KR20230016466A - Heat supply apparatus - Google Patents

Abstract

The present invention relates to a heat supply apparatus. The heat supply apparatus of the present invention comprises: an outdoor unit which includes a heat exchanger for exchanging heat between refrigerant and water; a load unit which uses the heat of the heat-exchanged water as a load; and an indoor unit which supplies the water flowing from the outdoor unit to the load unit, and supplies the water flowing from the load unit to the outdoor unit, wherein the indoor unit comprises: a case which forms the external appearance; a first connection pipe which is provided inside the case and sends the water introduced from the outdoor unit to the load unit; a second connection pipe which is provided inside the case and sends the water introduced from the load unit to the outdoor unit; and a pump which is provided on the second connection pipe and pumps the water from the load unit to the outdoor unit. Therefore, the heat supply apparatus can prevent foreign substances from entering into the pump, thereby extending the lifespan of the pump.

Description

Heat supply device {HEAT SUPPLY APPARATUS}

The present invention relates to a heat supply device, and more particularly to a heat supply device for supplying water that has undergone heat exchange with a refrigerant flowing through a heat pump to a load portion of an indoor space.

Referring to FIG. 1 , a heating system including a gas boiler supplies a heat source heated by the gas boiler 1 to a load unit 2 such as a floor heating or hot water tank through a pipe. Pipes connecting the gas boiler and the load unit may be disposed in a buried state in a building.

However, in countries such as Europe, there is a tendency to replace gas boilers with water-refrigerant heat supply devices in order to reduce carbon emissions and minimize the use of refrigerants.

KR 10-2012-0062153 A discloses content in which water and refrigerant are heat-exchanged and the heat-exchanged water is supplied to a load unit, but since the refrigerant is supplied to the indoor unit, there is a problem in that the amount of refrigerant is used at a certain level or more. . This has a problem that is difficult to use in countries such as Europe where the amount of refrigerant is limited.

Referring to FIG. 2 , in the heat supply device using water-refrigerant, water heat-exchanged in the outdoor unit 20 may be supplied to the load unit 30 through the indoor unit 10 replacing the boiler. However, the heat supply device using water-refrigerant has a structure in which water discharged from the load unit 30 is directly supplied to the outdoor unit 20 . In this structure, since a separate pipe connecting the load unit and the outdoor unit must be newly installed, there is a problem in that a lot of cost and time may be required to bury the new pipe in the building.

In addition, in the above structure, since the pump disposed in the indoor unit is disposed at a portion where water discharged from the outdoor unit is supplied to the load unit, heated water is supplied by the pump, thereby shortening the lifespan of the pump.

The problem to be solved by the present invention is to provide a heat supply device that can replace a heat supply device using water-refrigerant while maintaining the piping of an existing boiler system.

Another object of the present invention is to provide a heat supply device capable of securing the expiration date of a pump that circulates water pipes.

Another object of the present invention is to provide a heat supply device that increases heat transfer efficiency to a load part.

The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, a heat supply device according to an embodiment of the present invention includes an outdoor unit including a heat exchanger for exchanging heat between a refrigerant and water, a load unit using heat of the heat-exchanged water as a load, and water flowing from the outdoor unit. and an indoor unit for supplying water to the load unit and supplying water flowing in the load unit to the outdoor unit, wherein the indoor unit includes a case forming an external shape, disposed inside the case, and water flowing in from the outdoor unit. A first connection pipe that sends water to the load unit, a second connection pipe that is disposed inside the case and sends water flowing in from the load unit to the outdoor unit, and is disposed in the second connection pipe to direct water from the load unit to the outdoor unit. Including a pump that pumps to the outdoor unit, water discharged from the outdoor unit may be transferred to a load unit through the indoor unit, and water discharged from the load unit may be transferred to the outdoor unit through the indoor unit. In addition, the pump supplies water delivered from the load unit to the outdoor unit so that the water can be circulated as a whole.

