CN104114962B - Heat pump - Google Patents
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- Publication number
- CN104114962B CN104114962B CN201280062075.1A CN201280062075A CN104114962B CN 104114962 B CN104114962 B CN 104114962B CN 201280062075 A CN201280062075 A CN 201280062075A CN 104114962 B CN104114962 B CN 104114962B
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- compressor stage
- heat exchanger
- interface
- flow
- flowly
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- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 238000005057 refrigeration Methods 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 230000006835 compression Effects 0.000 claims abstract description 5
- 238000007906 compression Methods 0.000 claims abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims description 30
- 239000012530 fluid Substances 0.000 claims description 14
- 230000008878 coupling Effects 0.000 claims description 12
- 238000010168 coupling process Methods 0.000 claims description 12
- 238000005859 coupling reaction Methods 0.000 claims description 12
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000005191 phase separation Methods 0.000 claims description 2
- 239000006200 vaporizer Substances 0.000 description 5
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Abstract
The present invention relates to the heat pump (2) can changed between refrigeration work and heating work, have: first heat exchanger (4), one the second heat exchanger (6), two compressor stages (8 for compression one medium, 10), one connected between compressor stage (6,8) with the second compressor stage (10) is used for the intermediate pressure bottle (12) that the phase of liquid medium separates；Wherein it is connected to a switching valve (16) in the second compressor stage (8) downstream, can set up between the second compressor stage (8) with the second heat exchanger (6) in refrigeration works by this switching valve and through-flow be connected and through-flow connection can be set up between the second compressor stage (8) with the first heat exchanger (4) in heating work.
Description
Technical field
The present invention relates to the heat pump can changed between refrigeration work and heating work, this heat pump has first heat exchanger and second heat exchanger, and between these heat exchangers, energy can transmit to one or the other direction, and has a compressor set.
Background technology
The heat pump of type described in beginning is well known in prior art.This heat pump is for being sent to a second container by heat energy by first container in the case of consumed work.Generally heat pump fluid carrys out work, and this fluid is evaporated in the case of input heat when low pressure and is condensed in the case of quantity of heat given up after being compressed to high pressure again.To select in this wise for these pressure, i.e. the temperature of phase conversion has a gap being sufficiently used for heat transmission relative to the temperature of thermal source or the temperature of radiator.
Heat pump is to carry out work by a fluid circulation loop for its simplest configuration, and this closed circuit has: a vaporizer, and fluid or medium evaporate in the case of absorbing energy wherein；One connect thereafter, powered compressor, medium is compressed in the case of mechanical power applying wherein；One back to back condenser, fluid is liquefied in the case of output energy wherein；And last is connected to condenser reducer below, fluid is depressurized wherein.Reducer is connected with vaporizer again at its outlet side, thus makes closed circuit close.
In addition known convertible heat pump, two heat exchangers being provided with connect into condenser or vaporizer a little while, or in turn, connect into vaporizer and condenser a little while.
Efficiency or power factor for traditional convertible heat pump are restricted technically.It is expected that make the efficiency of heat pump or power factor be improved.
Summary of the invention
The task of the present invention is, provides the convertible heat pump with big temperature fall, and it has the higher efficiency of heat pump more convertible than known tradition or higher power factor.
According to the present invention, the heat pump that can change between refrigeration work and heating work has: one absorbs energy in working in refrigeration and exports the first heat exchanger of energy in heating work, it with treat that refrigeration or object to be heated form thermal coupling.One exports energy in working in refrigeration and absorbs the second heat exchanger of energy in heating work, and it is used as radiator or thermal source.
Being provided with first compressor stage and second compressor stage being connected to after the first compressor stage to compress fluid or medium, the latter makes the medium that have compressed in the first compressor stage compress further.Therefore can reach the higher degree of compression and big temperature fall can be realized by two stages of compression, can reach the most again higher condensation temperature.
The pressure level in the first compressor stage exit is equal to the pressure level of the second compressor stage porch in the case.
Between the first compressor stage and the second compressor stage, it is connected to an intermediate pressure bottle, occurs the phase of liquid medium to separate and the deposition of liquid medium wherein.In intermediate pressure bottle rise, be connected to the most at its upstream in the second compressor stage after middle pressure bottle be compressed further and overheated by the first precompressed hot gas of compressor stage.
