JPH037832A - Multiple-room heating and cooling apparatus - Google Patents
Multiple-room heating and cooling apparatusInfo
- Publication number
- JPH037832A JPH037832A JP14175089A JP14175089A JPH037832A JP H037832 A JPH037832 A JP H037832A JP 14175089 A JP14175089 A JP 14175089A JP 14175089 A JP14175089 A JP 14175089A JP H037832 A JPH037832 A JP H037832A
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- refrigerant cycle
- heat source
- cooling
- heating
- 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
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 30
- 238000001816 cooling Methods 0.000 title claims abstract description 26
- 239000003507 refrigerant Substances 0.000 claims abstract description 115
- 238000001514 detection method Methods 0.000 claims description 20
- 238000004378 air conditioning Methods 0.000 claims description 8
- 238000005461 lubrication Methods 0.000 abstract description 4
- 230000002159 abnormal effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
Landscapes
- Other Air-Conditioning Systems (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は多室冷暖房装置の冷媒サイクルの詳しくは冷媒
漏洩検出に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates specifically to refrigerant leakage detection in a refrigerant cycle of a multi-room heating and cooling system.
従来の技術
従来熱源側冷媒サイクルと利用側冷媒サイクルに分離し
両者を補助熱交換器で熱交換する多室冷暖房装置の冷媒
サイクルは、第２図のようになっている。図において、
１１は圧縮機、１２は四方弁、１３は熱源側熱交換器、
１４は冷房用減圧装置、１５は暖房用減圧装置、１ｅは
暖房時に冷房用減圧装置１４を閉成する逆止弁、１７は
冷房時に暖房用減圧装置１６を閉成する逆止弁、１８は
第１補助熱交換器でこれらを環状に連接し、熱源側冷媒
サイクルを形成している。１９は第２補助熱交換器で第
１補助熱交換器１８と熱交換するように一体に形成され
ている。２０は冷媒量調整タンクで冷房時と暖房時の冷
媒量を調整している。2. Description of the Related Art Conventionally, a refrigerant cycle of a multi-room air conditioning system is shown in FIG. 2, which is separated into a heat source side refrigerant cycle and a user side refrigerant cycle, and heat exchanges between the two using an auxiliary heat exchanger. In the figure,
11 is a compressor, 12 is a four-way valve, 13 is a heat source side heat exchanger,
14 is a pressure reducing device for cooling, 15 is a heating pressure reducing device, 1e is a check valve that closes the cooling pressure reducing device 14 during heating, 17 is a check valve that closes the heating pressure reducing device 16 during cooling, and 18 is a check valve that closes the heating pressure reducing device 16 during cooling. These are connected in an annular manner by the first auxiliary heat exchanger to form a heat source side refrigerant cycle. A second auxiliary heat exchanger 19 is integrally formed to exchange heat with the first auxiliary heat exchanger 18. 20 is a refrigerant amount adjustment tank that adjusts the amount of refrigerant during cooling and heating.
２１は冷媒搬送装置で冷房時と暖房時で冷媒の流出方向
が反対となる可逆特性をもっており、これユニットｑ、
ｈに収納され接続配管で室外ユニットｆと接続されてい
る。前記第２補助熱交換器１９と冷媒量調整タンク２０
．冷媒搬送装置２１．利用側熱交換器２２ａ、２２ｂお
よび接続配管ｉ。21 is a refrigerant conveying device which has a reversible characteristic in which the outflow direction of the refrigerant is opposite during cooling and heating, and this unit q,
h and is connected to the outdoor unit f via connecting piping. The second auxiliary heat exchanger 19 and the refrigerant amount adjustment tank 20
．． Refrigerant conveyance device 21. Utilization side heat exchangers 22a, 22b and connection piping i.
’′、＋＋Ｊ’を環状連接し利用側冷媒サイクルを形成
している。'', ++J'' are connected in an annular manner to form a user-side refrigerant cycle.
以上のように構成された多室冷暖房装置について、その
動作を説明する。The operation of the multi-room heating and cooling system configured as described above will be explained.
