fig1 shows a unit composed of or comprising three shelving modules 1 , 2 , 3 combined into a cooling unit system . the cooling unit system encloses a frontally accessible cooling chamber 4 at the back , from above and below , and at least when in use , also from the side , for which purpose the two corresponding side walls are mounted on both sides of the system . the front side can be open and freely accessible or for special applications , can be provided with door elements . when in use , shelves are mounted in the cooling chamber 4 , onto which the chilled goods , such as meats , dairy products , or the like , are placed in a sales room . a single shelving module 1 , 2 , 3 can be used as a cooling unit . side walls can be mounted on both sides and the front side can be open or can be closed by at least one door element . to keep the cooling chamber 4 cold , components of a cooling device 5 are integrated into the cooling unit system ( see fig2 ), in particular an evaporator 50 , 50 ′, 50 ″, a compressor 51 , a condenser 52 , an expansion valve device , connectors 53 including connecting lines 53 . 1 , and a control unit 55 . 1 of a control system 55 ( see fig8 ), as well as fans 56 , 57 for producing or assisting required air flows ( see fig3 ). the condenser 52 can be connected by corresponding connecting lines 53 . 1 via a secondary circuit to a heat exchanger 54 , such as located in another space . if necessary , it is also possible , for example , for a larger cooling unit system to include a plurality of such components of the cooling device 5 . in one version of the exemplary embodiment shown , the condenser 52 with corresponding connectors 53 is situated or positioned in or on an upper group 13 in an upper cooling component recess 13 . 30 situated there in the region of an upper cover 13 . 3 so that it is easily accessible from above or behind , while the compressor si is preferably situated in the lower region of a rear wall group 12 , behind an inner cover 12 . 1 that delimits the cooling chamber 4 at the back , in a receiving space ( not shown in detail ) of a receiving device . in the middle region of the rear wall group 12 , the evaporator 50 , 50 ′, 50 ″ is likewise situated behind the inner cover 12 . 1 and is mounted with the receiving device . as clear from fig1 , the evaporator 50 ″ extends continuously across all three shelving modules 1 , 2 , 3 , while the compressor 51 and condenser 52 for all three shelving modules 1 , 2 , 3 of the cooling unit system are jointly situated in only one shelving module 1 , in the exemplary embodiment according to fig1 in the one on the right , and are connected to the evaporator 50 ″ via corresponding connecting lines with the interconnection of relevant intermediate elements of the cooling device 5 such as expansion valves or restrictors . aside from the upper group 13 and rear wall group 12 mentioned above , each shelving module 1 , 2 , 3 also has a base group 11 . with a floor cover 11 . 1 situated on top , it delimits the bottom of the cooling chamber 4 and at its front , has a covering grating 11 . 10 , which is provided with air passage holes , in particular air passage slots , and a front cover 11 . 4 with a protective or decorative molding in the front edge region . essential components of each shelving module 1 , 2 , 3 are the side frames 10 situated on each side , which have a c - shaped form when viewed from the side , with a vertical profile 10 . 1 along the back side , a lower horizontal profile 10 . 2 connected to and extending forward from the bottom of the vertical profile , and an upper horizontal profile 10 . 3 connected to and extending forward from the upper end section of the vertical profile 10 . 1 . in the depiction shown , the lower horizontal profile 10 . 2 extends farther forward than the upper horizontal profile 10 . 3 . further testing , however , has shown that an upper profile 10 . 3 that is exactly as long as or longer than the lower horizontal profile 10 . 2 can be advantageous , for example , to support a front part with a roller curtain and lighting system in a stable fashion , without flexing . a support profile 10 . 4 is installed in front of the vertical profile 10 . 1 , spaced apart from it toward the front , between the lower and upper horizontal profile 10 . 2 , 10 . 3 . the lower horizontal profile 10 . 2 is supported on height - adjustable feet 60 , 61 . the two side frames 10 of each shelving module 1 , 2 , 3 support the base group 11 by their lower horizontal profiles 10 . 2 , support the rear wall group 12 by their vertical profiles 10 . 1 and support profiles 10 . 4 , and support the upper group 13 by their upper horizontal profiles 10 . 