EP2921804B1

EP2921804B1 - Refrigerating apparatus with improved air circulation system

Info

Publication number: EP2921804B1
Application number: EP14160677.2A
Authority: EP
Inventors: Augusto Buosi; Marco Beni; Roberta Nicola; Vittorio Velli
Original assignee: Electrolux Appliances AB
Current assignee: Electrolux Appliances AB
Priority date: 2014-03-19
Filing date: 2014-03-19
Publication date: 2019-05-08
Anticipated expiration: 2034-03-19
Also published as: EP2921804A1; PL2921804T3

Description

Field of the invention

The present invention generally relates to a refrigerating apparatus, both for domestic and professional use. More particularly, the present invention relates to a refrigerating apparatus having an improved circulation of refrigerating air.

Background of the invention

A conventional refrigerating apparatus comprises one or more refrigerating compartments, which allow storing and preserving food by refrigeration.
Food refrigeration is allowed by circulation of refrigerating air within the refrigerating compartments.
Refrigerating air circulation is of the utmost importance for good food preservation, and is particularly burdensome to design in refrigerating apparatuses integrating refrigerating compartments intended to be at reciprocally different temperatures (or combined refrigerating apparatuses).
Considering for example a combined refrigerating apparatus integrating two refrigerating compartments (e.g., a lower-temperature refrigerating compartment and a higher-temperature refrigerating compartment), most of the known solutions are substantially based on the common approach of continuously circulating refrigerating air between both the refrigerating compartments. According to such approach, cold refrigerating air from a heat pump evaporator is first fed to the lower-temperature refrigerating compartment, where it warms up by thermal exchange with food, and then to the higher-temperature refrigerating compartment. Thereafter, the relatively warm refrigerating air from the higher-temperature refrigerating compartment is returned to the evaporator for a new cycle.
In the state of the art, solutions are known aimed at improving refrigerating air circulation efficiency.
EP0793066 discloses an appliance comprising a lower-temperature refrigerating compartment and a higher-temperature refrigerating compartment separated from each other by a horizontal partition wall. The refrigerating air from an evaporator is circulated through the lower-temperature refrigerating compartment, and reaches the higher-temperature refrigerating compartment via a gap between a front edge of the partition wall and an appliance door.
GB867292 discloses an appliance comprising a refrigerating compartment, and a fan, arranged at an upper rear thereof, for forcing air downwardly over an evaporator within a rear flue. Part of the refrigerating air from the evaporator flows to a lower part of the refrigerating compartment, and the remainder is diverted by a baffle into a hollow shelf, from which it is discharged, through front apertures, into the refrigerating compartment at the appliance door. Scoops divert some of the refrigerating air flowing within the shelf into a suspended container.
DE 11 43 215 B discloses a multi-temperature refrigerator according to the preamble of claim 1.
DE 25 40 037 discloses a cooling device with an upper cooling compartment which is constructed to allow a continuous extraction of cooled material, such as ice, and with a bottom cooling compartment which accepts a material supply. The two cooling compartments within the common outer housing form between them an air guidance channel, which at one end is connected with the two cooling compartments and at its other end opens into an intake chamber enclosing a blower. This intake chamber is connected with the upper cooling chamber via an upwards directed channel which encloses an upper evaporator. It is connected with the lower cooling compartment via a downwards directed channel which encloses a lower evaporator. The arrangement is such that in operation, there is an air circulation of different temperature in the two cooling compartments.

