CN204806738U - Big difference in temperature screw doublestage condenser air source heat pump unit heater - Google Patents

Big difference in temperature screw doublestage condenser air source heat pump unit heater Download PDF

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Publication number
CN204806738U
CN204806738U CN201520478724.7U CN201520478724U CN204806738U CN 204806738 U CN204806738 U CN 204806738U CN 201520478724 U CN201520478724 U CN 201520478724U CN 204806738 U CN204806738 U CN 204806738U
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China
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condenser
air source
heat pump
compressor
compressed air
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CN201520478724.7U
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郭卫强
田琦
赵晓刚
黎珍
董旭
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Shanxi Hengxing Ruibang Heat Supply Co Ltd
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Shanxi Hengxing Ruibang Heat Supply Co Ltd
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Abstract

The utility model provides a compressed air source heat pump set and the 2nd compressed air source heat pump set constitute through first condenser one end and second condenser one end intercommunication respectively that big difference in temperature screw doublestage condenser air source heat pump unit heater be by two sets the same, compressed air source heat pump set is that the entry intercommunication of compressor has evaporimeter and shwoot steam separator, export intercommunication to have the condenser, shwoot steam separator's import intercommunication has expansion valve I, export intercommunication to have expansion valve II and compressor to constitute. One set or open two sets is opened to these two sets of unit heaters, saves the working costs, improves the unit performance, and when two sets of systems moved simultaneously, every set of system provided cooling water temperature rise and be 10 DEG C, compares one set of system and provides cooling water temperature rise 20 DEG C, and the working costs hangs down, and is efficient.

