Air separator of efficient refrigerating system

Abstract

The utility model discloses an air separator of an efficient refrigeration system, relates to the technical field of refrigeration, and mainly aims to improve the recovery efficiency of a refrigerant in mixed gas. According to the main technical scheme, the air separator of the efficient refrigerating system comprises a first space and a second space which are isolated from each other, and a liquid level meter is arranged in the first space; the liquid supply pipe is connected to an inlet of the first space, the air return pipe is connected to an outlet of the first space, and the liquid supply pipe is provided with a first control valve; the air supply pipe is connected to an inlet of the second space, the blow-down pipe is connected to an outlet of the second space, one end of the liquid return pipe is connected to the lower end of the second space, the other end of the liquid return pipe is connected to an inlet of the first space, the air supply pipe is provided with a second control valve, the blow-down pipe is provided with a third control valve, and the liquid return pipe is provided with a fourth control valve; the liquid level meter is connected to the input end of the controller, and the output end of the controller is connected to the first control valve, the second control valve, the third control valve and the fourth control valve.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration, in particular to an air separator for an efficient refrigeration system. Background Art

[0002] In the existing refrigeration system, an air separator is usually used to remove the non-condensable gas in the system to ensure the normal operation of the system. However, there are some problems in the design and use of the existing air separator, which requires manual operation to adjust the liquid supply and recover the condensed refrigerant, and cannot achieve fully automatic operation. Therefore, there are the following disadvantages:

[0003] The existing air separator has low separation and recovery efficiency and cannot efficiently recover the condensate in the mixed gas;

[0004] During continuous operation, manual operation is frequent, prone to misoperation, wasting refrigerant and causing frostbite to personnel. Summary of the Utility Model

[0005] In view of this, an embodiment of the utility model provides an air separator for an efficient refrigeration system, and the main purpose is to improve the recovery efficiency of the refrigerant in the mixed gas.

[0006] To achieve the above purpose, the utility model mainly provides the following technical solutions:

[0007] An embodiment of the utility model provides an air separator for an efficient refrigeration system, which includes: a heat exchange cavity, a liquid phase mechanism and a gas phase mechanism;

[0008] The heat exchange cavity includes a first space and a second space which are isolated from each other, and a liquid level gauge is arranged in the first space;

[0009] The liquid phase mechanism includes a liquid supply pipe and a return air pipe. The liquid supply pipe is connected to the inlet of the first space, the return air pipe is connected to the outlet of the first space, and a first control valve is installed on the liquid supply pipe;

[0010] The gas phase mechanism includes a gas supply pipe, a vent pipe and a liquid return pipe. The gas supply pipe is connected to the inlet of the second space, the vent pipe is connected to the outlet of the second space, one end of the liquid return pipe is connected to the lower end of the second space, the other end of the liquid return pipe is connected to the inlet of the first space, a second control valve is installed on the gas supply pipe, a third control valve is installed on the vent pipe, and a fourth control valve is installed on the liquid return pipe;

[0011] Wherein, the liquid level gauge is connected to the input end of the controller, and the output end of the controller is respectively connected to the first control valve, the second control valve, the third control valve and the fourth control valve.

[0012] The object of the present utility model and the technical problems to be solved can be further achieved by the following technical measures.

[0013] Optionally, the heat exchange cavity is a vertical shell-and-tube heat exchanger, the first space is the tube side of the vertical shell-and-tube heat exchanger, and the second space is the shell side of the vertical shell-and-tube heat exchanger.

[0014] Optionally, it further includes a pipeline filter, and the pipeline filter is installed on the liquid supply pipe.

[0015] Optionally, it further includes a pressure gauge, and the pressure gauge is connected to the second space.

[0016] Optionally, the first control valve, the second control valve, the third control valve and the fourth control valve are all solenoid valves.

[0017] By means of the above technical solutions, the present utility model has at least the following advantages:

[0018] When the device is operating, the controller opens the first control valve, and the liquid-phase refrigerant in the refrigerant storage tank enters the first space through the liquid supply pipe. When the liquid level gauge detects that the liquid level in the first space reaches the upper limit of the liquid level, the controller closes the first control valve;

[0019] The controller opens the second control valve, the third control valve and the fourth control valve. The mixed gas to be condensed enters the second space through the gas supply pipe. The cold quantity of the liquid-phase refrigerant in the first space is transferred to the second space. The refrigerant in the first space vaporizes (the vaporized refrigerant reaches the compressor through the return pipe), the refrigerant in the mixed gas liquefies, and the non-condensable air is discharged from the second space through the vent pipe; because the non-condensable air absorbs part of the cold quantity, the molar amount of the vaporized refrigerant in the first space is greater than the molar amount of the liquefied refrigerant in the second space. Although the liquefied refrigerant in the second space flows into the first space through the liquid return pipe, the liquid level in the first space still gradually decreases.

