CN207035357U - The anti-defrosting system of net for air-source heat pump units dry-air blast - Google Patents
The anti-defrosting system of net for air-source heat pump units dry-air blast Download PDFInfo
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- CN207035357U CN207035357U CN201720610520.3U CN201720610520U CN207035357U CN 207035357 U CN207035357 U CN 207035357U CN 201720610520 U CN201720610520 U CN 201720610520U CN 207035357 U CN207035357 U CN 207035357U
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Abstract
The utility model discloses a kind of anti-defrosting system of net for air-source heat pump units dry-air blast, it is made up of the first centrifugal blower, the second centrifugal blower, rotary dehumidifier, regeneration heat regenerator, soundproofing static pressure tank, regenerated air heater, oil circulating pump, hotline heater and level pressure oil expansion tank, and rotary dehumidifier is used as dehumidizer by the use of the solid-state lithium chloride adhered on runner；Above-mentioned part is connected with each other three subsystems of composition by pipeline：Air dewetting subsystem, lithium chloride regeneration subsystem and regenerated heat supply subsystem.The utility model solves frost when source pump is run in the winter time by the combined use of three systems.
Description
Technical field
It the utility model is related to large-scale air source heat pump air-conditioner field, more particularly to large-scale air source heat pump air-conditioner winter fortune
The frost prevention field of row operating mode.
Background technology
Large-scale air source source pump is to realize that " summer is for air conditioning (water), winter by the inverse circulation of therrmodynamic system
It is hot (water) for idle call " air-conditioning equipment.In the winter time under supplying thermal condition, net for air-source heat pump units can realize " consumption part electricity
Can, obtain being several times as much as the heat energy of institute's consuming electric power " purpose, thus supplied with " directly utilizing electric energy " or " directly consuming fuel " etc.
The energy-saving benefit and environmental benefit that hot mode can not possess.Therefore, thermoelectricity co-generating heat supplying mode can not used to carry out concentration confession
The area of heat, net for air-source heat pump units are widely applied.
In the winter time under service condition, frosting often occurs net for air-source heat pump units for evaporator fin and fin tube outer surface
Phenomenon.This phenomenon is larger in air humidity content and air themperature lower ground area is particularly evident.Evaporator fin and finned tube
Outer surface produce frost the reason for be：In outdoor air (its partial pressure is set as p containing a number of water vapourv, it is corresponding
Saturation temperature be tv,s).If the wall surface temperature t of evaporator fin and fin tube outer surfacewLess than water vapour in outdoor air point
Saturation temperature t corresponding to pressurev,s, the partial moisture in air will be condensed into water in evaporator fin and fin tube outer surface
Drop.If now water droplet temperature is less than the freezing point temperature of water under the air pressure, drop will further be solidified as frost layer, be covered in steaming
In the outside wall surface for sending out device；If the wall surface temperature t of evaporator externalwSatisfy not less than corresponding to partial pressure of water vapor in outdoor air
With temperature tv,s, the partial moisture in air would not be condensed into water droplet in the wall of evaporator, would not also be solidified as frost layer.
After evaporator fin and fin tube outer surface are covered by frost layer, the heat transfer resistance of evaporator can increase considerably, from
And the heat capacity of source pump and efficiency is caused to be greatly lowered.Therefore, after frost layer reaches certain thickness, must just take
Measure carries out defrosting.And the defrosting process of source pump, substantial amounts of energy can be not only consumed, but also source pump can be influenceed
Normal operation.Therefore, under the service condition of frosting, source pump is constantly in " frosting-defrosting-frosting-defrosting again again "
In vicious circle, its efficiency is in a very low level all the time.In view of this situation, frost is controlled using effective technical measures
The formation of layer, it is highly profitable for the efficiency for improving source pump.
