KR200465485Y1 - Hybrid heat pump system - Google Patents

Abstract

The present invention is a structure that utilizes the waste heat of waste water by applying it to the heavy water tank of the waste water treatment system that treats the sewage and waste water, and utilizes solar heat through the solar heat collecting plate, and the waste water according to the change of the situation such as night and day, summer and winter The present invention relates to a hybrid heat pump system capable of properly using waste heat and solar heat. The hybrid heat pump system includes a solar heat collecting plate for collecting solar heat, a compressor for compressing the refrigerant, a condenser for condensing the refrigerant, an expansion valve for expanding the refrigerant, an evaporator for evaporating the refrigerant, a four-way valve for switching the flow of the refrigerant, and A heat pump unit that transfers heat, including a refrigerant pipe connecting a compressor, a condenser, an expansion valve, an evaporator, and a four-way valve, and is connected between the solar heat collecting plate and the heat pump unit to exchange heat between the solar heat collecting plate and the heat pump unit. A first heat exchanger, at least one second heat exchanger inserted into the water tank to transfer the thermal energy of the stored water in the water tank to the heat pump unit, and heat-exchanging or cooling by heat exchange with at least one of the solar heat collecting plate and the heat pump unit It comprises a heat / cooling unit to perform.

Description

Hybrid heat pump system

The present invention relates to a hybrid heat pump system, and more specifically, it is a structure that utilizes waste heat of wastewater by applying to the heavy water tank of the wastewater treatment system for treating wastewater and wastewater, and utilizes solar heat through a solar heat collecting plate. The present invention relates to a hybrid heat pump system that enables the waste heat and solar heat of wastewater to be properly used according to the change of the situation in summer, winter and winter.

As industrialization progresses rapidly, energy consumption is increasing rapidly. In particular, the existing fossil energy is gradually exhausted, the cost is increasing, and the use of green energy and renewable energy to replace fossil fuels is encouraged while generating problems such as environmental pollution.

Energy consumption for heating and cooling of buildings currently used for residential or commercial use is rapidly increasing, and occupies the largest part in terms of overall energy consumption. Accordingly, the government encourages the use of various renewable energies, and among them, the use of direct electricity generation methods such as photovoltaic power generation and wind power generation is the most active. In addition to the method of producing electricity directly, a method for utilizing the geothermal heat for heating and cooling is being studied.

Geothermal heat pump system using geothermal heat is required to be constructed in a large site area by drilling more than 150m underground to utilize a constant temperature of the underground, the additional cost is high, it is impossible to use in a small area. Therefore, the method of using the waste water stored in the heavy water tank of the wastewater treatment system installed in the highway rest area has been studied. The waste water stored in the heavy water tank is always maintained at 5 ~ 25 ℃, so it maintains a temperature that is very suitable for the use of the heat pump regardless of winter or summer. In addition, the waste water stored in the heavy water tank has a large energy per unit area of the heat medium has the effect of reducing the heat transfer area required for heat exchange. However, conventionally, there has been no heat exchanger having a structure capable of appropriately utilizing the thermal energy of the waste water in the heavy water tank. The conventional heat exchanger was a structure that cannot be installed in the heavy water tank, and has a structure that circulates the waste water of the heavy water tank into the heat exchanger, causing contamination and washing of the heat exchanger according to long time use, and a separate pump for transporting the heavy water tank Needed. For this reason, there have been few cases of utilizing wastewater heat and have to rely on fossil fuels for heating and cooling.

There is a need for a system that can utilize the heat of wastewater in a heavy water tank properly and use it together with alternative energy such as solar heat to cool and heat it at low cost.

Therefore, by utilizing the heat of waste water in the heavy water tank properly, and using the cooling tower and solar heat collector as an auxiliary means, the cooling and heating and hot water supply system that can obtain a high COP (coefficient of performance) compared to the existing geothermal or air heat source It became necessary.

