KR20070111530A - Modular refrigeration cassette - Google Patents

Abstract

The interior space within a refrigeration unit cassette (50) associated with a refrigerated merchandiser (10) is divided by a division wall (68) into a first section in air flow communication with the interior product display space of the cabinet (20), and a second section isolated from said first section and in fluid flow communication with the environment exterior of the cabinet. An evaporator module (160) disposed within the first section, and a condenser module (170) and a compressor are disposed within the second section. The refrigeration cassette (50) is selectively insertable in to and out of the equipment compaitulent to facilitate servicing of the refrigeration equipment therein, including removal and replacement of the evaporator module (160) and the condenser module (170).

Description

Modular Refrigeration Cassette

<Cross Reference of Related Application>

See US Provisional Application No. 60 / 663,112, filed Mar. 18, 2005 and entitled "Modular Refrigeration Cassette Design for Use in Refrigerated Showcases," which is incorporated herein by reference in its entirety. Enjoy priority and provisions from provisional applications;

This application is assigned to the co-assignee of this application and filed with the U.S. Patent and Trademark Office on the same date as the present application, that is, international patent application No. PCT / US05 / (representative list 210_817PCT) entitled "Cold Showcase". ); International Patent Application No. PCT / US05 / (Agent List 210_816PCT) entitled "Sealing System for Refrigerated Cassettes"; International Patent Application No. PCT / US05 / (Agent List 210_879PCT) entitled "Modular Refrigeration Cassette with Condensation Evaporation Tray"; International Patent Application No. PCT / US05 / (Agent List No. 210_818PCT) entitled “Bottom Bottom Plate Assembly for Refrigerated Showcase”; And International Patent Application No. PCT / US05 / (Agent List 210_819PCT) entitled "Evaporator Fan / Motor Assembly Mounting Bracket". Each of the foregoing patent applications is hereby incorporated by reference in its entirety.

FIELD OF THE INVENTION The present invention relates generally to refrigerated showcases, and more particularly to refrigerated showcases comprising refrigeration units mounted in compartments separate from the refrigerated internal product space of the refrigerated cabinet.

The refrigerated showcase has a refrigeration system associated therewith to provide a cooling environment in the refrigerated internal product space defined in its cabinet. The refrigeration system of such refrigerated showcases generally employs known Carnot refrigeration cycles, and evaporator and evaporator fans which are operatively combined with condenser, condenser fan and compressor, as well as the refrigerated internal product space of the refrigerated cabinet. It includes. In a standalone cabinet, the compressor, condenser and condenser fan are housed in an equipment compartment that is separated and insulated from the refrigerated internal product space of the refrigerated cabinet. The refrigerant line connects the compressor, condenser and evaporator in a conventional manner to form a closed circuit. The refrigerant is circulated by the compressor through the condenser and evaporator before returning to the compressor. Air in the adiabatic refrigerated internal product space of the refrigeration cabinet is circulated and cooled by the evaporator fan through the evaporator in a heat exchange relationship with the refrigerant. The evaporator and the evaporator fan may be arranged in the cooled interior of the refrigeration cabinet, for example in its upper region.

However, it is known that evaporator and evaporator fans may also be housed in equipment compartments in sections of equipment compartments insulated from compressors, condensers and condenser fans. Among other uses, this type of refrigerated showcase can be used as a product display cabinet for refrigerated or frozen food, as a vending machine and as a cold beverage showcase in supermarkets, grocery stores, gas stations, convenience stores and other retail facilities. For example, cold beverages such as soft drinks, beer, wine coolers and the like are commonly displayed in refrigerated display cases for self-service purchases by customers. Conventional beverage showcases of this type include an insulating cabinet with one or more glass doors that define a refrigerated internal product display space and provide access to the product display space. Typically, beverage products in cans or bottles are stored in the form of only one or six-packs on shelves in the refrigerated display space of the cabinet. To purchase a drink, the customer opens one of the doors and reaches out into the refrigerated cabinet to find the desired product from the shelf.

US Pat. No. 5,347,827 to refrigerated showcases having refrigeration units disposed under refrigerated cabinets, for example to Ludick et al .; 5,402,654; 5,402,654; No. 5,417,079; And 5,417,081. In these refrigerated showcases, the refrigerated air from the refrigeration unit flows upwards from the equipment compartment through the flow duct along the rear wall of the cabinet, along the top wall of the cabinet towards the front of the cabinet and from the front of the cabinet. Flow down to the bottom of the area. Refrigerated air may also enter the product display area from the rear flow duct through a plurality of openings in the panel that separate the flow duct from the product display area. The refrigerated air from the product display area enters upstream of the evaporator refrigeration unit through an air return inlet that opens through the cabinet bottom and returns to the equipment compartment.

