CN209763527U - A low-pressure bypass device for the flash barrel of an air-source screw cold water heat pump unit - Google Patents
A low-pressure bypass device for the flash barrel of an air-source screw cold water heat pump unit Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 22
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- 230000001502 supplementing effect Effects 0.000 claims 1
- 230000006835 compression Effects 0.000 abstract description 5
- 238000007906 compression Methods 0.000 abstract description 5
- 230000009469 supplementation Effects 0.000 abstract 1
- 239000003507 refrigerant Substances 0.000 description 9
- 238000001816 cooling Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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Abstract
本实用新型提出了一种空气源螺杆冷水热泵机组闪蒸桶低压旁通装置，其特征在于：所述螺杆压缩机上端分别于冷凝器和经济器连接，所述冷凝器和经济器连接，所述螺杆压缩机下端与气液分离器连接，所述气液分离器与蒸发器上端连接，所述蒸发器下端与经济器连接。与现有技术相比，本实用新型涉及一种空气源螺杆冷水热泵机组闪蒸桶低压旁通装置，在压缩机吸气结束和压缩开始的临界点，利用闪蒸型经济器的闪蒸蒸汽进行补气；当压缩机吸气压力过低时，打开低压提升电磁阀，使之恢复到压缩机允许的范围内；当压缩机的排气压力过高时，打开手动膨胀阀，旁通部分高温高压的气体到蒸发器，降低压缩机排气的压力。
The utility model proposes a low-pressure bypass device for the flash barrel of an air source screw cold water heat pump unit, which is characterized in that: the upper end of the screw compressor is respectively connected to the condenser and the economizer, and the condenser is connected to the economizer. The lower end of the screw compressor is connected to the gas-liquid separator, the gas-liquid separator is connected to the upper end of the evaporator, and the lower end of the evaporator is connected to the economizer. Compared with the prior art, the utility model relates to a low-pressure bypass device for the flash barrel of an air-source screw cold water heat pump unit, which utilizes the flash steam of the flash economizer at the critical point between the end of compressor suction and the start of compression. Carry out air supplementation; when the suction pressure of the compressor is too low, open the low-pressure lifting solenoid valve to restore it to the allowable range of the compressor; when the exhaust pressure of the compressor is too high, open the manual expansion valve and bypass the part The high-temperature and high-pressure gas goes to the evaporator, reducing the exhaust pressure of the compressor.
Description
【技术领域】【Technical field】
本实用新型涉及制冷空调设备领域，具体涉及一种空气源螺杆冷水热泵机组闪蒸桶低压旁通装置。The utility model relates to the field of refrigeration and air-conditioning equipment, in particular to a low-pressure bypass device for a flash barrel of an air source screw cold water heat pump unit.
【背景技术】【Background technique】
空气源螺杆冷水热泵机组不占用机房，可以放置在楼顶等空间，不需要冷却塔，没有冷却水系统，系统简单，可以同时满足制冷和供暖需求，还可以满足热水需求，在民用和商用领域中得到广泛的应用。而现有的空气源螺杆冷水热泵机组主要存在以下问题：1、热泵在低温环境下工作时，由于蒸发压力较低，为了维持供水温度和冷凝温度在一定的值，易造成机器压缩比增大，循环的节流损失增加，压缩效率急剧下降，最终导致制冷系数偏低。2、制冷剂充注量不足，造成压缩机吸气压力过低，制冷效果差。3、压缩机的电机靠吸入制冷剂进行冷却，高压比下，系统的制冷剂循环量减少，电机得不到良好的冷却，排气压力过高。4、带经济器的螺杆压缩机可以大幅度提高制冷量及制冷系数，蒸发温度越低，冷凝温度越高，效果越明显，但是目前经济器普遍采用板式换热器，其换热效率差。The air source screw cold water heat pump unit does not occupy the machine room and can be placed in the roof and other spaces. It does not need a cooling tower or a cooling water system. The system is simple and can meet the cooling and heating needs at the same time. It can also meet the hot water demand. It is used in civil and commercial applications. widely used in the field. However, the existing air source screw chilled water heat pump units mainly have the following problems: 1. When the heat pump works in a low temperature environment, due to the low evaporation pressure, in order to maintain the supply water temperature and condensation temperature at a certain value, the compression ratio of the machine is likely to increase. , the throttling loss of the cycle increases, and the compression efficiency drops sharply, which eventually leads to a low refrigeration coefficient. 2. Insufficient charge of refrigerant causes the suction pressure of the compressor to be too low and the cooling effect is poor. 3. The motor of the compressor is cooled by inhaling refrigerant. Under the high pressure ratio, the refrigerant circulation volume of the system is reduced, the motor cannot be cooled well, and the exhaust pressure is too high. 4. The screw compressor with an economizer can greatly increase the cooling capacity and refrigeration coefficient. The lower the evaporation temperature is, the higher the condensation temperature is, and the effect is more obvious. However, the plate heat exchanger is generally used in the economizer at present, and its heat exchange efficiency is poor.