It is proposed according to the present invention to, second compressor stage is connected to a switching valve in downstream, can set up by this switching valve and through-flow be connected and can set up through-flow connection between the second compressor stage with the first heat exchanger in heating work in refrigeration works between the second compressor stage with the second heat exchanger.Can reach in this way: depending on required working method, heat exchanger can carry out work as vaporizer or as condenser.
The hot conveyer of an inside can be provided with according to a first possible configuration, it first-class is taken out by intermediate pressure bottle and is connected to before the first compressor stage and its second is by taking out before compressor and being connected between after a fluid output port of pressure bottle, so that energy is sent to the gas flowing to the first compressor stage by the liquid medium that separate in intermediate pressure bottle and by intermediate pressure bottle fluid output port exports.Can reach the additional superheat of medium to be compressed in this way.
Another possible configuration according to the present invention can be arranged: a switching valve has four interfaces, wherein first interface and the first compressor stage connect through-flowly, second interface and the first heat exchanger connect through-flowly, the 3rd interface and the first compressor stage or if provided, with if through-flow with hot conveyer be connected and the 4th interface and the second heat exchanger through-flow connect.
Connection is set in the range of this configuration in this wise: in refrigeration works the second compressor stage be connected through-flowly with the second heat exchanger and the first heat exchanger and the first compressor stage or if provided, with if through-flow with hot conveyer be connected, and the second compressor stage is connected and the second heat exchanger and the first compressor stage or through-flow with hot conveyer be connected through-flowly with the first heat exchanger in heating work.The most intensively reach the conversion between heating work and refrigeration work.
Another possible configuration according to the present invention can arrange a conversion equipment, this conversion equipment makes to guide the coupling part between the first compressor stage and intermediate pressure bottle from the first heat exchanger or from the second heat exchanger the medium that is decompressed on an intermediate pressure by an expansion valve being connected to after heat exchanger, so that by the first precompressed medium of compressor stage and from corresponding hiigh pressure stage, the medium that is depressurized on intermediate pressure be mutually mixed and flow to intermediate pressure bottle, the most and then occur the phase of medium to separate.
Another possible configuration according to the present invention can be arranged: conversion equipment has four interfaces, wherein first interface by the first expansion valve and the first heat exchanger through-flow connect, second interface by the second expansion valve and the second heat exchanger through-flow connect, the 3rd interface is through-flow with hot conveyer is connected and the 4th interface is connected through-flowly with the coupling part between the first compressor stage with intermediate pressure bottle.
By this conversion equipment refrigeration work in the second heat exchanger by the second expansion valve through-flow with the coupling part between the first compressor stage with intermediate pressure bottle be connected and internal hot conveyer by the first expansion valve and the first heat exchanger through-flow connect.Wherein in heating work the first heat exchanger by the first expansion valve through-flow with the coupling part between the first compressor stage with intermediate pressure bottle be connected and internal hot conveyer by the second expansion valve and the second heat exchanger through-flow connect.The conversion carrying out between refrigeration work and heating work can be gathered on the three unities in this way, this reduce the expense of locus and reduce component cost.
Another possible configuration according to the present invention can be arranged: the first compressor stage and the second compressor stage are disposed in a common compressor.Two compressor stages the most such as can be disposed on a common axle, is wherein exported in intermediate pressure bottle by the first precompressed medium of compressor stage from compressor, and medium is flowed to the second compressor stage again by this bottle.Number of components needed for can realizing a compact structure in this way and reducing.
Another possible configuration according to the present invention can be arranged: the first compressor stage and the second compressor stage are realized by a single-stage compressor with intermediate injection device.
Another possible configuration according to the present invention can be arranged: the first heat exchanger is a board-like hot conveyer and/or the second heat exchanger is a stacked hot conveyer.
Another possible configuration according to the present invention can be arranged: conversion equipment and/or switching valve are configured cross valve, and wherein in corresponding dislocation, each two interface mutually forms through-flow connection in couples.This switching valve can configuration in this wise, i.e. it has a small amount of moving component and just be enough to make corresponding switching valve the most reliable.
