CN206739692U - A kind of defrosting and refrigeration system and freezer - Google Patents
A kind of defrosting and refrigeration system and freezer Download PDFInfo
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- CN206739692U CN206739692U CN201621161064.0U CN201621161064U CN206739692U CN 206739692 U CN206739692 U CN 206739692U CN 201621161064 U CN201621161064 U CN 201621161064U CN 206739692 U CN206739692 U CN 206739692U
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Abstract
A kind of defrosting and refrigeration system and freezer, including compressor, water pond defrosting pipe, evaporator coil and blast pressure difference switch are the utility model is related to, the outlet of compressor is connected by the tie point and the entrance of the second branch road and evaporator coil being arranged in parallel；Tie point includes hot-gas bypass pipe and evaporator water coil defrosting pipe, and the outlet of compressor passes sequentially through hot-gas bypass pipe and the connection of the entrance of evaporator water coil defrosting pipe and evaporator coil, the first control valve is provided with hot-gas bypass pipe；The second control valve is provided with second branch road；When pressure difference of the blast pressure difference switch between evaporator air inlet wind pressure sampling mouth and evaporator air outlet wind pressure sampling mouth is more than defrosting starting differential pressure, generation defrosting control signal；Defrosting the first control valve of control signal triggering, which is switched to opening and triggers the second control valve, is switched to cut-off state.Influence when the utility model improves freezer evaporator defrosting efficiency, shortens defrosting time, reduces defrosting to cold storage locker temperature.
Description
Technical field
Utility model is related to refrigeration technology field, more particularly to a kind of defrosting and refrigeration system and freezer.
Background technology
In freezer refrigerating application, when the temperature in use of freezer is less than 0 DEG C, particularly low-temperature cold-storage temperature in use is low
Water vapour in air in -18 DEG C, freezer will be in cold evaporator fin surface frosting, and temperature is lower, and frosting is more serious,
Frosting can cause the heat exchange efficiency degradation of evaporator, and evaporating temperature declines, and refrigerating capacity reduces, and the power consumption of compressor increases
Add, Energy Efficiency Ratio declines.Therefore have to carry out defrosting processing to freezer evaporator surface.
The evaporator surface defrosting of current middle-size and small-size freezer is main by the way of electric defrosting, which using
A number of electric heating tube is installed between evaporator coil fin, it is necessary to just start electrical heating when defrosting, passes through electric heating tube
Caused heat removes the frost layer of evaporator surface, and the control of electric heating tube is to be removed by a defrosting controller to set
What white cycle and defrosting time were realized.
This traditional electric defrosting pattern is primarily present problem：1）Due to using timing controlled defrosting mode, no
Pipe evaporator surface have it is white or frostless, all can force start defrosting electrical heating；2）Due to the skewness of electrothermal tube, easily lead
Defrosting inequality is caused, it is necessary to set longer defrosting time；3）Storehouse temperature influence of fluctuations to freezer is larger, influences the quality of food；
4）Power consumption during defrosting is larger, does not save seriously.
Therefore, defrosted for the evaporator of middle-size and small-size freezer, it is necessary to invent a kind of defrosting efficiency height, to cold storage locker Wen Ying
Ring small and energy-conservation freezer evaporator and remove defrosting system and control mode.
Utility model content
The purpose of this utility model is to provide a kind of defrosting and refrigeration system and freezer, is evaporated with solving freezer in the prior art
Device defrosting efficiency is low, defrosting time work, defrosting when the problem of big, the energy-saving effect difference that defrosts is influenceed on cold storage locker temperature.
