KR20230065851A - Bidirectional heat supply system - Google Patents

Abstract

The purpose of the present invention is to increase the efficiency of heat use by providing surplus heat generated from district heating and cooling as a prosumer. In embodiments, disclosed is a bidirectional heat transfer system comprising: heating pipes that supply heat sources to a plurality of houses; cooling pipes that supply cold heat to the plurality of houses; and a heating and cooling control device disposed in each of the plurality of houses and connected to the heating pipes and the cooling pipes, wherein the heating and cooling control device includes a first heat exchanger connected to the heating pipes, a second heat exchanger connected to the cooling pipes, a heat pump disposed in the houses, and a control unit that performs control to operate in a heat consumer mode of receiving heat from the heating pipes or a heat prosumer mode of transferring surplus heat generated by the heat pump to the heating pipes.

Description

Bidirectional heat supply system}

The embodiment relates to a bi-directional heat transfer system.

District heating is energy saving and environmental pollution improvement by supplying heat economically produced from large-scale heat source facilities to the entire region through buried heat pipes without installing individual heating facilities in various buildings such as apartments, houses, shopping malls, and offices. It is an efficient heating method that contributes to

Currently, district heating supplies heating and domestic hot water to each household after heat exchange in the machine room of the multi-unit housing with hot water sent by the integrated energy provider.

However, in recent years, the trend of district heating is changing as a way to reduce heat consumption by increasing the insulation efficiency of buildings, reduce heat loss by lowering the supply temperature, and mainly utilize new and renewable energy and unused energy.

In line with this trend, technology development is progressing in the direction of reducing the temperature of heat produced by central heat sources such as cogeneration and boilers and supplied to users to a lower temperature than before or to the level of heat production temperature of new and renewable energy sources. Technology development is progressing in the direction of increasing the efficiency of district heating, such as the method of supplying or using heat, two-way heat exchange between supply and user, and reduction of surplus heat through prediction of heat usage.

An object of the embodiment is to increase heat use efficiency by providing surplus heat generated in district heating and cooling as a prosumer.

The problem to be solved by the present invention is not limited to the above-mentioned problems, and other problems not mentioned herein will be clearly understood by those skilled in the art from the following description.

A bidirectional heat transfer system according to one feature of the present invention includes a heating pipe supplying a heat source to a plurality of houses; cooling pipes supplying cold heat to the plurality of houses; and an air conditioning/heating control device disposed in each of the plurality of houses and connected to the heating pipe and the cooling pipe, wherein the air conditioning/heating control device includes: a first heat exchanger connected to the heating pipe; a second heat exchanger connected to the cooling pipe; a heat pump disposed in the house; and a control unit for controlling operation in a heat consumer mode receiving heat from the heating pipe or a heat prosumer mode transferring surplus heat generated by the heat pump to the heating pipe.

The first heat exchanger includes a 1-1 heat exchanger and a 1-2 heat exchanger, and the air conditioning/heating controller includes a first heating supply pipe and a first heating recovery pipe connecting the 1-1 heat exchanger and the heating pipe. , and a second heating supply pipe and a second heating recovery pipe connecting the first-second heat exchanger and the heating pipe.

The air-conditioning controller includes a third heating supply pipe and a third heat recovery pipe connecting the 1-1 heat exchanger and the heating load of the house, and a first heating pump connecting the third heat recovery pipe and the heat pump. A pipe, a second heat pump pipe connecting the heat pump and the 1-2 heat exchanger, a third heat pump pipe connecting the 1-2 heat exchanger and the third heat recovery pipe, and the third heat recovery pipe and a first valve and a pump disposed between the first heating pump pipe.

When operating in the heat consumer mode, the control unit drives the pump to receive a heat source from the main supply pipe of the heating pipe through the 1-1 heat exchanger and transfer the heat source to the heating load of the house, and the third heating recovery The first valve may be controlled to block a connection between the pipe and the first pump pipe.

When operating in the heat prosumer mode, the controller receives a low-temperature heat source from the main recovery pipe of the heating pipe through the 1-2 heat exchangers, and flows the low-temperature heat source into the heat pump to convert the low-temperature heat source into a high-temperature heat source. conversion, and the high-temperature heat source may be transferred to the main supply pipe of the heating pipe through the first-second heat exchanger.

The first heating supply pipe and the second heating supply pipe may be connected to each other, and the first heating recovery pipe and the second heating recovery pipe may be connected to each other.

The air conditioning and heating controller includes a first heating supply pipe and a first heating recovery pipe connecting the first heat exchanger and the heating pipe, and a third heating supply pipe and a third heating supply pipe connecting the first heat exchanger and the heating load of the house. A heating recovery pipe, a fifth heating pump pipe connecting the third heating supply pipe and the heat pump and a sixth heating pump pipe, and a seventh heating pump pipe connecting the fifth heating pump pipe and the third heating recovery pipe. , A first flow control valve disposed in the fifth heating pump pipe, and a second flow control valve disposed in the seventh heating pump pipe.

a 4-1 valve disposed in the first heating supply pipe; a 4-2 valve disposed in the first heating recovery pipe; a 4-3 valve disposed in the third heating supply pipe; and a first heating connection pipe and a second heating connection pipe disposed between the first heating supply pipe and the first heating recovery pipe.