The first connection pipe includes a 1-1 connection pipe extending from the lower plate of the case and forming a flow path through which water flows upward, and the 1-1 connection pipe at a position spaced downward from the upper end of the 1-1 connection pipe. It includes a 1-2 connection pipe connected to the circumferential surface of the 1 connection pipe, and an air band discharging steam formed from flowing water is disposed at the top of the 1-1 connection pipe, so that heated water supplied from the outdoor unit is provided. The steam generated from the can be discharged.

The length at which the 1-1 connection pipe extends upward from the lower plate is longer than the height at which the second connection pipe protrudes upward from the lower plate, so that the water supplied from the outdoor unit through the 1-1 connection pipe The generated vapor can be collected as much as possible and sent to the airband.

The 1-1 connection pipe connects a lower pipe connected to the first connector, an upper pipe disposed above the lower pipe and having the air band disposed thereon, and connecting the first pipe and the second pipe. It includes a middle pipe, and the middle pipe is formed of a material different from that of the lower pipe and the upper pipe, so that the length of the 1-1 connection pipe can be secured with a plurality of pipes.

The middle pipe is formed of a material having a higher melting point than the lower pipe and the upper pipe, and the middle pipe may be coupled to each of the lower pipe and the upper pipe by welding or the like.

The 1-2 connection pipe includes a horizontal pipe connected to the 1-1 connection pipe and a vertical pipe extending from an end of the horizontal pipe in a downward direction where the lower plate is disposed, and the vertical pipe includes the vertical pipe. A heater for heating water flowing through the pipe may be disposed to additionally heat water supplied to the load unit.

The second connection pipe includes a pump inlet pipe disposed on an upstream side of the pump and a pump outlet pipe disposed on a downstream side of the pump, and in the pump inlet pipe, water flowing in from the load unit is present. A strainer for filtering out foreign substances may be disposed to filter out foreign substances included in the water supplied from the load unit.

The pump inlet pipe has a bent shape upstream where the strainer is disposed.

The pump inlet pipe includes a first pump inlet pipe extending upward from the lower plate and including a bending portion changing in the flow direction, and a second pump inlet pipe connecting one side of the first pump inlet pipe and the pump Including, the strainer is disposed at the end of the first pump inlet pipe, it is possible to easily collect foreign substances.

The second pump inlet pipe is arranged to be connected to the circumference of the first pump inlet pipe at a position spaced upward from the end of the first pump inlet pipe, so that foreign substances can be prevented from flowing into the pump.

The first pump inlet pipe includes a rising passage forming pipe extending upward from the lower plate and forming a rising passage, a bending portion connected to the rising passage forming pipe and changing the flow direction, and a bending portion connected to the bending portion and descending It includes a downflow passage forming pipe forming a flow path, and the strainer is disposed at a lower end of the downflow passage forming pipe to prevent foreign substances from flowing into the pump.

The length of the first connection pipe is longer than that of the second connection pipe, so that steam generated from heated water supplied from the outdoor unit can be collected and discharged to the outside. That is, it is possible to minimize the supply of steam to the load part.

The case includes a lower plate covering a lower portion, and a plurality of connectors are disposed on the lower plate to connect the first connection pipe or the second connection pipe and a pipe connected to the outdoor unit or the load unit. , It is possible to easily connect the pipe connected from the outdoor unit and the load unit to the connection pipe disposed inside the indoor unit.

The plurality of connectors include a first connector to which the upstream end of the first connection pipe is connected, a second connector to which the downstream end of the first connection pipe is connected, and a third connector to which the upstream end of the second connection pipe is connected. , And a fourth connector to which the downstream end of the second connection pipe is connected, and the distance between the third connector and the fourth connector disposed on the lower plate is the first connector disposed on the lower plate. Since the connector and the second connector are formed shorter than the spaced apart, the length of the first connection pipe can be secured longer than the length of the second connection pipe.

Details of other embodiments are included in the detailed description and drawings.

According to the heat supply device of the present invention, one or more of the following effects are provided.

