Heat exchange, air supply and enthalpy increase device for refrigerating unit

Abstract

The utility model discloses a heat exchange air supply enthalpy increasing device for a refrigerating unit, which comprises a compressor and an evaporator, an inlet of the compressor is fixedly connected with an air return pipe, the other end of the air return pipe is fixedly connected with an outlet of the evaporator, and one side of the evaporator is fixedly connected with a supercooling main liquid pipe. The end, away from the evaporator, of the supercooling main liquid pipe is fixedly connected with a plate exchange type enthalpy increasing device, and the other side of the plate exchange type enthalpy increasing device is fixedly connected with a main liquid supply pipe. The secondary heat exchange air supply enthalpy increasing device is simple in structure and control, few in parts, small in size, convenient to connect and high in practicability, heat released by a refrigerant in the process can be effectively utilized, the energy utilization rate is increased, energy consumption is reduced, loads of all assemblies of a refrigerating unit can be reduced, and the refrigerating unit is convenient to use. The possibility that the refrigerating unit breaks down in the operation process is reduced, and the stability and reliability of the system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration equipment units, in particular to a heat exchange, air supplement and enthalpy increasing device for refrigeration units. Background Art

[0002] Refrigeration units are usually composed of components such as compressors, condensers, evaporators and throttle valves (or expansion valves). These components work together to transfer heat from one area to another to reduce or maintain the temperature of the target area, realize the refrigeration cycle, and thus achieve the refrigeration effect. Refrigeration units are widely used in commercial, industrial and household fields, such as air-conditioning systems, cold storage, freezing equipment, etc. They can provide a comfortable indoor environment, keep food and other items fresh, and play an important role in many industries.

[0003] During the refrigeration process of existing refrigeration units, the temperature of the refrigerant in the evaporator cannot be sufficiently reduced, resulting in a decrease in evaporation efficiency, thereby affecting the efficiency and performance of the entire refrigeration process, and being unable to fully utilize the heat absorbed and released by the refrigerant. This means that the refrigeration unit needs to consume more electricity to maintain its refrigeration effect, and the energy consumption is relatively high. In addition, existing refrigeration units are easily affected by factors such as unbalanced refrigerant flow and excessive compressor load, which shortens their service life. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the existing refrigeration units have high energy consumption, low refrigeration efficiency, are prone to failure and have a short lifespan.

[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is: a heat exchange, air supplement and reheat increasing device for a refrigeration unit, including a compressor and an evaporator, the compressor inlet is fixedly connected to a return air pipe, the other end of the return air pipe is fixedly connected to the evaporator outlet, one side of the evaporator is fixedly connected to a subcooling main liquid pipe, the end of the subcooling main liquid pipe away from the evaporator is fixedly connected to a plate-type reheat increaser, and the other side of the plate-type reheat increaser is fixedly connected to a main liquid supply pipe.

[0006] Through the above technical solution, the plate heat exchanger enthalpy increaser can effectively increase the enthalpy value of the refrigerant, which helps to improve the refrigeration efficiency of the evaporator. By arranging the enthalpy increaser on the subcooling main liquid pipe, the enthalpy value of the refrigerant can be increased before entering the evaporator, so that it absorbs more heat in the evaporator, thereby improving the efficiency of the entire refrigeration system.

[0007] The utility model is further configured such that a drying filter barrel is fixedly connected to the main liquid supply pipe, an angle valve is fixedly connected to the main liquid supply pipe, a condenser is arranged on one side of the evaporator, and one end of the main liquid supply pipe away from the plate-exchange enthalpy increaser is fixedly connected to the condenser.

[0008] Through the above technical solution, the angle valve can be used to adjust and control the flow rate of the refrigerant. By adjusting the opening degree of the angle valve, the flow rate of the refrigerant in the refrigeration system can be adjusted to meet the needs under different load conditions, which helps to optimize the performance of the refrigeration system and ensure that the system can operate stably under various working conditions.

