CN109827419A - A kind of big temperature of air-source is across high-temperature heat pump drying system - Google Patents

A kind of big temperature of air-source is across high-temperature heat pump drying system Download PDF

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Publication number
CN109827419A
CN109827419A CN201910127889.2A CN201910127889A CN109827419A CN 109827419 A CN109827419 A CN 109827419A CN 201910127889 A CN201910127889 A CN 201910127889A CN 109827419 A CN109827419 A CN 109827419A
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valve
shut
temperature
air
outlet
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CN201910127889.2A
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CN109827419B (en
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公茂琼
孙守军
郭浩
赵延兴
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Technical Institute of Physics and Chemistry of CAS
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Technical Institute of Physics and Chemistry of CAS
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/52Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency

Abstract

A kind of big temperature of air-source is across high-temperature heat pump drying system, it include: compressor, blower, hothouse, evaporator, condenser, Recuperative heat exchanger, first throttle element, second restricting element, first shut-off valve, second shut-off valve, third shut-off valve, 4th shut-off valve, 5th shut-off valve, 6th shut-off valve, 7th shut-off valve, 8th stop valve, first condensing trapping separator, second condensing trapping separator, first tapping valve and the second tapping valve, the big temperature of air-source provided by the invention is across high-temperature heat pump drying system, utilize mixed working fluid phase transition temperature slip characteristic, in conjunction with introducing Recuperative heat exchanger, realize big temperature across efficient heat supply, it is realized using Conventional press single stage compress and high temperature drying institute calorific requirement is provided, drying temperature is high, dehydration temperaturre is low, dehydration efficiency is high, and process is simple, it is at low cost.

Description

A kind of big temperature of air-source is across high-temperature heat pump drying system
Technical field
The present invention relates to heat pump drying field technical field, in particular to a kind of across high temperature heat pump drying system of the big temperature of air-source System.
Background technique
High temperature drying is widely used in the fields such as wood producing, production of crude drugs, food production, by reducing water in raw material Divide content, to guarantee the quality of product.The dry required temperature of control, guarantees product drying quality, is the key that dry technology, High temperature drying can promote the rate of drying of product, be the important technical for improving drying efficiency.
Heat pump drying is a kind of drying mode of clean and effective, by a small amount of electric energy of consumption, absorbs the heat in environment, It is translated into for drying required high temperature heat.And normal temperature air is heated to 80~100 DEG C of high temperature drying required temperatures, Conventional heat pump single stage compress is difficult to realize.Although using CO2Heat needed for Trans-critical cycle heat pump is capable of providing 80~100 DEG C of high temperature dryings Amount, but it runs high pressure and often reaches 10MPa or more, needs dedicated compressor and corresponding components, it is at high cost.
Summary of the invention
Have in view of that, it is necessary in view of the defects existing in the prior art, a kind of safety and environmental protection, energy-efficient be provided, can be mentioned For 80~100 DEG C of high temperature drying institute calorific requirements big temperature across heat pump drying system.
To achieve the above object, the present invention adopts the following technical solutions:
It include: compressor, blower, hothouse, evaporator, condenser, Recuperative heat exchanger, first throttle element, the second section Fluid element, the first shut-off valve, the second shut-off valve, third shut-off valve, the 4th shut-off valve, the 5th shut-off valve, the 6th shut-off valve, the 7th Shut-off valve, the 8th stop valve, the first condensing trapping separator, the second condensing trapping separator, the first tapping valve and the second drain Valve,
The high-pressure outlet of the compressor is connect with the 5th shut-off valve import, the 6th shut-off valve import respectively, and the described 5th End the company, high-pressure refrigerant entrance institute of valve outlet and condenser, the 6th cut-off valve outlet and the second condensing trapping device high pressure The high-pressure refrigerant outlet of the connection of cryogen entrance, the condenser is connected with the high-pressure refrigerant entrance of Recuperative heat exchanger, described The high-pressure refrigerant outlet of Recuperative heat exchanger is connected with first throttle element inlet, and the first throttle component outlet is respectively with the Two condensing trapping separator high pressure refrigerant inlets and the 6th cut-off valve outlet are connected, and the second condensing trapping separator is high Compression refrigerant outlet is connected with evaporator inlet, the evaporator outlet respectively with the 7th shut-off valve import and the 8th shut-off valve Entrance connection, the 7th cut-off valve outlet are connect with the Recuperative heat exchanger low pressure cryogen entrance, and the Recuperative heat exchanger is low Compression refrigerant outlet is connected with compressor inlet, and the 8th cut-off valve outlet is connect with the second restricting element entrance, institute The outlet of the second restricting element is stated to connect with compressor inlet.
