KR100877056B1 - Hybrid Heat Pump System - Google Patents

Abstract

A hybrid heat pump system is disclosed. Hybrid heat pump system according to an embodiment of the present invention, the outdoor unit; A cooling and cooling refrigerant circulation unit which is controlled by an indoor unit and a control unit to circulate the outdoor unit and the indoor unit; compressor; 4-way valve; Outdoor heat exchanger; Expansion valve; And an indoor heat exchanger continuously installed to selectively perform heating and cooling according to refrigerant flow switching, wherein the refrigerant is connected to the outdoor unit and the indoor unit to optimize the hot water supply efficiency by passing the refrigerant gas of the high temperature and high pressure of the compressor outlet through a hot water supply heat exchanger. Four refrigerant pipes; Two four-way valves for switching the refrigerant circuit; And a hot water heat exchanger through which refrigerant gas discharged from the compressor is circulated. According to this, not only can be used as a cooling and heating means by one unit, but also the hot water supply function is used in parallel, so that the versatility is excellent, and the cooling operation, the heating operation and the hot water operation are performed by one control unit. The usability is improved, and the hot water supply function can be used regardless of the heating and cooling operation, so that the user can always use warm hot water at a constant temperature.

Description

Hybrid heat pump system {HYBRID HEAT PUMP TYPE HEAT AND COOLING SYSTEM}

The present invention relates to a hybrid heat pump system, and in particular, by configuring four indoor and outdoor air connection pipes and two four-way valves, cooling and heating and hot water supply are not only selectively performed by simple refrigerant switching, but also cooling and hot water supply, and heating and The present invention relates to a hybrid heat pump system that not only allows a hot water supply to be operated as a single device but also significantly improves the hot water efficiency.

In general, the heat pump system is basically a cooling cycle and a heating cycle in the same unit, the cooling and heating are combined, one unit performs the cooling by the cooling cycle in the summer, the reverse cycle in the winter System to perform heating and hot water supply.

The heat pump air-conditioning system is composed of a heating and cooling system using a gas engine driven type (GHP; Gas Heat Pump), electric compression type (EHP; Electric Heat Pump), or ground source heat pumps (GSHPs). GHP, EHP and GSHPs are all made through the heat pump cycle circulation of the refrigerant.

In addition, the heat pump air-conditioning system is a system for cooling and heating at the same time by switching the low temperature to high temperature or the high temperature to low temperature through the bi-directional flow of the refrigerant, the heat pump air-conditioning system is a number of outdoor heat source equipment An indoor unit is connected, or a plurality of outdoor heat source devices are connected to one indoor unit, or one indoor unit and one outdoor heat source device are connected to each other.

Conventional heat pump air-conditioning system has a compressor, a four-way valve, an air heat exchanger, an expansion valve and an indoor unit connected by a refrigerant circulation circuit, while each indoor unit is provided with a plurality of expansion valves and a room temperature sensor and a plurality of indoor spaces. It has a configuration that is installed in, often, its own heat exchanger has a structure for evaporating or condensing the refrigerant by air cooling by the blowing of the outdoor fan.

However, the conventional heat pump type air-conditioning system has a problem that its versatility is greatly reduced since it does not have a hot water supply function by performing cooling or heating of the room through selective operation of an air conditioning cycle.

Meanwhile, in order to solve the problem of the heat pump system, heating and cooling systems in which hot water is supplied have been devised.

For example, patent registration No. 556791, a heat pump hot water supply device has been devised, which is a compressor, a radiator, a decompression unit, a heat absorber, the compressor, the radiator, the decompression unit, and the heat absorber in a closed circuit A heat pump cycle having a refrigerant flow path constituting a heat exchanger, a heat exchanger having a flow path for exchanging heat with the refrigerant flow path of the radiator, a water supply pipe for supplying tap water to the water flow path, and a flow of water from the water flow path to the hot water supply terminal A hot water supply pipe, a storage tank for storing hot water, a water circulation path formed by connecting the storage tank and the water flow path, hot water flowing out of the storage tank, and hot water from the water flow path to the hot water supply circuit. It is provided with a mixing unit for passing water, in the case of storing hot water, the hot water heated by the heat exchanger to the storage tank by the water circulation path It is to be stored.

