Evaporative condenser

Abstract

The utility model provides an evaporative condenser which comprises a shell, a fan, an air-cooled condenser module and an evaporative condenser module, the fan, the air-cooled condenser module and the evaporative condenser module are sequentially installed in the shell from top to bottom, and the evaporative condenser module comprises a heat exchanger, a water disc and a water distribution assembly. A refrigerant is cooled through the air-cooled condenser module and then enters the evaporative condenser module for heat exchange, and therefore the cooling effect is not affected by the environment temperature. The evaporative condenser and the air-cooled condenser are combined, the rotating speed of the fan and the start and stop of the water pump are adjusted through the control system, the application requirements of all-year and all-weather different time periods can be met, the energy-saving benefit is increased, and the cost of the air conditioner is reduced; the system can cope with severe weather such as extremely hot weather and extremely cold weather, the refrigerating system can operate stably, and the reliability of the system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial heat exchange equipment, in particular to an evaporative condenser. Background Art

[0002] The evaporative condenser is one of the main heat exchange components in the refrigeration system. It uses water evaporation and forced air circulation to take away the condensation heat to cool the high-temperature and high-pressure superheated steam discharged from the compressor and condense it into liquid. It combines the shell and tube heat exchanger and cooling tower of the traditional water-cooled unit into one. Compared with the water-cooled unit, it reduces the power consumption of the cooling water pump, has high heat exchange efficiency, and high unit energy efficiency.

[0003] However, the cooling effect of the evaporative condenser is greatly affected by the ambient temperature. If the ambient temperature is too high or too low, it will affect its operating effect. As an important heat exchange device in the circulation process of the refrigeration system, if the water supply is cut off, the refrigeration system may shut down under high pressure. For refrigeration units that operate throughout the year, when the evaporative condenser is shut down, the water pan and cooling water pipeline should be protected from freezing. Generally, electric heaters are used, which results in energy waste. When the evaporative condenser operates at an ambient temperature below the freezing point, the spray water temperature will be lower than the design value, which can easily cause low exhaust pressure of the refrigeration system and affect the stable operation of the compressor. Utility Model Content

[0004] The utility model provides an evaporative condenser to solve the technical problems raised in the background technology.

[0005] The technical solution adopted by the utility model to solve the above technical problems is:

[0006] An evaporative condenser comprises a shell, a fan, an air-cooled condenser module and an evaporative condenser module are sequentially installed in the shell from top to bottom; the fan is located at the air outlet side of the air-cooled condenser module, the evaporative condenser module is located at the air inlet side of the air-cooled condenser module, and the refrigerant circuit between the fan and the air-cooled condenser module is connected in series through a refrigerant connecting pipe; the evaporative condenser module comprises a heat exchanger, a water pan and a water distribution assembly; the water pan is installed at the bottom of the shell, and the heat exchanger is located above the water pan; the water distribution assembly comprises a water pump, a spray pipe and a water distributor, the water distributor is located above the heat exchanger, and is connected to the water pan through a spray pipe, a plurality of nozzles are installed on the water distributor, the spray direction of the nozzles is toward the heat exchanger, and the water pump is installed on the spray pipe.

[0007] As a further preferred embodiment of the present invention, the fan is a variable speed fan.

[0008] As a further preferred embodiment of the present invention, the heat exchanger is a coil heat exchanger or a plate and tube heat exchanger.

[0009] As a further preferred embodiment of the present invention, a drain port is provided at the bottom of one side wall of the shell, the drain port is connected to the bottom wall of the water tray through a drain pipe, and a first electric ball valve is installed on the drain pipe.

[0010] As a further preferred embodiment of the present invention, a water replenishment port is opened on one side wall of the shell and located above the drain port. The water replenishment port is connected to the side wall of the water tray through a water replenishment pipe, and a float valve is installed at the connection portion.

[0011] As a further preferred embodiment of the present invention, a liquid level sensor is installed at the bottom of the water tray.

[0012] As a further preferred embodiment of the utility model, a refrigerant inlet is provided at the top of one side wall of the shell, and the refrigerant inlet is connected to the inlet end of the top of the heat exchanger through a pipe, a pressure sensor is installed on the pipe, and the outlet end of the bottom of the heat exchanger is connected to the inlet end of the heat exchanger.

[0013] As a further preferred embodiment of the present invention, a refrigerant outlet is provided on one side wall of the shell and below the refrigerant inlet, and the refrigerant outlet is connected to an outlet end of the heat exchanger through a pipeline.

[0014] As a further preferred embodiment of the present invention, the heat exchanger is connected by two fins in a "V" shape, the top of the fin is the inlet end, and the bottom is the outlet end.

[0015] As a further preferred embodiment of the present invention, the water replenishment port, the water discharge port, the refrigerant inlet port and the refrigerant outlet port are all arranged on the same side wall of the shell, so as to facilitate the connection of the water channel and the replenishment of the refrigerant.

