CN208365869U - A kind of heat pump system of the multi-stage condensing device condensate liquid deeply undercooling of Multi-stage heating - Google Patents
A kind of heat pump system of the multi-stage condensing device condensate liquid deeply undercooling of Multi-stage heating Download PDFInfo
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Abstract
The utility model discloses a kind of heat pump systems of the multi-stage condensing device condensate liquid deeply undercooling of Multi-stage heating, it include the heat pump unit that at least two condensers are arranged on air intake passage, heat pump unit includes the compressor for being connected to form refrigerant-cycle systems, condenser, throttling set and evaporator, and the condenser sequence arranged of each heat pump unit is in air intake passage；Heat pump system includes the supercooling heat release module for being arranged in air intake passage close to one end of air inlet, and sequence passes through the condenser of supercooling heat release module and each heat pump unit after air-flow enters in air intake passage；Supercooling module is made of at least two heat exchanger little modules, each heat exchanger little module corresponds the end for being connected on condenser in each heat pump unit respectively, refrigerant flows through the progress heat release supercooling of heat exchanger little module after flowing through condenser, enters back into throttling set.
Description
Technical field
The utility model relates to heat pump system designs technical fields, and in particular to a kind of multi-stage condensing device of Multi-stage heating is cold
The heat pump system of lime set deeply undercooling.
Background technique
Heat pump is applied into the middle low temperature drying containing wet stock, has the characteristics that distinct energy conservation and environmental protection, has caused
The highest attention in heat power engineering field and various circles of society.Considerable heat pump air conditioner enterprise tries the heat pump drying of water timber, cigarette
Leaf, jujube, fructus lycii, grape, black fungus, Chinese herbal medicine etc. agricultural product heat pump drying, rice flour, noodles, marine product, pickled and cured meat etc.
Equal food articles heat pump drying and cereal heat pump drying, achieve notable performance.
In general, the way for improving drying device inlet air temperature is taken in order to improve dry tenacity and drying efficiency, that is,
The enthalpy of dry air is improved by improving the temperature of dry air, reduces the relative humidity of air, to improve dry sky
Gas is to heating efficiency and wettability power containing wet stock.
In general, in order to improve the heats power of heat pump drying device and heating energy efficiency ratio, the mode for taking step to heat, i.e.,
It takes multi-stage condensing device to heat dried medium (empty gas and water), target temperature is arrived in the promotion of dried medium temperature step by step
Way: the circulation temperature rise (i.e. the difference of condensation temperature evaporating temperature) of the heating energy efficiency ratio and the heat pump of heat pump unit is negatively correlated,
The difference of condensation temperature evaporating temperature is bigger, and heat pump heating energy efficiency ratio is lower, vice versa；In implementation step heating by multistage
In the heat pump unit of heat pump composition, condenser is located at the unit heat pump of the lower position of step series, since circulation temperature rise is smaller,
Corresponding heat efficiency is higher；And condenser is located at the unit heat pump of the higher position of step series, due to circulation temperature rise compared with
Greatly, corresponding heat efficiency is also just relatively low；It integrates, the whole heating energy efficiency ratio of entire heat pump unit, higher than single-stage
The heat pump unit of systemic circulation temperature rise.
Specifically, generalling use more step heating heat pump drying units, the steaming of each heat pump drying unit in the prior art
It is arranged side by side to send out device, absorbs heat in surrounding air, the condenser of each heat pump drying unit is connected in air duct；When operation, such as scheme
1, under the promotion of evaporator axial flow blower, the heat that 5 evaporators are absorbed from surrounding air, the low voltage refrigeration liquid in evaporator
Heat absorption evaporation becomes low pressure refrigerant gas, is sucked by compressor, is collapsed into high-temperature high-pressure refrigerant gas and is sent into 5 condensations
Device, the higher pressure refrigerant gas in 5 condensers carry out step heating to the dry fresh air in air duct, are heated to target temperature
(such as 70 DEG C), are re-fed into drying unit, dry to the material in drying unit.
Above-mentioned existing more steps heat heat pump drying unit, and the air in air duct is heated to target although can be realized
Temperature achievees the purpose that the whole heating energy efficiency ratio for improving entire heat pump unit, but heat pump drying unit at different levels itself according to
Old that there are heating energy efficiency ratios is relatively low, and the refrigerant condensate liquid in condenser is difficult to the problems such as being effectively subcooled, especially close
The heat pump drying unit condenser of hot air duct output end end.
Utility model content
The existing Multi-stage heating heat pump system proposed in background technique there are aiming at the problem that, the utility model provides one
The heat pump system of the multi-stage condensing device condensate liquid deeply undercooling of kind Multi-stage heating includes that the setting of at least two condensers is being entered the wind
Heat channel on heat pump unit, the heat pump unit include the compressor for being connected to form refrigerant-cycle systems, condenser,
Throttling set and evaporator, the condenser sequence arranged of each heat pump unit is in air inlet heating channel；
The heat pump system includes heat release supercooling module, and the heat release supercooling module arrangement is logical in air inlet heating
Road is close to one end of air inlet, and sequence is by heat release supercooling module and each after air-flow enters in air inlet heating channel
The condenser of a heat pump unit；
The supercooling module is made of at least two heat exchanger little modules, and each heat exchanger little module, which corresponds, to be divided
It is not connected on the end of condenser on each heat pump machine, refrigerant flows through the small mould of the heat exchanger after flowing through the condenser
Block carries out heat release supercooling, enters back into the throttling set；And along the air inlet direction in the air intake passage, further away from it is described into
The heat exchange area of the corresponding heat exchanger little module of the condenser of the air inlet in wind channel is bigger.
