JP5831237B2 - Cold water / hot water or steam generator - Google Patents

Cold water / hot water or steam generator Download PDF

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JP5831237B2
JP5831237B2 JP2012004201A JP2012004201A JP5831237B2 JP 5831237 B2 JP5831237 B2 JP 5831237B2 JP 2012004201 A JP2012004201 A JP 2012004201A JP 2012004201 A JP2012004201 A JP 2012004201A JP 5831237 B2 JP5831237 B2 JP 5831237B2
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refrigerant
joint line
line portion
water
plate
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JP2013142524A (en
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勝利 松永
勝利 松永
幸博 徳永
幸博 徳永
久美 松矢
久美 松矢
浩司 松林
浩司 松林
伸二 堀川
伸二 堀川
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Miura Co Ltd
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本発明は、2枚の金属板を接合して冷媒流路を形成するプレート型熱交換器を備えた、冷水装置・温水装置又は蒸気発生装置に関する。   The present invention relates to a chilled water device / hot water device or a steam generator provided with a plate type heat exchanger that joins two metal plates to form a refrigerant flow path.

貯留される水中に置かれ、内部を通過する冷媒と水とを熱交換して冷水を製造し、必要に応じて負荷側に冷水を供給する冷水型の冷水装置や、冷媒が通る熱交換器表面に氷を生成させて、冷水を必要とするときに生成された氷を溶解させながら冷水を供給する蓄氷型の冷水装置(例えば、特許文献1参照。)が知られている。
従来、係る装置に用いられる熱交換器には、特許文献1に記載されているように、冷媒流路を蛇腹状に折り曲げた伝熱管と伝熱管の間にプレート状のフィンを構成させた熱交換器や、特許文献2に記載されているように、2枚の金属板を結合し、冷媒流路を膨管させて形成したプレート型の熱交換器が用いられている。
ところが、特許文献1に記載される熱交換器を用いた冷水装置においては、貯留された水の状況などによっては溶接部の品質不良、外部からの腐食、あるいは冷媒側の圧力上昇によって冷媒流路が損傷する可能性があり、特許文献2に記載されたプレート型の熱交換器では、流路を形成している接合部への繰り返し応力による疲労や接合部への水の浸入と凍結によって接合部が剥離する可能性がある。いずれの場合も、このように水中に置かれた熱交換器を用いた冷水装置においては、熱交換器の損傷によって冷媒と冷媒に混合されている冷媒油が水に漏出し、冷媒油によって水が汚染される危険性がある。
A cold water type chilled water device that supplies cold water to the load side as needed, and a heat exchanger through which the refrigerant passes. There is known an ice storage type chilled water device (see, for example, Patent Document 1) in which ice is generated on the surface and chilled water is supplied while melting the generated ice.
Conventionally, in a heat exchanger used in such a device, as described in Patent Document 1, heat in which a plate-like fin is formed between a heat transfer tube in which a refrigerant flow path is bent in a bellows shape and the heat transfer tube is used. As described in Patent Document 2, a plate-type heat exchanger formed by joining two metal plates and expanding a refrigerant flow path is used.
However, in the chilled water device using the heat exchanger described in Patent Document 1, depending on the state of the stored water, the quality of the welded portion, corrosion from the outside, or pressure increase on the refrigerant side may cause the refrigerant flow path. In the plate-type heat exchanger described in Patent Document 2, the joint is formed by fatigue due to repeated stress on the joint forming the flow path or water penetration into the joint and freezing. The part may peel off. In any case, in the chilled water device using the heat exchanger placed in the water in this way, the refrigerant oil mixed with the refrigerant and the refrigerant leaks into the water due to damage to the heat exchanger, and the refrigerant oil There is a risk of contamination.

熱交換器からの冷媒漏れを検出する手段としては、冷水を製造する蒸発器(熱交換器)の冷水入り口温度と蒸発器内の冷媒圧力を検出し、運転時に、蒸発器の冷媒圧力から算出される蒸発温度と冷水出口温度との差が運転用所定値より大きい状態が所定時間以上継続した場合は冷媒漏れを判断するものがある(例えば、特許文献3参照。)。   As a means to detect refrigerant leakage from the heat exchanger, the cold water inlet temperature of the evaporator (heat exchanger) that produces cold water and the refrigerant pressure in the evaporator are detected and calculated from the refrigerant pressure of the evaporator during operation When the state where the difference between the evaporation temperature and the cold water outlet temperature is greater than a predetermined value for operation continues for a predetermined time or longer, there is a case in which refrigerant leakage is determined (for example, see Patent Document 3).

特開2000−88297号公報JP 2000-88297 A 特開平8−200979号公報JP-A-8-200909 特開2010−210098号公報JP 2010-210098 A

冷媒油の漏れによる水の汚染を最小限に留めるには、できる限り早期の漏れ検出が必要である。しかし、特許文献3に記載された冷媒漏れの検出方法では、貯留されるタンク内の水温の変化は、漏れが起こったときの水の温度や貯留されている水の量による影響を受けてしまうため早期の検出は難しいといった問題がある。   In order to minimize water contamination due to refrigerant oil leaks, leak detection as early as possible is necessary. However, in the refrigerant leak detection method described in Patent Document 3, the change in the water temperature in the stored tank is affected by the temperature of the water when the leak occurs and the amount of the stored water. Therefore, there is a problem that early detection is difficult.

本発明の目的は、プレート型の熱交換器からの冷媒漏れを速やかに検出し、冷媒とともに漏れる冷媒油による水の汚染を防止をできるようにした、冷水装置・温水装置又は蒸気発生装置を提供することにある。   An object of the present invention is to provide a chilled water device, a hot water device, or a steam generator capable of quickly detecting refrigerant leakage from a plate-type heat exchanger and preventing water contamination by refrigerant oil leaking together with the refrigerant. There is to do.

上記の目的を達成するために、請求項1に記載の発明は、2枚の金属板を接合して冷媒流路を形成する冷却部となるプレート型熱交換器を備えた冷水装置・温水装置又は蒸気発生装置であって、前記2枚の金属板に、冷媒流路を形成する第1接合線部と、前記第1接合線部の外側に前記第1接合線部を囲むように第2接合線部を設け、第1接合線部と第2接合線部との間に形成される区画部に、該区画部内への冷媒漏れを検出する冷媒漏れ検出手段を設け、前記区画部は気密に形成され、前記冷媒漏れ検出手段は、前記区画部に設けられた前記区画部内に連通する圧力検出用導管と、該圧力検出用導管に設けられ前記区画部内の圧力を測定する圧力検出手段とからなり、前記プレート型熱交換器は複数用意され、各プレート型熱交換器の冷媒流路が並列に接続され、また、前記各プレート型熱交換器の前記区画部内は前記圧力検出用導管により相互に連通するように連通管が設けられ、前記区画部内の圧力を測定する前記圧力検出手段が前記連通管に設けられていることを特徴とする。 To achieve the above object, a first aspect of the present invention, cold water systems, hot water having a plate-type heat exchanger by bonding two metal plates composed of a cooling unit for forming a coolant channel An apparatus or a steam generator, wherein the two metal plates have a first joint line portion that forms a refrigerant flow path, and a first joint line portion that surrounds the first joint line portion outside the first joint line portion. Two junction line portions are provided, and a refrigerant leak detecting means for detecting refrigerant leakage into the partition portion is provided in a partition portion formed between the first joint line portion and the second joint line portion, and the partition portion is The refrigerant leak detection means is hermetically formed and includes a pressure detection conduit that communicates with the compartment provided in the compartment, and a pressure detector that measures the pressure in the compartment provided in the pressure detection conduit. A plurality of the plate type heat exchangers are prepared, and the refrigerant of each plate type heat exchanger The pressure detection means for measuring the pressure in the compartments, wherein the passages are connected in parallel, and the compartments of the plate-type heat exchangers are connected to each other by the pressure detection conduits. Means is provided in the communication pipe .

