CN102003835A - Scanning defrost type air-source gas heat pump - Google Patents
Scanning defrost type air-source gas heat pump Download PDFInfo
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- CN102003835A CN102003835A CN2010105931478A CN201010593147A CN102003835A CN 102003835 A CN102003835 A CN 102003835A CN 2010105931478 A CN2010105931478 A CN 2010105931478A CN 201010593147 A CN201010593147 A CN 201010593147A CN 102003835 A CN102003835 A CN 102003835A
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Abstract
The invention provides a scanning defrost type air-source gas heat pump, which comprises a gas engine, a Freon compressor, a four-way valve, an indoor heat exchanger, a throttling valve and an outdoor heat exchanger, and is characterized by also comprising a smoke three-way valve and a smoke scanning defrost device, wherein the smoke scanning defrost device is a small-area device which can circularly move along a windward side of the outdoor heat exchanger and jet smoke to a frosted heat transfer surface of the outdoor heat exchanger; the input end of the smoke three-way valve is connected with a smoke exhaust opening of the gas engine; and one output end of the smoke three-way valve is connected with the gas inlet end of the smoke scanning defrost device through a smoke pipe. High-temperature smoke exhausted from the gas engine performs scanning quick defrosting on the outdoor heat exchanger partially and circularly, so that the air-source gas heat pump can defrost and work normally without stopping at a low temperature or an ultralow temperature in the absence of defrosting energy loss. Therefore, the scanning defrost type air-source gas heat pump is an upgraded product of the conventional air-source gas heat pump.
Description
Technical field
The present invention relates to a kind of natural gas engine driven air source gas-fired heat pump that utilizes, particularly enter out of doors under the ultralow temperature-12 degree condition, still can shut down the air source gas-fired heat pump that can defrost, belong to air-conditioning technical and energy-saving field.
Background technology
Existing air source gas-fired heat pump, mainly by gas engine, freon compressore, cross valve, indoor heat exchanger, choke valve and outdoor heat exchanger are formed, gas engine uses natural gas to be the energy, drive freon compressore work and (also can drive generator work earlier, drive freon compressore work with the generator electricity again), the exhaust opening of gas engine is discharged outdoor through blast pipe, when cross valve is in the indoor heating position, the output of freon compressore is through cross valve, indoor heat exchanger, choke valve is connected with outdoor heat exchanger, the other end of outdoor heat exchanger is connected with the input of freon compressore, the indoor heat exchanger of this moment plays the condenser effect, the Freon liquid of condensation is through the flow controller step-down, freon after the throttling evaporates in outdoor heat exchanger and absorbs heat from atmosphere, the low pressure freon steam that is produced is sucked by the input of compressor through the guiding of cross valve, finish circulation, can be the airborne heat pump of outdoor lower temperature to indoor needs with assurance heating.Be in cross valve to indoor refrigeration position summer, makes outdoor heat exchanger as condenser, and indoor heat exchanger becomes evaporimeter, can indoor heat pump in the outdoor atmosphere to guarantee the needs of room temperature lowering.Because of its capacity usage ratio height, be a kind of energy saving and environment friendly changes in temperature feeding mechanism.
This device does not have any problem when working summer, and problem is in the winter time, particularly outdoor temperature drops to 5oC when following, absorb heat from atmosphere because guarantee, so this moment outdoor heat exchanger the heat-transfer area temperature must drop to 0oC or even lower, when air flows through the heat-transfer area that is lower than 0oC, airborne moisture content just will frosting on heating surface, this frost layer not only makes heat output reduce, and because the gap of air side passage is all very narrow, has only 1.5-2.5mm, the frosting layer will seriously stop up air duct, thereby evaporating pressure is further descended, and not only heating load descends greatly, and is forced to automatic left alone without help machine at last.The mode that is adopted for this problem of solution mainly contains two kinds traditionally, first kind is to utilize cross valve to change the operating mode of unit, actual is to switch to summer condition indoor heat pump is arrived outdoor heat exchanger, make it become condenser, thereby rotate back into winter heating's operating mode after the heating defrosting, defrosting again; Second kind of way is just to embed electrical heating elements in outdoor heat exchanger heat transfer face during fabrication, autostop and connect heating heating with defrosting after frosting acquires a certain degree.No matter but any mode heats process and all must stop, and all will consume extra electric energy for defrosting.The consumption of this additional electrical energy can account for and heat 10% of process power consumption.
