CN102117857A - Photovoltaic and photo-thermal integrated flat plate solar module - Google Patents

Photovoltaic and photo-thermal integrated flat plate solar module Download PDF

Info

Publication number
CN102117857A
CN102117857A CN2010106223397A CN201010622339A CN102117857A CN 102117857 A CN102117857 A CN 102117857A CN 2010106223397 A CN2010106223397 A CN 2010106223397A CN 201010622339 A CN201010622339 A CN 201010622339A CN 102117857 A CN102117857 A CN 102117857A
Authority
CN
China
Prior art keywords
photovoltaic
photo
transparent cover
thermal
cover plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN2010106223397A
Other languages
Chinese (zh)
Other versions
CN102117857B (en
Inventor
尉才良
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZHEJIANG MEIDIYA NEW ENERGY TECHNOLOGY Co Ltd
Original Assignee
ZHEJIANG MEIDIYA NEW ENERGY TECHNOLOGY Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZHEJIANG MEIDIYA NEW ENERGY TECHNOLOGY Co Ltd filed Critical ZHEJIANG MEIDIYA NEW ENERGY TECHNOLOGY Co Ltd
Priority to CN2010106223397A priority Critical patent/CN102117857B/en
Publication of CN102117857A publication Critical patent/CN102117857A/en
Application granted granted Critical
Publication of CN102117857B publication Critical patent/CN102117857B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy, e.g. solar towers
    • 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
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy

Abstract

The invention discloses a photovoltaic and photo-thermal integrated flat plate solar module and belongs to the technical field of solar photovoltaic and photo-thermal utilization. The photovoltaic and photo-thermal integrated flat plate solar module comprises a heat-absorbing plate core mounted in a heat insulating layer, wherein an upper-layer transparent cover plate and a lower-layer transparent cover plate are mounted above the heat-absorbing plate core; and a photovoltaic cell module is mounted between the upper-layer transparent cover plate and the lower-layer transparent cover plate. According to the scheme, the solar photovoltaic cell is integrated inside a flat plate solar heat collector and the flat plate solar assembly capable of generating power and producing heat is provided.

