JPH058408Y2 - - Google Patents
Info
- Publication number
- JPH058408Y2 JPH058408Y2 JP1991589U JP1991589U JPH058408Y2 JP H058408 Y2 JPH058408 Y2 JP H058408Y2 JP 1991589 U JP1991589 U JP 1991589U JP 1991589 U JP1991589 U JP 1991589U JP H058408 Y2 JPH058408 Y2 JP H058408Y2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- evaporator
- humidity
- evaporation
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000001704 evaporation Methods 0.000 claims description 39
- 230000008020 evaporation Effects 0.000 claims description 37
- 238000005057 refrigeration Methods 0.000 claims description 11
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 239000003463 adsorbent Substances 0.000 description 8
- 230000007423 decrease Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 2
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 108010016634 Seed Storage Proteins Proteins 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
Landscapes
- Central Air Conditioning (AREA)
- Other Air-Conditioning Systems (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
本考案は、植物の種子等を長期に渡り保存する
べく低湿の環境をつくるための冷凍式の恒温恒湿
装置の改良に関するものである。[Detailed Description of the Invention] Industrial Application Field The present invention relates to an improvement of a refrigerated constant temperature and humidity device for creating a low humidity environment for long-term preservation of plant seeds, etc.
従来技術
従来の恒温恒湿装置としては、圧縮機、凝縮
器、膨張弁、蒸発器等と循環接続された冷凍サイ
クルの蒸発器で除湿、冷却した空気を電熱ヒータ
等の加熱手段で所定の温度まで加熱し、さらに送
風用フアンにて送風するように構成されたものが
一般に知られている。Conventional technology Conventional constant temperature and humidity equipment uses a heating means such as an electric heater to heat air that has been dehumidified and cooled by an evaporator in a refrigeration cycle that is connected to a compressor, condenser, expansion valve, evaporator, etc., to a predetermined temperature. It is generally known that the device is configured to heat up to 100% and then blow air using a blowing fan.
しかし、かかる装置において低湿度を得ようと
する場合(60%RH以下)は、蒸発器の出口空気
温度は露点温度近くにあるが、さらに減湿するた
めには蒸発圧力を低下させ、露点温度を下げる必
要が生じる。この場合は、蒸発温度が低下する程
冷凍サイクルの冷却能力が下がる。一方で蒸発器
入口空気温度も蒸発温度に比較し高めである。 However, when trying to obtain low humidity in such equipment (below 60% RH), the evaporator outlet air temperature is close to the dew point temperature, but in order to further reduce humidity, the evaporation pressure must be lowered to reach the dew point temperature. It becomes necessary to lower the In this case, the lower the evaporation temperature, the lower the cooling capacity of the refrigeration cycle. On the other hand, the evaporator inlet air temperature is also higher than the evaporation temperature.
その結果蒸発器が過熱状態となつてしまい充分
に減湿することができない。 As a result, the evaporator becomes overheated and cannot sufficiently dehumidify.
そのため低湿を得る為にLiCl等の吸着剤を用い
化学的に空気中の水分を吸収させた後、冷凍サイ
クルの蒸発器及び電熱ヒータを用いて所定の温度
に調整して倉庫内に乾燥空気を供給する方式がと
られている。 Therefore, to achieve low humidity, adsorbents such as LiCl are used to chemically absorb the moisture in the air, and then the dry air is adjusted to a predetermined temperature using a refrigeration cycle evaporator and electric heater to supply dry air into the warehouse. A method of supplying it is adopted.
考案が解決しようとする問題点
しかしながら、かかる従来の吸着剤を用いた装
置の場合は、吸着剤が水分を充分に吸収した後は
水分の吸収能力が落ちる為に、吸着剤を加熱して
水分をパージする必要がある。又パージしている
間は他の吸着剤を使用する必要があり、装置全体
が大きなものになると云つた不都合がある。Problems that the invention aims to solve However, in the case of devices using such conventional adsorbents, the water absorption capacity decreases after the adsorbent has absorbed enough water, so the adsorbent is heated to absorb moisture. need to be purged. Furthermore, it is necessary to use another adsorbent during purging, which inconveniently increases the size of the entire apparatus.
