CN203190488U - Double-compressor air-energy heat-pump heat-supply and heating system - Google Patents
Double-compressor air-energy heat-pump heat-supply and heating system Download PDFInfo
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- CN203190488U CN203190488U CN 201220726528 CN201220726528U CN203190488U CN 203190488 U CN203190488 U CN 203190488U CN 201220726528 CN201220726528 CN 201220726528 CN 201220726528 U CN201220726528 U CN 201220726528U CN 203190488 U CN203190488 U CN 203190488U
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Abstract
The utility model discloses a double-compressor air-energy heat-pump heat-supply and heating system which comprises a unit part, a heat supply part, a heating part and an intelligent control part. The unit part comprises an air-energy heat-pump heating part, an electric heating part, a waterway pipeline part and a control circuit part. The control circuit part is used for controlling the air-energy heat-pump heating part to use different compressor combinations according to the detected inlet water temperature and the detected environment temperature. When the fact that the outlet water temperature reaches a set temperature after compressors are turned on is detected, the electric heating part is controlled not to conduct outputting. When the fact that the outlet water temperature cannot reach the set temperature is detected, the electric heating part is controlled to output required electric heating power according the detected inlet and outlet water temperature difference and flow detected by the waterway pipeline part. When the air-energy heat-pump heating part and the electric heating part conduct outputting in a full power mode and the outlet water temperature still cannot reach the set temperature, the waterway pipeline part is controlled to regulate the water flow through a water flow regulating valve according to the detected temperature so that the outlet water temperature is constant.
Description
Technical field
The utility model relates to double-compressor air energy heat pump heat supply heating field, relates in particular to a kind of plug and play formula double-compressor air energy heat pump heat supply heating system with Based Intelligent Control.
Background technology
Traditional double-compressor air energy heat pump heat supply heating system generally is made up of three parts, and the one, host machine part, the 2nd, water tank part, the 3rd, heating system part; For the domestic type water tank, 1, capacity is generally at 150-320L, water tank is bulky, need occupy construction area greatly during installation, even the water tank that has uses support to be installed on outside the wall, because water tank itself adds the weight of water, this type of mounting means is quite dangerous; 2, the material and the technology that adopt of inner water tank itself, no matter be stainless steel inner container or enamel inner container, because the defective of manufacturing process, radiator leak is difficult to avoid; 3, the heat exchanger of water tank inside generally adopts copper pipe or stainless steel tube, and in the relatively poor area of water quality, heat exchanger tube can be corroded and bore a hole, and causes coolant leakage, in case leak, will be fatefulue for unit; 4, need tube connector to link to each other between main frame and the water tank, the artificial coolant leakage phenomenon that produces when being difficult to avoid installing like this; 5, because the characteristic of storage-type heat pump need water temperature is risen to higher temperature, and required time is longer, can not satisfy instant water requirement, and to the water later stage, fluctuating temperature is bigger the comfortableness that influence is used; In addition, the height of condensation temperature determines the energy consumption of unit, and the unit of tradition band water tank moves under high condensation temperature and high condensing pressure for a long time, to life-span of compressor will be a very big test; 6, adopting the water tank of storage-type, generally all need during water to mix water, several problems, 1 can occur like this) the hot water utilization rate of water tank the inside is not high; 2) water tank is in insulating process, and descending inevitably appears in water temperature, increases energy consumption; When 3) user's house ornamentation is used water valve, must need to install mixed water valve, increase material cost.When 7, general heating system is taked heat in the water tank, all need a heat exchange coil be installed in that water tank is inner, constitute the closed-loop path with floor heating coil pipe or radiator and water circulating pump, increase the difficulty of water tank production technology like this, also occupy water tank capacity; 8, traditional heat supply heating system does not have Based Intelligent Control, can not carry out various remote monitoring to the heat supply heating system, can't satisfy the more hommization demand of modern people: 1) shift to an earlier date such as user's needs or time opening heating, but family nobody the time, then can't realize; 2) user's long period outside, forget and close heating or heat supply water, then can't carry out long-range close heating or heat supply operation; Some fault appears in 3) traditional heat supply heating system, need carry out field assay and get rid of, and particularly the site is weak or from far-off regions after sale, and after-sale service promptness and user satisfaction reduce greatly.
