KR102330490B1 - Cooling and heating and hot water system - Google Patents

Abstract

An embodiment of the present invention includes at least one heat pump unit, the heat pump unit comprising: a compressor for compressing a first medium; and a second medium connected to the compressor and different from the first medium and the first medium a first heat exchanger provided so that a medium exchanges heat; a second heat exchanger connected to the first heat exchanger and circulating the first medium; a fan coil unit connected to the first heat exchanger and circulating the second medium; a first storage tank interposed between the first heat exchanger and the fan coil unit and storing the second medium; a third heat exchanger connected to the compressor and provided to exchange heat between the first medium and the second medium; A second storage tank connected to the third heat exchanger and storing the second medium, a first expansion valve interposed between the first heat exchanger and the second heat exchanger, and the circulation direction of the first medium is changed according to an operation mode and a first bypass passage having one end disposed between the third heat exchanger and the selector valve and the other end connected between the first heat exchanger and the second heat exchanger. can do.

Description

{Cooling and heating and hot water system}

It relates to a heating and cooling and hot water supply system, and more particularly, to a heating and cooling and hot water supply system including a heat pump.

A heating/cooling system using a heat pump has the advantage of being able to perform both cooling and heating with one system, and is widely used.

However, in the conventional heating and cooling system using a heat pump, heating and cooling can be used only by operating a heat pump having a refrigerant circulation circuit. .

In addition, the problem of defrosting the outdoor unit always remains a problem. In order to solve this problem, an electric heater or a two-way cycle using two compressors has been used in the outdoor unit. However, this method has a problem of increasing the cost.

In addition, there is a limit in that the efficiency of the heat exchanger used as the air conditioner decreases over time.

An object of the present invention is to provide a heating/cooling and hot water supply system with high energy efficiency and/or power use efficiency.

A cooling/heating and hot water supply system according to an embodiment of the present invention includes at least one heat pump unit, the heat pump unit comprising: a compressor for compressing a first medium; a first heat exchanger connected to the compressor and provided to exchange heat between the first medium and a second medium different from the first medium; a second heat exchanger connected to the first heat exchanger and circulating the first medium; a fan coil unit connected to the first heat exchanger and circulating the second medium; a first storage tank interposed between the first heat exchanger and the fan coil unit and storing the second medium; a third heat exchanger connected to the compressor and provided to exchange heat between the first medium and the second medium; a second storage tank connected to the third heat exchanger and storing the second medium; a first expansion valve interposed between the first heat exchanger and the second heat exchanger; and a switching valve for changing a circulation direction of the first medium according to an operation mode. may include.

In the present invention, the switching valve is connected to the outlet end of the compressor and can control the circulation direction of the first medium discharged from the compressor.

In the present invention, the switching valve may be a four-way valve.

In the present invention, the operation mode may be a hot water supply and heating operation mode, a hot water supply operation mode, a hot water supply and cooling mode, a cooling operation mode, and a heating operation mode.

In the present invention, the hot water supply operation mode provides hot water supply without heating and cooling operation, the hot water supply and heating operation mode provides hot water supply and heating together, and the hot water supply and cooling operation mode provides hot water supply and cooling together, The heating operation mode or the cooling operation mode may provide heating or cooling without hot water supply.

In the present invention, the first solenoid valve disposed between the switching valve and the third heat exchanger; a second solenoid valve disposed on a path intersecting a path through which the first medium flows from the compressor to the third heat exchanger and an outlet path; a third solenoid valve disposed before the first medium flows into the third heat exchanger; and a fourth solenoid valve disposed between the first solenoid valve and the third heat exchanger on a path through which the first medium flows from the third heat exchanger to the switching valve. may further include.

In the present invention, in the case of the hot water supply operation mode, the first solenoid valve is closed and the second solenoid valve, the third solenoid valve, and the fourth solenoid valve are opened, and the first solenoid valve flowing out through the third heat exchanger The medium may bypass the first heat exchanger.

In the present invention, in the case of the hot water supply and cooling operation mode or the hot water supply and cooling operation mode, the first solenoid valve, the third solenoid valve, and the fourth solenoid valve are opened and the second solenoid valve is closed. The first medium flowing out through the third heat exchanger may flow to the switching valve.

In the present invention, in the case of the hot water supply and heating operation mode, the switching valve forms a path so that the first medium flowing out from the third heat exchanger and flowing through the first solenoid valve flows into the first heat exchanger. can

In the present invention, in the case of the hot water supply and cooling operation mode, the switching valve forms a path so that the first medium flowing out from the third heat exchanger and flowing through the first solenoid valve flows into the second heat exchanger. can

In the present invention, in the case of the heating operation mode or the cooling operation mode, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve may be closed, and the first solenoid valve may be opened.

According to embodiments, only one heat pump may provide heating and cooling and hot water supply at the same time. In particular, in summer, only one bottom pump can provide both cooling and hot water supply.

Since the first storage tank is provided to store cold or hot air, the heat pump is operated during a time period when the power demand is low to store a cold or hot first storage medium in the first storage tank, and stored in the first storage tank during a time period when the power demand is high Since the first storage medium can be used, energy can be efficiently managed and energy can be saved.

The first storage medium may improve heating efficiency by receiving heat from the first medium and the second medium during the heating mode.

The first medium emits heat to the first storage medium and the second medium in the heating mode, and thus heating efficiency may be improved by increasing the amount of heat transferred to the outside air.

Since the first medium may receive heat from the first storage medium in the cooling mode, the amount of heat emitted by the first storage medium may be increased to improve cooling efficiency.

The heating/cooling system and the heat pump may improve system stability by injecting a portion of the first medium discharged from the first compressor to prevent overheating of the first compressor.

1 is a block diagram of a heating and cooling system according to an embodiment of the present invention.
FIG. 2 is a configuration diagram illustrating an embodiment of the heat pump unit of FIG. 1 .
FIG. 3 is a block diagram schematically illustrating the heat pump of FIG. 1 .
FIG. 3 is a configuration diagram illustrating a part of an embodiment of the heat pump of FIG. 1 .
4 to 6 is a configuration diagram showing a part of another embodiment of the heat pump.
7 is a diagram illustrating a screen provided by a server unit to a terminal.

