KR20100059170A - Heat pump storage system - Google Patents

Abstract

PURPOSE: A heat storage system with a heat pump is provided to simultaneously heat water and refrigerant in summer and to simultaneously provide heating and hot water supply functions in winter. CONSTITUTION: A heat storage system(300) with a heat pump comprises a compressor(1), an outdoor unit(2), a condenser, an expansion valve(20), an evaporator, a control valve(30,31), a hot water heat exchanger(3), a hot water pump(10), a heat storage system(400) and a four-way valve(5). The compressor compresses and discharges refrigerant gas at a high pressure and a high temperature. The condenser condenses the compressed refrigerant to a liquid state. The expansion valve enables the condensed high-pressure and high-temperature liquid refrigerant to be expanded to the low-pressure liquid refrigerant. The evaporator returns the refrigerant gas of low temperature and low pressure to the compressor. The heat storage system is composed of a hot water heat exchanger(4), a hot water supply pump(11), a hot water storage tank(8), a cold/hot heat exchanger(40), and a cold/hot heat storage tank(7) and is operated if necessary.

Description

Heat pump storage system {Heat pump storage system}

The present invention relates to a heat pump heat storage system, a summer heat storage of a cold heat source and hot water, and a winter heat storage system for heat storage and hot water and hot water, more specifically an ice heat storage cooling system by a refrigeration cycle or cold water heat storage reverse cycle The present invention relates to a refrigeration-heat storage type composite heat pump system that can be used for cooling and heating alternately according to seasons by combining a heat shrinkage heating system with a heat sink.

In general, cold heat storage (ice heat storage or cold water) equipment uses a surplus electricity in the late-night time to generate ice or cold water and store it in the heat storage tank, and then cool it by using a heat storage source of the heat storage tank at a time when the load due to cooling increases. It is a device that does.

   FIG. 7 is a schematic diagram of a conventional ice storage heat storage system, and as shown, the ice storage system includes a compressor 101, an outdoor unit 102, a heat storage tank 105, and an expansion valve 104.

 Generally, circulating water is stored in the heat storage tank 105 of the ice heat storage system by a predetermined level, and the refrigerant cooled in the outdoor unit passes through the inside of the heat exchange coil 103 installed in the heat storage tank 105 at night to accumulate and ice the outside of the coil. Is formed, and the cooling water which thawed the ice of the coil exterior during the day is sent to an indoor unit, and indoor cooling is implemented. The circulating water used for cooling is recovered to the outdoor unit through a recovery pipe, heat exchanged, and then cooled again.

However, the conventional small ice heat storage heat pump system achieves the purpose of indoor cooling by supplying the indoor water through the supply pipe the cold water thawed during the day after freezing the circulating water in the heat storage tank by the operation of the refrigeration cycle using the late night power. In winter, there were inconveniences of having separate heating facilities for indoor heating and cost problems due to additional equipment.

The present invention is to improve the above problems, by combining the cooling system of the heat storage cooling (ice heat storage or cold water) by the heat pump cycle and the shrinkage heat heating system by the reverse cycle can be cooled or heated according to the season. It is an object of the present invention to provide a complex heat pump system that is configured to be switchable so that it can be regenerated and supplied by a four season hot water supply heat source.

The present invention attaches a hot water heat exchanger, a hot water heat exchanger, a cold heat exchanger, a cold heat storage tank and a hot water storage heat storage tank to a heat pump system, and simultaneously heat storage of a hot water supply and a cold heat source in the summer, and simultaneously heat storage of a hot water supply and a heating hot water, As a multi-stage condensation cycle in the summer and winter seasons, it is possible to reduce the power consumption of the compressor by accumulating high temperature hot water and reducing the condensation pressure.

The present invention relates to a heat storage system using a heat pump system, the purpose of which is to heat storage hot water and cold heat source at the same time in summer, and to the energy-saving system to heat storage hot water and heating hot water at the same time in winter, condenser during the refrigeration cycle in summer Hot water can be supplied without additional energy by using the waste heat of hot water supply. In winter, hot water and heating water are regenerated by using hot water heat exchanger and condensation heat exchanger as condensers. The best residential space can be created by supplying the ondol heating and hot water at the same time.

In addition, the high-efficiency heat pump is pioneering a new energy source as a heating source for winter, and it has the effect of suppressing the generation of global warming gas CO2, and the high-temperature and high-pressure compressed refrigerant gas at the outlet of the compressor is sequentially used in a hot water supply heat exchanger and a condensation heat exchanger. Because of the multi-stage condensation, the heat transfer area of the heat exchanger is increased, thereby increasing the heating heat by high efficiency heat exchange, reducing the power consumption of the compressor by reducing the condensation pressure, and preventing the compressor from being burned out due to overload.

