Circulating refrigeration type compressed air dryer

Abstract

The utility model belongs to the technical field of air dryers, and particularly relates to a circulating type refrigeration type compressed air dryer which comprises an evaporator, a cooler, a compressor, a gas-water separator and an expansion valve, and the evaporator comprises a shell, a first heat exchange pipe, a second heat exchange pipe, a third heat exchange pipe and a heat exchange support. An air inlet, a cooling air outlet, a dry air inlet, a dry air outlet, a cooling liquid inlet and a cooling liquid outlet are formed in the shell, the first heat exchange pipe is communicated with the dry air inlet and the dry air outlet, the second heat exchange pipe is arranged on the peripheral side of the first heat exchange pipe in a winding mode and communicated with the air inlet and the cooling air outlet, and the heat exchange support is fixed in the shell. The second heat exchange pipe is attached to the heat exchange support, and the third heat exchange pipe is arranged on the peripheral side of the heat exchange support in a winding mode and communicates with the cooling liquid inlet and the cooling liquid outlet. The dryer is low in energy consumption and high in heat exchange efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of air dryer technology, specifically relating to a recirculating refrigerated compressed air dryer. Background Technology

[0002] Compressed air is widely used in industrial production, but it also contains moisture and impurities during its generation. Moisture not only affects gas quality but can also lead to equipment corrosion and malfunctions. Therefore, compressed air drying equipment is a crucial element in ensuring the dryness of the air source. Refrigerated dryers, as a commonly used compressed air drying device, are widely used in various industries due to their high efficiency and stable performance.

[0003] However, existing compressed air dryers consume a lot of energy and cannot fully utilize the heat exchange between the coolant and the air. Utility Model Content

[0004] The purpose of this invention is to solve the problems described in the background section, and to propose a new recirculating refrigerated compressed air dryer with low energy consumption.

[0005] To achieve the above objectives, a recirculating refrigerated compressed air dryer is provided. The recirculating refrigerated compressed air dryer includes an evaporator, a cooler, a compressor, an air-water separator, and an expansion valve. The evaporator includes a shell, a first heat exchange tube, a second heat exchange tube, a third heat exchange tube, and a heat exchange support. The shell is provided with an air inlet, a cooling gas outlet, a drying gas inlet, a drying gas outlet, a coolant inlet, and a coolant outlet. The first heat exchange tube connects to the drying gas inlet and the drying gas outlet. The second heat exchange tube is wound around the periphery of the first heat exchange tube and connects to the air inlet and the cooling gas outlet. The heat exchange support is fixed inside the shell, and the second heat exchange tube is fitted to the heat exchange support. The third heat exchange tube is wound around the periphery of the heat exchange support and connects to the coolant inlet and the coolant outlet.

[0006] The evaporator is connected to the gas-water separator and the cooler via pipelines. The cooler is connected to the compressor via pipelines. The expansion valve is located on the pipeline connecting the cooler and the compressor.

[0007] In the above technical solution, the humid air in the second and third heat exchange tubes exchanges heat with the coolant. The humid air is cooled to saturation and then enters the gas-liquid separator to be dehydrated into low-temperature dry gas. It then enters the evaporator and passes through the first and second heat exchange tubes to achieve heat exchange between the low-temperature dry gas and the humid air. This not only reduces the temperature of the humid air but also raises the temperature of the low-temperature dry gas before it is discharged into the atmosphere, making full use of heat and greatly reducing energy consumption.

[0008] Furthermore, the recirculating refrigerated compressed air dryer also includes a filter, which is connected to the evaporator via a pipeline.

[0009] Furthermore, the filter is connected to the air inlet of the evaporator via a pipe.

[0010] In the above technical solution, the filter can filter the air entering the evaporator to prevent dust and other impurities in the air from damaging the dryer.

[0011] Furthermore, the recirculating refrigerated compressed air dryer also includes a precooler, which is connected to a filter via a pipeline.

[0012] Furthermore, the precooler is connected to the air inlet of the evaporator via a pipeline.

[0013] In the above technical solution, the precooler can reduce the temperature of the air entering the evaporator, thereby improving the refrigeration efficiency and reducing the energy consumption of the dryer.

