CN215983335U - Oil return heat recovery heating device of low-temperature refrigeration system - Google Patents
Oil return heat recovery heating device of low-temperature refrigeration system Download PDFInfo
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- CN215983335U CN215983335U CN202122286477.9U CN202122286477U CN215983335U CN 215983335 U CN215983335 U CN 215983335U CN 202122286477 U CN202122286477 U CN 202122286477U CN 215983335 U CN215983335 U CN 215983335U
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Abstract
A return oil heat recovery heating device of a low-temperature refrigeration system belongs to the technical field of refrigeration systems. The method is characterized in that: the inlet of the compressor (1) is communicated with the top of the refrigerant storage tank (8), the outlet of the compressor (1) is connected with the condenser (4) in series and then is communicated with the shell pass inlet of the oil heater (7), the shell pass outlet of the oil heater (7) is communicated with the inlet of the economizer (6), the gas outlet of the economizer (6) is communicated with the inlet of the compressor (1), the liquid outlet of the economizer (6) is communicated with the middle part or the lower part of the refrigerant storage tank (8), the tube pass inlet of the oil heater (7) is communicated with the middle part of the refrigerant storage tank (8), and the tube pass outlet of the oil heater (7) is communicated with the inlet of the compressor (1). The utility model saves the power consumption of lubricating oil heating, and reduces the operation cost of the return oil heat recovery heating device of the low-temperature refrigeration system after the high-pressure refrigerant heats the lubricating oil.
Description
Technical Field
A return oil heat recovery heating device of a low-temperature refrigeration system belongs to the technical field of refrigeration systems.
Background
In a refrigeration system, a compressor is used to compress a vapor at a lower pressure into a vapor at a higher pressure, which decreases the volume of the vapor and increases the pressure. The compressor sucks working medium steam with lower pressure from the evaporator, the working medium steam with lower pressure is sent into the condenser after the pressure of the working medium steam is increased, the working medium steam is condensed into liquid with higher pressure in the condenser, the liquid with lower pressure is sent into the evaporator after the liquid is throttled by the throttle valve, the liquid is evaporated by absorbing heat in the evaporator to form steam with lower pressure, and the steam is sent into an inlet of the compressor, so that the refrigeration cycle is completed.
When a refrigeration system works, lubricating oil is required to be sent into a compressor, the lubricating oil is usually stored in a refrigerant storage tank together with a refrigerant, the temperature of the lubricating oil in the refrigerant storage tank is usually-40 ℃, the temperature of the lubricating oil is too low to be directly sent into the compressor, at present, an electric heating tube is usually adopted to heat the lubricating oil, and then the heated lubricating oil is sent into the compressor, so that the power consumption is increased, and the running cost of equipment is further increased.
Disclosure of Invention
The technical problem to be solved by the utility model is as follows: the return oil heat recovery heating device of the low-temperature refrigeration system overcomes the defects of the prior art, utilizes the refrigerant to heat the lubricating oil, and saves the electricity consumption of oil heating.
The technical scheme adopted by the utility model for solving the technical problems is as follows: this low temperature refrigerating system oil return heat recovery heating device, its characterized in that: the oil heater comprises a compressor, a condenser, a refrigerant storage tank, an economizer and an oil heater, wherein an input port of the compressor is communicated with the top of the refrigerant storage tank, an output port of the compressor is communicated with a shell pass inlet of the oil heater after being connected with the condenser in series, a shell pass outlet of the oil heater is communicated with an input port of the economizer, a gas outlet of the economizer is communicated with the input port of the compressor, a liquid outlet of the economizer is communicated with the middle part or the lower part of the refrigerant storage tank, a tube pass inlet of the oil heater is communicated with the middle part of the refrigerant storage tank, and a tube pass outlet of the oil heater is communicated with the input port of the compressor.
Preferably, the economizer comprises a heat exchanger and an expansion valve, a shell-side outlet of the oil heater is communicated with a shell-side inlet of the heat exchanger and an input port of the expansion valve at the same time, an output port of the expansion valve is communicated with a tube-side inlet of the heat exchanger, a tube-side outlet of the heat exchanger is communicated with an input port of the compressor, and a shell-side outlet of the heat exchanger is communicated with the refrigerant storage tank.