The utility model content
Defective and deficiency at above-mentioned technology existence, a kind of double compressor system plug and play formula constant temperature double-compressor air energy heat pump heat supply heating system with Based Intelligent Control is proposed, integrated design, produce and install more convenient, and provide heating function when can improve the water comfort level, thereby realize the unit function diversity, and realize the network-enabled intelligent Long-distance Control, satisfy the more hommization demand of modern people.
For solving the problems of the technologies described above, the technical scheme that the utility model provides is:
A kind of double-compressor air energy heat pump heat supply heating system is provided, comprises unit part, heat supply part, heating part and intelligent control part; Described unit partly comprises the air energy heat pump heating part, electrical heating part, water route pipeline fitting part and control circuit part; Described control circuit partly is used for using different compressor combination according to detected inflow temperature with environment temperature control air energy heat pump heating part; Described control circuit part also is used for when detecting compressor and open the back leaving water temperature and reach design temperature, and the control electrical heating is not partly exported; Described control circuit part also with when detecting leaving water temperature and can not reach design temperature, according to the detected Inlet and outlet water temperature difference and the detected flow of water route pipeline fitting part, is controlled electrical heating and is partly exported needed electrical heating power; Described control circuit part also be used for when air energy heat pump heating part and electrical heating part all be total power output and leaving water temperature when also not reaching design temperature, according to detected temperature controlled water road pipeline fitting part by Water flow adjusting valve adjusting discharge so that effluent temperature constancy; Described control circuit also is used for when receiving the heating requirement command; temperature according to detected indoor environment temperature or floor heating coil pipe judges whether to carry out the heating instruction; when the temperature of indoor environment temperature or floor heating coil pipe reaches unlatching heating demand temperature, carry out the heating function, when the temperature that detects indoor environment temperature or floor heating coil pipe reaches shutdown temperature, close the heating function.
Wherein, described air energy heat pump heating part comprises first compressor, second compressor, first magnetic valve, second magnetic valve, the 3rd magnetic valve, the 4th magnetic valve, the 5th magnetic valve, the 6th magnetic valve, concentrate plate type heat exchanger, the heating plate type heat exchanger, first filter, second filter, expansion valve, first evaporimeter, second evaporimeter, the first release condenser, the second release condenser, the first release throttle capillary tube, the second release throttle capillary tube, gas-liquid separator, fan blade, motor, the first throttle capillary, the defrosting capillary, after connecting by pipeline with upper-part, form the heat pump heat supply heating system of sealing; Wherein, first compressor that connects successively, second magnetic valve, concentrated plate type heat exchanger, heating plate type heat exchanger, first filter, expansion valve, first evaporimeter, gas-liquid separator, first compressor form first compressor assembly, first heat supply heating path; First compressor of Xiang Lianing, the 6th magnetic valve, heating plate type heat exchanger, first filter, expansion valve, first evaporimeter, gas-liquid separator, first compressor form first compressor assembly, second heat supply heating path successively; First compressor of Xiang Lianing, the 4th magnetic valve, the first release condenser, the first release throttle capillary tube, first evaporimeter, gas-liquid separator, first compressor form the first compressor assembly release path successively; First compressor of Xiang Lianing, first magnetic valve, defrosting capillary, first evaporimeter, gas-liquid separator, first compressor form first compressor assembly defrosting path successively; Second compressor of Xiang Lianing, the 3rd magnetic valve, concentrated plate type heat exchanger, second filter, first throttle capillary, second evaporimeter, second compressor form second compressor assembly heat supply heating path successively; Second compressor of Xiang Lianing, the 5th magnetic valve, the second release condenser, the second release throttle capillary tube, second evaporimeter, second compressor form the second compressor assembly release path successively.
Wherein, described electrical heating partly comprises heating unit assembly, silicon controlled component, first temperature controller, second temperature controller, casing, heating unit assembly water inlet pipe, heating unit assembly outlet pipe, terminal board etc.