請求項1に記載の発明によれば、冷媒流路を形成する第1接合部の剥離等により冷媒流路からの冷媒漏れがあったとき、第2接合線部が第1接合線部を囲むように設けてあるので、冷媒及び冷媒油の水側への漏出が防止できるのに加えて、第1接合線部と第2接合線部との間に形成される区画部内で冷媒の漏れを検出することができる。   According to the first aspect of the present invention, the second joint line surrounds the first joint line when the refrigerant leaks from the coolant flow path due to peeling of the first joint forming the coolant flow path or the like. In addition to preventing leakage of refrigerant and refrigerant oil to the water side, the refrigerant leaks in the partition formed between the first joint line part and the second joint line part. Can be detected.

また、請求項に記載の発明によれば、冷媒流路を形成する第1接合部の剥離等により冷媒流路からの冷媒漏れがあったとき、第1接合線部と第2接合線部との間に形成される区画部内の圧力の上昇を圧力検出手段により検知することにより、冷媒の漏れを検出することができる。 Further, according to the invention described in claim 1, when a refrigerant leak from the refrigerant flow path by peeling of the first bonding portion to form a refrigerant flow passage, the first joining line portion and the second joining line section By detecting an increase in the pressure in the partition formed between the two by the pressure detection means, it is possible to detect the leakage of the refrigerant.

さらに、請求項に記載の発明によれば、冷水装置・温水装置又は蒸気発生装置に用いられる複数のプレート型熱交換器を幾つかの枚数ごとに並列に連通し、それぞれの群ごとに第1接合線部と第2接合線部との間に形成される区画部内の圧力を1つの圧力検出手段で検出するようにしたので、各プレート型熱交換器に個別の圧力検出手段を設ける必要はなく、コストを低く抑えながら、連接されているプレート型熱交換器群のいずれかに冷媒の漏れがあっても、確実に冷媒の漏れを検出することができる。 Further, according to the first aspect of the present invention, a plurality of plate heat exchangers used in the chilled water device, the hot water device, or the steam generator are communicated in parallel every several sheets, and the number of each type is changed for each group. Since the pressure in the partition portion formed between the one joint line portion and the second joint line portion is detected by one pressure detection means, it is necessary to provide individual pressure detection means for each plate type heat exchanger However, it is possible to reliably detect the refrigerant leak even if there is a refrigerant leak in any of the connected plate-type heat exchanger groups while keeping the cost low.

請求項に記載の発明は、2枚の金属板を接合して冷媒流路を形成する冷却部となるプレート型熱交換器を備えた冷水装置・温水装置又は蒸気発生装置であって、前記2枚の金属板に、冷媒流路を形成する第1接合線部と、前記第1接合線部の外側に前記第1接合線部を囲むように第2接合線部を設け、第1接合線部と第2接合線部との間に形成される区画部に、該区画部内への冷媒漏れを検出する冷媒漏れ検出手段を設け、前記冷媒漏れ検出手段は、前記区画部に設けられた前記区画部内に連通し大気に開放する開放状導管と、該開放状導管に設けられた温度検出手段とからなり、前記プレート型熱交換器は複数用意され、各プレート型熱交換器の冷媒流路が並列に接続され、また、前記各プレート型熱交換器の前記区画部内は前記開放状導管により相互に連通し、前記温度検出手段が前記開放状導管に設けられていることを特徴とする。 Invention of Claim 2 is a cold water apparatus, a hot water apparatus, or a steam generator provided with the plate type heat exchanger used as the cooling part which joins two metal plates and forms a refrigerant | coolant flow path, Two metal plates are provided with a first joint line portion that forms a coolant channel, and a second joint line portion is provided outside the first joint line portion so as to surround the first joint line portion. Refrigerant leakage detection means for detecting refrigerant leakage into the partition portion is provided in the partition portion formed between the line portion and the second joint line portion, and the refrigerant leak detection means is provided in the partition portion. An open conduit that communicates with the compartment and opens to the atmosphere, and temperature detecting means provided in the open conduit, and a plurality of the plate heat exchangers are prepared, and the refrigerant flow of each plate heat exchanger is The paths are connected in parallel, and the inside of the partition of each plate heat exchanger is the open shape. The temperature detecting means is provided in the open conduit and communicates with each other by a conduit .

請求項2に記載の発明によれば、冷媒流路を形成する第1接合部の剥離等により冷媒流路からの冷媒漏れがあったとき、第2接合線部が第1接合線部を囲むように設けてあるので、冷媒及び冷媒油の水側への漏出が防止できるのに加えて、第1接合線部と第2接合線部との間に形成される区画部内で冷媒の漏れを検出することができる。
また、請求項に記載の発明によれば、冷媒流路を形成する第1接合線部の剥離等により冷媒流路からの冷媒漏れがあったとき、前記区画内に漏れた冷媒が開放状導管を通って大気に放出される際の冷媒温度を開放状導管に設けた温度検出手段が検出するので、冷媒の漏れを検出することができる。
According to the second aspect of the present invention, when there is a refrigerant leak from the refrigerant flow path due to peeling of the first joint forming the refrigerant flow path, the second joint line surrounds the first joint line. In addition to preventing leakage of refrigerant and refrigerant oil to the water side, the refrigerant leaks in the partition formed between the first joint line part and the second joint line part. Can be detected.
Further, according to the invention of claim 2, when there is a refrigerant leak from the refrigerant flow path by peeling of the first joining line portion forming the refrigerant passage, the refrigerant that has leaked into the compartment is opened like Since the temperature detecting means provided in the open conduit detects the refrigerant temperature when it is discharged to the atmosphere through the conduit, leakage of the coolant can be detected.

さらに、請求項に記載の発明によれば、冷水装置・温水装置又は蒸気発生装置に用いられる複数のプレート型熱交換器を幾つかの枚数ごとに並列に連通して群を構成し、それぞれの群ごとに第1接合線部と第2接合線部との間に形成される区画部から大気へ放出される冷媒の温度を1つの温度検出手段で検出するようにしたので、各プレート型熱交換器に個別の圧力検出手段を設ける必要はなく、コストを低く抑えながら、連接されているプレート型熱交換器群のいずれかに冷媒の漏れがあっても、確実に冷媒の漏れを検出することができる。 Furthermore, according to the invention described in claim 2 , a plurality of plate-type heat exchangers used in the chilled water device, the hot water device or the steam generator are communicated in parallel every several sheets to form a group, Since the temperature of the refrigerant discharged to the atmosphere from the partition portion formed between the first joint line portion and the second joint line portion for each group is detected by one temperature detecting means, each plate type There is no need to provide separate pressure detection means in the heat exchanger, and it is possible to reliably detect refrigerant leakage even if refrigerant leakage occurs in any of the connected plate heat exchanger groups while keeping costs low. can do.

請求項に記載の発明は、2枚の金属板を接合して冷媒流路を形成する冷却部となるプレート型熱交換器を備えた冷水装置・温水装置又は蒸気発生装置であって、前記2枚の金属板に、冷媒流路を形成する第1接合線部と、前記第1接合線部の外側に前記第1接合線部を囲むように第2接合線部を設け、第1接合線部と第2接合線部との間に形成される区画部に、該区画部内への冷媒漏れを検出する冷媒漏れ検出手段を設け、前記冷媒漏れ検出手段は、前記区画部に設けられた前記区画部内に連通し大気に開放する開放状導管と、該開放状導管に設けられた冷媒センサとからなり、前記プレート型熱交換器は複数用意され、各プレート型熱交換器の冷媒流路が並列に接続され、また、前記各プレート型熱交換器の前記区画部内は前記開放状導管により相互に連通し、前記冷媒センサが前記開放状導管に設けられていることを特徴とする。 Invention of Claim 3 is a cold water apparatus, a hot water apparatus, or a steam generator provided with the plate type heat exchanger used as the cooling part which joins two metal plates and forms a refrigerant | coolant flow path, Comprising: Two metal plates are provided with a first joint line portion that forms a coolant channel, and a second joint line portion is provided outside the first joint line portion so as to surround the first joint line portion. Refrigerant leakage detection means for detecting refrigerant leakage into the partition portion is provided in the partition portion formed between the line portion and the second joint line portion, and the refrigerant leak detection means is provided in the partition portion. It comprises an open conduit that communicates with the compartment and opens to the atmosphere, and a refrigerant sensor provided in the open conduit, and a plurality of the plate type heat exchangers are prepared, and a refrigerant flow path of each plate type heat exchanger Are connected in parallel, and the inside of the partition portion of each plate heat exchanger is the open guide. The refrigerant sensors are provided in the open conduit in communication with each other by pipes .