Preferably, the heat exchanger little module uses finned tube exchanger.
It is arranged preferably, cold heat exchanger little module is crossed in the heat release along the section parallel airflow of the air intake passage, and
More than two heat exchanger little modules are along the air inlet direction sequence arranged in the air intake passage.
Preferably, it is small to cross cold heat exchanger along the corresponding heat release of the tactic multiple condensers in air inlet direction
Module is sequentially arranged along air inlet direction sequence.
Preferably, the heat release, which is crossed in cold heat exchanger little module, is divided into two independent upper tubes up and down for the pipeline that refrigerant flows through
Road module and lower pipeline module；The refrigerant inlet of the upper pipeline module is located at upper end, and refrigerant outlet is located at lower end；It is described
The refrigerant inlet of lower pipeline module is located at lower end, and refrigerant outlet is located at upper end；The upper pipeline module, the lower pipeline mould
Block is in parallel, and import is connected in series to the end of condenser on the heat pump machine again, and outlet is connected in series to the throttle valve of the heat pump unit again.
Preferably, cold heat exchanger little module is crossed in more than two heat releases, the section along the air intake passage is vertical
In airflow direction sequence arranged.
Preferably, the refrigerant of each condenser output crosses cold heat exchanger little module from the corresponding heat release respectively
Leeward side input, windward side output.
Preferably, each heat pump unit includes that there are two evaporator, respectively the first evaporator and the second evaporations
Device；First evaporator is in parallel with the pipeline of second evaporator, then respectively with the compressor and the throttling set
Series connection.
Preferably, first evaporator and second evaporator are arranged in " V " type, and first evaporator and institute
It states and is provided with a blower between the second evaporator.
The utility model due to using the technology described above, is allowed to compared with prior art, have the following advantages that and accumulate
Pole effect:
1. improving the heats power of heat pump unit
The utility model realizes the deeply undercooling of refrigerating fluid before heat pump unit throttle valve, reduces refrigerant and is throttling
Vaporization ratio in valve improves the ratio of liquid refrigerant in evaporator refrigerant air-liquid two phase flow, expands refrigeration
Evaporation endothermic amount of the agent in evaporator, improves the heats power of heat pump unit；
2. improving the heating energy efficiency ratio of heat pump unit
The utility model increases the heat transfer temperature of refrigerating fluid and the outer air of fin in condenser heat rejection super cooled sect refrigeration pipeline
Difference increases the total calorific value of condenser (including heat release section is subcooled), improves the heating energy efficiency ratio of heat pump unit.
Detailed description of the invention
The above-mentioned and other feature of the utility model can be more clearly understood that by detailed description below in conjunction with attached drawing
And advantage, in which:
Fig. 1 is the connection schematic diagram that Pyatyi condenser fresh air step heats heat pump unit and drying device in the prior art；
Fig. 2 is the pressure-enthalpy chart that Pyatyi condenser fresh air step heats heat pump unit in the prior art；
Fig. 3 is the heat pump system of the multi-stage condensing device condensate liquid deeply undercooling of Multi-stage heating in the utility model embodiment 1
The schematic diagram being connect with drying device；
Fig. 4 is the heat pump system of the multi-stage condensing device condensate liquid deeply undercooling of Multi-stage heating in the utility model embodiment 1
Arrangement schematic diagram；
Fig. 5 is the structural schematic diagram that module is subcooled in heat release in the utility model embodiment 1；
Fig. 6 is the heat pump system of the multi-stage condensing device condensate liquid deeply undercooling of Multi-stage heating in the utility model embodiment 2
The schematic diagram being connect with drying device；
Fig. 7 is the heat pump system of the multi-stage condensing device condensate liquid deeply undercooling of Multi-stage heating in the utility model embodiment 2
Arrangement schematic diagram；
Fig. 8 is the structural schematic diagram that module is subcooled in heat release in the utility model embodiment 2.
Specific embodiment
Referring to the attached drawing for showing the utility model embodiment, the utility model is described in more detail.However, this reality
It can be realized in many different forms with novel, and should not be construed as being limited by the embodiment herein proposed.On the contrary, proposing
These embodiments be in order to reach sufficiently and complete disclosure, and make those skilled in the art understands completely this it is practical newly
The range of type.In these attached drawings, for clarity, the size and relative size in layer and region may be exaggerated.
Referring to Fig.1, heat pump unit is heated for Pyatyi condenser fresh air step in the prior art, this is analyzed.