冷房運転時は図中実線の冷媒サイクルとなり、熱源側冷
媒サイクルでは、圧縮機１１からの高温高圧ガスは四方
弁１２を通り熱源側熱交換器１３で放熱して凝縮液化し
、逆止弁１６を通って冷房用減圧装置１４で減圧され第
１補助熱交換器１８で蒸発して四方弁１２を通シ圧縮機
１１へ循環する。この時利用側冷媒サイクルの第２補助
熱交換器１９と前記第１補助熱交換器１８が熱交換し、
利用側冷媒サイクル内のガス冷媒が冷却されて液化し、
冷媒量調整タンク２０を通って冷媒搬送装置２１に送ら
れ、この冷媒搬送装置２１によって接続配管ｉ、ｉを通
って利用側熱交換器２２ａ。During cooling operation, the refrigerant cycle is indicated by the solid line in the figure. In the refrigerant cycle on the heat source side, high-temperature, high-pressure gas from the compressor 11 passes through the four-way valve 12, radiates heat in the heat source side heat exchanger 13, condenses and liquefies, and passes through the check valve 16. The air is depressurized by the cooling pressure reducing device 14, evaporated by the first auxiliary heat exchanger 18, and circulated through the four-way valve 12 to the compressor 11. At this time, the second auxiliary heat exchanger 19 of the user side refrigerant cycle and the first auxiliary heat exchanger 18 exchange heat,
The gas refrigerant in the user refrigerant cycle is cooled and liquefied,
The refrigerant is sent through the refrigerant amount adjustment tank 20 to the refrigerant transport device 21, and by this refrigerant transport device 21, it passes through the connecting pipes i and i to the user side heat exchanger 22a.
２２ｂへ送られて吸熱蒸発し、ガス化して接続配管ｉ
／ 、 ｉ ／を通って第２補助熱交換器１９に循環す
ることになる。22b, where it is endothermically evaporated, gasified, and connected to the connecting pipe i.
/, i/ to the second auxiliary heat exchanger 19.
一方、暖房運転時においては、図中破線の冷媒サイクル
となり、熱源側冷媒サイクルでは、圧縮機１１からの高
温高圧冷媒は四方弁１２から第１補助熱交換器１８に送
られ、放熱して凝縮液化し、逆止弁１７から暖房用減圧
装置１６で減圧し、熱源側熱交換器１３で吸熱蒸発し、
四方弁１２を通って圧縮機１１へ循環する。この時利用
側冷媒サイクルの第２補助熱交換器１９と前記第１補助
熱交換器１８が熱交換し、利用側冷媒サイクル内の液冷
媒が加熱されてガス化し、接続配管ｉ／ 、 １ ／を
通って利用側熱交換器２２へ送られ、暖房して放熱液化
し接続配管ｉ、ｊを通って冷媒搬送装置２１へ送られ、
冷媒量調整タンク２０から第２補助熱交換器１９へ循環
する。On the other hand, during heating operation, the refrigerant cycle is indicated by the broken line in the figure, and in the heat source side refrigerant cycle, the high-temperature, high-pressure refrigerant from the compressor 11 is sent from the four-way valve 12 to the first auxiliary heat exchanger 18, radiates heat and condenses. It is liquefied, the pressure is reduced by the heating pressure reducing device 16 from the check valve 17, and it is endothermically evaporated in the heat source side heat exchanger 13.
It circulates through the four-way valve 12 to the compressor 11. At this time, the second auxiliary heat exchanger 19 of the user-side refrigerant cycle and the first auxiliary heat exchanger 18 exchange heat, and the liquid refrigerant in the user-side refrigerant cycle is heated and gasified, and the connecting pipes i/, 1/ The refrigerant is sent to the user-side heat exchanger 22 through the heat exchanger 22, heated, liquefied with heat radiation, and sent to the refrigerant conveying device 21 through the connecting pipes i and j.
The refrigerant is circulated from the refrigerant amount adjustment tank 20 to the second auxiliary heat exchanger 19.
発明が解決しようとする課題
しかしながら上記の構成では、利用側冷媒サイクル内の
冷媒が徐々に漏れた場合、ある程度までは室内ユニット
の能力にあまり影響がなく、ある点で冷媒搬送装置に多
量のガス冷媒が吸入され極端に冷媒循環量が低下し室内
ユニットの急激な能力低下となるとともに、冷媒搬送装
置の潤滑不足となり冷媒搬送装置を損傷する恐れがあっ
た。Problems to be Solved by the Invention However, with the above configuration, if the refrigerant in the user-side refrigerant cycle gradually leaks, it will not have much effect on the indoor unit's capacity to a certain extent, and at a certain point a large amount of gas will leak into the refrigerant conveying device. The refrigerant is sucked in and the amount of refrigerant circulated is extremely reduced, leading to a sudden drop in the capacity of the indoor unit.In addition, there is a risk that the refrigerant transport device may be damaged due to insufficient lubrication of the refrigerant transport device.