When operating in the heat prosumer mode, the control unit transfers the surplus heat generated by the heat pump to the heating load of the house and the main supply pipe of the heating pipe. The first flow control valve and the second flow control valve can be adjusted.

According to the embodiment, heat use efficiency may be increased by providing surplus heat generated in district heating and cooling as a prosumer.

Various advantageous advantages and effects of the present invention are not limited to the above description, and will be more easily understood in the process of describing specific embodiments of the present invention.

1 is a conceptual diagram of a bidirectional heat transfer system according to an embodiment of the present invention.
2 is a conceptual diagram of a bi-directional heat transfer system according to a first embodiment of the present invention.
3A is a diagram showing a flow of heat when operating in a heat consumer mode.
3B is a diagram showing a flow of heat when operating in a thermal prosumer mode.
4 is a conceptual diagram of a bi-directional heat transfer system according to a second embodiment of the present invention.
5A is a diagram illustrating a flow of heat when operating in a heat consumer mode.
5B is a diagram showing the flow of heat when operating in a heat pump cooling/heating mode.
5C is a diagram showing a flow of heat when operating in a thermal prosumer mode.
6 is a conceptual diagram of a bi-directional heat transfer system according to a third embodiment of the present invention.
7A is a diagram illustrating a flow of heat when operating in a heat consumer mode.
7B is a diagram showing the flow of heat when operating in a heat pump cooling/heating mode.
7C is a diagram showing a flow of heat when operating in a thermal prosumer mode.
8 is a conceptual diagram of a bidirectional heat transfer system according to a fourth embodiment of the present invention.
9A is a diagram illustrating a flow of heat when operating in a heat consumer mode.
9B is a diagram showing a flow of heat when operating in a thermal prosumer mode.
10 is a conceptual diagram of a bidirectional heat transfer system according to a fifth embodiment of the present invention.
11A is a diagram showing a flow of heat when operating in a heat consumer mode.
11B is a diagram showing the flow of heat when operating in a heat pump cooling/heating mode.
11C is a diagram showing a flow of heat when operating in a thermal prosumer mode.
12 is a conceptual diagram of a bi-directional heat transfer system according to a sixth embodiment of the present invention.
13A is a diagram illustrating a flow of heat when operating in a heat consumer mode.
13B is a diagram showing the flow of heat when operating in a heat pump cooling/heating mode.
13C is a diagram showing a flow of heat when operating in a thermal prosumer mode.
14 is a conceptual diagram of a bi-directional heat transfer system according to a seventh embodiment of the present invention.
15A is a diagram showing a flow of heat when operating in a heat consumer mode.
15B is a diagram showing a flow of heat when the heat pump operates in a cooling/heating mode.
15C is a diagram showing a flow of heat when operating in a thermal prosumer mode.

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

However, the technical idea of the present invention is not limited to some of the described embodiments, but may be implemented in a variety of different forms, and if it is within the scope of the technical idea of the present invention, one or more of the components among the embodiments can be selectively implemented. can be used by combining and substituting.

In addition, terms (including technical and scientific terms) used in the embodiments of the present invention, unless explicitly specifically defined and described, can be generally understood by those of ordinary skill in the art to which the present invention belongs. It can be interpreted as meaning, and commonly used terms, such as terms defined in a dictionary, can be interpreted in consideration of contextual meanings of related technologies.

Also, terms used in the embodiments of the present invention are for describing the embodiments and are not intended to limit the present invention.

In this specification, the singular form may also include the plural form unless otherwise specified in the phrase, and when described as “at least one (or more than one) of A and (and) B and C”, A, B, and C are combined. may include one or more of all possible combinations.

Also, terms such as first, second, A, B, (a), and (b) may be used to describe components of an embodiment of the present invention.

These terms are only used to distinguish the component from other components, and the term is not limited to the nature, order, or order of the corresponding component.

In addition, when a component is described as being 'connected', 'coupled' or 'connected' to another component, the component is not only directly connected to, combined with, or connected to the other component, but also with the component. It may also include the case of being 'connected', 'combined', or 'connected' due to another component between the other components.

In addition, when it is described as being formed or disposed on “above (above) or below (below)” of each component, “upper (above)” or “lower (below)” is not only a case where two components are in direct contact with each other, but also one A case in which another component above is formed or disposed between two components is also included. In addition, when expressed as “up (up) or down (down)”, it may include the meaning of not only the upward direction but also the downward direction based on one component.

Hereinafter, the embodiment will be described in detail with reference to the accompanying drawings, but the same or corresponding components regardless of reference numerals are given the same reference numerals, and overlapping descriptions thereof will be omitted.

1 is a conceptual diagram of a bidirectional heat transfer system according to an embodiment of the present invention.

Referring to FIG. 1 , the bi-directional heat transfer system according to an embodiment of the present invention includes a heating pipe 10 supplying a heat source to a plurality of houses 30 and a cooling pipe 20 supplying cold heat to a plurality of houses 30. , and a cooling/heating control device 100 disposed in each of the plurality of houses 30 and connected to the heating pipe 10 and the cooling pipe 20.

A plurality of houses 30 are provided to control the entire system, and a heat pump 110 may be provided therein to independently perform heating and cooling.