さらに吸着剤の化学反応を用いて水分を吸収す
るように構成されている為に、長期に渡り使用し
ていると吸着剤を収容している機器及びその周辺
の機器等が腐食等により傷むのでライフサイクル
が短いといつた不都合もある。 Furthermore, since it is structured to absorb moisture using the chemical reaction of the adsorbent, if it is used for a long period of time, the equipment containing the adsorbent and surrounding equipment will be damaged due to corrosion etc. There is also the disadvantage of a short life cycle.
そこで本考案は、かかる従来技術の欠点に鑑み
吸着剤を使用することなく冷凍サイクルだけで低
湿の環境を作りあげることが可能な装置を提供す
ることを目的とする。 In view of the drawbacks of the prior art, an object of the present invention is to provide an apparatus capable of creating a low-humidity environment using only a refrigeration cycle without using an adsorbent.
問題点を解決するための手段
すなわち本考案は、圧縮機、凝縮器、膨張弁、
蒸発器及び蒸発圧力調整弁と循環接続された冷凍
サイクルの蒸発器と、送風用ブロワーと、加熱用
のヒータとが吸気ダクト内に設置された装置にお
いて、前記蒸発圧力調整弁が制御装置に設定され
た温度及び湿度に基づき開閉されるように構成さ
れ、送風用ブロワーが蒸発温度が低く設定された
場合に制御装置の指示に従い回転数を下げるよう
に作動するように構成された低湿型恒温恒湿装置
により本目的を達成する。Means for solving the problems That is, the present invention provides a compressor, a condenser, an expansion valve,
In a device in which an evaporator of a refrigeration cycle, a blower for blowing air, and a heater for heating are installed in an intake duct, the evaporator and the evaporation pressure adjustment valve are connected in circulation, and the evaporation pressure adjustment valve is set in the control device. The low-humidity constant-temperature constant-temperature controller is configured to open and close based on the temperature and humidity set, and the blower is configured to operate to lower the rotation speed according to instructions from the control device when the evaporation temperature is set low. A humidification device achieves this objective.
尚本考案の低湿型恒温恒湿装置を作成するに当
り、蒸発器の蒸発温度と蒸発器の出口空気温度と
の温度差が小さくなるように蒸発器の面積を通常
よりも広めにするのが良く、また蒸発器の蒸発温
度を変更するために蒸発圧力調整弁の開度が連続
的に広がつたり、絞つたりできるものを採用する
と良い。 In creating the low-humidity constant temperature and humidity device of the present invention, it is recommended to make the area of the evaporator wider than usual so that the temperature difference between the evaporation temperature of the evaporator and the outlet air temperature of the evaporator is small. It is also good to adopt an evaporation pressure regulating valve that can continuously widen or narrow the opening in order to change the evaporation temperature of the evaporator.
更に、膨張弁も蒸発温度を低下させる場合に冷
媒の供給不足とならぬように開度が調整できるも
のを採用すると良い。 Furthermore, it is preferable to adopt an expansion valve whose opening degree can be adjusted so as not to cause a shortage of refrigerant supply when lowering the evaporation temperature.
作 用
本考案にかかる装置では、制御装置に設定温度
及び湿度を入力する。Function: In the device according to the present invention, set temperature and humidity are input to the control device.
するとその温度及び湿度に基づき制御装置は、
当該露点温度を算出し、冷凍サイクルに対しては
蒸発圧力調整弁の開度を開閉することにより蒸発
温度が設定湿度の露点温度となるように指示す
る。 Then, based on the temperature and humidity, the control device
The dew point temperature is calculated, and the refrigeration cycle is instructed to adjust the opening degree of the evaporation pressure regulating valve so that the evaporation temperature becomes the dew point temperature of the set humidity.
すると送風用ブロワーから送られてきた空気は
蒸発器で除湿され、絶対湿度が下げられる。 The air sent from the blower is then dehumidified by the evaporator, lowering the absolute humidity.
