JPH0657149U - Laboratory animal breeding room - Google Patents

Abstract

(57) [Summary] [Purpose] Equally distributed to each of the several animal cages that contain the experimental animals intended for the study, mainly for the safety and efficacy evaluation of chemical substances. The present invention relates to a laboratory animal room in which laminar flow ventilation is possible. [Structure] A central work area where workers work in the room,
A plurality of cages on both sides of the cage are vertically divided into cage arrangement areas arranged with a required space between the steps, and a perforated plate is stretched over the entire ceiling of the central working area, and the cage is attached to the ceiling of each cage. An exhaust duct is provided to supply laminar flow air vertically downward from the perforated plate, and the outer layer of the laminar flow air flows into the upper cage and the inner layer into the lower cage at equal pressures. The human working space and the animal housing space are integrally sealed so that air is exhausted from the exhaust duct of each cage, and the air supply and exhaust are completely laminarized.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention provides uniform laminar flow ventilation in each of several animal-rearing cages containing experimental animals for the purpose of test research centering on safety and efficacy evaluation tests of chemical substances etc. The present invention relates to an experimental animal breeding room that is made possible.

[0002]

[Prior art]

 Conventionally, this type of ventilation mechanism in an animal laboratory is a means for discharging outside air from an air supply port provided in the room to the entire room and exhausting it to the outside from an exhaust port provided at another position in the room. However, the strength of the circulating airflow layer that recirculates indoors is not uniform, and a layer with a weak circulating airflow or a stagnant layer is inevitably generated. Ventilation in the operating cage is naturally poor, so if the overall ventilation effect is low, and if the amount of air supply / exhaust is increased in order to reduce any layers with weak circulation and stagnant layers. There were problems such as an increase in ventilation load, an increase in the size of ventilation equipment, and a rise in operating and maintenance costs.

[0003]

[Problems to be solved by the device]

 The present invention aims to equalize the ventilation of each cage and improve the ventilation efficiency in a room equipped with several cages for housing animals, thereby reducing the labor load associated with reducing the ventilation load of the entire room. The aim is to obtain a laboratory animal breeding room that can contribute to improving the quality of the living environment by reducing the cost of operation and maintenance, and flattening the temperature and humidity distribution.

[0004]

[Means for Solving the Problems]

 The present invention has been made in view of the above-mentioned viewpoints, in which a room is provided with a central work area where workers work, and a plurality of cages on both sides of the work area are provided with a required space between the cages. It is divided vertically into the cage arrangement area, and a perforated plate is installed on the ceiling of the whole central working area, and an exhaust duct is provided on the ceiling of each cage, and the laminar air is supplied vertically downward from the perforated plate. The outer layer of the laminar air flows into the upper cage and the inner layer into the lower cage at equal pressure, and is exhausted to the outside from the exhaust duct of each cage. The aim is to provide an experimental animal breeding room in which the animal housing space is integrally sealed and the air supply and exhaust are completely laminar.

[0005]

[Action]

 Next, the operation of the present invention will be described. Laminar air supplied from a perforated plate stretched over the ceiling of the central working area in the room flows out vertically downward, and the air flow reaches the working floor surface of the central working area in a short time. There, the laminar air impinges on the floor surface and is received, and the air flow laminarly opens to the cage placement areas on both sides thereof, as shown in FIG. At that time, the air in the outer layer of the laminar flow air flows into the cage located in the upper part, and the air in the inner layer flows into the cage located in the lower part in a layered manner at a uniform pressure, and is exhausted to the outside from the exhaust duct of each cage.

That is, the laminar air supplied from the perforated plate on the ceiling of the entire central work area sequentially flows from the uppermost cage to the lowermost cage in a layered manner at an equal pressure from the outermost layer to the innermost layer. Then discharged to the outside.

[0007]

【Example】

An embodiment of the present invention will be described below with reference to the drawings along with its operation. The room 1 is vertically divided into three sections. The center of the section is a work area 2 where workers work, and the cage placement areas 3 and 3 are on both sides of the work area.

A perforated plate 5 is stretched over the entire ceiling 4 of the central work area 2. Air is layered vertically from a large number of holes 6 of the perforated plate 5 toward the work floor surface 7.

In the cage placement areas 3 and 3 on both sides of the central work area 2, for example, a plurality of cages 8 such as two stages for dogs and monkeys and three stages for rabbits are provided between the stages. It is located at the required space. An exhaust duct 10 is provided on the ceiling 9 of each cage 8.