In the present invention, the inside of the plurality of houses 30 is configured to receive a heat source from the heating pipe 10 and the cooling pipe 20 to perform cooling and heating, and the heat source according to the condition of the heat source or the house 30 It can operate as a heat consumer that uses or a heat prosumer that supplies a heat source.

The heat pump 110 provided in the house 30 may produce hot water required for heating or domestic hot water supply, or produce cold water required for cooling and supply it to the house 30 . For example, electrical energy may be produced through the solar panel 200 disposed in the house 30, and hot and cold heat may be produced by the heat pump 110 using the electrical energy.

The heating pipe 10 and the cooling pipe 20 may supply or recover heat sources to the house 30 . The heat source may be a concept including hot heat and cold heat. The heating pipe 10 has a structure in which a main supply pipe 11 capable of supplying a heat source and a main recovery pipe 12 are connected, and the cooling pipe 20 is connected to the house 30 to supply or recover a heat source. The main supply pipe 21 and the main recovery pipe 22 may be connected.

The heating pipe 10 and the cooling pipe 20 can supply cold and hot water at a low temperature. For example, the heating pipe 10 may supply hot water of 40°C to 60°C, and the cooling pipe may supply cold water of 5°C to 15°C.

2 is a conceptual diagram of a bi-directional heat transfer system according to a first embodiment of the present invention. 3A is a diagram showing a flow of heat when operating in a heat consumer mode. 3B is a diagram showing a flow of heat when operating in a thermal prosumer mode.

Referring to FIG. 2 , in the bi-directional heat transfer system according to the embodiment, first heat exchangers 141 and 142 connected to the heating pipe 10 and second heat exchangers 143 and 144 connected to the cooling pipe 20 , The heat pump 110 disposed in the house 30, and the heat consumer mode receiving heat from the heating pipe 10 and the cooling pipe 20, and the surplus heat generated by the heat pump 110 to the heating pipe 10 ) or a control unit 300 that determines whether to operate in a heat prosumer mode that transfers heat to the cooling pipe 20. The controller 300 may individually control the plurality of houses 30 or may control the plurality of houses 30 in an integrated manner.

The first heat exchangers 141 and 142 of the bidirectional heat transfer system according to the embodiment may include a 1-1 heat exchanger 141 and a 1-2 heat exchanger 142 . In addition, the first heating supply pipe 121 and the first heating recovery pipe 122 connecting the 1-1 heat exchanger 141 and the heating pipe 10, and the 1-2 heat exchanger 142 and the heating A second heating supply pipe 125 and a second heating recovery pipe 126 connecting the pipe 10 may be included. The heating supply pipe and the heating return pipe are configurations for identification only and do not limit their role. Illustratively, heat may be supplied or recovered through a heating supply pipe. For example, the first heating supply pipe may be described as a 1-1 heating pipe, and the first heating recovery pipe may be described as a 1-2 heating pipe.

The 1-1 heat exchanger 141 may be a heat exchanger for consumption to receive heat from the heating pipe 10, and the 1-2 heat exchanger 142 is for sale to provide heat to the heating pipe 10. It may be a heat exchanger. According to the embodiment, heat exchange can be optimized by connecting the two heat exchangers to the heating pipe 10, respectively.

In addition, the air-conditioning device 100 includes a third heating supply pipe 123 and a third heating recovery pipe 124 connecting the 1-1 heat exchanger 141 and the heating load 31 of the house 30, 3 The first heating pump pipe 127a connecting the heat recovery pipe 124 and the heat pump 110, and the second heating pump pipe 127b connecting the heat pump 110 and the 1-2 heat exchangers 142 ), the third heating pump pipe 127c connecting the 1-2 heat exchanger 142 and the third heating supply pipe 123, and the third heating recovery pipe 124 and the first heating pump pipe 127a It may include a 1-1 valve 151 and a pump P1 disposed therebetween.

Various types of heating loads 31 may be disposed in the house 30 . The heating load 31 may be a load that consumes heat within the house 30 . The heating load 31 may be connected to the 1-1 heat exchanger 141 through the third heating supply pipe 123 and the third heating recovery pipe 124 .

The second heat exchangers 143 and 144 may include a 2-1 heat exchanger 144 and a 2-2 heat exchanger 143 . In addition, the first cooling supply pipe 131 and the first cooling recovery pipe 132 connecting the 2-1 heat exchanger 144 and the cooling pipe 20, and the 2-2 heat exchanger 143 and the cooling A second cooling supply pipe 135 and a second cooling return pipe 136 connecting the pipe 20 may be included.

The 2-1 heat exchanger 144 may be a consumption heat exchanger for receiving cold heat from the cooling pipe 20, and the 2-2 heat exchanger 143 is for sale to provide cold heat to the cooling pipe 20. It may be a heat exchanger. According to the embodiment, since the two heat exchangers are connected to the cooling pipe 20 respectively, stability can be improved and heat exchange can be optimized.

In addition, the air conditioning unit includes a third cooling supply pipe 133 connecting the 2-1 heat exchanger 144 and the cooling load 32 of the house 30, a third cooling recovery pipe 134, and a third cooling recovery pipe. The first cooling pump pipe 137a connecting the pipe 134 and the heat pump 110, the second cooling pump pipe 137b connecting the heat pump 110 and the 2-2 heat exchanger 143, 2-2 Arranged between the third cooling pump pipe 137c connecting the heat exchanger 143 and the third cooling supply pipe 133 and the third cooling return pipe 134 and the first cooling pump pipe 137a It may include a 1-2 valve 152 and a pump (P2).