First, as the water discharged from the outdoor unit is delivered to the load unit through the indoor unit, and the water discharged from the load unit is delivered to the outdoor unit through the indoor unit, the boiler's heat supply device uses a heat pump to supply water without installing a separate indoor pipe. There is an advantage in that it can be easily replaced with a heat supply device including an indoor unit and an outdoor unit for heating.

Second, the pump pumps the water discharged from the load unit to the outdoor unit so that the temperature of the water supplied to the pump is formed below a set value, thereby prolonging the life of the pump. In addition, it is possible to prevent foreign matter from being introduced into the pump through the structure of the second connection pipe, so that the service life of the pump can be extended.

Third, steam generated from heated water supplied from the outdoor unit can be removed from the inside of the indoor unit, thereby minimizing the flow of steam to the load unit. This has an advantage in that the water from which steam has been removed is supplied to the load unit to increase the thermal efficiency of the water delivered to the load unit.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a schematic diagram of a device for supplying heat to a load unit with a boiler according to the prior art.
2 is a schematic diagram of a device for supplying heat to a load unit through an indoor unit and an outdoor unit.
3 is a schematic diagram of a heat supply device according to an embodiment of the present invention.
4 is a system diagram of a specific configuration of an outdoor unit and an indoor unit of a heat supply device according to an embodiment of the present invention.
5 is a perspective view of an indoor unit of a heat supply device according to an embodiment of the present invention.
6 is a view for explaining a water pipe disposed inside an indoor unit according to an embodiment of the present invention.

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs. It is provided to completely inform the person who has the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

The upper (U), lower (D), left (Le), right (Ri), front (F), and rear (R) marks in FIGS. 5 and 6 are for explaining the configuration of the heat supply device. Accordingly, when the criterion is different, the corresponding direction display may also be differently described.

Hereinafter, the present invention will be described with reference to drawings for explaining a heat supply device according to embodiments of the present invention.

Referring to FIG. 3 , the heat supply device of the present invention includes an outdoor unit 200 including a heat exchanger (not shown) for exchanging heat between refrigerant discharged from a compressor (not shown) and water, and a heat source of water heat exchanged in the outdoor unit 200 The indoor unit 100 includes a load unit 300 using a pump disposed between the outdoor unit 200 and the load unit 300 and circulating water flowing through the outdoor unit 200 and the load unit 300. include

Referring to FIG. 3 , the heat supply device includes a first pipe 50 connecting the outdoor unit 200 and the indoor unit 100 and a second pipe 60 connecting the indoor unit 100 and the load unit 300. do. The first pipe 50 includes a first supply pipe 52 through which water is supplied to the indoor unit 100 and a first discharge pipe 54 through which water is discharged from the indoor unit 100 . The second pipe 60 includes a second supply pipe 62 through which water is supplied to the indoor unit 100 and a second discharge pipe 64 through which water is discharged from the indoor unit 100 .

Referring to FIG. 4 , the outdoor unit 200 includes a compressor 210 that compresses the refrigerant, a first heat exchanger 220 that exchanges heat between the refrigerant flowing from the compressor 210 and water, and the refrigerant flowing from the compressor 210. In the second heat exchanger 230 that exchanges heat with air, the expansion valve 240 disposed between the first heat exchanger 220 and the second heat exchanger 230 and expanding the flowing refrigerant, and the compressor 210 A switching valve 250 for sending the discharged refrigerant to the first heat exchanger 220 or the second heat exchanger 230 is included.

The outdoor unit 200 of the present invention includes both the first heat exchanger 220 and the second heat exchanger 230 therein, so that the amount of refrigerant used can be minimized. In addition, since water flows into the indoor space, an accident in which the refrigerant leaks into the indoor space can be prevented.

The first heat exchanger 220 may heat-exchange the compressed refrigerant flowing from the compressor 210 with water. That is, the refrigerant may transfer heat generated while being compressed by the compressor to water through the first heat exchanger 220 . The first heat exchanger 220 may use a plate heat exchanger that exchanges heat between water and a refrigerant.

