CN208832629U

CN208832629U - A kind of low-temperature cold water unit

Info

Publication number: CN208832629U
Application number: CN201821273131.7U
Authority: CN
Inventors: 董学勇
Original assignee: Guangdong Eurasia Refrigeration Equipment Manufacturing Co Ltd
Current assignee: Guangdong Eurasia Refrigeration Equipment Manufacturing Co Ltd
Priority date: 2018-08-08
Filing date: 2018-08-08
Publication date: 2019-05-07
Anticipated expiration: 2028-08-08

Abstract

The utility model relates to a kind of water coolers, more particularly to a kind of low-temperature cold water unit, main includes passing through the sequentially connected compressor of pipeline, oil eliminator, evaporative condenser, expansion valve and evaporator, to be formed into a loop, the oil discharge outlet of the oil eliminator and the oil return opening of compressor connect the air entry of the outlet connect compressor of the evaporator.The utility model has the advantage that 1, realizes steady operation under low ambient temperature, prevents bursting by freezing heat exchanger；2, system is without configuring cooling water pump, cooling tower and pipeline, effectively shortens the system construction period；3, delay fouling of heat exchangers, heat exchange efficiency is avoided to decline；4, it saves water；5, condensation temperature is reduced, unit efficiency is improved.

Description

A kind of low-temperature cold water unit

Technical field

The utility model relates to a kind of water cooler more particularly to a kind of low-temperature cold water units.

Background technique

Water-cooled low-temperature cold water unit becomes the low temperature of mainstream currently on the market because its efficiency is high, stable feature Water cooler, but in northern area winter operation, during shutting down frequent occurrence the phenomenon that heat exchanger bursting by freezing, cause unnecessary Loss；On the other hand, after long-play, shell and tube condenser the problems such as there is foulings, unit refrigerating capacity is caused to decline rapidly Subtract or irregular operation.

Utility model content

In view of the deficienciess of the prior art, the purpose of this utility model is to provide a kind of reduction condensation temperature, improving The low-temperature cold water unit of efficiency.

To achieve the above object, the utility model can be achieved by the following technical programs:

A kind of low-temperature cold water unit, including by the sequentially connected compressor of pipeline, oil eliminator, evaporative condenser, Expansion valve and evaporator, the air entry of the outlet connect compressor of the evaporator is to be formed into a loop, the row of the oil eliminator The connection of the oil return opening of hydraulic fluid port and compressor.

Further, liquid storage device, device for drying and filtering and warp are connected between the evaporative condenser and expansion valve in turn Help device, the outlet of the device for drying and filtering, which separates, is divided into main hydraulic pipe branch and economizer branch, main hydraulic pipe branch directly with economy The T1 import of device connects, and economizer branch passes sequentially through the T3 import after economizer solenoid valve and economizer expansion valve with economizer The outlet T2 of connection, the economizer is connect with expansion valve import, and the outlet of expansion valve and the import of evaporator connect, the warp The outlet T4 of Ji device is connect with the economizer entrance of compressor.

Further, shut-off valve is connected between the evaporative condenser and liquid storage device.

Further, shut-off valve is connected between the liquid storage device and device for drying and filtering.

Further, it is connected with oil circuit cut-off between the oil discharge outlet of the oil eliminator and the oil return opening of compressor in turn Valve, oil strainer and solenoid valve.

Further, the compressor be rolling rotor-type, vortex, piston type, screw compressor it is any.

Further, the compressor is the compressor that single stage compress, Two-stage Compression or three-level or more are compressed.

Further, the evaporator is dry type, full-liquid type, falling film type, any evaporator for rising membrane type, hydrocone type.

Further, the expansion valve is heating power expansion valve or electric expansion valve.

Further, used refrigerant be freon, ammonia or natural refrigerant it is one of or wherein any Two or three of mixture.

