CA2440386A1 - System and method for improving the functioning of air conditioners and solving the water drainage problem - Google Patents

Abstract

One of the most bothering problems with air conditioners is the water drainage problem. When the air conditioner is used for cooling the room, considerable amounts of water can condense on the room unit and are typically moved out through a small tube out of a hole in the wall and dropped there near the external wall. Another typical problem with ordinary single-room split air conditioners is that there is no arrangement for entering fresh air into the room other than keeping the window open or partly open, which can result in considerable loss of efficiency of the air conditioner. Although a wide fresh air tunnel is sometimes used in central air conditioners that are spread over a number of rooms, such a solution does not exist for a single-room split air conditioner. The present invention solves the drainage problem by adding preferably one more pipe to the group of preferably thin pipes that go to the external condenser unit (which is typically either on an outside wall or on the roof), preferably with a pump, so that the water can go also in horizontal or upward directions. This pipe preferably reaches the external condenser, where the water is preferably poured on the radiator there, thus also cooling it down and increasing the efficiency of the air conditioner, and preferably the water evaporates there. Various solutions are shown for the fresh air problem, including for example a heat exchange between incoming air and outgoing air, and transferring also the outgoing air to the external condenser unit. Another improvement shown is increasing the efficiency of the home-unit radiator (and/or of the external unit radiator) by increasing the surface area of its contact with the air.

Description

29/08/03 Yaron Mayer 3/23 Field of the invention:
The present invention relates to air conditioners, and more specifically to a system and method for improving the efficiency of air conditioners and solving the water drainage problem.
Back r~ ound One of the most bothering problems with air conditioners is the water drainage problem. V~hen the air conditioner is used for cooling the room, considerable amounts of water can condense on the room unit and are typically moved out through a small tube out of a hole in the wall and dropped there near the external wall. Sometimes this can be used for example for watering plants, but many times this can be a serious problem that can result in ugly solutions or fights with neighbors. Typically such tubes are also limited in the ability to move them araund since all their parts need to be at least slightly tilted downwards all along the way, due to the sporadic nature of the drops.
Another typical problem with ordinary single-room split air conditioners is that there is no arrangement for entering fresh air into the room other than keeping the window open or partly open, which can result in considerable Loss of efficiency of the air conditioner. Although a wide fresh air tunnel is sometimes used in central air conditioners that are spread over a number of rooms, such a solution does nat exist far a single-raom split air conditioner, so after using them for example for an hour or more the user can get an unpleasant feeling of lack of fresh air in the room. The present invention tries to solve the above prablerns.
Summary of the inyention The present invention solves the drainage problem by adding preferably at least one more pipe to the group of preferably thin pipes that go to the external condenser unit (which is typically either on an outside wall or on the roof), preferably with a pump, so that the water can go also in horizontal or upward directions. This pipe preferably reaches the external condenser, where it is preferably poured on the radiator there, thus cooling it down and increasing the efficiency of the air conditioner. Since when the air conditioner is used for 29/08/03 Yaron Mayer 4/23 cooling, the external radiator becomes quite hot, the water cools it as it evaporates, and thus preferably no water drops down anymore. The pump can be for example running all the time during operations of the air conditioner that need it (for example when used for cooling the room), or for example operated intermittently after a sufficient amount of water has accumulated in the pipe and/or in some temporary container. This pump is preferably activated only when the air conditioner is used for cooling, since when used for heating the problem of water condensation in the room unit does not exist, and also it would reduce the efficiency if the external unit were cooled by water in this mode of operation. Although US patent 6,0 j0,423 issued on June 6, 2000 to Herbert, describes a system for using the condensed water to cool by evaporation a small section in the incoming gas. pipe and/or in the outgoing gas pipe near the room unit, that is much less efficient since the incoming pipe is usually typically already close to the room temperature and the outgoing gas pipe is typically cooler than the room temperature, so the heat gradient is much smaller than when pouring the condensed water on the radiator of the external condenser unit, as described in the present invention. Also, since the incoming gas pipe and outgoing gas pipe are insulted with a heat insulator, exposing a part of them for the evaporation would reduce the insulation.
Although US patent 6,289,688, issued on Sep. 18, 2001 to Carrier Corp.
Mentions directing the condensed water over the radiator of the condenser in a window air conditioner (a single air-conditioner in which the room unit and the condenser are at the two ends of the same box), to the best of my knowledge there is no such solution :for split air-conditioners (in which, as explained above, there is a separate room unit and a separate condenser unit, typically outside on an external wall or on the roof), which are the most common type of air conditioners. The solution in this case is more complicated since it requires adding the additional pipe to the group of pipes that go between the two units and adding a pump which preferably takes into account the sporadic nature of the condensed 'eater drops for transferring them efficiently to the external unit, as explained below. Also, the carrier patent indicates that drainage of excess water is still needed anyway. The present invention tries to solve the problem so that preferably no drainage problem remains.

