CN101581522B - Method for preventing air-source heat pump from frosting up - Google Patents
Method for preventing air-source heat pump from frosting up Download PDFInfo
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- CN101581522B CN101581522B CN2009100718961A CN200910071896A CN101581522B CN 101581522 B CN101581522 B CN 101581522B CN 2009100718961 A CN2009100718961 A CN 2009100718961A CN 200910071896 A CN200910071896 A CN 200910071896A CN 101581522 B CN101581522 B CN 101581522B
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Abstract
The invention relates to a method for preventing a heat pump from frosting up, in particular to a method for preventing an air-source heat pump from frosting up. The invention aims to solve the problems that the outdoor unit of the existing air-source heat pump unit is subject to frosting and frosting up again, the cost of defrosting is high, the indoor comfort level is low and the compressor canbe impacted. The method comprises the following steps: (1) adding solution with low freezing point to a collecting tank, and starting a solution pump so that the solution can be absorbed into the solution pump; (2) spraying the solution which is fed into a first solution spraying tube in a mist form when the pressure intensity in the solution pump is adjusted to 60kPa to 80kPa, and carrying out the heat and moisture exchange with the outdoor air so that the solution drips into the collecting tank finally; spraying the solution which is fed into a second solution spraying tube onto the surfacesof finned tubes of an outdoor heat exchanger, and carrying out the heat and moisture exchange with the outdoor air so that the solution flows back to the collecting tank and is further fed into a dilute solution tank via pipelines. The invention is used for preventing the outdoor heat exchanger of the air-source heat pump from frosting up.
Description
Technical field
The present invention relates to the method that a kind of heat pump prevents frosting.
Background technology
Air source heat pump receives increasing concern as a kind of heat-supplying mode of energy-conserving and environment-protective.But in running, there is the frosting phenomenon in outdoor heat exchanger.The existence of frost layer has had a strong impact on the heating performance of unit, therefore needs in time the frost layer to be removed.How to realize defrosting timely and effectively and become a problem of demanding urgently.
Existing Defrost mode is a lot, but all has problem in various degree, sums up and gets up to mainly contain following problem: 1, natural Defrost mode, need interrupt compressor operating during defrosting, and just can move when requiring outside air temperature greater than 2～3 ℃, limitation is big; 2, electric defrosting mode, what consumed is high-quality electric energy, energy utilizes unreasonable, defrosting expense height; 3, waterpower Defrost mode need be provided with water system, and defrosting when finishing moisture big, quicken frosting once more easily; 4, reverse cycle defrosting mode, in the defrost process, indoor set is as evaporimeter, from indoor heat-obtaining.On the one hand, heat pump stops to indoor heating, and on the other hand, from indoor heat-obtaining, indoor set is blown a cold wind over.Defrosting time is long, and indoor comfort is poor; 5, hot-gas bypass Defrost mode, the defrosting energy is from the high-temperature exhaust air of compressor, and defrosting time is long, and suction superheat is low, and simultaneously, high-temperature exhaust air pressure height produces certain impact, the safety that jeopardizes compressor to compressor.
Various in sum Defrost modes exist all that efficient is low, the problem of stability of a system difference, and it solves on the defrosting aspect after thought still rests on frosting, and does not further go thinking how fundamentally to stop frosting.
Summary of the invention
The objective of the invention is to exist the problem of frosting phenomenon and defrosting expense height, easily frosting once more, indoor comfort difference and impact compress machine, proposed a kind of method of preventing air-source heat pump from frosting up for the off-premises station that solves present net for air-source heat pump units.
The present invention solves the problems of the technologies described above the technical scheme of taking to be: the described step of the method for frosting that prevents is: one, add low-freezing solution in collecting tank after the liquid level of solution is higher than screen pack, open solution pump, low-freezing solution in the collecting tank is inhaled in the solution pump after filtering through screen pack; When two, pressure reaches 60kpa～80kpa in the regulator solution pump, low-freezing solution in the solution pump is in solution pump is transported to the first solution spraying pipe and the second solution spraying pipe, be transported to that low-freezing spray solution in the first solution spraying pipe nebulizes and carry out with the outdoor air large tracts of land that heat is wet to be exchanged, absorb airborne moisture, reduce by 5 ℃～8 ℃ of air humidity 10%～50% and dew-point temperatures, the low-freezing solution after the wet exchange of heat finally falls back in the collecting tank; Being transported to low-freezing solution in the second solution spraying pipe sprays to and carries out on the surface of outdoor heat exchanger finned tube and with outdoor air that heat is wet to be exchanged, make the temperature on outdoor heat exchanger finned tube surface reduce by 3 ℃-5 ℃, the temperature on outdoor heat exchanger finned tube surface is lower than 0 ℃, low-freezing flow of solution after the wet exchange of heat is got back in the collecting tank, and the low-freezing solution that enters in the collecting tank is transported in the weak solution jar by pipeline.