次に蒸発器で除湿冷却された空気は、電熱ヒー
タにより加熱され所定の温度まで上昇させられ
る。その結果相対湿度は所定の湿度になり、倉庫
等の貯蔵室内に送風される。 Next, the air that has been dehumidified and cooled by the evaporator is heated by an electric heater and raised to a predetermined temperature. As a result, the relative humidity becomes a predetermined humidity, and the air is blown into a storage room such as a warehouse.
そして蒸発圧力調整弁が絞られ、蒸発圧力が下
げられた時には冷凍サイクルの冷却能力を越える
おそれがあるので、本考案にかかる装置では蒸発
温度を下げる場合に併せて送風用ブロワーの回転
数を調節して減じるように作用する。 When the evaporation pressure regulating valve is throttled and the evaporation pressure is lowered, there is a risk that the cooling capacity of the refrigeration cycle will be exceeded. Therefore, in the device according to the present invention, the rotation speed of the blower is adjusted in conjunction with lowering the evaporation temperature. It acts to reduce the
実施例
以下に本考案を図面に示された一実施例に従つ
て詳細に説明する。Embodiment Hereinafter, the present invention will be explained in detail according to an embodiment shown in the drawings.
図において1は、図示しない倉庫等の種子貯蔵
室内に低湿恒温空気を導く為の吸気ダクトであ
り、該ダクト内には左から送風用ブロワー2、圧
縮機3、凝縮器4、膨張弁5、蒸発器6、電子蒸
発圧力調整弁7及びアキユムレータ8と循環接続
された冷凍サイクルの蒸発器6及び電熱ヒータ9
と直列に配置されている。 In the figure, 1 is an intake duct for introducing low-humidity constant-temperature air into a seed storage room such as a warehouse (not shown).Inside the duct, from the left are a blower 2, a compressor 3, a condenser 4, an expansion valve 5, The evaporator 6 and electric heater 9 of the refrigeration cycle are connected in circulation to the evaporator 6, the electronic evaporation pressure regulating valve 7, and the accumulator 8.
are placed in series with.
蒸発圧力調整弁7は、駆動回路10の作動によ
りその弁の開度が連続的に調整できるようになつ
ており、また送風用ブロワー2は回転数制御器1
2からの指示によりその回転数が増減できるよう
に構成されている。 The opening degree of the evaporation pressure regulating valve 7 can be continuously adjusted by the operation of a drive circuit 10, and the blower 2 has a rotation speed controller 1.
The number of rotations can be increased or decreased based on instructions from 2.
これらの駆動回路10は、蒸発圧力調整器14
のコントロールを受ける。すなわち蒸発器6の空
気出口付近に設けた温度検出手段15の検出温度
と設定蒸発温度との差温から駆動回路10に蒸発
圧力調整弁7の開度を調整するように指示され
る。 These drive circuits 10 include an evaporation pressure regulator 14
be controlled by. That is, the drive circuit 10 is instructed to adjust the opening degree of the evaporation pressure regulating valve 7 based on the temperature difference between the temperature detected by the temperature detection means 15 provided near the air outlet of the evaporator 6 and the set evaporation temperature.
16は全体の制御装置であり、温度及び湿度の
入力手段例えば温度設定つまみ18及び湿度設定
つまみ19への入力に基づきそれにみあつた蒸発
温度を算出し、それぞれ蒸発圧力調整器14及び
回転数制御器12に指示する。 Reference numeral 16 denotes an overall control device, which calculates the evaporation temperature based on inputs to temperature and humidity input means, such as a temperature setting knob 18 and a humidity setting knob 19, and controls the evaporation pressure regulator 14 and rotation speed control, respectively. instruct the device 12.
17は電熱ヒータ9の空気出口付近に設置され
た温度検出手段であり、該検出手段17の検出結
果に基づき制御装置16は設定温度を維持するよ
うに電熱ヒータ9に電力を供給している。 Reference numeral 17 denotes a temperature detecting means installed near the air outlet of the electric heater 9. Based on the detection result of the detecting means 17, the control device 16 supplies electric power to the electric heater 9 to maintain the set temperature.