29/08/03 Yaron Mayer 5/23 There are a number of possible solutions for the fresh air problema 1. One possible variation is using one or more pipes, preferably with a pump, for transferring for example cold air from the room out to the external condenser unit, thus compensating for the need to cool more air in the room by making the external condenser cooler. This can be combined for example with any opening that allows fresh air into the room, so that new air from outside comes in instead of the cold air that has been taken out through said pipe.

2. Another possible variation is using one or more preferably small pipes, preferably with a pump, for entering new air from outside preferably straight into the radiator of the room unit, which is much more efficient than just inserting new air into the room, since this works more efficiently with a higher heat difference. The pipe can be for example either wider with a preferably weaker pump (or for example no pump at all, so that for example the air is sucked in due to the movement of the air in the room unit), or smaller with a preferably stronger pump.

3. Another possible variation is to use a heat-exchange so that some of the cold air from the room is used for cooing an area where new air comes in. However, in all of the above variations, preferably the outgoing air pipe preferably collects air from the room at a point that is preferably as far as possible form the point where the fresh air enters, for example at the furthest edge of the room unit or for example a~t a more distant place away from the room unit.
Of course, various combinations of the above and other variations are also possible, such as for example combining any of these features or elements in them or for example using the same pipe for transferring both cold air from the room and the condensed water to the external condenser unit.
Another possible variation for increasing the efficiency of the air conditioner in general a to use a radiator battery with a m~re efficient 3-I7 spreading and/or more efficient surface interaction with the air. For example there exist G batteries, in which the radiator units are U-shaped so that they cover a larger area than normal radiators, however this is still not optimal.
Higher efficiency can be created by preferably filling the room unit and/or the external condenser unit with multiple layers of radiators so that the radiator 29/08/03 Yaron Mayer 6/23 becomes much more 3-Dimensional. A few possible configurations for this are shown in Figs. 3a-f.
Brief description of the drawings Fig. 1 is an illustration of a preferable example of solving the drainage problem by adding preferably at least one more pipe to the group of pipes that go to the external condenser, preferably with a pump, so that the water can go also in horizontal or upward directions.
Figs. 2a-c are illustrations of a few preferable variations of solving the fresh air problem for single-room split air-conditioners.
Figs. 3a-f are illustrations of a few preferable examples of improving the efficiency of room-unit radiators and/or external condenser units radiators by increasing the surface area of the radiators and/or increasing the length of the air path near them.
Important Clarification and Glossary-:
All these drawings are just exemplary drawings. 'They should not be interpreted as literal positioning, shapes, angles, or sizes of the various elements. Throughout the patent whenever variations or various solutions are mentioned, it is also possible to use various combinations of these variations or of elements in them, and when combinations are used, it is also possible to use at least some elements in them separately or in other combinations. These variations are preferably in different embodiments.
In other words: certain features of the invention, which are described in the context of separate embodiments, may also be provided in combination in a single embodiment. Conversely, various features of the invention, which are described in the context of a single embodiment, may also be provided separately or in any suitable sub-combination.
Detailed description of the ypreferred embodiments All of the descriptions in this and other sections are intended to be illustrative examples and not limiting.

