KR20170004808A - Accumulator for use in a refrigerant circuit of an air conditioning system - Google Patents

Accumulator for use in a refrigerant circuit of an air conditioning system Download PDF

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Publication number
KR20170004808A
KR20170004808A KR1020150185493A KR20150185493A KR20170004808A KR 20170004808 A KR20170004808 A KR 20170004808A KR 1020150185493 A KR1020150185493 A KR 1020150185493A KR 20150185493 A KR20150185493 A KR 20150185493A KR 20170004808 A KR20170004808 A KR 20170004808A
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KR
South Korea
Prior art keywords
refrigerant
accumulator
discharge line
boiling means
housing
Prior art date
Application number
KR1020150185493A
Other languages
Korean (ko)
Inventor
토니 스피스
Original Assignee
한온시스템 주식회사
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Filing date
Publication date
Application filed by 한온시스템 주식회사 filed Critical 한온시스템 주식회사
Publication of KR20170004808A publication Critical patent/KR20170004808A/en

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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
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/006—Accumulators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00492—Heating, cooling or ventilating [HVAC] devices comprising regenerative heating or cooling means, e.g. heat accumulators
    • 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
    • F25B23/00—Machines, plants or systems, with a single mode of operation not covered by groups F25B1/00 - F25B21/00, e.g. using selective radiation effect
    • F25B23/006—Machines, plants or systems, with a single mode of operation not covered by groups F25B1/00 - F25B21/00, e.g. using selective radiation effect boiling cooling systems
    • 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
    • F25B30/00—Heat pumps
    • F25B30/02—Heat pumps of the compression 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
    • F25B2500/00—Problems to be solved
    • F25B2500/01—Geometry problems, e.g. for reducing size
    • 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
    • F25B2700/2113—Temperatures of a suction accumulator

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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)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

The present invention relates to an accumulator for use in a refrigerant circuit of an air conditioner, in particular an accumulator for use in a car air conditioner, the accumulator comprising a housing (10) connected to a refrigerant supply line (8.1) And a refrigerant discharge line (8.2) arranged in a tube shape bent inside the housing (10), wherein the tube inlet in the refrigerant discharge line is supported above the refrigerant liquid level (7) in the housing . The accumulator according to the present invention also includes a geometrical boiling means 9 for liquid refrigerant disposed inside the housing.

Description

TECHNICAL FIELD [0001] The present invention relates to an accumulator for use in a refrigerant circuit of an air conditioner. BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to an accumulator for use in a refrigerant circuit of a compression refrigeration machine, and more particularly to an accumulator for use in an air conditioner of a vehicle.

In compression refrigerators, an accumulator is typically located after the evaporator, in order to ensure phase separation of a part of the refrigerant from the evaporator in a gaseous state and partly in a liquid state. In this case, the accumulator is used not only for storing refrigerant but also for drying and filtration of refrigerant. In the case of conventional refrigerant circuits, in particular in the refrigerant circuit of the heat pump systems, after the accumulator, there is arranged a compressor which causes a pressure drop in this accumulator during the initial operation. This pressure drop causes the boiling temperature of the refrigerant in the accumulator to fall off significantly faster than the liquid phase itself in many cases and as a result, the superheated liquid, which can be quickly evaporated by a small pulse, Lt; / RTI > This action, also known as delay in boiling, causes a rapid conversion of the refrigerant from the liquid phase to the gaseous phase, resulting in a significant density drop with distinctive volume expansion. The pressure wave resulting from the specific volume expansion then passes through the system, which is coupled to undesired noise generation, causing vibration. In addition, there is a problem that the system components may be more unreasonably used and damaged due to the pressure fluctuation or vibration as described above.

Accumulators of the type mentioned in the introduction are known, for example, from US 5,970,738 A. Such an accumulator has a J-shaped tube at the outlet side for drawing gas-phase refrigerant and liquid phase oil, which can be disposed within the housing of the accumulator and at least locally in contact with the liquid phase. The surface of the J-shaped tube, which is generally smooth and able to contact the liquid phase refrigerant, can not ensure sufficient bubble formation to block the impending boiling retardant to the desired extent.

