CN202521937U - Heat pump circulation system and drying system - Google Patents
Heat pump circulation system and drying system Download PDFInfo
- Publication number
- CN202521937U CN202521937U CN2012201038286U CN201220103828U CN202521937U CN 202521937 U CN202521937 U CN 202521937U CN 2012201038286 U CN2012201038286 U CN 2012201038286U CN 201220103828 U CN201220103828 U CN 201220103828U CN 202521937 U CN202521937 U CN 202521937U
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- heat pump
- heat
- heat exchanger
- generator
- absorber
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse 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
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Abstract
The utility model relates to a heat pump circulation system and a drying system. The heat pump circulation system comprises an absorption heat pump circulation subsystem, a compressor and a throttling valve, wherein the absorption heat pump circulation subsystem consists of an absorber, an evaporator, a generator and a condenser; a generating heat exchanger is arranged in the generator; a condensation heat exchanger is arranged in the condenser; and the compressor, the generating heat exchanger, the throttling valve and the condensation heat exchanger are connected in sequence to form a vapor compression heat pump circulation subsystem. The drying system comprises the heat pump circulation system, a drying room, a heater and a waste heat exchanger. According to the heat pump circulation system and the drying system, a cold source is provided for the condenser while a drive heat source is provided for the generator of the absorption heat pump circulation subsystem through the vapor compression heat pump circulation subsystem driven by electric power, therefore, the temperature grade of waste heat or the temperature and the pressure of depleted vapor can be effectively promoted by utilizing electric power.
Description
Technical field
The utility model relates to a kind of heat pump cycle technology of Thermal Power Engineering Field, particularly a kind of novel heat pump circulating system and the drying system of absorption heat pump circulation with the vapor compression heat pump circulation that combined.
Background technology
Absorption heat pump circulating system utilizes absorbent solution can separate out the steam of low boiling component under certain condition, under another condition, can absorb this characteristic of low boiling component steam again consumingly and accomplish refrigeration or heat supply.Two component absorbent solutions are usually adopted in absorption circulation, claim that traditionally low boiling component is a working medium, and high boiling component is an absorbent, and it is right that the two forms working medium, and common have with water to be working medium, to be that the water-lithium bromide working medium of absorbent is right with the lithium bromide.Existing absorption heat pump circulating system mainly comprises: in establish heat exchanger generator, in establish heat exchanger condenser, in establish heat exchanger evaporimeter and in establish the absorber of heat exchanger.Generator links to each other through vapor passageway with condenser, and evaporimeter links to each other through vapor passageway with absorber.Absorbent solution circulates between generator and absorber through the absorbent solution pipeline.
Absorption heat pump comprises to increase first kind absorption heat pump that heat is a purpose and promptly to export second class absorption heat pump that high temperature heat is a purpose to promote the heat temperature; Heat exchanger input external drive thermal source need take place in existing second class absorption heat pump usually; Dropping into cooling water at condensing heat exchanger simultaneously is that low-temperature receiver can move, thereby makes its scope of application receive certain restriction.And on the other hand, vapor compression heat pump can't be exported the high temperature heat more than 85 ℃ usually owing to receive the restriction of refrigeration working medium operating pressure, its application thereby received great restriction.The technology of the utility model organically combines absorption heat pump circulation and vapor compression heat pump circulation; Utilize especially low ebb electricity driving vapor compression heat pump cycle subsystem of low amounts of power; Coming provides required driving heat source and low-temperature receiver simultaneously for the absorption heat pump subsystem; Grade to realize industrial exhaust heat used heat promotes, and makes it to be able to recycle, thereby can bring obvious energy-saving effect and economic benefit to the user.
The utility model content
The purpose of the utility model is to provide a kind of new heat pump circulating system; Technical problem to be solved is through the absorption heat pump subsystem is combined with the vapor compression heat pump subsystem; Realize circulating with the driven by power absorption heat pump in fact, the temperature grade of accomplishing heat promotes.
The purpose of the utility model is also to provide a kind of drying system, and technical problem to be solved is to use low amounts of power to drive heat pump circulating system, and with the waste heat of recovery drying system, and the back of heating up is as drying source.