The fan outlet is connected with dry chamber inlet, and the hothouse outlet ends valve inlet, second with first respectively End valve inlet to be connected, the first cut-off valve outlet is dry with the condenser dry air entrance, the Recuperative heat exchanger respectively Air outlet slit connection, the second cut-off valve outlet are connected with the Recuperative heat exchanger wet air inlet, the Recuperative heat exchanger Humid air outlet is connected with the first condensing trapping separator inlet, the first condensing trapping separator outlet and third shut-off valve Entrance, the 4th cut-off valve inlet, the first tapping valve are connected, the 4th cut-off valve outlet and the second wet sky of condensing trapping separator Gas entrance is connected, and the second condensing trapping separator outlet is connected with the second tapping valve, Recuperative heat exchanger dry air entrance, institute It states third cut-off valve outlet to be connected with Recuperative heat exchanger dry air entrance, the Recuperative heat exchanger dry air outlet and condenser are dry Air intake is connected, and the condenser dry air outlet is connected with fans entrance.
In some preferred embodiments, refrigerant of the big temperature of the air-source across high-temperature heat pump drying system is mixing work Matter refrigerant, the mixed working fluid refrigerant include the refrigerant of four warm areas, and the refrigerant of four warm areas includes: low Warm area working medium, normal warm area working medium, intermediate warm area working medium and high-temperature region working medium;Wherein:
The low-temperature space working medium includes ethylene, ethane, fluoroform, Freon 13, carbon dioxide, fluoromethane and complete At least one of fluoroethane;
The normal warm area working medium includes difluoromethane, five fluoromethane, propylene, trifluoroethane, propane, one chloromethane of difluoro Alkane, five fluorine monochlorethanes, fluoroethane, perfluoropropane, ammonia, cyclopropane, dichlorodifluoromethane, tetrafluoropropene, tetrafluoroethane, diformazan Base ether, Difluoroethane, trifluoroiodomethane, heptafluoro-propane, tetrafluoro monochlorethane, trifluoro propene, pentafluoropropene, trifluoro propene and At least one of iso-butane;
The intermediate warm area working medium includes difluoromono-chloroethane, isobutene, butylene, octafluorocyclobutane, perfluorinated butane, hexafluoro Propane, normal butane, tetrafluorodichloroethane, hexafluoropropane, monofluorodichloromethane, neopentane, pentafluoropropane, Freon 13, At least one of one chloropropene of trifluoro, octafluoro butylene, seven fluorine amylenes and trifluorobichloroethane;
The high-temperature region working medium includes isopentane, perfluor pentane, pentane, a fluorine monochlorethane, 3-pentafluorobutane, trifluoro Trichloroethanes, pentamethylene, 2 methylpentanes, hexafluorobutene, Decafluoropentane, at least one of n-hexane and water.
In some preferred embodiments, the molar concentration range of the low-temperature space working medium is 0.05~0.95, positive room temperature The molar concentration range of area's working medium is 0.05~0.95, and the molar concentration range of intermediate warm area working medium is 0.05~0.95, high temperature The molar concentration range of area's working medium is 0.05~0.5.
In some preferred embodiments, the big temperature of the air-source includes preheating mode across high-temperature heat pump drying system, institute It is as follows to state preheating mode working method:
First shut-off valve is opened, and the 5th shut-off valve is opened, and the 7th shut-off valve is opened, and the second shut-off valve is closed, third Shut-off valve is closed, and the 4th shut-off valve is closed, and the 6th shut-off valve is closed, and the 8th shut-off valve is closed, and the second tapping valve is closed, the pressure The high temperature refrigerant of the high-pressure outlet discharge of contracting machine enters the condenser through the 5th shut-off valve and heats air, subsequently into The Recuperative heat exchanger again passes by the first throttle element, and refrigerant is separated by second condensing trapping after throttling After device enter the evaporator, in the evaporator from environment absorb heat, after heat absorption refrigerant through the 7th shut-off valve again The backheat temperature rise with high-pressure refrigerant is realized into Recuperative heat exchanger, and the refrigerant after heating enters the compressor, completes one A heat pump cycle;
The high temperature dry air of the fan outlet enters the hothouse and is preheated, then by first cut-off Valve again passes by after the condenser completes backheat temperature rise and enters blower, completes a warm-up cycle.
In some preferred embodiments, the big temperature of the air-source includes non-winter dryness fortune across high-temperature heat pump drying system The working method of row mode, the non-winter dryness operational mode is as follows:
First shut-off valve is closed, and the third shut-off valve is closed, and the 6th shut-off valve is closed, the 8th cut-off Valve is closed, and first tapping valve is closed, and second tapping valve is closed, and second shut-off valve is opened, the 4th cut-off Valve is opened, and the 5th shut-off valve is opened, and the 7th shut-off valve is opened, the high temperature work of the high-pressure outlet discharge of the compressor Matter enters the condenser heating air through the 5th shut-off valve and again passes by institute subsequently into the Recuperative heat exchanger First throttle element is stated, working medium enters the second condensing trapping separator after throttling, institute's chilling requirement is provided for humid air dehydration, Subsequently into the evaporator, heat is absorbed from environment in evaporator, refrigerant enters through the 7th shut-off valve again after heat absorption Recuperative heat exchanger realizes the backheat temperature rise with high-pressure refrigerant, and the cryogen after heating enters the compressor, completes a heat pump Circulation;
High temperature dry air enters the hothouse dry products through the blower, described in the humid air warp after the completion of drying Second shut-off valve cools down into the Recuperative heat exchanger backheat, then in turn through the first condensing trapping separator, the 4th Enter the second condensing trapping separator after shut-off valve, humid air dehydration, dehydration are realized in the second condensing trapping separator Dry air afterwards sequentially enters the Recuperative heat exchanger, condenser realizes heating, and the dry air after heating enters the wind Machine completes a drying cycles;
When humid air dehydrating amount reaches setting value in the second condensing trapping separator, second tapping valve is opened Complete drain.