In order to achieve the above object, the heat pump system according to the present invention, a compressor for compressing and discharging the refrigerant gas at a high temperature and high pressure state, a condenser for condensing the refrigerant compressed by the compressor in the liquid phase, and condensed in the condenser An expansion valve for expanding a liquid refrigerant in a high temperature and high pressure state into a liquid refrigerant in a low pressure state, and using a latent heat of evaporation of the refrigerant while evaporating the refrigerant expanded in the expansion valve to achieve a freezing effect by heat exchange with the object to be cooled. In the heat pump system comprising an evaporator for returning the refrigerant gas of the low-temperature low-pressure gas phase to the compressor and the four sides for switching between cold and heating,

       A heat pump system (300) comprising the compressor (1), outdoor unit (2), hot water heat exchanger (3), and four sides (5);

Heat storage tank system 400 consisting of the cold and hot heat storage tank (7), hot water storage tank (8), hot water heat exchanger (4), pumps (10, 11) and heat exchanger (40).

The features and advantages of the present invention will become more apparent from the detailed description of the preferred embodiments based on the accompanying drawings.

Prior to this, terms or words used in the present specification and claims should not be construed as being limited to the common or dictionary meanings, and the inventors may properly interpret the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Hereinafter, an embodiment of a heat pump according to the present invention will be described with reference to the accompanying drawings.

1 is a cycle diagram showing a schematic diagram of a heat pump system according to the present invention.

Reference numeral 1 denotes a compressor, which is used to inhale refrigerant gas, compress it at high temperature and high pressure, and discharge it, and various forms such as reciprocating type, crank type, swash plate type, wobble plate type, rotary type, and scroll type depending on the purpose of use. Compressor can be applied.

The discharge line of the compressor (1) is connected to the four sides (5) via the hot water heat exchanger (4), and the control valve (38) has four sides in parallel with the heat exchanger (4) at the outlet of the compressor (1). It is connected to (5), the four sides (5) is connected to the outdoor unit (2).

The hot water supply heat exchanger (4) and the indoor unit (2) are condensed into a liquid refrigerant having a high temperature and high pressure by dissipating the refrigerant gas compressed and discharged from the compressor (1) as a condenser during the cooling operation. Although not shown in detail, the condenser is an air heat exchanger, and a plurality of tubes forming a predetermined flow path by connecting the inlet header and the outlet header and the inlet / outlet headers to communicate with each other, and between the tubes. Conventional forms with corrugated heating fins laminated to can be applied. Therefore, the air blown by the cooling fan passes through the heat transfer fins between the tubes. In this process, the refrigerant flowing in the condenser loses heat to the blower air, thereby performing the condensation of the refrigerant.

In addition, when the condenser is a water heat exchanger, the heat condensation of the refrigerant is performed by taking heat into the water inside the heat exchanger in the form of a plate heat exchanger, a cell-and-tube heat exchanger, a spiral tube, and a double tube heat exchanger.

On the other hand, the inlet line side of the compressor (1) by evaporating the refrigerant flowing from the expansion valve (4) to be described later by using the latent heat of evaporation heat exchanged between the object to be cooled and the refrigerant to achieve a freezing effect heat exchanger 40, the evaporator is connected. The cold heat exchanger 40 (evaporator) includes a plurality of tubes forming a predetermined flow path by connecting an inlet header and an outlet header and the inlet / outlet headers so as to communicate with each other, and a corgate stacked between the tubes. The usual type with the heat transfer fins can be applied. Therefore, the air blown by the cooling fan passes through the heat transfer fins between the tubes, and in this process, the refrigerant flowing in the evaporator takes the temperature (calories) of the blowing air, and thus the refrigerant evaporates.

In addition, when the cold heat exchanger 40 is a water heat exchanger in the form of a plate heat exchanger, a cell-and-tube heat exchanger, a spiral tube and a double tube heat exchanger, and the like, heat is taken into the water inside the heat exchanger to perform evaporation of the refrigerant. .

In addition, an inlet end of the cold heat exchanger 40 (evaporator) expands the liquid refrigerant in a high temperature and high pressure state into a low pressure refrigerant by throttling to supply the cold heat exchanger 40 so as to easily evaporate. Expansion valve 20 is installed. Although not shown in detail here, the expansion valve 20 has an internal pressure equalizing, capillary tube for controlling the trajectory of the high-pressure refrigerant flow path through the pressure transfer rod by the expansion displacement of the diaphragm according to the temperature inside the temperature reduction chamber. In general, the thermostatic expansion valve, the capillary type, and the electronic expansion valve, which are called TEV, can be used in various forms, such as an external pressure control method for adjusting the trajectory of the high-pressure refrigerant flow path by the expansion displacement of the diaphragm.