Since the embodiments can apply various transformations, specific embodiments are illustrated in the drawings and described in detail in the detailed description. Effects and features of the embodiments, and a method of achieving them will become apparent with reference to the details described below in conjunction with the drawings. However, the present embodiments are not limited to the embodiments disclosed below and may be implemented in various forms.

Hereinafter, the embodiments will be described in detail with reference to the accompanying drawings, and when described with reference to the drawings, the same or corresponding components are given the same reference numerals, and the overlapping description thereof will be omitted.

In the following embodiments, terms such as first, second, etc. are used for the purpose of distinguishing one component from other components without limiting meaning.

In the following examples, the singular expression includes the plural expression unless the context clearly dictates otherwise.

In the following embodiments, terms such as include or have means that the features or components described in the specification are present, and the possibility that one or more other features or components may be added is not excluded in advance.

In the drawings, the size of the components may be exaggerated or reduced for convenience of description. For example, since the size and thickness of each component shown in the drawings are arbitrarily indicated for convenience of description, the following embodiment is not necessarily limited to the illustrated bar.

1 is a block diagram of a heating and cooling system according to an embodiment.

Referring to FIG. 1 , the air conditioning system according to the embodiment may include at least one heat pump unit 1 , a host unit 2 , and a server unit 3 .

A plurality of heat pump units 1 may be provided. Each heat pump unit 1 may include a heat pump 11 . Each of the heat pump units 1 may be electrically connected to the host unit 2 .

The host unit 2 may be a computer device capable of controlling the plurality of heat pump units 1 . The host unit 2 provides a user with an environment capable of controlling the operation of the plurality of heat pump units 1 .

The host unit 2 may include a first communication unit 21 . The first communication unit 21 may communicate with the second communication unit 31 of the server unit 3 . The first communication unit 21 and the second communication unit 31 may be wired or wireless communication means.

As shown in FIG. 1 , the server unit 3 may communicate with the host unit 2 to manage the operation state, error state, and/or power state of the heat pump unit 1 .

1 shows that the server unit 3 communicates with one host unit 2, the present invention is not necessarily limited thereto, and a plurality of host units and a plurality of heat pump units connected thereto can be managed by

The embodiment according to FIG. 1 may control the heat pump unit 1 through the terminal 4 . The terminal 4 includes a device capable of communicating with the server unit 3 by wire or wireless. The terminal 4 may be a computer, a mobile device, etc. having a built-in communication function. The server unit 3 may allow access to the authorized terminal 4 . The server unit 3 may provide a screen for controlling the heat pump unit 1 to the connected terminal 4 . This will be described later with reference to FIG. 8 .

Connecting the terminal 4 to the server unit 3

2 is a configuration diagram illustrating an embodiment of the heat pump unit 1 .

An embodiment of the heat pump unit 1 includes a heat pump 11 , a first control unit 12 connected to the heat pump 11 , a second control unit 13 connected to the first control unit 12 , and a second control unit It may include a manipulation unit 14 connected to (13).

The heat pump 11 will be described in more detail below.

The first control unit 12 may be electrically connected to various components of the heat pump 11 , for example, a temperature sensor, a pressure sensor, a compressor, a pump, a fan, a valve, and the like to control the corresponding components.

The second control unit 13 may be electrically connected to the first control unit 12 . The second control unit 13 may control the operation of the first control unit 12 . As an example, the second control unit 13 may switch the first control unit 12 .

The manipulation unit 14 may be electrically connected to the second control unit 13 . However, the present invention is not necessarily limited thereto, and the operation unit 14 may be directly electrically connected to the first control unit 12 . Although not shown in the drawing, the manipulation unit 14 may include a display, and the display may display the temperature of the refrigerant. It may include a switch for switching operations such as cooling operation, heating operation, and defrost.

3 is a configuration diagram showing the configuration of an embodiment of the heat pump 11 in more detail.

Referring to FIG. 3 , the heat pump 11 includes a compressor 111 , a first heat exchanger 121 , a second heat exchanger 122 , a third heat exchanger 123 , a fan coil unit 133 , and a first It may include a storage tank 131 , a second storage tank 132 , a first expansion valve 141 , and first to fourth solenoid valves 162a , 162b , 162c , and 162d .

More specifically, the compressor 111 may compress the first medium into high-temperature and high-pressure hot gas. The first medium may be a refrigerant.

A first flow path 181 through which the first medium flows from the compressor 111 to the switching valve 163 may be formed. A third heat exchanger 123 may be disposed in the first flow path 181 .

A second storage tank 132 may be located spaced apart from the third heat exchanger 123 . A second circulation path 192 may be formed between the third heat exchanger 123 and the second storage tank 132 . A second medium different from the first medium may flow in the second circulation path 192 . That is, the second medium may circulate through the third heat exchanger 123 and the second storage tank 132 along the second circulation path.

The second storage tank 132 may store a second medium. The second storage tank 132 may include an outlet 101 for discharging the second medium to the outside. The second medium may be water. Water, which is the second medium, may be discharged to the outside through the outlet 101 to be used.

A second circulation pump 152 may be disposed in the second circulation path 192 . The second circulation pump 152 may function to smoothly circulate the second medium in the second circulation path 192 .

The second circulation path 192 may pass through the third heat exchanger 123 . The second circulation path 192 may be disposed to correspond to the first flow path 181 in the third heat exchanger 123 . The second circulation path 192 may exchange heat with the first flow path 181 in the third heat exchanger 123 . That is, the first medium of high temperature and high pressure by the compressor 111 may flow through the first flow path 181 in the third heat exchanger 123 . Heat exchange may be performed between the high-temperature and high-pressure first medium of the first flow path 181 passing through the third heat exchanger 123 and the second medium of the second circulation path 191 . In the third heat exchanger 123 , the heat of the first medium may be transferred to the second medium of the second circulation path 191 to increase the temperature of the second medium.

The second medium having a high temperature may be supplied to the second storage tank 132 along the second circulation path 191 . When the second medium is water, the second storage tank 132 may be a hot water supply tank for supplying hot water. An outlet may be provided at one end of the second storage tank 132 . The user can use the hot water stored in the second storage tank 132 through the outlet, that is, hot water all year round.