具体的には、二連調整つまみ20の温度つまみ
を高から低に動かすと、回転数のつまみも高速か
ら低速に同時に作動するように構成されている。 Specifically, when the temperature knob of the dual adjustment knob 20 is moved from high to low, the rotation speed knob is also simultaneously operated from high to low.
以上述べた構成において本考案にかかる実施例
の装置の作動について具体的に説明する。 The operation of the apparatus according to the embodiment of the present invention in the configuration described above will be specifically explained.
気温10℃、湿度70%RHの状態(第3図Aの状
態)で設定温度を10℃、設定湿度を50%RHとす
る場合は、蒸発器の蒸発温度は略0℃と制御装置
16が算出し、二連つまみ20を作動させて、各
回転数制御器12及び蒸発圧力調整器14に回転
数及び蒸発温度の指示が与えられる。 When the set temperature is 10°C and the set humidity is 50%RH under conditions of air temperature 10°C and humidity 70%RH (conditions shown in Figure 3 A), the evaporation temperature of the evaporator is approximately 0°C and the control device 16 The rotation speed and evaporation temperature are given to each rotation speed controller 12 and evaporation pressure regulator 14 by calculating and operating the double knob 20.
与えられた蒸発温度0℃に基づき駆動回路10
を作動させて蒸発圧力調整弁7の開度を調整す
る。 Based on the given evaporation temperature of 0°C, the drive circuit 10
is operated to adjust the opening degree of the evaporation pressure regulating valve 7.
その結果、冷凍サイクルは蒸発器6を0℃にす
るべく作動する。 As a result, the refrigeration cycle operates to bring the evaporator 6 to 0°C.
その結果送風用ブロワー2から送風された空気
は蒸発器6で冷却且つ除湿される(第3図Bの状
態)が、除湿された後の温度を温度検出手段15
が検出しているので、常時蒸発器6を出た空気の
温度が0℃となるように蒸発圧力調整器14によ
り蒸発圧力調整弁7の開度が調整される。 As a result, the air blown from the blower 2 is cooled and dehumidified by the evaporator 6 (the state shown in FIG. 3B), and the temperature after being dehumidified is measured by the temperature detection means 15.
is detected, the opening degree of the evaporating pressure regulating valve 7 is adjusted by the evaporating pressure regulator 14 so that the temperature of the air exiting the evaporator 6 is always 0°C.
0℃における飽和蒸発圧力が略10℃における飽
和蒸発圧力の半分に該当するので、電熱ヒータ9
にて加熱して10℃の空気にすれば設定した温度か
つ湿度の空気を供給することになる(第3図Cの
状態)。 Since the saturated evaporation pressure at 0°C corresponds to approximately half of the saturated evaporation pressure at 10°C, the electric heater 9
If the air is heated to 10°C, air at the set temperature and humidity will be supplied (state shown in Figure 3C).
尚送風用ブロワー2の回転数は、蒸発設定温度
の低下と共に風量も低下するように構成されてい
るが、蒸発器で奪うべき熱量Qiが
Qi=(V/ν)・δ1[Kcal/h]
V:風量[m3/h],ν:比体積[m3/Kg],
δ1:蒸発器入口出口のエンタルピ差[kcal/
Kg]
であり、Vを小さくすることによりQiも比例し
て小さくなるため、蒸発器は過熱状態にならない
状態で運転することができる。 The rotational speed of the air blower 2 is configured so that the air volume decreases as the evaporation set temperature decreases, but the amount of heat Qi to be removed by the evaporator is Qi = (V/ν)・δ 1 [Kcal/h ] V: Air volume [m 3 /h], ν: Specific volume [m 3 /Kg], δ 1 : Enthalpy difference at evaporator inlet and outlet [kcal/
Kg], and by reducing V, Qi also decreases proportionally, so the evaporator can be operated without overheating.
従つてその調節により第4図に示すように蒸発
器の能力を蒸発温度に正比例させた直線状のもの
にすることができる。 Therefore, the adjustment can make the capacity of the evaporator linear in direct proportion to the evaporation temperature, as shown in FIG.
