FR2516221A1 - HEAT PUMP - Google Patents

Abstract

THE HEAT PUMP INCLUDES A CHASSIS SUPPORTING AN EVAPORATOR AND A FAN, THE EVAPORATOR INCLUDING A COIL CARRIED BY A HEAT FLUID AND PROTECTED BY A CLADDING EQUIPPED WITH AIR INLET MEANS. THE AIR INTAKE MEANS INCLUDE A SERIES OF STRAIGHT BLADES 13 PROFILED AND JUXTAPOSED TO FORM SEVERAL VERTICAL PERSIANES, THE BLADES CONDUCTING BETWEEN THE AIRFLOW CHANNELS 16 SUBTRACTED TO CHANGES IN ORIENTATION OF WIND AND SOLAR RADIATION AND WHOSE TRACK AUTHORIZES A TANGENTIAL AND REGULAR INLET OF THE AIR TO THE COIL 14.

Description

Heat pump.

  The present invention relates to a pump

air-water or air-air type heat.

  Heat pumps of this type include

  as is known, a chassis carrying a general evaporator.

  Really with coil and a fan in operation

  ment, the evaporator is traversed by a heat transfer fluid

  tor to collect heat from an air flow

  that the fan forces to lick the coil This last

  deny is placed in the chassis and it is sheltered by a

  casing with air inlet orifices.

  When using such heat pumps, it is observed that climatic factors such as

  that the wind and the sun have fatal consequences

  expensive for the reliability and longevity of the pump.

  On the one hand, solar radiation can strike directly at certain times at various points.

  of the coil and can therefore cause diffi cult heating

  ferential or local overheating risking altering the operation of the compressor, in particular on start-up on the other hand, the force and orientation fluctuations of the wind determine variations in the air flow rate extracted by the fan and consequently an irregular load.

of the evaporator.

  The object of the invention is in particular to remedy these drawbacks by providing the evaporator with an air-water or air-air pump with air inlet means which, while remaining simple in design and convenient to use, are

  insensitive to the irregularity of climatic factors.

  The invention relates to an air-

  water or air-air which has a frame supporting an evacuation

  porator and fan, the evaporator comprising a

  coil traversed by a heat transfer fluid for sample

  ver calories on the ambient air displaced by the fan

  lator, the coil being protected by a covering provided

air intake means.

  According to the invention, the air intake means

  include a series of wide, straight blades,

  venably profiled and juxtaposed to form more

  rigid vertical louvers, creating flow channels between them that are protected from changes in the orientation of the wind and solar radiation and whose layout allows for tangential and regular entry

air towards the coil.

  In this way, the evaporator coil re-

  tangentially receives a constant air flow and is no longer subject to local overheating; In a particularly embodiment

  interesting, when the heat pump includes a 9-

  helical coil type evaporator with vertical axis

  cal connected to a cylindrical covering of the same axis, the

  blades are vertical and distributed over the entire periphery

  dress and provide the information in this way

  tangential and regular air production and protection

  integral tion sought, whatever the di-

  wind and solar radiation.

  At least one of the rigid louvers

  pant the blades may be susceptible to pivoting

  turn of hinges or vertical axes integral with the chassis

  of the evaporator in order to take either the closed position

  normal operation, i.e. an open position

  ture sparing a limited passage between two adjacent louvers It follows that even if the channels of each louver are obstructed by frost or snow,

  sufficient air flow can pass between the

hers towards the coil.

  In addition, when the heat pump is of ty-

  pe monobloc with cylindrical covering of vertical axis and

  therefore contains, in addition to the evaporator, the

  sor and its regulation block as well as the condenser,

16221

  there is provision for at least one of the shutters a

  full opening position for easy access-

  inside the casing to repair or replace

  place the control unit or the compressor.

  The profile of the blades can be in S so that the outer branch of the S of a blade partially covers the inner branch of the S of the adjacent blade, which improves the tangential effect sought

  for the introduction of air, while the branch in-

  t its air convexity to regulate it.

  The following description next to

  attached drawings will understand as an example-

  ple how the invention can be put into practice.

  Figure I shows, in diagrammatic elevation

  ticks a one-piece air-water heat pump according to the invention. Figure 2 is a sectional view of the figure

I along the horizontal plane II-II.

  Figures 3 and 4 are also sectional views in the same plane, showing the louvers

  vertical respectively in the open position

  fully open position.

  Figure 5 shows on a larger scale the

detail A of figure 2.