The disclosed refrigeration unit includes therein an evaporator, a condenser and a compressor, arranged collectively on the base, supported on a plurality of skids attached to the bottom of the base. The compressor and the condenser are located on the front part of the base and are separated from the evaporator by an insulated vertical bulkhead disposed therebetween. The evaporator is placed above an evaporator fan that collects condensed water from the air passing through it. The collected water is drained out of the evaporator fan into a shallow condenser fan located on the bottom of the base in the exhaust path of the condenser fan, whereby the hot air exhausted from the condenser passes over the condenser fan and the water collected therein Evaporate.

In refrigerated showcases with air passages in the wall separating the refrigerated internal product space from the equipment compartment, undesirable leaking liquids and other contaminants can enter the refrigeration unit during operation, inspection and repair or transport. Leaking liquid drained from the product display area to the refrigeration unit through the air inlet openings can contaminate or otherwise damage refrigeration units such as evaporator heat exchanger coils, motors and fans. Leaking liquid may damage the surface that contacts the airflow path through the refrigeration unit. Leaking liquid can result from product breakage, cleaning and maintenance operations, or condensation in the product display area.

There is a need for a refrigerated cassette, in which the cassette is configured to handle leaking liquid and to condense without damaging the refrigeration unit components or surfaces. The refrigeration cassette should also be suitable and easy to use for modular refrigeration unit parts.

It is an object of the present invention to provide a refrigerated cassette having improved reliability and inspection and repair capability.

It is an object of one embodiment of the present invention to provide a refrigerated cassette configured to drain liquid leaks from a susceptible refrigerant unit component.

It is an object of one embodiment of the present invention to provide a refrigerated cassette incorporating a liner having an outer surface for improved airflow.

It is an object of one embodiment of the present invention to provide a refrigerated cassette incorporating a liner formed of a material having improved chemical resistance.

It is an object of one embodiment of the present invention to provide a refrigeration cassette configured to be suitable and easy to use for modular refrigeration unit components.

Modular refrigeration cassettes are provided for refrigerated showcases with cabinets having refrigerated interior spaces for storing the product in a refrigerated environment intended for selection by the consumer. The refrigeration cassette is disposed in operative coupling with the interior space of the equipment compartment separated from the interior space refrigerated by a common wall. The common wall has a first opening therein that provides airflow communication between the refrigerated interior space and the equipment compartment. The refrigeration cassette includes a generally boxed structure that defines an interior space having a first section in air flow communication with the first opening and a second section isolated from the first section and in fluid flow communication with an environment outside of the cabinet. In one embodiment, the box-like structure includes a front plate, a back plate, a pair of side plates and a base plate collectively defining the interior space, and dividing the interior space in the box-like structure into first and second sections. A splitting wall extending between each sidewall. The evaporator module is disposed in the first section. The condenser module and the compressor are arranged in the second section. The compressor is connected in refrigerant flow communication with the evaporator module and the condenser module to circulate the refrigerant through the evaporator module and the condenser module. The box structure can be selectively inserted into and out of the equipment compartment.

The evaporator module may include a housing, an evaporator coil disposed within the housing, and an evaporator fan / motor assembly operatively coupled to and mounted to the evaporator coil. The condenser module can include a condenser coil and a condenser fan / motor assembly operatively coupled with the condenser coil.

The liner may be disposed in a first section of the interior space of the refrigerated cassette, the liner comprising a bowl-shaped recess adapted to receive the evaporator module. The liner may have an outer surface to reduce airflow loss and may be made of plastic or other material with high chemical resistance.

For further understanding of these objects of the present invention, reference will now be made to the following detailed description of the invention which should be read in conjunction with the accompanying drawings.

1 is a side cross-sectional view of a refrigerated showcase equipped with a modular refrigerated cassette.

2 is a side cross-sectional view taken along line 2-2 of FIG.

3 is a perspective view of an embodiment of a modular refrigeration cassette according to the present invention.

4 is a side cross-sectional view of the modular refrigeration cassette shown in FIG.

5 is a plan view taken along section 5-5 of FIG.