効 果
以上述べたように本考案にかかる装置は、冷凍
サイクルだけで比較的低湿度の空気を作成するこ
とができると共に装置のライフサイクルを長くす
ることができる。Effects As described above, the device according to the present invention can create relatively low-humidity air using only the refrigeration cycle, and can lengthen the life cycle of the device.
図は本考案にかかる装置の一実施例を示すもの
で、第1図は装置の概略を示す縦断面図、第2図
は本考案と従来の装置の設定可能な温度・湿度域
を示すグラフ、第3図は本考案にかかる装置の除
湿、加熱過程を示す空気線図、第4図は蒸発温度
と蒸発器の能力との関係を示すグラフである。
1……吸気ダクト、2……送風用ブロワー、3
……圧縮機、4……凝縮器、5……膨張弁、6…
…蒸発器、7……蒸発圧力調整弁、8……アキユ
ムレータ、9……電熱ヒータ、10……駆動回
路、12……回転数制御器、14……蒸発圧力制
御器、15……温度検出手段、16……制御装
置、18……温度設定つまみ、19……湿度設定
つまみ、20……二連調整つまみ。
The figures show one embodiment of the device according to the present invention. Fig. 1 is a longitudinal sectional view showing the outline of the device, and Fig. 2 is a graph showing the temperature and humidity range that can be set for the device of the present invention and the conventional device. , FIG. 3 is an psychrometric diagram showing the dehumidification and heating process of the apparatus according to the present invention, and FIG. 4 is a graph showing the relationship between evaporation temperature and evaporator capacity. 1...Intake duct, 2...Air blower, 3
...Compressor, 4...Condenser, 5...Expansion valve, 6...
... Evaporator, 7 ... Evaporation pressure regulating valve, 8 ... Accumulator, 9 ... Electric heater, 10 ... Drive circuit, 12 ... Rotation speed controller, 14 ... Evaporation pressure controller, 15 ... Temperature detection Means, 16...control device, 18...temperature setting knob, 19...humidity setting knob, 20...double adjustment knob.
Claims (1)
調整弁と循環接続された冷凍サイクルの蒸発器
と、送風用ブロワーと、加熱用のヒータとが吸気
ダクト内に設置された装置において、前記蒸発圧
力調整弁が制御装置に設定された温度及び湿度に
基づき開閉されるように構成され、送風用ブロワ
ーが蒸発温度が低く設定された場合に制御装置の
指示に従い回転数を下げるように作動することを
特徴とする低湿型恒温恒湿装置。 In the device in which an evaporator of a refrigeration cycle is cyclically connected to a compressor, a condenser, an expansion valve, an evaporator, and an evaporation pressure regulating valve, a blower for blowing air, and a heater for heating are installed in an intake duct. The evaporation pressure regulating valve is configured to open and close based on the temperature and humidity set in the control device, and the blower operates to lower the rotation speed according to instructions from the control device when the evaporation temperature is set low. A low humidity constant temperature and humidity device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1991589U JPH058408Y2 (en) | 1989-02-22 | 1989-02-22 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1991589U JPH058408Y2 (en) | 1989-02-22 | 1989-02-22 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02114834U JPH02114834U (en) | 1990-09-13 |
JPH058408Y2 true JPH058408Y2 (en) | 1993-03-03 |
Family
ID=31235850
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1991589U Expired - Lifetime JPH058408Y2 (en) | 1989-02-22 | 1989-02-22 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH058408Y2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006292295A (en) * | 2005-04-12 | 2006-10-26 | Tokyo Rika Kikai Kk | Temperature controller for scientific experiment |
JP2009168278A (en) * | 2008-01-11 | 2009-07-30 | Sanyo Electric Co Ltd | Constant temperature and humidity box |
JP5180688B2 (en) * | 2008-06-04 | 2013-04-10 | エスペック株式会社 | Constant temperature and humidity device |
-
1989
- 1989-02-22 JP JP1991589U patent/JPH058408Y2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH02114834U (en) | 1990-09-13 |
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