A solution for preventing noise generation caused by the boiling retardation in the accumulator is known from US6389842 B1. In this case, a local cross-sectional increase of the refrigerant discharge line of the accumulator is defined, and the refrigerant discharge line is arranged in the form of a J-shaped tube inside the accumulator. The outlet side volume of the accumulator, which is enlarged due to the increase in the cross section of the refrigerant discharge line, causes a pressure drop delay in the accumulator when the compressor disposed behind such accumulator is turned ON. Furthermore, cross-sectional enhancement promotes a lower flow rate, which results in evaporation of the liquid refrigerant in the refrigerant discharge line at the start of the system and reduced risk of boiler failure. The proposed solution has the disadvantage that the overheating (on) of the liquid is only slightly reduced since the pressure drop is only delayed. - especially in liquids outside the J-shaped tube - does not result in the introduction of activity of the boiling retardant through structural action and prevention of non-stability.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an accumulator for a compression refrigerator capable of reducing the risk of freezing of the refrigerant.

The above problem is solved by an accumulator according to the features of claim 1. Preferred improvements of the accumulator according to the invention can be achieved by the features detailed in the dependent claims.

An accumulator according to the present invention for use in a refrigerant circuit of a compression refrigerator, particularly for use in an automotive air conditioner, comprises a housing formed by a collection container for a refrigerant and connected to a refrigerant supply line, Wherein the tube inlet in such a refrigerant discharge line is supported above the refrigerant liquid level in the housing. The accumulator according to the present invention also includes a geometric boiling means for liquid refrigerant disposed inside the housing.

An advantage of the accumulator according to the invention is that the increase of the contact surface is achieved in the refrigerant present in the liquid phase due to the geometric boiling means, which means a three-dimensional object disposed in the housing. The increased contact surface increases the likelihood of vapor bubble formation in the liquid phase refrigerant and introduces a boiling process, which reduces the risk of boiling retardation when the pressure drop in the accumulator is rapid. By this method, it is possible to prevent undesired noise generation due to the unbalanced body and to improve the system sound. Preferably also, less load is secured of the accumulator and additional components of the compression refrigerator without sudden pressure fluctuations, which can help increase the overall device life.

It can be seen that the air conditioner means a compression refrigerator or a compression heat pump. Therefore, the accumulator according to the present invention can be used in a compression refrigerator or a heat pump system.

There is basically no limitation with respect to the form and structure of the geometrical boiling means in order to achieve the increase of the contact surface in the liquid refrigerant. The geometric boiling means may be formed in many parts, in particular, so as to optimally utilize available space within the housing. Integral boiling means formed into a single portion may also be considered. Above all, the boiling means formed of one or more portions may have a simple lamella structure, a fan type structure or a grid structure which can be manufactured simply in the manufacturing arts.

In addition, the geometric boiling means may have surface structure to increase the contact surface. Particularly, structures having sharp corners and / or pointed ends which inhibit the boiling retardant by forming steam bubbles may be preferable. Such surface structuring may also be formed in an irregular relief shape having a plurality of different edge structures.

In addition, the formation of vapor bubbles is also produced by a fine surface quality. The surfaces of the geometric boiling means can have as high a roughness as possible, such roughness being greater than Ra 3.2 탆. Such roughness can be achieved by various processing methods such as, for example, milling, etching or sandblasting.

In one preferred embodiment of the accumulator according to the invention, the boiling means can be formed of a porous material or a porous construction material. For example, sintered bodies that may have a defined porosity are contemplated. Metallic, polymeric or ceramic materials or fabrication materials may be considered. With the porous material, a large contact surface for the refrigerant can be realized in a small space at the same time with a small weight.

Above all, the accumulator according to the present invention can be used in various refrigerants. For the purpose, the housing, the refrigerant guide lines (supply line and discharge line) and the boiling means may be made of a material which is resistant to refrigerants, in particular refrigerants R134a, R1234yf and R744 and oils. As a material for the housing, the refrigerant guide lines (supply line and discharge line) and the boiling means, aluminum or an aluminum alloy is proved to be desirable because aluminum has high mechanical strength, low weight and excellent durability.

What is important for the function of the geometric boiling means is the arrangement within the housing. For the purpose, such boiling means should be arranged such that a suitable contact surface with the refrigerant liquid phase can be ensured. Especially in this case, boiling means should always be located below the refrigerant liquid level.

In one embodiment of the accumulator according to the invention, the boiling means can be arranged in the refrigerant discharge line, in which case the refrigerant discharge line must at least locally penetrate the liquid phase refrigerant or be located in the liquid phase refrigerant. In this case, there is no limitation with regard to the fixing method, and as a result, the boiling means can be disposed or fixed to the refrigerant discharge line by a forced coupling method, a shape-coupling method, or a material coupling method. Due to the structure of the refrigerant discharge line (J-shaped tube or U-shaped tube), the boiling means can be arranged and fixed around the refrigerant discharge line in the form of a ring disc arranged spaced apart. This arrangement of the boiling means can also be realized when the coaxial line is used as the refrigerant discharge line. The coaxial tube means a combination of coaxially arranged outer and inner pipes.

