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WO2012110295A2 - Appareil frigorifique ménager comportant une vanne d'expansion - Google Patents

Appareil frigorifique ménager comportant une vanne d'expansion Download PDF

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Publication number
WO2012110295A2
WO2012110295A2 PCT/EP2012/051286 EP2012051286W WO2012110295A2 WO 2012110295 A2 WO2012110295 A2 WO 2012110295A2 EP 2012051286 W EP2012051286 W EP 2012051286W WO 2012110295 A2 WO2012110295 A2 WO 2012110295A2
Authority
WO
WIPO (PCT)
Prior art keywords
expansion valve
refrigerating appliance
flow
appliance according
domestic refrigerating
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.)
Ceased
Application number
PCT/EP2012/051286
Other languages
German (de)
English (en)
Other versions
WO2012110295A3 (fr
Inventor
Stefan BASSMANN
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 WO2012110295A2 publication Critical patent/WO2012110295A2/fr
Publication of WO2012110295A3 publication Critical patent/WO2012110295A3/fr
Anticipated expiration legal-status Critical
Ceased 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • 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
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • F25B41/35—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by rotary motors, e.g. by stepping motors
    • 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
    • F25B2600/2513—Expansion valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the invention relates to a household refrigerating appliance, comprising a heat-insulating inner container with a coolable interior, and a refrigerant circuit system connected to cool the interior by means of refrigerant pipelines comprising a compressor, a condenser, an evaporator and an expansion valve arranged between condenser and evaporator.
  • a refrigerator with a refrigeration cycle system which comprises a compressor with variable drive speed, a condenser, a condenser fan, an evaporator and a evaporator fan with variable drive speed.
  • the refrigeration device further comprises a plurality of temperature sensors which are connected to an electronic control, which adjusts, in particular, the drive speed of the compressor and evaporator fan on the basis of the values of the temperature sensors.
  • the object of the invention is to provide a household refrigeration appliance, in which a refrigerant circuit system of the household refrigerating appliance can be operated in a simple manner under different operating conditions energy-efficient.
  • a household refrigerating appliance comprising a heat-insulating inner container with a coolable interior space, and a refrigerant circuit system connected to cool the interior by means of refrigerant pipes, comprising a compressor, a condenser, an evaporator and an expansion valve arranged between condenser and evaporator, the
  • Expansion valve has an electric motor driven adjustment device for changing a flow rate of the expansion valve defining flow cross-section.
  • the refrigerant cycle system may be configured to supply a compressor-compressed refrigerant to a condenser, in which the refrigerant is at least partially transferred from a gaseous to a liquid state and heat is removed. Downstream of the condenser, the refrigerant can the Expansion valve to be forwarded.
  • An output terminal of the expansion valve is then connected to an input of the evaporator, in which the cooled down refrigerant is again relaxed, in particular at least liquefied portion of the refrigerant passes back into the gas phase and thereby absorbs heat.
  • An outlet of the evaporator is in turn connected to the compressor, whereby the cycle of the refrigerant cycle system is closed.
  • the expansion valve having an electric motor driven adjusting device for changing a flow rate of the expansion valve defining flow cross-section, then the flow rate of the expansion valve changes, in particular be changed during operation of the household refrigerator.
  • a throttle capillary In refrigerators and freezers, a throttle capillary is generally used for the necessary pressure reduction in the refrigeration cycle. This is generally located between the high pressure side of the condenser and the low pressure side of the evaporator.
  • an expansion valve with an adjusting device driven by an electric motor is used to change a flow cross-section determining the flow rate of the expansion valve, which can ensure a desired distribution of the refrigerant in the refrigerant circuit system.
  • An optimized distribution by changing the flow rate of the refrigerant through the expansion valve provides for better utilization of the evaporator and thus for optimized performance of the domestic refrigerator.
  • an adjustment of the power of the household refrigerating appliance during operation can be carried out continuously by the expansion valve with an adjusting device driven by an electric motor for changing a flow cross-section determining the flow rate of the expansion valve.
