RU2303200C2 - Device for ventilation of clean rooms - Google Patents

Abstract

FIELD: air conditioning or ventilation.

SUBSTANCE: device comprises corner, column-like, and near-column exhaust panels for removing air from the near-floor zone of the clean room through the pressure-tight ceiling chamber by means of a recirculation fan. One portion of the removed air is directed back to the clean room and is mixed with the cleaned conditioned outdoor inflowing air, and the other portion of removed air is directed to the adjacent clean room and is removed by means of exhaust fan. The lowered static pressure in the intermediate zone with respect to the static pressure in the clean zone is provided by the fine filter mounted in the by-pass opening made in the baffle between the ceiling chamber of the clean room and intermediate zone. The forced air supplied to the clean room flows to the auxiliary rooms under the action of static pressure generated by the forced air through the ventilation valve-distributor. The forced air flows from the clean room to the auxiliary room through the intermediate room and unit of ventilation valve-distributors.

EFFECT: improved quality of air cleaning.

5 cl, 2 dwg

Description

The invention relates to pharmaceutical, medical and microbiological technology.

A known construction of a box for working with highly pure substances, containing a horizontal rectangular housing of the working chamber, additional chambers with perforated side walls located on the front wall of the housing, to which exhaust ventilation pipes are connected (SU 867411 A, P.S. Malyutenkov, etc., 09/30/81).

The disadvantage of this design is that it does not completely solve the complex problem of the reliability of environmental protection from technological emissions and the cleanliness of the working area.

Another well-known technical solution is the construction of rooms for working with radioactive substances, containing a equipment zone, a repair and transportation zone, an operator area (V. M. Krupchatnikov “Ventilation when working with radioactive substances”, Moscow: Atomizdat, 1968).

The main disadvantage of this technical solution is the non-sterility of the process.

The closest in essence to the invention is an isolated cleanroom containing the enclosing structures of the existing building, a supply and exhaust ventilation system with fine filters, a gray (transitional) zone, a perforated raised floor, collapsible building structures, a transitional vestibule, a clean zone, a perforated suspended ceiling, and a ceiling a chamber, a locking and regulating air distributor (RU 2017525 C1, L.V. Arzamastseva et al., March 31, 1992).

This design of an isolated cleanroom has several disadvantages:

- the complexity of the design of cleanrooms (perforated raised floor, perforated suspended ceiling, ventilation duct system);

- the remoteness of the supply ventilation filter of fine cleaning from the clean zone;

- lack of exhaust ventilation system serving transitional vestibule;

- high energy costs for the operation of supply and exhaust ventilation systems;

- lack of reuse of cleanroom air;

- transportation of the entire volume of technological ventilation air from clean rooms in the cavity of the transition (gray) zone;

- the high cost of an air conditioner serving clean rooms, according to the required performance.

The objective of the invention is to ensure a guaranteed differential pressure between the working clean zone and the transition zone, to protect the surrounding atmosphere from the possible release of process air outside the transition zone and protect the clean room from the ingress of pollution.

The essence of the invention is as follows.

The technological unit of cleanrooms contains the building envelope of existing buildings, a clean room for staff training (second wardrobe), a clean room for an airlock, clean production rooms, a working area for clean rooms, auxiliary rooms, a transitional (gray) zone, an exhaust ventilation system with fine filters , air conditioning system, throttling valves, vent valves, closers, ducts, collapsible building envelopes ruktsii, including walls, ceilings, installed inside the enclosing structures of existing facilities, ceiling camera in a clean room ceiling filter chamber. In this case, the air is removed from the clean room through its corner exhaust ventilation panels, which simultaneously play the role of corner fillets, the plane of the corner exhaust panel and the corner building envelope collapsible structures form the cavity of the triangular shape duct, the upper part of which communicates with the cavity of the hermetically sealed ceiling chamber of this clean room , in its lower part on the plane of the corner exhaust panel, adjustable air intake devices are installed, through which the air removed from the lower (floor) zone along the triangular cavities of the corner exhaust panels is taken by the fan through the cavity of the sealed ceiling chamber, after which, after being processed in the closer, it is distributed in two directions through the ceiling filter chambers, one part of it is sent back to the serviced ( primary) clean room and mixes in it with clean air-conditioned outdoor supply air, and the other part enters the neighboring (secondary) clean room.

