KR100866737B1 - Hybrid heat pump type heat and cooling system with feeding steam water - Google Patents

Abstract

A hybrid heat pump system is provided to use as a cooling and heating unit with one unit and to improve usability by performing a cooling, a heating, and a boiling with one unit. A hybrid heat pump system comprises a water boiling heat exchanger(100), a endothermic pipe(210), a endothermic control valve(220), an inlet tube(111) in which the water of faucet is directly flowed, a discharge tube(112) in which the feeding water flowed in from the inlet tube is discharged, a heat storage tank(110) in which the regenerative water is stored, and a heater(130) heating up the regenerative water in the heat storage tank. The endothermic pipe which connects the refrigeration circulation part and heat storage tank so that the refrigerant circulating according to the refrigeration circulation part of cooling and heating system pass through the heat storage tank inside of the water boiling heat exchanger. The endothermic control valve which is installed at the endothermic pipe controls the flow of refrigerant. The endothermic control valve is automatically controlled so that the heat is discharged after absorbing the heat from the regenerative water of the heat storage tank when the refrigerant passes through the endothermic pipe in defrosting.

Description

Hybrid heat pump system with hot water function {HYBRID HEAT PUMP TYPE HEAT AND COOLING SYSTEM WITH FEEDING STEAM WATER}

The present invention relates to a hybrid heat pump system, and more particularly, a heat pump system having a cooling cycle and a heating cycle is further provided with a hot water supply heat exchanger to selectively perform cooling and heating and hot water supply, as well as cooling and hot water supply, and heating. The present invention relates to a hybrid heat pump system having a hot water supply function, in which a super hot water supply can be performed at the same time.

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 indoor units in one outdoor heat source supply equipment 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.

The present invention has been made to solve the problems of the conventional heating and cooling heat pump system, further comprising a hot water supply heat exchanger that is directly or indirectly water-circulated on one side of the indoor unit, as well as cooling, heating and hot water supply by one unit, It is an object of the present invention to provide a hybrid heat pump system having a hot water supply function, which can be used in combination with cooling and hot water supply, heating and hot water supply, and also prevents a decrease in function when mixing cooling and heating and hot water supply. .

Hybrid heat pump system having a hot water supply function of the present invention as a means for achieving the above object, the outdoor unit, the indoor unit is controlled by a control unit, along the refrigerant and cooling refrigerant circulation unit for circulating the outdoor unit and the indoor unit compressor, four-way valve, outdoor In a cooling and heating system in which a heat exchanger, an expansion valve, and an indoor heat exchanger are continuously installed to selectively perform cooling and heating according to the refrigerant flow switching of the four-way valve, an inflow pipe into which direct water from a tap water flows in and an inflow pipe from the inflow pipe A hot water supply heat exchanger having a heat exchanger tube in which heat is supplied indirectly and the heat exchanger tube indirectly exchanged with the discharge pipe discharged again, and a heat storage tank in which heat storage water is received, and a heater accommodated in the heat storage tank to heat the heat storage water; The refrigerant circulating along the refrigerant circulation is inside the heat storage tank of the hot water heat exchanger. An endothermic tube connecting the refrigerant circulation portion and the heat storage tank to each other so as to pass therethrough; And an endothermic control valve installed in the endothermic tube to control the flow of the refrigerant, and supplementing the defrost endothermic amount of the refrigerant according to the operation of the temperature sensor provided in the suction low pressure tube of the refrigerant circulation part of the outdoor heat exchanger. The endothermic control valve is automatically controlled to absorb the heat from the heat storage water of the heat storage tank in the process of passing through the heat absorbing tube during the defrost, and then discharged automatically.

One side of the indoor heat exchanger of the indoor unit may be further provided with a heating auxiliary heater for inducing a rise in the room temperature during heating.

Hybrid heat pump system having a hot water supply function of the present invention configured as described above can not only be used as a cooling and heating means by a single unit, but also by using a hot water supply function in parallel to provide excellent versatility, cooling operation and heating Operation and hot water operation is performed by one control unit to improve usability, 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.