Various types of cooling loads 32 may be disposed in the house 30 . The cooling load 32 may be a load that consumes cooling heat within the house 30 . The cooling load 32 may be connected to the 2-1 heat exchanger 144 through the third cooling supply pipe 133 and the third cooling recovery pipe 134.

Referring to FIG. 3A , when the house 30 operates in the heat consumer mode, the control unit 300 receives heat (eg, from the main supply pipe 11 of the heating pipe 10 through the 1-1 heat exchanger 141). : 55 ° C.) can be received and the pump (P1) can be driven to transfer it to the heating load (31) of the house (30).

At this time, the 1-1 valve 151 may be controlled to block the connection between the third heating recovery pipe 124 and the first heating pump pipe 127a. The 1-1 valve 151 may be a three-way valve having three sub-valves, and a sub-valve connected to the first heating pump pipe 127a may be blocked. In the drawing, a white triangle may be an open subvalve, and a black triangle may be a closed subvalve. Accordingly, heat may be transmitted from the main supply pipe 11 of the heating pipe 10 to the heating load 31 through the first heating supply pipe 121 and the third heating supply pipe 123 . Thereafter, the heat source (eg, 45° C.) that supplied heat to the heating load 31 passes through the third heating recovery pipe 124 and the first heating recovery pipe 122 to the main recovery pipe 12 of the heating pipe 10. can be recovered as The flow of heat is indicated by a thick solid line.

The cold heat consumer mode may operate in the same way as the warm heat consumer mode. The control unit 300 receives cold heat (eg, 5° C.) from the main supply pipe 21 of the cooling pipe 20 through the 2-1 heat exchanger 144 and transfers it to the cooling load 32 of the house 30 It is possible to drive the pump (P2) to do so.

At this time, the 1-2 valve 152 may be controlled to block the connection between the third cooling recovery pipe 134 and the first cooling pump pipe 137a. Therefore, cooling heat can be transferred from the main supply pipe 21 of the cooling pipe 20 to the cooling load 32 through the first cooling supply pipe 131 and the third cooling supply pipe 133. Thereafter, the heat source (eg, 12.5° C.) that supplied cooling heat to the cooling load 32 passes through the third cooling recovery pipe 134 and the first cooling recovery pipe 132 to the main return pipe 22 of the cooling pipe 20. can be recovered as Since the heating load side and the cooling load side have a symmetrical structure with the heat pump 100 interposed therebetween, they can have the same heat transfer flow.

Referring to FIG. 3B , when operating in the heat prosumer mode, the control unit 300 sends a low-temperature heat source (eg, 45 ℃) is introduced into the heat pump 110, converted into a high-temperature heat source (eg, 55 ° C), and transmitted to the main supply pipe 11 of the heating pipe 10 through the 1-2 heat exchanger 142 again. there is.

Specifically, the low-temperature heat source introduced through the second heating supply pipe 125 is transferred to the third heating pump pipe 127c, via the heating load 31, and the heat pump through the first heating pump pipe 127a. In the process of passing through the condenser 111 of (110), it can be converted into a high-temperature heat source. The high-temperature heat source may be transferred to the main supply pipe 11 of the heating pipe 10 through the first and second heat exchangers 142 . At this time, the 1-1 valve 151 blocks the sub-valve in the direction of the 1-1 heat exchanger 141 and connects the third heating recovery pipe 124 and the first heating pump pipe 127a.

Similarly, the high-temperature heat source (eg, 12.5 ° C) of the cooling pipe introduced through the second cooling supply pipe 135 is transferred to the third cooling pump pipe 137c and passes through the cooling load 32 to the first cooling pipe. In the process of passing through the evaporator 112 of the heat pump 110 through the cooling pump pipe 137a, it can be converted into a low-temperature heat source (eg, 5°C). The low-temperature heat source (cold heat) may be transferred to the main supply pipe 21 of the cooling pipe 20 through the 2-2 heat exchanger 143 . At this time, the sub-valve in the direction of the 2-2 heat exchanger 144 of the 1-2 valve 152 is blocked to connect the third cooling return pipe 134 and the first cooling pump pipe 137a. Since the heating load side and the cooling load side have a symmetrical structure with the heat pump 100 interposed therebetween, they can have the same heat transfer flow.

4 is a conceptual diagram of a bi-directional heat transfer system according to a second embodiment of the present invention. 5A is a diagram illustrating a flow of heat when operating in a heat consumer mode. 5B is a diagram showing the flow of heat when operating in a heat pump cooling/heating mode. 5C is a diagram showing a flow of heat when operating in a thermal prosumer mode.

Referring to FIG. 4, the bidirectional heat transfer system according to the embodiment includes a first heating supply pipe 121 and a first heating recovery pipe 122 connecting the 1-1 heat exchanger 141 and the heating pipe 10, and a second heating supply pipe 125 and a second heating recovery pipe 126 connecting the 1-2 heat exchanger 142 and the heating pipe 10, the same as those of the first embodiment. However, there is a difference in that the second heating supply pipe 125 is connected to the first heating recovery pipe 122 and the second heating recovery pipe 126 is connected to the first heating supply pipe 121.