6 is a perspective view illustrating an embodiment of a liner for the modular refrigerated cassette shown in FIG.

Referring now to FIGS. 1 and 2, in particular, an internal product display space 100 for holding products 110 to be purchased, such as, for example, bottle or can soda, milk, water, juice, fruit drinks, beer, and other beverages, and the like. A chilled cold beverage showcase 10 comprising a is shown. While the present invention will be described herein with reference to the illustrated embodiment of the chilled cold beverage showcase, the present invention is intended to be maintained in a controlled environment, for example livestock meat, poultry meat, fish, dairy products, packaged frozen food and It should be appreciated that the invention may be applied to other refrigerated display showcases displaying perishable and frozen foods and beverages, including other products.

The beverage showcase 10 is disposed separately from the refrigerated internal product display space 100 and the refrigerated internal product display space 100 and has a separate equipment compartment in which heat transfer can be blocked from the refrigerated internal product display space 100. A cabinet 20 housing 55. The cabinet 20 has an enclosing sidewall structure comprising an upper wall 22 and a rear wall 34, a front wall 32 and opposing and generally vertically extending sidewalls 36, 38. The cabinet also includes a lower wall 24 disposed between the refrigerated interior product display space 100 located at the top and the equipment compartment 55 located at the bottom. The interior product display space 100 may be accessed through an access opening that is an open area in front of the cabinet in the embodiment shown from the outside of the cabinet 20. This open area may be covered as in the embodiment shown by at least one door 40 that is open to the surrounding environment or mounted to the cabinet 20. The door 40 extends across the open area and has a transparent viewing area, such as a glass panel, where at least a portion of the interior product display space 100 can be observed. The door 40 can be selectively positioned between a closed position that covers the open area and an open position where the consumer can access the internal product display space 100 to move the product for purchase. Although the embodiment of the display showcase 10 shown in the figures has only one door 40, the display showcase may have one, two and three or more doors collectively covering the open area when in the closed position. You should know that you can. The door or doors 40 may be mounted to the cabinet 20 in a conventional manner, for example on a hinge for pivotal movement between open and closed positions or on a track for sliding movement between open and closed positions. .

In the illustrated embodiment, the upper wall 22, lower wall 24, rear wall 34 and sidewalls 36, 38 are refrigerated internal product display space 100 from an environment outside the internal product display space 100. Heat transfer is cut off to insulate it. A plurality of shelves 112 are disposed within the interior product display space 100. Shelf 112 is adapted to support a particular product to be displayed for purchase. The particular number, arrangement and configuration of the shelves 112 is not closely related to the present invention and is within the general discretion of one of ordinary skill in the art for selecting a particular product to be displayed.

The rear panel 134 is provided spaced inwardly of the rear sidewall 34 to partially establish the refrigerated air supply duct 104 between the rear sidewall 34 and the rear panel 134. The interior product display space 100 in the refrigerated interior of the display cabinet 20 is defined by the top wall 22, the bottom wall 24, the side walls 36, 38 and in part by the respective rear wall 34 and The boundary is defined by the back panel 134. In the illustrated embodiment, the refrigerated air is partially inside the air outlet 109 at the upper end of the air supply duct 104 and partially through the plurality of openings 135 provided in the rear panel 134. Enter into the product display space 100 to cool the products displayed in the. The refrigerated air exits from the product display space 100 through the opening 102 provided in the lower wall 24.

The equipment compartment 55 is located in the cabinet 20 below the bottom wall 24 and is separated by the bottom wall 24 from the refrigerated internal product display space 100 of the cabinet 20. The bottom wall 24 forms a common wall separating the refrigerated interior space and the equipment compartment. The bottom wall has a top surface that forms the bottom or bottom plate of the interior product display space and has a bottom surface that faces the refrigeration unit cassette 50 of the refrigeration unit 15 housed in the equipment compartment. The refrigeration unit 15 comprises an evaporator module 160, a condenser coil 70 and at least one comprising an evaporator coil 60 and at least one combined evaporator fan / motor assembly 62 disposed within the housing 61. A condenser module 170 comprising a condenser fan / motor assembly 72 and a compressor 74. The evaporator coil 60 and its associated evaporator fan / motor assembly 62 are housed in a first section 53 of the refrigeration unit cassette 60, the first section 53 being the condenser coil 70 and its The combined condenser fan / motor assembly 72 and compressor 74 are separated by a split wall 68 from the second section 57 of the refrigeration unit cassette 50 in which it is housed. The first section 53 of the refrigeration unit cassette 50 is sized to accommodate a range of evaporator modules 160 having different capacities, and the second section 57 of the refrigeration unit cassette 50 has different capacities. It is shaped to accommodate a range of condenser modules 170, thereby ensuring that a given cassette design can be used over a relatively wide range of refrigeration capacities.

