KR101416207B1 - Heat-pump system with three cycles using air and water heat - Google Patents

Abstract

A three-cycle heat pump system using air heat and water heat according to the present invention includes: a first heat exchanger (10) for discharging the heat of a first refrigerant; a first circulation unit (101) funneled with the first heat exchanger (10), and flowing the first refrigerant, while having a first compressor (110) and a first expansion valve (121); a second circulation unit (201) for transferring heat to the first circulation unit (101) using a second heat exchanger (20) as a medium, and flowing a second refrigerant, while having a second compressor (210) and a second expansion valve (221); an air heat exchanger (30) which becomes a part of the second circulation unit (201) and performs a heat exchange with air; a third circulation unit (202) for sharing a portion of the flow passage of the second circulation unit (201), and flowing the second refrigerant, while having a water heat compressor (211) and a water heat expansion valve (222); and a water heat exchanger (31) which becomes a part of the third circulation unit (202) and transfers heat to the second refrigerant.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a three-cycle heat pump system using air heat and hydrothermal heat,

More particularly, the present invention relates to a three-way cycle heat pump system that utilizes air heat and hydrothermal heat that can reduce a decrease in the production efficiency of cold and hot water depending on the temperature and humidity of the outside air.

In addition, the present invention improves the structure of a heat pump made up of a two-cycle cycle during the production or cooling of cold water and constitutes a supplementary or complementary compression cycle to effectively utilize the heat of the air and the heat, To a three-stroke cycle heat pump system using the same.

The term " cooling & heating device " refers to a device that delivers a low-temperature heat source to a high temperature through a coolant or a heat transfer member, or delivers a high-temperature heat source to a low temperature to provide an appropriate temperature at a predetermined location.

Generally, a cooling / heating apparatus using a heat pump is used in consideration of the cooling / heating efficiency and the convenience of operation. The heat pump has both a heat absorbing portion and a heat releasing portion, and absorbs heat from the evaporator and transfers it to the condenser do.

FIG. 1 shows a cooling / heating system according to the prior art, and shows the flow of refrigerant during cooling.

Referring to FIG. 1, the conventional cooling / heating system includes a compressor 2 for compressing refrigerant into a high-temperature and high-pressure state, a refrigerant compressed by the compressor 2, An expansion valve (6) for reducing the pressure of the refrigerant condensed in the outdoor heat exchanger (4) to low temperature and low pressure refrigerant, and a refrigerant decompressed in the electronic expansion valve (6) An indoor heat exchanger 8 for evaporating the refrigerant to a low-temperature and low-pressure gas state, and a valve 9 connected to the compressor 2.

The refrigerant is circulated along the compressor 2, the outdoor heat exchanger 4, the electronic expansion valve 6, the indoor heat exchanger 8, and the outdoor heat exchanger 4, And the indoor heat exchanger 8 serve as a condenser and an evaporator, respectively.

Japanese Patent Application No. 10-0897131 (hereinafter referred to as "prior art document") discloses a cooling / heating system using such a heat pump, and FIG. 2 is a diagram showing a binary cycle heat pump system of this prior art document.

In the case of the two-cycle air conditioner of the prior art, the efficiency is increased by constructing two cycles basically. Basically, in the case of heating, both the high-temperature side compressor 230 and the low-temperature side multi-stage compressor 120 operate to maximize efficiency of heat emission.

As shown in FIG. 2, it can be seen that the operation of one compressor is interrupted in the cooling mode operation.

That is, in the case of the conventional two-cycle heat pump, in the case of heating, it is possible to guarantee a certain efficiency in the process of compression and expansion for each of the two refrigerants, but in the case of production of cooling or cold water, The operation is interrupted, so that the efficiency is drastically reduced as compared with the case of heating. The efficiency of cold water production is generally about 30% of that of heating.

On the other hand, even in the case of having such a structure, there is a problem that the efficiency of heating can not be guaranteed even when the outdoor temperature is extremely low.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems described above, and it is an object of the present invention to provide a three-way cycle heat pump system using heat and heat which can be significantly improved in efficiency compared with a conventional two- The purpose is to do.

It is another object of the present invention to provide a three-way cycle heat pump system capable of maximizing efficiency as compared with a conventional two-cycle heat pump by utilizing air and hydrothermal heat for cooling and heating.

It is another object of the present invention to provide a three-way cycle heat pump system that utilizes heat and heat, which can effectively produce cold water and hot water at the same time.