請求項3に記載の発明によれば、冷媒流路を形成する第1接合部の剥離等により冷媒流路からの冷媒漏れがあったとき、第2接合線部が第1接合線部を囲むように設けてあるので、冷媒及び冷媒油の水側への漏出が防止できるのに加えて、第1接合線部と第2接合線部との間に形成される区画部内で冷媒の漏れを検出することができる。
また、請求項に記載の発明によれば、冷媒流路を形成する第1接合線部の剥離等により冷媒流路からの冷媒漏れがあったとき、前記区画内に漏れた冷媒が開放状導管を通って大気に放出される冷媒を開放状導管に設けた冷媒センサが検出するので、冷媒の漏れを検出することができる。
According to the third aspect of the present invention, when there is a refrigerant leak from the refrigerant flow path due to peeling of the first joint forming the refrigerant flow path, the second joint line surrounds the first joint line. In addition to preventing leakage of refrigerant and refrigerant oil to the water side, the refrigerant leaks in the partition formed between the first joint line part and the second joint line part. Can be detected.
Further, according to the invention of claim 3, when a refrigerant leak from the refrigerant flow path by peeling of the first joining line portion forming the refrigerant passage, the refrigerant that has leaked into the compartment is opened like Since the refrigerant sensor provided in the open conduit detects the refrigerant released to the atmosphere through the conduit, leakage of the coolant can be detected.

さらに、請求項に記載の発明によれば、冷水装置・温水装置又は蒸気発生装置に用いられる複数のプレート型熱交換器を幾つかの枚数ごとに並列に連通して群を構成し、それぞれの群ごとに第1接合線部と第2接合線部との間に形成される区画部から大気へ放出される冷媒を1つの冷媒センサで検出するようにしたので、各プレート型熱交換器に個別の冷媒センサを設ける必要はなく、コストを低く抑えながら、連接されているプレート型熱交換器群のいずれかに冷媒の漏れがあっても、確実に冷媒の漏れを検出することができる。 Furthermore, according to the invention described in claim 3 , a plurality of plate-type heat exchangers used in a chilled water device, a hot water device, or a steam generator are connected in parallel every several sheets to form a group, Each plate type heat exchanger is configured to detect the refrigerant discharged from the partition formed between the first joint line portion and the second joint line portion to the atmosphere for each group by one refrigerant sensor. There is no need to provide a separate refrigerant sensor, and it is possible to reliably detect a refrigerant leak even if there is a refrigerant leak in any of the connected plate-type heat exchanger groups while keeping costs low. .

本発明によれば、冷水装置・温水装置又は蒸気発生装置に備えた冷却部となるプレート型熱交換器は、2枚の金属板に、冷媒流路を形成する第1接合線部と、第1接合線部の外側に第1接合線部を囲むように第2接合線部を設け、第1接合線部と第2接合線部との間に形成される区画部に、該区画部内への冷媒漏れを検出する冷媒漏れ検出手段を設けることにより、冷媒流路を形成する第1接合線部の剥離等により冷媒流路からの冷媒漏れがあったとき、第2接合線部が第1接合線部を囲むように設けてあるので、冷媒及び冷媒油の水側への漏出が防止できるのに加えて、第1接合線部と第2接合線部との間に形成される区画部内で冷媒の漏れを検出することができるので、冷媒が熱交換される水中に漏れ出す前に冷媒漏れを確認でき、冷媒による水の汚染を有効に防止することができる。   According to the present invention, a plate-type heat exchanger serving as a cooling unit provided in a chilled water device, a hot water device, or a steam generator includes a first joining line portion that forms a refrigerant flow path in two metal plates, A second joint line portion is provided outside the first joint line portion so as to surround the first joint line portion, and the partition portion formed between the first joint line portion and the second joint line portion is inserted into the partition portion. By providing the refrigerant leak detecting means for detecting the refrigerant leak, the second joint line portion is the first when the refrigerant leaks from the refrigerant passage due to peeling of the first joint line portion forming the refrigerant passage. Since it is provided so as to surround the joint line part, in addition to preventing leakage of refrigerant and refrigerant oil to the water side, in the partition part formed between the first joint line part and the second joint line part The refrigerant leakage can be detected by the refrigerant, so that the refrigerant leakage can be confirmed before the refrigerant leaks into the water where heat is exchanged. According contamination of water can be effectively prevented.

本発明に係る冷水装置・温水装置又は蒸気発生装置の実施の形態の第1例を示す斜視図である。It is a perspective view which shows the 1st example of embodiment of the cold water apparatus / hot water apparatus which concerns on this invention, or a steam generator. 本例の要部概略正面図である。It is a principal part schematic front view of this example. 図2のA−A線断面図である。It is the sectional view on the AA line of FIG. 第2接合線部の他例を示す要部概略正面図である。It is a principal part schematic front view which shows the other examples of a 2nd joining line part. 図4のB−B線断面図である。It is the BB sectional view taken on the line of FIG. 本発明に係る冷水装置・温水装置又は蒸気発生装置の実施の形態の第2例を示す要部概略斜視図である。It is a principal part schematic perspective view which shows the 2nd example of embodiment of the cold water apparatus / hot water apparatus which concerns on this invention, or a steam generator. 本発明に係る冷水装置・温水装置又は蒸気発生装置の実施の形態の第3例を示す要部概略正面図である。It is a principal part schematic front view which shows the 3rd example of embodiment of the cold water apparatus / hot water apparatus which concerns on this invention, or a steam generator. 本発明に係る冷水装置・温水装置又は蒸気発生装置の実施の形態の第4例を示す要部概略斜視図である。It is a principal part schematic perspective view which shows the 4th example of embodiment of the cold water apparatus / hot water apparatus which concerns on this invention, or a steam generator. 本発明に係る冷水装置・温水装置又は蒸気発生装置の実施の形態の第5例を示す要部概略正面図である。It is a principal part schematic front view which shows the 5th example of embodiment of the cold water apparatus / hot water apparatus which concerns on this invention, or a steam generator. 本発明に係る冷水装置・温水装置又は蒸気発生装置の実施の形態の第6例を示す要部概略斜視図である。It is a principal part schematic perspective view which shows the 6th example of embodiment of the cold water apparatus / hot water apparatus which concerns on this invention, or a steam generator.

以下、本発明に係る冷水装置・温水装置又は蒸気発生装置を実施するための形態を、図面に示す実施例を参照して詳細に説明する。
図1は本発明に係る冷水装置・温水装置又は蒸気発生装置の実施の形態の第1例を示す斜視図、図2は本例の要部概略正面図、図3は図2のA−A線断面図、図4は第2接合線部の他例を示す要部概略正面図、図5は図4のB−B線断面図である。
EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the cold water apparatus, warm water apparatus, or steam generator which concerns on this invention is demonstrated in detail with reference to the Example shown on drawing.
FIG. 1 is a perspective view showing a first example of an embodiment of a cold water apparatus / hot water apparatus or a steam generator according to the present invention, FIG. 2 is a schematic front view of the main part of this example, and FIG. FIG. 4 is a schematic sectional front view showing another example of the second joining line portion, and FIG. 5 is a sectional view taken along line BB in FIG.