The purpose of the utility model and solve its technical problem and adopt following technical scheme to realize.A kind of heat pump circulating system according to the utility model proposition; Comprise the absorption heat pump cycle subsystem that constitutes by evaporimeter, absorber, generator and condenser, be provided with evaporating heat exchanger in the evaporimeter, be provided with the absorption heat exchanger in the absorber; Be provided with the generation heat exchanger in the generator; Be provided with condensing heat exchanger in the condenser, be provided with circulating line between absorber and the generator, be used to make absorbent solution between absorber and generator, to circulate; Be provided with the connection pipeline between evaporimeter and the condenser; Be used for the condensed water of condenser is transported to evaporimeter, it also comprises compressor and choke valve, and said compressor, generation heat exchanger, choke valve and condensing heat exchanger are in turn connected to form the vapor compression heat pump cycle subsystem; It is working medium that said absorption heat pump cycle subsystem adopts water, and the absorbent of employing can be LiBr, LiNO
3, LiCl, CaCl
2, LiI or above-mentioned two or more absorbent mixture etc.; Said vapor compression heat pump cycle subsystem adopts ammonia or machine refrigerant is arranged is refrigeration working medium, and this has machine refrigerant can be the mixture etc. of R22, R134a, R410A, R407C, R600, R600a, R123, R124, R142b, R227ea, R236fa or above-mentioned two or more refrigeration working medium.Preferable, the evaporating temperature of said vapor compression heat pump circulation is 0-40 ℃, condensation temperature is 25-70 ℃.Preferable, the evaporating temperature of said absorption heat pump circulation is 30-180 ℃, absorption temperature is 70-240 ℃.
Preferable, aforesaid absorption heat pump cycle subsystem is provided with the first cycle heat exchange device on said circulating line, be used for the absorbent solution from generator output is carried out heat exchange with the absorbent solution of exporting from absorber.
Preferable; Aforesaid absorption heat pump cycle subsystem; Between said connection pipeline and circulating line, also be provided with the second cycle heat exchange device, be used for carrying out heat exchange from the absorbent solution of absorber and condensed water from condenser to what flow out from the first cycle heat exchange device.
Preferable, aforesaid absorption heat pump cycle subsystem, described evaporimeter also is provided with pipeline and the pump on this pipeline is installed, is used for the condensed water of evaporimeter is extracted out from the bottom, and at the evaporimeter top spray.
A kind of drying system according to the utility model proposition; It comprises above-mentioned heat pump circulating system; Also comprise hothouse, heat drying medium or the afterheat heat exchanger that directly heats the heater of the material that is dried and reclaim the wet drying medium or the material waste heat that is dried; This heater links to each other with absorption heat exchanger in the heat pump circulating system and forms the loop, and this afterheat heat exchanger links to each other with evaporating heat exchanger in the heat pump circulating system and forms the loop.Said heater and afterheat heat exchanger can be various forms of heat exchangers such as fin-tube heat exchanger, also can be heating jackets etc.
The utility model compared with prior art has following significantly advantage and beneficial effect:
The heat pump circulating system of the utility model passes through with power-actuated vapor compression heat pump cycle subsystem; To the generator of absorption heat pump subsystem driving heat source is provided by condensation of refrigerant heat release with vapor compression heat pump circulating condensing temperature; To the condenser of absorption heat pump subsystem low-temperature receiver is provided by cold-producing medium evaporation heat absorption simultaneously with vapor compression heat pump circulating and evaporating temperature; Thereby need not existing required external drive thermal source and the low-temperature receiver of second class absorption heat pump, be the range of application of the heat pump circulating system of purpose thereby widened greatly to promote the heat energy grade.On the other hand, because this heat pump circulating system is to be accomplished by the absorption process that is the absorption heat pump circulation of working medium to heat with water, receives the restriction of working medium operating pressure less, thereby can realize exporting the superhigh temperature heat pump of heat energy temperature up to 240 ℃.In addition; Because the generating process of this absorption heat pump circulation can be chosen under the temperature and pressure that is significantly less than its absorption process and carry out; Temperature characterisitic according to the absorbent solution saturated vapour pressure; The occurrence temperature of the absorption heat pump circulation of this moment and condensation temperature poor; That is the difference of the condensation temperature of this required vapor compression heat pump circulation and evaporating temperature is less, thereby the vapor compression heat pump cycle subsystem can obtain higher Energy Efficiency Ratio, and this just means under the situation that the used heat that has surplus heat can be used; This heat pump circulating system can be produced great amount of high-temperature heat energy with a spot of electric power especially low ebb electricity, thereby can realize splendid energy-saving effect and economic benefit.
The novel dried system of the utility model can effectively utilize low amounts of power especially the low ebb electricity improve the quality of drying system waste heat, make it to be able to recycle, thereby bring obvious energy-saving effect and economic benefit to the user.
