JP2011083219A - Ventilation system in ventilation breeding cage unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ventilation system in a ventilation breeding cage unit which has stable ventilation pressure and air flow suitable for breeding and care of experimental animals by evenly distributing air flow sent from a blower. <P>SOLUTION: The ventilation system in the breeding ventilation cage unit has a constitution that in an air blasting system for sending air from a blower to the cage unit in the individual cage units for breeding experimental animals, the blower is installed on the ground, an air sending route from the blower is sent to air supply tubes arranged at both sides of the cage unit, a breeding cage chamber for holding a cage is arranged in the cage unit and the breeding cage chamber is in a stage-like state, in the breeding cage chamber of each stage, air blasting holes are arranged at the air supply tubes, an exhaust port is installed at the bottom of each breeding cage chamber and exhaust ventilation is successively carried out. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a ventilation system for a ventilated cage unit used for breeding laboratory animals provided with means for sterilizing supply air.

  Conventionally, in the isolation of infection, various sterilizers and methods for laboratory animal ventilation rearing units have been proposed to prevent infection. For example, even if a person enters a room in which an animal is housed, it is partitioned by an air curtain to prevent infection from human to animal or from animal to human. In this case, the air blown into the animal area is separated from the human being, sterilized, and circulates in the breeding area, so that the entry and exit of the bacteria can be prevented. In this case, it is necessary to provide an air curtain device in the entire breeding room. And it is necessary for breeding management to ventilate each breeding unit, and a ventilation device for the ventilation is provided.

Also, as the structure inside the sterilization box,
(1) Some sterilization boxes are provided with an activated carbon layer, a photocatalyst layer, and air sterilization / deodorization means such as ultraviolet rays (see, for example, JP-A-63-315138).

(2) Some sterilization boxes are provided with an electrostatic precipitator, an ozone generator, and an ozone decomposition catalyst (for example, see JP-A-2-48050).

(3) Some air purifiers are provided with an ozone generator and an anion generator and provided with a sterilizing / deodorizing means (see, for example, JP-A-4-260732).

(4) Some sterilization boxes have an ultraviolet lamp and are sterilized and deodorized (for example, see JP-A-7-239140).

(5) Some sterilization boxes include a sheet filter containing an antibacterial agent such as silver zeolite in addition to an ozone generator and an ozone decomposition catalyst (see, for example, JP-A-6-323571).
(6) There is one in which a sheet filter containing an antibacterial agent such as silver zeolite is applied or a coating film is formed on the inside or inner wall of a sterilization box, a fan, a filter, or the like (see, for example, JP-A-5-55176) .

  A fan unit is used in such an individual ventilation breeding cage unit for breeding laboratory animals, and a centrifugal blower is used as a blower for its boosting capability. Then, the air volume is controlled. For this purpose, a short-diameter duct or a hopper duct on the discharge side is provided, and then a throttle mechanism composed of a damper such as a counter blade type, a slant blade type, or a swing type is provided and installed. The air volume was adjusted to the required air volume.

These fan units (1) are installed at the top of the cage unit, as shown in FIG. 7, from which they are fed through supply ducts on both sides of the unit. The fan unit is immediately connected to the supply duct at the outlet. On both sides, there is a delivery duct connected to the supply duct. The delivery duct has a hole for supplying air into the room of the breeding cage, from which air for ventilation is sent.
However, since the fan unit (1) is usually installed at the upper part of the cage unit, it is difficult to supply air to both sides evenly through the upper supply duct.
FIG. 3 is a detailed view of a cage unit in which the cage shown in (2) of FIG. 1 is housed.
FIG. 3 shows a cage for laboratory animals to be reared.