本例は、本発明が冷水装置である場合の実施例であり、本例の冷水装置1は、貯水タンク2と、貯水タンク2内に設けた冷却部3となるプレート型熱交換器4と、プレート型熱交換器4へ冷媒を供給する冷凍機5とを備えている。プレート型熱交換器4と冷凍機5とは、冷媒循環路6で接続され、冷媒循環路6の吸引路6aには膨張弁7と液電磁弁8が設けられている。貯水タンク2には、貯水タンク2内へ給水する給水路9と、貯水タンク2内でプレート型熱交換器4で熱交換して冷却された冷水を負荷側へ送水する送水路10が接続され、給水路9には給水弁11が設けられ、送水路10には送水ポンプ12が設けられている。さらに、貯水タンク2には、外部に水位制御筒13が設けられており、貯水タンク2内の水位を検出し、所定量以下に下がると給水弁11に開弁指令を出して給水させるようになっている。また、貯水タンク2の底部には、排水路30が接続され、排水路30には排水弁31が設けられている。   This example is an embodiment in the case where the present invention is a chilled water device, and the chilled water device 1 of the present example includes a water storage tank 2 and a plate heat exchanger 4 serving as a cooling unit 3 provided in the water storage tank 2. And a refrigerator 5 for supplying a refrigerant to the plate heat exchanger 4. The plate heat exchanger 4 and the refrigerator 5 are connected by a refrigerant circulation path 6, and an expansion valve 7 and a liquid electromagnetic valve 8 are provided in the suction path 6 a of the refrigerant circulation path 6. Connected to the water storage tank 2 are a water supply path 9 for supplying water into the water storage tank 2 and a water supply path 10 for supplying cold water cooled by heat exchange in the water storage tank 2 by the plate heat exchanger 4 to the load side. The water supply passage 9 is provided with a water supply valve 11, and the water supply passage 10 is provided with a water supply pump 12. Further, the water storage tank 2 is provided with a water level control cylinder 13 on the outside so that the water level in the water storage tank 2 is detected, and when the water level falls below a predetermined amount, an opening command is issued to the water supply valve 11 to supply water. It has become. A drainage channel 30 is connected to the bottom of the water storage tank 2, and a drainage valve 31 is provided in the drainage channel 30.

前記プレート型熱交換器4にあっては、2枚の金属板14,15に、冷媒流路16を形成する第1接合線部17と、第1接合線部17の外側に第1接合線部17を囲むように第2接合線部18を設け、第1接合線部17と第2接合線部18との間に区画部19を形成し、区画部19に、区画部19内への冷媒漏れを検出する冷媒漏れ検出手段20を設けた構成となっている。   In the plate heat exchanger 4, a first joint line 17 that forms the refrigerant flow path 16 is formed between the two metal plates 14 and 15, and a first joint line is formed outside the first joint line 17. A second joint line portion 18 is provided so as to surround the portion 17, a partition portion 19 is formed between the first joint line portion 17 and the second joint line portion 18, and the partition portion 19 is connected to the partition portion 19. The refrigerant leak detecting means 20 for detecting the refrigerant leak is provided.

さらに詳細に説明すると、前記2枚の金属板14,15に設けられる第1接合線部17は溶接により設けられており、第1接合線部17で囲まれた部分を膨管して冷媒流路16が形成されている。冷媒流路17の一方の端部には冷媒流入管21が、他方の端部には冷媒流出管22が設けられ、冷媒流入管21が冷媒循環路6の吐出路6bと接続し、冷媒流出管22が冷媒循環路6の吸引路6aと接続する。   More specifically, the first joint line portion 17 provided on the two metal plates 14 and 15 is provided by welding, and a portion surrounded by the first joint line portion 17 is expanded to flow the refrigerant. A path 16 is formed. A refrigerant inflow pipe 21 is provided at one end of the refrigerant flow path 17, and a refrigerant outflow pipe 22 is provided at the other end. The refrigerant inflow pipe 21 is connected to the discharge path 6 b of the refrigerant circulation path 6, and the refrigerant outflow The pipe 22 is connected to the suction path 6 a of the refrigerant circulation path 6.

さらに、第1接合線部17の外側に第1接合線部17を囲むように設けた第2接合線部18は溶接により設けられており、区画部19を気密状態に形成している。
本例では、図2,図3に示すように、第2接合線部18は重ね合わせた2枚の金属板14,15の周辺に設けられているが、必ずしも金属板14,15の周辺である必要はない。第2接合線部18は図4,図5に示すように、第1接合線部17の周囲を囲むように設けられていてもよい。
しかし、冷水装置1が冷水型として使用される場合は、第2接合線部18は図4,図5に示すように、第1接合線部17の周囲を囲むように設けられていてもよいが、冷水装置1が蓄氷型として使用される場合は、第2接合線部18は、図2,図3に示すように、第2接合線部18は重ね合わせた2枚の金属板14,15の周辺に設けられていることを要する。
また、第2接合線部18の接合手段は溶接に限らず、図示しないが、ゴムパッキンであってもよい。第2接合線部18がゴムパッキンである場合は、金属板14,15の間にゴムパッキンを挟み込み、金属板14,15をボルト等で締め付けて、区画部19を気密に保持するようにしておく。
第1接合線部17は、冷媒流路16内への冷媒の供給と停止に伴う圧力変化によって生じる応力に対応する金属板14,15の強度よりも低い溶接強度にすることにより、冷媒を水側へ漏出させることなく、確実に冷媒漏れ検出手段20に導いて検出させることができる。
Furthermore, the 2nd joining line part 18 provided so that the 1st joining line part 17 may be enclosed on the outer side of the 1st joining line part 17 is provided by welding, and the division part 19 is formed in the airtight state.
In this example, as shown in FIGS. 2 and 3, the second joint line portion 18 is provided around the two metal plates 14 and 15 that are overlapped, but is not necessarily around the metal plates 14 and 15. There is no need. As shown in FIGS. 4 and 5, the second joint line portion 18 may be provided so as to surround the first joint line portion 17.
However, when the cold water apparatus 1 is used as a cold water type, the second joint line portion 18 may be provided so as to surround the first joint line portion 17 as shown in FIGS. However, when the chilled water device 1 is used as an ice storage type, the second joining line portion 18 has two metal plates 14 overlapped with each other as shown in FIGS. , 15 is required to be provided around the periphery.
Further, the joining means of the second joining line portion 18 is not limited to welding, but may be a rubber packing (not shown). When the second joining line portion 18 is a rubber packing, the rubber packing is sandwiched between the metal plates 14 and 15 and the metal plates 14 and 15 are tightened with bolts or the like so that the partition portion 19 is kept airtight. deep.
The first joint line 17 has a welding strength lower than the strength of the metal plates 14 and 15 corresponding to the stress caused by the pressure change accompanying the supply and stop of the coolant into the coolant channel 16, thereby Without being leaked to the side, it can be reliably guided to the refrigerant leak detection means 20 for detection.

区画部19内への冷媒漏れを検出する冷媒漏れ検出手段20にあっては、本例では、区画部19に設けられた区画部19内に連通する圧力検出用導管23と、圧力検出用導管23に設けられ区画部19内の圧力を検出する圧力検出手段24とからなっている。圧力検出手段24としては、圧力センサや圧力スイッチなどが用いられる。   In the refrigerant leakage detection means 20 for detecting refrigerant leakage into the partition part 19, in this example, a pressure detection conduit 23 communicating with the partition part 19 provided in the partition part 19, and a pressure detection conduit. And a pressure detecting means 24 for detecting the pressure in the partition part 19. As the pressure detection means 24, a pressure sensor, a pressure switch, or the like is used.

なお、本例の冷水装置1は、給水路9から貯水タンク2内へ給水し、貯水タンク2内でプレート型熱交換器4で熱交換して冷却された冷水を送水路10から負荷側へ送水して使用し、そのまま排水するタイプであるが、循環路(図示せず。)を接続し、負荷側へ供給して使用した水を循環路から貯水タンク2内へ戻して、再び冷却して冷水として負荷側へ供給する循環タイプであってもよい。   The chilled water device 1 of this example supplies water from the water supply channel 9 into the water storage tank 2, and cool water cooled by exchanging heat in the water storage tank 2 by the plate heat exchanger 4 from the water supply channel 10 to the load side. It is a type that feeds water and drains it as it is, but it connects to a circulation path (not shown), supplies water to the load side, returns the used water from the circulation path to the water storage tank 2, and cools it again. It is also possible to use a circulating type that supplies cold water to the load side.