In a further embodiment of the accumulator according to the invention, the boiling means can be arranged in a position having two line sections with the refrigerant discharge line facing each other due to its curved profile, so that the boiling means is located between the refrigerant discharge lines Respectively. By this arrangement, for example, boiling means can be provided in the form of a flexible zigzag structure which is fixed between itself and supported between opposing line sections.

An embodiment may also be provided in which the refrigerant discharge line is a geometric boiling means for the liquid phase refrigerant, wherein the surface of the refrigerant discharge line has a corresponding surface quality which aids in forming vapor bubbles in order to block the boiling retardation of the liquid phase refrigerant in the accumulator Structured. In this case, the refrigerant discharge line may be formed in the form of a J-shaped tube, a U-shaped tube, or a coaxial tube, which is generally disposed or supported in a liquid-phase refrigerant.

Furthermore, the accumulator according to the invention can be used as a component in a combined unit consisting of an accumulator and in a heat exchanger arranged in the above-described preferred embodiments.

Further details, features and advantages of the formation examples of the present invention are set forth in the following description of embodiments cited with reference to the accompanying drawings.

1 is a schematic view of a first embodiment of an accumulator according to the present invention as a component of a compression refrigerator,
2 is a schematic view of a second embodiment of an accumulator according to the invention as a component of a compression refrigerator, and
3 is a schematic view of a third embodiment of an accumulator according to the present invention as a component of a compression refrigerator.

Fig. 1 schematically shows a first embodiment of an accumulator 6 according to the invention for use in the cooling circuit 1 of a compression refrigerator, which is illustratively shown. In addition to the accumulator 6, the compression refrigerator includes a compressor 2 for compressing gaseous refrigerant in a refrigerant transfer direction (arrow direction), a condenser (optionally a gas cooler) 3, an expansion valve 4, And an evaporator 5, in which case the accumulator 6 is disposed between the evaporator 5 and the compressor 2. Repeated parts are provided with the same reference numerals in the drawings and the subsequent figures.

The housing 10 of the accumulator 6 formed of a collection container for a refrigerant has a refrigerant supply line 8.1 coming from the evaporator 5 and this refrigerant supply line extends from the top into the interior of the housing 10. [ Reference numeral 8.2 denotes a refrigerant discharge line formed in the form of a J-shaped tube, which is used for recirculating gaseous refrigerant and oil to the compressor 2. In this case, the inlet of the refrigerant discharge line 8.2 is supported above the refrigerant liquid level 7, which represents the refrigerant charge level and forms the upper boundary between the liquid state and the gaseous state refrigerant. Due to the J-shaped configuration, the refrigerant discharge line 8.2 has a hollow in which an oil filter (not shown) can be placed. In addition, the inside of the housing of the accumulator 6 includes a lid 11, which serves as an inlet for the refrigerant in the gaseous state of the refrigerant discharge line 8.2, which is preferable for the refrigerant supplied through the refrigerant supply line 8.1 So as to be protected from unintended insertion. At the same time, the lid 11 is used as a baffle plate of the refrigerant supplied through the refrigerant supply line 8.1.

In order to increase the solid surface which can come into contact with the liquid refrigerant, the accumulator 6 has a geometrical boiling means 9, which is located at a position lower than the refrigerant liquid level 7, in the form of a plurality of ring discs made of aluminum Is disposed around the refrigerant discharge line (8.2). A ring-shaped spacer, not shown in the drawing, is disposed between the ring disks to ensure as large a contact surface as possible for the liquid phase refrigerant. The surface of the ring disks has a sharp-edged relief. In particular, the edges of this relief create vapor bubbles during pressure drop in the accumulator 6, which is caused when the compressor 2 is powered on, resulting in a reduced risk of suddenly occurring boilers. Eventually, unwanted noise can be prevented.

In the case of the embodiment shown in the figure, the components of the accumulator 6 are made of aluminum or an aluminum alloy. Above all, the entire refrigerant guide lines connecting the components of the compression refrigerator are formed of aluminum or an aluminum alloy.