A three-way cycle heat pump system using air heat and hydrothermal according to an embodiment of the present invention includes a first heat exchanger (10) for discharging heat of a first refrigerant, a second heat exchanger (10) communicating with the first heat exchanger A first circulation unit 101 having a first compressor 110 and a first expansion valve 121 through which a refrigerant flows and a second heat exchanger 20 for transferring heat to the first circulation unit 101 A second circulation unit 201 having a second compressor 210 and a second expansion valve 221 flowing through the second refrigerant, an air heat exchanger A third circulation unit 202 that shares a part of the flow path of the second circulation unit 201 and the second refrigerant flows and has a hydrothermal compressor 211 and a hydrothermal expansion valve 222, And a water heat exchanger (31) that constitutes a part of the circulation unit (202) and transfers heat to the second refrigerant. When the hot water is generated in the first heat exchanger (10), the water heat exchanger (31) And absorbs the heat of the wastewater to absorb the heat of the second refrigerant and the air compressed in the hydrothermal compressor 211 and the second refrigerant compressed in the second compressor 210 absorb the heat of the second refrigerant, And a three-way cycle heat pump system using heat and heat to transfer heat to the first refrigerant in the heat exchanger (20). Therefore, since the hot water can be produced by absorbing the heat of the air and the waste water, the efficiency of the heat pump can be assured even in a cold weather.

In addition, in the three-way cycle heat pump system using air heat and hydrothermal according to the present invention, the hydrothermal compressor 211 is an inverter compressor, and when the cold water is generated in the water heat exchanger 31, Operation may be interrupted. Therefore, the generation efficiency of the cold water can be further improved as compared with the conventional two-way cycle.

Meanwhile, a three-way cycle heat pump system using air heat and hydrothermal according to another embodiment of the present invention includes a first heat exchanger 10 communicating with a heating oil or hot water flow path, a first heat exchanger 10 communicating with the first heat exchanger 10, A first cycle 100 in which the first refrigerant flows and a second cycle 200 in which heat is transferred to the first cycle 100 through the second heat exchanger 20 and the second refrigerant flows, A third heat exchanger 40 constituting a part of the flow path of the second cycle 200 and a second heat exchanger 40 constituting a part of the flow path of the second cycle 200. The second heat exchanger 30, A third cycle 300 in which the third refrigerant flows and a third refrigerant 300 for constituting a part of the third cycle 300 and for producing cold water or recovering the waste heat, through a third heat exchanger 40, And a fourth heat exchanger (50) in which heat exchange is performed between the third heat exchanger (10) and the third heat exchanger In the cycle 300, the third refrigerant absorbing the heat of the wastewater is heated and transferred to the second cycle 200. In the second cycle 200, the heat of the outside air is absorbed from the air heat exchanger 30, A three-way cycle heat pump system that uses air and heat to generate hot water by heating the first refrigerant in the first cycle 100 and heating the hot water in the first heat exchanger 10 to provide. Therefore, the efficiency of heating can be maximized through air and waste heat.

In the three-way cycle heat pump system using air heat and hydrothermal heat, the second heat exchanger (30) and the third heat exchanger (40) can selectively flow the second refrigerant. Therefore, it is possible to operate the optimized heat pump according to the ambient temperature and humidity.

In the three-way cycle heat pump system using air and heat, the first cycle 100 includes a first compressor 110 and a first expansion valve 121, and the second cycle 200 includes a second compressor 210 and a second expansion valve 221 and the third cycle 300 includes a third compressor 310 and a third expansion valve 321, The divided flow passage 281 for communicating the second expansion valve 221 and the third heat exchanger 40 is branched from the flow path leading from the second expansion valve 221 to the air heat exchanger 30 and the third heat exchanger 40 to the second compressor 210 may be joined to the flow path leading to the air conditioner 30 and the second compressor 210. Therefore, the selection of the flow can be assured and the efficiency of the heat cycle of the refrigerant can be maximized.

The three-way cycle heat pump system using the heat and air heat of the present invention as described above is characterized in that in the production process of the cold water, the two-way cycle in the conventional case operates in a substantially single cycle whereas in the present invention, The production efficiency of the cold water can be substantially at least substantially close to the efficiency of production of the hot water, so that the efficiency of the heat pump can be maximized.

In addition, according to the concept of the present invention, when the outside temperature is extremely low, the use of external heat is blocked or the cycle of utilizing the heat of the wastewater is provided, thereby preventing deterioration of thermal efficiency and maximizing efficiency of heating or hot water generation There is an effect that can be.

In addition, by operating at least two cycles at the same time, cold water and hot water can be efficiently produced at the same time.

1 shows a prior art air-conditioning system;
2 shows a prior art two-stroke cycle heat pump.
FIG. 3 illustrates a three-way cycle heat pump system using air heat and hydrothermal according to an embodiment of the present invention. FIG.
FIG. 4 is a view showing the flow of refrigerant in hot water production in a three-way cycle heat pump system using air heat and hydrothermal heat in FIG. 3; FIG.
FIG. 5 is a view showing the flow of refrigerant during production of cold water in a three-way cycle heat pump system using air heat and hydrothermal heat in FIG. 3; FIG.
FIG. 6 illustrates a three-way cycle heat pump system using air heat and hydrothermal according to another embodiment of the present invention. FIG.
FIG. 7 is a view showing the flow of refrigerant during hot water production in a three-way cycle heat pump system using air heat and hydrothermal heat of FIG. 6;
8 is a view showing the flow of refrigerant during production of cold water in a three-way cycle heat pump system using air heat and hydrothermal heat of FIG. 6;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a three-way cycle heat pump system using air heat and hydrothermal of the present invention will be described in detail with reference to the accompanying drawings.