[0016] As a further preferred embodiment of the present invention, a plurality of air inlets are provided on the side walls of the shell and located on both sides of the air-cooled condenser module and the evaporative condenser module.

[0017] As a further preferred embodiment of the present invention, a humidity sensor is also installed on the top of the shell.

[0018] Compared with the prior art, the utility model has the following advantages or technical effects:

[0019] The refrigerant is cooled by the air-cooled condenser module and then enters the evaporative condenser module for heat exchange, so the cooling effect is not affected by the ambient temperature. When the evaporative condenser is out of water, the liquid level sensor will detect the drop in the liquid level in the water pan at the first time, the system controls the water pump to close, and the fan to run at high speed to ensure that the refrigerant inlet pressure value is lower than the high pressure limit of the compressor, avoiding high-pressure shutdown of the refrigeration system. When the ambient temperature detected by the temperature and humidity sensor is lower than the freezing point, the system controls the first electric ball valve to open, the second electric ball valve to close, and the water pump to close, drain the water in the water pan to avoid freezing of the spray system. The utility model combines the evaporative condenser with the air-cooled condenser, and adjusts the fan speed and the start and stop of the water pump through the control system, which can meet the application needs of different periods throughout the year and all weather, increase energy-saving benefits, and reduce air conditioning costs. The utility model combines the evaporative condenser with the air-cooled condenser, and adjusts the fan speed and the start and stop of the water pump through the control system, which can meet the application needs of different periods throughout the year and all weather, increase energy-saving benefits, and reduce air conditioning costs; it can cope with severe weather such as extreme heat and extreme cold, and the refrigeration system can operate stably, improving the reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention and its features, appearance and advantages will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings. The same reference numerals indicate the same parts in all the drawings. The drawings are not drawn to scale, but the emphasis is on illustrating the subject matter of the present invention.

[0021] Figure 1 It is a structural schematic diagram of an evaporative condenser;

[0022] In the figure, 1. water tray, 2. liquid level sensor, 3. first electric ball valve, 4. drain pipe, 5. drain port, 6. water supply port, 7. second electric ball valve, 8. water supply pipe, 9. float valve, 10. first air inlet, 11. refrigerant outlet, 12. heat exchanger, 13. refrigerant connecting pipe, 14. second air inlet, 15. refrigerant inlet, 16. pressure sensor, 17. fan, 18. humidity sensor, 19. heat exchanger, 20. water distributor, 21. water pump, 22. spray pipe. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention are described below in conjunction with the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the protection scope of the present invention. Example

[0024] Please refer to the attached Figure 1 The utility model provides an evaporative condenser, including a shell, a fan 17, an air-cooled condenser module and an evaporative condenser module installed in the shell from top to bottom. The fan 17 is located on the air outlet side of the air-cooled condenser module, and the evaporative condenser module is located on the air inlet side of the air-cooled condenser module. The refrigerant circuit between the fan 17 and the air-cooled condenser module is connected in series through a refrigerant connecting pipe 13. The evaporative condenser module and the air-cooled condenser module share a fan. The evaporative condenser module includes a heat exchanger 12, a water tray 1 and a water distribution assembly; the water tray 1 is installed at the bottom of the shell, the heat exchanger 12 is located above the water tray 1, and the water distribution assembly includes a water pump 21, a spray pipe 22 and a water distributor 20. The water distributor 20 is located above the heat exchanger 12 and is connected to the water tray 1 through a spray pipe 22. A plurality of nozzles are evenly spaced on the water distributor 20, and the spray direction of the nozzles is toward the heat exchanger 12. The water pump 21 is installed on the spray pipe 22.

[0025] Further explanation, a drain port 5 is provided at the bottom of one side wall of the housing, and the drain port 5 is connected to the bottom wall of the water pan 1 through a drain pipe 4, and a first electric ball valve 3 is installed on the drain pipe 4. A water replenishment port 6 is provided above the drain port 5, and the water replenishment port 6 is connected to the side wall of the water pan 1 through a water replenishment pipe 8, a float valve 9 is installed at the connection, and a second electric ball valve 7 is installed on the water replenishment pipe 8. A liquid level sensor 2 is installed at the bottom of the water pan 1, and the liquid level sensor 2 is used to monitor the liquid level of the water pan 1. When the liquid level is low, the water pump 21 is turned off.

