CN205119757U - Multistage heat recovery air -source heat pump drying -machine - Google Patents

Multistage heat recovery air -source heat pump drying -machine Download PDF

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Publication number
CN205119757U
CN205119757U CN201520929599.7U CN201520929599U CN205119757U CN 205119757 U CN205119757 U CN 205119757U CN 201520929599 U CN201520929599 U CN 201520929599U CN 205119757 U CN205119757 U CN 205119757U
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heat
evaporimeter
air
working medium
condenser
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CN201520929599.7U
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廖国栋
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廖国栋
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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
    • 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
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Abstract

The utility model discloses a multistage heat recovery air -source heat pump drying -machine, include: the host computer body, internal heat recovery accumulator, drying system, benefit temperature system, dehumidification system, new trend dehumidification system, the heat recovery system of being equipped with of host computer. Be equipped with the inner bag in the heat recovery accumulator, the inner bag divide into the two parts that do not communicate with the heat recovery accumulator, be in the inner bag between gas -liquid separation, and the inner bag is outer, be between the working medium stock solution in the heat recovery accumulator, and the winding has the temperature of biography pipe on the inner bag outer wall, and the one end and the gas -liquid separation that pass the temperature pipe are linked together within a definite time. Compare prior art, through many times to the very big improvement of the recovery of heat energy in the air work efficiency, practiced thrift the energy.