Summary of invention

The Applicant has realized that the known solutions are not satisfactory for modern technological requirements.
In particular, according to the Applicant, the fact that the refrigerating air in each refrigerating compartment (or in each region of a same refrigerating compartment, as for GB867292 ) directly comes from another refrigerating compartment (or from another region of a same refrigerating compartment, as for GB867292 ), makes the known solutions affected by problems of non-ideal temperature within the refrigerating compartments. Indeed, the temperature of the refrigerating air flowing into the higher-temperature refrigerating compartment from the lower-temperature refrigerating compartment strongly depends on amount of food stored therein, as well as on user operations (e.g., appliance doors opening for accessing the refrigerating compartments, which causes heat input). This results in food preservation issues, as well as energy issues (as an uncontrollable number of cycles for restoring the desired temperature within the refrigerating compartments is needed).
As far as EP0793066 is concerned, the refrigerating air from the evaporator, upon being fed to the lower-temperature compartment, is split into different flows, each one directly reaching (through the gap in the horizontal partition wall) the higher-temperature refrigerating compartment at different times and with different temperature (as resulting from different thermal exchange experienced by each flow along the corresponding path). Thus, the higher-temperature refrigerating compartment is affected by a non-uniform, and non-ideal, temperature within it.
Similarly, as far as GB867292 is concerned, the refrigerating air that, from the evaporator, is split into the lower part of the refrigerating compartment, into the hollow shelf and into the suspended container, flows back directly to the upper part of the refrigerating compartment with non-uniform and non-ideal temperature (as resulting from different thermal exchange experienced by each flow along the corresponding path).
The Applicant has tackled the problem of devising an improved solution able to overcome the above-discussed, as well as other, drawbacks.
The present invention thus relates to a refrigerating apparatus comprising a cabinet, first and second refrigerating compartments for food storage separate from each other, a first air channel between the cabinet and a first refrigerating compartment wall, and a second air channel between the cabinet and a second refrigerating compartment wall, wherein the first and second air channels are configured for canalizing refrigerating air into the first and second refrigerating compartments, respectively, and wherein the first refrigerating compartment opens out to the second air channel for allowing the refrigerating air within the first refrigerating compartment to flow into the second refrigerating compartment through the second air channel, and the second refrigerating compartment opens out to the first air channel for allowing the refrigerating air within the second refrigerating compartment to flow into the first refrigerating compartment through the first air channel.
Preferably, the refrigerating apparatus comprises a liner delimiting the first and second refrigerating compartments, the liner having a rear wall comprising said first and second refrigerating compartment walls and being spaced apart from a rear panel of the cabinet so as to define a rear air channel comprising said first and second air channels.
The liner may comprise, at opposite sides thereof, first and second protruding edges laterally delimiting said rear air channel.
The refrigerating apparatus may further comprise a partition baffle between the rear wall and the rear panel for partitioning the rear air channel into the first and second air channels, the partition baffle being shaped such that at least one portion of the first air channel extends between the second refrigerating compartment wall and the cabinet and at least one portion of the second air channel extends between the first refrigerating compartment wall and the cabinet.
The partition baffle is preferably made of a single piece with the liner.
In a possible embodiment, the partition baffle comprises a U-shaped central portion, and, at the ends thereof, first and second appendices extending towards the first and second protruding edges, respectively.
Preferably, said at least one portion of the first air channel comprises a first portion delimited from below by the U-shaped central portion, and said at least one portion of the second air channel comprises a second portion delimited by the U-shaped central portion, the first appendix, and the first protruding edge, and a further second portion delimited by the U-shaped central portion, the second appendix, and the second protruding edge.
Preferably, the refrigerating apparatus further comprises, at said at least one portion of the first air channel, first liner openings for fluidly connecting the second refrigerating compartment to the first air channel, and at said at least one portion of the second air channel, second liner openings for fluidly connecting the first refrigerating compartment to the second air channel.
The second liner openings may comprise first and second openings in the second portion and in the further second portion, respectively, of said at least one portion of the second air channel.
The refrigerating apparatus may further comprise a separator extending substantially horizontally between the rear wall of the liner and the cabinet front for separating the first refrigerating compartment from the second refrigerating compartment, the separator defining at least one air passage fluidly connecting the second refrigerating compartment to the first liner opening to allow air flow from the second refrigerating compartment into the first air channel through the at least one air passage and the first liner opening.
The separator may comprise a separator top that defines a bottom of the first refrigerating compartment and a separator bottom that defines a top of the second refrigerating compartment, the separator top and the separator bottom being so shaped as to define between them the at least one air passage.
The separator top and the separator bottom are preferably made of materials capable of providing thermal insulation between the first and second refrigerating compartments.
The refrigerating apparatus may further comprise, along the rear air channel, at least one heat pump evaporator for properly cooling the refrigerating air down to the intended refrigerating temperature, and a fan for promoting refrigerating air circulation.
The at least one evaporator preferably comprises first and second evaporators associated with the first and second refrigerating compartments, respectively.
In a preferred embodiment, the first evaporator is arranged along the first air channel, and the second evaporator and the fan are arranged along the second air channel.
Advantageously, the first and second refrigerating compartments comprise combinations of fridge, freezer or zero-degree compartments.
The proposed solution allows achieving ideal temperature within the refrigerating compartments. Indeed, thanks to mechanical separation and thermal insulation between the refrigerating airs in the lower-temperature and higher-temperature refrigerating compartments, the refrigerating air flowing from the higher-temperature refrigerating compartment is channeled to the lower-temperature refrigerating compartment only after having passed a first evaporator, and the refrigerating air flowing from the lower-temperature refrigerating compartment is fed to the higher-temperature refrigerating compartment only upon channeling thereof (which provides a uniform mixing thereof) and, preferably, only after having passed a second evaporator. This results in very good food preservation, as well as energy saving.

