MXPA97003454A - Heat exchange unit for been container cooling - Google Patents

Abstract

The present invention relates to a portable heat exchange unit for cooling a medium, characterized in that it comprises: a container adapted to contain a discrete quantity of a compressed or liquefied gas, the container including a wall arranged to be placed in contact with the means to be cooled, a valve for operatively controlling the release of said gas from the container, a panel located adjacent to and within the wall of the container to operatively direct the gas towards the heat exchange contact with the wall of the container and arranged to release gas from the top of the panel, and means to expel the gas from the container

Description

UNIT DF INTERCRMBTO DF COLOR PORO OUTQENFRIflflIFNTn DF CONTAINERS PE DRINKS CIPILPO PE fí INVENCIÓN This invention relates to a portable and disposable unit for cooling a beverage.

RNTECEPENTES PE Lñ INVENCIÓN A large variety of units have been proposed in the Patent literature to cool a beverage, and particularly, to cool a beverage contained in a discarded lat. However, devices have not been commercially successful. One reason they have not been successful is that they are not compatible with the conventional bottling methodology. In many cases, they require the use of specially designed beverage cans and, as a result, specific designed bottling or canning is required.

BRIEF PESCRIPCIQN PE Lfl INVENTION The present invention is the result of the work of the inventors in the quest to provide a heat exchange unit that can be inserted into a beverage can in the bottling process and that can be operated by the differential pressure that occurs in The can when the can is opened As will be apparent from the following detailed description, the inventors can produce heat exchanger embodiments in accordance with the present invention, in which the heat exchange unit -It can be used without modifying the construction of the conventional beverage can.The conventional lid and bottom of the can can be used.Therefore, the production of canned drinks that have self-cooling capacity can be easily integrated with the production of beverages conventional canning without any interruption or modification for the bottling or canning line.

DETAILED DESCRIPTION DF 10 INVENTION In accordance with a first aspect of the invention, the inventors provide a heat exchange unit port for cooling a medium comprising: a container adapted to contain a discrete amount of a liquefied or compressed gas; the container includes a wall arranged to be placed in contact with the medium to be cooled; a valve for operatively controlling the release of said gas from the container; a panel located adjacently and within the wall of the container for operating the gas to heat exchange contact with the wall of the container and arranged to release gas from the top of the panel; and a means for dissipating the gas from the container. In a secondary and alternative aspect of the invention, the inventors provide a heat exchange unit for use in cooling a beverage in a refurbished can, where the pressure in the can decreases when the can is opened; the can includes a lid; the heat exchange unit comprises: a container adapted to contain a discrete quantity of a compressed or liquefied gas; and a valve for operatively controlling the release of gas from the container; The valve is operatively arranged to open and release gas from the container in response to the pressure drop that accompanies the opening of the 1 at. The invention provides, in a third alternative aspect thereof, a container for a food or drink comprising: a first container adapted to contain food or drink; and a heat exchange unit that includes a second container that contains a discrete amount of a gas 0 compressed or liquefied, the second container includes a heat conducting contact wall with the wall of the ppmer redpiente or with its interior; said heat exchange unit includes a valve for controlling the release of gas from the second container, a panel located adjacent to and inside the wall of the second container to direct the gas in heat exchange contact with the wall of the second container and to release the gas from the top of the panel; and a means for dissipating the gas from the second container. According to a fourth alternative aspect, the invention provides a pre-packaged container for a food or beverage comprising: a first container adapted to contain the food or beverage, the first container includes a lid having a tear panel for opening the container; and a heat exchange unit including a second container containing a discrete amount of a compressed or liquefied gas, the second container includes a heat conducting contact wall with the wall of the first, a valve for controlling the release of the gas of the second container; wherein the pressure in the container decreases when the container is opened by means of the tear panel; the valve is adapted to open and release gas from the second container in response to the pressure decrease accompanying the opening of the container. In a preferred embodiment, the heat exchange unit - provides efficient heat transfer by use of a panel with flanges which is placed in the heat exchange unit so as to form channels between the panel and the wall of the unit which directs vaporized gas up the sides of the can of the heat exchange unit. Preferably, the heat exchange unit floats towards the high part of the can during the can filling process.

