JP2017187419A - Pressure controller of atmospheric pressure adjustment test room - Google Patents

Pressure controller of atmospheric pressure adjustment test room Download PDF

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JP2017187419A
JP2017187419A JP2016077274A JP2016077274A JP2017187419A JP 2017187419 A JP2017187419 A JP 2017187419A JP 2016077274 A JP2016077274 A JP 2016077274A JP 2016077274 A JP2016077274 A JP 2016077274A JP 2017187419 A JP2017187419 A JP 2017187419A
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control valve
pressure
exhaust
test chamber
air supply
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JP6218875B2 (en
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哲明 坪野
Tetsuaki Tsubono
哲明 坪野
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Daikin Industries Ltd
Daikin Applied Systems Co Ltd
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Daikin Applied Systems Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To improve accuracy of control while securing a wide pressure adjustment range regarding a pressure controller of an atmospheric pressure adjustment test room.SOLUTION: A pressure controller of an atmospheric pressure adjustment test room includes: an air supply passage (21); an exhaust passage (31); an air supply control valve (23):and an exhaust control valve (33) to control pressure P in a test room (1) to be a target pressure by adjusting an air supply volume and an exhaust volume in the test room (1). Each of the air supply passage (21) and the exhaust passage (31) is configured to have a branch section that is branched into two and connected with the test room (1). At one side (21c, 31c) of the branch section, the air supply control valve (23) or the exhaust control valve (33) is provided. At the other side (21d, 31d), auxiliary control valves (24, 34) whose bore diameter is smaller than those of the air supply control valve (23) and the exhaust control valve (33) are provided, respectively.SELECTED DRAWING: Figure 1

Description

本発明は、気圧調整試験室の圧力制御装置に関し、特に、制御精度の向上対策に係るものである。     The present invention relates to a pressure control device for an atmospheric pressure adjustment test chamber, and particularly relates to measures for improving control accuracy.

従来、例えば、自動車等の製造工場では、様々な圧力環境下で製品の耐力や性能等の試験を行うために、気圧調整試験室が設けられている。下記の特許文献1には、例えば、高地等の低圧環境を作り出す低圧試験室の圧力制御装置が提案されている。     2. Description of the Related Art Conventionally, for example, in a manufacturing plant such as an automobile, an atmospheric pressure adjustment test chamber is provided in order to test a product's yield strength and performance under various pressure environments. Patent Document 1 below proposes a pressure control device for a low-pressure test chamber that creates a low-pressure environment such as a highland.

特許文献1の圧力制御装置は、給気ブロアが設けられて低圧試験室に接続された給気通路と、排気ブロアが設けられて低圧試験室に接続された排気通路と、給気通路に設けられた給気制御弁と、排気通路に設けられた排気制御弁とを備えている。そして、該圧力制御装置では、給気制御弁及び排気制御弁の一方の動作を風量が一定になるように制御し、他方の動作を低圧試験室の気圧が目標圧力になるように制御することで、低圧試験室を換気しつつ、該低圧試験室内の気圧を所望の低圧圧力に調整している。     The pressure control device of Patent Document 1 is provided in an air supply passage provided with an air supply blower and connected to a low pressure test chamber, an exhaust passage provided with an exhaust blower and connected to a low pressure test chamber, and an air supply passage. And an exhaust control valve provided in the exhaust passage. In the pressure control device, the operation of one of the air supply control valve and the exhaust control valve is controlled so that the air flow is constant, and the other operation is controlled so that the pressure in the low-pressure test chamber becomes the target pressure. Thus, the air pressure in the low pressure test chamber is adjusted to a desired low pressure while the low pressure test chamber is ventilated.

特開平11−132535号公報Japanese Patent Laid-Open No. 11-132535

ところで、高地(例えば、標高2000m程度)のような低圧環境を作り出す上述の低圧試験室では、気圧を大気圧から数十kPa低下させる必要があり、圧力調整幅が大きい。そのため、給気制御弁及び排気制御弁として、数十kPaの減圧が可能な口径の大きい大容量の制御弁を選定する必要があった。     By the way, in the above-mentioned low-pressure test chamber that creates a low-pressure environment such as an altitude (for example, an altitude of about 2000 m), it is necessary to lower the atmospheric pressure from the atmospheric pressure to several tens of kPa, and the pressure adjustment range is large. Therefore, it is necessary to select a large-capacity control valve having a large diameter that can reduce pressure of several tens of kPa as an air supply control valve and an exhaust control valve.

しかしながら、上述のような大容量の制御弁を用いると、僅かに開度を増減させただけでも低圧試験室内の気圧が大きく変動する。上述のような高地の低圧環境を作り出す低圧試験室では、気圧が0.2kPa程度目標圧力からずれただけで、高度にして数十mの違いとなり、想定した高度から大きくずれてしまう。そのため、大容量の制御弁を用いた上記圧力制御装置では、設定した高度条件に精度良く制御することができなかった。     However, when a large-capacity control valve as described above is used, the air pressure in the low-pressure test chamber varies greatly even if the opening is slightly increased or decreased. In a low-pressure test room that creates a high-pressure environment as described above, if the atmospheric pressure deviates from the target pressure by about 0.2 kPa, the altitude changes by several tens of meters, and deviates greatly from the assumed altitude. For this reason, the pressure control device using a large-capacity control valve cannot accurately control the set altitude conditions.

本発明は、かかる点に鑑みてなされたものであり、その目的は、気圧調整試験室の圧力制御装置に関し、広い圧力調整範囲を確保しつつ制御の精度向上を図ることにある。     This invention is made | formed in view of this point, The objective is related with the pressure control apparatus of an atmospheric pressure adjustment test chamber, and aims at improving the precision of control, ensuring a wide pressure adjustment range.

第1の発明は、外部の空気を試験室(1)に供給する給気通路(21)と、該試験室(1)の空気を外部へ排出する排気通路(31)と、上記給気通路(21)に設けられた給気制御弁(23)と、上記排気通路(31)に設けられた排気制御弁(33)とを備え、上記試験室(1)に対する給気量と排気量とを調節して上記試験室(1)内の気圧を目標圧力に制御する気圧調整試験室の圧力制御装置であって、上記給気通路(21)及び上記排気通路(31)の少なくとも一方は、上記試験室(1)に繋がる一部分が二つに分岐した分岐部に構成され、該分岐部の一方側(21c,31c)に上記給気制御弁(23)又は上記排気制御弁(33)が設けられ、他方側(21d,31d)に上記給気制御弁(23)及び上記排気制御弁(33)よりも口径が小さい補助制御弁(24,34)が設けられている。     The first invention includes an air supply passage (21) for supplying external air to the test chamber (1), an exhaust passage (31) for discharging the air in the test chamber (1) to the outside, and the air supply passage. An air supply control valve (23) provided in (21) and an exhaust control valve (33) provided in the exhaust passage (31), and an air supply amount and an exhaust amount for the test chamber (1); Is a pressure control device of an atmospheric pressure adjustment test chamber for controlling the atmospheric pressure in the test chamber (1) to a target pressure by adjusting at least one of the air supply passage (21) and the exhaust passage (31), A part connected to the test chamber (1) is constituted by a bifurcated branch part, and the supply control valve (23) or the exhaust control valve (33) is provided on one side (21c, 31c) of the branch part. Provided on the other side (21d, 31d) is an auxiliary control valve (24, 34) having a smaller diameter than the air supply control valve (23) and the exhaust control valve (33).

第1の発明では、給気通路(21)及び排気通路(31)の少なくとも一方の試験室(1)に繋がる一部分が二つに分岐した分岐部に構成されている。そして、分岐部の一方側(21c,31c)に大容量の給気制御弁(23)又は排気制御弁(33)が設けられ、他方側(21d,31d)に給気制御弁(23)及び排気制御弁(33)よりも口径の小さい小容量の補助制御弁(24,34)が設けられている。つまり、給気通路(21)及び排気通路(31)の少なくとも一方は、互いに並列に接続された大容量の制御弁(23,33)と小容量の補助制御弁(24,34)とを有している。そのため、上記圧力制御装置(10)では、試験室(1)内の気圧を調整する際に、試験室(1)への給気量と排気量の少なくとも一方が、大容量の制御弁(23,33)と小容量の補助制御弁(24,34)の2種類の制御弁で調節される。     In the first invention, a part of the air supply passage (21) and the exhaust passage (31) connected to at least one of the test chambers (1) is formed as a bifurcated portion. A large-capacity air supply control valve (23) or an exhaust control valve (33) is provided on one side (21c, 31c) of the branch portion, and an air supply control valve (23) and an exhaust control valve (33) on the other side (21d, 31d) A small-capacity auxiliary control valve (24, 34) having a smaller diameter than the exhaust control valve (33) is provided. That is, at least one of the supply passage (21) and the exhaust passage (31) has a large capacity control valve (23, 33) and a small capacity auxiliary control valve (24, 34) connected in parallel to each other. doing. Therefore, in the pressure control device (10), when adjusting the atmospheric pressure in the test chamber (1), at least one of the supply amount and the exhaust amount to the test chamber (1) is a large-capacity control valve (23 , 33) and a small capacity auxiliary control valve (24,34).

第2の発明は、第1の発明において、上記給気通路(21)及び上記排気通路(31)の両方において、上記試験室(1)に繋がる一部分が上記分岐部に構成され、上記給気通路(21)では、上記分岐部の一方側(21c)に上記給気制御弁(23)が設けられ、他方側(21d)に上記補助制御弁(24,34)である補助給気制御弁(24)が設けられ、上記排気通路(31)では、上記分岐部の一方側(31c)に上記排気制御弁(33)が設けられ、他方側(31d)に上記補助制御弁(24,34)である補助排気制御弁(34)が設けられている。     According to a second aspect of the present invention, in the first aspect, in both the air supply passage (21) and the exhaust passage (31), a part connected to the test chamber (1) is configured as the branch portion, and the air supply passage In the passage (21), the air supply control valve (23) is provided on one side (21c) of the branch portion, and the auxiliary air supply control valve is the auxiliary control valve (24, 34) on the other side (21d). (24) is provided, and in the exhaust passage (31), the exhaust control valve (33) is provided on one side (31c) of the branch portion, and the auxiliary control valve (24, 34) is provided on the other side (31d). ) Is an auxiliary exhaust control valve (34).

