CN208431972U - Air-prevention enters the screw compressor refrigerating unit of system under a kind of low-temperature condition - Google Patents
Air-prevention enters the screw compressor refrigerating unit of system under a kind of low-temperature condition Download PDFInfo
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- CN208431972U CN208431972U CN201820956912.XU CN201820956912U CN208431972U CN 208431972 U CN208431972 U CN 208431972U CN 201820956912 U CN201820956912 U CN 201820956912U CN 208431972 U CN208431972 U CN 208431972U
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- heat exchanger
- electric heating
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- heating sheets
- air
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Abstract
Air-prevention enters the screw compressor refrigerating unit of system under a kind of low-temperature condition, it is characterized by: the screw compressor refrigerating unit includes refrigeration part and the pipeline that is connected between each refrigeration part, the refrigeration part includes finned type heat exchanger, compressor, evaporator, plate heat exchanger, device for drying and filtering and economizer；Shut-off valve is fixed in the inlet and outlet of the finned type heat exchanger；It is equipped with heat tape or electric heating sheets on the shell of the shell of the compressor, the shell of evaporator and plate heat exchanger, heat tape or electric heating sheets are coated on the pipeline.The refrigeration unit of the utility model will not enter air in -20 DEG C of low temperature environments below because of negative pressure at flange sealing surface and seal with screwed joint face, and ensure that can work normally in extremely cold external working environment, will not break down.
Description
Technical field
The utility model relates to field of refrigeration equipments, and in particular to air-prevention enters the screw rod of system under a kind of low-temperature condition
Formula refrigeration unit.
Background technique
Natural cooling screw compressor refrigerating unit is a kind of large-scale refrigeration equipment, it include finned type heat exchanger, compressor,
Evaporator, plate heat exchanger and the copper pipe for being connected to each component.When the ambient temperature of its work is at -20 DEG C or more,
The internal system of natural cooling screw compressor refrigerating unit is positive pressure.But in winter in the north, ambient temperature usually can be -20
DEG C hereinafter, when unit deactivates, refrigeration system is in negative pressure state, at this point, there are outside airs especially in a low temperature of -40 DEG C
It is inhaled into the risk of system, and then influences the normal use of refrigeration unit.
Summary of the invention
The utility model provides the screw compressor refrigerating unit that air-prevention under a kind of low-temperature condition enters system, its object is to
Current refrigeration unit is solved to be easy to inhale at flange sealing surface and seal with screwed joint face in -20 DEG C of low temperature environments below
The problem of entering outside air.
In order to achieve the above objectives, the technical solution adopted in the utility model is: a kind of natural cooling screw compressor refrigerating unit,
The refrigeration unit includes refrigeration part and the pipeline that is connected between each refrigeration part, and the refrigeration part includes that finned heat is handed over
Parallel operation, compressor, evaporator, plate heat exchanger, device for drying and filtering and economizer；In the import of the finned type heat exchanger
Shut-off valve is fixed with exit；On the shell of the shell of the compressor, the shell of evaporator and plate heat exchanger
Heat tape or electric heating sheets are equipped with, heat tape or electric heating sheets are coated on the pipeline.
Related content in above-mentioned technical proposal is explained as follows:
1, in above scheme, the shut-off valve is electrical ball valve.
2, in above scheme, between the shut-off valve and the device for drying and filtering in the finned type heat exchanger exit
It is coated with heat tape or electric heating sheets on pipeline, is coated with heat tape on the pipeline between the economizer and evaporator
Or electric heating sheets, heat tape or electric heating sheets are coated on the pipeline between the evaporator and compressor.
3, in above scheme, the heat tape adds suitable for the tank of various industrial equipments, pipe, slot and other containers
Heat, heat preservation, it is mainly made of thermo electric material and insulating materials etc., and outermost layer is heat-proof silica gel, and thermo electric material is nickel chromium triangle
Alloy strip has the features such as fever is fast, and the thermal efficiency is high, long service life, and insulating materials is multilayer alkali-free glass fibre, has good
Good heat resistance and reliable insulation performance.Its structurally flexible, when use, which can be directly wound in, to be heated the surface at position and adds
Heat.The electric heating sheets are pasted onto electric heating wire between two layers of aluminium foil, and bottom aluminium foil back side band adhesive sticker adds not sticky paper.This
Heat tape and electric heating sheets in utility model are type and structure common in the art, can be easy to from the market
It buys.Thermal insulation material is coated on the heat tape or electric heating sheets.
The utility model compared with prior art, has the advantage, that
(1) because in system refrigerant it is more, electrical heating power is unable to satisfy whole refrigerant temperature requirements, therefore, the utility model
It is welded with shut-off valve in the inlet and outlet of heat exchanger, for sealing, shut-off valve is closed when unit deactivates, it is ensured that
System does not enter air under negative pressure state；
(2) increase heat tape or electric heating sheets at the pipeline risk point outside heat exchanger to keep the temperature, work as unit
When deactivating, selects the electric heating of appropriate power that refrigerant temperature in pipeline is made to be above the boiling point, increase refrigerant pressure, thus flange,
Thread seal face is not because negative pressure enters air.