3 and produce a stable structure with simple assembly steps . they also make it possible to align a plurality of shelving modules 1 , 2 , 3 next to one another in a stable fashion or design to form the cooling unit system , it thus being possible to transport the cooling unit system as a stable unit by a hoisting device or vehicle . as shown in fig2 , an advantageous exemplary embodiment of a cooling unit system comprises only one shelving module 1 with all of the components of a cooling device except for the possibly provided central heat exchanger 54 , with relevant connecting lines 53 . 1 leading back and forth ( module of design type b ), while the other shelving modules of a cooling unit system are only provided with an evaporator 50 , 50 ′, 50 ″, with the evaporator 50 ′, 50 ″ advantageously but not necessarily being embodied in the form of a continuous unit ( modules of design type a ). the evaporator in modules of design type a is connected via corresponding connectors 53 including connecting lines 53 . 1 and possibly electrical cabling for a signal transmission ( sensors , control ) and electrical energy supply to the remaining relevant components of the cooling device in the shelving module 1 of design type b . all of the shelving modules 1 , 2 , 3 , however , are prepared in the same way for accommodating all of the required components of the cooling device 5 and also with pre - installed sections of the connecting lines 53 . 1 and connectors for a fast , easy connection between the cooling components of the shelving modules and possibly with the central heat exchanger 54 so that with little assembly effort , modules of one design type can be converted into a module of the other design type or possibly even of yet another design type with different or additional components of the cooling device . it is also possible , for example in a cooling unit system with a large number of shelving modules , for there to be more than only one shelving module of design type b or of a design type with additional components of the cooling device . an evaporator 50 ′, 50 ″ extending across a plurality of shelving modules 1 , 2 , 3 can also be subsequently inserted with relative ease between the relevant vertical profiles 10 . 1 and support profiles 10 . 4 that are spaced apart from them and fastened to the vertical profiles and / or to an intermediate partition , in particular an intermediate wall 12 . 2 . the subsequent installation takes place , for example , by inserting the heat exchanger , in particular the evaporator 50 , 50 ′, 50 ″, from a side parallel to the plane of the rear wall or from the front , after the removal of relevant support profiles 10 . 4 , which are then reinstalled . as described in greater detail below , the particular assembly method of the support profiles 10 . 4 permits a simple installation and removal . as evident from fig2 , with the design shown , only one shelving module 1 needs to be connected to the central heat exchanger 54 with the prepared connectors 53 , which include quick couplings and controllable valves , for example , while the other shelving modules 2 , 3 need only be simply connected to one another via the integrated connector 53 . in this case , the central heat exchanger 54 is generally connected via a secondary circuit to the condenser 52 of the relevant shelving module 1 ( design type b ). a different refrigerant is used in the secondary circuit than in the cooling unit system . for example , a compact plate - or tube heat exchanger can be used for the condenser 52 . in the central heat exchanger 54 , incoming heat can be removed for another use of the thermal energy , as indicated by the arrow at the top right . as shown in fig3 and 4 , the base group 11 , the rear wall group 12 , and the upper group 13 are embodied of multiple layers with intermediate spaces embodied therein for the air flow routing . the air flow routing is produced or assisted by fans 56 , 57 , which are embodied in the form of radial fans or diagonal fans and of which , in the exemplary embodiment shown , one is situated in the lower region of the rear wall group 12 and one is situated in its upper region or alternatively two are situated in the upper region of the rear wall group 12 . the upper fan or fans 56 in this case each produces the air flow through the evaporator 50 , 50 ′, 50 ″ from bottom to top , as indicated in fig1 . in this case , a part of the cooling air flow produced by the evaporator 50 , 50 ′, 50 ″ conveyed farther downward on the back side of the inner cover 12 . 1 and flows through the ventilation slots provided in the inner cover 12 . 