KR101835786B1 - Driving Transfer System of Air Heat-Binary Cycle Heat Pump - Google Patents

Abstract

The present invention relates to a system to operate an air heat-binary cycle heat pump. According to the present invention, the system to operate the air heat-binary cycle heat pump comprises: a binary cycle operation to make refrigerant gas discharged from a high end-side compressor circulate to be introduced into the high end-side compressor again and to continue circulation and to make refrigerant gas discharged from a low end-side compressor circulate to be introduced into the low end-side compressor again and to continue circulation, thereby operating the heat pump at subzero temperatures in winter; a single cycle operation to make refrigerant gas discharged from the low end-side compressor produce hot water by exchanging heat in a low-temperature heat exchanger, be evaporated by exchanging heat with air in a fin-tube-type heat exchanger, and pass through a cascade heat exchanger, thereby being condensed to be stored in a receiver, to produce cold water through a heat exchanger, and to be reintroduced into the low end-side compressor, thereby continuing circulation, to operate the heat pump to simultaneously produce hot water and cold water at above-zero temperatures in spring, summer, and fall; and a defrosting operation (cold water operation) to make high-temperature refrigerant gas discharged from the low end-side compressor defrost a fin-tube of the fin-tube-type heat exchanger to be condensed and to be stored in the receiver, thereby evaporating from the low end-side heat exchanger and being introduced into the low end-side compressor again. The present invention is to provide a system to operate an air heat-binary cycle heat pump, which is able to greatly reduce power costs by using a binary cycle operation of the heat pump, which produces hot water, at subzero temperatures in winter and using a single cycle operation in the other seasons with above-zero temperatures.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat pump,

Cycle cycle heat pump operating system that performs two-cycle operation and short cycle operation applied to an air heat source heat pump.

Generally, an air conditioner is a device for reducing indoor temperature by discharging cool air generated through compression, condensation, expansion and evaporation of a refrigerant to the room, and is divided into an outdoor unit installed on the outdoor side and an indoor unit installed on the indoor side . In the case of such an air conditioner, a plurality of indoor units are connected to one outdoor unit so that a plurality of indoor spaces can be cooled or heated.

That is, the air conditioner includes a compressor, a four-way valve, an outdoor heat exchanger, an outdoor fan, an expansion valve and an indoor heat exchanger, and an indoor fan.

On the other hand, in the case of the heat pump included in the air conditioner, the efficiency of the hot water production is lowered due to the lack of evaporation heat of the outside air during the cold weather in winter, so that it is impossible to operate the single cycle heat pump. A heat pump composed of two cycles is used.

Here, the cycle composed of two compressors is the above-described two-cycle system, and the cycle constituted by one compressor is the above-described single cycle system.

Particularly, as the heat pump for producing hot water, the heat pump using the above-mentioned two-cycle method is widely used, so that it is used efficiently in the coldest winter season.

Therefore, two high-stage and low-stage compressors are installed to constitute a refrigeration cycle. The high-stage compressor produces hot water and the low-stage compressor functions to supplement and complement the cycle of the high-stage compressor.

However, the temperature difference between the early spring and the late autumn, rather than the subse- quent winter, is insufficient for the two-cycle cycle in terms of efficiency and performance even when a single-cycle operation is performed. There was a problem. In addition, since hot water and cold water can not be produced at the same time in the case of a single cycle, there is a disadvantage that separate defrosting operation must be performed in order to produce cold water.

On the other hand, hot water is used in hospitals, nursing homes, nursing homes, lodging facilities (motels, hotels), while cooling in the middle seasons (late spring and early autumn)

However, since the conventional heat pump does not produce hot water when it is cooled, there is a disadvantage that a separate heat pump or other heat source boiler must be used in order to use hot water.

An object of the present invention is to provide an air-to-two-cycle heat pump operation system capable of greatly reducing power cost by operating in a two-cycle operation in a sub- .

It is another object of the present invention to provide an air-to-two-cycle heat pump for simultaneously producing cold water and hot water in a mid-season and a lower-season cooling without requiring a separate heat pump or a boiler of another heat source, Thereby providing a driving system.

