阅读说明：本技术 剖分分液头的封装方法、分液头改装方法及换热器 (Split liquid separation head packaging method, split liquid separation head refitting method and heat exchanger ) 是由 葛美才 王永生 曹美云 于 2018-09-06 设计创作，主要内容包括：本发明提供的一种剖分分液头的封装方法,所述分液头剖分后缝隙边缘的内壁上焊接有过滤网,包括以下步骤：选取所述分液头缝隙的若干位点进行预热,所述预热区域避开所述过滤网区域,且通过隔热透气材料覆盖于所述过滤网上以进行保护；当预热至预设条件下,采用焊接工艺在保护气氛下完成所述分液头的封装。本发明的封装方法操作简单,密封性好,装配的分液头满足高压强度下的使用要求。本发明的改装分液头的方法,能够充分利用现有分液头组件,实用性高,节约成本,实现增设分液头的过滤功能。采用本发明的方法得到的分液头制成的换热器具有过滤产生的杂质的功能,确保制冷效果,有效提升空调制冷系统的性能及可靠性,延长使用寿命。(The invention provides a packaging method for a split liquid separation head, wherein a filter screen is welded on the inner wall of the edge of a split gap of the split liquid separation head, and the packaging method comprises the following steps: selecting a plurality of sites of the liquid separation head gap for preheating, wherein the preheating area avoids the area of the filter screen and is covered on the filter screen through a heat-insulating and breathable material for protection; and when the liquid separation head is preheated to a preset condition, packaging the liquid separation head under a protective atmosphere by adopting a welding process. The packaging method is simple to operate and good in sealing performance, and the assembled liquid separation head meets the use requirement under high pressure strength. The method for modifying the liquid separation head can fully utilize the existing liquid separation head assembly, has high practicability, saves cost and realizes the filtering function of additionally arranging the liquid separation head. The heat exchanger manufactured by the liquid separation head obtained by the method has the function of filtering generated impurities, ensures the refrigeration effect, effectively improves the performance and reliability of an air-conditioning refrigeration system, and prolongs the service life.)

1. A packaging method for splitting a liquid separation head is characterized in that a filter screen is welded on the inner wall of the edge of a split gap of the liquid separation head, and the packaging method comprises the following steps:

selecting a plurality of sites of the liquid separation head gap for preheating, wherein the preheating area avoids the area of the filter screen and is covered on the filter screen through a heat-insulating and breathable material for protection;

and when the liquid separation head is preheated to a preset condition, packaging the liquid separation head under a protective atmosphere by adopting a welding process.

2. The method of claim 1, wherein: and a plurality of the sites are marked or fixed on the inner wall of the liquid separation head, and a plurality of the sites are positioned on the same cross section plane.

3. The method of claim 1, wherein: and a plurality of the sites and the fixed points of the filter screen and the inner wall of the liquid separation head are arranged in a staggered interval in a cross section plane.

4. The method of claim 3, wherein: the sites and the fixed points are arranged in a one-to-one staggered interval mode, or the sites and the fixed points are arranged in a one-to-many staggered interval mode.

5. The method of claim 1, wherein: the heat-insulating and air-permeable material comprises one or a combination of wet cloth and asbestos.

6. The method of claim 1, wherein: and igniting the welding gun through an igniter, melting the filler by the solder filled in the welding gun to each site of the gap of the liquid separation head, and infiltrating and saturating the solder in the gap until the solder is solidified.

7. The method of claim 6, wherein: and when the preheating area reaches 480 ℃, filling the gap of the liquid separation head, wherein the solder comprises silver-containing solder with the mass fraction of 5%.

8. The method of claim 6, wherein: the protective atmosphere is nitrogen flow, and the flow rate is 20L/min to 25L/min; the pressure of the protective atmosphere is between 0.05mpa and 0.1 mpa; the oxygen pressure used during the welding is 0.3 mpa.

9. A method of retrofitting a dispense head to provide said dispense head with a filtration function, comprising the steps of:

subdividing the liquid separation head to obtain a liquid separation end, a liquid inlet end and a plurality of middle sections, and fixing a filter screen on the inner wall of one or more of the liquid separation end, the liquid inlet end and the middle sections by adopting a welding process;

the liquid separation head is combined by adopting the packaging method for dividing the liquid separation head according to any one of claims 1 to 8.

10. A heat exchanger, characterized by: the liquid separation head obtained by the liquid separation head refitting method according to claim 9 is provided with a filter screen inside, and liquid separation holes in the liquid separation end of the liquid separation head are communicated with capillary tubes and used for conveying cooling media and heating media to realize heat exchange.

Technical Field

The invention relates to the technical field of air conditioners, in particular to a split liquid separation head packaging method, a split liquid separation head refitting method and a heat exchanger.