Japanese Patent Application No. 5-42883 JP-A-6-62696 JP-A-9-252676 Japanese Patent Laid-Open No. 2005-6618 JP-A-8-319995 JP-A-9-158898 JP 2004-68644 A

The fan unit used for the cage unit for ventilation for breeding the laboratory animals described above has been desired to have a system that effectively ventilates a single breeding cage unit or a plurality of breeding cage units. .
However, until now, it has not been easy to send the air sent by the duct from the blower evenly to the supply cylinders on both sides. Moreover, since it was mounted on the upper side of the cage unit, vibrations were transmitted, which had an undesirable effect on the domestic animals.

  However, each breeding cage unit is required to maintain uniform ventilation for breeding animals.

  In order to solve the above-mentioned problems, the present invention distributes the air volume sent from a conventional blower evenly, thereby ventilating in a ventilated rearing cage unit having a stable ventilation pressure and air volume suitable for breeding and rearing laboratory animals. The purpose is to obtain a system.

  In order to solve the above-mentioned problems, the present invention provides a ventilation system from a blower that blows air to a cage unit in an individually installed cage unit for breeding to a laboratory animal. The air supply path is sent to the supply cylinders provided on both sides of the cage unit, and the cage unit is a breeding cage room in which the cage is housed, and the breeding cage room is stepped, The breeding cage room on each floor is provided with a ventilation hole in the supply cylinder to supply air, and an exhaust hole is provided at the bottom of each breeding cage room. Provide a ventilation system in the cage unit.

  The air supply path for supplying air to the supply cylinders provided on both sides of the cage unit provides a ventilation system in the ventilation breeding cage unit provided on the upper side of the supply cylinder.

The pipe for supplying air to the supply cylinder consists of each supply and discharge, and the supply cylinder is connected to the supply and discharge pipe, and each supply cylinder is also divided for each supply and discharge • Provide a ventilation system in the unit.

    Provided is a ventilation system in a ventilation breeding cage unit in which a duct that feeds air from a supply cylinder is provided above the breeding cage room, and a hole that feeds air downward is provided from the duct.

  An exhaust vent at the bottom of the rearing cage room provides a ventilation system in a ventilated rearing cage unit that is open to the open air on the final floor.

  The exhaust hole at the bottom of the rearing cage room is provided with a return path to return to the suction side of the air blower on the final floor, so that the air of infected laboratory animals does not leak bacteria to the outside without leaking to the outside. It can be.

  The effect of the present invention is that the cage unit can be evenly and stably ventilated, the laboratory animals can be easily managed, and the growth can be ensured. Further, since the air volume and the air pressure can be made uniform, the control becomes simple, and the overall management can be easily integrated and the temperature control is easy for the domestic animals of the cage unit.

Embodiments of the present invention will be described with reference to the drawings based on examples.
FIG. 2 shows the whole of each ventilation breeding cage unit (6) which is one embodiment of the present invention. As shown in FIG. 2, the ventilation breeding cage unit (6) includes a plurality of breeding cages (7).

  The ventilation breeding cage unit (6) includes a plurality of breeding cages (7) and is suspended and arranged in several steps. As shown in FIG. 3, each breeding cage (7) contains guinea pigs, mice, rats, rodents and the like as experimental animals.

As shown in FIG. 2, the ventilated cage unit (6) has a fan unit device (1) including a blower for ventilation in each room, on the lower side of the ventilated cage unit (6). It is equipped with a part and sends pre-sterilized air.
The inside of the cage unit (6) can constitute a housing, for example, with a casing made of an antibacterial steel plate obtained by baking and painting an inorganic antibacterial agent or a photocatalyst on the inner and outer surfaces. In addition, an antibacterial agent can be contained in and retained on the inner surface. In this case, an antibacterial agent is contained in the paint and applied by baking, roller coating or spraying.

As the antibacterial agent, inorganic materials such as silver, zinc oxide, copper, or organic materials are used alone or in combination. Due to the action of antibacterial agents, bacteria on or near the surface of coatings,
Growth of microorganisms such as mold is suppressed, and can be reduced and sterilized.