Description

Multi-stage heat reclaims air energy heat pump dryer
Technical field
The utility model relates to art of heat pumps, and particularly a kind of Multi-stage heat reclaims air energy heat pump dryer.
Background technology
Along with the propelling of the comprehensive improvement work of coal-burning boiler, the air energy energy of high-efficiency cleaning is just becoming the new lover of drying field, air energy industry green, energy-saving and environmental protection, non-exhaust emission, not contaminated air are one of best substitute of traditional coal fired boiler class drying plant.
Air energy heat pump, according to inverse Carnot's principle work, by compressor assembly operation, absorbs heat in air and manufactures surface heat energy.Its flow process existing is roughly: working medium enters evaporimeter, and work heat absorption evaporation in evaporimeter, and now working medium enters compressor absorb heat from low-temperature heat source after; Working medium enters condenser after the compression, intensification of compressor, passes to air at condenser heat; High-pressure working medium again enters evaporimeter after reducing pressure by regulating flow, with this continuous periodic duty.But also there is many problems in now widely used dryer:
(1), in heated material process, there is row's warm air mouth in heat preservation and dryness storehouse, in the damp-heat air discharging directly into atmosphere containing large energy, causes the waste of the energy.
(2) mend new wind process without air preheating, make heating process slow.
(3) mend new wind process and directly introduce air, the wet moisture simultaneously in air is also introduced in dry storehouse, reduces drying efficiency.
(4) without cold-producing medium waste heat recovery, machine is in summer high temperature environment, and refrigerant temperature is too high, even can reach 55 DEG C, consumes energy high, machine cisco unity malfunction.
(5) machine is when environment temperature is low in the winter time, and excessively cold cold-producing medium makes compressor have the wet existence run, and affects service efficiency and the life-span of compressor.
Utility model content
For solving above-mentioned Problems existing, the utility model provides a kind of Multi-stage heat and reclaims air energy heat pump dryer.
Multi-stage heat reclaims air energy heat pump dryer, comprising: main body, is provided with recuperation of heat holder, drying system, benefit temperature system, dehumidification system, fresh air dehumidifying system, heat recovery system in main body.
Inner bag is provided with in recuperation of heat holder, recuperation of heat holder is divided into disconnected two parts by inner bag, for between gas-liquid separation in inner bag, inner bag is outer, recuperation of heat holder is interior is between working medium liquid storage, inner bladder outer wall is wound with and passes temperature pipe, the one end passing warm pipe is only connected with between gas-liquid separation, all contains working medium between gas-liquid separation and in working medium liquid storage.
Drying system comprises: condenser, secondary condenser, compressor, oven dry blower fan, be connected by pipeline successively between gas-liquid separation, between compressor, condenser, secondary condenser, working medium liquid storage, condenser is corresponding with drying the position of blower fan and make to dry blower fan and air is flowed through condenser be blown into heat preservation and dryness storehouse.
Mend warm system to comprise: evaporimeter, electric expansion valve, benefit warm air machine, between working medium liquid storage, electric expansion valve, evaporimeter, to be connected by pipeline successively between gas-liquid separation, benefit warm air machine is corresponding with evaporimeter to be arranged, and the air that benefit warm air machine is blown into flows through evaporimeter.
Dehumidification system comprises: ventilating duct, is provided with wet-emitting blower in ventilating duct, and two ends corresponding heat preservation and dryness storehouse and the evaporimeter respectively of ventilation shaft, makes wet-emitting blower the air in the heat preservation and dryness storehouse of blowout can be flowed through evaporimeter.
Fresh air dehumidifying system comprises: the first capillary, secondary evaporimeter, fresh air dehumidification blower fan, between working medium liquid storage, the first capillary, secondary evaporimeter, to be connected by pipeline successively between gas-liquid separation, fresh air dehumidification blower fan position is corresponding with secondary evaporimeter, makes the air be blown into by fresh air dehumidification blower fan can flow through secondary evaporimeter and finally be blown into heat preservation and dryness storehouse.