Referring now also to FIGS. 3, 4 and 5, the refrigeration cassette 50 comprises a generally rectangular box-like structure defining an interior space, which box-shaped structure comprises an upper flange 52, a base plate 54 And an enclosing wall structure 56 extending generally vertically between the upper flange 52 and the base plate 54 and formed of the front plate 56A, the rear plate 56B and the opposing side plates 56C. The dividing wall 68 opposes the interior of the refrigeration unit cassette 50 from the upper front region of the cassette 50 to the rear plate 56B for separating the first section 53 and the second section 57 described above. It extends between the side plates 56C. Condenser coil 70, its associated condenser fan / motor assembly 72 and compressor 74 are mounted to base plate 54 which forms the bottom of cassette refrigeration unit 50. The condenser coil and its associated condenser fan / motor assembly may be mounted to a common support plate intended to be mounted to base plate 54, thereby forming condenser module 170. In order to facilitate the inspection and repair of the refrigeration equipment therein, including the removal and replacement of the evaporator module 160 and the condenser module 170 as separate units, the cassette 50 is inserted into and out of the compartment 55. To facilitate placement, a base plate 54 is slidably mounted in the partition 55. Condensate tray 76 may be provided to collect the dripping condensate from evaporator coil 60. The condensate tray 76 serves as a condensate evaporation tray where the condensate collected therein is evaporated by the hot air as the hot air exhausted from the condenser passes over the condensate tray 76.

Evaporator coil 60, condenser coil 70 and compressor 74 are closed loop refrigerant circulation circuits (not shown) in a conventional manner to cool air from internal product display space 100 through known Carnot cycles. Not coupled). The condenser fan / motor assembly 72, which is typically a single fan and motor, is provided at the front of the lower front wall 32 of the cabinet 20, from the outside of the refrigerated showcase 10, such as its external surroundings, for example. Through the grille 12, through the openings 59 provided in the front plate 56A of the cassette 50, and over the condenser coil 70, typically only when the compressor 74 is in operation. It is possible to operate. As the outside air passes over the condenser coil 70 in a heat exchange relationship with the refrigerant passing through the condenser coil by the compressor 74, the refrigerant is cooled and the air is heated. The hot air crosses the condenser coil 70 and then partitions back to the outside environment through an exhaust channel 77 formed below the first section 53 in the rear portion of the second section 57 of the cassette 50. It is exhausted to the outside of 55. Some of the air introduced through the cassette 50 by the condenser fan passes over the compressor 74 to help cool the compressor.

The cooled refrigerant is circulated from the condenser coil 70 to the evaporator coil 60 through a closed loop refrigerant circulation circuit (not shown). The evaporator fan / motor assembly 62, which may be a single fan and a plurality of fans having a motor or combined motor, is divided into the evaporator compartment through the air return inlet opening 102 of the lower wall 24 from the interior product display space 100. Air is drawn into the first section 53 of the refrigeration unit 50, also referred to as negative, and then the air passes over the evaporator coil 60 to the refrigerated air supply duct 104 and to the refrigerated air supply duct. It is operable to return to product display space 100 through 104. As the circulating air passes over the evaporator coil 60, the air is cooled in a heat exchange relationship with the cooled refrigerant circulated through the evaporator coil 60 by the compressor 74, and the refrigerant is heated and evaporated. Evaporator fan 62 is supplied from the evaporator compartment 53 to the refrigerated internal product display space 100 and through the return air outlet 108 located in the lower wall 24 behind the rear panel 134. The refrigerated air is circulated again across the evaporator coil 60 to the duct 104.