In some preferred embodiments, the big temperature of the air-source includes winter dryness operation across high-temperature heat pump drying system The working method of mode, the winter dryness operational mode is as follows:
First shut-off valve is closed, and the 4th shut-off valve is closed, and the 6th shut-off valve is closed, the 8th cut-off Valve is closed, and first tapping valve is closed, and second tapping valve is closed, and second shut-off valve is opened, the third cut-off Valve is opened, and the 5th shut-off valve is opened, and the 7th shut-off valve is opened, the high temperature work of the high-pressure outlet discharge of the compressor Matter enters the condenser through the 5th shut-off valve and heats air, subsequently into the Recuperative heat exchanger, again passes by described the One restricting element, working medium enters the second condensing trapping separator after throttling, provides institute's chilling requirement for humid air dehydration, then Into the evaporator, heat is absorbed from environment in evaporator, refrigerant enters backheat through the 7th shut-off valve again after heat absorption Heat exchanger realizes the backheat temperature rise with high-pressure refrigerant, and the cryogen after heating enters the compressor, completes a heat pump cycle;
High temperature dry air enters the hothouse dry products through the blower, described in the humid air warp after the completion of drying Second shut-off valve cools down into the Recuperative heat exchanger backheat, and when to prevent low circumstance temperature, the second condensation separation trap is dehydrated Journey frosting, the humid air after the completion of drying enter the first condensation separation trap realization and are dehydrated in advance, dewatered dry air The Recuperative heat exchanger, condenser realization heating are sequentially entered, the dry air after heating enters the blower, completes one and do Dry circulation;
When humid air dehydrating amount reaches setting value in the first condensing trapping separator, first tapping valve is opened Complete drain.
In some preferred embodiments, the big temperature of the air-source includes defrosting mode across high-temperature heat pump drying system, institute The working method for stating defrosting mode is as follows:
First shut-off valve is closed, and second shut-off valve is closed, and the 5th shut-off valve is closed, the 7th cut-off Valve is closed, and the 6th shut-off valve is opened, and the 8th shut-off valve is opened, the high temperature work of the high-pressure outlet discharge of the compressor Matter enters the second condensing trapping separator and the evaporator through the 6th shut-off valve, is the second condensing trapping separator And the evaporator defrosting provides high temperature heat, the working medium after defrosting enters the second throttling member by the 8th shut-off valve Enter the compressor after part reducing pressure by regulating flow, completes a heat pump cycle.
The present invention by adopting the above technical scheme the advantages of be:
The big temperature of air-source provided by the invention is slid special across high-temperature heat pump drying system using mixed working fluid phase transition temperature Property, in conjunction with Recuperative heat exchanger is introduced, big temperature is realized across efficient heat supply, and it is dry to provide high temperature using the realization of Conventional press single stage compress Dry institute's calorific requirement, drying temperature is high, and dehydration temperaturre is low, and dehydration efficiency is high, and process is simple, at low cost.
In addition, the big temperature of air-source provided by the invention has preheating mode across high-temperature heat pump drying system, system can be made It is rapidly heated, shortens system preparation time;Also, the above-mentioned big temperature of air-source across high-temperature heat pump drying system there is winter to take off in advance Aqueous mode can prevent under winter low circumstance temperature under the operational mode, and system is dehydrated Shi Yijie in the second condensing trapping separator Frost, the problem of influencing dehydration efficiency, when low circumstance temperature is run in winter, realization is dehydrated in advance in the first condensing trapping device, is promoted Dehydration efficiency;In addition to this, the big temperature of above-mentioned air-source has defrosting mode across high-temperature heat pump drying system, is used for winter evaporator Defrosting guarantees the work of system stability and high efficiency.
In addition, the big temperature of air-source provided by the invention is across high-temperature heat pump drying system, using high temperature drying mode, raw material is dry Dry speed is fast, high-efficient, and when humid air dehydration, is trapped and be dehydrated using cryogenic condensation, dehydration temperaturre is low, and dehydrating effect is good; 80 DEG C or more high temperature outputs can be realized as using conventional refrigerant compressor, system is simple, at low cost.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with Other attached drawings are obtained according to these attached drawings.
Fig. 1 is structural schematic diagram of the big temperature of air-source across high temperature heat pump system that an embodiment provides.
Fig. 2 is preheating mode schematic diagram of the big temperature of air-source across high temperature heat pump system that an embodiment provides.
Fig. 3 is non-winter operation pattern diagram of the big temperature of air-source across high temperature heat pump system that an embodiment provides.
Fig. 4 is winter operation pattern diagram of the big temperature of air-source across high temperature heat pump system that an embodiment provides.
Fig. 5 is defrosting mode schematic diagram of the big temperature of air-source across high temperature heat pump system that an embodiment provides.
