KR20100045171A - Apparatus for controlling heat pump system and method thereof - Google Patents

Apparatus for controlling heat pump system and method thereof Download PDF

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Publication number
KR20100045171A
KR20100045171A KR1020080104244A KR20080104244A KR20100045171A KR 20100045171 A KR20100045171 A KR 20100045171A KR 1020080104244 A KR1020080104244 A KR 1020080104244A KR 20080104244 A KR20080104244 A KR 20080104244A KR 20100045171 A KR20100045171 A KR 20100045171A
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KR
South Korea
Prior art keywords
compressor
indoor unit
heat pump
pump system
capacity
Prior art date
Application number
KR1020080104244A
Other languages
Korean (ko)
Inventor
진동식
Original Assignee
위니아만도 주식회사
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Publication date
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Priority to KR1020080104244A priority Critical patent/KR20100045171A/en
Publication of KR20100045171A publication Critical patent/KR20100045171A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B30/00—Heat pumps
    • F25B30/02—Heat pumps of the compression type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General 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
    • F25B2400/07—Details of compressors or related parts
    • F25B2400/075—Details of compressors or related parts with parallel compressors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/024—Compressor control by controlling the electric parameters, e.g. current or voltage

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The present invention relates to an operation control apparatus and method for a heat pump system that improves heating efficiency by controlling a compressor operating capacity in cold conditions, and confirms whether cold conditions are satisfied during heating operation, and when the cold conditions are satisfied, It calculates the required load of the indoor unit, it characterized in that the compressor is started with a larger operating capacity than the operating capacity to meet the required load of the indoor unit to operate. According to the present invention configured as described above, it is possible to maintain the excellent heating efficiency without the auxiliary heater by starting the compressor with a higher capacity than the capacity of the indoor unit during heating operation in cold climate conditions.

Description

Apparatus for controlling heat pump system and method

The present invention relates to a heat pump system, and more particularly, to an operation control apparatus and method of a heat pump system for improving heating efficiency by controlling the compressor operation capacity in cold conditions.

In general, a heat pump system is connected to a compressor that compresses a refrigerant, and is connected to a compressor and a pipe and acts as a condenser in the cooling operation mode, and is connected to an outdoor heat exchanger and a compressor and the pipe in the cooling operation mode. An indoor heat exchanger which acts as an evaporator in the heating operation mode and a condenser valve which supplies high temperature and high pressure refrigerant discharged from the compressor to an outdoor heat exchanger in the cooling operation mode and an indoor heat exchanger in the heating operation mode. Equipped.

Such a heat pump system is capable of both cooling and heating by reversing the flow of refrigerant in a cooling cycle of an air conditioner, and thus its use area is gradually expanding according to the advantages that can be used regardless of season.

In particular, the heat pump system starts the compressor in proportion to the capacity of the indoor unit under cold conditions, and sets the capacity of the compressor in proportion to the capacity of the indoor unit to selectively operate the compressor according to whether the indoor unit is operated. For example, when the first room is operated, the first compressor is started, and when the second room is operated, the second room is started to reach the target temperature set by the user.

The foregoing description has been described for the purpose of understanding the present invention, and does not imply a prior art that is well known in the art.

In the conventional heat pump system, the capacity of the compressor is operated 1: 1 in proportion to the required load of the indoor unit under cold conditions. In this case, the heating efficiency was lowered and the auxiliary heater was operated to heat the heating efficiency.

The present invention was devised to improve the above-mentioned problem, and a heat that can maintain excellent heating efficiency without an auxiliary heater by starting the compressor with a larger operating capacity than the operating capacity required for the required load of the indoor unit when heating operation in cold climate conditions An apparatus and method for controlling operation of a pump system.

The present invention devised to achieve the above object is as follows.

The operation control apparatus of the heat pump system of the present invention is configured to start with a larger operating capacity than an indoor unit for condensing the refrigerant to increase the room temperature and an operating capacity for meeting the required load of the indoor unit, and supply the compressed refrigerant to the indoor unit. And a control unit for calculating the required load of the indoor unit to be operated among the indoor units when the cold and cold conditions are satisfied during the heating operation, and for starting the compressor with a larger operating capacity than the operating capacity for satisfying the required load of the indoor unit to be operated. Characterized in that.

The compressor is a variable compressor, the compressor is at least one, in this case at least one of the compressor is characterized in that the variable compressor.

The indoor unit is characterized in that at least one or more.

The control unit is set hysteresis for the change in the operating capacity of the compressor, the hysteresis is characterized in that the required load amount of the indoor unit to operate is 5000W.

