CN103940161A - Method and device for defrosting through combination operation of multiple air heat source heat exchangers - Google Patents

Method and device for defrosting through combination operation of multiple air heat source heat exchangers Download PDF

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CN103940161A
CN103940161A CN201410208106.0A CN201410208106A CN103940161A CN 103940161 A CN103940161 A CN 103940161A CN 201410208106 A CN201410208106 A CN 201410208106A CN 103940161 A CN103940161 A CN 103940161A
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air heat
heat exchanger
heat
electronic valve
air
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CN103940161B (en
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陈友明
刘小江
徐雨淋
刘赟
肖文瑜
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Jiangsu Tong Sheng heat exchanger Co., Ltd
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HUNAN CHUANGHUA LOW-CARBON ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd
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Abstract

The invention provides a method and device for defrosting through combination operation of multiple air heat source heat exchangers. According to the method, the mode that defrosting is conducted on a heat exchange unit in turn is adopted, thermal fluids of a condenser of a main machine of a workstation are led into a unit body to be defrosted to conduct heat exchange with frost on a fin outside the heat exchanger of the unit body so as to remove the frost and melt the ice, the main machine does not need to be in a standby state, and the heating work of the main machine in the workstation can continue in the defrosting process. The defrosting process includes the specific steps that an electronic valve, connected with an evaporator in series, of an air heat exchanger to be defrosted is shut down, an electronic valve connected with the condenser in series is opened, and the thermal fluids from the condenser flow into the air heat exchanger to be defrosted to conduct defrosting. The invention further provides the device for defrosting through combination operation of the multiple air heat source heat exchangers. The method and device for defrosting through combination operation of the multiple air heat source heat exchangers are wide in applicable range, capable of achieving the purpose of controlling defrosting through maximum average heating load, and capable of saving energy sources and water sources and having great significance in easing environment pressure and eliminating hazes; a traditional heating mode by using a boiler can be abandoned truly.

Description

Defrosting method and the device of the through transport of a kind of many air heat sources heat exchanger
Technical field
The present invention relates to defrosting method and the device of the through transport of a kind of many air heat sources heat exchanger.
Background technology
Along with the continuous growth of the size of population and economic developing rapidly, aggravate consumption and the exhaustion of fossil energy, also brought more serious pollution and destruction to environment simultaneously.Recent years, environmental pollution is particularly serious, and many big and medium-sized cities take place frequently because winter heating causes haze weather, not only injure the healthy of city dweller, and affects crops and produce and cause the underproduction.For this reason, people are just to make great efforts greatly to find the outlet of the energy: the one, save the energy, and the 2nd, tap a new source of energy.Up to the present, power-saving technology taking the first law of thermodynamics as basis, is set about from the aspect of amount on the one hand, reduces various losses and waste; On the other hand, from the second law of thermodynamics, set about research from the aspect of matter, utilize low-phase energy (air, soil, water, solar energy, industrial waste heat etc.) to replace a part of high-order energy (coal, oil, electric energy), to save the high-order energy.Therefore, utilize the heat pump techniques of low-phase energy to attract people's attention.
The raising of expanding economy and living standards of the people has brought the prosperity of every profession and trade building; these industry buildings are built in populous region more; the whether economical rationality of the corollary equipment facility air conditioner of building, the energy resource structure that domestic hot-water selects; be directly connected to economy and environmental protection after every profession and trade operation;, not only increase operating cost and also directly or indirectly ecological environment has been caused to secondary pollution simultaneously if do not taked effective energy-conserving and environment-protective measure at development.
The energy resource structure of China's building mainly relies on fossil fuel, and fossil energy can produce NOx Aci-Jel dissolubility gas in combustion process, is haze arch-criminal, is also easy carcinogenic gas; In combustion process, also can produce sulfur dioxide (SO 2) gas, human body sucks SO 2after produce cough, expiratory dyspnea etc.SO 2also very easily be combined with vapor in the atmosphere and generate sulfurous acid, form smog acid rain, make water and soil acidifying, and the fossil fuel price rising steadily causes enterprise operation cost to increase, the secondary environment problem that a large amount of burning mineral fuels produce becomes the focus of world attention day by day.
The current shared GDP energy consumption of building energy consumption ratio is increasing, particularly air conditioner, domestic hot-water's installations and facilities in service industry's building, and its energy consumption scope can account for 30~55% of industry cost.Energy consumption height is originated with initial selected cold (heat) source, and whether cheapness has direct relation, and the environmental pollution bringing that heats of China's traditional fossil fuel is being challenged in energy-conservation and environmental protection.Therefore, seeking cheap low-grade renewable cold (heat) source is the key measure that reduces heat pump energy consumption cost, there is multiclass in source, heat pump low-grade renewable cold (heat) source, which class cold (heat) source is the most applicable most economical, also will suit measures to local conditions source, heat pump cold (heat) source to be optimized contrast from areal geology and weather conditions.