Hereinafter, an embodiment of a heat pump according to the present invention will be described with reference to the accompanying drawings.

In Fig. 1, the flow of the refrigerant is compressed into a refrigerant gas of high temperature and high pressure in the compressor 1, and condensed from the gas phase to the liquid phase in the hot water heat exchanger 4, the condenser, and then heat exchanged in the outdoor unit 2 via the four sides. After the liquid is converted into the liquid phase, it is decompressed while passing through the expansion valve (5), passes through the four sides (5) through the cold heat exchanger (40, evaporator), and is introduced into the suction part of the compressor (1). 4) There is a control valve 38 on the pipe bypassed to the four sides (5) without passing through, the expansion valve 20 is connected to the heat exchanger (3, 40) by the control valves (30, 31, 39) on the outlet side It is a rescue.

Referring to the operation of the present invention, when classified according to the operation combination form of the hot water supply heat exchanger (4, condenser), condensation heat exchanger (3, condenser), cold heat exchanger (40) and outdoor unit (2),

1) summer hot water and cold heat storage mode;

2) It can be classified into hot water and hot water heat storage mode in winter.

First, the hot water supply and cold heat storage mode in the summer season is carried out by the refrigerant gas of the high temperature and high pressure of the compressor (1).

The hot water heat exchanger (4) is condensed with water inside the heat exchanger (4) in a gaseous state, and condensed into a refrigerant in a liquid state after passing through the four sides (d → c) to the outdoor unit (2, condenser). .

The state of the refrigerant introduced into the outdoor unit 2 (condenser) is a liquid state, a gas state, and a partial gas state, and after the heat exchange with the outdoor air, the refrigerant is condensed and supercooled into the liquid state, and the refrigerant at the outlet of the outdoor unit 2 is the expansion valve 20. After passing through the control valve 31 and passing through the control valve 31 and the heat exchanger in the cold storage heat exchanger (40, evaporator) with the water in the heat storage tank after the conversion from the liquid phase to the gas phase and the four sides (5, e → s) through the compressor (1 ), The water in the heat storage tank (7) is stored as ice or cold water to be used as a cooling heat source when cooling the fan coil or air conditioner.

In the summer, the hot water heat exchanger 3, the hot water pump 10, and the control valve 39 are not used as the control valve 30 is closed.

At this time, the hot water supply heat exchanger (4) is a structure that supplies heat to the hot water supply pump 11 to the hot water pump 11 by heat exchange with the high temperature and high pressure compressed refrigerant gas at the outlet of the compressor (1), a separate hot water heat source (boiler) In the summer, the control valve 38 is opened or closed in accordance with the condensation pressure, and the high temperature and high pressure compressed refrigerant gas at the outlet of the compressor 1 is supplied to the hot water supply heat exchanger 4 and Since the condenser is sequentially condensed in the outdoor unit (2, condenser) in order to reduce the power consumption of the compressor (1) by reducing the condensation pressure when the outdoor temperature rises in the summer (see Fig. 4), and prevents the compressor from being burned out due to overload. can do.

In addition, by cooling the refrigerant introduced into the cold heat exchanger (40, evaporator) (see Fig. 4) to increase the cooling capacity.

Next, in the hot water supply and hot water heat storage mode of the winter season, the refrigerant gas of the high temperature and high pressure of the compressor 1 is transferred from the hot water heat exchanger 4 to the liquid refrigerant after heat exchange with water in the heat exchanger 4 in a gaseous state. It is condensed and drawn into the condensation heat exchanger (3, condenser) via the four sides (d → e).

The state of the refrigerant introduced into the condensation heat exchanger (3, condenser) is a liquid state, gaseous state and partial gas state is condensed and subcooled with the refrigerant in the liquid state after heat exchange with the air in the room, the outlet of the condensation heat exchanger (3, condenser) After the refrigerant is passed through the control valve 30 and the expansion valve 20, the pressure is reduced, the heat exchanger with the outdoor air in the outdoor unit (2, evaporator) after converting from the liquid phase to the gas phase and passing through the four sides (5, c → s) It is sucked into the compressor (1).

The cold heat exchanger 40 is not used in the winter season as the control valve 31 is closed.