The concept of the present invention basically proposes a concept in which a heat exchanger and / or a compressor and an evaporator are additionally arranged in a conventional two-cycle cycle to maximize the efficiency of heating or cooling the refrigerant. Here, the name of the present invention is defined as a three-way cycle. However, in the three-way cycle, not only the three kinds of refrigerants flow with independent flow paths as in the example shown in FIG. 6 but also the flow is mixed And the like.

In addition, the present invention basically describes the case of production of hot water and cold water, but it should be understood that this includes the case of heating and cooling. That is, the medium for heat exchange with the refrigerant in the heat exchanger at the distal end of the system may be a liquid for heating or cooling, and such medium may be in a gaseous state when air conditioning is required. It should be noted that the heat exchangers described below are not necessarily limited to the description of the present invention, and that various heat exchanging means may be selectively used depending on the nature of the mediums requiring heat exchange.

FIG. 3 is a view showing a configuration of a three-way cycle heat pump system using air heat and hydrothermal according to an embodiment of the present invention.

The three-way cycle heat pump system using air heat and hydrothermal according to an embodiment of the present invention basically includes a first heat exchanger 10 for heat-exchanging heat between a first refrigerant and a medium, A first circulation part 101 communicating with the first refrigerant and forming a flow path which is a predetermined pipe through which the first refrigerant flows, and a second circulation part 101 through which heat is transferred to the first circulation part 101 via the second heat exchanger 20, A third circulation unit 202 for sharing a part of the flow path of the second cycle 200 and flowing a second refrigerant, And a water heat exchanger (31) constituting a part of the circulation part (202) and cooling the second refrigerant and the medium by heat exchange.

The first circulation unit 101 and the second circulation unit 201 are independent of each other, and the low-temperature heat of the second circulation unit 201 is supplied to the second heat exchanger 20 to the first circulation unit 101 and generates heat of the refrigerant heated in the first circulation unit 101 through the first heat exchanger 10 .

In the case of such a two-cycle cycle, the efficiency of warming up the heating oil path 40 can be further improved even when the outside air temperature of the air conditioner 30 disposed on the outdoor side is low, unlike the case of the conventional single cycle.

The concept of the present invention provides a concept of maximizing the efficiency of hot water generation by using the waste heat as described below while generating cold water by providing additional heat exchangers and compressors in the two-cycle cycle as described above.

The third circulation unit 202 includes a water heat exchanger 31 that generates cold water b or recovers heat from wastewater, a water thermal expansion valve 222, and a hydrothermal compressor 211, 3 The refrigerant flowing in the circulation unit 202 is the second refrigerant and the third circulation unit 202 shares a part of the flow path with the second circulation unit 201.

Here, the second circulation unit 201 and the third circulation unit 202 with respect to the first circulation unit 101 are each a modular system in which independent flows are formed. The first circulation unit 201 and the third circulation unit 202 circulate through the first circulation unit 101 The refrigerant is defined as the first refrigerant, and the refrigerant circulating in the second circulation unit 201 and the third circulation unit 202 is defined as the second refrigerant. The refrigerant flowing through the first circulation unit 101, the second circulation unit 201, and the third circulation unit 202 is compressed during the movement along the predetermined flow path, And the cycle in which the flow is performed functions as a heat pump.

When heating is performed, the outside heat absorbed by the air heat exchanger 30 is heated through the second circulation unit 201 and is transmitted to the first circulation unit 101 via the second heat exchanger 20 And the refrigerant heated by the first circulation unit 101 is finally transferred to the medium through the first heat exchanger 10. In the case of the simple two- If this is extremely low, there is a problem that is difficult to achieve the effect of generating the hot water properly. In other words, the efficiency of the second circulation unit 201 is very low, and it is difficult to expect a great effect even in comparison with a single cycle.

The third circulation unit 202 communicates with the second circulation unit 201 to form an endothermic cycle of absorbing the heat of the wastewater, .

This will be described in more detail with reference to FIG.

On the other hand, as described in the related art, when the cold water (b) is generated, the operation of the first circulation unit 101 is stopped and the efficiency of cooling is extremely lower than that in the case of heating. That is, since only one cycle is operated in the binary cycle, there is no difference from a single cycle. In the case of the present invention, since the hydrothermal compressor 211 of the third circulation unit 202 is utilized, .

The third circulation unit 202 communicates with the air heat exchanger 30 and operates independently of the first circulation unit 101. The third circulation unit 202 discharges heat to the outside air and further lowers the temperature of the air, The cold water b is generated.

Here, the water-heat exchanger 31 functions as a heat recovery apparatus for absorbing the waste heat at the time of heating or generating hot water (a), and functions as a cooling apparatus when cooling or cold water (b) is generated.

The first circulator 101 includes a first compressor 110 for compressing the first refrigerant, a first heat exchanger 10 communicating with the outlet of the first compressor 110, A first expansion valve 121 communicating with the outlet of the first heat exchanger 10 and a second heat exchanger 20 communicating with the first expansion valve 121.