Summary of the invention
The objective of the invention is in order to solve above-mentioned existing air source gas-fired heat pump and to work in the winter time needs and often shut down the problem of carrying out defrosting; designing a kind of can the shutdown under low temperature condition can defrosting and operate as normal simple and reasonable, the high-temperature flue gas that directly utilizes gas engine to discharge carries out local defrosting in turn to the heating surface of outdoor heat exchanger frosting scanning defrosting formula air source gas-fired heat pump.
Basic design of the present invention is to utilize the high-temperature flue gas that gas engine discharges (its temperature can up to 300--400oC) to defrost.But, want to utilize flue gas heat to all heating and prevent that frosting from being impracticable at all of the heating surface of outdoor heat exchanger frosting because of the air mass flow of this flue gas flow much smaller than its outdoor heat exchanger of flowing through.Find that after further study the face velocity of outdoor evaporimeter is not too high, is generally 1.5-3m/s, so after defrosting, can keep heating the cycle about a hour.If the flue gas scanning defroster of the less injection flue gas that can move along the circulation of heat exchanger windward side of area is installed near the heat exchanger windward side, directly wash away this localized heat transfer face with whole high-temperature flue gas, the heat transfer temperature difference that defrosts this moment is hundred times of frosting heat transfer temperature difference, and can suitably design the exhanst gas outlet flow velocity and also be higher than the flow through flow velocity of heat exchanger of air, total heat-transfer capability of defrosting is accompanied on frosting speed hundreds of.Simultaneously make the cycle that this cycle period that washes away can operate as normal after conventional defrosting much smaller than it on the structural design; just can be melted rapidly and blown away only accumulating the frost that minute quantity is arranged on the heat-transfer area; and this defrosting can be carried out under non-stop-machine situation fully, so thoroughly the end has solved the difficult problem that existing air source gas-fired heat pump needs often to shut down defrosting.
Scanning defrosting formula air of the present invention source gas-fired heat pump, its structure comprises gas engine, freon compressore, cross valve, indoor heat exchanger, choke valve and outdoor heat exchanger, also comprise flue gas triple valve and flue gas scanning defroster, described flue gas scanning defroster be area less can spray the device of flue gas to the heating surface of outdoor heat exchanger frosting along what the circulation of outdoor heat exchanger windward side was moved, the input of flue gas triple valve is connected with the exhaust opening of gas engine, an output of flue gas triple valve is connected through the inlet end of fume pipe and flue gas scanning defroster, another output of flue gas triple valve through fume pipe discharge outdoor or behind heat-exchanging water tank discharge outdoor.
Above-mentioned flue gas scanning defroster can be designed to multiple structure, when being the circular cell external heat exchanger for outdoor heat exchanger, but its flue gas scanning defroster respective design becomes rotary-type scanning defroster, its a kind of structure comprises that stay pipe and push pipe are provided with the Π type rotation air jet pipe of rotation seat, described stay pipe is packed in the center of circular cell external heat exchanger, the Π type rotates air jet pipe is installed in stay pipe through rotation seat top, two nanubriums of Π type rotation air jet pipe are lifted on the outside of circular cell external heat exchanger, the nanubrium inboard is provided with fumarole, fumarole is communicated with the stay pipe upper end through nanubrium and push pipe, and the stay pipe lower end is the inlet end of flue gas scanning defroster.