Another possible configuration according to the present invention can be arranged: conversion equipment is configured the structure of four one way stop peturn valves, the most each interface is connected with each two interface in this wise by each middle one way stop peturn valve connected, so that according to the pressure condition on interface, often next one way stop peturn valve is cut off and another is opened, and thus each two interface is mutual connects through-flowly.This conversion equipment the most such as can be configured to be had four correspondingly oriented one way stop peturn valves and has the conduit ring of the interface being connected to therebetween.
In the another configuration of the present invention, the entrance of the gas outlet of intermediate pressure bottle, the outlet of the first compressor stage and the second compressor stage is connected to a star convergence point, so that intermediate pressure bottle can be need not.
The switchable component arranging an active within the scope of the invention depending on form of implementation is the most enough, thus makes powered component reduce in the range of this configuration of the present invention, and this creates the impact in front to reliability, complexity and the cost of device.
Through-flow connection can be set up within the scope of the invention by pipeline, such as conduit.
Accompanying drawing explanation
Hereinafter subtract by an embodiment to describe the present invention.Its accompanying drawing represents:
Fig. 1 a: be in heating work according to a heat pump of the present invention,
Fig. 1 b: be in refrigeration work according to a heat pump of the present invention, and
Fig. 2: the detail view of the possible configuration of a conversion equipment in the scope of the invention.
Embodiment
Fig. 1 a and 1b represents that a heat pump 2 according to the present invention is in heating work (Fig. 1 a) or is in refrigeration work (Fig. 1 b).Represented by different connection types at shown piping diagram medium or the different phase of cryogen or pressure level.According to the heat pump of the present invention substantially occurs three kinds of different conditions: first cryogen or media fraction ground carries with liquid, and this is represented by solid line.In addition carrying as cold air, this connects to represent by a dotted line media fraction.Furthermore medium also carries as hot gas, this is connected by dotted line and represents.Flow direction is then represented by arrow.
Heat pump 2 according to the present invention has first heat exchanger 4, and this heat exchanger can be configured board-like hot conveyer.This first heat exchanger 4 is formed with object to be heated or to be cooled and is connected.One the second heat exchanger 6 it can be configured stacked hot conveyer and a thermal source or radiator forms thermal coupling.
The medium carried in this closed circuit recompresses by first compressor stage 8 precommpression and by second compressor stage 10.Being provided with an intermediate pressure bottle 12 between first compressor stage 8 and the second compressor stage 10 again, this intermediate pressure bottle medium to being imported by input 12.1 carries out phase separation.The medium being in liquid will be derived by outfan 12.2, be in the medium of gaseous state and rise and pass through the outfan 12.3 of intermediate pressure bottle 12 in intermediate pressure bottle and siphoned away by the second compressor stage 10.
The liquid medium derived by intermediate pressure bottle 12 is derived by first-class 14.1 by a hot conveyer 14, and here it delivers heat to be in medium in second 14.2, that aspirated by the first compressor stage 8.
Being provided with a switching valve 16 in the downstream of the second compressor stage 10, here this switching valve is configured cross valve.Switching valve 16 with its first interface 16.1 through-flow with the second compressor stage 10 be connected, with its second interface 16.2 through-flow with the first heat exchanger 4 be connected, with its 3rd interface 16.3 through-flow with hot conveyer 14 be connected and with its 4th interface 16.4 through-flow with the second heat exchanger 6 be connected.
First heat exchanger 4 and the second heat exchanger 6 form the most through-flow connection at opposite side and a conversion equipment 18.First expansion valve 20 it is provided with between the first heat exchanger 4 and conversion equipment 18.Second expansion valve 22 it is provided with between the second heat exchanger 6 and conversion equipment 18.Set up with the through-flow first interface 18.1 that connects through of the first expansion valve 20.Through-flow second interface 18.2 that connects through between the second expansion valve 22 and conversion equipment 18 is set up.3rd interface 18.3 is through-flow with the first-class formation of hot conveyer 14 to be connected.4th interface 18.4 of conversion equipment 18 is connected with an interface 24 of a coupling part 26 between the outfan 8.2 and the input 12.1 of intermediate pressure bottle 12 of the first compressor stage 8.
