A gas-liquid separator and a refrigeration system

Abstract

The utility model relates to the field of refrigeration equipment, specifically disclose a kind of gas-liquid separator and refrigeration system, including container shell and the air inlet pipe and air outlet pipe of setting on container shell, condenser, expansion valve, evaporator, gas-liquid separator and compressor are sequentially connected in turn, and the air outlet of compressor and the air inlet of condenser are connected;The air inlet of gas-liquid separator and the air outlet of evaporator are connected, and the air outlet of gas-liquid separator and the air inlet of compressor are connected, gas-liquid separator is used to separate refrigerant liquid in refrigerant vapor, and refrigerant liquid processing piece is connected with the liquid outlet of gas-liquid separator, and refrigerant liquid processing piece is used to separate and process refrigerant liquid of the liquid outlet of gas-liquid separator. By the setting of refrigerant liquid processing piece, refrigerant vapor and refrigerant liquid in refrigerant gas-liquid mixture are separated from each other, so that refrigerant vapor in compressor is not easy to carry liquid under the premise of not improving refrigerant superheat and reducing evaporator heat exchange area utilization.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment, specifically to a gas-liquid separator and a refrigeration system. Background Technology

[0002] The refrigeration system includes a condenser, expansion valve, evaporator, and compressor, connected sequentially. The compressor's outlet is connected to the condenser's inlet. In the evaporator, liquid refrigerant absorbs heat from the object being cooled (water or air), vaporizing into low-temperature, low-pressure refrigerant vapor, which is then drawn into the compressor. The compressor compresses this vapor into high-pressure, high-temperature refrigerant vapor, which is then discharged into the condenser. In the condenser, the refrigerant vapor releases heat to the object being cooled (water or air), condensing into high-pressure liquid refrigerant. This liquid then expands through the expansion valve into low-pressure, low-temperature liquid refrigerant before re-entering the evaporator to absorb heat and vaporize, achieving a cyclic refrigeration process. Meanwhile, external water or air exchanges heat with the liquid refrigerant in the evaporator, thus cooling the surrounding water or air.

[0003] One issue is that the refrigerant vapor from the evaporator to the compressor carries liquid. In the existing technology, in order to ensure that there is no liquid at the compressor inlet, the superheat of the refrigerant needs to be increased so that the temperature of the liquid refrigerant when it enters the evaporator is raised. This allows the liquid refrigerant to be converted into vapor as much as possible when it enters the compressor. However, this leads to a decrease in the utilization rate of the heat exchange area of ​​the evaporator and a reduction in the efficiency of heat exchange between the liquid refrigerant and the outside air in the evaporator, which greatly affects the cooling or heating capacity. Utility Model Content

[0004] The technical solution adopted by this utility model to solve its technical problem is: to provide a gas-liquid separator, including a container shell and an air inlet pipe and an air outlet pipe disposed on the container shell, and a liquid outlet pipe disposed at the bottom of the container shell. The air inlet pipe is connected to the air inlet of the gas-liquid separator, and the air outlet pipe is connected to the air outlet of the gas-liquid separator. The container shell is arranged horizontally, and multiple separation blades are provided inside the container shell. The multiple separation blades are arranged side by side along the direction of gravity.

[0005] Furthermore, the spacing between the plurality of separating blades is 3mm-8mm.

[0006] Furthermore, the separating blade has a wave-like structure.

[0007] Furthermore, the wave of the separating blade has a sinusoidal structure.

[0008] Furthermore, the wave pattern of the separating blade is circular.

[0009] To address the technical problems existing in the prior art, this utility model also provides a refrigeration system, including a gas-liquid separator as described in the above embodiments, and further including a condenser, an expansion valve, an evaporator, a compressor, and a refrigerant liquid handling component. The condenser, expansion valve, evaporator, gas-liquid separator, and compressor are connected sequentially. The outlet of the compressor is connected to the inlet of the condenser, the inlet of the gas-liquid separator is connected to the outlet of the evaporator, and the outlet of the gas-liquid separator is connected to the inlet of the compressor. The gas-liquid separator is used to separate the refrigerant liquid from the refrigerant vapor. The refrigerant liquid handling component is connected to the outlet of the gas-liquid separator and is used to separate and process the refrigerant liquid at the outlet of the gas-liquid separator.