29/08/03 Yaron Mayer 7/23 Referring to Fig. 1, I show a preferable example of solving the drainage problem by adding preferably one more pipe {3) to the group of pipes (4,5) that go between the room unit (1) to the external condenser (2) for carrying the condensed water from the room unit (1), preferably with one or more pumps (7), so that the water can go also in horizontal or upward directions.
This pipe (3) preferably reaches the external condenser (2), where the condensed water is preferably poured on the radiator there, thus cooling it down and increasing the efficiency of the air conditioner. Since when the air conditioner is used for cooling the external radiator can become quite hot, the water evaporates as it cools it and thus preferably no water drops down anymore, thus preferably achieving better efficiency both in evaporation and in cooling the condenser unit. The pump (7) can be for example running all the time during operation of the air conditioner that need it (for example when cooling the room), or for example operated intermittently after a sufficient amount of water has accumulated in the pipe and/or for example in some temporary container. This can be done for example by using a container with a floater unit, so that the pump is preferably activated after the condensed water in the container has reached a certain level. This is more preferable since transferring each time irregular droplets would be problematic due to the mix of air and water in the pipe. The pipe that conducts the ccmdensed water to the radiator of the external condenser is preferably thin (for example made of preferably cheap rubber or plastic or nylon, etc.) and the water is preferably moved at a low speed so that the drops reach the external radiator at a rate sufficiently slow to preferably evaporate completely while cooling it. This preferably slow rate means also that the pipe does not need much energy.
Another possible variation is that for example at tlxe external condenser unit if the condensed water still does not evaporate completely or sufficiently after flowing over the condenser's radiator, preferably the water is collected again for example in a local bottom collector and preferably poured again one or more times (preferably with a local pump) over the radiator, preferably until it has completely evaporated (or for example until a sufficient percent of it has evaporated or until the water level is the local bottom container is low enough). Another possible variation is to add at the condenser unit also for example a preferably top container (especially for example if the water is transferred there in batches each time after sufficient condensed water has accumulated in the room unit), which receives the condensed water from the room unit pump and preferably acts as a buffer, so that regardless of the sporadic nature of the arrival of the water there, it preferably releases small 29/08/03 Yaron Mayer 8/2~
drops over the external. unit's radiator, preferably slowly, for example by using one or more small holes, and/or for example sprays intermittently preferably by pressure minute drops from above and/or from below and/or from the sides of the radiator. Another possible variation is for example to use the bottom collector of the external unit also for this, so that for example the pump there sprays droplets slowly again from above over the radiator or for example sprays intermittently preferably by pressure minute drops from above and/or from below andlor from the sides of the radiator (for example in a way similar to a plant watering device in the mode that sprays a cloud of minute water droplets). This pump is preferably activated only when the air conditioner is used for cooling, since when used for heating the problem of water condensation in the room unit does not exist, and also it would reduce the efficiency if the external unit were cooled by water in this mode of operation. This solution is important also for example for portable air conditioners, which are similar to a non-mobile air conditioner, except~that the room unit and the external unit can be moved freely and the gas pipes are typically flexible, and the external condenser unit is typically put for example in the balcony. In these air conditioners the water drainage problem is typically even more disturbing since in the prior art there is no drainage arrangement, except for example pouring the water through the balcony's drainage. Another possible variation is to spread the condensed water for example over a capillary sleeve that surrounds the group of pipes that go between the room unit and the external condenser unit, for example to a length of 1 or more meters. 'This can increase the efficiency of the evaporation of the water and save the need for a pump, although it has negligible effect on cooling the gas pipes since it is on top of the heat insulator that surrounds the group of pipes. Another possible variation is to use for example some preferably decorative capillary cloth (or other capillary material) that covers for example 1 or more square meters on the external side of the building and/or for example on an inner side of a wall within the cooled room, so that the condensed water can evaporate eff ciently and also help cool the wall at the same time. If at least part of it is evaporated again within the room, it has the further advantage of preventing the air in the room from becoming too dry.