In one embodiment, the gas cools the unit by flowing through channels formed by a panel member, which abuts the inner wall of a first chamber in the unit, and upon evaporation. The liquefied gas moves up the channels through the physical action of the boiling gas. When the gas rises up the channels, it absorbs heat from the beverage through the wall of the first charcoal. Sealing a material for the panel, which can be wetted with a liquefied gas, occurs heat transfer ex quite efficient from the medium that is going to cool down to the gas. Once the gas has been heated by the heat transfer, it dissipates from the container. In another embodiment, before being dissipated from the unit, the vaporized gas flows into a swirl generating device creating a swirling field that generates a cold gas stream due to the swirling effect. This current encloses the container-in a second chamber of the unit. In this way, the container is cooled first by the evaporation of liquefied gas and then by the gas after it passes through the swirl generating device. In another embodiment, the heat exchange unit, preferably mechanically different from the container that cools and floats freely in the beverage. When the can is opened, a differential pressure in the can causes the valve to open and the gas to be released from the unit. Hereinafter, the invention will be described more particularly, by way of example only, with reference to the accompanying drawings, in which: Figure 1 is a cross-sectional illustration of a container of toasted drinks in an unacceptable condition; ivada Figure 2 is a cross-sectional illustration of the beverage container in an activated condition. Figure 30 is a top plan view of the panel that lines the inside of the heat exchange unit '. Figure 3B is a side view of the panel that lines the interior of the heat exchange unit. Figure 40 is a cross-sectional view of the central post of the heat exchange unit. Figure 4B is a view of the central post of the heat exchange unit along the line 4B-4B. Figure 4C is a view of the post cent to the heat exchange unit along 4C-4C; and Figure 5 is a top view of the dissipation door of this invention. Figure 1 illustrates a beverage container of the type that can be used to contain beverages such as beer, soda, fruit juices and the like. The can 50 includes a lid 54 that includes a conventional top flange 56 capable of opening a hole for drinking-in the lid 54-in a conventional manner. The cover 54 conventionally includes an annular rim 104 therein. The beverage can 50 includes a heat exchange unit LO which is immersed in the beverage 62 in the can 50. The heat exchange unit includes a can sub-assembly 60 and an actuator subassembly 142 that jump together in the tabs 94 and 96 as described herein. The can 60 contains a gas (not shown) which is used to cool the beverage 62 and is contained under pressure in a compressed or liquefied state. In a preferred mode, the can contains a liquid refrigerant under pressure. However, it is also possible to use a compressed gas such as carbon dioxide. The can 60 includes a base 70, an integral lid 72 and a wall 90. As shown in FIG. 1, the post 82 is captured in the recess 74 in the base 70 of the can 60 by means of a "friction or jump" adjustment, or by being thermal and heated in such a way that when inserted into the recess 74 in the base, it conforms to the shape of the recess 74. The post 82 reinforces the can 60 when it is under pressure and prevents the base 70 and cover 72 are deformed e terior-mind by the pressure in the unit. The bell 84, which is hollow and cylindrical, extends aeconomically from the post 82. Around its outer surface, the bell 84 includes a flange 94 for receiving the ring-shaped flange flange 164 in a jump fit. , • > The disc 86, which is shown in Fig. 40, extends radially from the bell 84 and includes an annular flange portion 88. As shown in Fig. 4C the post 82 also includes a plurality of openings 120 that are connected by pipes 122 to openings 74 in the disk 86. A plurality of channels (typically four) 5 126 are located in the base of the hood 84 to provide adequate cooling flow in the swirl generating area 78 To create a helical air flow, as discussed below, as shown in Figure 4B, disk 86 has LO a plurality of flanges 132 on its upper surface. These ridges 132, when in contact with the lid 72, form compar-tients 134 that provide increased heat exchange contact between the gas and the beverage. A plurality of channels 130 in the bell 84 provide a means of communication L5 between the areas 134 and the passage 162. The can 50 of the heat exchange unit 10 is divided into a first heat exchange chamber 64 and a second heat exchange chamber 66. The base 70, the disk 86 and par-ed 90 form a first chamber of exchange of - 64. The chamber 64, along the interior of the wall 90, includes the panel 92 which preferably includes flanges 192 thereon. The flanges 192 form a plurality of channels 98 along the interior surface of the wall 90. The cover 72, the flange portion 88 of the disc 86, and the wall 90 form the second heat exchange chamber 66. This second heat