Heat recovery system comprises: temperature sensing device, the second capillary, and between working medium liquid storage, the second capillary, pass temperature pipe and be connected by pipeline successively, temperature sensing device is arranged on recuperation of heat holder for detecting the temperature of working medium in working medium liquid storage.
Preferably, recuperation of heat holder is provided with electromagnetic three-way, and the entrance of electromagnetic three-way is connected with between working medium liquid storage, outlet respectively with mend the electric expansion valve of warm system, the first capillary of fresh air dehumidifying system, the second capillary of heat recovery system be connected.
Preferably, device for drying and filtering is provided with between working medium liquid storage and between secondary condenser.
Preferably, oil eliminator is provided with between compressor and condenser.
Preferably, temperature-detecting device is provided with in heat preservation and dryness storehouse.
Preferably, deep bead is provided with in ventilating duct.
Preferably, deep bead is provided with level detecting apparatus, to level detecting apparatus for controlling the opening degree of deep bead.
Preferably, main body is provided with artificial PLC controller.
Preferably, pipeline and biography Wen Guanwei copper pipe.
Preferably, drip tray is provided with below evaporimeter.
Compared with prior art, the utility model has the following advantages:
(1) air containing amount of heat can not directly be discharged in air, but continues to be utilized by this device, has saved the energy, has improve drying efficiency.
(2) preheat in supplementary new wind process, overall heating process is accelerated.
(3) to mend in new wind process fresh air dehumidification, improve drying efficiency.
(4) heat recovery system can reclaim the waste heat of working medium, even if ensure that this device also cannot can not work because of refrigerant pressure temperature too high causing in the environment of summer high temperature.
(5), when working under low temperature environment in the winter time, can not there is the too low compressor inside that causes of Temperature of Working has water to affect the problem of compressor service efficiency.
Accompanying drawing explanation
Fig. 1 is structure principle chart of the present utility model.
Fig. 2 is recuperation of heat memory overall structure schematic diagram.
Wherein, mark corresponding parts name in accompanying drawing to be called: 101-compressor, 102-oil eliminator, 103-condenser, 104-dries blower fan, 105-secondary condenser, 201-electric expansion valve, 202-evaporimeter, 203-mends warm air machine, 301-ventilating duct, 302-wet-emitting blower, 303-deep bead, 401-first capillary, the secondary evaporimeter of 402-, 403-fresh air dehumidification blower fan, 501-second capillary, 6-electromagnetic three-way, 7-recuperation of heat holder, between 701-gas-liquid separation, between 702-working medium liquid storage, 703-passes temperature pipe, 8-temperature-detecting device.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in further detail, and embodiment of the present utility model includes but not limited to the following example.
Embodiment
Multi-stage heat reclaims air energy heat pump dryer, comprising: main body, is provided with recuperation of heat holder 7, drying system, benefit temperature system, dehumidification system, fresh air dehumidifying system, heat recovery system in main body.
Inner bag is provided with in recuperation of heat holder 7, recuperation of heat holder is divided into disconnected two parts by inner bag, for between gas-liquid separation 701 in inner bag, inner bag is outer, be between working medium liquid storage 702 in recuperation of heat holder 7, inner bladder outer wall is wound with and passes warm pipe 703, the one end passing warm pipe 703 only 701 to be connected with between gas-liquid separation, and all contain working medium in 702 between 701 and working medium liquid storage between gas-liquid separation, working medium is here condensing agent.
Drying system comprises: condenser 103, secondary condenser 105, compressor 101, oven dry blower fan 104, between gas-liquid separation 701, between compressor 101, condenser 103, secondary condenser 105, working medium liquid storage, 702 are connected by pipeline successively, and condenser 103 is corresponding with the position of drying blower fan 104 and make to dry blower fan 104 and air is flowed through condenser 103 be blown into heat preservation and dryness storehouse.