As shown in FIG. 2, the air passage extends from the fan unit device (1) to each breeding cage (7), and passes through the duct (600) from the fan unit (1). Connected to ventilated cage unit (1). As shown in (2) of FIG. 2, a supply main line (601) is arranged on each individual ventilation breeding cage unit (6) from the fan unit device (1), and the supply main line ( From 601), the air is supplied to the air supply branch ducts (610) and (610) provided on both sides of each individual ventilation cage unit (1).

The branch ducts (610) (610) are preferably provided on both sides of each individually ventilated cage unit (1) and extend long along the side wall of the unit (1). The supply main pipeline (601) may be a duct.
In addition, the supply return pipe (602) returns from the branch ducts (610) (610) to the fan unit device (1) of the blower section (2).
In this case, since the fan unit device (1) is hermetically sealed, there is no possibility that unsterilized air from the outside enters. Moreover, when replenishing air from the outside, a sterilizer is provided in the upstream direction of the suction inlet 20 (not shown).

Each individual ventilation cage unit (1) is sent from the branch duct (610) to the vice duct (621) that further suspends the cage (10). The branch duct (610) is divided into two parts, one being a bypass duct (621) for supplying air and the other being a bypass duct (622) for scavenging. In FIG. 2, the left and right sides are divided when viewed in a plane.
In this example, the air supply is a positive pressure, but conversely, it can be sucked as a negative pressure. In this case, it is connected to the suction side of the blower and the other is connected to the discharge side. However, in the case of a negative pressure, leakage from the cage (10) does not leak to the outside.

The vice duct (621) is formed by dividing the cage chamber (701) of the cage (10) into upper and lower parts and suspending the cage (10) to bypass the pipes (701) and (702) into the cage (10). The air is sent and exhausted by connecting the air supply and exhaust holes provided on the floors of the ducts (621) and (622).
In particular, when not required, it is possible to connect the duct (10) to the cage (10) without using a duct. Also, as shown in FIG. 2 (2), the blower section (2) is directly sent to the branch duct by the air supply pipe (630) to the branch duct (610), and the wall of the branch duct (610) is sent to the branch duct (610). Perforations (not shown) can also be fed into the cage chamber (701).
The return pipe (631) returns to the blower part (2).
Further, as shown in (2) of FIG. 2, it is also possible to feed directly from the air blowing hole (700). In the same figure, there is also a way to connect the dotted line portions.
Of course, as shown in FIG. 2 (3), it is also possible to provide a duct (720) as shown in FIG.

Further, the inside of the branch duct (610) can be circulated separately for sending and discharging, and returned to the blower section (2) by the return pipe (631). In this case, it can be seen that half of the cage chamber (701) is air supply and exhaust, and half is the exhaust region as seen in (1) of FIG. In other words, a return conduit is added.
In order to suspend, as shown in (2) of Drawing 3, it can also serve as a pipe (701) (702). In that case, it is possible to omit special and construction hanging tools.

As shown in FIG. 2, the air supply state is such that the cylindrical air supply ducts (610) on both sides from the discharge port of the fan unit (2) of the fan unit device (1) through the supply main line (601) ( 610) through each breeding cage room (701).
In the case shown in (2) of FIG. 2, when passing through the bypass duct (621), the lower cage chamber (701) is directly transferred to the lower cage chamber (701). ) As shown by the arrow. The inflowing gas forms a flow returning to the return pipe (631) after supplying fresh air to the cage (7). Of course, the upper cage chamber (701) can be the same as the bypass duct (621) in the same manner as the lower cage chamber (701).
The duct or the like may be a pipe line. In short, any air supply path that can send air may be used.

  The air supply from the blower unit (2) is preferably connected to the upper side of the air supply ducts (610) and (610) on both sides of the supply main line (601). This is preferable in view of the pressure loss sequentially supplied to the cage chamber (701), and the air supply ducts on both sides communicate with each cage chamber (701). It is also for replenishing pressure loss due to qi.

