JPS6153099B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to ventilation and air conditioning systems, and more particularly to systems for purifying contaminated air and supplying clean air to an enclosed space.

The present invention can be applied to a device that biologically purifies contaminated air and supplies clean air, such as sterile air for treatment, to a closed space.

A device that purifies contaminated air and supplies clean air to hospital wards (“Konditsionirovanie vozdukha” published by EE Karpis in 1975).
Figures 12 and 22 of “Vbolnitsakh” “Ward Air Conditioning”
(see figure) is known to consist of a fan with an intake duct and a pressurized air duct, and a germ filter.

Eliminating noise stimulation is a major requirement for hospital rooms. Therefore, in order to provide the necessary auditory comfort, this known device has a noise-absorbing material that can be fitted inside the air duct, and for which the fan is separated from the room in which it is used. It is preferable that it be installed in a certain position.

In hospital wards, high demands on the level of auditory comfort lead to excessive dimensions and shapes of noise suppressors. The known devices described above therefore have excessive size and weight. It should be noted that the noise is primarily generated by the fan and propagates through the intake air and pressurized airflow as well as leaking outside the fan.

These airflow noises are commonly referred to as aerodynamic noise.

“Atlas” known by the trademark “Superquiet Air”
A device from the company "Copko AB" for purifying contaminated air and supplying clean air to closed spaces is further known (see the book "Borba's" by LF Lagunov in 1977)
(See "Noise Control of Compressor Equipment"). Hereinafter, this will be referred to as a "known device."

This known device consists of a sound-proof housing with a hollow sound-insulated wall, having a port for admitting contaminated air and a port for discharging clean air, and a blower mounted inside the housing. . The passage formed in the wall is used as an intake duct. Additionally, the soundproof housing is adapted to suppress noise generated by the blower.

To achieve the required auditory comfort,
In the known device, an additional noise suppressor is provided which can be installed one after the other in the intake duct. This configuration of the known device is structurally too complex, but makes it possible to achieve acceptable overall dimensions.

Also known is a device for purifying contaminated air and supplying clean air (see Soviet inventor's certificate number 939010), consisting of a soundproof housing with ports for admitting contaminated air and for discharging clean air. There is. The housing is sound insulated by lining its inner walls with known sound absorbing materials.
A sound insulating partition is provided inside the housing and separates the housing into an upper and a lower chamber. The lower chamber houses the fan, for which
The upper chamber has a high performance air filter.

In the above-mentioned known device, the intake duct and the pressure air duct are configured in the hollow, sound-insulated wall of the housing. The interior between the walls is separated by a diaphragm into two isolated air ducts. One of these air ducts, in particular the intake duct, communicates on the one hand with a port for admitting contaminated air and on the other hand with the lower chamber. The pressure air duct communicates with the pressure conduit of the fan and the upper chamber of the housing.

The inlet of a high-performance filter located in the upper chamber communicates with said upper chamber, whereas the outlet of the high-performance filter communicates with a port for discharging clean air.

Thus, two passages for the movement of air are formed in the known device by the above-mentioned structural features, these flow paths being: namely: (1) an intake air flow extending from a port for admitting contaminated air to an intake duct in the hollow, sound-insulated wall of the housing and through the lower chamber of the housing to the intake conduit of the fan; and (2) a pressure channel extending from the pressure conduit of the fan through a pressure air duct, an upper chamber, and a filter in the hollow, sound-insulated wall of the housing to a port for discharging clean air.

Due to the lack of special air ducts, the overall dimensions of the device described above can be reduced considerably.

The walls of the housing are lined with sound-absorbing material.
An intake duct and a pressure air duct are formed, so that these air ducts act as a suppressor of the aerodynamic noise generated by the air flow sucked in and pumped by the fan.

The above-described noise suppressors, commonly referred to as active noise suppressors, act to absorb the acoustic vibrational energy of the airflow through the walls of the air duct. Other things being equal, the efficiency of the noise suppressor is determined by the length of the air duct.

In the known device mentioned above, the upper and lower chambers, as well as the walls of the housing, are lined with sound-absorbing material. These chambers are arranged in sequence along the air travel path to serve as a second noise suppression stage. Such a noise suppressor is generally referred to as a reactivated noise suppressor, and its effect is determined when the velocity of the air path entering one of the chambers via the air duct is suddenly reduced. The purpose is to absorb the energy of acoustic vibrations of airflow within the room.