In the present invention, the configuration of the third heat exchanger 123 , the second circulation path 192 , and the second storage tank 132 are not necessarily included in the heat pump 11 , and in some embodiments, the first flow path 181 may be directly connected to the switching valve 163 without going through the third heat exchanger 123 .

A third solenoid valve 162c and a fourth solenoid valve 162d may be disposed on the first flow path 181 . In detail, the third solenoid valve 162c is disposed in the first flow path 181 entering the third heat exchanger 123 , and the fourth solenoid valve is disposed in the first flow path 181 exiting the third heat exchanger 123 . 162d may be disposed.

In the hot water supply operation mode, the hot water supply and heating operation mode, and the hot water supply and cooling operation mode, the third solenoid valve 162c and the fourth solenoid valve 162d may be opened. The first medium flows into the third heat exchanger 123 through the opened third solenoid valve 162c, and flows out from the third heat exchanger 123, the fourth solenoid valve 162d and the second solenoid valve 162b. ) through the selector valve 163 , and may flow into and out of the third heat exchanger 123 along the second flow path 182 from the selector valve 163 .

In the heating operation mode, the cooling operation mode, and the heating and cooling operation mode, the third solenoid valve 162c and the fourth solenoid valve 162d may be closed. It is possible to prevent the first medium from flowing into and out of the third heat exchanger 123 by the closed third solenoid valve 162c and the fourth solenoid valve 162d. That is, in the case of the heating operation mode, the cooling operation mode, and the heating and cooling operation mode, the first medium from the compressor 111 flows along the first flow path 181 and the ninth flow path 189 and opens the first solenoid valve It may be introduced into the switching valve 163 through the (162a). The second solenoid valve 162b is closed, so that the first medium does not flow toward the eighth flow path 188 on the ninth flow path 189 . The first medium may flow into and out of the third heat exchanger 123 along the second flow path 182 from the switching valve 163 .

An operation according to each driving mode will be described later.

The first flow path 181 exiting the third heat exchanger 123 may be connected to a switching valve 163 . A fourth solenoid valve 162d and a first solenoid valve 162a may be disposed between the third heat exchanger 123 and the switching valve 163 .

The first solenoid valve 162a may allow the first medium from the third heat exchanger 123 to flow to the selector valve 163 or block the flow of the first medium to the selector valve 163 .

That is, the first medium from the compressor 111 may pass through the third heat exchanger 183 along the first flow path 181 , and the flow of the first medium may be determined by the first solenoid valve 162a. When the first solenoid valve 162a is opened, the first medium may flow into the selector valve 163 , and when the first solenoid valve 162a is closed, the first medium is prevented from going to the selector valve 163 . can

The first medium flowing to the selector valve 163 after the first solenoid valve 162a is opened, the selector valve 163 sends the first medium directly to the first heat exchanger 121 or second heat exchange depending on the selected operation mode. It can be sent to the group 121.

When the operation mode is hot water supply and heating operation mode, the selector valve 163 sends the first medium to the first heat exchanger 121, and when the operation mode is hot water supply and cooling mode, the selector valve 163 operates the first medium can be sent to the second heat exchanger 122 . The first medium flowing into the second heat exchanger 122 may be introduced into the first heat exchanger 121 along the seventh flow path 187 .

In the hot water supply and cooling mode, the direction in which the first medium flows into the first heat exchanger 121 may be opposite to the direction in which the first medium flows into the first heat exchanger 121 in the hot water supply and heating mode. This will be described later.

A ninth flow path 189 may branch in the first flow path 181 between the switching valve 163 and the third heat exchanger 123 . In detail, the ninth flow path 189 includes a first flow path 181 , which is a path through which the first medium flows from the compressor 111 to the third heat exchanger 123 , and a first medium through the third heat exchanger 123 . It may be a path that intersects each of the first flow paths 181 that are paths flowing out from the .

The ninth flow path 189 may be connected to the eighth flow path 188 without passing through the second heat exchanger 121 .

A second solenoid valve 162b may be disposed in the ninth flow path 189 . The second solenoid valve 162b may open and close the ninth flow path 189 to control whether or not the first medium flows in the ninth flow path 189 .

For example, when the second solenoid valve 162b is closed, the first solenoid valve 162a is opened, and both the third solenoid valve 162c and the fourth solenoid valve 162d are opened, the third heat exchanger The first medium from 123 may be introduced into the switching valve 163 . Unlike this, when the second solenoid valve 162b is opened and the first solenoid valve 162a is closed, the first medium from the third heat exchanger 123 may be introduced into the ninth flow path 189 . The ninth flow path 189 may be bypassed without being connected to the first heat exchanger 121 .

When the second solenoid valve 162b is closed and the first solenoid valve 162a is opened and the first medium from the third heat exchanger 123 flows into the switching valve 163, although the path is different, the first heat exchanger It flows into the 121 and heats or cools the second medium in the first circulation path 191 to operate as heating or cooling.

That is, in the case of hot water supply and heating operation mode or hot water supply and cooling operation mode, the second solenoid valve 162b is closed, the first solenoid valve 162a is opened, and the third and fourth electric bar valves 162c and 162d are opened. can be The switching valve 163 into which the first medium is introduced may change the path of the first medium according to the operation mode.

In detail, in the hot water supply and heating operation mode, the switching valve 163 may introduce the first medium into the second flow path 182 . The second flow path 182 is connected to the first heat exchanger 121 , and the first medium may be introduced into the first heat exchanger 121 . The first heat exchanger 121 may heat the second medium introduced through the first circulation path 191 . The heated second medium may be used for heating. In the hot water supply and heating operation mode in the above manner, hot water supply and heating may be performed together.

In the hot water supply and cooling operation mode, the switching valve 163 may introduce the first medium into the fifth flow path 185 . The fifth flow path 185 is connected to the second heat exchanger 122 , and the first medium may be introduced into the second heat exchanger 122 . The second heat exchanger 122 may be installed outdoors or buried underground. In the second heat exchanger 122 , the first medium may be exchanged with external air or geothermal heat or may be exchanged with waste heat. The heat-exchanged first medium may be introduced into the first heat exchanger. The first heat exchanger 121 may cool the second medium introduced through the first circulation path 191 . The cooled second medium may be used for cooling. In the hot water supply and cooling operation mode in the above manner, hot water supply and cooling may be performed together.