  • the adjusting device can be designed to gradually change the flow cross-section.
  • Expansion valve may be predetermined a plurality of uniquely predetermined flow cross-sections. This may make it possible to operate the expansion valve with a simple control and / or regulating device. Each step position of the adjusting device can be assigned a different flow cross-section of the expansion valve.
  • the adjustment device may be driven by an electric stepper motor.
  • the adjusting device for stepwise changing the flow cross section may comprise a stepwise adjustable mechanical actuator.
  • the adjusting device can also be designed mechanically such that an actuator is mounted continuously adjustable and a stepwise adjustment of the actuator is realized by an electric stepper motor, which adjusts the mechanically mounted actuator in steps or drives. In that regard, a mechanical step size or the mechanical step sizes of the actuator is predetermined by the electric stepper motor.
  • the electric stepping motor may be connected to a control device that is configured to control and / or regulate the flow rate of the expansion valve by changing the flow cross section by means of adjusting the adjusting device.
  • a different flow rate within the refrigerant cycle system can be generally adjusted by the control device driving the stepper motor and moving the actuator by the stepper motor so that the flow area of the expansion valve is changed from one cross-sectional size to another cross-sectional size.
  • the flow cross-section of the expansion valve can be determined for example by a flow-through opening in a wall in the expansion valve, whose opening cross-section is variable or adjustable.
  • the opening cross-section of the flow-through opening can be changed or adjusted, for example, by moving a movably mounted panel in front of the flow-through opening and covering the flow opening at least partially, in particular more or less.
  • the maximum opening cross section of the throughflow opening can be partially covered by a section of the panel at least partially overlapping the throughflow opening.
  • the control device of the household refrigerating appliance can be set up, the electric motor-driven adjusting device, in particular the electric stepper motor depending on, for example, an outside temperature of the environment, an internal temperature in the refrigerator, climatic conditions in the environment in which the refrigeration appliance is intended to be operated, and / or user-specific needs control, in particular, to operate the refrigerant cycle system optionally with a first or a second flow rate.
  • the electric motor-driven adjusting device in particular the electric stepper motor depending on, for example, an outside temperature of the environment, an internal temperature in the refrigerator, climatic conditions in the environment in which the refrigeration appliance is intended to be operated, and / or user-specific needs control, in particular, to operate the refrigerant cycle system optionally with a first or a second flow rate.
  • limits for the temperatures at the installation site can be taken into account.
  • domestic refrigerators can therefore be divided into the following climate classes:
  • the service limit indicator is generally indicated on the nameplate of the household refrigerator.
  • the refrigeration units used, for example, in Germany usually correspond to the classes N or SN.
  • the standstill time or the running time of the compressor will be extended.
  • the standing and running times have a direct effect on the temperatures in your fridge and freezer.
  • the desired temperature in the freezer compartment of at least -18 ° C is no longer guaranteed because the downtime of the compressor is longer at lower ambient temperatures and thus no cold for the refrigerator and freezer is produced.
  • the expansion valve may have a wall which is provided with a flow-through opening which is at least partially covered for setting different flow cross-sections of the expansion valve with an adjustable diaphragm which covers differently sized surface sections of the flow-through opening in different positions of the diaphragm.
  • the expansion valve may include a housing having a refrigerant inlet and a refrigerant outlet, in which the wall having the flow-through opening is formed by a bottom of the housing.
  • the flow-through opening can be formed by a branch of the refrigerant outlet or alternatively of the refrigerant inlet or directly adjoin it.
  • the flow-through opening can be formed for example by a bore or recess in the bottom of the housing of the expansion valve.
