CN203731779U - Defrosting system of air-cooled refrigerator - Google Patents
Defrosting system of air-cooled refrigerator Download PDFInfo
- Publication number
- CN203731779U CN203731779U CN201320682128.1U CN201320682128U CN203731779U CN 203731779 U CN203731779 U CN 203731779U CN 201320682128 U CN201320682128 U CN 201320682128U CN 203731779 U CN203731779 U CN 203731779U
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- China
- Prior art keywords
- defrosting
- controller
- electric heating
- evaporator
- refrigerator
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Abstract
The utility model discloses a defrosting system of an air-cooled refrigerator. The defrosting system comprises an evaporator, one or a plurality of electric heating pipes, a controller, an evaporator temperature sensor, a water collecting tray and a freezing chamber temperature sensor. The electric heating pipes are fixed into a heat exchange pipe of the evaporator and are connected with the controller, the evaporator wall surface temperature sensor is arranged on the surface of the heat exchange pipe of the evaporator and is connected with the controller, the freezing chamber temperature sensor is mounted on the inner wall of a freezing chamber of the air-cooled refrigerator and is connected with the controller, and the water collecting tray is arranged below the evaporator. A method for controlling the defrosting system includes detecting the wall surface temperature of the evaporator and the temperature of the freezing chamber under the effect of the controller, combining the wall surface temperature of the evaporator, the temperature of the freezing chamber and the cumulative running time of a compressor with one another under the effect of the controller, or comparing the total running time of the compressor so as to judge whether defrosting is required or not; exiting from defrosting procedures when the temperatures T of refrigerants in the heat exchange pipe are higher than or equal to a temperature T<3> or the defrosting time t<defrosting> is shorter than or equal to time t<2>; restarting the refrigerator after defrosted water is drained out of the refrigerator, and enabling the refrigerator to enter a next refrigerating cycle. The defrosting system and the method have the advantages that a uniform defrosting effect can be realized, the defrosting time can be shortened, the electric heating defrosting efficiency can be improved, and energy consumption of the refrigerator can be reduced.
Description
Technical field
The utility model belongs to refrigerator manufacturing technology field, is specifically related to a kind of defrost system of wind cooling refrigerator.
Background technology
The frosting meeting of air cooling refrigerator evaporator increases the thermal resistance of evaporimeter and freezing room air, hinder the heat exchange of evaporator surface, thereby affect refrigeration, increase power consumption, therefore wind cooling refrigerator will defrost timely, and the main Defrost mode of wind cooling refrigerator is electric heated defrosting at present.Electrical heating method defrost comprises two kinds: the one, and quartz ampoule radiation defrosting; The 2nd, utilize the aluminum electrical heating wire defrosting that is arranged in evaporimeter outside.The defroster of general refrigerator comprises evaporimeter, defrosting heating tube, drip tray heating tube, evaporator temperature sensor, high temperature fuse, refrigerator controller.After the defrost process of general refrigerator is refrigerator work certain hour, refrigerator controller is connected defrosting heating tube, and defrosting heating tube work is until the frost layer of evaporimeter is dissolved, and defrosting water is discharged from drip tray and drainpipe, and defrost process finishes.
Due to the position of placing and structure realization, there is the inhomogeneous shortcoming of defrosting in electrical heating, causes defrosting time to extend; And the heating tube long-time heating of electrical heating defrost, power is large, and the waste heat that causes defrosting is large; The High Temperature Gas during defrosting casing that bleeds that fails to be convened for lack of a quorum, causes the temperature fluctuation of refrigerator inside larger,, not only consumed energy but also wasted the original cold of evaporimeter, caused energy consumption of refrigerator to increase; Due to the radiation in electrical heating process, the efficient heat directly being utilized is limited, causes the efficiency of electric heated defrosting low.
Summary of the invention
The problem existing in order to solve above-mentioned prior art, the purpose of this utility model is to provide a kind of defrost system of wind cooling refrigerator, can solve exist in conventional electric heated defrosting mode inhomogeneous, defrosting efficiency is low, the large problem of defrosting waste heat.
