CN103105015A - Energy-saving type double-evaporator two-stage compression refrigerating equipment used for floor radiant cooling - Google Patents

Energy-saving type double-evaporator two-stage compression refrigerating equipment used for floor radiant cooling Download PDF

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Publication number
CN103105015A
CN103105015A CN2013100728796A CN201310072879A CN103105015A CN 103105015 A CN103105015 A CN 103105015A CN 2013100728796 A CN2013100728796 A CN 2013100728796A CN 201310072879 A CN201310072879 A CN 201310072879A CN 103105015 A CN103105015 A CN 103105015A
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China
Prior art keywords
evaporator
temperature
floor
floor radiant
compressor
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Pending
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CN2013100728796A
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Chinese (zh)
Inventor
高理福
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Southwest Jiaotong University
Southwest University of Science and Technology
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Southwest University of Science and Technology
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Priority to CN2013100728796A priority Critical patent/CN103105015A/en
Publication of CN103105015A publication Critical patent/CN103105015A/en
Pending legal-status Critical Current

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Abstract

The invention discloses an energy-saving type double-evaporator two-stage compression refrigerating equipment used for floor radiant cooling, which comprises a compressor, elastic joints, control valves, an oil exit pipe, an oil separator, air bleed valves, a condenser, condenser cooling circuits, an accumulator, an accumulator liquid outlet, a high temperature expansion valve, a three-way control valve, filters, a high-temperature evaporator, high temperature cold water circuits, a low-temperature expansion valve, a low-temperature evaporator, a low-temperature cold water circuits and connecting pipelines. The compressor is equipped with a middle air-bleed centrifuge or screw, the three-way control valve is used for controlling the refrigerant flow distribution, the high-temperature evaporator provides a heat source of floor radiant cooing, the low-temperature evaporator is used for providing a heat source of floor air supply. And thus independent temperature and humidity control can be realized by combining a matched floor radiant system and the energy-saving type double-evaporator two-stage compression refrigerating equipment used for floor radiant cooling.