The present invention has following beneficial effect: 1. when described heat pump was in the heating condition operation, low-freezing solution was when taking away condensate water, and the condensation heat of condensate water is absorbed by outdoor heat exchanger, had therefore improved unit performance; When described heat pump was in the cooling condition operation, moisture low-freezing solution spraying was to outdoor heat exchanger, and in the regeneration of low-freezing solution, aqueous water becomes gaseous state, absorbs a large amount of heats, improves outdoor heat exchanger running environment, improves unit performance.2. the inventive method has realized the frostless operation of source pump, has avoided regular defrosting, has improved the unit operation environment simultaneously, has effectively improved indoor comfort level.
Description of drawings
Fig. 1 is the fundamental diagram of this method.
The specific embodiment
The specific embodiment one: present embodiment is described in conjunction with Fig. 1, the described step of the method for frosting that prevents is: one, add low-freezing solution in collecting tank 2 after the liquid level of solution is higher than screen pack 5, open solution pump 1, low-freezing solution in the collecting tank 2 is inhaled in the solution pump 1 after filtering through screen pack 5; When two, pressure reaches 60kpa～80kpa in the regulator solution pump 1, low-freezing solution in the solution pump 1 is in solution pump 1 is transported to the first solution spraying pipe 3-1 and the second solution spraying pipe 3-2, be transported to that low-freezing spray solution in the first solution spraying pipe 3-1 nebulizes and carry out with the outdoor air large tracts of land that heat is wet to be exchanged, absorb airborne moisture, reduce by 5 ℃～8 ℃ of air humidity 10%～50% and dew-point temperatures, the low-freezing solution after the wet exchange of heat finally falls back in the collecting tank 2; Being transported to low-freezing solution in the second solution spraying pipe 3-2 sprays to and carries out on the surface of outdoor heat exchanger finned tube 4 and with outdoor air that heat is wet to be exchanged, make the temperature on outdoor heat exchanger finned tube 4 surfaces reduce by 3 ℃-5 ℃, the temperature on outdoor heat exchanger finned tube 4 surfaces is lower than 0 ℃, low-freezing flow of solution after the wet exchange of heat is got back in the collecting tank 2, and the low-freezing solution that enters in the collecting tank 2 is transported in the weak solution jar by pipeline.Described low-freezing solution is ethylene glycol, propane diols or glycerine.
The specific embodiment two: present embodiment is described in conjunction with Fig. 1, be low to moderate screen pack 5 when following when the liquid level of the low-freezing solution in the collecting tank 2 in the described step 1, then open the concentrated solution jar, replenish low-freezing solution in collecting tank 2, the liquid level of the low-freezing solution in collecting tank 2 is higher than till the position of screen pack 5.Other compositions are identical with the specific embodiment one.
The specific embodiment three: in conjunction with Fig. 1 present embodiment is described, described heat pump is in cooling condition when operation, and one, open the weak solution jar, the weak solution jar is delivered to weak solution in the collecting tank 2 by pipeline; Two, flow to the suction side of solution pump 1 after the low-freezing solution in the collecting tank 2 filters through screen pack 5; Three, described low-freezing solution is through after the solution pump 1 increase pressure, low-freezing solution separated into two parts in the solution pump 1 is transported to respectively in the first solution spraying pipe 3-1 and the second solution spraying pipe 3-2, being transported to low-freezing spray solution in the first solution spraying pipe 3-1 nebulizes and contacts with the outdoor air large tracts of land, moisture in the low-freezing solution is evaporated, the concentration of low-freezing solution raises, and finally falls back in the collecting tank 2; Be transported to low-freezing solution in the second solution spraying pipe 3-2 and spray to and carry out on the surface of finned tube 4 of outdoor heat exchanger and with outdoor air that heat is wet to be exchanged, finally flow back in the collecting tank 2, realized the regeneration of low-freezing solution.
