CN203893496U - Four-pipe multifunctional air-cooled cold and hot water unit - Google Patents
Four-pipe multifunctional air-cooled cold and hot water unit Download PDFInfo
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- CN203893496U CN203893496U CN201420306996.4U CN201420306996U CN203893496U CN 203893496 U CN203893496 U CN 203893496U CN 201420306996 U CN201420306996 U CN 201420306996U CN 203893496 U CN203893496 U CN 203893496U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 239000007788 liquid Substances 0.000 claims abstract description 88
- 238000001035 drying Methods 0.000 claims abstract description 30
- 238000001914 filtration Methods 0.000 claims description 29
- 230000008676 import Effects 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 11
- 238000004378 air conditioning Methods 0.000 abstract description 23
- 238000010438 heat treatment Methods 0.000 abstract description 10
- 238000005057 refrigeration Methods 0.000 abstract description 9
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000009833 condensation Methods 0.000 description 10
- 230000005494 condensation Effects 0.000 description 10
- 238000001704 evaporation Methods 0.000 description 10
- 230000008020 evaporation Effects 0.000 description 10
- 239000007789 gas Substances 0.000 description 10
- 238000010977 unit operation Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- 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]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
-
- 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
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- Magnetically Actuated Valves (AREA)
Abstract
The utility model relates to a four-pipe multifunctional air-cooled cold and hot water unit. The four-pipe multifunctional air-cooled cold and hot water unit comprises a compressor, a first four-way reversing valve, a second four-way reversing valve, a heat recoverer, an evaporator, a gas-liquid separator, a liquid storage device, a drying filter, an expansion valve, a liquid distribution body and a finned coil pipe. The four-pipe multifunctional air-cooled cold and hot water unit has the advantages that the four-pipe multifunctional air-cooled cold and hot water unit has the multiple functions of air conditioning refrigeration, air conditioning heating and refrigeration plus heat recovery and the function of a heat pump water heater, not only can achieve the air conditioning function but also can make domestic hot water, and provides a solution integrating air conditioning and water heating for usage occasions with both air conditioning requirements and water heating requirements. The four-pipe multifunctional air-cooled cold and hot water unit achieves the functions of an air conditioner and a boiler, so that investment in the boiler is omitted, and initial cost and operation and maintenance cost are reduced.
Description
Technical field
The utility model relates to air-to-water heat pump, relates in particular to a kind of four control multifunctional wind cooling cold and hot water units.
Background technology
Air-conditioning unit is the indispensable temperature control devices of building such as hotel, hotel, swimming pool.This class use occasion has refrigeration duty demand summer, has thermic load demand winter, and air-conditioning unit is long-term operation mostly, is the main equipment of power consumption in building.And meanwhile, above-mentioned building occasion has again a large amount of hot water demands.In traditional design, normally by arranging separately, boiler provides hot water.Boiler is well positioned to meet user's hot water demand, but also to user, has increased the cost of a lot of investment and operation maintenance.Especially in air-conditioning equipment and the simultaneous situation of boiler plant, maintenance management work is more complicated.
Air-conditioning unit can discharge a large amount of condensation heat in refrigeration, and in recent years, along with the development of air-conditioning technical, Condensation Heat Recovery Technology is widely used.The condenser heat that reclaims unit in refrigeration is used for producing domestic hot-water, kills two birds with one stone, and comprehensive energy efficiency improves during compared with isolated operation air-conditioning greatly.Recuperation of heat form mainly contains two kinds: a kind of is part recuperation of heat, and a part of condensation heat while reclaiming air-conditioning unit refrigeration is used for producing domestic hot-water.Another kind is full recuperation of heat, and the whole condenser heats while reclaiming air-conditioning unit refrigeration are used for producing domestic hot-water.Dan Congyong can angle say, these two kinds of modes than the progress of isolated operation air conditioner refrigerating a lot.But mostly have that recuperation of heat amount is few, hot water supply and a problem such as air-conditioning pins down mutually, function is perfect not, far can not meet the user demand in above-mentioned place comprehensively.