Theoretically, evaporating temperature is improved under conditions of the partial pressure of water vapour keeps constant, so as to improve evaporator
The wall surface temperature t of fin and fin tube outer surfacew, or containing for outdoor water vapour is reduced under conditions of evaporating temperature is constant
Amount, so as to reduce saturation temperature t corresponding to partial pressure of water vapor in outdoor airv,s, evaporator fin and fin can be caused
The wall surface temperature t of tube outer surfacewMore than saturation temperature t corresponding to partial pressure of water vaporv,s, thus can effectively avoid frost
The generation of layer.But under the winter operation operating mode of air source heat pump, because evaporator needs to absorb heat from outdoor air, institute
Not only to be less than the temperature of outdoor air with its evaporating temperature and it is necessary to ensure certain temperature difference, just can guarantee that normal suction
Thermal effect.Simultaneously as temperature when source pump is run in the winter time in some periods is very low, outdoor air has connect in itself
Nearly saturation state, even if it is very small with the temperature difference of evaporating temperature, evaporator fin and fin tube outer surface also can be inevitable
Ground produces frost.Therefore, by improving evaporating temperature, so as to improve evaporator fin and finned tube hull-skin temperature twControl
The technical measures of frosting processed have significant limitation.
In order to solve this problem,《The experimental study (in June, 2011) of Frostless air-source heat pump system》Disclose one kind
Air source heat pump solution spraying frost prevention technology, the technology are the additional a set of solution sprays of outdoor machine part in conventional air source heat pump
Leaching system, when outdoor environment is in frosting area, open solution spraying system, to the evaporator fin pipe of outdoor unit on spray it is low
The spongy vaporific anti-freezing solution of tool of freezing point, so as to play pair for reducing air dew point temperature and condensed water freezing point temperature
Recast is used, and avoids the generation of frost.Through further inquiring into, there is following both sides in the technology：1. solution spraying
Onto evaporator fin pipe, a thick layer liquid film can be formed on its surface, so as to increase the heat exchanged thermoresistance of evaporator, caused
The reduction of refrigerating capacity and refrigerating efficiency；2. the moisture absorption process of hygroscopic solution, the partial pressure of water vapour is big only in outdoor air
It could occur under conditions of the saturation partial pressure of water vapour corresponding to hygroscopic solution or droplet surface.And corresponding to hygroscopic solution
The saturation partial pressure force value of water vapour, the concentration of hygroscopic solution is depended on again, the concentration of hygroscopic solution is bigger, its solution or drop table
For the saturation partial pressure of water vapour corresponding to face with regard to smaller, the moisture sorption effect of solution is better.Thus, it is ensured that the dehumidifying of outdoor air
Effect, the saturation partial pressure for not requiring nothing more than water vapour corresponding to dehumidification solution have to be lower than the partial pressure of water vapour in outdoor air
Power, and both differences must are fulfilled for necessarily requiring.But for the winter operation operating mode of source pump, due in outdoor air
Partial pressure of water vapor it is smaller, even if hygroscopic solution reaches (maximum) saturated concentration, the saturation partial pressure of its corresponding water vapour
Value still may can not meet the requirement of effect on moisture extraction, or even the phenomenon humidified on the contrary that can not be dehumidified to outdoor air occur.
Utility model content
The purpose of this utility model is to overcome the shortcomings of the above-mentioned anti-defrosting system of air source heat pump solution spraying, is proposed a kind of empty
The anti-defrosting system of air supply heat pump unit dry-air blast, by relatively low or more dry to water capacity is blown on net for air-source heat pump units evaporator fin pipe
Dry air, reach the purpose of frost prevention.