When being plate heat exchanger for outdoor heat exchanger, but its flue gas scanning defroster respective design becomes horizontal mobile scanning defroster, its a kind of structure comprises stay pipe, knuckle joint formula telescoping tube, air jet pipe and linear reciprocating apparatus, described linear reciprocating apparatus is contained in plate heat exchanger top, air jet pipe laterally is installed on the linear reciprocating apparatus, the air jet pipe below is provided with fumarole, one end of knuckle joint formula telescoping tube is communicated with air jet pipe through elbow joint, the other end of knuckle joint formula telescoping tube is communicated with the stay pipe front end through elbow joint, and the stay pipe rear end is the inlet end of flue gas scanning defroster.
Above-mentioned linear reciprocating apparatus comprises motor, screw mandrel, internal thread slide block and support, support is installed on the housing of plate heat exchanger, and the screw mandrel level is installed in the support two ends, motor-driven screw mandrel forward or reverse, the internal thread slide block is contained on the screw mandrel, and air jet pipe is installed on the internal thread slide block.
In order to purify flue gas, gas cleaning porcelain ring can be housed in stay pipe.
Scanning defrosting formula air of the present invention source gas-fired heat pump; the high-temperature flue gas that utilizes gas engine to discharge carries out local circulation scan-type rapid frost melting to outdoor heat exchanger; thereby air source gas-fired heat pump can not shut down under low temperature or condition of ultralow temperature get final product defrosting and operate as normal, thoroughly the end, solved the difficult problem that existing air source gas-fired heat pump needs often to shut down defrosting.And there is not the defrosting energy loss.Be the upgrading products of existing air source gas-fired heat pump.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the present invention;
Among the figure 1 is gas engine, the 2nd, and freon compressore, the 3rd, cross valve, the 4th, indoor heat exchanger, the 5th, indoor blower fan, the 6th, choke valve, the 7th, outdoor heat exchanger, the 8th, outdoor blower fan, the 9th, the Π type rotates air jet pipe, the 10th, stay pipe, the 11st, gas cleaning porcelain ring, the 12nd, rotation seat, the 13rd, nanubrium, the 14th, flue gas triple valve.
Accompanying drawing 2 is that A-A in the accompanying drawing 1 is to view;
Accompanying drawing 3 is structural representations of a kind of horizontal mobile scanning defroster of the present invention;
Among the figure 20 is knuckle joint formula telescoping tubes, the 21st, and air jet pipe, the 22nd, plate heat exchanger, the 23rd, screw mandrel, the 24th, internal thread slide block, the 25th, support, the 26th, motor.
The specific embodiment
Referring to accompanying drawing 1, scanning defrosting formula air of the present invention source gas-fired heat pump, comprise gas engine 1, freon compressore 2, cross valve 3, indoor heat exchanger 4, choke valve 6 and outdoor heat exchanger 7, also comprise flue gas triple valve 14 and flue gas scanning defroster, described flue gas scanning defroster be area less can spray the device of flue gas to the heating surface of outdoor heat exchanger frosting along what the circulation of outdoor heat exchanger windward side was moved, the input of flue gas triple valve 14 is connected with the exhaust opening of gas engine 1, an output of flue gas triple valve 14 is connected through the inlet end of fume pipe and flue gas scanning defroster, another output of flue gas triple valve 14 through fume pipe discharge outdoor or behind heat-exchanging water tank discharge outdoor.During the low temperature defrosting, place the position of Fig. 1 to get final product on flue gas triple valve 14, during as frostless removing, flue gas triple valve 14 can be placed and discharge fume pipe outdoor or the outdoor position of discharge behind heat-exchanging water tank.