Each of the heat exchangers described in the concept of the present invention has a function of transferring heat between different piping modules and has an independent piping which can communicate with independent flow paths. For convenience, in each cycle, The air inlet is defined as one side and the outflow inlet arranged on the generation side of hot water or cold water is defined as the other side. The heat exchangers are preferably of a plate type heat exchanger in consideration of heat transfer efficiency, but are not limited thereto. Here, since the air heat exchanger 30 functions to evaporate or condense the refrigerant by securing the surface area with air, a general evaporator can be applied.

FIG. 4 is a view illustrating operation of hot water generation in a three-way cycle heat pump system using air heat and hydrothermal according to an embodiment of the present invention.

The first circulation unit 101 circulates the first refrigerant for direct heating of the medium. When the first compressor 110 is operated, the compressed first refrigerant passes through the first heat exchanger 10, And flows into the liquid at a low temperature and a high pressure by discharging heat while heating the medium. At this time, the first heat exchanger 10 at the time of generating hot water operates as a refrigerant condenser.

The first refrigerant flowing through the first heat exchanger 10 flows into the low-temperature and low-pressure liquid through the first expansion valve 121, flows into the other side of the second heat exchanger 20, absorbs heat, (110). Here, the second heat exchanger 20 operates as an evaporator.

The warming cycle of the second circulation unit 201 includes a second compressor 210 and a second heat exchanger 210 connected to the output side of the second compressor 210 and performing heat exchange with the first circulation unit 101, A second expansion valve 221 connected to an output side of the one side of the second heat exchanger 20 to expand a second refrigerant flowing in a low temperature state, And an air heat exchanger (30) connected to the outdoor heat exchanger and performing heat exchange between the outdoor air and the second refrigerant.

The second circulation unit 201 circulates the second refrigerant through the second heat exchanger 20 to heat the first refrigerant. When the second compressor 210 is operated, The second refrigerant flows into and flows out to one side through a flow path communicated with the second heat exchanger 20 and discharges heat while heating the first refrigerant flowing to the other side of the second heat exchanger 20, Lt; / RTI > At this time, the second heat exchanger 20 at the time of generating hot water operates as a condenser of the circulation unit 201.

The second refrigerant flowing in the second heat exchanger 20 flows into the low-temperature and low-pressure liquid through the second expansion valve 221, flows into the air heat exchanger 30, absorbs heat, and flows into the second compressor 210 Is input again.

According to the concept of the present invention, the third circulation unit 202 flows the second refrigerant, absorbs the heat of the waste water into the second refrigerant through the water heat exchanger 31, compresses it through the hydrothermal compressor 211, And inputted to the second heat exchanger (20). At this time, the second refrigerant from the hydrothermal compressor 211 may be input to the second heat exchanger 20 together with the second refrigerant from the second compressor 210.

When the temperature of the outside air to which the air heat exchanger 30 is disposed is extremely low due to the addition of the third circulation unit 202, the third circulation unit 202 absorbs the heat of the groundwater or the wastewater and the second circulation unit 201 So that the efficiency of hot water (a) generation can be maximized.

The second refrigerant, which has been compressed as described above and has passed through the second heat exchanger 20, is further inputted to the hydrothermal expansion valve 222 and circulated through the water heat exchanger 31. Here, a part of the second refrigerant passing through the second heat exchanger (20) may be reduced to the air heat exchanger (30) and another part of the second refrigerant may be reduced to the water heat exchanger (31).

However, since the third circulation unit 202 can be selectively operated when the hot water a is generated, it is possible to selectively operate the second circulation unit 201 and the third circulation unit 202, One or more valves may be provided for control of the flow direction of the junction and / or the branch point, respectively.

A variety of devices can be used as long as the valves are control devices for the flow having a function of opening / closing or directional switching of the fluid. In addition, a three-way cycle heat pump system using a two-cycle cycle heat pump system of the present invention includes a microcomputer and a control unit (not shown) capable of controlling devices such as a valve and a compressor through a control signal from the microcomputer It is preferable that the valve is composed of an electromagnetic valve so that the valve can be controlled by an electric signal by the control unit.

Hereinafter, the description will be made with reference to a flow path as a pipe through which the flow of the second circulation section 201 and the third circulation section 202 is circulated.

The second circulation unit 201 includes a first flow path 261 extending from one side of the second heat exchanger 20 to the air heat exchanger 30 via the second expansion valve 221, And a third flow path 263 extending from the second compressor 210 to the second heat exchanger 20.

The third circulation unit 202 includes a first branch flow path 271 branched from the first flow path 261 and connecting the second heat exchanger 20 and the thermal expansion valve 222, A second branch passage 272 connecting the compressor 211 and a third branch passage 273 joined to the third passage 263 from the hydrothermal compressor 211.

Here, the position and the number of the valves may be varied according to the arrangement of the refrigerant device disposed on the path.

