JP3096673B2 - Cold air dryer - Google Patents
Cold air dryerInfo
- Publication number
- JP3096673B2 JP3096673B2 JP10102581A JP10258198A JP3096673B2 JP 3096673 B2 JP3096673 B2 JP 3096673B2 JP 10102581 A JP10102581 A JP 10102581A JP 10258198 A JP10258198 A JP 10258198A JP 3096673 B2 JP3096673 B2 JP 3096673B2
- Authority
- JP
- Japan
- Prior art keywords
- cooler
- reheater
- temperature
- compressor
- refrigerant
- 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
Landscapes
- Defrosting Systems (AREA)
- Drying Of Solid Materials (AREA)
- Freezing, Cooling And Drying Of Foods (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、食品などの乾燥
に用いる冷風乾燥機に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cool air dryer used for drying foods and the like.
【０００２】[0002]
【従来の技術】冷却器と再熱器とを乾燥庫内に配置した
乾燥機が、食品の乾燥（例えば、干物などを）によく用
いられている。2. Description of the Related Art A dryer in which a cooler and a reheater are arranged in a drying cabinet is often used for drying food (eg, dried fish).
【０００３】この乾燥機は、図５に示すように、冷却器
１と再熱器２とを一列に設け、ファン３で送風すること
によって、冷却器１で庫内の空気を冷却し、再熱器２で
再熱して減湿する。In this dryer, as shown in FIG. 5, a cooler 1 and a reheater 2 are provided in a line, and air is blown by a fan 3, whereby the air in the refrigerator is cooled by the cooler 1 and re-cooled. Reheat in the heater 2 to reduce the humidity.
【０００４】すなわち、庫内の空気を冷却器１で露点温
度以下に冷却して湿気をとり、再熱器２で加熱すること
によって元の温度にして吐出する。[0004] That is, the air in the refrigerator is cooled to a temperature lower than the dew point by the cooler 1 to remove moisture, and is heated to the original temperature by the reheater 2 and discharged.
【０００５】ところで、上記の乾燥機では、除湿により
相対湿度が低下すると除湿能力が低下する。[0005] In the above-mentioned dryer, when the relative humidity decreases due to the dehumidification, the dehumidification ability decreases.
【０００６】例えば、図６に示す空気線図において、吸
い込み空気の温度をａとし、冷却器１通過後の空気の温
度をｂとすると、相対湿度が９０％の場合、ｃの除湿水
量が得られる。ところが、相対湿度が４０％に低下する
と、除湿水量はｄしか得られない。For example, in the psychrometric chart shown in FIG. 6, if the temperature of the intake air is a and the temperature of the air after passing through the cooler 1 is b, when the relative humidity is 90%, the amount of dehumidified water c is obtained. Can be However, when the relative humidity decreases to 40%, only the dehumidification water amount d can be obtained.
【０００７】このように、相対湿度の低下にともない除
湿水量が低下する。そのため、乾燥に時間がかかり、エ
ネルギー効率も悪いという問題がある。[0007] As described above, the amount of dehumidifying water decreases as the relative humidity decreases. Therefore, there is a problem that it takes time for drying and energy efficiency is poor.
【０００８】これを解決する一つの方法として、冷却器
１の温度を下げれば、絶対湿度を低くすることができる
ので、除湿水量を向上できる。As one method of solving this, if the temperature of the cooler 1 is lowered, the absolute humidity can be lowered, and the amount of dehumidified water can be improved.
【０００９】[0009]
【発明が解決しようとする課題】しかしながら、上記の
冷却器の温度を下げるという方法では、圧縮機のパワー
アップやエントロピーの高い冷媒を使用しなければなら
ないので、装置の大型化やコストアップになる問題があ
る。However, in the above-mentioned method of lowering the temperature of the cooler, the power of the compressor must be increased, and a refrigerant having a high entropy must be used. There's a problem.
【００１０】そこで、この発明の課題は、圧縮機のパワ
ーアップやエントロピーの高い冷媒を使用せずに、除湿
水量の低下を克服して乾燥時間を短縮し、かつ、エネル
ギー効率の向上を図れるようにすることである。An object of the present invention is to overcome the decrease in the amount of dehumidifying water, shorten the drying time, and improve the energy efficiency without increasing the power of the compressor or using a refrigerant having a high entropy. It is to be.
【００１１】[0011]
【課題を解決するための手段】上記の課題を解決するた
め、この発明では、乾燥庫内に冷却器と再熱器を配置
し、庫外に凝縮器と圧縮機とを配置し、前記圧縮機に再
熱器と凝縮器とを冷媒の切り換え手段を介して並列に接
続し、その圧縮機に再熱器と凝縮器とを並列に接続した
直列回路をレシーバタンクと膨張弁とを介して上記冷却
器に接続し、上記乾燥庫内の相対湿度が低下すると、切
り換え手段を切り換え、冷媒を圧縮機から再熱器を介し
て冷却器へ供給して冷却器の蒸発温度を低下させ、一
方、冷却器の蒸発温度が低下して冷却器に着霜を生じ、
乾燥庫内の温度が設定温度より高くなると、切り換え手
段を切り換えて冷媒を圧縮機から凝縮器を介して冷却器
へ供給し、冷却器の蒸発温度を上昇させて除霜すること
を繰り返して行うようにした構成を採用したのである。To solve the above object, according to an aspect of, the present invention, a condenser and reheater placed in a drying oven, place the condenser and the compressor to the outside of the refrigerator, the compressor A reheater and a condenser are connected in parallel to each other via a refrigerant switching means, and a series circuit in which the reheater and the condenser are connected in parallel to the compressor is connected via a receiver tank and an expansion valve. When connected to the cooler and the relative humidity in the drying cabinet decreases, the switching means is switched, and the refrigerant is supplied from the compressor to the cooler via the reheater to reduce the evaporating temperature of the cooler. , The evaporating temperature of the cooler drops, causing frost on the cooler,
When the temperature in the drying cabinet becomes higher than the set temperature, the switching means is switched to supply the refrigerant from the compressor to the cooler via the condenser, and the evaporating temperature of the cooler is raised to perform defrosting repeatedly. Thus, the configuration was adopted.
【００１２】このような構成を採用することにより、冷
媒の切り換え手段を切り換えて圧縮機から再熱器に冷媒
を供給し、レシーバタンクと膨張弁とを介して冷却器に
冷媒を供給し、再熱器を凝縮器として作用させる。する
と、再熱器は冷却器の冷風によって冷却され、再熱器の
冷媒の凝縮圧力は低下する。そのため、膨張弁の入口側
（高圧側）と出口側（低圧側）の圧力差は少なくなり、
出口側から噴出する冷媒も減少する。その結果、相対的
に圧縮機による吸引圧力が高くなり、冷却器（低圧）の
圧力を下げるため、蒸発温度が低くなり、冷却器の温度
をより低くすることができる。By adopting such a configuration, the refrigerant switching means is switched to supply the refrigerant from the compressor to the reheater, and to supply the refrigerant to the cooler via the receiver tank and the expansion valve. The heater acts as a condenser. Then, the reheater is cooled by the cool air of the cooler, and the condensation pressure of the refrigerant in the reheater decreases. Therefore, the pressure difference between the inlet side (high pressure side) and the outlet side (low pressure side) of the expansion valve is reduced,
Refrigerant discharged from the outlet side also decreases. As a result, the suction pressure of the compressor becomes relatively high, and the pressure of the cooler (low pressure) is reduced, so that the evaporation temperature is lowered and the temperature of the cooler can be further lowered.
【００１３】次に、切り換え手段を切り換えて圧縮機か
ら凝縮器に冷媒を供給し、冷媒を庫外の凝縮器で冷却す
ると、庫外は冷却器の冷風よりも温度が高いため、上述
の再熱器の場合より凝縮圧力は高くなる。そのため、膨
張弁の入口側（高圧側）と出口側（低圧側）の圧力差は
大きくなって噴出する冷媒は増加する。その結果、相対
的に圧縮機による吸引圧力は低くなり、冷却器の圧力が
上がり蒸発温度が上がるため、冷却器の温度を上昇させ
ることができる。Next, the switching means is switched to supply the refrigerant from the compressor to the condenser, and the refrigerant is cooled by the condenser outside the refrigerator, and the temperature outside the refrigerator is higher than the cool air of the cooler. Therefore, the condensing pressure is higher than in the case of the reheater described above. Therefore, the pressure difference between the inlet side (high-pressure side) and the outlet side (low-pressure side) of the expansion valve increases, and the amount of refrigerant to be jetted increases. As a result, the suction pressure of the compressor becomes relatively low, the pressure of the cooler rises, and the evaporation temperature rises, so that the temperature of the cooler can be raised.
【００１４】すなわち、再熱器を介して冷却器に冷媒を
供給すると、冷却器の蒸発温度をより低く下げることが
できるので、絶対湿度を低くして除湿水量を多く取り出
すことができる。このとき、冷却器に発生する霜は、凝
縮器を働かせれば、冷却器の温度を上昇させることがで
きるので、除去することができる。したがって、この動
作を繰り返すことにより、効率よく乾燥できる。That is, when the refrigerant is supplied to the cooler via the reheater, the evaporation temperature of the cooler can be lowered further, so that the absolute humidity can be reduced and a large amount of dehumidified water can be taken out. At this time, the frost generated in the cooler can be removed because the temperature of the cooler can be increased by operating the condenser. Therefore, drying can be performed efficiently by repeating this operation.
【００１５】また、この発明の請求項２に係る発明で
は、上記冷却器を第１と第２の冷却器とに分割し、分割
した第１と第２の冷却器にそれぞれバルブを設けて上記
直列回路と並列に接続し、上記再熱器が作動した際に、
前記第１と第２の冷却器のいずれか一方のみに冷媒を供
給し、上記再熱器が停止した際に前記第１と第２の冷却
器に冷媒を供給するようにした構成を採用することがで
きる。In the invention according to a second aspect of the present invention, the cooler is divided into a first cooler and a second cooler, and the divided first and second coolers are provided with valves, respectively. When connected in parallel with the series circuit and the reheater operates,
A configuration is adopted in which the refrigerant is supplied to only one of the first and second coolers and the refrigerant is supplied to the first and second coolers when the reheater is stopped. be able to.
【００１６】このような構成を採用することにより、圧
縮機からの冷媒を分割した冷却器の一方に供給すること
で、その一方の冷却器の蒸発温度を両方に供給した場合
よりも下げることができる。By employing such a configuration, the pressure
By supplying the refrigerant from the compressor to one of the divided coolers, it is possible to lower the evaporation temperature of one of the coolers as compared with the case where the refrigerant is supplied to both.
【００１７】このため、再熱器がオンのとき、いずれか
一方の冷却器に冷媒を供給し、この冷却器の蒸発温度を
下げて除湿を行う。このとき、一方の冷却器に霜が付く
が、再熱器をオフとして両方の冷却器に冷媒を供給する
と冷却器の蒸発温度を上昇させることができるので霜を
取ることができる。For this reason, when the reheater is on, the refrigerant is supplied to one of the coolers, and the evaporation temperature of the cooler is lowered to perform the dehumidification. At this time, frost is formed on one of the coolers. However, if the reheater is turned off and the refrigerant is supplied to both of the coolers, the evaporation temperature of the coolers can be increased, so that the frost can be removed.
【００１８】[0018]
【発明の実施の形態】以下、この発明の実施の形態を図
面に基づいて説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１９】図１及び図２に第１実施形態の冷風乾燥機
を示す。FIGS. 1 and 2 show a cool air dryer according to a first embodiment.
【００２０】この乾燥機は、乾燥室１０と機械室１１と
からなり、下段に設けられた機械室１１には、圧縮機１
２と凝縮器１３及びレシーバタンク１４が設けられてい
る。一方、上段に設けられた乾燥室１０は、ガラス扉に
よって開閉自在になっており、庫内には、冷却器１、再
熱器２、補助ヒータ１５及びファン３が設けられてい
る。This dryer comprises a drying room 10 and a machine room 11, and the machine room 11 provided in the lower stage has a compressor 1
2, a condenser 13 and a receiver tank 14 are provided. On the other hand, the drying chamber 10 provided in the upper stage is openable and closable by a glass door, and a cooler 1, a reheater 2, an auxiliary heater 15 and a fan 3 are provided in the refrigerator.
【００２１】庫内の冷却器１と再熱器２及び補助ヒータ
１５は、図２に示すように、一列に設けられ、再熱器２
側に設けたファン３によって冷却器１に矢印の向きの負
圧がかかるようになっている。As shown in FIG. 2, the cooler 1, the reheater 2 and the auxiliary heater 15 in the refrigerator are provided in a row, and the reheater 2
A negative pressure in the direction of the arrow is applied to the cooler 1 by a fan 3 provided on the side.
【００２２】また、この再熱器２と凝縮器１３の容量
は、再熱器２ ＞ 凝縮器１３となるよう設定されてお
り、冷却器１と再熱器２とで、図２に示すような、乾燥
用の除湿回路を構成する。The capacities of the reheater 2 and the condenser 13 are set so that the reheater 2> the condenser 13 is satisfied . A dehumidification circuit for drying is constituted.
【００２３】すなわち、凝縮器１３は、冷媒の切り換え
手段である凝縮器用ソレノイドバルブ１６と逆止弁１７
を介して圧縮機１２と接続され、この圧縮機１２と接続
された凝縮器１３は、レシーバタンク１４に接続されて
いる。[0023] That is, the condenser 13, a condenser solenoid valve 16 is a switching means of the refrigerant non-return valve 17
It is connected to the compressor 12 via a condenser 13 connected with the compressor 12 is connected to the receiver tank 14.