Brief description of the annexed drawings

These and other features and advantages of the invention will be made apparent by the following description of some exemplary and non limitative embodiments thereof. For its better intelligibility, the following description should be read making reference to the attached drawings, wherein:

Figure 1 schematically shows a cross-sectional side view of a refrigerating apparatus according to an embodiment of the invention;
Figure 2 shows a perspective rear view with partly removed parts of the refrigerating apparatus of Figure 1 according to an embodiment of the invention, and
Figures 3A-3B show perspective side views of a part of the refrigerating apparatus of Figure 1 according to an embodiment of the invention.

Detailed description of preferred embodiments of the invention

Referring now to the drawings, Figure 1 schematically shows a not-in-scale cross-sectional side view of a refrigerating apparatus 100 according to an embodiment of the invention. For the sake of description ease, such figure will be discussed together with Figure 2 , which shows a perspective rear view with partly removed parts of the refrigerating apparatus 100 according to an embodiment of the invention, and with Figures 3A and 3B , the latter showing, according to an embodiment of the invention, perspective side views of a part of the refrigerating apparatus 100.
The refrigerating apparatus 100 comprises a number of well-known electronic, mechanical and/or electro-mechanical components - however, for the sake of description ease and conciseness, only those being relevant for understanding the invention will be introduced and discussed in the following.
Preferably, the refrigerating apparatus 100 is of the combined-type, as integrating a number of refrigerating compartments where food can be stored and preserved by refrigeration at different temperatures. In the example at issue, the refrigerating apparatus 100 comprises two refrigerating compartments, namely an upper refrigerating compartment 105_U and a lower refrigerating compartment 105_L.
For example, the upper 105_U and lower 105_L refrigerating compartments may comprise combinations of fridge, freezer or zero-degree compartments, which have cooling temperatures over, below or near 0°C, respectively (and typically ranging between 3°C and 7°C, -18°C and -27°C, and 0°C and 3°C, respectively). In the considered example, the upper refrigerating compartment 105_U will be assumed operating at higher temperature (hereinafter, higher-temperature refrigerating compartment) than the lower refrigerating compartment 105_L (hereinafter, lower-temperature refrigerating compartment).
Shelves and other structures for supporting and storing food articles may be provided within both upper 105_U and lower 105_L refrigerating compartments (as partly visible in Figures 2 , 3A and 3B ).
The refrigerating apparatus 100 comprises a substantially parallepiped-shaped cabinet 110, having a top panel 110_T, a rear panel 110_R, a bottom panel 110_B and side panels (not visible). Upper 115_U and lower 115_L doors are hingedly mounted to a cabinet 110 front to provide selective access to the upper 105_U and lower 105_L refrigerating compartments, respectively.
The refrigerating apparatus 100 further comprises a liner 120 having a top wall 120_T, a rear wall 120_R, a bottom wall 120_B. As visible in Figure 2 , the liner 120 is inwardly spaced apart from the cabinet 110 by means of first 205₁ and second 205₂ protruding edges provided at opposite side ends thereof, on both top and back parts of the apparatus. Upon cabinet 110 mounting, a gap between the liner 120 and the cabinet 110 itself is thus formed by spacing effect of the first 205₁ and second 205₂ protruding edges.
As can be best appreciated in Figure 1 , the gap between the liner 120 and the cabinet 110 identifies air channels through which cooling air to and from the upper 105_U and lower 105_L refrigerating compartments is made to flow.
Preferably, a top air channel A_CH,T is defined between the top wall 120_T of the liner 120 and the top panel 110_T of the cabinet 110, and a bottom air channel A_CH,B is defined between the bottom wall 120_B of the liner 120 and the bottom panel 110_B of the cabinet 110. As illustrated, the top 120_T and bottom 120_B walls of the liner 120 have lower lengths than the top 110_T and bottom 110_B panels of the cabinet, respectively, which allows refrigerating air flowing through the top A_CH,T and bottom A_CH,B air channels to be fed into the upper 105_U and lower 105_L compartments, respectively.
