EP2531784A1 - Appareil frigorifique et machine frigorifique destinée à ce dernier - Google Patents

Appareil frigorifique et machine frigorifique destinée à ce dernier

Info

Publication number
EP2531784A1
EP2531784A1 EP11701787A EP11701787A EP2531784A1 EP 2531784 A1 EP2531784 A1 EP 2531784A1 EP 11701787 A EP11701787 A EP 11701787A EP 11701787 A EP11701787 A EP 11701787A EP 2531784 A1 EP2531784 A1 EP 2531784A1
Authority
EP
European Patent Office
Prior art keywords
current
controlled switch
controlled
switch
temperature
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.)
Withdrawn
Application number
EP11701787A
Other languages
German (de)
English (en)
Inventor
Peter Nalbach
Volker Braun
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2531784A1 publication Critical patent/EP2531784A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • F25D11/022—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures with two or more evaporators
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2511—Evaporator distribution valves
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/12—Sensors measuring the inside temperature
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/12—Sensors measuring the inside temperature
    • F25D2700/122—Sensors measuring the inside temperature of freezer compartments

Definitions

  • chillers for such combination refrigerators known.
  • a compressor, a freezer compartment evaporator and a standard refrigeration compartment evaporator are connected in series in a single refrigerant circuit.
  • This type of chiller works with a very simple control, in which, as with conventional refrigerators with a single compartment by a
  • Standard refrigerated compartment evaporator supplied.
  • an electronic circuit is used, which continuously, even if the switching valve is not switched, generates a power loss that affects the overall efficiency of the device.
  • the abandonment of such a circuit could both the
  • the first current-controlled switch is connected in series with a diode in order in each case to pass only a half-wave of an applied alternating voltage and to apply the switching valve with a unipolar voltage whose sign defines the switching direction of the switching valve.
  • a series circuit of a second current-controlled switch and a second diode is connected in parallel to the series connection of the first current-controlled switch and the first diode, wherein the second diode is polarized antiparallel to the first.
  • each of the output terminals is connected to one of the series circuits of a current-controlled switch and a diode.
  • auxiliary winding As drive units of refrigerators electric motors are common, which comprise a main winding and an auxiliary winding, wherein the auxiliary winding is to be acted upon in a start-up phase of the motor with power to specify a running direction of the motor, or to ensure a start of the motor, even if this is in an equilibrium position with respect to the electromagnetic forces generated by the main winding.
  • the auxiliary winding In order to apply power to the auxiliary winding only in the starting phase of the motor, it may also be associated with a current-controlled switch.
  • the current-controlled switch via which the auxiliary winding can be supplied with current, is identical to the first current-controlled switch.
  • the current-controlled switch supplying the auxiliary winding may also be a third different from the aforementioned switches
  • current-controlled switch and the auxiliary winding is connected in parallel to the switching valve.
  • current-controlled switches can be used, each with an ideal adaptation to the properties, in particular power and switching times, of the auxiliary winding or of the switching valve.
  • the amount of current required to switch the switching valve is generally low, and many types of current-controlled switches do not switch at currents greater than the switching current of the switching valve. In order to use such types of current-controlled switches, it is appropriate to a
  • the current-controlled switches can be real PTC thermistors whose conductivity is temperature-dependent and which are heated by a current flowing through them, so that the conductivity also depends indirectly on the current; however, it is also possible to use electronic components, for example based on triacs, which simulate the current-dependence of the conductivity of such a PTC thermistor, without necessarily having the temperature-conductivity characteristic of the PTC thermistor.
  • both the first controlled by a temperature sensor switch on a colder and the second controlled by a temperature sensor switch can be arranged on a warmer of two compartments of the refrigerator, as well as vice versa.
  • one will generally attach the second temperature-controlled switch to the compartment which has more frequent cooling requirements so that, when cooling demand occurs, the compressor's start-up will not be unnecessarily delayed. It is also expedient if at least a part of the evaporator of the compartment to which the second switch controlled by a temperature sensor is mounted, and the evaporator of the compartment to which the first switch controlled by a temperature sensor is mounted, are flowed through in series of refrigerants.
  • Fig. 1 is a schematic representation of the refrigerator of a
  • Fig. 2 is a block diagram of the electrical components of
  • Refrigerating machine according to a first embodiment
  • FIG. 3 is a block diagram of the electrical components according to a second embodiment.
  • FIG. 4 is a block diagram of the electrical components according to a third embodiment of the invention.
  • Fig. 1 shows schematically a refrigerator of a household refrigerating appliance with a freezer compartment 1 and a normal refrigeration compartment 2.
  • the subjects 1, 2 are associated with evaporator 3 and 4 respectively.
  • Injection points 5, 6 of the evaporator 3, 4 are connected to one output of a bistable solenoid valve 7.
  • Evaporator 3 may be provided, in which the refrigerant from the evaporator 4 opens shortly after the injection point 5.
  • Injection point 5 or the injection point 6 is supplied.
  • a controlled by a temperature sensor 22 switch 10 or 1 1 is mounted (see Fig. 2).
  • a temperature sensor 22 and at the same time as a movable element of the switch 10, 1 1 can serve a bimetallic element; but it can also be sensor 22 and switch 10, 1 1 spatially separated by about an electronic sensor is mounted as a temperature sensor 22 to a tray 1 or 2 and as a switch 10, 1 1 driven by a measuring signal of the sensor
  • Normal cooling compartment 2 is arranged, but a reverse placement would also be possible.
  • a source of AC supply voltage 12 a main winding of a motor of the compressor 8 with 13, an auxiliary winding with 14, two diodes 15 and 16 and PTC resistors with 17, 18 and 19 respectively.
  • the switch 10 closes, and the supply voltage from the source 12 is applied to the main winding 13 and the series connection of the auxiliary winding 14 with the PTC 17 at.
  • the PTC 17 is initially conductive, so that a current pulse through the
  • Auxiliary winding 14 flows, which can start the engine of the compressor 8 reliably.
  • Switch 1 1 depends. If the temperature of the normal cooling compartment 2, which is exposed to the switch 1 1, is above a threshold set at the switch 1 1, there is
  • the resistance value of the PTCs is typically about 50 ⁇ in the transient state and about 100 k ⁇ in the off state.
  • Evaporator 3 is supplied with refrigerant alone. Again, a short time of current flow is sufficient to put the PTC 19 in the blocking state and to bring the current flow through the solenoid valve 7 substantially to a standstill.
  • the solenoid valve 7 in the energized state typically has a power of about 10 W, corresponding to a current consumption of almost 50 mA, when the voltage of the voltage source 12 is 220 V. Such current is low compared to the switching currents of most PTCs available on the market.
  • a load resistor 20 as shown in dashed lines in Fig. 2, be connected in parallel to the solenoid valve 7. The influence of the power loss of the resistor 20 on the efficiency of the entire refrigerator is negligible, since the resistor 20 is energized only as long as the PTCs 18, 19 need to switch, typically 100 to 200 ms long.
  • FIG. 3 shows a modified block diagram in which the number of PTCs is reduced by one compared to FIG. Same components are in Fig. 3 with the same Reference numbers as shown in Fig. 2 and will not be described again. The essential difference between the two embodiments is that in Fig. 3 the
  • Auxiliary winding 14 is offset to the occupied in Fig. 2 by the load resistor 20 space.
  • the current consumption of the parallel circuit of solenoid valve 7 and auxiliary winding 14 is sufficient to ensure a safe switching of the PTCs 18, 19, even if they are used for these common types with a tripping current of 100 mA or above.
  • a disadvantage of this variant is in comparison to FIG. 2 enlarged power loss, as induced by the operation of the compressor 8 in the auxiliary winding 14 voltages can drive a current flow through the solenoid valve 7 even when the solenoid valve 7 through the switch 1 1 and the PTCs 18, 19 is disconnected from the voltage source 12.
  • a load resistor 21 is provided parallel to the solenoid valve 7.
  • this load resistor 21 as in the case of the resistor 20, it may be a simple ohmic resistance, but the use of a PTC is also conceivable. The latter is particularly useful to prevent switching of the switch 1 1, that when the compressor 8 is running, a switch-on pulse is applied to the auxiliary winding 14, which could interfere with the running of the compressor motor.
  • a PTC 21 should be slower than the PTCs 18, 19 to ensure that current flow through the auxiliary winding 14 does not prematurely begin when the compressor motor starts up