Background

This section is intended to provide a background or context to the embodiments of the invention that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.

The liquid separating device (also called a liquid separating head, a liquid separator, a flow divider or a flow dividing device) is arranged between a condenser and an evaporator of the air conditioning system and is used for uniformly converting the flow of two liquid and gaseous fluids into more than two paths of fluids to be completely evaporated in the evaporator. In practical application, the inner walls of the pipelines of the condenser and the evaporator can generate oxidation or other chemical reactions in the long-term use process, so that oxide scales or oxide particle layers or solid attachments caused by non-oxidation are formed on the surfaces of the inner walls, or the phenomena of peeling and the like are generated, the inner walls can flow to the liquid separating device along with the coolant under the action of scouring of the coolant or the self gravity, because the inlet caliber of the conventional liquid separating device is larger than the caliber of each outlet, the liquid separating device is easy to accumulate at the inlet and outlet pair connector, the blockage of the liquid separating device is caused, more serious liquid separating is uneven, the evaporator can be frosted by the excessive liquid separating pipelines of the coolant, the evaporation is incomplete, the liquid flows out of the evaporator, the heat transfer area of the evaporator cannot be fully utilized by the insufficient liquid separating pipelines of the coolant, the refrigerating capacity is reduced, the performance and the reliability of an air conditioning.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a method for encapsulating a split liquid separation head; another object of the present invention is to provide a liquid separation head retrofitting method; it is a further object of the present invention to provide a heat exchanger.

The technical scheme provided by the invention is as follows: a packaging method for splitting a liquid separation head is characterized in that a filter screen is welded on the inner wall of the edge of a split gap of the liquid separation head, and comprises the following steps:

selecting a plurality of sites of the liquid separation head gap for preheating, wherein the preheating area avoids the area of the filter screen and is covered on the filter screen through a heat-insulating and breathable material for protection;

and when the liquid separation head is preheated to a preset condition, packaging the liquid separation head under a protective atmosphere by adopting a welding process.

Furthermore, a plurality of the sites are marked or fixed on the inner wall of the liquid separation head, and a plurality of the sites are positioned on the same cross section plane.

Furthermore, a plurality of the sites and the fixed points of the filter screen and the inner wall of the liquid separation head are arranged in a staggered interval in a cross section plane.

Further, the sites and the fixed points are arranged in a one-to-one staggered interval mode, or the sites and the fixed points are arranged in a one-to-many staggered interval mode.

Further, the heat-insulating and air-permeable material comprises one or a combination of wet cloth and asbestos.

Further, the welding is performed by igniting the welding gun through an igniter, melting the filler material filled in the welding gun to each point of the gap of the liquid separation head, and infiltrating and saturating the filler material in the gap until the filler material is solidified.

Further, when the preheating area reaches 480 ℃, filling is carried out on the gap of the liquid separation head, and the solder comprises silver-containing solder with the mass fraction of 5%.

Further, the protective atmosphere is nitrogen flow, and the flow rate is 20L/min to 25L/min; the pressure of the protective atmosphere is between 0.05mpa and 0.1 mpa; the oxygen pressure used during the welding is 0.3 mpa.

The invention also provides a method for refitting the liquid separation head, so that the liquid separation head has a filtering function, comprising the following steps of:

subdividing the liquid separation head to obtain a liquid separation end, a liquid inlet end and a plurality of middle sections, and fixing a filter screen on the inner wall of one or more of the liquid separation end, the liquid inlet end and the middle sections by adopting a welding process;

and combining the liquid separation heads by adopting a split liquid separation head packaging method.

Wherein the content of the first and second substances,

the packaging method of the subdivision liquid separation head comprises the following steps:

selecting a plurality of sites of the liquid separation head gap for preheating, wherein the preheating area avoids the area of the filter screen and is covered on the filter screen through a heat-insulating and breathable material for protection;

and when the liquid separation head is preheated to a preset condition, packaging the liquid separation head under a protective atmosphere by adopting a welding process.

The invention further provides a heat exchanger which comprises the liquid separation head obtained by adopting the liquid separation head modification method, wherein a filter screen is arranged in the liquid separation head, and liquid separation holes at the liquid separation end of the liquid separation head are communicated with the capillary tube and used for conveying a refrigerant and a heating medium to realize heat exchange.

Wherein the content of the first and second substances,

the liquid separation head refitting method comprises the following steps:

subdividing the liquid separation head to obtain a liquid separation end, a liquid inlet end and a plurality of middle sections, and fixing a filter screen on the inner wall of one or more of the liquid separation end, the liquid inlet end and the middle sections by adopting a welding process;

and combining the liquid separation heads by adopting a split liquid separation head packaging method.