Description

The two-in-one panel solar assembly of photovoltaic and photo-thermal
Technical field
Open photovoltaic of the present invention and the two-in-one panel solar assembly of photo-thermal belong to photovoltaic and solar thermal utilization technical field.
Background technology
Common solar cell assembly is made up of transparent cover plate, colloid encapsulant, photovoltaic cell, back layer and external frame etc.In most of assemblies, transparent cover plate is low iron toughened glass, and the colloid encapsulant is EVA (a vinyl acetic acid second fat), plays bonding transparent cover plate and back layer and sealing, and back layer is Tedlar, seals.Photovoltaic cell generally adopts monocrystalline silicon or polysilicon.In laminated laying technology, be followed successively by from top to bottom: glass, EVA, battery, EVA, Tedlar.Its electricity generating principle is that sunlight sees through transparent cover plate and EVA shines on the photovoltaic cell, and after photovoltaic cell absorbed the solar energy that sees through, sub-fraction is transformed into electric energy generated electricity, and most will scatter and disappear with the form of heat energy in addition.
The ordinary flat solar collector mainly is made up of parts such as transparent cover plate, heat-absorbing plate core, insulating, sealing ring, backboard and housings.Wherein transparent cover plate is identical with the transparent cover plate material that solar photovoltaic assembly is adopted, and all is the low iron toughened glass of high printing opacity.Its thermal-arrest principle is that solar energy sees through transparent cover plate and shines on the heat-absorbing plate core, and heat-absorbing plate core becomes heat energy to carry out thermal-arrest transform light energy after absorbing the sunlight that sees through.
At present, if the user need utilize solar energy to generate electricity simultaneously and produce hot water, then two cover systems must be installed: solar photovoltaic generation system and solar water heating system.The cost that two cover systems need is higher, differs under the limited situation of erection space and satisfies user's demand surely.
Summary of the invention
The invention provides a kind of photovoltaic and two-in-one panel solar assembly of photo-thermal that can generate electricity and can heat production.
To achieve these goals, the technical solution adopted in the present invention is:
The two-in-one panel solar assembly of photovoltaic and photo-thermal comprises the heat-absorbing plate core that is installed in the insulating, and the top of described heat-absorbing plate core is equipped with two-layer transparent cover plate up and down, between the two-layer transparent cover plate photovoltaic cell component is being installed up and down.
As the further setting of such scheme, described photovoltaic cell component comprises by several rule arrangements and has monocrystalline silicon or the polysilicon photovoltaic cell that the certain interval serial or parallel connection welds between any two.
Described transparent cover plate adopts high printing opacity to hang down iron toughened glass.
The lateral wall of described insulating is provided with frame, and the bottom of insulating is provided with backboard.
Be installed in the upper surface of frame behind the edge coating sealing ring of described two-layer transparent cover plate up and down, the upper surface of sealing ring compresses by press strip again.
The two-in-one panel solar assembly of photovoltaic of the present invention and photo-thermal mainly comprises building blocks such as transparent cover plate, photovoltaic cell, heat-absorbing plate core, insulating, frame, backboard, press strip, sealing ring and terminal box.
Wherein each modular construction and annexation are: heat-absorbing plate core adopts fine copper or the compound form of copper aluminium, welds together by the copper pipe frame with it and the copper coin or the aluminium sheet that scribble heat absorbing coating formed, and the copper pipe frame passes insulating and frame is fixed; Frame adopts aluminum alloy materials, and backboard adopts galvanized sheet, and zinc-plated backboard is by the tight interlock of lower bottom part tooth of frame, and fluid sealant is squeezed in inboard, interlock position, carries out the bottom sealing; Insulating bottom and side are the polyurethane integral foamed heat insulating or separately are incubated with heat-preservation cotton and insulation bar that the heat-insulation layer side is held in the inboard of frame, and the bottom surface is attached on the zinc-plated backboard; Transparent cover plate adopts high printing opacity to hang down iron toughened glass, one has two, in the middle of two transparent cover plates, place several rules arrangements and have monocrystalline silicon or the polysilicon photovoltaic cell that the certain interval serial or parallel connection welds between any two, the size of this gap has determined the solar light irradiation that the sees through area size at heat-absorbing plate core, thereby has determined the proportion of utilization of photovoltaic and photo-thermal; Two-layer transparent cover plate adopts EVA or other binding agents bonding to fix with middle sandwich photovoltaic cell; After coating with sealing ring, transparent cover plate is installed in the upper surface of frame all around; Press strip is an aluminum alloy materials, and the upper end is pressed on the sealing ring, and frame links closely in the lower end; A terminal box is installed in inboard a part at frame, and the lead-in wire of photovoltaic cell is fixed in this terminal box.
The beneficial effect of the two-in-one panel solar assembly of photovoltaic of the present invention and photo-thermal is:
1. photovoltaic cell has the certain clearance arrangement between any two, can accelerate the photovoltaic cell heat radiation, reduce the photovoltaic cell ambient temperature, thereby improve the efficient of photovoltaic cell;
2. adopt the technology of the middle sandwich photovoltaic cell of two blocks of glass, directly the core component (photovoltaic cell) with the regular solar photovoltaic module is integrated into flat-plate solar collector inside, makes flat-plate solar collector have photovoltaic and the two-in-one function of photo-thermal;
3. because therefore photovoltaic module and the two-in-one design of photo-thermal assembly have reduced the raw-material common ground that needs when designing separately separately,, reduced production cost, the erection space when also having reduced actual the use simultaneously such as frame, backboard and sealing ring etc.
The invention will be further described below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is the structural representation of preferred embodiment of the present invention;
Fig. 2 is the A-A generalized section of Fig. 1.
Embodiment
As shown in Figure 1 and Figure 2, the two-in-one panel solar assembly of photovoltaic of the present invention and photo-thermal mainly comprises building blocks such as transparent cover plate 1, photovoltaic cell 2, heat-absorbing plate core 3, insulating 4, frame 5, backboard 6, press strip 7, sealing ring 8 and terminal box 9.Wherein material that each parts adopted and annexation are: heat-absorbing plate core 3 is formed by laser welding by the aluminium sheet 32 of copper pipe frame 31 and surperficial blue titanium coating, and copper pipe frame 31 passes insulating 4 and frame 5 is fixed; Frame 5 adopts aluminum alloy materials, and backboard 6 adopts galvanized sheet, and zinc-plated backboard 6 is by the tight interlock of lower bottom part tooth of frame 5, and fluid sealant is squeezed in inboard, interlock position, carries out the bottom sealing; Insulating 4 adopts polyurethane heat insulation material, and bottom and side are the polyurethane integral foamed heat insulating, and the heat-insulation layer side is held in the inboard of frame, and the bottom surface is attached on the zinc-plated backboard 6; Transparent cover plate 1 adopts the low iron toughened glass of high printing opacity, and one has two, places several rules arrangements and have monocrystalline silicon or the polysilicon photovoltaic cell 2 that the certain interval serial or parallel connection welds between any two in the middle of two transparent cover plates 1; Two-layer transparent cover plate 1 adopts EVA or other binding agents bonding to fix with middle sandwich photovoltaic cell 2; After coating with sealing ring 8, transparent cover plate 1 is installed in the upper surface of frame 5 all around; Press strip 7 is an aluminum alloy materials, and the upper end is pressed on the sealing ring 8, and frame 5 links closely in the lower end; A terminal box 9 is installed in inboard a part at frame 5, and the lead-in wire of photovoltaic cell 2 is fixed in this terminal box 9.
The foregoing description only is used to the inventive concept of the present invention of explaining, but not to the qualification of rights protection of the present invention, allly utilizes this design that the present invention is carried out the change of unsubstantiality, all should fall into protection scope of the present invention.