The technical problem to be achieved by the present invention is the structure that utilizes the waste heat of wastewater by applying it to the heavy water tank of the wastewater treatment system that treats sewage and wastewater, and utilizes the solar heat through the solar heat collecting plate, and the situation such as night and day, summer and winter It is to provide a hybrid heat pump system that can properly use waste heat and solar heat of waste water according to the change.

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

Hybrid heat pump system according to an embodiment of the present invention for achieving the technical problem, a solar heat collecting plate for collecting solar heat, a compressor for compressing the refrigerant, a condenser to condense the refrigerant, expansion valve for expanding the refrigerant And a heat pump configured to transfer heat, including an evaporator for evaporating the refrigerant, a four-way valve for switching the flow of the refrigerant, and a refrigerant pipe connecting the compressor, the condenser, the expansion valve, the evaporator, and the four-way valve. A first heat exchanger connected between the unit, the solar heat collecting plate and the heat pump unit to exchange heat between the solar heat collecting plate and the heat pump unit, and inserted into a water tank to receive thermal energy of stored water inside the water tank. At least one second heat exchanger for transferring to a heat pump unit, and the solar collector Plate and a heat / cooling unit by heat exchange with at least one of the heat pump unit performs a heat dissipation or cooling.

Hybrid heat pump system according to the present invention can exhibit a high thermal efficiency of 20 ~ 50% or more compared to a heat pump system using a conventional air heat, or a heat pump system using geothermal heat, there is no need to drill a deep underground It is very simple and economical to install because there is no need for additional work such as installing circulation pump for heat exchanger.

In addition, by interlocking with a solar heat collecting plate or a cooling tower, not only can the thermal efficiency be increased, but also the heating and heating or hot water supply can be performed while minimizing the influence of fluctuation of the external weather by using the heat source of the heavy water tank.

The hybrid heat pump system according to the present invention can be applied by a simple structural change in the existing system, and by controlling the operation of the heat exchanger which is a modular structure, the number of heat exchangers operated according to the degree of load is properly adjusted. The system is very stable because the operating temperature of the working fluid can be kept constant during operation.

In addition, the lake, reservoir, shrinkage heat devices, such as storage of a large amount of water can be easily applied anywhere, there is an advantage that can be used in conjunction with the existing system.

1 is an overall configuration diagram of a hybrid heat pump system according to an embodiment of the present invention.
FIG. 2 is a schematic diagram illustrating an operation process of the hybrid heat pump system of FIG. 1.
3 is a perspective view of a heat exchanger included in the hybrid heat pump system of FIG. 1.
4 is a perspective view illustrating a plurality of heat exchangers coupled adjacent to each other.
5 is a partially enlarged perspective view illustrating the heat exchanger of FIG. 3 coupled to an adjacent heat exchanger while forming a polygonal side.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish them, will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. It should be understood, however, that the present invention is not limited to the embodiments disclosed herein but may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, To the person having the invention, and this invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Hereinafter, a hybrid heat pump system 1 according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2. 1 is an overall configuration diagram of a hybrid heat pump system according to an embodiment of the present invention, Figure 2 is a schematic configuration for explaining the operation of the hybrid heat pump system of FIG.

Hybrid heat pump system 1 according to an embodiment of the present invention is a device capable of cooling and heating and hot water using the solar heat and waste water heat of the heavy water tank, the apparatus shown in Figure 1 is a refrigeration of the heat pump (heat pump) It is described based on the cycle. Thus, when the hybrid heat pump system 1 is used as a heating device, the condenser 102 and the evaporator 103 shown in FIG. 1 may operate to play opposite roles. That is, even if described with reference to the refrigeration cycle with reference to FIG. 1 in this specification can be used as a heating device in the same apparatus is natural.