このように構成された本例の冷水装置1が蓄氷型である場合は、次のような運転となる。
蓄氷型の冷水装置1の運転は、貯水タンク2内に水を貯める給水工程と、氷を生成して蓄熱する蓄氷工程と、生成した氷を融解させて冷水を取り出す冷水取出工程とに分けられる。
[給水工程]
貯水タンク2に水を貯める。貯水タンク2内の水位が所定水位にない場合、給水弁11を開いて所定水位まで給水を行う。水位制御筒13が適正水位を検出したら給水弁11を閉じて給水工程が終了する。
[蓄氷工程]
給水工程が終了したら、冷媒循環路6の吐出路6aに設けた液電磁弁8を開き、冷凍機5で圧縮された冷媒を膨張弁7で膨張させてプレート型熱交換器4の冷媒流路16へ冷媒を流してプレート型熱交換器4の表面に凍りを生成させ、プレート型熱交換器4の表面に凍りが成長したら冷凍機5を停止して蓄氷工程が終了する。
[冷水取出工程]
給水弁11を開いて貯水タンク2内に常温水を供給し、蓄氷工程で生成した氷を融解させて冷水を送水ポンプ12によって送水路10から負荷へ供給する。
この冷水取出工程では、プレート型熱交換器4の表面に凍りが成長した後も冷凍機5の運転を続け、給水弁11を開いて貯水タンク2内に常温水を供給し、蓄氷工程で生成した氷を融解させるとともに、プレート型熱交換器4の表面を流れる水とプレート型熱交換器4内を流れる冷媒と熱交換しながら冷水を製造し、負荷へ供給することも行われる。
When the chilled water device 1 of this example configured as described above is an ice storage type, the following operation is performed.
The operation of the ice storage type chilled water device 1 includes a water supply process for storing water in the water storage tank 2, an ice storage process for generating and storing ice, and a cold water extraction process for melting the generated ice and taking out the cold water. Divided.
[Water supply process]
Water is stored in the water storage tank 2. When the water level in the water storage tank 2 is not at the predetermined water level, the water supply valve 11 is opened to supply water to the predetermined water level. When the water level control cylinder 13 detects an appropriate water level, the water supply valve 11 is closed and the water supply process is completed.
[Ice storage process]
When the water supply process is completed, the liquid electromagnetic valve 8 provided in the discharge path 6a of the refrigerant circulation path 6 is opened, the refrigerant compressed by the refrigerator 5 is expanded by the expansion valve 7, and the refrigerant flow path of the plate heat exchanger 4 is expanded. The refrigerant is supplied to 16 to generate freezing on the surface of the plate heat exchanger 4, and when the freezing grows on the surface of the plate heat exchanger 4, the refrigerator 5 is stopped and the ice storage process is completed.
[Cold water extraction process]
The water supply valve 11 is opened, normal temperature water is supplied into the water storage tank 2, the ice generated in the ice storage process is melted, and cold water is supplied from the water supply path 10 to the load by the water supply pump 12.
In this cold water extraction process, the refrigerator 5 continues to operate even after freezing grows on the surface of the plate heat exchanger 4, and the water supply valve 11 is opened to supply room temperature water into the water storage tank 2, and in the ice storage process. While the generated ice is melted, cold water is produced while exchanging heat between the water flowing on the surface of the plate heat exchanger 4 and the refrigerant flowing in the plate heat exchanger 4, and supplied to the load.

また、本例の冷水装置1が冷水型である場合は、次のような運転となる。
蓄氷型の冷水装置1の運転は、貯水タンク2内に水を貯める給水工程と、水を冷却する冷却工程と、冷却した冷水を取り出す冷水取出工程とに分けられる。
[給水工程]
貯水タンク2に水を貯める。貯水タンク2内の水位が所定水位にない場合、給水弁11を開いて所定水位まで給水を行う。水位制御筒13が適正水位を検出したら給水弁11を閉じて給水工程が終了する。
[冷却工程]
給水工程が終了したら、冷媒循環路6の吐出路6aに設けた液電磁弁8を開き、冷凍機5で圧縮された冷媒を膨張弁7で膨張させてプレート型熱交換器4の冷媒流路16へ冷媒を流し、貯水タンク2内の水を所定温度まで冷却する。貯水タンク2内の水を所定温度まで冷却したら冷凍機5を停止して冷却工程が終了する。
[冷水取出工程]
冷却工程で冷却した冷水を送水ポンプ12によって送水路10から負荷へ供給する。
Moreover, when the cold water apparatus 1 of this example is a cold water type, it becomes the following operation | movement.
The operation of the ice storage type cold water apparatus 1 is divided into a water supply process for storing water in the water storage tank 2, a cooling process for cooling the water, and a cold water extraction process for taking out the cooled cold water.
[Water supply process]
Water is stored in the water storage tank 2. When the water level in the water storage tank 2 is not at the predetermined water level, the water supply valve 11 is opened to supply water to the predetermined water level. When the water level control cylinder 13 detects an appropriate water level, the water supply valve 11 is closed and the water supply process is completed.
[Cooling process]
When the water supply process is completed, the liquid electromagnetic valve 8 provided in the discharge path 6a of the refrigerant circulation path 6 is opened, the refrigerant compressed by the refrigerator 5 is expanded by the expansion valve 7, and the refrigerant flow path of the plate heat exchanger 4 is expanded. The refrigerant is flowed to 16 to cool the water in the water storage tank 2 to a predetermined temperature. When the water in the water storage tank 2 is cooled to a predetermined temperature, the refrigerator 5 is stopped and the cooling process is completed.
[Cold water extraction process]
The cold water cooled in the cooling process is supplied from the water supply path 10 to the load by the water supply pump 12.

以上のように運転される本例の冷水装置1によれば、貯水タンク2内に設けた冷却部3となるプレート型熱交換器4において、冷媒流路16を形成する第1接合部17に剥離等の破損があったとき、第1接合線部17と第2接合線部18との間に形成される区画部19内へ冷媒が漏れ、気密状態にある区画部19内の圧力が冷媒圧力と等しくなろうとして上昇する。この圧力の上昇を圧力検出用導管23に設けられている圧力検出手段24により検出することにより、冷媒の漏れを検出することができる。   According to the chilled water device 1 of this example operated as described above, in the plate-type heat exchanger 4 serving as the cooling unit 3 provided in the water storage tank 2, the first joint 17 that forms the refrigerant flow path 16 is provided. When there is damage such as peeling, the refrigerant leaks into the compartment 19 formed between the first joint line 17 and the second joint line 18, and the pressure in the compartment 19 in the airtight state is reduced to the refrigerant. Ascends to equal pressure. By detecting this increase in pressure by the pressure detection means 24 provided in the pressure detection conduit 23, the leakage of the refrigerant can be detected.

図6は本発明に係る冷水装置・温水装置又は蒸気発生装置図の実施の形態の第2例を示す要部概略斜視図である。
本例は、第1例と同様に、本発明が冷水装置である場合の実施例であり、本例の冷水装置は、要部となる冷却部3の構成以外は第1例と同様なので、要部のみを図示し、他は第1例を援用し図示は省略する。
本例の冷水装置は、特に冷水の使用量が多い場合に対応できる装置であり、複数のプレート型熱交換器4で冷却部3を構成している。
本例では、第1例の冷水装置1のプレート型熱交換器4が複数備えられ、複数のプレート型熱交換器4は、冷媒配管25によって並列に接続されている。そして、各プレート型熱交換器4に設けた圧力検出用導管23も相互に連通するように連通管26により接続され、この連通管26には圧力検出手段24が設けられている。
FIG. 6: is a principal part schematic perspective view which shows the 2nd example of embodiment of the cold water apparatus / hot water apparatus which concerns on this invention, or a steam generator figure.
This example, like the first example, is an example when the present invention is a chilled water device, and the chilled water device of the present example is the same as the first example except for the configuration of the cooling unit 3 as a main part. Only the main part is shown, and the others are used and the illustration is omitted.
The chilled water device of this example is a device that can cope with a particularly large amount of chilled water used, and the cooling unit 3 is constituted by a plurality of plate heat exchangers 4.
In this example, a plurality of plate type heat exchangers 4 of the chilled water device 1 of the first example are provided, and the plurality of plate type heat exchangers 4 are connected in parallel by a refrigerant pipe 25. The pressure detection conduits 23 provided in each plate heat exchanger 4 are also connected by a communication pipe 26 so as to communicate with each other, and a pressure detection means 24 is provided in the communication pipe 26.

