CN109442824A - A kind of air source heat pump positioning Defrost method and remove defrosting system - Google Patents
A kind of air source heat pump positioning Defrost method and remove defrosting system Download PDFInfo
- Publication number
- CN109442824A CN109442824A CN201811615500.0A CN201811615500A CN109442824A CN 109442824 A CN109442824 A CN 109442824A CN 201811615500 A CN201811615500 A CN 201811615500A CN 109442824 A CN109442824 A CN 109442824A
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- China
- Prior art keywords
- heat exchanger
- exchanger tube
- valve
- defrosting
- frost
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of defrosting cycles
- F25B2347/023—Set point defrosting
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention relates to a kind of heat exchange equipment or air conditioner technical fields, Defrost method is positioned more particularly to a kind of air source heat pump and removes defrosting system, including white core detection device, defrost valve and control device, white core detection device is used to detect frost layer position and the frost density of the heat exchange pipe surface of evaporator, control device controls the aperture of defrosting valve according to the testing result of white core detection device, the valve control that defrosts enters the velocity of medium of heat exchanger tube, by the position and the density that determine heat exchange pipe surface frost layer, analyze frosting critical regions, i.e. white core region, white core region farther out when, the valve opening that defrosts is smaller to which fluid flow rate is fast, it is more in the few heat that can be absorbed to white core region of leading portion heat dissipation, white core region can be removed, so as to avoid remaining frost layer rapid regeneration caused by white core, save the energy.
Description
Technical field
The present invention relates to a kind of heat exchange equipment or air conditioner technical fields, and in particular to a kind of positioning of air source heat pump removes
White method and remove defrosting system.
Background technique
Air conditioner is a kind of common household electrical appliance.When air conditioner is when running heating mode in winter, because refrigerant is in outdoor
Evaporation endothermic in heat exchanger, to reduce the surface temperature of outdoor heat exchanger.If air conditioner is in the case where outdoor temperature is extremely low
Continuous service heating mode, then the surface condensation of outdoor heat exchanger is a large amount of white, to influence the normal work of air conditioner.
Frosting, which reaches a certain level, just needs to carry out defrosting work, but the control methods of existing overwhelming majority defrosting, according to
According to be all with frost thickness be main measurement foundation.However it is divided into part in white core part and frost layer, the ice crystal of white core in frost layer
Basis of the part as frosting, although heat exchanging influential effect is little, ice crystal layer residual will lead to second of frosting and send out rapidly
It is raw.It take frost thickness as the control method of main measurement foundation, it is easy to ice crystal layer residue problem occur, so that frosting meeting again
Quickly occur, so that in need defrost again, it is palliative.
Summary of the invention
It is an object of the invention to provide a kind of air aiming at the problem that current defrosting, which is not thorough, to be caused to need repeatedly to defrost
Source heat pump positions Defrost method and removes defrosting system, can position white core position to remove defrosting core, can be avoided secondary frosting
Rapid regeneration.
In order to achieve the above-mentioned object of the invention, the present invention provides following technical schemes:
A kind of positioning of air source heat pump removes defrosting system, including white core detection device, defrosting valve and control device, the frost core detection
Device is used to detect frost layer position and the frost density of the heat exchange pipe surface of evaporator, and the control device is examined according to the white core
The testing result for surveying device controls the aperture of the defrosting valve, and the defrosting valve control enters the velocity of medium of the heat exchanger tube.
The valve that defrosts is the valve that can control the flow velocity that high temperature refrigerant enters heat exchange pipe of evaporator, when evaporator is defrosted,
For example, the heating outdoor unit heat absorption of winter indoor unit, when needing to defrost to outdoor unit, there are many modes, using recycled back
When, the throttle valve of air-conditioning system can be regarded as defrosting valve, can control the velocity of medium into evaporator；Using bypass circulation
When defrosting, the valve on bypass circulation can see defrosting valve as, because can be by aperture to control velocity of medium.
Preferably, the frost core detection device includes ultrasonic detector, the ultrasonic detector is for detecting institute
State heat exchange pipe surface hair frost layer position and density.
