Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B30—PRESSES
  • B30B—PRESSES IN GENERAL
  • B30B9/00—Presses specially adapted for particular purposes
  • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
  • B30B9/04—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using press rams
  • B30B9/047—Control arrangements

Definitions

• the invention relates to a method for controlling the juicing of organic products by means of a press which is provided with a press chamber having a drainage device and a drivable press member.
• the pressing member being predominantly designed as a piston or flexible membrane.
• the entire pressing process takes place in several pressing cycles, which are carried out in subsequent intervals.
• the pressing member is first pressed persistently against the mash occurring in the pressing room and then pulled back into a rest position.
• this return stroke movement the mash of fruit, grapes or the like is loosened for example by rotating the press container for a certain time.
• the apprenticeship to be carried out should convey the implementation of ideal juicing processes and the savings in energy expenditure and wear.
• this object is achieved in that the pressing stroke of a pressing cycle is ended at the earliest when the maximum juice output obtained from this pressing cycle is reached.
• the pressing cycle has lasted since the pressing stroke of the previous pressing cycle was interrupted and includes the return stroke of the pressing member as well as a possible loosening phase and the pressing stroke of this pressing cycle.
• the first pressing cycle after the press has been filled is involved in the use of the method according to the invention, in that it starts the procedural procedure immediately upon reaching the maximum average juice output at the end of this pressing stroke.
• the duration of a pressing cycle depends on the maximum average juice output of two subsequent pressing cycles, the average juice output corresponding to the juice output obtained in the cycle time used for this purpose as an average value.
• the start of the next press cycle takes place after the end of the press stroke by initiating the return stroke of the press member.
• the maximum average juice output LQ of a pressing cycle is calculated from the amount of juice Q obtained per unit of time over a certain period of time, which increases more strongly at the beginning of the pressing stroke and then reaches the maximum value of the juice output due to the diminishing compressibility of the pressed material. At this critical point, optimal economy is achieved with every single press cycle.
• This general definition takes into account the subsequent press cycle, the maximum average juice output of which is known to be lower than that of the previous cycle, and reduces the juice output difference of two press cycles in favor of the economy of the process.
• a further benefit can be achieved if the pressing stroke of a pressing cycle is not ended after the expected maximum average juice output LQ (K v ) of the next pressing cycle, which takes account of the gentle mash treatment.
• a press of the design has proven to be advantageous in which the juice outlet arrangement or the juice collecting device has a measuring device which determines the amount of juice leaving the press and which is connected to a processor and this in turn to a device controlling the drive elements of the press.
• Fig. 1 is a schematic representation of the inventive method
• Fig. 2 is a schematic representation of the inventive method in an improved version.
• Fig. 1 provides a graphic representation of the sequence of the method for controlling the juicing of organic products, primarily fruit, fruits, maid ben or the like.
• Agricultural products by means of a press based on a quantity (Q) / time (T) diagram.
• Q quantity
• T time
• the pressing member moves from the rest position against the mash and remains in the pressing position until the maximum average juice output LQ from this pressing cycle has been reached.
• the juice yield initially increases more and later flattens, with the amount of juice Q increasing steadily, while on the other hand the average juice output, ie the average amount of juice reached up to the assumed point in time, decreases after reaching its maximum value.
• the curve of the current juice output Q increases steeply at the beginning and, after reaching the maximum output, falls with almost the same slope and is asymptotic.
• Below the apex of the Q curve is the change point on the middle juice performance curve, after which the increasing increasing average juice performance% changes into a section which is flatter towards the apex and then drops again.
• the vertex is at the same time the interface of the average juice output LQ and the current juice output Q, which is determined with a flow meter and computer. From this point in time, the pressing process should be ended and the next pressing cycle initiated. This begins with the withdrawal of the pressing member and is shown in Fig. 1 within the time interval T 1 .
• the loosening of the mash for example by rotating the press container, can already start during the withdrawal of the pressing member.
• the retraction of the pressing member is indicated in FIG. 1 by the characters T R and the loosening by T A.
• the duration of the individual press cycles depends on the process process, it is variable. The current juice output decreases with increasing pressing cycles.
• FIG. 2 shows the process sequence according to the invention with the start of the pressing cycle being delayed compared to the procedure of FIG. 1, i.e. the return stroke of the pressing member takes place after the maximum average juice output has been reached.
• This measure is based on the fact that the juice performance of the pressing cycles is reduced in the course of the pressing process.
• the average juice output at the next pressing cycle can be achieved by decommissioning or return stroke movement after the maximum value achieved, whereby this procedure must be based on the probability of empirical values occurring.
• the time delay Ky does not fall below the maximum average juice output value to be expected from the next pressing cycle.
• the pressing stroke of a pressing cycle can be ended when the instantaneous power Q corresponds to the expected maximum average juice output of the next pressing cycle.
• a press of the known type serves as a device for carrying out the method according to the invention, to whose juice outlet arrangement a flow meter is connected as a sensor of a processor, which controls the drive elements of the press in a manner adapted to the prevailing conditions.
• a collecting trough 3 or the like which can be connected to the outlet arrangement 2 of the press, is suitable, which is provided with a wall 4 designed as an overflow.
• a pressure measuring device 6 as a measuring sensor, which measures the level changes occurring during the individual pressing cycles and forwards them to a processor 7.
• a float, ultrasound or a pressure cell on the bottom of the drip pan could also be used to measure the level changes in the drip pan.
• the drive elements of the press 9 are controlled 8.
• the collecting trough 3 is emptied via a separate line 10, for which purpose a slide 11 which can be controlled by the processor or by hand is provided.
• the collecting trough 3 itself is designed with a bottom part 11 set back upwards, so that the juice can flow into the area of the measuring line 5.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
• Non-Alcoholic Beverages (AREA)
• Indole Compounds (AREA)
• General Preparation And Processing Of Foods (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=4196029

Family Applications (1)

Country Status (8)

Cited By (4)

Citations (2)

• 1987
  • 1987-03-05 CH CH823/87A patent/CH674632A5/de not_active IP Right Cessation
• 1988
  • 1988-02-29 AT AT88901780T patent/ATE68408T1/de not_active IP Right Cessation
  • 1988-02-29 WO PCT/CH1988/000049 patent/WO1988006518A1/de active IP Right Grant
  • 1988-02-29 EP EP88901780A patent/EP0304444B1/de not_active Expired - Lifetime
  • 1988-02-29 RU SU884356893A patent/RU2072784C1/ru not_active IP Right Cessation
  • 1988-02-29 DE DE8888901780T patent/DE3865588D1/de not_active Expired - Fee Related
  • 1988-03-04 PL PL27100788A patent/PL271007A1/xx unknown
  • 1988-03-05 CN CN88101203.3A patent/CN1018990B/zh not_active Expired

Patent Citations (2)

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