このように構成された本例の冷水装置によれば、貯水タンク2内に設けた冷却部3となる複数のプレート型熱交換器4において、いずれかの冷媒流路16を形成する第1接合部17に剥離等による破損があったとき、第1接合線部17と第2接合線部18との間に形成される区画部19内へ冷媒が漏れ、漏れた冷媒が圧力検出用導管23から連通管26に導かれ、気密状態にある連通管26の圧力が冷媒圧力と等しくなろうとして上昇する。この圧力の上昇を連通管26に設けられている圧力検出手段24により検出することにより、冷媒の漏れを検出することができる。
このように、複数のプレート型熱交換器4を1群としていずれかのプレート型熱交換器4に冷媒の漏れがあっても1つの圧力検出手段24で確実に検出することができる。
また、図示しないが、必要に応じて、複数のプレート型熱交換器4を1群として、これを複数群として備えるようにしてもよい。この場合は、群ごとに1つの圧力検出手段24が必要となる。
According to the chilled water device of this example configured as described above, in the plurality of plate heat exchangers 4 serving as the cooling unit 3 provided in the water storage tank 2, the first joint that forms any one of the refrigerant flow paths 16. When the part 17 is damaged due to peeling or the like, the refrigerant leaks into the partition part 19 formed between the first joint line part 17 and the second joint line part 18, and the leaked refrigerant flows into the pressure detection conduit 23. To the communication pipe 26, and the pressure of the communication pipe 26 in an airtight state rises to make it equal to the refrigerant pressure. By detecting the increase in pressure by the pressure detection means 24 provided in the communication pipe 26, it is possible to detect the leakage of the refrigerant.
Thus, even if there is a refrigerant leak in any one of the plate heat exchangers 4 as a group of the plurality of plate heat exchangers 4, it can be reliably detected by one pressure detection means 24.
Moreover, although not shown in figure, as needed, you may make it provide several plate type heat exchanger 4 as 1 group, and this as multiple groups. In this case, one pressure detection means 24 is required for each group.

図7は本発明に係る冷水装置・温水装置又は蒸気発生装置の実施の形態の第3例を示す要部概略斜視図である。
本例は、第1例と同様に、本発明が冷水装置である場合の実施例であり、本例の冷水装置は、要部となる冷却部3の構成以外は第1例と同様なので、要部のみを図示し、他は第1例を援用し図示は省略する。
本例の冷水装置は、貯水タンク2内に設けた冷却部3となるプレート型熱交換器4における区画部19内への冷媒漏れを検出する冷媒漏れ検出手段20が、区画部19に設けられた区画部19内に連通し大気に開放する開放状導管27と、開放状導管27に設けられた温度検出手段28とから構成されている。温度検出手段28としては、熱電対やサーミスタといった温度センサや液膨式サーモスタットなどが用いられる。
その他は第1例と同様と同様であり、第1例と同様の説明を援用する。
FIG. 7 is a main part schematic perspective view showing a third example of the embodiment of the cold water apparatus / hot water apparatus or the steam generator according to the present invention.
This example, like the first example, is an example when the present invention is a chilled water device, and the chilled water device of the present example is the same as the first example except for the configuration of the cooling unit 3 as a main part. Only the main part is shown, and the others are used and the illustration is omitted.
In the chilled water device of this example, a refrigerant leak detecting means 20 for detecting refrigerant leakage into the partition part 19 in the plate heat exchanger 4 serving as the cooling part 3 provided in the water storage tank 2 is provided in the partition part 19. The open conduit 27 communicates with the inside of the partition portion 19 and is opened to the atmosphere, and the temperature detecting means 28 provided in the open conduit 27. As the temperature detection means 28, a temperature sensor such as a thermocouple or a thermistor, a liquid expansion thermostat, or the like is used.
Others are the same as in the first example, and the same description as in the first example is used.

このように構成された本例の冷水装置によれば、貯水タンク2内に設けた冷却部3となるプレート型熱交換器4において、冷媒流路16を形成する第1接合部17に剥離等による破損があったとき、第1接合線部17と第2接合線部18との間に形成される区画部19内へ冷媒が漏れ、区画部19内に連通し開放状導管27を通って大気に放出される。このとき、開放状導管27に設けられている温度検出手段28が開放状導管27を通って大気に放出される際の冷媒の温度を検出することにより、冷媒の漏れを検出することができる。   According to the chilled water device of the present example configured as described above, in the plate heat exchanger 4 serving as the cooling unit 3 provided in the water storage tank 2, the first joint 17 that forms the refrigerant flow path 16 is peeled off or the like. When there is damage due to the refrigerant, the refrigerant leaks into the compartment 19 formed between the first joint line portion 17 and the second joint line portion 18, and communicates with the compartment portion 19 through the open conduit 27. Released into the atmosphere. At this time, the leakage of the refrigerant can be detected by detecting the temperature of the refrigerant when the temperature detecting means 28 provided in the open conduit 27 is discharged to the atmosphere through the open conduit 27.

図8は本発明に係る冷水装置・温水装置又は蒸気発生装置の実施の形態の第4例を示す要部概略斜視図である。
本例は、第1例と同様に、本発明が冷水装置である場合の実施例であり、本例の冷水装置は、要部となる冷却部3の構成以外は第1例と同様なので、要部のみを図示し、他は第1例を援用し図示は省略する。
本例の冷水装置は、第2例と同様に、特に冷水の使用量が多い場合に対応できる装置であり、複数のプレート型熱交換器4で冷却部3を構成している。
本例では、第3例の冷水装置のプレート型熱交換器4が複数備えられ、複数のプレート型熱交換器4は、冷媒配管25によって並列に接続されている。そして、各プレート型熱交換器4に設けた開放状導管27も相互に連通するように接続され、この開放状導管27には温度検出手段28が設けられている。
FIG. 8 is a main part schematic perspective view showing a fourth example of the embodiment of the cold water device / hot water device or the steam generator according to the present invention.
This example, like the first example, is an example when the present invention is a chilled water device, and the chilled water device of the present example is the same as the first example except for the configuration of the cooling unit 3 as a main part. Only the main part is shown, and the others are used and the illustration is omitted.
Similar to the second example, the cold water device of this example is a device that can cope with a particularly large amount of cold water used, and the cooling unit 3 is constituted by a plurality of plate-type heat exchangers 4.
In this example, a plurality of plate type heat exchangers 4 of the chilled water device of the third example are provided, and the plurality of plate type heat exchangers 4 are connected in parallel by a refrigerant pipe 25. The open conduits 27 provided in the plate heat exchangers 4 are also connected to communicate with each other, and the open conduits 27 are provided with temperature detecting means 28.

