JPH0248784Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field to which the invention pertains] This invention is a water-cooled cooling device that circulates and supplies water cooled by a heat exchanger as a refrigerant through a reserve tank to cool an object to a predetermined temperature.
The present invention relates to a reserve tank that suppresses fluctuations in the temperature of cooling water supplied to the object to be cooled.

[Prior art and its problems]

As this type of water-cooled cooling device, one shown in FIG. 3 is known. In FIG. 3, 1 is an object to be cooled, and 2 is a cooling water circulation circuit that uses cooling water as a refrigerant in order to cool the object 1 to be cooled, and is configured as a closed circuit as follows. 3 is a cooling coil that is thermally piped to the object to be cooled 1 and through which cooling water flows; 4 is a cooling water circulation circuit 2 that shows changes in thermal expansion of the cooling water;
5 is a water pump that circulates cooling water in the direction of the arrow; 6 is a water pump 5; one end is open to the atmosphere;
The heat held by the water sent by the pipe 61
The heat exchanger 7, which cools the cooling water by transferring heat to the flowing fluid, is a reserve tank that is the object of this invention and will be described later. Reference numeral 8 denotes a mixing type three-way valve for adjusting the water temperature, which is provided with a branch pipe 81 that branches from the outlet pipe of the water pump and merges with the outlet pipe of the reserve tank 7, and is provided at the junction. Water temperature sensor 82 attached to the inlet side pipe of
By the controller 83 operated by the detection signal of
Control is performed to adjust the mixing ratio between the main cooling water cooled by the heat exchanger 6 and passing through the reserve tank 7 and the tributary cooling water passing through the branch pipe line 81. As shown in FIG. 4, the reserve tank 7 has a cooling water inlet 71 at the bottom of a tank body 71 having a sealed structure.
The large heat capacity of the cooling water stored in the heat exchanger absorbs the fluctuations in the temperature of the cooling water sent from the heat exchanger 6 with fluctuations in water temperature, and directs the cooling water whose water temperature has been leveled to the three-way valve 8. It is designed to be sent out.

In the above cooling system, an appropriate amount of tributary cooling water passing through a branch pipe 81 is mixed into the main cooling water whose temperature has been equalized and sent out from the reserve tank 7 through the three-way valve 8, and the temperature is adjusted to a constant temperature. The cooled water is circulated and supplied to the cooling coil 3. The object to be cooled 1 is cooled to a predetermined temperature via the cooling coil 3.

However, in the conventional reserve tank 7, the inlet 7
The cooling water sent from 2 flows toward the outlet 73 in a short-circuit manner, and the water temperature distribution within the tank body 71 is uneven. For this reason, cooling water whose temperature is not sufficiently leveled is sent out from the outlet 73, resulting in the inconvenience that cooling water with large temperature fluctuations is supplied to the cooling coil 3, or stagnant water is generated in the tank body 71. However, due to long-term retention, slime is generated in the water, which deteriorates the water quality. The deterioration in water quality can be a fatal drawback when the object to be cooled 1 is, for example, an electrical device and pure water with high electrical resistance is used as the cooling water as a refrigerant.

[Purpose of invention]

This idea is to create a reserve tank for a water-cooled cooling system that can reliably absorb temperature fluctuations in the cooling water sent into the tank, circulate and supply cooling water with small temperature fluctuations to the cooling coil, and without the risk of degrading water quality. The purpose is to provide.

[Key points of the idea]

This idea involves installing an inlet pipe protruding from the bottom of the reserve tank with a refrigerant discharge hole opening in the pipe wall.
The cooling water in the reserve tank is stirred by the cooling water sent into the tank from the discharge hole.

[Example of idea]

1 and 2 show an embodiment of this invention, and parts common or identical to those in FIGS. 3 and 4 are designated by the same reference numerals.

