CZ20012962A3 - Improvement in multiple cooling zones - Google Patents

Abstract

The invention is embodied in a refrigeration unit (R) adapted for use in combination with plural associated refrigerated fixtures (33a, 33b, 33c) in a commercial store, each fixture having a product zone and heat transfer cooling means (29) for the refrigeration thereof and which refrigeration unit comprises housing means (55, 57) with a mounting profile constructed to be accommodated substantially within the footprint area of one of said associated fixtures and arranged to support selective refrigeration components of a closed refrigeration circuit for supplying the refrigeration requirements of all associated fixtures, and which components include plural vapor phase compressor means (21) and a closely coupled coolant loop connected with the heat transfer cooling means.

Description

Improvement in multiple cooling zones

Technical field

The invention relates to commercial refrigeration products, in particular to refrigeration units which are used to cool a plurality of cooling zones.

Related Applications:

The present invention encompasses the subject of the invention together with European patent application 94915916.4, filed April 26, 1994 under the title "Strategy Modular Refrigeration System" - based on US patent application 08 / 057,617 - granted US patent 5,440,894 on August 15, 1995 ) and also together with European Patent Application 97917750.8 filed April 2, 1997 under the title "Strategic Modular Secondary Refrigeration" (based on US Patent Application 08 / 632,219 - issued US Patent 5,743,402 on April 28, 1998).

BACKGROUND OF THE INVENTION

A modular commercial refrigeration unit designed and arranged to be placed in strategic proximity to a plurality of connected cooling zones of products is known in the art and is disclosed in U.S. Pat. No. 5,440,894, owned by Hussmann Corporation, the contents of which are incorporated herein by reference. This document discloses a refrigeration and food storage system for supermarkets comprising a refrigeration unit, as well as a refrigeration network comprising a plurality of such units. The unit disclosed in U.S. Pat. No. 5,440,894 (after the trade mark "PROTOCOL") is intended for food stores for cooling zones in fixed boxes placed on the sales area (for advertising and exhibition area, for food storage and preparation area)

The cooling unit comprises a condensing unit arranged and positioned on a shelf to accommodate the maximum cooling load of the attached zones, while being designed to accommodate components of the closed cooling circuit, including several compressors and associated high and low side refrigerant delivery means, a suction device extending from the shelf and associated with an evaporator constructed and arranged to smooth the associated zones, said unit also comprising an iva source remote from the compressor shelf, but designed and arranged to provide heat exchange and optimum condensation and efficiency of said evaporator connected zones.

Also known is another modular commercial refrigeration unit which is designed and arranged for strategic location near a plurality of connected cooling zones. This unit is listed in U: S. No. 5,743,102 to Hussmann Corporation, which is incorporated herein by reference. This prior art document discloses refrigeration of stored foodstuffs comprising a refrigeration unit and a refrigeration system. The unit disclosed in U.S. Pat. No. 5,743,102 (sold under the name "PROTOCHILL") is used to cool product and storage areas for advertising boxes, as well as to cool stable boxes. The unit includes a shelf of a condensing unit arranged to accommodate the maximum cooling load of attached fixed box zones, and further designed to accommodate components of a closed refrigeration system with multiple compressors and an evaporator with a high side and a low side of the refrigerant supply, as well as suction means connected to the evaporator, said unit also comprising a condenser connected between the compressor and the evaporator as a component cooling unit, wherein the unit is also designed to accommodate a liquid refrigerant system with a heat transfer means connected to the evaporator, and a pump for circulating the refrigerant through the heat transfer means in a closed cooler. to the cooling worms of connected fixed devices.

An important target of the unit disclosed in U.S. Pat. Nos. 5,440,894 and 5,743,102 were finding ways to minimize the amount of refrigerant needed in the grocery cooling network.

Another object of the unit disclosed in U.S. Pat. Nos. 5,440,894 and 5,743,102 were to avoid the need to provide a specialized and separate room with equipment, thereby freeing up the necessary space in the supermarket for other purposes.