Another possible variation is to add for example capillary connections in addition or instead to the above described bottom water collector at the external condenser unit, so that for example if the condensed water has not evaporated sufficiently after being poured on the radiator of the external condenser, then it preferable spreads by capillary connections for example to a 29/08/03 Yaron Mayer 9/23 capillary sleeve that covers the group of pipes that go between the external unit and the room unit and/or for example reaches a capillary cloth that is spread for example near the external unit. Another possible variation is to collect the condensed water in a container inside the room, so that it can be used for example as drinking water or adding i.t for example to a nearby drinking bar. Another possible variation is for example to install an infrastructure in the building that collects condensed water from air conditioners for various purposes, such as for example watering the garden, etc. Of course, various combinations of the above and other variations are also possible.
Deferring to Figs. 2a-c, I show illustrations of a few preferable examples of solving the fresh air problem for single-room split air-conditioners. Fig. 2a shows a variation of using one or more pipes (13), preferably with a pump (17), for transferring for example cold air from the room out to the external condenser unit (2), where preferably the cold air is released after blowing preferably directly it at the hot radiator of the condenser, thus compensating for the need to cool more air in the room by making the external condenser cooler. This can be combined for example with any opening (I4) that allows fresh air into the room, so that new air from outside comes in instead of the cold air that has been taken out through said pipe (13). Another possible variation, shown in Fig. 2b, is using one or more preferably small pipes (14) with a pump (18) for entering new air from outside preferably straight into the radiator of the room unit (1), which is much more efficient than just inserting new air into the room, since this works more eff ciently with a higher heat difference (gradient). The pipe (14) can be for example either wider with a weaker pump, or smaller with a preferably stronger pump. Another possible variation, shown in Fig. 2c, is to use also a heat-exchange (15), so that some of the cold air coming out of the room through pipe 16, preferably with the aid of a pump ( 19), is used for cooing the area where new air comes in through pipe 14, preferably with the aid of a pump ( 1 ~). Of course, various combinations of the above and other variations are also possible, such as for example combining the features of Fig. 2b or 2c or parts of them with the features of Fig. 1 and/or 2a or parts of them. For example, the same pipe of outgoing cold air { 16), that preferably uses also a heat exchange with the incoming air of pipe 14, can continue to the external condenser and fnally release the cold air there. Either way, whether the cold air is brought to the radiator of the external condenser unit in the same pipe with the condensed 29108/03 Yaron Mayer 10/23 water on in a separate pipe, this can also help the water further evaporate from the radiator. (Anyway, the configuration of Figs. 2b & 2c of course contains also at least the normal connection with the condenser unit (not shown the drawing). The heat exchange can be done for example by having pipes 14 and 19 coupled to each other at least part of the way (but preferably over the entire length where they are near each other), so that preferably both pipes are made from a good heat conductor such as for example metal, or for example the two pipes are actually two conduits within a larger pipe, preferably with some zig-zaggy border between them (In this case if the outgoing cold air pipe 16 continues to the condenser, then preferably at the end of the combined part pipe 16 continues alone to the condenser. Preferably these two pipes or the single divided pipe are flat and wide, so that the surface area of the heat exchange is bigger and the air flows near it. However, due to the relatively small heat difference (gradient) between the incoming air' and the outgoing air, the efficiency of this heat exchange is limited anyway. In all of the above variations, preferably the outgoing air pipe preferably collects air from the room at a point that is preferably as far as possible form the point where the fresh air enters, for example at the furthest edge of the room unit or for example at a more distant place away from the room unit. Another possible variation is that there are for example at least two separate entry points for fresh air, for example one at a low point (for example near the floor) and one at a high point (for example near the ceiling), so that preferably in the winter cold fresh air is allowed to come in from the high inlet and thus sinks down, and in the summer preferably hot fresh air is allowed to come in from the low inlet and thus goes up, thus improving the mixing in the room. Another possible variation is for example the opposite of this, so that cold fresh air (for example in the winter) is allowed in from the bottom and hot fresh air (for example in the summer) is allowed in from the top, which can have the effect that the user does not feel the fresh air with the different temperature until it mixes with the other air in the room, so that by the time the fresh air reaches the user it is already closer to the temperature within the room. In al/ of the above variations preferably the incoming air pipe or inlet and/or the outgoing air pipe are preferably wide enough so that a sufficient volume of air can be moved in or out quickly enough without the use of too much pressure, since having to use a too strong pump could cause noise problems and increase the energy consumption, as well as for example heating the air because of the pressure.

