CN202581967U - Refrigerant heating device and air conditioner - Google Patents
Refrigerant heating device and air conditioner Download PDFInfo
- Publication number
- CN202581967U CN202581967U CN2012201673768U CN201220167376U CN202581967U CN 202581967 U CN202581967 U CN 202581967U CN 2012201673768 U CN2012201673768 U CN 2012201673768U CN 201220167376 U CN201220167376 U CN 201220167376U CN 202581967 U CN202581967 U CN 202581967U
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- Prior art keywords
- refrigerant
- electric heating
- heating device
- heating tube
- shell
- 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.)
- Expired - Fee Related
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 130
- 238000010438 heat treatment Methods 0.000 title claims abstract description 71
- 238000005485 electric heating Methods 0.000 claims abstract description 85
- 238000003466 welding Methods 0.000 claims description 6
- 241000791841 Alectis ciliaris Species 0.000 claims description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- 230000003416 augmentation Effects 0.000 claims description 2
- 229910010293 ceramic material Inorganic materials 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 239000011810 insulating material Substances 0.000 claims 2
- 230000000694 effects Effects 0.000 description 8
- 238000005057 refrigeration Methods 0.000 description 8
- 238000004378 air conditioning Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 239000012774 insulation material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000003763 carbonization Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- 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
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The utility model provides a refrigerant heating device and air conditioner easily makes the processing, and reliable performance obtains guaranteeing, strengthens the heat convection coefficient of refrigerant heating device and refrigerant, and the heat transfer is effectual. Refrigerant heating apparatus, comprising: the shell, the electric heating pipe and the refrigerant inlet pipeline; the shell is provided with a refrigerant inlet, a refrigerant outlet and an electric heating pipe mounting port; the electric heating pipe extends into the inner cavity of the shell through the electric heating pipe mounting port, and the power terminal of the electric heating pipe is positioned outside the shell; the refrigerant inlet pipeline is connected with the shell at a refrigerant inlet; the center line of the joint of the refrigerant inlet pipeline and the shell is intersected with the center line of the electric heating pipe to form an included angle, and the included angle is within the range of A: a is more than or equal to 60 degrees and less than or equal to 90 degrees. The air conditioner comprises a compressor, a condenser, an evaporator, a throttling device, a refrigerant circulating pipeline and the refrigerant heating device, wherein a refrigerant inlet pipeline and a refrigerant outlet of the refrigerant heating device are respectively connected with the refrigerant circulating pipeline.
Description
Technical field
The utility model relates to the air regulator technical field, particularly relates to a kind of heating device for refrigerant and air-conditioner.
Background technology
Air-conditioning refrigeration system mainly is made up of compressor, condenser, evaporimeter and four basic elements of character of throttling arrangement.Connect successively with pipeline between them, form an airtight system, cold-producing medium constantly circulates in system, carries out exchange heat and generating change of state with the external world.
Usually, compressor is delivered to the liquid refrigerant that becomes normal temperature high voltage after condenser (off-premises station) dispels the heat then with the gaseous refrigerant of the cold-producing medium boil down to HTHP of gaseous state, and off-premises station blows out hot blast; Cold-producing medium gets into evaporimeter (indoor set) through throttling arrangement then, increases suddenly because cold-producing medium arrives the evaporimeter rear space from throttling arrangement; Pressure reduces, and liquid cold-producing medium will be vaporized, and becomes the gaseous state refrigerant of low temperature; Thereby the absorption great amount of heat, evaporimeter will turn cold, and the fan of indoor set is blown over indoor air from evaporimeter; Carry out heat exchange with evaporimeter, indoor set blows out cold wind; The cold-producing medium of gaseous state is got back to compressor continuation compression, circulation constantly then.
In air-conditioning refrigeration system, when being under the cryogenic conditions operation, a little less than the refrigeration system evaporation and heat-exchange ability; Cold-producing medium can't evaporate fully, can not absorb enough heats, causes the air-conditioning weak effect; Evaporating heat exchanger frosting or freeze; Compressor air suction degree of superheat deficiency causes Wet Compression---and the compressor Wet Compression is meant that the compressor suction cold-producing medium is not the cold-producing medium of superheated, has the cold-producing medium of operative liquid, has liquid refrigerant in the cold-producing medium that compressor sucks.Because liquid refrigerant can't compress,, will cause the compressor compresses chamber to receive severe impact and cause compressor damage, air-conditioning effect and reliability all to be difficult to assurance if Wet Compression appears in compressor.