Wherein the content of the first and second substances,

the packaging method of the subdivision liquid separation head comprises the following steps:

selecting a plurality of sites of the liquid separation head gap for preheating, wherein the preheating area avoids the area of the filter screen and is covered on the filter screen through a heat-insulating and breathable material for protection;

and when the liquid separation head is preheated to a preset condition, packaging the liquid separation head under a protective atmosphere by adopting a welding process.

Compared with the prior art, the invention provides a method for packaging a split liquid separation head, wherein a filter screen is welded on the inner wall of the edge of a split gap of the split liquid separation head, and the method comprises the following steps: selecting a plurality of sites of the liquid separation head gap for preheating, wherein the preheating area avoids the area of the filter screen and is covered on the filter screen through a heat-insulating and breathable material for protection; and when the liquid separation head is preheated to a preset condition, packaging the liquid separation head under a protective atmosphere by adopting a welding process. The method provided by the invention is simple to operate, the sealing performance is good, and the assembled liquid separation head meets the use requirement under high pressure strength. The method for modifying the liquid separation head can fully utilize the existing liquid separation head assembly, has high practicability, saves cost and realizes the filtering function of additionally arranging the liquid separation head. The heat exchanger manufactured by the liquid separation head obtained by the method has the function of filtering generated impurities, ensures the refrigeration effect, effectively improves the performance and reliability of an air-conditioning refrigeration system, and prolongs the service life.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a flow chart of liquid dividing head modification according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a split liquid-separating head according to an embodiment of the present invention.

Fig. 3 is a diagram showing a positional relationship between a point on the dispensing end and a fixed point in fig. 2.

Description of reference numerals:

liquid separation head	100
		Liquid separating end	10
Liquid inlet end	20
		Gap	30
Liquid separation hole	41
		Filter screen	70
Fixing point	71
		Site of the body	80

The following detailed description further illustrates embodiments of the invention in conjunction with the above-described figures.

Detailed Description

So that the manner in which the above recited objects, features and advantages of embodiments of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. In addition, the features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth to provide a thorough understanding of embodiments of the invention, and the described embodiments are merely a subset of embodiments of the invention, rather than a complete embodiment. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort belong to the protection scope of the embodiments of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which embodiments of the present invention belong. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the invention.

Referring to fig. 1, 2 and 3, a method for modifying a dispensing head 100 to provide the dispensing head 100 with a filtering function (e.g., a filter screen 70 is disposed inside the dispensing head shown in fig. 2) includes the following steps:

step 1: splitting the liquid separation head 100 to obtain a liquid separation end 10, a liquid inlet end 20 and a plurality of middle sections, and fixing a filter screen 70 on the inner walls of one or more of the liquid separation end 10, the liquid inlet end 20 and the middle sections by adopting a welding process;

step 2: the liquid separation heads 100 are combined by a packaging method of splitting the liquid separation heads 100.

Wherein:

according to the packaging method of the split liquid separation head 100, the filter screen 70 is welded on the inner wall of the edge of the split gap 30 of the split liquid separation head 100, and the packaging method comprises the following steps:

101: selecting a plurality of sites 80 (shown in fig. 3) of the gap 30 of the liquid separation head 100 for preheating, wherein the preheating area avoids the area of the filter screen 70 and is covered on the filter screen 70 through a heat-insulating and breathable material for protection; in a particular embodiment of the method of the present invention,

a plurality of the sites 80 are marked or fixed on the inner wall of the liquid separation head 100, and a plurality of the sites 80 are positioned on the same cross section plane.

The plurality of the sites 80 and the fixed points 71 of the filter screen 70 and the inner wall of the liquid separation head 100 are arranged in a staggered interval in a cross section plane.

The sites 80 are staggered one-to-one from the anchor points 71 (as shown in fig. 3), or the sites 80 are staggered one-to-many from the anchor points 71.

The heat-insulating and air-permeable material comprises one or a combination of wet cloth and asbestos.

102: and when the liquid separation head is preheated to a preset condition, packaging the liquid separation head 100 under a protective atmosphere by adopting a welding process. In a particular embodiment of the method of the present invention,

the welding is carried out by igniting the welding gun through an igniter, melting the filler material filled in the welding gun to each point 80 of the gap 30 of the liquid separation head 100, and infiltrating and saturating the filler material in the gap 30 until the filler material is solidified.

And when the preheating area reaches 480 ℃, filling the gap 30 of the liquid separation head 100, wherein the solder comprises silver-containing solder with the mass fraction of 5%.

The protective atmosphere is nitrogen flow, and the flow rate is 20L/min to 25L/min; the pressure of the protective atmosphere is between 0.05mpa and 0.1 mpa; the oxygen pressure used during the welding is 0.3 mpa.