Today BOKA wants to update with you the design of the hospital laboratory design. The hospital laboratory should have been seen by many people. I have never seen it before, so do you know the specific hospital laboratory construction plan? And listen to Xiaobian to tell you slowly.
Set up a regular bed:
Article 1.0.4 The determination of the size and standard of the hospital, the setting of the medical technology department and the specialist ward shall be carried out in accordance with the approved design task book.
Article 1.0.5 and the design of general hospitals for the disabled shall comply with the relevant professional norms.
Article 1.0.6 In addition to the implementation of this code, the architectural design of a general hospital shall comply with (General Rules for the Design of Civil Buildings) and relevant design standards, norms and regulations promulgated by the State and professional departments.
The temperature and humidity of the laboratory construction space are mainly determined according to the process requirements, but the human comfort should be considered under the conditions that meet the process requirements. With the improvement of air cleanliness requirements, there is a trend that the process has stricter requirements on temperature and humidity. The temperature requirements of the specific process will be enumerated later, but as a general principle, as the machining accuracy becomes more and more fine, the requirements for the temperature fluctuation range are getting smaller and smaller. For example, in a lithographic exposure process for large scale integrated circuit production, the difference in thermal expansion coefficient between glass and silicon wafer as a mask material is required to be smaller and smaller. A silicon wafer with a diameter of 100 um, with a temperature rise of 1 degree, causes a linear expansion of 0.24 um, so a constant temperature of ±0.1 degrees must be required, and a humidity value of one is required.
For most clean spaces, in order to prevent intrusion of external pollution, it is necessary to maintain the internal pressure (static pressure) higher than the external pressure (static pressure). The maintenance of pressure difference should generally meet the following principles.
1. The pressure in clean spaces is higher than the pressure in non-clean spaces.
2. The pressure in a space with a high level of cleanliness is higher than the pressure in a space with a low level of cleanliness.
The maintenance of the pressure difference depends on the amount of fresh air. This new air volume must compensate for the amount of air leaking from the gap under this pressure difference. Therefore, the physical meaning of the pressure difference is the resistance when the air volume leaks (or penetrates) through various gaps in the clean room.
Airflow speed regulations in cleanrooms:
The airflow velocity to be discussed here refers to the airflow velocity in the clean room, and the airflow velocity in other clean spaces is explained when discussing specific equipment.
For the turbulent clean room, the main reason is to reduce the degree of indoor pollution by the dilution effect of the air. Therefore, the concept of the number of air changes is mainly used instead of the concept of speed, but the indoor air flow speed also has the following requirements;
(1) The airflow velocity at the outlet of the air supply port should not be too large. Compared with the air-conditioned room, the speed attenuation is faster and the diffusion angle is larger.
(2) The airflow speed blown through the horizontal plane (for example, the recirculation speed when the side is sent) should not be too large, so as to prevent the surface particles from returning to the airflow and causing re-contamination. This speed is generally not suitable for drying at 0.2 m/s.
For the parallel flow clean room "has used to be called laminar flow clean room", the speed on the cross section is a very important indicator because the piston is squeezed by the air flow, so the speed on the cross section is a very important indicator. In the past, it was referred to the US 20gB standard, using 0.45. m/s. But people also understand that the amount of ventilation required for such a large speed is extremely large, and in order to save energy, it is also exploring the feasibility of reducing the wind speed.
In China, the "Air Clean Technology Measures" and (Clean Plant Design Specifications) are all stipulated in this way.
Vertical parallel flow (laminar flow) clean room ≥ 0.25m / s
Horizontal parallel flow (laminar flow) clean room ≥0.35 m/s
The noise standards for clean laboratory construction are generally stricter than the standards for health protection. The purpose is to ensure normal operation, meet the necessary conversations and a safe and comfortable working environment. Therefore, the main indicators for measuring the noise of clean rooms are:
1. Annoying effect
Because of the noise, people feel uncomfortable and have troubles. They are generally classified into extremely quiet, quiet, quiet, slightly noisy, relatively noisy and extremely noisy. Where the level of response is very noisy and extremely noisy, it is a high annoyance, and the percentage of the total number of people with high troubles is the high annoyance rate.
2. Impact on work efficiency
This mainly depends on the level of response in three aspects. These three aspects are: concentration, accuracy of action, and speed of work;
3. Interference with integrated communications
This is mainly divided into: clear or satisfied, slightly difficult, difficult, impossible
The above three indicators are evaluated by A sound level. In the 1950s, it was proposed to use a spectrum curve as the evaluation criterion, that is, the sound pressure level of the center frequency of each frequency band should not exceed the curve. Later, I learned that the A-level of the brush to measure the noise and noise of the noise and noise is more suitable, and can replace the octave band sound pressure level as an indicator of the evaluation standard.