CN103712387B - Assisting defrosting structure, heat exchanger and heat pump system - Google Patents
Assisting defrosting structure, heat exchanger and heat pump system Download PDFInfo
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- CN103712387B CN103712387B CN201310733054.4A CN201310733054A CN103712387B CN 103712387 B CN103712387 B CN 103712387B CN 201310733054 A CN201310733054 A CN 201310733054A CN 103712387 B CN103712387 B CN 103712387B
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- heat exchanger
- defrosting structure
- assisting defrosting
- pump system
- heat pump
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Abstract
The invention discloses a kind of assisting defrosting structure, heat exchanger and heat pump systems.Specifically, assisting defrosting structure setting is in the bottom of heat exchanger, the liquid refrigerant not throttled is introduced into, the bottom of heat exchanger is made not freeze frost or the less frost of knot in assisting defrosting structure.
Description
Technical field
The present invention relates to Heating,Ventilating and Air Conditioning, automobile, refrigeration and transport field, more particularly, to micro-channel heat exchanger, flat
The row stream heat exchangers such as heat exchanger or heat pump.
Background technique
Air-conditioning heat exchanger is still based on finned brass heat exchanger currently on the market, but finned brass heat exchanger exist at
This height, the problems such as anti-galvano-cautery is poor, welding procedure is complicated.Micro-channel heat exchanger or parallel-flow heat exchanger are strengthened using flat tube to be passed
Thermal technology is a kind of full aluminium heater, has at low cost, and corrosion resistance is strong, and coolant injection amount is few, and flow path optimization is simple and weldering
The advantages that connecing simple process.
With reference to Fig. 1, when the heat exchanger is in heat pump system and in severe cold season operation, exchanger base to be (especially
It is at 10 bottom of flat tube and header) meeting slowly frosting, as shown in reference marker 12.Water 13, water are formed after the normal defrost of unit
In the case where failing to flow away in time and heat exchanger enters normal work, becomes ice after a period of time and is attached to exchanger base,
As shown in reference marker 14.If disposing these ice not in time, ice 12 can be accumulated gradually in bottom, and tie full entire heat exchange
Device causes air duct to block, and exchange capability of heat sharply declines.
In view of this, truly have needs provide a kind of novel defrosting structure that can at least be partially solved the above problem,
Heat exchanger and heat pump system.
Summary of the invention
The purpose of the present invention aims to solve the problem that at least one aspect of the above-mentioned problems in the prior art and defect.
At least one purpose of the invention is to provide a kind of assisting defrosting structure, solves worst cold case heat pump heat exchanger bottom
It freezes, reduce the problem of heat pump type air conditioner defrosting cycle.
It is of the invention another to be to provide a kind of heat exchanger and heat pump system using assisting defrosting structure.
According to an aspect of the invention, there is provided a kind of assisting defrosting structure for heat exchanger, the assisting defrosting
The liquid refrigerant not throttled is introduced the bottom for making heat exchanger in assisting defrosting structure in the bottom of heat exchanger by structure setting
Portion does not freeze frost or the less frost of knot.
Specifically, the assisting defrosting structure is configured to entirely or partly around the afflux positioned at exchanger base
Pipe.
Specifically, it is provided at least one conducting element on the outer surface of the assisting defrosting structure, each conducting element is from collection
Flow tube tilts down.
Specifically, the assisting defrosting structure is the cavity for entirely or partly surrounding the header.
Specifically, the cavity includes at least one separate space, and each of at least one described separate space passes through respective pipe
Road is connected with the pipeline for the refrigerant that supply does not throttle.
Specifically, the assisting defrosting structure is the coil pipe at least one turning.
Specifically, the coil pipe is the serpentine coil of the bottom setting of the more flat tubes in heat exchanger.
Specifically, the heat exchanger is the outdoor heat exchanger in heat pump system.
According to another aspect of the present invention, a kind of heat exchanger is provided, wherein the heat exchanger includes according to above-mentioned auxiliary
Help defrosting structure.
Specifically, the outlet for the liquid refrigerant of the assisting defrosting structure not throttled and at least one throttling set one
End connection, the refrigerant inlet when throttling set other end is used with the heat exchanger as evaporator are connect.