29/08/03 Yaron Mayer l 1123 Referring to Figs. 3a-f, I show illustrations of a few preferable examples of improving the efficiency of room-unit radiators or external condenser unit radiators by increasing the surface area of the radiators and/or increasing the length of the air path near them. For example there exist G batteries, in which the radiator units are IJ-shaped so that they cover a larger area than normal radiators. Higher efficiency can be created by filling the room unit and/or the external condenser unit with multiple layers of radiators so that the radiator becomes more 3-Dimensionally spread. Fig. 3a shows a variation wherein the radiator (31 ) is shaped like a rolled Rollada, so that more layers exist than in the G battery. Fig. 3b shows a variation where .radiators (for example in a vertical orientation} are stacked next to each other so that they fill more efficiently the 3-dimensional space. Preferably each of the planes (31-35) is itself shaped like a typical air-conditioner radiator. Another possible variation is that one or more radiators are spread in a 3 dimensional direction instead of two-dimensional, so that the curvature itself is 3d-imensional, for example like saddle-shaped hyperspace or like fractals. Another possible variation is that the radiator itself is rotating - for example in the shape of a round rotating turbine, so that preferably no separate ventilator is needed and greater efficiency of spreading the cold (or hot) air is achieved and/or the rotating radiator itself also pu;>hes the air. 13y rotating the radiator fast enough, preferably the air that moves near it reaches optimum exposure to its surface area. On the other hand, unlike old air conditioners in which the air typically went through the thickness of the radiator (for example if the radiator was for example SOcm x SOcm and with a thiclcness of for example 4 cm, the air went through the 4 cm thickness from one side to the other like through a sieve, as shown in fig. 3c, where pipes 37a-c represent the pipes of condensed gas and fins 36a-c are the heat transfer elements), in modern air conditioners the air typically moves between two such radiators, as shown in Fig. 3d, so that part of the air moves through the gap between the two radiator parts and part moves through each of the two radiator parts, thus moving also between the fins. Although the fins are drawn fox clarity with large distances between them, typically there are many more fins and with smaller distances between them and also there are typically more gas pipes between them. This has the advantage that the air spends more time near the radiator elements due to the longer path, and also the fact that part of the air moves through the gap between the two radiators allows more flexibility in the speed of pushing the air. Therefore, one possible improvement on this is that preferably the gap between the two radiators can be varied for example automatically and/or by 29/08/03 Yaron Mayer 12/23 user control, by a mechanism in the air conditioner, so that according to the desired temperature and/or air speed the gap can be adjusted dynamically in order to further optimize it. Preferably this is done by moving one or both of the radiators in relation to the other while sliding it within side walls which preferably touch closely the sides of the radiators and cover the maximum gap, so that the side walls always surround the gap from the sides (Another possible variation is to use for example a flexible material for the side walls, such as for example a 'thin flexible copper foil, but that is less preferable).
Also, If the Rollada solution described in Fig. 3a is used, then preferably the air is moved through it spirally preferably by adding for example a thin metal plate on one side of the radiator before folding it into the Rollada shape, thus keeping the plate between each two layers of the Rollada., but in order to let the air out eventually preferably the air is finally moved out for example sideways so that for example the most inner layer of the Rollada finally releases the air like a pipe to one of the sides. (Another possible variation is for example to let the air path straight across the layers of the Rollada, but that is less efficient since this means that the air spends less time at the Rollada).