The operation control method of the heat pump system of the present invention checks whether the cold condition is satisfied during heating operation, and if the cold condition is satisfied, the required load amount of the indoor unit to be operated is calculated and the required load amount of the indoor unit to be operated is met. It characterized in that it comprises the step of starting the compressor with a larger operating capacity than the operating capacity to.

The compressor may be a variable compressor, or at least one of the compressor, characterized in that at least one of the compressor is a variable compressor.

The indoor unit is characterized in that at least one or more.

The operating capacity change hysteresis of the compressor is set according to the required load amount of the indoor unit to operate, and the hysteresis is characterized in that the required load amount of the indoor unit to operate is 5000W.

According to the present invention configured as described above, it is possible to maintain the excellent heating efficiency without the auxiliary heater by starting the compressor with a higher capacity than the capacity of the indoor unit during heating operation in cold climate conditions.

Hereinafter, an operation control apparatus and method of a heat pump system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a circuit diagram of a heat pump system according to an embodiment of the present invention.

As shown in FIG. 1, a heat pump system according to an exemplary embodiment of the present invention includes an outdoor unit 100 and an indoor unit 200, and the indoor unit 200 includes a first indoor unit 210 and a second indoor unit 220. It is provided.

The outdoor unit 100 is connected to the first compressor 120, the second compressor 130, and the condenser in the cooling operation mode through the refrigerant pipes 121 and 131 branched from the accumulator 110 to compress the refrigerant at high temperature and high pressure. It is connected to the outdoor heat exchanger 170, the indoor heat exchanger 170 and the four-way valve 160 to act as an evaporator in the heating operation mode to prevent the liquid refrigerant is sucked into the first and second compressors (120, 130) Connected to the accumulator 110 and the first compressor 120 to prevent the refrigerant discharged from the first compressor 120 to flow back, the check valve 150, the second compressor 130 is connected to the cooling operation mode or heating Four-way valve 140 for opening and closing the transfer of the refrigerant discharged from the second compressor 130 according to the operation mode, the outdoor heat exchanger 170 that acts as an evaporator in the cooling operation mode and the condenser in the heating operation mode, indoor heat exchange Accumulate the refrigerant discharged from the machine 170 And an electronic expansion valve 180 for controlling the opening caliber of the refrigerant supplied from the four-way valve 160 and the indoor unit 200 to be supplied to 110.

The indoor unit 200 includes a first indoor unit 210 and a second indoor unit 220, and the first indoor unit 210 and the second indoor heat exchanger 220 function as an evaporator in a cooling operation mode and in a heating operation mode. Act as a condenser

Meanwhile, in addition to the above components, the heat pump system further includes a check valve for preventing backflow of the refrigerant, a solenoid valve for opening and closing the transfer of the refrigerant, and a capillary tube for converting the refrigerant into a low pressure liquid refrigerant. It is usually installed in the system, and can be easily implemented by those skilled in the art, so the detailed description thereof is omitted here.

In particular, the first compressor 120 and the second compressor 130 are configured with different operating capacities, the first compressor 120 of the first indoor unit 210 and the second indoor unit 220 It is composed of a driving capacity that can meet all of the required load amount, the second compressor 220 is composed of an operating capacity that can satisfy the required load amount of at least one of the first room 210 and the second room 220. do. Accordingly, both the first indoor unit 210 and the second indoor unit 220 may be operated by starting the first compressor 120, and the first indoor unit 210 and the second indoor unit may be operated by starting the second compressor 130. Any one of 220 may be driven.

According to the configuration of the operation capacity of the compressor, when only one of the first indoor unit 210 and the second indoor unit 220 is operated in consideration of the outside temperature during the heating operation in cold conditions, the first compressor 120 is started. When both the first indoor unit 210 and the second indoor unit 220 are operated, both the first compressor 120 and the second compressor 130 are started to operate the first indoor unit 210 and the second indoor unit 220. It is possible to obtain high heating efficiency by operating with high operating capacity compared to the required load.

2 is a block diagram of an operation control apparatus of a heat pump system according to an exemplary embodiment of the present invention.

The operation control apparatus of the heat pump system according to the embodiment of the present invention is the key operation of the first indoor unit 210, the second indoor unit 220, the first compressor 120 and the second compressor 130 and the user. Key input unit 320 for generating a variety of key signals according to the outdoor temperature sensor 310 for sensing the outside temperature and the control unit 300 for controlling the overall operation control device of the heat pump system.

When the user selects the heating operation through the key input unit 320, the controller 300 checks whether the outside air temperature input from the outdoor temperature sensor 310 corresponds to a cold weather condition through the reference temperature or less. That is, if the outside temperature is below the reference temperature, it is determined as a cold condition.

