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WO2010131061A1 - Compresseur hermétiquement fermé et procédés associés - Google Patents

Compresseur hermétiquement fermé et procédés associés Download PDF

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Publication number
WO2010131061A1
WO2010131061A1 PCT/IB2009/005573 IB2009005573W WO2010131061A1 WO 2010131061 A1 WO2010131061 A1 WO 2010131061A1 IB 2009005573 W IB2009005573 W IB 2009005573W WO 2010131061 A1 WO2010131061 A1 WO 2010131061A1
Authority
WO
WIPO (PCT)
Prior art keywords
compressor
providing
motor
refrigerant
hermetic
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/IB2009/005573
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English (en)
Inventor
Harry Stenfoft Nissen
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to PCT/IB2009/005573 priority Critical patent/WO2010131061A1/fr
Publication of WO2010131061A1 publication Critical patent/WO2010131061A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
    • 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
    • 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
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide

Definitions

  • the invention relates to air conditioning and refrigeration systems, more specifically to compressors for heat pumps and air conditioning and refrigeration systems for industrial cooling and vehicles comprising hermetic technology.
  • Refrigeration is defined as the process of cooling of bodies or fluids to temperatures lower than those available in the surroundings at a particular time and place.
  • Various methods of producing low temperatures include: sensible cooling using a cold medium, endothermic mixing of substances, phase change processes, expansion of liquids, expansion of gases, thermoelectric method and magnetic method.
  • a compressor is the most important and often the costliest component of any vapour compression refrigeration system.
  • the compressor has to draw the refrigerant vapour from the evaporator, so that the low pressure and temperature can be maintained at which the refrigerant and boil extracting heat from the refrigerated space.
  • the compressor then has to raise the pressure of refrigerant to a level at which it can condense by rejecting heat to the cooling medium in the condenser.
  • Compressors for air conditioning and refrigeration systems of various kinds contain refrigerants. Historically different refrigerants have been used. Ethyl ether is the first refrigerant to be used by Jacob Perkins in 1835. Alexander Twining proposes use of the ammonia and carbon dioxide in 1850.
  • CFCs are non-toxic, nonflammable, chemically stable, compatible with the common materials and available for a wide refrigeration temperature range.
  • Rowland and Molina proposed a theory of ozone layer depletion due to CFCs released into the atmosphere.
  • Subsequent studies confirm the ozone-depleting potential of CFCs and related substances.
  • the Montreal protocol bans the use of ozone-depleting substances such as CFCs. This protocol was signed in 1987.
  • Consequences of ozone layer depletion include: skin cancer, cataracts, weakened immune systems and damage to DNA structures. Further negative consequences of ozone layer depletion are adverse effect on crop yield and adverse effect on terrestrial and aquatic ecosystems. CFCs are also considered to contribute significantly to global warming. CFCs can absorb a lot more long wave length energy than carbon dioxide, and therefore it has a environmentally negative impact on the greenhouse effect. Carbon dioxide on the other hand is non-toxic, it has a greenhouse effect as low as 1 and it does not deplete the ozone layer. Carbon dioxide is the reference refrigerant when measuring the greenhouse effect of refrigerants. This is why carbon dioxide has a greenhouse effect on 1.
  • a very good approach in order to decrease the amount of refrigerants which are released in the environment is to use hermetic compressors in air conditioning- and refrigeration systems.
  • Such compressors are used today in household refrigerators, residential air conditioners and in smaller commercial air conditioning and refrigeration units. They are, however, not used in heat pumps or in air conditioning- and refrigeration systems for vehicles and industrial cooling.
  • carbon dioxide has previously been used in non-hermetic systems, e.g. on cargo ships for refrigeration purposes where the under critical carbon dioxide gas process was used. The use of this process decreased.
  • One problem with this process is that it was unable to provide sufficient cooling in hot regions of the world.
  • Prof Gustaf Lorenzen from Sintef in Trondheim, Norway has played an important part in the revival of the carbon dioxide compressor, especially in relation to the super critical carbon dioxide gas process. Further information is provided in Lorenzen (1994).
  • the object of the present invention to provide an electrically driven hermetic compressor to be used in heat pumps and in air conditioning- and refrigeration systems for vehicles and industrial cooling.
  • the invention consists of simple mechanics and advanced electronics.
  • the resulting product is a mechatronics product. It is a combination of mechanics, fluid dynamic, thermodynamic and electronics.
  • Thermodynamics is the study of energy interactions between systems and the effect of these interactions on the system properties.
  • the intelligence is in the electronic, the power and the thermodynamics are in the mechanics in mechatronics products.
  • Figure 1 shows an example of an embodiment of the present invention in the form of a compressor comprising hermetic compressor technology and being electrically driven.