  • the flow-through can be covered with an adjustable aperture. Depending on the size of the desired opening cross-section in the respective position of the diaphragm, the shutter is completely, more or less partially or not moved over the flow-through by the actuator of the electric motor driven adjusting device.
  • the diaphragm can be rotatably mounted about an axis lying eccentrically to the center of the particular circular flow opening.
  • the panel can be at least partially or even completely swung onto the particular circular flow opening.
  • the panel may have at least one, in particular two pins or an axle pin, which is rotatably and / or pivotably mounted in bearings of the expansion valve, in particular in the housing of the expansion valve.
  • the diaphragm can for example be formed by a circular disk, in which at least one pin, in particular two pins or an axle pin is arranged eccentrically to the center or to the center of the circular disk, so that upon rotation of the circular disk about the pin or the axle pin depending on the angular position the circular disc does not cover the flow opening, at least partially covered or even completely covered.
  • the diaphragm can be formed by a disk which has a contour which has at least one spiral contour section.
  • the flow opening in dependence of the angular position of the disc, the flow opening not covered, at least partially covered or even completely covered.
  • a non-overlapping coverage, an at least partial overlap or even complete coverage is determined by the spiral contour section.
  • the spiral contour section can be helical.
  • the visor may be coupled via a transmission to a drive shaft which is connected to the electric stepper motor.
  • a gear ratio can be realized, so that the diaphragm can have a different angular velocity than the angular velocity of the drive shaft or of the electric stepping motor coupled thereto.
  • the transmission may be formed as a spur gear having a first spur gear connected to the drive shaft, which meshes with a second spur gear connected to the diaphragm.
  • a drive spur gear may be integrally formed with the drive shaft. Such a drive spur gear may directly mesh with an output spur gear connected to the bezel.
  • the second spur gear may be integrally formed with the diaphragm.
  • a conventionally designed spur gear may for this purpose have a circular side wall, on which a shoulder projects axially, which has a radial outer contour, which carries the helical or helical contour section.
  • the through-flow opening is so far covered by a side wall of the spur gear as a diaphragm.
  • the invention thus makes it possible depending on the embodiment to control the refrigerant flow, for example via a stepper motor controlled expansion valve.
  • refrigerant can be introduced into a tight rotary valve via a pipe.
  • the rotary valve also has an outlet on the side of an inlet. Above this outlet is a wheel.
  • This thumbwheel has teeth on its lateral surface and can thus be controlled by a gear.
  • the driving gear can be operated by an electric stepper motor.
  • a spiral-shaped formation is located, which releases depending on the position of the adjusting wheel a different size surface of the outlet.
  • both the filling of the evaporator can be controlled or regulated, as well as possible additional loads, such as a freezing of food, are dynamically reacted and so the efficiency of the household refrigerator can be optimized. In addition, it can sometimes be dispensed with by cold technical side on a use of a capillary.
  • FIG. 1 is a perspective view of an exemplary household refrigerator with a refrigerant cycle system; a schematic representation of an exemplary
  • Refrigerant cycle system with an inventive, electromotively adjustable expansion valve, a sectional view of the electric motor-adjustable expansion valve of FIG. 2 in isolation,
  • Figure 4a-d is a schematic representation of four positions of a
  • a household refrigerating appliance 1 shown by way of example in FIG. 1 has a body 2 with an inner container 3.
  • the inner container 3 is divided into a freezer compartment 4 arranged at the top and a cooling compartment 5 arranged at the bottom.
  • the freezer compartment 4 is generally used for freezing frozen food at about minus 18 degrees Celsius.
  • Freezer 4 is associated with a first evaporator 6, which is arranged behind a freezer compartment rear wall 7.
  • the freezer compartment 4 is accessible when the freezer compartment door 9 is open.
  • the freezer compartment door 9 has a first handle 10.
  • the cooling space 5 is generally used for frost-free cooling of refrigerated goods, preferably at temperatures between plus 4 and plus 8 degrees Celsius. However, the cooling space 5 can also be designed as a zero-degree compartment, in particular for keeping fruit or vegetables fresh.
  • the refrigerator compartment 5 has a rear wall 11, behind which the first evaporator 6 for the freezer compartment 4 is arranged.
  • a second evaporator 12 serves to cool the cooling space 5.