Above-mentioned explanation only is the general introduction of the utility model technical scheme, in order more to know the technological means of understanding the utility model, and can implement according to the content of specification, below with the preferred embodiment of the utility model and conjunction with figs. specify as after.
Description of drawings
Fig. 1 is the flow chart of the heat pump circulating system of the utility model embodiment 1.
Fig. 2 is the flow chart of the drying system of the utility model embodiment 2.
The specific embodiment
In order further to set forth the utility model is to reach technological means and the effect that predetermined utility model purpose is taked; Below in conjunction with accompanying drawing and preferred embodiment; To its specific embodiment of heat pump circulating system, structure, characteristic and the effect thereof that proposes according to the utility model, specify as after.
Seeing also shown in Figure 1ly, is the flow chart of the heat pump circulating system of the utility model embodiment 1.The heat pump circulating system that present embodiment proposes comprises by absorber 10, evaporimeter 11, generator 20, condenser 21, compressor 27 and choke valve 28.Absorber 10, evaporimeter 11, generator 20 and condenser 21 constitute the absorption heat pump cycle subsystem.Be provided with in the generator 20 heat exchanger 25 takes place, be provided with condensing heat exchanger 26 in the condenser 21.Said compressor 27, heat exchanger 25, choke valve 28 and condensing heat exchanger 26 take place be in turn connected to form the vapor compression heat pump cycle subsystem.
Described absorber 10 is communicated with through first path 12 with evaporimeter 11.In described absorber 10, be provided with absorbent solution.Be provided with in the described absorber and absorb heat exchanger 15; In this absorption heat exchanger 15 heat-carrying agent is arranged; The high temperature that produces in the absorber 10 absorbs heat and adds the heat-carrying agent in the heat absorption heat exchanger, makes this heat-carrying agent obtain heating up, thereby forms the high-quality thermal source that provides to the user.
Be provided with water in the described evaporimeter 11 as working medium.In this evaporimeter 11, also be provided with evaporating heat exchanger 16, external heat source makes water evaporating into refrigerant vapor through this evaporating heat exchanger 16.This refrigerant vapor enters in the absorber 10 through first path 12, thereby the absorbent solution that is absorbed the high concentration in the device 10 absorbs, and discharges the absorption heat of high temperature, and said absorbent solution obtains dilution.Thus, described external heat source is converted into described high temperature heat and provides to the user.
Described generator 20, in be provided with absorbent solution and heat exchanger 25 take place.Condensation takes place in the refrigeration working medium that is compressed the HTHP after machine 27 compresses in heat exchanger 25 takes place; And the condensation heat release as driving heat source is provided to generator 20; Thereby heating absorbent solution wherein makes it produce refrigerant vapor, and the concentration of absorbent solution is improved simultaneously.
Described condenser 21, in be provided with water and condensing heat exchanger 26.Described generator 20 is communicated with through alternate path 22 with condenser 21.The refrigerant vapor that in generator 20, produces enters in the condenser 21 through alternate path 22.Low pressure refrigeration working medium through choke valve 28 evaporates in condensing heat exchanger 26, and to condenser 21 the evaporation heat absorption as low-temperature receiver is provided, and makes the refrigerant vapor from generator 20 be condensed into condensed water.
Described compressor 27 adopts the prior art in the vapor compression heat pump circulatory system of the prior art to realize with choke valve 28.
Be provided with circulating line 31 between described absorber 10 and the generator 20, be used to make absorbent solution between absorber 10 and generator 20, to circulate.The solution that partially absorbs in the absorber 10 is transported in the generator 20, and the solution that partially absorbs in the generator 20 is transported in the absorber 10.Because the absorbent solution in the absorber 10 is to be used to absorb refrigerant vapor, the absorbent solution in the generator is to be used to evaporate refrigerant vapor, so the concentration of the absorbent solution of generator 20 outputs is higher than the concentration of the absorbent solution of absorber 10 outputs.That is to say, carried out the regenerative process of absorbent solution in the absorber by generator 20.For better refrigerant vapor being absorbed, in absorber 10, be provided with sprinkling equipment 13, be used to spray absorbent solution from the high concentration of generator.For better producing refrigerant vapor, in generator 20, be provided with sprinkling equipment 23, be used to spray absorbent solution from the low concentration of absorber.