A rear, substantially straight, air channel A_CH,R is instead defined between the rear wall 120_R of the liner 120 and the rear panel 110_R of the cabinet 110.
According to the proposed solution, the rear air channel A_CH,R comprises, between the cabinet 110 (i.e., the rear panel 110_R thereof) and an upper refrigerating compartment 105_U wall (i.e., an upper part of the rear wall 120_R of the liner 120 associated with, e.g. facing, the upper refrigerating compartment 105_U, hereinafter upper rear wall 120_RU ), a first, e.g. upper, rear air channel A_CH,RU for canalizing the refrigerating air into the top air channel A_CH,T (and hence into the upper refrigerating compartment 105_U ), and, between the cabinet 110 (i.e., the rear panel 110_R thereof) and a lower refrigerating compartment 105_L wall (i.e., a lower part of the rear wall 120_R of the liner 120 associated with, e.g. facing, the lower refrigerating compartment 105_L, hereinafter lower rear wall 120_RL ), a second, e.g. lower, rear air channel A_CH,RL, separate from the upper rear air channel A_CH,RU, for canalizing the refrigerating air into the bottom air channel A_CH,B (and hence into the lower refrigerating compartment 105_L ).
Along the rear air channel A_CH,R, one or more heat pump evaporators are provided for properly refrigerating the refrigerating air down to the intended temperatures, and a fan F is provided for promoting refrigerating air circulation.
In the example at issue, upper E_U and lower E_L evaporators, associated with the upper 105_U and lower 105_L compartments, respectively, are preferably arranged along the upper A_CH,RU and lower A_CH,RL rear air channels, respectively. Preferably, also the fan F is arranged along the lower rear air channel A_CH,RL. Even more preferably (as illustrated) the fan F is arranged above the lower evaporator E_L. Provision of the upper evaporator E_U, of the lower evaporator E_L, and of the fan F, not limiting for the invention, may be achieved by any known housing, mounting and fixing techniques.
As conceptually illustrated in Figure 1 (and better discussed in the following), the upper refrigerating compartment 105_U opens out to (thus, being fluidly connected to) the lower rear air channel A_CH,RL for allowing the refrigerating air within the upper refrigerating compartment 105_U to be fed into the lower refrigerating compartment 105_L through the lower rear air channel A_CH,RL, and the lower refrigerating compartment 105_L opens out to (thus, being fluidly connected to) the upper rear air channel A_CH,RU for allowing the refrigerating air within the lower refrigerating compartment 105_L to be fed into the upper refrigerating compartment 105_U through the upper rear air channel A_CH,RU.
As will be best understood in the following, separation between the upper A_CH,RU and lower A_CH,RL rear air channels allows preventing the refrigerating air from the upper refrigerating compartment 105_U (and towards the lower rear air channel A_CH,RL ) from mixing with the refrigerating air from the lower refrigerating compartment 105_L (and towards the upper rear air channel A_CH,RU ).
Separation between the refrigerating airs in the upper 105_U and lower 105_L refrigerating compartments, as well as provision of both upper E_U and lower E_L evaporators, ensures that the refrigerating air flowing from the upper refrigerating compartment 105_U is channeled to the lower refrigerating compartment 105_L only after having passed the lower evaporator E_L, and that the refrigerating air flowing from the lower refrigerating compartment 105_L is fed to the upper refrigerating compartment 105_U only after having passed the upper evaporator E_U. This results in ideal temperature of the refrigerating air fed into the upper 105_U and lower 105_L refrigerating compartments, and in very good food preservation.
However, according to another embodiment, not shown, only one evaporator, i.e. the lower evaporator E_L (i.e., only the evaporator associated to the lower-temperature refrigerating compartment), is provided. In this case, the refrigerating air flowing from the lower refrigerating compartment 105_L would be fed to the upper refrigerating compartment 105_U only upon channeling thereof (through the upper rear air channel A_CH,RU and the top channel A_CH,T ). Channeling of the refrigerating air, instead of feeding it directly into the higher-temperature refrigerating compartment (as for the known solutions), provides air mixing and heat distribution, which results in an almost uniform temperature of the refrigerating air.