Because south China most areas is clammy winter, be subject to the impact of north and south warm and cold air face-off, there is nearly 800 hours temperature mostly to be between-5~6 DEG C, low temperature overcast and rainy day is unbroken, medial humidity reaches more than 85%, latent heat (humid air is met condensation frosting) source becomes the low-grade energy that heat pump is harmful, cause heat exchanger frosting, obstruct airflow is logical loses usefulness and frequent defrosting causes heat pump cisco unity malfunction, heating performance coefficient (COP) declines and only has 1.5 left and right, be aided with high-grade electric heat source high as auxiliary thermal source energy consumption thereupon, cannot adapt to normally operation under low temperature and high relative humidity weather conditions.Due to reasons such as costs, the poor Δ t=10-12 DEG C that exceedes of environment temperature and refrigeration machine working medium evaporating temperature.Particularly after commutation, become the very low following current heat exchange of efficiency winter, after throttling the cold pipe of cold-producing medium arrowband fin first passage just with the humid air frosting of meeting, obstruct airflow is led to heat exchange, greatly reduces heat pump operating efficiency.
Heat source tower heat pump is that energy-conservation advantage and the dry monsoon cold-heat pump part heat capacity of refrigeration machine evaporative cooling in summer perfectly organically combined, and effectively solved cannot be between-3~5 DEG C normal operation problem of southern air-cooled heat pump heat supply, cancel the auxiliary thermal source such as boiler, electric heating.
Existing heat source tower heat pump system equipment, heat source tower and source pump are according to outside air temperature-5~6 DEG C, the little temperature difference system in broadband designing under 85% above air humidity weather conditions.Heat source tower low-temperature circulating liquid directly or indirectly absorbs sensible heat and latent heat source from air provides low-grade energy for heat pump.Source heat pump heat source stable performance, heating performance coefficient (COP) raising reaches more than 3.0.In summer, heat source tower has the evaporation capacity that is greater than cooling tower, and Energy Efficiency Ratio (EER) can reach 4.5~5.5, can effectively realize 100% cold and heat recovery, and free life heating water and saving energy environmental protection is provided.
Adopt advanced defrost technology to turn harm into good, larger its latent heat content of air humidity is higher, its value is instead larger, especially be applicable to adopting closed type heat source tower to absorb low temperature environment latent heat energy, can be heat pump sufficient low-grade heat source is provided, heat pump efficiency is high, and heating performance coefficient can reach more than 3.5 (screw rod unit), and contrast fuel oil heating energy-saving consumption reduction reaches more than 50~60%.
Yangtze River in China basin and areas to the south's climate characteristic and meteorologic factor, be the intersection of the weak warm moist air of northern cold air and south, and the weather of a run of wet weather has accounted for the more than 85% of winter, and moist sombre weather is felt under the weather people.Operate in the following air-cooled heat pump frostings of 5 DEG C of environment temperatures serious, performance coefficient of heat pump low energy consumption is high, cannot ensure normal heat supply temperature, the substitute is the auxiliary and fossil fuel of electricity as Winter heat supply, and the high and contaminated environment of its energy consumption is perplexing this region.The popularization of earth source heat pump is subject to again the restriction of geographic location, again cannot be in dense urban district application.
Simpson Liu Qiu gram has researched and developed many moneys heat source tower technology, shows many advantages actual in applying process, develops into enclosed of today from past open type, several times easily changes, and has also obtained some markets accreditations, has summed up following technical characterictic content:
1, intermittently the accumulation of heat energy thermal medium demisler-phase of having a moderate climate utilizes source pump to holding heat energy apparatus accumulation of heat, adopts and intermittently stop fan operation under air negative temperature condition, the little temperature difference heat exchange coil of wide fin is carried out to the defrosting of built-in accumulation of heat energy.
2, absorb under the low-temperature heat source demisler-air negative temperature condition of source, ground and adopt intermittently and stop fan operation, the built-in cryogenic fluid of wide finned tube exchanger or external recirculated water and underground source tray pipe or underground water, surface water, used heat carry out defrosting.
3, under frost-proof solution honeycomb evaporation concentration device-air negative temperature condition, adopt intermittently and stop fan operation, the storage of micro-pouring macromolecule alcohols frost-proof solution, phase to be had a moderate climate or IMU are crossed honeycomb concentration evaporator in tower and are concentrated.
4, under intermittent shower anti-freezing solution demisler-air negative temperature condition, adopt and stop fan operation, micro-pouring macromolecule alcohols frost-proof solution, need to configure solution storage device and solution concentration monitoring device and counter-infiltration solution condensing device.
