KR100738343B1 - Method for controlling compound air conditioning system - Google Patents

Abstract

A controlling method of a compound air conditioning system is provided to install a refrigerant circulation device in a cooling device and to operating the cooling device and the refrigerant circulation device with an optimum mode. A controlling method of a compound air conditioning system includes the steps of setting an indoor temperature, detecting the indoor temperature, comparing the preset indoor temperature and the detected indoor temperature, operating a first mode if the detected indoor temperature is larger than the preset indoor temperature + 2°C, operating a second mode if the detected indoor temperature is equal to or larger than the preset indoor temperature - 2°C and is equal to or smaller than the preset indoor temperature + 2°C, and operating a third mode if the detected indoor temperature is equal to or larger than the preset indoor temperature - 3°C and is smaller than preset indoor temperature - 2°C.

Description

Control Method for Compound Air Conditioning System {Method for Controlling Compound Air Conditioning System}

1 is a schematic view showing the operation of the combined air conditioning system according to the first mode of the present invention;

2 is a schematic view showing the operation of the combined air conditioning system according to the second mode of the present invention;

3 is a schematic view showing the operation of the combined air conditioning system according to a third mode of the present invention;

Figure 4 is a block diagram showing a control method of a complex air conditioning system according to the present invention.

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

10: first cooling device 10a: second cooling device

11: compressor 15: four-way valve

20: indoor unit 25: expansion valve

30: outdoor unit 33: fan

40: refrigerant line 45: refrigerant storage tank

47: filter

50: brine refrigerant circulation device 51: storage tank

55: pump 60: heat transfer

70: indoor side heat exchanger 73: fan

75: first line 77: first valve

80: outdoor side heat exchanger 85: second line

87: second valve 100: composite air conditioning system

The present invention relates to a control method of a complex air conditioning system, and more particularly, to configure a brine refrigerant circulator in a cooling device that is operated simultaneously or alternately, so that the operation of the cooling device and the brine refrigerant circulation device is measured and set. The present invention relates to a control method of a complex air conditioning system, which can reduce the amount of power consumed by being performed by each mode optimized according to the room temperature and the outside temperature.

In general, an air conditioner is a device for maintaining a room temperature at an appropriate temperature.

A typical example of such an air conditioner is a cooling system. The cooling system includes a compressor for compressing a refrigerant at a high temperature and a high pressure, a condenser for heat condensing the compressed refrigerant with outdoor air, an expansion valve for depressurizing the refrigerant from the condenser, and a heat exchanged refrigerant with indoor air. It has a basic configuration consisting of an evaporator to evaporate.

In addition, in recent years, the development of a heat pump system capable of reverse cycle operation by switching the refrigerant movement direction of the cooling system has been actively made.

The heat pump system adds a four-way valve to the configuration of the existing cooling system to change the direction of movement of the refrigerant, if necessary, so that cooling and heating are selectively performed.

By the way, the conventional cooling system and the heat pump system as described above takes a lot of power during operation due to the relatively large load of the cooling and heating in the environment with a large seasonal temperature change, as in Korea.

Accordingly, there is a demand for development of a technology related to a heat pump and a cooling system and an efficient control method thereof, which can reduce power requirements and operate more actively according to temperature.

The present invention has been made to solve the above problems, an object of the present invention is to configure a brine refrigerant circulation device in the cooling device which is operated simultaneously or mutually alternating, and thus the driving of the cooling device and the brine refrigerant circulation device is It is to provide a control method of a complex air conditioning system that can be performed by each mode optimized according to the room temperature and the ambient temperature to be measured and set to reduce the amount of power required.