Accordingly, according to an embodiment of the present invention, heating and hot water supply can be simultaneously provided by the hot water supply and heating operation mode described above, and cooling and hot water supply can be simultaneously provided by the hot water supply and cooling operation mode.

A sixth flow path 186 through which the first medium flows from the switching valve 163 to the liquid separator 134 may be formed. The liquid separator 134 and the compressor 111 may be connected through a sixth flow path 186 . The first medium flowing out from the switching valve 163 to the sixth flow path 186 may be introduced into the compressor 111 through the liquid separator 134 and then through the sixth flow path 186 connected to the compressor 111 again. have.

The first storage tank 131 may be located spaced apart from the first heat exchanger 121 . A first circulation path 191 through which the second medium flows may be formed between the first heat exchanger 121 and the first storage tank 131 . The first storage tank 131 may store the second medium.

A first circulation pump 151 may be disposed in the first circulation path 191 . The first circulation pump 151 may allow the second medium to circulate smoothly in the first circulation path 191 .

The first circulation path 191 may pass through the first heat exchanger 121 and may be disposed to be heat-exchangeable with the second flow path 182 in the first heat exchanger 121 . Accordingly, the first medium flowing in the second flow path 182 in the first heat exchanger 121 and the second medium of the first circulation path 191 may exchange heat. The second medium having completed heat exchange in the first heat exchanger 121 may be supplied to the first storage tank 131 .

The fan coil unit 133 may be disposed spaced apart from the first storage tank 131 . A third circulation path 193 through which the second medium flows may be formed between the first storage tank 131 and the fan coil unit 133 . A third circulation pump 153 is disposed in the third circulation path 193 so that the circulation of the second medium in the third circulation path 193 can be made smoothly.

The third circuit 193 passes through the fan coil unit 133, and by operating the fan, the cold air or hot air of the second medium flowing through the third circuit 193 may be supplied to the room.

3 shows one third circulation path 193 and the fan coil unit 133, the present invention is not necessarily limited thereto, and the plurality of third circuit paths 193 and the fan coil unit 133 are provided in the first By being connected to the storage tank 131, it is possible to cool and heat a plurality of places.

In the above embodiment, the cold air or heat of the first medium flowing through the first heat exchanger 121 is not transferred to the room as it is, but heat exchanges with the second medium first, and the heat-exchanged second medium is transferred to the first storage tank 131 . After being stored in the , the cold air or heat of the second medium may be transferred to the room by using the fan coil unit 133 . Therefore, it is preferable that the first storage tank 131 be insulated to store the cold or hot air of the heat pump 11 for a predetermined time.

In the above embodiment, since the first storage tank 131 is provided to store cold or hot air, the heat pump 11 is operated during a time period when the power demand is low to store a cold or hot second medium in the first storage tank 131 . In addition, a method of transferring cold air or hot air from the second medium to the room using the fan coil unit 133 during a time when power demand is high may be taken. Therefore, energy efficiency can be improved.

In addition, it is possible to efficiently manage the energy consumption of each place by reading the amount of electricity used for heating and cooling of each individual place in real time, and it is possible to save energy by efficiently managing the flow rate supply of the second medium for individual heating and cooling.

As described above, the second flow path 182 may be connected to the receiver 135 through the first heat exchanger 121 . A check valve 161 may be installed in the second flow path 182 between the first heat exchanger 121 and the receiver 135 . The check valve 161 may prevent the first medium from flowing back in the second flow path 182 , that is, from the receiver 135 to the first heat exchanger 121 .

A third flow path 183 through which the first medium flows from the receiver 135 to the first expansion valve 141 may be formed. Although not shown in the drawings, a liquid line filter dryer and/or sight glass may be further installed in the third flow path 183 .

The first medium may be decompressed in the first expansion valve 141 .

A second heat exchanger 122 is positioned spaced apart from the first expansion valve 141 , and a fourth flow path 184 through which the first medium flows is formed between the first expansion valve 141 and the second heat exchanger 122 . is formed A check valve 161 may be installed in the fourth flow path 184 to prevent a reverse flow of the first medium in the fourth flow path 184 .

The second heat exchanger 122 may be an outdoor unit. In the second heat exchanger 122 which is an outdoor unit, the first medium may exchange heat with the outside air. In addition to this, the second heat exchanger 122 may be buried underground so that geothermal heat and the first medium exchange heat or heat exchange with waste heat.

A fifth passage 185 through which the first medium flows from the second heat exchanger 122 to the selector valve 163 is formed, and a sixth passage 186 through which the first medium flows from the selector valve 163 to the compressor 111 . ) can be formed. The sixth flow path 186 may pass through the liquid separator 134 to prevent the liquid component from being contained in the first medium flowing into the compressor 111 . In the sixth flow path 186 , for example, a suction strainer (not shown) may be further installed between the liquid separator 134 and the compressor 111 . The suction strainer may filter impurities from the first medium flowing into the compressor 111 .

Meanwhile, as shown in FIG. 3 , the seventh flow passage 187 may be branched from the fourth flow passage 184 to be connected to the second flow passage 182 . That is, one end of the seventh passage 187 is connected between the first expansion valve 141 and the check valve 161 of the fourth passage 184 , and the other end of the seventh passage 187 is connected to the second passage ( 182) may be connected to a position between the first heat exchanger 121 and the check valve 161.

In addition, the eighth flow path 188 may be branched from the fourth flow path 184 to be connected to the second flow path 182 . That is, one end of the eighth passage 188 is connected between the check valve 161 of the fourth passage 184 and the second heat exchanger 122 , and the other end of the eighth passage 188 is connected to the second passage ( 182) may be connected to a position between the check valve 161 and the liquid separator 134.

A check valve 161 may be installed in the seventh flow path 187 to induce the first medium to flow only in the direction of the first heat exchanger 121 . A check valve 161 may be installed in the eighth flow path 188 to induce flow. The seventh flow path 187 and the eighth flow path 188 may allow the first medium to flow only in the cooling mode without flowing the first medium in the heating mode.