Low-quality heat energy drawn by cold-producing medium from air, through compressor 101, compression refrigerant gas, at compressor 101 high-pressure outlet, form the gaseous steam of HTHP, through oil eliminator 102, isolate refrigeration lubricant, refrigerant vapour flows to knockout, point multichannel enters condenser 103, the copper pipe heating of condenser 103, dry blower fan 104 and the hot-air around the copper pipe of condenser 103 is blown into heat preservation and dryness storehouse, the air of heating and thermal insulation dryness storehouse and material, the temperature of air raises gradually, taken away the heat of refrigerant vapour simultaneously, wherein some refrigerant starts liquefaction.Cold-producing medium synthesizes a road through liquid trap, secondary condenser 105 is connected to by copper pipe, secondary condenser 105 continues release heat energy, cold-producing medium in copper pipe is liquefied further, liquefied refrigerant flows through device for drying and filtering, filter the moisture in cold-producing medium and impurity, make pure cold-producing medium enter between working medium liquid storage 702 and store.
Mend warm system to comprise: evaporimeter 202, electric expansion valve 201, benefit warm air machine 203, between working medium liquid storage 702, electric expansion valve 201, evaporimeter 202,701 to be connected by pipeline successively between gas-liquid separation, benefit warm air machine 203 is corresponding with evaporimeter 202 to be arranged, and the air that benefit warm air machine 203 is blown into flows through evaporimeter 202, wherein, the flow of electric expansion valve 201 Main Function restriction cold-producing medium process, make cold-producing medium in condenser 103, have the time stopped fully, release heat energy, be convenient to refrigerant liquefaction, form certain pressure simultaneously, due to the throttling action of electric expansion valve 201, cold-producing medium is poor at electric expansion valve 201 two ends mineralization pressure, electric expansion valve 201 exit cold-producing medium forms low temperature liquid cold-producing medium, be divided into the connection of multichannel copper pipe through knockout and enter evaporimeter 202, because the internal copper tube space volume of evaporimeter 202 increases, refrigerant liquid absorbs the copper pipe wall of evaporimeter 202 and the heat energy of surrounding air fast, form gaseous refrigerant, copper pipe surface temperature reduces fast, at this moment corresponding with evaporimeter 202 benefit warm air machine 203 carries out cross-ventilation by force, suck new air, the heat energy of new air accelerates the vaporization of cold-producing medium, cold-producing medium completely after vaporization finally to flow between gas-liquid separation 701.The air entry of compressor 101 also 701 to be connected with between gas-liquid separation, and cold-producing medium forms a closed circuit.
Dehumidification system comprises: ventilating duct 301, is provided with wet-emitting blower 302 in ventilating duct 301, and two ends corresponding heat preservation and dryness storehouse and the evaporimeter 202 respectively of ventilation shaft, makes wet-emitting blower 302 air in the heat preservation and dryness storehouse of blowout can be flowed through evaporimeter 202.
Fresh air dehumidifying system comprises: the first capillary 401, secondary evaporimeter 402, fresh air dehumidification blower fan 403, between working medium liquid storage between the 702, first capillary 401, secondary evaporimeter 402, gas-liquid separation 701 successively by pipeline be connected, fresh air dehumidification blower fan 403 position is corresponding with secondary evaporimeter 402, makes the air be blown into by fresh air dehumidification blower fan 403 can flow through secondary evaporimeter 402 and finally be blown into heat preservation and dryness storehouse; Liquid refrigerant pipeline enters the arrival end of the first capillary 401, it is now normal temperature high voltage liquid refrigerant, the pipe path of the first capillary 401 has limit, the first capillary 401 to go out interruption-forming certain pressure poor, liquid refrigerant flows out the first capillary 401, enters secondary evaporimeter 402, because the copper pipe volume of secondary evaporimeter 402 increases, liquid refrigerant absorbs the heat energy of copper pipe wall and surrounding air, fast vaporizing.Because dry storehouse is sealing state, the hot and humid gas in drying shed discharged by wet-emitting blower 302, just outdoor air must be supplemented, air is when secondary evaporimeter 402, hydrone loses heat energy, and liquefy water, discharges, the air entering hothouse is like this dry, saves the heat of heating moisture.
Heat recovery system comprises: temperature sensing device, the second capillary 501,702, second capillary 501 between working medium liquid storage, pass warm pipe 703 and be connected by pipeline successively, temperature sensing device is arranged on recuperation of heat holder 7 for detecting between working medium liquid storage the temperature of working medium in 702.
Recuperation of heat holder 7 is provided with electromagnetic three-way 6, the entrance of electromagnetic three-way 6 702 to be connected with between working medium liquid storage, outlet respectively with mend the electric expansion valve 201 of warm system, the first capillary 401 of fresh air dehumidifying system, the second capillary 501 of heat recovery system be connected, makes the cold-producing medium of between working medium liquid storage 702 can flow into benefit warm system, fresh air dehumidifying system, heat recovery system respectively by three of electromagnetic three-way 6 outlet.