At this time, the hot water supply heat exchanger (4) is a structure in which heat is supplied to the hot water tank (8) in a circulation structure by heat-exchanging with a high temperature and high pressure compressed refrigerant gas at the outlet of the compressor (1), and separately No need for hot water supply (boiler), the cold heat storage tank (7) is supplied as a heat source of the floor heating or heating equipment in winter, so that the best residential space can be made by the ondol heating, which is a characteristic of the home of our country.

In addition, the high-temperature, high-pressure compressed refrigerant gas at the outlet of the compressor (1) is condensed sequentially in the hot water supply heat exchanger (4) and the condensation heat exchanger (3), thereby increasing the heat transfer area of the heat exchanger to increase the heat of heating by high efficiency heat exchange. By increasing the condensation pressure, the power consumption of the compressor (1) can be reduced (as described in Fig. 4), and the compressor can be prevented from being burned due to overload.

In addition, by cooling the refrigerant introduced into the outdoor unit (2, evaporator) (see Fig. 4) to increase the freezing effect.

In this mode, the hot water pump 11 and the hot water pump 10 are turned on so that the hot water heat exchanger 4 and the condensation heat exchanger 3 exchange heat with the refrigerant gas.

  In addition, the sequence of condensation heat exchange is a multi-stage condensation structure in which the hot water heat exchanger 4 first exchanges hot water with hot water to generate hot hot water, and operates the condensation heat exchanger 3 when the condensation pressure rises. Prevents rise and enables high temperature heat storage.

At this time, the control valves 38 and 39 are configured to be closed (OFF) when the heat exchanger is turned on and open when the heat exchanger is stopped.

Another embodiment FIG. 2 is a form in which a cold heat exchanger 40 is used as an evaporator in the summer and a condenser in the winter, and the control valve 32 is closed in the summer in the heat pump system 300. It is the structure to control by the condensation pressure in the winter season.

In the cycle, there is no condensation heat exchanger 3 and hot water pump 10 in FIG. 1, and the cold heat exchanger 40 serves as both an evaporator and a condenser, and directly with the refrigerant inside and the water inside the cold heat storage tank 7. It is in the form of heat exchange, the control valve 32 or the control valve 38 can be operated in the form omitted.

Another embodiment FIG. 3 is an indirect heat exchange type for circulating a brine, not a refrigerant, into a cold heat exchanger 40 in a heat pump system 300. The hot water heat exchanger 3 uses internal brine as an evaporator in the summer. It is an indirect cooling method that cools the water inside by cooling the heat exchanger 40 attached to the inside of the cold heat storage tank 7 by circulating the brine pump 10 by cooling.

In the winter season, the hot water heat exchanger 3 is used as a condenser, and the refrigerant gas of high temperature and high pressure and the brine inside the hot water heat exchanger 3 and the heat exchanger are condensed, and the brine is heated, so that the brine pump 10 ) By heating the water outside the cold, heat exchanger (40) inside the cold heat storage tank (7) and the brine is cooled and introduced again into the hot water heat exchanger (3).

The control valves 30, 31, 32, 38, and 39 are valves for controlling the flow of refrigerant (ON, OFF), and may be manufactured in various forms such as an electromagnetic valve, a check valve, and a solenoid valve.

In addition, since the hot water supply heat exchanger 4 and the outdoor unit 2 condensate as a condenser in the summer, the hot water temperature at the outlet of the hot water supply heat exchanger 4 can be raised to a high temperature as well as the condensation pressure is lowered. Since the gas 4 and the hot water heat exchanger 3 condense in multiple stages as condensers, the hot water temperature at the outlet of the hot water supply heat exchanger 4 and the hot water heat exchanger 3 as well as the lowering of the condensation pressure can be made high.

        4 is a diagram Pi illustrating a cycle of a heat pump system according to the present invention, where conventional refrigeration air conditioning cycles i1 ′, i2 ′, i3 operate at high pressure P2 ′ and low pressure P1 ′. In the cycles i1, i2, i3 of the invention, in the system operating at high pressure (P2) and low pressure (P1), the discharge temperature is i2 'is higher than i2, so i2' becomes high temperature, and the amount (i2'-i1 ') Is larger than the amount (i2-i1), the conventional refrigeration air conditioning system causes damage due to the overload of the compressor (1) with more work and a higher discharge temperature, unit cooling capacity (i1-i3) is (i1 It is larger than '-i3'), and it improves the cooling capacity of the evaporator, so that the air at the outlet of the evaporator can be cooled to a lower temperature.

     5 and 6 are time-pressure diagram and pressure-power diagram when the heat pump system is operated in summer hot water supply and cold heat mode according to the present invention, the conventional refrigeration air conditioning cycle (AB-C ') is a high pressure (P2') Cycle (ABC) of the present invention is a high pressure (P2), the power consumption at this time consumes W1 at P2, W2 at P2 ', so W2> W1, the cycle of the present invention is better than the conventional heat pump system High efficiency cycle with low energy consumption.