  • Figure 2 shows an example of a valve system for carbon dioxide compressors.
  • a compressor comprising at least one block (1), at least one crank (2), at least one stator (3), at least one rotor (4), at least one input shaft (5), at least one connecting rod (6), at least one piston ball joint (7), at least one piston (8), at least one cap (9), at least one intake tank (10), at least one discharge chamber (11), at least one discharge valve (12), at least one intake valve (13), at least one cap screw (14), wire coils (15), at least one oil pump (16) and at least one cylinder (17).
  • the invention also contains refrigerants, which are not included in figure 1.
  • the refrigerant- or combination of refrigerants can be of any type of refrigerant.
  • the refrigerant- or combination of refrigerants will have greenhouse effect below 10 and normally these would be embodied in the cylinder (17), the intake tank (10), the discharge tank (11) and also pulsate through the intake valve (13) and the discharge valve (12).
  • the resulting compressor is hermetic and electrically driven.
  • Figure 2 displays an example of the valve system according to figure 1, constituted by an intake valve (13), a discharge valve (12) and a cylinder (17).
  • a cylinder head is constituted by the cap screws (14), the cap (9), the intake tank (10), the discharge chamber (11), the intake valve (13) and the discharge valve (12).
  • the aforementioned elements can be provided in a number of ways and positioned in relation to each other in a number of ways.
  • One such way, not excluding other alternative ways, still referring to figure 1, would include a block (1) being fixedly attached to a cylinder (17).
  • the cylinder (17) contains a piston (8), piston ball joint (7) and a connecting rod (6).
  • the connecting rod (6) being movably attached to a crank (2), which is fixedly attached to the block (1).
  • the input shaft (5) connects the crank (2) with the motor which consists of stator (3), rotor (4), input shaft (5), wire coils (15) and oil pump (16).
  • Stator (3) and rotor (4) are symmetrically positioned around the input shaft (5).
  • an oil pump (16) or lubrication pump is provided.
  • Fixedly connected to the stator (3) wire coils (15) are positioned.
  • the motor may comprise an inverter.
  • compressors can be classified into different types. Generally it is common to distinguish between two main groups which are firstly positive displacement compressors and secondly roto dynamic compressors. Positive displacement compressors include for instance reciprocating compressors, rotary compressors, screw compressors and scroll compressors. Roto dynamic compressors include for instance centrifugal compressors and axial compressors. Other types of compressors concern: vertical two cylinder compressors; horizontal, single cylinder compressors; carbon dioxide compressors; oil free sulphur dioxide compressors; horizontal and double acting compressors.
  • compressors include electric motor driven compressors; high-speed compressors which operate with rotation speeds of more than 500 rpm; diaphragm compressors; rotary vane mastery compressors and rolling piston compressors.
  • New compressor types such as the linear piston compressor, the trochoidal compressor and the acoustic compressor are at various levels of development.
  • Hermetic compressor technology enables a compressor to avoid leakage of refrigerant from compressors.
  • the stuffing box can be mentioned.
  • some compressors have hermetic compressor motor assembly contained in a welded steel case.
  • Another part of what can be considered as constituting hermetic compressor technology concerns hermetic compressor-motor assemblies being contained in a casting with no penetration by a rotating shaft and with gasketed cover plates for access to key parts such as valves and connecting rods.
  • the stator (3), the rotor (4), the intake shaft (5), the oil pump (16) or lubrication pump, and the wire coils (15) constitute a motor.
  • motors and engines may be used in relation to the present invention.
  • an electro motor such as for instance a permanent magnet motor may be used not excluding other alternative motors and engines.
  • These motors may be for instance AC motors or DC motors. Both AC and DC motors can be used not excluding other types.
  • AC will typically be used for heat pumps and air conditioning- and refrigeration systems for industrial cooling
  • DC motors preferably will be used for air conditioning- and refrigeration systems for vehicles.
  • the motor may have variable rotation speed and inverter.
  • the refrigerant used in the compressor can be any type of refrigerant.
  • the refrigerant used in the compressor has greenhouse effect below 10, not excluding other refrigerants. I'm very relevant refrigerant to use would be carbon dioxide.
  • the block (1) may have any geometric shape.
  • One preferred shape of the block (1) is double curved, since this shape reduces noise.
  • crank (2) may have a crankshaft which may rotate when the compressor is functioning.
  • Piston (8) and connecting rod (6) constitute oscillating masses when the compressor is functioning.
  • the rotating masses, such as a crankshaft, and oscillating masses, such as the piston (8) and the connecting rod (6) may be balanced.
  • the oil pump (16) or lubrication pump is preferably a positive volume displacement pump. It may also concern traditional lubricant pumps such as pick up pumps, but more relevant lubrication pumps concern positive volume displacement pumps since when using these pumps the volume displacement is not dependent upon rotation speed.
  • positive volume displacement pumps should be understood as including all types such as piston pumps, gear pumps, gerrotor pumps etc, not excluding other types of pumps.