The hybrid heat pump system 1 includes a heat pump unit 300, a solar heat collecting plate 110, a first heat exchanger 200, a second heat exchanger 400, a heat / cooling unit 600, and a cooling tower 500. do. The heat pump unit 300 refers to a device capable of cooling or heating by moving heat from a heat source, and includes a compressor 310, a condenser 320, an expansion valve 330, an evaporator 340, and a four-way valve ( 370 and a refrigerant pipe 390 connecting them. Specifically, the compressor 310 serves to suck and compress the low-temperature, low-pressure gas refrigerant sucked from the evaporator 340 to compress the high-temperature, high-pressure gas and send it to the condenser 320. The refrigerant used in the heat pump unit 300 may use R-410a, R-407c, and CO ₂ refrigerant, which are environmentally friendly alternative refrigerants. The refrigerant compressed by the high temperature and high pressure gas in the compressor 310 is transferred to the condenser 320 through the refrigerant pipe 390. The condenser 320 is a device for condensing and liquefying the high temperature and high pressure refrigerant gas discharged from the compressor 310. The condenser 320 is a kind of plate heat exchanger like the evaporator 340, and the role of the heat pump unit 300 operates according to the refrigerating cycle or the heating cycle. For example, when the heat pump unit 300 operates in a refrigeration cycle, the condenser 320 operates as a condenser, but when the heat pump unit 300 operates in a heating cycle, the condenser 320 operates as an evaporator. do. The refrigerant liquefied into a liquid of high temperature and high pressure through the condenser 320 is delivered to the expansion valve 330.

The expansion valve 330 lowers the pressure and temperature to easily evaporate the high-temperature, high-pressure liquid refrigerant in the evaporator 340, and supplies the appropriate amount of refrigerant to the evaporator 340 according to the load change, and heating and cooling It is possible to use a fixed temperature expansion valve with a bidirectional expansion valve structure that does not require any parts for switching. The external equalization tube and the thermostat are installed on the suction side pipe of the compressor 310, which is the discharge end of the evaporator 340, to ensure operational stability during cooling and heating operation.

A filter dryer 360 is installed between the condenser 320 and the expansion valve 330. The filter dryer 360 removes moisture and foreign substances contained in the refrigerant pipe 390 to prevent the COP of the heat pump unit 300 from being lowered and ensure engine stability.

On the other hand, the evaporator 340 is a heat exchanger in which the low-temperature, low-pressure liquid refrigerant from the expansion valve 330 is evaporated while absorbing the latent heat of evaporation, the indoor unit 610 is a low-temperature heat medium through the evaporator 340 Cold air is discharged. As described above, the evaporator 340 may be a plate heat exchanger, and may operate as a condenser when operated by a heating cycle. That is, the evaporator 340 and the condenser 320 may change roles in the cold half switching.

A gas-liquid separator 350 may be installed between the evaporator 340 and the compressor 310. The gas-liquid separator 350 serves to protect the compressor 310 by separating the liquid refrigerant contained in the refrigerant gas sucked into the compressor 310.

The three-way valve 380 is installed in the discharge pipe of the compressor 310 to control the movement direction of the refrigerant by the first heat exchanger 200 or the four-way valve 370. The three-way valve 380 and the four-way valve 370 are electronic solenoid valves, and are controlled by the controller 700. For example, when the water temperature inside the hot water supply unit 120 is below a prescribed temperature, the refrigerant flow of the valve operates in a heat exchange unit to the hot water supply unit 120, and when the water temperature is higher than the prescribed temperature, the refrigerant is bypassed to the hot water supply unit 120. Do not heat exchange with.

In addition, the controller 700 controls the overall operation and state of the heat pump unit 300 according to an external signal. For example, the overall control operation such as adjusting the state of the compressor 310 or the pressure of the suction and discharge pipes of the compressor 310 and blocking the overcurrent is performed. The heat pump unit 300 is connected to the solar heat collecting plate 110 and the hot water supply unit 120 through the first heat exchanger 200, and the waste water of the heavy water tank R by the second heat exchanger 400. Get heat.