In practice, some traders have been hesitant to install PROTOCOL and PROTOCHILL anywhere on the warehouse floor, losing many of the benefits provided by the equipment.

It is an object of the invention, according to at least one aspect of the present invention, to address one or more of the known problems of the units disclosed in U.S. Pat. Nos. 5,440,894 and 5,743,102.

Another object of the invention was to provide a unit that would not occupy any floor area of a shop.

Another problem was, according to at least one aspect of the invention, to address the units and their objectives set forth in U.S. Pat. 5,440,894 and 5,743,102. Other objects and advantages of the unit according to the invention will be apparent from the description given later.

Some of these advantages provided in the currently preferred embodiments of the invention are:

···· · ··············

- 3 - Low noise and vibration levels, providing two or more compressors to gain capacity control and backup safety.

a relatively short pipe length, which allows to reduce the required capital and current costs and installation time, a relatively simple cooling circuit.

reduced refrigerant and acquisition costs, reduced refrigerant gas losses and associated leakage costs, flexibility in future improvements, heat recovery from fluid loops, providing energy efficiency benefits and improved cooling system / network efficiency,

- Low profile benefits for trouble-free mounting on the top of the stable box cooling zone

SUMMARY OF THE INVENTION

According to a first aspect of the present invention there is provided a cooling unit adapted to cool a plurality of cooling zones, for example, as a combination of countertop cooling and a plurality of stable boxes, said unit comprising cooling circuit components with a tightly coupled compressor unit; on a footprint of a surface similar to that of a cool box cooling zone. The term "cooling zone trace" means the floor area occupied by a refrigerated stable box, as is evident from the above (or further described)

The unit can be used in grocery stores, such as supermarkets, etc.

The term "cooling zone" means the area of refrigerated products, or refers to the bottom surface of a counter, a warehouse or a storage cabinet and a stable box

The one or more food cabinets may be arranged in a row, back to back, or close together

It is preferred that the unit is located on top of one cooling zone of the product (stable box). The compressor unit comprises two or more compressors whose performance is increased by parallel connection in the cooling circuits, while compressors with horizontal cooling fins are preferred. advantage of a low-profile unit, which can be conveniently or strategically placed on a stable box, is designed and arranged to cool a plurality of cooling zones at least two closely

-4-; Such stable compressors are available on HITACH1 under the brands FL 200DL, FL 300DL, FL 400DL and FL 500DL. Alternatively, a vertical type compressor can be used.

According to a preferred embodiment of the present invention, the modular low-profile refrigeration unit is designed to accommodate the maximum refrigeration load of at least two product cooling zones located on the grocery store area, the unit comprising closed refrigeration circuit components including a plurality of compressor units and associated supply units high side means and low side suction means wherein the unit is designed and arranged to be operable near the product cooling zones while being connected to an evaporator of the respective zones, and wherein the cooling circuit also includes a condenser.

The condenser may be a condenser located in a unit that may be connected with a remote cooling source to provide heat exchange with the condenser.

The remote cooling source may be a liquid cooling source, such as a cooling tower or an underground cold water source, or a dedicated conventional cooling system, a recirculating water source, or a combination of such liquid cooling sources, to provide a constant constant temperature liquid refrigerant source.

Alternatively, the condensation means may comprise a condenser which is remote from the unit and has a heat exchanger cooling source which may be cooled by, for example, air.

If the condenser is located on or off the chiller plate, it may include a heat regenerator, which may be of the direct type or may be a heat pump.

According to a second aspect of the present invention, there is provided a cooling system comprising at least one cooling unit according to the first aspect of the present invention. The cooling unit of the system cools the cooling zones of at least two stable boxes while the unit is located at the bottom of at least one of the stable boxes.