Device for drying and filtering is provided with between 702 and secondary condenser 105 between working medium liquid storage.Device for drying and filtering mainly plays the effect of contaminant filter.
Oil eliminator 102 is provided with between compressor 101 and condenser 103.The effect of oil eliminator 102 is that the lubricating oil in the high steam of being discharged by refrigeration compressor 101 is separated, and runs safely and efficiently with assurance device.According to point oily principle reducing air velocity and change airflow direction, the elaioleucite in high steam is separated under gravity.Diameter contained in steam, at below 1m/s, just can be separated at the elaioleucite of more than 0.2mm by general air velocity.
Temperature-detecting device 8 is provided with in heat preservation and dryness storehouse.
Be provided with deep bead 303 in ventilating duct 301, be used for controlling the opening and closing of ventilating duct 301.
Deep bead 303 is provided with level detecting apparatus, to level detecting apparatus for controlling the opening degree of deep bead 303.
Main body is provided with artificial PLC controller, in order to control each system, realizes the intelligent operation of this device.
Pipeline and the warm pipe 703 of biography are copper pipe, and the biography warm nature matter of copper is fine, and price is relatively cheap, are the materials extensively adopted on the market.
Be provided with drip tray below evaporimeter 202, be used for collecting the aqueous water that stays of condensation.
The present embodiment also comprises the high-low pressure table be arranged on main body, high-low voltage relay, heat absorption relay; high-low pressure table is for detecting refrigerant pressure; high-low voltage relay is used for protecting this device to work in the voltage range of setting, and heat absorption relay protection equipment works in the caloric receptivity of setting.
In the present embodiment, when temperature-detecting device 8 detects that in heat preservation and dryness storehouse, temperature reaches 50 DEG C, dehumidification system and fresh air dehumidifying system are started working, and its operation principle is as follows:
Dehumidification system: when temperature-detecting device 8 detects that in heat preservation and dryness storehouse, temperature reaches design temperature, deep bead 303 is opened thus is opened ventilation duct, wet-emitting blower 302 starts, discharge the hot and humid gas in heat preservation and dryness storehouse, flow through evaporimeter 202, evaporimeter 202 absorbs the heat energy of the air of discharging from storehouse, dry storehouse, and the vaporous water of damp-heat air is liquefied as aqueous water on evaporimeter 202 surface and flows out in the drip tray below main body to evaporimeter 202.
Fresh air dehumidifying system: when temperature sensing device detects that in heat preservation and dryness storehouse, temperature reaches design temperature, fresh air dehumidifying system is opened, working medium is introduced into the first capillary 401 and then flows into secondary evaporimeter 402, vaporize in secondary evaporimeter 402 and absorb heat, fresh air dehumidification blower fan 403 suction chamber outer air when flowing through secondary evaporimeter 402, the vaporous water in the air of suction loses heat energy, becomes aqueous water, flow out main body, make the air entering heat preservation and dryness storehouse be dry.
In the present embodiment, the operation principle of heat recovery system is as follows:
When environment temperature height in summer, the liquid refrigerant that condenser 103 flows into, temperature increases.Temperature sensing device temperature setting range on recuperation of heat memory is 27 DEG C to 32 DEG C, when temperature sensing device to sense between working medium liquid storage that 702 reach 32 DEG C, heat recovery system is started working, flow of refrigerant is through the second capillary 501 step-down, flow into again and pass warm pipe 703, the heat of absorption refrigeration agent, refrigerant heats vaporization heat absorption, after absorbing heat, get back to 701 formation circulations between gas-liquid separation.When detecting that cold-producing medium quits work lower than heat recovery system when 27 DEG C.
According to above-described embodiment, just the utility model can be realized well.What deserves to be explained is; under prerequisite based on said structure design; for solving same technical problem; even if some making on the utility model are without substantial change or polishing; the essence of the technical scheme adopted is still the same with the utility model, therefore it also should in protection domain of the present utility model.