[0010] Furthermore, the refrigerant liquid handling component is a pump, the outlet of the gas-liquid separator is connected to the pump, the outlet of the pump is connected to the inlet of the evaporator, and the pump is used to transport the refrigerant liquid separated by the gas-liquid separator to the evaporator.

[0011] Furthermore, the refrigerant liquid handling component is a heat exchanger, the liquid outlet of the gas-liquid separator is connected to the liquid inlet of the heat exchanger, the gas outlet of the heat exchanger is connected to the gas inlet of the compressor, and the heat exchanger is used to vaporize the refrigerant liquid separated by the gas-liquid separator and deliver it to the compressor.

[0012] Furthermore, the heat exchanger is equipped with a temperature sensor at its inlet.

[0013] Furthermore, the outlet of the heat exchanger is equipped with a second temperature sensor.

[0014] The beneficial effects of this utility model are: by setting up a refrigerant liquid handling component and a gas-liquid separator, the refrigerant vapor and refrigerant liquid in the refrigerant gas-liquid mixture are separated from each other, thereby making it less likely for the refrigerant vapor entering the compressor to carry liquid without increasing the refrigerant superheat or reducing the utilization rate of the evaporator heat exchange area. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] In the picture: Figure 1 This is an overall structural diagram of a gas-liquid separator provided in Embodiment 1 of this utility model;

[0017] Figure 2 for Figure 1 The cross-sectional view of the separating blades is shown;

[0018] Figure 3 This is a cross-sectional view of the separating blade provided in Embodiment 2 of this utility model;

[0019] Figure 4 An overall structural diagram of a refrigeration system provided in Embodiment 3 of this utility model (arrows indicate the flow direction of the refrigerant);

[0020] Figure 5 An overall structural diagram of a refrigeration system provided in Embodiment 4 of this utility model (arrows indicate the flow direction of refrigerant and heat exchange medium);

[0021] Figure 6 This is an overall structural diagram of a refrigeration system provided in Embodiment 5 of this utility model (arrows indicate the flow direction of the refrigerant).

[0022] Figure 7 This is an overall structural diagram of a refrigeration system provided in Embodiment Six of this utility model (arrows indicate the flow direction of refrigerant and heat exchange medium).

[0023] Explanation of reference numerals in the attached diagram: 1. Condenser; 2. Expansion valve; 3. Evaporator; 4. Compressor; 5. Gas-liquid separator; 51. Container shell; 52. Inlet pipe; 53. Outlet pipe; 54. Liquid outlet pipe; 55. Separator blades; 6. Pump; 7. Heat exchanger; 71. Temperature sensor one; 72. Temperature sensor two; 73. Heat exchange medium inlet; 74. Heat exchange medium outlet. Detailed Implementation

[0024] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will now be described in detail with reference to the accompanying drawings. This drawing is a simplified schematic diagram, illustrating only the basic aspects of the present utility model, and therefore only shows the components relevant to the present utility model. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0025] Example 1

[0026] Please refer to Figure 1 and Figure 2 This utility model provides a gas-liquid separator 5, including a container shell 51, an air inlet pipe 52 and an air outlet pipe 53 disposed on the container shell 51, and a liquid outlet pipe 54 disposed at the bottom of the container shell 51. The air inlet pipe 52 is connected to the air inlet of the gas-liquid separator 5, and the air outlet pipe 53 is connected to the air outlet of the gas-liquid separator 5.

[0027] by Figure 1The height of the container shell 51 is in the direction of gravity, and its length is horizontal. The container shell 51 is horizontally arranged, with the inlet pipe 52 and outlet pipe 53 located on opposite sides of the container shell 51 in the horizontal direction. Multiple separation blades 55 are provided inside the container shell 51, arranged side-by-side along the direction of gravity. The centerline of the inlet pipe 52 is lower than the centerline of the container shell 51, while the centerline of the outlet pipe 53 is higher than the centerline of the container shell 51. The highest point of the outlet pipe 53 is lower than or equal to the top of the container shell 51.