For reaching above object, the utility model adopts following technical scheme:
A kind of defrost system of wind cooling refrigerator, comprise evaporimeter 1, electric heating tube 2, controller 3, evaporator wall surface temperature sensor 4, drip tray 6 and freezer temperature sensor 7, described electric heating tube 2 one or more ground are fixed in the heat exchanger tube 8 of evaporimeter 1, and be connected with controller 3, described evaporator wall surface temperature sensor 4 is arranged in heat exchanger tube 8 surfaces of evaporimeter 1, and be connected with controller 3, described freezer temperature sensor 7 is arranged on wind cooling refrigerator freezer indoor wall, and be connected with controller 3, described drip tray 6 be placed in evaporimeter 1 under; Comprise defrosting temperature controller 5, described defrosting temperature controller 5 is arranged in heat exchanger tube 8, after defrosting temperature controller 5 and electric heating tube 2 series connection, is connected on controller 3.
Described electric heating tube 2 is comprised of metal tube 10 and the electrical heating wire 9 being embedded in metal tube 10.
Described controller 3 has the function of timer.
The control method of the defrost system of wind cooling refrigerator described above, comprises the steps:
Step 1: during wind cooling refrigerator refrigerating operaton, compressor start, controller 3 starts to accumulate compressor operating time, when controller 3 detects compressor Cumulative Elapsed Time t
accumulation>=t
1, t
1=60～600min, heat exchange pipe of evaporator wall surface temperature Te≤T
1, T
1=-30～-5 ℃, and freezer temperature T
freezing>=T
2time, T
2=-20～-5 ℃; Or work as the defrosting cycle t that compressor total run time reaches setting
cycletime, enter defrost process;
Step 2: during defrosting, controller 3 close compressor, connect defrosting electric heating circuit and make electrical heating wire 9 heating, start defrosting time timing with Time Controller 3; Electric heating tube 2 transfers heat to the cold-producing medium in evaporimeter 1, more than promoting refrigerant temperatures to 0 ℃ with electric heating tube 2, cold-producing medium transfers heat to heat exchanger tube 8 tube walls and the fin of evaporimeter 1 again, thereby make the frost layer on evaporimeter 1 and fin surface absorb heat, from the inside of frost layer, start defrost, frost changes into water and falls into the interior discharge wind cooling refrigerator of drip tray 6;
Step 3: near the interior electric heating tube of heat exchanger tube 82 refrigerant temperature T>=T
3time, T
3=5～50 ℃, defrosting temperature controller 5 disconnects, and cuts off defrosting electric heating circuit; Or defrosting time t
defrosting>=t
2time, t
2=10～50min, controller 3 cuts off defrosting electric heating circuit; After defrosting electric heating circuit cuts off, stop electrical heating, exit defrost process; Stop after electrical heating wire, postpone 2～5Min, treat that defrost water roughly discharges refrigerator, start compressor, enter next kind of refrigeration cycle.
In step 3, when the operation of controller 3 cut-out defrosting electric heating circuits is broken down, defrosting temperature controller 5 disconnects, and plays a protective role, and prevents excess Temperature.
The utility model electric heating tube 2 is welded to heat exchanger tube 8 inside of evaporimeter 1, and the heat of electrical heating wire 9 passes to cold-producing medium by the mode of conduction and convection, and then passes to evaporimeter tube wall and fin, from the inside of frost layer, starts defrost.Defrosting combines to judge whether to exit defrost process according to evaporator wall surface temperature and defrosting time.Compared with prior art, tool has the following advantages:
1). electrical heating wire 9 of the present utility model is embedded in metal tube 10 the insides; electric heating tube 2 is welded to heat exchanger tube 8 inside of evaporimeter 1; in compressor shutdown defrost process; the heat of electrical heating wire 9 passes to cold-producing medium, evaporimeter tube wall successively by the mode of conduction and convection; frost layer, does not have radiant heat transfer, and energy utilization rate is high; the indoor temperature fluctuation of refrigerator freezing is little, saves energy consumption.
2). electrical heating wire can one or more be arranged in the heat exchanger tube 8 of whole evaporimeter 1 equably, improves the uniformity of defrost, shortens the defrost time.
3). during defrosting, effectively utilize freezer compressor and defrost downtime, now the frost layer of the more general Defrost method of frost layer is thin, and defrosting power consumption is little, and after defrosting, refrigerator performance is improved.
4). the judgement of exiting defrosting is to judge according to the refrigerant temperature in heat exchanger tube or defrosting time, and the step that exits defrosting is more timely, reduces thermic load.
The utlity model has obvious characteristics and advantages, for the defect of current wind cooling refrigerator defrosting, provided solve defrosting efficiency low, defrost inhomogeneous, defrosting time long, fluctuate large thinking and method of freezer temperature in defrost process.