また、第2の発明では、給気通路(21)及び排気通路(31)の両方において、試験室(1)に繋がる一部分が二つに分岐した分岐部に構成されている。そして、給気通路(21)では、分岐部の一方側(21c,31c)に大容量の給気制御弁(23)が設けられ、他方側(21d,31d)に小容量の補助給気制御弁(24)が設けられている。また、排気通路(31)では、分岐部の一方側(21c,31c)に大容量の排気制御弁(33)が設けられ、他方側(21d,31d)に小容量の補助排気制御弁(34)が設けられている。つまり、給気通路(21)及び排気通路(31)の両方が、互いに並列に接続された大容量の制御弁(23,33)と小容量の補助制御弁(24,34)とを有している。そのため、上記圧力制御装置(10)では、試験室(1)内の気圧を調整する際に、試験室(1)への給気量と排気量の両方が、大容量の制御弁(23,33)と小容量の補助制御弁(24,34)の2種類の制御弁で調節される。     Moreover, in 2nd invention, in both the supply passage (21) and the exhaust passage (31), the part connected to the test chamber (1) is comprised in the branch part branched into two. In the air supply passage (21), a large-capacity air supply control valve (23) is provided on one side (21c, 31c) of the branch portion, and a small-capacity auxiliary air supply control is provided on the other side (21d, 31d). A valve (24) is provided. In the exhaust passage (31), a large-capacity exhaust control valve (33) is provided on one side (21c, 31c) of the branch portion, and a small-capacity auxiliary exhaust control valve (34 on the other side (21d, 31d). ) Is provided. That is, both the supply passage (21) and the exhaust passage (31) have a large capacity control valve (23, 33) and a small capacity auxiliary control valve (24, 34) connected in parallel to each other. ing. Therefore, in the pressure control device (10), when adjusting the atmospheric pressure in the test chamber (1), both the air supply amount and the exhaust amount to the test chamber (1) are controlled by a large capacity control valve (23, 33) and a small capacity auxiliary control valve (24, 34).

第3の発明は、第2の発明において、上記試験室(1)内への給気量が所定流量となるように、上記給気制御弁(23)の開度を調節する風量制御部(43)と、上記試験室(1)内の気圧が上記目標圧力となるように、上記排気制御弁(33)と上記補助給気制御弁(24)と上記補助排気制御弁(34)との開度を調節する圧力制御部(44)とを備えている。     According to a third aspect, in the second aspect, an air volume control unit that adjusts an opening degree of the air supply control valve (23) so that an air supply amount into the test chamber (1) becomes a predetermined flow rate. 43) and the exhaust control valve (33), the auxiliary air supply control valve (24), and the auxiliary exhaust control valve (34) so that the air pressure in the test chamber (1) becomes the target pressure. And a pressure controller (44) for adjusting the opening degree.

第3の発明では、風量制御部(43)が大容量の給気制御弁(23)の開度を調節することによって試験室(1)への給気量を所定流量に制御し、圧力制御部(44)が、大容量の排気制御弁(33)の開度と小容量の補助排気制御弁(34)及び補助給気制御弁(24)の開度とを調節することによって試験室(1)内の気圧が目標圧力となるように試験室(1)からの排気量が制御される。これにより、試験室(1)では、換気が行われつつ気圧が目標圧力に近づく。具体的には、試験室(1)内の気圧を下げる場合、圧力制御部(44)は、風量制御部(43)が制御する給気量よりも排気量の方が多くなるように各制御弁(24,33,34)の開度を調節し、試験室(1)内を減圧する。一方、試験室(1)内の気圧を上げる場合、圧力制御部(44)は、風量制御部(43)が制御する給気量よりも排気量の方が少なくなるように各制御弁(24,33,34)の開度を調節し、試験室(1)内を加圧する。     In the third aspect of the invention, the air volume control unit (43) controls the air supply amount to the test chamber (1) to a predetermined flow rate by adjusting the opening of the large capacity air supply control valve (23), and pressure control. The section (44) adjusts the opening of the large capacity exhaust control valve (33) and the small capacities of the auxiliary exhaust control valve (34) and the auxiliary air supply control valve (24). 1) The exhaust volume from the test chamber (1) is controlled so that the atmospheric pressure in the chamber becomes the target pressure. Thereby, in the test room (1), the atmospheric pressure approaches the target pressure while ventilation is performed. Specifically, when the air pressure in the test chamber (1) is lowered, the pressure control unit (44) controls each exhaust gas amount to be larger than the air supply amount controlled by the air volume control unit (43). Adjust the opening of the valve (24, 33, 34) and depressurize the inside of the test chamber (1). On the other hand, when the pressure in the test chamber (1) is increased, the pressure control unit (44) controls each control valve (24 so that the exhaust amount is smaller than the air supply amount controlled by the air volume control unit (43). , 33,34) and adjust the opening of the test chamber (1).

第1の発明によれば、給気通路(21)及び排気通路(31)の少なくとも一方の試験室(1)に繋がる一部分を二つに分岐した分岐部で構成し、分岐部の一方側(21c,31c)に大容量の給気制御弁(23)又は排気制御弁(33)を設け、他方側(21d,31d)に給気制御弁(23)及び排気制御弁(33)よりも口径の小さい小容量の補助制御弁(24,34)を設けることとした。つまり、給気通路(21)及び排気通路(31)の少なくとも一方が、互いに並列に接続された大容量の制御弁(23,33)と小容量の補助制御弁(24,34)とを有するように構成した。このような構成により、上記圧力制御装置(10)では、試験室(1)内の気圧を調整する際に、試験室(1)への給気量と排気量の少なくとも一方を大容量の制御弁(23,33)と小容量の補助制御弁(24,34)の2種類の制御弁で調節することができる。そのため、上記圧力制御装置(10)によれば、大容量の制御弁(23,33)のみによって給気量及び排気量を調節して気圧を目標圧力に制御する従来の圧力制御装置に比べて、試験室(1)内の気圧を精度良く目標圧力に近づけることができる。つまり、大容量の制御弁(23,33)のみでは、試験室(1)内の気圧が目標圧力付近に到達したものの、それ以上開度を変更すると、オーバーシュートしてしまうところ、小容量の補助制御弁(24,34)の開度を変更することにより、試験室(1)内の気圧を目標圧力に精度良く近づけることができる。     According to the first invention, a part connected to at least one of the test chamber (1) of the air supply passage (21) and the exhaust passage (31) is constituted by a bifurcated branch portion, and one side of the branch portion ( 21c, 31c) is provided with a large capacity air supply control valve (23) or exhaust control valve (33), and the other side (21d, 31d) is larger in diameter than the air supply control valve (23) and exhaust control valve (33) A small-capacity auxiliary control valve (24, 34) is provided. That is, at least one of the supply passage (21) and the exhaust passage (31) has a large capacity control valve (23, 33) and a small capacity auxiliary control valve (24, 34) connected in parallel to each other. It was configured as follows. With such a configuration, the pressure control device (10) has a large capacity control of at least one of the supply amount and the exhaust amount to the test chamber (1) when adjusting the atmospheric pressure in the test chamber (1). Adjustment can be made with two types of control valves, the valve (23, 33) and the small-capacity auxiliary control valve (24, 34). Therefore, according to the pressure control device (10), as compared with the conventional pressure control device that controls the air pressure to the target pressure by adjusting the air supply amount and the exhaust amount only by the large capacity control valve (23, 33). The atmospheric pressure in the test chamber (1) can be brought close to the target pressure with high accuracy. In other words, with only the large-capacity control valve (23, 33), the atmospheric pressure in the test chamber (1) reached near the target pressure, but when the opening was changed further, it would overshoot, but the small-capacity By changing the opening of the auxiliary control valve (24, 34), the atmospheric pressure in the test chamber (1) can be brought close to the target pressure with high accuracy.

また、第2の発明によれば、給気通路(21)及び排気通路(31)の両方が、互いに並列に接続された大容量の制御弁(23,33)と小容量の補助制御弁(24,34)とを有するように構成した。そのため、試験室(1)への給気量と排気量の両方を、大容量の制御弁(23,33)と小容量の補助制御弁(24,34)の2種類の制御弁で調節することができる。これにより、大容量の制御弁(23,33)のみによって給気量及び排気量を調節して気圧を目標圧力に制御する従来の圧力制御装置に比べて、試験室(1)内の気圧を精度良く目標圧力に近づけることができる。また、補助制御弁(24,34)を給気通路(21)と排気通路(31)の両方に設けることとしたため、試験室(1)内の気圧を迅速に目標圧力に近づけることができる。     According to the second aspect of the invention, both the supply passage (21) and the exhaust passage (31) are connected to each other in parallel with a large capacity control valve (23, 33) and a small capacity auxiliary control valve ( 24, 34). Therefore, both the amount of air supplied to the test chamber (1) and the amount of exhaust are adjusted with two types of control valves: a large capacity control valve (23,33) and a small capacity auxiliary control valve (24,34). be able to. As a result, the air pressure in the test chamber (1) can be reduced compared to the conventional pressure control device that controls the air pressure to the target pressure by adjusting the supply air amount and the exhaust air amount only with a large-capacity control valve (23, 33). The target pressure can be accurately approached. Further, since the auxiliary control valves (24, 34) are provided in both the air supply passage (21) and the exhaust passage (31), the air pressure in the test chamber (1) can be brought close to the target pressure quickly.