In order to solve the above technical problems, as one side of the present utility model, there is provided a kind of defrosting and refrigeration system, bag
Include：Compressor, evaporator water coil defrosting pipe, evaporator coil and blast pressure difference switch, the outlet of compressor is by being arranged in parallel
Tie point and the connection of the entrance of the second branch road and evaporator coil, the entrance of the outlet of evaporator coil and compressor connect
Connect；Tie point includes hot-gas bypass pipe and evaporator water coil defrosting pipe, the outlet of compressor pass sequentially through hot-gas bypass pipe and
The entrance of evaporator water coil defrosting pipe and evaporator coil is connected, and the first control valve is provided with hot-gas bypass pipe；Second branch road
On be provided with the second control valve；The first end of blast pressure difference switch is connected with evaporator air inlet wind pressure sampling mouth, blast pressure difference
Second end of switch is connected with evaporator air outlet wind pressure sampling mouth, and blast pressure difference switch is in evaporator air inlet wind pressure sampling mouth
When pressure difference between evaporator air outlet wind pressure sampling mouth is more than defrosting starting differential pressure, generation defrosting control signal；Defrosting control
First control valve of signal triggering processed, which is switched to opening and triggers the second control valve, is switched to cut-off state.
Preferably, defrosting and refrigeration system also includes gas-liquid separator, the outlet of evaporator coil by gas-liquid separator with
The entrance connection of compressor.
Preferably, the second branch road includes the condenser, reservoir and the expansion valve that are sequentially connected, and condenser and compressor go out
The entrance of mouth connection, expansion valve and evaporator coil connects.
Preferably, the second control valve is arranged between reservoir and expansion valve.
Preferably, defrosting and refrigeration system also includes evaporator water coil, and water pond defrosting pipe is arranged on the top of evaporator water coil.
The utility model additionally provides a kind of freezer, wraps the defrosting and refrigeration system stated.
Freezer defrosting control model in the utility model is controlled based on blast pressure difference, adequately achieves the evaporation of freezer
Device defrosting efficiency is high, defrosting time is short, defrosting when cold storage locker temperature is influenceed it is small, defrost good energy-conserving effect the advantages that.
Brief description of the drawings
Fig. 1 diagrammatically illustrates structural representation of the present utility model.
Reference in figure：1st, compressor；2nd, evaporator air inlet wind pressure sampling mouth；3rd, evaporator water coil defrosting pipe；4、
Evaporator coil；5th, blast pressure difference switch；6th, hot-gas bypass pipe；7th, the first control valve；8th, the second control valve；9th, evaporator air-out
One's intention as revealed in what one says presses sample tap；10th, gas-liquid separator；11st, condenser；12nd, reservoir；13rd, expansion valve；14th, evaporator water coil；15th, steam
Send out device fin.
Embodiment
Embodiment of the present utility model is described in detail below in conjunction with accompanying drawing, but the utility model can be by right
It is required that the multitude of different ways for limiting and covering is implemented.
As shown in figure 1, the utility model provides a kind of defrosting and refrigeration system, including the defrosting of compressor 1, evaporator water coil
Pipe 3, evaporator coil 4 and blast pressure difference switch 5.
Wherein, the outlet of compressor 1 passes through the tie point being arranged in parallel and the entrance of the second branch road and evaporator coil 4
Connection, the outlet of evaporator coil 4 is connected with the entrance of compressor 1；Tie point includes hot-gas bypass pipe 6 and evaporator water coil
Defrosting pipe 3, the outlet of compressor 1 pass sequentially through entering for hot-gas bypass pipe 6 and evaporator water coil defrosting pipe 3 and evaporator coil 4
Mouth connects, and is provided with the first control valve 7 on hot-gas bypass pipe 6, the second control valve 8 is provided with the second branch road.
The first end of blast pressure difference switch 5 is connected with evaporator air inlet wind pressure sampling mouth 2, and the of blast pressure difference switch 5
Two ends are connected with evaporator air outlet wind pressure sampling mouth 9, and blast pressure difference switch 5 is in evaporator air inlet wind pressure sampling mouth 2 with steaming
When sending out the pressure difference between device air outlet wind pressure sampling mouth 9 more than defrosting starting differential pressure, generation defrosting control signal.
The first control valve 7 of defrosting control signal triggering is switched to opening and the second control valve 8 of triggering is switched to and cut
Only state.