Description

Large temperature difference screw two-stage condensation device air source heat pump heating unit
Technical field
The present invention relates to a kind of air source heat pump heating system, especially a kind of large temperature difference screw two-stage condensation device air source heat pump heating unit for heat supply in winter.
Background technology
Municipal pollution is more and more serious, particularly North City heat supply in winter, and the heating of extensive use coal-burning boiler causes severe environmental pollution.In order to address this problem, adopt gas fired-boiler and heat pump heating technology, eliminate coal-burning boiler heating system.But the heating cost of gas fired-boiler is more than the twice of coal-burning boiler, therefore develop the inexorable trend that heat pump heating technology is resident's heat supply in winter.
Air source heat pump is as the Novel heating mode of a kind of flexible arrangement, easy and simple to handle, energy-conserving and environment-protective, a large amount of for various heating place.Air source heat pump heating system energy-saving environmental protection safety.Under rated condition, normal air source heat pump, under consumption 1kw power condition, just can provide the efficient heat of more than 3kw for heating floor heating water.The not direct combustion gas of air source heat pump system, also can not reveal pernicious gas, environmental safety is all better relative to the form of general gas floor heating.Air source heat pump Radiant Floor Heating System initial cost 180 ~ 240 yuan/m 2relatively high, but 15 ~ 18 yuan/m 2operating cost is 50% ~ 75% of central heating, is recoverable whole initial cost between the operating period, economic environmental protection.
The direct Radiant Floor Heating System of air-source is anhydrous systems, cannot be applicable to the steam generator system after removing.Compressor at present for air-cooled heat pump mainly contains piston type, vortex, screw three kinds of forms.According to the feature of heat pump work, the situations such as long operational time compression ratio is large, vortex and screw compressor will become the main flow of heat pump compressor.Air-source screw compressor hot-water heating system is now widely used, but is only applicable to minisystem, is not suitable for large scale system.Air-source centrifugal compressor hot-water heating system heating radius large heat loss is comparatively large, and general thermal source utilizes more near better, so centrifugal less.Air-source helical-lobe compressor hot-water heating system is applicable to provide heating to a building, and heating scale is moderate, and unit can be positioned over roof entire building centralized Control, and convenient management, development form is better.
Summary of the invention
Existing compressed air source hot pump system is generally twin-stage, when common Two-stage Compression air source heat pump runs in the winter time, when condensation temperature is constant, when outdoor environment temperature declines, along with the increase of inspiratory volume, pressure ratio increases, pressure at expulsion increases, and increases than merit, and refrigerating effect per unit swept volume reduces, unit heating capacity and coefficient of performance in heating all reduce, when outdoor environment temperature cannot work to less than subzero ten degrees Celsius.For addressing this problem, the utility model provides a kind of large temperature difference screw two-stage condensation device air source heat pump heating unit, and in the heat pump compressor of air screw source, adopt air injection enthalpy-increasing technology, and adopt as R404A cold-producing medium, heat pump normally works-25 DEG C time.
In order to solve the problem, the measure that the utility model is taked is as follows.
A kind of large temperature difference screw two-stage condensation device air source heat pump heating unit, comprises compressed air source hot pump unit and condenser thereof; It is characterized in that: described compressed air source hot pump unit to be communicated with second condenser one end respectively by first condenser one end by identical the first compressed air source hot pump unit of two covers and the second compressed air source hot pump unit to form;
Described first condenser is arranged between the first expansion valve I and the first compressor; The first condenser other end is communicated with interior radiator or grounding heat coil tube return pipe;
Described second cool condenser is arranged between the second expansion valve I and the second compressor; The second condenser other end is communicated with interior radiator or the return pipe of grounding heat coil tube backwater after the first condenser countercurrent flow temperature rise simultaneously;
Described first compressed air source hot pump unit is that the entrance of the first compressor is communicated with the first evaporimeter and the first flash steam separator, outlet have the first condenser; The inlet communication of described first flash steam separator has the first expansion valve I, outlet has the first expansion valve II and the first compressor;
Described second compressed air source hot pump unit is that the entrance of the second compressor is communicated with the second evaporimeter and the second flash steam separator, outlet have the second condenser; The inlet communication of described second flash steam separator has the second expansion valve I, outlet has the second expansion valve II and the second compressor.
Further, additional technical feature is as follows.
The heat transfer temperature difference of described first condenser and the second condenser is 10 DEG C.
The compressor of described first compressed air source hot pump unit and the compressor of the second compressed air source hot pump unit are screw compressors.
It is that set of system is run that the first identical compressed air source hot pump unit of described two cover is communicated with second condenser one end the heating system formed respectively by first condenser one end with the second compressed air source hot pump unit, or two cover systems run simultaneously.