In addition, inside the cleanroom unit around the support columns, to its entire height, exhaust ventilation side panels are installed with a gap, the upper cavity of which communicates with the cavity of the sealed ceiling chamber of this cleanroom, and air intake adjustable devices are installed in the lower part of them.

In addition, in the cleanroom unit, in order to ensure large multiplicity and uniform distribution of air over the entire area of cleanrooms, air is removed from the floor area of cleanrooms through sealed exhaust ventilation columnar panels evenly installed throughout the entire area of these rooms, the upper part of the cavity of exhaust columnar panels communicates with the sealed cavity of the ceiling chamber, air intake devices are installed in the lower part of the column-shaped exhaust panels.

In addition, in the cleanroom unit, in order to maintain the normative difference in static pressure between the clean working and transition (gray) zones, the cavity of the sealed ceiling chamber communicates with the transition zone through the transfer hole in the partition between them, protected by a fine filter.

In addition, in the cleanroom unit, in the overflow aperture of the partition between the cavity of the sealed ceiling chamber of the cleanroom and the auxiliary room, a ventilation valve-distributor is installed that automatically maintains the normative excess pressure of the supply air entering the cleanroom and ensures that it flows into the auxiliary rooms through a shut-off and adjustable device vent valve.

In addition, in the cleanroom unit, the supply air from the cavity of the sealed ceiling chamber of the cleanroom enters the auxiliary rooms through the tambour and the block of ventilation valves, one of which is installed in the overflow hole of the partition between the sealed ceiling chamber of the clean room and the tambour room, the other in the overflow openings of the partition between the vestibule room and the auxiliary room.

Figure 1 shows a cross section AA of a General view (plan) of the technological unit of cleanrooms. Figure 2 shows a plan of a General view - section BB.

The technological unit of cleanrooms contains enclosing building structures of the existing premises 1; clean room for staff training (2nd wardrobe) 2; clean room of the air lock 3; (primary) cleanroom 4; auxiliary room 5; transitional (gray) zone 6; exhaust fan 7; fine filter of the removed process air 8; air conditioning system 9; throttling valves 10; ventilation distribution valves (WRC) 11; closer 12; air ducts 13; folding walls 14; tight suspended ceilings 15; sealed ceiling chambers 16; ceiling filter chambers 17; exhaust ventilation corner panels 18; the cavity of the ducts of a triangular shape of the exhaust corner panel 19; adjustable air intake devices 20; recirculation fan 21; fine filter overflow filter 22; column 23; exhaust ventilation near-face panel 24; neighboring (secondary) cleanroom 25; fine filter overflow port 26; valve transfer port WRC 27; vestibule 28; exhaust ventilation columnar panel 29.

The principle of operation of the technological unit is as follows. The external supply air from the air conditioning system 9 is directed through the air ducts 13 to clean rooms 2, 3, 4, having passed the volumetric speed adjustment in the throttle valves 10. One part of it, having undergone fine cleaning and uniform air distribution in the ceiling filter chamber (PFK) 17, enters the upper part of the working area of the primary cleanroom 4, while mixing with the recirculated air coming from the recirculation fan 21 through the PFC.

The resulting mixture of clean ventilation air, moving uniformly from top to bottom, reaches the floor level of the clean working area, from where it is removed through adjustable air intake devices 20 along the triangular cavities 19 of the corner exhaust panels 18, as well as through the air intake devices 20 of the exhaust side panel 24, a recirculation fan 21, communicating with them through the cavity of the sealed ceiling chamber 16. Then the mixture of air from the recirculation fan 21, after being processed in the closer 12, partially returns I primary cleanroom 4 where it is mixed with a new portion of fresh outdoor air. The remaining air mixture is sent by the fan 21 to the neighboring (secondary) cleanroom 25 through the ceiling filter chamber 17, from which it flows uniformly through the cavity of the working clean zone from top to bottom, through the air intake devices 20 through the exhaust angular 18 and columnar panels 29 through the sealed ceiling the chamber 16 is removed by the fan 7. The removed process air, if necessary, is additionally cleaned in fine filters 8.