As described above, the first circulation unit 101, the second circulation unit 201, and the third circulation unit 202 are operated together according to the concept of the present invention, so that the air heat and the hydrothermal heat are transmitted to the air heat exchanger 30, The generation efficiency of the hot water can be maximized by the absorption of the hot water 31, and this effect can be further increased particularly in the case of a cold weather.

The hot water and the cold water can be generated simultaneously in the first heat exchanger 10 and the water heat exchanger 31 by the combination of the first circulation unit 101 and the third circulation unit 202, Simultaneous generation of hot water and cold water is possible even in the case of simultaneous operation of the first circulation unit 101, the second circulation unit 201 and the third circulation unit 202.

FIG. 5 is a view showing an operation of the three-way cycle heat pump system using the air heat and the hydrothermal heat generated by the two-cycle cycle according to the embodiment of the present invention at the time of generating cold water.

The generation of the hot water (a) is stopped when the cold water (b) is generated through the water heat exchanger (31), that is, the operation of the first compressor (110) is stopped and only the second refrigerant is circulated.

Although the second compressor 210 and the hydrothermal compressor 211 may operate together, that is, the second circulation unit 201 and the third circulation unit 202 may operate together to generate the cold water b, It is preferable that only the hydrothermal compressor 211 is operated to generate cold water.

Accordingly, the second refrigerant compressed through the hydrothermal compressor 211 is input to the air heat exchanger 30 to perform heat exchange with the outside air, and the second refrigerant, which has been cooled down through the air heat exchanger 30, flows through the hydrothermal expansion valve 222 Temperature low-pressure liquid state, exchanges heat with direct water through the water heat exchanger 31 to generate cold water (b), changes into a gas of high temperature and low pressure, and is returned to the hydrothermal compressor 211 again.

Here, since the hydrothermal compressor 211 can be operated both in the process of recovering the waste heat and the process of generating the cold water, it is preferable that an inverter compressor is used to vary the capacity.

Hereinafter, the description will be made with reference to a flow path as a pipe through which the flow of the second circulation section 201 and the third circulation section 202 is circulated.

The third circulation unit 202 is branched from the second branch flow channel 272 leading from the water heat exchanger 31 to the hydrothermal compressor 211 and a part of the third branch flow channel 273 A fourth branch passage 274 connecting the hydrothermal compressor 211 and the air heat exchanger 30 and a fifth branch passage 275 joining the third air passage 263 from the air heat exchanger 30 .

Here, the position of the valve and the number of the valves arranged to allow selection of the flow path used in the recovery process of the waste heat may be varied depending on the arrangement of the refrigerant device disposed on the path.

In the concept of the present invention, the second circulation unit 201 and the third circulation unit 202, in which the first refrigerant and the second refrigerant are independently circulated, can be selectively operated, are operated through a predetermined path, The efficiency of hot water production in the prior art can be improved and the efficiency of such hot water production can be further maximized by absorbing the heat of the wastewater in cold weather.

In addition, in the case of the conventional two-stroke cycle, the efficiency of cold water generation can be further improved by utilizing the air heat exchanger 30 and the hydrothermal compressor 211 in order to overcome a drastic reduction in efficiency at the time of generation of cold water.

6 is a view showing a three-way cycle heat pump system using air heat and hydrothermal according to another embodiment of the present invention.

The three-way cycle heat pump system using air heat and hydrothermal according to another embodiment of the present invention basically comprises a first heat exchanger 10 communicating with a heating oil or hot water flow path, a first heat exchanger 10, A first cycle (100) in which a first refrigerant flows and a second refrigerant flows and a flow path that is a predetermined pipe through which the first refrigerant flows is formed; and a second cycle in which the second refrigerant flows through the second heat exchanger A second heat exchanger (30) constituting a part of the flow path of the second cycle (200) and performing heat exchange with the outside air; a second heat exchanger A third cycle 300 in which a third refrigerant flows and a third heat exchanger 40 exchanges heat with the second cycle 200 through a third heat exchanger 40, And a fourth heat exchanger (50) for constituting a part and performing heat exchange of the third refrigerant for production of cold water or recovery of waste heat It achieved by also.

The first cycle 100, the second cycle 200 and the third cycle 300 are cycles in which the refrigerant flows independently. As will be described later, when the hot water is generated, the fourth heat exchanger The second heat exchanger 20 absorbs the waste heat from the second heat exchanger 50 and transfers the heat to the second heat exchanger 40 through the third heat exchanger 40, Stage cycle in which hot water is generated through the first heat exchanger (10) by transferring the refrigerant heated in the first cycle (100) to the first cycle (100).

Therefore, it is noted that the efficiency of generation of hot water is further improved even when the outside air temperature of the air conditioner exchanger 30 disposed on the outdoor side is extremely low, unlike the case of the single cycle or the binary cycle of the conventional art do.

Here, the first cycle 100, the second cycle 200, and the third cycle 300 are each a modular system in which independent flows are formed. The refrigerant circulating in the first cycle 100 flows through the first refrigerant 100, The refrigerant circulating in the second cycle 200 is defined as the second refrigerant and the refrigerant circulating in the third cycle 300 is defined as the third refrigerant. The refrigerant circulating in the first cycle (100), the second cycle (200), and the third cycle (300) is subjected to compression, expansion and heat exchange in a process of moving along a predetermined flow path, Thereby allowing the cycle to function as a heat pump.