1 into the cooling chamber 4 in order to keep the latter at the required refrigeration temperature . in order to achieve an optimum cooling , this cooling air flow that is conveyed into the cooling chamber 4 can be fanned out and suitably adapted , for example by reducing the flow resistance toward the bottom . another part of the cooling air flow is conveyed via the upper fan ( s ) 56 through the vertical inner intermediate space 12 . 4 of the rear wall group 12 into an upward intermediate space 13 . 7 connected thereto in the upper group 13 , along the top of a lower cover 13 . 1 that delimits the cooling chamber 4 at the top , to a front top section 13 . 4 , where at the underside of the latter , it emerges from a slit - like outlet opening 13 . 50 with an outlet grating 13 . 5 and forms a cold air curtain 70 on the front side ( see fig1 ). in the front region of the base group 11 , the air flow of the cold air curtain 70 then travels through an inlet opening 11 . 11 which is provided there , is covered by a covering grating 11 . 10 , and extends along the front side , and back into the intermediate space 11 . 6 below the floor cover 11 . 1 in order to then once again flow through the inner vertical intermediate space 12 . 4 of the rear wall group 12 fluidically connected to it in the circuit through the evaporator and the upper fan 56 . in order to ensure a good transmission of the cooling power toward the cooling chamber 4 , the floor cover 11 . 1 , the inner cover 12 . 1 , and the lower cover 13 . 1 of the upper group 13 are composed of or comprise thin - walled plates , in particular of metal or plastic , which are also easy to handle and clean . the plates of the floor cover 11 . 1 are advantageously segmented in the width direction and extend from the inlet opening 11 . 11 in the frontal region of the base group 11 to the lower region of the inner cover 12 . 1 of the rear wall group 12 . the plates of the inner cover 12 . 1 of the rear wall group 12 are advantageously segmented in the vertical direction and extend across the entire width between the two side frames 10 of a shelving module 1 , 2 , 3 . a plurality of plates situated one on top of the other vertically can be inserted or removed in an easily maneuverable way in order to uncover , clean , install , or remove relevant components of the cooling device 5 . as shown in greater detail from fig5 , and 7 , the floor cover 11 . 1 is placed onto a plurality of block - shaped support elements 11 . 5 in the front region , such as plastic blocks composed of or comprising hard plastic , and are placed onto other support elements in the rear region , which are embodied , for example , in the form of support angles with forward - protruding support legs , particularly embodied in the form of an angled strip mounted to the lower section of the support profiles 10 . 4 of the two side frames 10 . under the intermediate space 11 . 6 situated beneath the floor cover 11 . 1 , there is a deflector plate 11 . 2 composed of or comprising heat - insulating and sound - insulating material , the top of which simultaneously serves as a catch basin for liquid that forms and has a drain hole 11 . 21 , to which a drainpipe system is connected . on the underside , the deflector plate 11 . 2 is provided with a system 11 . 20 of molded conduits by which , beneath the deflector plate 11 . 2 , a lower , outer horizontal intermediate space is embodied in the form of a lower , outer air flow conduit 11 . 7 , which is covered at the bottom by a base plate 11 . 3 or a plurality of partial base plates or cover plates on the underside of the base group 11 . as shown in fig6 and 7 , a plurality of conduits of the system 11 . 20 of molded conduits leading from respective inlet openings 11 . 70 are brought together at the rear of the deflector plate 11 . 2 on its underside and transition via a relatively wide recess or molded area of the deflector plate 11 . 2 into a rear , outer vertical intermediate space or outer vertical flow conduit 12 . 5 of the rear wall group 12 fluidically connected to them , which is embodied between the front side of the outer casing 12 . 3 and an intermediate partition with an intermediate wall 12 . 2 between the outer casing 12 . 3 and the inner cover 12 . 1 , as is also shown by fig3 and partially by fig1 . in order to produce the transition between the lower outer air flow conduit 11 . 7 and the lower section of the outer vertical flow conduit 12 . 5 , the lower region of the relatively thick - walled insulating outer casing 12 . 3 can be cut out and , for example , only a thin cover plate can be left , which covers an insulation layer of the outer casing 12 . 3 on the back side . the recess in the insulating outer casing 12 . 