CN214009609U - Double-heat-source low-temperature parallel unit - Google Patents
Double-heat-source low-temperature parallel unit Download PDFInfo
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- CN214009609U CN214009609U CN202023167457.1U CN202023167457U CN214009609U CN 214009609 U CN214009609 U CN 214009609U CN 202023167457 U CN202023167457 U CN 202023167457U CN 214009609 U CN214009609 U CN 214009609U
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Abstract
The utility model discloses a double-heat source low-temperature parallel unit, which comprises a compressor unit, an oil separator, a liquid storage device, an evaporator, an oil cooling plate exchanger and an economizer; the high-pressure air pipe of the compressor unit is connected with the oil separator, the air return pipe is connected with the economizer, the output end of an oil pipe of the oil separator is connected with the compressor unit, and the output end of an exhaust pipe is connected with the liquid-gas mixer; one path of a main liquid supply pipe of the economizer is connected to a liquid supply main pipe, and the other path of the main liquid supply pipe of the economizer is connected to a storehouse liquid supply pipe; one path of the pipeline of the liquid-gas mixer is connected to an air suction pipeline of the compressor unit, the other path of the pipeline is connected to an air outlet of a hot gas bypass valve for high-pressure exhaust, and the other path of the pipeline is connected with a liquid pipe section from high-pressure liquid after throttling and pressure reduction; one path of an oil pipe outlet end of the oil separator is connected to the oil cooling plate exchanger, the other path of bypass is connected to an oil return pipe of the compressor unit, a liquid supply pipe of the oil cooling plate exchanger enters downwards, and the outlet end of the oil pipe outlet end of the oil separator is connected to the siphon tank; the output end of the liquid supply pipe of the liquid supply device is connected to the economizer. The utility model has the advantages of convenient and automatic control of hot fluorine defrosting.
Description
Technical Field
The utility model belongs to the technical field of the refrigeration, concretely relates to parallelly connected unit of two heat source low temperatures.
Background
Generally, the defrosting mode of an air cooler in a refrigeration house is as follows: electrothermal defrosting, water-flushing defrosting and hot working medium defrosting. (1) Electric heating defrosting: the electric heating defrosting is to heat the fins by using electric heating pipes arranged in the air cooler to melt the frost layer. The method is simple in system and more convenient to operate, but the air cooler is provided with 40-100W electric heating pipes per square heat exchange area, so that the power consumption is too large, the influence on the fluctuation of the storage temperature is great, and the energy is not saved; the defrosting electric heating pipe has high power, the heating pipe has poor quality or is used for a long time, the heating pipe is easy to burn out and even causes fire, and the electric heating defrosting has serious hidden trouble. (2) Water defrosting: the water defrosting is a method of spraying water to the outer surface of an evaporator by using a water pump or a water spraying device to melt and flush a frost layer by the heat of the water. The water defrosting method is simple in operation and short in time, and is a very useful defrosting method. In a cold storage with low temperature, the water temperature is too low after repeated defrosting, and the defrosting effect is influenced; if the frost is not washed clean within the set time, the frost layer may become an ice layer after the air cooler works normally, so that the next defrosting is more difficult. (3) Defrosting of hot working medium: the hot working medium defrosting is that the superheated refrigerant vapor with higher temperature discharged by a compressor passes through an oil separator and then enters an evaporator, the evaporator is temporarily used as a condenser, and the frost layer on the surface of the evaporator is melted by the heat released by the hot working medium during condensation. Meanwhile, the refrigerant and the lubricating oil which are originally stored in the evaporator are discharged into a defrosting liquid discharge barrel or a low-pressure circulating barrel by means of hot working medium pressurization or gravity. When the hot gas defrosting is carried out, the load of the condenser is reduced, and partial electric energy can be saved during the operation of the condenser. The hot working medium defrosting is widely adopted in the traditional refrigeration system with ammonia as a refrigerant, the technology is mature, but the hot ammonia defrosting is generally operated manually, the automation degree is low, and the defrosting effect is uncertain. The hot fluorine defrosting can be realized automatically, but a liquid discharge barrel is generally required to be added, the investment of system equipment is increased, the system is complex, and the realization control difficulty is high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a parallelly connected unit of two heat sources low temperature to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a double-heat-source low-temperature parallel unit comprises a compressor unit, an oil separator, a liquid reservoir, an evaporator and an oil cooling plate exchanger and an economizer;
the high-pressure air pipe of the compressor unit is connected with the oil separator, the air return pipe is connected with the economizer, the output end of an oil pipe of the oil separator is connected with the compressor unit, and the output end of the exhaust pipe is connected with the liquid-gas mixer;
one path of a main liquid supply pipe of the economizer is connected to a liquid supply main pipe, and the other path of the main liquid supply pipe of the economizer is connected to a storehouse liquid supply pipe;
the first path of the pipeline of the liquid-gas mixer is connected to an air suction pipeline of the compressor unit, and the second path of the pipeline is connected to an air outlet of a hot gas bypass valve for exhausting air at high pressure; the third path is connected with a liquid pipe section after the high-pressure liquid is subjected to throttling and pressure reduction;
one path of an oil pipe outlet end of the oil separator is connected to an oil cooling plate exchanger, the other path of bypass is connected to an oil return pipe of the compressor unit, a liquid supply pipe of the oil cooling plate exchanger enters downwards, and an outlet end of the oil pipe outlet end of the oil separator is connected to a siphon tank; and the output end of a liquid supply pipe of the liquid supply device is connected to the economizer.