During work, when the blast acquired in evaporator air inlet wind pressure sampling mouth 2 and evaporator air outlet wind pressure sampling mouth 9
When pressure difference is more than set defrosting starting differential pressure, controls the first control valve 7 to open by blast pressure difference switch 5, simultaneously close off
Second control valve 8, the refrigerant gas of the hyperthermia and superheating of the now exclusion of compressor 1 enter directly into steaming by hot-gas bypass pipe 6
Device water pond defrosting pipe 3 is sent out, with the frost in heating evaporation device water pond defrosting pipe 3, removing evaporator water coil, then enters back into steaming
Send out heating evaporation device coil pipe 4 in device coil pipe 4 so that evaporator fin 15 generates heat, and is tied so as to melt the surface of evaporator fin 15
Frost, by defrosting cool down after gas-liquid mixed refrigerant come back to compressor 1 again.
When the blast pressure difference acquired in evaporator air inlet wind pressure sampling mouth 2 and evaporator air outlet wind pressure sampling mouth 9 is small
When set reset values, the first control valve 7 is closed, compressor 1 is shut down, and is delayed into evaporator water coil draining, so as to complete
Defrost and circulate into evaporator.
As can be seen here, the utility model can utilize the hyperthermia and superheating refrigerant vapour that compressor 1 is discharged, and be introduced directly into evaporation
In device water pond defrosting pipe 3 and evaporator coil 4, thermal source is produced inside evaporator water coil defrosting pipe 3 and evaporator coil 4, is made
The surface heat of evaporator fin 15 is obtained, reaches the purpose of defrosting, realizing evaporator has frost then remove, be frostless, does not go out, so as to real
The defrosting energy-saving effect of existing real meaning, there is high defrosting efficiency, simple possible small on the influence of storehouse temperature, service-strong feature.
Refrigerant gas after defrosting has part to be cooled to liquid, forms the gas-liquid mixture of refrigerant, is
Prevent liquid refrigerant from being damaged to compressor, the defrosting and refrigeration system in the utility model also includes gas-liquid separator
10, the outlet of evaporator coil 4 is connected by gas-liquid separator 10 with the entrance of compressor 1.
Preferably, the second branch road includes condenser 11, reservoir 12 and the expansion valve 13 being sequentially connected, condenser 11 and pressure
The outlet connection of contracting machine 1, expansion valve 13 are connected with the entrance of evaporator coil 4.
Preferably, the second control valve 8 is arranged between reservoir 12 and expansion valve 13.
Preferably, defrosting and refrigeration system also includes evaporator water coil 14, and water pond defrosting pipe 3 is arranged on evaporator water coil 14
Top.
The utility model additionally provides a kind of freezer, wraps the defrosting and refrigeration system stated.
Freezer defrosting control model in the utility model is controlled based on blast pressure difference, adequately achieves the evaporation of freezer
Device defrosting efficiency is high, defrosting time is short, defrosting when cold storage locker temperature is influenceed it is small, defrost good energy-conserving effect the advantages that.
Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, for this
For the technical staff in field, the utility model can have various modifications and variations.It is all in the spirit and principles of the utility model
Within, any modification, equivalent substitution and improvements made etc., it should be included within the scope of protection of the utility model.
Claims (6)
- A kind of 1. defrosting and refrigeration system, it is characterised in that including：Compressor（1）, evaporator water coil defrosting pipe（3）, evaporator plate Pipe（4）With blast pressure difference switch（5）, the compressor（1）Outlet by the tie point that is arranged in parallel and the second branch road with The evaporator coil（4）Entrance connection, the evaporator coil（4）Outlet and the compressor（1）Entrance connection；The tie point includes hot-gas bypass pipe（6）With evaporator water coil defrosting pipe（3）, the compressor（1）Outlet according to It is secondary to pass through the hot-gas bypass pipe（6）And the evaporator water coil defrosting pipe（3）With the evaporator coil（4）Entrance connect Connect, the hot-gas bypass pipe（6）On be provided with the first control valve（7）；The second control valve is provided with second branch road（8）；The blast pressure difference switch（5）First end and evaporator air inlet wind pressure sampling mouth（2）Connection, the blast pressure difference are opened Close（5）The second end and evaporator air outlet wind pressure sampling mouth（9）Connection, the blast pressure difference switch（5）In the evaporator Air inlet wind pressure sampling mouth（2）With the evaporator air outlet wind pressure sampling mouth（9）Between pressure difference be more than defrosting starting differential pressure When, generation defrosting control signal；The defrosting control signal triggers first control valve（7）It is switched to opening and triggers second control valve （8）It is switched to cut-off state.
- 2. defrosting and refrigeration system according to claim 1, it is characterised in that the defrosting and refrigeration system is also including gas-liquid point From device（10）, the evaporator coil（4）Outlet pass through the gas-liquid separator（10）With the compressor（1）Entrance connect Connect.
- 3. defrosting and refrigeration system according to claim 1, it is characterised in that second branch road is cold including being sequentially connected Condenser（11）, reservoir（12）And expansion valve（13）, the condenser（11）With the compressor（1）Outlet connection, it is described Expansion valve（13）With the evaporator coil（4）Entrance connection.
- 4. defrosting and refrigeration system according to claim 3, it is characterised in that second control valve（8）It is arranged on described Reservoir（12）With the expansion valve（13）Between.
- 5. defrosting and refrigeration system according to claim 1, it is characterised in that the defrosting and refrigeration system also includes evaporator Water pond（14）, the water pond defrosting pipe（3）It is arranged on the evaporator water coil（14）Top.
- 6. a kind of freezer, it is characterised in that including the defrosting and refrigeration system any one of claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621161064.0U CN206739692U (en) | 2016-11-01 | 2016-11-01 | A kind of defrosting and refrigeration system and freezer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621161064.0U CN206739692U (en) | 2016-11-01 | 2016-11-01 | A kind of defrosting and refrigeration system and freezer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206739692U true CN206739692U (en) | 2017-12-12 |
Family
ID=60555108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621161064.0U Active CN206739692U (en) | 2016-11-01 | 2016-11-01 | A kind of defrosting and refrigeration system and freezer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206739692U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106679253A (en) * | 2016-11-01 | 2017-05-17 | 安徽美乐柯制冷空调设备有限公司 | Defrosting and refrigerating system and cold storage |
| CN110173951A (en) * | 2019-04-30 | 2019-08-27 | 中国联合工程有限公司 | The method of hot working fluid adverse current in liquid supply pipe is prevented when a kind of air-cooler defrosting |
| WO2019221606A1 (en) * | 2018-05-15 | 2019-11-21 | Romy Clima As | Method for control of a ventilation heat pump |
| CN111536721A (en) * | 2020-05-26 | 2020-08-14 | 广东省现代农业装备研究所 | Defrosting method and device adopting medium specific enthalpy vapor-liquid mixture refrigerant |
| CN111536719A (en) * | 2020-05-26 | 2020-08-14 | 广东省现代农业装备研究所 | Defrosting method and device adopting defrosted refrigerant to directly spray liquid for evaporation |
-
2016
- 2016-11-01 CN CN201621161064.0U patent/CN206739692U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106679253A (en) * | 2016-11-01 | 2017-05-17 | 安徽美乐柯制冷空调设备有限公司 | Defrosting and refrigerating system and cold storage |
| WO2019221606A1 (en) * | 2018-05-15 | 2019-11-21 | Romy Clima As | Method for control of a ventilation heat pump |
| CN110173951A (en) * | 2019-04-30 | 2019-08-27 | 中国联合工程有限公司 | The method of hot working fluid adverse current in liquid supply pipe is prevented when a kind of air-cooler defrosting |
| CN110173951B (en) * | 2019-04-30 | 2021-01-19 | 中国联合工程有限公司 | Method for preventing hot working medium from flowing reversely in liquid supply pipe during defrosting of air cooler |
| CN111536721A (en) * | 2020-05-26 | 2020-08-14 | 广东省现代农业装备研究所 | Defrosting method and device adopting medium specific enthalpy vapor-liquid mixture refrigerant |
| CN111536719A (en) * | 2020-05-26 | 2020-08-14 | 广东省现代农业装备研究所 | Defrosting method and device adopting defrosted refrigerant to directly spray liquid for evaporation |
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