KR100877055B1 - Hybrid heat pump type heat and cooling system with feeding steam water - Google Patents

Abstract

A hybrid heat pump system having a hot water supply function is provided to maintain constant temperature of hot water by performing the hot water supply function in both the heating and cooling modes. A hybrid heat pump system having a hot water supply function comprises a double pipe heat exchanger(100) which is installed inside an indoor unit(20) and supplies hot water by the heat condensation, a refrigerant control valve which is installed in a refrigerant circulation part(30) in order to make the refrigerant gas directly supplied to the double pipe heat exchanger in the hot water supply mode, and a defrost valve which is installed in a second circulating pipe(120) in order to make the refrigerant gas exhausted in the defrosting mode.

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 specifically, a heat pump system in which a cooling cycle and a heating cycle are further provided with a hot water supply heat exchanger to selectively perform cooling, heating, and hot water supply, as well as cooling and hot water supply, and The present invention relates to a hybrid heat pump system having a hot water supply function capable of simultaneously heating and hot water supply.

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 heating and cooling according to the refrigerant flow switching of the four-way valve, the refrigerant gas discharged from the compressor is circulated and condensed. And a double tube heat exchanger configured to supply hot water by condensation heat is further included in the indoor unit.

The double tube heat exchanger may include: a first circulation pipe having a discharge part for discharging hot water and an inlet part for direct water flow respectively connected to one side; The second circulation pipe is provided on the inner side of the first circulation pipe to circulate the heat of condensation of the refrigerant circulation portion.

One side of the indoor heat exchanger is characterized in that the heating auxiliary heater is further provided when the heating operation.

One side of the double heat exchanger may be further provided with a water temperature sensor for sensing the water temperature of the double heat exchanger to control the operation of the compressor.

The refrigerant circulation unit connected to the compressor may further include a temperature sensor for sensing a temperature discharged from the compressor.

In addition, the refrigerant circulation unit circulating the double heat exchanger may further include a bypass valve for preventing interference of the circulating refrigerant.

The hybrid heat pump system having a hot water supply function of the present invention having the above-described features can be used not only as a cooling and heating means by one unit, but also by using a hot water supply function in parallel to provide excellent versatility and cooling operation. The heating 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 according to the present invention, Figure 2 is a conceptual diagram showing the control of a hybrid heat pump system having a hot water supply function according to the present invention.

As shown in the present invention, the hybrid heat pump system having a hot water supply function 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. A compressor (1), a four-way valve (2), an outdoor heat exchanger (3), an expansion valve (4) and an indoor heat exchanger (5) are continuously installed along the (30) to cool the refrigerant of the four-way valve (2). The cooling and heating system for selectively performing the cooling and heating according to the flow switching, the refrigerant pipe discharged from the compressor (1) is connected to the refrigerant circulation unit 30 is condensed and condensed double pipe to supply the hot water supply by the heat of condensation The heat exchanger 100 is further configured inside the indoor unit 20.

The double tube heat exchanger 100 may include a first circulation pipe 110 connected to one side of a discharge part 111 through which hot water is discharged, an inflow part 112 through which direct water flows, and the first circulation pipe 110. It is provided on the inner side of the second circulation pipe 120 is configured to circulate the heat of condensation of the refrigerant circulation unit 30.

In addition, one side of the indoor heat exchanger 20 is further provided with a heating auxiliary heater 200 which is operated at the time of heating operation.

Hybrid heat pump system having a hot water supply function 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 through a single control unit as shown in FIG. Versatility is improved by selecting and using the operation.

One side of the double heat exchanger 100 is further provided with a water temperature sensor 130 for sensing the water temperature of the double heat exchanger 100 to control the operation of the compressor (1).

In addition, the refrigerant circulation unit 30 connected to the compressor 1 may be further provided with a temperature sensor 40 for detecting the temperature discharged from the compressor (1).

In addition, the refrigerant circulation unit 30 circulating the double heat exchanger 100 may further include a bypass valve 50 to prevent interference of the circulating refrigerant.

The bi-fabric valve 50 prevents the temperature drop and freezing of the water in the double heat exchanger 100 during the cooling operation.

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 drives the cooling and hot water mode, the cooling mode and the hot water mode are operated simultaneously. When the indoor temperature reaches the set desired temperature, it is switched to the hot water supply alone mode, and when the irrigation temperature of the double heat exchanger reaches the set desired temperature, it is automatically switched to the cooling single mode, and when both modes reach the set desired temperature, both modes are operated. Switch to standby.

In addition, it is controlled by a microcomputer controller (not shown) provided in the indoor unit, when the user selects and drives the heating and hot water mode, the heating mode and the hot water mode are operated simultaneously. When the indoor temperature reaches the set desired temperature, the hot water alone mode When the water supply temperature of the double heat exchanger reaches the set desired temperature, it is automatically switched to the heating single mode, and when both modes reach the set desired temperature, both modes are switched to the standby mode.

In the cooling of the hybrid heat pump system having the hot water supply function of 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 and liquefy, the outlet of the receiver of the indoor unit 20 is discharged. Adiabatic expansion with low temperature low pressure liquid through the indoor expansion valve (4), then flows into the indoor heat exchanger (5), sucks heat from the air in the room, and changes phase into low temperature low pressure gas to supply hot water in a double tube heat exchanger. In order to prevent a drop in temperature, the cycle bypassed by the bypass valve 50 and passed through the four-way valve 2 to the compressor 1 is repeated.