Fig. 6 is the preferred fin-tube heat exchanger that an embodiment provides.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other Embodiment shall fall within the protection scope of the present invention.
Embodiment one
Please referring to Fig. 1 is that the embodiment of the present invention one provides a kind of structure of the big temperature of air-source across high-temperature heat pump drying system Schematic diagram, for ease of description, only parts related to embodiments of the present invention are shown, and details are as follows.
The big temperature of air-source provided by the invention includes: compressor 1, blower 7, hothouse 8, steaming across high-temperature heat pump drying system Send out device 6, condenser 2, Recuperative heat exchanger 3, first throttle element 4, the second restricting element 20, the first shut-off valve 9, the second shut-off valve 10, third shut-off valve 12, the 4th shut-off valve 14, the 5th shut-off valve 16, the 6th shut-off valve 17, the cut-off of the 7th shut-off valve the 18, the 8th Valve 19, the first condensing trapping separator 11, the second condensing trapping separator 5, the first tapping valve 13 and the second tapping valve 15.Below The connection relationship of above-mentioned all parts is described in detail.
The high-pressure outlet of the compressor 1 is connect with 16 import of the 5th shut-off valve, 17 import of the 6th shut-off valve respectively, described The high-pressure refrigerant of the company, high-pressure refrigerant entrance institute of 5th shut-off valve 16 outlet and condenser 2, the condenser 2 is exported and is returned The high-pressure refrigerant entrance of heat exchanger 3 is connected, high-pressure refrigerant outlet and the first throttle element 4 of the Recuperative heat exchanger 3 Entrance is connected, and the first throttle element 4 outlet is connected with 5 high-pressure refrigerant entrance of the second condensing trapping separator, and described the The outlet of two condensing trapping separators, 5 high-pressure refrigerant is connected with 6 entrance of evaporator, and the evaporator 6 exports respectively with described the Seven shut-off valve, 18 entrance is connect with 19 entrance of the 8th shut-off valve, and the 7th shut-off valve 18 outlet is low with Recuperative heat exchanger 3 Compression refrigerant entrance is connected, and 3 low pressure refrigerant of the Recuperative heat exchanger outlet is connected with 1 import of compressor, the 6th cut-off The outlet of valve 17 is connect with 5 entrance of the second condensing trapping device, and the 8th shut-off valve 19 outlet enters with second restricting element 20 Mouth connection, the outlet of the second restricting element 20 are connect with 1 import of compressor.
The outlet of blower 7 is connected with 8 entrance of hothouse, and the outlet of hothouse 8 is connected with 10 entrance of the second shut-off valve, Second shut-off valve 10 outlet is connected with 3 wet air inlet of Recuperative heat exchanger, and 3 humid air of Recuperative heat exchanger exports and the One condensing trapping separator, 11 entrance is connected, the first condensing trapping separator 11 outlet and 12 entrance of third shut-off valve, the Four shut-off valve, 14 entrance, the first tapping valve 13 are connected, the 4th shut-off valve 14 outlet and the wet sky of the second condensing trapping separator 5 Gas entrance is connected, the outlet of the second condensing trapping separator 5 and the second tapping valve 15,3 dry air entrance phase of Recuperative heat exchanger Even, the outlet of third shut-off valve 12 is connected with 3 dry air entrance of Recuperative heat exchanger, 3 dry air of the Recuperative heat exchanger outlet It is connected with 2 dry air entrance of condenser, 2 dry air of the condenser outlet is connected with 7 entrance of blower.
In some preferred embodiments, refrigerant of the big temperature of the air-source across high-temperature heat pump drying system is mixing work Matter refrigerant, and the mixed working fluid refrigerant includes the refrigerant of four warm areas, the refrigerant of four warm areas includes: Low-temperature space working medium, normal warm area working medium, intermediate warm area working medium and high-temperature region working medium;Wherein:
The low-temperature space working medium includes ethylene, ethane, fluoroform, Freon 13, carbon dioxide, fluoromethane and complete At least one of fluoroethane;
The normal warm area working medium includes difluoromethane, five fluoromethane, propylene, trifluoroethane, propane, one chloromethane of difluoro Alkane, five fluorine monochlorethanes, fluoroethane, perfluoropropane, ammonia, cyclopropane, dichlorodifluoromethane, tetrafluoropropene, tetrafluoroethane, diformazan Base ether, Difluoroethane, trifluoroiodomethane, heptafluoro-propane, tetrafluoro monochlorethane, trifluoro propene, pentafluoropropene, trifluoro propene and At least one of iso-butane;
The intermediate warm area working medium includes difluoromono-chloroethane, isobutene, butylene, octafluorocyclobutane, perfluorinated butane, hexafluoro Propane, normal butane, tetrafluorodichloroethane, hexafluoropropane, monofluorodichloromethane, neopentane, pentafluoropropane, Freon 13, At least one of one chloropropene of trifluoro, octafluoro butylene, seven fluorine amylenes and trifluorobichloroethane;
The high-temperature region working medium includes isopentane, perfluor pentane, pentane, a fluorine monochlorethane, 3-pentafluorobutane, trifluoro Trichloroethanes, pentamethylene, 2 methylpentanes, hexafluorobutene, Decafluoropentane, at least one of n-hexane and water.
