Freezing dryer with heat recovery function

Abstract

The utility model discloses a refrigerated dryer with a heat recovery function, which belongs to the technical field of air dryers, solves the problem of heat energy waste caused by the fact that an existing device does not recover heat energy of high-temperature and high-pressure gas compressed by a refrigerant compressor, and comprises a heat recovery exchanger. A water outlet of the heat recovery exchanger is communicated with the inner barrel through a connecting pipe, the inner barrel is fixedly sleeved with a heating barrel, the input end of the refrigerant compressor is communicated with the heating barrel through a connecting pipe, cold water in the heat recovery exchanger exchanges heat with high-pressure gas, and the cold water is heated and then discharged into the inner barrel. The heating barrel is arranged in the heat recovery exchanger, the gas in the heating barrel is pressurized and heated, and then the gas in the heating barrel is conveyed into the refrigerant compressor through the air pump, so that a refrigerant in the refrigerant compressor is conveniently pressurized, the heat in the heat recovery exchanger is recycled, and the consumption of the refrigerant compressor during compression of the refrigerant is favorably reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air dryers, in particular to a refrigerated dryer with heat recovery. Background Art

[0002] When the refrigerated dryer is working, it lowers the temperature of the compressed air to reduce the water vapor content in the compressed air. The excess water vapor will condense into liquid and then the liquid water will be removed, thereby achieving the effect of drying the compressed air.

[0003] After searching, the application with patent number CN202321384905.4 discloses a refrigerated air dryer, which includes a refrigerant compressor; the refrigerant compressor compresses the refrigerant from low-temperature and low-pressure gas into high-temperature and high-pressure gas, and then flows into the condenser through the pipeline to be condensed into high-pressure liquid, and the high-pressure liquid is reduced in pressure through the expansion valve through the pipeline to become a low-pressure liquid and then flows into the evaporator, and the low-pressure liquid undergoes a phase change in the evaporator to become a low-pressure gas and absorbs ambient heat; it also includes a precooler, a filter and a cyclone separator;

[0004] Although the refrigerated air dryer is configured with a precooler to "recover" the cold carried by the air after being cooled by the evaporator, the refrigerated air dryer does not recover the heat energy of the high-temperature and high-pressure gas compressed by the refrigerant compressor, resulting in a waste of heat energy.

[0005] Therefore, we proposed a refrigerated dryer with heat recovery. Utility Model Content

[0006] In view of the deficiencies of the prior art, the utility model provides a refrigerated dryer with heat recovery, which solves the problem that the prior devices fail to recover the heat energy of the high-temperature and high-pressure gas compressed by the refrigerant compressor, resulting in heat energy waste.

[0007] To achieve the above objectives, the utility model is implemented through the following technical solutions: a heat recovery type refrigeration dryer, comprising a box body, a refrigerant compressor is fixedly installed on the bottom surface of the box body;

[0008] The output end of the refrigerant compressor is connected to the input end of the heat recovery exchanger through a connecting pipe, the water outlet of the heat recovery exchanger is connected to the inner barrel through a connecting pipe, a heating barrel is fixedly mounted on the outside of the inner barrel, the side wall of the heating barrel is connected to the air pump through an air pipe, the input end of the refrigerant compressor is connected to the heating barrel through a connecting pipe, and the output end of the heat recovery exchanger is connected to the input end of the condenser through a connecting pipe.

[0009] Preferably, the output end of the condenser is connected to the input end of the evaporator through a connecting pipe, wherein the gas is condensed into high-pressure liquid by the condenser, and then the high-pressure liquid is converted into low-pressure gas by the evaporator and absorbs ambient heat.

[0010] Preferably, the output end of the evaporator is connected to the filter and the precooler in sequence through a connecting pipe, and the air outlet end of the precooler is fixedly connected to an air outlet pipe, wherein impurities in the gas are absorbed by the filter.

[0011] Preferably, the output end of the refrigerant compressor is connected to the evaporator through a pipeline equipped with a bypass valve, wherein the bypass valve can adjust the flow rate of refrigerant according to the requirements of load changes.

[0012] Preferably, an expansion valve is fixedly installed on the pipeline between the condenser and the evaporator, wherein the high-pressure liquid can be decompressed by the expansion valve to become a low-pressure liquid.

[0013] Preferably, the evaporator is fixedly mounted on the side wall of the box body, which facilitates fixing the evaporator.

[0014] The utility model provides a refrigerated dryer with heat recovery function, which has the following beneficial effects:

[0015] The heat recovery type refrigeration dryer compresses the refrigerant from low-temperature and low-pressure gas into high-temperature and high-pressure gas through a refrigerant compressor, and then the high-temperature and high-pressure gas discharged from the refrigerant compressor exchanges heat with cold water in a heat recovery exchanger, and the cold water is heated and discharged into the interior of the inner barrel, and heats the gas inside the heating barrel, while increasing the pressure of the gas inside the heating barrel, and then the gas inside the heating barrel is transported to the interior of the refrigerant compressor through an air pump, so as to pressurize the refrigerant inside the refrigerant compressor, thereby achieving the recycling of heat inside the heat recovery exchanger, which is beneficial to reducing the consumption of the refrigerant compressor when compressing the refrigerant, and solving the problem that the existing device does not recover the heat energy of the high-temperature and high-pressure gas compressed by the refrigerant compressor, resulting in heat energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the heating barrel structure of the utility model;

[0019] Figure 4 It is a schematic diagram of the workflow of the utility model.