また、第3の発明によれば、給気通路(21)と排気通路(31)のそれぞれに設けた2つの大容量の制御弁(23,33)のうち、一方の給気制御弁(23)を、試験室(1)内への給気量を一定流量に制御する風量制御に用い、他方の排気制御弁(33)と小容量の2つの補助制御弁(24,34)とを、試験室(1)内の気圧を目標圧力に制御する圧力制御に用いることとした。このように、給気通路(21)と排気通路(31)のそれぞれに設けた2つの大容量の制御弁(23,33)のうち、一方の給気制御弁(23)で試験室(1)内への給気量を一定流量に制御することにより、試験室(1)における換気風量として所定流量分(給気量分)を容易に確保することができる。また、上記2つの大容量の制御弁(23,33)のうちの他方の排気制御弁(33)と2つの小容量の補助制御弁(24,34)とで試験室(1)内の気圧を目標圧力に制御することにより、大容量の制御弁(23,33)のみによって給気量及び排気量を調節して気圧を目標圧力に制御する従来の圧力制御装置に比べて、試験室(1)内の気圧を精度良く目標圧力に近づけることができる。また、給気通路(21)と排気通路(31)のそれぞれに設けた2つの小容量の補助制御弁(24,34)を用いることにより、試験室(1)内の気圧を迅速に目標圧力に近づけることができる。     According to the third aspect of the present invention, one of the two large capacity control valves (23, 33) provided in each of the air supply passage (21) and the exhaust passage (31) is provided with one air supply control valve (23 ) Is used for air flow control to control the amount of air supplied into the test chamber (1) to a constant flow rate, and the other exhaust control valve (33) and two small capacity auxiliary control valves (24, 34) We decided to use it for pressure control to control the atmospheric pressure in the test chamber (1) to the target pressure. Thus, one of the two large-capacity control valves (23, 33) provided in each of the air supply passage (21) and the exhaust passage (31) is connected to the test chamber (1 ) By controlling the air supply amount into the constant flow rate, a predetermined flow rate (air supply amount) can be easily secured as the ventilation air flow rate in the test chamber (1). The other exhaust control valve (33) of the two large-capacity control valves (23, 33) and the two small-capacity auxiliary control valves (24, 34) are used for the atmospheric pressure in the test chamber (1). Compared to a conventional pressure control device that controls the air pressure to the target pressure by adjusting the supply air amount and the exhaust air amount only by a large-capacity control valve (23,33) 1) The internal pressure can be accurately approximated to the target pressure. Also, by using two small-capacity auxiliary control valves (24, 34) provided in each of the air supply passage (21) and the exhaust passage (31), the air pressure in the test chamber (1) can be quickly adjusted to the target pressure. Can be approached.

図1は、実施形態1に係る気圧調節試験室の圧力制御装置の概略構成図である。FIG. 1 is a schematic configuration diagram of a pressure control device for an atmospheric pressure control test chamber according to the first embodiment. 図2は、補助給気制御弁及び補助排気制御弁の開度と気圧調節試験室内の気圧との相関を示すグラフである。FIG. 2 is a graph showing a correlation between the opening degree of the auxiliary air supply control valve and the auxiliary exhaust control valve and the atmospheric pressure in the atmospheric pressure adjustment test chamber.

以下、本発明の実施形態を図面に基づいて詳細に説明する。     Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

《発明の実施形態1》
図1は、本発明の実施形態1に係る気圧調節試験室の圧力制御装置(10)を示している。本実施形態では、圧力制御装置(10)は、自動車のエンジンの耐力や性能等の試験を行う試験室(1)に設けられ、該試験室(1)内の気圧Pを、例えば、高地2000mの低圧環境(79.5kPa)や逆の高圧環境に調整するものである。
Embodiment 1 of the Invention
FIG. 1 shows a pressure control device (10) of an atmospheric pressure control test chamber according to Embodiment 1 of the present invention. In this embodiment, the pressure control device (10) is provided in a test chamber (1) for performing tests such as the proof strength and performance of an automobile engine, and the atmospheric pressure P in the test chamber (1) is set to, for example, a high altitude of 2000 m. The low-pressure environment (79.5 kPa) and the opposite high-pressure environment are adjusted.

−構成−
図1に示すように、圧力制御装置(10)は、試験室(1)内へ外部の空気を供給する給気部(20)と、試験室(1)内の空気を外部へ排出する排気部(30)と、給気部(20)と排気部(30)の動作を制御する制御部(40)とを備えている。
−Configuration−
As shown in FIG. 1, the pressure control device (10) includes an air supply unit (20) that supplies external air into the test chamber (1), and an exhaust that discharges air from the test chamber (1) to the outside. And a control unit (40) for controlling the operation of the air supply unit (20) and the exhaust unit (30).

〈給気部の構成〉
給気部(20)は、給気通路(21)と、給気ファン(22)と、給気制御弁(23)と、補助給気制御弁(24)とを備えている。
<Structure of air supply unit>
The air supply unit (20) includes an air supply passage (21), an air supply fan (22), an air supply control valve (23), and an auxiliary air supply control valve (24).

給気通路(21)は、本体部(21a)とヘッダ(21b)と第1分岐管(21c)と第2分岐管(21d)とを有し、試験室(1)の内部と外部とを繋いでいる。     The air supply passage (21) has a main body (21a), a header (21b), a first branch pipe (21c), and a second branch pipe (21d), and connects the inside and outside of the test chamber (1). Are connected.

本体部(21a)は、内部に空気が流通する管状部材によって構成され、一端が試験室(1)の外部に開口し、他端はヘッダ(21b)の流入口(P1)に接続されている。     The main body (21a) is constituted by a tubular member through which air flows, and one end opens to the outside of the test chamber (1) and the other end is connected to the inlet (P1) of the header (21b). .

ヘッダ(21b)は、内部で二叉に分かれる分流通路が形成され、一つの流入口(P1)から内部に流入した空気を二つの流出口(P2,P3)に向かって分流するように構成されている。ヘッダ(21b)の一方の流出口(P2)には、第1分岐管(21c)の一端が接続され、他方の流出口(P3)には、第2分岐管(21d)の一端が接続されている。     The header (21b) is formed with a diversion passage that divides into two in the interior, and is configured to divert the air flowing into the inside from one inlet (P1) toward the two outlets (P2, P3) Has been. One end of the first branch pipe (21c) is connected to one outlet (P2) of the header (21b), and one end of the second branch pipe (21d) is connected to the other outlet (P3). ing.

第1分岐管(21c)及び第2分岐管(21d)は、いずれも内部に空気が流通する管状部材によって構成され、上記ヘッダ(21b)に接続された一端と逆側の他端が、それぞれ試験室(1)の内部において開口している。なお、第1分岐管(21c)は、第2分岐管(21d)よりも大口径の管状部材によって構成されている。     Each of the first branch pipe (21c) and the second branch pipe (21d) is constituted by a tubular member through which air flows, and one end connected to the header (21b) and the other end on the opposite side are respectively Open in the test chamber (1). The first branch pipe (21c) is configured by a tubular member having a larger diameter than the second branch pipe (21d).

このような構成により、給気通路(21)は、試験室(1)に繋がる一部分が二つに分岐した分岐部に構成されている。第1分岐管(21c)及び第2分岐管(21d)によって給気通路(21)の分岐部が構成されている。     With such a configuration, the air supply passage (21) is configured as a branch portion in which a part connected to the test chamber (1) is branched into two. The first branch pipe (21c) and the second branch pipe (21d) constitute a branch portion of the air supply passage (21).

給気ファン(22)は、給気通路(21)の本体部(21a)の中途部に設けられている。給気ファン(22)は、図示しないファンモータに電力を供給するインバータ(22a)を有し、回転周波数が変更可能に構成されている。     The air supply fan (22) is provided in the middle of the main body (21a) of the air supply passage (21). The air supply fan (22) includes an inverter (22a) that supplies electric power to a fan motor (not shown), and is configured to be able to change the rotation frequency.

給気制御弁(23)は、第1分岐管(21c)の中途部に設けられ、補助給気制御弁(24)は、第2分岐管(21d)の中途部に設けられている。給気制御弁(23)は、開度可変バルブであって、数十kPaの圧力調整に必要な流量範囲を有するバルブによって構成されている。補助給気制御弁(24)も開度可変バルブによって構成されている。具体的には、補助給気制御弁(24)は、給気制御弁(23)の5分の1以下の口径の開度可変バルブによって構成されている。     The air supply control valve (23) is provided in the middle of the first branch pipe (21c), and the auxiliary air supply control valve (24) is provided in the middle of the second branch pipe (21d). The air supply control valve (23) is a variable opening valve, and is constituted by a valve having a flow rate range necessary for pressure adjustment of several tens of kPa. The auxiliary air supply control valve (24) is also composed of a variable opening valve. Specifically, the auxiliary air supply control valve (24) is constituted by a variable opening valve having a diameter of 1/5 or less of the air supply control valve (23).

〈排気部の構成〉
排気部(30)は、排気通路(31)と、排気ファン(32)と、排気制御弁(33)と、補助排気制御弁(34)とを備えている。
<Exhaust configuration>
The exhaust part (30) includes an exhaust passage (31), an exhaust fan (32), an exhaust control valve (33), and an auxiliary exhaust control valve (34).

排気通路(31)は、本体部(31a)とヘッダ(31b)と第1分岐管(31c)と第2分岐管(31d)とを有し、試験室(1)の内部と外部とを繋いでいる。     The exhaust passage (31) has a main body (31a), a header (31b), a first branch pipe (31c), and a second branch pipe (31d), and connects the inside and the outside of the test chamber (1). It is out.

本体部(31a)は、内部に空気が流通する管状部材によって構成され、一端が上記ヘッダ(31b)の流出口(P13)に接続される一方、他端は試験室(1)の外部に開口している。     The main body (31a) is composed of a tubular member through which air flows, and one end is connected to the outlet (P13) of the header (31b), while the other end is open to the outside of the test chamber (1). doing.

ヘッダ(31b)は、内部で二叉通路が一つに合流する合流通路が形成され、二つの流入口(P11,P12)から内部に流入した空気を一つの流出口(P13)に向かって合流させるように構成されている。ヘッダ(31b)の流出口(P13)には、本体部(31a)の一端が接続されている。     The header (31b) is formed with a confluence passage where two forked passages merge together, and the air flowing in from the two inflow ports (P11, P12) is merged toward one outflow port (P13) It is configured to let you. One end of the main body (31a) is connected to the outlet (P13) of the header (31b).

第1分岐管(31c)及び第2分岐管(31d)は、いずれも内部に空気が流通する管状部材によって構成され、それぞれ一端が試験室(1)の内部において開口し、他端がヘッダ(31b)に接続されている。具体的には、第1分岐管(31c)の一端がヘッダ(31b)の一方の流入口(P11)に接続され、第2分岐管(31d)の一端が他方の流入口(P12)に接続されている。なお、第1分岐管(31c)は、第2分岐管(31d)よりも大口径の管状部材によって構成されている。     Each of the first branch pipe (31c) and the second branch pipe (31d) is constituted by a tubular member through which air flows, and one end opens inside the test chamber (1) and the other end is a header ( 31b). Specifically, one end of the first branch pipe (31c) is connected to one inlet (P11) of the header (31b), and one end of the second branch pipe (31d) is connected to the other inlet (P12). Has been. The first branch pipe (31c) is configured by a tubular member having a larger diameter than the second branch pipe (31d).

このような構成により、排気通路(31)は、試験室(1)に繋がる一部分が二つに分岐した分岐部に構成されている。第1分岐管(31c)及び第2分岐管(31d)によって排気通路(31)の分岐部が構成されている。     With such a configuration, the exhaust passage (31) is configured as a branched portion in which a part connected to the test chamber (1) is branched in two. A branch portion of the exhaust passage (31) is constituted by the first branch pipe (31c) and the second branch pipe (31d).