Under step heating mode, the wind path of multiple condensers 301 in air inlet heating channel 2 is series relationship, multistage
Condenser carries out step heating to dry air, drying air temperature is promoted to target temperature step by step, that is to say, that at this
In step heating process, the outlet air of upper level condenser becomes the air inlet of next stage condenser.This is in step for condenser
The heat pump unit for heating the high condensation temperature position of series, produces dual adverse effect:
1. heating energy efficiency ratio reduces
Compared with condenser is located at the serial condensation temperature lower position heat pump unit of step heating, condenser is located at step system
The heat pump unit of the condensation temperature higher position of column, circulation temperature rise (difference of condensation temperature evaporating temperature) increase, corresponding to make
Hot Energy Efficiency Ratio substantially decays；
2. the refrigerant condensate liquid in condenser is difficult to effectively be subcooled
It is its upper level heat pump due to being located at the air inlet of the heat pump unit condenser of step series condensation temperature higher position
The outlet air of train condenser, and this upper level heat pump unit condenser outlet air also has already passed through and heats several times, temperature is already
It is higher, therefore effectively supercooling can not be implemented to the refrigerant condensate liquid in this grade of condenser, that is, implement to condense under saturation pressure
" supercooling " to saturation temperature is realized in further cooling heat release of the liquid phase for saturation temperature；In terms of condenser group air inlet direction,
Due to the jacking of the higher leaving air temp of upper level heat pump unit condenser, the temperature of this grade of condenser ends refrigerating fluid is always high
In the temperature of the outlet air (the namely air inlet of the same level condenser) of upper level condenser.
And from the point of view of the thermal characteristics that refrigerant on pressure-enthalpy chart shares, in heat pump condenser, the condensation enthalpy difference of refrigerant
It is smaller, sensible heat enthalpy difference is larger；And condensation temperature is higher, and the condensation enthalpy difference of refrigerant is smaller, sensible heat enthalpy difference is bigger；When condensation temperature
When degree reaches refrigerant critical-temperature, condensation enthalpy difference is reduced to zero, sensible heat enthalpy difference and reaches maximum；
If heat pump unit condenser ends refrigerating fluid can not achieve effective supercooling, that is, complete the condensation of condensation phase transformation
The sensible heat of liquid, which is not carried out, to be released effectively, and condensate liquid will have the refrigerating fluid of larger proportion (such as 40%) to exist after entering throttling set
In throttling set carburation by evaporation absorb heat, with absorb unboiled part refrigerating fluid autocondensation temperature to evaporating temperature transition and must
The sensible heat that must be discharged, this will be such that vapour phase ratio in throttling set outlet vapour-liquid mixed phase refrigerant greatly increases, and cause to evaporate
Liquid refrigerant supply is insufficient in device, and evaporator heat absorption capacity is insufficient, to cause the heating capacity of condenser insufficient！
It referring to Fig. 2, is heated for above-mentioned Pyatyi condenser fresh air step and heats circulation on heat pump system pressure-enthalpy chart, fresh air is passed through
The step of the condenser of 5 grades of heat pump units heats, and reaches target temperature: since the air inlet of every level-one heat pump unit condenser is all
The outlet air of upper level heat pump unit condenser, causes the condensation temperature lifting step by step of postposition grade heat pump unit, and refrigerant gas is cold
The enthalpy difference of solidifying heat release section is shorter and shorter, the enthalpy difference of evaporator refrigeration liquid evaporation endothermic section is shorter and shorter, throttling set outlet refrigeration
The mass dryness fraction of agent is higher and higher；The mass dryness fraction of the throttling set outlet refrigerant of 1st grade~the 5th grade heat pump unit respectively may be about 17%,
21%, 26%, 33%, 44%, increase step by step, to the 5th grade i.e. highest condensation temperature grade, throttling set exports refrigerant mass dryness fraction
Up to 44%, that is, carry out the condensate liquid of condenser, there is 44% to vaporize in throttling set, only 56%, which enters evaporator evaporation, inhales
Heat causes evaporator caloric receptivity to be greatly reduced.
If the 5th grade of heat pump unit throttling set outlet refrigerant mass dryness fraction for being in highest condensation temperature is reduced by 20
Percentage point, i.e. mass dryness fraction are reduced to 24% or so, then the caloric receptivity of the 5th grade of heat pump unit evaporator, will increase by 20%/56%=
35.7%！
The deeply undercooling heat release problem of condenser ends refrigerating fluid has become influence for high temperature heat pump drying device
One critical issue of heats power and heating energy efficiency ratio.Heat pump condenser end refrigerating fluid is set to obtain deeply undercooling, that is,
It discharges the sensible heat of condensate liquid sufficiently, is the vital task of heat pump drying unit innovative design.
Raising (the example of the final leaving air temp of drying device inlet air temperature i.e. step heating heat pump system condenser
Such as 70 DEG C), the condensation temperature that will lead in step heating series positioned at several heat pump condensers of position rearward is also corresponding
It improves (such as the condensation temperature of last 2 grades of condensers respectively reaches 65 DEG C, 75 DEG C), is much higher than the condensation temperature of common air-conditioning
It spends, the high temperature condensate liquid in these heat pump condensers has biggish " supercooling " thermal discharge, while having relative to Cryogenic air
Biggish heat release power (temperature difference) is subcooled, can (or the evaporator under dry gas stream closed cycle mode be low to surrounding air
Warm outlet air) sensible heat for being equivalent to evaporator caloric receptivity 1/3 or so is released, thus there is very high technical meaning and business valence
Value.
