Multi-stage efficient evaporative cooling water chilling unit

Abstract

The utility model discloses a multi-stage efficient evaporative cooling water chilling unit, which relates to the technical field of cooling equipment and comprises a first air pipe, a compressor, a second air pipe and an evaporative cooling unit, one end of the first air pipe is connected with an evaporator, and the other end of the first air pipe is communicated with a four-way valve. The four-way valve is communicated with the input end and the output end of the compressor, the four-way valve is further communicated with the first ball valve and the second ball valve, a cooling loop is prolonged on the basis of an existing water chilling unit, the evaporation chilling unit is additionally arranged on an original cooling loop, and on the premise that the refrigerant filling amount of an original system is not affected as much as possible, the refrigerant filling amount of the system is reduced. The condensation area of an evaporation cooling unit is designed according to the fact that 25%-50% of condensation heat dissipating capacity is digested, the operation high pressure is reduced so that the energy efficiency of the product can be improved, a compressor can also operate in the optimal environment, and therefore the evaporation cooling unit can be suitable for extreme high-temperature weather, and meanwhile the service life of the compressor can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling equipment, in particular to a multi-stage high-efficiency evaporative cooling chiller. Background Art

[0002] Currently, circulating (industrial) chillers use a refrigerant cycle to transfer heat to cool or heat industrial processes or fluids. The main components in the refrigerant cycle are the compressor, condenser, and expansion valve (see Figure 2 ); however, the air conditioner connected to the chiller runs under high pressure for a long time under extremely high temperature weather conditions, which causes a large load on the compressor, which in turn easily shortens the life of the compressor. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a multi-stage high-efficiency evaporative cooling chiller, which solves the problem in the background technology that the air conditioner connected to the existing chiller is always in a high-pressure state when running for a long time in extremely high temperature weather, thereby causing a large load on the compressor, which in turn easily shortens the life of the compressor.

[0004] To achieve the above purpose, the utility model is implemented through the following technical solutions: a multi-stage high-efficiency evaporative cooling chiller, comprising a first air pipe, a compressor, a second air pipe and an evaporative cooling unit, wherein one end of the first air pipe is connected to the evaporator, and the other end of the first air pipe is connected to a four-way valve, the four-way valve is connected to the input end and the output end of the compressor respectively, and the four-way valve is also connected to the first ball valve and the second ball valve respectively, the other end of the second ball valve is connected to the fourth ball valve through the second air pipe, and the fourth ball valve is connected to the cold evaporating unit;

[0005] The cold evaporator unit is connected to one end of the second liquid pipe through a water pump, and a controller is installed at the connection end between the second liquid pipe and the evaporative cold unit. A temperature sensor is arranged inside the controller, and the temperature sensor is used to monitor the cold steam outlet temperature. The second liquid pipe is connected to the condenser, and a third ball valve is arranged between the condenser and the second liquid pipe. The condenser is connected to the first liquid pipe, and an electronic expansion valve is arranged between the first liquid pipe and the condenser. The other end of the first liquid pipe is connected to the evaporator.

[0006] Preferably, the second air pipe and the second liquid pipe are connected to each other through a first ball valve, the connecting end of the first ball valve and the second air pipe is located between the second ball valve and the four-way valve, and the connecting end of the first ball valve and the second liquid pipe is located between the third ball valve and the condenser.

[0007] Preferably, the compressor is provided with a temperature monitoring device and a pressure monitoring device, wherein the temperature monitoring device is used to monitor the refrigerant temperature at the input and output ends of the compressor, and the pressure monitoring device is used to monitor the refrigerant pressure at the input and output ends of the compressor.

[0008] Preferably, the compressor, the four-way valve, the first ball valve, the condenser, and the electronic expansion valve are connected in sequence to form a heating circuit, and when the first ball valve is opened, the second ball valve and the third ball valve are in a closed state.

[0009] Preferably, the compressor, four-way valve, second ball valve, evaporative cooling unit, water pump, third ball valve, and condenser electronic expansion valve are connected in sequence to form a refrigeration circuit, and when the second ball valve and the third ball valve are opened, the first ball valve is in a closed state.

[0010] Preferably, at least a portion of the second gas pipe and the second liquid pipe forms a coil, and the evaporative cooling unit exchanges heat with the coil portion of the second gas pipe and the second liquid pipe.

[0011] The utility model provides a multi-stage high-efficiency evaporative cooling chiller. It has the following beneficial effects:

[0012] The multi-stage high-efficiency evaporative cooling chiller extends the cooling circuit on the basis of the existing chiller, adds an evaporative cooling unit to the original cooling circuit, and designs the condensing area of ​​the evaporative cooling unit according to 25% to 50% of the condensation heat dissipation of the evaporative cooling product under the premise of not affecting the refrigerant charge of the original system as much as possible, thereby reducing the operating high pressure and improving the product energy efficiency. The compressor can also operate in the most optimized environment, so it can be used in extremely high temperature weather, and at the same time it is beneficial to increase the life of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the module of the utility model;

[0014] Figure 2 This is a schematic diagram of the existing unit module.