[0020] In the figure: 1, box body; 2, refrigerant compressor; 3, heat recovery exchanger; 4, heating barrel; 41, inner barrel; 42, gas pipe; 5, condenser; 6, evaporator; 7, filter; 8, precooler; 81, outlet pipe. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example 1

[0022] like Figure 1-4 As shown: it includes a box body 1, a refrigerant compressor 2 is fixedly installed on the bottom surface of the box body 1, the output end of the refrigerant compressor 2 is connected to the input end of the heat recovery exchanger 3 through a connecting pipe, the water outlet of the heat recovery exchanger 3 is connected to the inner barrel 41 through a connecting pipe, a heating barrel 4 is fixedly sleeved on the outside of the inner barrel 41, the side wall of the heating barrel 4 is connected to the air pump through an air pipe 42, the input end of the refrigerant compressor 2 is connected to the heating barrel 4 through a connecting pipe, and the output end of the heat recovery exchanger 3 is connected to the input end of the condenser 5 through a connecting pipe. Example 2

[0023] like Figure 2 and 3 As shown: the output end of the condenser 5 is connected to the input end of the evaporator 6 through a connecting pipe, the output end of the evaporator 6 is connected to the filter 7 and the precooler 8 in sequence through a connecting pipe, the air outlet end of the precooler 8 is fixedly connected to the air outlet pipe 81, the output end of the refrigerant compressor 2 is connected to the evaporator 6 through a pipeline equipped with a bypass valve, an expansion valve is fixedly installed on the pipeline between the condenser 5 and the evaporator 6, and the evaporator 6 is fixedly installed on the side wall of the cabinet 1.

[0024] The working principle and use process of the utility model: when the heat recovery type refrigeration dryer is used, the refrigerant is compressed from low-temperature and low-pressure gas into high-temperature and high-pressure gas through the refrigerant compressor 2, and then the high-temperature and high-pressure gas discharged from the refrigerant compressor 2 exchanges heat with cold water in the heat recovery exchanger 3. After the cold water is heated, it is discharged into the interior of the inner barrel 41 and heats the gas inside the heating barrel 4. At the same time, the pressure of the gas inside the heating barrel 4 can be increased. Then, the gas inside the heating barrel 4 is transported to the interior of the refrigerant compressor 2 through the air pump, which is convenient for pressurizing the refrigerant inside the refrigerant compressor 2. The high-temperature and high-pressure gas is then transferred to the inner barrel 41 through the heat recovery exchanger 3. The air is transported to the condenser 5 and condensed into a high-pressure liquid. The high-pressure liquid is reduced in pressure into a low-pressure liquid through an expansion valve through a pipeline and then flows into the evaporator 6. The low-pressure liquid is converted into a low-pressure gas in the evaporator 6 and absorbs the surrounding heat. The gas is then filtered by the filter 7 to become dry cold air and discharged through the precooler 8. After the gas is condensed into a high-pressure liquid through the condenser 5, it is converted into a low-pressure gas through the evaporator 6 and absorbs the surrounding heat. The impurities in the gas are absorbed by the filter 7. The bypass valve can adjust the amount of refrigerant passing through it according to the requirements of load changes. The expansion valve can reduce the pressure on the high-pressure liquid to make it a low-pressure liquid.

[0025] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A refrigerated dryer with heat recovery, comprising a housing (1), a refrigerant compressor (2) being fixedly mounted on the bottom surface of the housing (1); Features: The output end of the refrigerant compressor (2) is connected to the input end of the heat recovery exchanger (3) through a connecting pipe, the water outlet of the heat recovery exchanger (3) is connected to the inner barrel (41) through a connecting pipe, the inner barrel (41) is fixedly sleeved with a heating barrel (4) on the outside, the side wall of the heating barrel (4) is connected to the air pump through an air supply pipe (42), the input end of the refrigerant compressor (2) is connected to the heating barrel (4) through a connecting pipe, and the output end of the heat recovery exchanger (3) is connected to the input end of the condenser (5) through a connecting pipe.

2. A heat recovery refrigeration dryer according to claim 1, characterized in that: The output end of the condenser (5) is connected to the input end of the evaporator (6) via a connecting pipe.

3. A heat recovery refrigeration dryer according to claim 2, characterized in that: The output end of the evaporator (6) is connected to the filter (7) and the precooler (8) in sequence through a connecting pipe, and the air outlet end of the precooler (8) is fixedly connected to an air outlet pipe (81).

4. A heat recovery refrigeration dryer according to claim 1, characterized in that: The output end of the refrigerant compressor (2) is connected to the evaporator (6) via a pipeline equipped with a bypass valve.

5. A heat recovery refrigeration dryer according to claim 2, characterized in that: An expansion valve is fixedly installed on the pipeline between the condenser (5) and the evaporator (6).

6. A heat recovery refrigeration dryer according to claim 2, characterized in that: The evaporator (6) is fixedly mounted on the side wall of the box body (1).

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