 A space for the installation of the return air device is reserved between the bottom and the ground.

Preferably, the thickness W1 of the air handling device 1 is less than half of the width W of the structural sandwich wall, so as to facilitate installation or maintenance in the structural sandwich wall.

Next, the detailed structure of the filter blower 2 is demonstrated. The filter air supply device 2 includes two or more air supply layers with flow paths connected in parallel and arranged at different heights. For example, as shown in FIG. 3 , it may include three air supply layers L1 to L3.

The structure of each air supply layer of the filter air supply device 2 is the same, and the structure of each air supply layer is described by taking the air supply layer L1 in FIG. 3 as an example. The air supply layer L1 includes a high-efficiency filter 206 and an air supply port 207 communicating with the corresponding purification zone D1, and sends the clean air filtered by the high-efficiency filter from the air outlet of the air treatment device 1 into the corresponding purification zone. In addition, an air supply muffler 201 can be provided on the air supply main pipe 202 connecting each air supply layer L1 to L3 and the air handling device 1 to reduce the impact of fan noise on the room.

As an example, in the embodiment shown in FIG. 3 , the filter air supply device 2 includes three air supply layers L1 to L3 , preferably, the height distance between each air supply layer is preferably 4m˜6m. But it is not limited thereto, and the number of air supply layers may also be two, four or more. The number of layers of the air supply layer, the height of each air supply layer and the number of air supply outlets can be determined according to the height of the factory building, the height of the products in the factory building and/or the environmental conditions. The center height of the highest air supply layer is usually the clean hall The maximum height of the inner product.

Specifically, the air supply layer L1 also includes an air supply branch pipe 205 communicating with the air supply main pipe 202, a high-efficiency filter 206, and an air supply outlet 207 communicating with the high efficiency filter 206, wherein the air supply main pipe 202 and the air supply branch pipe 205 are generally connected vertically. The muffler provided on the main air supply pipe 202 can eliminate the noise of the air flow sent to each air supply layer, thereby reducing the impact of the fan noise of the air handling device 1 on the factory building.

Similarly, the air supply layer L2 includes an air supply branch pipe 208 communicating with the air supply main pipe 203 , a high efficiency filter 209 and an air supply outlet 210 communicating with the high efficiency filter 209 . The air supply layer L3 includes an air supply branch pipe 211 connected to the air supply main pipe 204 , a high efficiency filter 212 and an air supply port 213 connected to the high efficiency filter 212 .

As an example, each air supply layer is provided with one air supply opening, but obviously the number of air supply openings is not limited thereto, and two, three or more air supply openings may be provided for each air supply layer. Preferably, the air supply outlet is set above the return air outlet of the clean hall of the factory building and at the inner side of the structural sandwich wall below the boundary line between the unclean work area and the clean work area.

Preferably, the distance between the air supply opening 207 of the air supply layer L1 (that is, the air supply opening of the first layer closest to the ground) and the ground is 5m-6m.

In addition, the air supply port is preferably an aluminum alloy nozzle air supply port with adjustable air supply direction. Select the nozzle size according to the system air supply volume and the number of air supply outlets to ensure the air supply speed. The outlet design wind speed should be 10m/s~15m/s.

In this embodiment, the filtration grades of the high-efficiency filters in the air-supply layer are all H12-H14, and the high-efficiency filters are arranged in the static pressure box, and each air supply port is connected with the air supply end of each static pressure box.

Next, the detailed structure of the air return device 3 will be described. The return air device 3 includes a return air main pipe 31 connected to the air treatment device 1, a return air outlet 35 arranged in the corresponding purification zone D1, and a return air pipe 33 communicated with the return air outlet 35. The return air pipe 33 is located in the return air main pipe 31 The upstream of the process and communicate with the return air main pipe 31.

A return air muffler 32 is provided on the return air main pipe 31. Since the return air muffler 32 is arranged on the air intake side of the air handling device 1, it can play a muffler effect on the air flow sent to the box body 11, reducing the size of the box body. The impact of the noise of the fan 13 in 11 on the clean hall through the return air passage. In addition, the return air main pipe 31 is connected to the return air pipe 33 and the fresh air pipe 41 of the fresh air processing device 4 , and the fresh air pipe 41 can provide outdoor fresh air to the air processing device 1 .