  • the stator (3) may preferably be made of iron sheets. These iron sheets may for instance be 0,5mm thick.
  • the present invention may be provided in various ways and any type of material such as metals may be used for the manufacture.
  • a cylinder head is constituted by the cap screws (14), the cap (9), the intake tank (10), the discharge chamber (11), the intake valve (13) and the discharge valve (12).
  • At least one block (1) at least one crank (2), at least one stator (3), at least one rotor (4), at least one input shaft (5), at least one connecting rod (6), at least one piston ball joint (7), at least one piston (8), at least one cap (9), at least one intake tank (10), at least one discharge chamber (11), at least one discharge valve (12), at least one intake valve (13), at least one cap screw (14), wire coils (15), at least one oil pump (16) and at least one cylinder (17).
  • refrigerants will also be provided, which are not included in figure 1.
  • the refrigerant- or combination of refrigerants can be provided in the form of any type of refrigerant.
  • the refrigerant- or combination of refrigerants will have greenhouse effect below 10 and normally these would be embodied in the cylinder (17), the intake tank (10), the discharge tank (11) and also pulsate through the intake valve (13) and the discharge valve (12).
  • the resulting compressor is hermetic and electrically driven.
  • the connecting rod (6) may be connected to at least one journal gearing.
  • compressors of the positive displacement type compression is achieved by trapping a refrigerant vapour into an enclosed space and then reducing its volume. Since a fixed amount of refrigerant is trapped each time, its pressure rises as its volume is reduced. When the refrigerant pressure inside the compressor rises to the level of condensing pressure, then the refrigerant is expelled from the enclosed space and a fresh charge of refrigerant is drawn in and the cycle continues.
  • a preferred way of functioning of the invention could be the following: By means of the electro motor constituted by the stator (3), the rotor (4), the intake shaft (5), the wire coils (15) and oil pump (16), the piston (8) is brought to move back and forth in the cylinder (17).
  • the intake valve (13) opens and the refrigerant vapor enters.
  • the increased pressure closes the intake valve (13).
  • the discharge valve (12) opens thereby permitting the refrigerant vapor at the higher pressure to exit.
  • the refrigerant in the intake tank (10) evaporates it creates a cooling effect.
  • the suction pressure in the intake tank (10) is lower than the high-pressure or delivery pressure in the discharge chamber (11).
  • a cooling effect is occurring in relation to the intake tank (10) and a heating effect is taking place in relation to the discharge chamber (11).
  • the process is reversible.
  • Effect is measured in joules/time in seconds. In relation to air conditioning- and refrigeration systems, effect is called enthalpy and it is measured in kilojoules per kilogram circulated cooling amount.
  • Flow work is the work done when a fluid enters or leaves a control volume. The specific flow work is the product of pressure and specific volume.
  • Enthalpy of a system is equal to the internal energy of the system plus flow work.
  • Preferred processes to function with the invention are the under critical carbon dioxide gas process and particularly the supercritical carbon dioxide gas process possibly in the plasma area not excluding other relevant processes preferably combined with refrigerants having greenhouse effect below 10.
  • Various methods relate to the present invention such as: applying a hermetic and electrically driven compressor in a vehicle; applying a hermetic and electrically driven compressor in a heat pump; applying a hermetic and electrically driven compressor in relation to industrial cooling.
  • Preferable methods can include the following steps of: fixedly attaching a block (1) to a cylinder (17); providing the cylinder (17) such that the piston (8) contained in the cylinder (17) can move back and forth in the cylinder touching at least one surface of said cylinder; movably attaching a piston ball joint (7) to a piston (8); movably attaching a piston ball joint (7) and a connecting rod (6); movably attaching the connecting rod (6) to a crank (2); fixedly attaching a crank (2) to a block (1); providing the input shaft (5) such that it connects the crank (2) with the motor which
  • Further methods and steps may concern: providing the compressor motor with variable rotation speed and an inverter; providing the refrigerant such that it has greenhouse effect below 10; providing the motor such that it is a permanent magnet motor; providing the block (1) such that it has double curved shape preferably reducing noise; providing the rotating masses of the crankshaft and the oscillating masses of the piston (8) and the connecting rod (6) such that both masses are balanced with each other; providing the lubrication pump (16) of the positive volume displacement type; providing more than one cylinder; providing the motor such that it is an AC motor; providing the motor such that it is a DC motor; providing the stator using iron sheets preferably of 0.5 mm thickness each.
  • at least one compressor is positioned in the motor body of a vehicle.
  • the motor of the compressor is using high- voltage power. From the battery or the motor of the vehicle comes 12 V or 24 V DC power which enters the cable throughput, via said cable throughput it enters the motor of the compressor. If a permanent magnet motor is provided in the motor of the compressor, this motor inverts the DC to magnetic fields which drive the motor and thereby the compression through the piston (8).