In the air-heat cycle heat pump operation system of the present invention, the refrigerant gas discharged from the high-stage side compressor 100 is sucked into the high-stage side compressor 100 while circulating, A two-cycle operation in which the heat pump is operated in the sub-zero zone in the winter mode in such a manner that the discharged refrigerant gas is circulated and then sucked into the low-stage side compressor 200 to continue the circulation; The refrigerant gas discharged from the low-stage side compressor 200 is heat-exchanged in the low-temperature heat exchanger to produce hot water. The reduced-pressure refrigerant gas is evaporated by heat exchange with air in a fin-tube heat exchanger 230, (CASCADE) heat exchanger 130 and then condensed to be stored in a receiver 240 and further decompressed to produce cold water through the cold water producing heat exchanger 300 and then sucked into the lower stage compressor 200 A single cycle operation in which the heat pump is operated so that hot water and cold water are simultaneously produced in spring, summer, and autumn image volumes; And the high-temperature refrigerant gas discharged from the low-stage compressor 200 is depressurized to defrost the pin-tube air phase of the fin-tube heat exchanger 230 and is condensed and stored in the receiver 240, And a defrosting operation (cold water operation) in which the heat pump is operated to evaporate in the production heat exchanger 300 and to be sucked back to the low-stage side compressor 200.

Further, in the two-cycle operation, the refrigerant gas discharged from the high-stage side compressor is sequentially sucked into the high-stage side compressor while circulating through the high-stage side heat exchanger, the high-stage side expansion valve and the cascade heat exchanger, Is condensed by the evaporation gas of the high-stage side compressor in the cascade heat exchanger and stored in the receiver, and then sucked and circulated in the low-stage side compressor while passing through the low-stage side expansion valve and the pin-tube type heat exchanger .

In addition, in the short cycle operation, when the temperature of the hot water produced by the heat exchange in the heat exchanger for middle and lower seasonal hot water production 140 reaches the predetermined temperature, the refrigerant gas discharged from the low- The refrigerant gas discharged from the compressor passes through the FIN-TUBE heat exchanger without passing through the low temperature heat exchanger, and is converted into the defrosting operation for producing cold water.

According to the present system, the heat pump, which was operated in a dual cycle to produce hot water, is operated in a single cycle in the three seasons of keeping the image volume during the year, so that the power cost can be drastically reduced, The convenience of the user can be improved, and the quality of the heat pump product can be improved and the purchasing power of the consumer can be enhanced. In addition, it is possible to simultaneously produce cold water and hot water without the need of a separate heat pump or other heat source boiler in the case of three-season cooling, which maintains the year-round image volume, by compensating for the disadvantage that hot water is not produced during cooling in the existing heat pump There are advantages.

1 is a diagram illustrating a short cycle operation of the air-heat / two-cycle heat pump operating system according to the present invention.
FIG. 2 is a diagram illustrating a two-cycle operation of the air-heat cycle heat pump operation system according to the present invention.
FIG. 3 is a diagram illustrating defrost operation of the air-heat / two-cycle heat pump operating system according to the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms as used herein include plural forms as long as the phrases do not expressly express the opposite meaning thereto. Means that a particular feature, region, integer, step, operation, element and / or component is specified, and that other specific features, regions, integers, steps, operations, elements, components, and / And the like.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Accordingly, the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

FIG. 1 is a view showing a single cycle operation of the air-heat cycle heat pump operation system according to the present invention, FIG. 2 is a diagram showing a double cycle operation of the air-heat- Is a diagram illustrating a defrost operation of the air-heat / two-cycle heat pump operating system according to the present invention.

The air-to-heat cycle heat pump of the present invention is a single-cycle operation shown in Fig. 1 or a defrosting operation shown in Fig. 3 in the spring, summer, and fall of an image volume, Cycle operation.

That is, the air heat-two-cycle heat pump operation system includes two-cycle operation, short-cycle operation, and defrost operation (cold water operation).

Here, the specific configuration of the air-heat cycle heat pump operation system is such that the refrigerant gas discharged from the high-stage side compressor 100 circulates and is again sucked into the high-stage side compressor 100 to continue circulation, 200) is circulated and then sucked into the low-stage side compressor (200) to continue the circulation, and the heat pump is operated in the subzero circulation in winter. The refrigerant gas discharged from the low-stage side compressor 200 is heat-exchanged in the low-temperature heat exchanger to produce hot water. The reduced-pressure refrigerant gas is evaporated by heat exchange with air in a fin-tube heat exchanger 230, (CASCADE) heat exchanger 130 and then condensed to be stored in a receiver 240 and further decompressed to produce cold water through the cold water producing heat exchanger 300 and then sucked into the lower stage compressor 200 A single cycle operation in which the heat pump is operated so that hot water and cold water are simultaneously produced in spring, summer, and autumn image volumes; And the high-temperature refrigerant gas discharged from the low-stage compressor 200 is depressurized to defrost the pin-tube air phase of the fin-tube heat exchanger 230 and is condensed and stored in the receiver 240, And a defrosting operation (cold water operation) in which the heat pump is operated to evaporate in the production heat exchanger 300 and to be sucked into the low-stage side compressor 200 again.