In short, the refrigeration unit of the utility model will not be close in flange because of negative pressure in -20 DEG C of low temperature environments below
Cover and seal with screwed joint face place enter air, and ensure that can work normally in extremely cold external working environment, Bu Huifa
Raw failure.
Detailed description of the invention
Attached drawing 1 is the structural schematic diagram of the utility model.
In the figures above: 1, pipeline；2, finned type heat exchanger；3, compressor；4, evaporator；5, plate heat exchanger；6,
Device for drying and filtering；7, economizer；8, shut-off valve；9, heat tape.
Specific embodiment
The utility model is further described with reference to the accompanying drawings and embodiments:
A kind of embodiment: natural cooling screw compressor refrigerating unit
Referring to figure 1, which includes refrigeration part and the pipeline being connected between each refrigeration part 1, pipe
Road 1 is actually copper pipe, the refrigeration part include finned type heat exchanger 2, compressor 3, evaporator 4, plate heat exchanger 5,
Device for drying and filtering 6 and economizer plate change 7；Shut-off valve is fixed in the inlet and outlet of the finned type heat exchanger 2
8, shut-off valve 8 is zero leakage electrical ball valve；In the shell of the compressor 3, the shell of evaporator 4 and plate heat exchanger 5
It is equipped with heat tape 9 or electric heating sheets on shell, is coated with heat tape 9 or electric heating sheets on the pipeline 1.
Pipeline specifically between the shut-off valve 8 and the device for drying and filtering 6 in 2 exit of finned type heat exchanger
It is coated with heat tape 9 or electric heating sheets on 1, is coated with electric heating on the pipeline 1 between the economizer 7 and evaporator 4
Band 9 or electric heating sheets are coated with heat tape 9 or electric heating sheets on the pipeline 1 between the evaporator 4 and compressor 3.
In the outside of finned type heat exchanger 2, changed on 7, evaporator 4 and connecting line 1 in compressor 3, economizer plate,
Heat tape 9 or electric heating sheets are wound, after being wound on heat tape 9 or electric heating sheets with aluminium foil, then coat thermal insulation material, with
Guarantee that 1 inner refrigerant temperature of pipeline is greater than -26 DEG C, i.e. pressure is greater than 0Pa, and system is avoided to enter air.In the finned heat
The inlet and outlet of exchanger 2 is fixed with shut-off valve 8, and shut-off valve 8 is zero leakage electrical ball valve, the closing when unit deactivates
Shut-off valve, it is ensured that system does not enter air under negative pressure state.
The above embodiments are only for explaining the technical ideas and features of the present invention, and its object is to allow be familiar with technique
Personage can understand the content of the utility model and implement accordingly, do not limit the protection scope of the present invention.
All equivalent change or modifications according to made by the spirit of the present invention essence, should all cover the protection scope of the utility model it
It is interior.
Claims (4)
1. air-prevention enters the screw compressor refrigerating unit of system under a kind of low-temperature condition, it is characterised in that: the screw refrigerator
Group includes refrigeration part and the pipeline being connected between each refrigeration part, and the refrigeration part includes finned type heat exchanger, pressure
Contracting machine, evaporator, plate heat exchanger, device for drying and filtering and economizer；In the inlet and outlet of the finned type heat exchanger
Place is fixed with shut-off valve；It is equipped on the shell of the shell of the compressor, the shell of evaporator and plate heat exchanger
Heat tape or electric heating sheets are coated with heat tape or electric heating sheets on the pipeline.
2. air-prevention enters the screw compressor refrigerating unit of system, feature under a kind of low-temperature condition according to claim 1
Be: the shut-off valve is electrical ball valve.
3. air-prevention enters the screw compressor refrigerating unit of system, feature under a kind of low-temperature condition according to claim 1
It is: is coated with electricity on the pipeline between the shut-off valve and the device for drying and filtering in the finned type heat exchanger exit and adds
The torrid zone or electric heating sheets are coated with heat tape or electric heating sheets on the pipeline between the economizer and evaporator, in institute
It states and is coated with heat tape or electric heating sheets on the pipeline between evaporator and compressor.
4. air-prevention enters the screw compressor refrigerating unit of system, feature under a kind of low-temperature condition according to claim 1
It is: is coated with thermal insulation material on the heat tape or electric heating sheets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820956912.XU CN208431972U (en) | 2018-06-21 | 2018-06-21 | Air-prevention enters the screw compressor refrigerating unit of system under a kind of low-temperature condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820956912.XU CN208431972U (en) | 2018-06-21 | 2018-06-21 | Air-prevention enters the screw compressor refrigerating unit of system under a kind of low-temperature condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208431972U true CN208431972U (en) | 2019-01-25 |
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ID=65100793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820956912.XU Active CN208431972U (en) | 2018-06-21 | 2018-06-21 | Air-prevention enters the screw compressor refrigerating unit of system under a kind of low-temperature condition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208431972U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111102687A (en) * | 2019-12-18 | 2020-05-05 | 珠海格力电器股份有限公司 | Pressure control device and method for keeping positive pressure of unit and air conditioning equipment |
-
2018
- 2018-06-21 CN CN201820956912.XU patent/CN208431972U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111102687A (en) * | 2019-12-18 | 2020-05-05 | 珠海格力电器股份有限公司 | Pressure control device and method for keeping positive pressure of unit and air conditioning equipment |
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