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在密闭的库房内,空气温差1℃,将对壁面产生40毫米水柱/米~2的压力。这是根据理想气体状态参数方程式进行计算而得的(注1)。压力平衡阀是为了使冷藏间内外沟通,以控制冷藏间内因温度变化引起的减压或升压。平衡阀可调节空气的进出量,图1说明理想平衡阀的性能。当压差△P在+P和-P值之间。平衡阀不起作用,这种压差对于冷藏间围护结构来说是可以承受的。当压差超过了+P或-P时,平衡阀就马上打开,并让较大的空气量通过,以平衡冷藏间内部压力的过大变化。
In a closed warehouse, the air temperature difference of 1 ℃, the wall will produce 40 mm water column / m ~ 2 pressure. This is calculated based on the ideal gas state parameter equation (Note 1). Pressure balance valve is to communicate inside and outside the refrigeration room to control the refrigeration room due to temperature changes caused by the decompression or boost. Counterbalance valve can adjust the amount of air in and out, Figure 1 shows the ideal balance valve performance. When pressure difference ΔP is between + P and -P value. Counterbalance valve does not work, this pressure differential for the chiller enclosure is sustainable. When the pressure difference exceeds + P or -P, the balance valve opens immediately and allows a larger amount of air to pass to balance the excessive pressure changes within the cold room.