[0028] Specifically, the container shell 51 is cylindrical, and the diameter of the container shell 51 is 2-5 times the diameter of the air inlet pipe 52. The diameter of the air outlet pipe 53 is the same as the diameter of the air inlet pipe 52.

[0029] The spacing between the multiple separating blades 55 is 3mm-8mm. Preferably, the spacing between the multiple separating blades 55 is 5mm.

[0030] The separating blade 55 has a wave structure. Specifically, in this embodiment, the wave height on the separating blade 55 is equal to the distance between adjacent separating blades 55, the number of waves on the separating blade 55 is 3-10, and the waves of the separating blade 55 have a sinusoidal wave structure. Through the wave structure, when the refrigerant gas-liquid mixture from the outlet of the evaporator 3 enters the container shell 51 through the inlet pipe 52, the refrigerant vapor in the refrigerant gas-liquid mixture is forced to change its flow direction multiple times by the multiple waves on the separating blade 55. Meanwhile, the refrigerant liquid in the refrigerant gas-liquid mixture has a large mass and high inertia, and cannot quickly change direction with the changes in the wave structure. Therefore, it accumulates on the surface of the separating blade 55 and flows downwards along the surface of the separating blade 55 under the action of gravity, thereby achieving the separation of the refrigerant vapor and refrigerant liquid in the refrigerant gas-liquid mixture.

[0031] Specifically, the waves on the separating blades 55 are arranged side by side in the horizontal direction, and a gap is provided between the separating blades 55 and the inner wall of the container shell 51 for the refrigerant liquid to pass through.

[0032] Example 2

[0033] Please refer to Figure 3 The difference between this embodiment and embodiment one is that the wave of the separating blade 55 is a circular structure. The height of the wave in this embodiment is higher than that in embodiment one, thereby increasing the contact area between the separating blade 55 and the refrigerant liquid in the refrigerant gas-liquid mixture, thereby improving the separation efficiency of the gas-liquid separator 5.

[0034] Example 3

[0035] Please refer to Figure 4To address the technical problems existing in the prior art, this utility model embodiment also provides a refrigeration system, including the gas-liquid separator 5 described in Embodiment 1, and further including a condenser 1, an expansion valve 2, an evaporator 3, a compressor 4, and a refrigerant liquid handling component. The condenser 1, expansion valve 2, evaporator 3, gas-liquid separator 5, and compressor 4 are connected sequentially. The outlet of compressor 4 is connected to the inlet of condenser 1. The inlet of gas-liquid separator 5 is connected to the outlet of evaporator 3, and the outlet of gas-liquid separator 5 is connected to the inlet of compressor 4. Gas-liquid separator 5 is used to separate refrigerant liquid from refrigerant vapor. The refrigerant liquid handling component is connected to the outlet of gas-liquid separator 5, and is used to separate and process the refrigerant liquid at the outlet of gas-liquid separator 5.

[0036] The working process of the refrigeration system provided in this embodiment is as follows: After the refrigerant liquid absorbs heat from the object being cooled (water or air) in the evaporator 3, it vaporizes into low-temperature, low-pressure refrigerant vapor, which is then drawn into the compressor 4. The compressor 4 then compresses the vapor into high-pressure, high-temperature refrigerant vapor, which is then discharged into the condenser 1. In the condenser 1, the refrigerant vapor releases heat to the object being cooled (water or air) and condenses into medium-temperature, high-pressure refrigerant liquid. This liquid then expands through the expansion valve 2 into low-pressure, low-temperature refrigerant liquid and re-enters the evaporator 3 to absorb heat and vaporize, achieving the purpose of cyclic refrigeration. Meanwhile, the external water or air exchanges heat with the liquid refrigerant in the evaporator 3, thereby achieving the purpose of cooling the external water or air.