排気ファン(32)は、排気通路(31)の本体部(31a)の中途部に設けられている。排気ファン(32)は、図示しないファンモータに電力を供給するインバータ(32a)を有し、回転周波数が変更可能に構成されている。     The exhaust fan (32) is provided in the middle of the main body (31a) of the exhaust passage (31). The exhaust fan (32) includes an inverter (32a) that supplies power to a fan motor (not shown), and is configured to be able to change the rotation frequency.

排気制御弁(33)は、第1分岐管(31c)の中途部に設けられ、補助排気制御弁(34)は、第2分岐管(31d)の中途部に設けられている。排気制御弁(33)は、開度可変バルブであって、数十kPaの圧力調整に必要な流量範囲を有するバルブによって構成されている。補助排気制御弁(34)も開度可変バルブによって構成されている。具体的には、補助排気制御弁(34)は、排気制御弁(33)の5分の1以下の口径の開度可変バルブによって構成されている。     The exhaust control valve (33) is provided in the middle of the first branch pipe (31c), and the auxiliary exhaust control valve (34) is provided in the middle of the second branch pipe (31d). The exhaust control valve (33) is an opening variable valve, and is configured by a valve having a flow rate range necessary for pressure adjustment of several tens of kPa. The auxiliary exhaust control valve (34) is also constituted by a variable opening valve. Specifically, the auxiliary exhaust control valve (34) is constituted by a variable opening valve having a diameter of 1/5 or less of the exhaust control valve (33).

〈制御部の構成〉
制御部(40)は、給気ファン制御部(41)と、排気ファン制御部(42)と、風量制御部(43)と、圧力制御部(44)とを有している。制御部(40)は、給気ファン(22)、排気ファン(32)、給気制御弁(23)、補助給気制御弁(24)、排気制御弁(33)及び補助排気制御弁(34)の動作を制御することにより、試験室(1)の換気を行うと共に内部の気圧を所望の圧力に制御する。本実施形態では、制御部(40)は、圧力制御装置(10)の各要素を本願で開示するように制御するマイクロコンピュータと、実施可能な制御プログラムが記憶されたメモリやハードディスク等とを含んでいる。なお、ここで説明する制御部(40)は、圧力制御装置(10)の制御部の一例であり、制御部(40)の詳細な構造やアルゴリズムは、本発明に係る機能を実行するどのようなハードウェアとソフトウェアとの組み合わせであってもよい。
<Configuration of control unit>
The control unit (40) includes an air supply fan control unit (41), an exhaust fan control unit (42), an air volume control unit (43), and a pressure control unit (44). The control unit (40) includes an air supply fan (22), an exhaust fan (32), an air supply control valve (23), an auxiliary air supply control valve (24), an exhaust control valve (33), and an auxiliary exhaust control valve (34 ) To control the ventilation of the test chamber (1) and control the internal atmospheric pressure to a desired pressure. In the present embodiment, the control unit (40) includes a microcomputer that controls each element of the pressure control device (10) as disclosed in the present application, and a memory, a hard disk, and the like in which an executable control program is stored. It is out. The control unit (40) described here is an example of the control unit of the pressure control device (10), and the detailed structure and algorithm of the control unit (40) are used to execute the function according to the present invention. It may be a combination of hardware and software.

給気ファン制御部(41)は、インバータ(22a)によって給気ファン(22)のファンモータに供給される電力を制御することで、給気ファン(22)の回転周波数を制御するように構成されている。具体的には、給気ファン制御部(41)は、給気ファン(22)の回転周波数が、試験室(1)の必要換気量に応じて予め決定された一定の回転周波数になるように、インバータ(22a)によって給気ファン(22)のファンモータに供給される電力を制御するように構成されている。     The air supply fan control unit (41) is configured to control the rotation frequency of the air supply fan (22) by controlling the electric power supplied to the fan motor of the air supply fan (22) by the inverter (22a). Has been. Specifically, the air supply fan control unit (41) adjusts the rotational frequency of the air supply fan (22) to a predetermined rotational frequency that is determined in advance according to the required ventilation amount of the test chamber (1). The electric power supplied to the fan motor of the air supply fan (22) is controlled by the inverter (22a).

排気ファン制御部(42)は、インバータ(32a)によって排気ファン(32)のファンモータに供給される電力を制御することで、排気ファン(32)の回転周波数を制御するように構成されている。具体的には、排気ファン制御部(42)は、排気ファン(32)の回転周波数が、試験室(1)の必要換気量に応じて予め決定された一定の回転周波数になるように、インバータ(32a)によって排気ファン(32)のファンモータに供給される電力を制御するように構成されている。     The exhaust fan control unit (42) is configured to control the rotational frequency of the exhaust fan (32) by controlling the power supplied to the fan motor of the exhaust fan (32) by the inverter (32a). . Specifically, the exhaust fan control unit (42) is connected to the inverter so that the rotation frequency of the exhaust fan (32) becomes a predetermined rotation frequency determined in advance according to the required ventilation amount of the test chamber (1). The electric power supplied to the fan motor of the exhaust fan (32) is controlled by (32a).

風量制御部(43)は、本実施形態では、給気通路(21)を通じて試験室(1)に供給される空気量(給気量)が、試験室(1)の必要換気量に応じて予め決定された一定の風量となるように、給気制御弁(23)の開度を制御するように構成されている。     In this embodiment, the air volume control unit (43) is configured so that the amount of air supplied to the test chamber (1) through the air supply passage (21) (supply amount) depends on the required ventilation volume of the test chamber (1). The opening degree of the air supply control valve (23) is controlled so as to obtain a predetermined air volume determined in advance.

圧力制御部(44)は、本実施形態では、試験室(1)内の気圧Pが所定の目標圧力SPとなるように、排気制御弁(33)と補助給気制御弁(24)と補助排気制御弁(34)の開度を制御するように構成されている。     In this embodiment, the pressure control unit (44) is connected to the exhaust control valve (33), the auxiliary air supply control valve (24), and the auxiliary so that the atmospheric pressure P in the test chamber (1) becomes a predetermined target pressure SP. The opening degree of the exhaust control valve (34) is controlled.

ここで、試験室(1)内には、該試験室(1)内の気圧Pを測定する気圧測定センサ(50)が設けられている。気圧測定センサ(50)は、有線又は無線で電気通信可能に制御部(40)に接続され、測定値(試験室(1)内の気圧P)を制御部(40)に送信するように構成されている。     Here, an atmospheric pressure sensor (50) for measuring the atmospheric pressure P in the test chamber (1) is provided in the test chamber (1). The atmospheric pressure measurement sensor (50) is connected to the control unit (40) so as to be capable of electrical communication by wire or wirelessly, and is configured to transmit a measured value (atmospheric pressure P in the test chamber (1)) to the control unit (40). Has been.

上記圧力制御部(44)は、この気圧測定センサ(50)の測定値(試験室(1)内の気圧P)が所定の目標圧力SPとなるように、排気制御弁(33)と補助給気制御弁(24)と補助排気制御弁(34)の開度を制御するように構成されている。圧力制御部(44)は、排気制御弁(33)の開度制御と、補助給気制御弁(24)及び補助排気制御弁(34)の開度制御とを、それぞれの制御によって試験室(1)内の気圧Pが所定の目標圧力SPとなるように別々に行う。     The pressure control unit (44) is connected to the exhaust control valve (33) and the auxiliary supply so that the measured value (atmospheric pressure P in the test chamber (1)) of the atmospheric pressure measuring sensor (50) becomes a predetermined target pressure SP. The opening of the air control valve (24) and the auxiliary exhaust control valve (34) is controlled. The pressure control unit (44) controls the opening degree of the exhaust control valve (33) and the opening degree control of the auxiliary air supply control valve (24) and the auxiliary exhaust control valve (34) according to each control. 1) Perform separately so that the atmospheric pressure P is a predetermined target pressure SP.

圧力制御部(44)は、試験室(1)内の気圧Pが目標圧力SPよりも高い場合、排気制御弁(33)の開度を増大させ、試験室(1)内の気圧Pが目標圧力SPよりも低い場合、排気制御弁(33)の開度を低減する。なお、詳細については後述するが、排気制御弁(33)は、補助給気制御弁(24)及び補助排気制御弁(34)の口径の5倍の口径を有する大容量の開度可変バルブであるため、僅かに開度を増減させただけで試験室(1)内の気圧Pが大きく変動する。そのため、図2に示すように、排気制御弁(33)の開度制御だけでは、試験室(1)内の気圧Pを目標圧力SPに精度良く近づけることができず、試験室(1)内の気圧Pが目標圧力SPを含むP1<P<P2(P1=SP−0.2kPa、P2=SP+0.2kPa)の範囲を飛び越えて増加したり、減少したりする。     When the atmospheric pressure P in the test chamber (1) is higher than the target pressure SP, the pressure control unit (44) increases the opening of the exhaust control valve (33), and the atmospheric pressure P in the test chamber (1) is the target. When the pressure is lower than the pressure SP, the opening degree of the exhaust control valve (33) is reduced. Although the details will be described later, the exhaust control valve (33) is a large-capacity opening variable valve having a diameter five times that of the auxiliary air supply control valve (24) and the auxiliary exhaust control valve (34). Therefore, the atmospheric pressure P in the test chamber (1) fluctuates greatly only by slightly increasing or decreasing the opening degree. Therefore, as shown in FIG. 2, the pressure P in the test chamber (1) cannot be brought close to the target pressure SP with high accuracy only by controlling the opening of the exhaust control valve (33). The atmospheric pressure P increases or decreases over the range of P1 <P <P2 (P1 = SP−0.2 kPa, P2 = SP + 0.2 kPa) including the target pressure SP.

