CN202835900U - Energy-efficient flooded type air-cooled heat pump unit - Google Patents

Energy-efficient flooded type air-cooled heat pump unit Download PDF

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Publication number
CN202835900U
CN202835900U CN 201220497230 CN201220497230U CN202835900U CN 202835900 U CN202835900 U CN 202835900U CN 201220497230 CN201220497230 CN 201220497230 CN 201220497230 U CN201220497230 U CN 201220497230U CN 202835900 U CN202835900 U CN 202835900U
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compressor
air
pump unit
heat pump
heat exchanger
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CN 201220497230
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曾仲国
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KUNLIN FREEZING MACHINE (SHANGHAI) CO Ltd
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KUNLIN FREEZING MACHINE (SHANGHAI) CO Ltd
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Abstract

The utility model provides an energy-efficient flooded type air-cooled heat pump unit. A flooded type shell and tube heat exchanger is adopted for an evaporator, influences of the resistance of a four-way valve, a gas-liquid separator and the like are overcome, and therefore the refrigerating capacity and efficiency of the heat pump unit is improved, and the purpose of energy conservation of the heat pump unit is achieved. The energy-efficient flooded type air-cooled heat pump unit comprises seven parts including a compressor, the four-way valve, a finned heat exchanger arranged on an air-cooled side, an expansion valve, the flooded type shell and tube heat exchanger arranged on a water side, an electronic control system and the like; and accessories including an oil separator, the gas-liquid separator, a self balancing type liquid tank, a spraying oil return device, a hot-gas bypass solenoid device and the like, wherein the accessories enable the heat pump unit to operate safely. The flooded type shell and tube evaporator is provided with two refrigerant outlets, one of the refrigerant outlets is connected with the four-way valve to enable gaseous refrigerant to pass through the four-way valve and the gas-liquid separator and then return back to an air suction port of the compressor, and the other refrigerant outlet is connected with the air suction port of the compressor through a controllable valve so as to enable the gaseous refrigerant to pass through the controllable valve to return back to the air suction port of the compressor.