このように構成された本例の冷水装置によれば、貯水タンク2内に設けた冷却部3となる複数のプレート型熱交換器4において、いずれかの冷媒流路16を形成する第1接合部17に剥離等による破損があったとき、第1接合線部17と第2接合線部18との間に形成される区画部19内へ冷媒が漏れ、区画部19内に連通し開放状導管27を通って大気に放出される。このとき、開放状導管27に設けられている温度検出手段28が開放状導管27を通って大気に放出される際の冷媒の温度を検出することにより、冷媒の漏れを検出することができる。
このように、複数のプレート型熱交換器4を1群としていずれかのプレート型熱交換器4に冷媒の漏れがあっても1つの温度検出手段28で確実に検出することができる。
また、図示しないが、必要に応じて、複数のプレート型熱交換器4を1群として、これを複数群として備えるようにしてもよい。この場合は、群ごとに1つの温度検出手段28が必要となる。
According to the chilled water device of this example configured as described above, in the plurality of plate heat exchangers 4 serving as the cooling unit 3 provided in the water storage tank 2, the first joint that forms any one of the refrigerant flow paths 16. When the part 17 is damaged due to peeling or the like, the refrigerant leaks into the partition part 19 formed between the first joint line part 17 and the second joint line part 18 and communicates into the partition part 19 to be open. It is released into the atmosphere through a conduit 27. At this time, the leakage of the refrigerant can be detected by detecting the temperature of the refrigerant when the temperature detecting means 28 provided in the open conduit 27 is discharged to the atmosphere through the open conduit 27.
Thus, even if there is a refrigerant leak in any one of the plate type heat exchangers 4 as a group of the plurality of plate type heat exchangers 4, it can be reliably detected by one temperature detecting means 28.
Moreover, although not shown in figure, as needed, you may make it provide several plate type heat exchanger 4 as 1 group, and this as multiple groups. In this case, one temperature detection means 28 is required for each group.

図9は本発明に係る冷水装置・温水装置又は蒸気発生装置の実施の形態の第5例を示す要部概略斜視図である。
本例は、第1例と同様に、本発明が冷水装置である場合の実施例であり、本例の冷水装置は、要部となる冷却部3の構成以外は第1例と同様なので、要部のみを図示し、他は第1例を援用し図示は省略する。
本例の冷水装置は、貯水タンク2内に設けた冷却部3となるプレート型熱交換器4における区画部19内への冷媒漏れを検出する冷媒漏れ検出手段20が、区画部19に設けられた区画部19内に連通し大気に開放する開放状導管27と、開放状導管27に設けられた冷媒センサ29とから構成されている。
その他は第1例と同様と同様であり、第1例と同様の説明を援用する。
FIG. 9 is a main part schematic perspective view showing a fifth example of the embodiment of the cold water device / hot water device or the steam generator according to the present invention.
This example, like the first example, is an example when the present invention is a chilled water device, and the chilled water device of the present example is the same as the first example except for the configuration of the cooling unit 3 as a main part. Only the main part is shown, and the others are used and the illustration is omitted.
In the chilled water device of this example, a refrigerant leak detecting means 20 for detecting refrigerant leakage into the partition part 19 in the plate heat exchanger 4 serving as the cooling part 3 provided in the water storage tank 2 is provided in the partition part 19. And an open conduit 27 communicating with the inside of the partition portion 19 and opened to the atmosphere, and a refrigerant sensor 29 provided in the open conduit 27.
Others are the same as in the first example, and the same description as in the first example is used.

このように構成された本例の冷水装置によれば、貯水タンク2内に設けた冷却部3となるプレート型熱交換器4において、冷媒流路16を形成する第1接合部17に剥離等による破損があったとき、第1接合線部17と第2接合線部18との間に形成される区画部19内へ冷媒が漏れ、区画部19内に連通し開放状導管27を通って大気に放出される。このとき、開放状導管27に設けられている冷媒センサ29が開放状導管27を通って大気に放出される冷媒を検出することにより、冷媒の漏れを検出することができる。   According to the chilled water device of the present example configured as described above, in the plate heat exchanger 4 serving as the cooling unit 3 provided in the water storage tank 2, the first joint 17 that forms the refrigerant flow path 16 is peeled off or the like. When there is damage due to the refrigerant, the refrigerant leaks into the compartment 19 formed between the first joint line portion 17 and the second joint line portion 18, and communicates with the compartment portion 19 through the open conduit 27. Released into the atmosphere. At this time, the refrigerant sensor 29 provided in the open conduit 27 detects the refrigerant released to the atmosphere through the open conduit 27, whereby the leakage of the refrigerant can be detected.

図10は本発明に係る冷水装置・温水装置又は蒸気発生装置の実施の形態の第6例を示す要部概略斜視図である。
本例は、第1例と同様に、本発明が冷水装置である場合の実施例であり、本例の冷水装置は、要部となる冷却部3の構成以外は第1例と同様なので、要部のみを図示し、他は第1例を援用し図示は省略する。
本例の冷水装置は、第2例と同様に、特に冷水の使用量が多い場合に対応できる装置であり、複数のプレート型熱交換器4で冷却部3を構成している。
本例では、第3例の冷水装置のプレート型熱交換器4が複数備えられ、複数のプレート型熱交換器4は、冷媒配管25によって並列に接続されている。そして、各プレート型熱交換器4に設けた開放状導管27も相互に連通するように接続され、この開放状導管27には冷媒センサ29が設けられている。
FIG. 10 is a main part schematic perspective view showing a sixth example of the embodiment of the cold water apparatus / hot water apparatus or the steam generator according to the present invention.
This example, like the first example, is an example when the present invention is a chilled water device, and the chilled water device of the present example is the same as the first example except for the configuration of the cooling unit 3 as a main part. Only the main part is shown, and the others are used and the illustration is omitted.
Similar to the second example, the cold water device of this example is a device that can cope with a particularly large amount of cold water used, and the cooling unit 3 is constituted by a plurality of plate-type heat exchangers 4.
In this example, a plurality of plate type heat exchangers 4 of the chilled water device of the third example are provided, and the plurality of plate type heat exchangers 4 are connected in parallel by a refrigerant pipe 25. An open conduit 27 provided in each plate type heat exchanger 4 is also connected so as to communicate with each other, and a refrigerant sensor 29 is provided in the open conduit 27.

このように構成された本例の冷水装置によれば、貯水タンク2内に設けた冷却部3となる複数のプレート型熱交換器4において、いずれかの冷媒流路16を形成する第1接合部17に剥離等による破損があったとき、第1接合線部17と第2接合線部18との間に形成される区画部19内へ冷媒が漏れ、区画部19内に連通し開放状導管27を通って大気に放出される。このとき、開放状導管27に設けられている冷媒センサ29が開放状導管27を通って大気に放出される冷媒を検出することにより、冷媒の漏れを検出することができる。
このように、複数のプレート型熱交換器4を1群としていずれかのプレート型熱交換器4に冷媒の漏れがあっても1つの冷媒センサ29で確実に検出することができる。
また、図示しないが、必要に応じて、複数のプレート型熱交換器4を1群として、これを複数群として備えるようにしてもよい。この場合は、群ごとに1つの冷媒センサ29が必要となる。
According to the chilled water device of this example configured as described above, in the plurality of plate heat exchangers 4 serving as the cooling unit 3 provided in the water storage tank 2, the first joint that forms any one of the refrigerant flow paths 16. When the part 17 is damaged due to peeling or the like, the refrigerant leaks into the partition part 19 formed between the first joint line part 17 and the second joint line part 18 and communicates into the partition part 19 to be open. It is released into the atmosphere through a conduit 27. At this time, the refrigerant sensor 29 provided in the open conduit 27 detects the refrigerant released to the atmosphere through the open conduit 27, whereby the leakage of the refrigerant can be detected.
Thus, even if there is a refrigerant leak in any one of the plate-type heat exchangers 4 with a plurality of plate-type heat exchangers 4 as a group, the single refrigerant sensor 29 can reliably detect the leakage.
Moreover, although not shown in figure, as needed, you may make it provide several plate type heat exchanger 4 as 1 group, and this as multiple groups. In this case, one refrigerant sensor 29 is required for each group.

なお、第1例乃至第6例はいずれも本発明が冷水装置である場合の実施例を示したが、本発明が温水装置又は蒸気発生装置である場合も、第1例乃至第6例と同様に構成したプレート型熱交換器を備えており、温水装置又は蒸気発生装置の運転中、プレート型熱交換器にあって、冷媒流路を形成する第1接合部に剥離等の破損があったとき、第1例乃至第6例と同様にして冷媒の漏れを検出することができる。   In addition, although the 1st example thru | or the 6th example showed the Example in case all this invention is a cold water apparatus, even when this invention is a hot water apparatus or a steam generator, it is the 1st example thru | or a 6th example. A plate-type heat exchanger having the same configuration is provided. During operation of the hot water device or the steam generator, the plate-type heat exchanger has a damage such as peeling at the first joint forming the refrigerant flow path. Then, the refrigerant leakage can be detected in the same manner as in the first to sixth examples.