Be provided with pipeline 32 between described evaporimeter 11 and the condenser 21, be used for the condensed water in the condenser 21 is delivered to evaporimeter 11.Also being provided with pipeline 18 on the evaporimeter 11 and being installed on the pump 17 on the pipeline 18, be used for the water of evaporimeter 11 is extracted out from the bottom, and import from the evaporimeter top.Preferable pipeline 18 is connected with pipeline 32, makes to enter into evaporimeter after mixing from the water of base of evaporator with from the water of condenser.For better producing refrigerant vapor, in evaporimeter 11, be provided with sprinkling equipment 14, be used to spray from condenser with or the water of base of evaporator.Because absorber 10 is different with the operating temperature of generator 20; In order to improve the thermal efficiency; Present embodiment is provided with the first cycle heat exchange device 36 on circulating line; Be used for improving the temperature of the absorbent solution that gets into absorber, reduce the temperature that gets into the absorbent solution in the generator carrying out heat exchange from the absorbent solution of the low temperature of generator output and absorbent solution from the high temperature of absorber output.Because the operating temperature of evaporimeter and condenser is different; For the raising thermal efficiency further; Between pipeline 32 and circulating line 31, also be provided with the second cycle heat exchange device 35; Be used to make from what the first cycle heat exchange device 36 flowed out and carry out heat exchange, improve the temperature of the water that gets into evaporimeter, reduce the temperature of the absorbent solution that gets into generator from the absorbent solution of absorber and condensed water from condenser 21.In addition, delivery pump 34 is set on circulating line 31 also, delivery pump 33 is set on pipeline 32, choke valve 37 is set on the downstream line of the second cycle heat exchange device 35.
The workflow of the heat pump circulating system that the utility model proposes has comprised vapor compression heat pump circulation and absorption heat pump circulation; Be specially: 27 pairs of refrigeration working medium steams from condensing heat exchanger 26 of compressor compress; Condensation takes place in the refrigeration working medium steam that is compressed the HTHP after machine 27 compresses in heat exchanger 25 takes place; And the condensation heat release as driving heat source is provided to generator 20; Thereby heating absorbent solution wherein makes it produce refrigerant vapor, and the concentration of absorbent solution is improved simultaneously.Form the low pressure refrigeration working mediums through choke valve 28 and condensing heat exchanger 26 in, evaporate from the refrigeration working medium that heat exchanger 25 takes place, and provide as the evaporation of low-temperature receiver to condenser 21 and to absorb heat, make refrigerant vapor be condensed into condensed water from generator 20.Condensed water in the condenser 21 is outputed to evaporimeter 11, and condensed water forms refrigerant vapor through the heat that the heat-carrying agent in the evaporating heat exchanger 16 absorbs outside low-temperature heat source in evaporimeter 11, and this refrigerant vapor is transported in the absorber 10.Absorbent solution in the absorber 10 absorbs refrigerant vapor, and discharges the absorption heat of high temperature, and this absorption hotwork is that high temperature heat source is exported to the outside through the heat-carrying agent that absorbs in the heat exchanger 15, and said absorbent solution obtains dilution.Thus, described outside low-temperature heat source is converted into described high temperature heat source and provides to the user.Absorbent solution in absorbent solution in the generator 20 and the absorber 10 circulates, and, carry out heat exchange respectively with from the absorbent solution of absorber output from the absorbent solution of generator output with from the condensed water that condenser is exported.
Seeing also shown in Figure 2ly, is the flow chart of the drying system that proposes of the utility model.The drying system of present embodiment comprises heat pump circulating system, hothouse 50, heater 52 and the afterheat heat exchanger 53 of the foregoing description.The effect of said heater 52 is drying medium or directly the material that is dried is heated.This heater 52 links to each other with absorption heat exchanger 15 in the heat pump circulating system and forms the loop, thereby makes the heat that produces in the absorber 10 be used for drying system.The wet drying medium or the material that is dried of discharging from hothouse 50 have waste heat, and afterheat heat exchanger 53 is arranged on hothouse and discharges on the passage of the wet drying medium or the material that is dried.This afterheat heat exchanger 53 links to each other with evaporating heat exchanger 16, and forms the loop, and the waste heat of material is recovered utilization thereby the wet drying medium that hothouse is discharged perhaps is dried.This waste heat makes the water in the evaporimeter 11 form refrigerant vapor as thermal source.
The workflow of the drying system that the utility model proposes comprises: the heat energy that provides with the absorption heat exchanger 15 in the heat pump circulating system adds hot-air at heater 52; Air after the heating contacts the back with the material that is dried and forms humid air in hothouse 50; Described humid air provides heat energy through afterheat heat exchanger 53 to evaporating heat exchanger.