exchange chamber 66 communicates with compartments 134 to provide a second section of the heat exchange unit 10 in which the gas can exchange heat with the medium that will cool. Panel 92, which surrounds the interior circulation of par-ed 90, may be formed of polypropylene, polyester or polycarbonate, with polyester being preferred. In a preferred embodiment, the panel 92 is formed of a material that is capable of being wetted with the liquefied gas. As seen in FIGS. 30 and 3B, panel 92 includes a plurality of ridges L92 spaced apart along the wall 94. These ridges 192 are spaced apart by approximately L0 °, measured from the center of one flange to the other. next, and these ridges, together with the walls 90 and 94 form a plurality of channels 98. Each flange extends from the wall 94 approximately 0.51 rn and is 0.51 nm wide. Typically, the panel 92 is approximately 56.6 mm in height and has a sufficient length to couple-the entire inner circumference of the can 60. One skilled in the art will appreciate that the dimensions of the flanges 192 and the channels 98 vary depending of the size of the heat exchange unit in which the panel 92 is used. The dimensions of the unit vary in size according to the can designated for cooling. Although it is illustrated that the channels 98 run perpendicular to the base 70 of the chamber 64, one skilled in the art will appreciate that the channels 98 may be spiral or take any path that can provide effective cooling of the beverage 62 in the can 50. .

As shown in Figures 1 and 2, the actuator sub-assembly 142 includes annular panel RO, slot 100, panel 144, an integral tubular base 146 and actuator 150. The tubular base 146 radially expands towards an annular ring 164 having a tab 96 to capture the tab 94 in a jump setting. The base 146 includes a channel 162 running along the length of the base 146. The actuator 150 extends through the base 146 and extends from the sub-base 142 through the opening 148 in the annular panel 80. The opening 148 may be hexagonal, and actuator 150 may be circular in cross-section to provide access for ventilation of unit 1.0, as described below. The annular panel 80 and the membrane 144 are circular and the annular panel 80 includes l <; slot 100 around its outer periphery. The tab 106 is from the outside of the slot 100. The actuator 150 includes a shoulder 152 that engages a shoulder 156 in the base 14 to seal the channel 162, the unit is in an inactive condition. As seen in Figure 5, the annular panel 80 also includes the opening 158 and the opening 160. To provide a floating unit, the unit 10 can be formed from any plastic used for blow molding or injection molding parts. Plastic such as polycarbonate, polyethylene and polyester have been found useful, and polyester has been found particularly useful. The can 60 can be formed of aluminum or plastic. However, aluminum is preferred because of its superior heat transfer characteristics. The heat exchange unit 10 is also designed so that it can be placed in a normal beverage can 50 during the canning process. After the unit 10 has been inserted into the beverage can 50, the beverage can 50 is filled with the beverage 62. Once the can 50 has been filled with the beverage 62, the lid 54 is placed on the can 50 and sealed in its position .. In a typical canning process for carbonated and non-carbonated beverages, before the can 50 is sealed, a shot of an inert gas such as nitrogen is injected into the can 50 to pressurize the can 50. The assembled heat exchange unit 10 is designed so that when the can 50 is filled with beverage 62, the heat exchange unit 10 floats toward the top of the can 50 and the tab 106 is prevented from coming off of the can 50. In a sealed can, the pressure of the beverage 62 increases slowly due to a release of nitrogen pressure and / or carbonation inside the body of the beverage 62. The unit 10, guided by the shape of the can 50, and more particularly the portion of the truncated cone mouth of the a can, floats upwardly and the slot 100 on the unit engages with the flange 104 on the can. The openings L58 and 160 are provided in annular panel 80 to allow nitrogen gas or carbonation to escape, so that the unit is not activated while it is attached to the lid 52 of the can 50. The openings 158 and 160 are directed so as to allow the pressure in the can 50 to equilibrate during the filling process but not allow the pressure in the can 50 to be equalized during the activation procedure. The annular panel 80 covers the tongue area of the can 50. The density of the unit 10 is approximately equal to 1? of the beverage 62, so that the unit 10 is not easily dislodged from the lid 52 while the can 50 is in a sealed condition. The annular panel 80 prevents the beverage 62 from flowing from the can 50 when the can 50 is in the sealed, inactive condition, unless the pressure of the beverage 62 is reduced to atmospheric pressure causing the annular panel 80 to be released from the cover 54, as described below. When the can 50 opens and the seal breaks, the annular panel 80 is released from the lid 54 of the can 50 after the unit 10 has cooled the beverage 52, as described to < continue, allowing the beverage 62 to be emptied from the Can 50. To operate the heat exchange unit-10, the can 50 is opened by means of the upper pull 56 in the lid 54. 