The utility model discloses a further improvement lies in: the compressor unit is formed by connecting two compressors in parallel.
The utility model discloses a further improvement lies in: and a suction filter barrel is arranged on a suction pipeline between the compressor and the liquid-gas mixer.
The utility model discloses a further improvement lies in: an oil filter barrel is arranged on a liquid supply pipe between the oil separator and the oil cooling plate.
The utility model discloses a further improvement lies in: an electromagnetic valve and an energy regulator are arranged on the exhaust pipe between the oil separator and the liquid-gas mixer.
The utility model discloses a technological effect and advantage:
this structure advantage: after the high-pressure superheated refrigerant gas passes through the oil separator, a pressure regulating valve is added on the main exhaust pipeline. Before the valve, a branch is connected with a defrosting pipeline, and the defrosting pipeline is connected to an air cooler in the warehouse through a defrosting electromagnetic valve after heat preservation; during defrosting, the refrigerant return liquid after defrosting by the air cooler is connected to the exhaust manifold behind the pressure regulating valve, and the pressure regulating valve can regulate the front-back pressure difference of the valve and is controlled to be opened and closed by the electromagnetic valve. When the valve operates normally, the valve is electrified and opened, and no pressure difference exists between the front and the rear of the valve; when defrosting, the control electromagnetic valve of the valve is powered off, and about 3Bar differential pressure is generated before and after the valve, which is the defrosting working pressure. The defrosting scheme is a heat pump working principle in operation, and has an obvious energy-saving effect.
Has the advantages that: simple structure, convenient control, high automation degree and energy conservation.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
in the figure: 1 compressor, 2 oil separators, 3 liquid reservoirs, 4 evaporators, 5 oil-cold plate exchangers, 6 economizers, 7 liquid-gas mixers, 8 air suction filter barrels, 9 oil filter barrels, 10 electromagnetic valves and 11 energy regulators.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Fig. 1 shows a specific embodiment of a dual-heat-source low-temperature parallel unit: the system comprises a compressor unit, an oil separator 2, a liquid storage device 3, an evaporator 4, an oil cooling plate exchanger 5 and an economizer 6; a high-pressure air pipe of the compressor unit is connected with the oil separator 2, an air return pipe is connected to the economizer 6, an oil pipe output end of the oil separator 2 is connected to the compressor unit, and an exhaust pipe output end is connected to the liquid-gas mixer 7; one path of a main liquid supply pipe of the economizer 6 is connected to a liquid supply main pipe, and the other path of the main liquid supply pipe is connected to a storehouse liquid supply pipe; the first path of the pipeline of the liquid-gas mixer 7 is connected to an air suction pipeline of the compressor unit, and the second path of the pipeline is connected to an air outlet of a hot gas bypass valve for exhausting air at high pressure; the third path is connected with a liquid pipe section after the high-pressure liquid is subjected to throttling and pressure reduction; one path of an outlet end of an oil pipe of the oil separator 2 is connected to an oil cooling plate exchanger 5, the other path of a bypass is connected to an oil return pipe of the compressor unit, a liquid supply pipe of the oil cooling plate exchanger 5 enters downwards, and the outlet end of the oil pipe is connected to a siphon tank; the output end of the liquid supply pipe of the liquid supply device 3 is connected to an economizer 6;
an air suction filter barrel 8 is arranged on an air suction pipeline between the compressor 1 and the liquid-gas mixer 7;
an oil filter barrel 9 is arranged on a liquid supply pipe between the oil separator 2 and the oil cooling plate 5;
an electromagnetic valve 10 and an energy regulator 11 are mounted on the exhaust pipe between the oil separator 2 and the liquid-gas mixer 7.
