FR2567254A1 - REFRIGERANT AGENT EVAPORATOR FOR A REFRIGERATION SYSTEM - Google Patents

Abstract

REFRIGERANT EVAPORATOR FOR A REFRIGERATION SYSTEM. IT INCLUDES A 1 HORIZONTAL CALENDER HAVING 2 THROUGH TUBES AND SUBDIVIDED INTO TWO PARTS BY MEANS OF A 10 VERTICAL BULKHEAD GOING UP TO A CERTAIN HEIGHT. HEAT PUMP.

Description

? 67254

  Refrigerant evaporator for a refrigeration system.

  The present invention relates to an evapo-

  a refrigeration system in the form of a heat exchanger consisting of a horizontal calender having through tubes. The heat exchanger is of the type in which a liquid heat transfer medium flows into the tubes while the coolant is evaporated outside the

  tubes. This type is normally the most practical,

  that the heat transfer medium often gives fouling and deposits and it's much more

  simple to clean the inside as the outside of the tu-

  bes. Up to now evaporators of this type have been constructed either in the form of flow evaporators, in

  evaporation takes place by sending the agent

  liquid refrigerant in the bottom of the evaporator and by boiling it up to the surface of the liquid, either in the form of dry evaporators, in which the coolant passes into the shell in the longitudinal direction and evaporates during

  the passage in the grille. The first type of evapo-

  to the disadvantage that oil from the compres-

  If it is driven, it is precipitated at the bottom of the calandria, which is more or less filled with oil. The other type of evaporator has the disadvantage of giving a poor heat transfer of the gas-liquid mixture to the heat transfer agent in the tubes and that is why this type has large dimensions so

  to provide the desired heat transfer.

  The present invention is based on a combination of

  one of the two principles mentioned above in sub-

  aiming the inside of the shell in two parts by means of a vertical dividing wall. This partition extends from the bottom of the calender to more than

  half the height of the grille, the agent

  liquid refrigerant being introduced at one end

  of the calandria and the gaseous medium coming out

  at the end of the grille. The first part of

  the calender thus functions as a flow evaporator.

  while the second part works in evapo-

  dry. The vertical partition serves as weir

  between the two parties, so that a certain amount

  liquid refrigerant is constantly flowing

  by overflow in the dry part of the shell.

  The boiling then gives an oily mixed medium which is constantly displaced along the dry portion, so that the oil is prevented from accumulating in

  a big measure in the grille. Sooner or later, the oil

  return it with the gaseous refrigerant to the

  pressure to lubricate it.

  In the attached drawing, given solely as e-

  xemple, the single figure is a sectional view of an evaporator according to the invention. The evaporator can be used for both refrigeration systems

  properly so called for heat pumps.

  The evaporator consists of a shell 1 horizontal

  zontal having longitudinal tubes 2 which are dually

  gelled in tubular plates 3 at the ends of the shell. Collector chambers 4 and 5 are attached to these tube plates by means of flanges and bolts. A, heat transfer medium penetrates

  in room 5 through a lower entry 6

  upper, passes into the lower bundle of tubes 2 and into the return chamber 4, then into the upper bundle of tubes to go to the upper part of the chamber 5 which is subdivided by a vertical partition in the middle, and out the exit 7. In

  refrigeration systems, the transport medium

  heat is for example brine.

  But in heat pumps, the transfer medium

  heat consists of the middle and the groundwater

  tick or in water from a water course or

  waste water from which heat must be recovered.

  The liquid refrigerant enters through the inlet

  8 at the bottom of the grille while the refrigerant

  gaseous vapor evaporates by exit 9 at the top of

the grille.

  According to the invention, a vertical partition 10 is now placed somewhere to the right of the

  center of the grille, so as to subdivide the

  ci in a flow part on the left and in one

  dry part on the right side The partition 10 rises

  Forty-third of the height of the calandria and serves as weir for the left part so that part of the liquid boiling poured on the dry part. This causes the oil in suspension or dissolved in the liquid to be driven also forward towards the dry part, so that the quantity of oil in the flow part can never exceed the allowed value. . To make the transfer of heat in the dry part between the refrigerant and the medium

  of heat transfer in the tubes, more efficient

  cace, thus ensuring the complete evaporation of the

  refrigerant while being sure that the precise oil

  in this part constantly returns to the

  presser following the gaseous medium, walls 11 forming baffles have been arranged in the dry part so that the gas stream is deflected

  and in order to maintain a high throughput in the

  dry. These walls start alternately from the bottom

and from the top of the grille.

  As mentioned above, the partition is

  a little to the right of the center of the radiator grille

  in such a way that the flow part which has the best

  their heat transfer is the largest. The

  The dry part then acts as a superheater and must be dimensioned so as to ensure complete evaporation of the coolant, before it exits in the gaseous state through the outlet 9 at the top of the shell.

Claims (4)

  1 - Evaporator for a refrigeration system   in the form of a heat exchanger consisting of   both in a horizontal calender (1) having tubes (2) transverse for the passage of a heat transfer medium, the calandria being subdivided into two parts up to a certain height by means of a partition ( 10) vertical, a liquid refrigerant entering through one of the ends (8) of the calender evaporating in the space between the   tubes and the shell of the calandria and the refrigerant   evaporated material being discharged through the other end (9) of the shell; characterized in that the vertical partition (10) serves as a weir for the coolant   liquid in the first part of the grille.   2 - Evaporator according to claim 1,   characterized in that the height of the vertical partition   hold (10) slightly exceeds half the height of the grille (1).   3 - Evaporator according to claim 1, 256 7-54   characterized in that the second part of the shell   (1) is subdivided by means of other partitions (11)   Ticals extending upward and downward into the shell into communicating chambers to deflect the evaporated coolant stream.   4 - Evaporator according to claim 1,   characterized in that the first partition (10) is   in such a way that the first part of the   landre, namely the part   holds the liquid coolant is larger than the second part.