[0020] When the liquid level in the first space drops to the lower limit of the liquid level, the controller closes the second control valve, the third control valve and the fourth control valve, opens the first control valve, the liquid level in the first space rises to the upper limit of the liquid level again, the controller closes the first control valve again, and opens the second control valve, the third control valve and the fourth control valve.

[0021] Through the above repeated operations, the refrigerant component and air in the mixed gas are separated, and the refrigerant component therein is automatically recovered, improving the recovery efficiency.

[0022] When the refrigerant in the mixed gas is completely recovered, the liquid level gauge is powered off, the controller closes the first control valve, the second control valve and the third control valve, and opens the fourth control valve, so that the pressures in the first space and the second space of the heat exchange cavity are the same, thereby avoiding damage to the structure of the heat exchange cavity. Brief Description of the Drawings

[0023] Figure 1 It is a diagram of an air separator for an efficient refrigeration system provided by an embodiment of the present utility model.

[0024] Reference numerals in the accompanying drawings of the specification include: heat exchange cavity 1, liquid level gauge 2, liquid supply pipe 3, return air pipe 4, first control valve 5, air supply pipe 6, vent pipe 7, return liquid pipe 8, second control valve 9, third control valve 10, fourth control valve 11, pipeline filter 12, pressure gauge 13. Detailed Embodiments

[0025] To further elaborate on the technical means and effects adopted by the present utility model to achieve the intended utility model purpose, the following combines the accompanying drawings and preferred embodiments to detail the specific embodiments, structures, features, and their effects according to the application of the present utility model. In the following description, different "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. In addition, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0026] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0027] As Figure 1 shown, an air separator for an efficient refrigeration system provided by an embodiment of the present utility model includes: a heat exchange cavity 1, a liquid phase mechanism, and a gas phase mechanism;

[0028] The heat exchange cavity 1 includes a first space and a second space that are isolated from each other, and the first space is provided with a liquid level gauge 2;

[0029] The liquid phase mechanism includes a liquid supply pipe 3 and a return air pipe 4. The liquid supply pipe 3 is connected to the inlet of the first space, the return air pipe 4 is connected to the outlet of the first space, and the liquid supply pipe 3 is equipped with a first control valve 5;

[0030] The gas phase mechanism includes an air supply pipe 6, a vent pipe 7, and a return liquid pipe 8. The air supply pipe 6 is connected to the inlet of the second space, the vent pipe 7 is connected to the outlet of the second space, one end of the return liquid pipe 8 is connected to the lower end of the second space, the other end of the return liquid pipe 8 is connected to the inlet of the first space, the air supply pipe 6 is equipped with a second control valve 9, the vent pipe 7 is equipped with a third control valve 10, and the return liquid pipe 8 is equipped with a fourth control valve 11;

[0031] Among them, the liquid level gauge 2 is connected to the input end of the controller, and the output end of the controller is respectively connected to the first control valve 5, the second control valve 9, the third control valve 10, and the fourth control valve 11.

[0032] The working process of the air separator of the high-efficiency refrigeration system is as follows:

[0033] When the device is running, the controller opens the first control valve 5, and the liquid-phase refrigerant in the refrigerant storage tank enters the first space through the liquid supply pipe 3. When the liquid level gauge 2 detects that the liquid level in the first space reaches the upper limit of the liquid level, the controller closes the first control valve 5;

[0034] The controller opens the second control valve 9, the third control valve 10 and the fourth control valve 11. The mixed gas to be condensed enters the second space through the gas supply pipe 6. The cold quantity of the liquid-phase refrigerant in the first space is transferred to the second space. The refrigerant in the first space vaporizes (the vaporized refrigerant reaches the compressor through the return pipe 4), the refrigerant in the mixed gas liquefies, and the non-condensable air is discharged from the second space through the vent pipe 7; because the non-condensable air absorbs part of the cold quantity, the molar amount of the vaporized refrigerant in the first space is greater than the molar amount of the liquefied refrigerant in the second space. Although the liquefied refrigerant in the second space flows into the first space through the liquid return pipe 8, the liquid level in the first space still gradually decreases.

