CN102305442A - Heat energy air-conditioning device and defrosting method thereof - Google Patents
Heat energy air-conditioning device and defrosting method thereof Download PDFInfo
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- CN102305442A CN102305442A CN201110079571A CN201110079571A CN102305442A CN 102305442 A CN102305442 A CN 102305442A CN 201110079571 A CN201110079571 A CN 201110079571A CN 201110079571 A CN201110079571 A CN 201110079571A CN 102305442 A CN102305442 A CN 102305442A
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Abstract
The invention discloses an air-conditioning device and a defrosting method thereof. The air-conditioning device comprises a compressor, an outdoor heat exchanger, an indoor heat exchanger, a four-way valve, an outdoor expansion valve and an indoor expansion valve, wherein the compressor is driven by using a set of power device based on organic Rankine cycle; and the power device comprises an evaporator, a turbo machine, a condenser and a cycle pump. The air-conditioning device is provided with a plate-type heat exchanger which exchanges heat between the outdoor heat exchanger of the air-conditioning device and tail gas. When the air-conditioning device of a heat pump operates for defrosting, the tail gas which is subjected to expansion working of the turbo machine is discharged into the plate-type heat exchanger through a three-way valve; and a frost layer which is adhered to the surface of the outdoor heat exchanger absorbs heat from the tail gas and is then removed. The air-conditioning device always keeps stable heating operation, so electric energy is saved, and a heating effect is good.
Description
Technical field
The present invention relates to a kind of conditioner and Defrost method thereof, the particularly a kind of low-temperature heat source of nature existence or conditioner and Defrost method thereof that thermals source such as industrial exhaust heat, used heat promote compressor operation of utilizing.
Background technology
At present, general heat pump air conditioner reduces with ambient temperature when getting into winter heating's work, and heating effect descends rapidly.Reason is that through compressor compresses, low-temp low-pressure gas is transformed into high temperature and high pressure gas after low-temp low-pressure gas in the vapour liquid separator (cold-producing medium after the gasification) is inhaled into compressor, under the control of cross valve, gets into and heats circulation.In heating circulation, high temperature and high pressure gas gets into indoor heat converter (condenser), carries out heat exchange with indoor environment, and at this moment, high temperature and high pressure gas is transformed into low-temp low-pressure liquid.Low-temp low-pressure liquid improves its pressure, in outdoor heat converter (evaporimeter) through expansion valve; Be transformed into gas or gas-liquid mixture, while absorbing environmental heat is then under the control of cross valve; Get into vapour liquid separator; Accomplish one and heat circulation, this process circulates repeatedly, accomplishes the process that heats of low-temperature heat pump air conditioner.In evaporimeter, when low-temp low-pressure liquid is transformed into gas or gas-liquid mixture, the absorbing environmental heat; During low and high humidity, be prone to cause the frosting of external condensation device when ambient temperature, the off-premises station heat exchange efficiency is reduced; And be easy to generate back liquid, compressor is burnt in long-term operation easily.Along with the formation of frost layer, the performance of unit descends, and operating mode worsens, and heating capacity also will descend.Its finned coil heat exchanger, because evaporating temperature is lower, outdoor temperature is lower, the temperature of coil surface also descends thereupon.When outdoor air was flowed through coil pipe under blower fan drives, its contained moisture will be separated out and be attached to coil surface and formed the frost layer.Relative air humidity is big more, and the coil pipe frosting is just serious more.
The Defrost method of heat pump air conditioner generally adopts the way that changes refrigerant flow direction at present.That is to say, when air-conditioner need defrost, transfer air-conditioner to the refrigeration mode operation, make the off-premises station heat exchanger play the condenser effect, this moment, refrigerant can be emitted heat, utilized this heat that frosting is melted.After air-conditioner gets into heating operation; Generally want continuous operation after 50 minutes, computer begins the coil temperature of continuous detecting off-premises station heat exchanger, if this temperature is less than 11 ℃; Then air-conditioner gets into Defrost operation; The control cross valve makes air-conditioner get into kind of refrigeration cycle, and general defrosting time is no more than 5 minutes.In defrost process, computer is the coil temperature of continuous detecting off-premises station heat exchanger, and picks up counting from defrosting, and when detected coil temperature rises to 10 ℃ or time of defrosting when having reached 8 minutes, defrosting just finishes automatically.This moment, compressor also stopped.After 10 seconds, cross valve switches to and heats the position, and through after 1 minute, air-conditioner gets into the state of heating again again.
Use the heat pump air conditioner of present automatic defrosting technology to make heat pump entering refrigerating operaton state realize that it influences the whole heating effect of heat pump, causes energy dissipation through the four-way change-over valve switching.
Summary of the invention
According to the deficiency of above existing heat pump air conditioner Defrost technology, in conjunction with the characteristics of air conditioner of heat energy of the present invention self, the present invention proposes heat pump air conditioner and the automatic defrosting method thereof that a kind of using waste heat from tail gas that utilizes the power set of air conditioner of heat energy prevents the condenser frosting.