Above technical deficiency part is flow process complexity, must add enrichment facility, or other defrost auxiliary spraying device etc., just cost is not high for this, and chloride drift meeting affects surrounding enviroment, air side fins is had to certain corrosiveness, or stain fin and affect its heat transfer effect.The enclosed backheat defrost technology of its subsequent development; not only need to arrange heat-accumulator tank; in heat-accumulating process, more or less having heat energy dissipation situation occurs; the more important thing is that in defrost process main frame needs to shut down, this shutdown does not too frequently just affect main process equipment service life, and its seriousness is also the large good time waste that heats to fall; in the time that room needs heat; main frame, but in holding state, stops heating work, or also will ask for from room heat energy is used for defrost.The heat-exchange system of Hunan Chuanghua Low-carbon Environmental Protection Technology Co., Ltd.'s application; its number of patent application is: 201310710441.6 and number of patent application be: 201320848130.1; these two patent applications are the object that the additional open type defrost of enclosed circulation circulates to reach anti-condensation frosting and obtains air energy; although not existing, main frame shuts down and ideal case; but exist non freezing solution drift situation to occur; affect surrounding enviroment, equipment is also had to corrosiveness.
Little temperature difference heat exchange, its heat transfer area requires larger.In application in summer, need the outer spraying and sprinkling evaporation cooling reinforcing heat transfer process of water, need strictly evaporative cooling recirculated water to be carried out the integrated water processing of 10% by-pass flow scale inhibition, filtration, sterilizing bath; In the winter time in application, under surrounding air negative temperature condition, the technology of Liu Qiu gram adopts four kinds of frost prevention patterns all to need intermittently to stop closed type heat source tower fan operation to control the strong convection loss of frost-proof solution drift losses and heat energy, require closed type heat source tower configuration should consider modular arrangements, and have certain surplus to meet the lower four kinds of frost prevention mode requirement of air negative temperature condition.Tower heating pump complete device with solar energy secondary heat source is that traditional water cooling refrigeration+boiler and conventional air source heat pump+electric attached heat that south China is generally applied combine together, change the large different transfer of heat design configurations of its existing equipment poor efficiency, boiler and electric auxiliary heat and a large amount of soil source pipe layings are saved, air conditioner health hot water three alliances are realized, a machine three-use, has thoroughly changed traditional field of air conditioning 300-2000KW water cooling refrigeration machine and cannot realize the technical barrier of heat pump.Carbon reduction and comprehensive economic performance index, higher than the 30-60% of Xia Redong cryogenic region traditional air-conditioning system, are the renewable energy technologies that effectively utilizes the solar energy secondary energy.
The problem that compensation water resource heat pump occurs, in hot cold of northern China summer area, the deficient source heat pump heat deficiency of groundwater resources, heat source tower heat pump can utilize heat source tower to absorb the deficiency of compensation water source, solar energy secondary source source heat pump heat.In south China Xia Redong cryogenic region, cooling water inflow deficiency when groundwater resources freeze deficient summer, heat source tower heat pump can utilize heat source tower to realize the low-temperature receiver of the cooling compensation water resource heat pump of negative pressure evaporation.
Balance soil source heat pump, in hot cold of northern China summer area, soil source accumulation of heat deficiency, heat source tower heat pump can utilize the transition season absorption sun time source of students to carry out soil source compensation accumulation of heat, regulates the balance in soil source temperature field; Winter climate heat source tower heat pump miothermic absorbs solar energy secondary source independent heat supply, can effectively reduce soil source heat pump heat accumulation volume and floor space.In south China Xia Redong cryogenic region, the hot stack problem that heat source tower heat pump can utilize negative pressure evaporation chilled water modulation soil source temperature field, solar energy secondary source, realizes the stable operation of system.
Reducing China relies on fossil energy, Xia Redong cryogenic region on the south China Yangtze river basin, application heat source tower heat pump coordinates with conventional boiler heat supply, carries out carbon reduction transformation complementation utilization, can reduce heating period more than 90% or abandon the dependence to fossil energy completely.
The excessive area of and cold cold at northern China Huanghe valley Xia Redong, application heat source tower heat pump coordinates with conventional boiler heat supply, carries out carbon reduction transformation complementation utilization, can reduce more than 60% dependence to fossil energy of heating period.
In the Northeast of China and hot cold of North China summer area, application heat source tower heat pump coordinates with conventional boiler heat supplying air conditioning, carries out carbon reduction transformation complementation utilization, can reduce the dependence of heating period 30-40% to fossil energy.
Slow down global fossil energy consumption, heat source tower heat pump efficient absorption solar energy secondary source, can substitute fossil energy completely at low latitudes.Heat source tower heat pump multifunctional efficient, refrigeration negative pressure evaporation cooling water is energy-efficient, can improve tropical rainy climate refrigeration machine efficiency 30%; Can reduce fossil energy is relied at high latitude area heat source tower heat pump.
