阅读说明：本技术 安全柜 (Safety cabinet ) 是由 金子健 佐藤博利 高泽优志 于 2019-02-04 设计创作，主要内容包括：本发明提供一种能够在使用期间管理清洁度的安全柜。为了实现上述目的,本发明的安全柜包括：具有工作台的作业空间；形成在作业空间的前表面的前面板；设置在该前面板的下部的作业开口；在工作台的前方侧且在作业开口的附近设置的通向下方的吸气口；和使从该吸气口吸入的空气通过作业空间的下部、背面和上部的空气循环通路,该安全柜还包括：颗粒计数器；在作业空间中将空气吸入颗粒计数器的作业空间取气口；和将空气从作业空间取气口导入颗粒计数器的导入配管。(The present invention provides a safety cabinet capable of managing cleanliness during use. In order to achieve the above object, the safety cabinet of the present invention comprises: a working space having a table; a front panel formed on a front surface of the working space; a working opening arranged at the lower part of the front panel; an air suction port which is arranged at the front side of the workbench and is communicated with the lower part near the operation opening; and an air circulation path for allowing air sucked from the suction port to pass through a lower portion, a rear surface and an upper portion of the working space, the safety cabinet further comprising: a particle counter; an operation space air intake for drawing air into the operation space through the particle counter; and an introduction pipe for introducing air from the working space air intake port into the particle counter.)

1. A safety cabinet, comprising:

a working space having a table; a front panel formed on a front surface of the working space; a working opening arranged at the lower part of the front panel; an air suction port which is arranged at the front side of the workbench and is communicated downwards and is arranged near the operation opening; and an air circulation passage for allowing air sucked from the air suction port to pass through the lower part, the back surface and the upper part of the working space,

this safety cabinet still includes:

a particle counter;

a working space air intake in the working space for drawing air into the particle counter; and

and an introduction pipe for introducing air from the working space air intake port into the particle counter.

2. A safety cabinet according to claim 1, wherein:

the particle counter includes a plurality of introduction pipes and a particle counter, each of which corresponds to each of the plurality of working space air intake ports.

3. A safety cabinet according to claim 1, wherein:

a plurality of the working space air intake ports are arranged,

a plurality of introduction pipes corresponding to the plurality of working space air intake ports,

and a branch switching means for switching a branch passage of air from the plurality of introduction pipes and connecting the branch passage to the particle counter.

4. A safety cabinet according to claim 1, wherein:

the device is provided with a control device which is provided with a control device,

the control means compares the number of fine particles counted by the particle counter with a set threshold value, and issues an alarm when the number of fine particles exceeds the set threshold value.

5. A safety cabinet according to claim 1, wherein:

is provided with a control device and a display,

the control means compares the number of fine particles counted by the particle counter with a set threshold value, and displays a countermeasure on a display when the number of fine particles exceeds the set threshold value.

6. A safety cabinet according to claim 1, wherein:

an air intake port for drawing air into the particle counter is provided near the air intake port,

the particle counter has an introduction pipe for introducing air from the air intake port into the particle counter.

7. A safety cabinet according to claim 6, wherein:

a second particle counter is provided for drawing air from the intake at the intake.

8. A safety cabinet according to claim 6, wherein:

the particle counter includes a branch switching unit that switches a branch passage of air from the work space air intake and air from the air intake at the air intake to suck air into the particle counter.

9. A safety cabinet according to claim 6, wherein:

comprising: a blowing-out side FFU located above the working space and blowing out the air in the air circulation passage into the working space; a discharge side FFU for discharging the air in the air circulation passage to the outside; and a control device for controlling the operation of the motor,

the control device compares a first number of particles of the air from the working space intake port measured by the particle counter with a first set threshold value, compares a second number of particles of the air from the intake port measured by the particle counter with a second set threshold value, and enhances the operation of the discharge-side FFU when the first number of particles is equal to or less than the first set threshold value and the second number of particles is equal to or more than the second set threshold value.

Technical Field

The present invention relates to a safety cabinet for excluding the risk of contamination from the outside using an air barrier.

Background

Disclosure of Invention

Technical problem to be solved by the invention

In the safety cabinets for maintaining the internal cleanliness for safely performing work as shown in patent documents 1 and 2, the cleanliness is managed only by the operation parameters such as the intensity of the initial air blow, and the management of the actual cleanliness during use is not considered.

In view of the above, it is an object of the present invention to provide a safety cabinet which is capable of managing the cleanliness during use.

Means for solving the problems

In view of the foregoing background and problems, one example of the present invention provides a safety cabinet, comprising: a working space having a table; a front panel formed on a front surface of the working space; a working opening arranged at the lower part of the front panel; an air suction port which is arranged at the front side of the workbench and is communicated with the lower part near the operation opening; and an air circulation path for passing the air sucked from the suction port through the lower, rear and upper portions of the working space, the safety cabinet further comprising: a particle counter; an operation space air intake for drawing air into the operation space through the particle counter; and an introduction pipe for introducing air from the working space air intake port into the particle counter.

Effects of the invention

According to the present invention, it is possible to provide a safety cabinet capable of managing cleanliness during use.

Drawings

Fig. 1 is a schematic front view of a prior art safety cabinet.

Fig. 2 is a schematic side sectional view of the safety cabinet of section a-a' of fig. 1, viewed from the right side.

Fig. 3 is a view illustrating air flow when the safety cabinet of fig. 2 is operated.

Fig. 4 is a schematic front view of the safety cabinet in embodiment 1.

Fig. 5 is a schematic side sectional view of the safety cabinet in embodiment 1.

Fig. 6 is a schematic front view of the safety cabinet in embodiment 2.

Fig. 7 is a schematic front view of the safety cabinet in embodiment 3.

Fig. 8 is a schematic side sectional view of the safety cabinet in embodiment 4.

Fig. 9 is a diagram showing the air flow in the cleanliness improving operation mode of the safety cabinet according to embodiment 4.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings.