JPH1163769A - Refrigerator for refrigerated container - Google Patents

Refrigerator for refrigerated container

Info

Publication number
JPH1163769A
JPH1163769A JP21746897A JP21746897A JPH1163769A JP H1163769 A JPH1163769 A JP H1163769A JP 21746897 A JP21746897 A JP 21746897A JP 21746897 A JP21746897 A JP 21746897A JP H1163769 A JPH1163769 A JP H1163769A
Authority
JP
Japan
Prior art keywords
evaporator
heat exchanger
reheat heat
hot gas
condenser
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.)
Pending
Application number
JP21746897A
Other languages
Japanese (ja)
Inventor
Satoru Sakae
覚 阪江
Kan Ikemiya
完 池宮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Daikin Industries Ltd filed Critical Daikin Industries Ltd
Priority to JP21746897A priority Critical patent/JPH1163769A/en
Publication of JPH1163769A publication Critical patent/JPH1163769A/en
Pending legal-status Critical Current

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  • Defrosting Systems (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

PROBLEM TO BE SOLVED: To obtain a refrigerator for refrigerated container having reheat function in which switching can be made between standard mode and dehumidification mode easily. SOLUTION: In the refrigerator for a refrigerated container including a coolant circuit comprising a compressor 1, a condenser 2, a pressure reducing mechanism 4 and an evaporator 5 having an inner fan 8, a reheat-exchanger 15 being supplied with delivery gas coolant (i.e., hot gas) from the compressor 1 while bypassing the condenser 2 and the pressure reducing mechanism 4 is disposed on the leeward of the evaporator 5 along with a valve 14 for controlling the delivery gas coolant (i.e., hot gas) to the reheat-exchanger 15 during dehumidification mode operation. During dehumidification mode operation, the delivery gas coolant (i.e., hot gas) to the reheat-exchanger 15 is started by the control valve 14 and the dehumidified air from the evaporator 5 is reheated by the high temperature delivery gas coolant (i.e., hot gas) and the relative humidity thereof is lowered.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本願発明は、冷凍コンテナ用
冷凍装置に関するものである
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating apparatus for a refrigerating container.

【0002】[0002]

【従来の技術】一般に、冷凍コンテナ用冷凍装置は、圧
縮機、凝縮器、電子膨張弁および蒸発器を順次接続して
なる冷媒回路を備えて構成されており、圧縮機から吐出
されたガス冷媒を凝縮器において凝縮液化し、電子膨張
弁で減圧した後蒸発器において蒸発気化させ、その際庫
内空気を冷却して冷凍用に供することとなっている。
2. Description of the Related Art Generally, a refrigeration apparatus for a refrigeration container is provided with a refrigerant circuit in which a compressor, a condenser, an electronic expansion valve, and an evaporator are sequentially connected, and a gas refrigerant discharged from the compressor is provided. Is condensed and liquefied in a condenser, decompressed by an electronic expansion valve, and then evaporated and vaporized in an evaporator. At that time, the air in the refrigerator is cooled and provided for freezing.

【0003】上記のような構成の冷凍コンテナ用冷凍装
置により球根類のように低湿度で保管する必要のある保
管物を保管する場合には、蒸発器により冷却除湿された
空気を再加熱して相対湿度を低くした状態で庫内へ吹き
出すようにする方法が採用されることとなっている。
[0003] In the case of storing storage items such as bulbs which need to be stored at low humidity by the refrigeration apparatus for a refrigeration container having the above configuration, the air cooled and dehumidified by the evaporator is reheated. A method in which the air is blown into the refrigerator with the relative humidity kept low has been adopted.

【0004】上記再加熱のために蒸発器の風下側に電気
ヒータを配設する方法が従来から採用されてきている。
A method of arranging an electric heater on the downwind side of the evaporator for the reheating has been conventionally adopted.

【0005】ところが、上記したように庫内への吹出空
気を再加熱するために電気ヒータを用いた場合、以下に
述べるような問題が生ずる。
However, when an electric heater is used to reheat air blown into the refrigerator as described above, the following problems occur.

【0006】電気ヒータは、定期的なメンテナンスが
必要であるとともに、電気ヒータ分の余分な入力が必要
となる。
[0006] The electric heater requires regular maintenance and extra input for the electric heater.

【0007】電気ヒータの表面温度が高温(例えば、
250℃程度)となるため、蒸発器のドレン水がヒータ
面で再蒸発し、吹出空気を加湿してしまうおそれがあ
る。
The surface temperature of the electric heater is high (for example,
(About 250 ° C.), the drain water of the evaporator may re-evaporate on the heater surface, and humidify the blown air.

【0008】電気ヒータ用の保護装置が必要となると
ともに、該保護装置のメンテナンスも必要となる。
[0008] A protection device for the electric heater is required, and maintenance of the protection device is also required.

【0009】構造上吹出空気との接触面積が十分に得
られないため効率が悪い。
Due to the structure, a sufficient contact area with the blown air cannot be obtained, resulting in poor efficiency.

【0010】電気ヒータは、加熱時と非加熱時とで熱
変形するため、取付構造に伸縮性を持たす必要があり、
取付構造が複雑となる。
[0010] Since the electric heater is thermally deformed when heated and not heated, the mounting structure needs to have elasticity.
The mounting structure becomes complicated.

【0011】[0011]

【発明が解決しようとする課題】上記のような電気ヒー
タを用いた場合の問題を解消するものとして、蒸発器に
おける冷媒流通経路の途中に圧縮機からの吐出ガス冷媒
(即ち、ホットガス)を凝縮器を側路して供給し、蒸発
器の一部を吹出空気再加熱用の再熱熱交換器として作用
させるようにしたものが提案されている(例えば、特開
平8−285390号公報参照)。
As a solution to the above-mentioned problem when an electric heater is used, a discharge gas refrigerant (that is, hot gas) discharged from a compressor is provided in a refrigerant flow path in an evaporator. There has been proposed a type in which a condenser is supplied by a bypass and a part of the evaporator is made to function as a reheat heat exchanger for reheating blown air (for example, see JP-A-8-285390). ).

【0012】ところが、上記公知例のものでは、蒸発器
における冷媒流通経路の途中に吐出ガス冷媒(即ち、ホ
ットガス)を合流させる構造となっているため、前記吐
出ガス冷媒(即ち、ホットガス)を減圧するために蒸発
器用の絞り機構とは別の絞り機構が必要となるととも
に、再熱熱交換器として作用している部分が蒸発器とし
ている作用している部分からの熱伝導の影響を受けやす
くなる。
However, the above-mentioned known example has a structure in which the discharged gas refrigerant (ie, hot gas) is merged in the middle of the refrigerant flow path in the evaporator. In order to reduce the pressure, a throttle mechanism different from the throttle mechanism for the evaporator is required, and the effect of heat conduction from the part acting as the evaporator in the part acting as the reheat heat exchanger Easier to receive.

【0013】また、上記構成の冷凍コンテナ用冷凍装置
においては、保管物の種類により再熱熱交換器への吐出
ガス冷媒(即ち、ホットガス)供給を停止する標準モー
ドと再熱熱交換器への吐出ガス冷媒(即ち、ホットガ
ス)供給を開始する除湿モードとに運転を切り換える必
要がある。
In the refrigerating apparatus for a refrigerating container having the above-mentioned structure, the standard mode in which the supply of the discharged gas refrigerant (that is, hot gas) to the reheat heat exchanger is stopped depending on the type of the storage object, and the reheat heat exchanger is operated in the standard mode. It is necessary to switch the operation to the dehumidification mode in which the supply of the discharge gas refrigerant (that is, hot gas) is started.

【0014】本願発明は、上記の点に鑑みてなされたも
ので、再熱機能を有する冷凍コンテナ用冷凍装置におけ
る標準モードと除湿モードとの切換をコストアップさせ
ることなく行うようにすることを目的とするものであ
る。
[0014] The present invention has been made in view of the above points, and has as its object to switch between a standard mode and a dehumidifying mode in a refrigeration container refrigeration apparatus having a reheating function without increasing the cost. It is assumed that.

【0015】[0015]

【課題を解決するための手段】本願発明(請求項1の発
明)では、上記課題を解決するための手段として、圧縮
機1、凝縮器2、減圧機構4および庫内ファン8を併設
した蒸発器5を順次接続してなる冷媒回路を備えた冷凍
コンテナ用冷凍装置において、前記蒸発器5の風下側に
位置し、前記圧縮機1の吐出ガス冷媒(即ち、ホットガ
ス)が前記凝縮器2および減圧機構4を側路して供給さ
れる再熱熱交換器15と、除湿モード運転時において前
記再熱熱交換器15への吐出ガス冷媒(即ち、ホットガ
ス)の供給を制御する制御弁14とを付設している。
According to the invention of the present application (the invention of claim 1), as means for solving the above-mentioned problems, an evaporator provided with a compressor 1, a condenser 2, a pressure reducing mechanism 4, and a fan 8 in a refrigerator is provided. In the refrigeration apparatus for a refrigeration container provided with a refrigerant circuit formed by sequentially connecting the compressors 5, the refrigerant discharged from the compressor 1 (that is, hot gas) is located on the leeward side of the evaporator 5, And a reheat heat exchanger 15 that is supplied by-passing the pressure reducing mechanism 4, and a control valve that controls the supply of the discharge gas refrigerant (that is, hot gas) to the reheat heat exchanger 15 during the dehumidification mode operation. 14 is attached.

【0016】上記のように構成したことにより、除湿モ
ード運転時においては、制御弁14により再熱熱交換器
15への吐出ガス冷媒(即ち、ホットガス)供給が開始
され、蒸発器5により冷却除湿された吹出空気は、再熱
熱交換器15に供給された高温の吐出ガス冷媒(即ち、
ホットガス)により再加熱されて相対湿度が低下せしめ
られる。従って、庫内への吹出空気は低湿度の空気とな
る。しかも、吐出ガス冷媒(即ち、ホットガス)が供給
される再熱熱交換器15は、蒸発器5とは別体構成とさ
れ且つ該蒸発器5の風下側に取り付けられることとなっ
ているため、余分な絞り機構を必要とせず、低コスト且
つ効率的な再熱機能を発揮できるとともに、再熱熱交換
器15への蒸発器7からの熱伝導も少なくなる。
With the above configuration, during the dehumidification mode operation, supply of the discharge gas refrigerant (that is, hot gas) to the reheat heat exchanger 15 by the control valve 14 is started, and cooling by the evaporator 5 is performed. The dehumidified blown air is supplied to the reheat heat exchanger 15 at a high temperature of the discharged gas refrigerant (ie,
Hot gas) to reduce the relative humidity. Therefore, the air blown into the storage is low-humidity air. In addition, the reheat heat exchanger 15 to which the discharged gas refrigerant (that is, hot gas) is supplied is configured separately from the evaporator 5 and attached to the leeward side of the evaporator 5. In addition, a low-cost and efficient reheating function can be exhibited without requiring an extra throttle mechanism, and heat conduction from the evaporator 7 to the reheat heat exchanger 15 is reduced.

【0017】請求項2の発明におけるように、前記再熱
熱交換器15を、前記凝縮器2の入口側から比例弁13
を介して分岐し、ドレンパンヒータ12を通って前記蒸
発器5の入口側に至るバイパス回路11において前記ド
レンパンヒータ12の上流側に介設するとともに、前記
制御弁14として、前記バイパス回路11において吐出
ガス冷媒(即ち、ホットガス)を前記再熱熱交換器15
あるいは該再熱熱交換器15とドレンパンヒータ12と
を側路して前記蒸発器5の入口側へ択一的に供給する三
方弁を用いた場合、ドレンパンヒータ12への吐出ガス
冷媒(即ち、ホットガス)供給を制御する既存の三方弁
を利用して再熱熱交換器15への吐出ガス冷媒(即ち、
ホットガス)供給を制御できることとなり、回路構成お
よび部品点数を低減することができる。
As described in the second aspect of the present invention, the reheat heat exchanger 15 is connected to the proportional valve 13 from the inlet side of the condenser 2.
And a bypass circuit 11 is provided upstream of the drain pan heater 12 through a drain pan heater 12 to the inlet side of the evaporator 5 through the drain pan heater 12, and discharges in the bypass circuit 11 as the control valve 14. A gas refrigerant (ie, hot gas) is supplied to the reheat heat exchanger 15.
Alternatively, in the case where a three-way valve which supplies the reheat heat exchanger 15 and the drain pan heater 12 to the inlet side of the evaporator 5 by way of a bypass is used, the gas refrigerant discharged to the drain pan heater 12 (ie, Using the existing three-way valve for controlling the supply of hot gas, the gas refrigerant discharged to the reheat heat exchanger 15 (ie,
Hot gas supply can be controlled, and the circuit configuration and the number of parts can be reduced.

【0018】また、請求項3の発明におけるように、前
記制御弁14を庫内空気の湿度Hに対応させて制御する
制御手段17を付設した場合、庫内空気の湿度Hを設定
値に保持することができる。
Further, when the control means 17 for controlling the control valve 14 in accordance with the humidity H of the inside air is provided as in the invention of claim 3, the humidity H of the inside air is maintained at a set value. can do.

【0019】[0019]

【発明の実施の形態】以下、添付の図面を参照して、本
願発明の好適な実施の形態について詳述する。
Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

【0020】この冷凍コンテナ用冷凍装置は、図1に示
すように、圧縮機1、凝縮器2、レシーバ3、減圧機構
として作用する電子膨張弁4および蒸発器5を順次接続
してなる冷媒回路を備え、前記レシーバ3から導かれる
液冷媒と前記蒸発器5から導かれるガス冷媒とを熱交換
させて前記液冷媒に過冷却を付与する過冷却用熱交換器
6を付設して構成されている。符号7は凝縮器2を冷却
するための庫外ファン、8は蒸発器3に庫内空気を供給
するための庫内ファンである。
As shown in FIG. 1, the refrigerating apparatus for a refrigerating container has a refrigerant circuit in which a compressor 1, a condenser 2, a receiver 3, an electronic expansion valve 4 acting as a pressure reducing mechanism, and an evaporator 5 are sequentially connected. A supercooling heat exchanger 6 for exchanging heat between the liquid refrigerant guided from the receiver 3 and the gas refrigerant guided from the evaporator 5 to apply supercooling to the liquid refrigerant. I have. Reference numeral 7 denotes an external fan for cooling the condenser 2, and reference numeral 8 denotes an internal fan for supplying internal air to the evaporator 3.

【0021】前記冷媒回路には、前記レシーバ3から導
かれる液冷媒の一部を前記圧縮機1の吸入側にインジェ
クションするリキッドインジェクション回路9が付設さ
れている。符号10はリキッドインジェクション時に開
作動される電磁開閉弁、19はインジェクションリキッ
ドを減圧するキャピラリチューブである。
The refrigerant circuit is provided with a liquid injection circuit 9 for injecting a part of the liquid refrigerant guided from the receiver 3 into the suction side of the compressor 1. Reference numeral 10 denotes an electromagnetic on-off valve that is opened at the time of liquid injection, and reference numeral 19 denotes a capillary tube that reduces the pressure of the injection liquid.

【0022】また、前記冷媒回路には、前記圧縮機1か
らの吐出ガス冷媒(即ち、ホットガス)の一部を前記凝
縮器2、前記レシーバ3および前記電子膨張弁4を側路
するとともにドレンパンヒータ12を経て前記蒸発器5
の入口側に導くバイパス回路11と、該バイパス回路1
1と前記凝縮器2側とに吐出ガス冷媒(即ち、ホットガ
ス)を比例分配する比例弁13と、前記吐出ガス冷媒
(即ち、ホットガス)を前記ドレンパンヒータ12を側
路して前記蒸発器5の入口側へ供給するための三方弁1
4とが付設されている。符号18は運転停止時に閉弁さ
れる電磁開閉弁である。
In the refrigerant circuit, a part of the refrigerant discharged from the compressor 1 (that is, hot gas) is bypassed by the condenser 2, the receiver 3, and the electronic expansion valve 4, and the drain pan is discharged. Through the heater 12, the evaporator 5
Circuit 11 leading to the inlet side of the
A proportional valve 13 for proportionally distributing a discharge gas refrigerant (that is, hot gas) to the condenser 1 and the condenser 2 side; Three-way valve 1 for supplying to the inlet side of 5
4 are attached. Reference numeral 18 denotes an electromagnetic on-off valve that is closed when the operation is stopped.

【0023】前記バイパス回路11には、前記蒸発器5
の風下側に位置し且つ前記ドレンパンヒータ12の上流
側に位置して再熱熱交換器15が介設されている。該再
熱熱交換器15は、バイパス回路11を介して供給され
る吐出ガス冷媒(即ち、ホットガス)により蒸発器5か
ら吹き出される吹出空気を再加熱して相対湿度を低下さ
せる作用をなす。
The bypass circuit 11 includes the evaporator 5
A reheat heat exchanger 15 is interposed at a leeward side of the drain pan heater and at an upstream side of the drain pan heater 12. The reheat heat exchanger 15 functions to reheat the air blown out of the evaporator 5 by the discharge gas refrigerant (that is, hot gas) supplied through the bypass circuit 11 to lower the relative humidity. .

【0024】前記比例弁13は、前記蒸発器5の蒸発圧
力を制御するために、前記凝縮器2側への供給冷媒量と
バイパス回路11への供給冷媒量とを比例分配するよう
に作用する。
The proportional valve 13 acts to proportionally distribute the amount of refrigerant supplied to the condenser 2 and the amount of refrigerant supplied to the bypass circuit 11 in order to control the evaporating pressure of the evaporator 5. .

【0025】前記三方弁14は、除湿モード運転時にお
いて前記再熱熱交換器15への吐出ガス冷媒(即ち、ホ
ットガス)の供給を制御する制御弁として作用するもの
であり、庫内空気の湿度Hを検出する湿度センサー16
からの湿度情報を得た制御手段17からの制御信号によ
り切換制御されることとなっている。
The three-way valve 14 functions as a control valve for controlling the supply of the discharge gas refrigerant (ie, hot gas) to the reheat heat exchanger 15 during the dehumidification mode operation. Humidity sensor 16 for detecting humidity H
The switching is controlled by a control signal from the control means 17 which has obtained the humidity information from the control unit 17.

【0026】ついで、図2に示すフローチャートを参照
して、本実施の形態にかかる冷凍コンテナ用冷凍装置に
おける庫内湿度制御について詳述する。
Next, with reference to a flowchart shown in FIG. 2, the control of the humidity in the refrigerator in the refrigeration apparatus for a refrigeration container according to the present embodiment will be described in detail.

【0027】ステップS1において除湿モードをユーザ
が選択したか否かの判定がなされ、ここで肯定判定され
ると、ステップS2において湿度センサー16からの庫
内空気湿度Hが入力される。
At step S 1 , it is determined whether or not the user has selected the dehumidification mode. If the determination is affirmative, the humidity H in the compartment from the humidity sensor 16 is input at step S 2 .

【0028】そして、ステップS3およびステップS4
おいて検出湿度Hと上限値=H0+5%(ここで、H0
設定値)との比較および検出湿度Hと下限値=H0−5
%との比較がなされ、ステップS3においてH≧H0+5
%と判定されると(換言すれば、庫内空気湿度が高くな
り過ぎると)、ステップS5において三方弁14が再熱
熱交換器15へ吐出ガス冷媒(即ち、ホットガス)を供
給するように切り換えられて、蒸発器5からの吹出空気
が再加熱され、相対湿度が低下せしめられる。
Then, in steps S 3 and S 4 , the detected humidity H and the upper limit = H 0 + 5% (where H 0 :
Set value) and the detected humidity H and the lower limit = H 0 -5
% Compared with is made, H ≧ H 0 +5 in step S 3
% And it is determined (in other words, when the air inside the humidity becomes too high), the three-way valve 14 is discharged gas refrigerant to the re-heat heat exchanger 15 in step S 5 (i.e., hot gas) to supply , The air blown out from the evaporator 5 is reheated, and the relative humidity is reduced.

【0029】一方、ステップS4においてH≦H0−5%
と判定されると(換言すれば、庫内空気湿度が低くなり
過ぎると)、ステップS6において三方弁14が蒸発器
5へ吐出ガス冷媒(即ち、ホットガス)をバイパスさせ
るように切り換えられて、再熱熱交換器15による吹出
空気の再加熱が停止される。
On the other hand, H ≦ H 0 -5% in step S 4
If it is determined (in other words, when the air inside the humidity is too low), the three-way valve 14 is discharged gas refrigerant to the evaporator 5 in step S 6 (i.e., hot gas) is switched so as to bypass the Then, the reheating of the blown air by the reheating heat exchanger 15 is stopped.

【0030】なお、ステップS4において否定判定され
た場合と、ステップS5およびステップS6の処理の後と
にはステップS2に戻り庫内空気湿度Hの監視が継続さ
れる。
[0030] Incidentally, in the case where a negative determination is made in step S 4, the monitoring of the return-compartment air humidity H in step S 2 is continued in the following processing of steps S 5 and S S 6.

【0031】上記したように、本実施の形態において
は、除湿モード運転時においては、制御弁14により再
熱熱交換器15への吐出ガス冷媒(即ち、ホットガス)
供給が開始され、蒸発器5により冷却除湿された吹出空
気は、再熱熱交換器15に供給された高温の吐出ガス冷
媒(即ち、ホットガス)により再加熱されて相対湿度が
低下せしめられる。従って、庫内への吹出空気は低湿度
の空気となる。しかも、吐出ガス冷媒(即ち、ホットガ
ス)が供給される再熱熱交換器15は、蒸発器5とは別
体構成とされ且つ該蒸発器5の風下側に取り付けられる
こととなっているため、余分な絞り機構を必要とせず、
低コスト且つ効率的な再熱機能を発揮できるとともに、
再熱熱交換器15への蒸発器7からの熱伝導も少なくな
る。
As described above, in the present embodiment, during operation in the dehumidifying mode, the control valve 14 controls the discharge gas refrigerant (ie, hot gas) discharged to the reheat heat exchanger 15.
The supply is started, and the blown air cooled and dehumidified by the evaporator 5 is reheated by the high-temperature discharge gas refrigerant (that is, hot gas) supplied to the reheat heat exchanger 15, so that the relative humidity is reduced. Therefore, the air blown into the storage is low-humidity air. In addition, the reheat heat exchanger 15 to which the discharged gas refrigerant (that is, hot gas) is supplied is configured separately from the evaporator 5 and attached to the leeward side of the evaporator 5. Without the need for an extra aperture mechanism,
While being able to demonstrate low cost and efficient reheating function,
The heat conduction from the evaporator 7 to the reheat heat exchanger 15 is also reduced.

【0032】[0032]

【発明の効果】本願発明(請求項1の発明)によれば、
圧縮機1、凝縮器2、減圧機構4および庫内ファン8を
併設した蒸発器5を順次接続してなる冷媒回路を備えた
冷凍コンテナ用冷凍装置において、前記蒸発器5の風下
側に位置し、前記圧縮機1の吐出ガス冷媒(即ち、ホッ
トガス)が前記凝縮器2および減圧機構4を側路して供
給される再熱熱交換器15と、除湿モード運転時におい
て前記再熱熱交換器15への吐出ガス冷媒(即ち、ホッ
トガス)の供給を制御する制御弁14とを付設して、除
湿モード運転時においては、制御弁14により再熱熱交
換器15への吐出ガス冷媒(即ち、ホットガス)供給が
開始され、蒸発器5により冷却除湿された吹出空気が、
再熱熱交換器15に供給された高温の吐出ガス冷媒(即
ち、ホットガス)により再加熱されて相対湿度が低下せ
しめられるようにしたので、簡単な構成により庫内への
吹出空気を低湿度の空気とすることができるという優れ
た効果がある。しかも、吐出ガス冷媒(即ち、ホットガ
ス)が供給される再熱熱交換器15は、蒸発器5とは別
体構成とされ且つ該蒸発器5の風下側に取り付けられる
こととなっているため、余分な絞り機構を必要とせず、
低コスト且つ効率的な再熱機能を発揮できるとともに、
再熱熱交換器15への蒸発器7からの熱伝導も少なくな
る。
According to the invention of the present application (the invention of claim 1),
In a refrigeration container refrigeration apparatus provided with a refrigerant circuit formed by sequentially connecting a compressor 1, a condenser 2, a decompression mechanism 4, and an evaporator 5 provided with an in-compartment fan 8, the refrigeration apparatus is located downstream of the evaporator 5. A reheat heat exchanger 15 to which the gas refrigerant discharged from the compressor 1 (that is, hot gas) is supplied by way of the condenser 2 and the pressure reducing mechanism 4, and the reheat heat exchange during the dehumidification mode operation. A control valve 14 for controlling the supply of the discharge gas refrigerant (that is, hot gas) to the heat exchanger 15 is provided. In the dehumidification mode operation, the control valve 14 controls the discharge gas refrigerant (the hot gas) to the reheat heat exchanger 15. That is, the supply of hot gas) is started, and the blown air cooled and dehumidified by the evaporator 5 is
Since the relative humidity is reduced by being reheated by the high-temperature discharge gas refrigerant (that is, hot gas) supplied to the reheat heat exchanger 15, the air blown into the storage can be reduced to a low humidity by a simple configuration. There is an excellent effect that air can be obtained. In addition, the reheat heat exchanger 15 to which the discharged gas refrigerant (that is, hot gas) is supplied is configured separately from the evaporator 5 and attached to the leeward side of the evaporator 5. Without the need for an extra aperture mechanism,
While being able to demonstrate low cost and efficient reheating function,
The heat conduction from the evaporator 7 to the reheat heat exchanger 15 is also reduced.

【0033】請求項2の発明におけるように、前記再熱
熱交換器15を、前記凝縮器2の入口側から比例弁13
を介して分岐し、ドレンパンヒータ12を通って前記蒸
発器5の入口側に至るバイパス回路11において前記ド
レンパンヒータ12の上流側に介設するとともに、前記
制御弁14として、前記バイパス回路11において吐出
ガス冷媒(即ち、ホットガス)を前記再熱熱交換器15
あるいは該再熱熱交換器15とドレンパンヒータ12と
を側路して前記蒸発器5の入口側へ択一的に供給する三
方弁を用いた場合、ドレンパンヒータ12への吐出ガス
冷媒(即ち、ホットガス)供給を制御する既存の三方弁
を利用して再熱熱交換器15への吐出ガス冷媒供給を制
御できることとなり、回路構成および部品点数を低減す
ることができる。
As in the second aspect of the present invention, the reheat heat exchanger 15 is connected to the proportional valve 13 from the inlet side of the condenser 2.
And a bypass circuit 11 is provided upstream of the drain pan heater 12 through a drain pan heater 12 to the inlet side of the evaporator 5 through the drain pan heater 12, and discharges in the bypass circuit 11 as the control valve 14. A gas refrigerant (ie, hot gas) is supplied to the reheat heat exchanger 15.
Alternatively, in the case where a three-way valve which supplies the reheat heat exchanger 15 and the drain pan heater 12 to the inlet side of the evaporator 5 by way of a bypass is used, the gas refrigerant discharged to the drain pan heater 12 (ie, The supply of the discharge gas refrigerant to the reheat heat exchanger 15 can be controlled by using the existing three-way valve for controlling the supply of the hot gas, so that the circuit configuration and the number of parts can be reduced.

【0034】また、請求項3の発明におけるように、前
記制御弁14を庫内空気の湿度Hに対応させて制御する
制御手段17を付設した場合、庫内空気の湿度Hを設定
値に保持することができる。
In the case where the control means 17 for controlling the control valve 14 in accordance with the humidity H of the internal air is provided, the humidity H of the internal air is maintained at a set value. can do.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本願発明の実施の形態にかかる冷凍コンテナ用
冷凍装置の冷媒回路図である。
FIG. 1 is a refrigerant circuit diagram of a refrigeration container refrigeration apparatus according to an embodiment of the present invention.

【図2】本願発明の実施の形態にかかる冷凍コンテナ用
冷凍装置における庫内空気湿度制御を説明するフローチ
ャートである。
FIG. 2 is a flowchart illustrating control of air humidity in a refrigerator in the refrigeration apparatus for a refrigeration container according to the embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1は圧縮機、2は凝縮器、4は減圧機構(電子膨張
弁)、5は蒸発器、11はバイパス回路、12はドレン
パンヒータ、13は比例弁、14は制御弁(三方弁)、
15は再熱熱交換器、16は湿度センサー、17は制御
手段、Hは庫内空気湿度。
1 is a compressor, 2 is a condenser, 4 is a pressure reducing mechanism (electronic expansion valve), 5 is an evaporator, 11 is a bypass circuit, 12 is a drain pan heater, 13 is a proportional valve, 14 is a control valve (three-way valve),
15 is a reheat heat exchanger, 16 is a humidity sensor, 17 is control means, and H is the air humidity in the refrigerator.

─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───

【手続補正書】[Procedure amendment]

【提出日】平成9年8月21日[Submission date] August 21, 1997

【手続補正1】[Procedure amendment 1]

【補正対象書類名】図面[Document name to be amended] Drawing

【補正対象項目名】図1[Correction target item name] Fig. 1

【補正方法】変更[Correction method] Change

【補正内容】[Correction contents]

【図1】 FIG.