A manual air return valve 34 is provided on the air return pipe 33 for adjusting the ratio of the return air volume to the fresh air volume. When the fresh air volume is too small, the manual air return valve 34 is properly closed.

In this embodiment, the installation height H of the air return port 35 is, for example, 0.3m-0.5m, which is convenient for inspection and maintenance, and can also reduce dust and sundries on the ground being sucked into the return air port 35 .

Preferably, the return air outlet 35 adopts an aluminum alloy single-layer fixed louver air outlet, and the design wind speed is not greater than 5m/s, so as to reduce the secondary noise of the return air outlet.

Next, the detailed configuration of the fresh air processing device 4 will be described. The fresh air processing device 4 includes a fresh air outlet 47 , a surface cooling heater 42 and a fresh air pipe 41 sequentially connected along the air flow path. Specifically, the outdoor fresh air enters the fresh air processing device 4 through the fresh air port 47, and is processed through the temperature and humidity adjustment of the surface cooling heater 42 (for example, the outdoor fresh air is cooled and dehumidified in summer, and the outdoor fresh air is heated and heated in winter. processing), and then sent to the return air main pipe 31 through the fresh air pipe 41 and the return air confluence, so as to realize the humidity control of the air sent into the corresponding purification sub-area. The fresh air processing device 4 can be arranged in the structural sandwich wall.

In addition, the surface cooling heater 42 of the fresh air processing device 4 communicates with an air conditioner return water pipe 44 and an air conditioner water supply pipe 46 . The surface cooling heater 42 is available for both winter and summer. In the case of connecting cold water in summer, it can be used as a surface cooler to cool and dehumidify the fresh air flowing through it. In the case of connecting hot water in winter, it can be used as a The heater is used to heat up the fresh air flowing through it.

The surface cooling heater of the fresh air treatment device 4 is used as a cooler in summer to cool and dehumidify the fresh air. The cold source is the chilled water of the air conditioner provided by the outside world, which is usually 7°C water supply and 12°C return water; it is used as a heater in winter , to preheat the fresh air, and its heat source is the air-conditioned hot water provided by the outside world, usually 60°C water supply and 50°C return water.

Preferably, the air-conditioning return water pipe 44 and the air-conditioning water supply pipe 46 are also equipped with an air-conditioning water supply valve 45 and an air-conditioning return water valve 43 respectively. It can also be used to adjust the hydraulic balance of the air-conditioning water system.

The bottom of the surface cooling heater 42 of the fresh air processing device 4 is provided with a drain outlet, and the condensed water is discharged to the floor drain nearby with a drainpipe.

The fresh air outlet 47 of the fresh air processing device 4 is arranged on the outer wall for introducing outdoor fresh air. The fresh air outlet 47 usually adopts an aluminum alloy to fix the louver air outlet. The fresh air of the air-conditioning purification subsystem in structural sandwich wall 1 or structural sandwich wall 2 can be centrally connected to a fresh air main pipe, and then the fresh air main pipe can be connected outdoors to reduce the number of fresh air outlets on the outer wall.

Next, the detailed configuration of the measurement and control device 5 will be described. The measurement and control device 5 includes an environmental parameter detector that detects the environmental parameters of each purification zone, a regulator that regulates and controls the environmental parameters of each purification zone, and a centralized control cabinet 50, wherein the centralized control cabinet 50 is shared by each air-conditioning purification subsystem , that is, the centralized control cabinet 50 can adjust and control the environmental parameters of each purification zone and the corresponding air conditioning purification subsystems.

Among them, the measurement and control device 5 realizes the adjustment and control of the environmental parameters by controlling the regulator according to the environmental parameter design indicators of each purification zone and the detection results of the environmental parameter detectors. Environmental parameter design indicators include design air temperature, design air humidity, design air cleanliness, and design indoor positive pressure. Environmental parameters include air temperature, humidity, suspended particulate matter concentration, and indoor positive pressure. The environmental parameter design index can be preset or set temporarily according to the specific environmental condition requirements of the product to be processed during work.

It should be noted that, in the present invention, cleanliness refers to air cleanliness, and air cleanliness class refers to the concentration of suspended particles greater than or equal to the considered particle size in a unit volume of air in a clean space. The grade standard for dividing by the maximum quantity limit.

