DE951934C - Cooling system - Google Patents

Description

Refrigeration system The present invention relates to a novel one Cooling system for: walk-in cold rooms where it is possible to use the in single room housed evaporator coils in several separate from each other Rooms to maintain different temperatures, with the help of the evaporator or evaporators only the air of the coldest room is cooled immediately, while the desired Temperatures of all other rooms by branching off from the room air of the coldest room Subsets of cold air are generated and maintained.

So far, with automatically controlled refrigeration systems with several Cooling rooms of different temperature for each individual room 'special evaporates needed for what, apart from the relatively complicated and accordingly failure-prone switching devices and relays, the expensive isolated supply lines come to the individual evaporators present in each cold room.

In accordance with the present invention there is or are those of a suitable strong chiller charged evaporator in that of the various Cold rooms, which must be the lowest temperature, which is known per se Thermostats od. The like. It is ensured that the desired temperature in this ate Space is maintained.

The other rooms with a higher temperature are with the Freezer room through communicating tubes or '. like connected, in such a way, that the one sucked off at the highest point of these cold rooms and a much higher one Air having temperature is supplied to the evaporator in the so-called evaporator chamber at the lowest temperature corresponding to the freezer compartment (evaporator compartment) is cooled while from this room - expediently at different altitudes - one required to generate and maintain the desired higher temperature Part of the cold air in the freezer room which has a higher temperature Is supplied to rooms.

Depending on the circumstances, it is also possible to use the cold Air from the freezer room cascades over the next cooler rooms, or at least according to the principle of a cascade, the cold rooms each having a higher temperature feed, with the air circulation, which is particularly important in the case of larger temperature differences is possible through the different specific weights of a different Temperature exhibiting air and, if necessary, additionally by fans Od. Like. And controlled by variable passage cross-sections of the connecting lines can be effected.

For this purpose are in the the contract between the individual Inlet and / or outflow lines, adjustable valve flaps or the like. Provided that - if necessary simultaneously with .dien for the circulation ventilators provided for air - moved or switched, preferably by means of the constant temperature set in the individual cold rooms Thermostats od.d@gl.

Due to the preferably different heights of the air outlet pipes in the freezer. achieves that the coldest flowing out of the evaporator Air always at least the lower part of the cold room exhibiting the lowest temperature takes, which in this way always has the desired temperature.

The performance of the refrigeration machine, the entire evaporation area of which is in which the lowest temperature is expended in the refrigerator is after. the Measure the total cooling capacity in the various cold stores. With the help of the invention it is possible with a refrigeration system with two refrigeration rooms, their permanent temperature for example -I- 2 and -I- 6 ° C, with the same chiller without To increase their performance, a freezer compartment with a permanent temperature of for example to install -8 ° C and less. This is done by the cold room a part branched off in which the evaporator previously located in the two rooms as close as possible to the ceiling while the rooms are at constant temperatures from -f- 2 and -1- 6 ° C with this newly created freezer compartment according to the invention communicate.

According to the invention, the thermostat in the d iie lowest Temperature exhibiting cold room preferably only switching the refrigerator on and off caused, while by the other a higher temperature having cold rooms the thermostats located in the fans located in the air supply ducts and / or valve flaps or dg1. are controlled in such a way that there each desired room temperature is maintained, advantageously by the at the cold air flowing in at the highest point of this room at the same time mixing caused by the air in these rooms.

In household refrigerators, the cooling coils are usually located on the outside of a special - @ housed in the refrigerator, as a freezer compartment serving shaft-like container, while the one lying above freezing point Temperature in the actual refrigerator due to the drainage from the cooling coils Cold air is maintained.

It has already been proposed to use one of sale containers wrapped around the evaporator coils or containing the evaporator coils to be housed in a special compartment of the refrigerator, in which Brine containers special freezer containers, such as an ice machine, conservator, Freezer or the like. Are.

The refrigerator compartment separated from this freezer compartment with temperatures below 0 ° C with a temperature of over 0 ° C is attached to the brine tank by a Cooled pipe coil, which forms a ring line communicating with the cooling room: in which by means of a fan controlled by a thermostat the cold room air is circulated.

There are also household refrigerators known, in front of which the freezer compartment containing the evaporator coils of which has a higher temperature having cooling space through a more or less heat-permeable partition is separated, wherein the air located in the cooling space: by means of a through a Thermostat-controlled fan or the like on this with the freezer compartment in heat exchange standing partition wall is passed.

In contrast, according to the present invention, each part .the air in the freezer (evaporator) at a temperature of below o'C in one or more cold rooms with different ones above the temperature of the freezer room lying temperatures branched off, whereby by mixing with the in these cold rooms air at a higher temperature - preferably with the aid of a Thermostats - the desired cooling temperature that can be set at will is maintained.