[0037] Please refer to Figure 4 The refrigerant liquid handling component is pump 6. The outlet of the gas-liquid separator 5 is connected to pump 6, and the outlet of pump 6 is connected to the inlet of evaporator 3. Pump 6 is used to transport the refrigerant liquid separated by gas-liquid separator 5 to evaporator 3.

[0038] When the refrigerant gas-liquid mixture from the outlet of evaporator 3 enters the container shell 51 through the inlet pipe 52, the flow area of ​​the refrigerant gas-liquid mixture suddenly expands because the diameter of the container shell 51 is 2-5 times the diameter of the inlet pipe 52. This causes the flow velocity of the refrigerant gas-liquid mixture to drop rapidly to 0. Due to the density difference between the gaseous and liquid media, the refrigerant vapor in the refrigerant gas-liquid mixture rises along the direction of gravity due to its lower density and enters the compressor 4 through the outlet pipe 53. The refrigerant liquid in the refrigerant gas-liquid mixture flows downward along the direction of gravity from the gap between the separating blade 55 and the container shell 51 until it flows into the pump 6 along the liquid outlet pipe 54. Pump 6 delivers liquid refrigerant to evaporator 3. The liquid refrigerant undergoes further heat exchange with water or air in evaporator 3 to become refrigerant vapor. It then passes through evaporator 3 and gas-liquid separator 5 and is fed into compressor 4. This ensures that the refrigerant vapor entering compressor 4 is less likely to carry liquid without increasing refrigerant superheat or reducing the heat exchange area utilization of evaporator 3.

[0039] Example 4

[0040] Please refer to Figure 5 This embodiment provides a refrigeration system. The difference between this embodiment and Embodiment 3 is that the refrigerant liquid handling component is a heat exchanger 7, the liquid outlet of the gas-liquid separator 5 is connected to the liquid inlet of the heat exchanger 7, and the gas outlet of the heat exchanger 7 is connected to the gas inlet of the compressor 4. The heat exchanger 7 is used to vaporize the refrigerant liquid separated by the gas-liquid separator 5 and then transport it to the compressor 4.

[0041] When the refrigerant gas-liquid mixture from the outlet of evaporator 3 enters the container shell 51 through the inlet pipe 52, the flow area of ​​the refrigerant gas-liquid mixture suddenly expands because the diameter of the container shell 51 is 2-5 times the diameter of the inlet pipe 52. This causes the flow velocity of the refrigerant gas-liquid mixture to rapidly decrease to 0. Due to the density difference between the gaseous and liquid media, the refrigerant vapor in the refrigerant gas-liquid mixture, due to its lower density, rises along the direction of gravity and enters the compressor 4 through the outlet pipe 53. The refrigerant liquid in the refrigerant gas-liquid mixture, due to its higher density, flows downwards along the direction of gravity from the gap between the separating blades 55 and the container shell 51 until it flows into the heat exchanger 7 through the liquid outlet pipe 54. The refrigerant liquid absorbs heat from the heat exchange medium in the heat exchanger 7 and evaporates into refrigerant vapor, which is then input into the compressor 4 through the heat exchanger 7. This ensures that the refrigerant vapor entering the compressor 4 is less likely to carry liquid without increasing the refrigerant superheat or reducing the utilization rate of the heat exchange area of ​​evaporator 3.

[0042] The heat exchanger 7 has a temperature sensor 71 at the liquid inlet and a temperature sensor 72 at the gas outlet.

[0043] The heat exchanger 7 is also provided with a heat exchange medium inlet 73 and a heat exchange medium outlet 74. The heat exchange medium enters the heat exchanger 7 through the heat exchange medium inlet 73 and exchanges heat with the refrigerant liquid, and then flows out through the heat exchange medium outlet 74. Specifically, the heat exchange medium in this embodiment includes, but is not limited to, water, refrigerant liquid, or air. The source of the heat exchange medium can be any component within the refrigeration system or an external source.