The measurement and control device 5 also includes a centralized control cabinet 50 with a display screen, operation buttons, a processor and a memory. The display screen can display the environmental parameters detected by the environmental parameter detector, and the operator or maintenance personnel can set them by operating the operation buttons of the control cabinet. Or adjust the regulator, the processor can feedback control the regulator according to the detection results detected by the detector and the environmental parameter design indicators, and adjust and control the operation of the air treatment device 1, the filter air supply device 2 and the fresh air processing device 4, In this way, various parameters of the airflow sent to each purification zone can be adjusted, and the individual regulation of the environmental parameters and vertical airflow organization of each purification zone can be realized. The memory is used to record the environmental parameters detected by the environmental parameter detector.

The environmental parameter detector of the measurement and control device 5 includes a temperature and humidity sensor (TH) 57 arranged near the return air outlet 35 of the return air device 3 in each purification zone, a suspended particle concentration sensor 58 and an indoor positive pressure sensor 59 arranged in the clean hall .

The regulator of the measurement and control device 5 may include a fresh air regulating valve 51 arranged on the fresh air pipe 41, a water supply regulating valve 53 arranged on the air-conditioning water supply pipe 19 of the surface cooling heater 14 of the air handling device 1, and a water supply regulating valve 53 arranged on the fresh air processing device 4. The water supply regulating valve 52 on the air-conditioning water supply pipe 46 of the surface cooling heater 42, and the air supply regulating valve of the air supply branch pipe arranged on each air supply layer (in the example of FIG. 3 is arranged on each air supply branch pipe. At least one of the wind electric control valves (54, 55, 56).

Specifically, the measurement and control device 5 feedback controls the air conditioning water supply adjustment of the surface cooling heater 14 of the air handling device 1 by responding to the air temperature detected by the temperature and humidity sensor 57 of the purification zone according to the environmental parameter design index of the corresponding purification zone. The opening and closing degree of valve 53, to realize the control regulation of the air temperature of this purification zone; also can come the surface cooling heater 42 of feedback control fresh air treatment device 4 in response to the air relative humidity of this purification zone that temperature and humidity sensor 57 detects The opening and closing degree of the water supply regulating valve 52 to realize the adjustment and control of the air relative humidity of the purification zone; in response to the suspended particulate matter concentration of the purification zone detected by the suspended particulate matter concentration sensor 58, the fan of the corresponding air conditioning purification sub-system is feedback controlled The operating frequency of 13 realizes the adjustment and control of the concentration of suspended particulate matter in the purification zone; in response to the indoor positive pressure of the clean hall detected by the indoor positive pressure sensor 59, the fresh air valve 51 of the fresh air processing device of all air conditioning purification subsystems is feedback controlled Carry out linkage adjustment to realize the adjustment and control of the positive pressure in the clean hall.

It should be noted that the arrangement and type of environmental parameter detectors and regulators are not limited to the above-mentioned embodiments. In the case of measuring the presence or absence of products and the height of products in the clean workshop, it is also possible to set up inductive sensors and The sensor used to measure the height of the product can automatically determine whether the air-conditioning purification subsystem of each purification zone needs to be opened and the number of layers to be opened.

Preferably, the fresh air regulating valve 51 is usually a fresh air electric regulating valve. Under normal operation, the fresh air regulating valve 51 is in an open state. The fresh air regulating valve 51 is in a closed state, so as to reduce the adverse influence of the unfavorable outdoor environmental conditions on the indoor environment.

Next, the method for adjusting and controlling the air temperature of each purification zone by the measurement and control device 5 will be described. The measurement and control device 5 detects the air temperature of each purification zone through the temperature and humidity sensor 57, and feeds back the detection result to the processor in the centralized control cabinet 50 to adjust the air conditioning water supply regulating valve 53 of the air conditioning purification subsystem corresponding to each purification zone Control to realize the individual adjustment and control of the air temperature in each purification zone.

Under summer working conditions, when the temperature and humidity sensor 57 of the purification zone detects that the air temperature of a certain purification zone is higher than the predetermined maximum temperature of the summer working condition, the measurement and control device 5 controls to make the air conditioning purification subsystem corresponding to the purification zone The air-conditioning water supply regulating valve 53 of the air-conditioning device 1 is opened large, and when it is detected that the air temperature is lower than the predetermined minimum temperature in summer working conditions, the measurement and control device 5 controls to make the air-conditioning water supply regulating valve 53 close; When it is detected that the air temperature of a certain purification zone is higher than the predetermined maximum temperature in winter, the measurement and control device 5 controls to close the air conditioning water supply regulating valve 53 of the air treatment device 1 of the air conditioning purification subsystem corresponding to the purification zone When it is detected that the air temperature is lower than the predetermined minimum temperature in winter, the water supply regulating valve 53 of the air conditioner is opened. Through this control method, the air temperature of all purification zones can be independently controlled to meet the different needs of products in different areas of the clean hall for the ambient temperature, realize precise air-conditioning purification, and greatly reduce the energy consumption of air-conditioning operations.