【００２４】一方、再熱器２は、冷媒の切り換え手段で
ある再熱器用ソレノイドバルブ１８を介して圧縮機１２
と接続されており、圧縮機１２と接続されたこの再熱器
２は、逆止弁１７を介してレシーバタンク１４と接続さ
れている。On the other hand, the reheater 2 is connected to the compressor 12 via a reheater solenoid valve 18 which is a means for switching the refrigerant.
The reheater 2 connected to the compressor 12 is connected to the receiver tank 14 via the check valve 17.
【００２５】このように、圧縮機１２に並列に接続され
た再熱器２と凝縮器１３は、ドライコア１９及び膨張弁
２０を介して冷却器１と接続されている。As described above, the reheater 2 and the condenser 13 connected in parallel to the compressor 12 are connected to the cooler 1 via the dry core 19 and the expansion valve 20.
【００２６】乾燥室１０には、温度コントローラ（サー
モスタット）２１を設けて、乾燥室内の温度を検出でき
るようになっている。また、温度コントローラ２１はＡ
接点とＢ接点を有するもので、凝縮器用ソレノイドバル
ブ１６と再熱器用ソレノイドバルブ１８と接続され、両
者１６，１８を後述のように制御するようになってい
る。A temperature controller (thermostat) 21 is provided in the drying chamber 10 so that the temperature in the drying chamber can be detected. Further, the temperature controller 21
Those having a contact and B contact is connected to the condenser solenoid valve 16 and the reheat dexterity solenoid valve 18, which is both 16 and 18 to control as described below.
【００２７】この形態は、上記のように構成されてお
り、まず、乾燥室内温度が設定温度より低くいと、すな
わち、相対湿度が低下すると、温度コントローラ２１は
凝縮器用ソレノイドバルブ１６をオフとし、再熱器用ソ
レノイドバルブ１８をオンとして除湿を行う。This embodiment is configured as described above. First, when the drying room temperature is lower than the set temperature, that is, when the relative humidity decreases, the temperature controller 21
And turning off the condenser solenoid valve 16 performs dehumidifying reheat dexterity solenoid valve 18 as an on.
【００２８】すなわち、圧縮機１２によって圧縮吐出さ
れた高温高圧の冷媒ガスは再熱器２に供給され、冷却器
１の冷風によって冷却される。また、冷却された冷媒
は、レシーバタンク１４で液化され、膨張弁２０で減圧
されて冷却器１に供給される。[0028] That is, refrigerant gas of high temperature and high pressure compressed discharge by the compressor 12 is supplied to the reheater 2, is cooled by cool air of the cooler 1. The cooled refrigerant is liquefied in the receiver tank 14, decompressed by the expansion valve 20, and supplied to the cooler 1.
【００２９】このとき、再熱器２は、冷却器１により冷
却された低い温度（約５度）の冷風により冷却されるた
め、再熱器２における凝縮圧力は、例えば１０ｋｇ／ｃ
ｍ2〜１１ｋｇ／ｃｍ2 に低下する。このため、膨張弁
２０の入口側（高圧側）と出口側（低圧側）の圧力差は
減少し、出口側から噴出する冷媒が少なくなる。その結
果、相対的に圧縮機１２による吸引圧力は高くなり、冷
却器（低圧）１の圧力が低くなって冷却器１の蒸発温度
を、−１４〜−１８度のより低い温度まで低下させるこ
とができる。At this time, since the reheater 2 is cooled by the low temperature (about 5 ° C.) cold air cooled by the cooler 1, the condensing pressure in the reheater 2 is, for example, 10 kg / c.
m 2 -11 kg / cm 2 . Therefore, the pressure difference between the inlet side (high pressure side) and the outlet side (low pressure side) of the expansion valve 20 decreases, and the amount of refrigerant ejected from the outlet side decreases. As a result, the suction pressure by the compressor 12 becomes relatively high, and the pressure of the cooler (low pressure) 1 becomes lower, thereby lowering the evaporation temperature of the cooler 1 to a lower temperature of -14 to -18 degrees. Can be.
【００３０】この際、冷却器１に着霜を生じるが、再熱
器２によって乾燥室１０の庫内温度が設定温度以上に上
昇すると、温度コントローラ２１は、逆に、凝縮器用ソ
レノイドバルブ１６をオンとし、再熱器用ソレノイドバ
ルブ１８をオフとする。[0030] At this time, although causing frost to the cooler 1, the inside temperature of the drying chamber 10 by a reheater 2 rises above the set temperature, the temperature controller 21, on the contrary, condenser solenoid valve 16 Is turned on, and the solenoid valve 18 for the reheater is turned off.