Referring to FIG. 4 , the indoor unit 100 is connected to the outdoor unit 200 through the first pipe 50. The indoor unit 100 may transfer water discharged from the outdoor unit 200 to the load unit 300 .

The indoor unit 100 includes a first connection pipe 110 connecting the first supply pipe 52 and the second discharge pipe 64 and connecting the second supply pipe 62 and the first discharge pipe 54. A second connection pipe 130 is included. A pump 150 is disposed in the second connection pipe 130 to form a flow of water in the entire pipe. An auxiliary heater 160 for heating water supplied to the load unit 300 is disposed in the first connection pipe 110 .

Hereinafter, a specific configuration of the indoor unit 100 will be described with reference to FIGS. 5 and 6 .

Referring to FIGS. 5 and 6 , the indoor unit 100 includes a case 102 forming an external shape, and a first unit disposed inside the case 102 and sending water flowing in from the outdoor unit 200 to the load unit 300. The connection pipe 110, the second connection pipe 130 disposed inside the case 102 and sending water flowing in from the load unit 300 to the outdoor unit 200, and the second connection pipe 130 disposed in the load A pump 150 for supplying water from the unit 300 to the outdoor unit 200 is included.

The pump 150 is disposed on the second connection pipe 130. The temperature of the water flowing through the second connection pipe 130 is lower than the temperature of the water flowing through the first connection pipe 110 . The water flowing into the pump 150 is discharged from the load unit 300 and flows through the second connection pipe 130, and since it flows below a set temperature, the reliability of the pump 150 can be increased.

The case 102 may have a substantially rectangular parallelepiped shape. The case 102 forms a space in which the first connection pipe 110 and the second connection pipe 130 are disposed.

The case 102 includes a mounting plate (not shown) mounted on a wall surface, a lower plate 104 vertically disposed at the bottom of the mounting plate, an upper plate (not shown) vertically disposed at the top of the mounting plate, and a mounting plate. It includes a peripheral plate 106 disposed to extend along the rim of the lower plate 104 and the upper plate on the side of the.

On one side of the case 102, a first connector 170 to which the upstream end of the first connection pipe 110 is connected, a second connector 172 to which the downstream end of the first connection pipe 110 is connected, and a second A third connector 174 to which the upstream end of the connection pipe 130 is connected and a fourth connector 176 to which the downstream end of the second connection pipe 130 is connected are disposed. The first connector 170 , the second connector 172 , the third connector 174 , and the fourth connector 176 are disposed on the lower plate 104 of the case 102 .

A first supply pipe 52 is connected to the first connector 170 . A second discharge pipe 64 is connected to the second connector 172 . The second supply pipe 62 is connected to the third connector 174 . The first discharge pipe 54 is connected to the fourth connector 176 .

Referring to FIG. 5 , the distance D2 between the third connector 174 and the fourth connector 176 connected to the second connection pipe 130 is the first connector connected to the first connection pipe 110. (170) and the second connector 172 is formed shorter than the separation distance (D1).

Referring to FIG. 6 , the first connection pipe 110 and the second connection pipe 130 are disposed inside the case 102 . The length of the first connection pipe 110 is formed longer than the length of the second connection pipe 130 .

An air band 120 is disposed in the first connection pipe 110 to remove water vapor generated from water flowing therein. The first connection pipe 110 is connected to the first connector 170 and flows downward from the top of the 1-1 connection pipe 112 and the 1-1 connection pipe 112 forming a flow path through which water flows upward. It includes a 1-2 connection pipe 122 connected to the circumferential surface of the 1-1 connection pipe 112 at a spaced position. An air band 120 is disposed at the top of the 1-1 connection pipe 112 to discharge steam formed from flowing water. Steam generated from water flowing through the first connection pipe 110 may be removed through the air band 120 .

