CN206377877U - A kind of twin-stage throttling two stage compression refrigeration system with qi leel - Google Patents
A kind of twin-stage throttling two stage compression refrigeration system with qi leel Download PDFInfo
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- CN206377877U CN206377877U CN201621419948.1U CN201621419948U CN206377877U CN 206377877 U CN206377877 U CN 206377877U CN 201621419948 U CN201621419948 U CN 201621419948U CN 206377877 U CN206377877 U CN 206377877U
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 18
- 230000006835 compression Effects 0.000 title claims abstract description 16
- 238000007906 compression Methods 0.000 title claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 39
- 230000001105 regulatory effect Effects 0.000 claims abstract description 8
- 239000007791 liquid phase Substances 0.000 claims abstract description 7
- 230000005501 phase interface Effects 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims 3
- 239000007792 gaseous phase Substances 0.000 claims 2
- 239000007789 gas Substances 0.000 claims 1
- 238000000926 separation method Methods 0.000 abstract description 8
- 239000012071 phase Substances 0.000 abstract description 6
- 239000003507 refrigerant Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
本实用新型公开了一种带气分的双级节流两级压缩制冷系统。本实用新型制冷系统的高压级压缩机出口与冷凝器入口连接，冷凝器出口与过冷盘管连接，过冷盘管出口经第一节流阀后与第一气液分离器连接，第一气液分离器气相接口与回热器入口连接，第一气液分离器液相出口经第二节流阀后与第二气液分离器连接，第二气液分离器液相出口与蒸发器入口连接，蒸发器出口与第二气液分离器气相出口合并后与低压级压缩机入口连接，低压级压缩机出口与回热器出口合并后与所述高压级压缩机连接，回热器出口与第二气液分离器气相出口之间连接旁通管，旁通管装有压力调节阀，所述过冷盘管置于所述回热器内。本实用新型通过压差旁通调节阀改善了低压级压缩机吸气压力低的问题。
The utility model discloses a double-stage throttling and two-stage compression refrigeration system with gas separation. The outlet of the high-pressure compressor of the refrigeration system of the utility model is connected to the inlet of the condenser, the outlet of the condenser is connected to the subcooling coil, and the outlet of the subcooling coil is connected to the first gas-liquid separator after passing through the first throttle valve. The gas phase interface of the gas-liquid separator is connected to the inlet of the regenerator, the liquid phase outlet of the first gas-liquid separator is connected to the second gas-liquid separator after passing through the second throttle valve, and the liquid phase outlet of the second gas-liquid separator is connected to the evaporator The inlet is connected, the outlet of the evaporator is combined with the gas phase outlet of the second gas-liquid separator, and then connected to the inlet of the low-pressure compressor, the outlet of the low-pressure compressor is combined with the outlet of the regenerator, and then connected to the high-pressure compressor, and the outlet of the regenerator A bypass pipe is connected with the gas phase outlet of the second gas-liquid separator, and the bypass pipe is equipped with a pressure regulating valve, and the subcooling coil is placed in the regenerator. The utility model improves the problem of low suction pressure of the low-pressure compressor through the differential pressure bypass regulating valve.
Description
技术领域technical field
本实用新型涉及一种低温两级压缩式制冷系统，属于制冷领域。The utility model relates to a low-temperature two-stage compression refrigeration system, which belongs to the field of refrigeration.