In addition, the heating of the refrigerant gas discharged from the compressor (1) bypasses the double tube heat exchanger (100) installed in the indoor unit (20) to radiate heat in the indoor heat exchanger (5) to condense and liquefy. 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 adiabaticly expands 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.

At this time, by the heating auxiliary heater 200 provided on one side of the indoor heat exchanger 5 of the indoor unit 20 to increase the time of the indoor air temperature, the heating efficiency is greatly improved.

The hot water supply by the hybrid heat pump system having the hot water supply function of the present invention is used by receiving the hot water water discharged from the discharge part 111 of the double pipe heat exchanger 100, and the inflow part 112 into which direct water flows. Direct water flowing from the second circulation pipe is provided in the inner side of the first circulation pipe 110 in the process of circulating along the first circulation pipe 110, the heat of condensation of the refrigerant circulation unit 30 ( As the heat exchange is performed by 120, the water temperature is increased, so that the user can receive and use the hot water supply.

That is, the hot water refrigerant control valve 6 and the switching valve 7 so that the refrigerant gas flowing out through the compressor 1, the four-way valve 2 and the outdoor heat exchanger 3 does not pass through the indoor heat exchanger 5. ) Is sequentially supplied to the second circulation tube 120 of the double tube heat exchanger 100, and thus the refrigerant gas of high temperature and high pressure circulating the second circulation tube 120 is supplied from the inlet 112. The hot water supply is supplied by exchanging heat with the vertical water circulated along the first circulation pipe 110 of the double pipe heat exchanger 100.

In addition, when cooling is operated while hot water is supplied, the refrigerant gas is circulated to the compressor 1 directly by the bypass valve 50 without passing through the double pipe heat exchanger 100 so that the refrigerant gas is By preventing interference by the double tube heat exchanger 100, regardless of cooling, the user can receive and use hot water of a required temperature.

In addition, since the refrigerant circulated through the bypass valve 50 is prevented from interfering with the double tube heat exchanger 100, the refrigerant efficiency of the refrigerant cycle may be prevented from being lowered, and thus, the indoor cooling effect is not reduced. .

In addition, during the defrosting operation, the defrost valve 8 connected to the stop of the second circulation pipe 120 is closed and the control valve 9 is opened so that the refrigerant gas circulates through the entire second circulation pipe 120. By circulating only a portion of the lower side of the second circulation pipe 120 and then discharged to the outdoor heat exchanger 3 side, the watering temperature circulating the first circulation pipe 110 of the double pipe heat exchanger 100 is excessively lowered. In the defrost mode, when the endothermic amount of the air heat source is insufficient and the defrosting of the outdoor heat exchanger 3 is not performed smoothly, the refrigerant gas flows into the first circulation pipe 110 inside the double tube heat exchanger 100. The defrosting operation can be efficiently performed by absorbing heat from the heat source (that is, watering) circulating and then allowing the defrosting operation to be performed.

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.

<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

30: refrigerant circulation part 40: temperature detection sensor

50: bypass valve

100: double tube heat exchanger

110: first circulation pipe 111: discharge part

112: inlet 120: second circulation pipe

130: water temperature sensor

200: heating auxiliary heater

Claims (6)

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 a cooling and cooling refrigerant circulation unit for circulating the outdoor unit and the indoor unit. In a cooling and heating system that selectively performs cooling and heating according to the switching, A double tube heat exchanger installed inside the indoor unit and connected to a refrigerant circulation unit through which refrigerant gas discharged from the compressor is circulated and condensed so that hot water is supplied by the amount of condensation heat; A hot water refrigerant control valve installed in the refrigerant circulation unit and configured to directly supply the refrigerant gas to the double pipe heat exchanger without passing through the indoor heat exchanger in the hot water supply mode; And A defrost valve installed at a stop of the second circulation pipe constituting the double tube heat exchanger, and configured to discharge the refrigerant gas in the defrost mode without circulating the entire second circulation pipe and circulating only to the stop. Hybrid heat pump system having a hot water supply, characterized in that made. The method of claim 1, The double tube heat exchanger may include: a first circulation pipe having a discharge part for discharging hot water and an inlet part for direct water flow respectively connected to one side; A hybrid heat pump system having a hot water supply function, characterized in that the second circulation pipe is provided on the inner side of the first circulation pipe to circulate the heat of condensation of the refrigerant circulation portion. The method of claim 1, One side of the indoor heat exchanger is a hybrid heat pump system having a hot water supply function, characterized in that the heating auxiliary heater is further provided when the heating operation. The method of claim 1, One side of the double heat exchanger is a hybrid heat pump system having a hot water supply function, characterized in that the water temperature temperature sensor for controlling the operation of the compressor by detecting the water temperature of the double heat exchanger is further provided. The method of claim 1, Refrigerant circulation unit connected to the compressor is a hybrid heat pump system having a hot water supply function characterized in that the temperature sensing sensor for sensing the temperature discharged from the compressor is further provided. The method of claim 1, The refrigerant circulation unit circulating the double heat exchanger further includes a bypass valve for allowing refrigerant gas to circulate directly to the compressor side without passing through the double tube heat exchanger, thereby preventing the refrigerant gas from being interfered by the double tube heat exchanger. Hybrid heat pump system having a hot water supply, characterized in that.

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