As another example, Patent No. 54,362, a heating / cooling hot water supply system with a heat pump was devised. The compressor, the condenser, the expansion valve, and the evaporator were sequentially connected to form a refrigeration cycle, a compressor, and superheat heat exchange. Heat pump, four-way control valve, main heat exchanger, two-way expansion valve, auxiliary heat exchanger is connected in sequence to form a heating and cooling cycle, the hot water obtained by heat exchange between the condenser of the refrigerator and the superheat heat exchanger of the heat pump. And a heat medium circulating means for storing and circulating the hot water supply means for supplying and the low or high temperature heat medium obtained by heat exchange with the main heat exchanger of the heat pump for use in cooling and heating.

As described above, the conventional heating and cooling heat pumps to which hot water supply is supplied have an additional supply of hot water along with heating and cooling to greatly improve the usability. However, the supply of hot water is not smoothly performed, and the cooling efficiency of the hot water supply decreases or during cooling. Problems such as deterioration of hot water supply efficiency occur.

In addition, the refrigerant circulation is performed by the two indoor and outdoor air connection pipes and one four-way valve, so that the hot water supply efficiency is greatly reduced.

The present invention has been made to solve the problems of the conventional heating and cooling heat pump system, by four refrigerant pipes connecting the indoor unit and the outdoor unit, and the refrigerant circulation by the two four-way valve, the simple refrigerant switching As well as cooling, heating and hot water supply, as well as cooling and hot water supply, heating and hot water supply can be used in parallel, and a hybrid having a hot water supply function to prevent the hot water supply efficiency from being lowered when mixing cooling and heating and hot water supply. The purpose is to provide a heat pump system.

As a means for achieving the above object, the hybrid heat pump system of the present invention includes an outdoor unit, a refrigerant circulating unit for cooling and heating circulating the outdoor unit and an indoor unit controlled by control of an indoor unit and a control unit, a compressor, a four-way valve, and outdoor heat exchange. Air conditioner, expansion valve and indoor heat exchanger are continuously installed to selectively perform heating and cooling according to the refrigerant flow switching, the outdoor unit to optimize the hot water supply efficiency by passing the high-temperature, high-pressure refrigerant gas from the compressor outlet to the hot water supply heat exchanger Four refrigerant pipes connecting the indoor unit; Two four-way valves for switching the refrigerant circuit; It further comprises a hot water supply heat exchanger for circulating the refrigerant gas discharged from the compressor.

The four refrigerant pipes include: a first refrigerant pipe guiding refrigerant gas discharged from the compressor to a hot water heat exchanger side; A second refrigerant pipe configured to circulate the refrigerant gas induced to the hot water heat exchanger side by the first refrigerant pipe to the outdoor unit side; A third refrigerant pipe circulating the refrigerant gas circulated to the outdoor unit by the second refrigerant pipe to the indoor heat exchanger side; And a fourth refrigerant pipe circulating the refrigerant gas circulated to the indoor heat exchanger to the outdoor heat exchanger.

The hot water supply heat exchanger may include: a heat exchange tube connected to an inflow pipe through which direct water supplied from a tap water flows in and a direct discharge water flowing through the inflow pipe to supply a hot water supply to a user; A heat storage tank in which heat storage water is received; Two inlet pipes connected to an upper portion and a middle portion of the heat storage tank and opened and closed by an on / off valve and heat exchanged by a plate heat exchanger connected to the first refrigerant pipe to supply heat storage water to the inside of the heat storage tank; It may be configured as a heater for heating the heat storage water received in the heat storage tank.

Hybrid heat pump system of the present invention, not only can be used as a cooling and heating means by one unit, but also to be used in parallel with the hot water supply function to have excellent versatility, and the cooling operation, heating operation and hot water operation is one control unit In order to improve the usability by using, and the hot water supply function can be used regardless of the heating and cooling operation, the user can always use the warm hot water of a constant temperature.