In addition, the 2-1 valve 151a may be disposed in the third heating recovery pipe 124, and the 2-2 valve 151b may be disposed in the second heating recovery pipe 126. Similarly, on the cold heat side, the 2-3 valve 152a is disposed on the third cooling recovery pipe 134 and the 2-4 valve 152b is disposed on the second cooling recovery pipe 136.

Referring to FIG. 5A, when operating in the heat consumer mode, the control unit receives the heat source from the main supply pipe 11 of the heating pipe 10 through the 1-1 heat exchanger 141 to load the heating load of the house 30 ( 31) to drive the pump.

At this time, the 2-1 valve 151a may be controlled to block the connection between the third heating recovery pipe 124 and the first heating pump pipe 127a. The 2-1 valve 151a may be a three-way valve, and a sub-valve connected to the first heating pump pipe 127a may be blocked. Accordingly, heat may be transferred to the heating load 31 through the first heating supply pipe 121 and the third heating supply pipe 123 through the main supply pipe 11 of the heating pipe 10 . Thereafter, the heat source supplying heat to the heating load 31 may be returned to the main recovery pipe 12 of the heating pipe 10 through the third heating recovery pipe 124 and the first heating recovery pipe 122 . The cold heat consumer mode may also operate in the same way as the warm heat consumer mode.

Referring to FIG. 5B , the house 30 may operate in a heat pump cooling/heating mode. The heat pump cooling/heating mode may be a mode in which hot or cold heat produced by the heat pump 110 is used for the load of the house 30 .

Specifically, the 2-1 valve 151a may block the sub-valve in the direction of the 1-1 heat exchanger 141, and the 2-2 valve 151b may be blocked. Therefore, the flow of the heat source is transferred from the heat pump 110 to the heating load 31 via the second heating pump pipe 127b and the third heating pump pipe 127c, and the heat exchanged heat source is transferred to the third heating recovery pipe 124 ) and can move to the heat pump 110 again through the first heating pump pipe 127a. The cold heat mode may also operate in the same way.

Referring to FIG. 5C , when operating in the thermal prosumer mode, a low-temperature heat source is received from the main recovery pipe 12 of the heating pipe 10 through the first-second heat exchanger 142, and the low-temperature heat source is removed. 1 It is introduced into the heat pump 110 through the heating pump pipe 127a and converted into a high-temperature heat source, and the high-temperature heat source is converted into a high-temperature heat source through the 1st-2nd heat exchanger 142 through the main supply pipe 11 of the heating pipe 10 can be forwarded to

Specifically, the low-temperature heat source of the heating pipe introduced through the first heating recovery pipe 122 and the second heating supply pipe 125 is transferred to the third heating pump pipe 127c through the 1-2 heat exchanger 142. In the process of passing through the condenser 111 of the heat pump 110 through the first heating pump pipe 127a via the cooling load 32, it can be converted into a high-temperature heat source. The high-temperature heat source may be transferred to the main supply pipe 11 of the heating pipe 10 through the first and second heat exchangers 142 . At this time, the sub-valve in the direction of the 1-1 heat exchanger 141 of the 2-1 valve 151a is blocked so that the third heating recovery pipe 124 and the first heating pump pipe 127a can communicate with each other. Also, the 2-2 valve 151b may be opened. The cold heat prosumer mode may also operate in the same way.

6 is a conceptual diagram of a bi-directional heat transfer system according to a third embodiment of the present invention. 7A is a diagram illustrating a flow of heat when operating in a heat consumer mode. 7B is a diagram showing the flow of heat when operating in a heat pump cooling/heating mode. 7C is a diagram showing a flow of heat when operating in a thermal prosumer mode.

Referring to FIG. 6, the third heating supply pipe 123 disposed between the heating load and the 1-2 heat exchangers 142 is omitted, and the heating load 31 and the heat pump 110 are connected to the fourth heating pump pipe. (127d) can be directly connected. In addition, the third cooling supply pipe 133 disposed between the cooling load 32 and the 2-2 heat exchanger 143 is omitted, and the cooling load 32 and the heat pump 110 are connected to the fourth cooling pump pipe ( 137d) can be directly connected.

Referring to FIG. 7A, in the heating heat consumer mode, the heat source of the main supply pipe 11 of the heating pipe 10 moves to the first heating supply pipe 121 and passes through the 1-1 heat exchanger 141 to provide third heating. Heat can be exchanged with the pump pipe (127c). The supplied heat source may be supplied to the heating load 31 through the second heating pump pipe 127b, the heat pump 110, and the fourth heating pump pipe 127d. Thereafter, the heat source may move to the main recovery pipe 12 of the heating pipe 10 through the third heating recovery pipe 124 and the first heating recovery pipe 122 . The cold-heat consumer mode can also be heat-exchanged in the same sequence.

Referring to FIG. 7B , when operating in the heat pump cooling/heating mode, heat generated by the heat pump 110 may be transferred to a heating load through the fourth heating pump pipe 127d. Thereafter, the heat may be returned to the heat pump 110 through the third heat recovery pipe 124, the third heat pump pipe 127c, and the second heat pump pipe 127b. At this time, both the 3-1 valve 151c and the 3-2 valve 151b may be blocked.