Next, the adjustment and control method of the measurement and control device 5 on the air humidity of each purification zone will be described. The measurement and control device 5 detects the air relative humidity of each purification sub-region through the temperature and humidity sensors 57 of each purification sub-region, and feeds back the detection result to the processor in the centralized control cabinet 50, and the processor controls the fresh air of the air-conditioning purification subsystem corresponding to each purification sub-region. The fresh air air-conditioning water supply regulating valve 52 of the processing device 4 is adjusted and controlled (the opening degree of the fresh air air-conditioning water supply regulating valve 52 is adjusted up or down), thereby realizing the control and regulation of the air humidity of each purification zone.

In summer working conditions, when the temperature and humidity sensor 57 of the purification zone detects that the air relative humidity is higher than the predetermined maximum relative humidity in summer working conditions, the processor controls to make the fresh air treatment of the air conditioning purification subsystem corresponding to the purification zone The air-conditioning water supply valve 52 of the surface cooling heater 42 of the device 4 is opened large, and when the air relative humidity is lower than the minimum relative humidity of the predetermined summer working condition, the processor controls to make the air-conditioning purification subsystem corresponding to the purification zone The air-conditioning water supply valve 52 of the surface cooling heater 42 of the fresh air treatment device 4 is closed small. Through this control method, the air humidity of all the purification zones can be independently controlled to meet the different requirements of the products in different areas of the clean hall on the environmental humidity. Precise air-conditioning purification greatly reduces the energy consumption of the air-conditioning operation; in winter conditions, the indoor air humidity is usually low, so the indoor air humidity is not adjusted for dehumidification, and the air-conditioning water supply valve 52 is fully open to pre-condition the outdoor fresh air. hot.

Next, the method for adjusting and controlling the air cleanliness of each purification zone by the measurement and control device 5 will be described. The measurement and control device 5 can obtain the maximum value of the corresponding suspended particulate matter concentration in the air based on the set value of the air cleanliness of each purification zone, and subtract a certain safety margin to obtain the limit value of the concentration of suspended particulate matter in each purification zone. The measured value of the suspended particulate matter concentration sensor 58 of each purification subregion is compared with the suspended particulate matter concentration limit value of the purification subregion. If the measured value is greater than the suspended particulate matter concentration limit value, then the corresponding air conditioning purification sub-system of the purification subregion is increased. The operating frequency of the frequency converter of the frequency conversion fan 13 of the air treatment device 1 is to increase the air supply volume and reduce the concentration of suspended particulate matter in the air of the purification zone; The operating frequency of the frequency converter of the frequency conversion fan 13 of the air treatment device 1 of the purification sub-system is to reduce the air supply volume, thereby realizing independent control of the air cleanliness of each purification zone.

For example, when the air-conditioning purification system of a clean workshop is in operation, the air volume required for the initial purification stage is large, and the air volume required for the maintenance stage is small. In this embodiment, the fan of the air treatment device 1 adopts a variable frequency centrifugal fan, the initial purification stage adopts power frequency operation, and the maintenance clean stage reduces the frequency operation according to the above-mentioned control method of the air cleanliness of each purification zone, so as to greatly reduce the maintenance of cleanliness. The air-conditioning purification air volume of the stage can greatly reduce the operating energy consumption of the air-conditioning purification system.

Next, the method for adjusting and controlling the positive pressure in the clean hall by the measurement and control device 5 will be described. The measured value of indoor positive pressure in the clean hall detected by the indoor positive pressure sensor 59 is transmitted to the centralized control cabinet 50, and the fresh air regulating valve 51 of the fresh air processing device 4 of all operating air conditioning purification subsystems is controlled by the processor for linkage adjustment (that is, the valve positions of the fresh air control valve 51 of the fresh air processing device 4 of all the air conditioning purification subsystems in operation remain the same), if the measured value of the indoor positive pressure in the clean hall exceeds the set value of the indoor positive pressure, all the valves will be closed simultaneously. The fresh air regulating valve 51 of the fresh air processing device of the running air conditioning purification subsystem; if the measured value of the indoor positive pressure in the clean hall is lower than the set value of the indoor positive pressure, the fresh air processing device of all the running air conditioning purification subsystems will be opened synchronously The fresh air regulating valve 51 realizes the adjustment and control of the positive pressure in the clean hall.