According to a preferred embodiment of the second aspect of the invention, the system comprises a modular food store refrigeration system comprising a plurality of cooling zones for at least two refrigerated stable boxes placed side by side at the first store location, a separate first stage evaporator located at the second store location; this is in the vicinity of the first location of the refrigerated stable boxes, where a constant temperature favorable for food storage is maintained, wherein the compressor unit comprises several first stage compressors occupying a second location near the first location of the refrigerated stable boxes; first stage compressors; and

Said first stage evaporator means forming a closed loop of the first stage cooling circuit, further comprising an external heat exchanger and a closed loop of a liquid heat exchanger located between the first stage of the first stage cooling and an external heat exchanger to transfer heat from the first condensing means degrees to the external heat exchanger.

According to a third aspect of the invention, there is provided a cooling network comprising at least one cooling unit according to the first aspect of the invention.

According to a preferred embodiment of the third aspect of the invention, said network comprises:

a first modular cooling system unit according to the second aspect of the present invention, which is located near the first cooling zone and comprises components of a first closed refrigeration circuit including a plurality of compressor units with high side input (receiving) means associated with high refrigerant supply and intake means; a low side connecting the first evaporator for cooling the first cooling zone, wherein the first cooling unit also includes a first condenser connected to the high side downstream of the compressor;

at least one modular cooling system unit located adjacent the coupled additional cooling zones and including the other components of the closed cooling circuit, including additional compressors with attached refrigerant supply and high and low side suction units that connect additional evaporators to cool additional cooling zones wherein the additional cooling unit also includes additional condensers connected to the high side downstream of the other compressors, wherein said network may include respective condensation means and a refrigerant circulation system and a plurality of heat exchange circuits relative to respective first and additional condensation means for the respective first and further condensers. cooling system units, wherein the refrigerant circulation system comprises at least one continuous refrigerant source in said circulation system

According to a fourth aspect of the invention there is provided a method of cooling a plurality of cooling zones for commercial use, said method comprising:

placing at least one cooling screw in each cooling zone, including a cooling unit adapted to cool a plurality of cooling zones, placing the unit on top of a stable box for at least one of the cooling zones so as to be placed on the track surface of the selected one cooling zone

According to a second embodiment of the present invention, a modular commercial refrigeration unit arranged to accommodate the total cooling loads of the at least two stable cooling zones comprises a shelf-mounted closed circuit steam phase cooling system with multiple compressors and evaporator heat exchange means, closed loop liquid refrigerant circulating means. refrigerant in relation to the heat exchanger with said evaporator heat exchanger, and further with the heat exchanger coolant for the cooling zone

According to a further aspect of the present invention, the cooling system and unit of the second embodiment is designed and adapted to be mounted within a track area of one cooling zone of a stable box. According to this aspect, the unit may use vertically oriented compressors and may be placed horizontally on top of the selected stable box, especially when the stable box is standing alone in the grocery store.

Alternatively, the unit may use vertically oriented compressors and may be positioned vertically on a selected stable box, if the stable box is located near a vertical wall.

Overview of the drawings

Embodiments of the invention will be described by way of example only and with reference to the accompanying drawings, in which:

Fig. 1 is a perspective view of a low-profile refrigeration unit according to a first embodiment of the present invention; Fig. 2 is a plan view of the unit of Fig. 1; Fig. 3 is a view of the other end of Fig. 1; Figure 5 shows a top view of the cooling system of Figure 4; Figure 6 shows a top view of the unit of Figure 1 with the lid removed; Figure 7 shows a front view of the unit of Figure 1 with the lid removed; Figure 8 shows a partial schematic of a modification of the cooling system of Figures 8 and 9; Figure 11 shows a schematic of another embodiment of the cooling system of Figure 8; circuit.

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DETAILED DESCRIPTION OF THE INVENTION

For the purpose of the description, the term "high side" is used to describe cooling where part of the vapor phase system is from the compressor outlet to the evaporator expansion valves, while "low side" means the part of the system from expansion valves to compressor suction. Also, the "low" temperature is related to the evaporator temperatures in the range of -3 5 ° F to -5 ° F, or the temperatures of frozen food and ice cream in the range of -20F to 0 ° F, the term "standard" or " normal (or "moderate") temperature means evaporator temperatures in the range of about 15 ° F to 40 ° F or non-frozen or fresh frozen food temperatures in the range of 25 ° F to 50 ° F.