The solar heat collecting plate 110 collects solar heat to generate heat energy, and transfers heat energy to the hot water supply unit 120 to produce hot water. The solar heat collecting plate 110 may be used only during the day and is connected to the heat pump unit 300 through the first heat exchanger 200 in order to compensate for the disadvantage of being affected by the weather. That is, the heat pump unit when the heat medium circulating the solar heat collecting plate 110 and the hot water supply unit 120 passes through the first heat exchanger 200 so that hot water above a predetermined temperature is not produced by the solar heat collecting plate 110. The heat is supplied from the 300 to produce hot water. By connecting the first heat exchanger 200 to the discharge pipe of the compressor 310 by the three-way valve 380, the heat pump unit 300 can always supply hot water regardless of whether the heat pump unit 300 operates in a refrigeration cycle or a heating cycle. do.

Meanwhile, the condenser 320 of the heat pump unit 300 is connected to the cooling tower 500 and the second heat exchanger 400. The cooling tower 500 and the second heat exchanger 400 are for lowering the temperature of the cooling water circulated to the condenser 320, and the second heat exchanger 400 is inserted into the heavy water tank R to receive the heavy water tank R. It may be used to transfer the heat of the waste water stored therein to the condenser 320. When the cooling capacity of the heat pump unit 300 is greater than that of the heavy water tank R, the cooling tower 500 may be installed together with the second heat exchanger 400. The second heat exchanger 400 is formed in a module form and a plurality of the heat exchangers 400 may be coupled to each other and inserted into the heavy water tank R. The second heat exchanger 400 controls the circulation of the coolant in each of the second heat exchangers 400 according to the condensation temperature of the coolant. Control valves 420 are provided respectively. That is, by blocking the movement of the cooling water supplied for each module of the second heat exchanger 400, the condensation temperature of the cooling water can be prevented from being lowered too much, thereby maintaining the stability of the entire system. The structure of the second heat exchanger 400 will be described later in detail.

With reference to Figure 2 will be described in detail the operation of the hybrid heat pump system 1 according to an embodiment of the present invention.

As described above, the hybrid heat pump system 1 includes the solar heat collecting plate 110, the first heat exchanger 200, the heat pump unit 300, the second heat exchanger 400a, 400b, and 400c and the heat / cooling unit ( 600). Here, the heat / cooling unit 600 refers to a device capable of cooling or heating by receiving heat energy from the solar heat collecting plate 110 or the heat pump unit 300 or absorbing latent heat of evaporation. The indoor unit 610 is connected to the hot water supply unit 120 or the heat pump unit 300 connected to the concept. That is, since the indoor unit 610 connected to the heat pump unit 300 may serve as a heater or a cooler according to the operating state of the heat pump unit 300, the hot water supply unit 120 and the indoor unit 610 may be collectively referred to as heat / cooler. The cooling unit 600 is called.

In the hybrid heat pump system 1, in a summer day, a sufficient amount of hot water may be generated in the hot water supply unit 120 by solar heat collected by the solar heat collecting plate 110. In this case, the hot water supply unit 120 may generate a sufficient amount of hot water by the heat energy obtained from the solar heat collecting plate 110, and a temperature sensor for measuring the temperature of the hot water supply unit 120 and the first heat exchanger 200, respectively. 121 and 122 transmit the measured value to the control unit 700, and the control unit 700 may operate the heat pump unit 300 in a refrigeration cycle for cooling the room. At this time, the three-way valve 380 between the heat pump unit 300 and the hot water supply unit 120 exchanges refrigerant between the first heat exchanger 200 and the heat pump unit 300 in the first heat exchanger 200. To prevent heat exchange.

However, when the solar heat is not sufficiently collected, such as at night or in the summer, it is possible to receive the required amount of thermal energy from the heat pump unit 300 connected by the first heat exchanger 200. In this case, the heat pump unit 300 may operate in any one of a refrigeration cycle or a heating cycle. When operating in a heating cycle, heat energy is absorbed from the waste water stored in the heavy water tank R through the second heat exchangers 400a, 400b, and 400c and transferred to the hot water supply unit 120.