Claims (10)

1. Multi-stage heat reclaims air energy heat pump dryer, it is characterized in that, comprising: main body, pipeline, be provided with recuperation of heat holder (7), drying system, benefit temperature system, dehumidification system, fresh air dehumidifying system, heat recovery system in main body;
Recuperation of heat holder is provided with inner bag in (7), recuperation of heat holder (7) is divided into disconnected two parts by inner bag, for between gas-liquid separation (701) in inner bag, inner bag is outer, recuperation of heat holder (7) is interior is (702) between working medium liquid storage, inner bladder outer wall is wound with and passes temperature pipe (703), the one end passing temperature pipe (703) is only connected with (701) between gas-liquid separation, all contains working medium between gas-liquid separation between (701) and working medium liquid storage in (702);
Drying system comprises: condenser (103), secondary condenser (105), compressor (101), oven dry blower fan (104), between gas-liquid separation, between (701), compressor (101), condenser (103), secondary condenser (105), working medium liquid storage, (702) are connected by pipeline successively, and condenser (103) is corresponding with the position of oven dry blower fan (104) and make to dry blower fan (104) and air is flowed through condenser (103) be blown into heat preservation and dryness storehouse;
Mend warm system to comprise: evaporimeter (202), electric expansion valve (201), benefit warm air machine (203), between working medium liquid storage, between (702), electric expansion valve (201), evaporimeter (202), gas-liquid separation, (701) are connected by pipeline successively, benefit warm air machine (203) is corresponding with evaporimeter (202) to be arranged, and the air that benefit warm air machine (203) is blown into flows through evaporimeter (202);
Dehumidification system comprises: ventilating duct (301), wet-emitting blower (302) is provided with in ventilating duct (301), two ends corresponding heat preservation and dryness storehouse and the evaporimeter (202) respectively of ventilation shaft, makes wet-emitting blower (302) air in the heat preservation and dryness storehouse of blowout can be flowed through evaporimeter (202);
Fresh air dehumidifying system comprises: the first capillary (401), secondary evaporimeter (402), fresh air dehumidification blower fan (403), between working medium liquid storage, between (702), the first capillary (401), secondary evaporimeter (402), gas-liquid separation, (701) are connected by pipeline successively, fresh air dehumidification blower fan (403) position is corresponding with secondary evaporimeter (402), makes the air be blown into by fresh air dehumidification blower fan (403) can flow through secondary evaporimeter (402) and finally be blown into heat preservation and dryness storehouse;
Heat recovery system comprises: temperature sensing device, the second capillary (501), between working medium liquid storage, (702), the second capillary (501), biography temperature pipe (703) are connected by pipeline successively, and temperature sensing device is arranged on recuperation of heat holder (7) for detecting the temperature of (702) interior working medium between working medium liquid storage.
2. Multi-stage heat according to claim 1 reclaims air energy heat pump dryer, it is characterized in that, recuperation of heat holder (7) is provided with electromagnetic three-way (6), the entrance of electromagnetic three-way (6) is connected with (702) between working medium liquid storage, outlet respectively with mend the electric expansion valve (201) of warm system, first capillary (401) of fresh air dehumidifying system, second capillary (501) of heat recovery system be connected.
3. Multi-stage heat according to claim 1 reclaims air energy heat pump dryer, it is characterized in that, is provided with device for drying and filtering between working medium liquid storage between (702) and secondary condenser (105).
4. Multi-stage heat according to claim 1 reclaims air energy heat pump dryer, it is characterized in that, is provided with oil eliminator (102) between compressor (101) and condenser (103).
5. Multi-stage heat according to claim 1 reclaims air energy heat pump dryer, it is characterized in that, is provided with temperature-detecting device (8) in heat preservation and dryness storehouse.
6. Multi-stage heat according to claim 1 reclaims air energy heat pump dryer, it is characterized in that, is provided with deep bead (303) in ventilating duct (301).
7. Multi-stage heat according to claim 6 reclaims air energy heat pump dryer, and it is characterized in that, deep bead (303) is provided with level detecting apparatus, to level detecting apparatus for controlling the opening degree of deep bead (303).
8. Multi-stage heat according to claim 1 reclaims air energy heat pump dryer, and it is characterized in that, main body is provided with artificial PLC controller.
9. Multi-stage heat according to claim 1 reclaims air energy heat pump dryer, it is characterized in that, pipeline and biography temperature pipe (703) are copper pipe.
10. Multi-stage heat according to claim 1 reclaims air energy heat pump dryer, it is characterized in that, evaporimeter (202) below is provided with drip tray.
CN201520929599.7U 2015-11-20 2015-11-20 Multistage heat recovery air -source heat pump drying -machine Withdrawn - After Issue CN205119757U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520929599.7U CN205119757U (en) 2015-11-20 2015-11-20 Multistage heat recovery air -source heat pump drying -machine

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Application Number Priority Date Filing Date Title
CN201520929599.7U CN205119757U (en) 2015-11-20 2015-11-20 Multistage heat recovery air -source heat pump drying -machine

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Publication Number Publication Date
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CN201520929599.7U Withdrawn - After Issue CN205119757U (en) 2015-11-20 2015-11-20 Multistage heat recovery air -source heat pump drying -machine

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105241220A (en) * 2015-11-20 2016-01-13 廖国栋 Multistage heat recovery air energy heat pump drier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105241220A (en) * 2015-11-20 2016-01-13 廖国栋 Multistage heat recovery air energy heat pump drier

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