本発明は、上記課題に鑑み簡単な構成で利用側冷媒サイ
クルの冷媒漏洩を検出し、冷媒漏洩による冷媒搬送装置
損傷の恐れのない多室冷暖房装置を提供するものである
。In view of the above-mentioned problems, the present invention provides a multi-room air conditioning and heating system that detects refrigerant leakage in a user-side refrigerant cycle with a simple configuration and is free from damage to a refrigerant transport device due to refrigerant leakage.
課題を解決するだめの手段
上記課題を解決するために、本発明の多室冷暖房装置は
、熱源側冷媒サイクルと利用側冷媒サイクルを分離し、
前記熱源側冷媒サイクルの圧縮機の吐出温度を検出する
熱源側吐出温度検出装置と、前記利用側冷媒サイクルの
冷暖房負荷を検出する利用側吸込空気温度検出装置と、
この両温度検出装置で検出した温度差によって利用側冷
媒サイクルの冷媒漏洩を検出する制御装置とを備えたも
のである。Means for Solving the Problems In order to solve the above problems, the multi-room air conditioning system of the present invention separates the heat source side refrigerant cycle and the usage side refrigerant cycle,
a heat source side discharge temperature detection device that detects the discharge temperature of the compressor of the heat source side refrigerant cycle; a user side intake air temperature detection device that detects the heating and cooling load of the user side refrigerant cycle;
The system also includes a control device that detects refrigerant leakage in the user-side refrigerant cycle based on the temperature difference detected by both temperature detection devices.
作 用
本発明は上記した構成によって、熱源側冷媒サイクルの
圧縮機の吐出温度と利用側冷媒サイクルの吸込空気温度
との温度差による制御としているので利用側冷媒サイク
ルの冷媒漏洩を確実に事前に検出することが可能となり
、制御装置も簡単になることとなる。Effect of the Invention With the above configuration, the present invention performs control based on the temperature difference between the discharge temperature of the compressor of the heat source side refrigerant cycle and the suction air temperature of the user side refrigerant cycle, so refrigerant leakage of the user side refrigerant cycle can be reliably prevented in advance. detection becomes possible, and the control device becomes simpler.
実施例
以下本発明の一実施例の冷暖房装置について、図面を参
照しながら説明する。第１図は本発明の実施例における
多室冷暖房装置の冷媒サイクルを示すものである。EXAMPLE Hereinafter, a heating and cooling system according to an example of the present invention will be described with reference to the drawings. FIG. 1 shows a refrigerant cycle of a multi-room air conditioning system according to an embodiment of the present invention.
基本構成は第２図の従来例と同一であり、ここでは変わ
っている所だけを説明する。図において、３１ａは熱源
側冷媒サイクルの圧縮機１１の吐出温度を検出する熱源
側吐出温度検出装置、３１ｂは利用側冷媒サイクルの冷
暖房負荷を検出する利用側吸込空気温度検出装置でそれ
ぞれ室外ユニットｆの圧縮機１１の吐出配管と利用側冷
媒サイクルの空気吸込側に取付けられている。３２は熱
源側吐出温度検出装置３１ａと利用側吸込空気温度検出
装置３１ｂで検出した温度差で利用側冷媒サイクルの冷
媒漏洩の検出を行なう制御装置である。The basic configuration is the same as the conventional example shown in FIG. 2, and only the differences will be explained here. In the figure, 31a is a heat source side discharge temperature detecting device that detects the discharge temperature of the compressor 11 of the heat source side refrigerant cycle, and 31b is a user side suction air temperature detecting device that detects the heating and cooling load of the user side refrigerant cycle, and the outdoor unit f. It is attached to the discharge piping of the compressor 11 and the air suction side of the user-side refrigerant cycle. Reference numeral 32 denotes a control device that detects refrigerant leakage in the user-side refrigerant cycle based on the temperature difference detected by the heat source-side discharge temperature detector 31a and the user-side suction air temperature detector 31b.
以上のように構成された多室冷暖房装置についてその動
作を説明する。The operation of the multi-room heating and cooling system configured as described above will be explained.