01 to open the Can 50, a differential pressure is created between the space above the membrane 144, which reaches the atmospheric pressure, and the body of the beverage 62. The differential pressure between the beverage 62 and the atmospheric pressure rich in the space above the membrane 144 forces the unit 10 towards the lid 54 of the can 50 causing the actuator 50 to be depressed when it contacts the lid 54. This differential pressure originates from the beverage having a pressure of approximately 1.37895 to 2.068425 x lO ^ N / 3 and The atmospheric pressure is approximately 9.65265 x lO ^ N m ") As shown in Figure 2, the upward movement of the unit 10 causes the membrane 144 to bend upwardly. As stated above, the openings 158 and 160 are not large enough to allow the pressure above and below the annular panel 80 to equilibrate and prevent activation of the heat exchange unit 10. The actuator 150 is driven into the area swirl 78 by contact with the lid 54 of the can 50. 01 moving the activator 150 towards the swirl area 78, the passage 162 is opened while the shoulder 152 of the activator 150 moves away from the shoulder 156 at the base 146 of the panol annulled. Once the passage 162 is opened, the gas has an escape route from the unit 10 and, in this way, the unit 10 is actuated. Once the unit 10 has been operated, the pressure on the gas in the chamber decreases. can 60, which causes the gas to boil. This boiling action causes the liquefied gas to flow to the bottom of the channels 98. The first point of heat transfer between the beverage 62 and the liquefied gas occurs within the channels 98. The heat of the beverage 62 is absorbed by- the gas through the wall 90 of the Can 60 while the gas evaporates by means of adiabatic expansion.

As the temperature of the gas increases, the liquefied gas begins to boil within the channels 98. This boiling action drives the liquefied gas upwards into the channels 98. The additional exposure of the gas flowing upwards to the surface of the inter- Heat change from chamber 64 causes the gas to boil. This boiling and progressive propagation of the liquefied gas ensures that the entire inner surface of the par-ed 90 and the base 70 of the can 60 are bathed with inlet gas. This method increases with the heat exchange efficiency of the unit 10 immensely. After the gas has flowed up and through the channels 98, it dissipates from the unit 10. The gas flows from the channels 98 into the evacuated space by the liquefied gas in the chamber 64. Then the gas flows into the channels 126 and into the area of swirls 78. The gas leaves the area of swirls 78 and flows through the openings 158 in the base of the activator 150 in the channel 162. It is then tearing the channel 162 through the slots in the opening 148. Then, the gas flows through the lid 54 of the can 50 by means of the opening created by the upper tap-56. unit is equipped optionally with a swirl generator that works as follows. In a preferred embodiment, once the gas leaves the channels 98 and before being dissipated from the can 50, the gas flows to the whirling generating area 78 through the channels 126 in the bell 84. As noted in Figure 2, the swirl generating area 78 is open when the actuator 150 is moved downwardly by activation of the unit 10. In the whirling generating array 78, a helical gas flow is created, while the gas enters the area 78 through channels 126 shown in Figure 4a. The helical gas flow originates from the channels 126 which, in this mode, are arranged tangentially to the area 78. In this way, while the gas enters the area 38 a circular flow is provided. The function of a swirl generator is to generate a cooled gas stream and is described in the U.S. Patent. No. 5,331,817 to Anthony, the description of which is incorporated herein by reference. The helical flow of gas increases through the center of the swirl generating area 78. An underpressure is created while the spiral gas makes contact with the bottom of the stumper 150. The cooled gas is forced downwardly through an opening (not shown) in the center of the hood 84 to the openings 120. The heated gas is then torn from the can 50, as described below. The swirl generating area 78 may include screens (not shown) to increase the swirl effect. The ability of the swirl generating area 78 to establish and sustain a helical flow of high velocity gas can increase the efficiency of the heat exchange unit 10. The exact dimensions of the swirl generating area 78 vary, particularly depending on the size of the tin 50 in which the unit 10 and the required cooling amount of the unit 10 are used. The cooled gas flows from the swirl generating area 78 to the chamber 66 by means of openings 120 in the base of the hood 84 The gas flows from the openings 120 to the chamber 66 via the tubes 122. Once in the chamber 66, the cooled gas absorbs heat from the beverage 62 through the wall 90 and the lid 72 of the can 