The first cycle 100 and the second cycle 200 absorb the heat of the air heat exchanger 30 in the second cycle 200 when the heating is performed and heat the same in the second heat exchanger 20 to the heating cycle of the first cycle 100. The refrigerant heated and transferred in the heating cycle finally generates hot water a through the first heat exchanger 10, And then heated.

Here, as in the case of the above-described embodiment, there is a limitation in absorbing heat from the air heat exchanger 30 when the outside air temperature is extremely low. Therefore, it is necessary to absorb the waste heat. In another embodiment of the present invention, A third cycle 300 is additionally provided. This third cycle 300 further provides the heat required for warming, thereby ensuring the performance of the overall system.

That is, in the concept of the present invention, the simplified cycle of the first cycle (100), the second cycle (200), and the third cycle (300) .

The first cycle 100 includes a first compressor 110 compressing the first refrigerant, a first heat exchanger 10 communicating with the outlet of the first compressor 110, A first expansion valve 121 connected to the first heat exchanger 10 and a second heat exchanger 20 connected to an outlet of the first expansion valve 121 and the other side.

In the first cycle 100, when the hot water a is required to be generated, the first refrigerant circulates. When the first compressor 110 is operated, the compressed first refrigerant flows to the first heat exchanger 10, and generates heat from the other side and releases heat to flow into the liquid of low temperature and high pressure. At this time, the first heat exchanger (10) at the time of producing the hot water operates as the condenser of the first refrigerant.

The first refrigerant flowing through the first heat exchanger 10 flows into the low-temperature and low-pressure liquid through the first expansion valve 121, flows into the other side of the second heat exchanger 20, absorbs heat, (110). Here, the second heat exchanger 20 operates as an evaporator.

The second cycle 200 includes a second compressor 210, a second heat exchanger 20 connected to an output side of the second compressor 210 and performing heat exchange with the first cycle 100, A second expansion valve (221) connected to an output side of the second heat exchanger (20) and expanding a second refrigerant flowing in a low temperature state; a second expansion valve (221) connected to an output side of the second expansion valve And an air heat exchanger (30) in which heat exchange of the second refrigerant is performed.

In the second cycle 200, the second refrigerant circulates in order to heat the first refrigerant through the second heat exchanger 20. When the second compressor 210 is operated, 2 refrigerant flows into and flows out to one side through a flow path communicated with the second heat exchanger 20 and discharges heat while heating the first refrigerant flowing to the other side of the second heat exchanger 20, . At this time, the second heat exchanger (20) at the time of heating operates as the condenser of the second cycle (200).

The second refrigerant flowing in the second heat exchanger 20 flows into the low-temperature and low-pressure liquid through the second expansion valve 221, flows into the air heat exchanger 30, absorbs heat, and flows into the second compressor 210 Is input again.

In another embodiment of the present invention, the second cycle 200 further includes a third heat exchanger 40, which absorbs the waste heat when the hot water is generated, 200) can be maximized. Particularly, when the temperature of the outside air passing through the air-conditioner exchanger 30 is extremely low, the performance of heating through the two-way cycle is remarkably deteriorated. Therefore, the third heat exchanger 40 is provided with the air heat exchanger 30 It is possible to maximize the performance of the heating.

Accordingly, the third refrigerant flows through the third heat exchanger 40, and the second refrigerant passing through the second expansion valve 221 can be input to the third heat exchanger 40 according to this concept. The second refrigerant having undergone the heat exchange in the third heat exchanger (40) is reduced to the second compressor (210).

In the third cycle 300, the third refrigerant circulates in order to heat the second refrigerant through the third heat exchanger 40. When the third compressor 310 is operated, The third refrigerant flows in and flows out through the other flow passage communicated with the third heat exchanger 40, and is transferred to the second refrigerant.

The third refrigerant flowing in the third heat exchanger (40) flows through the second expansion valve (221) into the low temperature low pressure liquid and absorbs the heat of the wastewater flowing to the other side of the fourth heat exchanger (50) And is input to the third compressor 310 again.

In the second cycle 200, the flow path of the second refrigerant flowing in the third heat exchanger 40 and the flow path of the second refrigerant flowing in the air heat exchanger 30 share a part of the flow paths, One or more valves may be provided for control of the flow direction of the junction and / or the branch point.

A variety of devices can be used as long as the valves are control devices for the flow having a function of opening / closing or directional switching of the fluid. In addition, a three-way cycle heat pump system using a two-cycle cycle heat pump system of the present invention includes a microcomputer and a control unit (not shown) capable of controlling devices such as a valve and a compressor through a control signal from the microcomputer It is preferable that the valve is composed of an electromagnetic valve so that the valve can be controlled by an electric signal by the control unit.

Hereinafter, a description will be made with reference to a flow path as a pipe through which the flow is circulated in the second cycle (200).