【００３１】すなわち、圧縮機１２によって圧縮吐出さ
れた高温高圧の冷媒ガスは、凝縮器１３で冷却され、レ
シーバタンク１４と膨張弁２０とを介して、冷却器１に
供給される。[0031] That is, refrigerant gas of high temperature and high pressure compressed discharge by the compressor 12 is cooled in the condenser 13, through the receiver tank 14 and expansion valve 20, is supplied to the cooler 1.
【００３２】このとき、冷媒は冷却器１の冷風よりも温
度の高い庫外の凝縮器１３により冷却されるため、凝縮
圧力は上述の再熱器２の場合より高い、１５ｋｇ／ｃｍ
2 〜１７ｋｇ／ｃｍ2 となる。その結果、膨張弁２０の
入口側（高圧側）と出口側（低圧側）の圧力差が増加
し、出口側から噴出する冷媒も多くなる。したがって、
相対的に圧縮機１２による吸引圧力は低くなり、冷却器
１の圧力が高くなって蒸発温度が上がり、冷却器１の温
度を先の除湿時の時に比べ、上昇させて着霜した霜を溶
かすことができる。At this time, since the refrigerant is cooled by the outside condenser 13 having a higher temperature than the cool air of the cooler 1, the condensing pressure is higher than that of the reheater 2, ie, 15 kg / cm.
A 2 ~17kg / cm 2. As a result, the pressure difference between the inlet side (high pressure side) and the outlet side (low pressure side) of the expansion valve 20 increases, and the amount of refrigerant ejected from the outlet side also increases. Therefore,
The suction pressure of the compressor 12 is relatively low, the pressure of the cooler 1 is high, the evaporating temperature rises, and the temperature of the cooler 1 is raised to melt the frosted frost by increasing the temperature of the cooler 1 as compared with the previous dehumidification. be able to.
【００３３】このような過程を順次繰り返し、冷却器１
の蒸発温度を、−１４〜−１８度のより低い温度まで下
げて絶対湿度を低下させることができるので、例えば図
３に示すように、除湿水量を多く生じさせることができ
る。Such a process is sequentially repeated, and the cooler 1
Can be reduced to a lower temperature of −14 to −18 degrees to lower the absolute humidity, so that, for example, as shown in FIG. 3, a large amount of dehumidified water can be generated.
【００３４】したがって、圧縮機のパワーアップやエン
トロピーの高い冷媒を使用せずに、庫内に置かれた食品
などを効率よく乾燥することができる。Accordingly, foods and the like placed in the refrigerator can be efficiently dried without increasing the power of the compressor or using a refrigerant having a high entropy.
【００３５】図４に第２実施形態を示す。この形態は、
第１実施形態の冷却器１を第１と第２の冷却器１ａ，１
ｂとに分割し、分割した第１と第２の冷却器１ａ，１ｂ
に、それぞれ冷媒切り換え用のソレノイドバルブ２０
ａ，２０ｂと膨張弁３０とからなるバルブ２０ａ，２０
ｂ，３０を設け、並列に接続された再熱器２と凝縮器１
３とに接続したものである。各バルブ２０ａ，２０ｂ
は、温度コントローラ２１と接続されている。FIG. 4 shows a second embodiment. This form
The cooler 1 of the first embodiment is replaced with first and second coolers 1a, 1a.
b, and the divided first and second coolers 1a, 1b
And a solenoid valve 20 for switching the refrigerant, respectively.
a and 20b and expansion valves 30
b, 30 and reheater 2 and condenser 1 connected in parallel
3 is connected. Each valve 20a, 20b
Are connected to the temperature controller 21.
【００３６】この第１と第２の冷却器１ａ，１ｂは、両
冷却器１ａ，１ｂに同時に冷媒を供給した場合、決めら
れた１００％の冷凍能力を発揮するように設定されてい
る。The first and second coolers 1a and 1b are set so as to exhibit a predetermined 100% refrigerating capacity when the refrigerant is simultaneously supplied to both the coolers 1a and 1b.
【００３７】この形態では、第１と第２の冷却器１ａ，
１ｂとは、第１冷却器（５０％）＋第２冷却器（５０
％）＝圧縮機能力１００％に設定されている。In this embodiment, the first and second coolers 1a, 1a,
1b means the first cooler (50%) + the second cooler (50%)
%) = Is set to a compressor capacity of 100%.