Further, the temperature of the hot water supply function is lowered during the cooling operation or the temperature of the cooling is not increased by the hot water supply operation, thereby making it possible to perform an efficient heating and heating cycle.

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 is a block diagram showing the configuration of a hybrid heat pump system having a hot water supply function of the present invention, Figure 2 is a conceptual diagram showing the control of a hybrid heat pump system having a hot water supply function of the present invention, Figure 3 is a hot water supply function of the present invention It is a block diagram which shows the other structure of a hybrid heat pump system, and FIG. 4 is a block diagram which shows cooling and a hot water operation by the hybrid heat pump system which has the hot water supply function of this invention.

As shown, the hybrid heat pump system having a hot water supply function according to the present invention includes an outdoor unit 10 and an indoor unit 20 controlled by a control unit, and a refrigerant circulation unit for cooling / heating that circulates the outdoor unit 10 and the indoor unit 20. Accordingly, the compressor (1), the four-way valve (2), the outdoor heat exchanger (3), expansion valve (4) and the indoor heat exchanger (5) are continuously installed to select the cooling and heating according to the refrigerant flow switching of the four-way valve As a cooling and heating system performed by the heat exchanger, the heat exchanger tube indirect heat exchange by connecting the inlet pipe 111 through which the direct water of the tap water is introduced and the discharge pipe 112 discharged again from the inlet pipe 111 is discharged again Hot water heat exchanger (100) having a heat storage tank 110, the heat storage tank 110, the heat storage water accommodated inside the heat storage tank 110, and the refrigerant circulation unit Refrigerant circulating through the heat storage tank (110) The refrigerant circulation unit and the heat storage tank 110 are connected to each other so as to pass therethrough, and a portion of the heat absorption tube 210 and the refrigerant introduced into the heat storage tank 110 of the hot water heat exchanger 100 are stored in the heat storage tank ( It further comprises an endothermic control valve 220 for controlling the refrigerant flow of the heat absorbing tube 210 so as to absorb heat from the heat storage water while passing through 110.

The inflow pipe 111 connected to the heat exchange pipe 113 provided in the heat storage tank 110 is directly supplied with water from the tap water, and is obtained from the heat storage tank 110 generated during the hot water supply operation. The hot water is supplied to the user through the discharge pipe 112 by heat-exchanging with the heat storage water.

In addition, the heat absorbing pipe 210 is configured to flow into the inner side of the heat storage tank 110 to circulate the inner side of the heat storage tank 110, and the high temperature and high pressure refrigerant gas circulated through the refrigerant circulation part is the heat storage tank. It condenses and liquefies by exchanging heat with internal heat storage water.

One side of the indoor heat exchanger 5 of the indoor unit 20 is further provided with a heating auxiliary heater 230 to induce an increase in the room temperature during heating.

The heating auxiliary heater 230 is electrically connected to supply heat as a heating heater by itself when the control unit is heated. The heating air from the fan of the indoor unit 20 is heated by the heating auxiliary heater 230. In blowing, heating efficiency is greatly improved.

In addition, as shown in FIG. 3, the inflow pipe 111 and the discharge pipe 112 are not connected by a connection pipe, and one side of each of the inflow pipes 110 is directly connected to the inside of the heat storage tank 110 to directly connect the inflow pipe. Direct water flowing into the heat storage tank 110 through the 111 may be directly heat-exchanged by the heat storage water inside the heat storage tank 110 to supply the hot water to the user through the discharge pipe 112. have.

Hybrid heat pump system having a hot water supply function of the present invention configured as described above, as shown in Figure 4, as well as cooling, heating, hot water is operated separately, so that the user can select and use the required operation Versatility is improved. In addition, although not shown, it may be operated by heating and hot water supply as described below.

In the heat storage tank 110 is further provided with a water temperature sensor 140 for detecting the water temperature inside the heat storage tank 110 to set the operation of the heater 130, the water temperature sensor 140 The heat transfer time of the heater 130 is determined by detecting the water temperature.