Above-mentioned flue gas scanning defroster can be designed to multiple structure, when being the circular cell external heat exchanger for outdoor heat exchanger, but its flue gas scanning defroster respective design becomes rotary-type scanning defroster, its a kind of structure comprises that stay pipe 10 and push pipe are provided with the Π type rotation air jet pipe of rotation seat 12, described stay pipe 10 is packed in the center of circular cell external heat exchanger 7, the Π type rotates air jet pipe is installed in stay pipe 10 through rotation seat 12 top, two nanubriums 13 of Π type rotation air jet pipe are lifted on the outside of circular cell external heat exchanger 7, nanubrium 13 inboards are provided with fumarole, nanubrium 13 is communicated with stay pipe 10 upper ends through rotation seat 12, and stay pipe 10 lower ends are the inlet end of flue gas scanning defroster.Its structure is referring to accompanying drawing 1 and accompanying drawing 2, and the Π type rotates the air jet pipe useable electric moter and drives around stay pipe 10 rotations, and motor-driven can realize with multiple common mode, does not also just draw in the drawings.
When being plate heat exchanger for outdoor heat exchanger, but its flue gas scanning defroster respective design becomes horizontal mobile scanning defroster, its a kind of structure comprises stay pipe 10, knuckle joint formula telescoping tube 20, air jet pipe 21 and linear reciprocating apparatus, described linear reciprocating apparatus is contained in plate heat exchanger 22 tops, air jet pipe 21 laterally is installed on the linear reciprocating apparatus, air jet pipe 21 belows are provided with fumarole, one end of knuckle joint formula telescoping tube 20 is communicated with air jet pipe 21 through elbow joint, the other end of knuckle joint formula telescoping tube 20 is communicated with stay pipe 10 front ends through elbow joint, and stay pipe 10 rear ends are the inlet end of flue gas scanning defroster.
Above-mentioned linear reciprocating apparatus comprises motor 26, screw mandrel 23, internal thread slide block 24 and support 25, support 25 is installed on the housing of plate heat exchanger 22, screw mandrel 23 levels are installed in support 25 two ends, motor 26 drives screw mandrel 23 forward or reverse, internal thread slide block 24 is contained on the screw mandrel 23, and air jet pipe 21 is installed on the internal thread slide block 24.During work, it is reciprocating along screw mandrel that the internal thread slide block drives air jet pipe, high-temperature flue gas can be sprayed and defrosts to the heating surface of outdoor heat exchanger frosting with the local circulation scan mode.Adjust the reason motor speed and can adjust the scanning arrangement degree of air jet pipe easily, to realize best defrosting effect.
In order to purify flue gas, gas cleaning porcelain ring 11 can be housed in stay pipe 10.The flue gas that sprays to outdoor heat exchanger is more cleaned, after long-term work, the porcelain ring that pollutes can be taken out and to clean decontamination easily.
Claims (5)
1. one kind scans defrosting formula air source gas-fired heat pump, comprise gas engine, freon compressore, cross valve, indoor heat exchanger, choke valve and outdoor heat exchanger, it is characterized in that also comprising flue gas triple valve and flue gas scanning defroster, described flue gas scanning defroster be area less can spray the device of flue gas to the heating surface of outdoor heat exchanger frosting along what the circulation of outdoor heat exchanger windward side was moved, the input of flue gas triple valve is connected with the exhaust opening of gas engine, an output of flue gas triple valve is connected through the inlet end of fume pipe and flue gas scanning defroster, another output of flue gas triple valve through fume pipe discharge outdoor or behind heat-exchanging water tank discharge outdoor.
2. scanning defrosting formula air as claimed in claim 1 source gas-fired heat pump, it is characterized in that described flue gas scanning defroster comprises that stay pipe and push pipe are provided with the Π type rotation air jet pipe of rotation seat, described stay pipe is packed in the center of circular cell external heat exchanger, the Π type rotates air jet pipe is installed in stay pipe through rotation seat top, two nanubriums of Π type rotation air jet pipe are lifted on the outside of circular cell external heat exchanger, the nanubrium inboard is provided with fumarole, nanubrium is communicated with the stay pipe upper end through rotation seat, and the stay pipe lower end is the inlet end of flue gas scanning defroster.
