KR101737980B1 - Auto-driving transfer system of heat pump - Google Patents

Abstract

Provided is an automatic operation switching system of a heat pump to reduce power costs by operating a heat pump in a dual cycle in winter at a temperature below zero and operating the heat pump in a single cycle in the rest of the season at a temperature above zero, wherein the heat pump produces hot water. The automatic operation switching system of a heat pipe comprises: a dual cycle operation; a single cycle operation; and a defrosting operation (cold water operation). In winter at a temperature below zero, the heat pump is operated in the dual cycle operation to make refrigerant gas, discharged from a high-stage side compressor, circulated and again sucked into the high-stage side compressor for continuous circulation and make refrigerant gas, discharged from a low-stage side compressor, circulated and again sucked into the low-stage side compressor for continuous circulation. In spring, summer, and autumn at a temperature above zero, the heat pump is operated in the single cycle operation to make the refrigerant gas, discharged from the low-stage side compressor heat hot water in a low-stage side heat exchanger, stored in a receiver after passing through a cascade heat exchanger, evaporated by heat exchange with air in a pin-tube type heat exchanger, and sucked into the low-stage side compressor for continuous circulation. The heat pump is operated in the defrosting operation to make high-temperature refrigerant gas, discharged from the low-stage side compressor, defrosted and condensed in the pin-tube type heat exchanger, stored in the receiver, evaporated in the low-stage side heat exchanger, and sucked into the low-stage side compressor.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an automatic operation switching system for a heat pump,

Disclosed is an automatic operation switching system for 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.

It provides an automatic operation switching system of the heat pump which can reduce the power cost by operating the heat pump which produces the hot water in a dual cycle in winter and a single cycle in the season of the remaining image volume.

In the automatic operation switching system of the heat pump, the refrigerant gas discharged from the high-stage side compressor circulates and is again sucked into the high-stage side compressor and continues to circulate. The refrigerant gas discharged from the low- A two-cycle cycle in which the heat pump is operated in the sub-winter period in such a manner that the cycle continues; The refrigerant gas discharged from the low-stage side compressor heats the hot water in the low-stage side heat exchanger, passes through a cascade heat exchanger, is stored in a receiver, and is discharged from a FIN-TUBE type heat exchanger A short cycle operation in which the heat pump is operated in the spring, summer, and autumn image winds, which are evaporated by heat exchange with air and then sucked into the low-stage compressor and continue to circulate; And a high-temperature refrigerant gas discharged from the low-stage side compressor is defrosted and condensed in a fin-tube heat exchanger of the fin-tube type heat exchanger and stored in the receiver, evaporated in the low-stage heat exchanger, And a defrosting operation (cold water operation) in which the pump is operated.

In the two-cycle operation, the refrigerant gas discharged from the high-stage compressor passes through the high-stage side heat exchanger, the high-stage side expansion valve and the cascade heat exchanger, and is sucked back to the high-

In the two-cycle operation, the refrigerant gas discharged from the low-stage side compressor is condensed by the evaporation gas of the high-stage side compressor in the cascade heat exchanger and is stored in the receiver. After passing through the low-stage expansion valve and the pin- And then sucked back to the low-stage side compressor and circulated.

According to this system, the heat pump, which has been operated in the four seasons bicycle cycle to produce hot water, can be operated in a single cycle in the three seasons in which the image volume is kept 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, thereby enhancing the purchasing power of the consumer.

FIG. 1 is a view schematically showing an automatic operation switching system of a heat pump according to the present embodiment.

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 schematically showing an automatic operation switching system of a heat pump according to the present embodiment.

As shown in FIG. 1, a system for switching the automatic operation of a heat pump operating in a dual cycle in the cold winter season and a single cycle in the spring, summer, and autumn of the remaining image wind is disclosed.

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

Here, the specific configuration of the automatic operation switching system of the heat pump 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, ) Is circulated while being sucked into the low-stage side compressor (200) to continue the circulation, and the heat pump is operated in the sub-zero period in winter. The refrigerant gas discharged from the low-stage compressor 200 heats the hot water in the low-stage heat exchanger 290, passes through the cascade heat exchanger 130, is stored in the receiver 240, Cycle operation in which the heat pump is operated in the spring, summer, and autumn image regions where the refrigerant is sucked into the low-stage side compressor 200 in a state where the refrigerant is evaporated by heat exchange with air in the compressor 230, And the high-temperature refrigerant gas discharged from the low-stage side compressor 200 are defrosted and condensed and stored in the receiver 240, and the low-stage side heat exchanger 290 And a defrosting operation (cold water operation) in which the heat pump is operated so as to be sucked into the low-stage side compressor 200 again.