【００３８】また、凝縮器１３作動時の両冷却器１ａ，
１ｂの蒸発温度は、それぞれ、霜の着かない蒸発温度
（０度）以上になるように圧縮機１２の出力は設定され
ている。When the condenser 13 is operated, both the coolers 1a,
The output of the compressor 12 is set so that the evaporation temperature of 1b is equal to or higher than the evaporation temperature at which frost does not form (0 degree).
【００３９】また、この形態では、上記温度コントロー
ラ２１のＡ接点とＢ接点を凝縮器用ソレノイドバルブ１
６と再熱器用ソレノイドバルブ１８と接続してあり、再
熱器２と凝縮器１３とをオン・オフすることで乾燥温度
をほぼ一定に保ようにしてある。Further, in this embodiment, A contact and B contact condenser solenoid valve 1 of the temperature controller 21
6 and a solenoid valve 18 for the reheater, and the drying temperature is kept almost constant by turning on and off the reheater 2 and the condenser 13.
【００４０】すなわち、再熱器２をオンすることで送風
温度を上昇させ、オフすることで下降させることができ
る。That is, the blower temperature can be raised by turning on the reheater 2 and lowered by turning it off.
【００４１】他の構成及び作用については第１実施形態
と同じなので、その説明は省略する。The other configuration and operation are the same as those of the first embodiment, and the description thereof is omitted.
【００４２】この形態は上記のように構成されており、
温度コントローラ２１は、まず、再熱器２をオンとし、
第１冷却器１ａをオンとして、第２冷却器１ｂをオフと
する。This embodiment is configured as described above.
The temperature controller 21 turns on the reheater 2 first,
The first cooler 1a is turned on, and the second cooler 1b is turned off.
【００４３】すなわち、圧縮機１２によって圧縮吐出さ
れた高温高圧の冷媒ガスを再熱器２に供給し、再熱器２
の温度を上昇させる。また、再熱器２により冷却されて
液化され、レシーバタンク１４に溜まった冷媒は膨張弁
３０にて減圧され、第１冷却器１ａに供給される。その
ため、第１冷却器１ａの蒸発温度は低下する。[0043] That is, by supplying the high-temperature high-pressure refrigerant gas compressed discharge by the compressor 12 to the reheater 2, reheater 2
Raise the temperature of. The refrigerant cooled and liquefied by the reheater 2 and accumulated in the receiver tank 14 is decompressed by the expansion valve 30 and supplied to the first cooler 1a. Therefore, the evaporation temperature of the first cooler 1a decreases.
【００４４】このとき、第１冷却器１ａに供給される冷
媒は、上述したように、第１冷却器１ａ＋第２冷却器１
ｂ＝圧縮機能力１００％を出力するものなので、０度よ
りもずっと低い蒸発温度、例えば、この形態では、−１
５度程度に低下させることができるようになっている。
そのため、この低い蒸発温度により除湿することができ
るようになっている。At this time, the refrigerant supplied to the first cooler 1a is, as described above, the first cooler 1a + the second cooler 1a.
b = Since outputs 100% compressor capacity, much lower evaporation temperature than 0 °, for example, in this embodiment, -1
It can be lowered to about 5 degrees.
Therefore, it is possible to dehumidify by this low evaporation temperature.
【００４５】このとき、再熱器２は、圧縮機１２によっ
て圧縮吐出された高温高圧の冷媒ガスによって温度が上
昇し、第１冷却器１ａからの冷風を加温して庫内に送風
する。[0045] At this time, reheater 2, the temperature is raised by the refrigerant gas of high temperature and high pressure compressed discharge by the compressor 12, for blowing the cold air from the first cooler 1a to warming in the refrigerator.
【００４６】また、第１冷却器１ａには、このように温
度が低下すると霜が着く。庫内温度が設定値以上に上昇
すると、温度コントローラ２１が作動し、再熱器２をオ
フとし、凝縮器１３をオンとして、第１冷却器１ａと第
２冷却器１ｂとをオンとする。When the temperature of the first cooler 1a decreases, frost is formed. When the internal temperature rises above the set value, the temperature controller 21 operates to turn off the reheater 2, turn on the condenser 13, and turn on the first cooler 1a and the second cooler 1b.
【００４７】すると、圧縮機１２によって圧縮吐出され
た高温高圧の冷媒ガスは凝縮器１３で冷却されて液化さ
れ、レシーバタンク１４に溜まり、膨張弁３０で減圧さ
れて、第１冷却器１ａと第２冷却器１ｂとに供給され
る。[0047] Then, the refrigerant gas of high temperature and high pressure compressed discharge by the compressor 12 is liquefied is cooled in the condenser 13, it accumulates in the receiver tank 14 is depressurized by the expansion valve 30, a first cooler 1a first 2 cooler 1b.