1 and 9, a cooling unit generally indicated by the letter R is shown according to a first embodiment of the present invention. The cooling unit R is adapted to cool several cooling zones of the product, while the unit R comprises components of a cooling circuit comprising several compressors 20. The unit R has a dimension that allows it to be positioned within the dimensions of the cooling zone footprint. In the description, the term " trace " of the cooling zone is defined as the bottom space occupying the selected cooling stable box when viewed from above (or from below). In this embodiment, the unit R is adapted for use in a grocery store, such as a supermarket, and accordingly each cooling zone generally comprises the product area of a single sales cabinet or stable box 33. Of course, the cooling unit R may be located outside the customer space of the store. when the cooling zones are stable boxes or food preparation facilities. In any case, the modular refrigeration unit R is sized to accommodate separate cooling zones with optimum cooling temperatures, and it is clear that these zones include one or more supermarket, freezer, preparation room, or store cabinets, the latter representing an area lined sales stable boxes with the same operating temperature.

Figures 4 and 5 illustrate one or more sales boxes or stable boxes 33 that may be aligned or back-to-back. In this embodiment, there are eight such stable sales boxes 33, three of whose cabinets 33a are lined up and back to the other three cabinets 33b lined up, the arrangement being closed by the end boxes 33c. In another arrangement, several box cabinets may be positioned such that two cabinets are located on opposite sides of the warehouse wall, but in another arrangement, the cabinets 33 may be placed side by side. One unit R is located on the top and bridges two sales cabinets 33, although the preferred unit is sized to fit the track area corresponding to one stable box

1-3 and 6-9, each of the modular units R comprises a shelf or base 20 of a condensing unit that is designed and arranged to support and accommodate closed cooling circuit components 19 that are directed to the cooling load requirements of its connected refrigerant units. The typical shelf 20 of the condenser unit of the present invention comprises two small compressors 21, or other similar variable capacity means, connected via an outlet manifold 22 to the condenser of the system 12, preferably placed on the shelf 20. In FIG. it can be seen that the heat recovery screw 24 can optionally be connected on the top side downstream of the condenser 12. An oil separator (not shown) may be placed in the system 19 downstream of the outlet conduit 22. In a preferred embodiment, the closed (vapor compression) cooling system 19 can be critically supplied with coolant and therefore does not need to have a liquid receiver to receive condensate discharge from condenser 12. By way of illustration, the liquid receiver 26 is shown; to use more than a critical amount of coolant without departing from the scope of the invention. The high side of circuit 19 is connected by means of a fluid-passing tube 27 to an evaporative expansion valve 28 for an exhaust refrigerant 29 connected to a cooling zone of the product 33 to be cooled. On the underside, the coolant expands and vaporizes in countertop evaporators 29, removing heat from the product zones 33, maintaining a predetermined cooling mode. The outlets from the discharges 29 are connected by the suction line 30 to the suction line of the manifold 31 and from there to the suction side of the compressor 21, thereby closing the cooling circuit.

In this embodiment, the compressor unit comprises two compressors 21 connected in parallel in the refrigeration circuit. Preferred are the horizontal compressors 21 available from HITACHI under model numbers FL 200DL, FL 300DL, FL 400DL and FL 500DL. The provision of horizontal compressors 21 within the unit R creates a low-profile unit that can be placed directly on top of the selected sales cabinet 33 so that it is at least partially hidden from observation by persons moving on the floor of the supermarket. a size such that it fits into the profile of one stable box 33 In practice, it can be positioned to overlap or bridge two or more boxes

Referring to Fig. 9, the cooling circuit 19 of the unit R includes a low side or suction line 30 (S) and a high side or fluid line 27 (L) The suction line 30 is connected to one end of a normally open isolation service valve 25 which can be closed for Installation and operation of the cooling unit R The other side of the closed valve 25 is connected via the suction strainer 36 and via the safety valve 37 to the suction manifold 27 The T-shaped meter 38 is • '· · ·

- 9 “· 9« 9 * • · · · ··· ♦ · ·>

mounted on line 30 and another T-shaped connection connects the control transducer 39 to the line

30. which senses the coolant pressure in the suction line 30. If the coolant pressure in the suction line 30 falls below a specified level, the operation of the unit R is checked to see if the compressors 21 are damaged.