Another possible variation is to fold the radiator for example in some S shape instead of a >'T, thus increasing the path of the air without the complexity of the Rollada. The S shape can be made for example from a single radiator, preferably with plates on both sides, so that the air preferably flows just along the lengths of the S-shaped fins (36a-d) between the fins, as shown in fig.
3f, or far example made from two such radiators bent together like an S, so that the air can also move in the gap between them. In order to create this structure preferably each fins is designed in advance in the S shape instead of a straight line (for example by cutting a plate into multiple S shapes neighboring each other), and then the S shaped fins are for example put side by side with the desired gaps between them and then the gas pipes are preferably moved through holes in the fins and connect between the them like in a normal radiator, and then preferably the S is covered by preferably two metal plates that are bent in the S shape, thus creating the bottom and the top of the S
shaped path. Another possible variation is for example to repeat the bent S
shape more than once, :for example like an accordion o:r wavy shape, so that the air path near the radiator fins becomes even longer. Preferably the external contours of the wavy shape are covered by an acoustically isolating material in order to reduce the noise to minimum. Another possible variation is to make the fins for example much thinner and v~ith even smaller distances between them (However, preferably the fms remain with a sufficiently large 29/08/03 Yaron Mayer 13/23 ratio between the thickness of each fin and the gall between each two ins, so that for example if the gap is lmm, preferably each fin is for example with a thickness of O.lmm or less). Another possible variation is to use more than 2 radiator plates, bent or otherwise, (for example like in Fig. 3b). In this case the air can for example move through each layer like the air direction in fig. 3c or move along the layers and between them, like the air direction in Fig. 3d. (Of course both in this case and in the case of for example wavy shapes other directions or combinations of directions of the air flow can also be used, preferably in different embodiments, such as for example up-to-down instead of down-to-up or for example some diagonal direction or for example some combination of longitudinal movement together with side-crossing movement, etc.) As explained above, the above configurations can be used for example with the room unit radiator and/or with the radiator of the external condenser.
If dynamically variable gap is used between two (or more) S shaped radiators (or radiators with more curves) then preferably the curved radiators fit for example one on top of the other, so that simply rnovinl; for example one of them to the top and sideways at the same time achieves the desired effect of increasing the gap and Tvice versa. Another possible variation is for example changing the angles or direction of the air :dow though the radiators dynamically, preferably automatically, for example according to the desired temperature and/or air speed, and/or rotating for example the fns of the radiator or some of them or parts of them accordingly. Of course, various combinations of the above and other variations are also possible.
V6~hile the invention has been described with respect to a limited number of embodiments, it will be appreciated that many variations, modifications, expansions and other applications of the invention may be made which are included within the scope of the present invention, as would be obvious to those skilled in the art.