Utilize a small amount of high-grade electric energy as drive energy, from low-temperature heat source efficient absorption low grade heat energy and be transferred to high temperature heat source, reached the object of " pump heat ".Heat pump techniques is also a kind of technology that improves energy grade, and it is not the process of power conversion, is not subject to the restriction of the energy conversion efficiency limit 100%, but is subject to the restriction of contrary Carnot's cycle efficiency.Its efficiency COP refers to quantity of heat production and input electric energy relatively.Its theoretical efficiency is (operating temperature+273)/temperature rise △ T.When 25 DEG C of operating temperatures, when △ T is 20 DEG C, theoretical heating efficiency just can reach COP=15.But in the middle of reality, motor efficiency=0.95, compressor efficiency=0.8, heat exchanger efficiency=0.9, system effectiveness=0.8, gross efficiency is 0.95 × 0.8 × 0.9 × 0.8=0.55.COP reality=15 × 0.55=8.25.Drop in other words the electric energy of 1KW and carry heat energy, when 25 DEG C of operating temperatures, when △ T is 20 DEG C, the highest heat that can carry 8.25KW.
But different from the situation of air source heat pump manufacturing enterprise fast development, air source heat pump is unsatisfactory in the application feature of China.For a long time, the southern areas such as an air source heat pump Guangdong in China, Fujian, Zhejiang, Hunan, Jiangxi, Yunnan have obtained some application, and its situation of promoting at northern area is not fully up to expectations.To this, insider points out, under cold climate, is easy to occur the phenomenon of frosting on the unit coil pipe of air source heat pump, and this normal heat supply to whole net for air-source heat pump units is extremely unfavorable.Want to promote the application of air source heat pump at northern area, must solve in time net for air-source heat pump units coil pipe easy this problem of frosting under low temperature environment.But the defrost effect of several defrost technology that adopt in China's net for air-source heat pump units is at present not ideal greatly.
Data according to the large market of air conditioner refrigerating is understood, and the defrost technology adopting in air source heat pump at present mainly contains three kinds: the reverse defrost of cross valve, hot-gas bypass defrost, electrical heating defrost.With regard to applicable cases, utilize this technology of the reverse defrost of cross valve to carry out the product of defrost relatively many.Although the defrost effect of the reverse defrost of cross valve is better, while utilizing this kind of technology to carry out defrost, the compressor of air source heat pump stops heat supply, oppositely does refrigeration entry into service, therefore system heating load is obviously affected.Through relevant test, the heat loss causing while adopting this technology to carry out defrost accounts for 10.2% of air source heat pump total energy consumption loss.This defrost technology also easily causes " liquid hammer " simultaneously, very unfavorable to the normal use of compressor.
In addition, adopt the enterprise of this technology of hot-gas bypass defrost also many.Although the impact that this technology causes whole air source heat pump system is smaller, security is corresponding higher, and its maximum drawback is that the effect of defrost is thorough not.
For above two kinds of technology, the utility ratio of this technology of electrical heating defrost is lower.Although its actual defrost effect is ideal, adopt electrical heating defrost need to use electric heating tube, this increases the energy consumption of air source heat pump, and then its energy-conservation advantage has not been existed.In addition, the service life of electric heating tube is limited, and has the overheated possibility on fire that causes, and also has hidden danger aspect security.
Except above technology, there is very much the technology of new meaning although also proposed maximum average this class of heating load control defrost in some documents, these technology also rest on theoretical research stage at present mostly, and practical application example is little.So far also effectively do not solved just because of net for air-source heat pump units coil pipe easy this problem of frosting under low temperature environment, so the manufacturer of many air source heat pumps is all secretive for this problem of air source heat pump defrost poor effect.Because the air source heat pumps energy-saving that this phenomenon is external publicized with it, environmental protection, safety, image that can round-the-clock use are conflicting.
It is reported, the manufacturing enterprise of some air source heat pumps is making some progress aspect the defrost of air source heat pump at present, improved air source heat pump product can normally use under the environment of subzero 15 degrees Celsius, can adapt to the weather of most areas.But this is for the extremely northern area of severe cold in winter, also slightly inadequate, need further improvement.In a word, not ideal enough having become of defrost effect restricts the key factor that air source heat pump is promoted in China on a large scale, is also " weakness " that numerous manufacturing enterprise had to overcome.Especially China's part also rests on and utilizes nature fossil energy to do the main resource means of heating, this administers haze weather for China very bad impact, how we look for another way is gone to solve the problem of this heating needle-holding hand, is also to administer the problem that China's haze weather stands in the breach.
