Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
  • F25B39/00—Evaporators; Condensers
  • F25B39/02—Evaporators
  • F25B39/022—Evaporators with plate-like or laminated elements
  • F25B39/024—Evaporators with plate-like or laminated elements with elements constructed in the shape of a hollow panel
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
  • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
  • F25B2339/00—Details of evaporators; Details of condensers
  • F25B2339/02—Details of evaporators
  • F25B2339/023—Evaporators consisting of one or several sheets on one face of which is fixed a refrigerant carrying coil

Definitions

• the invention relates to an evaporator which encloses a cooling chamber of a compressor cooling device operated with hydrocarbons as the coolant and is surrounded on the outside by a heat insulating layer and between two metal sheets of the evaporator wall, an inner and an outer metal sheet, one meandering extending coolant channel with a coolant inlet and a coolant outlet, wherein the two metal sheets next to and between coolant channel sections have a solid metallic connection to one another in the form of a weld or soldering.
• evaporators are regularly formed from corresponding flat evaporator boards which, when formed, frequently form the rear wall of at least the four walls of a cold store, for example a freezer compartment.
• Such evaporator boards and their manufacture by the so-called roll bond process are shown in DE-PS 15 52 044 as an example.
• separating layers made of sweat-preventing material ensure that the later course of the coolant channel forms exactly delimited surfaces. This measure is described for example in DE-PS 19 20 424.
• the object of the invention is to design the generic evaporator in such a way that the risk of coolant leakage is reduced without any appreciable loss in the cooling capacity of the evaporator.
• an additional inner wall plate which forms the inner wall of the evaporator wall of the cooling chamber, is provided on the cooling chamber side, has the metallic surface contact with the inner metal plate, and that connection surfaces welding technology within the surface contact area between the inner wall plate and the inner metal plate shear or soldering type exist.
• a first embodiment provides that the connecting surfaces between the inner wall plate and the inner metal plate are limited to strip-like or island-shaped surface cutouts which are distributed over the evaporator wall.
• connection surfaces A great certainty in the delimitation of the connection surfaces is achieved by the fact that thin separating layers exist between adjacent connection surfaces between the inner wall plate and the inner metal plate.
• separating layers advantageously have a meandering course adapted to the meandering course of the coolant channel, but should be wider than the coolant channel at the assigned point.
• Further refinements of the invention also provide additional security on the outside in that an additional outer wall plate, which forms the outer wall of the evaporator wall, is provided on the insulating layer side, has metallic surface contact with the outer metal plate and that within the surface contact area between the outer wall plate and the outer metal sheet connection surfaces of welding or soldering type exist.
• the outer connecting surfaces between the outer wall plate and the outer metal plate are limited to strip or island-shaped surface cutouts which are distributed over the evaporator wall.
• Corresponding thin outer separating layers can also be provided between the outer wall plate and the outer metal plate.
• the outer separating layers advantageously have a meandering course adapted to the meandering course of the coolant channel and are each wider than the coolant channel.
• the object is achieved in a simple manner by the invention.
• the invention requires the use of further sheets for the inner wall sheet and possibly the outer wall sheet no additional manufacturing outlay, since, for example, the welding of the three or four layers can be carried out in one go using the roll bond method and with existing equipment.
• FIG. 1 shows an evaporator of a compressor cooling device.
• FIG. 2 shows a section of an evaporator wall in section.
• FIG. 3 shows a plan view of an evaporator wall.
• FIG. 4 shows a section of an evaporator wall in a perspective view
• Fig. 1 shows an evaporator 1 with the four evaporator walls 2, which are formed from a correspondingly large evaporator plate by bending the same.
• the outside of the evaporator is surrounded by a heat insulation layer 3, which is only drawn in sections.
• the cooling space 4 is regularly delimited at the rear by a rear wall, not specified.
• the evaporator wall 2 is shown partially cut away, the structure of which can be seen more clearly in FIG. 2. It consists of an inner metal sheet 5 and an outer metal sheet 6 and an inner wall sheet 7. Between the inner metal sheet 5 and the outer metal sheet 6 there is the coolant channel 8.
• the coolant channel 8 has, as shown in FIG. 1 , a coolant inlet 9 and a coolant outlet 10.
• the inner metal sheet 5 with the outer metal sheet 6 on both sides of the coolant channel 8 has a solid metallic connection 11, here in the form of a weld. For the sake of clarity, this is disproportionate highlighted. In the coolant channel itself, the release agent layer 12 is also shown disproportionately, which made it possible to inflate the coolant channel 8.
• connecting surfaces 13, 13a of a welding type.
• a thin separating layer 14 is provided between the connecting surfaces 13 and 13a.
• FIG. 3 shows an evaporator wall 2 in the wall structure according to FIG. 2 without an insulating layer, seen from the outside.
• the coolant channel 8 is branched many times in accordance with the dash-dotted lines.
• a pair of dashed lines surrounds the separating layer 14, which runs in a meandering manner. It can be seen that the separating layer 14 is in each case wider than the coolant channel 8.
• FIG. 4 shows a perspective illustration and a detail of a partition 2, which consists of the inner wall plate 7, the inner metal plate 5, the outer metal plate 6 and the outer wall plate 15.
• the inner wall plate 7 and the outer wall plate 15 could consist of aluminum (AI 99.5) and each be approximately 0.6 mm thick.
• the inner wall plate 5 is made of zirconium-containing aluminum (AlZr 0.2) and 0.6 mm thick, the 0.5 mm thick outer wall plate 6 is in turn aluminum (AI 99.5).

Landscapes

• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Mechanical Engineering (AREA)
• Thermal Sciences (AREA)
• General Engineering & Computer Science (AREA)
• Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
• Devices That Are Associated With Refrigeration Equipment (AREA)
• Iron Core Of Rotating Electric Machines (AREA)
• Air-Conditioning For Vehicles (AREA)

Priority Applications (8)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6502585

Family Applications (1)

Country Status (14)

Cited By (1)

Families Citing this family (1)

Citations (11)

• 1993
  • 1993-11-15 DE DE4338895A patent/DE4338895A1/de not_active Withdrawn
• 1994
  • 1994-03-31 DE DE9405447U patent/DE9405447U1/de not_active Expired - Lifetime
  • 1994-10-25 CN CN94194514A patent/CN1145663A/zh not_active Withdrawn
  • 1994-10-25 AU AU80601/94A patent/AU8060194A/en not_active Abandoned
  • 1994-10-25 BR BR9408060A patent/BR9408060A/pt not_active Application Discontinuation
  • 1994-10-25 EP EP94931549A patent/EP0728282A1/de not_active Ceased
  • 1994-10-25 CZ CZ961433A patent/CZ143396A3/cs unknown
  • 1994-10-25 CA CA002176705A patent/CA2176705A1/en not_active Abandoned
  • 1994-10-25 PL PL94314489A patent/PL314489A1/xx unknown
  • 1994-10-25 KR KR1019960702575A patent/KR960706055A/ko not_active Application Discontinuation
  • 1994-10-25 WO PCT/EP1994/003503 patent/WO1995014197A1/de not_active Application Discontinuation
  • 1994-10-25 SK SK652-96A patent/SK65296A3/sk unknown
  • 1994-10-25 JP JP7514177A patent/JP2689996B2/ja not_active Expired - Lifetime
• 1996
  • 1996-05-14 BG BG100591A patent/BG100591A/xx unknown
  • 1996-07-29 FI FI963007A patent/FI963007A0/fi not_active Application Discontinuation

Patent Citations (11)

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