During described net for air-source heat pump units employing air injection enthalpy-increasing, its heat pump normally works-25 DEG C time.
The realization of the utility model technique scheme, be particularly useful for the heating system after boiler improvement, just cold phase and end phase of trembling with fear only open first set source pump, freeze-up opens two cover source pump simultaneously, be convenient to carry out quality regulate, while meeting heating demands, also cost savings operating cost, further increase the performance of unit, and two cover systems when simultaneously running, every cover system provides cooling water temperature rise only to need 10 DEG C, compare and provide cooling water temperature rise 20 DEG C by set of system, operating cost reduces and loses little to unit performance, efficiency is high, especially when outdoor temperature is very low.
Accompanying drawing explanation
Fig. 1 is the overall structure figure of this heating unit.
In figure: 1: the first evaporimeter; 2: the first compressors; 3: the first condensers; 4: the first expansion valves I; 5: the first shwoot vapour separators; 6: the first expansion valves II; 7: the second evaporimeters; 8: the second compressors; 9: the second condensers; 10: the second expansion valves I; 11: the second shwoot vapour separators; 12: the second expansion valves II.
Detailed description of the invention
Below detailed description of the invention of the present utility model is made further instructions.
As shown in Figure 1, implement a kind of large temperature difference screw two-stage condensation device air source heat pump heating unit, this system is made up of two cover single stage compress net for air-source heat pump units, all adopts air injection enthalpy-increasing technology heat pump normally to work-25 DEG C time.The condenser countercurrent flow that when cold phase and the end phase of trembling with fear only have first set source pump to run originally, interior radiator or floor heating backwater flow through first set source pump heats up 10 DEG C, then the condenser flowed through in the second cover net for air-source heat pump units of not opening flows into the water supply of indoor as interior radiator or floor heating.When freeze-up two cover system is opened simultaneously, the condenser countercurrent flow that interior radiator or floor heating backwater first flow through first set source pump heats up 10 DEG C, the condenser countercurrent flow flowing through the second cover source pump again heats up 10 DEG C, altogether temperature rise 20 DEG C, flows into the indoor water supply as interior radiator or floor heating.
First set single stage compress net for air-source heat pump units comprises the first compressor 2, first condenser 3, first shwoot vapour separator 5, first expansion valve I 4, first expansion valve II 6, first evaporimeter 1 outlet is connected with the first compressor 2 entrance, first flash steam separator 5 upper outlet is connected with the first compressor 2 entrance, first compressor 2 outlet is connected with the first condenser 3 entrance, first condenser 3 outlet is connected with the first expansion valve I 4 entrance, first expansion valve I 4 outlet is connected with the first shwoot vapour separator 5 entrance, first shwoot vapour separator 5 lower end outlet is connected with the first expansion valve II 6 entrance, first expansion valve II 6 outlet is connected with the first evaporimeter 1 entrance.During unit operation, cooling water normally heats up 10 DEG C through condenser heat exchange.Second cover single stage compress net for air-source heat pump units comprises the second compressor 8, second condenser 9, second shwoot vapour separator 11, second expansion valve I 10, second expansion valve II 12, second evaporimeter 7, second evaporimeter 7 outlet is connected with the second compressor 8 entrance, second flash steam separator 11 upper outlet is connected with the second compressor 8 entrance, second compressor 8 outlet is connected with the second condenser 9 entrance, second condenser 9 outlet is connected with the second expansion valve I 10 entrance, second expansion valve I 10 outlet is connected with the second shwoot vapour separator 11 entrance, second shwoot vapour separator 11 lower end outlet is connected with the second expansion valve II 12 entrance, second expansion valve II 12 outlet is connected with the second evaporimeter 7 entrance.During unit operation, cooling water normally heats up 10 DEG C through condenser heat exchange.Just cold phase and the end phase of trembling with fear opens first set unit cooling water temperature rise 10 DEG C, and freeze-up opens two cover unit cooling water temperature rise totally 20 DEG C simultaneously, all meets heat demand.
The utility model is meeting on Heating Load basis, for solving the problem that when air source heat pump heats in the winter time, the disposable lifting of cooling water temperature rise is large, be particularly useful for the heating system after boiler improvement, there is provided one to consider and maintain low operating cost level, raising system heating protection and comfort, ensure unit service life Appropriate application air can energy-conserving and environment-protective heating system.This system is made up of two cover net for air-source heat pump units, and two covers are single stage compress net for air-source heat pump units, all adopts air injection enthalpy-increasing technology heat pump normally to work-25 DEG C time.The condenser heat exchange that interior radiator or floor heating backwater first flow through first set source pump heats up 10 DEG C, then the condenser heat exchange flowing through the second cover source pump heats up 10 DEG C.Just cold phase and end phase of trembling with fear only open first set source pump, and freeze-up opens two cover source pump simultaneously, is convenient to quality regulate runing adjustment, saves operating cost, improves unit performance, meets heating demands.