In the drawing, a schematic embodiment is a according to the principle of the present invention constructed cooling system with a freezer compartment (Evaporator room) and five cold rooms are shown, in which the air from the one Higher temperature cold rooms is sucked off, while at the same time the room with the lowest temperature - according to the desired temperature at a certain altitude - cold air of lower temperature flows in.

In detail, Fig. I shows a horizontal section through a cooling system according to the present invention with six cold rooms of different temperatures, at the level of the line I-I of FIG. 2, FIG. 2 shows a vertical section along the line II-II of Fäg. i.

In the drawing, everything is self-evident under Forflassuna Details in a purely schematic manner only apply to the present Invention heviehenden .Teile shown.

The cooling system has six cooling rooms A, B, C, D, E and F arranged side by side, in which continuous temperatures of, for example, o, -8, -h 3, + 6, -2 #bzw. + io ° C should prevail.

In the freezer compartment B with a constant temperature of -8 ° C st on the back wall a little below the ceiling that extends over the entire width of the freezer compartment Arranged evaporator i of a refrigeration machine, not shown, which consists of several Individual units can be assembled.

Above the evaporator i end the line pipes 2, 3, 4, 5 and 6 leading to the individual cold rooms A, C, D, E and F, in which the .Zemtri.fugalventnlatoreri 7, 8, g, 1o and ii in each case below the ceiling from the individual cooling rooms A, C, D, E and F sucked, the highest temperature of the respective room exhibiting air is fed to the evaporator i, where it cools down and in the lower part of the freezer room B with a A permanent temperature of -8 ° C flows off.

The lines 12, 13, 14, 15 and 16 communicating with rooms A, C, D, E and F open at different heights in the side walls and in the rear wall of the freezer room (Vcrdampferraumes) B , each below the ceiling of these cold rooms end in a shower-like mouthpiece. Corresponding to the suction of the air located directly below the ceiling by the fans, the cold air flowing from the freezer room B flows through the lines 12 to 15 from the shower heads in finely divided form into the cold rooms and mixes with the room air until the desired one flows through a thermostat, not shown, controlled air temperature has set, whereupon the fan in question is switched off.

In the tubes: 2 to 6 and / or in the tubes 12 to 16 can additionally Valve flaps, not shown, are provided through which the flow cross section and accordingly the flow resistance is varied., diaß in .den sets the required temperature in each individual cold room. Switching on and off the centrifugal fans and, if necessary, the setting of the feed and / or discharge pipes provided valve flaps takes place automatically by the In the individual rooms housed, not shown thermostats od. Like.

Claims (7)

PATENT CLAIMS: i. Cooling system with several accessible cold rooms different temperature, characterized in that the evaporator or evaporators located in the coldest of the various cold storage rooms, which in turn are and drain pipes communicate with this coldest room, the drain being the Warm air and the inflow of cold air from or to the individual cold rooms to or from from the evaporator room through thermostats located in the various rooms is controlled, while switching the refrigeration machine on and off in itself .known Way by a thermostat located in the evaporator or the like. Controlled will. 2. Küh'lan'lage according to claim i, characterized in that in the supply and Drain lines of the individual cold rooms, valve flaps or the like. are arranged, through which the flow resistance, in the lines - preferably by means of Thermostats arranged in the individual cold rooms ad. Like. -controlled. 3. Cooling system according to claim i or 2, da.-by gelcennzßichnet that in the inflow lines or discharge lines of the individual cold rooms fans, - preferably centrifugal ventilators, are arranged, which-by the thermostats located in the individual cooling rooms be switched on and off. 4. Cooling system according to one of claims i to 3, characterized characterized @ that the tubes through which the air from the individual cooling rooms sucked off and fed to the evaporator chamber, end above the evaporator, so that they only after cooling by the evaporator -in the lower part of the evaporator chamber flows off. 5. Cooling system according to one of the preceding claims, by the fact that the suction openings of the suction lines of the individual Cold rooms are arranged in the immediate vicinity of the ceiling. 6. Cooling system after a of the preceding claims, characterized in that the cold air from .dem coldest room to the pipes in the walls of the cold storage rooms start in the coldest room, the height position is preferably chosen so that d ate @ the opening of the line for the next colder room below the opening the line for the next warmer room is arranged. 7. Cooling system according to one of the preceding claims, characterized in that the lines feeding the cold air from the evaporator room end below the ceiling and are provided with a shower-like head from which the cold air supplied flows out like a water shower and seich intimately mixed with the air in the cooling space. B. Cooling system according to one of the preceding claims, characterized in that the individual cooling rooms are combined to form a block, the arrangement being expediently chosen so that the coldest rooms are protected against excessive loss of cold by adjacent cooling rooms. Publications considered: Swiss Patent No. 239 o88; USA. Patent Nos. A 481616, 2 5a6 o63, 2598917.