Preferably, the frost core detection device further includes indoor unit, outdoor unit, four-way valve and compressor, the outdoor
Machine forms the evaporator, and the outdoor unit forms the evaporator, and one end of the defrosting valve is communicated with compressor, described to remove
The other end of white valve is communicated with the import of the heat exchanger tube of the evaporator.Communicating herein, is that fluid media (medium) can go directly,
Other components can be set in centre, and such as defrosting valve is communicated by four-way valve with compressor, and fluid media (medium) comes out from compressor
Defrosting valve is reached by four-way valve again.
Disclosed herein as well is a kind of air source heat pumps to position Defrost method, obtains the heat exchange pipe surface each position of evaporator
Frost density to determine frosting critical regions, import of the frosting critical regions apart from the heat exchanger tube is remoter, defrost valve
Aperture it is smaller.
Preferably, obtaining the frost density of the heat exchange pipe surface each position by ultrasonic detector.
Preferably, the maximum position of frost density is frosting critical regions.
Preferably, the aperture of the defrosting valve is arranged as follows:
1, when not needing defrosting, aperture 0；
2, import of the frosting critical regions apart from the heat exchanger tube is farthest, i.e., when the evaporation in heat exchanger tube exports；Aperture 30%；
3, when frosting critical regions are in the middle part of the medium process of the heat exchanger tube；Aperture 60%；
4, frosting critical regions are in the import of the heat exchanger tube；Aperture 100%.
Compared with prior art, beneficial effects of the present invention: position and density by determining heat exchange pipe surface frost layer, point
Frosting critical regions are precipitated, i.e., white core region, white core region farther out when, defrosting valve opening is smaller to which fluid flow rate is fast, preceding
The few heat that can be absorbed to white core region of section heat dissipation is more, white core region can be removed, so as to avoid remaining white core
Caused by frost layer rapid regeneration, save the energy.
Detailed description of the invention:
Fig. 1 is the operation schematic diagram that the application removes defrosting system；
Fig. 2 is the application defrosting control flow chart；
Marked in the figure: 110- evaporator, 111- heat exchanger tube, 112- defrosting valve, 120- four-way valve, 130- indoor unit, 140- throttling
Valve, 150- gas-liquid separator, 160- compressor.
Specific embodiment
Below with reference to test example and specific embodiment, the present invention is described in further detail.But this should not be understood
It is all that this is belonged to based on the technology that the content of present invention is realized for the scope of the above subject matter of the present invention is limited to the following embodiments
The range of invention.
A kind of positioning of air source heat pump removes defrosting system, including white core detection device, defrosting valve 112 and control device, white core
Detection device is used to detect the frost layer position on 111 surface of heat exchanger tube of evaporator 110 and density, control device are detected according to white core
The aperture of the testing result control defrosting valve 112 of device.
The valve 112 that defrosts is the valve that can control the flow velocity that high temperature refrigerant enters 110 heat exchanger tube 111 of evaporator,
When evaporator 110 is defrosted, for example, winter indoor unit 130 heats outdoor unit heat absorption, when needing to defrost to outdoor unit,
There are many modes, and when using recycled back, the throttle valve 140 of air-conditioning system can be regarded as defrosting valve 112, can control entrance
The velocity of medium of evaporator 110；When using bypass circulation to defrost, the valve on bypass circulation can see defrosting valve 112 as,
Because can be by aperture to control velocity of medium.Frost density is bigger, illustrates that frosting is more serious, finds out most serious by detection
Frosting position.
If the position is to adjust defrosting 112 aperture of valve to smaller, example apart from 111 entrance maximum distance of heat exchanger tube
Such as the 30% of standard-sized sheet, i.e., aperture is 30%, and the high-temperature refrigeration agent flux for entering heat exchanger tube 111 by hot-gas bypass pipe is constant, with
The defrosting opening of valve 112 becomes smaller, and flow velocity will increase compared to standard-sized sheet.High temperature refrigerant can reach heat exchanger tube 111 at faster speed
End, reduce the thermal loss in high temperature refrigerant in 111 leading portion flow process of heat exchanger tube, can be more targetedly
The region that heat has been sent to frosting most serious is defrosted；
If the maximum region of region frost density of frosting most serious be it is closer apart from 111 import of heat exchanger tube, i.e., control remove
White 112 aperture of valve is maximum, and valve becomes larger, and flow is constant, and flow velocity is necessarily slack-off, can need to stop the pipeline section to defrost in proximal end more
For a moment, the heat of high temperature refrigerant is largely absorbed by proximal end frost layer, to achieve the purpose that remove the serious area of frosting.Similarly, such as
Fruit is radiated, and 111 middle position frosting of heat exchanger tube is most thick, and defrosting 112 aperture of valve is then driveed as centre, i.e. aperture 60% or so.