Claims (18)

1. A system for solving the drainage problem of condensed water in split air conditioners, comprising: At least one additional pipe added to the group of pipes that go between the room unit to the external condenser, so that said added at least one pipe can carry the condensed water from the room unit of the air conditioner to the external condenser unit.

2. The system of claim 1 wherein said water is poured on the radiator of the external condenser unit, thus cooling it down and increasing the efficiency of the air conditioner.

3. The system of claim 2 wherein at least one pump is also used, so that the water can go also in horizontal or upward directions, and at least one of the following features exists:
a. Said pump is running all the time during operations of the air conditioner that need it.
b. Said pump is operated intermittently after a sufficient amount of water has accumulated in the pipe.
c. At the condenser there is a container which receives the condensed water from the room unit pump and acts as a buffer, so that regardless of the sporadic nature of the arrival of the water there, it slowly releases small drops over the external unit's radiator and/or sprays intermittently by pressure minute drops from above and/or from below and/or from the sides of the radiator.

4. The system of claim 1 wherein if the condensed water has not evaporated sufficiently after flowing over the condenser's radiator, the water is collected again in a bottom collector at the condenser and at least one of the following is done:
a. The water is poured again one or more times over the radiator.
b. There are capillary connections in said bottom water collector, so that if there is still excess water it can spreads by capillary connections to a capillary sleeve that covers the group of pipes that go between the external unit and the room unit and/or it can reach a capillary cloth that is spread near the external unit.
c. The bottom collector has a pump that sprays intermittently by pressure minute drops from above and/or from below and/or from the sides of the radiator.

5. A system for solving the drainage problem of condensed water in air conditioners comprising at least one of:
a. A system for spreading the condensed water over a capillary sleeve that surrounds the group of pipes that go between the room unit and the external condenser unit, for a sufficient length, in order to increase the efficiency of the evaporation of the water and save the need for a pump.
b. A system for spreading the condensed water over a capillary cloth that covers an area at the external side of the building and/or on an inner side of a wall within the cooled room, so that the condensed water can evaporate efficiently and also help cool the wall at the same time.

6. A system for solving the fresh air problem for single-room split air-conditioners comprising at least one of:
a. A system for transferring cold air from the room out to the radiator of the external condenser unit, thus compensating for the need to cool more air in the room by making the external condenser cooler, combined with any opening that allows fresh air into the room instead of the cold air that has been taken out.
b. A system for entering new air from outside directly into the radiator of the room unit.
c. At least two separate entry points for fresh air, one at a low point and one at a high point, so that one of them is used when the air outside is colder than the room and the other is used when the air outside is warmer than the room.

7. The system of claim 6 wherein at least one of the following features exists:
a. The fresh air is pushed in with the aid of at least one pump.
b. The outgoing air is pushed with at least one pump.
c. A heat-exchange is also used, so that some of the cold air coming out of the room is used for cooing the area where new air comes.

8. A system for improving the efficiency of at least one of room-unit radiators and external condenser unit radiators of air-conditioners, comprising at least one of:
a. More than 2 layers of radiators, b. Multiple curves in the air path at the radiator area in order to lengthen said path, and c. A system that allows dynamically changing the distance between two or more radiators.

9. The system of claim 8 wherein at least one of the following features exist:
a. The radiator is shaped like a rolled Rollada.
b. The radiator is shaped like a rolled Rollada and the air is moves across it.
c. The radiator is shaped like a rolled Rollada and the air is moved through it spirally by adding a plate between each two layers of the Rollada, but in order to let the air out eventually the air is finally moved out sideways.
d. Multiple radiators are stacked next to each other so that they fill more efficiently the 3-dimensional space.
e. The curvature of the radiator itself is 3d-imensional.
f. The curvature of the radiator saddle-shaped.
g. The curvature of the radiator is shaped like fractals.
h. The radiator itself is rotating.
i. The gap between the two or more radiators can be varied automatically and/or by user control, by a mechanism in the air conditioner, so that according to the desired temperature and/or air speed the gap can be adjusted dynamically in order to further optimize it.
j. The radiator is folded in one or more S shapes or wavy shape, thus increasing the path of the air.
k. The angles or direction of the air flow though the radiators can be changed dynamically, according to the desired temperature and/or air speed, and/or the fins of the radiator or some of them or parts of them can be rotated accordingly.

10. A method for solving the drainage problem of condensed water in split air conditioners, comprising the steps of: Using at least one additional pipe ion addition to the group of pipes that go between the room unit to the external condenser, and letting said added at least one pipe carry the condensed water from the room unit of the air conditioner to the external condenser unit.

11. The method of claim 10 wherein said water is poured on the radiator of the external condenser unit, thus cooling it down and increasing the efficiency of the air conditioner.

