CN203758342U - Cold head heat exchanger - Google Patents
Cold head heat exchanger Download PDFInfo
- Publication number
- CN203758342U CN203758342U CN201420093503.3U CN201420093503U CN203758342U CN 203758342 U CN203758342 U CN 203758342U CN 201420093503 U CN201420093503 U CN 201420093503U CN 203758342 U CN203758342 U CN 203758342U
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- China
- Prior art keywords
- heat exchanger
- cold
- cold head
- cold header
- header heat
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Abstract
The utility model provides a cold head heat exchanger. The cold head heat exchanger comprises a connecting body connected with a cold head and a plurality of heat exchanging slices connected to the connecting body. The cold head heat exchanger is characterized in that each heat exchanging slice comprises a copper slice connected to the connecting body, thick wire nets covering the two side faces of the copper slice respectively and a capillary wire net covering the outer sides of the thick wire nets, a condensate film is removed based on the capillary theory, and additional heating resistance caused by the condensate film is removed. The heat exchanging efficiency of the cold head heat exchanger can be greatly improved.
Description
Technical field
The utility model relates to a kind of small-sized used for cryogenic refrigerator cold header heat exchanger.
Background technology
Along with the development of biotechnology, new material, superconductor technology, space flight and aviation technology, the application of low-temperature refrigeration technology is also more and more extensive, and small-sized Cryo Refrigerator is widely used in above every field as a kind of refrigerating plant of compactness.Yet, use small-sized refrigerator to have three features as low temperature cold source itself: the one, refrigerating capacity is little, general several watts to tens watts; The 2nd, refrigerating efficiency is low, and the cost of obtaining each watt of cold is very high; The 3rd, refrigeration machine performance is affected obviously by operating temperature, with temperature, declines, and refrigerating capacity and refrigerating efficiency obviously fail.Therefore, effectively use small-sized refrigerator not only can save energy consumption, and can reduce refrigeration machine volume, extend the refrigeration machine life-span.
Connecting small-sized Cryo Refrigerator cold head is exactly effectively to use the critical component of small-sized Cryo Refrigerator with the cold header heat exchanger of the object that is cooled.Conventional cold header heat exchanger is red copper bar or oxygen-free copper copper rod at present.Be subject to the little restriction of refrigeration machine cold head diameter, the diameter of copper rod is also less.Cold header heat exchanger for refrigerating gas or liquid medium is generally many group copper sheets by copper rod cutting.
As the patent No.: disclosed a kind of small-sized helium liquefaction device in CN102997614A.The one-level of refrigeration machine, secondary cold head stretch in cooled cryostat, secondary cold head bottom is provided with the condenser that liquefies again, and the cold of refrigeration machine passes to by one-level, secondary cold head the condenser that liquefies again, and helium is condensed into drop at the condenser surface that liquefies again, splash in cooled cryostat, complete liquefaction.In liquefaction process, gas is met cold meeting and is formed one deck liquid film at condenser surface, and cryogenic fluid very easily evaporates, and in liquefaction, just has part working medium in evaporation.Working medium evaporative air upwards, is given the shearing force of liquid film to make progress, and stops liquid film dirty, makes liquid film more and more thicker.And gas can only be at the liquid film surface condensation of this bed thickness, the condensation latent heat of gas must just can pass to condenser wall by liquid film.The thermal conduction resistance of liquid is large, and under worst cold case, the thermal conduction resistance of liquid is larger.The thermal resistance only being produced by this layer of liquid film is exactly several times of this condenser copper sheet thermal conduction resistance, becomes topmost thermal resistance in whole diabatic process, and the existence of liquid film reduces heat transfer efficiency greatly, and result causes the loss of the cold that is of great rarity.
Summary of the invention
The utility model carries out in order to address the above problem, and object is to propose a kind of by utilizing capillary principle to remove the cold header heat exchanger of liquid film and then raising heat exchange efficiency.
The utility model to achieve these goals, has adopted following structure.
The utility model provides a kind of cold header heat exchanger being connected with refrigeration machine cold head, there is such feature: comprise the connector being connected with cold head, a plurality of heat exchanger fin that is connected in connector, wherein, each heat exchanger fin includes: be connected in the copper sheet of connector, be covered in respectively two sides of copper sheet crin net, be covered in the capillary silk screen in crin net outside.
In addition, in cold header heat exchanger provided by the utility model, can also there is such feature: wherein, the order number of crin net is greater than 200, and the order number of capillary silk screen is greater than 400.
In addition, in cold header heat exchanger provided by the utility model, can also there is such feature: wherein, crin netting gear has a plurality of vertical channels longitudinally, along the bottom of every vertical channel, a lateral channel is set.
In addition, in cold header heat exchanger provided by the utility model, can also there is such feature: wherein, lateral channel has certain gradient.
The effect of utility model and effect
According to cold header heat exchanger of the present utility model, because adopted in the two sides of copper sheet sintering crin net and capillary silk screen successively, when the moment when condensation working medium is condensed into drop on cold header heat exchanger surface, by capillary silk screen, adsorbed, eliminated the additional heat exchange thermal resistance of being brought by liquid film, so heat exchange efficiency of the present utility model is high.
Accompanying drawing explanation
Fig. 1 is the overall schematic of cold header heat exchanger in the present embodiment;
Fig. 2 is the structural representation of the heat exchanger fin of cold header heat exchanger in the present embodiment;
Fig. 3 is the drawing in side sectional elevation of the heat exchanger fin of cold header heat exchanger in the present embodiment; And
Fig. 4 be in the present embodiment cold header heat exchanger be used in combination schematic diagram.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is described further.