Preferably, the input port of the compressor is communicated with the top of the refrigerant storage tank through a refrigerant input pipe, and the tube pass outlet of the oil heater is communicated with the refrigerant input pipe.
Preferably, the system also comprises an oil separator, an input port of the oil separator is communicated with an output port of the compressor, a refrigerant outlet of the oil separator is communicated with an input port of the condenser, and a lubricating oil outlet of the oil separator is communicated with an input port of the compressor. The oil separator can separate the lubricating oil in the refrigerant and make the lubricating oil flow back into the compressor, thereby ensuring the sufficient lubrication of the compressor.
Preferably, the compressor further comprises an oil cooler and an oil filter, an input port of the oil filter is communicated with a lubricating oil outlet of the oil separator, and an output port of the oil filter is communicated with an input port of the compressor after being connected with the oil cooler in series. The oil filter can filter the separated lubricating oil, and the oil cooler can cool the separated lubricating oil and then send the cooled lubricating oil into the compressor.
Preferably, the oil heater also comprises a refrigerant filter, and the output port of the condenser is communicated with the shell pass inlet of the oil heater after being connected with the refrigerant filter in series. The refrigerant filter can filter the refrigerant passing through the condenser.
Compared with the prior art, the utility model has the beneficial effects that:
the return oil heat recovery heating device of the low-temperature refrigeration system heats the lubricating oil fed into the compressor through the oil heater, the oil heater heats the lubricating oil through the refrigerant output by the condenser, the lubricating oil does not need to be heated through the electric heating tube, the power consumption for heating the lubricating oil is saved, and after the lubricating oil is heated through the high-pressure refrigerant, the refrigerant is supercooled, so that the power consumption of the compressor is reduced, and the running cost of the return oil heat recovery heating device of the low-temperature refrigeration system is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a return oil heat recovery heating device of a low-temperature refrigeration system.
In the figure: 1. the oil cooler comprises a compressor 2, an oil separator 3, a refrigerant return pipe 4, a condenser 5, a refrigerant filter 6, an economizer 7, an oil heater 8, a refrigerant storage tank 9, a refrigerant input pipe 10, an oil outlet pipe 11, an oil cooler 12, an oil filter 13 and an oil inlet pipe.
Detailed Description
Fig. 1 shows a preferred embodiment of the present invention, which is further described below with reference to fig. 1.
The utility model provides a low temperature refrigerating system return oil heat recovery heating device, including compressor 1, condenser 4, refrigerant storage tank 8, economizer 6 and oil heater 7, the input port of compressor 1 communicates with the top of refrigerant storage tank 8, the delivery outlet of compressor 1 is linked together with the shell side entry of oil heater 7 after condenser 4 is established ties, the shell side export of oil heater 7 is linked together with the input port of economizer 6, the gas outlet of economizer 6 is linked together with the input port of compressor 1, the liquid outlet of economizer 6 is linked together with the middle part or the lower part of refrigerant storage tank 8, the tube side entry of oil heater 7 is linked together with the middle part of refrigerant storage tank 8, the tube side export of oil heater 7 is linked together with the input port of compressor 1. This low temperature refrigerating system oil return heat recovery heating device heats the lubricating oil that sends into compressor 1 through oil heater 7, and oil heater 7 utilizes the refrigerant of condenser 4 output to lubricating oil heating, need not heat lubricating oil through the electrothermal tube, has saved the power consumption of lubricating oil heating, and after high-pressure refrigerant heated lubricating oil, the refrigerant subcooling has also reduced the power consumption of compressor 1, has reduced this low temperature refrigerating system oil return heat recovery heating device running cost.
The present invention is further described with reference to the following detailed description, however, it should be understood by those skilled in the art that the detailed description given herein with respect to the accompanying drawings is for better explanation and that the present invention is not necessarily limited to the specific embodiments, but rather, for equivalent alternatives or common approaches, may be omitted from the detailed description, while still remaining within the scope of the present application.