2 shows a further embodiment of an accumulator 6 according to the invention used in the cooling circuit 1 of a compression refrigerator. Unlike FIG. 1, the boiling means 9 is formed in the form of a lamellar structure having a plurality of flat lamellas spaced apart. The lamellar structure formed of the aluminum alloy is supported by threaded rods (not shown) guided into the bores of the individual lamellas. In this case, spacers (not shown) are disposed between the lamellae in order to secure a contact surface between the lamella surfaces and the refrigerant. The threaded rods provided to support the lamellae can be connected to the housing 10 or the refrigerant discharge line 8.2 to enable stable support at a location below the refrigerant liquid level 7 in the liquid phase. Conditions effective for forming suitable vapor bubbles are achieved, in particular, by having the lamellas have a surface roughness Ra greater than 3.2 m.

Fig. 3 shows a third embodiment of the accumulator 6 according to the present invention used in the cooling circuit 1 of the compression refrigerator. The accumulator 6 shown in Fig. 3 is distinguished from the accumulator shown in Figs. 1 and 2 in that the boiling means is formed in the form of a zigzag structure having a plurality of flat members. The zig-zag structure has sufficient flexibility to be secured between the two line sections in a manner that itself supports the refrigerant discharge line (8.2) formed by the J-shaped tube.

1: cooling circuit
2: Compressor
3: condenser / gas cooler
4: Expansion valve
5: Evaporator
6: Accumulator
7: Refrigerant liquid level
8.1: Refrigerant supply line
8.2: Refrigerant discharge line
9: Geometric boiling means
10: Housing
11: Cover

Claims (8)

A housing 10 connected to a refrigerant supply line 8.1 and formed of a collection container for a refrigerant, a refrigerant discharge line 8.2 arranged in a tube shape bent inside the housing 10, And a boiling means (9) for the liquid refrigerant, wherein the tube inlet in the refrigerant discharge line is supported above a refrigerant liquid level (7) An accumulator for use. The method according to claim 1,
Characterized in that the geometrical boiling means (9) is a body made up of one or more parts having a lamella structure, a fan type structure or a grid structure.
Accumulator. 3. The method according to claim 1 or 2,
Characterized in that the geometrical boiling means (9) has a surface structure.
Accumulator. 4. The method according to any one of claims 1 to 3,
Characterized in that the geometrical boiling means (9) exhibits a fine surface quality with a surface roughness Ra greater than 3.2 m.
Accumulator. 5. The method according to any one of claims 1 to 4,
Characterized in that said geometrical boiling means (9) are formed of a porous material or a porous construction material.
Accumulator. 6. The method according to any one of claims 1 to 5,
Characterized in that said housing (10), refrigerant guide lines (8.1 / 8.2) and geometric boiling means (9) are made of a material resistant to refrigerants and oils,
Accumulator. 7. The method according to any one of claims 1 to 6,
Characterized in that the geometrical boiling means (9) are arranged in the refrigerant discharge line (8.2), around the refrigerant discharge line (8.2), or between the refrigerant discharge line (8.2)
Accumulator. 8. The method according to any one of claims 1 to 7,
Characterized in that said refrigerant discharge line (8.2) is said geometric boiling means.
Accumulator.


KR1020150185493A 2015-07-01 2015-12-23 Accumulator for use in a refrigerant circuit of an air conditioning system KR20170004808A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015110570.5 2015-07-01
DE102015110570.5A DE102015110570A1 (en) 2015-07-01 2015-07-01 Accumulator for use in a refrigerant circuit of an air conditioner

Publications (1)

Publication Number Publication Date
KR20170004808A true KR20170004808A (en) 2017-01-11

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KR1020150185493A KR20170004808A (en) 2015-07-01 2015-12-23 Accumulator for use in a refrigerant circuit of an air conditioning system

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DE (1) DE102015110570A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018077016A (en) * 2016-11-10 2018-05-17 サンデン・オートモーティブクライメイトシステム株式会社 accumulator
DE102019111017A1 (en) * 2019-04-29 2020-10-29 Wolf Gmbh Refrigerant separator for a heat pump system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4217765A (en) * 1979-06-04 1980-08-19 Atlantic Richfield Company Heat exchanger-accumulator
US5970738A (en) 1995-09-19 1999-10-26 Automotive Fluid Systems, Inc. Accumulator oil filter/orifice having an extended tube
US6389842B1 (en) 2001-01-23 2002-05-21 Delphi Technologies, Inc. Accumulator-dehydrator assembly with anti-bump expansion chamber “J”-tube
FR2941890B1 (en) * 2009-02-09 2011-09-09 Valeo Systemes Thermiques STORAGE DEVICE HAVING A MEANS FOR TURBULENCE.

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