The embodiment shown in FIG. 3 may further include a first bypass path 201 . The first bypass passage 201 has one end connected to the third passage 183 and the other end of the compressor 111 in the sixth passage 186 adjacent to the compressor 111 in the sixth passage 186 . ) and the liquid separator 134)).

A fourth heat exchanger 124 may be installed in the first bypass path 201 . A third flow path 183 may pass through the fourth heat exchanger 124 .

A second expansion valve 142 and a fifth solenoid valve 162 may be installed between one end of the first bypass passage 201 connected to the third passage 183 and the fourth heat exchanger 124 . .

Accordingly, the first medium flowing through the first bypass passage 201 passes through the second expansion valve 142 and the fifth solenoid valve 162 to the first medium in the third passage 183 in the fourth heat exchanger 124 . can exchange heat with each other.

The third flow path 183 from the fourth heat exchanger 124 may be connected to a point where the fourth flow path 184 and the seventh flow path 187 are connected. A first expansion valve 141 and a T-type valve 164 may be disposed on the fourth flow path 184 between the connection point of the fourth flow path 184 and the seventh flow path 187 and the fourth heat exchanger 124 . have.

In the hot water supply and heating operation mode, the first medium coming out of the fourth heat exchanger 124 through the third flow path 183 passes through the first expansion valve 141 and the T-type valve 164 to the fourth flow path 184 . may be introduced into the second heat exchanger 122 through the Thereafter, the first medium may be re-introduced into the compressor 111 through the switching valve 163 .

The first medium may be decompressed in the first expansion valve 141 .

In the case of hot water supply and cooling operation mode, the first medium coming out from the fourth heat exchanger 124 through the third flow path 183 passes through the first expansion valve 141 and the T-type valve 164 to the seventh flow path 187 . may be introduced into the first heat exchanger 121 through the

The fourth heat exchanger 124 may function as an economizer. By heat-exchanging the first medium to be passed through the T-type valve 164 in advance, the heating and cooling efficiency can be increased by about 20 to 30%.

Various sensors may be installed in the heat pump according to the above-described embodiment.

For example, the temperature sensor 171 may be installed at the inlet and outlet of the first heat exchanger 121 of the first circulation passage 191 and the inlet and outlet of the third heat exchanger 123 of the second circulation passage 192, respectively. In addition, the temperature sensor may be installed in the first storage tank 131 and the second storage tank 132 to measure the temperature of the second medium. Also, it is installed at the outlet of the compressor 171 to measure the temperature of the first medium exiting the compressor 171 . The fourth flow passage 184 and the fifth flow passage 185 may be installed adjacent to the second heat exchanger 122 , and may also be installed in the second heat exchanger 122 .

A flow pouch 172 is installed in the first circulation passage 191 to control or check the flow of the second medium in the first circulation passage 191 .

In addition, a pressure sensor 173 may be installed at the outlet and the inlet of the compressor 111 to check the pressure of the first medium flowing in and out of the compressor 111 .

In addition, a differential pressure sensor 174 may be installed in the second heat exchanger 122 to check the pressure difference between the first medium flowing into and out of the second heat exchanger 122 .

Next, the operation of the heat pump according to the embodiment will be described.

First, hot water supply and heating operation modes will be described.

In the hot water supply and heating operation mode, the first solenoid valve 162a, the third solenoid valve 162c, and the fourth solenoid valve 162d may be opened, and the second solenoid valve 162b may be closed.

The first medium, which is a high-temperature and high-pressure gas discharged from the compressor 111 , flows through the first flow path 181 through the third solenoid valve 162c to the third heat exchanger 123 , and the third heat exchanger 123 . in the second storage tank 132 and heat exchange with the second medium to heat the second medium. When the heated second medium is water, after being stored in the second storage tank 132, it may be used as hot water by the user.

The first medium from the third heat exchanger 123 flows into the switching valve 163 through the opened fourth solenoid valve 162d and the first solenoid valve 162a, and in the second flow path from the switching valve 163 . It may flow to the first heat exchanger 121 through 182 .

The first heat exchanger 121 may heat the second medium by exchanging heat with the second medium from the first storage tank 131 . The heated second medium provides heat to the user through the fan coil unit 133 through the third circulation passage 193 . When the fan coil unit 133 is disposed indoors, heating may be provided in the room.

The first medium from the first heat exchanger 121 may be introduced into the receiver 135 through the check valve 161 of the second flow path 182 .

The first medium from the receiver 135 may be introduced into the fourth heat exchanger 124 through the third flow path 183 . The first medium flowing into the fourth heat exchanger 124 through the third flow path 183 is heat-exchanged with the first medium flowing into the fourth heat exchanger 124 through the first bypass path 201 . Then, it may come out through the third flow path 183 and enter the fourth flow path 184 through the first expansion valve 141 and the T-type valve 164 . The first medium flowing into the fourth flow path 184 may be introduced into the second heat exchanger 122 through the check valve 161 of the fourth flow path 184 .

In the second heat exchanger 122, the first medium exchanges heat with the outside and then flows into the selector valve 163 through the fifth passage 185, and the liquid separator ( 134) and may be introduced into the compressor 111 again.

In this heating operation mode, the temperature difference between the first medium inlet and outlet of the second heat exchanger 122 serving as the outdoor unit, for example, the fourth flow path 184 and the fifth flow path 185 is checked, and the differential pressure sensor 174 is used. By checking the pressure difference between the inlet and outlet of the second heat exchanger 122 of the first medium, it is possible to detect frost and freezing problems that may occur in the second heat exchanger 122 in advance. When the second heat exchanger 122 has a problem of frost and icing to a certain degree or more, the server unit 3, the host unit 2, or the operation unit 14 operates the first medium in a reverse cycle from the compressor 111 in a reverse cycle. The first medium gas may be supplied to the second heat exchanger 122 to be defrosted. Accordingly, the heating efficiency of the heat pump can be managed as efficiently as possible. Such management may be automatically managed by the first control unit 12 .

The first control unit 12 manages the refrigerant temperature at the inlet side of the compressor 111 , automatically controls the operation and stop of the fans installed in the heat pump 111 , and manages unnecessary fan operation time to efficiently use electricity can be managed with

Next, the hot water supply operation mode will be described. The hot water supply operation mode is an operation mode that provides hot water without heating.