In the two-cycle operation, the refrigerant gas discharged from the high-stage side compressor 100 is sequentially placed in the hot water producing heat exchanger 110, the high-stage side expansion valve 120 and the cascade heat exchanger 130 And then sucked back to the high-stage side compressor 100 and circulated.

In the dual cycle operation, the refrigerant gas discharged from the low-stage side compressor 200 is condensed by the evaporation gas of the high-stage side compressor 100 in the cascade heat exchanger 130 and stored in the receiver 240 The refrigerant is sucked into the low-stage side compressor 200 while circulating through the low-stage side expansion valve 250 and the pin-tube type heat exchanger 230, and then circulated.

Therefore, it is possible to greatly reduce the power cost by operating the four-seasons bicycle in a single cycle throughout the year, which has been operated in the four-seasons bicycle cycle through the air-heat / two-cycle heat pump operation system.

The air heat-bicycle heat pump operation system will be described in detail as follows.

First, in the case of the two-cycle operation, the refrigerant discharged from the high-stage compressor 100 is separated from the oil separator 105 along the first pipe 10 and is discharged through the second pipe 11 The hot water is heated in the heat exchanger 110 and condensed and expanded in the high stage side expansion valve 120 along the third pipeline 12 and then flows into the cascade heat exchanger 130 along the fourth pipeline 13 Exchanged with the high-temperature gas of the side compressor (200), evaporated and sucked into the high-stage compressor (100) along the fifth duct (14) to continue the circulation.

The refrigerant gas discharged from the low-stage side compressor 200 is separated from the oil separator 205 along the sixth line 20 and is diverted from the three-way valve 210 along the seventh line 21, Way valve 220 along the conduit 22 and along the ninth conduit 23 through the first check valve 310 and along the tenth conduit 24 to the cascade heat exchanger 130 Is condensed by the evaporative gas of the high-stage compressor 100 and is stored along the eleventh duct 25 in the receiver 240 and passes through the filter dryer 250 along the twelfth duct 26, Is expanded at the lower expansion valve 260 along the line 13 and along the line 14 to the second check valve 270 along the line 14 and along the line 15 to the pin- Directional valve 220 along the sixteenth conduit 30 and flows through the liquid separator 330 along the seventeen conduit 35 to flow the liquid Separated and sucked into the low-stage side compressor (200) according to claim 18, the channel 36 being thereby continue the cycle.

The refrigerant gas discharged from the low-stage side compressor 200 is separated from the oil separator 205 along the sixth line 20 and flows along the seventh line 21 in the three- The hot water is heat-exchanged in the middle and lower season hot water producing heat exchanger 140 along the 19th pipeline 33 to produce hot water and the third check valve 320, and is redirected along the eighth line 22 at the four-way valve 220 to be reduced in pressure along the sixteenth line 30 to perform heat exchange with air in the pin-tube heat exchanger 230, 15 passage 29 along a fourth check valve 290 and along a tenth conduit 24 through the cascade heat exchanger 130 and along the eleventh conduit 25 to the receiver 240, Passes through the filter dryer 250 along the twelfth pipe line 26 and is expanded in the low-stage expansion valve 260 along the 13th pipe line 27, And then passes through the fifth check valve 280 along the second check valve 28 and is heat-exchanged in the cold water producing heat exchanger 300 along the 21st pipeline 31 to produce cold water. Directional valve 220 along the line 23 to separate the liquid from the liquid separator 330 along the seventeenth line 35 and to discharge the liquid to the low-stage compressor 200 along the line 18 And the circulation is continued by being sucked. In the case of the short-cycle operation as described above, it is possible to compensate for the disadvantage that the hot water is not produced during the cooling in the existing heat pump, so that a separate heat pump or other heat source boiler is not required in the three- Cold water and hot water at the same time.

Accordingly, in the present invention, hot water production is performed in a bicycle cycle at the time of heating in the winter, and only the low-stage compressor is operated in the spring, summer, and autumn image zones to produce hot water while performing cooling, So that the utilization rate is high.