3 can , for example , be produced by subsequently cutting it out from the front , thin cover plate and the insulation layer or even during the manufacture by leaving this region free during the foaming and recessing of the front cover plate . in this way , the transition and a lower section of the vertical outer flow conduit 12 . 5 can be suitably positioned and can pass , for example , downstream of the lower fan 57 and to one side of a compressor accommodated in the lower region of the rear wall group 12 ( see fig1 ). then , the vertical outer flow conduit 12 . 5 is spread out toward the top over the entire width of the rear wall group 12 by baffle elements . the fan 57 situated in the lower region of the rear wall group 12 is situated in the outer vertical intermediate space or in the vertical outer flow conduit 12 . 5 formed by it , which extends upward through the intermediate partition with the intermediate wall 12 . 2 behind the evaporator 50 , 50 ′, 50 ″ and in front of the outer casing 12 . 3 and is connected to an outer upper intermediate space or outer upper flow conduit 13 . 8 , forming a fluidic connection , as is clear from fig8 and 9a in connection with fig1 . in the upper group 13 , the outer upper flow conduit 13 . 8 is divided from the inner upper flow conduit 13 . 7 by an intermediate cover 13 . 2 and extends between the intermediate cover 13 . 2 and the underside of the upper cover 13 . 3 to the front top section 13 . 4 and exits from the latter through an outlet slit 13 . 80 provided on the underside , spaced apart from the outlet opening 13 . 50 with the outlet grating 13 . 5 , in order to form , on the front side of the relevant shelving module 1 , 2 , 3 or cooling unit system , a warm air curtain 71 situated in front of the cold air curtain 70 . in the front region of the base group 11 , the air flow produced by the warm air curtain 71 enters a slit - like inlet opening situated in front of the cover grating 11 . 10 , into the lower outer intermediate space or lower outer flow conduit in order to form a warm air circuit . as shown in fig9 a and 10 , the lower cover 13 . 1 , the intermediate cover 13 . 2 , and the upper cover 13 . 4 in the upper group 13 are held apart from one another by a plurality of jointly used support pins 13 . 6 in order to form the inner upper intermediate space 13 . 7 and the outer upper flow conduit 13 . 8 . the upper cover 13 . 3 in this case is embodied in a thermally insulated way in the form of an insulating plate composed of or comprising insulation , for example in a way that corresponds to that of the outer casing 12 . 3 . the insulating cover 13 . 3 , together with the insulating outer casing 12 . 3 of the rear wall group 12 and the insulating deflector plate 11 . 2 of the base group 11 , forms a shell - like thermal insulation . in the exemplary embodiment shown , the insulating outer casing 12 . 3 of the rear wall group 12 , the insulating upper cover 13 . 3 of the upper group 13 , and the insulating deflector plate 11 . 2 of the base group 11 are each mounted to the inside of the vertical profile 10 . 1 oriented toward the cooling chamber 4 , to the upper horizontal profiles 10 . 3 , and to the lower horizontal profiles 10 . 2 , respectively , of the associated side frames 10 . at least on the inside oriented toward the cooling chamber numeral 4 , the outer casing 12 . 3 is provided with a stable covering or is entirely embodied in the form of a stable , load - bearing plate so as to permit the intermediate wall 12 . 2 of the intermediate partition to be mounted thereon in a stable fashion , for example by a vertical spacer profiles that have an h - shaped cross - section , with the relevant spacing for the outer vertical intermediate space . the intermediate wall 12 . 2 can be bent at the vertical edges , such as in a z shape , with end sections protruding outward in a flange - like fashion , and can be fastened to the side of the outer casing 12 . 3 oriented toward the cooling chamber 4 , such as by screws or rivets . the intermediate wall 12 . 2 , which is composed of or comprises sheet steel or another suitable metal , offers a stable support base for the attachment of the evaporator 50 , 50 ′, 50 ″, which advantageously extends across a plurality of shelving modules 1 , 2 , 3 , as described above . the evaporator 50 , 50 ′, 50 ″, which can be composed of or comprises sections associated with the shelving modules 1 , 2 , 3 , is thus situated in the region of the cooling air conduit in front of the warm air conduit and is mounted there in stable fashion by connectors of the receiving device , such as by fastening screws and fastening lugs . in an evaporator 50 , 50 ′ 50 ″ extending across a plurality of shelving modules 1 , 2 , 3 , there is enough space provided at least on one side , ( for example , see fig1 ) so that connectors can be placed in this region for connecting lines for the refrigerant supply and for the injection of the refrigerant , such as a plurality of injection valves of the injection system , for the evaporation . the evaporator 50 , 50 ′, 50 ″ in this case is not fastened to the frame profiles or support profiles so that on the one hand , no thermal transmission to the outside via the frame occurs and on the other hand , the support profiles 10 . 