Claims (5)

1. the two-in-one panel solar assembly of photovoltaic and photo-thermal, comprise the heat-absorbing plate core that is installed in the insulating, it is characterized in that: the top of described heat-absorbing plate core is equipped with two-layer transparent cover plate up and down, between the two-layer transparent cover plate photovoltaic cell component is being installed up and down.
2. the two-in-one panel solar assembly of photovoltaic as claimed in claim 1 and photo-thermal is characterized in that: described photovoltaic cell component comprises by several rule arrangements and has monocrystalline silicon or the polysilicon photovoltaic cell that the certain interval serial or parallel connection welds between any two.
3. the two-in-one panel solar assembly of photovoltaic as claimed in claim 1 and photo-thermal is characterized in that: described transparent cover plate adopts high printing opacity to hang down iron toughened glass.
4. the two-in-one panel solar assembly of photovoltaic as claimed in claim 1 and photo-thermal, it is characterized in that: the lateral wall of described insulating is provided with frame, and the bottom of insulating is provided with backboard.
5. the two-in-one panel solar assembly of photovoltaic as claimed in claim 4 and photo-thermal is characterized in that: be installed in the upper surface of frame behind the edge coating sealing ring of described two-layer transparent cover plate up and down, the upper surface of sealing ring compresses by press strip again.
CN2010106223397A 2010-12-31 2010-12-31 Photovoltaic and photo-thermal integrated flat plate solar module Expired - Fee Related CN102117857B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010106223397A CN102117857B (en) 2010-12-31 2010-12-31 Photovoltaic and photo-thermal integrated flat plate solar module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010106223397A CN102117857B (en) 2010-12-31 2010-12-31 Photovoltaic and photo-thermal integrated flat plate solar module

Publications (2)

Publication Number Publication Date
CN102117857A true CN102117857A (en) 2011-07-06
CN102117857B CN102117857B (en) 2013-10-09

Family

ID=44216525

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010106223397A Expired - Fee Related CN102117857B (en) 2010-12-31 2010-12-31 Photovoltaic and photo-thermal integrated flat plate solar module

Country Status (1)

Country Link
CN (1) CN102117857B (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103353181A (en) * 2013-07-29 2013-10-16 东南大学 Phase-changing heat storage type photovoltaic and optothermal heat collector and preparation method thereof
CN103594538A (en) * 2013-11-20 2014-02-19 南通星昀能源科技有限公司 Solar photoelectric photo-thermal integrated assembly and solar combined heat and power generation system thereof
CN103673327A (en) * 2012-09-07 2014-03-26 安徽人人家太阳能有限公司 Multipurpose flat-plate-type solar device manufacturing method and corresponding multipurpose flat-plate-type solar device
CN104048421A (en) * 2014-06-14 2014-09-17 马根昌 Solar power generation and water supply integrated system
CN104075461A (en) * 2014-06-26 2014-10-01 南宁红菱能源科技有限公司 Photovoltaic and photothermic integration solar thermal collector
CN104682840A (en) * 2014-12-02 2015-06-03 友达光电股份有限公司 Photovoltaic module, and photovoltaic plate and clamping piece thereof
CN105227134A (en) * 2015-11-07 2016-01-06 安徽泰德光伏股份有限公司 Photovoltaic and photothermal integral assembly
CN105356826A (en) * 2015-11-07 2016-02-24 安徽泰德光伏股份有限公司 Photovoltaic-thermal integrated plate assembly
CN106788235A (en) * 2016-12-02 2017-05-31 西安建筑科技大学 A kind of Mobile portable formula solar energy electric heater unit
CN107070398A (en) * 2017-05-31 2017-08-18 安徽沃兰朵电源技术有限公司 One kind is based on current heat absorption circulating solar energy cell panel
CN107328119A (en) * 2016-05-01 2017-11-07 黄建武 Photovoltaic and photothermal integral device
CN108775310A (en) * 2018-07-25 2018-11-09 德州金亨新能源有限公司 A kind of plate core for flat-plate solar collector clip spring structure
CN109631354A (en) * 2018-12-13 2019-04-16 广东五星太阳能股份有限公司 External cadmium telluride thin-film battery photovoltaic and photothermal solar flat plate collector
CN111006400A (en) * 2019-12-18 2020-04-14 吴祥初 Solar photovoltaic photo-thermal collector
CN112815541A (en) * 2020-12-31 2021-05-18 广西赫阳能源科技有限公司 Photovoltaic heat collector