In the dual cycle operation, the refrigerant gas discharged from the high-stage compressor 100 is sequentially passed through the high-stage side 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, the power cost can be greatly reduced by operating the four-seasons bicycle in a single cycle during the four-seasons bicycle cycle operation through the automatic operation switching system of the heat pump.

The automatic operation switching system of the heat pump 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 heats the hot water in the high-stage heat exchanger 110 along the first pipeline 11 and is condensed into the second pipeline 12, Side expansion valve 120 and is evaporated by heat exchange with the high-temperature gas of the low-stage side compressor 200 in the cascade heat exchanger 130 along the third duct 13 to form the fourth pipe 14 And is then sucked into the high-stage side compressor 100 to continue the circulation.

The refrigerant gas discharged from the low-stage compressor 200 is diverted from the four-way valve 210 along the fifth duct 21 and is diverted from the three-way valve 220 along the sixth duct 22, Is condensed by the evaporative gas of the high-stage side compressor (100) in the cascade heat exchanger (130) along the seventh duct (23), stored in the receiver (240) along the eighth duct (24) Is expanded in the low-stage expansion valve 250 along the conduit 25 and is passed along the tenth conduit 26 through the first check valve 260 and flows along the eleventh conduit 27 to the fin- Way valve 210 along the twelfth conduit 28 and sucked into the low-stage compressor 200 along the thirteenth conduit 29 to circulate the refrigerant in the low- Continue.

In the case of the short cycle operation, the refrigerant gas discharged from the low-stage side compressor 200 is diverted from the four-way valve 210 along the fifth duct 21 and flows along the sixth duct 22 The hot water is heated by the low-stage side heat exchanger 290 along the fourteenth duct 30 and is then passed through the fourth check valve 300 along the fifteenth duct 31 Passes through the cascade heat exchanger 130 along the seventh conduit 23 and is stored in the receiver 240 along the eighth conduit 24 and flows along the ninth conduit 25 to the bottom Is expanded in the side expansion valve 250 and passes along the tenth conduit 26 through the first check valve 260 and through the fin-tube heat exchanger 230 along the eleventh conduit 27 to heat exchange with air Directional valve 210 along the twelfth conduit 28 and sucked into the low-stage compressor 200 along the thirteenth conduit 29, The will to continue.

In the defrosting operation (cold water operation), the high-temperature refrigerant gas discharged from the low-stage side compressor 200 is diverted in the four-way valve 210 along the fifth line 21, Tubes of the fin-tube heat exchanger 230 along the first conduit 28 and condensed to pass along the eleventh conduit 27 and through the second check valve 270 and along the eighth conduit 24, Is expanded in the low-stage expansion valve 250 along the ninth conduit 25 and passes through the third check valve 280 along the tenth conduit 26, is stored in the receiver 240, Directional heat exchanger 290 along the third line 31 and is diverted in the three-way valve 220 along the fourteenth line 30 to the four-way valve 210 The refrigerant is sucked into the low-stage compressor 200 along the thirteenth duct 29.

Here, the automatic operation switching system of the heat pump can be applied to various kinds of facilities such as bathing facilities, accommodation (motel, hotel, dormitory, pension, multi-dwelling) business facilities and facilities, nursing facilities, hospitals, gardening facilities, religious facilities, It is advantageous in that hot water and cold water are always efficiently produced and supplied to a place where a cooling facility is needed, and in particular, the initial investment cost is low and the operation power ratio is drastically reduced.

Therefore, it is possible to greatly reduce the power cost by operating the heat pump, which has been operated in the four seasons bicycle cycle to produce hot water, in a single cycle in the three seasons in which the image volume is maintained throughout the year, and the two- The convenience of the user can be improved, 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.