また、圧力制御部(44)は、図2に示すように、試験室(1)内の気圧Pが目標圧力SPとなるように、補助給気制御弁(24)及び補助排気制御弁(34)の開度を制御する。なお、図2は、試験室(1)内の気圧Pと補助給気制御弁(24)及び補助排気制御弁(34)の開度との相関を示すグラフである。図2のグラフにおいて、縦軸は、弁開度を示し、上側ほど開度が大きく、下側ほど開度が小さい状態を示している。一方、横軸は、試験室(1)内の気圧を示し、右側ほど気圧が高く、左側ほど気圧が低い状態を示し、P1<P11<P12<SP<P13<P14<P2となっている。     Further, as shown in FIG. 2, the pressure control unit (44) is configured to supply the auxiliary air supply control valve (24) and the auxiliary exhaust control valve (34) so that the air pressure P in the test chamber (1) becomes the target pressure SP. ) Is controlled. FIG. 2 is a graph showing the correlation between the pressure P in the test chamber (1) and the openings of the auxiliary air supply control valve (24) and the auxiliary exhaust control valve (34). In the graph of FIG. 2, the vertical axis indicates the valve opening, and the opening is larger toward the upper side and smaller at the lower side. On the other hand, the horizontal axis indicates the atmospheric pressure in the test chamber (1). The pressure on the right side is higher and the pressure on the left side is lower. P1 <P11 <P12 <SP <P13 <P14 <P2.

圧力制御部(44)は、試験室(1)内の気圧PがP11よりも低い場合、補助給気制御弁(24)を全開に制御する。そして、圧力制御部(44)は、試験室(1)内の気圧PがP11とP13との間である場合に、補助給気制御弁(24)の開度を増減させる。具体的には、圧力制御部(44)は、試験室(1)内の気圧Pの低下時(減圧時)には、補助給気制御弁(24)の開度を増大し、試験室(1)内の気圧Pの上昇時(加圧時)には、補助給気制御弁(24)の開度を低減する。また、圧力制御部(44)は、試験室(1)内の気圧PがP13よりも高い場合、補助給気制御弁(24)を全閉に制御する。     The pressure control unit (44) controls the auxiliary air supply control valve (24) to be fully opened when the atmospheric pressure P in the test chamber (1) is lower than P11. The pressure control unit (44) increases or decreases the opening of the auxiliary air supply control valve (24) when the atmospheric pressure P in the test chamber (1) is between P11 and P13. Specifically, the pressure control unit (44) increases the opening of the auxiliary air supply control valve (24) when the atmospheric pressure P in the test chamber (1) decreases (when the pressure is reduced). 1) When the atmospheric pressure P is increased (pressurization), the opening of the auxiliary air supply control valve (24) is reduced. Further, the pressure control unit (44) controls the auxiliary air supply control valve (24) to be fully closed when the atmospheric pressure P in the test chamber (1) is higher than P13.

一方、圧力制御部(44)は、試験室(1)内の気圧PがP12よりも低い場合、補助排気制御弁(34)を全閉に制御する。そして、圧力制御部(44)は、試験室(1)内の気圧PがP12とPA14との間である場合に、補助排気制御弁(34)の開度を増減させる。具体的には、圧力制御部(44)は、試験室(1)内の気圧Pの低下時(減圧時)には、補助排気制御弁(34)の開度を低減し、試験室(1)内の気圧Pの上昇時(加圧時)には、補助排気制御弁(34)の開度を増大する。また、圧力制御部(44)は、試験室(1)内の気圧PがP14よりも高い場合、補助排気制御弁(34)を全開に制御する。     On the other hand, when the atmospheric pressure P in the test chamber (1) is lower than P12, the pressure control unit (44) controls the auxiliary exhaust control valve (34) to be fully closed. The pressure control unit (44) increases or decreases the opening degree of the auxiliary exhaust control valve (34) when the atmospheric pressure P in the test chamber (1) is between P12 and PA14. Specifically, the pressure control unit (44) reduces the opening of the auxiliary exhaust control valve (34) when the pressure P in the test chamber (1) decreases (when the pressure is reduced), When the atmospheric pressure P is increased (pressurization), the opening degree of the auxiliary exhaust control valve (34) is increased. Further, when the atmospheric pressure P in the test chamber (1) is higher than P14, the pressure control unit (44) controls the auxiliary exhaust control valve (34) to be fully opened.

−運転動作−
以下では、試験室(1)内の気圧Pを目標圧力SPに調節する運転動作の一例として、試験室(1)内の気圧Pが、目標圧力SPよりも高く、その偏差が0.2kPaより大きい場合、即ち、図2におけるP2(=SP+0.2kPa)よりも高い場合に、試験室(1)内の気圧Pを減圧して目標圧力SPに調節する動作について説明する。
-Driving action-
In the following, as an example of an operation for adjusting the pressure P in the test chamber (1) to the target pressure SP, the pressure P in the test chamber (1) is higher than the target pressure SP, and the deviation is 0.2 kPa. When the pressure is larger, that is, higher than P2 (= SP + 0.2 kPa) in FIG. 2, the operation of reducing the pressure P in the test chamber (1) to the target pressure SP will be described.

まず、給気ファン制御部(41)及び排気ファン制御部(42)により、給気ファン(22)及び排気ファン(32)のそれぞれの回転周波数が、試験室(1)の必要換気量に応じて予め決定された一定の回転周波数になるように、各インバータ(22a,32a)によってファンモータに供給される電力が制御される。     First, the supply fan control unit (41) and the exhaust fan control unit (42) allow the rotational frequency of the supply fan (22) and the exhaust fan (32) to correspond to the required ventilation volume in the test chamber (1). Thus, the electric power supplied to the fan motor is controlled by each inverter (22a, 32a) so as to have a predetermined rotational frequency.

また、風量制御部(43)によって、給気通路(21)を通じて試験室(1)に供給される空気量(給気量)が、試験室(1)の必要換気量に応じて予め決定された一定の風量となるように、給気制御弁(23)の開度が制御される。     In addition, the air volume control unit (43) predetermines the air volume (air supply volume) supplied to the test chamber (1) through the air supply passage (21) according to the required ventilation volume of the test chamber (1). The opening degree of the air supply control valve (23) is controlled so that the air volume is constant.

さらに、圧力制御部(44)によって、気圧測定センサ(50)の測定値(試験室(1)内の気圧P)が所定の目標圧力SPとなるように、排気制御弁(33)と補助給気制御弁(24)と補助排気制御弁(34)の開度が制御される。なお、圧力制御部(44)は、排気制御弁(33)の開度制御と、補助給気制御弁(24)及び補助排気制御弁(34)の開度制御とを別々に行う。以下、圧力制御部(44)による排気制御弁(33)の開度制御と補助給気制御弁(24)及び補助排気制御弁(34)の開度制御とについて説明する。     Further, the pressure control unit (44) and the exhaust control valve (33) are connected to the auxiliary supply so that the measured value of the atmospheric pressure sensor (50) (the atmospheric pressure P in the test chamber (1)) becomes a predetermined target pressure SP. The opening degree of the air control valve (24) and the auxiliary exhaust control valve (34) is controlled. The pressure controller (44) separately performs the opening control of the exhaust control valve (33) and the opening control of the auxiliary air supply control valve (24) and the auxiliary exhaust control valve (34). Hereinafter, the opening control of the exhaust control valve (33) by the pressure control unit (44) and the opening control of the auxiliary air supply control valve (24) and the auxiliary exhaust control valve (34) will be described.

まず、圧力制御部(44)は、排気制御弁(33)の開度制御に際し、試験室(1)内の気圧Pが所定の目標圧力SPとなるように、排気制御弁(33)の開度を増減する。この例では、運転開始時の試験室(1)内の気圧PがP2よりも高いため、圧力制御部(44)は、まず、排気制御弁(33)の開度を増大させる。これにより、試験室(1)内から排気通路(31)を介して外部へ排出される空気量(排気量)が増え、試験室(1)内の気圧Pが低下する。     First, the pressure control unit (44) opens the exhaust control valve (33) so that the pressure P in the test chamber (1) becomes a predetermined target pressure SP when controlling the opening degree of the exhaust control valve (33). Increase or decrease the degree. In this example, since the atmospheric pressure P in the test chamber (1) at the start of operation is higher than P2, the pressure control unit (44) first increases the opening of the exhaust control valve (33). As a result, the amount of air (exhaust amount) discharged from the test chamber (1) to the outside through the exhaust passage (31) increases, and the pressure P in the test chamber (1) decreases.

なお、このとき、圧力制御部(44)は、補助給気制御弁(24)及び補助排気制御弁(34)の開度制御に関わりなく、気圧測定センサ(50)の測定値に基づいてのみ制御値を決定する。これは、補助給気制御弁(24)及び補助排気制御弁(34)が、排気制御弁(33)の5分の1以下の口径の開度可変バルブによって構成されているために、補助給気制御弁(24)及び補助排気制御弁(34)の開度の変化による試験室(1)内の気圧P変動は、排気制御弁(33)の開度の変化による試験室(1)内の気圧P変動に比べて僅かなものであり、補助給気制御弁(24)及び補助排気制御弁(34)の開度が変化したところで、排気制御弁(33)の開度制御に影響を与えないためである。     At this time, the pressure control unit (44) is based only on the measured value of the atmospheric pressure measurement sensor (50) regardless of the opening control of the auxiliary air supply control valve (24) and the auxiliary exhaust control valve (34). Determine the control value. This is because the auxiliary air supply control valve (24) and the auxiliary exhaust control valve (34) are constituted by variable opening valves having a caliber of one-fifth or less of the exhaust control valve (33). The pressure P fluctuation in the test chamber (1) due to changes in the opening of the air control valve (24) and the auxiliary exhaust control valve (34) is caused by the change in the opening of the exhaust control valve (33) in the test chamber (1). This is a slight change compared to the atmospheric pressure P, and when the opening of the auxiliary air supply control valve (24) and auxiliary exhaust control valve (34) changes, it affects the opening control of the exhaust control valve (33). It is because it does not give.

このとき、圧力制御部(44)は、図2に示すように、補助給気制御弁(24)を全閉状態に制御し、補助排気制御弁(34)を全開状態に制御する。     At this time, as shown in FIG. 2, the pressure control unit (44) controls the auxiliary air supply control valve (24) to a fully closed state and controls the auxiliary exhaust control valve (34) to a fully open state.

ところで、上述したように、補助給気制御弁(24)及び補助排気制御弁(34)は、排気制御弁(33)の5分の1以下の口径の開度可変バルブによって構成され、その開度の変化による試験室(1)内の気圧P変動が、排気制御弁(33)の開度の変化による試験室(1)内の気圧P変動に比べて僅かなものである。そのため、試験室(1)内の気圧Pが目標圧力SPにある程度近づく(例えば、P2まで低下する)までは、排気制御弁(33)の開度を増大させることによって、試験室(1)内の気圧Pが速やかに低下する。     By the way, as described above, the auxiliary air supply control valve (24) and the auxiliary exhaust control valve (34) are constituted by opening variable valves having a caliber equal to or less than one fifth of the exhaust control valve (33). The pressure P fluctuation in the test chamber (1) due to the change in the degree is slight compared with the pressure P fluctuation in the test chamber (1) due to the change in the opening degree of the exhaust control valve (33). Therefore, by increasing the opening degree of the exhaust control valve (33) until the atmospheric pressure P in the test chamber (1) approaches the target pressure SP to some extent (for example, decreases to P2), the inside of the test chamber (1) is increased. The pressure P of the water quickly decreases.