[0035] When the liquid level in the first space drops to the lower limit of the liquid level, the controller closes the second control valve 9, the third control valve 10 and the fourth control valve 11, opens the first control valve 5, the liquid level in the first space rises to the upper limit of the liquid level again, the controller closes the first control valve 5 again, and opens the second control valve 9, the third control valve 10 and the fourth control valve 11.

[0036] In the technical solution of the present utility model, through the above repeated operations, the refrigerant component and air in the mixed gas are separated, the refrigerant component is automatically recovered, and the recovery efficiency is improved.

[0037] In the specific embodiment, the heat exchange cavity 1 is a vertical shell-and-tube heat exchanger, the first space is the tube side of the vertical shell-and-tube heat exchanger, and the second space is the shell side of the vertical shell-and-tube heat exchanger.

[0038] In this embodiment, specifically, the heat exchange cavity 1 is a vertical shell-and-tube heat exchanger.

[0039] Because the lower end of the tube side of the vertical shell-and-tube heat exchanger is the inlet of the first space, the upper end of the tube side of the vertical shell-and-tube heat exchanger is the outlet of the first space, the lower end of the shell side of the vertical shell-and-tube heat exchanger is higher than the lower end of the tube side, and the condensed refrigerant in the mixed gas can flow downward along the liquid return pipe 8 to the tube side, achieving the purpose of smooth recovery of the refrigerant.

[0040] In the specific embodiment, it further includes a pipeline filter 12, and the pipeline filter 12 is installed on the liquid supply pipe 3.

[0041] In this embodiment, specifically, the pipeline filter 12 can filter impurities in the refrigerant to prevent the internal space of the heat exchange cavity 1 from being blocked.

[0042] In a specific embodiment, it further includes a pressure gauge 13, and the pressure gauge 13 is connected to the second space.

[0043] In this embodiment, specifically, an operator can observe the gas phase pressure in the second space through the pressure gauge 13 to prevent the second space from overpressuring.

[0044] In a specific embodiment, the first control valve 5, the second control valve 9, the third control valve 10, and the fourth control valve 11 are all solenoid valves.

[0045] In this embodiment, specifically, compared with pneumatic control valves, solenoid valves have higher control precision and can better control the actual flow rates of various fluids.

[0046] The above is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of changes or substitutions, which should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A high-efficiency refrigeration system air separator, characterized in that: include: A heat exchange cavity, the heat exchange cavity comprising a first space and a second space isolated from each other, the first space being provided with a liquid level gauge; A liquid phase mechanism, the liquid phase mechanism comprising a liquid supply pipe and an air return pipe, the liquid supply pipe is connected to the inlet of the first space, the air return pipe is connected to the outlet of the first space, and the liquid supply pipe is installed with a first control valve; A gas phase mechanism, the gas phase mechanism comprising a gas supply pipe, a vent pipe and a liquid return pipe, the gas supply pipe is connected to the inlet of the second space, the vent pipe is connected to the outlet of the second space, one end of the liquid return pipe is connected to the lower end of the second space, and the other end of the liquid return pipe is connected to the inlet of the first space, the gas supply pipe is installed with a second control valve, the vent pipe is installed with a third control valve, and the liquid return pipe is installed with a fourth control valve; Wherein, the liquid level meter is connected to the input end of the controller, and the output end of the controller is respectively connected to the first control valve, the second control valve, the third control valve and the fourth control valve.

2. The high-efficiency refrigeration system air separator according to claim 1, characterized in that: The heat exchange cavity is a vertical shell-and-tube heat exchanger, the first space is a tube side of the vertical shell-and-tube heat exchanger, and the second space is a shell side of the vertical shell-and-tube heat exchanger.

3. The high-efficiency refrigeration system air separator according to claim 1, characterized in that: It also includes a pipeline filter, which is installed on the liquid supply pipe.

4. The high-efficiency refrigeration system air separator according to claim 1, characterized in that: Also included is a pressure gauge, which is connected to the second space.

5. The high-efficiency refrigeration system air separator according to any one of claims 1 to 4, characterized in that: The first control valve, the second control valve, the third control valve and the fourth control valve are all solenoid valves.

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