In addition, one side of the hot water supply heat exchanger (100) is further provided with a bypass valve 150 for controlling the flow of the refrigerant to prevent the temperature of the hot water of the hot water at the time of cooling, which is circulated when using the cooling and hot water at the same time Since the refrigerant does not go through the hot water supply heat exchanger 100, the interference due to the endotherm from the heat storage water does not occur, thereby preventing the cooling efficiency from being lowered. In addition, the hot water supply can be made by the heater 130 alone.
Of course, the bypass valve 150 may be used to separate the cooling and hot water from each other as described above. However, the cooling and hot water supply may be performed while taking some degree of efficiency reduction during cooling due to the interference of the refrigerant. It will be apparent to those skilled in the art that the supply could be done at the same time.

The hybrid heat pump system having a hot water supply function of the present invention configured as described above is controlled by a microcomputer controller (not shown) provided in an indoor unit, and when the user selects and operates the cooling and hot water mode, the cooling mode and the hot water mode operate simultaneously. In this way, when the cooling and hot water supply function is performed at the same time, when the indoor temperature reaches the desired temperature, it is switched to the hot water only 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 cooling and hot water supply reach the set temperature, both modes are switched 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 of the hybrid heat pump system having the hot water supply function according to the present invention configured as described above, after the refrigerant gas discharged from the compressor 1 is radiated by the outdoor heat exchanger 3 to condense the liquid, the sap outlet of the indoor unit 20 is discharged. Adiabatic expansion with low temperature low pressure liquid through the indoor expansion valve (4) in the air, flows into the indoor heat exchanger (5), inhales heat from the air in the room, and changes phase into low temperature low pressure gas to supply hot water in the hot water supply heat exchanger. In order to prevent a drop in temperature, a cycle that is bypassed by the bypass valve 150 and passes through the four-way valve and flows back into the compressor 1 is repeated.

In addition, the heating of the refrigerant gas discharged from the compressor (1) bypasses the hot water supply heat exchanger (100) installed in the indoor unit (20) to dissipate the heat in the indoor heat exchanger (5), and condensation heat is blown at this time. Inflowing into the room is achieved by heating the room. In addition, the condensed refrigerant gas is introduced into the receiver of the indoor unit, and is adiabaticly expanded with a low temperature low pressure liquid through the outdoor expansion valve (4), and then sucks external heat from the outdoor heat exchanger (3) to form a low temperature low pressure gas. After the change, the cycle flowing through the four-way valve (2) again into the compressor (1) is repeated.

Hot water supply by the hybrid heat pump system having a hot water supply function of the present invention is made by the hot water supply heat exchanger 100, the supply water stored in the heat storage tank 110, the inlet pipe 111 and the discharge pipe 112. ) And the heat exchange pipe 113 connecting them to be circulated. At this time, the heat exchange pipe 113 is indirectly heat-exchanged inside the heat storage tank 110 to be heated by the heater 130. Hot water supply is supplied by the internal heat storage water of).

In addition, as shown in FIG. 3, when the inflow pipe 111 and the discharge pipe 112 are directly connected to the inside of the heat storage tank 110, the heat storage tank 110 is connected to the heat storage tank 110 through the inflow pipe 111. Supply water introduced into the inside is heat-exchanged in the heat storage tank 110 is discharged through the discharge pipe 112 is supplied with hot water supply.

When cooling is operated while the hot water is supplied in this way, the refrigerant circulated by the bypass valve 150 does not interfere with the hot water heat exchanger 100, thereby increasing the heat exchange efficiency of the hot water heat exchanger 100. Regardless of cooling, the user can receive hot water at the required temperature.

In addition, since the refrigerant circulated by the bypass valve 150 is prevented from interfering with the hot water supply heat exchanger, deterioration of the refrigerant efficiency of the refrigerant cycle may be prevented, and thus the indoor cooling effect is not reduced.