Furthermore, four connection pipes for circulating the refrigerant gas by connecting the indoor unit and the outdoor unit, and two four-way valves make cooling and heating, heating and cooling / hot water supply, and heating / hot water supply efficient by simple refrigerant changeover. Is increased.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings, and the terminology or words used in the specification and claims are used to explain the invention in its best way. Based on the principle that the concept of can be properly defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

1 to 5 are each a configuration diagram showing a configuration example of the hybrid heat pump system of the present invention.

As shown, the hybrid heat pump system of the present invention includes an outdoor unit, a refrigerant circulation unit for cooling and heating, which is controlled by control of an indoor unit and a control unit, and circulates the outdoor unit and an indoor unit, a compressor, a four-way valve, an outdoor heat exchanger, and an expansion valve. And an indoor heat exchanger continuously installed to selectively perform heating and cooling according to the refrigerant flow switching, wherein the outdoor unit is configured to optimize the hot water supply efficiency by passing the high-temperature, high-pressure refrigerant gas at the outlet of the compressor (1) to the hot water supply heat exchanger. ) Four refrigerant pipes (100) connecting the indoor unit (3), two four-way valves (110) and (120) for switching the refrigerant circuit, and a hot water heat exchange in which refrigerant gas discharged from the compressor (1) is circulated. It consists of a group 200.

The four refrigerant pipes 100 include a first refrigerant pipe 101 for guiding the refrigerant gas discharged from the compressor 1 toward the hot water supply heat exchanger 200, and a hot water supply by the first refrigerant pipe 101. The refrigerant gas circulated to the outdoor unit 2 by the second refrigerant pipe 102 and the second refrigerant pipe 102 to circulate the refrigerant gas guided to the heat exchanger 200 side to the outdoor unit 2 side. And a third refrigerant pipe 103 circulating to the indoor heat exchanger 4 side, and a fourth refrigerant pipe 104 to circulate the refrigerant gas circulated to the indoor heat exchanger 4 to the outdoor heat exchanger 5 side. .

In addition, the hot water supply heat exchanger 200, the inlet pipe 211 through which the direct water supplied from the tap water flows in and the discharge pipe 212 through which the direct water introduced from the inlet pipe 211 is discharged to supply the hot water supply to the user. Heat exchange tube 213 is connected to the heat exchange, the heat storage tank 214, the heat storage water is accommodated therein, and the upper and middle portions of the heat storage tank 214, respectively, is opened and closed by an opening and closing valve and the first refrigerant pipe Two inlet pipes 216 and 216 which are heat-exchanged by the plate heat exchanger 215 connected to the 101 and supply the heat storage water to the heat storage tank 214, and accommodated inside the heat storage tank 214. It consists of the heater 217 which heats the heat storage water which becomes.
However, the hot water heat exchanger 200 according to the present invention does not need to be particularly limited to the above-described configuration, and as shown in FIG. 3, the heat storage tank 221 and the heat storage tank 221 are charged inside the heat storage tank 221. An inlet pipe into which one side is inserted into the zigzag-type pipe connection part 222 connecting the end of the first refrigerant pipe 101 and the end of the second refrigerant pipe 102 and the heat storage tank 221 to inject the direct water into the pipe ( 223 and the discharge tube 224 for discharging the hot water and the zigzag connection tube 225 for connecting the inlet tube 223 and the discharge tube 224 may be configured. Here, the discharge pipe 224 is preferably directly connected to the heat storage tank 221.
In addition, as shown in FIG. 5, the hot water supply heat exchanger 200 includes an inlet pipe 231 through which direct water flows, a discharge pipe 232 through which hot water is discharged, an inlet pipe 231, and a discharge pipe ( It is installed along the outside of the zigzag heat exchanger 233 and the zigzag heat exchanger 233 connecting 232 to heat the direct water flowing from the inlet pipe 231, the first refrigerant pipe 101 and the second refrigerant The pipe 102 may be composed of a double heat exchanger 234 connected to each other.
The inlet pipe 211 and the discharge pipe 212, which are charged into the heat storage tank 214 of the hot water heat exchanger 200, are not connected to each other by a connection pipe, but are independent of each other and directly inside the heat storage tank 214. One side may be charged.