Referring to FIG. 7C , when operating in the heat prosumer mode, the heat source of the main recovery pipe 12 of the heating pipe 10 passes through the first-second heat exchanger 142 and heats the second heating pump pipe 127b. The heat source introduced into the pump 110 and heated is the main supply pipe of the heating pipe 10 through the fourth heating pump pipe 127d, the third heating recovery pipe 124, and the third heating pump pipe 127c. (11) can be passed. At this time, the 3-1 valve 151c may be blocked and the 3-2 valve 151b may be opened.

8 is a conceptual diagram of a bidirectional heat transfer system according to a fourth embodiment of the present invention. 9A is a diagram illustrating a flow of heat when operating in a heat consumer mode. 9B is a diagram showing a flow of heat when operating in a thermal prosumer mode.

Referring to FIG. 8 , the bidirectional heat transfer system according to the embodiment includes a first heating supply pipe 121 and a first heating recovery pipe 122 connecting the first heat exchanger 141 and the heating pipe 10, 1 The third heating supply pipe 123 and the third heating recovery pipe 124 connecting the heat exchanger 141 and the heating load 31 of the house 30, the third heating supply pipe 123 and the heat pump ( 110) connecting the fifth heating pump pipe 128a and the sixth heat pump pipe 128c, and connecting the fifth heating pump pipe 128a and the third heating recovery pipe 124 to the seventh heating pump pipe 128b ), a first heating flow control valve 161a disposed on the fifth heating pump pipe 128a, and a second heating flow control valve 161b disposed on the seventh heating pump pipe 128b.

A 4-1 valve 151e is disposed in the first heating supply pipe 121, a 4-2 valve 151d is disposed in the first heating recovery pipe 122, and a third heating supply pipe 123 The 4-3 valve (151f) may be disposed. In addition, a first heating connection pipe 123a and a second heating connection pipe 123b may be disposed between the first heating supply pipe 121 and the first heating recovery pipe 122 .

In addition, on the cooling and heat side, the first cooling supply pipe 131 and the first cooling recovery pipe 132 connecting the second heat exchanger 144 and the cooling pipe 20, the second heat exchanger 144 and the housing 30 The third cooling supply pipe 133 and the third cooling return pipe 134 connecting the cooling load 32, and the fifth cooling pump pipe 138a connecting the third cooling supply pipe 133 and the heat pump 110 ) and the 6th cooling pump pipe 138c, the 7th cooling pump pipe 138b connecting the 5th cooling pump pipe 138a and the 3rd cooling return pipe 134, and the 5th cooling pump pipe 138a. a first cooling flow control valve 162a, and a second cooling flow control valve 162b disposed on the seventh cooling pump pipe 138b.

A 4-4 valve 152e is disposed in the first cooling supply pipe 131, a 4-5 valve 152d is disposed in the first cooling return pipe 132, and a third cooling supply pipe 133 The fourth to sixth valves 152f may be disposed. In addition, a first cooling connection pipe 133a and a second cooling connection pipe 133b may be disposed between the first cooling supply pipe 131 and the first cooling return pipe 132 .

Referring to FIG. 9A, when operating in the heating heat consumer mode, the heat source of the main supply pipe 11 of the heating pipe 10 is transferred to the heating load through the first heat exchanger 141 and the third heating supply pipe 123. It can be. Thereafter, the heat may be returned to the main recovery pipe 12 of the heating pipe 10 through the third heating recovery pipe 124 and the first heating recovery pipe 122 . In the cooling heat consumer mode, cooling heat may also be supplied in the same way.

Referring to FIG. 9B , when operating in the heating heat prosumer mode, the heat of the main recovery pipe 12 of the heating pipe 10 is supplied to the first heating recovery pipe 122, the first heating connection pipe 123a, and the first heat supply. Heat may be introduced into the heat pump 110 through the pipe 121 and the sixth heating pump pipe 128c. Thereafter, the main recovery pipe 12 of the heating pipe 10 passes through the fifth heating pump pipe 128a, the third heating recovery pipe 124, the second heating connection pipe 123b, and the first heating supply pipe 121. ) can be transmitted.

At this time, some of the surplus heat transferred to the fifth heating pump pipe 128a may be selectively supplied to the heating load 31 by the first heating flow control valve 161a and the second heating flow control valve 161b. . That is, some may be supplied to the heating load 31 and only the rest may be sold. If it is not necessary to supply the heating load 31, all of the surplus heat may be supplied to the heating pipe 10 through the second heating flow control valve 161b by blocking the first heating flow control valve 161a.

When operating in the cooling heat consumer mode, heat from the main return pipe 22 of the cooling pipe 20 is transferred to the first cooling recovery pipe 132, the first cooling connection pipe 133a, the first cooling supply pipe 131, 6 It can be introduced into the heat pump 110 through the cooling pump pipe 138c and cooled. Thereafter, the main return pipe 22 of the cooling pipe 20 passes through the fifth cooling pump pipe 138a, the third cooling return pipe 134, the second cooling connection pipe 133b, and the first cooling supply pipe 131. ) can be transmitted.

At this time, some of the surplus heat transferred to the fifth cooling pump pipe 138a may be selectively supplied to the cooling load 32 by the first cooling flow control valve 162a and the second cooling flow control valve 162b. . That is, some may be supplied to the cooling load 32 and only the rest may be sold. If there is no need to supply cooling heat to the cooling load 32, the first cooling flow control valve 162a is shut off so that all of the surplus heat can be supplied to the cooling pipe 20 through the second cooling flow control valve 162b. .