In the heating work shown in Fig. 1 a, switching valve 16 is changed in this wise, through-flow be connected so that setting up between the second compressor stage 10 with the first heat exchanger 4 and simultaneously set up through-flow connection by hot conveyer 14 between the second heat exchanger 6 with the first compressor stage 8.Thus carrying heat exchanger 4 by the second warmed-up hot gas of compressor stage 10, hot gas by the output of its heat and leaves first heat exchanger 4 with liquid here by condensation.Liquid medium is placed on middle pressure by expansion valve 20 and is evaporated.Conversion equipment 18 is changed in this wise in the case, so that it makes interface 18.1 be connected with each other with 18.4, thus makes the gas being depressurized on middle pressure flow to the interface 24 between the first compressor stage 8 and intermediate pressure bottle 12.
In heating work, in low-pressure side, outfan and second heat exchanger 6 of hot conveyer 14 forms through-flow connection, and the latter with hot conveyer 14 and then forms through-flow connection with the first compressor stage 8 by switching valve 16 and the most interconnective interface 16.4 and 16.3.Hot conveyer 14 is mutually connected by the interconnective interface 18.3 and 18.2 of conversion equipment 18 with the second expansion valve 22 being connected to before the second heat exchanger 6.
Therefore it is connected with each other with 18.4 with the interface 18.1 of 16.2 and conversion equipment 18 at the interface 16.1 of high-pressure side switching valve 16 in heating work.It is connected with each other with 18.3 with the interface 18.2 of 16.4 and conversion equipment 18 at the interface 16.3 of low-pressure side switching valve 16.
Through-flow it be connected and through-flow be connected low-pressure side interface 16.2 is mutual with 16.3 the interface 16.1 of high-pressure side switching valve 16 is mutual with 16.4 in the refrigeration shown in Fig. 1 b works.Therefore the second compressor stage 10 is coupled with the second heat exchanger 6 by switching valve 16.
First heat exchanger 4 forms through-flow connection by the switching valve 16 input 8.1 with hot conveyer 14 and with the first compressor stage 8 subsequently.Make interface 18.2 be connected with 18.4 at high-pressure side conversion equipment 18 in the case and thus make the second heat exchanger 6 be connected by the interface 24 of expansion valve 22 with the coupling part 26 between the first compressor stage 8 and intermediate pressure bottle 12.
Therefore multiple compressor stages of the intermediate pressure bottle 12 with middle connection can be used according to the heat pump 2 of the present invention, because this intermediate pressure bottle 12 is the most through-flow in two transition statuses.Employing a hot conveyer 14 with setting up the most in this way makes the refrigerant gas sucked by the first compressor stage overheated.Can additionally make compressor stage 8 in this way, the refrigerant gas in 10 is overheated.
Fig. 2 represents a possible configuration of the conversion equipment 18 according to the present invention.
Being provided with four one way stop peturn valves 18.5 to 18.8 in conversion equipment 18, each valve has a cut-off direction and a conducting direction.Interface 18.1 to 18.4 is connected on a conduit ring 18.9, wherein it is respectively provided with an one way stop peturn valve 18.5 to 18.8 between each two interface in 18.1 to 18.4, wherein each of these valves is connected in this wise, so that only can carrying out in the same direction as from the fluid stream of each interface 18.1 to 18.4 and the most only always can being carried out by a direction, the most always the opposing party towards the fluid stream of corresponding interface 18.1 to 18.4.Depending on pressure condition, each two interface can be connected with each other in this way.