In addition to reducing the aerodynamic noise generated by the airflow, the soundproof housing of the device acts to suppress the noise generated by the operation of the fan.

As a result, a device for purifying contaminated air and supplying clean air to an enclosed space ensures sufficient auditory comfort with a device of relatively small overall size and weight.

However, in order to obtain an intake duct of sufficient length and a pressure air duct to provide efficient noise suppression, it is necessary to make the walls of the housing of the known device entirely hollow, and this The goal is to increase Such a construction of the housing makes it impossible to limit the overall dimensions of the device for purifying contaminated air and supplying clean air.

Furthermore, the hollow walls of the known devices described above extend the length of the diaphragm separating the pressure air duct and the intake duct to the extent that the size and weight of the device can be accommodated.

The operating conditions also require that the membranes or diaphragms separating the hollow sound-insulating walls must be carefully sealed. The extended length of the diaphragm secured around the upper and lower chambers complicates installation and may cause substantial leakage from the pressurized air duct to the intake duct. The aforementioned structural features of the known device are:
It's inconvenient.

Additionally, the lower hollow part of the housing of known devices is not sufficiently rigid, which affects the vibro-acoustic properties of the device.

The invention therefore relates to a device for purifying contaminated air and supplying clean air to a closed space, which device is simple in construction, small in size and achieves high auditory comfort. It is configured as follows.

An object of the present invention is to provide a device for purifying contaminated air and supplying clean air to a closed space, wherein a soundproof housing has a port for introducing contaminated air and a port for discharging clean air. a sound-insulating partition separating the housing into an upper and a lower chamber, one such chamber housing a fan, said fan being formed in a partially hollow wall of the sound-insulating housing for admitting clean air; The chamber communicates with an intake duct communicating with the inlet port and further communicates with a pressurized air duct, the other chamber housing a filter, the inlet of said filter communicating with the pressurized air duct, and the outlet of said filter discharging clean air. According to the invention, in said device, the soundproof housing comprises a further soundproof bulkhead, said bulkhead for forming a passageway serving as a pressurized air duct. a wall of the intake duct and the pressurized air duct, arranged substantially parallel to and spaced apart from the first sound-insulated partition, so as to form a labyrinth for the air flowing through these ducts; This is achieved by a device characterized in that the device further comprises a member attached to the.

The device with the aforementioned intake duct and pressurized air duct, which purifies contaminated air and supplies clean air into an enclosed space, ensures a sufficiently high vibroacoustic comfort and is superior to devices according to the prior art. It is also structurally uncomplicated, light in weight, and small in overall dimensions.

The device according to the invention is applicable for use in hospitals or clinics due to the low level of noise generated by the device during operation and the relatively small size of said device.

The device can be installed both inside and outside the hospital ward without irritating patients or staff with vibroacoustic discomfort. The device is also advantageous because it occupies a small amount of floor space.

The present device embodying features of the invention may alternatively be equipped with a relatively bulky HEPA-type bacterial filter used to purify contaminated air and provide clean air without being specially equipped. Even when used in hospital wards, it can be configured as a portable mobile device.

The above-mentioned features of the invention and other resulting advantages will become more fully apparent from a consideration of specific embodiments described below with reference to the accompanying drawings.

The device according to the invention purifies air and supplies clean air to an enclosed space, as shown in FIG. Become.

The soundproof housing 1 accommodates the various elements described below in a processing sequence and is designed to protect the enclosed space from the noise and vibrations associated with the operation of the device for purifying the air to be supplied to the enclosed space. It's getting old.

The housing 1 has a casing 4 of known and suitable box-shaped construction. The structure of housing 1 is
The inside is lined with a known suitable sound absorbing material 5.

A filter 6 of known suitable construction for pre-cleaning contaminated air is installed at the inlet port 2 in a known conventional manner.

The housing 1 houses a horizontal partition 7 which is sound insulated on both sides and separates the housing 1 into an upper chamber 8 and a lower chamber 9. The sound insulation material (not shown) of the partition wall 7 is the same as the sound insulation material of the housing 1 described above.

A fan 10 of suitable known design is placed in the lower chamber 9. Fan 10 is adapted to draw in contaminated air through port 2, pump the air toward the components of the apparatus described below, and discharge clean air through outlet port 3 into the enclosed space in use.

A suction or intake duct 11 is provided in the lower chamber, which is constituted by a hollow lower wall 12 of the housing 1. In order to structurally form the interior of the intake duct 11, the housing 1 has a sound-insulating inner wall 13 which is arranged substantially parallel to the wall 12 and spaced apart from the wall 12 by a certain distance. There is.