Part recuperation of heat unit only can reclaim the heat of air conditioner load 20% left and right, and hot water output is less, is far not enough to satisfy the demands, and still needs to install the equipment such as boiler, and investment and maintenance cost do not reduce.Though full recuperation of heat unit can provide enough domestic hot-waters, but produce hot water because only have operation just can carry out recuperation of heat during air-conditioning, hot water production will be limited by operation of air conditioner, can not, completely according to user demand flexible modulation, cannot meet the actual requirement of hot water supply at any time.Therefore such unit only possesses three kinds of functions conventionally, and domestic hot-water is produced in air conditioner refrigerating, air-conditioning heating, air conditioner refrigerating+recuperation of heat.Except the summer of running refrigerating, such unit cannot provide separately domestic hot-water, and function is perfect not, still needs to install boiler and supplements hot water supply.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of four control multifunctional wind cooling cold and hot water units, solve existing air-to-water heat pump only the summer except refrigeration, such unit cannot provide separately domestic hot-water, function is perfect not, still needs to install the technical problem that boiler supplements hot water supply.
The technical scheme that the utility model solves the problems of the technologies described above is as follows: a kind of four control multifunctional wind cooling cold and hot water units, comprise compressor, the first four-way change-over valve, the second four-way change-over valve, heat regenerator, evaporimeter, gas-liquid separator, reservoir, device for drying and filtering, expansion valve, minute liquid, finned coil pipe; The exhaust outlet of described compressor is connected with the interface DIS of described the first four-way change-over valve, the interface NO of described the first four-way change-over valve is connected with the interface DIS of described the second four-way change-over valve, the interface NC of described the first four-way change-over valve is connected with the air inlet of described heat regenerator, and the liquid outlet of described heat regenerator is connected with the import of described reservoir; The interface SUC of described the first four-way change-over valve is connected with the air inlet of described gas-liquid separator respectively with the interface SUC of the second four-way change-over valve, and the gas outlet of described gas-liquid separator is connected with the air entry of described compressor; The interface NO of described the second four-way change-over valve is connected with the upper port of described finned coil pipe, and the lower port of described finned coil pipe is connected with the import of described minute liquid, and the interface NC of described the second four-way change-over valve is connected with the air entry of described evaporimeter; The import of described device for drying and filtering is connected respectively at the liquid outlet of the liquid outlet of described reservoir, described minute liquid, the liquid outlet of described evaporimeter, the outlet of described device for drying and filtering is connected with the import of described expansion valve, and the outlet of described expansion valve is connected with the liquid outlet of described minute liquid, the liquid outlet of the liquid outlet of described heat regenerator, described evaporimeter respectively.
The beneficial effects of the utility model are: the utility model not only can provide air conditioning function, and can produce domestic hot-water; For existing air-conditioning demand, having again hot water demand's use occasion, is the solution of a kind of air-conditioning and hot-water integration; A unit possesses the function of air-conditioning, two kinds of equipment of boiler, has saved boiler investment, and initial cost and operation expense are saved.
Further: between described device for drying and filtering and described expansion valve, to be provided with economizer; The outlet of described device for drying and filtering is connected with the cold side inlet of crossing of described economizer, and the outlet of described economizer is connected with the import of described expansion valve.
Further: between the import of described device for drying and filtering and the liquid outlet of described minute liquid, to be provided with check valve, between the import of described device for drying and filtering and the liquid outlet of described evaporimeter, be provided with check valve, between the import of described device for drying and filtering and the liquid outlet of described reservoir, be provided with check valve; Between the liquid outlet of the outlet of described expansion valve and described minute liquid, be provided with magnetic valve and check valve, between the outlet of described expansion valve and the liquid outlet of described evaporimeter, be provided with magnetic valve and check valve, between the outlet of described expansion valve and the liquid outlet of described heat regenerator, be provided with magnetic valve and check valve.
The beneficial effect of above-mentioned further scheme is: economizer causes the shwoot steam generating after inter-stage throttling in corresponding stage and compresses, to reduce the system of compressor power consumption.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment mono-;
Fig. 2 is the structural representation of the utility model embodiment bis-.
In accompanying drawing, the list of parts of each label representative is as follows:
1, compressor, the 2, first four-way change-over valve, the 3, second four-way change-over valve, 4, heat regenerator, 5, evaporimeter, 6, gas-liquid separator, 7, reservoir, 8, device for drying and filtering, 9, economizer, 10, expansion valve, 11, economizer expansion valve, 12, knockout, 13, finned coil pipe, 14-1, check valve, 14-2, check valve, 14-3, check valve, 14-4, check valve, 14-5, check valve, 14-6, check valve, 14-7, check valve, 15-1, magnetic valve, 15-2, magnetic valve, 15-3, magnetic valve, 15-4, magnetic valve.