  • the cooling space 5 is accessible when the refrigerator door 14 is open. To open the refrigerator door 14 has a second handle 15.
  • a single evaporator, or the first evaporator 6 and the second evaporator 12, or any number of evaporators may be connected to a compressor 8.
  • the compressor 8 is inserted from the back, ie behind the rear wall 11 of the refrigeration device 1 into a machine room 13 of the housing 16. 2, a refrigerant circuit system 17 with a controlled expansion valve 18 is shown schematically.
  • the refrigerant cycle system 17 has a compressor 8, a condenser 19 and at least one evaporator 6, 12. Upstream of the evaporator 6, 12, the refrigerant circuit system 17 in the illustrated embodiment, a controlled expansion valve 18.
  • the compressor 8, the condenser 19, the evaporator 6, 12 and the controlled expansion valve 18 are fluidly connected via refrigerant pipes 20, 20a, 20b as shown in FIG.
  • An outlet 21 of the expansion valve 18 opens into a refrigerant pipe 20 a, which is connected directly to the evaporator 6, 12.
  • the expansion valve 18 also has an inlet 23 which is connected to the condenser 19 via another refrigerant pipe 20b.
  • the expansion valve 18 has an adjusting device 22, which is driven by means of an electric motor 24, for changing a flow rate 25a determining the flow rate of the expansion valve 18
  • the expansion valve 18 and the adjusting device 22 of the expansion valve 18 is connected in the illustrated embodiment with a control device 29.
  • the control device 29 may be a separate control unit, which only serves to control the expansion valve 18 on the basis of sensor values, for example of temperature sensors or switches, and to operate the refrigerant cycle system 17 with different flow rates, depending on the position of the expansion valve 18.
  • the control device 29 may also be a part of a higher-level control device which controls the entire household refrigeration appliance 1, in particular in response to one or more internal temperatures of at least one cooling chamber 5, the compressor 8 controls.
  • FIG. 3 shows a schematic sectional view of the electromotively adjustable expansion valve according to FIG. 2 in isolation.
  • the expansion valve 18 has a housing 30 with a bottom 30 a.
  • the bottom 30a is provided with an opening 23 forming the opening 23a.
  • the bottom 30a has an opening 21a forming the outlet 21, which determines the maximum flow cross section 25a.
  • the expansion valve 18 shown in Fig. 3 thus has a wall 30 b, which is formed in the illustrated embodiment of the bottom 30 a and which is provided with a flow-through 25, which for setting different flow cross-sections 25 a, 25 b, 25 c, 25 d (Fig 4) of the expansion valve 18 has an adjustable aperture 31 which at least partially covers the maximum flow cross-section 25a of the flow-through opening 25.
  • the aperture 31 is rotatably mounted about an axis 32 lying eccentrically to the center of the particular circular flow opening 25.
  • the shutter 31 is coupled via a gear 33 to a drive shaft 34 which is connected to the stepper electric motor 24.
  • the transmission 33 is formed as a spur gear having a first spur gear 35 connected to the input shaft 34, which meshes with a second spur gear 36 connected to the diaphragm 31.
  • the second spur gear 36 is formed integrally with the aperture 31 in the illustrated embodiment.
  • the stepping electric motor 24 is connected to the control device 29 configured to control and / or regulate the flow rate of the expansion valve 18 by changing the flow area 25, 25 a, 25 b, 5 c, 25 d by adjusting the adjusting device 22.
  • the diaphragm 31 can be formed by a disk having a contour which has at least one spiral contour section 31 a.
  • the adjusting device 22 is for stepwise changing the
  • the adjusting device 22 is driven in the illustrated embodiment of the electric stepper motor 24.
  • 4a shows the aperture 31 in a first position, in which the flow-through opening 25 is completely covered by the aperture 31, ie the flow-through opening 25 is completely closed and the flow rate is zero.
  • FIG. 4b shows the aperture 31 in a second position, in which the flow-through opening 25 is predominantly covered by the aperture 31, so that only a small flow cross-section 25c allows a flow of refrigerant and consequently the flow rate is small.
  • 4c shows the orifice 31 in a third position, in which the flow-through opening 25 is only slightly covered by the orifice 31, so that only a large flow cross-section 25b allows a flow of refrigerant and consequently the flow rate is high.
  • FIG. 4d shows the aperture 31 in a fourth position in which the flow opening 25 is not covered by the aperture 31, so that a maximum flow cross section 25a, which corresponds to the cross section of the flow opening 25, allows a flow of refrigerant and consequently the Flow rate is greatest.