Reference numerals list
2 heat pumps
4 first heat exchangers
6 second heat exchangers
8 first compressor stages
The input of 8.1 first compressor stages
The outfan of 8.2 first compressor stages
10 second compressor stages
12 intermediate pressure bottles
The input of 12.1 intermediate pressure bottles
The fluid output port of 12.2 intermediate pressure bottles
The gas output end of 12.3 intermediate pressure bottles
Hot conveyer within 14
14.1 hot conveyers first-class
The second of 14.2 hot conveyers
16 switching valves
The interface of 16.1-16.4 switching valve
18 conversion equipments
The interface of 18.1-18.4 conversion equipment
18.5-18.8 one way stop peturn valve
18.9 conduit ring
20 first expansion valves
22 second expansion valves
24 connecting tubes
26 interfaces
Claims (9)
1. the heat pump can changed between refrigeration work and heating work, has:
One the first heat exchanger (4), absorbs energy in refrigeration and in heating work in working
Middle output energy；
One the second heat exchanger (6), exports energy in refrigeration and in working in heating work
Absorb energy；
One the first compressor stage (8), for compression one medium；
One the second compressor stage (10) being connected to the first compressor stage (8) below；
Wherein, the pressure level in the first compressor stage (8) exit is equal to the second compressor stage (10)
The pressure level of porch；
Wherein, a switching valve (16) it is connected in the second compressor stage (10) downstream, by this
Switching valve can be between the second compressor stage (10) and the second heat exchanger (6) in refrigeration works
Set up through-flow connection and can be at the second compressor stage (10) and the first heat exchanger in heating work
(4) through-flow connection is set up between；
Being provided with a conversion equipment (18), this conversion equipment makes the first heat exchanger (4) or the second heat
Exchanger (6) respectively guides the first compressor stage (8) with middle by a middle expansion valve connected
Coupling part (24) between pressure bottle (12)；
Conversion equipment has four interfaces (18.1,18.2,18.3,18.4), wherein, first interface
(18.1) by the first expansion valve (20) through-flow with the first heat exchanger (4) be connected, second connects
Mouthful (18.2) by the second expansion valve (22) through-flow with the second heat exchanger (6) be connected, the 3rd
Interface (18.3) conveyer hot with inside (14) be connected through-flowly and the 4th interface (18.4) with
Coupling part (24) between the first compressor stage (8) and intermediate pressure bottle (12) is through-flowly even
Connect, wherein
In refrigeration works, the second heat exchanger (6) is by the second expansion valve (22) and first
Coupling part (24) between compressor stage (8) with intermediate pressure bottle (12) be connected through-flowly and
Internal hot conveyer (14) is by the first expansion valve (20) and the first heat exchanger (4) through-flow ground company
Connect, and
In heating work, the first heat exchanger (4) is by the first expansion valve (20) and first
Coupling part (24) between compressor stage (8) with intermediate pressure bottle (12) be connected through-flowly and
Internal hot conveyer (14) is by the second expansion valve (22) and the second heat exchanger (6) through-flow ground company
Connect；
Wherein, intermediate pressure bottle (12) is connected to the first compressor stage (8) and the second compressor stage (10)
Between, it is the phase separation for liquid medium.
Heat pump the most according to claim 1, it is characterised in that: under internal hot conveyer (14) has
State feature, its first-class (14.1) be connected to before the first compressor stage (8) and it
Second-rate (14.2) are connected between after a fluid output port (12.2) of pressure bottle (12),
So that liquid that is that separate in intermediate pressure bottle (12) and that exported by fluid output port (12.2)
Energy is sent to the gaseous medium flowing to the first compressor stage (8) by medium.
Heat pump the most according to claim 1, it is characterised in that: be provided with one have four interfaces (16.1,
16.2,16.3,16.4) switching valve (16), wherein, first interface (16.1) and the second compression
Machine level (10) connects through-flowly, and the second interface (16.2) and the first heat exchanger (4) are through-flowly even
Connecing, the 3rd interface (16.3) is through-flow with the first compressor stage (8) or conveyer hot with inside (14)
Ground connects and the 4th interface (16.4) is connected, wherein through-flowly with the second heat exchanger (6)
In refrigeration works, the second compressor stage (10) is connected through-flowly with the second heat exchanger (6)
And first heat exchanger (4) through-flow with the first compressor stage (8) or conveyer hot with inside (14)
Ground connects, and
In heating work, the second compressor stage (10) is connected through-flowly with the first heat exchanger (4)
And second heat exchanger (6) through-flow with the first compressor stage (8) or conveyer hot with inside (14)
Ground connects.
Heat pump the most as claimed in one of claims 1-3, it is characterised in that: the first compressor stage (8)
And second compressor stage (10) be disposed in a common compressor.