  • the battery and the generator of the vehicle deliver DC power.
  • the wire coils (15) or cables will preferably be provided through the cable house of the vehicle, which is typical for hermetic compressors. The cables can be put through the cable house in the vehicle without isolating the cable throughput. Each phase is isolated independently. Typically, three phases will be needed in order to deliver as big an effect as it is needed for vehicles.
  • the compressor will contain an engine being from 1-5 kW.
  • a heat pump is a machine or device which moves heat from one location (the 'source') to another location (the 'sink' or 'heat sink 1 ) using mechanical work. Most heat pump technology moves heat from a low temperature heat source to a higher temperature heat sink.
  • a common example is reversible-cycle heat pumps for providing thermal comfort. Heat pumps can also operate in reverse, providing heat. Heat pumps can be thought of as a heat engine which is operating in reverse.
  • One common type of heat pump works by exploiting the physical properties of a refrigerant.
  • a heat pump In heating, ventilation, and air conditioning applications, a heat pump normally refers to a vapour compression refrigeration device that includes a reversing valve and optimised heat exchangers, so that the direction of heat flow may be reversed. Most commonly, heat pumps draw heat from the air or from the ground. For heat pump applications 110 V in the US and 380 V in EU will be provided for the compressor, either one phased or three phased power. Cooling is provided on the side of the intake tank and heating is provided on the side of the discharge chamber and this can be exploited in order to provide both cooling and heating. Another application for the present invention includes industrial cooling which concerns air conditioning and refrigeration processes in relation to any type of industrial process such as manufacturing including pharmaceutical processes excluding warehouses and other types of commercial refrigeration. Industrial applicability
  • the present invention creates a number of advantages. Generally, hermetic compressor systems have longer lifetime and a much lower level of service is needed. Regardless of the application hermetic systems will work in 20,000-30,000 hours and sometimes 50,000-60,000 hours.
  • the present invention comprises few mechanical parts which secures that no undue use of material and thereby natural resources is made. Due to the high density- and volumetric pressure of the refrigerant, carbon dioxide compressors generally have smaller pistons than other compressors. Therefore the weight of these compressors is normally lower and they are normally cheaper.
  • the present invention facilitates a reduction of the quantity of mechanical components needed in the compressor, which in turn improves the reliability of the compressor.
  • journal bearings may be used in all bearing surfaces, which makes it possible to prevent compressor constructions where there is contact between metallic surfaces.
  • the resulting advantage is a longer life of the compressor.
  • One exception from this benefit could be the piston ball bearing or the piston ball joint, but in this bearing, movement is minimal and therefore abrasion and risk of reduced lifetime of the compressor, is minimal.
  • a hermetic compressor secures that no refrigerant is spread in the environment in the lifetime of the compressor. Since the invented compressor is hermetic there is no leakage and it will not need to be refilled with additional refrigerant during its lifetime, which is environmentally beneficial, especially in relation to the greenhouse effect. Also, service costs related to refilling, are saved for the user. For the service personnel the risk related to carbon dioxide refrigerant of increased breathing rates if concentrations rise above the natural level of atmospheric air, which might happen in case of leakage, is avoided with hermetic compressors since no risk of leakage exists.
  • a further benefit is that when applying the present invention in vehicles, the air conditioning and refrigeration system will last the lifetime of the vehicle without costing the user anything in service costs etc. Also it is advantageous that the present invention makes flexible cables redundant since the new compressor would be able to be positioned in the motor body of a vehicle instead of being positioned on the motor as in the previous systems. In previous systems it was necessary to use flexible cables. By applying the present invention it is not necessary to use flexible cables. There are no movements between compressor and heat exchanger. As a consequence thereof there is no need for flexible cables. Since the electro motor of the compressor may have variable rotation speed, a further advantage of the present invention is that the effect can be adapted to the size of the vehicle.
  • An important advantage with the present invention is that the compressor can be embodied anywhere in the vehicle for instance in order to minimize noise emission to the passenger compartment. This opportunity, which is facilitated by the present invention, also makes it possible to optimize the weight distribution for the vehicle. Furthermore the present invention makes it possible to have engine output refrigeration to glove box, centre console and rear seat refrigerator for instance in luxury vehicles without the addition of a second refrigeration system over and above the motor vehicle air conditioning (MVAC) system.
  • MVAC motor vehicle air conditioning
  • a further advantage with the present invention is that it is able to facilitate that no sudden impact on engine torque takes place in vehicles with relatively small torque.