The present invention realizes that through following technical scheme in this conditioner, off-premises station comprises compressor, cross valve, outdoor heat converter (1 or many), outdoor expansion valve, bypass and plate type heat exchanger.Indoor set comprises indoor heat converter (1 or many) and indoor expansion valve.Utilize the switching of cross valve, when refrigerating operaton, outdoor heat converter is equivalent to condenser, and indoor heat converter is equivalent to evaporimeter, and the evaporation heat absorption that utilizes cold-producing medium is with indoor refrigeration.When cross valve switches to when heating state, outdoor heat converter is equivalent to evaporimeter, and indoor heat converter is equivalent to condenser, utilizes the condensation of refrigerant heat release with indoor heating.
The compressor of this conditioner is not or do not rely on electric power to drive entirely, but utilizes a turbine to drive, and said turbine is connected on the power set of a cover based on the organic Rankine circulation.These power set comprise evaporimeter, turbine, condenser and circulating pump.Through pipeline these four parts are linked to be the loop in order, cycle fluid circulates in the loop.
When system works, the cycle fluid evaporimeter of flowing through, absorb the heat of external heat source after vaporization become high steam, the high steam acting of in turbine, expanding, the merit amount of output passes to compressor.Steam after the acting becomes the tail gas of low-temp low-pressure.Consider that this tail gas still has the recyclable utilization of certain heat, the present invention is provided with the plate type heat exchanger that the outdoor heat converter that makes aircondition and said tail gas carry out heat exchange.To be communicated to an electrodynamic type triple valve V1 through the tail gas after the turbine expansion acting, this electrodynamic type triple valve V1 have with said tail gas import said power set condenser first opening and said tail gas imported second opening of said plate type heat exchanger.When heat pump air conditioner was in normal heating operation, electrodynamic type triple valve V1 entered condenser with said tail gas through first opening, is condensed into liquid state after circulating pump is sent liquid refrigerant into evaporimeter and carries out new circulation; When heat pump air conditioner is in Defrost operation; Electrodynamic type triple valve V1 enters said tail gas the said plate type heat exchanger of outdoor heat converter side through second opening; Tail gas and outdoor heat converter carry out heat exchange; The frost layer of outdoor heat converter surface attachment absorbs heat and melts from tail gas, said tail gas enters said condenser again behind plate type heat exchanger, be condensed into liquid state after circulating pump is sent liquid refrigerant into evaporimeter and carry out new circulation.Air-conditioning then remains the stable running that heats, and saves electric energy, and heating effect is good.
The evaporimeter of said power set is a heat-exchange device, and in this heat-exchange device, the origin of heat that cycle fluid absorbs is in the existing thermal source of nature, and for example solar energy, geothermal energy perhaps derive from industrial exhaust heat used heat etc.Can adopt totally-enclosed, semiclosed between these power set and the compressor or open type is connected, when the merit quantity not sufficient of this power set output when satisfying the cooling and warming demand, can replenish and come Driven Compressor with electric power.
Description of drawings
Below in conjunction with accompanying drawing the present invention is done further detailed explanation.
Fig. 1 is the systematic schematic diagram of expression conditioner of the present invention.
The specific embodiment
Conditioner as shown in Figure 1 has off-premises station 1, indoor set 2 and control device 3.Be equipped with compressor 11 on the off-premises station 1, be provided with reservoir 12 in the suction side of this compressor 11, be provided with cross valve 13 at exhaust side, behind this cross valve 13, set outdoor heat converter 14 and outdoor expansion valve 15 successively, said expansion valve 15 is provided with bypass 17.Dispose outdoor fan 18 with outdoor heat converter 14 adjacency.In addition, can adopt totally-enclosed, semiclosed between compressor 11 and the power set 4 or open type is connected.Indoor set 2 comprises indoor heat converter 21 and indoor expansion valve 23, disposes indoor fan 22 with indoor heat converter 21 adjacency.
Utilize control device 3 to switch cross valve 13, thereby conditioner is set at refrigerating operaton or heating operation.When control device 3 switched to refrigerating operaton with cross valve, cold-producing medium flowed as dotted arrow, and outdoor heat converter 14 constitutes condensers, and indoor heat converter 21 constitutes evaporimeters, forms the refrigerating operaton state.And when control device 3 switched to heating operation with cross valve, cold-producing medium flowed as the solid line arrow, and indoor heat converter 21 constitutes condensers, and outdoor heat converter 14 constitutes evaporimeters.In addition, said control device 3 is when refrigerating operaton, according to the aperture of expansion valve 23 in the indoor refrigeration duty control room.When heating operation, control device 3 is according to the aperture of expansion valve in the indoor thermic load control room 23 and outdoor expansion valve 15.