In the hot water supply operation mode, the second solenoid valve 162b, the third solenoid valve 162c, and the fourth solenoid valve 162d may be opened, and the first solenoid valve 162a may be closed.

The first medium, which is a high-temperature and high-pressure gas discharged from the compressor 111 , flows through the first flow path 181 through the third solenoid valve 162c to the third heat exchanger 123 , and the third heat exchanger 123 . in the second storage tank 132 and heat exchange with the second medium to heat the second medium. When the heated second medium is water, after being stored in the second storage tank 132, it may be used as hot water by the user.

The first medium from the third heat exchanger 123 may be introduced into the ninth flow path 189 through the opened fourth solenoid valve 162d and the second solenoid valve 162b. In the hot water supply operation mode, in order for the first medium to flow into the ninth flow path 189 , the second solenoid valve 162b is opened, and the first solenoid valve 162b is closed.

The first medium flowing through the ninth flow path 189 may be introduced into the receiver 135 through the second flow path 182 .

The first medium from the receiver 135 may be introduced into the fourth heat exchanger 124 through the third flow path 183 . The first medium flowing into the fourth heat exchanger 124 through the third flow path 183 is heat-exchanged with the first medium flowing into the fourth heat exchanger 124 through the first bypass path 201 . Then, it may come out through the third flow path 183 and enter the fourth flow path 184 through the first expansion valve 141 and the T-type valve 164 . The first medium flowing into the fourth flow path 184 may pass through the check valve 161 of the fourth flow path 184 and flow into the second heat exchanger 122 .

In the second heat exchanger 122, the first medium exchanges heat with the outside and then flows into the selector valve 163 through the fifth passage 185, and the liquid separator ( 134) and may be introduced into the compressor 111 again.

As described above, in one embodiment of the present invention, the first medium flowing out from the third heat exchanger 123 through the ninth flow path 189 flows into the receiver 135 without passing through the first heat exchanger 121 . Therefore, it can be used only by hot water supply without heating operation.

Next, hot water supply and cooling operation modes will be described.

In the hot water supply and cooling operation mode, the first solenoid valve 162a, the third solenoid valve 162c, and the fourth solenoid valve 162d may be opened, and the second solenoid valve 162b may be closed.

The first medium, which is a high-temperature and high-pressure gas discharged from the compressor 111 , flows through the first flow path 181 through the first solenoid valve 162a to the third heat exchanger 123 , and the third heat exchanger 123 . in the second storage tank 132 and heat exchange with the second medium to heat the second medium. When the heated second medium is water, after being stored in the second storage tank 132, it may be used as hot water by the user.

The first medium from the third heat exchanger 123 may be introduced into the switching valve 163 through the opened fourth solenoid valve 162d and the first solenoid valve 162a. The switching valve 163 may flow the first medium to the second heat exchanger 122 through the fifth flow path 185 .

In the second heat exchanger 122 , the first medium exchanges heat with the outside and then flows into the eighth passage 188 through the fourth passage 184 . After passing through the check valve 161 of the eighth flow path 188 , it may join the second flow path 182 and pass through the receiver 135 .

The first medium from the receiver 135 may be introduced into the fourth heat exchanger 124 through the third flow path 183 . The first medium flowing into the fourth heat exchanger 124 through the third flow path 183 is heat-exchanged with the first medium flowing into the fourth heat exchanger 124 through the first bypass path 201 . Then, it may come out through the third flow path 183 and enter the seventh flow path 187 through the first expansion valve 141 and the T-type valve 164 . The first medium flowing into the seventh passage 187 may pass through the check valve 161 of the seventh passage 187 and flow into the first heat exchanger 121 .

The first medium introduced into the first heat exchanger 121 exchanges heat with the second medium from the first storage tank 131 to cool the second medium. The cold second medium may provide cool air to the user through the fan coil unit 133 through the third circulation passage 193 .

The first medium from the first heat exchanger 121 flows into the switching valve 163 through the second flow path 182 , and through the liquid separator 134 of the sixth flow path 186 from the switching valve 163 . It may be introduced into the compressor 11 again.

As described above, in the hot water supply and cooling operation mode, only one compressor 111 can use hot water while maintaining cooling in the indoor space in summer.

According to an embodiment of the present invention, a heating operation mode or a cooling operation mode is also possible. The heating operation mode is a mode for providing heating without hot water supply, and the cooling operation mode is a mode for providing cooling without hot water supply.

In the case of the heating operation mode, the second solenoid valve 162b, the third solenoid valve 162c, and the fourth solenoid valve 162d may be closed, and the first solenoid valve 162a may be opened.

The first medium, which is a high-temperature and high-pressure gas discharged from the compressor 111, moves along the first flow path 181, and cannot be introduced into the third heat exchanger 123 by the closed third solenoid valve 162c, It flows along the ninth flow path 189 connected to the first flow path 181 . The second solenoid valve 162b on the ninth flow path 189 is closed so that the first medium is connected to the ninth flow path 189 and the switching valve 163 along the first flow path 181 leading to the switching valve 163. is introduced into

The switching valve 163 may flow the first medium into the second flow path 182 connected to the first heat exchanger 121 . The first medium may flow to the first heat exchanger 121 through the second flow path 182 .

The first heat exchanger 121 may heat the second medium by exchanging heat with the second medium from the first storage tank 131 . The heated second medium provides heat to the user through the fan coil unit 133 through the third circulation passage 193 . When the fan coil unit 133 is disposed indoors, heating may be provided in the room.

The first medium from the first heat exchanger 121 may be introduced into the receiver 135 through the check valve 161 of the second flow path 182 .

The first medium from the receiver 135 may be introduced into the fourth heat exchanger 124 through the third flow path 183 . The first medium flowing into the fourth heat exchanger 124 through the third flow path 183 is heat-exchanged with the first medium flowing into the fourth heat exchanger 124 through the first bypass path 201 . Then, it may come out through the third flow path 183 and enter the fourth flow path 184 through the first expansion valve 141 and the T-type valve 164 . The first medium flowing into the fourth flow path 184 may be introduced into the second heat exchanger 122 through the check valve 161 of the fourth flow path 184 .