Description

The energy-saving dual evaporator two-stage compression refrigerating apparatus that is used for floor radiant cooling
Technical field
The present invention relates to a kind of energy-saving type refrigerating device, particularly can realize the refrigerating plant of terrestrial surface radiation cooling (warming up).
Background technology
At present, the refrigeration system of conventional air-conditioning system generally adopts the single stage compress kind of refrigeration cycle, provides the refrigerating medium of 7/12 ℃ to be used for the refrigeration of conventional air-conditioning system.There are 3 deficiencies in this system: 1. single stage compress refrigeration is with respect to two stages of compression its energy consumption relatively high (approximately high by 8~10%) of freezing; 2. this system generally is used for warm and humidly jointly controlling indoor by end (fan coil or air diffuser) according to the heat moisture ratio line of load, and when indoor sensible heat load and latent heat load did not mate, system energy consumption was high; 3. the single evaporator temperature can not be used for comfort level and sanitary condition floor radiant cooling (warm up) system preferably, like this, needs to install in addition end when using the room summer cooling of Radiant Floor Heating System, increases and invests and take floor height.
Have at present document (without patent) to illustrate and adopt first compression, electric expansion valve double evaporators refrigerating plant independently to control for the air-conditioning humiture, this device is due to first compression refrigeration that adopts, and its energy consumption is high than two stages of compression; Electric expansion valve intercropping flow control valve can be difficult to realize ideal adjusting because of not mating of flow, pressure, causes simultaneously the device job insecurity, the frequent adjusting of electric expansion valve, and its parts easily damage; The supporting end of this device is fan coil and floor radiant system, invests larger.
Summary of the invention
The present invention is intended to design a kind of energy-conservation refrigerating plant, can provide simultaneously two kinds of evaporating temperatures to be respectively used to floor cooling (eliminating the indoor section sensible heat) and dehumidifying (indoor section sensible heat and latent heat are controlled), can reach humiture independently controls, the flooring temperature is even, the purposes such as comfort is good, and sanitary condition is good.Than traditional single stage compress refrigerated energy-saving 8~10%.
technical scheme of the present invention is: a kind of energy-saving dual evaporator two-stage compression refrigerating apparatus for floor radiant cooling, comprise compressor 1, flexible coupling 2, by-pass valve control 3, oil exit pipe 4, oil eliminator 5, vent valve 6, condenser 7 condenser cooling circuits 8 and 9, reservoir 10, reservoir leakage fluid dram 11, high temperature expansion valve 12, three-way control valve 13, filter 14, high-temperature evaporator 15, high temperature cold water loop 16 and 17, low-temperature expansion valve 18, cryogenic vaporizer 19, cryogenic freezing water loop 20 and 21 and connecting line, cold-producing medium forms, it is characterized in that: compressor 1 is the centrifugal or helical-lobe compressor of bleeding in the middle of band, three-way control valve 13 is used for controlling flow distribution of refrigerant, high-temperature evaporator 15 provides the floor radiant cooling thermal source, cryogenic vaporizer 18 is used for providing the floor blowing thermal source.
During use, high pressure liquid refrigerant (pressure is P1) from condenser 7 at first passes through high temperature expansion valve 12, pressure is reduced to P2, flow through and be divided into two-way after three-way control valve 13. the one tunnel depresses evaporation through high-temperature evaporator 15 waiting, and gaseous refrigerant (pressure is P2) enters compressor 1 by connecting line; Flow through low-temperature expansion valve 18 of another road continues step-downs, and cold-producing medium is reduced to P3 in the low-temperature expansion downstream pressure, enters cryogenic vaporizer 19, becomes gaseous state and enter compressor after cryogenic vaporizer 19 evaporations, is compressed to P3 through one-level +, then mix in compressor with the cold-producing medium that from high-temperature evaporator pressure is P2, after mixing, pressure is P4, then enters condenser through two-stage compression to pressure P 1 and be condensed, and completes a kind of refrigeration cycle.Due to high-temperature evaporator having been arranged, namely reduced the refrigerant flow of a stage compressor, reduce again steam temperature and the specific volume of split-compressor import, thereby reduced the power consumption of compressor.
High temperature cold water (being generally 18~20 ℃) from high-temperature evaporator obtains can be directly used in floor radiant cooling, partially or completely eliminates room sensible heat (according to the size of room sensible heat load).
The chilled water (being generally 5~7 ℃) that obtains from cryogenic vaporizer is used for floor air supply system, send into the saturated air that obtains 16~18 ℃ after indoor-outdoor air freeze drying indoor, form one deck lake of cold air in the flooring, this air lake can prevent the ground dewfall, can carry out the wet exchange of Hot with room air again, reach the purpose of dehumidifying and elimination part sensible heat.
In this kind of refrigeration cycle, pressure P 2 is intermediate pressure, as long as determine suitable intermediate pressure, just can obtain good economic benefit.This device uses together with floor radiant system and floor air supply system, can reach with a cover system to solve summer cooling and heat supply in winter purpose.Eliminated the needed secondary furred ceiling of fan coil has been installed summer, taken the disadvantage of indoor floor height.Comfort level and the sanitary condition of heating, refrigeration can be improved.
Description of drawings