One of the following parts of the supply air from the air conditioner 9 enters the ceiling filter chamber 17 of the clean room of the air lock 3, from where it flows downward evenly to the air intake devices 20, through which the static pressure of the supply air supplied to the lock 3 moves through the triangular ducts 19 of the corner panels 18 in a sealed ceiling chamber 16. Through the valve WRC 11, the supply air from the chamber 16 moves into the cavity of the vestibule 28, and from it through another valve WRC 11 enters the auxiliary 5 for its further use as supply ventilation air.

The third part of the supply air from the air conditioner 9 enters the ceiling filter chamber 17 of the clean room for the training of personnel 2, passes through its entire volume from top to bottom, and through the air intake devices 20, through the triangular corner ducts 19 of the corner panels 18, it is transported by the static pressure of the supply air into the airtight cavity chamber 16, from which through the valve WRC 11 the supply air enters the auxiliary room 5 for its further use as supply ventilation air for General purpose communications.

Claims (6)

1. Technological unit of clean rooms, containing building envelope for existing buildings, clean room for staff training (second wardrobe), clean room for the air lock, clean production rooms, working area for clean rooms, auxiliary rooms, transitional (gray) zone, exhaust ventilation system with fine filters, air conditioning system, throttling valves, ventilation valves - distributors, closers, air ducts, collapsible building envelopes structures, including walls, suspended ceilings installed inside the building envelope of the existing premises, ceiling chambers in clean rooms, ceiling filters - chambers, characterized in that the air is removed from the clean room through its corner exhaust ventilation panels, which simultaneously play the role of corner fillets, the plane of the corner exhaust panel and the corner enclosing building collapsible structures form a cavity of a triangular shape duct, the upper part of which communicates with the cavity of the hermetically sealed ceiling chamber of this clean room, in its lower part, on the plane of the corner exhaust panel, adjustable air intake devices are installed through which air removed from the lower (floor) zone along the triangular cavities of the corner exhaust panels is taken by the fan through the cavity of the sealed ceiling chamber, after which, having passed the processing in the closer, it is distributed in two directions through the ceiling filter - chambers, one part of it is sent back to the service emoe (primary) clean room and mixed therein with a clean conditioned fresh air outside, and the other part enters into an adjacent (secondary) cleanroom. 2. The cleanroom unit according to claim 1, characterized in that around the support columns to its entire height inside the cleanroom there are installed exhaust ventilation side panels with a gap, the upper cavity of which communicates with the cavity of the sealed ceiling chamber of this cleanroom, and in the lower part air intake adjustable devices installed. 3. The cleanroom unit according to claim 1, characterized in that in order to ensure large multiplicity and uniform distribution of air over the entire area of cleanrooms, air is removed from the floor area of cleanrooms through sealed exhaust ventilation columnar panels uniformly installed over the entire area of these rooms, the upper part of the cavity of the column-shaped exhaust panels communicates with the sealed cavity of the ceiling chamber; the air intake devices are installed in the lower part of the column-shaped exhaust panels Twa. 4. The cleanroom unit according to claim 1, characterized in that in order to maintain a standard differential pressure of static pressure between the clean working and transition (gray) zone, the cavity of the sealed ceiling chamber communicates with the transition zone through the transfer hole in the partition between them, protected by a fine filter. 5. The cleanroom unit according to claim 1, characterized in that in the transfer aperture of the partition between the cavity of the sealed ceiling chamber of the cleanroom and the auxiliary room a ventilation valve is installed - a distributor that automatically maintains the normative overpressure of the supply air entering the cleanroom and ensures its flow into auxiliary rooms through a shut-off and adjustable device of the ventilation valve - distributor. 6. The cleanroom unit according to claim 1, characterized in that the supply air from the cavity of the sealed ceiling chamber of the cleanroom enters the auxiliary rooms through the tambour and the block of ventilation valves, distributors, one of which is installed in the overflow hole of the partition between the sealed ceiling chamber of the cleanroom and a vestibule room, another in the transfer hole of the partition between the vestibule room and the auxiliary room.

Images