Specifically, the method comprises the following steps: as shown in fig. 1: the return oil heat recovery heating device of the low-temperature refrigeration system further comprises a refrigerant filter 5, an oil filter 12 and an oil cooler 11, an output port of the compressor 1 is communicated with an input port of the oil separator 1, a lubricating oil outlet of the oil separator 1 is sequentially connected with the oil filter 12 and the oil cooler 11 in series and then is communicated with the input port of the compressor 1, and lubricating oil separated by the oil separator 2 enters the oil cooler 11 after being filtered by the oil filter 12 and then enters the compressor 1 again after being cooled by the oil cooler 11.
The refrigerant outlet of the oil separator 2 is communicated with the inlet of the condenser 4, in this embodiment, the oil heater 7 is a shell-and-tube heat exchanger, the outlet of the condenser 4 is connected with the refrigerant filter 5 in series and then communicated with the shell-side inlet of the oil heater 7, and the refrigerant passing through the condenser 4 is filtered by the refrigerant filter 5 and then enters the oil heater 7.
The economizer 6 comprises a heat exchanger, an expansion valve and a safety valve, the heat exchanger is also a shell-and-tube heat exchanger, a shell-side outlet of the oil heater 7 is simultaneously communicated with a shell-side inlet of the heat exchanger and an input port of the safety valve, an output port of the safety valve is communicated with a tube-side inlet of the heat exchanger after being connected with the expansion valve in series, a tube-side outlet of the heat exchanger is communicated with an input port of the compressor 1 through a refrigerant return pipe 3, and a shell-side outlet of the heat exchanger is communicated with the middle part or the lower part of a refrigerant storage tank 8.
The inlet of the compressor is connected with the top of the coolant storage tank 8 through the coolant input pipe 9, the tube side inlet of the oil heater 7 is connected with the middle of the coolant storage tank 8 through the oil inlet pipe 13, and the tube side outlet of the oil heater 7 is connected with the coolant input pipe 9 through the oil outlet pipe 10. The input that advances oil pipe 13 is linked together through three communicating pipes and refrigerant storage tank 8, and the one end of each communicating pipe all communicates through stop valve and refrigerant storage tank 8, and the other end all is linked together with advancing oil pipe 13, and the stop valve on three communicating pipes sets gradually along the direction of height.
The bottom of the refrigerant storage tank 8 is connected with a delivery pump, liquid refrigerants are delivered to users through the delivery pump, the top of the refrigerant storage tank 8 is connected with an air return pipe, and gaseous refrigerants returned by the users enter the top of the refrigerant storage tank 8. During normal operation, the bottom of the refrigerant storage tank 8 is a liquid refrigerant, the top of the refrigerant storage tank is a gaseous refrigerant, and a layer of lubricating oil floats on the top of the liquid refrigerant.
The working process of the oil return heat recovery heating device of the low-temperature refrigeration system is as follows: the low-temperature low-pressure gaseous refrigerant in the refrigerant storage tank 8 enters the compressor 1, the gaseous refrigerant compressed into high-temperature high-pressure by the compressor enters the oil separator 2, the temperature of the high-temperature high-pressure gaseous refrigerant is 50 ℃, the high-temperature high-pressure gaseous refrigerant is condensed by the condenser 4 and then changed into high-pressure normal-temperature liquid refrigerant, the temperature of the high-pressure normal-temperature liquid refrigerant is 35 ℃, the high-pressure normal-temperature liquid refrigerant enters the oil heater 7, the lubricating oil fed into the compressor 1 is heated, the temperature of the lubricating oil is increased from-40 ℃ to-20 ℃, meanwhile, the temperature of the high-pressure normal-temperature liquid refrigerant is reduced to 20 ℃, part of the high-pressure normal-temperature liquid refrigerant fed out by the oil heater 7 enters the shell pass of the heater, and most of the high-pressure normal-temperature liquid refrigerant is throttled and reduced in pressure by the expansion valve and then is changed into low-temperature low-pressure liquid refrigerant, and the refrigerant is sent into a tube pass of the heat exchanger, the low-temperature low-pressure liquid refrigerant exchanges heat with the high-pressure normal-temperature refrigerant, the temperature of the high-pressure normal-temperature liquid refrigerant is reduced to 15 ℃, then the refrigerant is sent into the refrigerant storage tank 8, and the low-temperature low-pressure liquid refrigerant is sent back to the compressor 1.
