KR200197066Y1 - Heat-pump type device for collecting waste heat - Google Patents

Abstract

A heat pump type waste heat recovery apparatus for preheating newly introduced groundwater using the heat of wastewater discharged from the bathhouse and receiving and lowering the temperature of the cold bath to further reduce the temperature is provided. The present invention is a first heat exchanger for heat exchange with the heat medium circulated by receiving the high temperature wastewater from the waste hot water discharge pump; A compression unit connected to an outlet side of the first heat exchanger through a first filter and a pressure regulating valve to compress the heat medium to high temperature and high pressure; A second heat exchanger connected to the outlet side of the compression unit and configured to perform second heat exchange with the ground water introduced through the high temperature and high pressure heat medium and the ground water inflow pump; A third heat exchanger connected to an outlet side of the second heat exchanger and configured to primarily heat exchange with groundwater introduced through the groundwater inflow pump; A liquid storage tank connected to an outlet side of the third heat exchanger to store a heat medium changed into a liquid state; An expansion valve connected to the outlet side of the liquid storage tank and configured to receive the liquid medium in the liquid state through the second filter and expand the liquid medium; And a fourth heat exchanger connected to the outlet side of the expansion valve to heat-exchange the heat medium passing through the expansion valve and the cold water introduced from the cold water inflow pump to the first heat exchanger. Heat pump type waste heat recovery apparatus according to the present invention is efficient in the waste water facility of the bathroom by receiving the waste hot water from the hot water in the bathroom to preheat the ground water and cooling the cold water from the cold water.

Description

Heat-pump type device for collecting waste heat

The present invention relates to a heat pump type waste heat recovery device, and in particular, preheats newly introduced ground water using heat of waste hot water discharged from the bath, and supplies energy by lowering the temperature by receiving cold water. It relates to a heat pump waste heat recovery device for reducing.

In general, in the bathroom, waste water of 30-40 ℃ is discharged as it is, and consumes enormous thermal energy.In addition, when the waste water of high temperature is left as it is, it is impossible to multiply the microorganisms to purify the water, thereby increasing the treatment cost. It becomes a factor.

In order to prevent the problems caused by the increase in the treatment cost, a device for heat-exchanging high-temperature waste hot water and a heat medium, and compressing the heat-exchanged heat medium to heat-exchange with groundwater, has been applied to the Korean Utility Model Application No. 2000-8228 by the same applicants. Is disclosed.

Republic of Korea Utility Model Application No. 2000-8228 is a heat medium that heat exchanged with the heat medium circulated by receiving the high temperature wastewater from the waste hot water discharge pump in the first heat exchanger, and passed through the first filter and pressure control valve in the first heat exchanger Is compressed to high temperature and high pressure in the compression section. The high temperature and high pressure heat medium passing through the compression part is secondarily heat exchanged with the groundwater introduced through the groundwater inflow pump in the second heat exchanger, and is introduced through the groundwater inflow pump in the third heat exchanger connected to the outlet side of the second heat exchanger. The first heat exchange with the groundwater changes to a liquid state where the temperature is lowered. The heat medium changed in this state is stored in the liquid storage tank, and the heat medium stored in the liquid storage tank is expanded in the expansion valve through the second filter and flows back into the first heat exchanger. Therefore, the heat exchange efficiency of the waste hot water flowing out of the bath or factory is increased.

The present invention is to add a fourth heat exchanger for heat exchange with the cold water introduced through the pump in the heating medium and the bathroom heat exchanged and cooled in the second heat exchanger and the third heat exchanger in the Korean Utility Model Application No. 2000-8228, It is an object of the present invention to provide a heat pump type waste heat recovery device suitable for a bathroom facility by supplying the cold water by cooling the water of the cold water as well as the heat recovery of the waste hot water flowing out of the hot water of the bathroom.

1 is a system diagram for showing a heat pump waste heat recovery device according to the present invention.