In addition, the hybrid heat pump system having a hot water supply function of the present invention, when the defrost heat absorption amount needs to be supplemented at the time of defrosting, the heat amount of the heat storage tank 110 is supplied to the refrigerant by the temperature sensor of the compressor (1) suction low pressure pipe. The endothermic control valve 220 controls the solenoid valve line during the defrosting operation so that the refrigerant passes only through the endothermic tube 210 of the lower side, so that the temperature of the heat storage water in the heat storage tank 110 is maintained. At the same time, the coolant is kept in the heat storage tank even when the coolant cannot perform defrosting of the outdoor heat exchanger 3 due to insufficient endothermic amount of the air heat source in the indoor heat exchanger 5 during the defrosting operation. It absorbs heat from the regenerative water of 110) and automatically compensates for the defrost.

Hybrid heat pump system having a hot water supply function of the present invention is capable of various modifications in addition to those shown and described as long as it does not depart from the scope of the present invention, all modified embodiments should be included in the scope of the present invention to be interpreted. do.

1 is a block diagram showing the configuration of a hybrid heat pump system having a hot water supply function of the present invention.

Figure 2 is a conceptual diagram showing the control of the hybrid heat pump system having a hot water supply function of the present invention.

Figure 3 is a block diagram showing another configuration of the hybrid heat pump system having a hot water supply function of the present invention.

Figure 4 is a block diagram showing the cooling and hot water operation is performed by the hybrid heat pump system having a hot water supply function of the present invention.

5 is a block diagram showing the heating and hot water supply operation is performed by the hybrid heat pump system having a hot water supply function of the present invention.

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

1: compressor 2: four-way valve

3: outdoor heat exchanger 4: expansion valve

5: indoor heat exchanger

10: outdoor unit 20: indoor unit

100: hot water heat exchanger

110: heat storage tank 111: inlet pipe

112 discharge tube 113 heat exchanger tube

130: heater 140: water temperature sensor

150: bypass valve

210: endothermic tube 220: endothermic control valve

230: heating auxiliary heater

Claims (5)

An outdoor unit and an indoor unit are controlled by a control unit, and a compressor, a four-way valve, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger are continuously installed along the cooling / heating refrigerant circulation unit circulating the outdoor unit and the indoor unit to coolant flow switching of the four-way valve. In the cooling and heating system to selectively perform the heating and cooling according to, An inlet pipe into which direct water from the tap water flows in and a discharge pipe in which the feed water introduced from the inlet pipe is discharged again are connected to the heat exchange tube indirectly exchanging heat, a heat storage tank accommodating the heat storage water, and the inside of the heat storage tank A hot water supply heat exchanger having a heater for heating the heat storage water; An endothermic tube connecting the refrigerant circulation portion and the heat storage tank to each other so that refrigerant circulating along the refrigerant circulation portion of the cooling and heating system passes through the heat storage tank of the hot water heat exchanger; And It is provided in the endothermic tube and has an endothermic control valve for controlling the flow of the refrigerant, According to the operation of the temperature sensor provided in the suction low pressure pipe of the refrigerant circulation part, the endothermic amount of the refrigerant is compensated for so that the defrost of the outdoor heat exchanger is automatically paralleled. Hybrid heat pump system having a hot water supply function characterized in that the automatic control to absorb the heat from the heat storage water of the heat storage tank and then discharged. The method of claim 1, One side of the indoor heat exchanger of the indoor unit is a hybrid heat pump system having a hot water supply function, characterized in that the heating auxiliary heater is further provided to induce an increase in the room temperature during heating. The method of claim 1, The inlet pipe and the discharge pipe is directly connected to the heat storage tank is a hybrid heat pump system having a hot water supply function, characterized in that the heat exchange directly in the heat storage tank. The method of claim 1, The inside of the heat storage tank is a hybrid heat pump system having a hot water supply function, characterized in that the water temperature sensor for setting the operation of the heater by sensing the water temperature inside the heat storage tank is further provided. The method of claim 1, One side of the hot water supply heat exchanger is a hybrid heat pump system having a hot water supply function, characterized in that the bypass valve for controlling the flow of the refrigerant to further prevent the temperature of the hot water of the hot water during cooling operation is further provided.

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