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the utility model may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (6)
1. The utility model provides a low temperature refrigerating system oil return heat recovery heating device which characterized in that: the oil-gas compressor comprises a compressor (1), a condenser (4), a refrigerant storage tank (8), an economizer (6) and an oil heater (7), wherein an input port of the compressor (1) is communicated with the top of the refrigerant storage tank (8), an output port of the compressor (1) is communicated with a shell pass inlet of the oil heater (7) after being connected with the condenser (4) in series, a shell pass outlet of the oil heater (7) is communicated with an input port of the economizer (6), a gas outlet of the economizer (6) is communicated with the input port of the compressor (1), a liquid outlet of the economizer (6) is communicated with the middle part or the lower part of the refrigerant storage tank (8), a tube pass inlet of the oil heater (7) is communicated with the middle part of the refrigerant storage tank (8), and a tube pass outlet of the oil heater (7) is communicated with the input port of the compressor (1).
2. The return oil heat recovery heating device of a cryogenic refrigeration system as claimed in claim 1, wherein: the economizer (6) comprises a heat exchanger and an expansion valve, a shell side outlet of the oil heater (7) is communicated with a shell side inlet of the heat exchanger and an input port of the expansion valve at the same time, an output port of the expansion valve is communicated with a tube side inlet of the heat exchanger, a tube side outlet of the heat exchanger is communicated with an input port of the compressor (1), and a shell side outlet of the heat exchanger is communicated with the refrigerant storage tank (8).
3. The return oil heat recovery heating device of a cryogenic refrigeration system as claimed in claim 1, wherein: the inlet of the compressor (1) is communicated with the top of the refrigerant storage tank (8) through a refrigerant input pipe (9), and the tube side outlet of the oil heater (7) is communicated with the refrigerant input pipe (9).
4. The return oil heat recovery heating device of a cryogenic refrigeration system as claimed in claim 1, wherein: the oil separator also comprises an oil separator (2), an input port of the oil separator (2) is communicated with an output port of the compressor (1), a refrigerant outlet of the oil separator (2) is communicated with an input port of the condenser (4), and a lubricating oil outlet of the oil separator (2) is communicated with an input port of the compressor (1).
5. The return oil heat recovery heating device of a cryogenic refrigeration system of claim 4, wherein: the oil cooler is characterized by further comprising an oil cooler (11) and an oil filter (12), wherein an input port of the oil filter (12) is communicated with a lubricating oil outlet of the oil separator (2), and an output port of the oil filter (12) is communicated with an input port of the compressor (1) after being connected with the oil cooler (11) in series.
6. The return oil heat recovery heating device of a cryogenic refrigeration system as claimed in claim 1, wherein: the condenser is characterized by further comprising a refrigerant filter (5), and an output port of the condenser (4) is communicated with a shell side inlet of the oil heater (7) after being connected with the refrigerant filter (5) in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122286477.9U CN215983335U (en) | 2021-09-22 | 2021-09-22 | Oil return heat recovery heating device of low-temperature refrigeration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122286477.9U CN215983335U (en) | 2021-09-22 | 2021-09-22 | Oil return heat recovery heating device of low-temperature refrigeration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215983335U true CN215983335U (en) | 2022-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122286477.9U Active CN215983335U (en) | 2021-09-22 | 2021-09-22 | Oil return heat recovery heating device of low-temperature refrigeration system |
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| Country | Link |
|---|---|
| CN (1) | CN215983335U (en) |
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2021
- 2021-09-22 CN CN202122286477.9U patent/CN215983335U/en active Active
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