  In the embodiment illustrated in the figures, the evaporator according to the invention is integrated into

  a monobloc compression heat pump with the a-

  advantages which will be highlighted below but it could of course be constructed separately as an external element of an air-water heat pump or

  air-air including compressor, condenser and regulator

  lation would then be grouped inside the building.

  to be heated (so-called "split system" version).

  The heat pump 10 has a chassis with

  base It houses the condenser and a 12 cy-

  lindrique consisting of a set of vertical blades

  13 distributed regularly over the periphery of an eva-

  porator 14 formed by a helical coil whose general vertical axis is substantially the same as that of the covering. A heat transfer liquid circulated in the coil is brought to a boil by drawing heat from the air which a fan 15 forces to pass through the channels 16 between the blades 13 and to lick the coil before expelling it by a opening not shown.

  The straight and vertical blades 13 protect

  gent the coil 14 of wind and solar radiation

  in all directions and they also allow an introduction

  tangential air flow towards the coil 14 (arrow in FIG. 5) The blades 13 are grouped in three

  curved shutters 13 a, 13 b, 13 e enveloping narrow-

  the coil and pivotally mounted on hinges or vertical axes 17 a, 17 b, 17 c The blades of each

  blinds are fixed at their ends to an in-

  lower and to a respective upper arch mounted pi-

  voters on the corresponding vertical axis

  They can occupy a closed operating position.

  normal (Figure 2), a semi-open position (Figure 3) and, for at least one of them, a

  fully open position (Figure 4).

  In the position of FIG. 3, the shutter leaves an opening 18 open between itself and the adjacent shutter to provide air passage even in the event of obstruction of the channels 16 by frost or

the snow.

  In the position of figure 4, the shutter

  13 a allows intervention through opening 19 on the com-

  part 20 containing the compressor 21, the block of

  regulation 22, for example disassembly and re-

  line of these components according to arrow F. Figure 5 shows the shape and arrangement

  profiled blades 13 for protecting one of the blinds

  nes 13 b The profile of the blades 13 is substantially in shape

  flattened me such as the outer branch 23 of cha-

  that S covers the inner branch 24 of the S of the adjacent blade; the air flow takes place in the channels 16 formed between the branch 23 of a blade and the branch 24 of the adjacent blade according to arrow 25

  and we see that the air flow reaches tangential-

  slowly and regularly with the helical coil 14 after sliding on the convexity 26 of the branch 24, whatever the force and direction of the wind In addition, the heat due to solar radiation is absorbed by

  the blades 13 and it is returned indirectly to the service

  pentin 14 The width of each blade is approximately 10 cm.

  In a variant not shown, each la-

  me 13 can be pivotally mounted on vertical hinges

  while the rotation around the general axis of ha-

  billing 12 of a crown connected to the blades allows

define the orientation of the blades.

Claims (1)

CLAIMS 1 Air-to-water or air-to-air heat pump having a frame supporting an evaporator and a fan, the evaporator comprising a coil traversed by a heat-transfer fluid to take up the calories from the ambient air displaced by the fan, the coil being protected by a covering provided with air intake means, characterized in that the air intake means comprise a series of large straight blades (13) profiled and juxtaposed to form several vertical louvers, the blades providing between them air flow channels (16) removed from the changes in orientation of the wind and of the solar radiation and whose layout allows a tangential and regular entry of air towards the coil (14). 2 Heat pump according to claim 1, chartered by the fact that at least one of the louvers is rigid (13a, 13b, 13c) and capable of pivoting around hinges or vertical axes (17 a, 17 b, 17 c) supporting the chassis (11) of the evaporator in order to take either the closed position for normal operation (figure 2), or a limited open position (figure 3) to allow sufficient air flow between two adjacent shutters in the event of channel obstruction (16). 3 Heat pump according to claim 2, of the monobloc type with cylindrical covering of vertical axis, characterized in that the pivoting louver (13 a, 13 b, 13 c) can come to occupy a position of full opening (figure 4). 4 Heat pump according to one of claims   1 to 3, including a coil type evaporator   helical with vertical axis connected to a cylindrical covering   drique of the same axis, characterized in that the blades (13) are vertical and evenly distributed   over the entire periphery of the evaporator (14).   Heat pump according to one of claims   I to 4, characterized in that the profile of the blades (13) is in S, such that the outer branch (23) of the S of a blade partially covers the inner branch (24)   of the S of the adjacent blade, while the internal branch   rieure offers its convexity (26) to the air flow (25).