Solution is that cold-producing medium is carried out local heat.Existing cold-producing medium heating means; Make processed complex; Difficulty, and uncontrollable heater surface temperature under refrigerant condition (like flow, the temperature etc.) abnormal conditions cause the heater surface temperature to surpass the scope of application; Even causing harmful phenomenons such as heating working medium generation cracking carbonization is rotten, reliability can't guarantee.
Summary of the invention
The purpose of the utility model is to provide a kind of heating device for refrigerant and air-conditioner, is easy to make processing, and unfailing performance is guaranteed, and strengthens the convection transfer rate of heating device for refrigerant and cold-producing medium, good effect of heat exchange.
The utility model is realized through following technical scheme:
Heating device for refrigerant includes: shell, electric heating tube and refrigerant inlet pipeline; Said shell is provided with refrigerant inlet and refrigerant outlet; Said electric heating tube is installed in the said shell inner cavity; Said refrigerant inlet pipeline is communicated with at the refrigerant inlet place with said shell; Wherein, the center line of refrigerant inlet pipeline and shell junction pipeline section and the center line of electric heating tube intersect and are angle, angle angle A scope: 60 °≤A≤90 °.
In a preferred embodiment, ratio≤1.2 of internal diameter of outer cover size and electric heating tube outside dimension.
Air-conditioner comprises compressor, condenser, evaporimeter, throttling arrangement and refrigerant circulation line, and refrigerant circulation line connects compressor, condenser, evaporimeter and throttling arrangement and forms airtight refrigerant-cycle systems; Wherein, also comprise above-mentioned heating device for refrigerant, the refrigerant inlet pipeline of said heating device for refrigerant is connected with refrigerant circulation line respectively with refrigerant outlet.
In a preferred embodiment, said heating device for refrigerant is connected with the air entry pipeline of compressor.
The beneficial effect of the utility model is following:
The heating device for refrigerant of the utility model adopts electrically heated method to heat to cold-producing medium, promotes the cold-producing medium energy state, makes cold-producing medium absorb enough heats.Because heating device for refrigerant includes shell, electric heating tube and refrigerant inlet pipeline, the center line of refrigerant inlet pipeline and shell linkage section and the center line of electric heating tube intersect and are angle, angle angle A scope: 60 °≤A≤90 °.Cold-producing medium is arranged in the flows outside of shell inner cavity, electric heating tube, and the turbulence level when having increased refrigerant inlet strengthens convection transfer rate, with the electric heating tube good effect of heat exchange.The heating device for refrigerant of the utility model is easy to make processing simultaneously, and unfailing performance is guaranteed.The air-conditioner of the utility model, owing to comprise heating device for refrigerant, the refrigerant inlet pipeline of said heating device for refrigerant is connected with refrigerant circulation line respectively with refrigerant outlet; Therefore, in refrigeration system, when cryogenic conditions moves down, adopt electrically heated method to heat to cold-producing medium; Promote energy state, make cold-producing medium absorb enough heats, avoided a little less than the refrigeration system evaporation and heat-exchange ability; Cold-producing medium can't evaporate fully, can not absorb enough heats, causes the air-conditioning weak effect; Evaporating heat exchanger frosting or freeze, compressor air suction degree of superheat deficiency causes Wet Compression, and the situation that air-conditioning effect and reliability all are difficult to guarantee takes place.
Description of drawings
Fig. 1 is the perspective view of the heating device for refrigerant of the utility model;
Fig. 2 is the sectional structure sketch map of the heating device for refrigerant of the utility model;
Fig. 3 is the hot end and the cold conditions end position structural representation of the heating device for refrigerant of the utility model;
Fig. 4 is the sectional structure sketch map of another embodiment of heating device for refrigerant of the utility model.
Description of reference numerals:
100, heating device for refrigerant, 101, the refrigerant inlet pipeline, 102, the electric heating tube power supply terminal, 103, electric heating tube; 104, temperature limiter, 105, thermal cut-off, 106, refrigerant outlet; 107, shell, 108, rib structure, 109, middle butt welding syndeton; 110, cold conditions end, 111, the electric heating tube installing port, 120, hot end.
