JPH06229644A - Ammonia-absorption type chiller - Google Patents

Abstract

PURPOSE:To provide an ammonia-absorption type chiller which can remove ammonia odor and secure safety without separately providing a harm-removing device against leakage of ammonia as refrigerant. CONSTITUTION:In a chiller 1 using ammonia as refrigerant a branch pipe 14 is provided on the outlet side of a cooled-water pump 9, equipped with a control valve 13, and connected to a water-sprinkling nozzle 15. In case of leakage of ammonia the control valve 13 is operated to make cooled water absorb ammonia.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption chiller using ammonia as a refrigerant.

[0002]

2. Description of the Related Art In conventional ammonia absorption chillers, the ammonia used as a refrigerant is a toxic and flammable gas, so that the refrigerating capacity of 3 tons or more is legally regulated and harmless. Measures are required.

As a conventional detoxification measure, a water sprinkling facility including a water storage tank, a pump, a water sprinkling nozzle and the like has been installed in the vicinity of an ammonia absorption chiller.

However, if the detoxification equipment is provided separately from the ammonia absorption chiller, the equipment cost of the chiller system as a whole increases.

Further, since it is necessary to separately install a sprinkling facility such as a water storage tank, the space of a building or factory is used up, which is disadvantageous for effective use of space.

[0006]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an ammonia absorption chiller capable of removing ammonia odor and ensuring safety without separately providing a detoxifying device for ammonia leakage of the refrigerant. .

[0007]

The ammonia absorption chiller according to the present invention will be described below with reference to the accompanying drawings. The ammonia absorption chiller according to the present invention is provided with a chilled water branch pipe near the outlet of a chilled water pump 9 of a chilled water supply pipe 11. A pipe 14 is provided, and the branch pipe 14 is connected to the control valve 13
The watering nozzle 15 is connected via. The positional relationship of the water spray nozzle 15 is the upper space in the chiller body.

[0008]

In this ammonia absorption chiller, the aqueous ammonia solution in the generator 2 is heated by the burner 6,
High-pressure ammonia vapor is introduced to the condenser 3. The ammonia reliquefied by the air-cooling fan 7 is decompressed by the orifice type expansion valve 16 and vaporized by the evaporator 4.

Further, the ammonia dissolves in water in the absorber 5 to become an aqueous ammonia solution, which is returned to the generator 2 by the aqueous solution pump 8. When the ammonia gas leaks from a part of the circuit through which the ammonia circulates, the control valve 13 is immediately opened. The cold water pressurized and supplied by the cold water pump 9 is sprayed through the cold water branch pipe 14 from the spray nozzle 15 to the space where the ammonia gas exists, and absorbs the leaked ammonia gas.

[0010]

In the embodiment shown in FIG. 1, the control valve 13 is a manual valve, but the control valve 3 can be remotely operated as an electromagnetic valve. Further, as shown in FIG. 2, it can be linked with the gas leak alarm 18.

In this case, the leak gas from the gas sampling tube 19 enters the gas overflow alarm device 18, and the gas overflow alarm device 18 sends a detection signal to the control panel 20 and at the same time, the sound or the lamp blinks. Report a gas leak. The control board 20 sends an operation signal to the control valve 13 having a solenoid valve structure.

Each of the embodiments shown in FIGS. 1 and 2 has a condenser 3
While the air-cooling fan 7 is used for cooling in the absorber 5 and the absorber 5, in the embodiment shown in FIG. 3, cooling water is used. In this embodiment, the cooling water is supplied to the cooling water supply pipe 21.
It branches further, is guided to the cooling water branch pipe 23 through the control valve 13, and is sprayed from the spray nozzle 15. This control valve 13 can also be an electromagnetic valve configuration and can be remotely operated by a suitable sensor and control panel.

[0013]

As described above, in the ammonia absorption chiller of the present invention, when the ammonia gas leaks, the control valve 1
3 is opened and cold water circulating in the chiller itself is sprinkled on the ammonia gas. The lower the temperature of the water is, the larger the amount of ammonia penetrates into the chiller. Can be absorbed into.

Further, in the ammonia absorption chiller of the present invention, since the cold water of the chiller itself is used as the cold water for absorbing the ammonia gas, it is not necessary to separately provide a detoxifying device such as a large-scale water storage tank. And the installation space can be significantly reduced.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an overall configuration of an ammonia absorption chiller according to an embodiment of the present invention.

FIG. 2 is a schematic diagram when a gas leak alarm is incorporated in the ammonia absorption chiller shown in FIG.

FIG. 3 is a schematic diagram of an ammonia absorption chiller according to another embodiment of the present invention.

[Explanation of symbols]

 1 Chiller main body 2 Generator 3 Condenser 4 Evaporator 5 Absorber 6 Burner 7 Air cooling fan 8 Solution pump 9 Cold water pump 10 Cold water tank 11 Cold water supply pipe 12 Cold water return pipe 13 Control valve 14 Cold water branch pipe 15 Water spray nozzle 16 Expansion Valve 17 Electromagnetic Valve 18 Gas Leak Alarm Device 19 Gas Sampling Tube 20 Control Panel 21 Cooling Water Supply Pipe 22 Cooling Water Return Pipe 23 Cooling Water Branch Pipe

Claims (1)

[Claims] 1. In a chiller using ammonia as a refrigerant, a branch pipe is provided on the outlet side of a cold water pump, connected to a water spray nozzle via a control valve, and when the ammonia leaks, the control valve is operated to remove the ammonia. An ammonia absorption chiller characterized by absorbing it in cold water.