10 is a conceptual diagram of a bidirectional heat transfer system according to a fifth embodiment of the present invention. 11A is a diagram showing a flow of heat when operating in a heat consumer mode. 11B is a diagram showing the flow of heat when operating in a heat pump cooling/heating mode. 11C is a diagram showing a flow of heat when operating in a thermal prosumer mode.

Referring to FIG. 10 , the bidirectional heat transfer system according to the embodiment is characterized in that the third heating supply pipe 123 is omitted and the first heat exchangers 141 and 142 and the heat pump 110 are connected. Also, the flow control valve has been omitted.

Referring to FIG. 11A, when operating in the heat consumer mode, the heat source of the main supply pipe 11 of the heating pipe 10 is the first heating supply pipe 121, the eighth heat pump pipe 128e, and the ninth heat pump pipe. It can be transmitted to the heating load 31 through (128d). Thereafter, the heat may be returned to the main recovery pipe 12 of the heating pipe 10 through the third heating recovery pipe 124 and the first heating recovery pipe 122 . Cooling heat can also be supplied in the same manner in the cooling/heating consumer mode.

Referring to FIG. 11B , when operating in the heat pump cooling/heating mode, surplus heat generated by the heat pump 110 may be transferred to the heating load 31 through the ninth heating pump pipe 128d. Thereafter, the heat may be recovered to the heat pump 110 through the third heat recovery pipe 124 and the eighth heat pump pipe 128e. The 5-1 valve 151e may block the sub-valve in the direction of the first heat exchanger 141, and the 5-2 valve 151d may also block the sub-valve in the direction of the first heat exchanger 141.

Referring to FIG. 11C , when operating in the heating heat consumer mode, the heat of the main recovery pipe 12 of the heating pipe 10 is transferred to the first heating recovery pipe 122, the first heating connection pipe 123a, and the first heat supply. Heat may be introduced into the heat pump 110 through the pipe 121 and the eighth heating pump pipe 128e and heated. Thereafter, the main recovery pipe of the heating pipe 10 ( 12) can be passed on. A check valve 161c is disposed in the second heating connection pipe 123b to communicate with the first heating connection pipe 123a to prevent reverse flow.

When operating in the cooling heat consumer mode, heat from the main return pipe 22 of the cooling pipe 20 is transferred to the first cooling recovery pipe 132, the first cooling connection pipe 133a, the first cooling supply pipe 131, 8 It can be introduced into the heat pump 110 through the cooling pump pipe 138e and heated. Thereafter, the main return pipe (of the cooling pipe 20) passes through the ninth cooling pump pipe 138d, the third cooling return pipe 134, the second cooling connection pipe 133b, and the first cooling supply pipe 131. 22) can be passed on. A check valve 162c is disposed in the second cooling connection pipe 133b to communicate with the first cooling connection pipe 133a to prevent reverse flow.

12 is a conceptual diagram of a bi-directional heat transfer system according to a sixth embodiment of the present invention. 13A is a diagram illustrating a flow of heat when operating in a heat consumer mode. 13B is a diagram showing the flow of heat when operating in a heat pump cooling/heating mode. 13C is a diagram showing a flow of heat when operating in a thermal prosumer mode.

Referring to FIG. 12 , the bidirectional heat transfer system according to the embodiment may be connected only with pipes without a heat exchanger.

Referring to FIG. 13A , when operating in the heating heat consumer mode, a heat source from the main supply pipe 11 of the heating pipe 10 may be applied to the heating load 31 through the first heating supply pipe 121 . Thereafter, it may be returned to the main recovery pipe 12 of the heating pipe 10 through the first heating recovery pipe 122 . At this time, the 6-1 valve 151f may be open, the 6-2 valve 151h may be blocked, and the 6-3 valve 151g may be open.

Referring to FIG. 13B, the surplus heat is heated by using the 10th heating pump pipe 128g connected to the first heating supply pipe 121 and the 11th heat pump pipe 128f connected to the first heating recovery pipe 122. It can be supplied to the load (31). In detail, surplus heat generated by the heat pump 110 may be transferred to the heating load 31 through the tenth heating pump pipe 128g. Then, it can be recovered through the first heat recovery pipe 122 and the eleventh heat pump pipe 128f. At this time, the 6-1 valve 151f and the 6-2 valve 151h may be opened and the 6-3 valve 151g may be closed.

Referring to FIG. 13C , when operating in the heat prosumer mode, heat from the main recovery pipe 12 of the heating pipe 10 flows into the heat pump 110 through the eleventh pump pipe 128f and can be heated. Then, it can be delivered to the main supply pipe 11 of the heating pipe 10 through the tenth heating pump pipe 128g. At this time, the 6-1 valve 151f is closed, and the 6-2 valve 151h and the 6-3 valve 151g may be opened.

14 is a conceptual diagram of a bi-directional heat transfer system according to a seventh embodiment of the present invention. 15A is a diagram showing a flow of heat when operating in a heat consumer mode. 15B is a diagram showing the flow of heat when the heat pump operates in a cooling/heating mode. 15C is a diagram showing a flow of heat when operating in a thermal prosumer mode.