[0026] Further explanation, the air-cooled condenser module includes a heat exchanger 19, a refrigerant inlet 15 is provided at the top of one side wall of the shell, and the refrigerant inlet 15 is connected to the inlet end of the top of the heat exchanger 19 through a pipeline, and a pressure sensor 16 is installed on the pipeline, and the outlet end of the bottom of the heat exchanger 12 is connected to the inlet end of the heat exchanger 19. Figure 1 As shown, the heat exchanger 12 is connected by two fins in a "V" shape, the top of the fin is the inlet end, and the bottom is the outlet end. The water replenishment port 6, the drain port 5, the refrigerant inlet 15 and the refrigerant outlet 11 are all arranged on the same side wall of the shell, which is convenient for the connection of the water channel and the replenishment of the refrigerant.

[0027] To further explain, a second air inlet 14 is provided on both sides of the air-cooled condenser module, and a first air inlet 10 is provided on both sides of the evaporative condenser module. The air from the first air inlet 10 is discharged after heat exchange with the refrigerant in the heat exchanger 12 inside the evaporative condenser module. The discharged hot air is mixed with the air from the second air inlet 14 and then discharged through the fan 17 after heat exchange with the refrigerant in the heat exchanger 19.

[0028] The working principle of the utility model is:

[0029] The high-temperature and high-pressure refrigerant first enters the air-cooled condenser module through the refrigerant inlet 15 for heat exchange. The cooled refrigerant passes through the refrigerant pipeline 13 and then enters the evaporative condenser module for heat exchange. The condensed refrigerant liquid is discharged through the refrigerant outlet 11. In the air-cooled condenser module, the refrigerant exchanges heat with the air outside the heat exchanger 19. In the evaporative condenser module, the refrigerant exchanges heat with the air and spray water outside the heat exchanger 12. The refrigerant inlet pressure detected by the pressure sensor 16 controls the speed of the fan to ensure that the refrigerant inlet pressure value is within a reasonable range and the refrigeration system operates at the optimal energy efficiency.

[0030] When the evaporative condenser is cut off from water, the liquid level detected by the liquid level sensor 2 drops, and the water pump 21 is turned off. To ensure the normal operation of the refrigeration system, the fan runs at high speed to ensure that the refrigerant inlet pressure value is lower than the high pressure limit of the compressor.

[0031] When the ambient temperature detected by the temperature and humidity sensor 18 is below the freezing point, in order to ensure that the spray system does not freeze, the first electric ball valve 3 is opened, the second electric ball valve 7 is closed, the water pump 21 is turned off, and the water in the water tray 1 is drained.

[0032] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. An evaporative condenser, characterized in that: The invention comprises a shell, a fan, an air-cooled condenser module and an evaporative condenser module are sequentially installed in the shell from top to bottom; the fan is located at the air outlet side of the air-cooled condenser module, the evaporative condenser module is located at the air inlet side of the air-cooled condenser module, and the refrigerant circuit between the fan and the air-cooled condenser module is connected in series through a refrigerant connecting pipe; The evaporative condenser module includes a heat exchanger, a water pan and a water distribution assembly; the water pan is installed at the bottom of the shell, and the heat exchanger is located above the water pan; the water distribution assembly includes a water pump, a spray pipe and a water distributor, the water distributor is located above the heat exchanger and is connected to the water pan through a spray pipe, a plurality of nozzles are installed on the water distributor, and the spray direction of the nozzles is toward the heat exchanger, and the water pump is installed on the spray pipe.

2. An evaporative condenser according to claim 1, characterized in that: A drain port is provided at the bottom of one side wall of the shell, and the drain port is connected to the bottom wall of the water tray through a drain pipe, and a first electric ball valve is installed on the drain pipe.

3. An evaporative condenser according to claim 2, characterized in that: A water supply port is provided on one side wall of the shell and above the drain port. The water supply port is connected to the side wall of the water tray through a water supply pipe. A float valve is installed on the connection portion, and a second electric ball valve is installed on the water supply pipe.

4. The evaporative condenser according to claim 1, characterized in that: A liquid level sensor is installed at the bottom of the water tray.

5. The evaporative condenser according to claim 1, characterized in that: The air-cooled condenser module includes a heat exchanger, a refrigerant inlet is opened at the top of one side wall of the shell, the refrigerant inlet is connected to the inlet end of the top of the heat exchanger through a pipe, a pressure sensor is installed on the pipe, and the outlet end at the bottom of the heat exchanger is connected to the inlet end of the heat exchanger.

6. An evaporative condenser according to claim 5, characterized in that: A refrigerant outlet is provided on one side wall of the shell and below the refrigerant inlet. The refrigerant outlet is connected to an outlet end of the heat exchanger through a pipeline.

7. The evaporative condenser according to claim 5, characterized in that: The heat exchanger is connected by two fins in a "V" shape, the top of the fin is the inlet end, and the bottom is the outlet end.

8. The evaporative condenser according to claim 1, characterized in that: A plurality of air inlets are provided on the side wall of the shell and located on both sides of the air-cooled condenser module and the evaporative condenser module.

9. The evaporative condenser according to claim 1, characterized in that: A humidity sensor is also installed on the top of the shell.

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