JPS5910656Y2 - water-cooled lighting system - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a lighting system using water-cooled lighting equipment.

In a water-cooled lighting device, the amount of heat that can be removed varies greatly depending on the temperature of the cooling water, and the lower the temperature of the cooling water, the more efficiently lighting heat can be removed.

However, if the cooling water temperature is set too low, condensation will form on the surface of the water-cooled lighting equipment, which will not only adversely affect the electrical performance of the equipment, but also cause stains on the ceiling surface or water droplets to enter the living space. Problems such as falling may occur, which has been a major problem in efficiently removing heat from lighting.

This idea was devised in view of these points, and the cooling water temperature is always set to be slightly higher than the dew point temperature.

Hereinafter, one embodiment of this invention will be described in detail with reference to the drawings.

In the figure, 1 is the ceiling slab of the building, 2 is the ceiling panel,
Reference numeral 3 indicates an attic space formed between the ceiling slab 1 and the ceiling panel 2, and 4 indicates a plurality of water-cooled lighting fixtures, which are connected in series with piping.

5 is an outgoing pipe for sending cooling water to the water-cooled lighting fixture 4;
6 is a return pipe for cooling water coming out of the lighting fixture 4, 7 is a temperature detector installed in the attic space 3, and 8 is a temperature detector 7.
9 is a control device having a storage unit that stores the dew point temperature; 10 is a signal line for sending the signal from the temperature sensor 7 to the control device 9; 11 is a humidity detection device. a signal line for sending signals from the device 8 to the control device 9;
12 is a pump for circulating cooling water; 13 is a three-way valve provided in the discharge side piping 5 of the pump 12;
The flow rate ratio of the cooling water bypassed from the pipe 5 can be adjusted by a signal from the pipe 5.

14 is a signal line for sending a signal from the control device 9 to the three-way valve 13; 15 is a heat exchanger provided in the middle of the outgoing piping 5; and a cooling coil 16 from another cold/heat source device (not shown).
is arranged in a heat exchange relationship with the outgoing pipe 5.

17 is a bypass pipe provided to bypass the heat exchanger 15 by means of a three-way valve 13; 18 is a temperature detector provided in the middle of the outgoing pipe 5 to detect the temperature of the cooling water; 19 is a temperature detector This is a signal line for sending signals from the controller 18 to the control device 9.

Next, the operation of this invention will be described. The temperature and humidity of the attic space 3 detected by the temperature detector 7 and the humidity detector 8 are transmitted to the control device 9 through the signal line 10.11.

The control device 9 determines the dew point temperature from the above two input signals,
This dew point temperature is compared with the cooling water temperature detected by the temperature detector 18 and transmitted through the signal line 19 to the water-cooled lighting fixture 4, and the cooling water temperature is always slightly higher than the dew point temperature. , and generates signals to control the degree of opening and closing of the three-way valve 11.

Thereby, the flow rate ratio of the cooling water flowing into the heat exchanger 15 and the bypass pipe line 17 is adjusted, and the cooling water temperature is maintained above the dew point temperature.

As described above, according to this invention, by always setting the cooling water temperature to be slightly higher than the dew point temperature, it is possible to lower the cooling water temperature to near the dew point temperature, thereby efficiently removing heat from lighting. It is something that can be done.

[Brief explanation of the drawing]

The figure is a schematic sectional view showing an embodiment of the water-cooled lighting device of this invention. In the figure, 4 is a water-cooled lighting fixture, 3 is an attic space, 5, 6 are piping, 7, 18 are temperature detectors, 8 is a humidity detector, 9 is a control device, 10, 11, 14.19 are signals 13 is a three-way valve, 15 is a heat exchanger, 16 is a cooling coil, and 17 is a bypass pipe line.

Claims (1)

[Scope of utility model registration request] A water-cooled lighting fixture having a water channel connected to a piping system that circulates cooling water, a temperature detector and a humidity detector installed in the attic space to detect temperature and humidity, respectively, and a water-cooled lighting fixture installed in the cooling water piping a temperature detector for detecting the cooling water temperature on the inlet side of the type lighting equipment; a control device having a storage unit storing the dew point temperature; and generating a control signal by inputting signals from the three detectors; A heat exchanger provided in the middle of the water piping to cool the cooling water sent to the water-cooled lighting equipment, a bypass pipe provided to bypass the heat exchanger, and a heat exchanger provided in the middle of the cooling water piping, A three-way valve is provided to control the flow rate ratio of the cooling water flowing to the heat exchanger and the bypass pipe in response to a signal from the control device, and the cooling water temperature on the inlet side of the water-cooled lighting equipment is always kept slightly below the dew point temperature. A water-cooled lighting device characterized in that the lighting device is controlled to have a high temperature.