Referring to FIG. 14 , the bi-directional heat transfer system according to the embodiment may include only a heat exchanger for sale. Referring to FIG. 15A , in the warm consumer mode, heat from the main supply pipe 11 of the heating pipe 10 may be transferred to the heating load 31 through the first heating supply pipe 121 . The cold heat consumer mode may also proceed in the same order.

Referring to FIG. 15B, when operating in the heat pump cooling/heating mode, the surplus heat of the heat pump 110 is supplied by the twelfth heating pump pipe 129b, the thirteenth heating pump pipe 129c, and the first heating supply pipe 121. It can be transmitted to the heating load 31 through. At this time, the 7-1 valve 151i may block the sub-valve toward the heating pipe, and the 7-2 valve 151j may block.

Referring to FIG. 15C, during the heat prosumer operation, the heat of the main recovery pipe 12 of the heating pipe 10 moves to the first heating recovery pipe 122 and the second heating recovery pipe 126, and the first to second heat recovery pipe 126 It may be transferred to the thirteenth heating pump pipe 129c through the heat exchanger 142. Thereafter, the heat may be introduced into the heat pump 110 through the heating load 31 through the fourteenth heating pump pipe 129a and heated. Thereafter, the heat may be transferred to the main supply pipe 11 of the heating pipe 10 through the twelfth heat pump pipe 129b and the second heat recovery pipe 126 .

The above description is merely an example of the technical idea of the present invention, and those skilled in the art can make various modifications, changes, and substitutions without departing from the essential characteristics of the present invention. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings. . The protection scope of the present invention should be construed according to the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

Claims (9)

Heating pipes supplying heat to a plurality of houses;
cooling pipes supplying cold heat to the plurality of houses; and
An air-conditioning control device disposed in each of the plurality of houses and connected to the heating pipe and the cooling pipe,
The cooling and heating control device,
a first heat exchanger connected to the heating pipe;
a second heat exchanger connected to the cooling pipe;
a heat pump disposed in the house; and
The bi-directional heat transfer system including a control unit controlling to operate in a heat consumer mode receiving heat from the heating pipe or a heat prosumer mode transferring surplus heat generated by the heat pump to the heating pipe.
According to claim 1,
The first heat exchanger includes a 1-1 heat exchanger and a 1-2 heat exchanger,
The cooling and heating control device,
A first heating supply pipe and a first heating recovery pipe connecting the 1-1 heat exchanger and the heating pipe, and
A bi-directional heat transfer system comprising a second heating supply pipe and a second heating recovery pipe connecting the 1-2 heat exchanger and the heating pipe.
According to claim 2,
The cooling and heating control device,
A third heating supply pipe and a third heating recovery pipe connecting the 1-1 heat exchanger and the heating load of the house;
A first heating pump pipe connecting the third heating recovery pipe and the heat pump;
A second heating pump pipe connecting the heat pump and the first-second heat exchanger;
A third heating pump pipe connecting the 1-2 heat exchanger and the third heating supply pipe, and
A bidirectional heat transfer system comprising a first valve and a pump disposed between the third heating recovery pipe and the first heating pump pipe.
According to claim 3,
When operating in the thermal consumer mode,
The control unit receives the heat source from the main supply pipe of the heating pipe through the 1-1 heat exchanger and drives the pump to transfer the heat source to the heating load of the house, and connects the third heating recovery pipe and the first heating pump pipe. A bi-directional heat transfer system controlling the first valve to close the connection.
According to claim 3,
When operating in the thermal prosumer mode,
The control unit receives a low-temperature heat source from the main recovery pipe of the heating pipe through the 1-2 heat exchanger, converts the low-temperature heat source into a high-temperature heat source by introducing the low-temperature heat source into the heat pump, and converts the low-temperature heat source into a high-temperature heat source, A two-way heat transfer system for transferring the high-temperature heat source to the main supply pipe of the heating pipe through a group.
According to claim 2,
The first heating recovery pipe and the second heating supply pipe are connected to each other,
The first heating supply pipe and the second heating recovery pipe are connected to each other.
According to claim 1,
The cooling and heating control device,
A first heating supply pipe and a first heating recovery pipe connecting the first heat exchanger and the heating pipe;
A third heating supply pipe and a third heating recovery pipe connecting the first heat exchanger and the heating load of the house;
A fifth heating pump pipe and a sixth heating pump pipe connecting the third heating supply pipe and the heat pump;
A seventh heat pump pipe connecting the fifth heat pump pipe and the third heat recovery pipe;
A first flow control valve disposed in the fifth heating pump pipe, and
A two-way heat transfer system comprising a second flow control valve disposed in the seventh heating pump pipe.
According to claim 7,
a 4-1 valve disposed in the first heating supply pipe;
a 4-2 valve disposed in the first heating recovery pipe;
a 4-3 valve disposed in the third heating supply pipe; and
A bi-directional heat transfer system comprising a first heating connection pipe and a second heating connection pipe disposed between the first heating supply pipe and the first heating recovery pipe.
According to claim 8,
When operating in the thermal prosumer mode,
The control unit controls the first flow control valve and the second flow control valve to transfer the surplus heat generated by the heat pump to the heating load of the house and the main supply pipe of the heating pipe.

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