Be described further below in conjunction with drawings and embodiments.Figure of description is one embodiment of the present of invention.Fig. 1 is double evaporators refrigerating plant schematic diagram; Fig. 2 Fig. 3 is double evaporators refrigerating plant system diagram; Fig. 4 double evaporators refrigerating plant device external interface figure; Fig. 5 is that system installs and uses figure.in figure, 1 is compressor, 2 are flexible coupling, 3 is by-pass valve control, 4 is oil exit pipe, 5 is oil eliminator, 6 is vent valve, 7 is condenser, 8 and 9 is the condenser cooling circuit, 10 is reservoir, 11 is the reservoir leakage fluid dram, 12 is high temperature expansion valve, 13 is three-way control valve, 14 is filter, 15 is high-temperature evaporator, 16 and 17 is the high temperature cold water loop, 18 is the low-temperature expansion valve, 19 is cryogenic vaporizer, 20 and 21 is the cryogenic freezing water loop, 22 is indoor set, 23 is indoor return air inlet, 24 is fresh wind port, 25 is air outlet of indoor set, 26 is the floor blowing airduct, 27 is each room air outlet, 28 is the floor radiant system water collecting and diversifying device, 29 is the floor radiant system coil pipe.
The specific embodiment
A kind of energy-saving dual evaporator two-stage compression refrigerating apparatus for floor radiant cooling, it coordinates with floor radiant system can realize that humiture independently controls.it comprises compressor 1, flexible coupling 2, by-pass valve control 3, oil exit pipe 4, oil eliminator 5, vent valve 6, condenser cold 7, condenser cooling circuit 8 and 9, reservoir 10, reservoir leakage fluid dram 11, high temperature expansion valve 12, three-way control valve 13, filter 14, high-temperature evaporator 15, high temperature cold water loop 16 and 17, low-temperature expansion valve 18, cryogenic vaporizer 19, cryogenic freezing water loop 20 and 21, and the indoor set 22 of the floor radiant system supporting with it, indoor return air inlet 23, fresh wind port 24, air outlet of indoor set 25, floor blowing airduct 26, each room air outlet 27, floor radiant system divides (collection) hydrophone 28, floor radiant system coil pipe 29.
During use, high pressure liquid refrigerant (pressure is P1) from condenser at first passes through high temperature expansion valve, pressure is reduced to P2, is divided into two-way after the three-way control valve of flowing through. and one the tunnel depresses evaporation through high-temperature evaporator waiting, and gaseous refrigerant (pressure is P2) enters compressor by connecting line; Another road low-temperature expansion valve of flowing through continues step-down, and cold-producing medium is reduced to P3 in the low-temperature expansion downstream pressure, enters cryogenic vaporizer, becomes gaseous state and enter compressor after the cryogenic vaporizer evaporation, is compressed to P3 through one-level +, then mix in compressor with the cold-producing medium that from high-temperature evaporator pressure is P2, after mixing, pressure is P4, then enters condenser through two-stage compression to pressure P 1 and be condensed, and completes a kind of refrigeration cycle..High-temperature evaporator provides 17~20 ℃ of cold water directly to supply floor radiant system by the high temperature cold water loop, and for reducing the indoor room temperature, the adjusting of its supply water temperature can be regulated by three-way control valve.Cryogenic vaporizer can pass through in the direct cooling chamber of air outlet of indoor set or outdoor air, 16~18 ℃ of cold airs are provided, the airduct that cold air is layed in ground, room arrives each room air outlet and sends into each room, be used for the room humidity regulation and replenish and reduce indoor sensible heat, room air can enter cryogenic vaporizer by fresh wind port and process by indoor return air inlet, outdoor new wind; For the Large Central Air Conditioning System system, can provide 5~7 ℃ of chilled water air supplies to process unit for the treatment of indoor-outdoor air by cryogenic vaporizer.Cryogenic vaporizer is connected with indoor temperature, humidity controller respectively, controls the work of cryogenic vaporizer by the indoor temperature and humidity controller.
The thermal insulation layer of floor radiant system is if the insulation bed course is the height in assurance air channel, and cushion thickness is 70~80mm, and the last ground level that survives is the 100mm left and right.(as shown)
The thermal insulation layer of floor radiant system also can adopt air as thermal insulation layer, need this moment to set up keel on ground, lay lumber core on keel, lay loop and surface layer on lumber core, at this moment, can cancel airduct, utilize Stilt layer to make the static pressure layer, only need to lay the air port in each room, provide cold air to be used for dehumidifying and cooling to the room.
For central air conditioner system, the cryogenic vaporizer of available this device provides the chilled water of 5~7 ℃, offer in the new blower fan group of each subregion or air-conditioning unit process chamber or outdoor air by the cryogenic freezing water loop, air after processing is sent into floor blower tube (when thermal insulation layer is heat-insulation layer) or floor static pressure layer (when thermal insulation layer is air) equally, arrives each room by each room air outlet.
This device end adopt the main purpose of floor blowing be allow process after air can form on ground, room a layer of air lake when entering the room from the bottom, room, the air lake of low temperature can completely cut off the Hot wet air heating on top, room, reduce the dew-point temperature on ground, Antidewing, the comfort in room also can increase, and human body does not have the sensation of blowing.Top, room does not need to establish air diffuser or fan coil again simultaneously.Namely a cover end solves heat supply in winter and summer refrigeration simultaneously, reduces system cost and takies floor height.
Come adjusting refrigerant flow rate to distribute by the three-way control valve of regulating this device, can realize room liter (falling) temperature, the functions such as dehumidifying according to room humiture situation like this.