12. The method of claim 11 wherein at least one pump is also used, so that the water can go also in horizontal or upward directions, and at least one of the following features exists:
a. Said pump is running all the time during operations of the air conditioner that need it.
b. Said pump is operated intermittently after a sufficient amount of water has accumulated in the pipe.
c. At the condenser there is a container which receives the condensed water from the room unit pump and acts as a buffer, so that regardless of the sporadic nature of the arrival of the water there, it slowly releases small drops over the external unit's radiator and/or sprays intermittently by pressure minute drops from above and/or from below and/or from the sides of the radiator.

13. The method of claim 10 wherein if the condensed water has not evaporated sufficiently after flowing over the condenser's radiator, the water is collected again in a bottom collector at the condenser and at least one of the following is done:
a. The water is poured again one or more times over the radiator.
b. There are capillary connections in said bottom water collector, so that if there is still excess water it can spreads by capillary connections to a capillary sleeve that covers the group of pipes that go between the external unit and the room unit and/or it can reach a capillary cloth that is spread near the external unit.
c. The bottom collector has a pump that sprays intermittently by pressure minute drops from above and/or from below and/or from the sides of the radiator.

14. A method for solving the drainage problem of condensed water in air conditioners comprising at least one of the following steps:
a. Spreading the condensed water over a capillary sleeve that surrounds the group of pipes that go between the room unit and the external condenser unit, for a sufficient length, in order to increase the efficiency of the evaporation of the water and save the need for a pump.
b. Spreading the condensed water over a capillary cloth that covers an area at the external side of the building and/or on an inner side of a wall within the cooled room, so that the condensed water can evaporate efficiently and also help cool the wall at the same time.

15. A method for solving the fresh air problem for single-room split air-conditioners comprising at least one of the following steps:
a. Transferring cold air from the room out to the radiator of the external condenser unit, thus compensating for the need to cool more air in the room by making the external condenser cooler, combined with any opening that allows fresh air into the room instead of the cold air that has been taken out.
b. Entering new air from outside directly into the radiator of the room unit.
c. Using at least two separate entry points for fresh air, one at a low point and one at a high point, so that one of them is used when the air outside is colder than the room and the other is used when the air outside is warmer than the room.

16. The method of claim 15 wherein at least one of the following features exists:
a. The fresh air is pushed in with the aid of at least one pump.
b. The outgoing air is pushed with at least one pump.
c. A heat-exchange is also used, so that some of the cold air coming out of the room is used for cooing the area where new air comes.

17. A method for improving the efficiency of at least one of room-unit radiators and external condenser unit radiators of air-conditioners comprising at least one of the following steps: Using multiple layers of radiators, Creating multiple curves in the air path at the radiator area in order to lengthen said path, and Using dynamically changeable distance between two or more radiators.

18. The method of claim 17 wherein at least one of the following features exist:
a. The radiator is shaped like a rolled Rollada.
b. The radiator is shaped like a rolled Rollada and the air is moves across it.
c. The radiator is shaped like a rolled Rollada and the air is moved through it spirally by adding a plate between each two layers of the Rollada, but in order to let the air out eventually the air is finally moved out sideways.
d. Multiple radiators are stacked next to each other so that they fill more efficiently the 3-dimensional space.
e. The curvature of the radiator itself is 3d-imensional.
f. The curvature of the radiator saddle-shaped.
g. The curvature of the radiator is shaped like fractals.
h. The radiator itself is rotating.
i. The gap between the two or more radiators can be varied automatically and/or by user control, by a mechanism in the air conditioner, so that according to the desired temperature and/or air speed the gap can be adjusted dynamically in order to further optimize it.
j. The radiator is folded in one or more S shapes or wavy shape, thus increasing the path of the air.
k. The angles or direction of the air flow though the radiators can be changed dynamically, according to the desired temperature and/or air speed, and/or the fins of the radiator or some of them or parts of them can be rotated accordingly.