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Hybrid heat pump system of the present invention configured as described above, the cooling and hot water supply, heating and hot water supply, as well as the cooling, heating, hot water supply is operated separately, so that the user can select and use the required operation as well as improve the versatility outdoor unit The hot water supply efficiency is greatly improved by the four refrigerant pipes 100 connecting the indoor unit 3 and the indoor unit 3.

The hybrid heat pump system having a hot water supply function of the present invention is controlled by a microcomputer controller (not shown) provided in an indoor unit, and when a user selects and operates a cooling and hot water mode, the cooling mode and the hot water mode are simultaneously operated. When the cooling and hot water supply function is performed at the same time, when the indoor temperature reaches the set desired temperature, it is switched to the hot water alone mode, and when the water temperature of the heat storage tank reaches the desired temperature, it is automatically switched to the cooling alone mode and operated. When both functions reach the set temperature, both modes will switch to standby mode.

In addition, the present invention hybrid heat pump system having a hot water supply function, the heating and hot water supply function can be operated at the same time by the microcomputer controller provided in the indoor unit, when the user selects and drives the heating and hot water supply function of the room heating and hot water supply When the supply temperature is in progress, when the indoor temperature reaches the set temperature, it is switched to the hot water supply alone mode. When the water temperature of the heat storage tank reaches the set temperature, it is switched to the heating alone mode. Both modes are switched to standby mode.

In the cooling operation of the hybrid heat pump system having the hot water supply function of the present invention, as shown in FIG. 6, the high-temperature, high-pressure refrigerant gas discharged from the compressor 1 passes through the first refrigerant pipe 101 and the four-way valve 110. By the heat exchanger (5), heat dissipates and condensates the liquid, passes through the expansion mechanism of the indoor unit (3), thermally expands with low temperature low pressure liquid, and then flows into the evaporator to suck heat from the air in the room The phase change into the gas passes through the four-way valve 120 and the cycle flowing back into the compressor 1 is repeated.

In addition, the heating operation, as shown in Figure 7, after the high-temperature, high-pressure refrigerant gas discharged from the compressor 1 is introduced into the hot water supply heat exchanger 200 of the indoor unit 3 through the first refrigerant pipe 101 The heat exchanger 4 is installed in the indoor unit 3 by switching the four-way valves 110 and 120 after passing through the second refrigerant pipe 102 to condense and condensate the liquid. By heating the room is heated. In addition, the condensed refrigerant gas is introduced into the receiver of the outdoor unit 2 by switching the four-way valve 110 after passing through the fourth refrigerant pipe 104, and thermally expands into a low temperature low pressure liquid through the outdoor expansion mechanism. In addition, the outdoor heat exchanger 5 sucks external heat to change phase into a low temperature low pressure gas, and then passes through the four-way valve 120 to the compressor 1 again.

Hot water supply operation of the hybrid heat pump system of the present invention is made by the hot water heat exchanger 200, as shown in Figure 8, the direct water flowing through the inlet pipe 211 in the heat storage tank 214 Heat exchange is performed in the process of circulating through the discharge tube 212 and the heat exchange tube 213 connecting them, and at this time, the heat exchange tube 213 is indirectly heat exchanged inside the heat storage tank 214 to the heater ( Hot water supply is supplied by the internal heat storage water of the heat storage tank 214 warmed by 217.

In the hot water circulation operation of the hybrid heat pump system of the present invention, the refrigerant gas discharged from the compressor 1 passes through the first refrigerant pipe 101 and the plate heat exchanger of the hot water heat exchanger 200 of the indoor unit 3 ( After passing through the water supply tank 216 is inserted into the heat storage tank 214 while passing through the 215, the hot water is manufactured, and then condensed into liquid and adiabatic expansion with low temperature and low pressure liquid in the expansion mechanism of the indoor unit 3 After passing through the second refrigerant pipe 102, the four-way valve 110 is introduced into the evaporator and absorbed from the air in the room to change into a low-temperature low-pressure gas, and then the compressor is switched by the four-way valve 120 again. It enters and circulates in (1).