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  • 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)
  • Electrically Driven Valve-Operating Means (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

L'invention concerne un appareil frigorifique ménager comportant un contenant intérieur isolé thermiquement, comprenant un compartiment intérieur, et un système de circuit de fluide frigorigène relié au moyen de conduites de fluide frigorigène pour refroidir le compartiment intérieur, qui comprend un compresseur, un condenseur, un évaporateur et une vanne d'expansion disposée entre le condenseur et l'évaporateur. La vanne d'expansion comporte un dispositif de réglage entraîné par moteur électrique, destiné à modifier la section transversale d'écoulement déterminant le débit de la vanne d'expansion.
PCT/EP2012/051286 2011-02-15 2012-01-27 Appareil frigorifique ménager comportant une vanne d'expansion Ceased WO2012110295A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011004109A DE102011004109A1 (de) 2011-02-15 2011-02-15 Haushaltskältegerät mit einem Expansionsventil
DE102011004109.5 2011-02-15

Publications (2)

Publication Number Publication Date
WO2012110295A2 true WO2012110295A2 (fr) 2012-08-23
WO2012110295A3 WO2012110295A3 (fr) 2012-10-18

Family

ID=45833341

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/051286 Ceased WO2012110295A2 (fr) 2011-02-15 2012-01-27 Appareil frigorifique ménager comportant une vanne d'expansion

Country Status (2)

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DE (1) DE102011004109A1 (fr)
WO (1) WO2012110295A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013204990A1 (de) 2013-03-21 2014-09-25 BSH Bosch und Siemens Hausgeräte GmbH Kältegerät mit einem verstellbaren Drosselorgan
DE102016224283A1 (de) 2016-12-06 2018-06-07 Hahn-Schickard-Gesellschaft für angewandte Forschung e.V. Expansionsventil
DE102017205562A1 (de) 2017-03-31 2018-10-04 Hahn-Schickard-Gesellschaft für angewandte Forschung e.V. Expansionsventil
EP3551948B1 (fr) 2016-12-06 2020-11-18 Hahn-Schickard-Gesellschaft für angewandte Forschung e.V. Vanne d'expansion

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070012055A1 (en) 2005-03-17 2007-01-18 Electrolux Home Products, Inc. Electronic referigeration control system including a variable speed compressor

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
US1836072A (en) * 1927-09-29 1931-12-15 Frigidaire Corp Refrigerating apparatus
US3325141A (en) * 1964-09-24 1967-06-13 Skendrovic Lawrence Full flow valve
US5417083A (en) * 1993-09-24 1995-05-23 American Standard Inc. In-line incremetally adjustable electronic expansion valve
JP4466888B2 (ja) * 1999-12-28 2010-05-26 株式会社鷺宮製作所 電動膨張弁
CN101762124B (zh) * 2008-11-17 2013-05-29 浙江三花股份有限公司 一种电动节流分配器及其空调系统和流量控制方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070012055A1 (en) 2005-03-17 2007-01-18 Electrolux Home Products, Inc. Electronic referigeration control system including a variable speed compressor

Also Published As

Publication number Publication date
DE102011004109A1 (de) 2012-08-16
WO2012110295A3 (fr) 2012-10-18

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