Wherein, described water route pipeline fitting partly comprises the water flow switch that links to each other successively, concentrated plate type heat exchanger, electronic mixed water valve, water ga(u)ge, Water flow adjusting valve, and Water flow adjusting valve partly links to each other with described electrical heating.
Wherein, described control circuit comprises master control borad and guidance panel, and described master control borad comprises MCU, temperature sensing circuit and electrical heating power control circuit.
Control described the 4th magnetic valve or the 5th magnetic valve work according to the leaving water temperature that detects when wherein, described control circuit part also is used for overheating problem occurring after selecting correct compressor combination.
Wherein, when also being used for overheating problem occurring after selecting correct compressor combination, described control circuit part by electronic mixed water valve, regulates the turnover ratio of heat pump water outlet and cold water.
Wherein, described intelligent control part comprises described control circuit and control terminal, server, wireless communication module; Described server links to each other with described control terminal and wireless communication module respectively by wireless network, described guidance panel connects master control borad by a RS485/232 communicating circuit, described wireless communication module is that terminal and control terminal carry out communication with the server by wireless network, and described wireless communication module is connected with described master control borad by the 2nd RS485/232 communicating circuit.
Wherein, described wireless communication module and described guidance panel are integrated.
Wherein, described wireless communication module and master control borad are integrated.
The beneficial effects of the utility model are, a kind of double compressor system plug and play formula constant temperature double-compressor air energy heat pump heat supply heating system with Based Intelligent Control is proposed, integrated design, produce and install more convenient, and provide heating function when can improve the water comfort level, thereby realize the unit function diversity, and realize the network-enabled intelligent Long-distance Control, satisfy the more hommization demand of modern people.
Description of drawings
Fig. 1 is the schematic diagram of a kind of double-compressor air energy heat pump heat supply heating system in the utility model first embodiment;
Fig. 2 is that the utility model is the structural representation of the utility model electrical heating part;
Fig. 3 is that the utility model is the schematic diagram of intelligent control part in the embodiment.
The main element symbol description
The 4th magnetic valve 26; The 5th magnetic valve 27; First magnetic valve 12; Electrical heating part 7;
First magnetic valve 12; Second compressor 24; The 3rd magnetic valve 25; The 4th magnetic valve 26;
The 5th magnetic valve 27; The 6th magnetic valve 28; Heating plate type heat exchanger 29;
The first release throttle capillary tube 16; The second release throttle capillary tube 17; Gas-liquid separator 9;
Concentrate plate type heat exchanger 3; Electronic mixed water valve 4; Water ga(u)ge 5; Water flow adjusting valve 6;
Heating unit assembly outlet pipe 71; Heating unit assembly 72; First temperature controller 73; Casing 74;
Showerhead 201; Bathtub 202; Water circulating pump 301; Water flow switch 303;
Floor heating coil pipe or fin 302.
The specific embodiment
By describing technology contents of the present utility model, structural feature in detail, realized purpose and effect, give explanation below in conjunction with embodiment and conjunction with figs. are detailed.
See also Fig. 1, be the schematic diagram of a kind of double-compressor air energy heat pump heat supply heating system in the utility model first embodiment, double-compressor air energy heat pump heat supply heating system comprises unit part, heat supply part, heating part.
Described unit partly comprises the air energy heat pump heating part, electrical heating part 7, water route pipeline fitting part and control circuit part.Described control circuit partly is used for using different compressor combination according to detected inflow temperature with environment temperature control air energy heat pump heating part.Described control circuit part also is used for when detecting compressor and open the back leaving water temperature and reach design temperature, and the control electrical heating is not partly exported; Described control circuit part also with when detecting leaving water temperature and can not reach design temperature, according to the detected Inlet and outlet water temperature difference and the detected flow of water route pipeline fitting part, is controlled electrical heating and is partly exported needed electrical heating power; Described control circuit part also be used for when air energy heat pump heating part and electrical heating part all be total power output and leaving water temperature when also not reaching design temperature, according to detected temperature controlled water road pipeline fitting part by Water flow adjusting valve adjusting discharge so that effluent temperature constancy; Described control circuit also is used for when receiving the heating requirement command; temperature according to detected indoor environment temperature or floor heating coil pipe judges whether to carry out the heating instruction; when the temperature of indoor environment temperature or floor heating coil pipe reaches unlatching heating demand temperature, carry out the heating function, when the temperature that detects indoor environment temperature or floor heating coil pipe reaches shutdown temperature, close the heating function.