The fan 10 is mounted on the lower inner wall 13 by a vibration damping support 14 of known suitable construction.

The intake duct 11 communicates with the air inlet port 2 via a passage 15. The passage 15 is sound insulated similar to the previously described sound insulated elements of the housing 1.

The intake duct 11 is connected to a port 16 made in the wall 13.
It communicates with the lower chamber 9 via.

A pressurized air duct 17 adjoins the lower chamber 9 above. Pressurized air duct 17 is adapted to convey air from fan 10 to filter 18 for final cleaning. The structure of the air duct 17 will be explained later in this description.

The final cleaning filter 18 located in chamber 8 is of any known and suitable design.

Any conventional HEPA type (high efficiency particulate filter) bacterial filter may be used as filter 18 for therapeutic purposes.

The inlet 19 of the filter 18 communicates with the pressurized air duct 17 via the upper chamber 8 .

An outlet 20 of filter 18 communicates with outlet port 3 for discharging clean air from housing 1 . Adapter 21 of any suitable construction
using outlet 20 of filter 18 and port 3
It is good to communicate with In the device for purifying air and supplying air to a closed space, this adapter 21 is formed as a ventilation tube provided at the connection position with the outlet 20 of the filter 18 by means of a seal of known suitable construction. It's good to be able to do it.

The filter 18 is fixed in position inside the chamber 8 by means of fasteners 23 suitable for the purpose.

The location where the adapter 21 penetrates the wall of the housing 1 is sealed in a known manner, such as by welding (not shown).

The wall 8a of the chamber 8 can be removed from the housing 1 to facilitate the installation of the filter 18. The removable structure of this wall portion 8a will not be described in detail, since this is not relevant to the gist of the invention.

In order to reduce the overall size of the device, only a portion of the wall of the housing 1 is hollow. As explained above, the lower hollow wall 12 constitutes the intake duct 11 together with its sound insulating material.

The housing 1 is separated from the sound-insulated bulkhead 7 by another bulkhead 24 in order to form a passageway (not indicated by reference numeral) serving as a pressurized air duct 17.
This partition wall 24 is sound insulated on both sides,
It is attached approximately parallel to the partition wall 7 at a certain distance therefrom.

The distance between the partition walls 7 and 24 is selected depending on the acoustically acceptable velocity of the air flow in the air duct 17, and the distance between the walls 12 and 13 is likewise selected depending on the velocity of the air flow in the duct 17. The selection will be made accordingly.

The pressurized air duct 17 communicates with the chamber 8 via a port 25 and with a pressure port (not shown with a reference number) of the fan 10 via a conduit 26.
The conduit 26 is of any known suitable construction made of vibration damping material to prevent the transmission of vibrations from the fan 10 to the housing 1. A port 26a is made in the bulkhead 24 at the location where the conduit 26 is connected to the pressurized air duct 17.

As previously explained, air ducts 11 and 1
7 is lined with a sound absorbing material 5 which serves as an active noise suppressor. The ability of these noise suppressors is determined by their length. For this purpose, the housing 1 has elements 27 which are fixedly attached to the walls 12 and 13 of the intake duct 11 and to the partitions 7 and 24 which serve as walls of the pressure air duct 17.

The member 27 has the form of a flat bulkhead and is lined with sound-absorbing material 5 in any known suitable manner so as to form a moving labyrinth of air flow.
1 and 17. In the pressurized air duct 17, the air flow moves through a labyrinth from port 26a to port 25 as shown in FIG. 2, and in the intake duct 11 from passage 15 to port 16 as shown in FIG.

Distance between two adjacent members and air duct 1
The distance between the outermost member of housing 1 and the closest wall of housing 1 is approximately equal to that calculated according to the acoustically permissible velocity of the air flow.

Said member 27 is installed in the air duct 17 in a similar manner.

Alternatively, member 27 may be zigzag in configuration (not shown).

A rigid connection between the member 27 and the walls 12, 13 of the air intake duct 11 and a rigid connection between the member 27 and the walls 12, 13 of the air intake duct 1
The rigid connection of 7 with the walls 24, 7 makes the rigidity of the housing 1, especially its bottom part (not indicated by reference numeral) very high, and ensures the suppression of the vibrations generated by the fan 10.

An apparatus embodying features of the invention for purifying air and providing clean air to an enclosed space operates as follows.