To reach above-mentioned purpose, system of the present utility model uses rotary dehumidifier, and the solid-state chlorine to adhere on runner
Change lithium as dehumidizer, adsorption and dehumidification is carried out to humid air, obtains the relatively dry air that source pump evaporator air intake is used；
The heat that lithium chloride after moisture absorption is supplied using heat-conducting oil heating system carries out desorption and regeneration, recycles.Concrete technical scheme
It is：
A kind of anti-defrosting system of net for air-source heat pump units dry-air blast, it is characterised in that it is by the first centrifugal blower, the second centrifugation wind
It is machine, rotary dehumidifier, regeneration heat regenerator, soundproofing static pressure tank, regenerated air heater, oil circulating pump, hotline heater, fixed
Compression swelling fuel tank is formed, and rotary dehumidifier is used as dehumidizer by the use of the solid-state lithium chloride adhered on runner；Above-mentioned part passes through pipe
Road is connected with each other three subsystems of composition：Air dewetting subsystem, lithium chloride regeneration subsystem and regenerated heat supply subsystem；Its
In：
The annexation of air dewetting subsystem is：The outlet of first centrifugal blower connects rotary dehumidifier by air duct
Dehumidifying area import, rotary dehumidifier outlet by air duct connection regenerate heat regenerator cold medium flow import,
The import that the cold medium process outlet of regeneration heat regenerator passes through air duct joint noise reduction plenum chamber；The outlet of soundproofing static pressure tank
Towards the evaporator of net for air-source heat pump units；
Lithium chloride regeneration subsystem annexation be：The outlet of second centrifugal blower connects regeneration air by air duct
The shell side import of heater, the shell-side outlet of regenerated air heater are entered by the renewing zone of air duct connection rotary dehumidifier
Mouthful, the renewing zone outlet of rotary dehumidifier connects the thermal medium flow import of regeneration heat regenerator, regenerated heat by air duct
The thermal medium process outlet of recover is led in atmospheric environment；
Regenerated heat supply subsystem annexation be：The oil export of hotline heater is added by oil pipe and regeneration air
The tube side import connection of hot device, the tube side of regenerated air heater exports connects oil circulating pump by oil pipe string, then reconnects
To the oil inlet of hotline heater, a conduction oil loop heating system is formed；The bottom of described level pressure oil expansion tank with
Oil pipe in the tube side outlet of regenerated air heater is connected, and expansion space is provided for conduction oil.
The anti-defrosting system method of work of net for air-source heat pump units dry-air blast of the present utility model is as follows：
The dehumidifying of outdoor air：The larger outdoor air of water capacity is initially entered and turned in the presence of the first centrifugal blower
The dehumidifying area of wheel dehumidifier is dehumidified；The part heat of air reclaiming (heat) air in heat regenerator is regenerated after dehumidifying
After amount, by soundproofing static pressure tank into the runner between the finned tube of source pump evaporator, herein into evaporator fin pipe
After refrigerant release heat, drained into the presence of source pump axial flow blower in outdoor environment；
The regeneration of lithium chloride dehumidizer：Surrounding air initially enters regeneration air and added in the presence of the second centrifugal blower
Hot device, after being heated to 120 DEG C or so, into the renewing zone of aluminium chloride rotor dehumidifier, the lithium chloride after moisture absorption is regenerated
Processing；Enter regeneration heat regenerator from the regeneration air of rotary dehumidifier outflow, air ring is discharged into after discharging partial heat
In border；
The heat supply of regenerated air heater：Conduction oil initially enters heat-conducting oil heating in the presence of oil circulating pump
Device, enter regenerated air heater after being heated to certain temperature, regeneration air is heated；Conduction oil adds in regeneration air
After discharging partial heat in hot device, hotline heater is reentered by return line and oil circulating pump and heated, such as
This moves in circles；Described level pressure oil expansion tank bottom and the peak of heat transfer oil circulation loop are connected, and keep certain oil
Amount, expansion space is provided for conduction oil；Under frost prevention operating mode, oil circulating pump is in running status all the time.
The operation principle of rotary dehumidifier is：The runner of rotary dehumidifier is divided into dehumidifying area and renewing zone Liang Ge regions, removes
Wet area realizes the adsorption and dehumidification function of lithium chloride dehumidizer, and the desorption and regeneration function of lithium chloride dehumidizer is realized in renewing zone；Chlorination
The adsorption and dehumidification of lithium dehumidizer and desorption and regeneration function with runner rotation alternately.
The utility model has the advantages that：
(1) rotary-type solid dehumidifying device is used, it is possible to increase the dehumidification ability of the relatively low Cryogenic air of water capacity, effectively
Avoid frost when source pump is run in the winter time；
(2) conduction oil circulating heater is used, than directly using electrical heating or steam to heat, utilization efficiency of heat energy is high；
(3) using regeneration heat regenerator, it is possible to increase the efficiency of source pump and the heat capacity of source pump；
(4) soundproofing static pressure tank is set, had both alleviated the vibration of various parts, being advantageous to the air after wet down again can be uniformly
Ground flows through evaporator, improves the heat exchange efficiency of evaporator and the heating efficiency of source pump.