冷凍サイクルの基本動作については従来例と同一であり
、ここではその違っている所、つまり利用側冷媒サイク
ルの冷媒漏洩検出動作について説明する。The basic operation of the refrigeration cycle is the same as that of the conventional example, and here we will explain the difference, that is, the refrigerant leak detection operation of the user side refrigerant cycle.
冷房運転時は熱源側冷媒サイクルの圧縮機１１の吐出温
度と利用側冷媒サイクルの吸込空気温度は室内ユニット
ｑ、ｈの負荷によっである一定の温度差で運転するよう
に熱源側冷媒サイクルの能力や冷媒搬送装置２１の能力
を制御している。During cooling operation, the discharge temperature of the compressor 11 of the heat source side refrigerant cycle and the suction air temperature of the user side refrigerant cycle are adjusted so that the heat source side refrigerant cycle operates with a certain temperature difference depending on the load of the indoor units q and h. The capacity and the capacity of the refrigerant conveying device 21 are controlled.
従って、利用側冷媒サイクルの冷媒が漏洩した場合に、
ある程度（例えば２０〜３ｏｎ ）の冷媒が漏洩しても
熱源側冷媒サイクルの能力アップや、冷媒搬送装置２１
の能力アップ等により室内ユニットｑ、ｈの能力はあま
り変化しない。Therefore, if the refrigerant in the user-side refrigerant cycle leaks,
Even if a certain amount (for example, 20 to 3 on) of refrigerant leaks, the capacity of the heat source side refrigerant cycle can be increased and the refrigerant conveyance device 21
The capabilities of indoor units q and h do not change much due to the increase in their capabilities.
但し熱源側冷媒サイクルの圧縮機１１の吐出温度は前述
の冷媒の漏洩に従って第１補助熱交換器１８と第２補助
熱交換器１９の熱交換量が低下するため徐々に低下し、
利用側冷媒サイクルの吸込空気温度との温度差は徐々に
小さくなる（暖房運転では逆に大きくなる）。これを両
温度検出装置で検出し、この温度差がある値以下（暖房
運転では逆にある値を超えた場合）となった場合に、つ
まり冷媒搬送装置２１へ多量のガス冷媒が流入し、冷媒
搬送能力が極端に減少し、冷暖房能力が大きく低下する
とともに冷媒搬送装置２１の軸受部の潤滑不足によって
損傷する以前に異常を表示して冷暖房装置の運転を停止
するものである。However, the discharge temperature of the compressor 11 of the heat source side refrigerant cycle gradually decreases as the amount of heat exchanged between the first auxiliary heat exchanger 18 and the second auxiliary heat exchanger 19 decreases due to the aforementioned refrigerant leakage.
The temperature difference between the intake air temperature of the user-side refrigerant cycle gradually decreases (on the contrary, it increases during heating operation). This is detected by both temperature detection devices, and when this temperature difference is below a certain value (on the contrary, exceeds a certain value in heating operation), that is, a large amount of gas refrigerant flows into the refrigerant conveying device 21, This system displays an abnormality and stops the operation of the air-conditioning/heating system before the refrigerant conveyance capacity is extremely reduced, the cooling/heating capacity is greatly reduced, and the bearings of the refrigerant conveyance apparatus 21 are damaged due to lack of lubrication.
以上のように本実施例によれば、熱源側冷媒サイクルの
圧縮機吐出温度を検出する熱源側吐出温度検出装置と利
用側冷媒サイクルの冷暖房負荷を検出する利用側吸込空
気温度検出装置と、この両温度検出装置で検出した温度
差によって利用側冷媒サイクルの冷媒漏洩を検出する制
御装置とを備えたので、簡単な構成で早期に確実に冷媒
漏洩を検出することができることとなシ、冷暖房能力の
急激な低下や、冷媒搬送装置の損傷を防止できるもので
ある。As described above, according to this embodiment, the heat source side discharge temperature detection device detects the compressor discharge temperature of the heat source side refrigerant cycle, the user side suction air temperature detection device detects the heating and cooling load of the user side refrigerant cycle, and the Since it is equipped with a control device that detects refrigerant leakage in the user-side refrigerant cycle based on the temperature difference detected by both temperature detection devices, refrigerant leakage can be detected early and reliably with a simple configuration. This can prevent a sudden drop in refrigerant and damage to the refrigerant conveyance device.