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104748407A (en) * 2015-03-04 2015-07-01 大连理工大学 Solar energy thermoelectricity co-generation and co-supply system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3923821A1 (en) * 1989-07-19 1991-01-24 Otto Dipl Phys Spormann Solar collector combined with photovoltaic collector - has UV and visible radiation passed through IR absorbing thermic collector onto photovoltaic collector
CN1707815A (en) * 2004-06-11 2005-12-14 潘戈 Temperature regulating planar mixed photovoltaic heat collector
CN101060146A (en) * 2007-05-11 2007-10-24 华南理工大学 A package method for double-side silicon-glass solar cell assembly
CN101089325A (en) * 2006-03-06 2007-12-19 金凌 Hollow thermal insulation photovoltaic energy-saving building component
CN101476373A (en) * 2009-01-16 2009-07-08 李仁星 Multifunctional energy-saving roof plate

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3923821A1 (en) * 1989-07-19 1991-01-24 Otto Dipl Phys Spormann Solar collector combined with photovoltaic collector - has UV and visible radiation passed through IR absorbing thermic collector onto photovoltaic collector
CN1707815A (en) * 2004-06-11 2005-12-14 潘戈 Temperature regulating planar mixed photovoltaic heat collector
CN101089325A (en) * 2006-03-06 2007-12-19 金凌 Hollow thermal insulation photovoltaic energy-saving building component
CN101060146A (en) * 2007-05-11 2007-10-24 华南理工大学 A package method for double-side silicon-glass solar cell assembly
CN101476373A (en) * 2009-01-16 2009-07-08 李仁星 Multifunctional energy-saving roof plate