The specific embodiment
Below in conjunction with accompanying drawing, principle of the present utility model and feature are described, example, only for explaining the utility model, is not intended to limit scope of the present utility model.
Embodiment mono-: as shown in Figure 1, be a kind of four control multifunctional wind cooling cold and hot water units with economizer cycle; The exhaust outlet of compressor 1 is connected with the interface DIS of the first four-way change-over valve 2, the interface NO of the first four-way change-over valve 2 is connected with the interface DIS of the second four-way change-over valve 3, the interface NC of the first four-way change-over valve 2 is connected with the air inlet of heat regenerator 4, the interface SUC of the interface SUC of the first four-way change-over valve 2 and the second four-way change-over valve 3 is connected with the air inlet of gas-liquid separator 6 respectively, and the gas outlet of gas-liquid separator 6 is connected with the air entry of compressor 1.The interface NO of the second four-way change-over valve 3 is connected with finned coil pipe 13, and the interface NC of the second four-way change-over valve 3 is connected with the air entry of evaporimeter 5.The liquid outlet of heat regenerator 4 is connected with the import of reservoir 7, and the liquid outlet of reservoir 7 is connected with the import of device for drying and filtering 8 through check valve 14-3.The import of device for drying and filtering 8 also connects two other branch: one is to be connected with the liquid outlet of evaporimeter 5, between the liquid outlet of the import of device for drying and filtering 8 and evaporimeter 5, be provided with check valve 14-2, the flow direction of check valve 14-2 is for flowing to the import of device for drying and filtering 8 from the liquid outlet of evaporimeter 5; Another is to be connected with the liquid outlet of minute liquid 12, this branch road is for collecting the highly pressurised liquid from finned coil pipe 13, between the liquid outlet of the import of device for drying and filtering 8 and minute liquid 12, be provided with check valve 14-1, the flow direction of check valve 14-1 is for dividing the liquid outlet of liquid 12 to flow to the import of device for drying and filtering 8.The cold side inlet of crossing of the outlet of device for drying and filtering 8 and economizer 9 is connected, and highly pressurised liquid is crossed after cold and flowed out from the outlet of economizer 9 import that enters expansion valve 10.The outlet of expansion valve 10 divides three branch roads, and the outlet of expansion valve 10 connects respectively the liquid outlet of the liquid outlet of minute liquid 12, the liquid outlet of heat regenerator 4 and evaporimeter 5; Between the liquid outlet of the outlet of expansion valve 10 and minute liquid 12, be provided with magnetic valve 15-1, check valve 14-4, between the liquid outlet of the outlet of expansion valve 10 and evaporimeter 5, be provided with magnetic valve 15-2, check valve 14-5, between the outlet of expansion valve 10 and the liquid outlet of heat regenerator 4, be provided with magnetic valve 15-3, check valve 14-6; Magnetic valve and check valve are all installed on each arm.Knockout 12 is provided with a plurality of inlets, the number of inlet is identical with the number of finned coil pipe 13, finned coil pipe 13 is arranged in parallel four, the inlet of knockout 12 is connected with the liquid outlet of each finned coil pipe 13 respectively, the liquid outlet of the corresponding finned coil pipe 13 of an inlet of knockout 12.
Pattern one: during unit operation air conditioner refrigerating, the interface DIS of the first four-way change-over valve 2 communicates with interface NO, interface NC communicates with interface SUC; The interface DIS of the second four-way change-over valve 3 and NO connection, interface SUC and NC connect.Magnetic valve 15-1 and magnetic valve 15-3 close, and magnetic valve 15-2 opens.The high pressure gas of compressor 1 enters finned coil pipe 13 and carries out condensation through exhaust outlet, the first four-way change-over valve 2, second four-way change-over valve 3 of compressor 1.Condensed highly pressurised liquid flow in knockout 12, through the liquid outlet of knockout 12, discharges, and the liquid of the discharge of knockout 12 enters economizer 9 through check valve 14-1, device for drying and filtering 8 and carried out cold.Cross highly pressurised liquid after cold after expansion valve 10 throttlings, through magnetic valve 15-2, check valve 14-5, enter evaporimeter 5 evaporations and produce air conditioning water.Low-pressure gas after evaporation enters gas-liquid separator 6 through the second four-way change-over valve 3, again sucks compressor cycle compression.