The present invention for solving the above problems comprises a first cooling device and a second cooling device, each comprising a compressor, outdoor unit, indoor unit, expansion valve; A plurality of heat transfer devices communicating with the storage tank in which the brine refrigerant is stored, and coupled to the indoor units of the first cooling unit and the second cooling unit, respectively, to allow the brine refrigerant to be circulated therein to be cooled, and from the heat transfer unit. An indoor side heat exchanger installed at the indoor side to exchange the brine refrigerant with the indoor air, and an outdoor side connected in parallel on the brine refrigerant moving path between the storage tank and the heat transfer unit so that the brine refrigerant circulated therein is exchanged with the outdoor air. 100. A combined air conditioning system (100) comprising a heat exchanger and a brine refrigerant circulation device (100) installed on a brine refrigerant moving path between the indoor heat exchanger and the outdoor heat exchanger and a storage tank to control the flow of the brine refrigerant. ), The room temperature is measured and the measured room temperature and the set room temperature In comparison, the set values of the outside air temperature are switched to different first, second, and third modes according to the comparison between the temperatures, and when the measured room temperature is lower than a predetermined temperature, the first air conditioner and the second air conditioner and the brine Stopping operation of the refrigerant circulation device, each mode comprising: an initial operation step of selectively or both operating the first cooling device, the second cooling device, and the brine refrigerant circulation device; Measures the outside air temperature and the temperature of the brine refrigerant discharged from the indoor heat exchanger of the brine refrigerant circulation device and compares the measured outside air temperature with the temperature of the brine refrigerant, and the temperature of the brine refrigerant measured from the measured outside air temperature is constant. If it is higher than the above, the flow of the brine refrigerant to the outdoor heat exchanger is allowed by the opening / closing operation of the valve. If the temperature of the brine refrigerant is lower than the measured outside temperature or not higher than a predetermined value, Comparing the determination step of blocking the flow; characterized in that made, including.

The present invention having such a feature will be more clearly described through the preferred embodiment accordingly.

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

1 is a schematic diagram showing the operation of a complex air conditioning system according to a first mode of the present invention, Figure 2 is a schematic diagram showing the operation of a complex air conditioning system according to a second mode of the present invention, Figure 3 is A schematic diagram showing the operation of the combined air conditioning system according to the third mode.

As shown, the complex air conditioning system 100 provided for the present invention is largely composed of a first cooling device 10, a second cooling device 10a, a brine refrigerant circulation device (50).

In the following description, since the first cooling device 10 and the second cooling device 10a are identical in structure and structure to each other, they differ only in the entire street number, and the same number is attached to the corresponding components. In addition, the first cooling device 10 and the second cooling device 10a may be a conventional cooling system for cooling. However, in the present embodiment, the first cooling device 10 and the second cooling device 10a may be applied. It is noted that the cooling device 10 and the second cooling device 10a include four-way valves to enable reverse cycle operation.

The first cooling device 10 and the second cooling device 10a are configured individually, including the following components.

That is, the first and second cooling devices 10a mainly include a compressor 11, an indoor unit 20, an outdoor unit 30, a four-way valve 15, an expansion valve 25, and a refrigerant line 40 communicating with them. It is set as a configuration.

The compressor 11 compresses the refrigerant to a high temperature and a high pressure, and the indoor unit 20 and the outdoor unit 30 are installed at the indoor and outdoor sides, respectively, to allow the refrigerant to exchange heat with indoor air or outdoor air. In the above, although the indoor unit 20 is illustrated as being installed indoors, the indoor unit 20 may be installed in a space on the outdoor side disconnected from the outdoor air.

The four-way valve 15 allows the refrigerant compressed by the compressor 11 to be selectively moved to the indoor unit 20 or the outdoor unit 30 in accordance with a mode change of cooling and heating, thereby substantially cooling and heating. It will determine the operation.

The expansion valve 25 allows the refrigerant moved to the indoor unit 20 or the outdoor unit 30 to expand and decompress according to the cooling and heating modes.

Reference numerals "33", "45", and "47" denote a fan, a refrigerant storage tank, and a filter, respectively, wherein the fan 33 is attached to an outdoor unit, and the refrigerant and outdoor air circulated inside the outdoor unit 30 and the air. Function to increase the heat exchange efficiency of the refrigerant, the refrigerant storage tank 45 is to allow the refrigerant to be stored when not in operation, the filter 47 is installed on the refrigerant path of the refrigerant line 40 is the refrigerant Remove any foreign objects or moisture from the

Hereinafter, the brine refrigerant circulation device 50 will be described.

The brine refrigerant circulation device 50 includes a storage tank 51, a heat transfer device 60, a pump 55, an indoor side heat exchanger 70, an outdoor side heat exchanger 80, a first valve 77, and a first valve 77. It includes two valves (87).

