KR101533112B1 - Heat pump system and method for controlling the same - Google Patents

Heat pump system and method for controlling the same Download PDF

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Publication number
KR101533112B1
KR101533112B1 KR1020080082880A KR20080082880A KR101533112B1 KR 101533112 B1 KR101533112 B1 KR 101533112B1 KR 1020080082880 A KR1020080082880 A KR 1020080082880A KR 20080082880 A KR20080082880 A KR 20080082880A KR 101533112 B1 KR101533112 B1 KR 101533112B1
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KR
South Korea
Prior art keywords
heating
refrigerant
working fluid
heat
heating device
Prior art date
Application number
KR1020080082880A
Other languages
Korean (ko)
Other versions
KR20100024157A (en
Inventor
장성민
이재원
유윤호
Original Assignee
엘지전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to KR1020080082880A priority Critical patent/KR101533112B1/en
Publication of KR20100024157A publication Critical patent/KR20100024157A/en
Application granted granted Critical
Publication of KR101533112B1 publication Critical patent/KR101533112B1/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B13/00Compression machines, plant or systems with reversible cycle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2313/00Compression machines, plant, or systems with reversible cycle not otherwise provided for
    • F25B2313/008Refrigerant heaters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2400/00General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/04Refrigeration circuit bypassing means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2500/00Problems to be solved
    • F25B2500/31Low ambient temperatures
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2700/00Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21Temperatures
    • F25B2700/2106Temperatures of fresh outdoor air
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2700/00Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21Temperatures
    • F25B2700/2117Temperatures of an evaporator
    • F25B2700/21175Temperatures of an evaporator of the refrigerant at the outlet of the evaporator

Abstract

The present invention relates to a heat pump system and a control method thereof. In the present invention, the refrigerant circulating in the air conditioner during the heating operation is heat-exchanged with the working fluid heated by the heating device, and the operation of the heating device is controlled according to the temperature of the working fluid. Therefore, according to the present invention, there is an advantage that various types of heating means can be easily used as a heating device for heating a refrigerant.
Heat pump, air conditioner, heating device, refrigerant, working fluid

Description

[0001] Heat pump system and method for controlling same [0002]

The present invention relates to a heat pump system, and more particularly, to a heat pump system including a heating device for heating a refrigerant during a heating operation and a control method thereof.

Generally, the heat pump system includes a compressor, a four-way valve, an indoor heat exchanger, and an outdoor heat exchanger that constitute a heat exchange cycle for cooling or heating the room. During the heating operation, the outdoor heat exchanger operates as an evaporator, and the indoor heat exchanger operates as an expander. More specifically, the refrigerant heat-exchanged with the outdoor air while being evaporated in the outdoor heat exchanger is compressed at a high temperature and a high pressure in the compressor, expanded in the indoor heat exchanger, and heat-exchanged with indoor air, thereby heating the room.

However, in the conventional heat pump system, when the outdoor temperature is extremely low, efficient evaporation of the refrigerant in the outdoor heat exchanger operating as an evaporator may not be achieved. Accordingly, there is a disadvantage that the heating efficiency is lowered due to ineffective evaporation of the refrigerant.

It is an object of the present invention to provide a heat pump system and a control method thereof that are configured to enable more efficient heating.

According to an aspect of the present invention, there is provided an air conditioner for cooling or heating a space by heat exchange between circulating refrigerant, outdoor air, and indoor air; A heating unit for heating the working fluid, and a heat exchanging unit for exchanging heat between the working fluid heated by the heating unit and the refrigerant; And the heating unit is stopped when the temperature of the working fluid reaches a predetermined reference temperature or more.

According to another embodiment of the present invention, there is provided a method of controlling an air conditioner, comprising the steps of: (A) (B) heat-exchanging a working fluid heated by the heating device with a refrigerant circulating through the air conditioner; And (C) stopping the heating device when the temperature of the working fluid reaches a predetermined reference temperature or more; .

According to the present invention, there is an advantage that more efficient heating is possible.

Hereinafter, embodiments of a heat pump system according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a view showing an embodiment of a heat pump system according to the present invention.

Referring to FIG. 1, the heat pump system according to the present invention includes an air conditioning apparatus 100 and a heating apparatus 200. The air conditioner 100 is provided with various components for cooling or heating. The heating device 200 serves to heat a refrigerant circulating through the air conditioner 100 during a heating operation.

More specifically, the air conditioner 100 includes an outdoor unit 110 and an indoor unit 120. The outdoor unit 110 is provided with various components including an outdoor heat exchanger (not shown) and a compressor (not shown). The indoor unit 120 is provided with various components including an indoor heat exchanger (not shown). The outdoor heat exchanger is operated as a condenser during cooling operation and as an evaporator during heating operation. The indoor heat exchanger is operated as an evaporator during cooling operation and as a condenser during heating operation. In the present embodiment, the number of the outdoor units 110 is one, and the number of the indoor units 120 is plural, but it is not limited thereto. In other words, the number of the outdoor units 110 may be plural, or the number of the indoor units 120 may correspond to one or the number of the outdoor units 110.

