CN202224496U

CN202224496U - Heat exchanger forming device

Info

Publication number: CN202224496U
Application number: CN2011203823144U
Authority: CN
Inventors: 鲁益军
Original assignee: TCL Air Conditioner Wuhan Co Ltd
Current assignee: TCL Air Conditioner Wuhan Co Ltd
Priority date: 2011-09-29
Filing date: 2011-09-29
Publication date: 2012-05-23
Anticipated expiration: 2021-09-29

Abstract

The utility model discloses a heat exchanger forming device. The heat exchanger forming device comprises heat exchange pipes and fins sleeved on a plurality of heat exchange pipes; one end of each of the heat exchange pipe is sealed, and the other end is connected with a high-pressure gun; a sealing plug clamp is arranged at the joint of the heat exchange pipe and the high-pressure gun; and the high-pressure gun is connected with a pressure cylinder. During the pipe expanding process, the inner wall of a copper pipe is stressed uniformly and has low probability of breakage; high-pressure fluid is used for pipe expanding, so that internal threads cannot be damaged; and a pressure relief valve is provided additionally, so that the safety is improved, the operation is simpler, and the requirement to technical personnel is lower.

Description

A kind of heat exchanger shaped device

Technical field

The utility model relates to refrigeration technology field, more particularly, relates to the heat exchanger shaped device that a kind of expand tube does not damage the riffled tube profile of tooth.

Background technology

Along with raw material such as copper valency go up and national requirement to the air-conditioning efficiency; Just the direction of thin-walled develops copper pipe towards thin footpath; The copper pipe tubule is change directly, under the constant situation of heat exchanger appearance integral physical dimension, because distance shrinkage between the tube and tube; Make that fin efficiency improves, the heat transfer effective area increases, the flow resistance when air flows through reduces, the attenuation of copper pipe wall also can be conducted heat by efficient hardening in addition.But the too little meeting of caliber causes the refrigerant resistance to become big, and thin-walled can make the possibility of copper tube leakage in the work or explosion increase.

The most U-shaped copper pipes that adopt of existing heat exchanger are nested in the scheme in the aluminium fin, and cold-producing medium flows along copper pipe S shape.The fin of heat exchanger is processed by the fin punch press earlier, penetrates the U-shaped copper pipe then, with electric tube expander the copper pipe internal diameter is enlarged again, to guarantee that fin closely contacts with copper pipe, reaches the effect of effective heat transfer heat exchange.

Existing expansion tube method is for connecting the head that expands with a pull bar, and the pull bar diameter is less than copper pipe, and the head that expands is spherical, and diameter is a bit larger tham the copper pipe passage of aluminium fin.The technical staff goes into copper pipe with the pull bar screw plug that will expand, and the copper pipe internal diameter is enlarged, and the extruded aluminium fin makes copper pipe tightly contact to greatest extent with it, behind the expand tube of completion whole piece copper pipe, will expand with pull bar and to pull out.

For the female screwed pipe in the inside of copper pipe, the purpose of design is to be increase inner surface heat exchange area, and internal thread tends to because existing expansion tube method damages, and the internal thread of damage will hinder flowing of refrigerant.The riffled tube tooth depth is generally in 0.10～0.25mm scope at present.The riffled tube diapire is thick generally in 0.20～0.30mm scope, and the tall and thin tooth addendum angle of internal thread can reach about 20 °.Because the existence of internal thread, existing expansion tube process inevitably damage the profile of tooth of copper pipe, cause the heat exchanger exchange capability of heat poor.Thereby need improve existing expansion tube method.

The utility model content

The utility model purpose is in order to overcome the deficiency that above-mentioned prior art exists, and do not damage the heat exchanger shaped device of riffled tube profile of tooth when a kind of expand tube moulding is provided.

The technical scheme that the utility model adopts is: a kind of heat exchanger shaped device; Comprise heat exchanger tube and be set in the fin on many heat exchanger tubes; The one end sealing of said heat exchanger tube; The other end connects High Pressure Gun, is provided with the seal plug anchor clamps in the junction of heat exchanger tube and High Pressure Gun, and said High Pressure Gun connects pressure cylinder.

Said seal plug anchor clamps are provided with pressure-relief valve.

Said heat exchanger tube is a riffled tube.

Compared with prior art, the utlity model has following advantage:

1, in the expand tube process, the copper pipe inwall is stressed evenly, is difficult for breaking;

2, use the high-pressure fluid expand tube, can not damage internal thread.

3, add pressure-relief valve, security improved, operate simpler, littler to technical staff's requirement.

Description of drawings

Fig. 1 is the air-conditioner heat exchanger structure sketch map;

Fig. 2 is existing heat exchanger expansion tube process sketch map;

Fig. 3 is the heat exchanger shaped device structural representation of the utility model.