【实用新型内容】【Content of utility model】
本实用新型的目的在于克服上述现有技术的不足，提供一种空气源螺杆冷水热泵机组闪蒸桶低压旁通装置，其旨在解决现有技术中空气源螺杆冷水热泵机组结构复杂、成本昂贵、效果不佳等技术问题。The purpose of this utility model is to overcome the deficiencies of the above-mentioned prior art, and provide a low-pressure bypass device for the flash tank of the air source screw cold water heat pump unit, which aims to solve the complex structure and high cost of the air source screw cold water heat pump unit in the prior art , poor effect and other technical problems.
为实现上述目的，本实用新型提出了一种空气源螺杆冷水热泵机组闪蒸桶低压旁通装置，其特征在于：包括螺杆压缩机、冷凝器、闪蒸罐供液电磁阀、经济器、节流阀、蒸发器、气液分离器、低压提升电磁阀、手动膨胀阀，所述螺杆压缩机上端分别于冷凝器和经济器连接，所述冷凝器和经济器连接，所述冷凝器和经济器之间设有闪蒸罐供液电磁阀，所述螺杆压缩机下端与气液分离器连接，所述气液分离器与蒸发器上端连接，所述蒸发器下端与经济器连接，所述蒸发器与经济器之间设有节流阀。In order to achieve the above purpose, the utility model proposes a low-pressure bypass device for the flash tank of the air source screw cold water heat pump unit, which is characterized in that it includes a screw compressor, a condenser, a liquid supply solenoid valve for the flash tank, an economizer, a section Flow valve, evaporator, gas-liquid separator, low-pressure lift solenoid valve, manual expansion valve, the upper end of the screw compressor is respectively connected to the condenser and the economizer, the condenser is connected to the economizer, and the condenser is connected to the economizer There is a flash tank liquid supply solenoid valve between the compressors, the lower end of the screw compressor is connected to the gas-liquid separator, the gas-liquid separator is connected to the upper end of the evaporator, the lower end of the evaporator is connected to the economizer, and the There is a throttle valve between the evaporator and the economizer.
作为优选，所述螺杆压缩机上端设有有补气口和排气口，所述螺杆压缩机下端设有吸气口，所述吸气口与蒸发器连接，所述补气口一路通过低压提升电磁阀连接螺杆压缩机的吸气口，另一路连接闪蒸罐经济器，所述排气口一路连接冷凝器，另一路通过手动膨胀阀连接蒸发器。As a preference, the upper end of the screw compressor is provided with an air supply port and an exhaust port, the lower end of the screw compressor is provided with a suction port, the suction port is connected to the evaporator, and the air supply port passes through a low-pressure lifting electromagnetic all the way. The valve is connected to the suction port of the screw compressor, the other is connected to the flash tank economizer, one of the exhaust ports is connected to the condenser, and the other is connected to the evaporator through a manual expansion valve.