FIG. 4 shows another embodiment.
In this case, air is directly supplied from the fan unit device (1) to the cylindrical air supply ducts (610) and (610) on both sides, unlike the above embodiment, through the pipe line (5). This is an example without a return line.

  That is, the air sent from the pipe line (5) to the air supply ducts (610) (610) is sent to the cage chambers (701). The pressurized air that has entered each chamber (701) is supplied to the cage (7) and then sent to the next cage chamber (701) through the exhaust hole (710) provided in the floor.

Specifically, the air supply ducts (610) and (610) on both sides of the cage chamber (701) that accommodates a plurality of cages (7), which are formed in a stepwise upper and lower rooms, are arranged on both sides. Air is blown into the gauge chambers (701) through the air holes (700) provided in the walls of the air supply ducts (610) and (610).
That is, the air blowing hole (700) supplies air into each gauge chamber (701). The air in the upper gauge chamber (701) is exhausted to the lower gauge chamber (701). The pressure loss in the next cage chamber (701) is replenished by the air supply duct.

An exhaust hole (710) is provided at the bottom of the floor of the cage chamber (701), and is sequentially discharged to the lower floor, but is exhausted to the outside on the final floor.
Of course, as a countermeasure against infection, if it is a problem to exhaust to the outside air on the final floor, the bottom is sealed as shown in (1) of FIG. 3 to form a space (8), and the fan unit device ( It is also possible to install a pipe line (80) returning to the suction side of the blower part (2) of 1).

  In this embodiment, the fan unit device (1) is placed on the left side of the ventilated cage unit (6) as shown in FIG. 2, but before or after the ventilated cage unit (6). This is most preferred because it is understood that when placed in the middle, as shown in FIG. 4 (1), the duct lengths are more equal and an even wind pressure is obtained.

Next, as shown in FIG. 4, an example in which the ventilation breeding cage unit (6) becomes a plurality as shown by the dotted line on the right side will be described.
This example is similar to that shown in FIG.
By connecting the ventilated breeding cage units (6) sequentially with ducts, a plurality of air can be blown. Also in this case, as described above, the fan unit device (1) is preferably installed in the middle of the plurality of ventilated cage units (6) as shown in (1) of FIG.

With respect to this arrangement, as shown in FIG. 6 (2), when the fan unit device (1) is arranged in the middle with the ventilation cage unit (6) in between, the ducts (5) and (5) are connected to each other. It will be appreciated that the distance of the ducts to the ventilated cage unit (6) is symmetrical, each equal, and therefore the wind pressure is equal.
It is also possible to adjust the air volume by providing adjusting valves (9) and (9) in the divided ducts (501) and (501) branched from the ducts (5) and (5).

Further, consider the case where the ventilation cage unit (6) is 2 or more.
As shown in FIG. 5 (1), the ventilation cage unit (6) is sequentially connected by a duct (5). The final ventilated cage unit (6) is connected and completed.
In each ventilation breeding cage unit (6), a split duct (501) (501) branched from the duct (5) is connected to the air supply duct, and only the end is shown in (1) of FIG. Thus, a right end part is connected directly and branches on the air blower side.
Also in this case, as described above, as shown in (4) of FIG. 6, the wind pressure can be made more uniform by disposing the fan unit device (1) in the middle of the ventilation breeding cage unit (6). . In this case, the connection on the end side is the same and is directly connected.

  What is shown in (3) of FIG. 6 is what arrange | positions fan unit apparatus (1) on the both sides with respect to what was arrange | positioned in parallel with respect to several ventilation breeding cage units (6). In this case, it is possible to supply a more uniform wind pressure and air volume.

Also, as shown in FIG. 5 (2), the fan unit device (1) has a configuration inside the duct (5) (5) immediately from the discharge port (201) of the blower unit (2). If the pressure equalizing space (101) is provided from the discharge port (201) instead of sending, the pressure is equalized and supplied when air is supplied from the ducts (5) and (5).