3. scanning defrosting formula air as claimed in claim 1 source gas-fired heat pump, it is characterized in that described flue gas scanning defroster comprises stay pipe, knuckle joint formula telescoping tube, air jet pipe and linear reciprocating apparatus, described linear reciprocating apparatus is contained in plate heat exchanger top, air jet pipe laterally is installed on the linear reciprocating apparatus, the air jet pipe below is provided with fumarole, one end of knuckle joint formula telescoping tube is communicated with air jet pipe through elbow joint, the other end of knuckle joint formula telescoping tube is communicated with the stay pipe front end through elbow joint, and the stay pipe rear end is the inlet end of flue gas scanning defroster.
4. scanning defrosting formula air as claimed in claim 3 source gas-fired heat pump, it is characterized in that described linear reciprocating apparatus comprises motor, screw mandrel, internal thread slide block and support, support is installed on the housing of plate heat exchanger, the screw mandrel level is installed in the support two ends, motor-driven screw mandrel forward or reverse, the internal thread slide block is contained on the screw mandrel, and air jet pipe is installed on the internal thread slide block.
5. as claim 2 or 3 or 4 described scanning defrosting formula air source gas-fired heat pumps, it is characterized in that being equipped with in the described stay pipe gas cleaning porcelain ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010593147A CN102003835B (en) | 2010-12-17 | 2010-12-17 | Scanning defrost type air-source gas heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010593147A CN102003835B (en) | 2010-12-17 | 2010-12-17 | Scanning defrost type air-source gas heat pump |
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| Publication Number | Publication Date |
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| CN102003835A true CN102003835A (en) | 2011-04-06 |
| CN102003835B CN102003835B (en) | 2012-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010593147A Expired - Fee Related CN102003835B (en) | 2010-12-17 | 2010-12-17 | Scanning defrost type air-source gas heat pump |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106679237A (en) * | 2016-12-29 | 2017-05-17 | 河北天正新能源科技股份有限公司 | Novel air source heat pump |
| CN106642850B (en) * | 2016-12-27 | 2019-04-16 | Tcl空调器(中山)有限公司 | The control method of defroster, air conditioner and defroster |
| CN110173751A (en) * | 2019-06-11 | 2019-08-27 | 山东省食品发酵工业研究设计院 | A kind of total heat recovery type integrated gas heat pump heat supply unit and its application |
| CN111336684A (en) * | 2020-03-19 | 2020-06-26 | 宁波市成大机械研究所 | Environment-friendly defrosting type air source gas heat pump |
| CN111735117A (en) * | 2020-07-23 | 2020-10-02 | 珠海格力电器股份有限公司 | Air conditioner, defrosting method and device for air conditioner external unit and storage medium |
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2010
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Patent Citations (6)
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106642850B (en) * | 2016-12-27 | 2019-04-16 | Tcl空调器(中山)有限公司 | The control method of defroster, air conditioner and defroster |
| CN106679237A (en) * | 2016-12-29 | 2017-05-17 | 河北天正新能源科技股份有限公司 | Novel air source heat pump |
| CN110173751A (en) * | 2019-06-11 | 2019-08-27 | 山东省食品发酵工业研究设计院 | A kind of total heat recovery type integrated gas heat pump heat supply unit and its application |
| CN110173751B (en) * | 2019-06-11 | 2021-04-13 | 山东省食品发酵工业研究设计院 | Total heat recovery type integrated gas heat pump heat supply unit and application thereof |
| CN111336684A (en) * | 2020-03-19 | 2020-06-26 | 宁波市成大机械研究所 | Environment-friendly defrosting type air source gas heat pump |
| CN111336684B (en) * | 2020-03-19 | 2021-09-10 | 佛山市顺德区思睿德电器有限公司 | Environment-friendly defrosting type air source gas heat pump |
| CN111735117A (en) * | 2020-07-23 | 2020-10-02 | 珠海格力电器股份有限公司 | Air conditioner, defrosting method and device for air conditioner external unit and storage medium |
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| CN102003835B (en) | 2012-10-17 |
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