In the defrosting operation (cold water operation), the refrigerant gas discharged from the low-stage side compressor 200 is separated from the oil separator 205 along the sixth conduit 20 and flows along the seventh conduit 21 Directional valve 210 and is diverted from the four-way valve 220 along the eighth duct 22 to the high-temperature and high-pressure gas in the pin-tube heat exchanger 230 along the sixteenth duct 30 And passes through the fourth check valve 290 along the fifteenth conduit 29 and through the cascade heat exchanger 130 along the tenth conduit 24 to the eleventh conduit 25, Is passed through the filter dryer 250 along the twelfth conduit 26 and expanded along the thirteenth conduit 27 by the low-stage expansion valve 260, 28 through the fifth check valve 280 and heat exchange in the cold water producing heat exchanger 300 along the 21st pipeline 31 and the 22nd pipeline 32 and the 9th pipeline 23, Directional valve 220 to separate the liquid from the liquid separator 330 along the seventeen conduit 35 and suck it into the low-stage compressor 200 along the eighteenth conduit 36 to circulate Continue.

In the short cycle operation, when the temperature of the hot water produced by the heat exchange of the refrigerant gas discharged from the low-stage side compressor reaches a predetermined temperature, the refrigerant gas discharged from the low-stage side compressor flows into the low- It is preferable to switch to the defrosting operation in which cold water is produced by passing through a FIN-TUBE heat exchanger without passing through the heat exchanger.

Accordingly, the switching from the three-way valve 210 to the defrosting operation, which is the cold water operation, is facilitated by simple switching of the three-way valve 210 in the short-cycle operation in which hot water and cold water are simultaneously produced during cooling.

Herein, the air-heat cycle heat pump operating system includes a hot-water supply and heating facility such as a bathing facility, accommodation (motel, hotel, dormitory, pension, multi-dwelling) business facilities and facilities, nursing facility, hospital, gardening facility, religious facility, , And hot water and cold water are always produced and supplied effectively in a place where a cooling facility is needed. In particular, the initial investment cost is low and the operation power ratio is greatly reduced.

Therefore, it is possible to greatly reduce the power cost by allowing the heat pump, which has been operated in the four seasons bicycle cycle to produce hot water, to operate in a single cycle during the three seasons in which the image volume is maintained throughout the year and to produce hot water while cooling. The operation of the single cycle can be automatically and conveniently switched to improve the convenience of the user, and the quality of the heat pump product can be improved to enhance the purchasing power of the consumer.

While the illustrative embodiments of the present invention have been shown and described, various modifications and alternative embodiments may be made by those skilled in the art. Such variations and other embodiments will be considered and included in the appended claims, all without departing from the true spirit and scope of the invention.

10: first conduit 11: second conduit
12: third pipeline 13: fourth pipeline
14: fifth pipe 20: sixth pipe
21: seventh channel 22: eighth channel
23: 9th conduit 24: 10th conduit
24: eleventh pipeline 26: twelfth pipeline
27: 13th conduit 28: 14th conduit
29: 15th conduit 30: 16th conduit
35: 17th conduit 36: 18th conduit
33: 19th conduit 34: 20th conduit
31: 21st conduit 32: 22nd conduit
100: high-stage side compressor 110: hot water producing heat exchanger
120: High-stage side expansion valve 130: Cascade heat exchanger
200: low-stage compressor 210: three-way valve
220: four-way valve 230: pin-tube heat exchanger
240: Receiver 250: Lower stage expansion valve
310: first check valve 270: second check valve
320: third check valve 290: fourth check valve
280: fifth check valve

Claims (3)

