US2340034A - Refrigerating system - Google Patents

Refrigerating system Download PDF

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Publication number
US2340034A
US2340034A US345225A US34522540A US2340034A US 2340034 A US2340034 A US 2340034A US 345225 A US345225 A US 345225A US 34522540 A US34522540 A US 34522540A US 2340034 A US2340034 A US 2340034A
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US
United States
Prior art keywords
piston
motor
stroke
compression
evaporator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US345225A
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English (en)
Inventor
Zehnder Otto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zehnder Group AG
Original Assignee
Gebrueder Zehnder AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gebrueder Zehnder AG filed Critical Gebrueder Zehnder AG
Application granted granted Critical
Publication of US2340034A publication Critical patent/US2340034A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/025—Motor control arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F25B1/02—Compression machines, plants or systems with non-reversible cycle with compressor of reciprocating-piston type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2117—Temperatures of an evaporator

Definitions

  • This invention relates to compression refrigbetween a conveying device and the driving moerting systems comprising piston operated comtor; pressors, the suction stroke of the compressor
  • Fig. is a schematic view of an example of a being effected by the pressure of the refrigerant refrigerating system according to the invention vapor passing into the compressor and the comincluding a flooded evaporator, and
  • pression stroke of the compressor being efiected E18- 6 is a View O a modified detaiL by a source of electric power. which is auto- In the first example of efri erating system. matically connected.
  • the condenser in which the compressed ammonia the suction strok vapors are condensed by withdrawing heat thereof the compressor piston is effected by refrigerm, is designated y l in i
  • a lower nant vapor passing into the compressor wh n th duit 2 leads from the condenser I to a nozzle pressure of the refrigerant vapor present in the throttling arrransemen 3 in 111 the m of a suction conduit surpasses a certain value, in conp t r re ulatin evice
  • the piston of the F 4 are connected through conduits compressor then being actuated for performing sneetively with the upper space of a
  • 3o liner 9 which ismade of hygroscopic material, for g: fg gz 3: Ega 5 g g gg 3:: example felt, and serve for lubricating the cy1menergy inherent in the refrigerant vapor can be Above the rim 3 as an on Winthe electric motor. Moreover provision can be fr.examp1e a special rubber material and within d.
  • the piston i cooperates with two parduring the time elapsing between compression arrange strokes that is in the course of each succeeding anally disposed conveyer chains 10 each of whmh suction stroke which occur under the influence passes over two chain wheels the latter of the refrigerant returning to the compressor the axle 13 to which a gear wheel 53 is fixed which from the eveperemr' intermeshes with a pinion 54 which is in turn se- Exemplee of the comPreseien refrigerating cured on the rotor shaft 55 of an electric driving system aecordmi the Invention are 111mm motor I.
  • the two conveyer chains 10 are in- Y y exemplifi d in the accompanying drawing 5 tel-connected by a transverse driving pin 14 carin which rying a roller II,
  • Fig 1 shows an elevation partly in sect
  • the piston 7' is asthe compressor and associated accessories of a sumed to be moved'downwardly under the mfirst example of a refrigerating system a f fluence of the pressure of the refrigerant vapor ingto the invention including an injection evapopassing ⁇ mm t evaporator 4 through conduit rator; 4 into the cylinder 8, so that the piston rod i8 Fig. 2'shows a side elevation of Fig. 1; rests against the driving pin 14 through a, r FIE. 3 is a sectional view of a detail of Fig.
  • FIG. 4 is a view of a modification-of the drive 35 sponding direction and turning the pair of wheels 4 wheels being united into a double chain wheel to v the piston 1 which 53, 54 accordingly.
  • the conveyer chains have the tendency to drive the electric motor 44 at a higher than synchronous speed, so that a wattmeter (not shown) connected in circuit is stopped, and does not register any current consumed, although the eletcric motor 46 is not disconnected from the network 46, 4'1.
  • an expansible tube 62 connected with the evaporator via a conduit 53 and having an arm 16 for controlling a mercury tumbler switch 40 is extended.
  • the tumbler switch 10 which is included in the energizing circuit of the electric driving motor M by a wire loop 80 and pivoted at 11 engages by means of its carrier arm into a notch provided in the control arm 16 (Fig. 2).
  • the bell crank lever 18 engages in a slot which is formed in the control bolt 80 so as to allow the bell crank lever 18 to perform a rocking movement in the direction opposite to the movement described above without influencing the control bolt 80, so that this bolt remains in position without being disturbed in the course of the suction stroke of the piston 'I.
  • the control bolt 80 is however axially displaced in the guide in which it is arranged and is thus retracted from the path of rocking movement of the tumbler switch 40.
  • the electric motor 64 is, therefore, adapted to start unloaded each time after the performance of a compression stroke the suction stroke for the reason that du:ing the suction stroke of the piston l the pair of chains 10 is driven from the piston I and during the compression stroke of the piston I from the electric motor 46.
  • this tumbler switch is prevented from changing over at an improper time, so that disconnecting of the system is impossible, when the driving pin It hits the crosspiece IS on the piston rod IS in the course of the upward movement of this pin, in' order to adapt the piston I subsequently to perform its suction stroke.
  • a unidirectional coupling 91 is arranged to vwhich end the wheel 54 is provided with interior ratchet teeth.
  • the coupling 91 may consist of compression stroke
  • the detrimental friction influences from the cylinder wall which at low suction speeds of the piston affect the degree of efflciency to a great extent, can be considerably reduced, especially if the cylinder is in hot condition, due to the reduction in time obtained for the filling of the cylinder.
  • the wattmeter conthe motor records the energy losses of the motor while running at noload. Due to the detrimental influence of the cylinder wall being decreased, the increase of degreeof efficiency is considerably greater than the no-load losses during a very short time period the length of which corresponds to that of the duration of the suction stroke of the piston.
  • the expansion tube 82 cooperates with the mercury tumbler switch through a conducting wire 82 with a winding 83 which surrounds a core member 84 which is further surrounded by a winding 85.
  • a conducting wire 88 leads from the her 90.
  • a unidirectional coupling is arranged which is ineflective during said suction stroke of said piston.
  • Refrigerating machine according to claim 1 and in which the endless rotating power transmitting device is provided with a plurality of driving pins for cooperation with said piston, so

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
US345225A 1939-07-12 1940-07-12 Refrigerating system Expired - Lifetime US2340034A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH2340034X 1939-07-12
CH543647X 1939-07-12
CH228520T 1939-07-12
CH725972X 1939-07-12

Publications (1)

Publication Number Publication Date
US2340034A true US2340034A (en) 1944-01-25

Family

ID=33458841

Family Applications (1)

Application Number Title Priority Date Filing Date
US345225A Expired - Lifetime US2340034A (en) 1939-07-12 1940-07-12 Refrigerating system

Country Status (5)

Country Link
US (1) US2340034A (fr)
CH (1) CH228520A (fr)
DE (1) DE725972C (fr)
FR (1) FR51218E (fr)
GB (1) GB543647A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2583285A (en) * 1945-04-03 1952-01-22 Zehnder Radiatoren & Appbau Ge Hydraulic piston-control rigging for refrigerator-compressors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2583285A (en) * 1945-04-03 1952-01-22 Zehnder Radiatoren & Appbau Ge Hydraulic piston-control rigging for refrigerator-compressors

Also Published As

Publication number Publication date
DE725972C (de) 1942-10-03
CH228520A (de) 1943-08-31
FR51218E (fr) 1941-12-20
GB543647A (en) 1942-03-06

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