Also one side according to the present invention, provides a kind of heat pump system, the heat pump system includes:
At least one reversal valve is configured to make refrigerant in the flow path of closure when heat pump system runs heating mode
In flowed with first direction, and when heat pump system run refrigeration mode when make refrigerant in the flow path of closure with first party
It is flowed to opposite second direction；
Compressor；
Indoor heat exchanger is used as condenser when running heating mode, and is used as evaporator in operation refrigeration mode；
Outdoor heat exchanger is used as evaporator when running heating mode, and is used as condenser when running refrigeration mode,
Wherein the outdoor heat exchanger is according to above-mentioned heat exchanger；
At least one throttling set is arranged in the closure flow path between the indoor heat exchanger and outdoor heat exchanger；
Wherein in heating mode, the high temperature and high pressure gaseous refrigerant flowed out from compressor flows into indoor heat exchanger, later
Become the slightly lower liquid refrigerant of temperature；The liquid refrigerant flowed out from indoor heat exchanger is introduced into the assisting defrosting structure
Afterwards, throttling set is passed through, outdoor heat exchanger is then flowed into, frost or knot so that the bottom of outdoor heat exchanger does not freeze
Less frost.
Specifically, the pipe fitting or the throttling set for connecting throttling set are fixed on the outdoor heat exchanger.
Specifically, the throttling set is orifice fitting, capillary, heating power expansion valve or electric expansion valve.
Detailed description of the invention
These and or other aspects and advantage of the invention will become from description of preferred embodiments with reference to the accompanying drawing
It obtains obviously and is readily appreciated that, in which:
Fig. 1 is the principle effect diagram when exchanger base of the prior art freezes white；
Fig. 2 is the generalized schematic of the heat pump system according to the present invention including heat exchanger；
Principle effect diagram when Fig. 3 is the defrosting of the heat exchanger according to the present invention with assisting defrosting structure；
Fig. 4 a and 4b are the cross-sectional view and refrigerant of the assisting defrosting structure of first embodiment according to the present invention respectively
Flow distribution figure；
Fig. 5 a and 5b are the cross-sectional view and refrigerant of the assisting defrosting structure of second embodiment according to the present invention respectively
Flow distribution figure；
Fig. 6 is the perspective view of the assisting defrosting structure of third embodiment according to the present invention；With
Fig. 7 be include throttling set heat pump system according to the present invention self-contained schematic diagram.
Specific embodiment
2-7 below by way of examples and with reference to the accompanying drawings, the technical solutions of the present invention will be further described.?
In specification, the same or similar drawing reference numeral indicates the same or similar component.Following reference attached drawings are to embodiment party of the present invention
The explanation of formula is intended to explain present general inventive concept of the invention, and is not construed as to a kind of limitation of the invention.
As previously mentioned, exchanger base can slowly frosting in the case that heat exchanger is for worst cold case.Unit normalization
Water is formed after frost.Water fails to flow away in time and heat exchanger enters normal work, becomes ice after a period of time and is attached to heat exchanger bottom
Portion.If disposing these ice not in time, ice can gradually tie completely entire heat exchanger, and air duct is caused to block, exchange capability of heat sharply under
Drop.
In order to solve the heat exchanger or the icing of heat pump heat exchanger bottom under worst cold case in heat pump system, it is empty to reduce pump type heat
The problem of adjusting device defrosting cycle, the present invention is provided with assisting defrosting structure in heat pump heat exchanger bottom.Heat pump described herein changes
Hot device can be micro-channel heat exchanger or parallel-flow heat exchanger.It is all this field in view of micro-channel heat exchanger or parallel-flow heat exchanger
It is known, and this is no longer described their specific structure again.
Referring to fig. 2, the heat pump system using heat exchanger 20 according to the present invention is shown.The heat pump system includes: to set
Set at least one reversal valve (not shown), compressor 30, outdoor heat exchanger 20, at least one section in a closed flow path
Flow device 9 and indoor heat exchanger 40.Here, heat exchanger 20 is in heating mode in heat pump system is used as outdoor heat exchanger.
The reversal valve is configured to make refrigerant in the flow path of closure with first direction when operating in heating mode when heat pump system
(clockwise direction as indicated with 2) flowing, and make refrigerant in the stream of closure when heat pump system operates in refrigeration mode
It is flowed in road with the second direction (as shown in Figure 2 counter clockwise direction) opposite with first direction.Compressor 30 is configured to compress
Refrigerant.Indoor heat exchanger 40 operates in heating mode as condenser, and evaporator operation is used as in refrigeration mode.Room
External heat exchanger 20 is used as evaporator operation in heating mode, and operates in refrigeration mode as condenser.Outdoor heat exchanger
20 be the heat exchanger of the present invention with assisting defrosting structure.At least one throttling set 9 is arranged in the indoor heat exchange
In closure flow path between device 40 and outdoor heat exchanger 20, and it is configured to reduce the pressure of the refrigerant without changing refrigerant
Enthalpy.In heating mode, the high temperature and high pressure gaseous refrigerant flowed out from compressor 30 flows into indoor heat exchanger 40, Zhi Houbian
At the slightly lower liquid refrigerant of temperature；After introducing assisting defrosting structure 8 from the liquid refrigerant that indoor heat exchanger 40 flows out,
Pass through throttling set 9, be then flowed into outdoor heat exchanger 20 so that the bottom of outdoor heat exchanger 20 do not freeze frost or
Tie less frost.
As shown in figure 3, showing the work when heat exchanger according to the present invention with assisting defrosting structure 8 is defrosted
Schematic illustration.Specifically, (such as installing, bond or be brazed) is arranged in the bottom of heat exchanger 20 in assisting defrosting structure 8.It will
The higher liquid refrigerant of temperature and pressure from (interior) heat exchanger not throttled, which is introduced into assisting defrosting structure, to be made
Do not freeze frost or the less frost of knot of the bottom of heat exchanger (outdoor heat exchanger) (such as protects its surface temperature always
It holds more than zero degree).It does so, can prevent to form ice in exchanger base and reduces heat pump type air conditioner defrosting cycle.
Compared to Figure 1, made by the way that the higher liquid refrigerant of the temperature and pressure not throttled to be introduced into assisting defrosting structure 8
The bottom of heat exchanger 20 remains at zero degree or more, or does not freeze, though freeze be also it is minimal amount of, as shown in Figure 3.
First embodiment
The outdoor heat exchanger 20 with assisting defrosting structure 8 of first embodiment according to the present invention is shown in fig.4
Cross-sectional view.It illustrates a mutually matched flat tube 10, header 4, separate space 2 and 3 and the collection in outdoor heat exchanger 20
The cavity 1 of flow tube 4.In this example, separate space 2 and 3 and following conducting elements 12 (if necessary) are used as assisting defrosting knot
Structure 8 around the bottom of header 4, and partly surrounds header 4.Separate space 2 and 3 is abreast spaced apart, but in separate space 2 and 3
Outside be provided with conducting element 12.The conducting element 12 is arranged to tilt down from header 4.In other words, conducting element 12 is arranged
At the left and right directions relative to the page in Fig. 4 a downwards at 30 ° of angle of a predetermined angular, such as diagram.It is appreciated that
The conducting element 12 being arranged in this way can be convenient the water (water formed after defrosting) on the outer wall of flat tube 10 along the appearance of header 4
Surface current flows down and (is shown by the arrow in Fig. 4 a) through conducting element 12, and from conducting element 12.
In a further embodiment, assisting defrosting structure 8 can also be disposed partially to or fully around header 4
At least one cavity, and it is not limited to two cavitys 2 and 3 shown in Fig. 4 a.When assisting defrosting structure 8 is completely about header 4
When setting, such as it is arranged to circular ring shape, it may not be necessary to which above-mentioned conducting element 12 is set, this is because cuing open in this case
The two sides of assisting defrosting structure in view at circular ring shape are connected with flat tube 10, the two sides of assisting defrosting structure 8 it is arc-shaped
Outer surface will play the role of identical with above-mentioned conducting element 12.Certainly, those skilled in the art can set according to actual needs
Set the specific structure of assisting defrosting structure 8.
In fig.4, two separate spaces 2 and 3 are connected to for example, by the pipeline 5 of tee tube with cavity 1, naturally it is also possible to be selected
Other connection technologies known in the art.
Fig. 4 b shows the schematic diagram of the specific flow path according to the fluid in assisting defrosting structure.In view of this field
Technical staff illustrates only the portions of outdoor heat exchanger 20 it will be appreciated that in the case where design concept of the invention in fig. 4b
Part.Specifically, the liquid refrigerant that (such as from indoor heat exchanger 40) does not throttle is introduced by assisting defrosting by entrance 6
In structure 8, expansion valve 9 is flowed through later and is flowed into distribution pipe 11.It eventually flows in header 4, and refrigerant is assigned to phase
In the flat tube 10 answered.
Second embodiment
Referring specifically to Fig. 5 a and 5b, the second embodiment of the present invention and the first embodiment of the present invention are in structure setting and system
It is all substantially the same on refrigerant flow path, it is only difference is, the separate space 2 and 3 as assisting defrosting structure is arranged to
Shape substantially rectangular in section view shown in Fig. 5 a.Similarly, since separate space 2 and 3 does not surround header 4 completely, therefore it is preferred that
It is arranged in its two sides by conducting element 12.It is identical with the first embodiment in view of refrigerant flowpath therein, this will not be detailed here,
Referring specifically to Fig. 5 b.
3rd embodiment
Referring to Fig. 6, in the third embodiment of the present invention, 10 lower part of flat tube or bottom in outdoor heat exchanger 20 are set
Serpentine coil 18 be used as assisting defrosting structure 8.In this example, serpentine coil 18 at least has a turning, in Fig. 6
The serpentine coil 18 turned there are two having been shown in particular.In use, the liquid refrigerant not throttled enters from label 13
Into serpentine coil 18, flows through expansion valve 9 and enter heat pump heat exchanger 20 (when heat pump system is in heating mode as room
External heat exchanger) bottom header 4 in.Final refrigerant is assigned in corresponding flat tube 10 by header 4.It is preferred that
, serpentine coil 18 can be located at the windward side of outdoor heat exchanger 20.18 surface of serpentine coil is blowed air over, serpentine coil is reduced
The temperature of 18 inner refrigerants, and heat band in serpentine coil 18 is given into the surface that heat pump heat exchanger 20 contacts, to realize
The less purpose of frosting ice；Lower degree of supercooling is obtained after the refrigerant heat exchanger in serpentine coil 18 makes throttling with laggard
The refrigerant for entering heat exchanger 20 has higher heat absorption efficiency.
In Fig. 6, further it is shown that multiple fins 21 between two adjacent flat tubes 10.
In conclusion of the invention first can play solution to assisting defrosting structure 8 and 18 described in 3rd embodiment
The problem of certainly heat pump heat exchanger bottom freezes under worst cold case, reduces heat pump type air conditioner defrosting cycle.It is, of course, also possible to according to
It needs for the structure shown in above-mentioned first to 3rd embodiment to be combined, such as separate space 2 and 3 is set simultaneously on heat exchangers
And snakelike disk end 18.
Referring to Fig. 7, showing includes one of throttling set 9, assisting defrosting structure 8 or 18 and outdoor heat exchanger 20
The self-contained schematic diagram of system divided.Specifically, the pipe fitting 51 or the throttling set 9 for connecting throttling set 9 are fixed to the outdoor
On heat exchanger 20.Preferably, as shown, the pipe fitting 51, which passes through fixed device 52, is attached or secured to outdoor heat exchanger 20
On end plate 28.Connection or fixation in this way misplace after can preventing throttling set 9 from being influenced by external force, fall, pipe fitting leakage
Deng.
It is found that throttling set 9 can be orifice fitting, capillary, heating power expansion valve or electric expansion valve.Certainly, it throttles
Device 9 can also be other devices with the same function in this field.
In Fig. 7, from assisting defrosting structure 8 or 18 flow out refrigerant via relevant pipeline after throttling set 9,
The distribution pipe 11 being flowed into outdoor heat exchanger 20.
The above is only some embodiments of the present invention, it will be appreciated by the skilled addressee that sending out without departing substantially from this totality
In the case where the principle and spirit of bright design, these embodiments can be made a change, the scope of the present invention is with claim and it
Equivalent limit.
Claims (9)
1. a kind of assisting defrosting structure for heat exchanger, which is characterized in that
The assisting defrosting structure setting introduces assisting defrosting structure in the bottom of heat exchanger, by the liquid refrigerant not throttled
In the bottom of heat exchanger is not frozen frost or the less frost of knot,
Wherein the assisting defrosting structure is configured to entirely or partly around the cavity of the header positioned at exchanger base.