[0014] Furthermore, the cooler is provided with a first inlet and a first outlet. The first inlet is connected to the coolant outlet through a pipeline, and the first outlet is connected to the coolant inlet through a pipeline.

[0015] In the above technical solution, the cooler introduces coolant into the evaporator for heat exchange and forms a circulation.

[0016] Furthermore, the cooler is provided with a second inlet and a second outlet. The second inlet is connected to the outlet of the compressor via a pipeline, and the second outlet is connected to the inlet of the compressor via a pipeline.

[0017] In the above technical solution, an internal circulation loop is formed between the compressor and the cooler to cool the coolant.

[0018] Furthermore, a humidity sensor is provided at the dry gas outlet of the evaporator.

[0019] The above technical solution can be used to test the drying effect of the dryer on the air. If the drying effect is insufficient, a return branch can be set up, which connects the air outlet pipe at the dry air outlet to the air inlet pipe at the air inlet, so that the drying can be circulated again.

[0020] Furthermore, the heat exchange support is also provided with several fins, which are in contact with the second heat exchange tube and the third heat exchange tube respectively.

[0021] In the above technical solution, the heat transfer between the second heat exchange tube and the third heat exchange tube can be enhanced by setting fins.

[0022] The advantages of this utility model are:

[0023] 1. This utility model allows air, dried air and coolant to exchange heat simultaneously in the evaporator, making full use of the heat of air and coolant, thereby reducing the energy consumption required for cooling.

[0024] 2. This utility model can detect the dried air in real time through a humidity sensor, adjust the coolant temperature, and circulate and dry the insufficiently dried air to achieve the standard drying effect. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the recirculating refrigerated compressed air dryer of this utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the evaporator of this utility model.

[0028] Diagram description: 1. Evaporator, 2. Cooler, 3. Compressor, 4. Gas-liquid separator, 5. Expansion valve, 6. Filter, 7. Precooler, 101. Shell, 102. Air inlet, 103. Cooling gas outlet, 104. Drying gas inlet, 105. Drying gas outlet, 106. Coolant inlet, 107. Coolant outlet, 108. First heat exchange tube, 109. Second heat exchange tube, 110. Third heat exchange tube, 111. Heat exchange support, 112. Fins. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0030] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] like Figure 1 As shown, a recirculating refrigerated compressed air dryer includes an evaporator 1, a cooler 2, a compressor 3, an air-water separator 4, and an expansion valve 5. The evaporator is connected to the air-water separator and the cooler via pipelines, the cooler is connected to the compressor via pipelines, and the expansion valve is located on the pipeline connecting the cooler and the compressor.

[0032] like Figure 2 As shown, the evaporator consists of a shell 101, a first heat exchange tube 108, a second heat exchange tube 109, a third heat exchange tube 110, and a heat exchange bracket 111. The top of the shell is provided with an air inlet 102 and a cooling gas outlet 103, and the bottom of the shell is provided with a coolant inlet 106 and a coolant outlet 107. The left and right sides of the shell are respectively provided with a dry gas inlet 104 and a dry gas outlet 105. The first heat exchange tube connects the dry gas inlet and the dry gas outlet. The second heat exchange tube is wrapped around the periphery of the first heat exchange tube and connects the air inlet and the cooling gas outlet. The heat exchange bracket is fixed inside the shell, and the second heat exchange tube is attached to the heat exchange bracket. The third heat exchange tube is wrapped around the periphery of the heat exchange bracket and connects the coolant inlet and the coolant outlet.

[0033] In one embodiment, the recirculating refrigerated compressed air dryer is further provided with a filter 6, which is connected to the air inlet of the evaporator via a pipeline.

[0034] In one embodiment, the recirculating refrigerated compressed air dryer is further provided with a precooler 7, which is connected to the air inlet of the evaporator via a pipeline.

[0035] In one embodiment, the cooler is provided with a first inlet and a first outlet. The first inlet is connected to the coolant outlet through a pipe, and the first outlet is connected to the coolant inlet through a pipe. Coolant is provided in the circulation loop between the cooler and the evaporator.

[0036] In one embodiment, the cooler is provided with a second inlet and a second outlet. The second inlet is connected to the outlet of the compressor via a pipeline, and the second outlet is connected to the inlet of the compressor via a pipeline. Refrigerant is provided in the circulation loop between the cooler and the compressor.