In some preferred embodiments, the molar concentration range of the low-temperature space working medium is 0.05~0.95, positive room temperature The molar concentration range of area's working medium is 0.05~0.95, and the molar concentration range of intermediate warm area working medium is 0.05~0.95, high temperature The molar concentration range of area's working medium is 0.05~0.5.
It is appreciated that the big temperature of air-source provided by the invention across high-temperature heat pump drying system, utilizes the phase transformation of mixed working fluid Slip characteristic improves the Temperature Matching with heat exchanging fluid, and in Recuperative heat exchanger 3, can use mixed working fluid itself Backheat, so that system is conducive to raising efficiency, be advantageously implemented big temperature across.
In some preferred embodiments, the first throttle element 4 and the second restricting element 20 are throttle valve.
In some preferred embodiments, the Recuperative heat exchanger 3 is plate-fin heat exchanger, it will be understood that backheat heat exchange The form without being limited thereto of device 3 can also be wound tube heat exchanger or other kinds of heat exchanger.
Referring to Fig. 6, the structural schematic diagram of the evaporator provided for present pre-ferred embodiments, the evaporator 6 is wing Flat-tube type heat-exchanger, the preferred heat source of the evaporator 6 are air-source.
The big temperature of air-source provided by the invention is slid special across high-temperature heat pump drying system using mixed working fluid phase transition temperature Property, in conjunction with Recuperative heat exchanger is introduced, big temperature is realized across efficient heat supply, and it is dry to provide high temperature using the realization of Conventional press single stage compress Dry institute's calorific requirement, drying temperature is high, and dehydration temperaturre is low, and dehydration efficiency is high, and process is simple, at low cost.
Embodiment two
Referring to Fig. 2, preheating mode schematic diagram of the big temperature of air-source across high temperature heat pump system provided for an embodiment.
The big temperature of air-source includes preheating mode across high-temperature heat pump drying system, and the preheating mode working method is such as Under:
First shut-off valve 9 is opened, and the 5th shut-off valve 16 is opened, and the 7th shut-off valve 18 is opened, and the second shut-off valve 10 closes It closes, third shut-off valve 12 is closed, and the 4th shut-off valve 14 is closed, and the 6th shut-off valve 17 is closed, and the 8th shut-off valve 19 is closed, second row Liquid valve 15 is closed, and the high temperature refrigerant of the high-pressure outlet of the compressor 1 discharge enters described cold through the 5th shut-off valve 16 Condenser 2 heats air and again passes by the first throttle element 4, refrigerant after throttling subsequently into the Recuperative heat exchanger 3 Enter the evaporator 6 after the second condensing trapping separator 5, absorb heat from environment in the evaporator 6, inhales Refrigerant is again introduced into the backheat temperature rise of Recuperative heat exchanger 3 realization and high-pressure refrigerant, heating by the 7th shut-off valve 18 after heat Refrigerant afterwards enters the compressor 1, completes a heat pump cycle;
The high temperature dry air that the blower 7 exports enters the hothouse 8 and is preheated, and then passes through described first section Only valve 9 again pass by after the condenser 2 completes backheat temperature rise and enter blower, complete a warm-up cycle.
It is appreciated that the big temperature of air-source provided in an embodiment of the present invention has preheating mode across high-temperature heat pump drying system, System can be made to be rapidly heated, shorten system preparation time.
Embodiment three
Referring to Fig. 3, non-winter operation mode of the big temperature of air-source across high temperature heat pump system provided for an embodiment Schematic diagram.
The big temperature of air-source includes non-winter dryness operational mode, the non-winter dryness across high-temperature heat pump drying system The working method of operational mode is as follows:
First shut-off valve 9 is closed, and the third shut-off valve 12 is closed, and the 6th shut-off valve 17 is closed, and described the Eight shut-off valves 19 are closed, and first tapping valve 13 is closed, and second tapping valve 15 is closed, and second shut-off valve 15 is beaten It opens, the 4th shut-off valve 14 is opened, and the 5th shut-off valve 16 is opened, and the 7th shut-off valve 18 is opened, the compressor 1 The high temperature refrigerant of high-pressure outlet discharge enter the condenser 2 through the 5th shut-off valve 16 and heat air, subsequently into The Recuperative heat exchanger 3 again passes by the first throttle element 4, and working medium is separated into second condensing trapping after throttling Device 5 provides institute's chilling requirement for humid air dehydration, subsequently into the evaporator 6, absorbs heat from environment in evaporator 6, inhale Refrigerant enters the backheat temperature rise of Recuperative heat exchanger 3 realization and high-pressure refrigerant through the 7th shut-off valve 18 again after heat, rises Cryogen after temperature enters the compressor 1, completes a heat pump cycle;
High temperature dry air enters 8 dry products of hothouse through the blower 7, and the humid air after the completion of drying is through institute It states the second shut-off valve 10 and enters 3 backheat of Recuperative heat exchanger cooling, then in turn through the first condensing trapping separator 11, enter the second condensing trapping separator 5 after the 4th shut-off valve 14, realize wet sky in the second condensing trapping separator 5 Qi exhaustion water, dewatered dry air sequentially enters 3 devices of the backheat heat exchange, condenser 2 realizes heating, dry empty after heating Gas enters the blower 7, completes a drying cycles;
When humid air dehydrating amount reaches setting value in the second condensing trapping separator 5, second drain is opened Valve 15 completes drain.