On the other hand, the second heat exchanger (400a, 400b, 400c) is connected in parallel to the cooling water pipe 410, the control valves (420a, 420b) in the extension pipe of the heat exchange tube 440 of each second heat exchanger 400, respectively , 420c is connected. The control valves 420a, 420b, and 420c are valves that can independently control each of the second heat exchangers 400. The control valves 420a, 420b, and 420c may selectively operate the second heat exchangers 400 according to a change in the condensation temperature of the cooling water. have. For example, when the condensation temperature is lowered, it is possible to limit the operation of some of the second heat exchanger 400 to prevent the condensation temperature from being lowered too much.

In addition, when the cooling capacity of the heat pump unit 300 exceeds the capacity of the heavy water tank R, the cooling tower 500 is connected to the cooling water pipe 410 to connect the second heat exchanger 400 and the cooling tower 500. Can be operated at the same time. At this time, the three-way valve 430 for controlling the direction of the cooling water flowing to the cooling tower 500 and the second heat exchanger 400 may be installed in the cooling water pipe 410.

Hereinafter, the second heat exchanger will be described in detail with reference to FIGS. 3 to 5. 3 is a perspective view of a heat exchanger included in the hybrid heat pump system of FIG. 1, FIG. 4 is a perspective view illustrating a plurality of heat exchangers adjacently coupled to each other, and FIG. 5 is a polygon with a heat exchanger adjacent to the heat exchanger of FIG. 3. Partial enlarged perspective view showing the combined state while forming the sides.

The second heat exchanger 400 included in the hybrid heat pump system 1 according to the exemplary embodiment of the present invention may be formed in a module unit, and at least one may be used. When the second heat exchanger 400 is used in plural, the second heat exchanger 400 may be used by being coupled side by side in the horizontal direction or the vertical direction.

The configuration of the second heat exchanger 400 will be described in detail. The second heat exchanger 400 is a frame 401 forming a frame, a heat exchanger accommodated in the frame 401, and a heat medium (cooling water) moves therein. Tube 440.

The heat exchange tube 440 may be formed of a material having excellent heat transfer so that heat exchange with the waste water in the heavy water tank R is performed while the heat medium moves therein. For example, it may be formed of high density polyethylene, copper tube, vinyl chloride, thermo-excel tube and the like. The heat exchange tube 440 may be accommodated in two rows inside the frame 401. That is, the heat exchange tube 440 includes a first tube 441 formed in the serpentine shape from the top to the bottom of the frame 401 and a second tube 442 formed in the serpentine shape from the bottom to the top direction. do. The first tube 441 and the second tube 442 are substantially one tube, starting from the upper end of one side of the frame 401 and formed in the serpentine structure in the lower direction, and then toward the upper end in the serpentine structure. Refers to what is formed. Thus, the heat exchange tube 440 has a serpentine structure, and the reason why the first tube 441 and the second tube 442 are formed in a double structure is to increase the heat transfer rate and facilitate circulation of the heat medium therein.

Inside the frame 401, a fixing member for fixing the first tube 441 and the second tube 442 is provided.

Meanwhile, the first tube 441 and the second tube 442, which are both ends of the heat exchange tube 440, respectively extend out of the frame 401, and at least one of the first tube 441 and the second tube 442. Is provided with a control valve 420 for controlling the flow of the heat medium (cooling water) inside the heat exchange tube 440. The heat exchange tube 440 is connected in parallel with the heat exchange tube of the adjacent second heat exchanger in order to increase the cooling capacity of the heat pump unit 300.

Referring to FIG. 4, a plurality of second heat exchangers 400a, 400b, 400c, and 400d having a rectangular frame 401 may be connected to each other in a horizontal direction or a vertical direction. That is, the second heat exchangers 400a, 400b, 400c, and 400d are coupled in the horizontal direction or the vertical direction according to the capacity or shape of the water tank R in which the second heat exchangers 400a, 400b, 400c, and 400d are accommodated. This is possible.

Referring to FIG. 3 again, a carrying ring 460 is formed at an upper end of the frame 401 to facilitate the carrying of the second heat exchanger 400. At least two conveying rings 460 may be formed, and preferably four may be formed.