Brief description of the drawings
Fig. 1 is the schematic diagram of the example of the utility model
Brief description of the drawings：1- oil circulating pumps, 2- hotline heaters, 3- regenerated air heaters, 4- level pressure oil expansion tanks, 5-
Second centrifugal blower, 6- rotary dehumidifiers, 7- regeneration heat regenerators, 8- net for air-source heat pump units, 9- soundproofing static pressure tanks, 10- the
One centrifugal blower.
Embodiment
Illustrate its embodiment with workflow of the present utility model below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of anti-defrosting system of net for air-source heat pump units dry-air blast, it by conveying humid air the first centrifugal blower
10th, the second centrifugal blower 5, rotary dehumidifier 6, regeneration heat regenerator 7, soundproofing static pressure tank 9, the regeneration air of regeneration air are conveyed
Heater 3, oil circulating pump 1, hotline heater 2, level pressure oil expansion tank 4 are formed；Rotary dehumidifier 6 is made with solid-state lithium chloride
For dehumidizer；Above-mentioned part is connected with each other composition following three subsystem by pipeline：Wherein：
The annexation of air dewetting subsystem is：The outlet of first centrifugal blower 10 connects rotary wheel dehumidifying by air duct
The import in the dehumidifying area of machine 6, the outlet of rotary dehumidifier 6 connect the cold medium flow of regeneration heat regenerator 7 by air duct
Import, regenerate the import that the cold medium process outlet of heat regenerator 7 passes through air duct joint noise reduction plenum chamber 9；Noise reduction static pressure
Evaporator of the outlet of case 9 towards net for air-source heat pump units 8；
Lithium chloride regeneration subsystem annexation be：The outlet of second centrifugal blower 5 connects regeneration sky by air duct
The shell side import of hot-air heater 3, the shell-side outlet of regenerated air heater 3 connect rotary dehumidifier 6 again by air duct
Raw area's import, the renewing zone outlet of rotary dehumidifier 6 are entered by the thermal medium flow of air duct connection regeneration heat regenerator 7
Mouthful, the thermal medium process outlet of regeneration heat regenerator 7 is led in atmospheric environment；
Regenerated heat supply subsystem annexation be：The oil export of hotline heater 2 passes through oil pipe and regeneration air
The tube side import connection of heater 3, the tube side of regenerated air heater 3 exports connects oil circulating pump 1, Ran Houzai by oil pipe string
The oil inlet of hotline heater 2 is connected to, forms a conduction oil loop heating system；The described bottom of level pressure oil expansion tank 4
The peak of portion and heat transfer oil circulation loop is connected, and keeps certain oil mass, and expansion space is provided for conduction oil.
The anti-defrosting system method of work of net for air-source heat pump units dry-air blast of the present utility model is as follows：
The dehumidifying of outdoor air：The larger outdoor air of water capacity initially enters in the presence of the first centrifugal blower 10
The dehumidifying area of rotary dehumidifier 6 is dehumidified；Air reclaiming in the cold medium flow of regeneration heat regenerator 7 after dehumidifying
After the partial heat of air, by soundproofing static pressure tank 9 into the runner between the evaporator fin pipe of source pump 8, to evaporator
After interior refrigerant release heat, drained into the presence of source pump axial flow blower in outdoor environment；
The regeneration of lithium chloride dehumidizer：Surrounding air initially enters regeneration air and added in the presence of the second centrifugal blower 5
After hot device 3 is heated to 120 DEG C or so, into the renewing zone of aluminium chloride rotor dehumidifier 6, regeneration treatment is carried out to lithium chloride；From
The regeneration air that rotary dehumidifier 6 flows out enters in the thermal medium flow of regeneration heat regenerator 7, is discharged after discharging partial heat
Into atmospheric environment；
The supply of regenerated air heater heat：Conduction oil initially enters heat-conducting oil heating in the presence of oil circulating pump 1
Device 2, enter regenerated air heater 3 after being heated to certain temperature, regeneration air is heated；Conduction oil is in regeneration air
After discharging partial heat in heater 3, hotline heater 2 is reentered by return line and oil circulating pump 1 and added
Heat, so move in circles；Level pressure oil expansion tank 4 is arranged on the peak of heat transfer oil circulation loop and keeps certain oil level；
Temperature sensor is set on the oil pipe line of the outlet of hotline heater 2, heat-conducting oil heating is controlled according to the temperature range of setting
The start and stop of device；Under frost prevention operating mode, oil circulating pump is in running status all the time.