delete delete The refrigerant gas discharged from the high-stage side compressor 100 circulates and is again sucked into the high-stage side compressor 100 and continues to circulate. The refrigerant gas discharged from the low-stage side compressor 200 circulates, ) In which the heat pump is operated in the sub-winter period in a manner that continues to circulate;
The refrigerant gas discharged from the low-stage side compressor 200 is heat-exchanged in the low-temperature heat exchanger to produce hot water. The reduced-pressure refrigerant gas is evaporated by heat exchange with the air in the FIN-TUBE type heat exchanger 230, (CASCADE) heat exchanger 130 and then condensed to be stored in a receiver 240 and further decompressed to produce cold water through the cold water producing heat exchanger 300 and then sucked into the lower stage compressor 200 A single cycle operation in which the heat pump is operated so that hot water and cold water are simultaneously produced in spring, summer, and autumn image volumes; And
The high-temperature refrigerant gas discharged from the low-stage side compressor 200 is decompressed to defrost the pin-tube air phase of the fin-tube heat exchanger 230 and is condensed and stored in the receiver 240, And a defrosting operation (cold water operation) in which the heat pump is operated so as to be evaporated in the heat exchanger 300 and then sucked into the low-stage side compressor 200,
In the dual cycle operation,
The refrigerant discharged from the high-stage side compressor 100 is separated from the oil separator 105 along the first pipeline 10 and the hot water is heated in the hot water production heat exchanger 110 along the second pipeline 11 Condensed and expanded at the high stage side expansion valve 120 along the third pipeline 12 and heat exchanged with the high temperature gas of the low stage side compressor 200 at the cascade heat exchanger 130 along the fourth pipeline 13 The refrigerant is evaporated and sucked into the high-stage side compressor 100 along the fifth duct 14 to continue the circulation,
The refrigerant gas discharged from the low-stage side compressor 200 is separated from the oil separator 205 along the sixth line 20 and is diverted from the three-way valve 210 along the seventh line 21, Way valve 220 along the conduit 22 and along the ninth conduit 23 through the first check valve 310 and along the tenth conduit 24 to the cascade heat exchanger 130 Is condensed by the evaporative gas of the high-stage compressor 100 and is stored along the eleventh duct 25 in the receiver 240 and passes through the filter dryer 250 along the twelfth duct 26, Is expanded at the lower expansion valve 260 along the line 13 and along the line 14 to the second check valve 270 along the line 14 and along the line 15 to the pin- Directional valve 220 along the sixteenth conduit 30 and flows through the liquid separator 330 along the seventeen conduit 35 to flow the liquid Separated and sucked into the low-stage side compressor (200) according to claim 18, the channel 36 and thereby continue the cycle,
In the short cycle operation, the refrigerant gas discharged from the low-stage side compressor 200 is separated from the oil separator 205 along the sixth pipe 20, and the refrigerant gas discharged from the three-way valve 210 And the hot water is heat-exchanged in the middle and lower season hot water producing heat exchanger 140 along the 19th pipeline 33 and the third check valve 320 is formed along the 20th pipeline 34 Exchanges heat with the air in the fin-tube heat exchanger (230) along the sixteenth conduit (30), and flows into the fifth conduit (29) through the fourth conduit (22) Passes through the fourth check valve 290 and passes along the tenth conduit 24 through the cascade heat exchanger 130 and is stored in the receiver 240 along the eleventh conduit 25, The refrigerant passes through the 12th duct 26 through the filter dryer 250 and is expanded at the lower expansion valve 260 along the 13th pipeline 27 and along the 14th pipeline 28 to the 5th check The cold water producing heat exchanger 300 generates cold water through the valve 280 and the cold water producing heat exchanger 300 along the 21st pipeline 31 to generate cold water in the four directions along the 22nd channel 32 and the 9th channel 23, The liquid is separated from the liquid separator 330 along the seventeenth duct 35 and sucked into the low-stage compressor 200 along the eighteenth duct 36 to continue the circulation,
In the defrosting operation, the refrigerant gas discharged from the low-stage side compressor 200 is separated from the oil separator 205 along the sixth line 20 and is discharged from the three-way valve 210 along the seventh line 21 Direction heat exchanger 230 is deflected by the high-temperature high-pressure gas in the pin-tube heat exchanger 230 along the sixteenth conduit 30 by turning the four-way valve 220 along the eighth conduit 22, 15 passage 29 along a fourth check valve 290 and along a tenth conduit 24 through the cascade heat exchanger 130 and along the eleventh conduit 25 to the receiver 240, Passes through the filter dryer 250 along the twelfth conduit 26 and is expanded in the low-stage expansion valve 260 along the thirteenth conduit 27 and flows through the fourth conduit 28 along the fourth conduit 28, Way valve 31 and the heat exchanger 300 for cold water production along the twenty-first duct 31 and the four-way valve 32 220, the liquid is separated in the liquid separator 330 along the seventeenth duct 35, and is sucked into the low-stage compressor 200 along the eighteenth duct 36 to continue the circulation,
In the short-cycle operation, when the temperature of the hot water produced by the heat exchange in the middle- and low-season hot water producing heat exchanger 140 reaches a predetermined temperature, the refrigerant gas discharged from the low- The refrigerant gas discharged from the side compressor 200 is separated from the oil separator 205 along the sixth line 20 and is diverted from the three-way valve 210 along the seventh line 21, Way heat exchanger 230 along the sixteenth conduit 30 by turning the four-way valve 220 along the eighth conduit 22 without passing through the seasonal hot water producing heat exchanger 140, To the defrosting operation in which the cold water is produced.

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