The compressors 21 are connected in parallel and are provided in the side conduit 42 with solenoid valves 41 which equalize the pressure when the compressors 21 start. The high side of each compressor is provided with a one-way check valve 44, which serves to isolate the cooling circuit of the high side of each compressor at start-up and pressure equalization. An injection valve (stand) 46 is connected to the outlet of each compressor 21. A safety switch 47 is connected to the high side of the discharge manifold, there is also an outlet pressure reader 48 and a gauge connector 49.

It will be understood that the refrigeration system units R may generally include other system components, such as a defrosting system, an operation and control sensing panel, and a microprocessor, alarm system, and the like. 9 shows a unit R with a connection to the coolant tank 26 followed by a liquid dryer 53, a liquid level viewer 54 and a one-way valve 55.

Although it is preferred to place the condenser of the system 12 on the shelf of the unit 20, the condenser may be mounted on the roof of the food store where it performs the cooling operation in the usual manner. When placed on the shelf 20, it is essential that adequate heat is dissipated outside the sales room so that the condenser can be cooled in several conventional ways. The circulation system also circulates coolant or coolant from a remote source (11) towards the respective condenser / heat exchanger unit 12. The coolant system C delivers coolant, such as water or glycol, from one or more remote sources U, 11A and 11B and removes to the condenser 12 of each modular unit R The coolant source 11 may be a single water cooling device, such as a closed or open roof tower 11A or a ground water source 11 or a combination thereof, to ensure a continuous supply of coolant at a substantially constant temperature.

In this embodiment, the plate-type condenser 12 has a heat exchanger with a cooling worm 12a having a supply from a remote coolant source.

The invention further includes the use of a secondary cooling system C to directly distribute the cooling load of the heat exchanger screws 29 of the sales stable boxes 33 of the respective RZ units of Figs. 1, 3, 8, and 9. F) of the condenser 12 are connected to a remote source of coolant (11), thereby establishing a heat exchange relationship with the condenser 12.

Referring to FIG. 10, the R unit need not provide condensation means located on the shelf 20, but the condenser 112 can be located at a remote location from the R unit. The remote condenser may be mounted on a shop roof and may include an air-cooling source

1-3, 6 and 7, the unit R comprises a shelf of the condensation unit 20 with a base or chassis 56 with fixed upright end walls 55 and a removable lid or cover 57, which is usually soundproof. The compressors 21 and other cooling components included in the unit R are mounted on the base 56, while the compressors 21 are mounted on the subframe. Relatively compact dimensions are given by typical values, length 1290 mm, depth 750 mm, height 275 mm.

Referring to FIG. 6, the electrical circuit of the unit R includes a main controller of the unit 59, a power supply circuit for each compressor 21, a rotary fan 60, a fan guard 60a. As can further be seen in FIG. 3, at least one vent 61 is provided at one end wall 55 of the R unit. The combination of fans 60 and vent 61 allows air to pass through the unit R.

In operation, the unit R may be included together with the cooling system in the sales cabinet 33, wherein the components of the cooling unit include at least several compressors 21, the unit R having a size that corresponds to the footprint area on the floor of the sales cabinet 33.