For it is above-mentioned analyze come problem, the utility model provides a kind of multi-stage condensing device condensate liquid of Multi-stage heating
The heat pump system of deeply undercooling includes at least two heat pump unit condensers being arranged on air intake passage；Heat pump unit packet
Include the compressor for being connected to form refrigerant-cycle systems, condenser, throttling set and evaporator, the condensation of each heat pump unit
Device sequence arranged is in the air intake passage；Heat pump system further includes having a supercooling heat release module, and heat release module cloth is subcooled
It sets in condenser group air intake passage close to one end of air inlet, mould is subcooled by heat release in sequence after air-flow enters in air intake passage
The condenser of block and each heat pump unit；Supercooling module is made of at least two heat exchanger little modules, and each heat exchanger is small
Module corresponds the end for being connected on condenser in each heat pump unit respectively, and refrigerant flows through heat exchanger after flowing through condenser
Little module carries out further heat release supercooling, enters back into throttling set；And along the air inlet direction in air intake passage, further away from described
The heat exchange area of the corresponding heat exchanger little module of the condenser of the air inlet of air intake passage is bigger.
Wherein, the setting number of the heat pump unit of heat pump system can be selected as the case may be, can for two or
Three or three or more, herein with no restrictions.
Condenser in each heat pump unit in condenser is introduced into condenser group air intake passage front end by the utility model
Supercooling heat release module in, utilize the high-temperature refrigeration that introduces in the low temperature environment fresh air and heat release supercooling module of air intake passage front end
Agent carries out heat exchange, realizes sensible heat release and the deeply undercooling of high temperature refrigerant, is flowed into throttling dress after refrigerant deeply undercooling
In setting, to reduce gasification ratio of the refrigerant in throttling set, and then increases to evaporator to liquid measure, expand steaming
The caloric receptivity for sending out device, improves total heat release power of condenser, to improve the heats power and heat efficiency of entire heat pump system
Than；The utility model is in supercooling module simultaneously, according to the height of condensation temperature in each heat pump unit, according to heat pump machines at different levels
The total arrangement of group corresponding condenser refrigerating fluid and fresh air " counterflow heat exchange ", carrys out sequence arrangement super cooled sect, specific: according to ladder
Grade heats the height of each heat pump unit condensation temperature, and to match the heat release area of the heat pump unit super cooled sect: condensation temperature is got over
Low, super cooled sect heat release area is smaller；Condensation temperature is higher, and super cooled sect heat release area is bigger.
The utility model is by implementing refrigerating fluid deeply undercooling technology, by condenser ends (heat release super cooled sect) outlet (section
Stream valve import) refrigerating fluid temperature be reduced to the temperature close to environment fresh air at condenser ends position, to make refrigerating fluid
It is sufficiently exothermic in heat release super cooled sect, in throttling set in vaporization ratio be greatly reduced, into the liquid refrigeration of evaporator
Agent ratio greatly improves, and evaporation endothermic amount of the liquid refrigerant in evaporator greatly improves, to make the heating of heat pump unit
Power and heating energy efficiency ratio greatly improve；
A kind of heat pump unit of the multi-stage condensing device condensate liquid deeply undercooling of Multi-stage heating provided by the utility model, has
Following usefulness:
1. improving the heats power of heat pump unit
The utility model realizes the deeply undercooling of refrigerating fluid before heat pump unit throttle valve, reduces refrigerant and is throttling
Vaporization ratio in valve improves the ratio of liquid refrigerant in evaporator refrigerant air-liquid two phase flow, expands refrigeration
Evaporation endothermic amount of the agent in evaporator, improves the heats power of heat pump unit；
2. improving the heating energy efficiency ratio of entire heat pump system
The utility model increases the heat transfer temperature of refrigerating fluid and air in condenser ends (heat release super cooled sect) refrigeration pipeline
Difference increases the total calorific value of condenser (including heat release section is subcooled), improves the heating energy efficiency ratio of entire heat pump system.
Specific embodiment is further described below, specific:
Embodiment 1
Reference Fig. 3-5, the heat pump system of the multi-stage condensing device condensate liquid deeply undercooling of Multi-stage heating provided in this embodiment,
It include three groups of heat pump units, respectively heat pump unit 4, heat pump group 5 and heat pump unit 6；Certainly, heat pump in other embodiments
The number of unit can also be adjusted as the case may be, herein with no restrictions.
In the present embodiment, heat pump unit 4, heat pump group 5 are identical with the component part of heat pump unit 6, with heat pump unit 4
It is described further for structure.Specifically, heat pump unit 4 includes connected compressor 405, condenser 401, throttling set
402 and evaporator, compressor 405, condenser 401, throttling set 402 and evaporator be connected to form following for refrigerant circulation
Loop system.The circulation theory of refrigerant are as follows: from compressor come out it is pressurized after high temperature refrigerant gas, flow through condenser
Pipeline realizes heat release cooling, condensation liquefaction, is depressured through throttling set and is input to evaporator at the refrigerant vapour-liquid mixed phase of low pressure
Pipeline in, absorb heat of vaporization become low pressure refrigerant gas；Compressor is again to the low pressure refrigerant gas to be come by evaporator
After body is pressurizeed, it is conveyed to condenser, to form a complete refrigerant circulation.