Example IV
Referring to Fig. 4, showing for the big temperature of air-source that an embodiment provides across the winter operation mode of high temperature heat pump system It is intended to.
The big temperature of air-source includes winter dryness operational mode across high-temperature heat pump drying system, the winter dryness operation The working method of mode is as follows:
First shut-off valve 9 is closed, and the 4th shut-off valve 14 is closed, and the 6th shut-off valve 17 is closed, and described the Eight shut-off valves 19 are closed, and first tapping valve 13 is closed, and second tapping valve 15 is closed, and second shut-off valve 10 is beaten It opens, the third shut-off valve 12 is opened, and the 5th shut-off valve 16 is opened, and the 7th shut-off valve 18 is opened, the compressor 1 The high temperature refrigerant of high-pressure outlet discharge enter the condenser 2 through the 5th shut-off valve 16 and heat air, subsequently into described Recuperative heat exchanger 3 again passes by the first throttle element 4, and refrigerant passes through the second condensing trapping separator after throttling 5, subsequently into the evaporator 6, heat is absorbed from environment in evaporator 6, is entered again through the 7th shut-off valve 18 after heat absorption Recuperative heat exchanger 3 realizes the backheat temperature rise with high-pressure refrigerant, and the refrigerant after heating enters the compressor 1, completes one Heat pump cycle;
High temperature dry air enters 8 dry products of hothouse through the blower 7, and the humid air after the completion of drying is through institute It states the second shut-off valve 10 and enters 3 backheat of Recuperative heat exchanger cooling, when to prevent low circumstance temperature, second condenses and separates trap 5 Dehydration frosting, the humid air after the completion of drying enters the first condensation separation realization of trap 11 and is dehydrated in advance, dewatered Dry air sequentially enters the Recuperative heat exchanger 3, condenser 2 realizes heating, and the dry air after heating enters the blower 7, complete a drying cycles;
When humid air dehydrating amount reaches setting value in the first condensing trapping separator 11, first drain is opened Valve 13 completes drain.
It is appreciated that the big temperature of air-source that the above embodiment of the present invention provides is across high-temperature heat pump drying system, realization is the It is dehydrated in advance in 11 in one condensing trapping device, improves dehydration efficiency.
It is appreciated that the big temperature of air-source provided by the above embodiment across high-temperature heat pump drying system there is winter to be dehydrated in advance Mode can prevent under winter low circumstance temperature under the operational mode, system easy frosting when being dehydrated in the second condensing trapping separator, The problem of influencing dehydration efficiency, when low circumstance temperature is run in winter, realization is dehydrated in advance in the first condensing trapping device, promotes dehydration Efficiency.
Embodiment five
Referring to Fig. 6, defrosting mode schematic diagram of the big temperature of air-source across high temperature heat pump system provided for an embodiment.
The big temperature of air-source includes defrosting mode across high-temperature heat pump drying system, and the working method of the defrosting mode is such as Under:
First shut-off valve 9 is closed, and second shut-off valve 10 is closed, and the 5th shut-off valve 16 is closed, and described the Seven shut-off valves 18 are closed, and the 6th shut-off valve 17 is opened, and the 8th shut-off valve 19 is opened, and the high of the compressor 1 extrudes The high temperature refrigerant of mouth discharge enters the second condensing trapping separator 5 and the evaporator 6 through the 6th shut-off valve 17, is described Second condensing trapping separator 5 and the defrosting of the evaporator 6 provide high temperature heat, and the working medium after defrosting is by the 8th cut-off Valve 19 enters the compressor 1 after entering 20 reducing pressure by regulating flow of the second restricting element, completes a heat pump cycle.
It is appreciated that the big temperature of air-source that the above embodiment of the present invention provides has defrosting mould across high-temperature heat pump drying system Formula defrosts for winter evaporator, guarantees the work of system stability and high efficiency.
Certainly the big temperature of air-source of the invention can also have a variety of transformation and remodeling across high-temperature heat pump drying system, not office It is limited to the specific structure of above embodiment.In short, protection scope of the present invention should include those for ordinary skill It obviously converts or substitutes and retrofit for personnel.