As can be best appreciated in Figure 2 , a partition baffle 210 is preferably provided for partitioning the rear air channel A_CH,R into said separate upper A_CH,RU and lower A_CH,RL rear air channels. In the example at issue, the partition baffle 210 is part of the liner 120, preferably made of a single piece with it.
Along a transverse direction (orthogonal to the rear wall 120_R surface), the partition baffle 210 extends between the rear wall 120_R of the liner 120 and the rear panel 110_R of the cabinet 110, whereas, in a plane parallel to the rear wall 120_R surface, the partition baffle 210 extends between the first 205₁ and second 205₂ protruding edges of the liner 120. Thus, complete and effective mechanical separation between the upper A_CH,RU and lower A_CH,RL rear air channels is achieved.
Arrangement and shape of the partition baffle 210 are not limiting for the invention, as depending on sizes of the upper 105_U and lower 105_L refrigerating compartments, as well as on other specific design options.
According to the advantageous illustrated embodiment, the partition baffle 210 is arranged and shaped such that at least one end portion of the upper rear air channel A_CH,RU extends between the lower refrigerating compartment 105_L wall (i.e., the lower rear wall 120_RL ) and the cabinet 110 (i.e., the rear panel 110_R part facing the lower rear wall 120_RL ), and at least one end portion of the lower rear air channel A_CH,RL extends between the upper refrigerating compartment 105_L wall (i.e., the upper rear wall 120_RU ) and the cabinet 110 (i.e., the rear panel 110_R part facing the upper rear wall 120_RU ) - see Figure 2 , showing the partition baffle 210 substantially astride of the upper 105_U and lower 105_L refrigerating compartments.
Preferably, as visible in Figure 2 , the partition baffle 210 comprises a substantially U-shaped central portion 210_C, and, at the ends thereof, first 210₁ and second 210₂ appendices extending (e.g., slightly inclined) toward the first 205₁ and second 205₂ protruding edges, respectively. The U-shaped central portion 210_C, the first appendix 210₁, and the protruding edge 205₁ on one side, and the U-shaped central portion 210_C, the second appendix 210₂, and the protruding edge 205₂ on the other side, delimit respective top end portions of the lower rear air channel A_CH,RL, whereas the U-shaped central portion 210_C delimits a bottom end portion of the upper rear air channel A_CH,RU. In particular, the two top end portions of the lower rear air channel A_CH,RL are arranged opposite to each other with respect to the bottom end portion of the upper rear air channel A_CH,RU, i.e. on the opposite lateral sides of such bottom end portion.
As will be best understood shortly, the illustrated arrangement and shape of the partition baffle 210 is intended to substantially match suitable air openings of the liner 120 (hereinafter, liner openings).
Indeed, a number of liner openings 215₁,215₂ are provided in the rear wall 120_R in correspondence of the top end portions of the lower rear air channel A_CH,RL, for fluidly connecting the upper refrigerating compartment 105_L to the lower rear air channel A_CH,RL. In particular, for each top end portion there can be one opening or one group of liner openings. Preferably, as illustrated, the liner openings 215₁,215₂ are in the form of gratings, although this should not be construed limitatively.
Still in the rear wall 120_R, a number of further liner openings 220₁,220₂ are provided, in correspondence of the bottom end portion of the upper rear air channel A_CH,RU for fluidly connecting the lower refrigerating compartment 105_L to the upper rear air channel A_CH,RU (as discussed herebelow). As visible in Figure 2 , in the illustrated embodiment two openings 220₁,220₂ are provided that are horizontally aligned to each other, but the number of such openings can be lower (i.e. only one opening) or higher, so that also in this case it is possible to refer to a group of openings, where the group can be formed by one or more openings.
The refrigerating apparatus 100 further comprises a separator assembly 130 extending substantially horizontally between the rear wall 120_R of the liner 120 (for example, as illustrated, at a central part thereof) and the cabinet 110 front, so as to separate from each other and delimit, together with the liner 120, the upper 105_U and lower 105_L refrigerating compartments.