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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)
  • Chemical Kinetics & Catalysis (AREA)
  • Compressor (AREA)

Abstract

L'invention porte sur un compresseur pour des systèmes de pompes à chaleur et de réfrigération et de conditionnement d'air, pour le refroidissement de véhicules et le refroidissement industriel, qui a un compresseur hermétique et de préférence qui est entraîné par un moteur électrique. Un mode de réalisation préféré de la présente invention comprend au moins l'un de chacun des objets suivants, en n'excluant pas d'autres objets possibles : un bloc (1), une manivelle (2), un stator (3), un rotor (4), un arbre d'entrée (5), une tige de liaison (6), un joint à rotule de piston (7), un piston (8), un capuchon (9), un réservoir d'admission (10), une chambre de décharge (11), une soupape de décharge (12), une soupape d'admission (13), un capuchon vissé (14), des bobines de fil métallique (15), une pompe à huile (16) et un vérin (17). L'invention concerne également des réfrigérants présentant de préférence un effet de serre inférieur à 10. Les réfrigérants sont inclus de préférence dans le vérin (17), le réservoir d'admission (10) et le réservoir de décharge (11), et sont également pulsés dans la soupape d'admission (13) et la soupape de décharge (12). Le compresseur résultant est hermétique et entraîné électriquement.
PCT/IB2009/005573 2009-05-12 2009-05-12 Compresseur hermétiquement fermé et procédés associés Ceased WO2010131061A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IB2009/005573 WO2010131061A1 (fr) 2009-05-12 2009-05-12 Compresseur hermétiquement fermé et procédés associés

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2009/005573 WO2010131061A1 (fr) 2009-05-12 2009-05-12 Compresseur hermétiquement fermé et procédés associés