The outdoor unit (110) and the indoor unit (120) are connected to the refrigerant pipe (130). The refrigerant pipe 130 is a place where the refrigerant circulating through the outdoor unit 110 and the indoor unit 120 flows. Although not shown, the outdoor unit 110 and the indoor unit 120 are connected by a power line and a communication line for transmission and communication of power between the outdoor unit 110 and the indoor unit 120.

Meanwhile, the outdoor unit 110 is provided with a bypass pipe 111. The bypass pipe 111 serves to bypass the refrigerant circulating in the air conditioning apparatus 100 to the heat exchanging unit 230 to be described later. A valve 113 is installed in the bypass pipe 111. The valve 113 is opened when the refrigerant circulating in the refrigerant pipe 130 is circulated through the bypass pipe 111 or the bypass pipe 111 depending on whether the heating device 200 is used or whether the heating device 200 heats the refrigerant. ). ≪ / RTI >

The heating device 200 includes a fluid pipe 210, a heating unit 220, a heat exchanging unit 230, a pump 240, and a sensor 250. The fluid tube 210 is where the working fluid flows. The heating unit 220 substantially heats the working fluid flowing through the fluid pipe 210 to generate heat. As the heating unit 220, for example, a common boiler may be used. The heat exchanger 230 transfers heat generated in the heating unit 220 to the refrigerant. More specifically, the heat exchanging unit 230 heats the refrigerant by exchanging heat between the working fluid heated by the heating unit 220 and the refrigerant circulating through the air conditioning unit 100. For this, the working fluid flowing through the fluid pipe 210 and the refrigerant flowing through the bypass pipe 111 heat-exchange with each other while passing through the heat exchanging part 230. A heat transfer medium for heat exchange between a refrigerant flowing through the bypass pipe 111 and a working fluid flowing through the fluid pipe 210 may be provided in the heat exchanging unit 230. The pump 240 functions to pump the working fluid to circulate the fluid tube 210. The sensor 250 senses the temperature of the working fluid flowing through the fluid tube 210. The sensor 250 may be installed at one side of the fluid pipe 210 to sense the temperature of the working fluid heated by the heating unit 220 and flowing to the heat exchanging unit 230. have.

Hereinafter, a method of controlling a heat pump system according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a control flowchart showing an embodiment of a control method of a heat pump system according to the present invention.

2, first, the air conditioner 100 is heated (S11). At this time, the outdoor heat exchanger and the indoor heat exchanger of the air conditioner 100 are operated as an evaporator and a condenser, respectively.

When the air conditioner 100 operates in the heating mode, it is determined whether or not the refrigerant circulating in the air conditioner 100 needs to be heated. (S13) Whether the heating of the refrigerant is necessary may be determined, for example, Is determined to be equal to or less than a predetermined temperature, that is, whether or not sufficient evaporation of the refrigerant is not performed in the outdoor heat exchanger.

When it is determined in step S13 that the refrigerant needs to be heated, the heating apparatus 200 is operated. (S15) In more detail, the heating unit 220 is turned on to heat the working fluid. The heated working fluid flows through the fluid pipe 210 and passes through the heat exchanging part 230. The refrigerant circulating in the air conditioning apparatus 100, more specifically, the refrigerant evaporated in the outdoor heat exchange and transferred to the compressor flows through the bypass pipe 111 by opening the valve 113, (230). Thus, heat exchange is performed between the refrigerant and the working fluid, thereby heating the working fluid.

 Meanwhile, in a state where the heating device 200 is operated, the sensor 250 senses the temperature of the working fluid. Then, it is determined whether or not the temperature of the working fluid exceeds a preset reference temperature (S17)

If it is determined in step S17 that the temperature of the working fluid exceeds the reference temperature, the heating apparatus 200 is stopped. This is to prevent the refrigerant from being overheated by heating the working fluid by the heating device 200 irrespective of the amount of heat required by the air conditioning system 100. Also, when the heating device 200 is stopped, the valve 113 is closed and the bypass of the refrigerant through the bypass pipe 111 is stopped.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims and their equivalents. .

According to the heat pump system and control method of the present invention configured as described above, the following effects can be expected.

First, in the present invention, the refrigerant evaporated in the outdoor heat exchanger is heated by the heating device. Accordingly, the temperature of the refrigerant transferred to the compressor during the heating operation is increased, so that the heating can be efficiently performed.

In the present invention, the heating device is turned on / off according to the temperature of the working fluid flowing through the heating device. Accordingly, the refrigerant is prevented from being overheated by the heating device, thereby preventing damage to the heat pump system.

Further, according to the present invention, the operation of the heating device, substantially the operation of the heating part is controlled in accordance with the temperature of the working fluid heated by the heating part. Therefore, even if various kinds of heating means, for example, a boiler, are used as the heating portion, the heating portion can be easily controlled.

1 is a view showing an embodiment of a heat pump system according to the present invention;

2 is a control flowchart showing an embodiment of a control method of a heat pump system according to the present invention.