The cover plate 120 is disposed above the return air inlet 102 in a very spaced relationship with the lower wall 24 to form a flow path between the cover plate 120 and the lower wall 24, through which the flow path is located. Refrigerated air returning from the product display space 100 flows to the air return inlet 102. The cover plate 120 covers the air return inlet 102, whereby refrigerated air is introduced so that the refrigerated air directed downwards passes under the cover plate 120 to the air return inlet 102 of the lower wall 24. As it approaches the lower area of the product display space 100, it flows outwardly toward the enclosure wall of the cabinet. In doing so, the refrigerated air passes through the product to cool the product on its lower shelf more evenly and prevent the refrigerated air from directly converging directly to the return air return inlet 102. The cover plate 120 also limits the flow of leakage or leakage from the product in the product display space 100 to flow directly into the evaporator compartment 53 to contaminate the evaporator and / or evaporator fan assembly.

In one embodiment, the cover plate 120 extends substantially vertically from there to the lower wall 24 to support the cover plate 120 above the air return inlet 102 of the lower wall 24. 126. A plurality of circumferentially spaced openings 125 for forming an air passage connecting the refrigerating internal space 100 in flow communication with the air return inlet 102 to the evaporator compartment 53 of the refrigeration unit cassette 50. Is provided on the circumferential flange 126.

The divider plate 68 has a front portion 68A and a rear portion 68B. The rear portion 68B of the splitter plate 68 extends generally horizontally above the base plate 54 to form a channel 77 in a spaced apart relationship below the evaporator assembly and in the rear portion of the condenser compartment 57. Channel 77 is an exhaust channel through which hot air from condenser coil 70 exits the environment outside of refrigerated showcase 10 through an opening in the rear of cabinet 20 to the exterior of equipment compartment 55. Configure. Condenser coil 70, its associated condenser fan / motor assembly 72 and compressor 74 are mounted to the front portion of base plate 54. The front portion 68A of the splitter plate 68 is inclined downward from the upper front region of the condenser compartment 57 to meet the rear portion 68B of the splitter plate 68. By doing so, a converging channel 73 extending from the outlet of the condenser 70 is defined between the base plate 54 and the front portion 68A of the splitter plate and opens to the exhaust channel 77. Converging channel 73 substantially defines a nozzle that accelerates the condenser exhaust airflow through it to a relatively high speed, which is significantly higher than the speed of condenser exhaust airflow coming from condenser module 170. The front section 68A of the splitter plate 68 is shown as having two sections of different slopes. However, it should be appreciated that the front section 68A of the splitter plate 68 may have a constant slope or even a curved slope as needed.

Condensate dripping from the evaporator coil 60 disposed in the rear portion of the evaporator compartment 53 passes through the exhaust channel below the evaporator compartment 53 via a drain tube 89 passing therefrom through the dividing wall 68. Drained to the condensate tray 76 disposed in 77, the condensate dripping from the evaporator 60 is collected. Condensate tray 76 may be integrally formed within base plate 54. For example, the condensate tray 76 may be defined by a raised edge 78 stamped on the base plate 54 as shown in FIGS. 4 and 5. Alternatively, the condensate tray 76 may be a separate structure that is secured to the base plate 54. For example, the condensate tray 76 may be defined by raised edges 78 stamped or otherwise formed in the base plate 54 as shown in FIGS. 4 and 5. Alternatively, the condensate tray 76 may be a separate insert that is secured to the base plate 54. In this case, the condensate tray may be formed of a material different from the base plate, such as non-metallic materials such as ABS plastic, or may be formed differently from aluminum or other metal materials.

Condensate pan 72 introduces ambient air through condenser coil 70 to absorb heat from the refrigerant passing through the condenser coil to condense the refrigerant as in the prior art. Hot air exiting the condenser 70 accelerates as it passes through the converging channel 73 and into the exhaust channel 77. The high speed hot air passing through the exhaust channel 77 passes over the surface of the condensate collected in the condensate tray 76. The high speed characteristic of the hot air passing through the exhaust channel 77 improves the evaporation of condensate collected in the condensate tray 76 as the evaporation rate of the condensate is increased due to increased air to condensate contact.