11: first conduit 12: second conduit
13: third pipeline 14: fourth pipeline
21: fifth pipe 22: sixth pipe
23: seventh channel 24: eighth channel
25: 9th conduit 26: 10th conduit
27: eleventh pipeline 28: twelfth pipeline
29: 13th conduit 30: 14th conduit
31: Fifteenth pipeline 100: High-stage side compressor
110: High-stage side heat exchanger 120: High-stage side expansion valve
130: Cascade heat exchanger 200: Lower stage compressor
210: 4-way valve 220: 3-way valve
230: pin-tube heat exchanger 240: receiver
250: lower stage expansion valve 260: first check valve
270: second check valve 280: third check valve
290: Low-stage heat exchanger 300: Fourth 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 compressor 200 heats the hot water in the low-stage heat exchanger 290, passes through the cascade heat exchanger 130, is stored in the receiver 240, Cycle operation in which the heat pump is operated in the spring, summer, and autumn image regions where the refrigerant is sucked into the low-stage side compressor 200 in a state where the refrigerant is evaporated by heat exchange with air in the compressor 230, And
The high-temperature refrigerant gas discharged from the low-stage side compressor 200 is defrosted and condensed and stored in the receiver 240, and the high-temperature refrigerant gas discharged from the low-stage side heat exchanger 290, And a defrosting operation (cold water operation) in which the heat pump is operated so as to be evaporated and then sucked into the low-stage side compressor 200,
In the dual cycle operation,
The refrigerant gas discharged from the high-stage side compressor 100 is sequentially passed through the high-stage side heat exchanger 110, the high-stage side expansion valve 120 and the cascade heat exchanger 130, The refrigerant gas discharged from the high-stage side compressor 100 is heated and condensed in the high-stage side heat exchanger 110 along the first pipe line 11, Is expanded at the side expansion valve 120 and is evaporated by heat exchange with the hot gas of the low-stage side compressor 200 in the cascade heat exchanger 130 along the third pipeline 13 and flows along the fourth pipeline 14 The refrigerant is sucked into the high-stage side compressor 100 and circulated,
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 gas discharged from the low-stage side compressor 200 is sucked and circulated through the low-stage side compressor 200 while passing through the pin-tube heat exchanger 230 and the pin- Directional valve 220 in the cascade heat exchanger 130 along the sixth line 22 to be diverted in the three-way valve 220 and in the cascade heat exchanger 130 along the seventh line 23 to the high- Is condensed by the evaporation gas and is stored in the receiver 240 along the eighth duct 24 and is expanded in the lower expansion valve 250 along the ninth duct 25 and the 10th duct 26 is expanded Passes through the first check valve 260 and is heat-exchanged with the air in the fin-tube heat exchanger 230 along the eleventh line 27 And is circulated by being diverted from the four-way valve 210 along the twelfth conduit 28 and being sucked into the low-stage compressor 200 along the thirteenth conduit 29,
In the short cycle operation, the refrigerant gas discharged from the low-stage side compressor 200 is diverted from the four-way valve 210 along the fifth duct 21, The hot water is heated by the low-stage heat exchanger 290 along the fourteenth duct 30 and then flows through the fourth check valve 300 along the fifteenth duct 31, The refrigerant passes through the cascade heat exchanger 130 along the seventh duct 23 and is stored in the receiver 240 along the eighth duct 24 and flows along the ninth duct 25 to the low- Is expanded in the first heat exchanger 250 and passes through the first check valve 260 along the tenth conduit 26 and evaporates by heat exchange with air in the fin-tube heat exchanger 230 along the eleventh conduit 27 Way valve 210 along the twelfth conduit 28 and sucked into the low-stage compressor 200 along the thirteenth conduit 29 to circulate the refrigerant,
In the defrosting operation, the high-temperature refrigerant gas discharged from the low-stage side compressor 200 is diverted in the four-way valve 210 along the fifth line 21 and flows along the twelve- The tube-shaped heat exchanger 230 is defrosted and condensed to pass along the eleventh pipeline 27 through the second check valve 270 and stored in the receiver 240 along the eighth pipeline 24 Expansion valve 250 along the ninth conduit 25 and the third check valve 280 along the tenth conduit 26 and flows along the fifth conduit 31 to the bottom Side heat exchanger 290 and is diverted from the three-way valve 220 along the fourteenth conduit 30 to be turned at the four-way valve 210 along the sixth conduit 22, And is sucked into the low-stage side compressor (200) along the conduit (29).

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