2. the assisting defrosting structure according to claim 1 for heat exchanger, which is characterized in that
At least one conducting element is provided on the outer surface of the assisting defrosting structure, each conducting element dips down from header
Tiltedly.
3. the assisting defrosting structure according to claim 1 for heat exchanger, which is characterized in that
The cavity includes at least one separate space, and each of at least one described separate space is not saved by respective pipeline and supply
The pipeline of the refrigerant of stream is connected.
4. the assisting defrosting structure according to any one of claim 1-3 for heat exchanger, which is characterized in that
The heat exchanger is the outdoor heat exchanger in heat pump system.
5. a kind of heat exchanger, which is characterized in that the heat exchanger include according to claim 1 auxiliary described in any one of -4 remove
White structure.
6. heat exchanger according to claim 5, which is characterized in that
The outlet for the liquid refrigerant of the assisting defrosting structure not throttled is connect at least one throttling set one end, described
Refrigerant inlet when the throttling set other end is used with the heat exchanger as evaporator is connect.
7. a kind of heat pump system, the heat pump system include:
At least one reversal valve, be configured to when heat pump system run heating mode when make refrigerant in the flow path of closure with
First direction flowing, and when heat pump system run refrigeration mode when make refrigerant in the flow path of closure with first direction phase
Anti- second direction flowing；
Compressor；
Indoor heat exchanger is used as condenser when running heating mode, and is used as evaporator in operation refrigeration mode；
Outdoor heat exchanger is used as evaporator when running heating mode, and is used as condenser when running refrigeration mode, wherein
The outdoor heat exchanger is the heat exchanger according to claim 5；
At least one throttling set is arranged in the closure flow path between the indoor heat exchanger and outdoor heat exchanger；
Wherein in heating mode, the high temperature and high pressure gaseous refrigerant flowed out from compressor flows into indoor heat exchanger, becomes later
The slightly lower liquid refrigerant of temperature；After the liquid refrigerant flowed out from indoor heat exchanger is introduced into the assisting defrosting structure,
Pass through throttling set, be then flowed into outdoor heat exchanger so that the bottom of outdoor heat exchanger do not freeze frost or knot compared with
Few frost.
8. heat pump system according to claim 7, which is characterized in that
The pipe fitting or the throttling set for connecting throttling set are fixed on the outdoor heat exchanger.
9. heat pump system according to claim 7 or 8, which is characterized in that
The throttling set is orifice fitting, capillary, heating power expansion valve or electric expansion valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310733054.4A CN103712387B (en) | 2013-12-26 | 2013-12-26 | Assisting defrosting structure, heat exchanger and heat pump system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310733054.4A CN103712387B (en) | 2013-12-26 | 2013-12-26 | Assisting defrosting structure, heat exchanger and heat pump system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103712387A CN103712387A (en) | 2014-04-09 |
| CN103712387B true CN103712387B (en) | 2019-08-30 |
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|---|---|---|---|
| CN201310733054.4A Expired - Fee Related CN103712387B (en) | 2013-12-26 | 2013-12-26 | Assisting defrosting structure, heat exchanger and heat pump system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1464963A (en) * | 2001-07-02 | 2003-12-31 | 三洋电机株式会社 | Heat pump |
| CN2886423Y (en) * | 2006-04-10 | 2007-04-04 | 广东美的电器股份有限公司 | Heat pump water heater |
| CN101126609A (en) * | 2006-08-14 | 2008-02-20 | 张吉礼 | Condensation tube drainage device |
| CN202902982U (en) * | 2012-10-15 | 2013-04-24 | 三花控股集团有限公司 | Heat exchanger and flow collecting pipe thereof |
-
2013
- 2013-12-26 CN CN201310733054.4A patent/CN103712387B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1464963A (en) * | 2001-07-02 | 2003-12-31 | 三洋电机株式会社 | Heat pump |
| CN2886423Y (en) * | 2006-04-10 | 2007-04-04 | 广东美的电器股份有限公司 | Heat pump water heater |
| CN101126609A (en) * | 2006-08-14 | 2008-02-20 | 张吉礼 | Condensation tube drainage device |
| CN202902982U (en) * | 2012-10-15 | 2013-04-24 | 三花控股集团有限公司 | Heat exchanger and flow collecting pipe thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103712387A (en) | 2014-04-09 |
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