In the second heat exchanger 122, the first medium exchanges heat with the outside and then flows into the selector valve 163 through the fifth passage 185, and the liquid separator ( 134) and may be introduced into the compressor 111 again.

In the case of the heating operation mode, the second solenoid valve 162b, the third solenoid valve 162c, and the fourth solenoid valve 162d may be closed, and the first solenoid valve 162a may be opened.

The first medium, which is a high-temperature and high-pressure gas discharged from the compressor 111, moves along the first flow path 181, and cannot be introduced into the third heat exchanger 123 by the closed third solenoid valve 162c, It flows along the ninth flow path 189 connected to the first flow path 181 . The second solenoid valve 162b on the ninth flow path 189 is closed so that the first medium is connected to the ninth flow path 189 and the switching valve 163 along the first flow path 181 leading to the switching valve 163. is introduced into

The switching valve 163 may flow the first medium into the fifth flow path 185 connected to the second heat exchanger 122 . The first medium may flow to the second heat exchanger 122 through the fifth flow path 185 . .

After the first medium exchanges heat with the outside in the second heat exchanger 122 , it flows into the eighth passage 188 through the fourth passage 184 . After passing through the check valve 161 of the eighth flow path 188 , it may join the second flow path 182 and pass through the receiver 135 .

The first medium from the receiver 135 may be introduced into the fourth heat exchanger 124 through the third flow path 183 . The first medium flowing into the fourth heat exchanger 124 through the third flow path 183 is heat-exchanged with the first medium flowing into the fourth heat exchanger 124 through the first bypass path 201 . Then, it may come out through the third flow path 183 and enter the seventh flow path 187 through the first expansion valve 141 and the T-type valve 164 . The first medium flowing into the seventh passage 187 may pass through the check valve 161 of the seventh passage 187 and flow into the first heat exchanger 121 .

The first medium introduced into the first heat exchanger 121 exchanges heat with the second medium from the first storage tank 131 to cool the second medium. The cold second medium may provide cool air to the user through the fan coil unit 133 through the third circulation passage 193 .

The first medium from the first heat exchanger 121 flows into the switching valve 163 through the second flow path 182 , and through the liquid separator 134 of the sixth flow path 186 from the switching valve 163 . It may be introduced into the compressor 11 again.

As described above, according to an embodiment of the present invention, hot water supply and heating operation mode, hot water supply and cooling operation mode, hot water supply operation mode as well as hot water supply operation mode through the control of the first to fourth solenoid valves 162a, 162b, 162c, 162d It can be operated in either the heating operation mode or the cooling operation mode without it.

4 is a configuration diagram illustrating a part of another embodiment of the heat pump.

The embodiment shown in FIG. 4 further includes a second bypass path 202 . The second bypass passage 202 may have one end connected to the first passage 181 and the other end connected to the fourth passage 184 . A fifth solenoid valve 162 and a check valve 161 are installed in the second bypass passage 202 to selectively open and close, and to prevent a reverse flow.

By selectively supplying the first medium of high temperature and high pressure from the compressor 111 to the second heat exchanger 122 , it is possible to solve the problem of frost and freezing in the second heat exchanger 122 .

5 is a configuration diagram illustrating a part of another embodiment of the heat pump.

The embodiment shown in FIG. 5 further includes a third bypass path 203 . The third bypass passage 203 has one end connected to a position close to the first storage tank 131 of the first circulation passage 191 , and the other end of the first heat exchanger 121 of the first circulation passage 191 . connected to a location close to A fourth circulation pump 154 may be installed in the third bypass path 203 , and a check valve 161 may be installed. A fifth solenoid valve 162 may be installed at a position between the third bypass passage 203 of the first circulation passage 191 to block the second medium from flowing through the first circulation passage 191 .

A first drainage passage 204 is connected to the first circulation passage 191 on the opposite side where the third bypass passage 203 is installed, and a first circulation passage adjacent to the first drainage passage 204 and the first drainage passage 204 ( 191), a fifth solenoid valve 162 may be installed, respectively.

The third bypass passage 203 and the first drain passage 204 are operated while the heat pump is stopped, and the second medium flows in the first circulation passage 191 by the fourth circulation pump 154 and The inside of the first heat exchanger 121 can be cleaned by allowing it to pass through the inside of the first heat exchanger 121 in the opposite direction. Accordingly, it is possible to increase the efficiency and extend the life of the first heat exchanger 121 used for both heating and cooling.

6 is a configuration diagram illustrating a part of another embodiment of the heat pump.

The embodiment shown in FIG. 6 further includes a fourth bypass path 205 . The fourth bypass passage 205 has one end connected to a position close to the second storage tank 132 of the second circulation passage 192 , and the other end of the third heat exchanger 123 of the second circulation passage 192 . connected to a location close to A fifth circulation pump 155 may be installed in the fourth bypass passage 205 , and a check valve 161 may be installed therein. A fifth solenoid valve 162 may be installed at a position between the second circulation passage 192 and the fourth bypass passage 205 to block the second medium from flowing through the second circulation passage 192 .

A second drainage passage 206 is connected to the second circulation passage 192 on the opposite side where the fourth bypass passage 205 is installed, and a second circulation passage adjacent to the second drainage passage 206 and the second drainage passage 206 ( A fifth solenoid valve 162 may be installed in each of the 192).

The fourth bypass passage 205 and the second drain passage 206 are operated while the heat pump is stopped, and the second medium flows in the second circulation passage 192 by the fifth circulation pump 155 and By allowing the inside of the third heat exchanger 123 to pass in the opposite direction, it is possible to clean the inside of the third heat exchanger 123 . Accordingly, it is possible to increase the efficiency and extend the life of the third heat exchanger 123 .

7 is a diagram illustrating a screen provided by a server unit to a terminal.

Referring to FIG. 7 , the server unit 3 may include an authentication procedure. The terminal 4 may access the server unit 3 by performing the authentication procedure of the server unit 3 . As shown in FIG. 8 , the server unit 3 may provide a screen configuration capable of controlling the heat pump unit 1 for the authenticated terminal 4 . In the screen configuration 500 provided by the heat pump unit 1 to the terminal 4, a status display unit 501 indicating the state of components in the heat pump unit 1 and a mode display unit 502 that can control the mode may include.