4 can be installed and removed without hindrance . in alternative exemplary embodiments , in lieu of an evaporator for the cooling , it is also possible for another heat exchanger to be built into the rear wall group 12 or the upper region of the cooling unit , with the refrigerant advantageously being cooled in a remotely positioned central heat exchanger ( such as with a water chiller ). the support profile 10 . 4 is screwed to and supported on the underside of the upper horizontal profile 10 . 3 of the side frame 10 in stable fashion by an intermediate piece that is elongated from front to back and an upper support plate 10 . 50 ( see fig9 b ). as already shown in fig5 and illustrated in fig9 b and 9c , on its underside , the support profile 10 . 4 is supported by a support plate 10 . 40 that extends from front to back relative to the top of the lower horizontal profile 10 . 2 of the relevant side frame 10 . advantageously , an intermediate piece 10 . 41 made of hard plastic is inserted , which produces both a thermal insulation and a sound installation . this attachment permits the support profiles 10 . 4 to be easily installed and removed . in this case , the fastening elements for attaching the intermediate pieces to the horizontal profiles 10 . 2 , 10 . 3 on the one hand and for attaching the support plate 10 . 40 , 10 . 50 of the support profiles 10 . 4 to the intermediate pieces on the other hand are offset so that no continuous metallic thermally conductive contact is produced between the support profile 10 . 4 and the horizontal frame profiles 10 . 2 and 10 . 3 . the metallic support profiles 10 . 4 are provided with rows of holes in a predetermined , preferably standardized , spacing pattern , in which the plates of the inner cover 12 . 1 of the rear wall group 12 are accommodated so that they can be easily hooked and unhooked . in addition , support arms for the shelves can easily be hooked into the support profiles at the desired height . anti - tipping devices 62 protruding downward are mounted at the lower end section of the vertical profiles 10 . 1 , which advantageously permit an adaptation to uneven floors , for example by resilient or elastic intermediate elements and / or adjusting elements . a lighting device 64 can be positioned in the front region of the base group 11 and / or upper group 13 . advantageously , a roller curtain 63 is situated in the front , upper region in order to close the cooling chamber at the front , for example during non - business hours , and thus to save cooling energy . sealing components are installed at the sides in order to seal the intermediate spaces in the base groups 11 , rear wall groups 12 , and upper groups 13 of the shelving modules 1 , 2 , 3 . in this case , the sealing components are advantageously inserted , for example , between the adjacent outer casings 12 . 3 , the upper covers 13 . 3 , and particularly also between the deflector plates 11 . 2 . additional sealing elements can in fact or solely be situated between the side frames 10 of adjacent shelving modules 1 , 2 , 3 aligned next to one another in order to seal the cooling chamber 4 between the shelving modules 1 , 2 , 3 , but the side frames 10 are clamped to one another in a stable fashion and with a definite positioning , preferably only by interposed spacer elements such as spacer sleeves . various embodiments of sealing elements can be used for the sealing components , for example sealing strips with a mushroom - shaped cross - section and leaves . in addition , with adapted sealing components , side walls can be attached to the side frames 10 in a corresponding fashion , such as can be attached to the narrow edges of the outer casing 12 . 3 , to the lower cover 13 . 3 , and to the deflector plates 11 . 2 in a sealed fashion at the respective connecting edge . various lateral partitioning elements can be used for laterally sealing the inner intermediate spaces 11 . 6 , 12 . 4 , 13 . 7 for the cold air flow and the outer flow conduits 11 . 7 , 12 . 5 , 13 . 8 for the warm air flow . in an exemplary embodiment that has been tested , with a plurality of shelving modules 1 , 2 , 3 in a row , the inner intermediate spaces 12 . 