[0044] Example 5

[0045] Please refer to Figure 6 This embodiment provides a refrigeration system. The difference between this embodiment and embodiment three is that the wave of the separating blade 55 is a circular structure. The height of the wave in this embodiment is higher than that in embodiment three, thereby increasing the contact area between the separating blade 55 and the refrigerant liquid in the refrigerant gas-liquid mixture, thereby improving the separation efficiency of the gas-liquid separator 5.

[0046] Example 6

[0047] Please refer to Figure 7 This embodiment provides a refrigeration system. The difference between this embodiment and Embodiment 3 is that the refrigerant liquid handling component is a heat exchanger 7, and the wave of the separating blade 55 is a circular structure.

[0048] In the refrigeration systems described in Examples 4 and 6, the temperature value measured by temperature sensor 71 is set as T1, and the temperature value measured by temperature sensor 72 is set as T2. The superheat of the refrigerant vapor at the outlet of heat exchanger 7 is calculated based on T2 and T1; the superheat is the difference between T2 and T1. The opening of expansion valve 2 is adjusted according to the magnitude of the superheat, with a standard superheat range of 5℃-15℃. Specifically, if the superheat is greater than the standard range, the opening of expansion valve 2 is increased; if the superheat is less than the standard range, the opening of expansion valve 2 is decreased. Controlling the opening of expansion valve 2 by the superheat of the refrigerant within heat exchanger 7 helps to reduce the underutilization of the heat exchange area within heat exchanger 7.

Claims

1. A gas-liquid separator, characterized in that: It includes a container shell, an air inlet pipe and an air outlet pipe disposed on the container shell, and a liquid outlet pipe disposed at the bottom of the container shell. The air inlet pipe is connected to the air inlet of the gas-liquid separator, and the air outlet pipe is connected to the air outlet of the gas-liquid separator. The container shell is arranged horizontally, and multiple separation blades are provided inside the container shell. The multiple separation blades are arranged side by side along the direction of gravity.

2. The gas-liquid separator according to claim 1, characterized in that: The spacing between the multiple separating blades is 3mm-8mm.

3. The gas-liquid separator according to claim 2, characterized in that: The separating blades have a wave-like structure.

4. The gas-liquid separator according to claim 3, characterized in that: The waves of the separated blades have a sinusoidal structure.

5. The gas-liquid separator according to claim 2, characterized in that: The wave-like structure of the separating blade is circular.

6. A refrigeration system, characterized in that: The device includes a gas-liquid separator as described in any one of claims 1-5, further comprising a condenser, an expansion valve, an evaporator, a compressor, and a refrigerant liquid handling unit. The condenser, expansion valve, evaporator, gas-liquid separator, and compressor are connected sequentially. The outlet of the compressor is connected to the inlet of the condenser. The inlet of the gas-liquid separator is connected to the outlet of the evaporator. The outlet of the gas-liquid separator is connected to the inlet of the compressor. The gas-liquid separator is used to separate refrigerant liquid from refrigerant vapor. The refrigerant liquid handling unit is connected to the outlet of the gas-liquid separator and is used to separate and process the refrigerant liquid at the outlet of the gas-liquid separator.

7. The refrigeration system according to claim 6, characterized in that: The refrigerant liquid handling component is a pump. The outlet of the gas-liquid separator is connected to the pump, and the outlet of the pump is connected to the inlet of the evaporator. The pump is used to transport the refrigerant liquid separated by the gas-liquid separator to the evaporator.

8. The refrigeration system according to claim 6, characterized in that: The refrigerant liquid handling component is a heat exchanger. The liquid outlet of the gas-liquid separator is connected to the liquid inlet of the heat exchanger, and the gas outlet of the heat exchanger is connected to the gas inlet of the compressor. The heat exchanger is used to vaporize the refrigerant liquid separated by the gas-liquid separator and then transport it to the compressor.

9. The refrigeration system according to claim 8, characterized in that: The heat exchanger is equipped with a temperature sensor at its liquid inlet.

10. The refrigeration system according to claim 9, characterized in that: The heat exchanger is equipped with a temperature sensor 2 at its outlet.

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