Contaminated air is sucked in from the air cleaning preliminary filter 6 by the fan 10. After filter 6, the air from which large contaminant particles have been removed is passed through passage 1.
5. The labyrinth formed by the member 27 in the intake duct 11 and the port 16 are continuously conveyed to the lower chamber 9. Air is drawn from chamber 9 by fan 10 and pumped along conduit 26 for subsequent processing.

The aerodynamic noise generated by the air being sucked is therefore suppressed in two stages, more specifically first with an active noise suppressor, i.e. in the intake duct 11 with an airflow labyrinth. It is then suppressed in the reactivation noise suppressor or chamber 9.

The noise generated by the fan 10 is suppressed by the soundproof housing 1, and in particular by the lower chamber 9 of the housing 1, which accommodates the fan 10.

Air pumped by fan 10 along conduit 26 passes from port 26a to pressure duct 17.
transported to. Following travel through the labyrinth of pressure ducts 17, air is admitted into the upper chamber 8 through ports 25. Air is pumped from chamber 8 through inlet 19 to filter 18 .

After being filtered, the air flows along the funnel-shaped vent 21 toward the outlet port 3 and is then supplied to an enclosed space, such as a hospital room. Suppression of the aerodynamic noise generated by the pumped air flow, similar to the suppression of the noise resulting from the intake air, takes place in two stages, more specifically, first the active noise suppressor, i.e. the air flow labyrinth. and then in the reactivation noise suppressor, i.e. in the chamber 8.

The high stiffness of the lower wall 12 of the housing 1, in conjunction with the vibration damping support 14 and the vibration suppression conduit 26, minimizes vibrations of the device for cleaning contaminated air and supplying clean air to an enclosed space. .

A device embodying features of the invention was manufactured to meet the required rate of volume of supplied air (50 m ³ /hr to 300 m ³ /hr) and successfully passed testing.

The noise from the fan was reduced from the initial level of 75db to a relatively low vibration of 35db.

In view of the above, the present invention provides for clinical purposes;
In particular, this device can be used to purify contaminated air and supply clean air to a ward or treatment room for treatment of burns or trauma to the hands and feet.

When the present invention is installed inside or outside a hospital room,
Do not allow the patient to experience noise stimulation.

[Brief explanation of the drawing]

1 is a vertical sectional view of an apparatus according to the invention for purifying contaminated air and supplying clean air to an enclosed space; FIG. 2 is a sectional view taken along the - line in FIG. 1; FIG. 3 is a sectional view taken along the - line in FIG. 1. Table of reference numbers used in the drawings, 1...Soundproof housing, 2...Inlet port for admitting contaminated air, 3...Outlet port for discharging clean air, 4...Casing, 5...Sound absorbing material, 6... Filter, 7... Partition wall, 8... Upper chamber, 9... Lower chamber, 10... Fan, 11... Intake duct, 1
2...Wall, 13...Wall, 14...Support, 15...
... Passage, 16 ... Port, 17 ... Pressure air duct, 18 ... Filter, 19 ... Filter inlet, 20 ... Filter outlet, 21 ... Funnel-shaped ventilation opening, 22 ... Seal, 23 ... Fastener, 2
4... Bulkhead, 25... Port, 26... Conduit, 2
6a... port, 27... member.

Claims (1)

[Claims] 1 A soundproof housing 1 has a port 2 for admitting contaminated air and a port 3 for discharging clean air, and is provided with a soundproof partition 7 separating the housing 1 into an upper chamber 8 and a lower chamber 9; One such chamber 9 houses a fan 10, said fan 10 being connected to the partially hollow wall 1 of the soundproof housing 1.
The other chamber 8 accommodates a filter 18, which communicates with an intake duct 11 which is formed in 2 and communicates with the inlet port 2 for admitting clean air, and further communicates with a pressure air duct 17. The outlet 20 of said filter communicates with a pressurized air duct 17 and has a port 3 for discharging clean air.
In the apparatus for purifying contaminated air and supplying clean air to an enclosed space, the soundproof housing 1 comprises another soundproof partition 24, communicating with the
This bulkhead 24 is connected to the sound-insulated bulkhead 7 in order to constitute a passage serving as a pressurized air duct 17.
The walls 12,1 of the intake duct and the pressure air duct 11,17 are placed substantially parallel to each other at a certain distance from the
A device for purifying contaminated air and supplying clean air to a closed space, characterized in that a member 27 is attached to 3, 7, and 24 so as to form a labyrinth through which air passes.