The cooling temperature of the chiller unit R is about -8 ° C, the return suction temperature is about 5 ° C, the condensation temperature is about 35 ° C, and the liquid temperature is about 32 ° C, which are the preferred values for this embodiment. It is also preferred to use a plurality of combined compressors 21 to provide the required cooling capacity. Examples are as follows:

Modelv kompresorů HP 2 x FL 200DL 2/4 1 x FL 200DL plus 1 x FL 300DL 2/3/5 2 x FL 300DL 3/6 1 x FL 300DL plus 1 x FL 400DL 3/4/7 2 x FL 400dl 4/8 1 x FL 400DL plus 1 x FL 500DL 4/5/9 2 x FL 500 DL 5/10

From the foregoing, it will be appreciated that the preferred refrigeration unit R of the present invention provides a compact, low profile multi-compressor block, 4 < b > · Bbb

- 11 b b b which can be mounted on top of one stable box or other cooling cabinet 33 and does not occupy the area inside the store. The R unit comprises two parallel-connected compressors 21 with a selected range from 4 HP to 10 HP or more

In supermarkets, a plurality of such cooling systems 19 can be operated in a network for the entire store. The R unit can be designed and arranged to provide the low and medium temperature needed in the shop. It will also be appreciated that a plurality of compressors 21 can be used to provide the required cooling capacity, while compressors of different sizes can be used on the shelves 20 of different R units. It is known in the art that a condensation device necessarily includes compressors as the primary driving forces of the condensation function, whereby the condenser itself can be placed elsewhere than on a shelf. From the foregoing, it will be appreciated that the preferred unit R of the present invention provides a compact low profile multi-compressor block that can be mounted on top of one stable box or other cooling cabinet 33 and does not occupy the area within the shop, thereby actually meeting optimal placement requirements. The preferred unit R comprises two parallel horizontal compressors 21, each having a value of from 2 HP to 5 HP.

Said embodiment of the preferred unit R is a liquid-cooled unit comprising a plate heat condenser 12. The unit may also include a small fluid tank 26 and an electrical control panel, a complete conduit network, and an electrical network. By connecting the evaporators (29) arranged so as to extend from the top of the sales cabinets 33, an optimum length of the external piping system can be achieved which can be easily installed

A further embodiment of the commercial refrigeration unit R of the present invention is shown in Fig. 11 This unit is in many ways similar to that of Figures 1-10, for example in that a closed cooling system 19 with several compressors 21 is incorporated into the shelf 20 of the condensing unit 20. the closed cooling system 19 (vapor compression) can be filled with a cooling medium and therefore does not require the presence of a liquid container to receive condensate discharge from the condenser 12 The high side of circuit 19 is connected by fluid line 27 to evaporator expansion valve 28 Evaporators 29 forming part of the closed cooling circuit 19 are designed and arranged to include a refrigerant cooling unit 130. On the low side, the refrigerant in the evaporators 29 dissipates heat from the refrigerant, while the evaporator outlet is connected by suction line 31 to the compressor suction. 21, thereby completes a closed cooling circuit Although it is preferred to place the condenser of the cooling system 12 on the shelf of the unit 20, it may also

placed on the roof outside the grocery store for air cooling in a known manner

The embodiment further includes the use of a secondary cooling system 160 serving to directly distribute the heat exchange worm cooling load 129 of the sales cabinets 133. In this embodiment, a shelf mounted cooling system outlet 29 is part of the heat exchanger cooling unit 130 for the cooling system. It is preferred that the pump 142 for the secondary cooling system 160 be mounted on a shelf and connected so as to circulate the glycol refrigerant or the like, through a cooled heat exchanger 130, and therefrom to pass through line 70 to the load at each connected auger. Counter heat exchangers. The cold coolant removes heat from the worm 29 (typically a conventional coolant fin tube) from where it returns to the pump 142 via the return line 46. The design and operation of the modular secondary system, according to this embodiment, will be more readily understood from U.S. Pat. No. 5,743,102 (incorporated herein by reference).

Since the main feature of the invention is the location of the cooling unit R as close as possible to the cooling zone of the connected stable sales box 33, in order to eliminate the traditional machine room, long connecting pipes and large previously required amounts of coolant. The stable box 33 provides the optimum solution to meet all the objectives of the present invention.