If the cold condition is satisfied, the control unit 300 inputs a key for driving the indoor unit through the key input unit 320, and when at least one indoor unit of the first indoor unit 210 and the second indoor unit 220 operates, At least one of the first compressor (120) and the second compressor (130) is selectively started, wherein the first compressor is operated according to the required load of the first indoor unit 210 and / or the second indoor unit 220. At least one of the 120 and the second compressor 130 is started.

In this case, when only one of the first indoor unit 210 and the second indoor unit 220 is operated, the first compressor 120 is started, and both the first indoor unit 210 and the second indoor unit 220 are operated. In this case, both the first compressor 120 and the second compressor 130 are started.

Here, the first compressor 120 is configured with an operating capacity capable of meeting both the required loads of the first room 210 and the second room 220, the second compressor 220 is the first room ( At least one of the 210 and the second indoor 220 is composed of a driving capacity that can meet the required load amount.

Therefore, when the first compressor 120 starts to operate, when the first compressor 120 starts up, it starts with a larger operating capacity than a driving capacity required for the required load of the first indoor unit 210, thereby obtaining a high heating effect. Will be. In addition, when the first indoor unit 210 and the second indoor unit 220 are operated, when both the first compressor 120 and the second compressor 130 operate, both the first compressor 120 and the second compressor 130 Is activated, both the first compressor 120 and the second compressor 130 are started with a larger operating capacity than the operating capacity required for the required load of the first indoor unit 210 and the second indoor unit 220, thereby providing a high heating effect. Will be obtained.

For reference, a method of calculating the required load of the indoor unit is generally a technique currently employed in an air conditioner, and thus can be easily implemented by those skilled in the art, and thus a detailed description thereof will be omitted.

In addition, the control unit 300 may change hysteresis of operating capacity of the first compressor 120 and the second compressor 130 according to the required loads of the first indoor unit 220 and the second indoor unit 230, for example, 5000 W is set. In order to control the start of the first compressor 120 and the second compressor 130 within the range of the operating capacity change hysteresis.

3 is a flowchart of an operation control method of a heat pump system according to an exemplary embodiment of the present invention.

In the operation control method of the heat pump system according to an embodiment of the present invention, when the first user performs a heating operation by operating the key input unit 320 (S10), the outside air temperature input from the outdoor temperature sensor 310 is a reference temperature example. For example, check whether it is below -2 ℃ and check whether it meets cold conditions.

At this time, if the cold conditions are satisfied, it is checked whether the first indoor unit 210 and the second indoor unit 220 are operated (S20, S30).

Here, when the first indoor unit 210 operates, the required load amount for operating the first indoor unit 210 is calculated (S22), and the first compressor 120 is started (S24) according to the required load amount. At this time, the first compressor 120 starts with a larger driving capacity than the driving capacity required for the required load of the first indoor unit 210. This is the same when the second indoor unit 220 is driving.

Meanwhile, when the first indoor unit 210 and the second indoor unit 220 are operated, a required load amount for operating the first indoor unit 210 and the second indoor unit 220 is calculated (S32), and the first indoor unit 210 and the second indoor unit 220 are operated according to the required load amount. The first compressor 120 and the second compressor 130 are started (S34). At this time, the first compressor 120 and the second compressor 130 are started with a larger operating capacity than the driving capacity required for the required load of the first indoor unit 210 and the second indoor unit 220.

In addition, the control unit 300 calculates the required load of the first room 220 and the second room 230, the first compressor 120 in accordance with the required load of the first room 220 and the second room 230 And operating capacity change hysteresis of the second compressor 130, for example, 5000 W is set to control the starting of the first compressor 120 and the second compressor 130 within the range of the operating capacity change hysteresis. do.

That is, the operation control method of the heat pump system according to the embodiment of the present invention is a heat pump system having a first compressor 120, a second compressor 130, a first indoor unit 210 and the second indoor unit 220. In the configuration, the minimum operating capacity of the first compressor 120 is configured to satisfy the sum of the required loads of the first indoor unit 210 and the second indoor unit 220, and the operating capacity of the second compressor 130 is set to the first. An indoor unit of one of the first indoor unit 210 and the second indoor unit 220 is configured with a driving capacity that meets the required load of at least one indoor unit of the indoor unit 210 and the second indoor unit 220 during heating operation in cold climate conditions. Is operated, the first compressor 120 is started, and if both the first room 210 and the second room 220 are operated, both the first compressor 120 and the second compressor 130 are started to provide excellent heating effect. To get.

