JPH0772630B2 - Water heat exchanger - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a cooling device, a heating device,
The present invention relates to a water heat exchange device used for a hot water supply device or the like.

[0002]

2. Description of the Related Art There is a water heat exchange device for exchanging heat with a low-temperature or high-temperature refrigerant to cool water or to heat water for use in cooling, heating, hot water supply, or the like.

Among these water heat exchange devices, for example, in a cooling device, a high temperature refrigerant discharged from a compressor is condensed by an air heat exchanger and further decompressed by a throttle device so that the temperature becomes low. Water is cooled by exchanging heat between the refrigerant and water with a water heat exchanger. Further, in the heating device and the hot water supply device, the high temperature refrigerant and water discharged from the compressor are heat-exchanged with a water heat exchanger to heat the water.

As described above, the water heat exchange device for exchanging heat between the low-temperature or high-temperature refrigerant and water is generally shown in FIG.
As shown in, the water heat exchanger 2 provided in the refrigerant circuit 1 and the water tank 3 are connected by a circulation pipe 4, and the water in the water tank 3 is pumped between the water tank 3 and the water heat exchanger 2 by a pump 5. The water in the water tank 3 is cooled or heated by circulating the water between them, and the water pipe 3 is connected to the water tank 3, and the water in the water tank 3 is fed from the water pipe 6 to the user side by the pump 7. Has been taken.

[0005]

According to the above-mentioned water heat exchange device, the water heat exchanger 2 provided in the refrigerant circuit 1 and the water tank 3 for containing the water exchanged in the water heat exchanger 2 are provided. Since it is constructed separately and requires two pumps,
It requires a lot of installation area, and on-site construction is a troublesome work. Moreover, since two pumps are driven, power consumption is high.

In view of the above points, the present invention uses a double pipe for the water heat exchanger so that the water heat exchanger and the water tank, which are conventionally separately configured, are not separated from each other without lowering the heat exchange efficiency. The heat exchange device aims at reducing the installation area, simplifying the on-site construction, and further reducing the number of pumps to save electric power.

[0007]

In order to achieve the above-mentioned object, the present invention comprises an inner pipe through which a refrigerant flows and an outer pipe fitted around the outer periphery of the inner pipe with a predetermined space therebetween. A water heat exchanger having a water channel formed between the outer tube and the outer tube is disposed in the water tank, and an opening communicating between the water channel and the water tank is formed at one end of the outer tube and the other end of the outer tube is formed. A conduit was connected to the side to take out the heat-exchanged water in the water channel, and the conduit was connected to a water pipe for sending the heat-exchanged water to the user side via a pump.

[0008]

According to the present invention, an inner pipe through which a refrigerant flows and an outer pipe fitted to the outer periphery of the inner pipe with a predetermined gap therebetween are provided, and a water channel is formed between the inner pipe and the outer pipe. A water heat exchanger is arranged in the water tank, an opening is formed at one end side of the outer pipe to connect the water passage and the inside of the water tank, and water exchanged in the water passage is formed at the other end side of the outer pipe. The pipe for taking out the water was connected to the pipe, and the pipe was connected to the water pipe for sending the heat-exchanged water to the user side through the pump.Therefore, by driving the pump, the water in the water tank is the channel of the heat exchanger. And is heat-exchanged with the refrigerant flowing in the inner pipe in the water passage, and the heat-exchanged water is guided to the conduit by the pump and is sent from the water pipe to the user side.

Since the water heat exchanger is arranged in the water tank, the installation area is smaller than that in the case where the water tank and the water heat exchanger are separately configured, and the on-site construction is simplified. Can be achieved.

Further, since one pump pumps the water to the water heat exchanger in the water tank and the water that has undergone heat exchange in the water heat exchanger to the user side, the installation area can be reduced and the on-site area can be reduced. It contributes to the simplification of construction and saves electricity.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings.

FIG. 1 shows an example in which the present invention is applied to a water heat exchange device in a cooling device.

In the figure, 8 is a compressor, 9 is an air heat exchanger that serves as a condenser, 10 is a throttling device, and 11 is a water heat exchanger, and these are connected by piping to form a refrigerant circuit 12. ing.

The water heat exchanger 11 is arranged in a water tank 13 at a position where it is submerged in water. The water heat exchanger 11 has a coil-shaped two-tube structure including an inner pipe 14 made of a copper pipe through which a refrigerant flows, and an outer pipe 15 made of synthetic resin fitted around the inner pipe 14 with a predetermined gap. It is composed of a heavy pipe, and a water channel 16 is formed between the inner pipe 14 and the outer pipe 15.