1 冷水装置
2 貯水タンク
3 冷却部
4 プレート型熱交換器
5 冷凍機
6 冷媒循環路
6a 吸引路
6b 吐出路
7 膨張弁
8 液電磁弁
9 給水路
10 送水路
11 給水弁
12 送水ポンプ
13 水位制御筒
14,15 金属板
16 冷媒流路
17 第1接合線部
18 第2接合線部
19 区画部
20 冷媒漏れ検出手段
21 冷媒流入管
22 冷媒流出管
23 圧力検出用導管
24 圧力検出手段
25 冷媒配管
26 連通管
27 開放状導管
28 温度検出手段
29 冷媒センサ
30 排水路
31 排水弁
DESCRIPTION OF SYMBOLS 1 Cold water apparatus 2 Water storage tank 3 Cooling part 4 Plate type heat exchanger 5 Refrigerator 6 Refrigerant circulation path 6a Suction path 6b Discharge path 7 Expansion valve 8 Liquid electromagnetic valve 9 Water supply path 10 Water supply path 11 Water supply valve 12 Water supply pump 13 Water level control Tubes 14 and 15 Metal plate 16 Refrigerant flow path 17 First joint line 18 Second joint line 19 Partition 20 Refrigerant leak detection means 21 Refrigerant inflow pipe 22 Refrigerant outflow pipe 23 Pressure detection conduit 24 Pressure detection means 25 Refrigerant piping 26 Communication pipe 27 Open conduit 28 Temperature detection means 29 Refrigerant sensor 30 Drainage path 31 Drainage valve

Claims (3)

2枚の金属板を接合して冷媒流路を形成する冷却部となるプレート型熱交換器を備えた冷水装置・温水装置又は蒸気発生装置であって、前記2枚の金属板に、冷媒流路を形成する第1接合線部と、前記第1接合線部の外側に前記第1接合線部を囲むように第2接合線部を設け、第1接合線部と第2接合線部との間に形成される区画部に、該区画部内への冷媒漏れを検出する冷媒漏れ検出手段を設け
前記区画部は気密に形成され、前記冷媒漏れ検出手段は、前記区画部に設けられた前記区画部内に連通する圧力検出用導管と、該圧力検出用導管に設けられ前記区画部内の圧力を測定する圧力検出手段とからなり、
前記プレート型熱交換器は複数用意され、各プレート型熱交換器の冷媒流路が並列に接続され、また、前記各プレート型熱交換器の前記区画部内は前記圧力検出用導管により相互に連通するように連通管が設けられ、前記区画部内の圧力を測定する前記圧力検出手段が前記連通管に設けられていることを特徴とする冷水装置・温水装置又は蒸気発生装置。
A chilled water device, a hot water device or a steam generator provided with a plate-type heat exchanger serving as a cooling unit that joins two metal plates to form a refrigerant flow path. A first joint line portion that forms a path; a second joint line portion that surrounds the first joint line portion outside the first joint line portion; and a first joint line portion and a second joint line portion, the partition portion formed between the provided refrigerant leakage detecting means for detecting the refrigerant leakage to the compartment portion,
The partition portion is formed in an airtight manner, and the refrigerant leak detection means measures a pressure detection conduit communicating with the partition portion provided in the partition portion and a pressure in the partition portion provided in the pressure detection conduit. Pressure detecting means
A plurality of plate type heat exchangers are prepared, the refrigerant flow paths of the plate type heat exchangers are connected in parallel, and the inside of the partition portion of each plate type heat exchanger communicates with each other by the pressure detection conduit. A chilled water device / hot water device or a steam generator, characterized in that a communicating pipe is provided, and the pressure detecting means for measuring the pressure in the partition is provided in the communicating pipe .
2枚の金属板を接合して冷媒流路を形成する冷却部となるプレート型熱交換器を備えた冷水装置・温水装置又は蒸気発生装置であって、前記2枚の金属板に、冷媒流路を形成する第1接合線部と、前記第1接合線部の外側に前記第1接合線部を囲むように第2接合線部を設け、第1接合線部と第2接合線部との間に形成される区画部に、該区画部内への冷媒漏れを検出する冷媒漏れ検出手段を設け、
前記冷媒漏れ検出手段は、前記区画部に設けられた前記区画部内に連通し大気に開放する開放状導管と、該開放状導管に設けられた温度検出手段とからなり、
前記プレート型熱交換器は複数用意され、各プレート型熱交換器の冷媒流路が並列に接続され、また、前記各プレート型熱交換器の前記区画部内は前記開放状導管により相互に連通し、前記温度検出手段が前記開放状導管に設けられていることを特徴とする冷水装置・温水装置又は蒸気発生装置。
A chilled water device, a hot water device or a steam generator provided with a plate-type heat exchanger serving as a cooling unit that joins two metal plates to form a refrigerant flow path. A first joint line portion that forms a path; a second joint line portion that surrounds the first joint line portion outside the first joint line portion; and a first joint line portion and a second joint line portion, Provided with a refrigerant leak detection means for detecting refrigerant leakage into the compartment in the compartment formed between
The refrigerant leak detection means comprises an open conduit that communicates with the compartment provided in the compartment and opens to the atmosphere, and a temperature detection means provided in the open conduit,
A plurality of the plate heat exchangers are prepared, the refrigerant flow paths of the plate heat exchangers are connected in parallel, and the inside of the partition part of the plate heat exchangers communicates with each other by the open conduit. , the temperature detecting means said open shaped cold water that you wherein provided in the conduit system, the water heater or steam generator.
2枚の金属板を接合して冷媒流路を形成する冷却部となるプレート型熱交換器を備えた冷水装置・温水装置又は蒸気発生装置であって、前記2枚の金属板に、冷媒流路を形成する第1接合線部と、前記第1接合線部の外側に前記第1接合線部を囲むように第2接合線部を設け、第1接合線部と第2接合線部との間に形成される区画部に、該区画部内への冷媒漏れを検出する冷媒漏れ検出手段を設け、
前記冷媒漏れ検出手段は、前記区画部に設けられた前記区画部内に連通し大気に開放する開放状導管と、該開放状導管に設けられた冷媒センサとからなり、
前記プレート型熱交換器は複数用意され、各プレート型熱交換器の冷媒流路が並列に接続され、また、前記各プレート型熱交換器の前記区画部内は前記開放状導管により相互に連通し、前記冷媒センサが前記開放状導管に設けられていることを特徴とする冷水装置・温水装置又は蒸気発生装置。
A chilled water device, a hot water device or a steam generator provided with a plate-type heat exchanger serving as a cooling unit that joins two metal plates to form a refrigerant flow path. A first joint line portion that forms a path; a second joint line portion that surrounds the first joint line portion outside the first joint line portion; and a first joint line portion and a second joint line portion, Provided with a refrigerant leak detection means for detecting refrigerant leakage into the compartment in the compartment formed between
The refrigerant leak detection means includes an open conduit that communicates with the compartment provided in the compartment and opens to the atmosphere, and a refrigerant sensor provided in the open conduit.
A plurality of the plate heat exchangers are prepared, the refrigerant flow paths of the plate heat exchangers are connected in parallel, and the inside of the partition part of the plate heat exchangers communicates with each other by the open conduit. the refrigerant sensor the open shaped cold water that you wherein provided in the conduit system, the water heater or steam generator.
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JPS5942598B2 (en) * 1980-01-24 1984-10-16 日本ステンレス株式会社 Method for manufacturing solar heat absorption panels and plate heat exchangers
JPS56151855A (en) * 1980-04-28 1981-11-25 Hitachi Ltd Protective apparatus for cooler/hot water feeder
JP2000230761A (en) * 1999-02-09 2000-08-22 Zexel Corp Mounting structure of refrigerant leakage detecting means
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