Claims (5)

1. a large temperature difference screw two-stage condensation device air source heat pump heating unit, comprises compressed air source hot pump unit and condenser thereof; It is characterized in that: described compressed air source hot pump unit to be communicated with the second condenser [9] one end respectively by the first condenser [3] one end by identical the first compressed air source hot pump unit of two covers and the second compressed air source hot pump unit to form;
Described first condenser [3] is arranged between the first expansion valve I [4] and the first compressor [2]; First condenser [3] other end is communicated with interior radiator or grounding heat coil tube return pipe;
Described second cool condenser [9] is arranged between the second expansion valve I [10] and the second compressor [8]; Second condenser [9] other end is communicated with interior radiator or the return pipe of grounding heat coil tube backwater after the first condenser [3] countercurrent flow temperature rise simultaneously;
Described first compressed air source hot pump unit is that the entrance of the first compressor [2] is communicated with the first evaporimeter [1] and the first flash steam separator [5], outlet have the first condenser [3]; The inlet communication of described first flash steam separator [5] has the first expansion valve I [4], outlet has the first expansion valve II [6] and the first compressor [2];
Described second compressed air source hot pump unit is that the entrance of the second compressor [8] is communicated with the second evaporimeter [7] and the second flash steam separator [11], outlet have the second condenser [9]; The inlet communication of described second flash steam separator [11] has the second expansion valve I [10], outlet has the second expansion valve II [12] and the second compressor [8].
2. large temperature difference screw two-stage condensation device air source heat pump heating unit as claimed in claim 1, is characterized in that: described first condenser [3] is 10 DEG C with the heat transfer temperature difference of the second condenser [9].
3. large temperature difference screw two-stage condensation device air source heat pump heating unit as claimed in claim 1, is characterized in that: the compressor [2] of described first compressed air source hot pump unit and the compressor [8] of the second compressed air source hot pump unit are screw compressors.
4. large temperature difference screw two-stage condensation device air source heat pump heating unit as claimed in claim 1, it is characterized in that: it is that set of system is run that the first identical compressed air source hot pump unit of described two cover is communicated with the second condenser [9] one end the heating system formed respectively by the first condenser [3] one end with the second compressed air source hot pump unit, or two cover systems run simultaneously.
5. large temperature difference screw two-stage condensation device air source heat pump heating unit as claimed in claim 1, is characterized in that: during described net for air-source heat pump units employing air injection enthalpy-increasing, its heat pump normally works-25 DEG C time.
CN201520478724.7U 2015-07-06 2015-07-06 Big difference in temperature screw doublestage condenser air source heat pump unit heater Active CN204806738U (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106642446A (en) * 2016-10-08 2017-05-10 黄国和 Threaded-rod and centrifugal water vapor energy heat pump system for conducting heating under ultralow temperature environment
CN107101372A (en) * 2017-06-06 2017-08-29 广州泉能智能科技股份有限公司 A kind of two grades of air-source carries hot type heat pump high-temperature hot-air unit
CN107477654A (en) * 2017-09-13 2017-12-15 韩德洪 A kind of air energy heating cycle system
CN107477653A (en) * 2017-09-13 2017-12-15 韩德洪 A kind of air energy heat supply energy-saving control system
CN107763891A (en) * 2017-10-16 2018-03-06 清华大学 A kind of air circulation compression net for air-source heat pump units
CN107917549A (en) * 2017-12-23 2018-04-17 田铭 Air injection enthalpy-increasing air energy twin-stage heating heat pump type air conditioning system
CN110332584A (en) * 2019-07-02 2019-10-15 北京工业大学 The heat pipe-type heating plant of multiple compressor parallels

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106642446A (en) * 2016-10-08 2017-05-10 黄国和 Threaded-rod and centrifugal water vapor energy heat pump system for conducting heating under ultralow temperature environment
CN107101372A (en) * 2017-06-06 2017-08-29 广州泉能智能科技股份有限公司 A kind of two grades of air-source carries hot type heat pump high-temperature hot-air unit
CN107477654A (en) * 2017-09-13 2017-12-15 韩德洪 A kind of air energy heating cycle system
CN107477653A (en) * 2017-09-13 2017-12-15 韩德洪 A kind of air energy heat supply energy-saving control system
CN107763891A (en) * 2017-10-16 2018-03-06 清华大学 A kind of air circulation compression net for air-source heat pump units
CN107917549A (en) * 2017-12-23 2018-04-17 田铭 Air injection enthalpy-increasing air energy twin-stage heating heat pump type air conditioning system
CN110332584A (en) * 2019-07-02 2019-10-15 北京工业大学 The heat pipe-type heating plant of multiple compressor parallels

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