【００４８】このとき、第１冷却器１ａと第２冷却器１
ｂとは、両冷却器１ａ，１ｂで圧縮機能力１００％を出
力するように設定され、また、霜の着かない蒸発温度
（０度）になるように圧縮機出力が設定されている。し
たがって、第１冷却器１ａの表面温度は０度程度まで上
昇し、表面に着いた霜が融ける。融けた霜はドレンパイ
プで外部に排出される。At this time, the first cooler 1a and the second cooler 1
b and is both cooler 1a, is set to output the 100% compressor capacity 1b, also the compressor output to be the evaporation temperature not arrive frost (0 °) is set. Therefore, the surface temperature of the first cooler 1a rises to about 0 degrees, and the frost that has reached the surface melts. The melted frost is discharged to the outside through a drain pipe.
【００４９】庫内温度が設定値以下になると、再び温度
コントローラ２１が作動し、再熱器２をオン、第１冷却
器１ａをオン、第２冷却器１ｂをオフとする。When the internal temperature falls below the set value, the temperature controller 21 operates again to turn on the reheater 2, turn on the first cooler 1a, and turn off the second cooler 1b.
【００５０】このような過程を繰り返すことにより、絶
対湿度を下げることができ、より低い相対湿度の空気を
作ることができる。By repeating such a process, the absolute humidity can be reduced, and air having a lower relative humidity can be produced.
【００５１】したがって、圧縮機のパワーアップやエン
トロピーの高い冷媒を使用せずに、除湿水量を多く生じ
させることができるようになり、庫内に置かれた食品な
どを効率よく乾燥することができる。Therefore, a large amount of dehumidifying water can be generated without increasing the power of the compressor or using a refrigerant having a high entropy, and the food and the like placed in the refrigerator can be efficiently dried. .
【００５２】また、蒸発温度を低下させ、次に蒸発温度
を０度まで上昇させて除霜を行うので、冷却器１ａに霜
が着かず乾燥効率も向上させることができる。Further, since the defrosting is performed by lowering the evaporation temperature and then raising the evaporation temperature to 0 ° C., the frost does not adhere to the cooler 1a, and the drying efficiency can be improved.
【００５３】[0053]
【発明の効果】この発明は、以上のように構成し、絶対
湿度を下げて乾燥するので、乾燥時間を短縮し、かつ、
効率よく乾燥ができる。The present invention is constructed as described above, and is dried at a reduced absolute humidity, so that the drying time is reduced, and
Drying can be performed efficiently.
【００５４】また、同時に蒸発温度を上昇させて除霜を
行うので、霜による乾燥効率の低下を排除できる。Further, since the defrosting is performed by raising the evaporation temperature at the same time, a decrease in the drying efficiency due to the frost can be eliminated.
【００５５】そのため、圧縮機のパワーアップやエント
ロピーの高い冷媒を使用せずに除湿水量の低下を克服し
て乾燥時間を短縮し、かつ、エネルギー効率の向上を図
れる。Therefore, it is possible to overcome the decrease in the amount of dehumidified water and shorten the drying time and improve the energy efficiency without increasing the power of the compressor or using a refrigerant having a high entropy.
【図１】実施形態の正面図FIG. 1 is a front view of an embodiment.
【図２】第１実施形態の回路図FIG. 2 is a circuit diagram of the first embodiment.
【図３】第１実施形態の作用説明図FIG. 3 is a diagram illustrating the operation of the first embodiment.
【図４】第２実施形態の回路図FIG. 4 is a circuit diagram of a second embodiment.
【図５】従来例の作用説明図FIG. 5 is a diagram illustrating the operation of a conventional example.
【図６】従来例の作用説明図FIG. 6 is a diagram illustrating the operation of a conventional example.