4 of the rear wall group 12 are continuously connected to one another across the entire cooling unit system and only terminated in a sealed fashion at the two ends of the cooling unit system by relevant partitioning elements . this has one advantage of not hindering the use of a continuous evaporator 50 ′, 50 ″. by contrast , in an advantageous embodiment , the inner intermediate spaces 11 . 6 and 13 . 7 of the base group 11 and upper group 13 are partitioned on both sides of each shelving module 1 , 2 , 3 and are connected to the vertical , inner intermediate space 12 . 4 by appropriate air baffle plates in order to avoid disadvantageous flow leakages . the inner cover 12 . 1 of the rear wall group 12 is supplemented by intermediate plates in the transition region between the aligned shelving modules 1 , 2 , 3 . in the tested exemplary embodiment , the outer flow conduits 11 . 7 , 12 . 5 , 13 . 8 are respectively partitioned for each shelving module 1 , 2 , 3 . in the rear wall group 12 , this occurs in the region of or near the intermediate wall 12 . 2 , for example by its lateral edges or by inserted strips , and correspondingly also in the region of the upper group 13 and in the region of the base group 11 , for example by the molded indentations on the underside of the deflector plate 11 . 2 . fig1 a through 11x show one exemplary embodiment for successive assembly steps of constructing a shelving module 1 , 2 , 3 or cooling unit as well as a system composed of or comprising two shelving modules . if so desired , individual assembly steps here can also be omitted , changed , or swapped . first , according to fig1 a , two side frames 10 are each produced from a vertical profile 10 . 1 , a lower horizontal profile 10 . 2 protruding forward in the vertical profile &# 39 ; s lower region , and an upper horizontal profile 10 . 3 protruding forward in the vertical profile &# 39 ; s upper region . the undersides of the lower horizontal profiles 10 . 2 are provided with height - adjustable feet 60 , 61 and at the lower end of the vertical profiles 10 . 1 , the anti - tipping device 62 protrudes downward . in the exemplary embodiment shown , the upper horizontal profile 10 . 3 is embodied as shorter than the lower horizontal profile 10 . 2 , but in a likewise advantageous embodiment , the upper horizontal profile 10 . 3 can be embodied as exactly the same length or longer than the lower horizontal profile 10 . 2 , in order to be able to attach the upper group 13 in a stable fashion . the two side frames 10 are embodied as spaced apart from each other in accordance with the width of the shelving module 1 , 2 , 3 . in another step ( fig1 b ), the base plate 11 . 3 as the lower cover of the base group 11 is provided with a back side 11 . 30 that is to be turned toward the vertical profiles 10 . 1 and the drain hole 11 . 21 . this covers the underside of the deflector plate 11 . 2 with the molded conduits 11 . 20 , as shown in the subsequent assembly step according to fig1 c . in lieu of the base plate 11 . 3 , however , the molded conduits 11 . 20 can also be separately covered and advantageously sealed by one or more partial plates . as also shown in fig1 c , the molded conduit 11 . 20 that is composed of or comprises , for example , a plurality of sub - conduits feeds into a relatively wide slit - like outlet opening 11 . 22 situated on one side of the back of the deflector plate 11 . 2 , opens upward and is delimited on the back side by a bending of the base plate 11 . 3 or a partial plate . the drawing also shows the inlet openings 11 . 70 of the molded conduit 11 . 20 . in a subsequent step according to fig1 d , the thus - prepared deflector plate 11 . 2 is placed onto the lower horizontal profiles 10 . 2 and fastened . then according to fig1 e , the thermally insulating outer casing 12 . 3 is mounted onto the front side of the vertical profiles 10 . 1 . in the lower region , the outer casing 12 . 3 is provided with a compressor opening 12 . 30 extending through it for subsequent installation of the compressor , which is situated next to the outlet opening 11 . 22 of the deflector plate 11 . 2 . above the outlet opening 11 . 22 , a lower fan opening 12 . 10 is provided in the outer casing 12 . 3 , but is covered on the back side of the outer casing 12 . 3 such as with a thin covering layer of the outer casing 12 . 3 or a separate plate and forms a conduit for the air flow from the outlet opening 11 . 22 of the lower fan 57 to be subsequently installed . in another step , the upper cover 13 . 3 is mounted to the underside of the upper horizontal profiles 10 . 3 ( fig1 f ). in the exemplary embodiment shown , the upper cooling component receptacle 13 . 30 is cut out from the right , rear of the top side of the upper cover 13 . 3 , leaving only a lower covering layer of the thermally insulating upper cover 13 . 