Accompanying drawing explanation
Fig. 1 is the structure chart of the utility model defrost system.
Fig. 2 is the structure chart of electric heating tube in evaporator tube.
Fig. 3 is the control method flow chart of defrost system.
The specific embodiment
Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.
As shown in Figure 1, the defrost system of a kind of wind cooling refrigerator of the utility model, comprise evaporimeter 1, electric heating tube 2, controller 3, evaporator wall surface temperature sensor 4, drip tray 6 and freezer temperature sensor 7, described electric heating tube 2 one or more be welded in the heat exchanger tube 8 of evaporimeter 1, and be connected with controller 3, described evaporator wall surface temperature sensor 4 is arranged in heat exchanger tube 8 surfaces of evaporimeter 1, and be connected with controller 3, described freezer temperature sensor 7 is arranged on wind cooling refrigerator freezer indoor wall, and be connected with controller 3, described drip tray 6 be placed in evaporimeter 1 under, also comprise defrosting temperature controller 5, described defrosting temperature controller 5 is arranged in heat exchanger tube 8, after defrosting temperature controller 5 and electric heating tube 2 series connection, is connected on controller 3.
Described controller 3 has the function of timer.
As shown in Figure 2, described electric heating tube 2 is comprised of metal tube 10 and the electrical heating wire 9 being embedded in metal tube 10, and electric heating tube 2 fixing points of composition are welded in the heat exchanger tube 8 of evaporimeter 1
Embodiment 1
As shown in Figure 3, the control method of the defrost system of the present embodiment wind cooling refrigerator, comprises the steps:
Step 1: during wind cooling refrigerator refrigerating operaton, compressor start, controller 3 starts to accumulate compressor operating time, when controller 3 detects compressor Cumulative Elapsed Time t
accumulation>=t
1, t
1=60min, heat exchange pipe of evaporator wall surface temperature Te≤T
1, T
1=-30 ℃, and freezer temperature T
freezing>=T
2time, T
2=-20 ℃; Or work as the defrosting cycle t that compressor total run time reaches setting
cycletime, enter defrost process;
Step 2: during defrosting, controller 3 close compressor, connect defrosting electric heating circuit and make electrical heating wire 9 heating, start defrosting time timing with Time Controller 3; Electric heating tube 2 transfers heat to the cold-producing medium in evaporimeter 1, more than promoting refrigerant temperatures to 0 ℃ with electric heating tube 2, cold-producing medium transfers heat to heat exchanger tube 8 tube walls and the fin of evaporimeter 1 again, thereby make the frost layer on evaporimeter 1 and fin surface absorb heat, from the inside of frost layer, start defrost, frost changes into water and falls into the interior discharge wind cooling refrigerator of drip tray 6;
Step 3: near the interior electric heating tube of heat exchanger tube 82 refrigerant temperature T>=T
3time, T
3=5 ℃, defrosting temperature controller 5 disconnects, and cuts off defrosting electric heating circuit; Or defrosting time t
defrosting>=t
2time, t
2=10min, controller 3 cuts off defrosting electric heating circuit; After defrosting electric heating circuit cuts off, stop electrical heating, exit defrost process; Stop after electrical heating wire, postpone 2～5Min, treat that defrost water roughly discharges refrigerator, start compressor, enter next kind of refrigeration cycle.
In step 3, when the operation of controller 3 cut-out defrosting electric heating circuits is broken down, defrosting temperature controller 5 disconnects, and plays a protective role, and prevents excess Temperature.