Compared with prior art, the utility model has the advantage that

1, it realizes steady operation under low ambient temperature, prevents bursting by freezing heat exchanger；

2, system is without configuring cooling water pump, cooling tower and pipeline, effectively shortens the system construction period；

3, delay fouling of heat exchangers, heat exchange efficiency is avoided to decline；

4, it saves water；

5, condensation temperature is reduced, unit efficiency is improved.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

In figure: 1, compressor；2, oil eliminator；3, evaporative condenser；4, liquid storage device；5, economizer；6, expansion valve；7, Evaporator；8, oil circuit shut-off valve；9, oil strainer；10, solenoid valve；11, shut-off valve；12, device for drying and filtering；13, economizer electricity Magnet valve；14, economizer expansion valve.

Specific embodiment

The utility model is further described below in conjunction with attached drawing and specific embodiment:

As shown in Figure 1, low-temperature cold water unit described in the utility model, including by the sequentially connected compressor 1 of pipeline, Oil eliminator 2, evaporative condenser 3, expansion valve 6 and evaporator 7, the air entry of the outlet connect compressor 1 of evaporator 7 is with shape At circuit, the oil discharge outlet of oil eliminator 2 is connect with the oil return opening of compressor 1, the oil discharge outlet of oil eliminator 2 and returning for compressor 1 It is connected with oil circuit shut-off valve 8, oil strainer 9 and solenoid valve 10 between hydraulic fluid port in turn.

It is connected with liquid storage device 4, device for drying and filtering 12 and economizer 5 between evaporative condenser 3 and expansion valve 6 in turn, does The outlet of dry filter 12, which separates, is divided into 5 branch of main hydraulic pipe branch and economizer, main hydraulic pipe branch directly with the T1 of economizer 5 into Mouthful connection, 5 branch of economizer, which passes sequentially through, to be connected with the T3 import of economizer 5 after economizer solenoid valve 13 and economizer expansion valve 14 It connects, the outlet T2 of economizer 5 is connect with 6 import of expansion valve, and the outlet of expansion valve 6 is connect with the import of evaporator 7, economizer 5 T4 outlet connect with the economizer entrance of compressor 1.It is connected with shut-off valve 11 between evaporative condenser 3 and liquid storage device 4, stores up Shut-off valve 11 is connected between liquid device 4 and device for drying and filtering 12.

Compressor 1 be rolling rotor-type, vortex, piston type, screw compressor 1 it is any.Compressor 1 is single-stage The compressor 1 more than compression, Two-stage Compression or three-level compressed.

Evaporator 7 is dry type, full-liquid type, falling film type, any evaporator 7 for rising membrane type, hydrocone type.

Expansion valve 6 is heating power expansion valve 6 or electric expansion valve 6.

Used refrigerant is freon, ammonia or natural refrigerant, or in freon, ammonia or natural refrigerant Any two or three of mixture.

Unit described in the utility model can be monoblock type, or split type.

The working principle of the utility model is:

The refrigerant gas of low-temp low-pressure is compressed to the steam of high temperature and pressure in compressor 1, after the discharge of compressor 1 Into oil eliminator 2, after Oil-gas Separation, the refrigerant vapour of high temperature and pressure enters evaporative condenser 3, in evaporating type condensing It is cooled in device 3 and is condensed into highly pressurised liquid, then the throttling of expanded valve 6 is at low-temp low-pressure liquid refrigerant, the liquid of low-temp low-pressure Refrigerant absorbs heat in the evaporator 7 and is gasificated into low-pressure steam, so just completes a refrigeration cycle.Evaporative condenser 3 is attached With feeding spraying pump and cooling fan, pressure sensor is set on pressure duct, by monitoring high-pressure numerical value, judges to make Cooling system operating condition, controller is according to preset logic, to control evaporative condenser feeding spraying pump and cooling fan Start and stop or revolving speed, to make refrigeration system stable operation in efficient section.