A wash water pipe 12 for washing the floor of each cage 8 is arranged on the floor 11. 13 is an experimental animal (dog).

With the above configuration, the laminar flow air supplied toward the floor surface 7 from the multiple holes 6 of the perforated plate 5 stretched over the entire ceiling 4 of the central work area 2 in the chamber 1 is indicated by an arrow. Run out vertically downward as indicated by. The air flow reaches the work floor surface 7 of the central work area 2 in a short time of, for example, about 10 seconds. Then, the laminar flow air hits the floor surface 7 and is pressure-received. There, the laminar flow air opens like a skirt to the cage arrangement areas 3 and 3 on both sides thereof and flows in a laminar manner.

In this case, the air in the outer layer of the laminar flow air is applied to the cage in the upper part, the air in the middle layer to the cage in the middle part, and the air in the inner layer to the cage in the lower part at equal pressures. It flows in layers and is exhausted to the outside from the exhaust duct 10 of each cage.

[0013]

[Effect of device]

 As is apparent from the above description, according to the present invention, a room is provided with a central work area where workers work, and a plurality of cages on both sides of the work area are arranged with a required space between the cages. It is divided vertically into a cage arrangement area, a perforated plate is installed on the ceiling of the entire central working area, an exhaust duct is provided on the ceiling of each cage, and laminar air is supplied vertically downward from the perforated plate. The outer layer of the laminar flow air flows into the cage in the upper part and the inner layer into the cage in the lower part at equal pressure, and is exhausted to the outside from the exhaust duct of each cage. Since the storage space is integrally sealed and the air supply and exhaust are completely laminar, the air supply and exhaust are all treated as a uniform laminar flow. There is no change or unevenness in laminar flow depending on the position of That. Therefore, ventilation in the cage is thorough and efficient, and since the ventilation is uniform, the work environment can be improved in quality by flattening the temperature and humidity distribution.

Further, since the air flow from the perforated plate holes in the ceiling of the entire central work area to the exhaust duct of each cage always has one direction, the air crossing between the indoor worker and the breeding animal is always one direction. In addition, no air contaminated by domestic animals will flow out into the central work area of the room and indoor workers will normally avoid breathing air contaminated by domestic animals.

Further, not only can the supply and exhaust of air be laminar, but the sewage does not contaminate the outside of the cage even during indoor disinfection and cleaning, so the inside of the cage and the floor of the work space are not covered. It is enough to wash.

Furthermore, in the case where the breeding animal is a dog, when 37 m ³ / head / hour of fresh adjusted air (the number of bacteria is 0) is supplied, in the conventional breeding room, the number of fallen bacteria is about 500 in 30 minutes, The maximum concentration of ammonia was 20 ppm, the same was 200, and the concentration was 7 to 8 ppm, an outstanding improvement was confirmed, and the required floor area was halved or less.

In this way, the required air conditioning volume of the entire facility is greatly reduced, which contributes to labor saving of ventilation, reduction of operation and maintenance costs, and reduction of the building area, as well as long-term breeding tests and child-rearing. It is possible to stably carry out subtle and difficult tests such as young animal tests and immunosuppression tests.

[Brief description of drawings]

FIG. 1 is an elevational view showing an embodiment of the present invention.

[Explanation of symbols]

 1 Room 2 Central Working Area 3 Cage Placement Area 4 Ceiling 5 Perforated Plate 6 Holes 7 Working Floor Surface 8 Cage 9 Ceiling 10 Exhaust Duct 11 Floor 12 Wash Water Pipe 13 Experimental Animal (Dog)

Claims (1)

[Scope of utility model registration request] 1. A room is vertically divided into a central work area where a worker works and a cage arrangement area in which a plurality of cages are arranged on both sides of the cage with a required space between the cages. A perforated plate is stretched over the ceiling of the entire work area, an exhaust duct is provided on the ceiling of each cage, and laminar air is supplied in the downward vertical direction from the perforated plate, and the outer layer of the laminar air is the upper step portion. In the cage, the inner layer flows into the cage in the lower part at equal pressure and is exhausted from the exhaust duct of each cage to the outside to integrally seal the human working space and the animal accommodation space, and to supply and exhaust air. A laboratory animal breeding room characterized by completely laminar flow.