背景技术Background technique
单级压缩式制冷最低能到零下四十度，在零下四十度到零下六十度的范围内采用两级压缩的方式制冷效率较复叠的要高，双级压缩制冷系统包括一级节流压缩系统和两级节流压缩系统，对于普通的双级压缩制冷系统而言节流后的气液混合制冷剂同时进入蒸发器，减少了液态制冷剂与蒸发器的接触面积，因此具有较小的换热性能，节流后的制冷剂再次节流后若含有气态制冷剂会造成损失，而往往较低温度下，低压机压缩机的吸气压力比较低，造成较高的排气温度，因此在改善上述情况下提出本实用新型一种带气分的双级节流两级压缩制冷系统。The single-stage compression refrigeration can reach minus 40 degrees, and the refrigeration efficiency of the two-stage compression method in the range of minus 40 degrees to minus 60 degrees is higher than that of the cascade. The two-stage compression refrigeration system includes one stage Flow compression system and two-stage throttling compression system, for ordinary two-stage compression refrigeration system, the throttled gas-liquid mixed refrigerant enters the evaporator at the same time, which reduces the contact area between the liquid refrigerant and the evaporator, so it has a relatively Small heat transfer performance, if the throttling refrigerant contains gaseous refrigerant after throttling again, it will cause losses, and often at lower temperatures, the suction pressure of the compressor of the low pressure machine is relatively low, resulting in a higher exhaust temperature Therefore, in improving the above-mentioned situation, the utility model proposes a two-stage throttling two-stage compression refrigeration system with gas separation.
实用新型内容Utility model content
本实用新型的目的是针对现有技术中存在的技术缺陷，而提供一种带气分的双级节流两级压缩制冷系统，利用气分和旁通压差调节阀来提高系统的高性能。The purpose of this utility model is to provide a two-stage throttling and two-stage compression refrigeration system with air separation for the technical defects existing in the prior art, and use the air separation and bypass pressure difference regulating valve to improve the high performance of the system .
为实现本实用新型的目的所采用的技术方案是：The technical scheme adopted for realizing the purpose of this utility model is:
一种带气分的双级节流两级压缩制冷系统，所述制冷系统的高压级压缩机出口与冷凝器入口连接，所述冷凝器出口与过冷盘管连接，所述过冷盘管出口经第一节流阀后与第一气液分离器连接，所述第一气液分离器气相接口与回热器入口连接，所述第一气液分离器液相出口经第二节流阀后与第二气液分离器连接，所述第二气液分离器液相出口与蒸发器入口连接，所述蒸发器出口与所述第二气液分离器气相出口合并后与低压级压缩机入口连接，所述低压级压缩机出口与所述回热器出口合并后与所述高压级压缩机连接，所述回热器出口与所述第二气液分离器气相出口之间连接旁通管，旁通管装有压力调节阀，所述过冷盘管置于所述回热器内。A two-stage throttling two-stage compression refrigeration system with gas separation, the outlet of the high-pressure compressor of the refrigeration system is connected to the inlet of the condenser, the outlet of the condenser is connected to the subcooling coil, and the subcooling coil The outlet is connected to the first gas-liquid separator after passing through the first throttle valve, the gas phase interface of the first gas-liquid separator is connected to the inlet of the regenerator, and the liquid phase outlet of the first gas-liquid separator is throttled through the second After the valve, it is connected to the second gas-liquid separator, and the liquid phase outlet of the second gas-liquid separator is connected to the inlet of the evaporator, and the outlet of the evaporator is combined with the gas phase outlet of the second gas-liquid separator to be compressed by the low-pressure stage. The outlet of the low-pressure stage compressor is connected to the outlet of the regenerator after being combined with the outlet of the high-pressure stage compressor, and the outlet of the regenerator is connected to the gas phase outlet of the second gas-liquid separator. The bypass pipe is equipped with a pressure regulating valve, and the subcooling coil is placed in the regenerator.
与现有技术相比，本实用新型的有益效果是：Compared with the prior art, the beneficial effects of the utility model are:
本实用新型的一种带气分的双级节流两级压缩制冷系统与现有两级压缩式制冷技术相比，具有以下特点：Compared with the existing two-stage compression refrigeration technology, the utility model has the following characteristics:
1、第一次节流后利用气液分离器减少了第二次的节流损失。1. After the first throttling, the gas-liquid separator is used to reduce the second throttling loss.
2、第二次节流后利用气液分离器将节流后的气、液分离，保证进入蒸发器内的全为液态，提高了蒸发器的换热性能。2. After the second throttling, use the gas-liquid separator to separate the throttling gas and liquid to ensure that all the gas entering the evaporator is in a liquid state, which improves the heat transfer performance of the evaporator.
3、通过压差旁通调节阀改善了低压级压缩机吸气压力低的问题。3. Through the differential pressure bypass regulating valve, the problem of low suction pressure of the low-pressure stage compressor is improved.