Claims (8)

  1. An air conditioning device for cooling or heating the space by heat exchange between circulating refrigerant, outdoor air, and indoor air;
    A heating device for heating a working fluid for heat-exchanging with a refrigerant circulating in the air conditioning device to heat the refrigerant in a heating operation, the operation being controlled according to a temperature of the working fluid; And
    And a bypass pipe selectively bypassing the refrigerant for heat exchange with the working fluid,
    Wherein when the temperature of the working fluid exceeds a predetermined reference temperature, the heating device is stopped and the bypass pipe is closed.
  2. delete
  3. The method according to claim 1,
    The air-
    At least one outdoor unit in which an outdoor heat exchanger and a compressor are installed; And
    At least one indoor unit in which an indoor heat exchanger is installed; . ≪ / RTI >
  4. The method according to claim 1,
    The heating device includes:
    A heating unit for heating the working fluid; And
    A heat exchange unit for exchanging heat between the working fluid heated by the heating unit and the refrigerant; . ≪ / RTI >
  5. delete
  6. (A) the air conditioning apparatus performs heating operation;
    (B) heating the refrigerant by heat exchange with a refrigerant circulating through the air conditioner, the working fluid heated by the heating device;
    (C) stopping the heating device when the temperature of the working fluid reaches a predetermined reference temperature or more; And
    (D) closing the bypass valve for bypassing the refrigerant to the heating device.
  7. The method according to claim 6,
    In the step (B)
    Wherein the heating device is operated only when heating of the refrigerant is required.
  8. 8. The method of claim 7,
    In the step (B)
    Wherein the necessity of heating the refrigerant is determined in consideration of a difference between a refrigerant circulating through the air device and an outdoor temperature.
KR1020080082880A 2008-08-25 2008-08-25 Heat pump system and method for controlling the same KR101533112B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020080082880A KR101533112B1 (en) 2008-08-25 2008-08-25 Heat pump system and method for controlling the same

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR1020080082880A KR101533112B1 (en) 2008-08-25 2008-08-25 Heat pump system and method for controlling the same
US12/457,644 US20100043465A1 (en) 2008-08-25 2009-06-17 Heat pump system and method of controlling the same
EP09163649A EP2159515A3 (en) 2008-08-25 2009-06-24 Heat pump system and method of controlling the same
CN 200910139925 CN101660851A (en) 2008-08-25 2009-07-15 Heat pump system and method of controlling the same

Publications (2)

Publication Number Publication Date
KR20100024157A KR20100024157A (en) 2010-03-05
KR101533112B1 true KR101533112B1 (en) 2015-07-02

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US (1) US20100043465A1 (en)
EP (1) EP2159515A3 (en)
KR (1) KR101533112B1 (en)
CN (1) CN101660851A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102283283B (en) * 2011-05-30 2013-05-01 广西大学 Intelligentized superficial geothermal energy low-temperature grain storage system
EP2631565B1 (en) 2012-02-24 2018-10-10 Airbus Operations GmbH Cooling system for operation with a two-phase refrigerant
US20150253020A1 (en) * 2012-10-10 2015-09-10 Mitsubishi Electric Corporation Air-conditioning apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5883061U (en) * 1981-12-02 1983-06-04
JPH0480560A (en) * 1990-07-20 1992-03-13 Matsushita Electric Ind Co Ltd Refrigerant heating type air conditioner and starting method therefor

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4165037A (en) * 1976-06-21 1979-08-21 Mccarson Donald M Apparatus and method for combined solar and heat pump heating and cooling system
US4338790A (en) * 1980-02-21 1982-07-13 The Trane Company Control and method for defrosting a heat pump outdoor heat exchanger
US5878810A (en) * 1990-11-28 1999-03-09 Kabushiki Kaisha Toshiba Air-conditioning apparatus
JPH11108485A (en) * 1997-09-30 1999-04-23 Matsushita Electric Ind Co Ltd Method for controlling air conditioner and outlet temperature of refrigerant heater
DE19813674C1 (en) * 1998-03-27 1999-04-15 Daimler Chrysler Ag Air conditioner for motor vehicle interior
JP3939445B2 (en) * 1998-08-05 2007-07-04 カルソニックカンセイ株式会社 Air conditioner for automobile
US6118099A (en) * 1998-11-12 2000-09-12 Daimlerchrysler Corporation Controller for heating in reversible air conditioning and heat pump HVAC system for electric vehicles
JP2004268752A (en) * 2003-03-10 2004-09-30 Denso Corp Heat management system
KR100511286B1 (en) * 2003-05-01 2005-08-31 엘지전자 주식회사 Air conditioner capable of defrosting and heating operation simultaneously and out door unit with self defrosting cycle for air conditioner
JP4654655B2 (en) * 2004-10-19 2011-03-23 株式会社デンソー Vapor compression refrigerator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5883061U (en) * 1981-12-02 1983-06-04
JPH0480560A (en) * 1990-07-20 1992-03-13 Matsushita Electric Ind Co Ltd Refrigerant heating type air conditioner and starting method therefor

Also Published As

Publication number Publication date
KR20100024157A (en) 2010-03-05
EP2159515A2 (en) 2010-03-03
US20100043465A1 (en) 2010-02-25
EP2159515A3 (en) 2011-03-02
CN101660851A (en) 2010-03-03

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