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

L'invention concerne une machine frigorifique destinée à un appareil frigorifique combiné, tel qu'un réfrigérateur-congélateur ménager, comprenant un condensateur (8) et au moins deux évaporateurs (3, 4) montés en parallèle, raccordés à une soupape de commande (7) multistable à commande électrique, et pouvant être alimentés de manière sélective en fluide frigorigène par l'intermédiaire de la soupape de commande (7). Un montage en série, composé d'un premier commutateur (18; 19) commandé par courant présentant une caractéristique de thermistance CTP et de la soupape de commande (7), est monté électriquement en parallèle au condenseur (8).
EP11701787A 2010-02-01 2011-01-21 Appareil frigorifique et machine frigorifique destinée à ce dernier Withdrawn EP2531784A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010001458A DE102010001458A1 (de) 2010-02-01 2010-02-01 Kältegerät und Kältemaschine dafür
PCT/EP2011/050810 WO2011092116A1 (fr) 2010-02-01 2011-01-21 Appareil frigorifique et machine frigorifique destinée à ce dernier

Publications (1)

Publication Number Publication Date
EP2531784A1 true EP2531784A1 (fr) 2012-12-12

Family

ID=43734056

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11701787A Withdrawn EP2531784A1 (fr) 2010-02-01 2011-01-21 Appareil frigorifique et machine frigorifique destinée à ce dernier

Country Status (5)

Country Link
EP (1) EP2531784A1 (fr)
CN (1) CN102741625A (fr)
DE (1) DE102010001458A1 (fr)
RU (1) RU2012134985A (fr)
WO (1) WO2011092116A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109883104A (zh) * 2018-12-27 2019-06-14 青岛海尔特种制冷电器有限公司 冰箱及其控制方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5762380A (en) * 1980-10-03 1982-04-15 Tokyo Shibaura Electric Co Quick cooler for refrigerator
JPS6029576A (ja) * 1983-07-25 1985-02-14 株式会社東芝 冷蔵庫
ES2125027T3 (es) * 1994-08-23 1999-02-16 Bosch Siemens Hausgeraete Circuito para excitar por lo menos un iman electricamente accionable.
DE4429919A1 (de) * 1994-08-23 1996-02-29 Bosch Siemens Hausgeraete Schaltungsanordnung zum Betrieb eines elektrisch ansteuerbaren Magnetventils
DE19535144A1 (de) * 1995-09-21 1997-03-27 Bosch Siemens Hausgeraete Kältegerät
CN2864520Y (zh) * 2006-01-19 2007-01-31 河北中兴田野客车有限公司 冷藏运输车的冷藏机组与驾驶室空调系统

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011092116A1 *

Also Published As

Publication number Publication date
RU2012134985A (ru) 2014-03-10
WO2011092116A1 (fr) 2011-08-04
DE102010001458A1 (de) 2011-08-04
CN102741625A (zh) 2012-10-17

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