発明の効果
以上のように本発明は、熱源側冷媒サイクルの吐出温度
を検出する熱源側吐出温度検出装置と利用側冷媒サイク
ルの冷暖房負荷を検出する利用側吸込空気温度検出装置
と、この両温度検出装置で検出した温度差によって利用
側冷媒サイクルの冷媒漏洩を検出する制御装置とを備え
たので、簡単な構成で早期に確実に冷媒漏洩を検出し、
冷媒搬送能力の急激な減少による冷暖房能力の極端な低
下や冷媒搬送装置の軸受部の潤滑不足による損傷を防止
できる効果がある。Effects of the Invention As described above, the present invention provides a heat source side discharge temperature detection device for detecting the discharge temperature of the heat source side refrigerant cycle, a user side suction air temperature detection device for detecting the heating and cooling load of the user side refrigerant cycle, and a temperature detection device for detecting the temperature of both of these. Equipped with a control device that detects refrigerant leakage in the user-side refrigerant cycle based on the temperature difference detected by the detection device, refrigerant leakage can be detected early and reliably with a simple configuration.
This has the effect of preventing an extreme drop in cooling and heating capacity due to a sudden decrease in refrigerant transport capacity and damage due to insufficient lubrication of the bearings of the refrigerant transport device.
第１図は本発明の実施例における多室冷暖房装置の冷媒
サイクル図、第２図は従来の多室冷暖房装置の冷媒サイ
クル図である。
１１・・・・・・圧縮機、１３・・・・・・熱源側熱交
換器、１８・・・・・・第１補助熱交換器、１９・・・
・・・第２補助熱交換器、２１・・・・・・冷媒搬送装
置、２２ａ、２２ｂ・・・・・・利用側熱交換器、３１
ａ・・・・・・熱源側吐出温度検出装置、３１ｂ・・・
・・・利用側吸込空気温度検出装置、３２・・・・・・
制御装置。FIG. 1 is a refrigerant cycle diagram of a multi-room air conditioning system according to an embodiment of the present invention, and FIG. 2 is a refrigerant cycle diagram of a conventional multi-room air conditioning system. 11... Compressor, 13... Heat source side heat exchanger, 18... First auxiliary heat exchanger, 19...
... Second auxiliary heat exchanger, 21 ... Refrigerant conveyance device, 22a, 22b ... User side heat exchanger, 31
a...Heat source side discharge temperature detection device, 31b...
... User-side intake air temperature detection device, 32...
Control device.
Claims (1)
換器を環状に連接してなる熱源側冷媒サイクルと、この
第１補助熱交換器と一体に形成し、熱交換する第２補助
熱交換器と冷媒搬送装置および複数の利用側熱交換器を
有する利用側冷媒サイクルと、前記利用側冷媒サイクル
の冷暖房負荷を検出する利用吸込空気検出装置と、前記
熱源側冷媒サイクルの吐出温度を検出する熱源側吐出温
度検出装置と、この両温度検出装置で検出した温度差に
よって利用側冷媒サイクルの冷媒漏洩を検出する冷媒漏
洩検出装置とを備えた多室冷暖房装置。A heat source side refrigerant cycle formed by connecting a compressor, a heat source side heat exchanger, a pressure reducing device, and a first auxiliary heat exchanger in an annular manner, and a second auxiliary heat exchanger that is formed integrally with the first auxiliary heat exchanger and exchanges heat. A user-side refrigerant cycle having a heat exchanger, a refrigerant conveyance device, and a plurality of user-side heat exchangers, a utilization suction air detection device for detecting the heating and cooling load of the user-side refrigerant cycle, and a utilization-side refrigerant cycle that detects the discharge temperature of the heat source-side refrigerant cycle. A multi-room air-conditioning/heating system comprising a heat source side discharge temperature detection device for detecting the discharge temperature, and a refrigerant leakage detection device for detecting refrigerant leakage in the user side refrigerant cycle based on the temperature difference detected by both temperature detection devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14175089A JPH037832A (en) | 1989-06-02 | 1989-06-02 | Multiple-room heating and cooling apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14175089A JPH037832A (en) | 1989-06-02 | 1989-06-02 | Multiple-room heating and cooling apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH037832A true JPH037832A (en) | 1991-01-16 |
Family
ID=15299327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14175089A Pending JPH037832A (en) | 1989-06-02 | 1989-06-02 | Multiple-room heating and cooling apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH037832A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63181599U (en) * | 1987-05-18 | 1988-11-24 |
-
1989
- 1989-06-02 JP JP14175089A patent/JPH037832A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63181599U (en) * | 1987-05-18 | 1988-11-24 |
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