3 . in the next step shown in fig1 g , spacers 12 . 31 are fastened to the front side of the outer casing 12 . 3 in the vicinity of or near the vertical edges . then , the support profiles 10 . 4 are installed between the upper and lower horizontal profiles 10 . 3 , 10 . 2 , in their rear region , spaced apart from and parallel to the front side of the vertical profiles 10 . 1 , using the support plates 10 . 40 , 10 . 50 and the insulating intermediate pieces between the underside of the upper cover 13 . 3 and the top side the deflector plate 11 . 2 ( fig1 h ). in the next step of the method ( fig1 i ), fixing parts 10 . 10 are mounted , if necessary , between the support profiles 10 . 4 and the vertical profiles 10 . 1 , for stiffening purposes or to serve as holding elements , but can also be omitted if the supporting force is sufficient . in a subsequent step ( fig1 j ), the lower fan 57 is mounted in front of the lower fan opening 12 . 10 and in subsequent steps , is enclosed with a fan housing 12 . 11 ( fig1 k and 11l ) in order to form the lower region of the outer vertical flow conduit . in another step ( fig1 m ), the front side of the outer casing 12 . 3 has strip - like vertical spacers 12 . 32 mounted onto it , onto which the intermediate wall 12 . 2 is mounted , spaced apart from the outer casing 12 . 3 to form the upper region of the vertical flow conduit , producing a connection to the upper opening of the fan housing 12 . 11 ( fig1 n ). a plate - like cooling air baffle plate 12 . 40 is mounted onto the intermediate wall 12 . 2 and spaced apart from it , behind which the evaporator 50 , 50 ′, 50 ″ ( not shown ) or another heat exchanger is placed . in addition , the upper fan 56 is mounted on a plate that is spaced apart from the intermediate wall 12 . 2 ( fig1 o and 11p ). the upper fan 56 or instead of it , a plurality , such as two , upper fans situated next to one another , each is covered by an upper fan cover 12 . 20 in a housing - like fashion . cooling air flowing upward out of the evaporator 50 , 50 ′, 50 ″ or heat exchanger is taken in by the upper fan 56 , for example in the axial direction , and conveyed away in the radial direction , in fact with one partial flow traveling downward on the inside of the cooling air baffle plate 12 . 40 oriented toward the cooling chamber 4 and one partial flow traveling upward into the upper , inner intermediate space 13 . 7 of the correspondingly added upper group 13 ( fig1 q and 11r ). the housing - like upper fan cover 12 . 20 is embodied to route the air flow in the desired direction and with the desired intensity and can also be provided with an intermediate partition between two fans 57 in order to avoid a reciprocal influence ( such as short - circuiting ). for example , outflow openings of a calibrated size can be provided in the fan cover 12 . 20 , toward the top and bottom and also toward the front if so desired . the outer vertical flow conduit 12 . 5 is also connected to the relevant outer upper flow conduit 13 . 8 of the upper group 13 , after which the outer upper flow conduit 13 . 8 and the upper intermediate space 13 . 7 in the upper group 13 are produced using the support pins 13 . 6 ( fig1 s and 11t ). in this case , the slit - like outlet opening 13 . 50 and the outlet slit 13 . 80 for the cold air curtain 70 and the warm air curtain 71 are also provided in the front , lower region of the upper group 13 . in other steps , a cooling unit system is constructed , such as out of two shelving modules 1 , 2 , as shown in fig1 u , 11v , 11w , and 11x . in these steps , the side frames 10 on the vertical profiles 10 . 1 , the lower horizontal profiles 10 . 2 , and / or the upper horizontal profiles 10 . 3 are clamped to each other in a definite relative position with the interposition of spacer elements such as spacer sleeves and are sealed along the narrow edges that face one another on their outer casings 12 . 3 , deflector plates 11 . 2 , and upper covers 13 . 3 with the interposition of scaling elements such as sealing strips 11 . 8 with a mushroom - shaped cross - section .
a cooling unit arrangement including at least two mutually arranged shelf modules , with a base group , a rear wall group and an upper group with respective covering parts and forming a cooling chamber , and a cooling device . the shelf modules have identical modular parts with frame profiles and which support the base group , the rear wall group and the upper group and at least the rear wall group of each shelf module is equipped with components of the cooling device . said shelf arrangement is provided with a common evaporator arranged in the rear wall group and extending along several or all shelf modules .