Next, the method for adjusting and controlling the airflow organization of the clean hall by the measurement and control device 5 will be described. The air-supply regulating valves (54, 55, 56) are arranged on the air-supply pipes of each air-supply layer of each air-conditioning purification subsystem, and the air-supply volume of each air-supply layer can be adjusted or closed. For example, if it is judged by manual or sensor that there is no product in a certain purification zone, the air conditioning purification subsystem corresponding to the purification zone will be shut down; if there is a product in a certain purification zone detected by manual or height sensor and the height of the product is lower than the predetermined height, it will be turned off by The control of the operation panel or processor of the centralized control cabinet 50 closes the air supply electric valve of the air supply layer at a height of more than 2m higher than the height of the product, so as to realize the best sub-area and adjustable layered air-conditioning purification effect, and realize Only the precise air-conditioning and purification of the surrounding environment of the product can greatly improve the efficiency of the air-conditioning and greatly reduce the energy consumption of the air-conditioning system.

In this embodiment, the design total pressure of the fan 13 of the air handling device 1 is usually 1000-1200Pa; the sum of the air volumes of the air-conditioning purification devices 1 arranged in all structural sandwich walls is greater than the total design air volume of the air-conditioning purification of the clean hall.

Preferably, clean hoses can be provided at the connections between the main air supply pipe and the air return main pipe and the air handling device 1, so as to block the adverse effects of fan vibration. In addition, the inner wall of the structural sandwich wall is also provided with sound absorption and sound insulation devices to reduce the adverse impact of the noise of the air conditioning treatment device 1 on the factory building through the inner wall of the structural sandwich wall.

In addition, all air-conditioning purification equipment and pipes in the structural sandwich wall are insulated with heat-insulating materials to prevent condensation on the outer surface and reduce air-conditioning cooling or heat loss. Due to the narrow and high space in the structural sandwich wall, and the air handling equipment placed in the middle, if a fire occurs, the flame will spread quickly. Therefore, the thermal insulation materials are all A-level non-combustible thermal insulation materials.

An overhaul channel is also provided beside the high-efficiency filter and the air treatment device 1 in the structural sandwich wall, so as to facilitate the maintenance and replacement of the air treatment device and the high-efficiency filter.

As an alternative, if the clean hall is not provided with a structural sandwich wall, the air-conditioning purification subsystems of the purification partitions of the air-conditioning purification system of the present invention can also be arranged in a decentralized manner outside the side walls of the clean hall of the tall clean workshop. The above examples are only It is used for illustration and should not be construed as a limitation of the present invention.

The distributed air-conditioning and purifying system with meshed sandwich wall of the present invention makes full use of the useless space inside the sandwich wall of the building structure, and does not need to set up a special air-conditioning machine room, which greatly reduces the construction area and civil construction investment, and reduces the area of the machine room by more than 80%; Since the air-conditioning purification equipment is arranged in the sandwich walls on both sides of the clean hall, the size and length of the air-conditioning purification air duct are greatly reduced, and the length can be reduced by more than 80%. The plane layout of the clean workshop is optimized, and the building occupied by the air duct The area is greatly reduced, which also greatly reduces the investment in air-conditioning ducts and the energy consumption of fan transmission; the above-mentioned air-conditioning purification system is widely used, especially suitable for tall clean workshops or super-large clean workshops with sandwich walls and the width of the sandwich walls is greater than 1.5m .

In addition, by adopting the air flow organization form of stratified air-conditioning purification with upper multi-layer side air supply and lower side return air, the clean hall of the clean workshop can achieve the effect of stratified air-conditioning purification, and by turning off the air supply motor on the upper air supply layer The valve can adjust the layered height of the air-conditioning purification layered to meet the different requirements of products with different heights for the air-conditioning purification height. Through the grid-based decentralized air-conditioning purification scheme, the air-conditioning purification of local spaces in high and large spaces can be realized in the horizontal direction. It can achieve precise air-conditioning purification only for the surrounding environment of the product, and can also control different air-conditioning purification environmental parameters for different areas, better meet the use requirements, and greatly improve the efficiency of the air-conditioning, so that the operating energy consumption and electricity costs of the air-conditioning purification system It also improves the guarantee capability of indoor environmental parameters and system reliability.