The working principle and the process are as follows: see the schematic diagram of the system in detail.
1. During defrosting, high-pressure steam enters the evaporator in the warehouse after passing through the oil separator, absorbs the frost heat of the surface layer of the evaporator and is liquefied (the refrigerant emits heat); meanwhile, the frost absorbs the heat of the refrigerant to melt through the heat conduction of the finned tubes, and the defrosted water flows into the water pan and is guided out of the warehouse by the drain pipe.
2. Under the action of the pressure difference of the refrigerant liquefied in the evaporator, the refrigerant flows back to the high-pressure exhaust pipe behind the regulating valve and is mixed with the superheated steam flowing out of the regulating valve, and as the flow of the defrosted liquid is far smaller than the displacement of the compressor unit (one or more evaporators are defrosted and the compressor is used for loading and conveying most of cold air coolers of the whole refrigeration house), the mixed liquid is still superheated steam and enters the condenser.
3. When the system is designed, other pipeline valves are also assisted to complete the heating process cycle of defrosting; and performing work switching: and (4) normal temperature reduction and defrosting operation conversion of the evaporator.
The applicant further states that the present invention is described by the above embodiments, but the present invention is not limited to the above embodiments, i.e. the present invention is not limited to the above embodiments, and the present invention can be implemented only by relying on the above methods and structures. It should be clear to those skilled in the art that any improvement of the present invention is to the present invention, and the addition of the equivalent replacement of the implementation method and the steps, the selection of the specific mode, etc. all fall within the protection scope and the disclosure scope of the present invention.
The utility model discloses not limited to above-mentioned embodiment, all adopt and the utility model discloses similar structure and method realize the utility model discloses all modes of purpose all are within the protection scope of the utility model.
Claims (5)
1. A double-heat-source low-temperature parallel unit is characterized in that: comprises a compressor unit, an oil separator (2), a liquid reservoir (3), an evaporator (4), an oil cooling plate exchanger (5) and an economizer (6);
a high-pressure air pipe of the compressor unit is connected with the oil separator (2), an air return pipe is connected to the economizer (6), an oil pipe output end of the oil separator (2) is connected to the compressor unit, and an exhaust pipe output end is connected to the liquid-gas mixer (7);
one path of a main liquid supply pipe of the economizer (6) is connected to a liquid supply main pipe, and the other path of the main liquid supply pipe is connected to a storehouse liquid supply pipe;
the first path of the pipeline of the liquid-gas mixer (7) is connected to an air suction pipeline of a compressor unit, and the second path of the pipeline is connected to an air outlet of a hot gas bypass valve for exhausting air from a high pressure; the third path is connected with a liquid pipe section after the high-pressure liquid is subjected to throttling and pressure reduction;
one path of an outlet end of an oil pipe of the oil separator (2) is connected to an oil cooling plate exchanger (5), the other path of bypass is connected to an oil return pipe of the compressor unit, a liquid supply pipe of the oil cooling plate exchanger (5) enters downwards, and an outlet end of the oil pipe is connected to a siphon tank; the liquid supply pipe output end of the liquid storage device (3) is connected to the economizer (6).
2. The dual-heat-source low-temperature parallel unit as claimed in claim 1, wherein: the compressor unit is formed by connecting two compressors (1) in parallel.
3. The dual-heat-source low-temperature parallel unit as claimed in claim 2, wherein: and an air suction filter barrel (8) is arranged on an air suction pipeline between the compressor (1) and the liquid-gas mixer (7).
4. The dual-heat-source low-temperature parallel unit as claimed in claim 1, wherein: an oil filter barrel (9) is arranged on a liquid supply pipe between the oil separator (2) and the oil cooling plate exchanger (5).
5. The dual-heat-source low-temperature parallel unit as claimed in claim 1, wherein: an electromagnetic valve (10) and an energy regulator (11) are arranged on an exhaust pipe between the oil separator (2) and the liquid-gas mixer (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023167457.1U CN214009609U (en) | 2020-12-24 | 2020-12-24 | Double-heat-source low-temperature parallel unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023167457.1U CN214009609U (en) | 2020-12-24 | 2020-12-24 | Double-heat-source low-temperature parallel unit |
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| Publication Number | Publication Date |
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| CN214009609U true CN214009609U (en) | 2021-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023167457.1U Active CN214009609U (en) | 2020-12-24 | 2020-12-24 | Double-heat-source low-temperature parallel unit |
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| CN (1) | CN214009609U (en) |
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2020
- 2020-12-24 CN CN202023167457.1U patent/CN214009609U/en active Active
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