The parts that each label is represented in the accompanying drawing are following:

1 aluminium fin, 2 heat exchanger tubes, 3 pull bars, 4 bloated heads, 5 High Pressure Guns, 6 plug anchor clamps, 7 pressure-relief valves.

The specific embodiment

Below pass through the specific embodiment, and combine accompanying drawing that the utility model is described further.

As shown in Figure 1, in the heat exchanger, heat exchanger tube 2 is interspersed in the aluminium fin 1.For giving full play to exchange capability of heat, heat exchanger tube 2 must tightly contact with aluminium fin 1 through expansion tube method.

As shown in Figure 2, existing expansion tube method is: connect bloated 4 with a pull bar 3, pull bar 3 diameters are less than heat exchanger tube 2, and bloated 4 is spherical, and diameter is a bit larger tham the copper pipe passage of aluminium fin 1.To expand with

pull bar

3 and 4 to fill in heat exchanger tube 2, because the good ductility of copper product, heat exchanger tube 2 internal diameters enlarge, and extruded aluminium fin 1 makes heat exchanger tube 2 tightly contact to greatest extent with it, behind the expand tube of completion whole piece heat exchanger tube 2, will expand with

pull bar

3 and 4 to pull out.

As shown in Figure 3, a kind of heat exchanger shaped device of the utility model comprises aluminium fin 1, heat exchanger tube 2, High Pressure Gun 5, plug anchor clamps 6, pressure-relief valve 7.High Pressure Gun 5 is used to inject gases at high pressure or liquid, plug anchor clamps 6 be used for fixing and sealed high pressure rifle 5 and heat exchanger tube 2 between connection, pressure-relief valve 7 is arranged on the plug anchor clamps 6, is used to prevent that heat exchanger tube 2 internal pressures are too high.Heat exchanger tube 2 is riffled tubes.At first, High Pressure Gun 5 rifle heads are inserted heat exchanger tube 2 one ends, and the other end of sealing heat exchanger tube 2; Then, the junction with between plug anchor clamps 6 fixing also sealed high pressure rifles 5 and the heat exchanger tube 2 makes High Pressure Gun 5 and being connected of heat exchanger tube 2 be in a sealing state; Restart the power cylinder of High Pressure Gun, like cylinder or hydraulic cylinder, with liquid or gas (like empty G&W) high pressure pouring heat exchanger tube 2; Heat exchanger tube 2 expands greater than extraneous because of internal pressure; Tightly contact with aluminium fin 1, close High Pressure Gun 5 behind the completion expand tube, untie plug anchor clamps 6; Pressure in the venting heat exchanger tube 2 removes High Pressure Gun 5 and plug anchor clamps 6.In filling process, when heat exchanger tube 2 internal pressures exceeded expansion tube process requirement setting value, pressure-relief valve 7 was opened release.

Heat exchanger tube 2 is provided with internal thread, and complete internal thread helps refrigerant flowing in heat exchanger tube 2, and existing expansion tube method contacts with the direct physical of heat exchanger tube 2 internal threads owing to bloated 4, and internal thread usually damages, and hinders flowing of refrigerant on the contrary.In addition, existing expansion tube method, the possibility that heat exchanger tube 2 breaks is bigger.

And a kind of expansion tube method of the utility model utilizes the method for fluid pressure to carry out expand tube, and heat exchanger tube 2 inwalls stressed evenly being difficult for breaks, and can't damage internal thread.Concrete expansion tube process is following:

A) many heat exchanger tubes are bent to U-shaped;

B) heat exchanger tube cleaning and removing greasy dirt;

C) after pressing spacer sleeve string multi-disc fin on the heat exchanger tube; Many heat exchanger tubes are welded to connect to forming the heat exchanger base substrate of path.

D) heat exchanger tube places on the expand tube platform, heat exchanger tube one end sealing, and the other end connects behind the High Pressure Gun with the shutoff of seal plug anchor clamps, on the seal plug anchor clamps, connects pressure-relief valve, and the heat exchanger tube internal pressure is remained in the safety value scope.

E) just fill high-pressure fluid in the base to heat exchanger, pressurize 6-15min makes the heat exchanger tube bulging, combines closely with the pore on the fin.

In order to raise the efficiency, when expand tube, the expand tube platform can be heated to the gas that charges in the heat exchanger, makes fluid expansion faster.

Claims

1. heat exchanger shaped device; Comprise heat exchanger tube and be set in the fin on many heat exchanger tubes, it is characterized in that: the end sealing of said heat exchanger tube, the other end connects High Pressure Gun; Be provided with the seal plug anchor clamps in the junction of heat exchanger tube and High Pressure Gun, said High Pressure Gun connects pressure cylinder.

2. heat exchanger shaped device according to claim 1 is characterized in that: said seal plug anchor clamps are provided with pressure-relief valve.

3. heat exchanger shaped device according to claim 1 and 2 is characterized in that: said heat exchanger tube is a riffled tube.