<Description of the code | symbol about the principal part of drawing>

110: waste hot water discharge pump 112: first heat exchanger

114,115 Filter 116 Pressure regulating valve

120: compression unit 122: compressor

124: oil separation unit 130: groundwater inflow pump

140: second heat exchanger 150: third heat exchanger

152: fourth heat exchanger 154: cold water inlet pump

160: liquid storage tank 170: expansion valve

The present invention for achieving the above object,

A first heat exchanger for heat-exchanging heat medium circulated by receiving high-temperature wastewater from the waste hot water discharge pump;

A compression unit connected to an outlet side of the first heat exchanger through a first filter and a pressure regulating valve to compress the heat medium to high temperature and high pressure;

A second heat exchanger connected to the outlet side of the compression unit and configured to perform second heat exchange with the ground water introduced through the high temperature and high pressure heat medium and the ground water inflow pump;

A third heat exchanger connected to an outlet side of the second heat exchanger and configured to primarily heat exchange with groundwater introduced through the groundwater inflow pump;

A liquid storage tank connected to an outlet side of the third heat exchanger to store a heat medium changed into a liquid state;

An expansion valve connected to the outlet side of the liquid storage tank and configured to receive the liquid medium in the liquid state through the second filter and expand the liquid medium; And,

And a fourth heat exchanger connected to the outlet side of the expansion valve to heat-exchange the heat medium passing through the expansion valve and the cold water introduced from the cold water inflow pump, and then introduce the same into the first heat exchanger.

Heat pump type waste heat recovery apparatus according to the present invention is efficient in the waste water facility of the bathroom by receiving the waste hot water from the hot water in the bathroom to preheat the ground water and cooling the cold water from the cold water.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a system diagram for showing a heat pump waste heat recovery device according to the present invention.

Waste heat recovery device according to the present invention, as shown in Figure 1, the first heat exchanger (112) for heat exchange with the heat medium circulated by receiving the hot waste water discharged from the bath or factory, such as waste hot water discharge pump 110 A compression unit 120 for compressing the heat medium circulated through the first filter 114 and the pressure regulating valve 116 to a high temperature and high pressure is connected to the outlet side of the compressor 120. Compressor 120 is composed of a compressor 122 for compressing the heat medium to high temperature and high pressure, and an oil separation device 124 for separating oil and heat medium generated in the compressor 122.

The second heat exchanger 140 and the third heat exchanger 150 for exchanging heat with the high temperature and high pressure heat medium generated from the compression unit 120 and the ground water introduced through the groundwater inflow pump 130 are provided at the outlet side of the compression unit 120. ) Are each connected. The outlet side of the third heat exchanger 150 is connected to a liquid storage tank 160 for storing heat medium changed into a liquid state by heat exchange with groundwater. The outlet side of the liquid storage tank 160 flows into the fourth heat exchanger 152 through an expansion valve 170 which expands the heat medium in the liquid state through the second filter 115 and converts it into a two-phase state of liquid and gaseous phase. do. The fourth heat exchanger 152 receives the water of the cold bath of the bathroom from the cold water inflow pump 154 and heat-exchanges with the low temperature low pressure heat medium passing through the expansion valve 170 to cool the water of the cold bath and supply it to the cold bath. The heat medium exchanged with the water of the cold water through the fourth heat exchanger 152 flows into the first heat exchanger 112.

Here, the first to fourth heat exchangers (112, 140, 150, 152) is composed of a plate heat exchanger so that the heat exchange operation between the flow path through which the water moves and the flow path through which the heat medium moves. In addition, valves V1-V3 are installed in flow paths through which water moves to the pumps 110, 130, 152 and the outlet side of the first heat exchanger 112.

The heat pump waste heat recovery apparatus according to the present invention configured as described above receives high temperature wastewater of about 30-35 ° C. from the waste hot water discharge pump 110 and heat-exchanges with the heat medium circulated by introducing it into the first heat exchanger 112. . The heat medium is exchanged with the high temperature wastewater and then changed to a high temperature low pressure state and flows into the compression part via the first filter 114 and the pressure regulating valve 116. The heat medium discharged from the first heat exchanger 112 is filtered by the first filter 114 and maintained at a constant pressure through the pressure regulating valve 116 to be introduced into the compression unit 120.