作为优选，所述补气口的第一路设有用于检测螺杆压缩机的吸气口压力的第一压差传感器，所述排气口的第二路设有用于检测螺杆压缩机的排气口压力第二压差传感器。Preferably, the first path of the air supplement port is provided with a first differential pressure sensor for detecting the suction port pressure of the screw compressor, and the second path of the exhaust port is provided with a discharge port for detecting the screw compressor. Pressure second differential pressure sensor.
作为优选，所述第一压差传感器通过电信号与低压提升电磁阀连接，第二压差传感器与手动膨胀阀连接。Preferably, the first differential pressure sensor is connected to the low-pressure lift solenoid valve through an electrical signal, and the second differential pressure sensor is connected to the manual expansion valve.
本实用新型的有益效果：与现有技术相比，本实用新型涉及一种空气源螺杆冷水热泵机组闪蒸桶低压旁通装置，利用螺杆压缩机的吸气、压缩和排气过程处于不同空间位置的特点，在压缩机吸气结束和压缩开始的临界点，利用闪蒸型经济器的闪蒸蒸汽进行补气；同时，当压缩机吸气压力过低时，打开低压提升电磁阀，从压缩机的中压补气口处，引流部分中压、中温气态制冷剂到压缩机的吸入口，抬升吸气压力，使之恢复到压缩机允许的范围内；当压缩机的排气压力过高时，打开手动膨胀阀，旁通部分高温高压的气体到蒸发器，降低压缩机排气的压力。闪蒸型经济器能效比高于板式经济器，换热效率好。Beneficial effects of the utility model: Compared with the prior art, the utility model relates to a low-pressure bypass device for the flash tank of the air source screw cold water heat pump unit, which utilizes the suction, compression and exhaust processes of the screw compressor in different spaces The characteristics of the location, at the critical point where the compressor suction ends and the compression starts, the flash steam of the flash economizer is used to replenish air; at the same time, when the compressor suction pressure is too low, open the low-pressure lift solenoid valve, from At the medium-pressure air supply port of the compressor, part of the medium-pressure and medium-temperature gaseous refrigerant is diverted to the suction port of the compressor to raise the suction pressure and restore it to the allowable range of the compressor; when the discharge pressure of the compressor is too high At this time, open the manual expansion valve to bypass part of the high-temperature and high-pressure gas to the evaporator to reduce the exhaust pressure of the compressor. The energy efficiency ratio of the flash economizer is higher than that of the plate economizer, and the heat exchange efficiency is good.
本实用新型的特征及优点将通过实施例结合附图进行详细说明。The features and advantages of the utility model will be described in detail through embodiments in conjunction with the accompanying drawings.
【附图说明】【Description of drawings】
图1是本实用新型实施例一种空气源螺杆冷水热泵机组闪蒸桶低压旁通装置的结构示意图；Fig. 1 is a structural schematic diagram of a low-pressure bypass device for a flash barrel of an air source screw cold water heat pump unit according to an embodiment of the utility model;
图2是本实用新型实施例的螺杆压缩机的结构示意图。Fig. 2 is a structural schematic diagram of the screw compressor of the embodiment of the utility model.
图中：1-螺杆压缩机、11-吸气口、12-补气口、13-排气口、14-第一压差传感器、15-第二压差传感器、2-冷凝器、3-闪蒸罐供液电磁阀、4-经济器、5-节流阀、6-蒸发器、7-气液分离器、8-低压提升电磁阀、9-手动膨胀阀。In the figure: 1-screw compressor, 11-suction port, 12-air supply port, 13-exhaust port, 14-first differential pressure sensor, 15-second differential pressure sensor, 2-condenser, 3-flash Steam tank liquid supply solenoid valve, 4-economizer, 5-throttle valve, 6-evaporator, 7-gas-liquid separator, 8-low pressure lift solenoid valve, 9-manual expansion valve.
【具体实施方式】【Detailed ways】
为使本实用新型的目的、技术方案和优点更加清楚明了，下面通过附图及实施例，对本实用新型进行进一步详细说明。但是应该理解，此处所描述的具体实施例仅仅用以解释本实用新型，并不用于限制本实用新型的范围。此外，在以下说明中，省略了对公知结构和技术的描述，以避免不必要地混淆本实用新型的概念。In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail through the accompanying drawings and embodiments below. However, it should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the scope of the utility model. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessarily confusing the concept of the present invention.
