CN1145663A

CN1145663A - Evaporator

Info

Publication number: CN1145663A
Application number: CN94194514A
Authority: CN
Inventors: 布鲁诺·罗巴斯齐艾韦茨; 约翰内斯·雷默斯; 迪特尔·比特; 赫伯特·施滕贝尔; 格尔德·福尔默
Original assignee: Krupp VDM GmbH
Current assignee: Krupp VDM GmbH
Priority date: 1993-11-15
Filing date: 1994-10-25
Publication date: 1997-03-19
Also published as: CA2176705A1; FI963007A; EP0728282A1; BG100591A; KR960706055A; CZ143396A3; BR9408060A; JP2689996B2; SK65296A3; AU8060194A; JPH09504360A; FI963007A0; DE4338895A1; DE9405447U1; PL314489A1; WO1995014197A1

Abstract

Described is an evaporator for a compressor-type refrigeration unit, the wall of the evaporator comprising an inner and outer metal sheet (5 and 6) enclosing a meander-shaped refrigerant duct (8). The evaporator is particularly protected against refrigerant leaks by an additionaly inner-wall sheet (7) and optionally an additional outer-wall sheet (15). All the elements of the evaporator wall, i.e. the inner wall sheet (7), the inner metal sheet (5), the outer metal sheet (6) and the optional outer wall sheet (15), are welded or soldered to each other.

Description

Evaporimeter

The present invention relates to a kind of evaporimeter, it has a cooling chamber that adopts the compression cooler that hydrocarbon cools off as cooling agent, outer bread one deck thermal insulation layer of cooling chamber, between two metallic plates of evaporator shell, be that a coolant channel that has the meander shape of a coolant entrance and a coolant outlet is arranged between inboard metallic plate and the outside metallic plate, near this coolant channel section and between two metallic plates be to form a fixing metal with the welding or the mode of soldering to connect mutually.

In order to form a cooling chamber, adopt the evaporimeter sheet material of suitable smooth four walls that will form the cooling chamber housing at least in accordance with regulations, for example a reach in freezer also forms rear wall usually.This evaporimeter sheet material and all in DE-PS1552044, illustrate according to the production that is called as roller weldering (Rollbond) method.When employing connect the roller weldering method that interconnect with the bottom extended state by the hot-rolling pressure welding with two-ply, the separating layer by the sheet material part of not welding for coolant channel meander trend is afterwards constituted had formed interface accurately.This method illustrates in DE-PS1920424.

Past only adopts hydrocarbon (FCKW) as cooling agent, in new cooling system, then adopt the hydrocarbon that resembles iso-butane, isopropyl alcohol or propane one butane and so on, these hydrocarbons and the air formation deflagrating mixture that is mixed, so that make in cooling chamber, increasing of present defence be equipped with explosion-proof electric device, in addition, also require the additional measure that prevents that cooling agent from leaking, particularly lead to the leakage of cooling chamber.

The objective of the invention is, under the situation of the cooling effectiveness of not serious loss evaporimeter, design prevents the evaporimeter of this structure of cooling agent spillage risk.

Therefore add by invention suggestion cooling chamber and be equipped with an inside panel, it constitutes the inwall of cooling chamber housing, and have a metal covering to contact with inboard metallic plate, within the contact range between inside panel and the inboard metallic plate, adopt welding procedure or soldering processes to constitute the bonding pad.

Structure according to obtaining inventing by dependent claims can be equipped with one first structure like this, and promptly the joint face between inside panel and inboard metallic plate is only limited to strip or the island section that is distributed on the evaporator wall.

Some thin separating layers by between inside panel between the adjacent bonding pad and inboard metallic plate can make the location of bonding pad spaced more guaranteed.

The aspect that these separating layers are favourable is that it has the meander shape that the meander shape of and coolant channel matches, and its width is wideer than coolant channel at the place that matches.

The other structure of this invention has also externally increased insurance, promptly by exterior panel of the additional again outfit in thermal insulation layer outside, this exterior panel becomes the outer wall of evaporator shell, and with outside metallic plate is to adopt metal covering to contact, in addition, adopt welding to be connected in the contact area scope between exterior panel and outside metallic plate with method for welding.

Be similar to inner security, stipulated that at this outside bonding pad between exterior panel and the outside metallic plate is only limited to the section of strip or island, and cross and be distributed in the evaporator wall.In addition, also can be between exterior panel and the outside metallic plate separating layer of some thin outsides of relative set, the advantage of the separating layer that these are outside is, the meander shape that it has the meander shape of and coolant channel to match, and wideer at its width of part that matches than coolant channel.

For the evaporimeter that the method for a coolant channel that connects by the fixing metal that adopts the hot-rolling pressure welding to fetch to carry out between inboard metallic plate and the outside metallic plate by roller weldering method and convexed to form by welding region not before the evaporimeter moulding is made, the bonding pad between bonding pad between its inside panel and the inboard metallic plate or exterior panel and the outside metallic plate connects inboard and outside metallic plate with the hot-rolling pressure welding and makes under a passage.

Realized the purpose that is proposed by the present invention with simple method.Be used for needed other sheet material of exterior panel for being used under inside panel and the possible situation, the present invention does not require the expense in the additional processing, because for example, finish by three layers of roller weldering method welding or four layers of all available existing equipment under a passage (zug).