In fact, in air, itself just contains huge heat energy, especially the latent heat of steam also can not be despised, how we remove to develop air can, scientific worker has also done a large amount of trials, as heat source tower, application is not very extensive to the extensive air energy heat pump of addressing above, has its certain limitation, also has effect ideal so that uses at present commonplace family air energy heat pump.
We know that in air, thermal source is what many, and that is endlessly, are also inexhaustible.Just how we adopt the problem that very economical means drive airborne heat energy to shift to high temperature place, and this is a huge problem, is also the problem that is worth going into seriously.We also know that water in air vapour contains huge latent heat, even can account for more than 30% heat of whole air energy, the water in air that how to be used vapour latent heat, make it to turn bane into boon, this is to have very important significance, and such as non freezing solution spray, electrical heating, blowing hot-air, the backheat etc. taked unlike existing defrost technology and cause the part steam latent heat situation of scattering and disappearing to occur and increase operating cost, or to increase cost of investment be cost.
Summary of the invention
Technical problem to be solved by this invention is, in order to overcome the deficiencies in the prior art, defrosting method and the device of the through transport of a kind of many air heat sources heat exchanger are provided, adopt the two or more devices that can carry out with air heat exchange, and form parallel-connection structure form, the motor-driven flowage structure that can mutually switch of through transport being made up of pipeline and controllable valve, its operation parts are few, stable and reliable operation.
The technical solution adopted for the present invention to solve the technical problems is:
More than the present invention, the defrosting method of air heat source heat exchanger through transport is, the mode that adopts heat exchange unit to carry out defrost in turn, the condenser hot fluid of work station main frame is imported and needed in the cell cube of defrost, carry out exchange heat with the frost in this unit heat exchanger outside fin, with defrosting ice-melt, and main frame need not standby, in its work station, main frame heats and is operated in defrost process and can proceeds, detailed process is, the electronic valve of the air heat exchanger of this defrost and evaporator series cuts out, open the electronic valve of connecting with condenser simultaneously, allow and defrost in condenser hot fluid out flows into the air heat exchanger of this defrost.
The defrosting device of air heat source heat exchanger through transport more than the present invention, comprise an air heat exchanger and No. two air heat exchangers, the import of a described air heat exchanger is provided with two laterals, article one, on lateral, electronic valve I is housed, and be connected to the evaporator outlet of work station main frame by pipeline I, electronic valve II is housed on another branch line, and be connected to the condensator outlet of work station main frame by pipeline III, the outlet of a described air heat exchanger is provided with two laterals, article one, on lateral, electronic valve III is housed, and be connected to the evaporator of work station main frame by pipeline II, electronic valve IV is housed on another branch line, and be connected to the condenser inlet of work station main frame by pipeline IV, the import of described No. two air heat exchangers is provided with two laterals, article one, on lateral, electronic valve V is housed, and be communicated with pipeline I, electronic valve VI is housed on another branch line, and is communicated with pipeline III, the outlet of described No. two air heat exchangers is provided with two laterals, article one, on lateral, electronic valve VII is housed, and be communicated with pipeline II, electronic valve VIII is housed on another branch line, and is communicated with pipeline IV, on a described air heat exchanger, No. two air heat exchangers, be respectively equipped with fan.
Further, also be provided with air heat exchanger No. three, the import of described No. three air heat exchangers is provided with two laterals, on a lateral, electronic valve IX is housed, and be communicated with pipeline I, electronic valve X is housed on another branch line, and is communicated with pipeline III, the outlet of described No. three air heat exchangers is provided with two laterals, article one, on lateral, electronic valve XI is housed, and be communicated with pipeline II, electronic valve XII is housed on another branch line, and is communicated with pipeline IV; Described No. three air heat exchangers are provided with fan.Certainly, No. four air heat exchangers, No. five air heat exchangers etc. also can be set on this basis, its connected mode, with No. three air heat exchangers, does not repeat them here.
Further, a described air heat exchanger, No. two air heat exchangers and No. three air heat exchangers are pure contraflow heat exchanger.
What a described air heat exchanger, No. two air heat exchangers and No. three air heat exchanger inside were walked is cold-producing medium, can be applied to small-scale refrigeration air-conditioner and heating air conditioning; What a described air heat exchanger and No. two air heat exchangers and No. three air heat exchanger inside were walked can be non freezing solution or water, applicable to large-scale refrigeration air-conditioner and heating air conditioning.
Described air heat exchanger, can be as the cooling device of summer heat radiation, also can be as the surface cooler of heat absorption in winter, organize the switching of such heat exchanger by electronic valve with parallel way cascade evaporation device in the winter time, the condenser of connecting in summer more.