Description

High energy efficiency full-liquid type Air-Cooled Heat Pump Unit
Technical field
The utility model relates to central air-conditioning refrigeration system, relates in particular to the full-liquid type Air-Cooled Heat Pump Unit.
Background technology
Energy-conservation and green technology is subject to government and the common people's attention at home day by day, and the energy-saving and environmental-friendly refrigeration product has been current industry trend.But, aspect Worm type air-cooled source pump, the heat pump product of high energy efficiency is very rare, unit eer is generally between 2.6~2.8, its main cause is that its evaporation side adopts the dry type case tube heat exchanger, and because of its heat exchanger structure restriction, its heat exchange area utilization rate is low, cause evaporating temperature corresponding lower, make the unit efficiency be difficult to improve.And the full-liquid type case tube heat exchanger is immersed in the refrigerant because of its evaporation tube major part, and heat exchange efficiency is about 2~3 times of dry type heat exchanger, and the Effective Raise evaporating temperature.And the air-cooled heat pump product of employing full-liquid type heat exchanger, mainly exist following technological difficulties to be difficult to capture: the one, the air-cooled heat pump product must dispose the parts such as four-way change-over valve and gas-liquid separator, but the two has certain resistance, cause compressor volume decrease in efficiency, Energy Efficiency Ratio reduces, especially on the very responsive environment-friendly type R134a refrigerant impact of resistance more so; The 2nd,, full-liquid type unit coolant injection amount is all very large, but when heating condition, coolant quantity is more than needed very large, and refrigerant more than needed is difficult to balance, affects unit safety operation and heating effect; The 3rd, air-cooled heat pump producer generally utilizes the cross valve reverse cycle defrost, but heat exchanger has a large amount of liquid refrigerants, and the cross valve commutation time very easily produces the compressor liquid hammer, and refrigerant shifts in large quantities, and the unit operation fluctuation is very large.
The utility model content
The purpose of this utility model is to provide a kind of high energy efficiency full-liquid type Air-Cooled Heat Pump Unit, evaporimeter adopts the full-liquid type case tube heat exchanger, and the controllable valve of air-breathing bypass is installed, to overcome the drag effects such as cross valve, gas-liquid separator, and then refrigerating capacity and the efficient of raising source pump, reach the energy-conservation purpose of unit.
Be compressor, cross valve, the heat exchanger of air-cooled side, expansion valve, the water of realizing the high energy efficiency full-liquid type Air-Cooled Heat Pump Unit of described purpose, comprise being arranged in a coolant circulating system
Figure BDA00002195724600011
The full-liquid type case tube heat exchanger of side is characterized in, the refrigerant exit of described full-liquid type shell-tube evaporator has two, and a refrigerant exit is connected with described cross valve, so that gaseous coolant can be back to the compressor air suction mouth through cross valve, gas-liquid separator; Another refrigerant exit is connected with the compressor air suction mouth through controlled valve, so that gaseous coolant can be back to the compressor air suction mouth through this controlled valve.
Described high energy efficiency full-liquid type Air-Cooled Heat Pump Unit is characterized in, on the connecting line of expansion valve and full-liquid type case tube heat exchanger, draws adapter, and this takes over access self-balancing type receiver so that when heating refrigerant migration more than needed to this receiver.
Described high energy efficiency full-liquid type Air-Cooled Heat Pump Unit, wherein, the balanced type receiver can be stored the refrigerant more than 50% of described coolant circulating system at least.
Described high energy efficiency full-liquid type Air-Cooled Heat Pump Unit, wherein, between the feed liquor pipeline of the exhaust connection road of compressor and the described heat exchanger of air-cooled side, be communicated with by independent bypass line, and a magnetic valve should be set in this bypass line, the unlatching of this magnetic valve is controlled according to compressor air suction reflux temperature and environment temperature by electronic control system.
Described high energy efficiency full-liquid type Air-Cooled Heat Pump Unit is characterized in that the heat exchanger of air-cooled side is the aluminium finned heat exchanger.
In inventor's enforcement, owing to adopt the unit of aforementioned techniques scheme to improve 20% than common Air-Cooled Heat Pump Unit efficiency, security of operation is stable, can reduce energy resource consumption, has very high economic benefit and environmental benefit.
Description of drawings
Fig. 1 is the utility model high energy efficiency full-liquid type air-cooled heat pump block diagram.
The specific embodiment
With reference to Fig. 1, the below comprises heat exchanger, the expansion valve of the compressor that is arranged in a coolant circulating system, cross valve, air-cooled side, the full-liquid type case tube heat exchanger of water side to high energy efficiency full-liquid type Air-Cooled Heat Pump Unit, its operation principle is identical in fact with existing Air-Cooled Heat Pump Unit, and in conjunction with control system, be aided with the accessory that oil eliminator, gas-liquid separator, liquid reservoir, liquid-jet cooling device, injection oil return apparatus, hot gas bypass defrosting device etc. make unit safety operation, and air-breathing bypass electrical ball valve etc. improves the energy saver of unit operation efficiency.
What following embodiment was different from prior art is:
1. on the connecting line of electric expansion valve 13 and full-liquid type case tube heat exchanger 17, draw one and take over 30, its access balanced type receiver 15, the volume of receiver 15 is very large, can store at least the refrigerant 50% or more, so that the refrigerant that balance is had more than needed when heating;
2. the refrigerant exit of full-liquid type shell-tube evaporator 17 has two, and an outlet is connected with cross valve 4, and gaseous coolant is back to the compressor air suction mouth through cross valve 4, gas-liquid separator 17.Another outlet is connected with the air entry of compressor 1 through an electrical ball valve 18, and gaseous coolant can be back to the compressor air suction mouth through electrical ball valve 18.Under refrigerating state, the gaseous coolant of low area overheat directly is back to compressor 1 through electrical ball valve 18, can avoid the drag effects of cross valve 4 and gas-liquid separator 17, has improved compressor volume efficient, and then improves the unit efficiency.When converting heating condition to, this electrical ball valve 18 is closed, and unit normally heats.