1-1 The length L1 of the connecting pipe 112 extending upward from the lower plate 104 is the height L2 of the second connecting pipe 130 protruding upward from the lower plate 104 of the case 102 (L2). ) is formed longer than Accordingly, steam formed from water flowing along the first connection pipe 110 can be effectively collected in the airband.

Since the 1-1 connection pipe 112 is formed long in the vertical direction, it may be formed of a plurality of pipes.

The 1-1 connection pipe 112 includes a lower pipe 114 connected to the first connector 170 and an upper pipe 116 disposed above the lower pipe 114 and having an air band 120 disposed thereon. And, it may include a middle pipe 118 connecting the lower pipe 114 and the upper pipe 116.

The middle pipe 118 may be formed of a material different from that of the lower pipe 114 or the upper pipe 116. The middle pipe 118 may be formed of a material having a higher melting point than the lower pipe 114 or the upper pipe 116. The lower pipe 114 and the upper pipe 116 may be formed of a copper material, and the middle pipe 118 may be formed of a stainless steel material. The lower pipe 114 and the middle pipe 118, and the upper pipe 116 and the middle pipe 118 may be joined by welding.

The middle pipe 118 is formed of a material with a higher melting point than the lower pipe 114 or the upper pipe 116, and even if it is joined by welding or the like, it is possible to prevent a leak hole from being formed at the joint.

The 1-2 connection pipe 122 is connected to the 1-1 connection pipe 112 at a position where the 1-1 connection pipe 112 is bent downward from the upper end. Accordingly, a space in which steam discharged to the air band 120 is collected may be formed at the upper end of the 1-1 connection pipe 112 .

The 1-2 connection pipe 122 is a horizontal pipe 124 connected to the 1-1 connection pipe 112 and a vertical pipe extending downward from the end of the horizontal pipe 124 and connected to the second connector 172. (126).

The vertical pipe 126 may form a flow path through which water flows downward. Although not shown in FIG. 6 , an electrically operated heater (not shown) may be disposed in the vertical pipe 126 . The heater 160 (see FIG. 4 ) may additionally heat water supplied to the load unit 300 .

The second connection pipe 130 includes a pump inlet pipe 132 disposed upstream of the pump 150 and a pump discharge pipe 140 disposed downstream of the pump 150 .

A strainer 138 may be disposed in the pump inlet pipe 132 to filter out foreign substances present in water introduced from the load unit 300 . The pump inlet pipe 132 is connected to the third connector 174 and includes a first pump inlet pipe 134 including a bending portion 134b that changes in the flow direction, and one side of the first pump inlet pipe 134 and a second pump inlet pipe 136 connected to the pump 150, respectively.

The first pump inlet pipe 134 is connected to the third connector 174 and is connected to the rising passage forming pipe 134a forming an ascending passage, and the bending portion 134b connected to the ascending passage forming pipe 134a and changing the direction of the passage ), and a downflow passage forming pipe 134c connected to the bending portion 134b and forming a downflow passage. The strainer 138 is disposed at the lower end of the downflow passage forming pipe 134c.

The second pump inlet pipe 136 is connected to the circumference of the first pump inlet pipe 134 at a position spaced upward from the end of the first pump inlet pipe 134 . Therefore, foreign substances included in the water flowing from the load unit 300 may be collected at the lower end of the first pump inlet pipe 134 where the strainer 138 is disposed.

The pump discharge pipe 140 has a bent shape and connects the pump 150 and the fourth connector 176.

Although the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the specific embodiments described above, and in the technical field to which the present invention belongs without departing from the gist of the present invention claimed in the claims. Various modifications and implementations are possible by those skilled in the art, and these modifications should not be individually understood from the technical spirit or perspective of the present invention.