Described air heat exchanger carries out heat exchange with pure reflux type, this mode heat exchange not only can improve heat exchange efficiency, can also reduce the environment temperature of dewfall frosting, generally be that dewfall just easily appears in evaporator operation in the time of 5 DEG C of environment temperatures winter, affect heat pump normally works in order to prevent high ambient temperature from occurring dewfall, mostly take the large flow way of the little temperature difference to solve this problem, and the same environment temperature that also can reduce dewfall of pure contra-flow heat exchanger, because what air intake ran into is the hot junction of heat exchanger, the frosting so airborne steam cannot be pulled up a horse, be excluded and just condense into water, though adopt countercurrent flow unlike existing heat source tower entirety, heat exchanging effect and reduction frosting environment temperature have certain benefit, but local cross-flow meeting causes local frosting.
The described motor-driven valve being connected serially on evaporator pipeline is opened with shut-in time and the motor-driven valve being connected serially in condenser tubes and is opened with the shut-in time and can carry out simultaneously, and their move or time delay according to environment temperature, heat exchanger surface temperature or ultrasound examination parameter, blast parameter simultaneously.
The present invention adopts evaporimeter more than two or heat source tower through transport combination, in defrost process, unit still can ceaselessly heat work continuously, allow fraction need in the evaporimeter of defrost or air heat exchanger to carry out defrost from condenser hot fluid inflow out and just switches by valve, take single evaporimeter or the air heat exchanger method of defrost in turn, can not affect unit continuous heating process, make heating capacity reach maximization.
Compared with prior art, the present invention has the following advantages:
(1) system flow is simple in structure, and cost of investment is low;
(2) operation parts are few, stable and reliable operation;
(3) quality is light, volume is little, installation is simple, on duty without people;
(4) both there is no the anxiety of frosting dewfall, can make full use of again the latent heat of water in air vapour, and made its important component part as thermal source, and be not subject to condition restriction, in the very large place of humidity, more can show its superiority;
(5) Energy Efficiency Ratio is high, more economical more energy-conservation than existing air energy heat pump;
(6) do not exist non freezing solution drift situation to occur, and affect surrounding enviroment, occurred by corrosion condition without equipment;
(7) need not standby, in defrost process, main frame can proceed to heat work, still can be continuously to room heat supply, there is not the drawback of the time that delay heats;
(8) cooling and warming is all suitable with extensive cooling and warming on a small scale;
(9) adopt pure countercurrent heat exchange method, can reduce defrost time and number of times, this is gradually because air is cooled, instead of decline suddenly, and airborne steam first condenses into water and drained, and this is without starting defrost.
Brief description of the drawings
Fig. 1 is the structural representation of the defrosting device embodiment of air heat source heat exchanger through transport more than the present invention;
In figure: 1-pipeline I, 2-pipeline II, 3-pipeline III, 4-pipeline IV, air heat exchanger of 5-, No. bis-air heat exchangers of 6-, No. tri-air heat exchangers of 7-, 8-electronic valve III, 9-electronic valve I, 10-electronic valve VII, 11-electronic valve V, 12-electronic valve XI, 13-electronic valve IX, 14-electronic valve X, 15-electronic valve XII, 16-electronic valve VI, 17-electronic valve VIII, 18-electronic valve II, 19-electronic valve IV.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail.
With reference to accompanying drawing, the defrosting device of air heat source heat exchanger through transport more than the present embodiment, comprise air heat exchanger 5 No. one, No. two air heat exchangers 6, No. three air heat exchangers 7, the import of a described air heat exchanger 5 is provided with two laterals, article one, on lateral, electronic valve I 9 is housed, and be connected to the evaporator outlet of work station main frame by pipeline I 1, electronic valve II 18 is housed on another branch line, and be connected to the condensator outlet of work station main frame by pipeline III 3, the outlet of a described air heat exchanger 5 is provided with two laterals, article one, on lateral, electronic valve III 8 is housed, and be connected to the evaporator of work station main frame by pipeline II 2, electronic valve IV 19 is housed on another branch line, and be connected to the condenser inlet of work station main frame by pipeline IV 4, the import of described No. two air heat exchangers 6 is provided with two laterals, article one, on lateral, electronic valve V 11 is housed, and be communicated with pipeline I 1, electronic valve VI 16 is housed on another branch line, and is communicated with pipeline III 3, the outlet of described No. two air heat exchangers 6 is provided with two laterals, article one, on lateral, electronic valve VII 10 is housed, and be communicated with pipeline II 2, electronic valve VIII 17 is housed on another branch line, and is communicated with pipeline IV 4, the import of described No. three air heat exchangers 7 is provided with two laterals, article one, on lateral, electronic valve IX 13 is housed, and be communicated with pipeline I 1, electronic valve X 14 is housed on another branch line, and is communicated with pipeline III 3, the outlet of described No. three air heat exchangers 7 is provided with two laterals, article one, on lateral, electronic valve XI 12 is housed, and be communicated with pipeline II 2, electronic valve XII 15 is housed on another branch line, and is communicated with pipeline IV 4, on a described air heat exchanger 5, No. two air heat exchangers 6, No. three air heat exchangers 7, be distributed with fan.