[0015] In the figure, 1, the first air pipe; 2, the first liquid pipe; 3, the compressor; 4, the four-way valve; 5, the electronic expansion valve; 6, the condenser; 7, the first ball valve; 8, the second ball valve; 9, the third ball valve; 10, the second liquid pipe; 11, the second air pipe; 12, the controller; 13, the water pump; 14, the evaporative cooling unit; 15, the fourth ball valve. DETAILED DESCRIPTION

[0016] 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.

[0017] Embodiment 1:

[0018] See also Figure 1 A multi-stage high-efficiency evaporative cooling chiller comprises a first air pipe 1, a compressor 3, a second air pipe 11 and an evaporative cooling unit 14, one end of the first air pipe 1 is connected to the evaporator, and the other end of the first air pipe 1 is connected to the four-way valve 4, the four-way valve 4 is respectively connected to the input end and the output end of the compressor 3, and the four-way valve 4 is also respectively connected to the first ball valve 7 and the second ball valve 8, the other end of the second ball valve 8 is connected to the fourth ball valve 15 through the second air pipe 11, and the fourth ball valve 15 is connected to the cold evaporation unit; the cold evaporation unit is connected to one end of the second liquid pipe 10 through the water pump 13, and the second A controller 12 is installed at the connection end between the liquid pipe 10 and the evaporative cooling unit 14. A temperature sensor is arranged inside the controller 12. The temperature sensor is used to monitor the outlet temperature of the cold steam. The second liquid pipe 10 is connected to the condenser 6. A third ball valve 9 is arranged between the condenser 6 and the second liquid pipe 10. The condenser 6 is connected to the first liquid pipe 2. An electronic expansion valve 5 is arranged between the first liquid pipe 2 and the condenser 6. The other end of the first liquid pipe 2 is connected to the evaporator. By closing the first ball valve 7 and opening the second ball valve 8 and the third ball valve 9, the unit is started and the evaporative cooling machine is started. After the operation is stable By comparing the refrigerant outlet temperature of the evaporative cooling and the refrigerant saturation temperature corresponding to the high pressure after the unit is started, assuming that the refrigerant saturation temperature of the original unit is 45°C, when the refrigerant outlet temperature after the evaporative cooling is started is lower than the refrigerant saturation temperature of the original unit, it means that there is a temperature difference of 3 degrees, and the purpose of energy saving is achieved. When the outlet temperature of the evaporative cooling is lower than 42 degrees, the low pressure of the unit is 8kg. When the pressure is lower than 8kg, an alarm is prompted. The low pressure is set to be not less than 6kg. The condensing temperature pressure difference can be greater than 3 degrees. The temperature is adjusted by adjusting the water flow rate by the fourth ball valve 15. The water flow rate directly determines the heat taken away and the temperature of the evaporative cooling outlet. By adjusting the size of the fourth ball valve 15, the energy-saving system can run smoothly. By adding the evaporative cooling unit 14 to the original cooling circuit, and under the premise of not affecting the refrigerant filling amount of the original system as much as possible, the evaporative cooling product is designed according to the digestion of 25% to 50% of the condensation heat dissipation to design the condensing area of ​​the evaporative cooling unit, reduce the operating high pressure to improve the product energy efficiency, and the compressor can also operate in the most optimized environment, so that it can be suitable for extremely high temperature weather, and at the same time it is beneficial to increase the life of the compressor.

[0019] Embodiment 2:

[0020] The second air pipe 11 and the second liquid pipe 10 are connected to each other through the first ball valve 7. The connecting end of the first ball valve 7 and the second air pipe 11 is located between the second ball valve 8 and the four-way valve 4. The connecting end of the first ball valve 7 and the second liquid pipe 10 is located between the third ball valve 9 and the condenser 6. The cold and hot circuits of the unit are switched by switching the first ball valve 7. A temperature monitoring device and a pressure monitoring device are provided on the compressor 3. The temperature monitoring device is used to monitor the refrigerant temperature at the input and output ends of the compressor 3. The pressure monitoring device is used to monitor the refrigerant pressure at the input and output ends of the compressor 3, which is beneficial to real-time monitoring of the refrigerant inlet and outlet temperatures of the evaporative cooling product.