In the present embodiment, the number of the compressor and the indoor unit are two examples, but the technical scope of the present invention is not limited thereto, and at least one of the compressor and the indoor unit may be installed. In addition, the compressor has been described as an example of the constant speed compressor, but the technical scope of the present invention is not limited thereto, and includes at least one of the first compressor and the second compressor including a variable compressor using an inverter.

Each case will be described by way of example. First, when there is one variable compressor and at least one indoor unit, the operation capacity of the variable compressor is configured to exceed the total load requirement of the total indoor unit load requirements. Accordingly, if at least one indoor unit is operated during cold operation under cold conditions, the variable compressor is started with an operating capacity exceeding the load requirement of the indoor unit to be operated, and if all the indoor units are operated afterwards, the loads of the respective indoor unit load requirements are summed. It will be possible to start the variable compressor with an operating capacity exceeding the required amount.

On the other hand, when at least one or more of the plurality of compressors is a variable compressor and at least one indoor unit, the operating capacity of the constant speed type compressor and the variable compressor is configured to exceed the load requirements of the total indoor unit load requirements. Accordingly, when at least one indoor unit is operated during the heating operation in cold conditions, the constant speed type compressor and the variable type compressor have an operating capacity that exceeds the load requirement of the indoor unit operating among the constant speed type compressor and the variable type compressor according to the load demand of the indoor unit to be operated. The compressor may be selectively started, and then, depending on whether each indoor unit is operated, the constant speed type compressor and the variable type compressor may be started with an operating capacity exceeding the load requirement for each load of the indoor unit in operation.

Although the present invention has been described with reference to the embodiments shown in the drawings, it is merely exemplary and various modifications and equivalent other embodiments are possible to those skilled in the art. Will understand. Therefore, the technical protection scope of the present invention will be defined by the claims.

1 is a circuit diagram of a heat pump system according to an embodiment of the present invention.

2 is a block diagram of an operation control apparatus of a heat pump system according to an exemplary embodiment of the present invention.

3 is a flowchart of an operation control method of a heat pump system according to an exemplary embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

120: first compressor 130: second compressor

210: first room 220: second room

300: control unit 310: outdoor temperature sensor

Claims (14)

An indoor unit condensing the refrigerant to increase an indoor temperature; A compressor configured to start with a larger operating capacity than a driving capacity that satisfies the required load of the indoor unit to supply a compressed refrigerant to the indoor unit; And Heat pump including a control unit for calculating the required load of the indoor unit to operate in the indoor unit when the cold conditions are satisfied during heating operation, and for starting the compressor with a larger operating capacity than the operating capacity to meet the required load of the indoor unit to operate Operation control unit of the system. 2. The operation control apparatus of a heat pump system according to claim 1, wherein the compressor is a variable compressor. 2. The operation control apparatus of a heat pump system according to claim 1, wherein the compressor is at least one. 4. The operation control apparatus of a heat pump system according to claim 3, wherein at least one of the compressors is a variable compressor. The apparatus of claim 1, wherein at least one indoor unit is used. The apparatus of claim 1, wherein the control unit is configured to set hysteresis with respect to a change in operation capacity of the compressor. 7. The operation and control apparatus of a heat pump system according to claim 6, wherein the hysteresis is a demand load of the indoor unit for driving. Checking whether the cold conditions are satisfied during the heating operation; And If the cold conditions are satisfied, calculating the required load of the indoor unit to operate, the operation control method of the heat pump system comprising the step of starting the compressor with a larger operating capacity than the operating capacity that satisfies the required load of the indoor unit to operate . 9. The operation control apparatus of a heat pump system according to claim 8, wherein the compressor is a variable compressor. 9. The operation control apparatus of a heat pump system according to claim 8, wherein the compressor is at least one. 11. The operation control apparatus of a heat pump system according to claim 10, wherein at least one of the compressors is a variable compressor. 9. The operation control apparatus of a heat pump system according to claim 8, wherein at least one indoor unit is at least one. The operation control apparatus of a heat pump system according to claim 8, wherein the hysteresis of an operation capacity change of the compressor is set according to the required load of the indoor unit to operate. The operation control apparatus of a heat pump system according to claim 13, wherein the hysteresis is a demand load of the indoor unit for driving.
KR1020080104244A 2008-10-23 2008-10-23 Apparatus for controlling heat pump system and method thereof KR20100045171A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180114303A (en) * 2017-04-10 2018-10-18 현대자동차주식회사 Heat pump system for vehicle and control method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180114303A (en) * 2017-04-10 2018-10-18 현대자동차주식회사 Heat pump system for vehicle and control method thereof

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