附图说明Description of drawings
图1所示为本实用新型一种带气分的双级节流两级压缩制冷系统的原理图。Figure 1 is a schematic diagram of a two-stage throttling two-stage compression refrigeration system with air separation of the present invention.
具体实施方式detailed description
以下结合附图和具体实施例对本实用新型作进一步详细说明。Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.
一种带气分的双级节流两级压缩制冷系统，如图1所示，的高压级压缩机1出口与冷凝器4入口连接，所述冷凝器4出口与过冷盘管6连接，所述过冷盘管6出口经第一节流阀7后与第一气液分离器8连接，所述第一气液分离器8气相接口与回热器5入口连接，所述第一气液分离器8液相出口经第二节流阀9后与第二气液分离器10连接，所述第二气液分离器10液相出口与蒸发器11入口连接，所述蒸发器11出口与所述第二气液分离器10气相出口合并后与低压级压缩机2入口连接，所述低压级压缩机2出口与所述回热器5出口合并后与所述高压级压缩机1入口连接，所述回热器5出口与所述第二气液分离器10气相出口之间连接旁通管，旁通管装有压力调节阀3，所述过冷盘管6置于所述回热器5内。A two-stage throttling two-stage compression refrigeration system with gas separation, as shown in Figure 1, the outlet of the high-pressure stage compressor 1 is connected to the inlet of the condenser 4, and the outlet of the condenser 4 is connected to the subcooling coil 6, The outlet of the subcooling coil 6 is connected to the first gas-liquid separator 8 after passing through the first throttle valve 7, and the gas phase interface of the first gas-liquid separator 8 is connected to the inlet of the regenerator 5. The liquid phase outlet of the liquid separator 8 is connected to the second gas-liquid separator 10 after passing through the second throttle valve 9, and the liquid phase outlet of the second gas-liquid separator 10 is connected to the inlet of the evaporator 11, and the outlet of the evaporator 11 The outlet of the gas phase of the second gas-liquid separator 10 is combined with the inlet of the low-pressure compressor 2, and the outlet of the low-pressure compressor 2 is combined with the outlet of the regenerator 5 and connected with the inlet of the high-pressure compressor 1 connection, a bypass pipe is connected between the outlet of the regenerator 5 and the gas phase outlet of the second gas-liquid separator 10, the bypass pipe is equipped with a pressure regulating valve 3, and the subcooling coil 6 is placed in the return inside the heater 5.
冷凝后的液态经过回热器5过冷后能够减少节流损失，第一次节流后的液态经过第二次节流后压力更低，节流后的气液分离后液态制冷剂全部进入蒸发器11，保证蒸发器11的高效换热性能，当蒸发压力过低时能够调节压力调节阀3保证低压级压缩机2的吸气压力，改善低压压缩机2吸气压力低的问题。The condensed liquid state can reduce the throttling loss after being supercooled by the regenerator 5, and the liquid state after the first throttling has a lower pressure after the second throttling, and the liquid refrigerant after the throttling gas-liquid separation all enters The evaporator 11 ensures the high-efficiency heat exchange performance of the evaporator 11. When the evaporation pressure is too low, the pressure regulating valve 3 can be adjusted to ensure the suction pressure of the low-pressure compressor 2, and the problem of low suction pressure of the low-pressure compressor 2 can be improved.
以上所述仅是本实用新型的优选实施方式，应当指出的是，对于本技术领域的普通技术人员来说，在不脱离本实用新型原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本实用新型的保护范围。The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made, these Improvement and retouching should also be regarded as the protection scope of the present utility model.
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| CN201621419948.1U CN206377877U (en) | 2016-12-23 | 2016-12-23 | A kind of twin-stage throttling two stage compression refrigeration system with qi leel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108413638A (en) * | 2018-03-16 | 2018-08-17 | 珠海格力电器股份有限公司 | Self-cascade refrigeration system with double-stage compression |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108413638A (en) * | 2018-03-16 | 2018-08-17 | 珠海格力电器股份有限公司 | Self-cascade refrigeration system with double-stage compression |
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