Claims (7)

1. a kind of big temperature of air-source is across high-temperature heat pump drying system characterized by comprising compressor, blower, hothouse, steaming Device, condenser, Recuperative heat exchanger, first throttle element, the second restricting element, the first shut-off valve, the second shut-off valve, third is sent out to cut Only valve, the 4th shut-off valve, the 5th shut-off valve, the 6th shut-off valve, the 7th shut-off valve, the 8th stop valve, the separation of the first condensing trapping Device, the second condensing trapping separator, the first tapping valve and the second tapping valve, in which:
The high-pressure outlet of the compressor is connect with the 5th shut-off valve import, the 6th shut-off valve import respectively, the 5th cut-off The company, high-pressure refrigerant entrance institute of valve outlet and condenser, the 6th cut-off valve outlet and the second condensing trapping device high pressure cryogen The high-pressure refrigerant outlet of entrance connection, the condenser is connected with the high-pressure refrigerant entrance of Recuperative heat exchanger, the backheat The high-pressure refrigerant outlet of heat exchanger is connected with first throttle element inlet, and the first throttle component outlet is cold with second respectively Solidifying trapping separator high pressure refrigerant inlet and the 6th cut-off valve outlet are connected, the second condensing trapping separator high pressure system Cryogen outlet is connected with evaporator inlet, and the evaporator outlet ends valve inlet with the 7th shut-off valve import and the 8th respectively Connection, the 7th cut-off valve outlet are connect with the Recuperative heat exchanger low pressure cryogen entrance, the Recuperative heat exchanger low pressure system Cryogen outlet is connected with compressor inlet, and the described 8th ends valve outlet connect with the second restricting element entrance, and described the The outlet of two restricting elements is connect with compressor inlet;
The fan outlet is connected with dry chamber inlet, and the hothouse outlet ends with the first cut-off valve inlet, second respectively Valve inlet be connected, it is described first cut-off valve outlet respectively with the condenser dry air entrance, the Recuperative heat exchanger dry air Outlet connection, the second cut-off valve outlet are connected with the Recuperative heat exchanger wet air inlet, the wet sky of Recuperative heat exchanger Gas outlet is connected with the first condensing trapping separator inlet, and the first condensing trapping separator outlet enters with third shut-off valve Mouth, the 4th cut-off valve inlet, the first tapping valve are connected, the 4th cut-off valve outlet and the second condensing trapping separator humid air Entrance is connected, and the second condensing trapping separator outlet is connected with the second tapping valve, Recuperative heat exchanger dry air entrance, described Third cut-off valve outlet is connected with Recuperative heat exchanger dry air entrance, the Recuperative heat exchanger dry air outlet and the dry sky of condenser Gas entrance is connected, and the condenser dry air outlet is connected with fans entrance.
2. the big temperature of air-source as described in claim 1 is across high-temperature heat pump drying system, which is characterized in that the big temperature of air-source Refrigerant across high-temperature heat pump drying system is mixed working fluid refrigerant, and the mixed working fluid refrigerant includes four warm areas Refrigerant, the refrigerant of four warm areas include: low-temperature space working medium, normal warm area working medium, intermediate warm area working medium and high-temperature region Working medium;Wherein:
The low-temperature space working medium includes ethylene, ethane, fluoroform, Freon 13, carbon dioxide, fluoromethane and perfluor second At least one of alkane;
The normal warm area working medium includes difluoromethane, five fluoromethane, propylene, trifluoroethane, propane, monochlorodifluoromethane, five Fluorine monochlorethane, fluoroethane, perfluoropropane, ammonia, cyclopropane, dichlorodifluoromethane, tetrafluoropropene, tetrafluoroethane, dimethyl second Ether, Difluoroethane, trifluoroiodomethane, heptafluoro-propane, tetrafluoro monochlorethane, trifluoro propene, pentafluoropropene, trifluoro propene and isobutyl At least one of alkane;
The intermediate warm area working medium includes difluoromono-chloroethane, isobutene, butylene, octafluorocyclobutane, perfluorinated butane, hexafluoro third Alkane, normal butane, tetrafluorodichloroethane, hexafluoropropane, monofluorodichloromethane, neopentane, pentafluoropropane, Freon 13, three At least one of one chloropropene of fluorine, octafluoro butylene, seven fluorine amylenes and trifluorobichloroethane;
The high-temperature region working medium includes isopentane, perfluor pentane, pentane, a fluorine monochlorethane, 3-pentafluorobutane, trifluoro trichlorine Ethane, pentamethylene, 2 methylpentanes, hexafluorobutene, Decafluoropentane, at least one of n-hexane and water.
3. the big temperature of air-source as claimed in claim 2 is across high-temperature heat pump drying system, which is characterized in that the low-temperature space working medium Molar concentration range be 0.05~0.95, the molar concentration range of normal warm area working medium is 0.05~0.95, intermediate warm area work The molar concentration range of matter is 0.05~0.95, and the molar concentration range of high-temperature region working medium is 0.05~0.5.
4. the big temperature of air-source as described in claim 1 is across high-temperature heat pump drying system, which is characterized in that the big temperature of air-source Include preheating mode across high-temperature heat pump drying system, the preheating mode working method is as follows:
First shut-off valve is opened, and the 5th shut-off valve is opened, and the 7th shut-off valve is opened, and the second shut-off valve is closed, third cut-off Valve is closed, and the 4th shut-off valve is closed, and the 6th shut-off valve is closed, and the 8th shut-off valve is closed, and the second tapping valve is closed, the compressor The high temperature refrigerant of high-pressure outlet discharge enter the condenser through the 5th shut-off valve and heat air, subsequently into described Recuperative heat exchanger again passes by the first throttle element, and refrigerant is after the second condensing trapping separator after throttling Into the evaporator, heat is absorbed from environment in the evaporator, refrigerant is again introduced into through the 7th shut-off valve after heat absorption Recuperative heat exchanger realizes the backheat temperature rise with high-pressure refrigerant, and the refrigerant after heating enters the compressor, completes a heat Pump circulation;
The high temperature dry air of the fan outlet enters the hothouse and is preheated, and then passes through first shut-off valve, It again passes by after the condenser completes backheat temperature rise and enters blower, complete a warm-up cycle.