The status display unit 501 may display the states of components of the heat pump unit 1 , for example, a heat exchanger, a storage tank, a flow path, and a refrigerant. A temperature sensor, a pressure sensor, etc. are disposed in a heat exchanger, a storage tank, a flow path, and the like, and sense the temperature and pressure thereof. The sensed temperature and pressure are transmitted to the control unit, and the control unit may transmit state information of the components to the server unit 3 . The server unit 3 provides status information of the components to the connected terminal 4 , and the terminal 4 may display the status information of the components in the screen configuration 500 .

The mode display unit 502 may display the operation mode of the heat pump unit 1 . The mode display unit 502 may display, for example, a heating operation, a cooling operation, and a hot water supply operation mode. The user may select the driving mode displayed on the mode display unit 502 . The user may select the driving mode by touching the driving mode displayed on the terminal 4 or using an input device such as a keyboard or mouse. When the user selects a heating operation on the mode display unit 502 , the terminal 4 transmits a heating operation selection signal to the server unit 4 , and the server unit 4 sends a heating operation selection signal to the host unit 2 . and the host unit 2 may control the heat pump unit 1 according to the heating operation selection signal.

The user may remotely control the heating operation, the cooling operation, and the hot water supply operation by selecting each of the heating operation, the cooling operation, and the hot water supply operation on the mode display unit 502 to implement the heating operation mode, the cooling operation mode, and the hot water supply operation mode. In addition, when hot water supply operation and cooling operation are selected together, hot water supply operation and heating operation are selected together, or hot water supply operation and cooling operation are selected together, the terminal 4 generates two operation selection signals, namely, a heating operation selection signal and a cooling operation. A selection signal, or a heating operation selection signal and a hot water supply operation selection signal, or a hot water supply operation selection signal and a cooling operation selection signal are transmitted together to the server unit 3, and the server unit 3 hosts the received two operation selection signals. transmitted to the unit 2 , and the host unit 2 may control the heat pump unit 1 according to the received two operation selection signals.

So far, the present invention has been focused on preferred embodiments. Those of ordinary skill in the art to which the present invention pertains will understand that the present invention can be implemented in modified forms without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive point of view. The scope of the present invention is indicated in the claims rather than the foregoing description, and all differences within the scope equivalent thereto should be construed as being included in the present invention.

1: Heat pump unit 2: Host unit
3: Server Unit 11: Heat Pump
12: first control unit 13: second control unit
14: control unit 111: compressor
121: first heat exchanger 122: second heat exchanger
123: third heat exchanger 124: fourth heat exchanger
131: first storage tank 132: second storage tank
133: fan coil unit 141: first expansion valve
142: second expansion valve 151: first circulation pump
152: second circulation pump 153: third circulation pump
154: fourth circulation pump 155: fifth circulation pump
181-188: 1st - 8th Euro
191, 192: first and second circulation passages
201, 202, 203, 205: 1st, 2nd, 3rd and 4th bypass

Claims (11)

at least one heat pump unit, the heat pump unit comprising:
a compressor for compressing the first medium;
a first heat exchanger connected to the compressor and provided to exchange heat between the first medium and a second medium different from the first medium;
a second heat exchanger connected to the first heat exchanger and circulating the first medium;
a fan coil unit connected to the first heat exchanger and circulating the second medium;
a first storage tank interposed between the first heat exchanger and the fan coil unit and storing the second medium;
a third heat exchanger connected to the compressor and provided to exchange heat between the first medium and the second medium;
a second storage tank connected to the third heat exchanger and storing the second medium;
a first expansion valve interposed between the first heat exchanger and the second heat exchanger;
a switching valve for changing a circulation direction of the first medium according to an operation mode;
a first solenoid valve disposed between the switching valve and the third heat exchanger;
a second solenoid valve disposed on a path intersecting both a path through which the first medium flows from the compressor to the third heat exchanger and a path through which the first medium flows from the first heat exchanger;
a third solenoid valve disposed before the first medium flows into the third heat exchanger;
a fourth solenoid valve disposed between the first solenoid valve and the third heat exchanger on a path through which the first medium flows from the third heat exchanger to the switching valve;
a second bypass path having one end connected to the path between the compressor and the third heat exchanger and the other end connected to the path to the second heat exchanger; and
a check valve and a fifth solenoid valve disposed on the second bypass passage; includes,
A separate second medium is circulated in each of the first heat exchanger and the third heat exchanger,
The operation mode is hot water supply and heating operation mode, hot water supply operation mode, hot water supply and cooling mode, cooling operation mode, heating operation mode,
The hot water supply operation mode provides hot water supply without heating and cooling operation,
The hot water supply and heating operation mode provides hot water supply and heating together,
The hot water supply and cooling operation mode provides hot water supply and cooling together,
The heating operation mode or cooling operation mode provides heating or cooling without hot water supply,
In the case of the hot water supply operation mode, the first solenoid valve is closed and the second solenoid valve, the third solenoid valve, and the fourth solenoid valve are opened, so that the first medium flowing out through the third heat exchanger is the first bypass the heat exchanger,
In the case of the hot water supply and cooling operation mode or the hot water supply and heating operation mode, the first solenoid valve, the third solenoid valve, and the fourth solenoid valve are opened and the second solenoid valve is closed through the third heat exchanger. The first medium flowing out flows to the switching valve,
In the case of the heating operation mode or the cooling operation mode, the second solenoid valve, the third solenoid valve, and the fourth solenoid valve are closed, and the first solenoid valve is opened. According to claim 1,
The switching valve is connected to the outlet end of the compressor and controls the circulation direction of the first medium discharged from the compressor. 3. The method of claim 2,
The switching valve is a four-way valve for heating and cooling and hot water supply system. delete delete delete delete delete According to claim 1,
In the case of the hot water supply and heating operation mode, the switching valve forms a path so that the first medium flowing out of the third heat exchanger and flowing through the first solenoid valve flows into the first heat exchanger. According to claim 1,
In the case of the hot water supply and cooling operation mode, the switching valve forms a path so that the first medium flowing out of the third heat exchanger and flowing through the first solenoid valve flows into the second heat exchanger. delete

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