Particularly, described air energy heat pump heating part comprises first compressor 1, second compressor 24, second magnetic valve 2, the 3rd magnetic valve 25, the 4th magnetic valve 26, the 5th magnetic valve 27, first magnetic valve 12, concentrate plate type heat exchanger 3, heating plate type heat exchanger 29, first filter 10, second filter 19, expansion valve 11, first evaporimeter 22, second evaporimeter 20, the first release condenser 23, the second release condenser 21, the first release throttle capillary tube 16, the second release throttle capillary tube 17, gas-liquid separator 9, fan blade 15, motor 14, first throttle capillary 18, defrosting capillary 13.
Described first compressor 1, second magnetic valve 2, concentrated plate type heat exchanger 3, heating plate type heat exchanger 29, first filter 10, expansion valve 11, first evaporimeter 22, gas-liquid separator 9, first compressor 1 link to each other successively and constitute first compressor assembly, first heat supply heating path.Described first compressor 1, the 6th magnetic valve 28, heating plate type heat exchanger 29, first filter 10, expansion valve 11, first evaporimeter 22, gas-liquid separator 9, first compressor 1 link to each other successively and constitute first compressor assembly, second heat supply heating path.First compressor 1, the 4th magnetic valve 26, the first release condenser 23, the first release throttle capillary tube 16, first evaporimeter 22, gas-liquid separator 9, first compressor 1 link to each other successively and constitute the first compressor assembly release path.Second compressor 24, the 3rd magnetic valve 25, concentrated plate type heat exchanger 3, second filter 19, first throttle capillary 18, second evaporimeter 20, second compressor 24 link to each other successively and constitute second compressor assembly heat supply heating path.Second compressor 24, the 5th magnetic valve 27, the second release condenser 21, the second release throttle capillary tube 17, second evaporimeter 20, second compressor 24 link to each other successively and constitute the second compressor assembly release path.First compressor 1, first magnetic valve 12, defrosting capillary 13, first evaporimeter 22, gas-liquid separator 9, first compressor 1 link to each other successively and constitute first compressor assembly defrosting path.Above system flow is in service, and motor 14 fan blades 15 will be opened with out of service according to demand.
Described control circuit partly comprises master control borad and guidance panel, and described master control borad comprises MCU, temperature sensing circuit and electrical heating power control circuit.When also being used for overheating problem occurring after selecting correct compressor combination, described control circuit part controls described the 4th magnetic valve or the 5th magnetic valve work according to the leaving water temperature that detects.When also being used for overheating problem occurring after selecting correct compressor combination, described control circuit part by electronic mixed water valve, regulates the turnover ratio of heat pump water outlet and cold water.
Described water route pipeline fitting partly comprises the water flow switch 8 that links to each other successively, concentrated plate type heat exchanger 3, electronic mixed water valve 4, water ga(u)ge 5, Water flow adjusting valve 6, and wherein, Water flow adjusting valve 6 links to each other with described electrical heating part 7.When MCU detected the power of exporting and can satisfy bigger water inlet and require, the stepper motor that partly drives electronic mixed water valve 4 by control circuit mixed water, and the application of big yield is provided.
See also Fig. 2, be the structural representation of the utility model electrical heating part.Electrical heating partly comprises heating unit assembly outlet pipe 71, heating unit assembly 72, first temperature controller 73, casing 74, second temperature controller 75, terminal board 76, silicon controlled component 77, heating unit assembly water inlet pipe 78.Electrical heating part operation principle is: detect coolant-temperature gage and in comparing with design temperature by the leaving water temperature sensor, give MCU with feedback information, judge whether to open the electrical heating part, control heating unit assembly 72 electric after, MCU is, and silicon controlled component 77 is accurately controlled, and required heating power is provided, thereby guarantees that water outlet is constant.