White core detection device includes ultrasonic detector, and ultrasonic detector is used to detect the frost layer on 111 surface of heat exchanger tube
Position and frost density, for example, by setting ultrasonic wave transmitting and receiving device, reception device captures each by entire heat-generating pipe
The vibration displacement value of the ultrasonic wave of the frost layer of a position compares this group of data of vibration displacement value.Vibration displacement value is bigger, i.e., white
Layer density is bigger.
Referring to Fig.1, it further includes indoor unit 130, outdoor unit, four-way valve 120, gas-liquid point that air source heat pump positioning, which removes defrosting system,
From device 150 and compressor 160, indoor unit 130 is heated so that outdoor unit heat absorption is to form evaporator 110, and the one of defrosting valve 112
End is communicated by four-way valve 120 with compressor 160, so that high temperature refrigerant can pass through four-way valve after coming out from compressor 160
120 reach defrosting valve 112, and the other end of defrosting valve 112 is communicated with the import of outdoor unit heat exchanger tube 111, thus in defrosting, from
The high temperature refrigerant that four-way valve 120 comes out all passes through defrosting valve 112 and defrosts into evaporator 110, does not enter into interior
Machine 130 is heated.
When being defrosted using the positioning of above-mentioned air source heat pump except defrosting system, the specific method is as follows:
The heat exchanger tube 111 of evaporator 110 is divided into five sections according to the flow direction of fluid media (medium), is respectively by import to outlet
First segment, second segment, third section, the 4th section and the 5th section check 111 surface each position of heat exchanger tube by ultrasonic detector
Frost density, judges the frost density maximum of which position of 111 surface of heat exchanger tube to find out frosting region the most serious,
If frosting critical regions make its standard-sized sheet, i.e. aperture 100% in first segment, control device control defrosting valve 112；If knot
White critical regions are in second segment, then control device control defrosting valve 112 makes its aperture 80%；If frosting critical regions are
Three sections, then control device control defrosting valve 112 makes its aperture 60%；If frosting critical regions are at the 4th section, control device
Control defrosting valve 112 makes its aperture 50%；If frosting critical regions are at the 5th section, control device control defrosting valve 112 makes
Obtain its aperture 30%.
Claims (7)
1. a kind of air source heat pump positioning removes defrosting system, which is characterized in that including white core detection device, defrosting valve (112) and control
Device processed, the frost layer position on heat exchanger tube (111) surface of the frost core detection device for detecting evaporator (110) and frost layer are close
Degree, the control device controls the aperture of defrosting valve (112) according to the testing result of the white core detection device, described to remove
White valve (112) control enters the velocity of medium of the heat exchanger tube (111).
2. air source heat pump positioning according to claim 1 removes defrosting system, which is characterized in that the frost core detection device packet
Ultrasonic detector is included, the ultrasonic detector is for detecting the heat exchanger tube (111) surface hair frost layer position and density.
3. air source heat pump according to claim 1 positioning removes defrosting system, which is characterized in that further include indoor unit (130),
Outdoor unit, four-way valve (120) and compressor (160), the outdoor unit are formed the evaporator (110), the defrosting valve (112)
One end communicated with compressor (160), it is described defrosting valve (112) the other end and the evaporator (110) heat exchanger tube (111)
Import communicate.
4. a kind of air source heat pump positions Defrost method, which is characterized in that obtain heat exchanger tube (111) surface of evaporator (110)
The frost density of each position is to determine frosting critical regions, import of the frosting critical regions apart from the heat exchanger tube (111)
Remoter, the aperture of defrosting valve (112) is smaller.
5. air source heat pump according to claim 4 positions Defrost method, which is characterized in that obtained by ultrasonic detector
Take the frost density of the heat exchanger tube (111) surface each position.