      In addition, in the summer, cooling and hot water supply are simultaneously performed so that high efficiency operation of cooling energy efficiency (energy efficiency = cooling capacity / total energy input) 2.5 and heating energy efficiency 3.5 combined with total energy efficiency = 2.5 + 3.5 = 6.0 is possible.

1 is a diagram showing a system diagram of Embodiment 1) of a heat pump system according to the present invention;

2 is a diagram showing a system diagram of Embodiment 2) of a heat pump system according to the present invention;

3 is a diagram showing a system diagram of Embodiment 3) of a heat pump system according to the present invention;

4 is a view showing a cycle diagram of a refrigeration air conditioning system according to the present invention

5 is a view showing a time-pressure diagram of a refrigeration air conditioning system according to the present invention;

Figure 6 is a view showing the pressure-consumption power of the refrigeration air conditioning system according to the present invention

7 is a schematic diagram of a conventional ice heat storage system.

Claims (5)

A compressor for compressing and discharging the refrigerant gas to a high temperature and high pressure state, a condenser for condensing the refrigerant compressed in the compressor to a liquid phase, and an expansion for expanding the high temperature and high pressure liquid refrigerant condensed in the condenser into a low pressure liquid refrigerant Evaporator and cold to return the low-temperature, low-pressure gaseous refrigerant gas to the compressor while achieving a freezing effect by heat exchange with the object to be cooled by using the latent heat of evaporation of the valve and the refrigerant expanded by the expansion valve. In the heat pump system comprising a four-sided for heating switching, Heat pump system 300 consisting of the compressor (1), four sides (5), outdoor unit (2), expansion valve (20), control valves (30, 31), hot water heat exchanger (3) and hot water pump (10) ; The hot water heat exchanger (4), hot water pump (11), hot water storage tank (8), cold heat exchanger (40) and cold, hot heat storage tank (7) to the heat storage and storage of hot water, cold heat and hot water, if necessary, Heat pump system characterized in that the heat storage system 400 is selectively operated. The hot water supply heat exchanger (4) and the control valve (38) between the outlet of the compressor (1) and the four sides (5) as shown in FIG. 1, and the hot water supply heat exchanger (4) and the hot water storage tank (7). Hot water pump 11 is attached between the control valves (30, 31, 39), heat storage tank (7), cold heat exchanger (40), hot water heat exchanger between the expansion valve (20) and the four sides (5). And a cool heat exchanger (40) attached to the inside of the heat storage tank (7), in which the refrigerant inside the cold heat exchanger (40) and external water directly exchange heat, and the control valve (30). ) And the hot water heat exchanger 3 and the control valve 39 between the four sides (5), the hot water heat exchanger (3) and the hot and cold heat storage tank (7) attached to the hot water pump (10) , Heat pump system characterized in that the system is made of a system in which the control valve 38 or the control valve (39) is selectively omitted, the control valve (30) or a system selectively omitting the control valve (31). 2. The hot water supply heat exchanger (4) and the control valve (38) between the outlet of the compressor (1) and the four sides (5) as shown in FIG. 2, and the hot water supply heat exchanger (4) and the hot water storage tank (7). The hot water pump 11 is attached between the two sides, the control valve 32, the cold storage tank 7 and the cold heat exchanger 40 between the expansion valve 20 and the four sides (5), 7) the cold heat exchanger 40 is attached to the inside of the inside, the cold heat exchanger 40 is used in combination with the evaporator and condenser, the control valve 38 or the control valve 32 is optionally omitted. Heat pump system characterized by the form made in one system. 3. The hot water supply heat exchanger 4 and the control valve 38 are located between the outlet of the compressor 1 and the four sides 5, as shown in FIG. The hot water pump 11 is attached between the control valve 39, the heat storage tank (7), the cold heat exchanger (40), the hot water heat exchanger (3) between the expansion valve 20 and the four sides (5). The refrigerant and the brine heat exchange in the hot water heat exchanger (3), the brine by the brine pump 10 is a form of heat exchange with the water of the heat storage tank (7) inside the cold heat exchanger (40), hot water heat exchanger Heat pump system, characterized in that the brine pump (10) is attached between the (3) and the heat storage tank (7), the control valve 38 or the control valve (39) is made of a system selectively omitted. The control valves 30, 31, 32, 38, and 39 according to claim 1, 2, 3, 4 are manufactured in the form of electromagnetic valves, check valves and solenoid valves for the purpose of controlling the flow of refrigerant. Heat pump system.

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