[0037] In one embodiment, a humidity sensor is provided at the dry gas outlet of the evaporator.

[0038] In one embodiment, the heat exchange support is further provided with a plurality of fins 112, which are in contact with the second heat exchange tube and the third heat exchange tube respectively.

[0039] In one embodiment, the evaporator has an outlet pipe at the dry gas outlet and an inlet pipe at the air inlet. A return branch is connected between the outlet pipe and the inlet pipe, and a control valve is provided on the return branch. The control valve is electrically connected to the humidity sensor.

[0040] The working principle and process of this utility model:

[0041] Moist, hot air enters the evaporator through the air inlet, passes through the second heat exchange tube, and exits through the cooling gas outlet into the air-water separator to remove moisture. Coolant enters the evaporator through the coolant inlet, passes through the third heat exchange tube, and flows back to the cooler through the coolant outlet. At this time, the moist, hot air exchanges heat with the coolant and then passes through the subsequent air-water separator to remove water and become dry, low-temperature air. The dry, low-temperature air enters the evaporator through the dry gas inlet, passes through the first heat exchange tube, and exits into the atmosphere through the dry gas outlet. At this time, the dry, low-temperature air exchanges heat with the moist, hot air, and its temperature rises.

[0042] Finally, it should be noted that this embodiment is only for illustrating the present invention and does not limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A recirculating refrigeration compressed air dryer characterized by: The circulating refrigeration compressed air dryer comprises an evaporator (1), a cooler (2), a compressor (3), an air-water separator (4) and an expansion valve (5), the evaporator comprises a shell (101), first heat exchange pipes (108), second heat exchange pipes (109), third heat exchange pipes (110) and a heat exchange support (111), the shell is provided with an air inlet (102), a cooling gas outlet (103), a dry gas inlet (104), a dry gas outlet (105), a cooling liquid inlet (106) and a cooling liquid outlet (107), the first heat exchange pipes are connected with the dry gas inlet and the dry gas outlet, the second heat exchange pipes are arranged around the periphery of the first heat exchange pipes, the second heat exchange pipes are connected with the air inlet and the cooling gas outlet, the heat exchange support is fixed in the shell, the second heat exchange pipes are attached to the heat exchange support, and the third heat exchange pipes are arranged around the periphery of the heat exchange support and are connected with the cooling liquid inlet and the cooling liquid outlet. The evaporator is connected with the air-water separator and the cooler through pipelines respectively, the cooler is connected with the compressor through a pipeline, and the expansion valve is arranged on the pipeline connecting the cooler and the compressor.

2. Recirculating refrigerated compressed air dryer according to claim 1, characterized in that: The circulating refrigeration compressed air dryer further comprises a filter (6), and the filter is connected with the evaporator through a pipeline.

3. Recirculating refrigeration compressed air dryer according to claim 2, characterized in that: The filter is connected with the air inlet of the evaporator through a pipeline.

4. The recirculating, refrigerated compressed air desiccant of claim 1, wherein: The circulating refrigeration compressed air dryer further comprises a pre-cooler (7), and the pre-cooler is connected with the filter through a pipeline.

5. Recirculating refrigeration compressed air dryer according to claim 4, characterized in that: The pre-cooler is connected with the air inlet of the evaporator through a pipeline.

6. The recirculating, refrigerated compressed air desiccant of claim 1, wherein: The cooler is provided with a first inlet and a first outlet, the first inlet is connected with the cooling liquid outlet through a pipeline, and the first outlet is connected with the cooling liquid inlet through a pipeline.

7. The recirculating, refrigerated compressed air desiccant of claim 1, wherein: The cooler is provided with a second inlet and a second outlet, the second inlet is connected with the outlet of the compressor through a pipeline, and the second outlet is connected with the inlet of the compressor through a pipeline.

8. The recirculating, refrigerated compressed air desiccant of claim 1, wherein: The dry gas outlet of the evaporator is provided with a humidity sensor.

9. The recirculating, refrigerated compressed air desiccant of claim 1, wherein: The heat exchange support is further provided with a plurality of fins (112), and the fins are respectively in contact with the second heat exchange pipes and the third heat exchange pipes.

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