Fig. 1 is the overall schematic of cold header heat exchanger in the present embodiment.
As shown in Figure 1, cold header heat exchanger 50 comprises that the connector 20 being connected with refrigeration machine cold head, a plurality of interval are sintered in the heat exchanger fin 10 on connector 20.
Fig. 2 is the structural representation of the heat exchanger fin of cold header heat exchanger in the present embodiment.
As shown in Figure 2, heat exchanger fin 10 comprises: copper sheet 1, be sintered in copper sheet 1 two sides crin net 2, be sintered in the capillary silk screen 5 on crin net 2.
The order number of crin net 2 is greater than 200, and the order number of capillary silk screen 5 is greater than 400, and in the present embodiment, the order number of crin net is 250, and the order number of capillary silk screen 5 is 450.
As shown in Figure 2, on crin net 2, vertically cutting has some vertical channels 3 and a lateral channel 4 that is horizontally through all vertical channels 3.
Lateral channel 4 arranges certain gradient, reduces the resistance of liquid flow, is convenient to flowing of liquid.
The present embodiment utilizes capillary principle to remove liquid film, and the liquid film on capillary silk screen 5 exchange backings 10 adsorbs, and eliminates the additional heat exchange thermal resistance that liquid film brings.
Fig. 3 is the drawing in side sectional elevation of the heat exchanger fin of cold header heat exchanger in the present embodiment.
As shown in Figure 3, in order to demonstrate more clearly the structure of heat exchanger fin 10 in the present embodiment, the present embodiment has provided the drawing in side sectional elevation of heat exchanger fin 10, and Fig. 3 and Fig. 2 contrast, and at this, omits related description.
Fig. 4 be in the present embodiment cold header heat exchanger be used in combination schematic diagram.
As shown in Figure 4, cold header heat exchanger 50 is connected with cold head 51, and refrigeration machine 52 is passed to cold header heat exchanger 50 by cold head 51 by cold.Cold header heat exchanger 50 is positioned at fluid reservoir 54 inside, and fluid reservoir 54 stores by the liquid refrigerant of cold header heat exchanger 50 condensations.
Below in conjunction with Fig. 1 to Fig. 4, workflow of the present utility model is elaborated.
The cold of refrigeration machine 52 is passed to cold header heat exchanger 50 by cold head 51, treat that condensation working medium enters fluid reservoir 54 by air inlet pipe 53 and carries out heat exchange condensation with the cold header heat exchanger 50 that is positioned at fluid reservoir 54, when until condensation working medium when cold header heat exchanger 50 surface condensations form liquid pearl, moment is by capillary silk screen 5 absorption on cold header heat exchanger 50 surfaces.Liquid by 5 absorption of capillary silk screen enters the vertical channel 3 on cold header heat exchanger 50, along vertical poor road 3, flows down, and enters horizontal poor road 4, along under the slope current in horizontal poor road 4.
The effect of embodiment and effect
The cold header heat exchanger of the present embodiment is because adopted in the two sides of copper sheet sintering crin net and capillary silk screen successively, when the moment when condensation working medium is condensed into drop on cold header heat exchanger surface, by capillary silk screen, adsorbed, eliminated the additional heat exchange thermal resistance of being brought by liquid film, greatly improved the coefficient of heat transfer, so heat exchange efficiency of the present utility model is high.In addition, the cold header heat exchanger of the present embodiment arranges some vertical channels and a lateral channel that is horizontally through all vertical channels and has certain slope on the net because of having adopted at crin, so liquid resistance in flow process is less.
Claims (4)
1. the cold header heat exchanger being connected with cold head, comprising: the connector being connected with cold head, a plurality of heat exchanger fin being connected on described connector, is characterized in that:
Wherein, described in each, heat exchanger fin includes: be connected in the copper sheet of described connector, be covered in respectively the crin net of two sides of described copper sheet and the capillary silk screen that is covered in described crin net outside.
2. cold header heat exchanger according to claim 1, is characterized in that:
Wherein, the order number of described crin net is greater than 200, and the order number of described capillary silk screen is greater than 400.
3. cold header heat exchanger according to claim 1, is characterized in that:
Wherein, described crin netting gear has a plurality of vertical channels longitudinally, the lateral channel arranging along the bottom of every vertical channel.
4. cold header heat exchanger according to claim 3, is characterized in that:
Wherein, described lateral channel has certain gradient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420093503.3U CN203758342U (en) | 2014-03-03 | 2014-03-03 | Cold head heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420093503.3U CN203758342U (en) | 2014-03-03 | 2014-03-03 | Cold head heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203758342U true CN203758342U (en) | 2014-08-06 |
Family
ID=51253601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420093503.3U Expired - Fee Related CN203758342U (en) | 2014-03-03 | 2014-03-03 | Cold head heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203758342U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112539569A (en) * | 2019-09-21 | 2021-03-23 | 昆明物理研究所 | Cold head heat exchange device of low-temperature refrigerator |
-
2014
- 2014-03-03 CN CN201420093503.3U patent/CN203758342U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112539569A (en) * | 2019-09-21 | 2021-03-23 | 昆明物理研究所 | Cold head heat exchange device of low-temperature refrigerator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140806 Termination date: 20150303 |
|
| EXPY | Termination of patent right or utility model |