Above-mentioned drying system utilizes the waste heat of drying system self to produce high temperature heat; And as drying source to drying medium the or directly material that is dried is heated; That is to say; Only make the waste heat of originally being drained obtain effective recycle, thereby can realize obvious energy-saving effect and economic benefit with a spot of electric power especially low ebb electricity.
In the above-described embodiments; Only described the basic procedure of accomplishing the utility model technical scheme, carried out as omiting, for example for other parts of realizing this flow process or equipment; Guarantee pump or valve that each flow of matter direction is required, the working medium of absorbent solution and absorbent.For realizing needed other equipment of the described power circulation system of above-mentioned each embodiment or part, those skilled in the art all can find corresponding technological means in the prior art, repeat no more at this.
The above; It only is the preferred embodiment of the utility model; Not being that the utility model is done any pro forma restriction, though the utility model with the preferred embodiment exposure as above, yet is not in order to limit the utility model; Anyly be familiar with the professional and technical personnel; In not breaking away from the utility model technical scheme scope, make a little change or be modified to the equivalent embodiment of equivalent variations when the technology contents of above-mentioned announcement capable of using, be the content that does not break away from the utility model technical scheme in every case;, all still belong in the scope of the utility model technical scheme any simple modification, equivalent variations and modification that above embodiment did according to the technical spirit of the utility model.
Claims (4)
1. heat pump circulating system; It is characterized in that comprising the absorption heat pump cycle subsystem that constitutes by evaporimeter, absorber, generator and condenser, be provided with evaporating heat exchanger in the evaporimeter, be provided with the absorption heat exchanger in the absorber; Be provided with the generation heat exchanger in the generator; Be provided with condensing heat exchanger in the condenser, be provided with circulating line between absorber and the generator, be used to make absorbent solution between absorber and generator, to circulate; Be provided with the connection pipeline between evaporimeter and the condenser, be used for the condensed water of condenser is transported to evaporimeter;
Also comprise compressor and choke valve; Said compressor, generation heat exchanger, choke valve and condensing heat exchanger are in turn connected to form the vapor compression heat pump cycle subsystem; It is working medium that described absorption heat pump cycle subsystem adopts water, and the vapor compression heat pump cycle subsystem adopts ammonia or machine refrigerant is arranged is refrigeration working medium.
2. heat pump circulating system according to claim 1 is characterized in that, the first cycle heat exchange device is set on said circulating line, is used for the absorbent solution from generator output is carried out heat exchange with the absorbent solution of exporting from absorber.
3. heat pump circulating system according to claim 2; It is characterized in that; Between said connection pipeline and circulating line, also be provided with the second cycle heat exchange device, be used for carrying out heat exchange from the absorbent solution of absorber and condensed water from condenser to what flow out from the first cycle heat exchange device.
4. drying system; It is characterized in that; It comprises each described heat pump circulating system of claim 1-3; Also comprise hothouse, heater and afterheat heat exchanger, said heater links to each other with absorption heat exchanger in the heat pump circulating system and forms the loop, and said afterheat heat exchanger links to each other with evaporating heat exchanger in the heat pump circulating system and forms the loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201038286U CN202521937U (en) | 2012-03-19 | 2012-03-19 | Heat pump circulation system and drying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201038286U CN202521937U (en) | 2012-03-19 | 2012-03-19 | Heat pump circulation system and drying system |
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| Publication Number | Publication Date |
|---|---|
| CN202521937U true CN202521937U (en) | 2012-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012201038286U Expired - Fee Related CN202521937U (en) | 2012-03-19 | 2012-03-19 | Heat pump circulation system and drying system |
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| CN (1) | CN202521937U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110088549A (en) * | 2016-11-18 | 2019-08-02 | 基伊埃工程技术股份有限公司 | Drying system with improved energy efficiency and capability control |
| CN113758053A (en) * | 2021-09-18 | 2021-12-07 | 普泛能源技术研究院(北京)有限公司 | Novel absorber and absorption type refrigerating system thereof |
-
2012
- 2012-03-19 CN CN2012201038286U patent/CN202521937U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110088549A (en) * | 2016-11-18 | 2019-08-02 | 基伊埃工程技术股份有限公司 | Drying system with improved energy efficiency and capability control |
| US11085696B2 (en) | 2016-11-18 | 2021-08-10 | Gea Process Engineering A/S | Drying system with improved energy efficiency and capacity control |
| CN113758053A (en) * | 2021-09-18 | 2021-12-07 | 普泛能源技术研究院(北京)有限公司 | Novel absorber and absorption type refrigerating system thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121107 Termination date: 20160319 |
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| CF01 | Termination of patent right due to non-payment of annual fee |