60. , and also cooling the beverage 62 as it flows into the hood 84 through the areas 134. As the gas flows through the chamber 66 towards the hub 84, it is heated by its thermal exchange with the beverage. The heated gas flows through the channels 130 in the hub 84 and into the passage 162. The gas is then exhausted from the unit 10 between the actuator 150 and the opening 148, as described above. As the cooled gas moves to cool the beverage 62, the heated gas is simultaneously exhausted from the unit 10. The heated gas flows through the passage 162 and leaves the unit 10 and the can 50 in the same manner as described before. The swirl generating area-a and the channels 126 are designed to provide back pressure on the cooling gas in the chamber 64. Due to the sizes of the channels 126 and the swirl generating area 78, the gas can only exit the chamber 64 at a reduced flow rate. This reduced flow velocity causes the gas to increase pressure which, in turn, provides a pressure on the liquefied gas that maintains Lene to the liquefied gas. Without this back pressure, the liquefied gas in the chamber 64 would quickly evaporate and exit the chamber 64 without flowing through the channels 98, thus making the first heat exchange chamber 64 inoperative. Therefore, even when the swirling effect is not desired to cool, the back pressure generated in the arc 78 contributes to the operation of the can. After the evaporation and heat exchange cycle by optional whirling action ends, the pressure of beverage 62 will be normalized to atmospheric pressure. As the pressure of the beverage 62 decreases, the differential pressure between the beverage 62 and the area above the membrane 144 decreases correspondingly. Finally, the differential pressure will no longer exceed the pressure that is required to maintain the membrane 144 in a flexed position. the heat exchange unit 10 is moved away from the cover 54 by the retreat of the membrane 144 of the annular panel 30 to its original flat condition. After the heat exchange unit 10 has moved away from the lid 54 of the can 50, the beverage 62 can be emptied after the can 50 consumption. Because the heat exchange unit 10 is constructed of a material which floats in the beverage 62 and the gas originally in the can is exhausted, the thermal interchange unit 10 floats to the bottom of the can 50 as beverage is tilted in position to pour the drink 62 from the can 50 or to consume the drink 62 directly from the can 50. Osi, the flow of the drink 62 from the can 50 is not obstructed by the unit 10 during the spill or consumption. The preferred gas used to cool the beverage 62 consists of a mixture of HFC 125, which is penta luoroethane, and HFC 152a, which is di f luoroethane. The gases are mixed in a ratio of almost 20:80 - 40:60 (HFC L25: HFC152a) and preferably in a ratio of almost 30:70. ["1 gas is stored at a pressure of 6.89475 x 1 CN m58 at 23.8 ° C.) The person skilled in the art will appreciate that the gas mixture will vary, depending on the degree of cooling desired and the amount of pressure required by the particular configuration of the beverage container and acceptable flammability limits of the particular gases used Another mixture that can be used is a mixture of propane, butane and HFC 134a, which is a 1-oethoethane, in a proportion from 25:25:50 (propane: butane: HFC 134a). Although this mixture gives almost the same results as the mixture of HFC 1 5: HFC 152a, it is not so preferred in view of the fact that propane and butane are flammable. Furthermore, HFC 134a is not as positive as HFC 125 or HFC 152a, although it is described here that the swirl generating area 78 creates the swirl by means of channels 126 which are disposed tangent to the swirl generating area. 78, the expert in the art recon It will be understood that the swirl generating apparatus can take many forms. For example, the generator may include a member in the swirl generating area 78 for directing the gas in spiral flow within the area 78. The member may include a plurality of arched deflectors, which direct the gas from a tangent on the interior of the generator 78 towards the center of the generator. The generator 78 may also be configured in the manner described in United States Patent No. 5,331,817 by Anthony, previously incorporated by reference, and United States Patent Application No. 08 / 164,204 by-Anthony, incorporated herein by reference. . One skilled in the art will also appreciate that the use of this invention is not limited to carbonated beverages and that it can also be used with non-carbonated beverages. Co or mentioned above, it is a common canning practice - non-carbonated beverages with nitrogen pressure. Nitrogen may be used to provide sufficient pressure to allow the LO unit to form an effective seal with the flange 104 and activate the unit 10. Os, non-carbonated beverages may be canned under pressure in the practice of this invention. Where a differential pressure activates the heat exchange unit 10, the beverage 62 must be packaged under a certain degree of nitrogen pressure or some other inert gas to bond to the other side.