一方、試験室(1)内の気圧PがP2より低下すると、大容量の排気制御弁(33)の開度制御のみでは僅かな開度変更でも試験室(1)内の気圧Pが大きく変動するため、目標圧力SPを大きく超えてしまう(オーバーシュートする)おそれがある。そこで、圧力制御部(44)は、補助給気制御弁(24)及び補助排気制御弁(34)の開度を変更することによって、試験室(1)内の気圧Pを目標圧力SPに近づける。     On the other hand, when the atmospheric pressure P in the test chamber (1) falls below P2, the atmospheric pressure P in the test chamber (1) fluctuates greatly even with a slight opening change by controlling the opening of the large-capacity exhaust control valve (33). Therefore, the target pressure SP may be greatly exceeded (overshoot). Therefore, the pressure control unit (44) brings the atmospheric pressure P in the test chamber (1) closer to the target pressure SP by changing the openings of the auxiliary air supply control valve (24) and the auxiliary exhaust control valve (34). .

具体的には、図2に示すように、圧力制御部(44)は、試験室(1)内の気圧PがP14に到達するまで、補助給気制御弁(24)を全閉状態に維持すると共に補助排気制御弁(34)を全開状態に維持する。このとき、試験室(1)からの排気量が給気量を上回っているため、試験室(1)内の気圧Pが低下する。     Specifically, as shown in FIG. 2, the pressure controller (44) maintains the auxiliary air supply control valve (24) in a fully closed state until the atmospheric pressure P in the test chamber (1) reaches P14. At the same time, the auxiliary exhaust control valve (34) is kept fully open. At this time, since the exhaust amount from the test chamber (1) exceeds the air supply amount, the atmospheric pressure P in the test chamber (1) decreases.

試験室(1)内の気圧PがP14まで低下すると、圧力制御部(44)は、補助排気制御弁(34)の開度を全開状態から低減していく。これにより、試験室(1)からの排気量が僅かに減るため、試験室(1)内の気圧Pの低下速度が緩やかになる。     When the atmospheric pressure P in the test chamber (1) decreases to P14, the pressure control unit (44) reduces the opening of the auxiliary exhaust control valve (34) from the fully open state. As a result, the amount of exhaust from the test chamber (1) is slightly reduced, and the rate of decrease in the pressure P in the test chamber (1) is moderated.

試験室(1)内の気圧PがP13まで低下すると、圧力制御部(44)は、補助排気制御弁(34)の開度を低減しつつ、補助給気制御弁(24)の開度を増大していく。これにより、試験室(1)からの排気量が僅かに減りつつ、給気量が僅かに増えるため、試験室(1)内の気圧Pの低下速度がさらに緩やかになる。     When the atmospheric pressure P in the test chamber (1) decreases to P13, the pressure control unit (44) reduces the opening degree of the auxiliary exhaust control valve (34) and reduces the opening degree of the auxiliary air supply control valve (24). It will increase. As a result, the amount of exhaust air from the test chamber (1) is slightly reduced and the amount of air supply is slightly increased, so that the rate of decrease in the pressure P in the test chamber (1) is further moderated.

このように、圧力制御部(44)は、試験室(1)からの排気量が給気量を上回る状態で、試験室(1)内の気圧Pの低下に伴って、排気量を僅かに減らし、給気量を僅かに増やして給気量と排気量のバランスを変更しながら、試験室(1)内の気圧Pを目標圧力SPに近づけていく。     As described above, the pressure control unit (44) slightly reduces the exhaust amount as the pressure P in the test chamber (1) decreases while the exhaust amount from the test chamber (1) exceeds the supply amount. The air pressure P in the test chamber (1) is brought closer to the target pressure SP while decreasing and increasing the air supply amount slightly to change the balance between the air supply amount and the exhaust amount.

そして、試験室(1)内の気圧Pが目標圧力SPに到達したときに、試験室(1)からの排気量と給気量とが一致している場合、圧力制御部(44)は、補助給気制御弁(24)及び補助排気制御弁(34)の開度を変更せずに維持する。     When the air pressure P in the test chamber (1) reaches the target pressure SP and the exhaust amount from the test chamber (1) matches the supply air amount, the pressure control unit (44) The opening degree of the auxiliary air supply control valve (24) and the auxiliary exhaust control valve (34) is maintained without being changed.

一方、試験室(1)内の気圧Pが目標圧力SPに到達したときに、試験室(1)からの排気量がなお給気量を上回っている場合、試験室(1)内の気圧Pは低下し続け、目標圧力SPよりも低くなる。このように試験室(1)内の気圧Pが目標圧力SPに到達してもなお低下し続ける場合、圧力制御部(44)は、補助排気制御弁(34)の開度をさらに低減し、補助給気制御弁(24)の開度をさらに増大する。この制御により、試験室(1)からの排気量が僅かに減り、給気量が僅かに増える。圧力制御部(44)は、試験室(1)への給気量が排気量を上回って試験室(1)内の気圧Pが上昇するまで、補助排気制御弁(34)の開度を低減し、補助給気制御弁(24)の開度を増大する制御を行う。     On the other hand, when the air pressure P in the test chamber (1) reaches the target pressure SP and the exhaust amount from the test chamber (1) still exceeds the air supply amount, the air pressure P in the test chamber (1) Continues to decrease and becomes lower than the target pressure SP. Thus, when the pressure P in the test chamber (1) continues to decrease even when it reaches the target pressure SP, the pressure control unit (44) further reduces the opening of the auxiliary exhaust control valve (34), The opening degree of the auxiliary air supply control valve (24) is further increased. By this control, the exhaust amount from the test chamber (1) is slightly reduced, and the air supply amount is slightly increased. The pressure control unit (44) reduces the opening of the auxiliary exhaust control valve (34) until the air supply to the test chamber (1) exceeds the displacement and the pressure P in the test chamber (1) increases. Then, control is performed to increase the opening of the auxiliary air supply control valve (24).

そして、試験室(1)への給気量が排気量を上回ると、試験室(1)内の気圧Pが上昇し始める。例えば、補助排気制御弁(34)の開度が全閉となる試験室(1)内の気圧PがP11からP12の間で試験室(1)内の気圧Pが上昇し始めた場合、圧力制御部(44)は、補助排気制御弁(34)の開度を全閉に維持し、補助給気制御弁(24)の開度を低減する。これにより、試験室(1)への給気量が僅かに減るため、試験室(1)内の気圧Pの上昇速度が緩やかになる。     Then, when the amount of air supplied to the test chamber (1) exceeds the displacement, the pressure P in the test chamber (1) starts to rise. For example, when the pressure P in the test chamber (1) starts to increase between the pressure P11 and P12 in the test chamber (1) where the opening of the auxiliary exhaust control valve (34) is fully closed, the pressure The control unit (44) maintains the opening of the auxiliary exhaust control valve (34) in a fully closed state, and reduces the opening of the auxiliary air supply control valve (24). As a result, the amount of air supplied to the test chamber (1) is slightly reduced, and the rate of increase of the atmospheric pressure P in the test chamber (1) is moderated.

その後、試験室(1)内の気圧PがP12まで上昇すると、圧力制御部(44)は、補助給気制御弁(24)の開度を低減しつつ、補助排気制御弁(34)の開度を増大していく。これにより、試験室(1)への給気量が僅かに減りつつ、排気量が僅かに増えるため、試験室(1)内の気圧Pの上昇速度がさらに緩やかになる。     Thereafter, when the atmospheric pressure P in the test chamber (1) rises to P12, the pressure control unit (44) opens the auxiliary exhaust control valve (34) while reducing the opening of the auxiliary air supply control valve (24). Increase the degree. As a result, the amount of air supplied to the test chamber (1) is slightly reduced and the amount of exhaust gas is slightly increased, so that the rate of increase of the atmospheric pressure P in the test chamber (1) is further moderated.

このように、圧力制御部(44)は、試験室(1)への給気量が排気量を上回る状態で、試験室(1)内の気圧Pの上昇に伴って、給気量を僅かに減らし、排気量を僅かに増やして給気量と排気量のバランスを変更しながら、試験室(1)内の気圧Pを目標圧力SPに近づけていく。     In this way, the pressure control unit (44) slightly reduces the air supply amount as the air pressure P in the test chamber (1) increases while the air supply amount to the test chamber (1) exceeds the exhaust amount. The air pressure P in the test chamber (1) is brought closer to the target pressure SP while changing the balance between the air supply amount and the exhaust amount by slightly increasing the exhaust amount.

そして、試験室(1)内の気圧Pが目標圧力SPに到達したときに、試験室(1)からの排気量と給気量とが一致している場合、圧力制御部(44)は、補助給気制御弁(24)及び補助排気制御弁(34)の開度を変更せずに維持する。     When the air pressure P in the test chamber (1) reaches the target pressure SP and the exhaust amount from the test chamber (1) matches the supply air amount, the pressure control unit (44) The opening degree of the auxiliary air supply control valve (24) and the auxiliary exhaust control valve (34) is maintained without being changed.

一方、試験室(1)内の気圧Pが目標圧力SPに到達したときに、試験室(1)への給気量が排気量を上回っている場合、試験室(1)内の気圧Pは上昇し続け、再び目標圧力SPよりも高くなる。このように試験室(1)内の気圧Pが目標圧力SPに到達してもなお上昇し続ける場合、圧力制御部(44)は、補助給気制御弁(24)の開度をさらに低減し、補助排気制御弁(34)の開度をさらに増大する。この制御により、試験室(1)への給気量が僅かに減り、排気量が僅かに増える。圧力制御部(44)は、試験室(1)からの排気量が給気量を上回って試験室(1)内の気圧Pが低下するまで、補助給気制御弁(24)の開度を低減し、補助排気制御弁(34)の開度を増大する制御を行う。     On the other hand, when the air pressure P in the test chamber (1) reaches the target pressure SP and the air supply amount to the test chamber (1) exceeds the displacement, the air pressure P in the test chamber (1) is It continues to rise and becomes higher than the target pressure SP again. As described above, when the atmospheric pressure P in the test chamber (1) continues to rise even after reaching the target pressure SP, the pressure control unit (44) further reduces the opening of the auxiliary air supply control valve (24). The opening degree of the auxiliary exhaust control valve (34) is further increased. With this control, the amount of air supplied to the test chamber (1) is slightly reduced and the amount of exhaust is slightly increased. The pressure control unit (44) adjusts the opening of the auxiliary air supply control valve (24) until the exhaust amount from the test chamber (1) exceeds the air supply amount and the pressure P in the test chamber (1) decreases. Control is performed to reduce and increase the opening of the auxiliary exhaust control valve (34).