3. unit adopts the hot gas bypass defrosting technology, namely between the feed liquor pipeline of the exhaust connection road of compressor 1 and finned coil heat exchanger 7, consist of bypass line 31, magnetic valve 5 is set on the bypass line 31, and the unlatching of magnetic valve 5 is controlled according to compressor air suction reflux temperature and environment temperature by electronic control system; When coil heat exchanger 7 surperficial frosting, the gaseous coolant bypass of HTHP to coil heat exchanger 7, can thoroughly be melted away frosting, the refrigerant that can avoid the cross valve reverse cycle defrost to bring again shifts in a large number, causes the liquid hammer of compressor 1.
Below just as shown in the figure the mode of operation of embodiment describe respectively.
Refrigeration mode
The flow direction of refrigerant is followed successively by compressor 1-oil eliminator 3-cross valve 4-aluminium finned heat exchanger 7-filter 9-check valve 10-device for drying and filtering 11-electric expansion valve 13-full-liquid type case tube heat exchanger 17-electrical ball valve 18-compressor 1 under the refrigeration mode, in addition, be back to compressor 1 from full-liquid type case tube heat exchanger small part refrigerant out through cross valve 4, gas-liquid separator 17.
After unit is opened under the refrigeration mode, the water pump of air conditioner operation, compressor 1 is opened, cross valve 4 outages, the oil return solenoid valve 22 of electrical ball valve 18 and oil eliminator 3 is switched on and is opened, and sprays oil return control magnetic valve 23 and 24 energising unlatchings, and other magnetic valves keep off-position.The cold media gas of HTHP is discharged from compressor 1, realize that by oil eliminator 3 lubricating oil separates with refrigerant along arrow 32, isolated lubricating oil is back to the suction line of compressor 1 by pipeline 33, pure gaseous coolant enters finned heat exchanger 7 through the C of cross valve 4 mouth, through being condensed into high-pressure sub-cooled liquid with the air exchange heat, and pass through successively filter 9, check valve 10, device for drying and filtering 11, electric expansion valve 13, become the gas-liquid mixture of low-temp low-pressure, enter full-liquid type heat exchanger 16 and produce idle call cold water, after refrigerant absorption water side heat becomes low area overheat gas, most of refrigerant is back to compressor 1 through electrical ball valve 18, and have the small part refrigerant to be back to compressor 1 through cross valve 4 and gas-liquid separator 17, so finish a refrigerant circulation process.Open period, electric expansion valve 13 have an initial opening, and run duration, electric expansion valve 13 calculate suction superheat by electronic controller according to suction temperature 26 and inspiratory pressure sensor 19 and carry out aperture control.Unit makes unit produce sustainedly and stably air conditioner cold water according to this circulation process stable operation.
Heating mode
The flow direction of refrigerant is followed successively by compressor 1-oil eliminator 3-cross valve 4-full-liquid type case tube heat exchanger 16-filter 9-check valve 10-device for drying and filtering 11-heating power expansion valve 8-filter 9-aluminium finned heat exchanger 7-cross valve 4-gas-liquid separator 17-compressor 1 under the heating mode.
After unit is opened under the heating mode, the water pump of air conditioner operation, electrical ball valve 18 energisings are closed, compressor 1 is opened, and cross valve 4 keeps outage, and oil return solenoid valve 22 energisings of oil eliminator 3 are opened, injection oil return control magnetic valve 23 and 24 outages are closed, other magnetic valves keep off-position, and after Compressor Discharge Pressure reached setting value, cross valve 4 got electric.The cold media gas of HTHP is discharged from compressor 1, realize that by oil eliminator 3 lubricating oil separates with refrigerant along arrow 34, isolated lubricating oil is back to the suction line of compressor 1 by pipeline 33, pure gaseous coolant enters full-liquid type heat exchanger 7 through the E of cross valve 4 mouth and produces air conditioning hot, gaseous coolant is through being condensed into high-pressure sub-cooled liquid with the exchange of hydro-thermal amount, and pass through successively filter 35, check valve 36, device for drying and filtering 11, heating power expansion valve 8, become the gas-liquid mixture of low-temp low-pressure, after entering finned copper pipe heat exchanger 7, after refrigerant absorbing air side heat becomes low area overheat gas, refrigerant is back to compressor 1 through cross valve 4 and gas-liquid separator 17, so finishes a refrigerant circulation process.Run duration, receiver 15 is in the environment of low temperature, refrigerant more than needed constantly migrates to (the receiver volume is enough large according to the design of coolant injection amount) in the receiver during heating, finally make unit stable operation under rational refrigerant circulation, make unit produce sustainedly and stably air conditioning hot.
During the heating operation, if unit is in the environment of low temperature and high relative humidity, make the very easily frosting of finned copper pipe heat exchanger 7 surfaces.The electronic controller of unit is according to the detected value of environment temperature and suction temperature sensor, judges the whether frosting of heat exchanger 7 surfaces.If judge frosting, magnetic valve 5 energisings that then defrost are opened, and the gaseous coolant bypass of HTHP melts rapidly surperficial frosting to finned copper pipe heat exchanger 7, because the refrigerant fluctuation of having avoided cross valve 4 reverse cycle defrosts to bring defrosts safely set steady.Judge that according to defrosting time and suction temperature value defrosting finishes, 5 outages of defrosting magnetic valve are closed.
Above-mentioned example is one of embodiment of the present utility model; in addition; the utility model can also otherwise be realized; such as electrical ball valve 18 replaceable one-tenth magnetic valves, manually-operated gate etc.; without departing from the concept of the premise utility, any apparent replacement or modification are all within protection domain of the present utility model.