The present invention will be described according to the embodiment shown in the accompanying drawing below, illustrates in the diagram:

An evaporimeter schematic diagram of Fig. 1 compression cooler

The part sectioned view of an evaporator wall of Fig. 2

The vertical view of an evaporator wall of Fig. 3

The profile perspective of an evaporator wall of Fig. 4

Fig. 1 illustrates one and has the evaporimeter 1 that is converted into four walls 2 of identical size by the sheet material of a suitable size, and one deck thermal insulation layer 3 is enclosed in its outside, and partial sectional view only is shown among the figure.Seal with a base plate that does not elaborate routinely the back of cooling chamber 4.

Part illustrates the section of evaporator wall, and its structure is clearly shown that in Fig. 2 more.It is made up of an inboard metallic plate 5 and one outside metallic plate 6 and an inside panel 7.A coolant channel 8 is arranged between inboard metallic plate 5 and outside metallic plate 6, and as shown in Figure 1, coolant channel 8 has a coolant entrance 9 and a coolant outlet 10.

In addition, Fig. 2 illustrates forming a fixing metal in this mode with welding and being connected 11 of the inboard metallic plate 5 at coolant channel 8 two ends and outside metallic plate 6, and it amplifies in the drawings makes it clear, and the separating layer 12 same amplifications in coolant channel illustrate.Separating layer can be ventilated to coolant channel 8.

The bonding pad 13 that forms with welding method shown in amplifying is arranged between inboard metallic plate 5 and inside panel 7, and 13a in the bonding pad 13, also has a very thin separating layer 14 between the 13a.

Fig. 3 illustrates a structure of seeing from the outside by Fig. 2 evaporator wall 2, and it does not have thermal insulation layer.Being essentially circle in coolant channel 8 the solid line boundary line part that marks and the meander zone of spreading at of a meander shape is connected 11 with oval fixing metal and equally protrudes.Spread in the zone at this, coolant channel 8 is divided into and the corresponding a plurality of zones of chain-dotted line.

A pair of dotted line surrounds the separating layer 14 of pairing meander shape, and hence one can see that, and each cooperation place separating layer 14 is always wideer than coolant channel 8.

Fig. 4 illustrates a wall that separates 2 with perspective view and cutaway view, and it is by inside panel 7, inboard metallic plate 5, and outside metallic plate 6 and exterior panel 15 are formed.

For such evaporator shell 2, inside panel 7 and exterior panel 15 all are to make with aluminium (AL99.5), each thickness 0.6MM.

Inboard metallic plate 5 is made thick 0.6MM by zirconium alloy (ALZr0.2).In addition, the outside metallic plate 6 (AL99.5) made of aluminum of thick 0.5MM.

Claims

1. evaporimeter, it has one is the cooling chamber of the compression cooler that cools off of cooling agent with the hydrocarbon.Its outer bread one deck thermal insulation layer, between two metallic plates of evaporator wall, promptly between an inboard metallic plate and the outside metallic plate coolant channel that has the meander shape of a coolant entrance and a coolant outlet is arranged, for this evaporimeter, there is a mode to interfix being connected of metal with near two metallic plates between the coolant channel section with welding or soldering, it is characterized in that, cooling chamber is furnished with an additional inside panel (7), it becomes the inwall of cooling chamber (4) housing, and forming metal covering with inboard metallic plate (5) contacts, in addition, in the contact area scope between inside panel (7) and the inboard metallic plate (5) be the bonding pad (13) that forms with the welding or the method for soldering.

2. by the described evaporimeter of claim 1, it is characterized in that the bonding pad (13) between inside panel (7) and inboard metallic plate (5) is only limited to the section that has strip or island in the wall that is distributed in evaporimeter.

3. by the described evaporimeter of claim 2, it is characterized in that, adjacent bonding pad (13,13a) between thin between inside panel (7) and inboard metallic plate (5) separating layer (14) is arranged.

4. by the described evaporimeter of claim 3, it is characterized in that, the meander shape that described these separating layers (14) have the meander shape of and coolant channel to match, but its width of each cooperation place is all wideer than coolant channel.

5. by any one the described evaporimeter in the claim 1 to 4, it is characterized in that, at the additional again exterior panel (15) of thermal insulation layer side, it becomes the outer wall of evaporator wall (2), with outside metallic plate (6) is that metal covering contacts, and is the join domain (17) that welding or soldering form in the contact zone scope between exterior panel (15) and outside metallic plate (6).

6. by the described evaporimeter of claim 5, it is characterized in that the outside bonding pad (17) between exterior panel (15) and outside metallic plate (6) is only limited to the strip that is distributed in the evaporator wall (2) or the section of island.

7. by the described evaporimeter of claim 6, it is characterized in that thin external discrete layer (16) is arranged between the bonding pad of adjacent outside (17) between exterior panel (15) and outside metallic plate (6).

8. by the described evaporimeter of claim 7, it is characterized in that outside separating layer (16) has the meander shape that the meander shape of and coolant channel (8) matches, but its width is wideer than coolant channel (8) in the cooperation place.

9. by any one the described evaporimeter in the claim 1 to 8, its inboard metallic plate and the connection of the fixing metal between the metallic plate of the outside are to connect formation by the hot-rolling pressure welding by the roll extrusion bonding method, its coolant channel general before the evaporimeter processing and forming do not heave and form in the weld zone, it is characterized in that, bonding pad between inside panel (7) and the inboard metallic plate (5) (13,13a) under a passage, adopt the hot-rolling pressure welding to connect medial and lateral metallic plate (5 or 6) and make.

10. by the described evaporimeter of claim 9, it is characterized in that, the bonding pad between exterior panel (15) and outside metallic plate (6) (13,13a) under a passage, adopt the hot-rolling pressure welding connect in outside metallic plate (5 or 6) make.