Certainly, in a described air heat exchanger 5, No. two air heat exchangers 6, No. three air heat exchangers 7, can correspondingly reduce one of them, or set up more air heat exchanger on this basis, as No. four air heat exchangers, No. five air heat exchangers etc., its connected mode, with No. two air heat exchangers 6, No. three air heat exchangers 7, does not repeat them here.
The present embodiment comprises two enclosed subsystems: the closed subsystem of condenser of connecting when the closed subsystem of cascade evaporation device is with refrigeration while heating.While heating, the closed subsystem of cascade evaporation device is normality work, the closed subsystem of condenser of connecting when refrigeration is normality work, but heat and not only need the work of the closed subsystem normality of cascade evaporation device, and need the air heat exchanger condenser of connecting in turn respectively according to defrost, go to carry out defrost task.
More than the present embodiment, the defrosting method of air heat source heat exchanger through transport is, the mode that adopts heat exchange unit to carry out defrost in turn, the condenser hot fluid of work station main frame is imported and needed in the cell cube of defrost, carry out exchange heat with the frost in this unit heat exchanger outside fin, with defrosting ice-melt, and main frame need not standby, main frame heats to be operated in and in defrost process, can proceed to heat work in its work station, and constantly from air, obtains latent heat and sensible heat and heat energy is endlessly provided and is used for the thermal source of defrost for room.
Detailed process is: when the fluid coming from the evaporimeter of work station main frame (non freezing solution) flows into respectively air heat exchanger 5 No. one from pipeline I 1, No. two air heat exchangers 6, after No. three air heat exchangers 7, cause because temperature is too low entering the dewfall frosting stage on its heat exchanger fin, main frame need not be shut down or standby, still proceed to heat work, synchronize and carry out with defrost work, specifically take in turn air heat exchanger to be carried out respectively the mode of defrost work, first the electronic valve of the air heat exchanger of this defrost and evaporator series cuts out, open the electronic valve of connecting with condenser simultaneously, allow and defrost in condenser hot fluid out flows into the air heat exchanger of this defrost.Set defrosting time and interval time according to environment temperature, by the good start-up routine of software set, also have next air heat exchanger defrosting time and start-up routine.
This sharpest edges that defrost are in turn not stop over the time of heating, and can realize maximum and on average heat control defrost efficiency, can be room thermal source is endlessly provided, and defrost work does not also affect and heats, and this is that other various defrost modes are all incomparable.As: in the time that an air heat exchanger needs defrost, can first close electronic valve III 8 and the electronic valve I 9 of its in-out end, open electronic valve II 18 and the electronic valve IV 19 of two ends series connection condenser simultaneously, so just start air heat exchanger defrost flow process No. one, No. two and No. three still like this, that is afraid of more No. four, No. five, No. six etc. to move like this.
The remarkable difference of the present invention and existing heat source tower is: the anxiety that not only there is no frosting dewfall, and heat storage container need not be set, reduce this aspect cost of investment, also reduced occupation area of equipment, also avoid heat energy in heat-accumulating process can suffer hot loss of energy, what is more important, it need not shut down in standby, and this is more favourable to protected host, and does not stop over the time of heating, this is stable to maintaining room temperature, keeps good comfort level more favourable; Also need not be expensive dig well adopts underground water defrost, also need not adopt the defrost of non freezing solution spray, and this has not had non freezing solution drift situation to occur, and causes affecting surrounding enviroment.The present invention adopts cross-flow and adverse current combination and air to carry out heat exchange unlike existing heat source tower, but adopt pure reflux type and air to carry out exchange heat, this is more conducive to fully the latent heat of water in air vapour is used, make its important component part as thermal source, like this, just can obtain cheap air energy thermal source, no matter where air can have everywhere, and be not subject to condition restriction, in the very large place of humidity, the present invention more can show its superiority.
Cost of the present invention is low, applied widely, not limited by high latitude and clammy weather, not only can adapt to heat on a small scale, extensive heating air conditioning is particularly applicable, and it is integrated with extensive refrigeration air-conditioner really to realize large-scale heating air conditioning, make Boiler heating become history, and be aided with cheap health hot water and produce, thereby reach the object of maximum average heating load control defrost, this not only can save the energy, all right saving water resource, can realize the tradition of really abandoning Boiler heating, this is for alleviating environmental pressure, eliminating haze tool is of great significance.