In addition, although demonstrated as a duct, a pipe and a pipe line may be sufficient as needed.
In the case of a duct, however, there is an advantage that it can be closely attached to the side wall of the breeding cage unit (6), and it is easy to attach and see.

  Such a fan system must always be clean and provide good ventilation for domestic animals, but stable and non-pulsating stable ventilation is desirable for domestic animals. This is because many domestic animals are sensitive to changes in the environment, and a stable air volume is most preferable.

In this embodiment, a centrifugal blower is used as the blower, but another centrifugal type, for example, a multi-blade centrifugal blower (sirocco type) may be used. In particular, in a centrifugal blower, it becomes a preferable aspect from the situation of the flow of the discharge port (5).
In other words, the centrifugal blower uses a centrifugal force to throw out the fluid from the center to the outside, so that it flows along the casing and is pushed outward at the discharge port. Therefore, it is difficult to gather inward, and eddy currents are easily generated. Therefore, in the centrifugal type, as described above, it is desirable that the closing portion (4) is provided in the casing inner side (5).

In addition, as another blower, a cross-flow fan (also referred to as a cross-flow fan) may be used. In this case, since the flow is two-dimensional, the installation method has an advantage that it can be arranged in a line as used in an air curtain. Of course, an axial fan can also be used. In particular, if a cross-flow fan is used, it can be effectively matched with a horizontally long air supply port and exhaust port.

  Although the embodiments have been described above, the present invention is not limited to these embodiments, and various modifications can be made by those skilled in the art within the scope of the technical idea of the present invention.

The examples so far include the entire ventilated cage unit. 1 illustrates one embodiment of a ventilation system in a ventilated cage unit of the present invention. The example of the cage | basket of the laboratory animal reared in the ventilation breeding cage unit of this invention is shown. 1 shows one or more embodiments of a ventilation system in a ventilated cage unit of the present invention. 2 shows several embodiments of a ventilation system in a ventilated cage unit of the present invention. Figure 2 shows each embodiment of one or more arrangements of ventilation systems in a ventilated cage unit of the present invention.

DESCRIPTION OF SYMBOLS 1 Fan unit apparatus 2 Blower part 6 Ventilation breeding cage unit 610 Air supply duct 7 Breeding cage 701 Cage room

Claims (6)

  In a ventilation system from a blower that blows air to the cage unit in a cage unit that is individually installed for laboratory animals, the blower is installed on the ground, and the air supply path from the blower is on both sides of the cage unit. The cage unit is a breeding cage room in which the cage is accommodated, and the breeding cage room is stepped, and the breeding cage room on each floor includes a feeding cylinder. Ventilation system in a ventilation cage unit characterized in that a ventilation hole is provided and air is delivered and an exhaust hole is provided at the bottom of each cage cage room, and exhausted sequentially to the breeding cage room below.   2. A ventilation system in a ventilated breeding cage unit according to claim 1, wherein an air supply path for supplying air to the supply cylinders provided on both sides of the cage unit is provided on an upper side of the supply cylinder. The pipeline for supplying air to the supply cylinder is composed of each supply and discharge, and the supply cylinder is connected to the supply and discharge pipeline, and each supply cylinder is also divided for each supply and discharge. The ventilation system in the ventilation breeding cage unit according to claim 1 or 2     4. A duct for supplying air from a supply cylinder is provided above the breeding cage room, and a hole for supplying air downward is provided from the duct. Ventilation system in a ventilated rearing cage unit   5. A ventilation system in a ventilated cage unit according to claim 1, wherein an exhaust hole is opened to the outside on the last floor of the cage cage room.   4. A ventilation system for a ventilation breeding cage unit according to claim 1, wherein an exhaust hole is provided at the bottom of the breeding cage room so as to return to the suction side of the blower on the final floor.