6. air source heat pump according to claim 5 positions Defrost method, which is characterized in that the maximum position of frost density
For frosting critical regions.
7. air source heat pump according to claim 5 positions Defrost method, which is characterized in that defrosting valve (112)
Aperture is arranged as follows:
1, when not needing defrosting, aperture 0；
2, import of the frosting critical regions apart from the heat exchanger tube (111) is farthest, i.e. the evaporation in heat exchanger tube (111) exports
When；Aperture 30%；
3, when frosting critical regions are in the middle part of the medium process of the heat exchanger tube (111)；Aperture 60%；
4, frosting critical regions are in the import of the heat exchanger tube (111)；Aperture 100%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811615500.0A CN109442824B (en) | 2018-12-27 | 2018-12-27 | Positioning defrosting method and defrosting system for air source heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811615500.0A CN109442824B (en) | 2018-12-27 | 2018-12-27 | Positioning defrosting method and defrosting system for air source heat pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109442824A true CN109442824A (en) | 2019-03-08 |
| CN109442824B CN109442824B (en) | 2023-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811615500.0A Active CN109442824B (en) | 2018-12-27 | 2018-12-27 | Positioning defrosting method and defrosting system for air source heat pump |
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| CN (1) | CN109442824B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110849050A (en) * | 2019-11-19 | 2020-02-28 | 浙江工业大学 | Heat pump defrosting control device and control method by utilizing fan vibration and neural network |
| CN111692640A (en) * | 2019-03-13 | 2020-09-22 | 珠海格力电器股份有限公司 | Air conditioner indoor unit, air conditioner and defrosting control mode of air conditioner indoor unit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4833660A (en) * | 1986-10-15 | 1989-05-23 | Office National D'etudes Et De Recherches Aerospatiales | Device for detecting the presence of frost and/or for measuring the thickness of frost by ultrasound and frost probe usable in such a device |
| CN101994904A (en) * | 2010-08-13 | 2011-03-30 | 上海市特种设备监督检验技术研究院 | System and method for testing frosting property of empty bath type vaporizer |
| CN103940161A (en) * | 2014-05-16 | 2014-07-23 | 湖南创化低碳环保科技有限公司 | Method and device for defrosting through combination operation of multiple air heat source heat exchangers |
| WO2015122056A1 (en) * | 2014-02-13 | 2015-08-20 | 日立アプライアンス株式会社 | Air conditioning device |
| CN107655171A (en) * | 2017-10-10 | 2018-02-02 | 广东美的制冷设备有限公司 | The self cleaning method and air conditioner of heat exchanger of air conditioner |
-
2018
- 2018-12-27 CN CN201811615500.0A patent/CN109442824B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4833660A (en) * | 1986-10-15 | 1989-05-23 | Office National D'etudes Et De Recherches Aerospatiales | Device for detecting the presence of frost and/or for measuring the thickness of frost by ultrasound and frost probe usable in such a device |
| CN101994904A (en) * | 2010-08-13 | 2011-03-30 | 上海市特种设备监督检验技术研究院 | System and method for testing frosting property of empty bath type vaporizer |
| WO2015122056A1 (en) * | 2014-02-13 | 2015-08-20 | 日立アプライアンス株式会社 | Air conditioning device |
| CN103940161A (en) * | 2014-05-16 | 2014-07-23 | 湖南创化低碳环保科技有限公司 | Method and device for defrosting through combination operation of multiple air heat source heat exchangers |
| CN107655171A (en) * | 2017-10-10 | 2018-02-02 | 广东美的制冷设备有限公司 | The self cleaning method and air conditioner of heat exchanger of air conditioner |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111692640A (en) * | 2019-03-13 | 2020-09-22 | 珠海格力电器股份有限公司 | Air conditioner indoor unit, air conditioner and defrosting control mode of air conditioner indoor unit |
| CN110849050A (en) * | 2019-11-19 | 2020-02-28 | 浙江工业大学 | Heat pump defrosting control device and control method by utilizing fan vibration and neural network |
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| Publication number | Publication date |
|---|---|
| CN109442824B (en) | 2023-05-09 |
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