Claims (4)

1. the defrosting method of the through transport of air heat source heat exchanger more than a kind, it is characterized in that: the mode that adopts heat exchange unit to carry out defrost in turn, the condenser hot fluid of work station main frame is imported and needed in the cell cube of defrost, carry out exchange heat with the frost in this unit heat exchanger outside fin, with defrosting ice-melt, and main frame need not standby, in its work station, main frame heats and is operated in defrost process and can proceeds, concrete defrost process is, the electronic valve of the air heat exchanger of this defrost and evaporator series cuts out, open the electronic valve of connecting with condenser simultaneously, allow and defrost in condenser hot fluid out flows into the air heat exchanger of this defrost.
2. the defrosting device of the through transport of air heat source heat exchanger more than a kind, it is characterized in that: comprise an air heat exchanger and No. two air heat exchangers, the import of a described air heat exchanger is provided with two laterals, article one, on lateral, electronic valve I is housed, and be connected to the evaporator outlet of work station main frame by pipeline I, electronic valve II is housed on another branch line, and be connected to the condensator outlet of work station main frame by pipeline III, the outlet of a described air heat exchanger is provided with two laterals, article one, on lateral, electronic valve III is housed, and be connected to the evaporator of work station main frame by pipeline II, electronic valve IV is housed on another branch line, and be connected to the condenser inlet of work station main frame by pipeline IV, the import of described No. two air heat exchangers is provided with two laterals, article one, on lateral, electronic valve V is housed, and be communicated with pipeline I, electronic valve VI is housed on another branch line, and is communicated with pipeline III, the outlet of described No. two air heat exchangers is provided with two laterals, article one, on lateral, electronic valve VII is housed, and be communicated with pipeline II, electronic valve VIII is housed on another branch line, and is communicated with pipeline IV, on a described air heat exchanger, No. two air heat exchangers, be respectively equipped with fan.
3. the defrosting device of many air heat sources heat exchanger according to claim 2 through transport, it is characterized in that: be also provided with air heat exchanger No. three, the import of described No. three air heat exchangers is provided with two laterals, article one, on lateral, electronic valve IX is housed, and be communicated with pipeline I, electronic valve X is housed on another branch line, and be communicated with pipeline III, the outlet of described No. three air heat exchangers is provided with two laterals, article one, on lateral, electronic valve XI is housed, and be communicated with pipeline II, electronic valve XII is housed on another branch line, and be communicated with pipeline IV, described No. three air heat exchangers are provided with fan.
4. the defrosting device of many air heat sources heat exchanger according to claim 3 through transport, is characterized in that: a described air heat exchanger, No. two air heat exchangers and No. three air heat exchangers are pure contraflow heat exchanger.
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Publication number Priority date Publication date Assignee Title
WO2017050072A1 (en) * 2015-09-23 2017-03-30 广东美的暖通设备有限公司 Water chiller-heater unit of air cooled heat pump and defrosting control method therefor
WO2020150889A1 (en) * 2019-01-22 2020-07-30 北京卡林新能源技术有限公司 Control system for sequential defrosting of moist-air heat exchanger
CN112944567A (en) * 2021-02-26 2021-06-11 珠海格力电器股份有限公司 Air conditioner control method and device and air conditioning unit
CN112984863A (en) * 2021-03-11 2021-06-18 湖南雅立科技开发有限公司 Heat pump defrosting method and system

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CN203413881U (en) * 2013-08-13 2014-01-29 大连圣太新能源设备有限公司 Alternate shunting and defrosting air source heat pump system
CN203928524U (en) * 2014-05-16 2014-11-05 湖南创化低碳环保科技有限公司 The defrosting device of a kind of many air heat sources heat exchanger through transport

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WO2012161457A2 (en) * 2011-05-23 2012-11-29 Jin Ju-Hwan Heat pump system
CN203413881U (en) * 2013-08-13 2014-01-29 大连圣太新能源设备有限公司 Alternate shunting and defrosting air source heat pump system
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017050072A1 (en) * 2015-09-23 2017-03-30 广东美的暖通设备有限公司 Water chiller-heater unit of air cooled heat pump and defrosting control method therefor
WO2020150889A1 (en) * 2019-01-22 2020-07-30 北京卡林新能源技术有限公司 Control system for sequential defrosting of moist-air heat exchanger
CN113366272A (en) * 2019-01-22 2021-09-07 北京卡林新能源技术有限公司 Wet air heat exchanger wheel-driven defrosting control system
CN112944567A (en) * 2021-02-26 2021-06-11 珠海格力电器股份有限公司 Air conditioner control method and device and air conditioning unit
CN112984863A (en) * 2021-03-11 2021-06-18 湖南雅立科技开发有限公司 Heat pump defrosting method and system

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