All embodiments of the invention have been described by way of example only, and are not intended to limit the scope of the invention in any way. Many modifications can be made to the embodiments without departing from the scope of the invention.

Claims (40)

PATENT CLAIMS A refrigeration unit adapted to be used in combination with a plurality of refrigerated stable boxes (stores) connected in stores, each box comprising an insulated lid top wall and an inner product zone, further comprising heat transfer cooling means for cooling, said refrigeration unit comprising a housing with a mounting profile designed to fit on the surface of said top wall of one stable box, adapted to accommodate selected refrigeration components of a closed refrigeration circuit to meet all the cooling requirements of all attached stable boxes, said components comprising a plurality of vapor phase compressors; a tightly coupled cooling loop for connection to the heat transfer coolant of all attached stable boxes. 2. The refrigeration unit of claim 1 wherein two of the plurality of compressors are helical fins. 3. The refrigeration unit of claim 1 wherein said two compressors of several compressors have different capacities. 4. The refrigeration unit of claim 1 wherein said unit has a horizontal mounting profile including superimposed and horizontally oriented compressors. 5. The cooling unit of claim 4, wherein said one stable box is freely mounted in a shop and the cooling unit is located on the top side of the attached one of said stable boxes, such that its horizontal profile abuts the top wall of the box. A cooling unit according to claim 1, characterized in that the cooling unit has a vertical mounting profile on which vertically oriented compressors are located. 7. The refrigeration unit of claim 6, wherein said attached stable box is positioned against a vertical wall of the store and the refrigeration unit is disposable. - 14> 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 99 · polož 9 9 9 9 polož horní 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 8. The cooling unit of claim 1, wherein said housing comprises a mounting base and end walls for receiving selected cooling components and for mounting pipe joints of closely coupled cooling loops. 9. The cooling unit of claim 8, wherein said housing includes a lid for covering the entire mounting base between the end walls, thereby encapsulating the internally located cooling component. The refrigeration unit of claim 9, wherein the housing is designed and adapted to form a sound absorbing barrier. A cooling unit according to claim 8, wherein said housing is designed and arranged to receive internally the tubular joints extending outwardly through at least one end wall for the purpose of attaching a heat exchanger coolant for all attached stable boxes. 12. The cooling unit of claim 1 including a control panel with tools for monitoring the operation of the cooling unit 13. The refrigeration unit of claim 1, wherein said housing comprises a mounting base forming a shelf condensation unit for receiving said compressors, said compressors being part of a closed vapor phase refrigeration system comprising fluid and suction line connections. 14. The cooling unit of claim 13 including a condenser as part of a closed vapor phase cooling system. 15. The cooling unit of claim 14 wherein said condenser is part of a first heat exchanger disposed on said mounting base and comprises condenser cooling means. 9 9 9 9 9 99 99 9 ♦ 9 99 9 9 9 9 9 9 9 9 9 9 9 • 9 9 • 9 · 9 9 9 • 9 9 9 9 9 9 9 9 9 • 9 9 9 9 999 99 9 '9 9 • 9 999 16. The cooling unit of claim 15 wherein the condenser mounting base is mounted on a shelf of the condenser unit. 17. The cooling unit of claim 15 wherein the condenser cooling means comprises an external liquid refrigerant source selected from the group consisting of a cooling tower, a refrigerant cooling system, a cold groundwater supply, a specialized cooling system, or an air-cooled heat exchanger. 18. The cooling unit of claim 13, wherein said condenser is located separately from the housing and condensing unit and is cooled by water or air. 19. The refrigeration unit of claim 14, wherein the heat transfer refrigeration means of the connected stable boxes include evaporator worms as part of a closed vapor phase cooling circuit and are connected between said condenser and on the high side and a plurality of compressors on the low side. 20. The refrigeration unit of claim 14 including an evaporative cooling heat exchanger with an evaporator screw as part of a closed vapor phase cooling system. 