The divided flow passage 281 branched on the flow path from the second expansion valve 221 to the air heat exchanger 30 communicates the second expansion valve 221 and the third heat exchanger 40, May be defined as a merging flow path 282 extending from the heat exchanger 40 to the second compressor 210. The merging flow path 282 may be joined to the flow path of the air heat exchanger 30 and the second compressor 210 have.

When the heat exchanger (30) and the third heat exchanger (40) are operated together, if the heat absorption from the air heat exchanger (30) is not sufficient, the heat of the refrigerant through the waste heat absorbed from the third heat exchanger The performance can be further improved, which means that the efficiency of generation of hot water through the first refrigerant is further increased.

However, if the temperature of the outside air is sufficiently high, the fourth heat exchanger 50 and the third heat exchanger 40 may not operate, and in some cases, the air heat exchanger 30 is not operated, 3 heat exchanger (40).

FIG. 7 is a view illustrating an operation of a three-way cycle heat pump system using air heat and hydrothermal at the time of generating hot water according to another embodiment of the present invention.

The first compressor 110 starts the compression operation and the compressed first refrigerant flows in and out from one side of the first heat exchanger 10 to generate heat while producing hot water a from the other side.

The first refrigerant having undergone the heat exchange in the first heat exchanger 10 flows into the low-temperature and high-pressure liquid state, is input to the first expansion valve 121, And receives heat from the second refrigerant in the second cycle 200 and is input to the first compressor 110 again in a high temperature and low pressure state. In this process, the second heat exchanger 20 functions as an evaporator of the first refrigerant.

Meanwhile, in the second cycle 200, the operation of the second compressor 210 is started. The operation of the second compressor 210 may be performed simultaneously with the first compressor 110 or may be performed at a time interval to be.

When the operation of the second compressor 210 is started, the compressed second refrigerant is inputted to one side of the second heat exchanger 20 to supply heat to the first refrigerant flowing from the other side.

The second refrigerant, which has been cooled down through the second heat exchanger (20), flows through the second expansion valve (221) into the low-temperature low-pressure liquid state, absorbs the heat of the outside air while passing through the air heat exchanger (30) And is returned to the second compressor 210 again.

Here, part or all of the second refrigerant output from the second expansion valve 221 is input to the other side of the third heat exchanger 40, exchanges heat with the third refrigerant, is warmed up, and then is returned to the second compressor 210 Can be input.

When the operation of the third compressor 310 is started in the third cycle 300, the compressed third refrigerant is inputted to the third heat exchanger 40 and is heat-transferred to the second refrigerant, Temperature low-pressure liquid state through the expansion valve 321, absorbs the heat of the wastewater in the fourth heat exchanger 50, and is converted into a gas of high temperature and low pressure and is returned to the third compressor 310 again.

In addition to the two-way cycle, the third cycle (300) absorbs the heat of groundwater or wastewater and warms it up to the second refrigerant. During the cold period, the heat pump There is an advantage that efficiency can be maximized.

Meanwhile, FIG. 8 is a view showing an operation at the time of cold water generation in a three-way cycle heat pump system using air heat and hydrothermal according to another embodiment of the present invention.

The first cycle 100 may be stopped when cold water is generated, so that only the second cycle 200 and the third cycle 300 are operated to produce cold water.

The basic process of heat transfer is similar to that of hot water production, but we will focus on some differences.

When the operation of the second compressor (210) is started, the compressed second refrigerant passes through the second expansion valve (221) through the second heat exchanger (20), flows into the low temperature and low pressure liquid state, 30, and is converted into a gas of high temperature and low pressure, and is returned to the second compressor 210 again.

However, only the third heat exchanger 40 may be operated in the air heat exchanger 30 interchangeably. In this case, the second refrigerant output from the second expansion valve 221 is entirely supplied to the third heat exchanger 40, And from there it can be reduced to the second compressor 210.

As described above, the air heat exchanger 30 and the third heat exchanger 40 may be operated together or may be operated interchangeably.

When the operation of the third compressor 310 is started in the third cycle 300, the compressed third refrigerant is inputted to the third heat exchanger 40 and is heat-transferred to the second refrigerant, Temperature low-pressure liquid state through the expansion valve 321, absorbs the heat of the wastewater in the fourth heat exchanger 50, and is converted into a gas of high temperature and low pressure and is returned to the third compressor 310 again.

7, when the cold water is generated, the fourth heat exchanger 50 performs the function of cooling the direct water rather than absorbing the waste heat.

In the cold water production process as described above, the two-way cycle in the conventional case operates in a substantially single cycle, whereas in the present invention, the production efficiency of the cold water is minimized by adding one cycle to operate as a two- The efficiency of the heat pump can be substantially maximized.

It should be noted that the generation of the cold water is not limited to the case of FIG. That is, when the first cycle 100, the second cycle 200 and the third cycle 300 are operated together, the heating performance is performed from the first heat exchanger 10 side of the first cycle 100, The cold water b can be generated by cooling the direct water since the cooling water is generated from the side of the fourth heat exchanger 50 in the third cycle 300.