The specific embodiment
In order to solve prior art problems, to shown in Figure 3, the utility model provides a kind of heating device for refrigerant 100 like Fig. 1, include: shell 107, electric heating tube 103 and refrigerant inlet pipeline 101; Said shell 107 is provided with refrigerant inlet, refrigerant outlet 106 and electric heating tube installing port 111; Said electric heating tube 103 puts in shell 107 inner chambers through electric heating tube installing port 111, and electric heating tube power supply terminal 102 is positioned at shell 107 outsides; Refrigerant inlet pipeline 101 is connected at the refrigerant inlet place with shell 107; Wherein, refrigerant inlet pipeline 101 and the center line of shell junction pipeline section and the crossing angle, angle angle A scope of being of center line of electric heating tube: 60 °≤A≤90 °.
Importer through the control cold-producing medium to, make the cold-producing medium inflow direction become the bigger angle of shock, the turbulence level of increase cold-producing medium and heat exchanger tube, enhancing convection transfer rate with the direction of electric heating tube.
Preferably, ratio≤1.2 of shell 107 internal diameter sizes and electric heating tube 103 outside dimensions.Therefore, through reducing the gap of cryogen vessel and electric heating tube, control cold-producing medium actual internal area promotes the cold-producing medium flow velocity as far as possible, thereby promotes the convection transfer rate of the cold-producing medium and the area of heating surface.
In order to promote the heat flow density on electric heating tube 103 surfaces, reduce electric heating tube 103 surface temperatures, guarantee safety and reliability, electric heating tube 103 outer surfaces adopt rib structure 108 augmentation of heat transfers.
Said rib structure 108 is screw thread fin or annular fin or strip rib structure.
In order to control the temperature on calandria surface, the maximum permissible temperature of control heating is at electric heating tube 103 inner temperature limiter 104 and the thermal cut-ofves 105 of embedding.When the electric heating tube temperature reaches the capping target temperature, (be set at 120 ℃ such as temperature upper limit), temperature limiter 104 is cut off the electricity supply automatically, and when the electric heating tube temperature is lower than upper limit target temperature to a certain degree the time, temperature limiter recloses power supply; Surpass the capping target to a certain degree the time in temperature, thermal cut-off 105 fusing are cut off the electricity supply, and are after fuse 105 fusing, irrecoverable.
Preferably, temperature limiter 104 is placed on the high relatively position of electric heater for heating temperature with thermal cut-off 105, such as the interlude position that is placed on electric heating tube 103 bringing-up sections.
In refrigeration system, cold-producing medium generally mixes with compressor lubricant oil, in refrigeration pipe system, flows, and cold-producing medium that has and compressor lubricant oil can divide cracking rotten under hot conditions, even carbonization, safety problem occurs, destroy the normal operation of refrigeration system.Need control the surface temperature of heating device for refrigerant 100, when temperature is higher than certain value, must cut off the electricity supply stops heating for this reason, and under the very high situation of temperature, thermal cut-off fusing is guaranteed to cut off the electricity supply reliably, plays the effect of duplicate protection.
In order to let the electric heating tube 103 that is provided with rib structure 108 be placed in the inner chamber of shell 107; The mode of blocking in the middle of shell 107 adopts; Butt welding syndeton 109 connects in the middle of adopting, and installs behind the electric heating tube 103 again with blocking the position to welded together in the middle of the shell 107.
In order to guarantee the uniformity of electric heating tube 103 heat exchange, need guarantee the central axes of electric heating tube 103 and shell 107 as far as possible.
Preferably, the central axes of the central axis of electric heating tube 103 and shell 107.
Further; When not being full of shell 107 inner chambers at cold-producing medium; Also can be fully to the cold-producing medium heating; The central axis that electric heating tube 103 is arranged on shell 107 is the position on the lower side, and promptly electric heating tube 103 and the gap on shell 107 inner surface tops are greater than the gap of electric heating tube 103 with shell 107 inner surface bottoms.Be provided with like this, even cold-producing medium multiple aggregation under the gravity effect flows in the inner chamber middle and lower part, also can with the good contact heat-exchanging of electric heating tube.
Further; If cold-producing medium is a gaseous state; It accumulates in the top of shell 107 inner chambers more easily, so, for abundant contact heat-exchanging; Electric heating tube 103 is arranged on shell 107 central axis position on the upper side, and promptly the gap on electric heating tube 103 and shell 107 inner surface tops is less than the gap of electric heating tube 103 with shell 107 inner surface bottoms.
In order to guarantee that heat waste does not appear in electric heating body; Improve the efficiency of heating surface and heat utilization ratio; And guarantee that as far as possible the heat flow density that heats is even relatively; Electric heating tube 103 is divided into hot end 120 and cold conditions end 110, and cold conditions end 110 is the position between electric heating tube power supply terminal 102 and the refrigerant inlet, and hot end 120 is the position between refrigerant inlet and the refrigerant outlet 106; The body of electric heating tube 103 is inner, and only hot end 120 is provided with electro-heat equipment, and electro-heat equipment can be electrical heating wire.
Further, the body of electric heating tube 103 is inner, is set to the good high-temperature insulation material of heat conductivility between the electrical heating wire of hot end 120 and the body.
Said high-temperature insulation material, as: high temperature oxidation resisting magnesium.
The body of electric heating tube 103 is inner, and cold conditions end 110 is filled with the relatively poor high-temperature insulation material of heat conductivility, as: ceramic material.
The position of electric heating tube 103 before the refrigerant inlet is cold conditions end 110, and electric heating tube is the section of heating not; Position after refrigerant inlet is hot end 120, and electric heating tube is the heating section.Cold-producing medium flows into heating device for refrigerant 100 inside by refrigerant inlet, is flowed out by refrigerant outlet 106.Absorb the heat that electric heating tube discharges during cold-producing medium process electric heating tube, thus can state in promoting.
The utility model also discloses a kind of air-conditioner, comprises compressor, condenser, evaporimeter, throttling arrangement and refrigerant circulation line, and refrigerant circulation line connects compressor, condenser, evaporimeter and throttling arrangement and forms airtight refrigerant-cycle systems; Wherein, also comprise above-mentioned heating device for refrigerant 100, the refrigerant inlet pipeline of said heating device for refrigerant is connected with refrigerant circulation line respectively with refrigerant outlet.
In a preferred embodiment, said heating device for refrigerant is connected on the air entry pipeline of compressor.
The utility model heating device for refrigerant 100; When being used for air-conditioning system; Heating device for refrigerant is installed in compressor air suction mouth one end, and the cold-producing medium of heating is mainly gaseous refrigerant, so be preferably the central axes of the central axis and the shell 107 of electric heating tube 103.
Another embodiment of the heating device for refrigerant of the utility model, as shown in Figure 4.In the present embodiment, in order to promote the heat flow density on calandria surface, reduce the calandria surface temperature, guarantee safety and reliability, the cross section of electric heating tube 103 is circular or oval.
Be placed in the shell 107 for the ease of electric heating tube 103, electric heating tube 103 is positioned at electric heating tube installing port 111 positions with shell 107 welding positions, and the cross section of electric heating tube installing port 111 is circular.
Be illustrated in figure 4 as another embodiment of the utility model, itself and above-mentioned instance difference are: electric heating tube 103 surfaces are not provided with rib structure, the mode of blocking in the middle of yet need not to adopt, the connected mode that butt welding syndeton 109 connects in the middle of adopting.This embodiment is applicable to the occasion that the refrigerant heating requirements is not high, can suitably heat refrigerant, has saved material again, has made things convenient for processing.
The above embodiment has only expressed several kinds of embodiments of the utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to the protection domain of the utility model.Therefore, the protection domain of the utility model patent should be as the criterion with accompanying claims.
Claims (19)
1. heating device for refrigerant includes: shell, electric heating tube and refrigerant inlet pipeline; Said shell is provided with refrigerant inlet and refrigerant outlet; Said electric heating tube is installed in the said shell inner cavity; Said refrigerant inlet pipeline is communicated with at the refrigerant inlet place with said shell; It is characterized in that the center line of refrigerant inlet pipeline and shell junction pipeline section and the center line of electric heating tube intersect and be angle, angle angle A scope: 60 °≤A≤90 °.
2. heating device for refrigerant according to claim 1 is characterized in that, ratio≤1.2 of said internal diameter of outer cover size and electric heating tube outside dimension.
3. heating device for refrigerant according to claim 1 is characterized in that, said electric heating tube outer surface adopts the rib structure augmentation of heat transfer.
4. heating device for refrigerant according to claim 3 is characterized in that, said rib structure is screw thread fin or annular fin or strip rib structure.
5. according to any one described heating device for refrigerant in the claim 1 to 4, it is characterized in that, at inner temperature limiter and the thermal cut-off of embedding of said electric heating tube.
6. heating device for refrigerant according to claim 5 is characterized in that, said temperature limiter and thermal cut-off are placed on the interlude position of electric heating tube heating section.
7. according to claim 3 or 4 described heating device for refrigerant, it is characterized in that, the mode that said shell blocks in the middle of adopting, the butt welding syndeton connects in the middle of adopting.
8. according to any one described heating device for refrigerant in the claim 1 to 4, it is characterized in that the central axes of said electric heating tube and said shell perhaps is arranged on the shell central axis on the lower side or shell central axis position on the upper side.
9. according to any one described heating device for refrigerant in the claim 1 to 4; It is characterized in that; Said electric heating tube is arranged on the middle and lower part of the inner chamber of shell, and promptly the gap on electric heating tube and inner surface of outer cover top is greater than the gap of electric heating tube and inner surface of outer cover bottom.
10. according to any one described heating device for refrigerant in the claim 1 to 4; It is characterized in that; Said electric heating tube is divided into hot end and cold conditions end; The cold conditions end is the position between electric heating tube power supply terminal and the refrigerant inlet, and hot end is the position between refrigerant inlet and the refrigerant outlet; The body of electric heating tube is inner, and only hot end is provided with electro-heat equipment.
11. heating device for refrigerant according to claim 10 is characterized in that, the body of said electric heating tube is inner, between the electrical heating wire of hot end and the body insulating materials is set.
12. heating device for refrigerant according to claim 11 is characterized in that, the body of said electric heating tube is inner, and high temperature oxidation resisting magnesium is set between the electrical heating wire of hot end and the body.
13., it is characterized in that the body of said electric heating tube is inner according to claim 11 or 12 described heating device for refrigerant, the cold conditions end is filled with insulating materials.
14. heating device for refrigerant according to claim 13 is characterized in that, the body of said electric heating tube is inner, and the cold conditions end is filled with ceramic material.
15., it is characterized in that the cross section of said electric heating tube is circular or oval according to any one described heating device for refrigerant in the claim 1 to 4.
16. heating device for refrigerant according to claim 15 is characterized in that, said electric heating tube and shell welding position are positioned at electric heating tube installing port position, and the cross section of electric heating tube installing port is circular.
17. air-conditioner comprises compressor, condenser, evaporimeter, throttling arrangement and refrigerant circulation line, refrigerant circulation line connects compressor, condenser, evaporimeter and throttling arrangement and forms airtight refrigerant-cycle systems; Wherein, comprise that also the refrigerant inlet pipeline of said heating device for refrigerant is connected with refrigerant circulation line respectively with refrigerant outlet like any one described heating device for refrigerant in the claim 1 to 4.
18. air-conditioner comprises compressor, condenser, evaporimeter, throttling arrangement and refrigerant circulation line, refrigerant circulation line connects compressor, condenser, evaporimeter and throttling arrangement and forms airtight refrigerant-cycle systems; Wherein, also comprise heating device for refrigerant as claimed in claim 10, the refrigerant inlet pipeline of said heating device for refrigerant is connected with refrigerant circulation line respectively with refrigerant outlet.
19. air-conditioner according to claim 17 is characterized in that, said heating device for refrigerant is connected on the air entry pipeline of compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201673768U CN202581967U (en) | 2012-04-18 | 2012-04-18 | Refrigerant heating device and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201673768U CN202581967U (en) | 2012-04-18 | 2012-04-18 | Refrigerant heating device and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202581967U true CN202581967U (en) | 2012-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201673768U Expired - Fee Related CN202581967U (en) | 2012-04-18 | 2012-04-18 | Refrigerant heating device and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202581967U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103112911A (en) * | 2013-02-06 | 2013-05-22 | 中国人民解放军后勤工程学院 | Multi-stage tubular seawater desalting device with preheating function |
| CN103375947A (en) * | 2012-04-18 | 2013-10-30 | 珠海格力电器股份有限公司 | refrigerant heating device and air conditioner |
-
2012
- 2012-04-18 CN CN2012201673768U patent/CN202581967U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103375947A (en) * | 2012-04-18 | 2013-10-30 | 珠海格力电器股份有限公司 | refrigerant heating device and air conditioner |
| CN103375947B (en) * | 2012-04-18 | 2015-09-30 | 珠海格力电器股份有限公司 | refrigerant heating device and air conditioner |
| CN103112911A (en) * | 2013-02-06 | 2013-05-22 | 中国人民解放军后勤工程学院 | Multi-stage tubular seawater desalting device with preheating function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20210418 |
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| CF01 | Termination of patent right due to non-payment of annual fee |