As visible in Figures 1 , 3A and 3B , the separator assembly 130 comprises a separator top 130_T, that defines a bottom of the upper refrigerating compartment 105_U, and a separator bottom 130_B, that defines a top of the lower refrigerating compartment 105_L. The representation of Figure 1 is only schematic, whereas in the representation of Figure 3B the separator top 130_T is omitted and only separator bottom 130_B is shown.
Preferably, the separator top 130_T and the separator bottom 130_B are made of materials capable of providing thermal insulation between the upper 105_U and lower 105_L refrigerating compartments.
The separator top 130_T and the separator bottom 130_B are superimposed to each other and are so shaped that one or more (e.g., two) air passages 135₁,135₂ are defined between them. The air passages 135₁,135₂ fluidly connect the lower refrigerating compartment 105_L to the liner openings 220₁,220₂, respectively, so that the refrigerating air from the lower refrigerating compartment 105_L is allowed to flow into the upper rear air channel A_CH,RU through the air passages 135₁,135₂ and the liner openings 220₁,220₂. In order to achieve that, the separator bottom 130_B comprises one or more (e.g., two) grooves 305₁,305₂ (visible in Figure 3B , showing the separator assembly 130 without the separator top 130_T ). The separator top 130_T is shaped in such a way that, when put on the separator bottom 130_B, the gap between it and the grooves 305₁,305₂ defines the corresponding air passages 135₁,135₂.
As shown in Figures 3A and 3B , both the separator top 130_T and the separator bottom 130_B preferably have the front side bent downward, so that air from the lower refrigerating compartment 105_L can easily flow in.
Moreover, the front side of the separator top 130_T preferably cooperates with the inner surface of the upper door 115_U (as shown in Figure 1 ) or of the lower door 115_L (in a possible different embodiment not shown) when such door is closed, so as to isolate the lower 105_L and upper 105_U refrigerating compartments from each other.
Refrigerating air circulation according to the invention may be summarized as follows.
Refrigerating air from the upper evaporator E_U is first fed, through the top air channel A_CH,T, into the upper refrigerating compartment 105_U, where it absorbs heat from food articles thereby allowing refrigeration thereof. Relatively hot refrigerating air within the upper refrigerating compartment 105_U is then allowed to pass through the liner openings 215₁,215₂, and hence, under fan F action, into the lower rear air channel A_CH,RL and the lower evaporator E_L housed therein.
Refrigerating air from the evaporator E_L is then fed, through the bottom air channel A_CH,B, into the lower refrigerating compartment 105_L, where, upon absorbing heat from food articles for allowing refrigeration thereof, it is fed back to upper rear air channel A_CH,RU (and hence to the upper evaporator E_U housed therein) through the air passages 135₁,135₂ and the liner openings 220₁,220₂.
Naturally, in order to satisfy local and specific requirements, a person skilled in the art may apply to the solution described above many logical and/or physical modifications and alterations. More specifically, although the present invention has been described with a certain degree of particularity with reference to preferred embodiments thereof, it should be understood that various omissions, substitutions and changes in the form and details as well as other embodiments are possible. In particular, different embodiments of the invention may even be practiced without the specific details (such as the numeric examples) set forth in the preceding description for providing a more thorough understanding thereof; on the contrary, well known features may have been omitted or simplified in order not to obscure the description with unnecessary particulars. Moreover, it is expressly intended that specific elements and/or method steps described in connection with any disclosed embodiment of the invention may be incorporated in any other embodiment as a matter of general design choice.
Moreover, analogous considerations apply if the refrigerating apparatus has a different structure or comprises equivalent components, or it has other operating features. In any case, any component thereof may be separated into several elements, or two or more components may be combined into a single element; in addition, each component may be replicated for supporting the execution of the corresponding operations in parallel. It should also be noted that any interaction between different components generally does not need to be continuous (unless otherwise indicated), and it may be both direct and indirect through one or more intermediaries.