Embodiment 2
As shown in Figure 3, the control method of the defrost system of the present embodiment wind cooling refrigerator, comprises the steps:
Step 1: during wind cooling refrigerator refrigerating operaton, compressor start, controller 3 starts to accumulate compressor operating time, when controller 3 detects compressor Cumulative Elapsed Time t
accumulation>=t
1, t
1=600min, heat exchange pipe of evaporator wall surface temperature Te≤T
1, T
1=-5 ℃, and freezer temperature T
freezing>=T
2time, T
2=-5 ℃; Or work as the defrosting cycle t that compressor total run time reaches setting
cycletime, enter defrost process;
Step 2: during defrosting, controller 3 close compressor, connect defrosting electric heating circuit and make electrical heating wire 9 heating, start defrosting time timing with Time Controller 3; Electric heating tube 2 transfers heat to the cold-producing medium in evaporimeter 1, more than promoting refrigerant temperatures to 0 ℃ with electric heating tube 2, cold-producing medium transfers heat to heat exchanger tube 8 tube walls and the fin of evaporimeter 1 again, thereby make the frost layer on evaporimeter 1 and fin surface absorb heat, from the inside of frost layer, start defrost, frost changes into water and falls into the interior discharge wind cooling refrigerator of drip tray 6;
Step 3: near the interior electric heating tube of heat exchanger tube 82 refrigerant temperature T>=T
3time, T
3=50 ℃, defrosting temperature controller 5 disconnects, and cuts off defrosting electric heating circuit; Or defrosting time t
defrosting>=t
2time, t
2=50min, controller 3 cuts off defrosting electric heating circuit; After defrosting electric heating circuit cuts off, stop electrical heating, exit defrost process; Stop after electrical heating wire, postpone 2～5Min, treat that defrost water roughly discharges refrigerator, start compressor, enter next kind of refrigeration cycle.
In step 3, when the operation of controller 3 cut-out defrosting electric heating circuits is broken down, defrosting temperature controller 5 disconnects, and plays a protective role, and prevents excess Temperature.
Embodiment 3
As shown in Figure 3, the control method of the defrost system of the present embodiment wind cooling refrigerator, comprises the steps:
Step 1: during wind cooling refrigerator refrigerating operaton, compressor start, controller 3 starts to accumulate compressor operating time, when controller 3 detects compressor Cumulative Elapsed Time t
accumulation>=t
1, t
1=100min, heat exchange pipe of evaporator wall surface temperature Te≤T
1, T
1=-20 ℃, and freezer temperature T
freezing>=T
2time, T
2=-15 ℃; Or work as the defrosting cycle t that compressor total run time reaches setting
cycletime, enter defrost process;
Step 2: during defrosting, controller 3 close compressor, connect defrosting electric heating circuit and make electrical heating wire 9 heating, start defrosting time timing with Time Controller 3; Electric heating tube 2 transfers heat to the cold-producing medium in evaporimeter 1, more than promoting refrigerant temperatures to 0 ℃ with electric heating tube 2, cold-producing medium transfers heat to heat exchanger tube 8 tube walls and the fin of evaporimeter 1 again, thereby make the frost layer on evaporimeter 1 and fin surface absorb heat, from the inside of frost layer, start defrost, frost changes into water and falls into the interior discharge wind cooling refrigerator of drip tray 6;
Step 3: near the interior electric heating tube of heat exchanger tube 82 refrigerant temperature T>=T
3time, T
3=10 ℃, defrosting temperature controller 5 disconnects, and cuts off defrosting electric heating circuit; Or defrosting time t
defrosting>=t
2time, t
2=20min, controller 3 cuts off defrosting electric heating circuit; After defrosting electric heating circuit cuts off, stop electrical heating, exit defrost process; Stop after electrical heating wire, postpone 2～5Min, treat that defrost water roughly discharges refrigerator, start compressor, enter next kind of refrigeration cycle.
In step 3, when the operation of controller 3 cut-out defrosting electric heating circuits is broken down, defrosting temperature controller 5 disconnects, and plays a protective role, and prevents excess Temperature.
Embodiment 4
As shown in Figure 3, the control method of the defrost system of the present embodiment wind cooling refrigerator, comprises the steps:
Step 1: during wind cooling refrigerator refrigerating operaton, compressor start, controller 3 starts to accumulate compressor operating time, when controller 3 detects compressor Cumulative Elapsed Time t
accumulation>=t
1, t
1=400min, heat exchange pipe of evaporator wall surface temperature Te≤T
1, T
1=-15 ℃, and freezer temperature T
freezing>=T
2time, T
2=-10 ℃; Or work as the defrosting cycle t that compressor total run time reaches setting
cycletime, enter defrost process;
Step 2: during defrosting, controller 3 close compressor, connect defrosting electric heating circuit and make electrical heating wire 9 heating, start defrosting time timing with Time Controller 3; Electric heating tube 2 transfers heat to the cold-producing medium in evaporimeter 1, more than promoting refrigerant temperatures to 0 ℃ with electric heating tube 2, cold-producing medium transfers heat to heat exchanger tube 8 tube walls and the fin of evaporimeter 1 again, thereby make the frost layer on evaporimeter 1 and fin surface absorb heat, from the inside of frost layer, start defrost, frost changes into water and falls into the interior discharge wind cooling refrigerator of drip tray 6;
Step 3: near the interior electric heating tube of heat exchanger tube 82 refrigerant temperature T>=T
3time, T
3=30 ℃, defrosting temperature controller 5 disconnects, and cuts off defrosting electric heating circuit; Or defrosting time t
defrosting>=t
2time, t
2=40min, controller 3 cuts off defrosting electric heating circuit; After defrosting electric heating circuit cuts off, stop electrical heating, exit defrost process; Stop after electrical heating wire, postpone 2～5Min, treat that defrost water roughly discharges refrigerator, start compressor, enter next kind of refrigeration cycle.