Evaporative condenser carries out heat exchange by the high temperature liquid refrigerant in cooling medium and heat exchanger tube of water and air, Refrigerant is condensed into liquid by gaseous state.Inside setting water distribution system, condenser coil group, filler heat exchange layers, dehydrater etc..Outside Portion's setting water circulating pump, electronic water descaler, coil pipe group side top set axial flow blower.It is internal under the action of axial flow blower At negative pressure state.When work, cooling water is equably completely covered on coil surface under powerful wind-force by water distribution system, high Warm gaseous refrigerant enters from coil pipe top, and the liquid refrigerant being condensed is flowed out from coil pipe bottom, in this process, high temperature system Water, air outside cryogen and coil pipe carry out heat exchange, then by wind, heat transfer effect is significantly improved.Cooling water and air heat absorption Temperature sharply increases afterwards, and the cooling water formation vapor in part, evaporation is taken away a large amount of heat and siphoned away by blower and is discharged into greatly Gas, at the same the moisture in hot-air by dehydrater by the end of in collecting-tank, flow into filler heat without vaporized high-temperature cooling water The air that switching layer is flowed through is taken away heat and is allowed to cool, and the cooling water after being cooled sufficiently flows back in collecting-tank for circulating pump weight New water distribution system of being sent into continues cycling through work.The moisture being lost in atmosphere controls water level by the ball-cock assembly in collecting-tank, gives It gives and being replenished in time.

For those skilled in the art, it is various corresponding that other can be made according to above technical scheme and design Change and deformation, and all these change and modification all should belong to the utility model claims protection scope it It is interior.

Claims

1. a kind of low-temperature cold water unit, it is characterised in that: including passing through the sequentially connected compressor of pipeline, oil eliminator, evaporation Formula condenser, expansion valve and evaporator, the air entry of the outlet connect compressor of the evaporator is to be formed into a loop, the oil The oil return opening of oil discharge outlet and compressor from device connects.

2. low-temperature cold water unit according to claim 1, it is characterised in that: between the evaporative condenser and expansion valve Be connected with liquid storage device, device for drying and filtering and economizer in turn, the outlet of the device for drying and filtering separate be divided into main hydraulic pipe branch and The T1 import of economizer branch, main hydraulic pipe branch and economizer connects, and economizer branch passes sequentially through economizer solenoid valve and warp It is connect after Ji device expansion valve with the T3 import of economizer, the outlet T2 of the economizer is connect with expansion valve import, expansion valve Outlet is connect with the import of evaporator, and the outlet T4 of the economizer is connect with the economizer entrance of compressor.

3. low-temperature cold water unit according to claim 2, it is characterised in that: between the evaporative condenser and liquid storage device It is connected with shut-off valve.

4. low-temperature cold water unit according to claim 2 or 3, it is characterised in that: the liquid storage device and device for drying and filtering it Between be connected with shut-off valve.

5. low-temperature cold water unit according to claim 1 or 2, it is characterised in that: the oil discharge outlet and pressure of the oil eliminator It is connected with oil circuit shut-off valve, oil strainer and solenoid valve between the oil return opening of contracting machine in turn.

6. low-temperature cold water unit according to claim 1, it is characterised in that: the compressor is rolling rotor-type, is vortexed Formula, piston type, screw compressor it is any.

7. low-temperature cold water unit according to claim 1 or 6, it is characterised in that: the compressor is single stage compress, twin-stage The compressor more than compression or three-level compressed.

8. low-temperature cold water unit according to claim 1, it is characterised in that: the evaporator is dry type, full-liquid type, falling liquid film Formula, any evaporator for rising membrane type, hydrocone type.

9. low-temperature cold water unit according to claim 1, it is characterised in that: the expansion valve is heating power expansion valve or electronics Expansion valve.

10. low-temperature cold water unit according to claim 1, it is characterised in that: used refrigerant be freon, ammonia or Person's natural refrigerant one of or wherein any two or three of mixture.