Claims

Refrigerating apparatus (100) comprising:
a cabinet (110),

within said cabinet, first (105_U) and second (105_L) refrigerating compartments separate from each other and accessible for food storage,
wherein

the refrigerating apparatus (100) comprises a first air channel (A_CH,RU) between the cabinet (110) and a first refrigerating compartment wall (120_RU), and a second air channel (A_CH,RL) between the cabinet (100) and a second refrigerating compartment wall (120_RL), said first (A_CH,RU) and second (A_CH,RL) air channels being configured for canalizing refrigerating air into the first (105_U) and second (105_L) refrigerating compartments, respectively, and

the first refrigerating compartment (105_U) opens out to the second air channel (A_CH,RL) for allowing the refrigerating air within the first refrigerating compartment (105_U) to flow into the second refrigerating compartment (105_L) through the second air channel (A_CH,RL), and the second refrigerating compartment (105_L) opens out to the first air channel (A_CH,RU) for allowing the refrigerating air within the second refrigerating compartment (105_L) to flow into the first refrigerating compartment (105_U) through the first air channel (A_CH,RU),

wherein the refrigerating apparatus (100) further comprises:
a liner (120) delimiting said first (105_U) and second (105_L) refrigerating compartments, wherein the liner (120) has a rear wall (120_R) comprising said first (120_RU) and second (120_RL) refrigerating compartment walls and being spaced apart from a rear panel (110_R) of the cabinet (110) so as to define a rear air channel (A_CH,R) comprising said first (A_CH,RU) and second (A _CH,RL) air channels, and

a first and a second heat pump evaporators (E_U,E_L) for properly cooling the refrigerating air down to the intended refrigerating temperature, and a fan (F) for promoting refrigerating air circulation,

wherein

the first evaporator (E_U) is associated with the first (105_U) refrigerating compartment and is arranged along the first air channel (A_CH,RU);

the second evaporator (E_L) is associated with the second (105_L) refrigerating compartment and is arranged along the second air channel (A_CH,RL), and