Pattern two: during unit operation air-conditioning heating, the interface DIS of the first four-way change-over valve 2 communicates with interface NO, interface NC communicates with interface SUC; The spool conversion of the second four-way change-over valve 3, connects the interface DIS of the second four-way change-over valve 3 and interface NC connection, interface NO and interface SUC.Now magnetic valve 15-1 opens, magnetic valve 15-2 opens, magnetic valve 15-3 closes.Gases at high pressure from compressor 1 enter evaporimeter 5 (now making condenser) condensation through the first four-way change-over valve 2, the second four-way change-over valve 3, condensed highly pressurised liquid through check valve 14-2, that device for drying and filtering 8 enters economizer 9 is excessively cold, cross highly pressurised liquid after cold after expansion valve 10 throttlings, through magnetic valve 15-1, check valve 14-4, knockout 12, enter coil pipe unit 13 evaporations again, evaporation process absorbs heat energy from air.Low-pressure gas after evaporation sucks compressor cycle compression again through the second four-way change-over valve 3, gas-liquid separator 6.
Pattern three: during unit operation refrigeration heating recovery function, the interface DIS of the first four-way change-over valve 2 and NC connection, NO and SUC connect; The interface DIS of the second four-way change-over valve 3 and NO connection, interface SUC and NC connect.Magnetic valve 15-1 closes, magnetic valve 15-3 closes, magnetic valve 15-2 opens.The high pressure gas of compressor 1 enters heat regenerator 4 through the first four-way change-over valve 2 and carries out condensation, and condensation liberated heat is produced hot water for life for heating.Condensed highly pressurised liquid enters economizer 9 through reservoir 7, check valve 14-3, device for drying and filtering 8 and carried out cold.Cross highly pressurised liquid after cold after expansion valve 10 throttlings, through magnetic valve 15-2, check valve 14-5, enter evaporimeter 5 evaporations and produce air conditioning water.Low-pressure gas after evaporation enters gas-liquid separator 6 through the second four-way change-over valve 3, again sucks compressor cycle compression.
Pattern four: during unit operation heat pump water-heating machine function, the interface DIS of the first four-way change-over valve 2 and interface NC connection, interface NO and interface SUC connect; The interface DIS of the second four-way change-over valve 3 and interface NC connection, interface SUC and interface NO connect.Magnetic valve 15-1 opens, magnetic valve 15-2 closes, magnetic valve 15-3 closes.The high pressure gas of compressor 1 enters heat regenerator 4 through the first four-way change-over valve 2 and carries out condensation, and condensation liberated heat is produced hot water for life for heating.Condensed highly pressurised liquid enters economizer 9 through reservoir 7, check valve 14-3, device for drying and filtering 8 and carried out cold.Cross highly pressurised liquid after cold after expansion valve 10 throttlings, through magnetic valve 15-1, check valve 14-4, enter finned coil pipe 13 evaporations, evaporation process absorbs heat from air, and the low-pressure gas after evaporation enters gas-liquid separator 6 through the second four-way change-over valve 3, again sucks compressor 1 circulation compression.
Embodiment bis-: as shown in Figure 2: for not with four control multifunctional wind cooling cold and hot water units of economizer cycle; Compare with embodiment mono-, embodiment bis-does not have economizer 9 and respective line part.The outlet of device for drying and filtering 8 is directly connected with the entrance of expansion valve 10.Highly pressurised liquid after condensation evaporates after the cooling procedure again of economizer 9 directly enters expansion valve 10 throttlings.Unit heating recovery, Teat pump boiler operational mode and the embodiment indistinction in the lump that freezes, heats, freezes.