In step 3, when the operation of controller 3 cut-out defrosting electric heating circuits is broken down, defrosting temperature controller 5 disconnects, and plays a protective role, and prevents excess Temperature.
Claims (3)
1. the defrost system of a wind cooling refrigerator, comprise evaporimeter (1), electric heating tube (2), controller (3), evaporator wall surface temperature sensor (4), drip tray (6) and freezer temperature sensor (7), it is characterized in that: one or more ground of described electric heating tube (2) is fixed in the heat exchanger tube (8) of evaporimeter (1), and be connected with controller (3), described evaporator wall surface temperature sensor (4) is arranged in heat exchanger tube (8) surface of evaporimeter (1), and be connected with controller (3), described freezer temperature sensor (7) is arranged on wind cooling refrigerator freezer indoor wall, and be connected with controller (3), described drip tray (6) be placed in evaporimeter (1) under, also comprise defrosting temperature controller (5), described defrosting temperature controller (5) is arranged in heat exchanger tube (8), after defrosting temperature controller (5) and electric heating tube (2) series connection, is connected on controller (3).
2. the defrost system of a kind of wind cooling refrigerator according to claim 1, is characterized in that: described electric heating tube (2) is comprised of metal tube (10) and the electrical heating wire (9) that is embedded in metal tube (10).
3. the defrost system of a kind of wind cooling refrigerator according to claim 1, is characterized in that: described controller (3) has the function of timer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320682128.1U CN203731779U (en) | 2013-10-30 | 2013-10-30 | Defrosting system of air-cooled refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320682128.1U CN203731779U (en) | 2013-10-30 | 2013-10-30 | Defrosting system of air-cooled refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203731779U true CN203731779U (en) | 2014-07-23 |
Family
ID=51201847
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320682128.1U Expired - Fee Related CN203731779U (en) | 2013-10-30 | 2013-10-30 | Defrosting system of air-cooled refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203731779U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591751A (en) * | 2013-10-30 | 2014-02-19 | 西安交通大学 | Defrosting system of air cooling refrigerator and defrosting control method thereof |
| CN104596199A (en) * | 2015-02-09 | 2015-05-06 | 合肥美的电冰箱有限公司 | Refrigeration control method, refrigeration control device and air cooling refrigerator |
| CN104833167A (en) * | 2015-02-27 | 2015-08-12 | 河南新飞电器有限公司 | Air cooling refrigerator defrosting method |
| CN108955034A (en) * | 2018-08-13 | 2018-12-07 | 长虹美菱股份有限公司 | A kind of refrigerator method for heating and controlling |
-
2013
- 2013-10-30 CN CN201320682128.1U patent/CN203731779U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591751A (en) * | 2013-10-30 | 2014-02-19 | 西安交通大学 | Defrosting system of air cooling refrigerator and defrosting control method thereof |
| CN103591751B (en) * | 2013-10-30 | 2016-02-24 | 西安交通大学 | A kind of defrost system of wind cooling refrigerator and defrosting control method thereof |
| CN104596199A (en) * | 2015-02-09 | 2015-05-06 | 合肥美的电冰箱有限公司 | Refrigeration control method, refrigeration control device and air cooling refrigerator |
| CN104833167A (en) * | 2015-02-27 | 2015-08-12 | 河南新飞电器有限公司 | Air cooling refrigerator defrosting method |
| CN108955034A (en) * | 2018-08-13 | 2018-12-07 | 长虹美菱股份有限公司 | A kind of refrigerator method for heating and controlling |
| CN108955034B (en) * | 2018-08-13 | 2021-01-08 | 长虹美菱股份有限公司 | Heating control method for refrigerator |
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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: 20140723 Termination date: 20161030 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |