KR101444739B1 - Heater using heat pump cycle - Google Patents

Abstract

A heating apparatus using a heat pump cycle is disclosed. A heating apparatus using a heat pump cycle according to the present invention includes a heat exchanger; A subcooling degree regulating unit in which the primary refrigerant recovered in the heat exchanger flows into one side, the subcooled secondary refrigerant cooled in the evaporating / condensing outdoor unit flows into the other side and is heat-exchanged; A compressor for compressing the secondary refrigerant heated by the supercooling degree regulator; An evaporating / condensing outdoor unit for subcooling the cooled primary refrigerant after passing through the supercooling degree adjusting unit; A water separator for separating the primary refrigerant supercooled from the evaporating / condensing outdoor unit into a gas and a liquid, supplying the gasified refrigerant as a secondary refrigerant to the subcooling degree regulator, and supplying the liquid refrigerant to the evaporation / condensation outdoor unit .
According to this, the gas-liquid separator provided in the refrigerant extraction-side pipe of the evaporation / condensation outdoor unit separates the gaseous refrigerant and the liquid-state refrigerant in the piping to facilitate the flow of gaseous refrigerant, and the liquid- The flow can be further promoted by the refrigerant circulation pump, so that the heat transfer performance can be improved.

Description

[0001] HEATING USING HEAT PUMP CYCLE [0002]

The present invention relates to a heating apparatus using a heat pump cycle, and more particularly, to a refrigerant circulation pump installed in an outdoor heat exchanger that performs an evaporation operation in accordance with a heating operation cycle to circulate liquid refrigerant in a low temperature state, The present invention relates to a heating apparatus using a heat pump cycle.

In general, a heat pump system basically includes a cooling cycle and a heating cycle in the same unit for cooling and heating. In a single unit, the cooling is performed by a cooling cycle in the summer, And a hot water supply system.

The conventional heat pump system includes a compressor for compressing a refrigerant gas to a high temperature and a high pressure, an air side heat exchanger for exchanging heat with air, a cold / hot water heat exchanger for exchanging heat with water circulating in the indoor cooling / heating space, An electromagnetic four-way valve for converting the flow direction of the refrigerant discharged from the compressor into the air side heat exchanger, the cold / hot water heat exchanger and the hot water heat exchanger for each cooling and heating mode; and a low- A liquid separator for discharging the refrigerant in the gaseous state to the compressor, evaporating the refrigerant in the liquid state and sending it to the compressor, a liquid separator for temporarily storing the refrigerant, In addition, by separating the non-condensed refrigerant or the non-condensed gas contained in the refrigerant liquid, The receiver group is made to send toward the heating expansion valve.

Here, the refrigerant gas evaporated in the cold / hot water heat exchanger flows into the liquid separator through the electromagnetic four-way valve, is separated into liquid and liquid, and is returned to the compressor in a gaseous state, thereby completing the cooling cycle.

In the conventional heating operation cycle, the refrigerant gas of high temperature and high pressure compressed by the compressor is sent to the cold / hot water heat exchanger through the electromagnetic four-way valve, and the inlet water temperature flowing through the cold / hot water heat exchanger is used to heat the room by making hot water of about 45 ° C.

In this process, the refrigerant gas is condensed and changed into the refrigerant liquid. The refrigerant liquid flowing out of the cold / hot water heat exchanger flows into the receiver through the electromagnetic four-way valve and then flows into the cooling / heating expansion valve in the liquid state. The refrigerant liquid passing through the cooling / heating expansion valve flows into the air side heat exchanger, evaporates while absorbing the heat source of the outside air, and the evaporated refrigerant gas is returned to the compressor through the liquid separator through the electromagnetic four-

On the other hand, in the hot water supply, in the heating operation cycle, the refrigerant gas of high temperature and high pressure is sent through the electromagnetic four-way valve to the hot water heat exchanger instead of the cold / hot water heat exchanger so that the inlet water temperature of about 20 캜 is raised, do.

Prior art related to this is disclosed in Korean Patent No. 373733.

The present invention relates to a refrigerator, and more particularly, to a refrigerator using an inflator having a condensing function capable of greatly reducing or eliminating the size of a condenser by thermally expanding and condensing gaseous refrigerant generated in an evaporator in an inflator.

However, in the conventional heat pump system, when the temperature of the refrigerant is lowered, the flow is lowered and the flow of heat is deteriorated in the outdoor heat exchanger.

Further, since the gaseous refrigerant and the liquid refrigerant (hereinafter referred to as " liquid refrigerant ") are present together in the pipe, the circulation efficiency is lowered when the gaseous refrigerant is increased.

On the other hand, the heat exchange function in the evaporation / condensation outdoor unit absorbs heat from the inhaled air, so a temperature difference occurs between the inside and the outside of the evaporation / condensation outdoor unit.

Evaporation / condensation If the temperature difference between the inside and the outside of the outdoor unit is more than a certain level, frost will occur on the outer wall of the evaporation / condensation outdoor unit.

Such a frost layer serves not only as a heat resistor to interfere with heat transfer between the air and the refrigerant, but also increases the system resistance of the air by blocking the air flow path through the evaporation / condensation outdoor unit, thereby reducing the amount of air flowing into the evaporation / condensation outdoor unit, / Reduces the air-side heat transfer coefficient of the condensing outdoor unit and causes a decrease in heat transfer in the evaporating / condensing outdoor unit.

Conventionally, in order to prevent such a problem, a defrosting operation in which the refrigerant flows in the opposite direction to the flow in the normal operation is performed, and a separate electric heater provided around the forced forced ventilation evaporative / condensing outdoor unit is operated to defrost.

In the conventional defrosting method for a forced draft evaporation / condensing outdoor unit, the defrosting operation is operated at a constant time or the defrost heater is operated at a predetermined time to remove the frost which is implanted in the forced air blowing evaporation / condensation outdoor unit.

However, such a conventional defrosting method has not been effective. That is, the important point in the defrosting of the evaporation / condensation outdoor unit is that the congestion state gradually increases in the evaporation / condensation outdoor unit, thereby increasing the wind pressure of the fan and lowering the blowing efficiency.

Therefore, the conventional defrosting apparatus defrosting every predetermined time fails to find an optimum defrosting point, and the defrosting operation is unnecessarily performed frequently or the defrosting operation is performed after the optimum defrosting point, thereby causing a relatively increased heat loss .

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art described above, and it is an object of the present invention to provide a refrigerant circulation pump for connecting refrigerant piping of inlet and outlet side of an outdoor heat exchanger to forcibly circulate refrigerant of low temperature, A refrigerant flow can be promoted by separating gas and liquid refrigerant, a refrigerant flow in the outdoor heat exchanger is blocked, and a deficiency of pressure generated by the refrigerant flow can be detected to perform a defrosting operation. The purpose is to provide a heating device.

The above object of the present invention can be achieved by a heat exchanger comprising a hot water inlet pipe and a hot water pipe connected to one side and a refrigerant supply pipe and a refrigerant recovery pipe connected to the other side for supplying high temperature refrigerant; The refrigerant is cooled by the evaporator / condensing outdoor unit and flows into the other side to be heat-exchanged, so that the primary refrigerant is cooled and the secondary refrigerant is cooled. A subcooling degree adjusting unit for heating the subcooling degree; A compressor for introducing the secondary refrigerant heated by the supercooling degree adjusting unit and compressing the secondary refrigerant; A four-way valve for controlling a conveyance direction so as to convey the compressed refrigerant discharged from the compressor to the heat exchanger; An auxiliary heat exchanger for passing the cooled first side refrigerant after passing through the supercooling degree regulating section and for supercooling the first side refrigerant by heat exchange with the low temperature outside air; An evaporating / condensing outdoor unit through which the primary refrigerant subcooled from the auxiliary heat exchanger flows and cools the primary refrigerant; A first refrigerant supercooled from the evaporating / condensing outdoor unit flows through the four-way valve and is separated into a gas and a liquid, and the gasified refrigerant is supplied to a subcooling degree control unit as a secondary refrigerant, A water separator for supplying water into the water tank; And a bypass pipe connected to the water separator and the evaporating / condensing outdoor unit so that the liquid refrigerant transferred from the water separator is introduced into the evaporating / condensing outdoor unit so as to be supercooled. ≪ / RTI >

The auxiliary heat exchanger is formed outside the evaporating / condensing outdoor unit. The refrigerant passes through the subcooling degree adjusting unit, and the refrigerant of the primary refrigerant that has cooled through the auxiliary heat exchanger is heat-exchanged with the refrigerant of the low temperature. Passes through the filter dryer and the expansion valve formed in the middle of the evaporator, passes through the third check valve, and is supplied to the lower portion of the evaporator / condenser outdoor unit.

The evaporating / condensing outdoor unit is cooled by re-cooling the primary refrigerant subcooled from the auxiliary heat exchanger, and then transferred to the four-way valve through the upper fifth pipe.

The bypass pipe connects the water separator and the evaporating / condensing outdoor unit so that the liquid refrigerant transferred from the water separator flows into the evaporating / condensing outdoor unit to be supercooled. A solenoid valve for controlling opening and closing is mounted, And a refrigerant circulation pump is installed to accelerate the refrigerant circulation.

The liquid separator includes a take-in tube connected to one side of the upper portion and connected to the four-way valve, a liquid refrigerant return pipe connected to the bypass pipe in a tangential direction and connected to one side of the lower liquid pipe, And the lower end of the sixth pipe is spaced apart from the inner bottom and connected to the subcooling degree regulating part.

And a differential pressure sensing means for sensing the refrigerant flow rate inside the evaporating / condensing outdoor unit and the atmospheric pressure of the outside.

The differential pressure sensing means includes a first sensor disposed at an inner portion of the evaporative / condensing outdoor unit; A second sensor installed at the outside of the evaporation / condensation outdoor unit; A body connected to the first and second detectors and detecting a pressure difference by calculating input internal and external pressure values; And a control unit for receiving a signal transmitted from the main body to determine a defrosting operation time point and controlling defrost operation on / off.

The evaporation / condensation outdoor unit comprises: a main body; A main circulation conduit formed on the other side of the main body in a plurality of rows, a distributor connected to the inlet side, and a refrigerant connected to the outlet side through a header; And an auxiliary circulation conduit formed on the inner side of the main body, the auxiliary circulation conduit being formed to be close to the main circulation conduit through which the refrigerant is circulated and to be supplied with the superheated high-temperature refrigerant.

The main circulation duct and the auxiliary circulation duct have a plurality of protrusions formed on an inner circumferential surface thereof, and the heat transfer area can be enlarged by the plurality of protrusions.

According to the present invention, the gaseous state refrigerant in the piping can be separated from the liquid state refrigerant by the water separator provided on the refrigerant extraction side pipe of the evaporation / condensation outdoor unit to facilitate the flow of gaseous refrigerant, In particular, since the flow becomes worse when the temperature is low, the flow state can be promoted by the refrigerant circulation pump, and the heat transfer performance can be improved.

Also, the defrosting efficiency can be improved by performing the defrosting operation by determining the defrosting operation timing of the evaporating / condensing outdoor unit based on the pressure change according to the refrigerant flow.

1 is a configuration diagram of a heating apparatus using a heat pump cycle according to the present invention;
FIG. 2 is a side view showing the 'water separator' in FIG. 1,
3 is a front view showing the 'water separator' in FIG. 1,
FIG. 4 is a plan view showing the 'water separator' in FIG. 1,
FIG. 5 is a view showing an example of a 'heat exchanger' in FIG. 1; FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a side view of the 'water separator' in FIG. 1, and FIG. 3 is a side view of the 'water separator' in FIG. 1, FIG. 4 is a plan view showing the 'water separator' in FIG. 1, and FIG. 5 is a front view showing the inside of the evaporative / condensation outdoor unit or the auxiliary heat exchanger applied to the present invention.

1 to 5, in a heating apparatus A using a heat pump cycle according to the present invention, a hot water inlet pipe 11 and a hot water pipe 12 are connected to one side, (13) and a refrigerant return pipe (14) connected to each other; The recovered primary refrigerant is connected to the refrigerant recovery pipe 14 of the heat exchanger 1 and the supercooled secondary refrigerant cooled by the evaporating / condensing outdoor unit 6 flows into the other side for heat exchange A subcooling degree adjusting section (2) for cooling the primary side refrigerant and heating the secondary side refrigerant; A compressor (3) for introducing the secondary refrigerant heated by the supercooling degree adjusting unit (2) and compressing the secondary refrigerant; A four-way valve (4) for controlling the conveying direction so as to convey the compressed refrigerant discharged from the compressor (3) to the heat exchanger (1); An auxiliary heat exchanger (5) for passing the cooled first side refrigerant after passing through the supercooling degree controlling part (2) and supercooling the first side refrigerant by heat exchange with the low temperature outside air; An evaporating / condensing outdoor unit (6) for introducing the primary refrigerant subcooled from the auxiliary heat exchanger (5) and cooling the primary refrigerant; The primary refrigerant supercooled from the evaporation / condensation outdoor unit 6 is introduced into the four-way valve 4 to be separated into gas and liquid, the gasified refrigerant is supplied to the subcooling degree regulator as secondary refrigerant, A water separator (7) for supplying the refrigerant to the evaporation / condensation outdoor unit (6); A bypass pipe 8 connecting the water separator 7 and the evaporating / condensing outdoor unit 6 so that the liquid refrigerant transferred from the water separator 7 flows into the evaporating / condensing outdoor unit 6 to be supercooled; .

The heat pump system uses a fan to suck the heat source from the outside air, ground water, geothermal heat, etc. by using the cycle, and passes the sucked heat source through the channel of the coolant to collect heat to efficiently supply the large capacity hot water do.

The heat pump system is basically composed of a compressor 3, an evaporator / condenser outdoor unit 6 (which is used as a condenser in the case of cooling, an evaporator in the case of heating), a four-way valve 4 and a heat exchanger 1.

The heat exchanger 1 is connected to an inlet pipe 11 and an outlet pipe 12 of a hot water tank (or a heating pipe) at one side and a refrigerant supply pipe 13 for supplying high temperature refrigerant and a refrigerant pipe The hot water is heated by the heat of the high-temperature refrigerant flowing from the other side, that is, the heat of the primary refrigerant.

The supercooling degree control unit 2 is connected to the refrigerant recovery pipe 14 of the heat exchanger 1 so that the recovered primary refrigerant is introduced into one side while the supercooling degree control unit 2 is supercooled in the evaporation / So that the primary side refrigerant is cooled and the secondary side refrigerant is heated.

Usually, when the primary refrigerant is introduced, the temperature is about 35 ° C, and after cooling by heat exchange, it is cooled down to a lower temperature.

On the other hand, the secondary refrigerant flows into the liquid separator 9 in a state where the temperature after the heat exchange is raised.

The secondary refrigerant in the liquid state separated from the liquid separator 9 is introduced into the compressor 3 and then compressed.

The refrigerant compressed by the compressor 3 is delivered to the four-way valve 4 after passing through the oil separator 10 and is again supplied to the heat source of the heat exchanger 1 by the operation of the four-

On the other hand, the primary side refrigerant cooled in the supercooling degree adjusting unit 2 is transferred to the third pipe 103 after passing through the first check valve 201 through the second pipe 102. At this time, since the second check valve 202 is shut off, the primary refrigerant is transferred to the third pipe 103.

The primary refrigerant transferred to the third pipe (103) is supplied to the auxiliary heat exchanger (5).

The auxiliary heat exchanger (5) is formed outside the evaporator / condensing outdoor unit (6). The auxiliary heat exchanger (5) is supercooled by exchanging the cooled primary refrigerant after passing through the supercooling degree controlling unit (2) with the low temperature outside air.

The primary refrigerant that has passed through the auxiliary heat exchanger 5 passes through the fourth pipe 104 and passes through the filter dryer 13 and the expansion valve 14 formed therein and then passes through the third check valve 203 And is supplied to the lower portion of the evaporation / condensation outdoor unit 6.

The evaporating / condensing outdoor unit 6 re-circulates the primary refrigerant supercooled from the auxiliary heat exchanger 5 and then transfers the cooled refrigerant to the four-way valve 4 through the upper fifth pipe 105.

 The refrigerant flowing into the four-way valve (4) through the fifth pipe (105) is transferred to the water separator (7) through the outlet.

The water separator 7 separates the primary refrigerant subcooled from the evaporating / condensing outdoor unit 6 through the four-way valve 4 into a gas and a liquid, and uses the gasified refrigerant as a secondary refrigerant, And the liquid refrigerant is supplied to the evaporation / condensation outdoor unit 6 through the bypass pipe 8. The liquid refrigerant is supplied to the supercooling degree adjusting unit 2 through the pipe 106,

23 to 4, the water separator 7 is connected in a tangential direction to one side of the upper part and connected to the four-way valve 4, And a sixth pipe 106 connected to the top plate to communicate with the inner plate and connected to the bottom of the inner bottom so as to be connected to the subcooling degree control unit 2, do.

Therefore, the refrigerant flowing through the inlet pipe 11 from the four-way valve 4 is lowered while rotating inside the water separator 7, the liquid refrigerant is recovered into the liquid refrigerant return pipe 14, 6 pipe (106).

The bypass pipe 8 connects the water separator 7 and the evaporating / condensing outdoor unit 6 so that the liquid refrigerant transferred from the water separator 7 flows into the evaporating / condensing outdoor unit 6 to be supercooled A solenoid valve 82 for controlling the opening and closing, and a refrigerant circulation pump 84 are mounted for promoting the circulation of the refrigerant.

In the winter when the outside temperature is low, the circulation decreases when the temperature of the refrigerant is too low. Particularly, in the case of the liquid refrigerant, the circulation is further lowered, thereby causing an overload in the compressor 3, which may cause breakage.

Therefore, a sensor (not shown) for detecting the refrigerant flow rate is formed in the inlet side refrigerant pipe 65 or the outlet side refrigerant pipe 66 of the evaporation / condensation outdoor unit 6 to detect whether the refrigerant flow is lowered.

When the refrigerant flow is lowered, the refrigerant circulating pump 84 is driven to forcibly circulate the liquid refrigerant, whereby the liquid refrigerant collected in the water separator 7 can be recovered and reused, and the circulation of the liquid refrigerant in the low temperature state can be promoted So that the overload applied to the compressor (3) can be eliminated.

The secondary refrigerant flowing out from the water separator 7 into the gaseous state is in a low temperature state and flows into the subcooling degree regulating section 2 again to be heat-exchanged with the primary refrigerant, thereby obtaining heat, do.

On the other hand, the sensor mounted on the fourth pipe 104 on the inlet side or the fifth pipe 105 on the outlet side of the evaporation / condensation outdoor unit 6 senses the refrigerant flow velocity.

That is, when the refrigerant temperature is lowered and the flow rate is lowered, the sensor senses it.

It is determined whether the refrigerant flow rate is lower than the set value.

When it is determined that the refrigerant flow rate has decreased, the refrigerant circulation pump 84 is driven.

The refrigerant circulation pump 84 is driven so that the fifth pipe 105 connected from the fourth pipe 104 on the inlet side of the evaporation / condensation outdoor unit 6 to the evaporation / condensation outdoor unit 6 and the water separator 7, The circulation of the refrigerant flowing through the inside of the compressor can be forcibly accelerated.

On the other hand, since the heat exchange action in the evaporation / condensation outdoor unit 6 absorbs heat from the inhaled air, a temperature difference is generated between the inside and the outside of the evaporation / condensation outdoor unit 6.

When the temperature difference between the inside and the outside of the evaporating / condensing outdoor unit 6 is more than a certain level, frosting occurs on the outer wall of the evaporating / condensing outdoor unit 6.

This frost layer functions not only as a heat resistor for interrupting heat transfer between the air and the refrigerant but also because it increases the system resistance of air blocking the air flow path passing through the evaporation / condensing outdoor unit 6, Thereby reducing the air-side heat transfer coefficient of the evaporation / condensation outdoor unit 6 and causing a decrease in the heat transfer amount in the evaporation / condensation outdoor unit 6. [

Therefore defrosting operation is necessary to remove the frost layer. In particular, the defrosting operation should be performed at the time when the congestion state of the evaporation / condensation outdoor unit 6 gradually increases to increase the wind pressure of the fan and lower the blowing efficiency.

In order to find the best defrosting point, the present invention is provided with a differential pressure detecting means 12 for sensing the refrigerant flow rate inside the evaporating / condensing outdoor unit 6 and the atmospheric pressure outside to perform the defrosting operation.

The differential pressure sensing means 12 includes a first sensor 121 disposed at an inner portion of the evaporation / condensation outdoor unit 6; A second sensor 122 installed at the outside of the evaporation / condensation outdoor unit 6; A main body 120 connected to the first and second detectors 122 to calculate pressure values of the inside and outside of the main body 120 to detect a pressure difference; And a control unit for receiving a signal transmitted from the main body 120 to determine a defrost operation time point and controlling defrost operation on / off.

The first and second sensors 122 are adapted to sense pressure. When the air flow inside the evaporation / condensation outdoor unit 6 is normal, it is regarded as a normal state since there is almost no pressure difference with the outside.

However, when a frost layer is formed by freezing between the fins constituting the evaporation / condensation outdoor unit 6, the flow of air is reduced. That is, due to the driving of the fan 85 mounted on the upper part of the evaporating / condensing outdoor unit 6, the air pressure to be introduced into the upper part is significantly reduced compared with the air pressure discharged to the upper part. Which causes failure.

Accordingly, the first sensor 121 senses the pressure of the internal air of the evaporation / condensation outdoor unit 6, and the second sensor 122 senses the external air pressure to calculate the pressure difference at the control unit of the main body 83, Calculate the car.

The control unit determines the defrosting operation timing by transmitting data on the pressure difference calculated by the control unit to the control unit.

That is, whether or not a pressure difference exceeding the set value is generated.

Thereafter, when a pressure difference exceeding the set value is generated, it is determined that freezing has occurred and the defrosting operation is performed.

5 is a front view showing the inside of the evaporative / condensation outdoor unit or the auxiliary heat exchanger according to the present invention.

As shown, the evaporation / condensation outdoor unit 6 or the auxiliary heat exchanger 5 includes a casing 300; A main circulation duct 400 formed in a plurality of rows on the other side of the casing 300 and having a distributor 700 connected to the inlet side and a refrigerant connected to the outlet 600 side; And an auxiliary circulation line 500 formed at one side of the casing 300 and formed to be close to the circulation duct 400 through which the refrigerant circulates and to which superheated high-temperature refrigerant is supplied.

Accordingly, the superheated refrigerant is supplied through the auxiliary circulation line 500, and local defrosting operation can be performed.

Preferably, the main circulation duct 400 and the auxiliary circulation duct 500 are separately formed, and the refrigerant supplied to the main circulation duct 400 and the auxiliary circulation duct 500 is separately circulated.

For example, the main circulation duct 400 allows the main refrigerant to circulate while the auxiliary circulation duct 500 circulates only the superheated refrigerant.

As the superheated refrigerant is circulated, the auxiliary circulation pipe 500 has a heating function, so that a local defrosting function can be implemented for a region vulnerable to freezing of the heat exchanger 1. [

The main circulation duct 400 or the auxiliary circulation duct 500 has a plurality of protrusions 450 formed on the inner circumferential surface thereof so that the heat transfer area can be enlarged.

Hereinafter, the operation of the present invention will be described.

When the start button is turned on, power is connected and the heat pump is turned on.

Thereafter, the fan of the heat exchanger 1 is operated, and the refrigerant circulation pump 84 is operated.

Then, the refrigerant compressed in the compressor (3) passes through the four-way valve (4) and is supplied to the primary refrigerant, which is a heat source of heat of the heat exchanger (1). After completion of the heat exchange, do.

On the other hand, in the water separator 7, the secondary refrigerant flows into the supercooling degree adjusting section 2 through the sixth pipe 106 to heat the primary refrigerant by heat exchange with the primary refrigerant, and conversely, The secondary refrigerant flows into the compressor (3) via the liquid separator (9).

Meanwhile, the refrigerant on the primary side is transferred to the second piping 102 and the third piping 103, is introduced into the auxiliary heat exchanger 5, is cooled, passes through the filter drier 13 and the expansion valve 14, / Condensing outdoor unit 6 to be cooled.

The refrigerant cooled from the evaporation / condensation outdoor unit 6 flows into the four-way valve 4 through the fifth pipe 105 and is then transferred to the water separator 7.

Thereafter, the liquid refrigerant in the water separator 7 flows into the bypass pipe 8 and is supplied to the evaporation / condensation outdoor unit 6 by the driving of the refrigerant circulation pump 84 and is cooled.

On the other hand, the gaseous refrigerant discharged from the water separator 7 is supplied to the subcooling degree regulating part 2 through the sixth pipe 106 to act as the secondary refrigerant.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the invention, It is obvious that the claims fall within the scope of the claims.

1: Heat Exchanger 2: Subcooling Regulator
3: Compressor 4: Four-way valve
5: Auxiliary heat exchanger 6: Evaporation / condensation outdoor unit
7: Water separator 8: Bypass pipe

Claims (9)

A heat exchanger 1 connected to a hot water inlet pipe 11 and an outlet pipe 12 at one side and connected to a refrigerant supply pipe 13 and a refrigerant recovery pipe 14 for supplying high temperature refrigerant to the other side;
The recovered primary refrigerant is connected to the refrigerant recovery pipe 14 of the heat exchanger 1 and the supercooled secondary refrigerant cooled by the evaporating / condensing outdoor unit 6 flows into the other side for heat exchange A subcooling degree adjusting section (2) for cooling the primary side refrigerant and heating the secondary side refrigerant;
A compressor (3) for introducing the secondary refrigerant heated by the supercooling degree adjusting unit (2) and compressing the secondary refrigerant;
A four-way valve (4) for controlling the conveying direction so as to convey the compressed refrigerant discharged from the compressor (3) to the heat exchanger (1);
An auxiliary heat exchanger (5) for passing the cooled first side refrigerant after passing through the supercooling degree controlling part (2) and supercooling the first side refrigerant by heat exchange with the low temperature outside air;
An evaporating / condensing outdoor unit (6) for introducing the primary refrigerant subcooled from the auxiliary heat exchanger (5) and cooling the primary refrigerant;
The primary refrigerant supercooled from the evaporation / condensation outdoor unit 6 is introduced into the four-way valve 4 to be separated into gas and liquid, the gasified refrigerant is supplied to the subcooling degree regulator as secondary refrigerant, A water separator (7) for supplying the refrigerant to the evaporation / condensation outdoor unit (6);
A bypass pipe 8 connecting the water separator 7 and the evaporating / condensing outdoor unit 6 so that the liquid refrigerant transferred from the water separator 7 flows into the evaporating / condensing outdoor unit 6 to be supercooled; / RTI >
And differential pressure sensing means (12) for sensing a refrigerant flow rate inside the evaporating / condensing outdoor unit (6) and an external atmospheric pressure,
The differential pressure sensing means (12)
A first sensor 121 installed at the inside of the evaporation / condensation outdoor unit 6;
A second sensor 122 installed at the outside of the evaporation / condensation outdoor unit 6;
A main body 120 connected to the first and second sensors 122 to calculate a pressure value of the inside and outside of the main body 120 to detect a pressure difference;
A control unit for receiving a signal transmitted from the main body 120 to determine a defrost operation time point and controlling defrost operation on / off;
And a heat pump unit for heating the heat pump.
The method according to claim 1,
The auxiliary heat exchanger (5) is formed outside the evaporating / condensing outdoor unit (6)
After passing through the supercooling degree adjusting section (2), the cooled primary side refrigerant is subjected to heat exchange with the low temperature outside air,
The primary refrigerant that has passed through the auxiliary heat exchanger 5 passes through the fourth pipe 104 and passes through the filter dryer 13 and the expansion valve 14 formed therein and then passes through the third check valve 203 And is supplied to the lower portion of the evaporation / condensation outdoor unit (6). The method according to claim 1,
The evaporating / condensing outdoor unit 6 is cooled by re-cooling the primary refrigerant supercooled from the auxiliary heat exchanger 5 and then transferred to the four-way valve 4 through the upper fifth pipe 105 Heating device using heat pump cycle. The method according to claim 1,
The bypass pipe 8 is connected to the water separator 7 and the evaporating / condensing outdoor unit 6 so as to allow the liquid refrigerant transferred from the water separator 7 to flow into the evaporating / condensing outdoor unit 6, , And a refrigerant circulation pump (84) is installed to facilitate the circulation of the refrigerant. The refrigerant circulation pump (84) is connected to the solenoid valve (82). The method according to claim 1,
The water separator (7)
An inlet pipe connected tangentially to one side of the upper portion and connected to the four-way valve (4);
A liquid refrigerant recovery pipe (14) connected to the bypass pipe (8) in a tangential direction on a lower side thereof;
A sixth pipe 106 connected to the top plate to communicate with the inner bottom and connected to the bottom of the inner bottom so as to be connected to the subcooling control unit 2;
And a heat pump for heating the heat pump. delete delete The method of claim 3,
The evaporating / condensing outdoor unit (6) and the auxiliary heat exchanger (5)
A casing (300);
A main circulation duct 400 formed in a plurality of rows on the other side of the casing 300 and having a distributor 700 connected to the inlet side and a refrigerant connected to the outlet 600 side;
An auxiliary circulation line 500 formed at one side of the inside of the casing 300 and formed to be close to the main circulation line 400 through which the refrigerant circulates and to which superheated high-temperature refrigerant is supplied;
And a heat pump unit for heating the heat pump. 9. The method of claim 8,
Wherein the main circulation duct (400) and the auxiliary circulation duct (500) have a plurality of protrusions (450) formed on an inner circumferential surface thereof so that the heat transfer area can be enlarged.

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