[0009] The utility model is further configured such that a main liquid circuit expansion valve is fixedly connected to one end of the subcooling main liquid pipe close to the evaporator, a main liquid circuit solenoid valve is fixedly connected to the subcooling main liquid pipe, an electric control box is arranged on one side of the evaporator, and the electric control box is electrically connected to the main liquid circuit solenoid valve.

[0010] Through the above technical solution, installing the main liquid circuit expansion valve close to the evaporator can ensure that the refrigerant is properly expanded and controlled before entering the evaporator, which helps to optimize the working conditions of the evaporator, ensure that it can fully absorb external heat and evaporate the refrigerant, and improve the performance of the entire refrigeration system.

[0011] The utility model is further configured such that an enthalpy increaser liquid supply pipe is fixedly connected to the subcooling main liquid pipe, one end of the enthalpy increaser liquid supply pipe away from the subcooling main liquid pipe is fixedly connected to the plate-exchange enthalpy increaser, an enthalpy increaser expansion valve is fixedly connected to the enthalpy increaser liquid supply pipe, and an enthalpy increaser solenoid valve is fixedly connected to the enthalpy increaser liquid supply pipe.

[0012] Through the above technical scheme, the enthalpy increaser expansion valve can adjust the evaporation amount of the refrigerant as needed, thereby reducing energy consumption. The enthalpy increaser solenoid valve can be closed when the refrigeration system does not need to work to avoid energy waste. The enthalpy increaser expansion valve and the enthalpy increaser solenoid valve can effectively control the import and export of the refrigerant to avoid safety hazards in the refrigeration system due to excessive pressure or abnormal refrigerant flow.

[0013] The utility model is further configured that an air supply pipe is fixedly connected to one side of the plate-exchange type enthalpy increaser, and an end of the air supply pipe away from the plate-exchange type enthalpy increaser is fixedly connected to the air supply port in the middle of the compressor.

[0014] Through the above technical scheme, the refrigerant liquid after throttling and expansion on the air replenishment and enthalpy increase side absorbs the heat of the main liquid circuit, so that the refrigerant is vaporized after absorbing heat and finally flows into the middle air replenishment port of the refrigeration compressor. Due to the increase in air intake volume, the compression effect of the compressor is improved.

[0015] The utility model is further configured that the compressor outlet is fixedly connected to an exhaust pipe, and one end of the exhaust pipe away from the compressor is fixedly connected to the evaporator.

[0016] The beneficial effects of the utility model are as follows:

[0017] The utility model is provided with a secondary heat exchange and air-increasing enthalpy increasing device which is composed of a plate-exchange type enthalpy increaser, an enthalpy increaser expansion valve, an enthalpy increaser solenoid valve, an enthalpy increaser liquid supply pipe, an air-increasing pipe, etc. The secondary heat exchange and air-increasing enthalpy increasing device can effectively utilize the heat released by the refrigerant in the process, improve the energy utilization rate, and thus reduce energy consumption; and the secondary heat exchange and air-increasing enthalpy increasing device can help the refrigerant to absorb heat more fully in the evaporator, improve the evaporation efficiency, accelerate the refrigeration speed, and improve the efficiency and performance of the entire refrigeration process; because the secondary heat exchange and air-increasing enthalpy increasing device can balance the refrigerant flow, reduce the unstable factors in the refrigeration system, reduce the load of each component of the refrigeration unit, and reduce the pressure and temperature during operation, the possibility of failure of the refrigeration unit during operation is reduced, the wear rate of the equipment is slowed down, the stability and reliability of the system are improved, and the service life of the equipment is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0019] Figure 2 It is a three-dimensional structural diagram of the drying and filtering barrel of the utility model.