Claims (35)

1. NOVELTY OF THE INVENTION REINFORCEMPTIONS 1. - A portable heat exchange unit - for cooling a medium comprising: a container adapted to contain a discrete quantity of a compressed or liquefied gas, the container including a wall arranged to be placed on contact with the medium to be be chilled a valve for operatively controlling the release of said gas from the container; a panel located adjacent and within the wall of the container pair operably directing the gas towards heat exchange contact with the wall of the container and arranged to release gas from the upper part of the panel; and means to eject the gas from the container.
2. 2. A heat transfer device according to claim 1, further characterized in that the panel has rims on the wall and engages the wall to form a plurality of channels between the rims and the wall.
3. 3. A portable heat exchange unit according to claim 1, further characterized in that the unit also comprises a swirl generator in the container.
4. 4. A portable heat exchange unit according to claim 3, further characterized in that the unit also comprises means for directing the gas released from the upper part of the panel towards the inode 1 generator.
5. 5. A portable heat exchange unit according to claim 4, further characterized in that the swirl generator includes a tube and channels to tangentially introduce a gas into the tube to produce a spiral gas flow that generates a current 6.- A portable heat exchange unit according to claim 5, further characterized in that it includes means for operating the cooled gas stream operatively to heat exchange contact with the receiver. 7. A portable heat exchange unit according to claim 6, further characterized in that the container includes a cover and a disc adjacent to the cover, the disc having ridges thereon which form compari- gas formers with the lid, the cooled gas stream being operatively driven to said compartments adjacent to the lid. 8. A portable heat exchange unit according to claim 1, further characterized in that the gas is a liquefied gas and the panel is formed of a polymeric material that is moistened by the liquefied gas. 9. A heat exchange unit for use in the cooling of a beverage in a pre-heated can, wherein the pressure in the can can decrease when the can is opened and the can includes a lid, the heat exchange unit comprising: a container adapted to contain a discrete quantity of a compressed or liquefied gas; and a valve for iiberably controlling the gas in the container, the valve being operatively arranged to open and release gas from the container in response to the decrease in pressure that accompanies the opening of the can, wherein the lid of the can includes a panel of tear to open the can, the heat exchange unit being adapted to be mounted inside the can and compress an annular panel having a first side facing the lid; a second side that looks away from the lid and a club; the annular panel being arranged to engage the inside of the lid of the can when the can is filled with drink < That surrounds the tear panel and the valve including a rod that extends through the hub in the annular panel; and the arrangement is such that upon opening the can, the pressure on the second side of the annular panel and the annular panel is brought to the lid and the valve stem makes contact with the lid by moving the valve in the aza of a position closed to an open one. 10. A heat exchange unit according to claim 9, further characterized in that a space is provided between the hub and the stem of the valve through which the gas is arranged to be. ejected from the container when the valve is opened, the space being sealed by the valve when the valve is closed so that gas can not escape from the container. 11. A heat exchange unit according to claim 10, further characterized in that the annular panel includes a circular depression adjacent to its perimeter adapted to seat therein a corresponding annular rim. The lid when the can is full. I drank «Ja. 12. A heat exchange unit according to claim 11, further characterized in that the container includes a wall arranged for operational contact with the beverage, and a panel located adjacent to and within the wall of the container for operable operation. the gas towards heat exchange contact with the vessel wall and Releasing the gas from the top of the panel. 13. A heat exchange unit according to claim 11, further characterized in that the heat exchange unit also includes a swirl generator in the container. 14. A container for a food or drink comprising: a first container adapted to contain food or drink; and a heat exchange unit including a second container containing a discrete amount of a compressed or liquefied gas, the second container including a heat conducting wall in contact with the wall of the first container or with its interior, said unit heat exchange - including a valve for controlling the release of gas from the second container, a panel placed adjacent to and within the wall of the second container to direct the gas towards heat exchange contact with the paret of the second container and to release the gas of escape from the second container. 