The condenser 601 of the condenser 401 of heat pump unit 4, the condenser 501 of heat pump group 5 and heat pump unit 6 sequentially arranges
It is arranged in the air inlet heating channel 2 being connected with drying device 1, introduces extraneous low temperature environment fresh air as dried medium, enter
Sequentially pass through condenser 601, condenser 501 and condenser 401 in air intake passage, and exchanges heat gradually be heated to form high temperature therewith
Dry air.
Each heat pump unit includes that there are two evaporator in parallel, respectively the first evaporator and the second evaporators；The
After one evaporator is in parallel with the pipeline of the second evaporator, both ends are connected with compressor and throttling set respectively again.With heat pump unit 4
For be illustrated, heat pump unit 4 includes the first evaporator 403 and the second evaporator 404 of pipeline parallel connection, and first evaporates
Device 403 and the second evaporator 404 are arranged in " V " type, and are provided with a wind between the first evaporator 403 and the second evaporator 404
Machine 406.
The evaporator of the evaporator of heat pump unit 4, the evaporator of heat pump group 5 and heat pump unit 6 is respectively positioned in external environment,
And outside air blows over each evaporator under the action of blower, the heat that heat exchange is drawn in surrounding air therewith carrys out heating evaporation
Refrigerant in evaporator.
Certainly, in other embodiments, the specific structure of each heat pump system is not limited to the above, can also basis
Concrete condition is adjusted, herein with no restrictions.
In the present embodiment, it is arranged for the heat release supercooling heat exchange module of condenser condensate liquid heat release supercooling in condenser 601
Air inlet front side, air inlet flow to condenser 601 after first passing through heat release supercooling heat exchange module again；Heat exchange mould is subcooled in heat release by the present embodiment
Block is arranged in the air inlet front end in air inlet heating channel 2, enters the wind it preferentially with low temperature and carries out heat exchange.Heat exchange module is subcooled in heat release
Including there are three heat releases to cross cold heat exchanger little module, cold heat exchanger little module respectively is crossed with the concatenated heat release of heat pump unit 4
701, cold heat exchanger little module 702 is crossed with the concatenated heat release of heat pump unit 5 and is subcooled with the concatenated heat release of heat pump unit 6 exchanges heat
Device little module 703.
Wherein, heat release cross cold heat exchanger little module setting number it is consistent with the setting number of heat pump unit, do not do herein
Limitation.
Wherein, preferred heat release crosses cold heat exchanger little module using finned tube exchanger, puts in other embodiments certainly
Heat, which crosses cold heat exchanger little module, can also be used the heat exchanger of other forms, herein with no restrictions.
Further, as shown in figure 5, cold heat exchanger little module 701 is crossed in heat release processed, cold heat exchanger little module 702 is crossed in heat release
And heat release is crossed cold heat exchanger little module 703 and is vertically arranged each along the section of air intake passage, and the small mould of cold heat exchanger is crossed in heat release
Block 703, heat release cross cold heat exchanger little module 702, heat release cross cold heat exchanger little module 701 along air inlet heating channel 2 in into
Wind direction sequence arranged, in order to which flow through heat release crosses cold heat exchanger module to low temperature air inlet comprehensively.Wherein, heat release supercooling heat exchange
It can be a complete fin that device little module 701, heat release, which cross cold heat exchanger little module 702, cold heat exchanger little module 703 is crossed in heat release
Heat exchange of heat pipe, internal heat exchanger tube are divided into independent three parts to form three independent heat releases and cross cold heat exchanger little module；
Alternatively, cold heat exchanger little module 701 is crossed in heat release, cold heat exchanger little module 702 is crossed in heat release, cold heat exchanger little module 703 is crossed in heat release
It is directly three absolute construction, herein with no restrictions.
Further, it in conjunction with Fig. 4 and Fig. 5, is subcooled along the tactic three condensers refrigerating fluid heat release in air inlet direction
Cold heat exchanger little module is crossed in corresponding heat release, is sequentially arranged along air inlet direction sequence；I.e. along the row of air inlet direction condenser
Column sequence is: 601 → condenser of condenser, 501 → condenser 401 crosses the row of cold heat exchanger little module along air inlet direction heat release
Column sequence are as follows: heat release, which crosses cold heat exchanger 703 → heat release of little module and crosses cold heat exchanger 702 → heat release of little module, crosses the small mould of cold heat exchanger
Block 701.In the heat pump unit of air duct series connection fresh air Multi-stage heating, refrigerant condensate liquid in condenser bodies at different levels, temperature
Degree is all close to the saturation temperature under the condensing pressure of the heat pump unit；It is seen along dry fresh air airflow direction, condensers at different levels
The saturation temperature of refrigerant condensate liquid is higher and higher, and (i.e. the saturation temperature > condenser 501 of 401 refrigerant condensate liquid of condenser is made
The saturation temperature of the 601 refrigerant condensate liquid of saturation temperature > condenser of cryogen condensate liquid)；The present embodiment is in condenser heat rejection mistake
On cold heat exchange module, according to the height of each heat pump unit condensation temperature, " countercurrently changed according to condenser refrigerating fluids at different levels with fresh air
The total arrangement of heat ", carrys out sequence arrangement super cooled sect: in terms of fresh air airflow direction, the supercooling of the minimum heat pump unit of condensation temperature
Section is arranged up front, and so on, the super cooled sect of the highest heat pump unit of condensation temperature is arranged backmost.