Explanation of reference signs

1000 air conditioning purification system;

1 air handling unit;

11 boxes;

12 rough filter;

13 centrifugal fans;

14 surface cooling heater;

15 water trays;

16 air conditioning water supply manual valve;

17 Air conditioner return water manual valve;

18 air conditioner return pipe;

19 air-conditioning water supply pipes;

2 filter air supply device;

201 air supply muffler;

202 main air supply pipe;

203 second layer air supply main pipe;

204 third layer air supply main pipe;

205 The first layer of air supply branch pipe;

206 The first layer of high-efficiency air supply filter;

207 The air supply outlet on the first floor;

208 second-layer air supply branch pipe;

209 The second layer of high-efficiency air supply filter;

210 second layer air supply outlet;

211 third-layer air supply branch pipe;

212 The third layer of high-efficiency air supply filter;

213 The air outlet on the third floor;

3 return air device;

31 return air main pipe;

32 Return air muffler;

33 return air duct;

34 air return valve;

35 return air outlet;

4 fresh air treatment device;

41 new air duct;

42 fresh air meter cooling heater;

43 air conditioner return water manual valve;

44 air conditioner return pipe;

45 air conditioning water supply manual valve;

46 air-conditioning water supply pipes;

47 fresh air outlet

5 measurement and control device;

50 centralized control cabinets;

51 fresh air regulating valve;

52 fresh air air conditioning water supply regulating valve;

53 Air conditioning water supply regulating valve;

54 The first layer of air supply regulating valve;

55 second layer air supply regulating valve;

56 third layer air supply regulating valve;

57 corresponds to the temperature and humidity sensor of the purification partition;

58 corresponds to the suspended particle concentration sensor of the purification zone;

59 Indoor positive pressure sensors in clean halls.

Claims (10)