15. A container in accordance with the indication rei 14, further characterized in that the heat exchange unit also comprises a swirl generator in the second container. 16. A container according to claim 14, further characterized in that the panel has ridges and hooks the wall to form a plurality of channels with the same, 17.- A container "Conformity with the rei i dication 15, characterized in addition because the swirl generator includes channels therein to tangentially introduce a gas to the generator to produce a flux in the spout. 18. A container according to claim 15, further characterized in that a stream of cooled gas is operatively emitted from the swirl generator and the exchange "Jad" also includes heat to conduct the gas cooled to contact of heat exchange with the second container. 19 - A pre-packaged container for a food or drink "comprising: a first container adapted to contain the food or beverage, the first container including a lid having a tear pan to open the container; and a heat exchange unit that includes a second container containing a discrete amount of a compressed or liquefied gas, the second container including a wall "Je heat conduction in contact with the wall of the first, a valve to control the release" He gas from the second container; wherein the pressure in the container decreases when the container is opened by means of the tear panel, the valve being adapted to open and release the gas from the second container in response to the decrease in pressure that accompanies the opening of the container, where the heat exchange unit comprises an annular panel having a first side facing the lid, a second side facing away from the lid and a hub; the annular panel-being arranged to engage the inside of the lid of the container when the container is filled with food or drink, and the valve including a stem extending through the hub in the annular panel; and where, during operation, when opening the container, the pressure on that side is less than the pressure on the second side so the annular panel is brought to the lid and the valve stem makes contact with the lid by opening the valve from a closed to an open position. 20. - A container according to claim 19, further characterized in that the hub includes a space surrounding the valve stem through which the gas is arranged to be ejected from the second container when the valve is opened, the space being sealed by the valve when the valve is closed in such a way that the gas does not escape from the container. 21. A container according to claim 19, further characterizes "Jo" because the compressed or liquefied gas comprises HFC-125 and HFC-1520 or propane, butane and HFC-.1340. 22. A container according to claim 20, further characterized in that the compressed or liquefied gas comprises HFC-125 and HFC-1520 or propane, butane and HFC-1340. 23. A filled beverage container comprising an amount of a beverage under pressure with the first container of a container in accordance with claim 21. 24. A filled baby container comprising an amount of a beverage under pressure with the first container of a container according to claim 19. 25.- A filled beverage container comprising a quantity of a drink under pressure with the first container of a container in accordance with claim 20. 26.- A container of filled drink comprising a quantity of a drink under pressure with the first container of a container according to claim 21. 27.- A filled beverage container "comprises a quantity of a beverage or pressure with the first container of a container in accordance with claim 22. 28.- A full beverage container comprising a quantity of a beverage under pressure with the first recipient e) of a container * in accordance with claim 23. 29.- A heat exchange unit according to claim 2, further characterized in that it comprises a swirl generator in the container. 30. A heat exchange unit according to claim 2, further characterized, that the gas is a liquefied gas and the panel is formed of a polymeric material that is moistened by the liquefied gas. 31. An heat exchange unit according to claim 3, further characterized in that the gas is a liquefied gas and the panel is formed of a polymeric material that is moistened by the liquefied gas. 32. A heat exchange unit according to claim 4, further characterized as the gas is a liquefied gas and the panel is formed of a polymeric material that is moistened by the liquefied gas. 33. A heat exchange unit according to claim 5, further characterized in that the gas is a liquefied gas and the panel is formed of a polymeric material that is moistened by the liquefied gas. 34. - A heat exchange unit according to claim 6, further characterized in that the gas is a liquefied gas and the panel is formed of a polyimic material that is moistened by the liquefied gas. 35. A heat exchange unit according to claim 7, further characterized in that the gas is a liquefied gas and the panel is formed of a polymeric material that is moistened by the liquefied gas.