そして、試験室(1)からの排気量が給気量を上回ると、試験室(1)内の気圧Pが低下し始める。例えば、補助給気制御弁(24)の開度が全閉となる試験室(1)内の気圧PがP13からP14の間で試験室(1)内の気圧Pが低下し始めた場合、圧力制御部(44)は、補助給気制御弁(24)の開度を全閉に維持し、補助排気制御弁(34)の開度を低減する。これにより、試験室(1)からの排気量が僅かに減るため、試験室(1)内の気圧Pの低下速度が緩やかになる。     Then, when the exhaust amount from the test chamber (1) exceeds the air supply amount, the atmospheric pressure P in the test chamber (1) starts to decrease. For example, when the atmospheric pressure P in the test chamber (1) where the opening degree of the auxiliary air supply control valve (24) is fully closed is between P13 and P14 and the atmospheric pressure P in the test chamber (1) starts to decrease, The pressure control unit (44) maintains the opening of the auxiliary air supply control valve (24) in a fully closed state, and reduces the opening of the auxiliary exhaust control valve (34). As a result, the amount of exhaust from the test chamber (1) is slightly reduced, and the rate of decrease in the pressure P in the test chamber (1) is moderated.

なお、この後の制御動作は、上述した試験室(1)内の気圧Pが初めてP13まで低下した後の動作を繰り返す。このような動作の繰り返しにより、試験室(1)内の気圧Pは目標圧力SPを挟んで上下動を繰り返すが、その上下動の振幅がだんだん小さくなる。やがて、試験室(1)内の気圧Pが目標圧力SPに到達したときに、試験室(1)への給気量と排気量とがバランスして試験室(1)内の気圧Pが目標圧力SPに維持されると、圧力制御部(44)は、補助給気制御弁(24)及び補助排気制御弁(34)の開度を変更せずに維持する。     In addition, the control operation after this repeats the operation | movement after the atmospheric pressure P in the test chamber (1) mentioned above fell to P13 for the first time. By repeating such an operation, the atmospheric pressure P in the test chamber (1) repeatedly moves up and down across the target pressure SP, but the amplitude of the vertical movement gradually decreases. Eventually, when the air pressure P in the test chamber (1) reaches the target pressure SP, the air supply amount to the test chamber (1) and the exhaust air amount are balanced, and the air pressure P in the test chamber (1) becomes the target. When the pressure SP is maintained, the pressure control unit (44) maintains the openings of the auxiliary air supply control valve (24) and the auxiliary exhaust control valve (34) without changing them.

以上のような圧力制御部(44)による排気制御弁(33)と補助給気制御弁(24)と補助排気制御弁(34)の開度制御により、試験室(1)内の気圧Pが目標圧力SPに調節されることとなる。     By controlling the opening of the exhaust control valve (33), the auxiliary air supply control valve (24), and the auxiliary exhaust control valve (34) by the pressure control unit (44) as described above, the atmospheric pressure P in the test chamber (1) is changed. The target pressure SP is adjusted.

−実施形態1の効果−
本実施形態1によれば、給気通路(21)及び排気通路(31)の少なくとも一方の試験室(1)に繋がる一部分を二つに分岐した分岐部で構成し、分岐部の一方側の第1分岐管(21c,31c)に大容量の給気制御弁(23)又は排気制御弁(33)を設け、他方側の第2分岐管(21d,31d)に給気制御弁(23)及び排気制御弁(33)よりも口径の小さい小容量の補助制御弁(補助給気制御弁(24)、補助排気制御弁(34))を設けることとした。つまり、給気通路(21)及び排気通路(31)の少なくとも一方が、互いに並列に接続された大容量の制御弁(23,33)と小容量の補助制御弁(24,34)とを有するように構成した。このような構成により、上記圧力制御装置(10)では、試験室(1)内の気圧Pを調整する際に、試験室(1)への給気量と排気量の少なくとも一方を大容量の制御弁(23,33)と小容量の補助制御弁(24,34)の2種類の制御弁で調節することができる。そのため、本圧力制御装置(10)によれば、大容量の制御弁(23,33)のみによって給気量及び排気量を調節して気圧を目標圧力に制御する従来の圧力制御装置に比べて、試験室(1)内の気圧Pを精度良く目標圧力SPに近づけることができる。つまり、大容量の制御弁(23,33)のみでは、試験室(1)内の気圧Pが目標圧力付近に到達したものの、それ以上開度を変更すると、目標圧力SPを大きく超えてしまう(オーバーシュートする)ところ、小容量の補助制御弁(24,34)の開度を変更することにより、試験室(1)内の気圧Pを目標圧力に精度良く近づけることができる。
-Effect of Embodiment 1-
According to the first embodiment, a part connected to at least one of the test chamber (1) of the air supply passage (21) and the exhaust passage (31) is constituted by a bifurcated branch portion, and one side of the branch portion is arranged. A large-capacity air supply control valve (23) or an exhaust control valve (33) is provided in the first branch pipe (21c, 31c), and an air supply control valve (23) is provided in the other second branch pipe (21d, 31d). In addition, a small-capacity auxiliary control valve (auxiliary air supply control valve (24), auxiliary exhaust control valve (34)) having a smaller diameter than the exhaust control valve (33) is provided. That is, at least one of the supply passage (21) and the exhaust passage (31) has a large capacity control valve (23, 33) and a small capacity auxiliary control valve (24, 34) connected in parallel to each other. It was configured as follows. With such a configuration, in the pressure control device (10), when adjusting the pressure P in the test chamber (1), at least one of the supply amount and the exhaust amount to the test chamber (1) has a large capacity. The control valve (23, 33) and a small-capacity auxiliary control valve (24, 34) can be used for adjustment. Therefore, according to this pressure control device (10), compared with the conventional pressure control device that controls the air pressure to the target pressure by adjusting the supply air amount and the exhaust air amount only by the large-capacity control valve (23, 33). The atmospheric pressure P in the test chamber (1) can be brought close to the target pressure SP with high accuracy. That is, with only the large-capacity control valve (23, 33), the atmospheric pressure P in the test chamber (1) has reached near the target pressure, but if the opening is further changed, the target pressure SP will be greatly exceeded ( However, the atmospheric pressure P in the test chamber (1) can be brought close to the target pressure with high accuracy by changing the opening degree of the small-capacity auxiliary control valve (24, 34).

また、本実施形態1によれば、給気通路(21)及び排気通路(31)の両方が、互いに並列に接続された大容量の制御弁(23,33)と小容量の補助制御弁(24,34)とを有するように構成した。そのため、試験室(1)への給気量と排気量の両方を、大容量の制御弁(23,33)と小容量の補助制御弁(24,34)の2種類の制御弁で調節することができる。これにより、大容量の制御弁(23,33)のみによって給気量及び排気量を調節して気圧を目標圧力に制御する従来の圧力制御装置に比べて、試験室(1)内の気圧Pを精度良く目標圧力に近づけることができる。また、補助制御弁(24,34)を給気通路(21)と排気通路(31)の両方に設けることとしたため、試験室(1)内の気圧Pを迅速に目標圧力SPに近づけることができる。     In addition, according to the first embodiment, both the supply passage (21) and the exhaust passage (31) are connected to each other in parallel with a large capacity control valve (23, 33) and a small capacity auxiliary control valve ( 24, 34). Therefore, both the amount of air supplied to the test chamber (1) and the amount of exhaust are adjusted with two types of control valves: a large capacity control valve (23,33) and a small capacity auxiliary control valve (24,34). be able to. As a result, the air pressure P in the test chamber (1) can be compared with the conventional pressure control device that controls the air pressure to the target pressure by adjusting the supply air amount and the exhaust air amount only by the large-capacity control valve (23, 33). Can be brought close to the target pressure with high accuracy. In addition, since the auxiliary control valve (24, 34) is provided in both the air supply passage (21) and the exhaust passage (31), the air pressure P in the test chamber (1) can be brought close to the target pressure SP quickly. it can.

さらに、本実施形態1によれば、給気通路(21)と排気通路(31)のそれぞれに設けた2つの大容量の制御弁(23,33)のうち、一方の給気制御弁(23)を、試験室(1)内への給気量を一定流量に制御する風量制御に用い、他方の排気制御弁(33)と小容量の2つの補助制御弁(24,34)とを、試験室(1)内の気圧Pを目標圧力に制御する圧力制御に用いることとした。このように、給気通路(21)と排気通路(31)のそれぞれに設けた2つの大容量の制御弁(23,33)のうち、一方の給気制御弁(23)で試験室(1)内への給気量を一定流量に制御することにより、試験室(1)における換気風量として所定流量分(給気量分)を容易に確保することができる。また、上記2つの大容量の制御弁(23,33)のうちの他方の排気制御弁(33)と2つの小容量の補助制御弁(24,34)とで試験室(1)内の気圧Pを目標圧力に制御することにより、大容量の制御弁(23,33)のみによって給気量及び排気量を調節して気圧を目標圧力に制御する従来の圧力制御装置に比べて、試験室(1)内の気圧Pを精度良く目標圧力に近づけることができる。また、給気通路(21)と排気通路(31)のそれぞれに設けた2つの小容量の補助制御弁(24,34)を用いることにより、試験室(1)内の気圧Pを迅速に目標圧力に近づけることができる。     Further, according to the first embodiment, one of the two large-capacity control valves (23, 33) provided in each of the air supply passage (21) and the exhaust passage (31) (23 ) Is used for air flow control to control the amount of air supplied into the test chamber (1) to a constant flow rate, and the other exhaust control valve (33) and two small capacity auxiliary control valves (24, 34) The air pressure P in the test chamber (1) was used for pressure control to control the target pressure. Thus, one of the two large-capacity control valves (23, 33) provided in each of the air supply passage (21) and the exhaust passage (31) is connected to the test chamber (1 ) By controlling the air supply amount into the constant flow rate, a predetermined flow rate (air supply amount) can be easily secured as the ventilation air flow rate in the test chamber (1). The other exhaust control valve (33) of the two large-capacity control valves (23, 33) and the two small-capacity auxiliary control valves (24, 34) are used for the atmospheric pressure in the test chamber (1). By controlling P to the target pressure, the test chamber can be compared to a conventional pressure control device that controls the air pressure to the target pressure by adjusting the supply air amount and the exhaust air amount only with a large-capacity control valve (23, 33). The pressure P in (1) can be brought close to the target pressure with high accuracy. In addition, by using two small capacity auxiliary control valves (24, 34) provided in each of the air supply passage (21) and the exhaust passage (31), the air pressure P in the test chamber (1) can be quickly targeted. Can approach pressure.