[0020] In the figure: 1. compressor; 2. evaporator; 3. condenser; 4. electric control box; 5. exhaust pipe; 6. return air pipe; 7. main liquid circuit expansion valve; 8. subcooling main liquid pipe; 9. enthalpy increaser liquid supply pipe; 10. enthalpy increaser solenoid valve; 11. plate-changing enthalpy increaser; 12. angle valve; 13. main liquid supply pipe; 14. drying filter barrel; 15. air supply pipe; 16. main liquid circuit solenoid valve; 17. enthalpy increaser expansion valve. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0022] See also Figure 1 and Figure 2 A heat exchange, air supplement and reheat increasing device for a refrigeration unit includes a compressor 1 and an evaporator 2. The inlet of the compressor 1 is fixedly connected to a return air pipe 6, and the other end of the return air pipe 6 is fixedly connected to the outlet of the evaporator 2. One side of the evaporator 2 is fixedly connected to a subcooling main liquid pipe 8, and the end of the subcooling main liquid pipe 8 away from the evaporator 2 is fixedly connected to a plate-type reheat increaser 11, and the other side of the plate-type reheat increaser 11 is fixedly connected to a main liquid supply pipe 13.

[0023] A drying filter barrel 14 is fixedly connected to the main liquid supply pipe 13, an angle valve 12 is fixedly connected to the main liquid supply pipe 13, a condenser 3 is arranged on one side of the evaporator 2, and the end of the main liquid supply pipe 13 away from the plate-type enthalpy increaser 11 is fixedly connected to the condenser 3; the end of the subcooling main liquid pipe 8 close to the evaporator 2 is fixedly connected to the main liquid circuit expansion valve 7, and the subcooling main liquid pipe 8 is fixedly connected to the main liquid circuit solenoid valve 16, an electric control box 4 is arranged on one side of the evaporator 2, and the electric control box 4 is electrically connected to the main liquid circuit solenoid valve 16.

[0024] An enthalpy increaser liquid supply pipe 9 is fixedly connected to the subcooling main liquid pipe 8, and one end of the enthalpy increaser liquid supply pipe 9 away from the subcooling main liquid pipe 8 is fixedly connected to the plate-type enthalpy increaser 11, and an enthalpy increaser expansion valve 17 is fixedly connected to the enthalpy increaser liquid supply pipe 9, and an enthalpy increaser solenoid valve 10 is fixedly connected to the enthalpy increaser liquid supply pipe 9; an air supply pipe 15 is fixedly connected to one side of the plate-type enthalpy increaser 11, and one end of the air supply pipe 15 away from the plate-type enthalpy increaser 11 is fixedly connected to the air supply port in the middle of the compressor 1; an exhaust pipe 5 is fixedly connected to the outlet of the compressor 1, and one end of the exhaust pipe 5 away from the compressor 1 is fixedly connected to the evaporator 2.

[0025] When the utility model is in use, the refrigerant is compressed by the compressor 1 and becomes a high-temperature and high-pressure gaseous refrigerant and is discharged into the condenser 3. The high-temperature and high-pressure gaseous refrigerant exchanges heat with an external cold source in the condenser 3 and becomes a medium-temperature and high-pressure liquid refrigerant. After being dried by the drying filter barrel 14, it enters the main liquid circuit expansion valve 7. The main liquid circuit expansion valve 7 intercepts and releases the pressure of the medium-temperature and high-pressure liquid refrigerant. After the medium-temperature and high-pressure liquid refrigerant passes through the main liquid circuit expansion valve 7 and releases the pressure, it enters the evaporator 2 and becomes a low-temperature and low-pressure gaseous refrigerant to form evaporation and cooling. The low-temperature and low-pressure gaseous refrigerant exchanges heat with the medium to be refrigerated in the evaporator 2, and the gaseous refrigerant is transported to the compressor 1 through the return air pipe 6 to realize the refrigeration cycle. When the liquid refrigerant reaches the set value and passes through the plate-type refrigerant increaser 11, the main liquid circuit solenoid valve 16 on the main liquid supply pipe 13 is energized, so that the refrigerant diverted from the main liquid circuit of the unit and the plate-type refrigerant increaser 11 are guided The low-temperature and low-pressure refrigerant liquid enters the plate-exchange enthalpy increaser 11 and undergoes indirect heat exchange with the relatively high-temperature and high-pressure refrigerant liquid in the supercooled main liquid pipe 8, thereby reducing the temperature of the refrigerant liquid in the supercooled main liquid pipe 8 and allowing it to be fully cooled, that is, increasing the degree of supercooling, providing favorable conditions for subsequent evaporation. At the same time, the refrigerant liquid after throttling expansion on the air replenishment enthalpy increase side absorbs the heat of the main liquid circuit, causing the refrigerant to vaporize after absorbing heat, and finally flows into the middle air replenishment port of the refrigeration compressor 1 through the air replenishment pipe 15. The compression effect of the compressor 1 is improved due to the increase in air intake volume. Because the refrigerant gas entering the compression chamber is low-temperature, the temperature of the compression chamber can be reduced, thereby reducing the exhaust temperature on the high-pressure side of the compressor 1. The reduction in exhaust temperature also makes the operating conditions of the entire refrigeration unit more superior, which is of epoch-making significance for improving the stable operation, energy efficiency, energy conservation and emission reduction of the low-temperature water-discharging refrigeration unit.