Compressor 120 compresses the heat medium of high temperature and low pressure to high temperature and high pressure in compressor 122, and separates oil and heat medium generated in compressor 122 through oil separator 124 and then heat exchanger 140. ) And the third heat exchanger 150. In the second heat exchanger 140 and the third heat exchanger 150, heat exchange with groundwater introduced through the high temperature and high pressure heat medium and groundwater inflow pump 130 generated in the compression unit 120 is performed. That is, the heat medium of the high temperature and high pressure generated in the compression unit 120 is introduced into the third heat exchanger 150 through the second heat exchanger 140. At this time, the groundwater introduced through the groundwater inflow pump 130 is The first heat exchanger with the heat medium through the third heat exchanger 150, and flows into the second heat exchanger 140 to the secondary heat exchange with the heat medium.

In the second heat exchanger 140 and the third heat exchanger 150, the heat medium changed into the liquid state by heat exchange with the ground water is stored in the liquid storage tank 160. The heat medium stored in the liquid storage tank 160 is filtered by the second filter 115, and then expands the heat medium in the liquid state through the expansion valve 170 to convert into a two-phase state of the liquid phase and the gas phase, and then the fourth heat exchanger 152. Inflow). The fourth heat exchanger 152 receives the water of the cold bath of the bathroom from the cold water inflow pump 154 and heat-exchanges with the low temperature low pressure heat medium passing through the expansion valve 170 to cool the water of the cold bath and supply it to the cold bath. The heat medium exchanged with the water of the cold water through the fourth heat exchanger 152 flows into the first heat exchanger 112. The first heat exchanger 112 exchanges heat with the hot wastewater and the heat medium introduced from the waste hot water discharge pump 110. Therefore, the ground water is heated to 50 ° C. by using the heat of waste hot water.

As described above, in the bath according to the present invention, the waste water is introduced from the hot water to preheat the ground water, and the cold water is introduced from the cold water to cool the water to increase the heat exchange efficiency, and is efficient for the waste water facility of the bath.

Although the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited thereto and may be improved or modified by those skilled in the art within the scope of the technical idea of the present invention.

Claims (3)

A first heat exchanger (112) for heat-exchanging with a heat medium circulated by receiving high-temperature wastewater from the waste hot water discharge pump (110); A compression unit 120 connected to the outlet side of the first heat exchanger 112 through a first filter 114 and a pressure regulating valve 116 to compress the heat medium to high temperature and high pressure; A second heat exchanger (140) connected to the outlet side of the compression unit (120) for second heat exchange with the thermal medium having a high temperature and high pressure and the groundwater introduced through the groundwater inflow pump (130); A third heat exchanger (150) connected to an outlet side of the second heat exchanger (140) for first heat exchange with groundwater introduced through the groundwater inflow pump (130); A liquid storage tank 160 connected to an outlet side of the third heat exchanger 150 to store a heat medium changed into a liquid state; An expansion valve (170) connected to an outlet side of the liquid storage tank (160) to receive and expand a liquid heat medium in a liquid state through a second filter (115); And, It is connected to the outlet side of the expansion valve 170 and the heat medium passing through the expansion valve 170 and the cold water introduced from the cold water inlet pump 154 for heat exchange to the first heat exchanger 112 Heat pump type waste heat recovery device comprising a heat exchanger (152). The heat pump waste heat recovery apparatus according to claim 1, wherein the first to fourth heat exchangers (112, 140, 150, 152) are constituted by a plate heat exchanger. The method of claim 1, wherein the compression unit 120 is composed of a compressor 122 for compressing the heat medium to high temperature and high pressure and an oil separation device 124 for separating oil and heat medium generated in the compressor 122. Heat pump type waste heat recovery device.