Further, heat exchange area (occupying 3 row's refrigeration pipelines) > heat release supercooling of cold heat exchanger little module 701 is crossed in heat release
The heat exchange area of cold heat exchanger little module 701 is crossed in heat exchange area (occupying 2 row's refrigeration pipelines) > heat release of heat exchanger little module 702
(occupying 1 row's refrigeration pipeline) specifically can cross the side such as number of plies, length of pipeline in cold heat exchanger little module by the way that heat release is arranged
Formula realizes the difference of heat exchange area, herein with no restrictions.Since in the condenser series that step heats, condensation temperature is in
Condensate liquid is saturated in the condenser of higher position has biggish sensible heat enthalpy difference relative to low temperature fresh air, and the present embodiment is according to step
The height of each heat pump unit condensation temperature is heated, to match the heat release area of the heat pump unit super cooled sect: condensation temperature is lower,
Super cooled sect heat release area is smaller；Condensation temperature is higher, and super cooled sect heat release area is bigger.
Further, referring to Fig. 5, being divided into cold heat exchanger little module for the pipeline that refrigerant flows through is spent in each heat release
Lower two independent upper pipeline modules and lower pipeline module；The refrigerant inlet of upper pipeline module is located at upper end, and refrigerant outlet is located at
Lower end；The refrigerant inlet of lower pipeline module is located at lower end, and refrigerant outlet is located at upper end；Upper pipeline module, the lower pipeline
Wired in parallel, then it is connected in series to the end of condenser on heat pump machine.Specifically, the refrigerant for having condenser 401 to export is divided into parallel connection
Two-way have respectively entered upper pipeline module and lower pipeline module that cold heat exchanger little module 701 is crossed in heat release, by upper pipeline module
With lower pipeline module discharge after be delivered back into throttling set 402 together again, and so on condenser 501 and heat release supercooling exchange heat
The connection type that connection type, condenser 601 and heat release between device little module 702 are crossed between cold heat exchanger little module 703 is equal
Referring to the above, details are not described herein again.
Since the specific heat capacity of refrigerant condensate liquid is relatively small, so refrigerating fluid is along flowing in condenser super cooled sect
The temperature decline in direction is very fast；If there is high temperature refrigerant condensate liquids near the refrigeration liquid pipeline of some deeply undercooling
Pipeline, then high temperature refrigerant condensate liquid will be acted on by the heat bridge of fin, hinder the depth of the refrigerating fluid in this close region pipeline
It spends cold.When the configuration of multiple condenser super cooled sects is in the same heat exchanger module, the present embodiment takes " refrigerating fluid outlet end
The method that (or liquid feeding end) is disposed adjacent, to arrange the layout and trend of each condenser super cooled sect finned tube, to weaken height
Warm refrigerating fluid is by fin heat bridge to the negatively influencing of lower temperature refrigeration liquid deeply undercooling.
The multi-stage condensing device condensate liquid deeply undercooling heat pump unit and grain-drying of Multi-stage heating provided in this embodiment fill
It is as shown in Figure 3 to set 1 combined machine system device figure, the course of work are as follows: dry fresh air by condenser heat exchange module 7,
Condenser 601, condenser 501, condenser 401 be total to level Four heating, become 70 DEG C of RH5% or so high temperature dry air from right side into
Enter in grain drying device, carries out hot and humid area with damp grain and become 30 DEG C of RH90% or so warm-humid air again from left side quilt
Centrifugal blower extraction is discharged into atmosphere.
The heat pump system of the multi-stage condensing device condensate liquid deeply undercooling of fresh air Multi-stage heating provided in this embodiment is beneficial
Place is:
1. generating heat in supercooling module in dedicated condenser group refrigerating fluid, " refrigerant condensate liquid and fresh air air-flow are inverse for implementation
Stream heat exchange ", takes full advantage of " low-temperature characteristics " of fresh air air-flow, increases the total heat release of condenser including supercooling heat release section
Amount, improves total heats power of heat pump unit；
2. reducing vaporization of the refrigerant in throttling set by implementing refrigerating fluid deeply undercooling before throttling set
Ratio improves the ratio of liquid refrigerant in evaporator refrigerant air-liquid two phase flow, effectively expands refrigerant and is steaming
The evaporation endothermic amount in device and thermal discharge within the condenser are sent out, to improve heat pump unit heating energy efficiency ratio；
3. according to the height of each heat pump unit condensation temperature, according to condenser refrigerating fluids at different levels and fresh air " counterflow heat exchange "
Total arrangement, carry out sequence arrangement super cooled sect；The super cooled sect of every first-stage condenser has all been covered with entire fresh air airflow channel and has cut
Face, no matter heat pump unit rate of load condensate, the condenser for putting into the heat pump unit of heating operation has several, can improve supercooling
The uniformity of root module and entire condenser group module leaving air temp on outlet air section.