Refrigerant circulation in the cooling / hot water operation of the hybrid heat pump system of the present invention, as shown in Figure 9, the refrigerant gas discharged from the compressor (1) passes through the first refrigerant pipe 101, the hot water heat exchange of the indoor unit (3) After the hot water is produced in the gas 200, it is condensed and passed through the second refrigerant pipe 102 and the four-way valve 110 and adiabatic expansion with low-temperature low-pressure liquid in the expansion mechanism of the indoor unit 3, and then introduced into the evaporator After the phase change from the air to the low temperature low pressure gas, the four-way valve 120 is passed through the inlet into the compressor (1).

In addition, the refrigerant circulation in the heating / hot water operation of the hybrid heat pump system of the present invention, as shown in Figure 10, the refrigerant gas discharged from the compressor (1) passes the first refrigerant pipe 101 of the indoor unit (3) After the hot water is produced in the hot water heat exchanger 200, the condensate is liquefied, and the second refrigerant pipe 102 and the four-way valve 110 pass through the four-way valve 120 of the outdoor unit 2 to be converted into a third refrigerant pipe ( The air temperature is increased in the indoor heat exchanger (4) of the indoor unit (3) after passing through 103, and condensed secondly, and then is introduced into the receiver of the outdoor unit (2) through the fourth refrigerant pipe (104). After thermal expansion and expansion with low temperature low pressure liquid through the expansion mechanism, the outdoor heat exchanger (5) absorbs the heat of the outside air and changes the phase into a low temperature low pressure singer, and then circulates into the compressor by switching of the four-way valve (120). This is done.

In the defrosting operation of the hybrid heat pump system of the present invention, the refrigerant gas discharged from the compressor radiates from the outdoor heat exchanger (5) to the outdoor heat exchanger (5) through the hot water heat exchanger (200) of the indoor unit (3). ), And after condensing and condensing into the indoor unit (2), passing through the indoor expansion mechanism, adiabatic expansion with low temperature low pressure liquid, and absorbing heat from the indoor heat exchanger (4) to change phase into low temperature low pressure gas, This is done by circulation entering the compressor.

The hybrid heat pump system of the present invention is capable of various modifications in addition to those shown and described, so that the embodiments to be modified should all be included in the scope of the present invention without departing from the scope of the present invention.

1 is a configuration diagram showing the configuration of the hybrid heat pump system of the present invention.

2 is a configuration diagram showing another example of the hybrid heat pump system of the present invention.

Figure 3 is a block diagram showing another example of the hybrid heat pump system of the present invention.

Figure 4 is a block diagram showing another example of the hybrid heat pump system of the present invention.

5 is a configuration diagram showing another example of the hybrid heat pump system of the present invention.

6 is a block diagram showing a refrigerant flow during the cooling operation by the hybrid heat pump system of the present invention.

Figure 7 is a block diagram showing the refrigerant flow during the heating operation by the present invention hybrid heat pump system.

8 is a block diagram showing a refrigerant flow during hot water supply operation by the hybrid heat pump system of the present invention.

9 is a block diagram showing a refrigerant flow during the cooling / hot water operation by the hybrid heat pump system of the present invention.

10 is a block diagram showing a refrigerant flow during the heating / hot water operation by the hybrid heat pump system of the present invention.