Referring now to FIGS. 3, 4, and 6, in particular, the structure of the refrigeration unit cassette 50 from chemical erosion by liquid that may leak or flow into the cassette from the product display area 100. It may be inserted into the evaporator compartment 53 to protect the surface of the metal plate to form a. The plastic liner 80 consists of a molded body having a flange 82 extending circumferentially around it, a bottom portion 84 inclined downward at its front end and a bowl-shaped recess 86 at its rear end. . The plastic liner 80 is formed such that the flange 82 is fitted in the partition 53 adjacently on the partition wall 68 with the flange 82 supported on the upper flange 52 of the cassette 50. The bowl-shaped recess 86 consists of an evaporator 60, its housing 64 and one or more evaporator fan / motor assemblies 62, each mounted to the evaporator housing 64 by a support bracket 66. 65 is to be accommodated. The evaporator module 160 is releasably secured to the side of the liner 80 and / or the side wall 56C of the refrigeration unit cassette 50, for example by bolts or screws. The bowl-shaped recess 86 is shaped to accommodate a range of evaporator modules of different capacities, thereby allowing a given refrigeration cassette to be used over a wide range of refrigeration capacities. It should be appreciated that the liner 80 may be formed from a non-plastic molding material that is more chemically resistant than the metal walls of the refrigerated cassette 50 and is of sufficient strength to support the evaporator module, such as glass fibers, for example.

The plastic liner 80 is contoured to have a generous radius to minimize airflow loss as the refrigerated air passes from the product display area 100 through the evaporator 60 and into the refrigerated air supply duct 104. Alternatively, grooves 88 may be formed in the inclined bottom 84 of the liner 80 to collect and direct any liquid that may leak or flow into the refrigeration unit cassette 50.

A sealing member 58 located between the lower wall 24 and the refrigeration cassette 50 and the lower wall 24 separating the refrigerated internal product display space 100 from the equipment compartment 55 in the exemplary embodiment. A sealing system is provided that includes a positioning device 150 for positioning the refrigeration unit cassette 50 in a sealing relationship with a common wall. The sealing system includes refrigerated air returning from the product display space 100 to the refrigeration unit 15 bypasses the evaporator 60 and instead the inlet 108 from the air return inlet 102 to the air supply duct 104. To prevent direct flow. The sealing system also allows ambient air from the outside of the refrigeration unit cassette 50 such as ambient air introduced to pass through the condenser 70 through the front grille 12 to the air return inlet 102 of the lower wall 24. It is prevented from entering the refrigerated air returning to the refrigeration unit (15) through.

The sealing member 58 may be mounted to the lower surface of the lower wall 24 around the opening 102 in the lower wall 24 or may be mounted to the upper surface of the upper flange 52 of the refrigeration unit cassette 50 or It can simply be supported at its surface. The sealing member 58 extends at least around the opening 51A to the refrigeration cassette 50 as shown in FIG. 3, which opening 51A is substantially the same size as the opening 102 of the lower wall 24. It is in fluid communication with the opening 102. The sealing member 58 may also extend around the opening 51B provided to the rear of the opening 51A which is open in flow communication with the opening 108 of the lower wall 24 as shown in FIG. 3. . In the illustrated embodiment, the sealing member 58 takes the form of a rectangular frame extending along the upper flange 52 with the cross member 58A extending along the top of the housing 64 of the evaporator module 60. Take it.

The sealing member 58 is on the refrigeration unit cassette 50, which is compressed against the lower wall 24 when the cassette refrigeration unit 50 is raised in the partition 55 by the operation of the positioning device 150. It may include one or more compressible seals provided in. However, the sealing member 58 is refrigerated to provide a desired sealing arrangement therebetween when the cassette refrigeration unit 50 is positioned by the operation of the lifting device 150 to intervene the sealing member 58 therebetween. It may also include one or more incompressible seals, such as a contact seal that separates the refrigerated interior space from the unit cassette and the equipment compartment and interacts with each opposing surface of the common wall surrounding each opening therein.

The refrigeration cassette of the present invention has been described herein with reference to the exemplary embodiments shown in the drawings for purposes of explanation and to facilitate understanding of the present invention. Those skilled in the art should recognize that modifications as set forth above can be made to the illustrated embodiments without departing from the spirit and scope of the invention.

Claims (20)