Claims (3)
1. the method for a preventing air-source heat pump from frosting up, it is characterized in that the described step of the method for frosting that prevents is: one, in collecting tank (2), add low-freezing solution after the liquid level of solution is higher than screen pack (5), open solution pump (1), low-freezing solution in the collecting tank (2) is inhaled in the solution pump (1) after filtering through screen pack (5); When two, the interior pressure of regulator solution pump (1) reaches 60kpa～80kpa, low-freezing solution in the solution pump (1) is in solution pump (1) is transported to the first solution spraying pipe (3-1) and the second solution spraying pipe (3-2), be transported to that low-freezing spray solution in the first solution spraying pipe (3-1) nebulizes and carry out with the outdoor air large tracts of land that heat is wet to be exchanged, absorb airborne moisture, reduce by 5 ℃～8 ℃ of air humidity 10%～50% and dew-point temperatures, the low-freezing solution after the wet exchange of heat finally falls back in the collecting tank (2); Being transported to low-freezing solution in the second solution spraying pipe (3-2) sprays to and carries out on the surface of outdoor heat exchanger finned tube (4) and with outdoor air that heat is wet to be exchanged, make the temperature on outdoor heat exchanger finned tube (4) surface reduce by 3 ℃-5 ℃, the temperature on outdoor heat exchanger finned tube (4) surface is lower than 0 ℃, low-freezing flow of solution after the wet exchange of heat is got back in the collecting tank (2), and the low-freezing solution that enters in the collecting tank (2) is transported in the weak solution jar by pipeline.
2. the method for preventing air-source heat pump from frosting up according to claim 1, it is characterized in that in the described step 1, when the liquid level of the low-freezing solution in the collecting tank (2) is low to moderate screen pack (5) when following, then open the concentrated solution jar, in collecting tank (2), replenish low-freezing solution, till the liquid level of the low-freezing solution in collecting tank (2) is higher than the position of screen pack (5).
3. the method for preventing air-source heat pump from frosting up according to claim 1 and 2 is characterized in that described low-freezing solution is ethylene glycol, propane diols or glycerine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100718961A CN101581522B (en) | 2009-04-27 | 2009-04-27 | Method for preventing air-source heat pump from frosting up |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100718961A CN101581522B (en) | 2009-04-27 | 2009-04-27 | Method for preventing air-source heat pump from frosting up |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101581522A CN101581522A (en) | 2009-11-18 |
| CN101581522B true CN101581522B (en) | 2011-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100718961A Expired - Fee Related CN101581522B (en) | 2009-04-27 | 2009-04-27 | Method for preventing air-source heat pump from frosting up |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743060A (en) * | 2013-12-24 | 2014-04-23 | 南京协众汽车空调集团有限公司 | Method for heat pump type air-conditioning system defrosting control on basis of air temperature and humidity |
| CN104807264B (en) * | 2014-01-23 | 2017-05-24 | 珠海格力电器股份有限公司 | Heat pump unit frosting restraining method and heat pump unit |
| CN103900310B (en) * | 2014-04-17 | 2016-04-13 | 东南大学 | The system and method for solution dehumidification prevention air source hot pump water heater frosting |
| CN105371524B (en) * | 2014-08-26 | 2018-03-20 | 青岛海尔空调器有限总公司 | Compression-type refrigeration heating air conditioner system and its outdoor machine frost eliminating method |
| CN105299989A (en) * | 2015-12-04 | 2016-02-03 | 山东富特能源管理股份有限公司 | Recycling method for effect-raising anti-freezing solution of air cooled heat pump |
| CN105571220A (en) * | 2016-02-23 | 2016-05-11 | 山东富特能源管理股份有限公司 | Regeneration method for defrosting anti-freezing solution for air cooled heat pump |
| CN105674503A (en) * | 2016-02-26 | 2016-06-15 | 珠海格力电器股份有限公司 | Method and device for controlling air conditioner |
| CN106524596A (en) * | 2016-12-28 | 2017-03-22 | 江苏康泰热交换设备工程有限公司 | Evaporative condensation method and device for air conditioning evaporator |
| CN107741150A (en) * | 2017-10-31 | 2018-02-27 | 江苏天舒电器股份有限公司 | A kind of frostless, Multivariable Coupling type heat pump hot-blast stove control system and its control method |
| CN108120190A (en) * | 2017-11-10 | 2018-06-05 | 山东奇威特太阳能科技有限公司 | A kind of method that absorption installation heat exchanger surface delays frosting |
| CN109780757A (en) * | 2019-01-03 | 2019-05-21 | 大连理工大学 | It is a kind of to press down white heat exchanger certainly using condensability substance |
-
2009
- 2009-04-27 CN CN2009100718961A patent/CN101581522B/en not_active Expired - Fee Related
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| CN101581522A (en) | 2009-11-18 |
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