In addition, above-mentioned power set 4 comprise: evaporimeter 41, turbine 42, condenser 43, circulating pump 44, through pipeline 45 these four parts are linked to be the loop in order, and cycle fluid 46 circulates in the loop.When system works, cycle fluid 46 evaporimeter 41 of flowing through, absorb the heat of external heat source 47 after vaporization become high steam, the high steam acting of in turbine 42, expanding, the merit amount of output passes to compressor 11.Steam after the acting becomes the tail gas of low-temp low-pressure.Consider that this tail gas still has the recyclable utilization of certain heat, the present invention is provided with the plate type heat exchanger 10 that the outdoor heat converter 14 that makes aircondition and said tail gas carry out heat exchange.To be communicated to an electrodynamic type triple valve V1 through the tail gas after steam turbine 42 expands acting; This electrodynamic type triple valve V1 have with said tail gas import said power set 4 condenser 43 first opening and said tail gas imported second opening of said plate type heat exchanger 10.When heat pump air conditioner was in normal heating operation, electrodynamic type triple valve V1 entered condenser 43 with said tail gas through first opening, is condensed into liquid state after circulating pump 44 is sent liquid refrigerant into evaporimeter 41 and carries out new circulation; When heat pump air conditioner is in Defrost operation; Electrodynamic type triple valve V1 enters said tail gas the said plate type heat exchanger 10 of outdoor heat converter 14 sides through second opening; Tail gas and outdoor heat converter 14 carry out heat exchange; The frost layer of outdoor heat converter 14 surface attachment absorbs heat and melts from tail gas, said tail gas enters said condenser 43 again behind plate type heat exchanger 10, be condensed into liquid state after circulating pump 44 is sent liquid refrigerant into evaporimeter 41 and carry out new circulation.
In addition, thermal source 47 shown in Figure 1 is connected to evaporimeter 41 through circulating pump 49 and valve 48 encloseds, and hot fluid carries out being back in the thermal source 47 through reflux pipeline 50 after the heat exchange in evaporimeter 41.Said thermal source 47 can also be the power station cooling water system for the solar thermal collector of hot water can be provided, and smelting industry, petrochemical industry, cement sectors etc. can provide other thermal source of waste heat.
More than show and described basic principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should be appreciated that; The present invention is not restricted to the described embodiments; That describes in the foregoing description and the specification just explains principle of the present invention; Under the prerequisite that does not break away from spirit and scope of the invention, the present invention also has various changes and modifications, and these variations and improvement all fall in the scope of the invention that requires protection.The present invention requires protection domain to be defined by appending claims and equivalent thereof.
Claims (3)
1. conditioner and Defrost method thereof; Comprise compressor, outdoor heat converter, indoor heat converter, cross valve, outdoor expansion valve, indoor expansion valve; And an individual cover is used for the turbine of Driven Compressor running; Said turbine is connected on the power set of a cover based on the organic Rankine circulation; These power set comprise evaporimeter, turbine, condenser and circulating pump, it is characterized in that, the present invention also is provided with plate type heat exchanger and the triple valve that the outdoor heat converter that makes aircondition and said tail gas carry out heat exchange.
2. conditioner according to claim 1 and Defrost method thereof; It is characterized in that; Said triple valve is the electrodynamic type triple valve; It has tail gas with said power set import said power set condenser first opening and said tail gas imported second opening of said plate type heat exchanger.
3. according to claim 1 and described conditioner of claim 2 and Defrost method thereof; It is characterized in that; When heat pump air conditioner is in normal heating operation; Electrodynamic type triple valve V1 enters condenser with said tail gas through first opening, and when heat pump air conditioner was in Defrost operation, electrodynamic type triple valve V1 entered said tail gas the said plate type heat exchanger of outdoor heat converter side through second opening; Tail gas and outdoor heat converter carry out heat exchange, and the frost layer of outdoor heat converter surface attachment absorbs heat and melts from tail gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110079571A CN102305442A (en) | 2011-03-30 | 2011-03-30 | Heat energy air-conditioning device and defrosting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110079571A CN102305442A (en) | 2011-03-30 | 2011-03-30 | Heat energy air-conditioning device and defrosting method thereof |
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| Publication Number | Publication Date |
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| CN102305442A true CN102305442A (en) | 2012-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110079571A Pending CN102305442A (en) | 2011-03-30 | 2011-03-30 | Heat energy air-conditioning device and defrosting method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017142496A1 (en) | 2016-02-18 | 2017-08-24 | Vural Erdal | A cooling and electricity generation system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1517632A (en) * | 2003-01-13 | 2004-08-04 | Lg������ʽ���� | Duplex air governor with defrost equipment |
| EP1788323A1 (en) * | 2004-07-30 | 2007-05-23 | Mitsubishi Heavy Industries, Ltd. | Air refrigerant type cooling apparatus |
| CN101072935A (en) * | 2004-07-22 | 2007-11-14 | 开利公司 | Combined rankine and vapor compression cycles |
-
2011
- 2011-03-30 CN CN201110079571A patent/CN102305442A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1517632A (en) * | 2003-01-13 | 2004-08-04 | Lg������ʽ���� | Duplex air governor with defrost equipment |
| CN101072935A (en) * | 2004-07-22 | 2007-11-14 | 开利公司 | Combined rankine and vapor compression cycles |
| EP1788323A1 (en) * | 2004-07-30 | 2007-05-23 | Mitsubishi Heavy Industries, Ltd. | Air refrigerant type cooling apparatus |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017142496A1 (en) | 2016-02-18 | 2017-08-24 | Vural Erdal | A cooling and electricity generation system |
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