5. according to the heat pump any one of claims 1 to 3, it is characterised in that: the first compressor stage
And the second compressor stage (10) is come real by a single-stage compressor with intermediate injection device (8)
Existing.
6. according to the heat pump any one of claims 1 to 3, it is characterised in that: the first heat exchanger
(4) it is a board-like hot conveyer and/or the second heat exchanger (6) is a stacked hot conveyer.
7. according to the heat pump any one of claims 1 to 3, it is characterised in that: conversion equipment (18)
And/or switching valve (16) is configured cross valve, wherein each two interface in corresponding dislocation
(16.1,16.2,16.3,16.4,18.1,18.2,18.3,18.4) mutually form in couples
Through-flow connection.
8. according to the heat pump any one of claims 1 to 3, it is characterised in that: conversion equipment (18)
It is configured the structure of four one way stop peturn valves (18.5,18.6,18.7,18.8), the most each connects
Mouthful (18.1,18.2,18.3,18.4) by the one way stop peturn valve that connects in the middle of each one (18.5,
18.6,18.7,18.8) in this wise with each two interface (18.1,18.2,18.3,18.4) even
Connect, so that according to next list every of the pressure condition on interface (18.1,18.2,18.3,18.4)
It is cut off to check-valves (18.5,18.6,18.7,18.8) and another is opened, the most every two
Individual interface (18.1,18.2,18.3,18.4) is mutual to be connected through-flowly.
9. according to the heat pump any one of claims 1 to 3, it is characterised in that: intermediate pressure bottle (12)
Gas outlet, the outlet (8.2) of the first compressor stage (8) and the second compressor stage (10)
Entrance is connected to a star convergence point.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011121859.2 | 2011-12-21 | ||
| DE102011121859A DE102011121859B4 (en) | 2011-12-21 | 2011-12-21 | Heat pump with two-stage compressor and device for switching between heating and cooling operation |
| PCT/EP2012/076365 WO2013092849A1 (en) | 2011-12-21 | 2012-12-20 | Heat pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104114962A CN104114962A (en) | 2014-10-22 |
| CN104114962B true CN104114962B (en) | 2016-11-30 |
Family
ID=
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02225953A (en) * | 1988-12-23 | 1990-09-07 | General Electric Co <Ge> | Freezing system with double vaporizer for domestic refrigerator |
| JP2003074999A (en) * | 2001-08-31 | 2003-03-12 | Daikin Ind Ltd | Refrigerating machine |
| JP2005214444A (en) * | 2004-01-27 | 2005-08-11 | Sanyo Electric Co Ltd | Refrigerator |
| CN1793755A (en) * | 2004-12-22 | 2006-06-28 | 日立家用电器公司 | Refrigeration device and air conditioner using it |
| CN101410677A (en) * | 2006-03-27 | 2009-04-15 | 大金工业株式会社 | Refrigeration system |
| CN101473173A (en) * | 2006-06-21 | 2009-07-01 | 大金工业株式会社 | Refrigeration device |
| CN102016449A (en) * | 2008-05-02 | 2011-04-13 | 大金工业株式会社 | Refrigeration unit |
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02225953A (en) * | 1988-12-23 | 1990-09-07 | General Electric Co <Ge> | Freezing system with double vaporizer for domestic refrigerator |
| JP2003074999A (en) * | 2001-08-31 | 2003-03-12 | Daikin Ind Ltd | Refrigerating machine |
| JP2005214444A (en) * | 2004-01-27 | 2005-08-11 | Sanyo Electric Co Ltd | Refrigerator |
| CN1793755A (en) * | 2004-12-22 | 2006-06-28 | 日立家用电器公司 | Refrigeration device and air conditioner using it |
| CN101410677A (en) * | 2006-03-27 | 2009-04-15 | 大金工业株式会社 | Refrigeration system |
| CN101473173A (en) * | 2006-06-21 | 2009-07-01 | 大金工业株式会社 | Refrigeration device |
| CN102016449A (en) * | 2008-05-02 | 2011-04-13 | 大金工业株式会社 | Refrigeration unit |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161130 Termination date: 20191220 |