[0026] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A heat exchange, air supplement and enthalpy increase device for a refrigeration unit, comprising a compressor (1) and an evaporator (2), characterized in that: The compressor (1) inlet is fixedly connected to a return air pipe (6), the other end of the return air pipe (6) is fixedly connected to the evaporator (2) outlet, one side of the evaporator (2) is fixedly connected to a subcooling main liquid pipe (8), one end of the subcooling main liquid pipe (8) away from the evaporator (2) is fixedly connected to a plate-type enthalpy increaser (11), and the other side of the plate-type enthalpy increaser (11) is fixedly connected to a main liquid supply pipe (13).

2. The heat exchange and air supplementing enthalpy increasing device for a refrigeration unit according to claim 1, characterized in that: The main liquid supply pipe (13) is fixedly connected to a drying filter barrel (14), the main liquid supply pipe (13) is fixedly connected to an angle valve (12), a condenser (3) is arranged on one side of the evaporator (2), and one end of the main liquid supply pipe (13) away from the plate-type enthalpy increaser (11) is fixedly connected to the condenser (3).

3. The heat exchange and air supplementing enthalpy increasing device for a refrigeration unit according to claim 1, characterized in that: One end of the subcooling main liquid pipe (8) close to the evaporator (2) is fixedly connected to a main liquid circuit expansion valve (7), and the subcooling main liquid pipe (8) is fixedly connected to a main liquid circuit solenoid valve (16). An electric control box (4) is provided on one side of the evaporator (2), and the electric control box (4) is electrically connected to the main liquid circuit solenoid valve (16).

4. The heat exchange and air supplementing enthalpy increasing device for a refrigeration unit according to claim 1, characterized in that: The subcooling main liquid pipe (8) is fixedly connected to an enthalpy increaser liquid supply pipe (9); one end of the enthalpy increaser liquid supply pipe (9) away from the subcooling main liquid pipe (8) is fixedly connected to a plate-exchange type enthalpy increaser (11); the enthalpy increaser liquid supply pipe (9) is fixedly connected to an enthalpy increaser expansion valve (17); and the enthalpy increaser liquid supply pipe (9) is fixedly connected to an enthalpy increaser solenoid valve (10).

5. The heat exchange and air supplementing enthalpy increasing device for a refrigeration unit according to claim 1, characterized in that: An air supply pipe (15) is fixedly connected to one side of the plate-exchange type enthalpy increaser (11); an end of the air supply pipe (15) away from the plate-exchange type enthalpy increaser (11) is fixedly connected to an air supply port in the middle of the compressor (1).

6. The heat exchange and air supplementing enthalpy increasing device for a refrigeration unit according to claim 1, characterized in that: The compressor (1) outlet is fixedly connected to an exhaust pipe (5), and one end of the exhaust pipe (5) away from the compressor (1) is fixedly connected to the evaporator (2).

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