50: first pipe 60: second pipe
100: indoor unit 110: first connection pipe
112: 1-1 connection pipe 120: air band
122: 1-2 connection pipe 132: pump inlet pipe
138: strainer 140: pump discharge pipe
130: second connection pipe 150: pump
160: heater 170: first connector
172: second connector 174: third connector
176: fourth connector 200: outdoor unit
300: load part

Claims (14)

an outdoor unit including a heat exchanger for exchanging heat between a refrigerant and water;
a load unit that uses the heat of the heat-exchanged water as a load;
an indoor unit supplying water flowing from the outdoor unit to the load unit and supplying water flowing from the load unit to the outdoor unit;
the indoor unit,
Case forming the appearance;
a first connection pipe disposed inside the case and sending water flowing from the outdoor unit to the load unit;
a second connection pipe disposed inside the case and sending water flowing from the load unit to the outdoor unit; and
and a pump disposed in the second connection pipe and pumping water from the load unit to the outdoor unit. According to claim 1,
The first connection pipe includes a 1-1 connection pipe extending from the lower plate of the case and forming a flow path through which water flows upward, and the 1-1 connection pipe at a position spaced downward from the upper end of the 1-1 connection pipe. Including 1-2 connection pipes connected to the circumferential surface of 1 connection pipe,
A heat supply device in which an air band for discharging steam formed from flowing water is disposed at an upper end of the 1-1 connection pipe. According to claim 2,
The heat supply device wherein the 1-1 connection pipe extends upward from the lower plate longer than the second connection pipe protrudes upward from the lower plate. According to claim 2,
The 1-1 connection pipe connects a lower pipe connected to the first connector, an upper pipe disposed above the lower pipe and having the air band disposed thereon, and connecting the first pipe and the second pipe. Including middle piping,
The middle pipe is formed of a material different from that of the lower pipe and the upper pipe. According to claim 4,
The middle pipe is formed of a material having a higher melting point than the lower pipe and the upper pipe. According to claim 2,
The 1-2 connection pipe includes a horizontal pipe connected to the 1-1 connection pipe and a vertical pipe extending downward at an end of the horizontal pipe where the lower plate is disposed,
A heat supply device in which a heater for heating water flowing in the vertical pipe is disposed in the vertical pipe. According to claim 1,
The second connection pipe,
It includes a pump inlet pipe disposed on the upstream side of the pump and a pump outlet pipe disposed on the downstream side of the pump,
A heat supply device in which a strainer for filtering out foreign substances present in water flowing in from the load unit is disposed in the pump inlet pipe. According to claim 7,
The pump inlet pipe is a heat supply device having a bent form upstream where the strainer is disposed. According to claim 7,
The pump inlet pipe includes a first pump inlet pipe extending upward from the lower plate and including a bending portion changing in the flow direction, and a second pump inlet pipe connecting one side of the first pump inlet pipe and the pump include,
The heat supply device in which the strainer is disposed at an end of the first pump inlet pipe. According to claim 7,
The second pump inlet pipe is arranged to be connected to the circumference of the first pump inlet pipe at a position spaced upward from an end of the first pump inlet pipe. According to claim 7,
The first pump inlet pipe includes a rising passage forming pipe extending upward from the lower plate and forming a rising passage, a bending portion connected to the rising passage forming pipe and changing the flow direction, and a bending portion connected to the bending portion and descending Including a descending flow path forming pipe forming a flow path,
The strainer is a heat supply device disposed at the lower end of the downflow passage forming pipe. According to claim 1,
The heat supply device wherein the length of the first connection pipe is longer than that of the second connection pipe. According to claim 1,
The case includes a lower plate covering a lower portion,
A heat supply device in which a plurality of connectors are disposed on the lower plate to connect the first connection pipe or the second connection pipe and a pipe connected to the outdoor unit or the load unit. According to claim 13,
The plurality of connectors include a first connector to which the upstream end of the first connection pipe is connected, a second connector to which the downstream end of the first connection pipe is connected, and a third connector to which the upstream end of the second connection pipe is connected. , And a fourth connector to which the downstream end of the second connection pipe is connected,
The heat supply device of claim 1 , wherein a distance between the third connector and the fourth connector disposed on the lower plate is shorter than a distance between the first connector and the second connector disposed on the lower plate.

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