《その他の実施形態》
上記実施形態については、以下のような構成としてもよい。
<< Other Embodiments >>
About the said embodiment, it is good also as the following structures.

上記実施形態1では、給気通路(21)及び排気通路(31)の両方に分岐部を設け、給気通路(21)及び排気通路(31)の両方に大容量の制御弁(給気制御弁(23)、排気制御弁(33))と小容量の補助制御弁(補助給気制御弁(24)、補助排気制御弁(34))とを設けていたが、本発明に係る圧力制御装置は、給気通路(21)及び排気通路(31)の少なくとも一方に分岐部を設け、大容量の制御弁と小容量の補助制御弁とを設けるものであってもよい。このような圧力制御装置によっても、従来の大容量の制御弁のみで圧力制御を行うものに比べて制御精度を向上させることができる。     In the first embodiment, branch portions are provided in both the air supply passage (21) and the exhaust passage (31), and a large capacity control valve (air supply control) is provided in both the air supply passage (21) and the exhaust passage (31). Although the valve (23), the exhaust control valve (33)) and the small-capacity auxiliary control valve (the auxiliary air supply control valve (24), the auxiliary exhaust control valve (34)) are provided, the pressure control according to the present invention The apparatus may be provided with a branch portion in at least one of the air supply passage (21) and the exhaust passage (31), and a large-capacity control valve and a small-capacity auxiliary control valve. Such a pressure control device can also improve the control accuracy compared to a conventional pressure control using only a large-capacity control valve.

また、上記実施形態1では、制御部(40)は、風量制御部(43)が、試験室(1)への給気量が試験室(1)の必要換気量に応じて予め決定された一定の風量となるように、給気制御弁(23)の開度を制御し、圧力制御部(44)が、試験室(1)内の気圧Pが所定の目標圧力SPとなるように、排気制御弁(33)と補助給気制御弁(24)と補助排気制御弁(34)の開度を制御するように構成されていた。しかしながら、制御部(40)の構成は上述のものに限られない。例えば、制御部(40)は、風量制御部(43)が、試験室(1)からの排気量が試験室(1)の必要換気量に応じて予め決定された一定の風量となるように、排気制御弁(33)の開度を制御し、圧力制御部(44)が、試験室(1)内の気圧Pが所定の目標圧力SPとなるように、給気制御弁(23)と補助給気制御弁(24)と補助排気制御弁(34)の開度を制御するように構成されていてもよい。     Further, in the first embodiment, the control unit (40) is configured such that the air volume control unit (43) determines the amount of air supplied to the test chamber (1) in accordance with the required ventilation amount of the test chamber (1). The opening of the air supply control valve (23) is controlled so that the air flow is constant, and the pressure control unit (44) is configured so that the air pressure P in the test chamber (1) becomes a predetermined target pressure SP. The opening degree of the exhaust control valve (33), the auxiliary air supply control valve (24), and the auxiliary exhaust control valve (34) was controlled. However, the configuration of the control unit (40) is not limited to that described above. For example, the control unit (40) allows the air volume control unit (43) to ensure that the exhaust volume from the test room (1) is a predetermined air volume determined in advance according to the required ventilation volume of the test room (1). The opening degree of the exhaust control valve (33) is controlled, and the pressure control unit (44) is connected to the air supply control valve (23) so that the atmospheric pressure P in the test chamber (1) becomes a predetermined target pressure SP. You may be comprised so that the opening degree of an auxiliary | assistant air supply control valve (24) and an auxiliary | assistant exhaust control valve (34) may be controlled.

以上説明したように、本発明は、気圧調整試験室の圧力制御装置について有用である。     As described above, the present invention is useful for the pressure control device of the atmospheric pressure adjustment test chamber.

1 試験室
10 圧力制御装置
21 給気通路
21c 第1分岐管(分岐部、一方側)
21d 第2分岐管(分岐部、他方側)
23 給気制御弁
24 補助給気制御弁(補助制御弁、補助給気制御弁)
31 排気通路
31c 第1分岐管(分岐部、一方側)
31d 第2分岐管(分岐部、他方側)
33 排気制御弁
34 補助排気制御弁(補助制御弁、補助排気制御弁)
43 風量制御部
44 圧力制御部
1 Test room
10 Pressure control device
21 Air supply passage
21c 1st branch pipe (branch part, one side)
21d Second branch pipe (branch part, other side)
23 Air supply control valve
24 Auxiliary air supply control valve (auxiliary control valve, auxiliary air supply control valve)
31 Exhaust passage
31c 1st branch pipe (branch part, one side)
31d Second branch pipe (branch part, other side)
33 Exhaust control valve
34 Auxiliary exhaust control valve (auxiliary control valve, auxiliary exhaust control valve)
43 Air volume control unit
44 Pressure controller

Claims (3)

外部の空気を試験室(1)に供給する給気通路(21)と、該試験室(1)の空気を外部へ排出する排気通路(31)と、上記給気通路(21)に設けられた給気制御弁(23)と、上記排気通路(31)に設けられた排気制御弁(33)とを備え、上記試験室(1)に対する給気量と排気量とを調節して上記試験室(1)内の気圧Pを目標圧力に制御する気圧調整試験室の圧力制御装置であって、
上記給気通路(21)及び上記排気通路(31)の少なくとも一方は、上記試験室(1)に繋がる一部分が二つに分岐した分岐部に構成され、該分岐部の一方側(21c,31c)に上記給気制御弁(23)又は上記排気制御弁(33)が設けられ、他方側(21d,31d)に上記給気制御弁(23)及び上記排気制御弁(33)よりも口径が小さい補助制御弁(24,34)が設けられている
ことを特徴とする気圧調整試験室の圧力制御装置。
An air supply passage (21) for supplying external air to the test chamber (1), an exhaust passage (31) for discharging the air from the test chamber (1) to the outside, and the air supply passage (21) are provided. The air supply control valve (23) and the exhaust control valve (33) provided in the exhaust passage (31) are adjusted, and the test is performed by adjusting the air supply amount and the exhaust amount to the test chamber (1). A pressure control device for an atmospheric pressure adjustment test chamber for controlling the atmospheric pressure P in the chamber (1) to a target pressure,
At least one of the air supply passage (21) and the exhaust passage (31) is configured as a branch portion in which a part connected to the test chamber (1) branches into two, and one side (21c, 31c of the branch portion) ) Is provided with the air supply control valve (23) or the exhaust control valve (33), and the other side (21d, 31d) has a caliber than the air supply control valve (23) and the exhaust control valve (33). A pressure control device for an atmospheric pressure adjustment test chamber, characterized in that a small auxiliary control valve (24, 34) is provided.
請求項1において、
上記給気通路(21)及び上記排気通路(31)の両方において、上記試験室(1)に繋がる一部分が上記分岐部に構成され、
上記給気通路(21)では、上記分岐部の一方側(21c)に上記給気制御弁(23)が設けられ、他方側(21d)に上記補助制御弁(24,34)である補助給気制御弁(24)が設けられ、
上記排気通路(31)では、上記分岐部の一方側(31c)に上記排気制御弁(33)が設けられ、他方側(31d)に上記補助制御弁(24,34)である補助排気制御弁(34)が設けられている
ことを特徴とする気圧調整試験室の圧力制御装置。
In claim 1,
In both the air supply passage (21) and the exhaust passage (31), a part connected to the test chamber (1) is configured in the branch portion,
In the air supply passage (21), the air supply control valve (23) is provided on one side (21c) of the branch portion, and the auxiliary control valve (24, 34) is provided on the other side (21d). An air control valve (24) is provided,
In the exhaust passage (31), the exhaust control valve (33) is provided on one side (31c) of the branch part, and the auxiliary exhaust control valve is the auxiliary control valve (24, 34) on the other side (31d). (34) A pressure control device for an atmospheric pressure adjustment test chamber.
請求項2において、
上記試験室(1)内への給気量が所定流量となるように、上記給気制御弁(23)の開度を調節する風量制御部(43)と、
上記試験室(1)内の気圧Pが上記目標圧力となるように、上記排気制御弁(33)と上記補助給気制御弁(24)と上記補助排気制御弁(34)との開度を調節する圧力制御部(44)とを備えている
ことを特徴とする気圧調整試験室の圧力制御装置。
In claim 2,
An air volume control unit (43) for adjusting the opening of the air supply control valve (23) so that the air supply amount into the test chamber (1) becomes a predetermined flow rate;
The openings of the exhaust control valve (33), the auxiliary air supply control valve (24), and the auxiliary exhaust control valve (34) are adjusted so that the atmospheric pressure P in the test chamber (1) becomes the target pressure. A pressure control device for an atmospheric pressure adjustment test chamber, comprising a pressure control unit (44) for adjustment.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118310727A (en) * 2024-04-08 2024-07-09 郑州宇晟汽车产品科技开发有限公司 Heater inspection test system with high-low vapor pressure environment simulation

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0332993Y2 (en) * 1986-07-03 1991-07-12
JPH0989725A (en) * 1995-09-20 1997-04-04 Ishikawajima Harima Heavy Ind Co Ltd Simulated testing equipment for high-altitude environment
JP4057685B2 (en) * 1997-10-28 2008-03-05 三機工業株式会社 Pressure control device for low pressure test chamber

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0332993Y2 (en) * 1986-07-03 1991-07-12
JPH0989725A (en) * 1995-09-20 1997-04-04 Ishikawajima Harima Heavy Ind Co Ltd Simulated testing equipment for high-altitude environment
JP4057685B2 (en) * 1997-10-28 2008-03-05 三機工業株式会社 Pressure control device for low pressure test chamber

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118310727A (en) * 2024-04-08 2024-07-09 郑州宇晟汽车产品科技开发有限公司 Heater inspection test system with high-low vapor pressure environment simulation

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