the fan (F) is arranged along the second air channel (A_CH,RL),

characterized by the refrigerating apparatus (100) further comprising:
a separation between said first (A_CH,RU) and second (A_CH,RL) air channels preventing the refrigerating air from the first refrigerating compartment (105U) and towards the second air channel (A_CH,RL) from mixing with the refrigerating air from the second refrigerating compartment (105L) and towards the first (ACH,RU) air channel.
Refrigerating apparatus (100) according to Claim 1, wherein the liner (120) comprises, at opposite sides thereof, first (205₁) and second (205₂) protruding edges laterally delimiting said rear air channel (A_CH,R).
Refrigerating apparatus (100) according to Claim 1 or 2, further comprising a partition baffle (210) between said rear wall (120_R) and said rear panel (110_R) for partitioning the rear air channel (A_CH,R) into said first (A_CH,RU) and second (A_CH,RL) air channels, the partition baffle (210) being shaped such that at least one portion of the first air channel (A_CH,RU) extends between the second refrigerating compartment wall (120_RL) and the cabinet (110), and at least one portion of the second air channel (A_CH,RL) extends between the first refrigerating compartment wall (120_RU) and the cabinet (110).
Refrigerating apparatus (100) according to Claim 3, wherein the partition baffle (210) is made of a single piece with the liner (120).
Refrigerating apparatus (100) according to Claim 3 when dependent on Claim 2, wherein the partition baffle (210) comprises a U-shaped central portion (210_C), and, at the ends thereof, first (210₁) and second (210₂) appendices extending towards the first (205₁) and second (205₂) protruding edges, respectively.
Refrigerating apparatus (100) according to Claim 5, wherein said at least one portion of the first air channel (A_CH,RU) comprises a first portion delimited from below by the U-shaped central portion (210_C), and said at least one portion of the second air channel (A_CH,RL) comprises a second portion delimited by the U-shaped central portion (210_C), the first appendix (210₁), and the first protruding edge (205₁), and a further second portion delimited by the U-shaped central portion (210_C), the second appendix (210₂), and the second protruding edge (205₂).
Refrigerating apparatus (100) according to any Claim from 3 to 6, further comprising, at said at least one portion of the first air channel (A_CH,RU), first liner openings (220₁,220₂) for fluidly connecting the second refrigerating compartment (105_L) to the first air channel (A_CH,RU), and at said at least one portion of the second air channel (A_CH,RL), second liner openings (215₁,215₂) for fluidly connecting the first refrigerating compartment (105_U) to the second air channel (A_CH,RL).
Refrigerating apparatus (100) according to Claim 7 when dependent on Claim 7, wherein said second liner openings (215₁,215₂) comprise first (215₁) and second (215₂) openings in the second portion and in the further second portion, respectively, of said at least one portion of the second air channel (A_CH,RL).
Refrigerating apparatus (100) according to Claim 7 or 8, further comprising a separator (130) extending substantially horizontally between the rear wall (120_R) of the liner (120) and the cabinet (110) front for separating the first refrigerating compartment (105_U) from the second refrigerating compartment (105_L), the separator (130) defining at least one air passage (135₁,135₂) fluidly connecting the second refrigerating compartment (105_L) to the first liner opening (220₁,220₂) to allow air flow from the second refrigerating compartment (105_L) into the first air channel (A_CH,RU) through the at least one air passage (135₁,135₂) and the first liner opening (220₁,220₂).
Refrigerating apparatus (100) according to Claim 9, wherein the separator (130) comprises a separator top (130_T) that defines a bottom of the first refrigerating compartment (105_U) and a separator bottom (130_B) that defines a top of the second refrigerating compartment (105_L), the separator top (130_T) and the separator bottom (130_B) being so shaped as to define between them the at least one air passage (135₁,135₂).
Refrigerating apparatus (100) according to any of the preceding Claims, wherein the first (105_U) and second (105_L) refrigerating compartments comprise combinations of fridge, freezer or zero-degree compartments.