21. The refrigeration unit of claim 20, wherein said heat transfer refrigeration means comprises a liquid cooled heat exchanger as part of a glycol-based liquid cooling system having a cooling phase with a cooling loop connected to the evaporative cooling heat exchanger. 22. The refrigeration unit of claim 1, wherein, in combination with a plurality of connected refrigeration stable boxes, said compressors are connected via cooling loops with heat transfer cooling loops of each stable box. 23 In combination with at least two refrigerated stable boxes in the store, each box has an insulated housing with an unperforated top wall surface and an inner product zone, comprising heat transfer coolants for cooling said product zones, wherein the refrigeration unit comprises a single housing with a mounting base profile designed; that φ φ φ * * * · · · · φ φ φ φ φ φ φ φ φ φ φ φ - 16φ φφφφ Φ Φ φφ Φ φ Φ φ φ Φ φ φ Φ • φφ φ · can be placed on the top wall surface of one of the refrigeration stable boxes, while being arranged to accommodate select refrigeration components of the refrigeration circuit including vapor phase compressors, further comprising a tightly coupled cooling loop connected to meet the cooling requirements of the heat transfer refrigerants of all refrigerated stable boxes. 24. The combination of claim 23, wherein each of the stable refrigerated boxes comprises separate circulation means for circulating air through the heat transfer refrigeration means and the product zone. Combination according to claim 23, characterized in that said compressors are compressors with spiral cooling fins. Combination according to claim 23, characterized in that two of said compressors are compressors with spiral cooling fins and with different capacities. 27. The combination of claim 23, wherein the cooling unit comprises a horizontal mounting profile of the base upon which the housing of the horizontally positioned compressors rests. The combination of claim 27, wherein one refrigerated stable box stands freely adjacent to other refrigerated stable boxes, wherein the refrigeration unit is positioned over the top of one refrigerated box and its horizontal base profile rests on the upper wall of the box. 29. The combination of claim 23 wherein the cooling unit has a vertical mounting profile and accommodates vertically oriented compressors. A cooling unit according to claim 23, characterized in that the unitary housing comprises a mounting base on which the selected cooling components and end walls for mounting the pipe connections of the tightly connected cooling loop rest. »* * ♦ ♦ * * ♦ ♦ ♦ 31. The cooling unit of claim 30, wherein said housing includes a lid to cover the entire mounting base between the end walls, thereby closing the cooling components located on the base. Combination according to claim 30, characterized in that the unitary housing is designed and arranged to completely accommodate the pipe joints extending out of the housing by at least one end wall in order to connect the heat transfer coolant means. 33. The cooling unit of claim 23, wherein the unitary housing is designed and arranged to form a sound absorbing barrier. Combination according to claim 23, characterized in that it comprises condensation means as part of the cooling circuit of the vapor phase of the cooling unit. 35. The combination of claim 34, wherein said condenser is part of a first heat exchanger mounted on a single housing and comprising cooling means. 36. The combination of claim 35, wherein the condenser cooling means comprises an external cooling source selected from the group consisting of a liquid cooling tower, a refrigerant cooling system, an underground cold water supply, a specialized cooling system, or an air-cooled heat exchanger. Combination according to claim 35, characterized in that the condenser is located at a certain distance from the unit housing and is cooled by water or air 38. The combination of claim 34, wherein the heat transfer refrigeration means of the refrigerated stable boxes comprise evaporator screws as part of a closed vapor phase refrigeration circuit and are connected between a high side condenser and a plurality of low side compressors. A combination according to claim 34, characterized in that it comprises an evaporative heat exchanger with evaporator screws as part of a closed vapor phase cooling circuit. - 18 • 9 • »: 2 9 · ·· » 40. The combination of claim 39, wherein the heat transfer refrigeration means of the refrigerated stable boxes comprises a liquid cooled heat exchanger as part of a glycol-type liquid refrigerant system comprising a cooling phase in which a cooling loop is connected to heat exchange to the heat exchanger. evaporating screw