[0021] Embodiment 3:

[0022] The compressor 3, the four-way valve 4, the first ball valve 7, the condenser 6, and the electronic expansion valve 5 are connected in sequence to form a heating circuit. When the first ball valve 7 is opened, the second ball valve 8 and the third ball valve 9 are in a closed state; the compressor 3, the four-way valve 4, the second ball valve 8, the evaporative cooling unit 14, the water pump 13, the third ball valve 9, the condenser 6, and the electronic expansion valve 5 are connected in sequence to form a refrigeration circuit. When the second ball valve 8 and the third ball valve 9 are opened, the first ball valve 7 is in a closed state. By closing the first ball valve 7, the second ball valve 8 and the third ball valve 9 are opened. Ball valve 9, when the unit is turned on for cooling operation, the evaporative heat exchanger is at the low-pressure side when the heating operation is performed. It is necessary to close the second ball valve 8 and the third ball valve 9 and open the first ball valve 7 to close the evaporative heat exchanger, and the refrigerant returns to the compressor 3 through the bypass pipe; at least a portion of the second air pipe 11 and the second liquid pipe 10 form a coil, and the evaporative cooling unit 14 exchanges heat with the coil part of the second air pipe 11 and the second liquid pipe 10. The coil-like structure is conducive to improving the heat exchange efficiency of the second air pipe 11 and the second liquid pipe 10 and the evaporative cooling unit 14.

[0023] Working principle: by closing the first ball valve 7, opening the second ball valve 8 and the third ball valve 9, the unit is started for refrigeration operation, the compressor 3 compresses the air, and compresses the low-temperature, low-pressure condensing air into high-temperature, high-pressure hot compressed air, and the hot compressed air enters the evaporative cooling unit 14 with heat energy, the evaporative cooling unit 14 absorbs heat energy, releases heat, and the condensed air is discharged and returns to a low-temperature, low-pressure state; the low-temperature, low-pressure condensing air is drawn into the condenser 6, and is heated again in the condenser 6 to become low-temperature steam, and at the same time the condenser 6 cools the low-temperature cooling water; the low-temperature steam passes through the expansion valve, is converted into a low-temperature, low-pressure state, and enters the compressor 3 again for circulation processing, thereby achieving the refrigeration effect of the evaporative cooling chiller.

[0024] 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 defined 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.

[0025] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A multi-stage high-efficiency evaporative cooling chiller, characterized in that: The invention comprises a first air pipe (1), a compressor (3), a second air pipe (11) and an evaporative cooling unit (14); one end of the first air pipe (1) is connected to the evaporator, and the other end of the first air pipe (1) is connected to a four-way valve (4); the four-way valve (4) is connected to the input end and the output end of the compressor (3) respectively, and the four-way valve (4) is also connected to the first ball valve (7) and the second ball valve (8) respectively; the other end of the second ball valve (8) is connected to the fourth ball valve (15) through the second air pipe (11), and the fourth ball valve (15) is connected to the evaporative cooling unit; The cold evaporator unit is connected to one end of the second liquid pipe (10) through a water pump (13), and a controller (12) is installed at the connection end of the second liquid pipe (10) and the evaporative cold unit (14). A temperature sensor is arranged inside the controller (12), and the temperature sensor is used to monitor the outlet temperature of cold steam. The second liquid pipe (10) is connected to the condenser (6), and a third ball valve (9) is arranged between the condenser (6) and the second liquid pipe (10). The condenser (6) is connected to the first liquid pipe (2), and an electronic expansion valve (5) is arranged between the first liquid pipe (2) and the condenser (6). The other end of the first liquid pipe (2) is connected to the evaporator.

2. A multi-stage high-efficiency evaporative cooling chiller according to claim 1, characterized in that: The second air pipe (11) and the second liquid pipe (10) are connected to each other via a first ball valve (7); a connecting end of the first ball valve (7) and the second air pipe (11) is located between the second ball valve (8) and the four-way valve (4); and a connecting end of the first ball valve (7) and the second liquid pipe (10) is located between the third ball valve (9) and the condenser (6).

3. A multi-stage high-efficiency evaporative cooling chiller according to claim 1, characterized in that: The compressor (3) is provided with a temperature monitoring device and a pressure monitoring device, wherein the temperature monitoring device is used to monitor the refrigerant temperature at the input end and the output end of the compressor (3), and the pressure monitoring device is used to monitor the refrigerant pressure at the input end and the output end of the compressor (3).

4. A multi-stage high-efficiency evaporative cooling chiller according to claim 1, characterized in that: The compressor (3), the four-way valve (4), the first ball valve (7), the condenser (6), and the electronic expansion valve (5) are connected in sequence to form a heating circuit, and when the first ball valve (7) is opened, the second ball valve (8) and the third ball valve (9) are in a closed state.

5. A multi-stage high-efficiency evaporative cooling chiller according to claim 1, characterized in that: The compressor (3), the four-way valve (4), the second ball valve (8), the evaporative cooling unit (14), the water pump (13), the third ball valve (9), the condenser (6) and the electronic expansion valve (5) are connected in sequence to form a refrigeration circuit. When the second ball valve (8) and the third ball valve (9) are opened, the first ball valve (7) is in a closed state.

6. A multi-stage high-efficiency evaporative cooling chiller according to claim 1, characterized in that: At least a portion of the second air pipe (11) and the second liquid pipe (10) forms a coil, and the evaporative cooling unit (14) exchanges heat with the coil portion of the second air pipe (11) and the second liquid pipe (10).

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