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 圧縮機(1)、凝縮器(2)、減圧機構
(4)および庫内ファン(8)を併設した蒸発器(5)
を順次接続してなる冷媒回路を備えた冷凍コンテナ用冷
凍装置であって、前記蒸発器(5)の風下側に位置し、
前記圧縮機(1)の吐出ガス冷媒が前記凝縮器(2)お
よび減圧機構(4)を側路して供給される再熱熱交換器
(15)と、除湿モード運転時において前記再熱熱交換
器(15)への吐出ガス冷媒の供給を制御する制御弁
(14)とを付設したことを特徴とする冷凍コンテナ用
冷凍装置。
An evaporator (5) provided with a compressor (1), a condenser (2), a pressure reducing mechanism (4) and a fan (8) in a refrigerator.
And a refrigeration apparatus for a refrigeration container provided with a refrigerant circuit formed by sequentially connecting the evaporator (5),
A reheat heat exchanger (15) to which the gas refrigerant discharged from the compressor (1) is supplied by-passing the condenser (2) and the pressure reducing mechanism (4), and the reheat heat exchanger during a dehumidification mode operation A refrigeration system for a refrigeration container, further comprising a control valve (14) for controlling the supply of the discharged gas refrigerant to the exchanger (15).
【請求項2】 前記再熱熱交換器(15)を、前記凝縮
器(2)の入口側から比例弁(13)を介して分岐し、
ドレンパンヒータ(12)を通って前記蒸発器(5)の
入口側に至るバイパス回路(11)において前記ドレン
パンヒータ(12)の上流側に介設するとともに、前記
制御弁(14)として、前記バイパス回路(11)にお
いて吐出ガス冷媒を前記再熱熱交換器(15)あるいは
該再熱熱交換器(15)とドレンパンヒータ(12)と
を側路して前記蒸発器(5)の入口側へ択一的に供給す
る三方弁を用いたことを特徴とする前記請求項1記載の
冷凍コンテナ用冷凍装置。
2. The reheat heat exchanger (15) branches off from the inlet side of the condenser (2) via a proportional valve (13),
In a bypass circuit (11) leading to the inlet side of the evaporator (5) through the drain pan heater (12), the bypass circuit is provided upstream of the drain pan heater (12), and is used as the control valve (14). In the circuit (11), the discharged gas refrigerant is transferred to the reheat heat exchanger (15) or the inlet side of the evaporator (5) by bypassing the reheat heat exchanger (15) and the drain pan heater (12). 2. The refrigeration apparatus for a refrigeration container according to claim 1, wherein a three-way valve that supplies an alternative is used.
【請求項3】 前記制御弁(14)を庫内空気の湿度
(H)に対応させて制御する制御手段(17)を付設し
たことを特徴とする前記請求項1および請求項2のいず
れか一項記載の冷凍コンテナ用冷凍装置。
3. A control means (17) for controlling the control valve (14) in accordance with the humidity (H) of the air in the refrigerator, the control means being provided with the control means (17). A refrigeration apparatus for a refrigeration container according to claim 1.
JP21746897A 1997-08-12 1997-08-12 Refrigerator for refrigerated container Pending JPH1163769A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21746897A JPH1163769A (en) 1997-08-12 1997-08-12 Refrigerator for refrigerated container

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21746897A JPH1163769A (en) 1997-08-12 1997-08-12 Refrigerator for refrigerated container

Publications (1)

Publication Number Publication Date
JPH1163769A true JPH1163769A (en) 1999-03-05

Family

ID=16704713

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21746897A Pending JPH1163769A (en) 1997-08-12 1997-08-12 Refrigerator for refrigerated container

Country Status (1)

Country Link
JP (1) JPH1163769A (en)

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KR100572917B1 (en) 2005-01-13 2006-04-24 한국공조기술개발(주) Dehumidification and freezing circuit saving power having double cooling construction
JP2010196915A (en) * 2009-02-23 2010-09-09 Mitsubishi Heavy Ind Ltd Refrigerating cycle system and method of controlling the refrigerating cycle system
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KR100572917B1 (en) 2005-01-13 2006-04-24 한국공조기술개발(주) Dehumidification and freezing circuit saving power having double cooling construction
JP2010196915A (en) * 2009-02-23 2010-09-09 Mitsubishi Heavy Ind Ltd Refrigerating cycle system and method of controlling the refrigerating cycle system
US20140096553A1 (en) * 2011-06-10 2014-04-10 Daikin Industries, Ltd. Refrigeration apparatus
US10012424B2 (en) * 2011-06-10 2018-07-03 Daikin Industries, Ltd. Refrigeration apparatus
JP2013122333A (en) * 2011-12-09 2013-06-20 Daikin Industries Ltd Container refrigeration apparatus
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US20150191305A1 (en) * 2012-07-31 2015-07-09 Daikin Industries, Ltd. Refrigeration device for container
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US9644881B2 (en) 2012-07-31 2017-05-09 Daikin Industries, Ltd. Refrigeration device for container
US9718612B2 (en) 2012-07-31 2017-08-01 Daikin Industries, Ltd. Refrigeration device for container
EP2881685B1 (en) * 2012-07-31 2019-03-13 Daikin Industries, Ltd. Container refrigeration device and control method thereof
EP2924376A4 (en) * 2012-11-22 2016-08-24 Daikin Ind Ltd Refrigeration device for container
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JP2014234959A (en) * 2013-06-04 2014-12-15 オリオン機械株式会社 Temperature control device
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