During unit operation for embodiment mono-and embodiment bis-, the control that the first four-way change-over valve 2, the second four-way change-over valve 3 is commutated, individual magnetic valve is carried out by automatic control system, can make unit freely switch between each functional mode, to give full play to the advantage of unit.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (4)
1. four control multifunctional wind cooling cold and hot water units, is characterized in that: comprise compressor (1), the first four-way change-over valve (2), the second four-way change-over valve (3), heat regenerator (4), evaporimeter (5), gas-liquid separator (6), reservoir (7), device for drying and filtering (8), expansion valve (10), minute liquid (12), finned coil pipe (13); The exhaust outlet of described compressor (1) is connected with the interface DIS of described the first four-way change-over valve (2), the interface NO of described the first four-way change-over valve (2) is connected with the interface DIS of described the second four-way change-over valve (3), the interface NC of described the first four-way change-over valve (2) is connected with the air inlet of described heat regenerator (4), and the liquid outlet of described heat regenerator (4) is connected with the import of described reservoir (7); The interface SUC of the interface SUC of described the first four-way change-over valve (2) and the second four-way change-over valve (3) is connected with the air inlet of described gas-liquid separator (6) respectively, and the gas outlet of described gas-liquid separator (6) is connected with the air entry of described compressor (1); The interface NO of described the second four-way change-over valve (3) is connected with the upper port of described finned coil pipe (13), the lower port of described finned coil pipe (13) with described minute liquid (12) import be connected, the interface NC of described the second four-way change-over valve (3) is connected with the air entry of described evaporimeter (5); The import of described device for drying and filtering (8) respectively at the liquid outlet of described reservoir (7), described minute liquid (12) liquid outlet, the liquid outlet of described evaporimeter (5) be connected, the outlet of described device for drying and filtering (8) is connected with the import of described expansion valve (10), the outlet of described expansion valve (10) respectively with described minute liquid (12) liquid outlet, the liquid outlet of described heat regenerator (4), the liquid outlet of described evaporimeter (5) be connected.
2. a kind of four control multifunctional wind cooling cold and hot water units according to claim 1, is characterized in that: between described device for drying and filtering (8) and described expansion valve (10), be provided with economizer (9); The outlet of described device for drying and filtering (8) is connected with the cold side inlet of crossing of described economizer (9), and the outlet of described economizer (9) is connected with the import of described expansion valve (10).
3. a kind of four control multifunctional wind cooling cold and hot water units according to claim 2, it is characterized in that: the import of described device for drying and filtering (8) and described minute liquid (12) liquid outlet between be provided with check valve (14-1), between the liquid outlet of the import of described device for drying and filtering (8) and described evaporimeter (5), be provided with check valve (14-2), between the import of described device for drying and filtering (8) and the liquid outlet of described reservoir (7), be provided with check valve (14-3); The outlet of described expansion valve (10) and described minute liquid (12) liquid outlet between be provided with magnetic valve (15-1) and check valve (14-4), between the liquid outlet of the outlet of described expansion valve (10) and described evaporimeter (5), be provided with magnetic valve (15-2) and check valve (14-5), between the outlet of described expansion valve (10) and the liquid outlet of described heat regenerator (4), be provided with magnetic valve (15-3) and check valve (14-6).
4. according to the arbitrary described a kind of four control multifunctional wind cooling cold and hot water units of claims 1 to 3, it is characterized in that: described finned coil pipe (13) is arranged in parallel four.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420306996.4U CN203893496U (en) | 2014-06-10 | 2014-06-10 | Four-pipe multifunctional air-cooled cold and hot water unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420306996.4U CN203893496U (en) | 2014-06-10 | 2014-06-10 | Four-pipe multifunctional air-cooled cold and hot water unit |
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| Publication Number | Publication Date |
|---|---|
| CN203893496U true CN203893496U (en) | 2014-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420306996.4U Expired - Lifetime CN203893496U (en) | 2014-06-10 | 2014-06-10 | Four-pipe multifunctional air-cooled cold and hot water unit |
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| CN (1) | CN203893496U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075487A (en) * | 2014-06-10 | 2014-10-01 | 烟台顿汉布什工业有限公司 | Four-pipe multifunctional air-cooled cold and hot water unit |
| CN113834239A (en) * | 2021-10-14 | 2021-12-24 | 烟台德瑞福节能科技有限公司 | Automatic circulation method and device for refrigeration and heating |
-
2014
- 2014-06-10 CN CN201420306996.4U patent/CN203893496U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075487A (en) * | 2014-06-10 | 2014-10-01 | 烟台顿汉布什工业有限公司 | Four-pipe multifunctional air-cooled cold and hot water unit |
| CN113834239A (en) * | 2021-10-14 | 2021-12-24 | 烟台德瑞福节能科技有限公司 | Automatic circulation method and device for refrigeration and heating |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 264003 Shandong city of Yantai province Laishan dunham-bush Road Economic Development Zone No. 1 Patentee after: DUNHAM-BUSH (CHINA) CO.,LTD. Address before: 264003 Shandong city of Yantai province Laishan dunham-bush Road Economic Development Zone No. 1 Patentee before: DUNHAM-BUSH YANTAI Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141022 |