See also Fig. 3, be the schematic diagram of intelligent control part in the utility model one embodiment.Described intelligent control part comprises described control circuit and control terminal, server, wireless communication module, described server links to each other with described control terminal and wireless communication module respectively by wireless network, described guidance panel connects master control borad by a RS485/232 communicating circuit, described wireless communication module is that terminal and control terminal carry out communication with the server by wireless network, and described wireless communication module is connected with described master control borad by the 2nd RS485/232 communicating circuit.Wherein, in the present embodiment, described wireless communication module and described guidance panel are integrated, and in another embodiment, described wireless communication module and master control borad are integrated.
Described heating part branch comprises showerhead 201, bathtub 202, and its configuration is decided according to actual finishing and the installation situation of user family, can satisfy a plurality of water requirements with water spot simultaneously with water end (W.E.).Described heating part comprises water circulating pump 301, water flow switch 303, floor heating coil pipe or fin 302.Can be according to the demand of user to heating, the use of warming plate pipe and fin contentedly simultaneously.
The advantage of employing such scheme is: 1, adopt the water tank free design, save installing space, easy for installation and use safety; 2, stop the phenomenon that water tank leaks; 3, avoid the perforation that is corroded of coil pipe in the water tank, cause the situation that unit is scrapped; 4, owing to reduced the link of using tube connector, greatly reduced the probability of coolant leakage; 5, the designed unit of this programme can be accomplished plug and play, saves the time of waiting for water, guarantees constant-temperature effluent, improves the comfortableness of water, and can guarantee the continuation of water; Unit is under this water situation, and efficiency is higher, and is more energy-conservation, and be conducive to source pump and safely and steadily run, thus the service life of guarantee unit; 6, owing to adopt no water tank design, the low problem of hot water utilization rate can not occur, more can not occur causing the problem of energy waste because heat insulation effect is not good, can reduce the use cost of user's valve class in addition; 7, use the release condenser by design, when avoiding leaving water temperature too high, can reduce the operating load of unit, thereby greatly reduce the unit energy consumption, meet the requirement of national energy-saving and emission-reduction; 8, according to dump power, judging that increasing the water yield can also guarantee under the constant situation of water outlet, by electronic mixed water valve, carry out bypass and mix water, can make total water flow bigger like this, water will be more comfortable; 9, can select corresponding compressor according to the size of water load, can take full advantage of heat pump, when guaranteeing that water is comfortable, improve the heat pump efficiency, reduce the electricity consumption power consumption; 10, under the prerequisite that satisfies the hot-water supply requirement, can select heating mode by guidance panel, realize room heating demand; 11, this heat supply heating system adopts double compressor system, can select corresponding compressor according to the size of water load, in conjunction with the instant heating system, guarantees that water outlet is constant; 12, adopt remote control function, the user can use control terminal, as mobile phone or other equipment that can network, the heat supply heating system is carried out intellectuality control, thus the human oriented design of the system of embodiment.
The above only is embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (8)
1. a double-compressor air energy heat pump heat supply heating system is characterized in that, comprises unit part, heat supply part, heating part and intelligent control part;
Described unit partly comprises the air energy heat pump heating part, electrical heating part, water route pipeline fitting part and control circuit part; Described control circuit comprises master control borad and guidance panel, and described master control borad comprises MCU, temperature sensing circuit and electrical heating power control circuit;
Described intelligent control part comprises described control circuit and control terminal, server, wireless communication module; Described server links to each other with described control terminal and wireless communication module respectively by wireless network, described guidance panel connects master control borad by a RS485/232 communicating circuit, described wireless communication module is that terminal and control terminal carry out communication with the server by wireless network, and described wireless communication module is connected with described master control borad by the 2nd RS485/232 communicating circuit.