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103673327B (en) * 2012-09-07 2016-06-29 泰安市晨阳太阳能有限公司 Multipurpose plate type solar device manufacture method and goods thereof
CN105423569A (en) * 2012-09-07 2016-03-23 张启果 Manufacturing method for multipurpose flat type solar device and product thereof
CN103673327A (en) * 2012-09-07 2014-03-26 安徽人人家太阳能有限公司 Multipurpose flat-plate-type solar device manufacturing method and corresponding multipurpose flat-plate-type solar device
CN105402902A (en) * 2012-09-07 2016-03-16 张启果 Manufacturing method for multipurpose flat-plate-type solar device and product thereof
CN105423569B (en) * 2012-09-07 2017-06-27 何泽波 Multipurpose plate type solar device preparation method and its product
CN105402902B (en) * 2012-09-07 2017-09-08 广东桑辉能源有限公司 Multipurpose plate type solar device preparation method and its product
CN103353181A (en) * 2013-07-29 2013-10-16 东南大学 Phase-changing heat storage type photovoltaic and optothermal heat collector and preparation method thereof
CN103353181B (en) * 2013-07-29 2016-05-04 东南大学 A kind of phase-change heat-storage photovoltaic and photothermal heat collector and preparation method thereof
CN103594538B (en) * 2013-11-20 2015-11-25 南通星昀能源科技有限公司 Solar photoelectric and light-heat integration assembly and solar cogeneration system thereof
WO2015074407A1 (en) * 2013-11-20 2015-05-28 南通星昀能源科技有限公司 Solar integrated photoelectric photo-thermal component and solar cogeneration system thereof
CN103594538A (en) * 2013-11-20 2014-02-19 南通星昀能源科技有限公司 Solar photoelectric photo-thermal integrated assembly and solar combined heat and power generation system thereof
CN104048421A (en) * 2014-06-14 2014-09-17 马根昌 Solar power generation and water supply integrated system
CN104075461A (en) * 2014-06-26 2014-10-01 南宁红菱能源科技有限公司 Photovoltaic and photothermic integration solar thermal collector
CN104682840A (en) * 2014-12-02 2015-06-03 友达光电股份有限公司 Photovoltaic module, and photovoltaic plate and clamping piece thereof
CN105356826A (en) * 2015-11-07 2016-02-24 安徽泰德光伏股份有限公司 Photovoltaic-thermal integrated plate assembly
CN105227134A (en) * 2015-11-07 2016-01-06 安徽泰德光伏股份有限公司 Photovoltaic and photothermal integral assembly
CN107328119A (en) * 2016-05-01 2017-11-07 黄建武 Photovoltaic and photothermal integral device
CN106788235A (en) * 2016-12-02 2017-05-31 西安建筑科技大学 A kind of Mobile portable formula solar energy electric heater unit
CN106788235B (en) * 2016-12-02 2018-04-17 西安建筑科技大学 A kind of Mobile portable formula solar energy electric heater unit
CN107070398A (en) * 2017-05-31 2017-08-18 安徽沃兰朵电源技术有限公司 One kind is based on current heat absorption circulating solar energy cell panel
CN107070398B (en) * 2017-05-31 2019-08-09 刘海明 One kind is based on water flow heat absorption circulating solar energy solar panel
CN108775310A (en) * 2018-07-25 2018-11-09 德州金亨新能源有限公司 A kind of plate core for flat-plate solar collector clip spring structure
CN109631354A (en) * 2018-12-13 2019-04-16 广东五星太阳能股份有限公司 External cadmium telluride thin-film battery photovoltaic and photothermal solar flat plate collector
CN111006400A (en) * 2019-12-18 2020-04-14 吴祥初 Solar photovoltaic photo-thermal collector
CN111006400B (en) * 2019-12-18 2021-03-23 吴祥初 Solar photovoltaic photo-thermal collector
CN112815541A (en) * 2020-12-31 2021-05-18 广西赫阳能源科技有限公司 Photovoltaic heat collector

Also Published As

Publication number Publication date
CN102117857B (en) 2013-10-09

Similar Documents

Publication Publication Date Title
CN102117857B (en) Photovoltaic and photo-thermal integrated flat plate solar module
CN102183099B (en) Photovoltaic and photothermal complementary flat plate solar component
CN102646742B (en) Plate heat tube type solar photovoltaic-photothermal composite heat collector and production process thereof
CN105553408B (en) A kind of absorber plate photovoltaic and photothermal solar integrated module compound directly with glass cover-plate
CN104064616B (en) Solar photovoltaic module
CN201918411U (en) Flat-plate photovoltaic and photo-thermal complementary solar component
CN202562085U (en) Flat hollow solar thermoelectric integrated device
CN102117859B (en) Flat plate solar photovoltaic heat collector adopting amorphous silicon glass film battery
WO2009127115A1 (en) A louvre-type solar cell glass assembly for a glass curtain wall
CN204029828U (en) A kind of generating electricity on two sides solar cell hollow assembly
CN201927628U (en) Flat-plate solar photovoltaic heat collector of amorphous silicon glass film battery
CN203289126U (en) Photovoltaic photo-thermal energy system
CN201449047U (en) Photovoltaic hot-water compound concentrator
CN102664212A (en) Serpentine channel solar cell waste-heat recovery unit
CN201946617U (en) Photovoltaic and photo-thermal integrated flat plate solar module
CN105423569B (en) Multipurpose plate type solar device preparation method and its product
CN203839391U (en) Solar photovoltaic and photo-thermal composite assembly
CN107070398B (en) One kind is based on water flow heat absorption circulating solar energy solar panel
CN202871837U (en) Photovoltaic-thermal collecting assembly
CN101826819B (en) Solar energy-utilizing device capable of synchronously generating and outputting electric energy and thermal energy
CN210349852U (en) Photovoltaic and photothermal integrated assembly
CN102013444B (en) Solar electric heating coupled air-cooling system
CN203242650U (en) Bifacial solar cell module
CN201699614U (en) Solar energy utilizing device for synchronously generating and outputting electric energy and heat energy
CN203116318U (en) Balcony type microporous and superconductive flat-plate solar collector

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
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: 20131009

Termination date: 20161231

CF01 Termination of patent right due to non-payment of annual fee