参阅图1和图2，本实用新型实施例提供一种空气源螺杆冷水热泵机组闪蒸桶低压旁通装置，其特征在于：包括螺杆压缩机1、冷凝器2、闪蒸罐供液电磁阀3、经济器4、节流阀5、蒸发器6、气液分离器7、低压提升电磁阀8、手动膨胀阀9，所述螺杆压缩机1上端分别于冷凝器2和经济器4连接，所述冷凝器 2和经济器4连接，所述冷凝器2和经济器4之间设有闪蒸罐供液电磁阀3，所述螺杆压缩机1下端与气液分离器7连接，所述气液分离器7与蒸发器6上端连接，所述蒸发器6下端与经济器4连接，所述蒸发器6与经济器4之间设有节流阀5。Referring to Fig. 1 and Fig. 2, the embodiment of the utility model provides an air source screw cold water heat pump unit flash barrel low-pressure bypass device, which is characterized in that it includes a screw compressor 1, a condenser 2, and a flash tank liquid supply solenoid valve 3. Economizer 4, throttle valve 5, evaporator 6, gas-liquid separator 7, low pressure lifting solenoid valve 8, manual expansion valve 9, the upper end of the screw compressor 1 is connected to the condenser 2 and the economizer 4 respectively, The condenser 2 is connected to the economizer 4, a flash tank liquid supply electromagnetic valve 3 is arranged between the condenser 2 and the economizer 4, and the lower end of the screw compressor 1 is connected to the gas-liquid separator 7, and the The gas-liquid separator 7 is connected to the upper end of the evaporator 6 , the lower end of the evaporator 6 is connected to the economizer 4 , and a throttle valve 5 is arranged between the evaporator 6 and the economizer 4 .
所述螺杆压缩机1上端设有有补气口12和排气口13，所述螺杆压缩机1下端设有吸气口11，所述吸气口11与蒸发器6连接，所述补气口12一路通过低压提升电磁阀8连接螺杆压缩机1的吸气口11，另一路连接闪蒸罐经济器4。所述排气口13一路连接冷凝器2，另一路通过手动膨胀阀9连接蒸发器6。The upper end of the screw compressor 1 is provided with an air inlet 12 and an exhaust port 13, and the lower end of the screw compressor 1 is provided with an air inlet 11, and the air inlet 11 is connected with the evaporator 6, and the air inlet 12 One way is connected to the suction port 11 of the screw compressor 1 through the low-pressure lift solenoid valve 8 , and the other way is connected to the flash tank economizer 4 . One of the outlets 13 is connected to the condenser 2 , and the other is connected to the evaporator 6 through the manual expansion valve 9 .
所述补气口12的第一路设有用于检测螺杆压缩机1的吸气口11压力的第一压差传感器14。所述排气口13的第二路设有用于检测螺杆压缩机1的排气口 13压力第二压差传感器15。所述第一压差传感器14通过电信号与低压提升电磁阀8连接，第二压差传感器15与手动膨胀阀9连接。The first path of the air supplement port 12 is provided with a first differential pressure sensor 14 for detecting the pressure of the suction port 11 of the screw compressor 1 . The second path of the exhaust port 13 is provided with a second differential pressure sensor 15 for detecting the pressure of the exhaust port 13 of the screw compressor 1. The first differential pressure sensor 14 is connected to the low-pressure lift solenoid valve 8 through an electric signal, and the second differential pressure sensor 15 is connected to the manual expansion valve 9 .