2. a kind of double-compressor air energy heat pump heat supply heating system according to claim 1, it is characterized in that, described air energy heat pump heating part comprises first compressor, second compressor, first magnetic valve, second magnetic valve, the 3rd magnetic valve, the 4th magnetic valve, the 5th magnetic valve, the 6th magnetic valve, concentrate plate type heat exchanger, the heating plate type heat exchanger, first filter, second filter, expansion valve, first evaporimeter, second evaporimeter, the first release condenser, the second release condenser, the first release throttle capillary tube, the second release throttle capillary tube, gas-liquid separator, fan blade, motor, the first throttle capillary, the defrosting capillary, after connecting by pipeline with upper-part, form the heat pump heat supply heating system of sealing; Wherein,
First compressor of Lian Jieing, second magnetic valve, concentrated plate type heat exchanger, heating plate type heat exchanger, first filter, expansion valve, first evaporimeter, gas-liquid separator, first compressor form first compressor assembly, first heat supply heating path successively;
First compressor of Xiang Lianing, the 6th magnetic valve, heating plate type heat exchanger, first filter, expansion valve, first evaporimeter, gas-liquid separator, first compressor form first compressor assembly, second heat supply heating path successively;
First compressor of Xiang Lianing, the 4th magnetic valve, the first release condenser, the first release throttle capillary tube, first evaporimeter, gas-liquid separator, first compressor form the first compressor assembly release path successively;
First compressor of Xiang Lianing, first magnetic valve, defrosting capillary, first evaporimeter, gas-liquid separator, first compressor form first compressor assembly defrosting path successively;
Second compressor of Xiang Lianing, the 3rd magnetic valve, concentrated plate type heat exchanger, second filter, first throttle capillary, second evaporimeter, second compressor form second compressor assembly heat supply heating path successively;
Second compressor of Xiang Lianing, the 5th magnetic valve, the second release condenser, the second release throttle capillary tube, second evaporimeter, second compressor form the second compressor assembly release path successively.
3. a kind of double-compressor air energy heat pump heat supply heating system according to claim 1, it is characterized in that described electrical heating partly comprises heating unit assembly, silicon controlled component, first temperature controller, second temperature controller, casing, heating unit assembly water inlet pipe, heating unit assembly outlet pipe, terminal board etc.
4. a kind of double-compressor air energy heat pump heat supply heating system according to claim 1, it is characterized in that, described water route pipeline fitting partly comprises the water flow switch that links to each other successively, concentrated plate type heat exchanger, electronic mixed water valve, water ga(u)ge, Water flow adjusting valve, wherein, Water flow adjusting valve partly links to each other with described electrical heating.
5. a kind of double-compressor air energy heat pump heat supply heating system according to claim 2, it is characterized in that, control described the 4th magnetic valve or the 5th magnetic valve work according to the leaving water temperature that detects when described control circuit part also is used for overheating problem occurring after selecting correct compressor combination.
6. a kind of double-compressor air energy heat pump heat supply heating system according to claim 4, it is characterized in that, when also being used for overheating problem occurring after selecting correct compressor combination, described control circuit part by electronic mixed water valve, regulates the turnover ratio of heat pump water outlet and cold water.
7. a kind of double-compressor air energy heat pump heat supply heating system according to claim 1 is characterized in that described wireless communication module and described guidance panel are integrated.
8. a kind of double-compressor air energy heat pump heat supply heating system according to claim 1 is characterized in that described wireless communication module and master control borad are integrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220726528 CN203190488U (en) | 2012-12-25 | 2012-12-25 | Double-compressor air-energy heat-pump heat-supply and heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220726528 CN203190488U (en) | 2012-12-25 | 2012-12-25 | Double-compressor air-energy heat-pump heat-supply and heating system |
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| Publication Number | Publication Date |
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| CN203190488U true CN203190488U (en) | 2013-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220726528 Expired - Fee Related CN203190488U (en) | 2012-12-25 | 2012-12-25 | Double-compressor air-energy heat-pump heat-supply and heating system |
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| CN (1) | CN203190488U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014101463A1 (en) * | 2012-12-25 | 2014-07-03 | Chen Jianliang | Dual compressor air heat pump heat supply and heating supply system |
-
2012
- 2012-12-25 CN CN 201220726528 patent/CN203190488U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014101463A1 (en) * | 2012-12-25 | 2014-07-03 | Chen Jianliang | Dual compressor air heat pump heat supply and heating supply system |
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Legal Events
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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: 20130911 Termination date: 20161225 |
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| CF01 | Termination of patent right due to non-payment of annual fee |