At this time, the air conditioner exchanger 30 may be operated or not operated as occasionally. As described above, the third compressor 310 and the air heat exchanger 30 may be operated together through a predetermined valve, The flow to the air heat exchanger 30 may be closed when necessary so that the operations of heating and cooling may be performed continuously in the first heat exchanger 10 and the fourth heat exchanger 50. [

In addition, according to the concept of the present invention, when the outside temperature is extremely low, the use of external heat is blocked or the cycle of utilizing the heat of the wastewater is provided, thereby preventing deterioration of thermal efficiency and maximizing efficiency of heating or hot water generation There is an advantage that can be.

In addition, by operating at least two cycles at the same time, cold water and hot water can be efficiently produced at the same time.

In the foregoing, the present invention has been described in detail based on the embodiments and the accompanying drawings. However, the scope of the present invention is not limited by the above embodiments and drawings, and the scope of the present invention will be limited only by the content of the following claims.

10 ... first heat exchanger 20 ... second heat exchanger
30 ... air heat exchanger 31 ... water heat exchanger
40 ... third heat exchanger 50 ... fourth heat exchanger
100 ... First cycle 101 ... First circulation unit
110 ... first compressor 121 ... first expansion valve
200 ... second cycle 210 ... second compressor
201 ... second circulation unit 202 ... third circulation unit
211 ... a water-heat compressor 221 ... a second expansion valve
222 ... hydrothermal expansion valve 261 .. first flow path
262 ... second flow path 263 ... third flow path
271 ... 1st quarter Euro 272 ... 2nd quarter Euro
273 ... 3rd quarter Euro 274 ... 4th quarter Euro
281 ... split flow channel 282 ... merging flow channel
300 ... third cycle 310 ... third compressor
321 ... third expansion valve

Claims (5)

A first heat exchanger (10) for discharging heat of the first refrigerant;
A first circulation part (101) communicating with the first heat exchanger (10) and flowing a first refrigerant and having a first compressor (110) and a first expansion valve (121);
A second circulation unit 201 having a second compressor 210 and a second expansion valve 221, through which the second circulation unit 101 is thermally transferred through the second heat exchanger 20 and the second refrigerant flows, );
An air heat exchanger (30) constituting a part of the second circulation unit (201) and performing heat exchange with air;
A third circulation unit 202 sharing a part of the flow path of the second circulation unit 201 and flowing a second refrigerant and having a hydrothermal compressor 211 and a hydrothermal expansion valve 222; And
And a water heat exchanger (31) constituting a part of the third circulation part (202) and transferring heat to the second refrigerant,
When hot water is generated in the first heat exchanger (10)
The water heat exchanger (31) absorbs the heat of the wastewater and transfers it to the second refrigerant,
The second refrigerant compressed by the second compressor 210 absorbs the heat of the second refrigerant and the air compressed by the water-heat compressor 211 by absorbing the heat of the wastewater, And the heat transfer is conducted to the heat pump unit.
The method according to claim 1,
The hydrothermal compressor (211) is composed of an inverter compressor,
Wherein the operation of the first circulation unit (101) is stopped when cold water is generated in the water heat exchanger (31).
A first heat exchanger (10) communicating with heating oil or hot water flow path;
A first cycle (100) communicating with the first heat exchanger (10) and flowing a first refrigerant;
A second cycle (200) in which heat is transferred to the first cycle (100) through the second heat exchanger (20) and the second refrigerant flows;
An air heat exchanger (30) constituting a part of the flow path of the second cycle (200) and exchanging heat with outside air;
A third heat exchanger (40) constituting a part of the flow path of the second cycle (200);
A third cycle (300) in which the third refrigerant flows and the heat is exchanged through the third heat exchanger (40) in the second cycle (200); And
And a fourth heat exchanger (50) constituting a part of the third cycle (300) and performing heat exchange of third refrigerant for production of cold water or recovery of waste heat,
When hot water is generated in the first heat exchanger (10)
In the third cycle (300), the third refrigerant absorbing the heat of the wastewater is heated and transferred to the second cycle (200). In the second cycle (200), the heat of the outside air is absorbed from the air heat exchanger 2 refrigerant is transferred to the first cycle, and in the first cycle (100), the first refrigerant is heated to heat the direct water in the first heat exchanger (10) to generate hot water. Three - circle cycle heat pump system.
The method of claim 3,
Wherein the air heat exchanger (30) and the third heat exchanger (40) selectively flow the second refrigerant.
The method of claim 3,
The first cycle 100 includes a first compressor 110 and a first expansion valve 121,
The second cycle 200 includes a second compressor 210 and a second expansion valve 221,
The third cycle (300) includes a third compressor (310) and a third expansion valve (321)
The divided flow path 281 for communicating the second expansion valve 221 and the third heat exchanger 40 is branched from the flow path leading from the second expansion valve 221 to the air heat exchanger 30, (30) and the second compressor (210), wherein the confluent flow path (282) leading from the first compressor (40) to the second compressor (210) system.

Images