Claims (1)

1. energy-saving dual evaporator two-stage compression refrigerating apparatus that is used for floor radiant cooling, comprise compressor (1), flexible coupling (2), by-pass valve control (3), oil exit pipe (4), oil eliminator (5), vent valve (6), condenser (7), condenser cooling circuit (8) and (9), reservoir (10), reservoir leakage fluid dram (11), high temperature expansion valve (12), three-way control valve (13), filter (14), high-temperature evaporator (15), high temperature cold water loop (16) and (17), low-temperature expansion valve (18), cryogenic vaporizer (19), cryogenic freezing water loop (20) and (21) and connecting line, cold-producing medium forms, it is characterized in that: compressor (1) is the centrifugal or helical-lobe compressor of bleeding in the middle of band, three-way control valve (13) is used for controlling flow distribution of refrigerant, high-temperature evaporator (15) provides the floor radiant cooling thermal source, cryogenic vaporizer (18) is used for providing the floor blowing thermal source.
CN2013100728796A 2013-03-07 2013-03-07 Energy-saving type double-evaporator two-stage compression refrigerating equipment used for floor radiant cooling Pending CN103105015A (en)

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CN2013100728796A CN103105015A (en) 2013-03-07 2013-03-07 Energy-saving type double-evaporator two-stage compression refrigerating equipment used for floor radiant cooling

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104165487A (en) * 2014-07-31 2014-11-26 上海理工大学 Independent-control refrigeration and dehumidification device and method
CN104534578A (en) * 2014-12-26 2015-04-22 东南大学 Induced draught and radiation integrated air conditioning device with single water chilling unit

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100830663B1 (en) * 2007-06-26 2008-05-20 범양공조산업 주식회사 Air conditioning device for highstories of a building
CN101182946A (en) * 2007-11-27 2008-05-21 西安工程大学 Replacement ventilation and radiation cold/heat feeding composite air conditioner system
CN201203218Y (en) * 2008-04-03 2009-03-04 东南大学 Multiple-refrigerated water temperature heat and wet individual processing air conditioner device
JP2009186033A (en) * 2008-02-01 2009-08-20 Daikin Ind Ltd Two-stage compression type refrigerating device
CN201532046U (en) * 2009-10-19 2010-07-21 上海朗诗建筑科技有限公司 Cold-hot water unit of dual-operation heat pump for parallel-connected type evaporator
CN202066139U (en) * 2011-04-07 2011-12-07 浙江理工大学 Dual temperature heat pipe constant temperature and humidity air conditioning unit
CN202109601U (en) * 2011-06-10 2012-01-11 东南大学 Heat and moisture sectional process air-conditioner device combining radiant cooling
CN202328574U (en) * 2011-07-25 2012-07-11 浙江大学 Air supply system of central air conditioner with two cooling coils

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100830663B1 (en) * 2007-06-26 2008-05-20 범양공조산업 주식회사 Air conditioning device for highstories of a building
CN101182946A (en) * 2007-11-27 2008-05-21 西安工程大学 Replacement ventilation and radiation cold/heat feeding composite air conditioner system
JP2009186033A (en) * 2008-02-01 2009-08-20 Daikin Ind Ltd Two-stage compression type refrigerating device
CN201203218Y (en) * 2008-04-03 2009-03-04 东南大学 Multiple-refrigerated water temperature heat and wet individual processing air conditioner device
CN201532046U (en) * 2009-10-19 2010-07-21 上海朗诗建筑科技有限公司 Cold-hot water unit of dual-operation heat pump for parallel-connected type evaporator
CN202066139U (en) * 2011-04-07 2011-12-07 浙江理工大学 Dual temperature heat pipe constant temperature and humidity air conditioning unit
CN202109601U (en) * 2011-06-10 2012-01-11 东南大学 Heat and moisture sectional process air-conditioner device combining radiant cooling
CN202328574U (en) * 2011-07-25 2012-07-11 浙江大学 Air supply system of central air conditioner with two cooling coils

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104165487A (en) * 2014-07-31 2014-11-26 上海理工大学 Independent-control refrigeration and dehumidification device and method
CN104534578A (en) * 2014-12-26 2015-04-22 东南大学 Induced draught and radiation integrated air conditioning device with single water chilling unit

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Application publication date: 20130515