An opening 17 communicating with the inside of the water tank 13 is formed at one end of the outer pipe 15 of the water heat exchanger 11 having the above-mentioned structure, and the water in the water tank 13 is passed through the opening 17 to the water channel 1.
The water flowing in the water passage 16 and the refrigerant flowing in the inner pipe 14 are heat-exchanged with each other. Further, a conduit 18 for taking out the heat-exchanged water in the water passage 16 to the outside of the water tank 13 is connected to the other end of the outer pipe 15. And
The positions of the opening 11 formed on one end side of the outer pipe 15 and the conduit 18 connected to the other end side are set so that the water flowing in the water channel 16 and the refrigerant flowing in the inner pipe 14 are in counterflow. There is. A pump 19 that sucks the water in the water tank 13 into the water passage 16 of the water heat exchanger 11 and guides the heat-exchanged water in the water passage 16 to the conduit 18 and sends the water to the user side.
Is provided. Reference numeral 20 is a water supply pipe for sending the water guided to the conduit 18 to the user side, and one end of the water supply pipe 20 is the conduit 1
8 and the other end is connected to the water tank 13,
The water sent to the user side is returned to the water tank 13.

Further, a bypass pipe 21 is connected between the water supply pipe 20 and the water tank 13 to return the water sent from the conduit 18 to the water supply pipe 20 to the water tank 13 by bypassing the use side. Reference numeral 22 is a valve provided on the bypass pipe 21, and 23 is a valve provided on the water supply pipe 20. Two
Reference numeral 4 is a makeup water inlet for replenishing water in the water tank 13, 25 is a spare outlet for taking out water from the water tank 13, and 26 is a drain.

According to the above-described embodiment, the high temperature refrigerant discharged from the compressor 8 is condensed in the air heat exchanger 9 and further decompressed by the expansion device 10 to become a low temperature refrigerant, which is the water heat exchanger 11.
Flows to. On the other hand, the water in the water tank 13 is driven by the pump 19 to form the inner pipe 14 and the outer pipe 15 through which the low-temperature refrigerant flows from the opening 17 formed at one end of the outer pipe 15 of the water heat exchanger 11. Is sucked into the water channel 16 formed by the gap and flows in the water channel 16 in the direction opposite to the flowing direction of the refrigerant. In this way, the water flowing in the water passage 16 is cooled by exchanging heat with the low-temperature refrigerant flowing in the inner pipe 14 in the water passage 16, is guided to the conduit 18, and is sent to the utilization side by the water supply pipe 20.

In the heat exchange by the water heat exchanger 11, the water heat exchanger 11 has a double pipe structure of the inner pipe 14 and the outer pipe 15, and the space between the inner pipe 14 and the outer pipe 15 is increased. Since it is designed to exchange heat with the water passing through the water passage 16 provided in the water tank, the water is submerged in the water tank 13, but the heat exchange efficiency is good and sufficiently heat-exchanged water can be obtained.

The flow velocity of the water flowing in the water passage 16 of the water heat exchanger 11 can be adjusted by opening and closing the valve 22 of the bypass pipe 21, and when the cooling water amount on the load side is small, By opening the valve 22, it is possible to adjust the flow rate to be efficient.

The above embodiment shows an example in which the present invention is applied to a water heat exchange device in a cooling device, but the same applies to the case where the present invention is applied to a water heat exchange device for a heating device or a hot water supply device.

[0021]

As described above, according to the present invention, the water heat exchanger has sufficient heat exchange efficiency and the water heat exchanger is arranged in the water tank. It is possible to reduce the installation area compared to the conventional water heat exchange device in which and are separately configured, and it is possible to simplify the on-site construction. Furthermore, since it is possible to circulate water with one pump, it contributes to the reduction of the installation area and simplification of on-site construction as compared to the conventional water heat exchanger that requires multiple pumps. It is possible to save power.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an example of a conventional water heat exchange device.

[Explanation of symbols]

 11 Water Heat Exchanger 13 Water Tank 14 Inner Tube 15 Outer Tube 16 Water Channel 17 Opening 18 Conduit 19 Pump 20 Water Pipe

Claims (1)

[Claims] 1. A water heat exchanger comprising an inner pipe through which a refrigerant flows and an outer pipe fitted to the outer periphery of the inner pipe at a predetermined interval, wherein a water channel is formed between the inner pipe and the outer pipe. The water pipe is arranged in the water tank, and an opening is formed on one end side of the outer pipe to connect the water passage and the water tank, and a conduit for taking out the heat-exchanged water in the water pipe is formed on the other end side of the outer pipe. The water heat exchange device is characterized in that a water supply pipe is connected to the pipe, and a water supply pipe for sending heat-exchanged water to a user side via a pump is connected to the pipe.