Embodiment 2
Referring to Fig. 6-8, the present embodiment is the modification carried out on the basis of embodiment 1, relative to 1 the present embodiment of embodiment
The structure of middle condenser heat exchange module is adjusted.
Specifically, in the present embodiment, heat release supercooling heat exchange module 7 ' includes crossing cold heat exchanger little module there are three heat release,
Cold heat exchanger little module 701 ' is respectively crossed with the concatenated heat release of heat pump unit 4, is changed with the concatenated heat release of heat pump unit 5 supercooling
Hot device little module 702 ' and cold heat exchanger little module 703 ' is crossed with the concatenated heat release of heat pump unit 6, is located at from bottom to top
3 dotted line frames in.
Further, cold heat exchanger little module 703 ' is crossed in heat release, cold heat exchanger little module 702 ' is crossed in heat release, heat release supercooling is changed
Hot device little module 701 ' sequence arranged from top to bottom on perpendicular to airflow direction along the section in air inlet heating channel 2；
Moreover, heat exchange area (occupying 6 refrigeration branches from left to right in figure) > heat release of cold heat exchanger little module 701 ' is crossed in heat release
Cold heat exchanger is crossed in heat exchange area (4 refrigeration branches from left to right are occupied in figure) the > heat release for crossing cold heat exchanger little module 702 '
The heat exchange area (2 refrigeration branches from left to right are occupied in figure) of little module 703 '.
In step heating condenser series, condensation temperature is in the saturation condensate liquid of higher position relative to environment fresh air
With biggish sensible heat enthalpy difference；Height of the utility model according to each heat pump unit condensation temperature, to distribute the heat pump unit
Heat release area of the super cooled sect in entirely supercooling module: condensation temperature is lower, and super cooled sect heat release area is smaller；Condensation temperature is got over
Height, super cooled sect heat release area are bigger.
Further, the refrigerant of each condenser output crosses the same side of cold heat exchanger little module from corresponding heat release respectively
(by wind side) input, the same side (windward side) output.The refrigerant that i.e. condenser 4 exports crosses cold heat exchanger little module from heat release
701 ' left side enters, and exports after heat exchange from right side；The refrigerant that condenser 5 exports crosses cold heat exchanger little module 702 ' from heat release
Left side enter, after heat exchange from right side export；The refrigerant that condenser 64 exports crosses cold heat exchanger little module 703 ' from heat release
Left side enters, and exports after heat exchange from right side.
Since the specific heat capacity of refrigerant condensate liquid is relatively small, so refrigerating fluid is along flowing in condenser super cooled sect
The temperature decline in direction is very fast；If there is the high temperature systems close to saturation temperature near the refrigeration liquid pipeline of deeply undercooling
Cryogen condensate liquid, then high temperature refrigerant condensate liquid will be acted on by the heat bridge of fin, hinder the depth of this close region refrigerating fluid
Supercooling.When the configuration of multiple condenser super cooled sects is in the same heat exchanger module, the present embodiment takes " refrigerating fluid outlet end
The method that (or liquid feeding end) is disposed adjacent, to arrange the layout and trend of each condenser super cooled sect finned tube, to weaken wing
Negatively influencing of the piece heat bridge to refrigerating fluid deeply undercooling.
The multi-stage condensing device condensate liquid deeply undercooling heat pump unit and grain-drying of Multi-stage heating provided in this embodiment fill
It is as shown in Figure 6 to set 1 combined machine system device figure, the course of work are as follows: dry fresh air by condenser heat exchange module 7 ',
Condenser 601, condenser 501, condenser 401 are total to level Four heating, become 70 DEG C of RH5% or so high temperature dry air from right side
Into in drying unit, with damp grain carry out hot and humid area and become 30 DEG C of RH90% or so warm-humid air again from left side by from
The extraction of heart blower is discharged into atmosphere.
Super cooled sect heat transfer area provided in this embodiment is in the Multi-stage heating heat pump machine configured perpendicular to airflow direction
Group has the beneficial effect that
1. being subcooled in module in dedicated condenser group refrigerating fluid, take full advantage of " low-temperature characteristics " of low-temperature airflow, increases
Add the condenser total calorific value including supercooling heat release section, improves total heats power of heat pump unit；
2. reducing vaporization ratio of the refrigerant in throttle valve by implementing refrigerating fluid deeply undercooling before throttle valve
Example, improves the ratio of liquid refrigerant in evaporator refrigerant air-liquid two phase flow, effectively expands refrigerant and evaporating
Evaporation endothermic amount in device and thermal discharge within the condenser, improve the heating energy efficiency ratio of heat pump unit.
Those skilled in the art should be understood that the utility model can be realized with many other concrete forms without de-
Spirit or scope from itself.Although the case study on implementation of the utility model has been described, it should be understood that the utility model should not limit
Be made as these embodiments, those skilled in the art can as defined by the following claims the spirit of the utility model and
Within the scope of make change and modification.