<Description of the symbols for the main parts of the drawings>

1: compressor 2: outdoor unit

3: indoor unit 4: indoor heat exchanger

5: outdoor heat exchanger

100: refrigerant piping 101: first refrigerant piping

102: second refrigerant piping 103: third refrigerant piping

104: fourth refrigerant piping 110, 120: four-way valve

200: hot water supply heat exchanger 211, 223, 231: inlet pipe

212, 224, 232: discharge tube 213: heat exchanger tube

214, 221: heat storage tank 215: plate heat exchanger

216: water supply pipe 217: heater

222: pipe connection 225: connector

233: heat exchanger 234: double heat exchanger

Claims (7)

Outdoor unit; A cooling and cooling refrigerant circulation unit which is controlled by an indoor unit and a control unit to circulate the outdoor unit and the indoor unit; compressor; 4-way valve; Outdoor heat exchanger; Expansion valve; In the air-conditioning system and the indoor heat exchanger is installed continuously to selectively perform cooling and heating according to the refrigerant flow switching, Four refrigerant pipes (100) connecting the outdoor unit (2) and the indoor unit (3) to optimize the hot water supply efficiency by passing the high temperature and high pressure refrigerant gas at the outlet of the compressor (1) through the hot water supply heat exchanger; Two four-way valves 110 and 120 for switching the refrigerant circuit; And And a hot water supply heat exchanger 200 through which refrigerant gas discharged from the compressor 1 is circulated. The four refrigerant pipes 100, A first refrigerant pipe (101) for guiding the refrigerant gas discharged from the compressor (1) to the hot water supply heat exchanger (200) side; A second refrigerant pipe (102) configured to circulate the refrigerant gas guided to the hot water heat exchanger (200) by the first refrigerant pipe (101) to the outdoor unit (2); A third refrigerant pipe 103 circulating the refrigerant gas circulated to the outdoor unit 2 by the second refrigerant pipe 102 to the indoor heat exchanger 4 side; And a fourth refrigerant pipe (104) for circulating the refrigerant gas circulated to the indoor heat exchanger (4) to the outdoor heat exchanger (5) side. delete The method of claim 1, The hot water supply heat exchanger 200, The heat exchanger tube 213 is connected to the heat exchanger tube 211 is connected to the inlet pipe 211 is introduced into the direct flow water supplied from the tap water and the discharge pipe 212 to supply the hot water supply to the user is discharged ; A heat storage tank 214 having heat storage water received therein; The heat storage water is connected to the upper and middle portions of the heat storage tank 214 and opened and closed by an on / off valve and heat-exchanged by the plate heat exchanger 215 connected to the first refrigerant pipe 101 to store the heat storage water in the heat storage tank 214. Two inlet pipes 216 and 216 for supplying the same; And And a heater (217) for heating the heat storage water received in the heat storage tank (214). The method of claim 3, wherein The inlet pipe 211 and the discharge pipe 212, which are charged into the heat storage tank 214 of the hot water heat exchanger 200, are not connected to each other by a connection pipe, but are independent of each other and directly inside the heat storage tank 214. Hybrid heat pump system, characterized in that the one side is charged. The method of claim 1, The hot water supply heat exchanger 200, Heat storage tank 221; A zigzag pipe connection portion 222 charged into the heat storage tank 221 and connecting the end of the first refrigerant pipe 101 to the end of the second refrigerant pipe 102; An inlet pipe 223 into which one side is charged into the heat storage tank 221 and direct water flows in, and a discharge pipe 224 in which hot water is discharged; And Hybrid heat pump system comprising a; zigzag connection pipe 225 for connecting the inlet pipe 223 and the discharge pipe 224. The method of claim 5, Hybrid heat pump system, characterized in that the inlet pipe 223 for the direct flow of the hot water supply heat exchanger 200 and the discharge pipe 224 for discharging the hot water is directly connected to the heat storage tank (221). The method of claim 1, The hot water supply heat exchanger 200, An inflow pipe 231 into which direct water flows; A discharge tube 232 through which hot water is discharged; A zigzag heat exchanger 233 connecting the inlet 231 and the outlet 232 to each other; And A double heat exchanger installed along the outside of the zigzag heat exchanger 233 to heat-exchange direct water flowing from the inlet pipe 231 and to which the first refrigerant pipe 101 and the second refrigerant pipe 102 are respectively connected. Hybrid heat pump system, characterized in that consisting of (234).

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