Claims (1)
1. a kind of anti-defrosting system of net for air-source heat pump units dry-air blast, it is characterised in that it is by the first centrifugal blower, the second centrifugation wind
Machine, rotary dehumidifier, regeneration heat regenerator, soundproofing static pressure tank, regenerated air heater, oil circulating pump, hotline heater and
Level pressure oil expansion tank is formed, and rotary dehumidifier is used as dehumidizer by the use of the solid-state lithium chloride adhered on runner；Above-mentioned part passes through
Pipeline is connected with each other three subsystems of composition：Air dewetting subsystem, lithium chloride regeneration subsystem and regenerated heat supply subsystem；
Wherein：
The annexation of air dewetting subsystem is：The outlet of first centrifugal blower connects removing for rotary dehumidifier by air duct
The import in wet area, the outlet of rotary dehumidifier connect the cold medium flow import of regeneration heat regenerator by air duct, regeneration
The import that the cold medium process outlet of heat regenerator passes through air duct joint noise reduction plenum chamber；The outlet of soundproofing static pressure tank leads to
The evaporator of net for air-source heat pump units；
Lithium chloride regeneration subsystem annexation be：The outlet of second centrifugal blower connects regeneration air by air duct and heated
The shell side import of device, the shell-side outlet of regenerated air heater connect the renewing zone import of rotary dehumidifier by air duct,
The renewing zone outlet of rotary dehumidifier connects the thermal medium flow import of regeneration heat regenerator by air duct, regenerates recuperation of heat
The thermal medium process outlet of device is led in atmospheric environment；
Regenerated heat supply subsystem annexation be：The oil export of hotline heater passes through oil pipe and regenerated air heater
Tube side import connection, the tube side of regenerated air heater exports connects oil circulating pump by oil pipe string, is then connected to and leads
The oil inlet of hot oil, form a conduction oil loop heating system；The bottom of described level pressure oil expansion tank and regeneration
Oil pipe in the tube side outlet of air heater is connected, and expansion space is provided for conduction oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720610520.3U CN207035357U (en) | 2017-05-27 | 2017-05-27 | The anti-defrosting system of net for air-source heat pump units dry-air blast |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720610520.3U CN207035357U (en) | 2017-05-27 | 2017-05-27 | The anti-defrosting system of net for air-source heat pump units dry-air blast |
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| CN207035357U true CN207035357U (en) | 2018-02-23 |
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| CN201720610520.3U Expired - Fee Related CN207035357U (en) | 2017-05-27 | 2017-05-27 | The anti-defrosting system of net for air-source heat pump units dry-air blast |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120747A (en) * | 2017-05-27 | 2017-09-01 | 河南理工大学 | The anti-defrosting system of net for air-source heat pump units dry-air blast and its method of work |
| CN110529959A (en) * | 2019-09-11 | 2019-12-03 | 东华大学 | A kind of dehumidification system for runner with pump coupled heat |
-
2017
- 2017-05-27 CN CN201720610520.3U patent/CN207035357U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107120747A (en) * | 2017-05-27 | 2017-09-01 | 河南理工大学 | The anti-defrosting system of net for air-source heat pump units dry-air blast and its method of work |
| CN110529959A (en) * | 2019-09-11 | 2019-12-03 | 东华大学 | A kind of dehumidification system for runner with pump coupled heat |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20180223 |