本实用新型工作过程：The working process of the utility model:
本实用新型一种空气源螺杆冷水热泵机组闪蒸桶低压旁通装置在工作过程中，高温高压的气体由螺杆压缩机1的排气口13排出，制冷剂蒸汽进入冷凝器 2冷凝成液体后，从冷凝器2出口排出的液体分为两路，一路连接经济器4，在经济器4的盘管内过冷，然后经节流阀5节流降压进入蒸发器6，在蒸发器6中蒸发制冷，产生的蒸汽由螺杆压缩机1的吸入口11吸入；另一路经闪蒸罐供液电磁阀3节流到中间压力后，进入经济器4，在其中蒸发，使经济器4盘管内的高压制冷剂过冷，蒸发产生的蒸汽进入螺杆压缩机1的补气口12，继续被压缩，然后从螺杆压缩机1的排气口13排出。当螺杆压缩机1吸气压力过低时，打开低压提升电磁阀8，从螺杆压缩机1的补气口12处，引流部分中温中压的气态制冷剂到螺杆压缩机1的吸气口11，抬升吸气压力，使之恢复到压缩机允许允许范围内。当螺杆压缩机1排气压力过高时，打开手动膨胀阀9，旁通部分高温高压的制冷剂，经节流降压后进入蒸发器6的入口，降低压缩机的排气压力，制冷剂选择R1234yf环保制冷剂，其GWP＝4，ODP＝0，具有明显的环境优势。The utility model is an air source screw cold water heat pump unit flash barrel low-pressure bypass device. During the working process, the high-temperature and high-pressure gas is discharged from the exhaust port 13 of the screw compressor 1, and the refrigerant steam enters the condenser 2 and condenses into a liquid. , the liquid discharged from the outlet of the condenser 2 is divided into two paths, one path is connected to the economizer 4, and is supercooled in the coil of the economizer 4, and then enters the evaporator 6 through the throttling valve 5 to reduce the pressure, and in the evaporator 6 Evaporative refrigeration, the steam generated is sucked by the suction port 11 of the screw compressor 1; the other way is throttled to the intermediate pressure by the liquid supply solenoid valve 3 of the flash tank, and then enters the economizer 4, where it evaporates, so that the coil of the economizer 4 The high-pressure refrigerant is subcooled, and the steam produced by evaporation enters the air supply port 12 of the screw compressor 1, continues to be compressed, and then is discharged from the exhaust port 13 of the screw compressor 1. When the suction pressure of the screw compressor 1 is too low, open the low-pressure lifting solenoid valve 8, and drain part of the medium-temperature and medium-pressure gaseous refrigerant from the air supply port 12 of the screw compressor 1 to the suction port 11 of the screw compressor 1, Raise the suction pressure to bring it back to the allowable range of the compressor. When the exhaust pressure of the screw compressor 1 is too high, open the manual expansion valve 9 to bypass part of the high-temperature and high-pressure refrigerant. Choose R1234yf environmentally friendly refrigerant, its GWP=4, ODP=0, which has obvious environmental advantages.
以上所述仅为本实用新型的较佳实施例而已，并不用以限制本实用新型，凡在本实用新型的精神和原则之内所作的任何修改、等同替换或改进等，均应包含在本实用新型的保护范围之内。The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modification, equivalent replacement or improvement made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.
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| CN112066582A (en) * | 2020-08-13 | 2020-12-11 | 珠海格力电器股份有限公司 | Direct evaporation type magnetic suspension system and air conditioner with same |
| CN114526233A (en) * | 2022-03-02 | 2022-05-24 | 安徽理工大学 | Composite dry vacuum pump with roots rotor and screw rotor connected in series and use method |
| CN118882222A (en) * | 2024-09-29 | 2024-11-01 | 中国石油大学(华东) | A two-stage flash evaporation multi-stage heat recovery compression high-temperature heat pump system |
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2019
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| CN112066582B (en) * | 2020-08-13 | 2022-01-28 | 珠海格力电器股份有限公司 | Direct evaporation type magnetic suspension system and air conditioner with same |
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| CN118882222A (en) * | 2024-09-29 | 2024-11-01 | 中国石油大学(华东) | A two-stage flash evaporation multi-stage heat recovery compression high-temperature heat pump system |
| CN118882222B (en) * | 2024-09-29 | 2024-12-17 | 中国石油大学(华东) | Two-stage flash evaporation multi-stage regenerative compression high-temperature heat pump system |
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