Publications (1)

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WO2010131061A1 true WO2010131061A1 (fr) 2010-11-18

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PCT/IB2009/005573 Ceased WO2010131061A1 (fr) 2009-05-12 2009-05-12 Compresseur hermétiquement fermé et procédés associés

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103507087A (zh) * 2012-06-25 2014-01-15 威格高纯气体设备科技（苏州工业园区）有限公司 一种无振动低温手套箱
USD887788S1 (en) 2017-05-17 2020-06-23 Dometic Sweden Ab Cooler
USD888503S1 (en) 2017-05-17 2020-06-30 Dometic Sweden Ab Cooler
USD933449S1 (en) 2016-11-22 2021-10-19 Dometic Sweden Ab Latch
US11414238B2 (en) 2016-11-22 2022-08-16 Dometic Sweden Ab Cooler

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EP0386321A1 (fr) * 1989-03-08 1990-09-12 Tecumseh Products Company Compresseur hermétique comprenant un montage interne élastique
US6631617B1 (en) * 2002-06-27 2003-10-14 Tecumseh Products Company Two stage hermetic carbon dioxide compressor
JP2005307845A (ja) * 2004-04-21 2005-11-04 Matsushita Electric Ind Co Ltd 密閉型圧縮機
JP2006011493A (ja) * 2004-06-22 2006-01-12 Sanden Corp 自動販売機
EP1630420A1 (fr) * 2003-06-02 2006-03-01 Daikin Industries, Ltd. Compresseur ferme
JP2006105458A (ja) * 2004-10-04 2006-04-20 Mitsubishi Electric Corp 冷媒循環装置及び密閉形圧縮機
US20070059189A1 (en) * 2003-10-10 2007-03-15 Matsushita Electric Industrial Co., Ltd. Hermetic compressor and manufacturing method of suction muffler
EP1911975A1 (fr) * 2006-10-04 2008-04-16 Sanden Corporation Compresseur électrique scellé

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0386321A1 (fr) * 1989-03-08 1990-09-12 Tecumseh Products Company Compresseur hermétique comprenant un montage interne élastique
US6631617B1 (en) * 2002-06-27 2003-10-14 Tecumseh Products Company Two stage hermetic carbon dioxide compressor
EP1630420A1 (fr) * 2003-06-02 2006-03-01 Daikin Industries, Ltd. Compresseur ferme
US20070059189A1 (en) * 2003-10-10 2007-03-15 Matsushita Electric Industrial Co., Ltd. Hermetic compressor and manufacturing method of suction muffler
JP2005307845A (ja) * 2004-04-21 2005-11-04 Matsushita Electric Ind Co Ltd 密閉型圧縮機
JP2006011493A (ja) * 2004-06-22 2006-01-12 Sanden Corp 自動販売機
JP2006105458A (ja) * 2004-10-04 2006-04-20 Mitsubishi Electric Corp 冷媒循環装置及び密閉形圧縮機
EP1911975A1 (fr) * 2006-10-04 2008-04-16 Sanden Corporation Compresseur électrique scellé

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103507087A (zh) * 2012-06-25 2014-01-15 威格高纯气体设备科技（苏州工业园区）有限公司 一种无振动低温手套箱
USD933449S1 (en) 2016-11-22 2021-10-19 Dometic Sweden Ab Latch
US11414238B2 (en) 2016-11-22 2022-08-16 Dometic Sweden Ab Cooler
US11535425B2 (en) 2016-11-22 2022-12-27 Dometic Sweden Ab Cooler
USD985359S1 (en) 2016-11-22 2023-05-09 Dometic Sweden Ab Latch
USD995264S1 (en) 2016-11-22 2023-08-15 Dometic Sweden Ab Latch
US12371227B2 (en) 2016-11-22 2025-07-29 Dometic Sweden Ab Cooler
USD1106797S1 (en) 2016-11-22 2025-12-23 Dometic Sweden Ab Latch
USD887788S1 (en) 2017-05-17 2020-06-23 Dometic Sweden Ab Cooler
USD888503S1 (en) 2017-05-17 2020-06-30 Dometic Sweden Ab Cooler

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