１ 冷却器 １ａ 第１冷却器 １ｂ 第２冷却器 ２ 再熱器 ３ ファン １０ 乾燥室 １２ 圧縮器 １３ 凝縮器 １４ レシーバータンク １５ ヒータ １６ 凝縮器用ソレノイド １７ 逆止弁 １８ 再熱器用ソレノイド １９ ドライコア ２０ａ 冷媒切り換え用ソレノイドバルブ ２０ｂ 冷媒切り換え用ソレノイドバルブ ２１ 温度コントローラ ３０ 膨張弁DESCRIPTION OF SYMBOLS 1 Cooler 1a 1st cooler 1b 2nd cooler 2 Reheater 3 Fan 10 Drying room 12 Compressor 13 Condenser 14 Receiver tank 15 Heater 16 Condenser solenoid 17 Check valve 18 Reheater solenoid 19 Dry core 20a Refrigerant Switching solenoid valve 20b Refrigerant switching solenoid valve 21 Temperature controller 30 Expansion valve
Claims (2)
器（２）を配置し、庫外に凝縮器（１３）と圧縮機（１
２）とを配置し、前記圧縮機（１２）に再熱器（２）と
凝縮器（１３）とを冷媒の切り換え手段（１６，１８）
を介して並列に接続し、その圧縮機（１２）に再熱器
（２）と凝縮器（１３）とを並列に接続した直列回路を
レシーバタンク（１４）と膨張弁（２０）とを介して上
記冷却器（１）に接続し、上記乾燥庫（１０）内の相対
湿度が低下すると、切り換え手段（１６，１８）を切り
換え、冷媒を圧縮機（１２）から再熱器（２）を介して
冷却器（１）へ供給して冷却器（１）の蒸発温度を低下
させ、一方、冷却器（１）の蒸発温度が低下して冷却器
（１）に着霜を生じ、乾燥庫（１０）内の温度が設定温
度より高くなると、切り換え手段（１６，１８）を切り
換えて冷媒を圧縮機（１２）から凝縮器（１３）を介し
て冷却器（１）へ供給し、冷却器（１）の蒸発温度を上
昇させて除霜することを繰り返して行うようにした冷風
乾燥機。1. A cooler (1) and a reheater (2) are arranged in a drying cabinet (10), and a condenser (13) and a compressor (1) are arranged outside the cabinet.
2), and the compressor (12) is provided with a reheater (2) and a condenser (13) by means of refrigerant switching means (16, 18).
And a series circuit in which a reheater (2) and a condenser (13) are connected in parallel to the compressor (12) through a receiver tank (14) and an expansion valve (20). When the relative humidity in the drying cabinet (10) decreases, the switching means (16, 18) is switched to switch the refrigerant from the compressor (12) to the reheater (2). Supply to the cooler (1) via the cooling unit (1) to lower the evaporating temperature, while the evaporating temperature of the cooler (1) decreases to cause frost on the cooler (1) and cause the drying cabinet When the temperature in (10) becomes higher than the set temperature, the switching means (16, 18) is switched to supply the refrigerant from the compressor (12) to the cooler (1) via the condenser (13). (1) A cold-air dryer that repeatedly performs the defrosting by increasing the evaporation temperature.
（１ａ，１ｂ）とに分割し、分割した第１と第２の冷却
器（１ａ，１ｂ）にそれぞれバルブ（２０ａ，２０ｂ）
を設けて上記直列回路と並列に接続し、上記再熱器
（２）が作動した際に、前記第１と第２の冷却器（１
ａ，１ｂ）のいずれか一方のみに冷媒を供給し、上記再
熱器（２）が停止した際に前記第１と第２の両方の冷却
器（１ａ，１ｂ）に冷媒を供給するようにした冷風乾燥
機。2. The cooler (1) is divided into first and second coolers (1a, 1b), and each of the divided first and second coolers (1a, 1b) has a valve (20a). , 20b)
And connected in parallel with the series circuit, and when the reheater (2) operates, the first and second coolers (1)
a, supplies only one of the refrigerant 1b), to supply coolant to the reheater (2) wherein both the first and second condenser when the stops (1a, 1b) Cold air dryer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10102581A JP3096673B2 (en) | 1998-04-14 | 1998-04-14 | Cold air dryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10102581A JP3096673B2 (en) | 1998-04-14 | 1998-04-14 | Cold air dryer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11294896A JPH11294896A (en) | 1999-10-29 |
| JP3096673B2 true JP3096673B2 (en) | 2000-10-10 |
Family
ID=14331205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10102581A Expired - Lifetime JP3096673B2 (en) | 1998-04-14 | 1998-04-14 | Cold air dryer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3096673B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010156513A (en) * | 2008-12-27 | 2010-07-15 | Daikin Ind Ltd | Air conditioning device |
| CN101818986B (en) * | 2010-04-23 | 2011-07-20 | 中国科学院广州能源研究所 | Heat-accumulating solar energy and heat pump combined drying device capable of realizing multi-mode operation |
| JP6801857B2 (en) * | 2016-07-11 | 2020-12-16 | 煉三 上田 | Cold air dryer |
| CN114046636A (en) * | 2021-11-29 | 2022-02-15 | 湖南康捷生物科技有限公司 | Amylase drying equipment with prevent flying dust structure |
-
1998
- 1998-04-14 JP JP10102581A patent/JP3096673B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11294896A (en) | 1999-10-29 |
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