A refrigerated cassette for a refrigerated showcase having a cabinet having a refrigerated internal space for storing the product in a refrigerated environment, intended for selection by the consumer, the refrigerated cassette being equipment separated from the internal space refrigerated by a common wall. The common wall has a first opening therein that provides airflow communication between the refrigerated interior space and the equipment compartment, the refrigeration cassette having A generally box-shaped structure defining an interior space having a first section in air flow communication with the first opening and a second section isolated from the first section and in fluid flow communication with an environment outside of the cabinet; An evaporator module disposed in the first section, A condenser module disposed in the second section, A compressor connected in refrigerant flow communication with the evaporator module and the condenser module to circulate the refrigerant through the evaporator module and the condenser module; And the box-like structure selectively insertable into and out of the equipment compartment. The refrigeration cassette of claim 1, wherein the evaporator module comprises a housing, an evaporator coil disposed within the housing, and an evaporator fan / motor assembly operatively coupled to and mounted to the evaporator coil. The refrigerated cassette of claim 1 wherein the condenser module includes a condenser coil and a condenser fan / motor assembly operatively coupled to the condenser coil. The refrigerated cassette of claim 1 further comprising a liner disposed within the first section of the interior space of the box-like structure, the liner comprising a bowl-shaped recess adapted to receive the evaporator module. 5. The refrigerated cassette of claim 4, wherein the liner comprises a rear portion having a downwardly inclined tray-shaped front portion and a bowl-shaped recess. 6. The refrigerated cassette of claim 5, wherein the liner has an outer surface for reducing airflow loss. The refrigerated cassette of claim 4 wherein the liner is made of a material having a relatively high chemical resistance. The refrigerated cassette of claim 4, wherein the liner is made of a plastic material. A refrigerated cassette for a refrigerated showcase having a cabinet having a refrigerated internal space for storing the product in a refrigerated environment, intended for selection by the consumer, the refrigerated cassette being equipment separated from the internal space refrigerated by a common wall. The common wall has a first opening therein that provides airflow communication between the refrigerated interior space and the equipment compartment, the refrigeration cassette having A generally boxed structure having a front plate, a rear plate, a pair of side plates and a base plate collectively defining an interior space, Between each side plate of the pair of side plates, to divide the interior space in the box-like structure into a first section in air flow communication with the first opening and a second section isolated from the first section and in fluid flow communication with the environment outside of the cabinet. With dividing wall extending, An evaporator module disposed in the first section, A condenser module disposed in the second section, A compressor connected in refrigerant flow communication with the evaporator module and the condenser module to circulate the refrigerant through the evaporator module and the condenser module; And the box-like structure selectively insertable into and out of the equipment compartment. 10. The refrigeration cassette of claim 9, wherein the evaporator module comprises a housing, an evaporator coil disposed within the housing, and at least one evaporator fan / motor assembly operatively coupled to and mounted to the evaporator coil. 10. The refrigeration cassette of claim 9, wherein the condenser module includes a condenser coil and a condenser fan / motor assembly operatively coupled to the condenser coil. 10. The refrigerated cassette of claim 9, further comprising a liner disposed in the first section of the interior space of the box-like structure, the liner comprising a bowl-shaped recess adapted to receive the evaporator module. 10. The refrigerated cassette of claim 9, wherein the liner includes a rear portion having a downwardly inclined tray-shaped front portion and a bowl-shaped recess. The refrigerated cassette of claim 13, wherein the liner has an outer surface for reducing airflow loss. 13. The refrigerated cassette of claim 12, wherein the liner is made of a material having a relatively high chemical resistance. 13. The refrigerated cassette of claim 12, wherein the liner is made of a plastic material. Refrigerated showcases with refrigerated interior spaces, A cabinet having a plurality of walls defining an interior space, A refrigeration unit compartment separated from the interior space by one of the plurality of cabinet walls as a common wall, An opening in the common wall that provides an air return inlet that establishes a flow passage from the interior space to the compartment through the common wall; Having a front plate, a rear plate, a pair of side plates and a base plate forming a box-shaped structure defining an interior space, the interior space being isolated from the first section and the first section in airflow communication with the air return inlet and the outside of the cabinet A refrigerated cassette having a dividing wall for dividing into a second section in fluid flow communication with an environment of An evaporator module disposed in the first section, A condenser module disposed in the second section, A compressor connected in refrigerant flow communication with the evaporator module and the condenser module to circulate the refrigerant through the evaporator module and the condenser module; Refrigerating showcases included. 18. The refrigerated showcase of claim 17, wherein the evaporator module comprises a housing, an evaporator coil disposed within the housing, and at least one evaporator fan / motor assembly operatively coupled to and mounted to the evaporator coil. 19. The refrigerated showcase of claim 18, wherein the condenser module includes a condenser fan / motor assembly mounted to a common base adapted to be mounted to the condenser coil and the base plate of the refrigerated cassette and operatively coupled to the condenser coil. 18. The refrigerated showcase of claim 17, wherein the evaporator module comprises a housing, an evaporator coil disposed within the housing, and a plurality of evaporator fan / motor assemblies operatively coupled to and mounted to the evaporator coil.

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