Claims (9)
1. a kind of heat pump system of the multi-stage condensing device condensate liquid deeply undercooling of Multi-stage heating, includes that at least two condensers are set
Set the heat pump unit on air inlet heating channel, which is characterized in that the heat pump unit includes to be connected to form refrigerant circulation
Compressor, condenser, throttling set and the evaporator of system, the condenser sequence arranged of each heat pump unit is in institute
It states in air inlet heating channel；
The heat pump system includes heat release supercooling module, and the heat release supercooling module arrangement is leaned in air inlet heating channel
One end of nearly air inlet, sequence is by heat release supercooling module and each institute after air-flow enters in air inlet heating channel
State the condenser of heat pump unit；
The supercooling module is made of at least two heat exchanger little modules, and each heat exchanger little module one-to-one correspondence is gone here and there respectively
Be associated in the end of condenser on each heat pump machine, refrigerant flow through flow through after the condenser heat exchanger little module into
Row heat release supercooling, enters back into the throttling set；It is logical further away from the air inlet and along the air inlet direction in the air intake passage
The heat exchange area of the corresponding heat exchanger little module of the condenser of the air inlet in road is bigger.
2. the heat pump system of the multi-stage condensing device condensate liquid deeply undercooling of Multi-stage heating according to claim 1, feature
It is, the heat exchanger little module uses finned tube exchanger.
3. the heat pump system of the multi-stage condensing device condensate liquid deeply undercooling of Multi-stage heating according to claim 1 or 2, special
Sign is that the heat release is crossed cold heat exchanger little module and is arranged along the section parallel airflow of the air intake passage, and more than two
The heat exchanger little module along the air inlet direction sequence arranged in the air intake passage.
4. the heat pump system of the multi-stage condensing device condensate liquid deeply undercooling of Multi-stage heating according to claim 3, feature
It is, crosses cold heat exchanger little module along the corresponding heat release of the tactic multiple condensers in air inlet direction, sequence
It is arranged along air inlet direction sequence.
5. the heat pump system of the multi-stage condensing device condensate liquid deeply undercooling of Multi-stage heating according to claim 3, feature
It is, the heat release, which is crossed in cold heat exchanger little module, is divided into upper and lower two independent upper pipeline modules under for the pipeline that refrigerant flows through
Ducting module；The refrigerant inlet of the upper pipeline module is located at upper end, and refrigerant outlet is located at lower end；The lower pipeline module
Refrigerant inlet be located at lower end, refrigerant outlet is located at upper end；The upper pipeline module, the lower pipeline wired in parallel, into
Mouth is connected in series to the end of condenser on the heat pump machine again, and outlet is connected in series to the throttle valve of the heat pump unit again.
6. the heat pump system of the multi-stage condensing device condensate liquid deeply undercooling of Multi-stage heating according to claim 1 or 2, special
Sign is that cold heat exchanger little module is crossed in more than two heat releases, along the section of the air intake passage perpendicular to air-flow side
To sequence arranged.
7. the heat pump system of the multi-stage condensing device condensate liquid deeply undercooling of Multi-stage heating according to claim 6, feature
It is, the leeward side that the refrigerant of each condenser output crosses cold heat exchanger little module from the corresponding heat release respectively is defeated
Enter, windward side output.
8. the heat pump system of the multi-stage condensing device condensate liquid deeply undercooling of Multi-stage heating according to claim 1, feature
It is, each heat pump unit includes that there are two evaporators, respectively the first evaporator and the second evaporator；Described first
Evaporator is in parallel with the pipeline of second evaporator, then connects respectively with the compressor and the throttling set.
9. the heat pump system of the multi-stage condensing device condensate liquid deeply undercooling of Multi-stage heating according to claim 8, feature
It is, first evaporator and second evaporator are arranged in " V " type, and first evaporator and second evaporation
A blower is provided between device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820623905.8U CN208365869U (en) | 2018-04-27 | 2018-04-27 | A kind of heat pump system of the multi-stage condensing device condensate liquid deeply undercooling of Multi-stage heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820623905.8U CN208365869U (en) | 2018-04-27 | 2018-04-27 | A kind of heat pump system of the multi-stage condensing device condensate liquid deeply undercooling of Multi-stage heating |
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| CN208365869U true CN208365869U (en) | 2019-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820623905.8U Withdrawn - After Issue CN208365869U (en) | 2018-04-27 | 2018-04-27 | A kind of heat pump system of the multi-stage condensing device condensate liquid deeply undercooling of Multi-stage heating |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108507231A (en) * | 2018-04-27 | 2018-09-07 | 上海伯涵热能科技有限公司 | A kind of heat pump system of the multi-stage condensing device condensate liquid deeply undercooling of Multi-stage heating |
| CN115235194A (en) * | 2022-04-27 | 2022-10-25 | 山东大学 | Multistage closed heat pump drying system and method |
-
2018
- 2018-04-27 CN CN201820623905.8U patent/CN208365869U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108507231A (en) * | 2018-04-27 | 2018-09-07 | 上海伯涵热能科技有限公司 | A kind of heat pump system of the multi-stage condensing device condensate liquid deeply undercooling of Multi-stage heating |
| CN108507231B (en) * | 2018-04-27 | 2023-12-29 | 浙江普林艾尔电器工业有限公司 | Multistage heating multistage condenser condensate deep supercooling heat pump system |
| CN115235194A (en) * | 2022-04-27 | 2022-10-25 | 山东大学 | Multistage closed heat pump drying system and method |
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