In FIGS. 1 and 2, 74 is an inlet pipe that is provided at the bottom of the tank body 71 and protrudes into the tank body 71 of the reserve tank 7. The tank body 71 has a large number of discharge holes 75 that open obliquely downward so as to face substantially the bottom surface of the tank body 71, and serve as a cooling water inlet for the reserve tank 7.

In the above configuration, the cooling water that is cooled by the heat exchanger 6 (FIG. 2) and whose cooling temperature slightly fluctuates is guided to the inlet pipe 74 and sent through the discharge hole 75 into the tank body 71 which is filled with water. The cooling water discharged from the discharge hole 75 rises along the inner surface of the tank as shown by arrow A, and reaches the tank body 71.
Provides a stirring effect to the cooling water inside. Due to this stirring, fluctuations in the temperature of the cooling water sent from the discharge port 75 are rapidly absorbed by the entire cooling water in the tank body 71, and the temperature of the cooling water in the tank body 71 is uniform throughout. be converted into From the outlet 73, the cooling water whose water temperature has been leveled is sent out toward the three-way valve 8 (Fig. 2), and the three-way valve 8 uses the cooling water, which has extremely small fluctuations in water temperature, to send the cooling water to the cooling coil 3 ( The temperature of the cooling water that is circulated and supplied to the pump (FIG. 2) is adjusted to the required temperature and to a stable state with small temperature fluctuations. On the other hand, since the water in the tank body 71 is stirred, no stagnant water is generated in the tank body 71, and the generation of slime is prevented.

[Effect of idea]

According to this invention, the cooling water inlet of the reserve tank is configured by providing an inlet pipe at the bottom of the tank that protrudes into the tank, and also providing a discharge hole in the inlet pipe that opens toward the bottom of the tank. The cooling water inside the reserve tank is stirred by the cooling water sent from the discharge hole, and the water temperature inside the reserve tank is made uniform overall, and the fluctuation in the temperature of the cooling water sent out from the reserve tank is suppressed to a small level. Since there is no stagnant water, no slime is generated. However, this invention is particularly effectively applied to water-cooled cooling devices that use pure water.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a reserve tank showing an embodiment of this invention, Fig. 2 is an enlarged sectional view taken along the - line in Fig. 1, and Fig. 3 is a cooling water circulation circuit diagram of a cooling device to which this invention is applied. , FIG. 4 is a sectional view of a conventional reserve tank. 1... Cooled object, 2... Cooling water circulation circuit, 3...
... Cooling coil, 5 ... Water pump, 6 ... Heat exchanger, 7 ... Reserve tank, 71 ... Tank body, 73 ... Cooling water outlet, 74 ... Inlet pipe, 75 ... Discharge hole.

Claims (1)

[Scope of claim for utility model registration] A water pump that circulates cooling water as a refrigerant,
A heat exchanger for cooling the cooling water, a cooling coil that is heat-conductingly piped to the object to be cooled, and a reserve tank with a sealed structure are connected in series, and the heat exchanger is sandwiched between the heat exchanger and the cooling coil that is heat-transferably piped to the object to be cooled. A water pump is connected to the side, a reserve tank is connected to the downstream side, and a bypass pipe is connected between the outlet side pipe of the reserve tank and the bypass pipe branched from the discharge side of the water pump, and the bypass pipe is connected to the reserve tank. A mixing type three-way valve for adjusting water temperature is connected between the outlet side pipe of the tank and a tributary flow that passes through the bypass pipe to the main cooling water discharged from the reserve tank. In the water-cooled cooling device, the cooling water is mixed into the main stream via a three-way valve, and the cooling water adjusted to a constant temperature is circulated and supplied to the cooling coil to cool the object to be cooled to a predetermined temperature. 1. A reserve tank for a water-cooled cooling device, characterized in that an inlet pipe is provided at the bottom of the tank that projects into the tank, and the inlet pipe is provided with a cooling water discharge port that opens substantially toward the bottom of the tank.