A connection hole 445 is formed at a side of the frame 401 of the second heat exchanger 400, and a plurality of second heat exchangers 400 are adjacent to each other and bolted to each other through the connection hole 445. That is, the second heat exchanger 400 is disposed so that the adjacent second heat exchanger 400 and the connection hole 445 coincide with each other, and are coupled to each other by bolts.

Referring to FIG. 5, the second heat exchanger 400 may be arranged in an annular shape to form a polygonal side. In detail, the connection member 450 may be interposed between the second heat exchanger 400 and the adjacent second heat exchanger 400 to connect the plurality of second heat exchangers 400 to each other. The plurality of second heat exchangers 400 may be connected to be refracted to each other, so that the second heat exchangers 400 having a rectangular shape may be connected to each other by a connection member 450 having a triangular or trapezoidal shape so as to be connected at an angle not parallel to each other. Means to be connected. As such, when the second heat exchanger 400 is arranged in an annular shape to form a polygonal side, an efficient space arrangement is possible in the circular water tank R. FIG.

On the other hand, the arrangement of the second heat exchanger 400 is not necessarily limited to the annular shape to form a polygonal side, it can be variously modified to suit the shape of the heavy water tank (R) by using the connection member 450 appropriately. There will be.

While the embodiments of the present invention have been described herein with reference to the accompanying drawings, those skilled in the art will appreciate that the present invention can be practiced in other specific forms without departing from the spirit or essential characteristics thereof You will understand. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

1: Hybrid heat pump system 110: solar heat collector
120: hot water supply unit 200: first heat exchanger
300: heat pump unit 310: compressor
320: condenser 330: expansion valve
340: evaporator 350: gas-liquid separator
360: filter drier 370: 4-way valve
380: 3-way valve 390: refrigerant piping
400: second heat exchanger 410: cooling water piping
420: control valve 430: three-way valve
500: cooling tower 600: heat / cooling unit
610: indoor unit 700: control unit

Claims (9)

A solar heat collecting plate for collecting solar heat;
A compressor for compressing the refrigerant, a condenser for condensing the refrigerant, an expansion valve for expanding the refrigerant, an evaporator for evaporating the refrigerant, a four-way valve for switching the flow of the refrigerant, and the compressor, the condenser, the expansion valve, the A heat pump unit configured to move heat including an evaporator and a refrigerant pipe connecting the four-way valve;
A first heat exchanger connected between the solar heat collecting plate and the heat pump unit to exchange heat between the solar heat collecting plate and the heat pump unit;
At least one second heat exchanger inserted into a water tank to transfer thermal energy of stored water in the water tank to the heat pump unit;
A heat / cooling unit that performs heat dissipation or cooling by heat exchange with at least one of the solar heat collecting plate and the heat pump unit.
The second heat exchanger includes a frame forming a frame and a heat exchange tube accommodated in the frame and having a heat medium moving therein; And
It includes a connecting member for connecting the plurality of second heat exchangers refracted to each other,
The second heat exchanger is formed with a connection hole connected to the second heat exchanger adjacent to the side of the frame, the plurality of second heat exchangers are adjacent to each other bolted through the connection hole,
And a plurality of the second heat exchangers are formed in an annular shape to form polygonal sides. delete The method of claim 1,
The heat exchange tube is a hybrid including a first tube formed in a serpentine shape from the top to the bottom of the frame, and a second tube connected to the first tube in a serpentine shape from the bottom to the upper direction Heat pump system. delete delete delete The method of claim 1,
The second heat exchanger further comprises a control valve for controlling the movement of the heat medium in the heat exchange tube and installed for each of the second heat exchangers. The method of claim 1,
The heat pump unit further includes a three-way valve at the outlet of the compressor, wherein the first heat exchanger is connected to the three-way valve. The method of claim 1,
Hybrid heat pump system formed with at least two carrier ring on the top of the frame.

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