1. A decentralized air-conditioning purification system (1000) for tall and large clean workshops, the clean hall of the workshop is divided into a plurality of purification sub-regions in the horizontal direction by a planar grid, and the air-conditioning purification system includes the following: A plurality of air-conditioning purification sub-systems (S1 to S12) arranged in a distributed manner in a one-to-one correspondence manner among the plurality of purification sub-areas, wherein each of the air-conditioning purification sub-systems includes: An air treatment device (1), comprising a coarse-effect filter (12) sequentially arranged on the air flow path, a fan (13) for pressurizing the airflow, and a surface cooling heater (14); Filter air supply device (2), which is located downstream of the air flow path of the air handling device, and includes two or more air supply layers (L1, L2, L3) arranged at different heights, each air supply layer Including high-efficiency filters (206, 209, 212) and air supply ports (207, 210, 213) communicating with corresponding purification partitions; The return air device (3), which is located upstream of the air flow path of the air treatment device, and includes a return air main pipe (31) connected to the air treatment device and a return air outlet (35) arranged in the corresponding purification subregion; The fresh air processing device (4), which is located upstream of the air flow path of the return air device, communicates with the outdoor fresh air on the air inlet side, and includes a fresh air pipe (41) communicated with the return air pipe (33) on the air outlet side and The fresh air meter cooling heater (42) on the fresh air pipe is set; A measurement and control device (5), which includes an environmental parameter detector (57 to 59) for detecting the environmental parameters of the purification zone and a regulator (51 to 56) for adjusting and controlling the environmental parameters of the purification zone, Wherein, the regulator includes a fresh air regulating valve (51) arranged on the fresh air pipe, a water supply regulating valve (53) arranged on the cold/hot water flow path between the surface cooling heater of the air handling device and the cold/hot water source. ), the water supply regulating valve (52) arranged on the cold/hot water flow path between the fresh air meter cold heater of the fresh air treatment device and the cold/hot water source, and the air supply regulating valve arranged on the air supply pipes of each air supply layer (54, 55, 56), the measurement and control device separately adjusts the environmental parameters of each purification zone by controlling the regulator according to the environmental parameter design index of each purification zone and the detection result of the environmental parameter detector. 2. The air conditioning purification system according to claim 1, wherein, Along the horizontal direction of the clean hall, divide it into two rows with the midline of the short side as the boundary, and divide it into K columns evenly along the longitudinal direction of the clean hall with a distance of 5m to 8m or the midline position of the structural column, thus forming 2K Purification partitions with basically the same volume, In addition, there are structural clamping walls on both sides of the long side of the clean hall of the workshop, and the plurality of air-conditioning purification subsystems are distributed in the structure clamping walls near the corresponding purification zones in a one-to-one correspondence with the multiple purification zones. inside the wall. 3. The air conditioning purification system according to claim 1 or 2, wherein said environmental parameter design index comprises design air temperature, design air humidity, design air cleanliness and design indoor positive pressure, and said environmental parameter comprises air temperature , humidity, suspended particulate matter concentration and indoor positive pressure. 4. The air conditioning purification system according to claim 3, wherein, The environmental parameter detectors include a temperature and humidity sensor (57), a suspended particulate matter concentration sensor (58), and an indoor positive pressure sensor (59) arranged in the clean hall, which are arranged near the return air outlet of the return air device in each purification zone . 5. The air-conditioning purification system according to claim 3, wherein, said measurement and control device carries out the following regulation and control to the environmental parameters of each purification subregion according to the environmental parameter design index or service requirements of each purification subregion: In response to the air temperature detected by the temperature and humidity sensor of the corresponding purification sub-region, adjust the opening degree of the water supply regulating valve of the surface cooling heater of the air-handling device corresponding to the air-conditioning purification subsystem corresponding to the purification sub-region to adjust the opening degree of each purification sub-region The air temperature is independently regulated; In response to the air relative humidity detected by the temperature and humidity sensor corresponding to the purification sub-area, adjust and control the opening degree of the water supply regulating valve of the fresh air surface cold heater of the fresh air treatment device of the air-conditioning purification subsystem corresponding to the purification sub-area, so that each purification The relative humidity of the air in the partition is independently regulated; Adjusting and controlling the fan operating frequency of the air-conditioning purification sub-system corresponding to the purification zone in response to the suspended particulate matter concentration detected by the particle concentration sensor corresponding to the purification zone, so as to independently regulate the concentration of suspended particulate matter in each purification zone; In response to the indoor positive pressure sensor detecting the positive pressure in the clean hall, adjust and control the fresh air control valves of the fresh air processing devices of all air-conditioning purification subsystems for synchronous adjustment, so as to adjust and control the positive pressure in the clean hall. 6. The air-conditioning purification system according to claim 1 or 2, wherein, the quantity of the two or more air-supply layers and the height of the air-supply layers of each corresponding purification partition are based on the height and The maximum height of the product in each corresponding purification zone is determined, and the air supply pipe of each air supply layer is equipped with an electric control valve to adjust the air supply volume. 7. The air-conditioning purification system according to claim 1 or 2, wherein the air treatment device further comprises: The box body (11), which accommodates the coarse-effect filter (12), the fan (13), the surface cooling heater (14) installed obliquely in the box body, and the surface cooling heater installed below the surface cooling heater on the side wall of the box body A water collecting tray (15) for receiving air-conditioning condensed water; The air conditioner return water pipe (18) communicated with the surface cooling heater; and Air conditioner water supply pipe (19), Wherein, an air conditioner water supply valve (16) and an air conditioner return water valve (17) are respectively arranged on the air conditioner return water pipe and the air conditioner water supply pipe. 8. The air-conditioning purification system according to claim 1 or 2, wherein the air supply port of the filter air supply device adopts an aluminum alloy spout air supply port with adjustable air supply direction, and the horizontal distance between two adjacent air supply ports is 2 to 3m, and the design wind speed of the air outlet is 10 to 15m/s. 9. The air-conditioning purification system according to claim 1 or 2, wherein the blower fan (13) of the air treatment device is a variable frequency centrifugal fan, and the measurement and control device is adjusted by the frequency conversion of the blower fan to stabilize the concentration of suspended particulate matter in the corresponding purification subregion at the set point. Fixed value, when the concentration of suspended particles exceeds the set value, increase the operating frequency of the fan, otherwise, reduce the operating frequency of the fan. 10. The air-conditioning purification system according to claim 1 or 2, wherein the air supply outlets of the filtering air supply device are arranged in layers on the inner wall of the structural sandwich wall, on the wall above the return air outlet.

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