Claims (5)

1. high energy efficiency full-liquid type Air-Cooled Heat Pump Unit, comprise heat exchanger, the expansion valve of the compressor that is arranged in a coolant circulating system, cross valve, air-cooled side, the full-liquid type case tube heat exchanger of water side, it is characterized in that, the refrigerant exit of described full-liquid type shell-tube evaporator has two, a refrigerant exit is connected with described cross valve, so that gaseous coolant can be back to the compressor air suction mouth through cross valve, gas-liquid separator; Another refrigerant exit is connected with the compressor air suction mouth through controlled valve, so that gaseous coolant can be back to the compressor air suction mouth through this controlled valve.
2. high energy efficiency full-liquid type Air-Cooled Heat Pump Unit as claimed in claim 1, it is characterized in that, on the connecting line of expansion valve and full-liquid type case tube heat exchanger, draw adapter, this takes over access self-balancing type receiver so that when heating refrigerant migration more than needed to this receiver.
3. high energy efficiency full-liquid type Air-Cooled Heat Pump Unit as claimed in claim 1 is characterized in that, the self-balancing type receiver can be stored the refrigerant more than 50% of described coolant circulating system at least.
4. high energy efficiency full-liquid type Air-Cooled Heat Pump Unit as claimed in claim 1, it is characterized in that, between the feed liquor pipeline of the exhaust connection road of compressor and the described heat exchanger of air-cooled side, be communicated with by independent bypass line, and a magnetic valve should be set in this bypass line, the unlatching of this magnetic valve is controlled according to compressor air suction reflux temperature and environment temperature by electronic control system.
5. high energy efficiency full-liquid type Air-Cooled Heat Pump Unit as claimed in claim 1 is characterized in that, the heat exchanger of air-cooled side is the aluminium finned heat exchanger.
CN 201220497230 2012-09-26 2012-09-26 Energy-efficient flooded type air-cooled heat pump unit Expired - Lifetime CN202835900U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103983040A (en) * 2014-04-14 2014-08-13 美意(浙江)空调设备有限公司 Water cooling and heating unit for air cooled heat pump
CN106016852A (en) * 2015-03-27 2016-10-12 富士电机株式会社 Refrigerant loop apparatus
CN109520170A (en) * 2018-11-28 2019-03-26 中原工学院 A kind of net for air-source heat pump units with twin-stage supercooling and liquid pulse defrosting function
CN111059761A (en) * 2018-10-17 2020-04-24 株式会社日本伊藤美珂 Heat pump water heater

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103983040A (en) * 2014-04-14 2014-08-13 美意(浙江)空调设备有限公司 Water cooling and heating unit for air cooled heat pump
CN103983040B (en) * 2014-04-14 2016-05-18 美意(浙江)空调设备有限公司 Air-cooled heat pump water chiller-heater units
CN106016852A (en) * 2015-03-27 2016-10-12 富士电机株式会社 Refrigerant loop apparatus
CN106016852B (en) * 2015-03-27 2018-08-31 富士电机株式会社 Refrigerant return device
CN111059761A (en) * 2018-10-17 2020-04-24 株式会社日本伊藤美珂 Heat pump water heater
CN109520170A (en) * 2018-11-28 2019-03-26 中原工学院 A kind of net for air-source heat pump units with twin-stage supercooling and liquid pulse defrosting function
CN109520170B (en) * 2018-11-28 2023-04-07 中原工学院 Air source heat pump unit with double-stage supercooling and liquid pulse defrosting functions

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Granted publication date: 20130327