5. the big temperature of air-source as described in claim 1 is across high-temperature heat pump drying system, which is characterized in that the big temperature of air-source It include non-winter dryness operational mode across high-temperature heat pump drying system, the working method of the non-winter dryness operational mode is such as Under:
First shut-off valve is closed, and the third shut-off valve is closed, and the 6th shut-off valve is closed, and the 8th shut-off valve closes It closes, first tapping valve is closed, and second tapping valve is closed, and second shut-off valve is opened, and the 4th shut-off valve is beaten It opens, the 5th shut-off valve is opened, and the 7th shut-off valve is opened, the high temperature refrigerant warp of the high-pressure outlet discharge of the compressor 5th shut-off valve enters the condenser and heats air, subsequently into the Recuperative heat exchanger, again passes by described the One restricting element, working medium enters the second condensing trapping separator after throttling, provides institute's chilling requirement for humid air dehydration, then Into the evaporator, heat is absorbed from environment in evaporator, refrigerant enters backheat through the 7th shut-off valve again after heat absorption Heat exchanger realizes the backheat temperature rise with high-pressure refrigerant, and the cryogen after heating enters the compressor, completes a heat pump cycle;
High temperature dry air enters the hothouse dry products through the blower, and the humid air after the completion of drying is through described second Shut-off valve cools down into the Recuperative heat exchanger backheat, then in turn through the first condensing trapping separator, the 4th cut-off Enter the second condensing trapping separator after valve, humid air dehydration is realized in the second condensing trapping separator, it is dewatered Dry air sequentially enters the Recuperative heat exchanger, condenser realizes heating, and the dry air after heating enters the blower, complete At a drying cycles;
When humid air dehydrating amount reaches setting value in the second condensing trapping separator, opens second tapping valve and complete Drain.
6. the big temperature of air-source as described in claim 1 is across high-temperature heat pump drying system, which is characterized in that the big temperature of air-source Include winter dryness operational mode across high-temperature heat pump drying system, the working method of the winter dryness operational mode is as follows:
First shut-off valve is closed, and the 4th shut-off valve is closed, and the 6th shut-off valve is closed, and the 8th shut-off valve closes It closes, first tapping valve is closed, and second tapping valve is closed, and second shut-off valve is opened, and the third shut-off valve is beaten It opens, the 5th shut-off valve is opened, and the 7th shut-off valve is opened, the high temperature refrigerant warp of the high-pressure outlet discharge of the compressor 5th shut-off valve enters the condenser heating air and again passes by the first segment subsequently into the Recuperative heat exchanger Fluid element, working medium enters the second condensing trapping separator after throttling, provides institute's chilling requirement for humid air dehydration, subsequently into The evaporator absorbs heat from environment in evaporator, and refrigerant enters backheat heat exchange through the 7th shut-off valve again after heat absorption Device realizes the backheat temperature rise with high-pressure refrigerant, and the cryogen after heating enters the compressor, completes a heat pump cycle;
High temperature dry air enters the hothouse dry products through the blower, and the humid air after the completion of drying is through described second Shut-off valve cools down into the Recuperative heat exchanger backheat, and when to prevent low circumstance temperature, second condenses and separates trap dehydration knot Frost, the humid air after the completion of drying enter the first condensation separation trap realization and are dehydrated in advance, and dewatered dry air is successively Heating is realized into the Recuperative heat exchanger, condenser, and the dry air after heating enters the blower, completes a drying and follows Ring;
When humid air dehydrating amount reaches setting value in the first condensing trapping separator, opens first tapping valve and complete Drain.
7. the big temperature of air-source as described in claim 1 is across high-temperature heat pump drying system, which is characterized in that the big temperature of air-source Include defrosting mode across high-temperature heat pump drying system, the working method of the defrosting mode is as follows:
First shut-off valve is closed, and second shut-off valve is closed, and the 5th shut-off valve is closed, and the 7th shut-off valve closes It closes, the 6th shut-off valve is opened, and the 8th shut-off valve is opened, the high temperature refrigerant warp of the high-pressure outlet discharge of the compressor 6th shut-off valve enters the second condensing trapping separator and the evaporator, for the second condensing trapping separator and institute It states evaporator defrosting and high temperature heat is provided, the working medium after defrosting enters the second restricting element section by the 8th shut-off valve Enter the compressor after stream decompression, completes a heat pump cycle.
CN201910127889.2A 2019-02-20 2019-02-20 Air source large-temperature cross-high-temperature heat pump drying system Active CN109827419B (en)

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