The storage tank 51 stores a brine refrigerant, and the heat transfer device 60 includes a plurality of heat transfer units, and heat transfer is possible to the indoor units 20 of the first cooling device 10 and the second cooling device 10a, respectively. It is coupled to, so that the brine refrigerant circulated therein is cooled. At this time, it is natural that the heat transfer devices 60 should communicate with the storage tank 51 to circulate the brine refrigerant therein. In addition, the pump 55 is provided between the storage tank 51 and the heat transfer device 60 to impart a movement force for circulation to the brine refrigerant. In addition, the indoor heat exchanger 70 is provided in the room to communicate with the heat transferrs 60 so that the brine refrigerant moved from the heat transferrs 60 may exchange with the indoor air.

The storage tank 51, the heat transfer device 60, the pump 55, and the indoor heat exchanger 70 are all communicated through the first line 75.

On the other hand, on the brine refrigerant flow path between the storage tank 51 and the heat transfer device 60, the outdoor side heat exchanger 80 is connected in parallel so that the brine refrigerant moved therein heat exchanges with the outdoor air. In this case, the parallel communication of the outdoor heat exchanger 80 may be performed by connecting the second line 85 to the first line 75. Here, the start point P1 and the end point P2 connected to the first line 75 of the second line 85 are located in a section between the heat transfer devices 60 and the storage tank 51.

In addition, a first valve 77 and a second valve 87 are respectively installed on the first line 75 and the second line 85 to interrupt the flow of the brine refrigerant by a selective opening and closing operation.

That is, the first valve 77 is installed in the first line 75 so as to be located on the brine refrigerant path between the storage tank 51 and the outdoor heat exchanger 80, and more specifically, the first valve (77). The second line 85 of the line 75 is installed so as to be located at the starting point P1 and the end point P2.

In addition, the second valve 87 may be located in the second line 85 to be located on the brine refrigerant path between the storage tank 51 and the heat transfer devices 60, and more preferably, in the second line 85. It is installed close to the point of time connected to the first line 75 of 85.

Reference numeral “73” denotes a fan 73 attached to the indoor heat exchanger 70 and the outdoor heat exchanger 80 of the brine refrigerant circulation device 50, respectively, and indicates heat exchange efficiency between indoor and outdoor air and the refrigerant. It functions to increase.

On the other hand, although not shown, the composite air conditioning system 100 from the indoor heat exchanger 70 of the temperature sensor and the brine refrigerant circulation device 50 installed in the indoor and outdoor respectively to measure the indoor temperature and the outside temperature It includes a temperature sensor installed in the room (preferably in the section between the indoor heat exchanger and the storage tank of the first line) to measure the temperature of the discharged brine refrigerant, and set the initial room temperature and the outside air temperature, It compares the set temperature of the air and the outside air with the measured temperature, and further includes control means for automatically operating the system operation.

Hereinafter, a control method of a complex air conditioner system having the above configuration and structure will be described.

Figure 4 is a block diagram showing a control method of a complex air conditioning system according to the present invention.

Initial room temperature is set and measured. The room temperature set here corresponds to a desired room temperature, and in this embodiment, 26 ° C. is applied. In addition, the measured room temperature means the current room temperature.

When the room temperature is set and measured as described above, the control means compares the measured room temperature (hereinafter, measured room temperature) with the set room temperature (hereinafter, set room temperature) and sets the outside air temperature according to the comparison between the temperatures. Switch to the other 1,2,3 modes. In addition, when the measured indoor temperature is equal to or less than a predetermined temperature (−3 ° C. in this embodiment), the operation of the first cooling device 10, the second cooling device 10a, and the brine refrigerant circulation device 50 is stopped. .

Each operation mode will be described below.

Prior to the description, the switching to the first, second and third modes may vary according to the measurement and the set value of the room temperature, but in the present embodiment, the first mode is the measured room temperature> the set room temperature + 2 ° C. The second mode corresponds to the case where the set room temperature -2 ° C ≤ the measured room temperature ≥ the set room temperature + 2 ° C, respectively, and the third mode is the set room temperature -3 ° C ≤ the measured room temperature <set room temperature The case is -2 ℃.

The first mode is to operate both the first cooling device 10, the second cooling device 10a, and the brine refrigerant circulation device 50 (wherein the operation of the brine refrigerant circulation device means driving of the pump). Initial startup phase,

The outside air temperature and the temperature of the brine refrigerant discharged from the indoor heat exchanger 70 of the brine refrigerant circulation device 50 are measured, and the measured outside air temperature is compared with the temperature of the brine refrigerant, and the measured brine is measured from the outside air temperature. If the temperature of the coolant is higher than a predetermined value, the flow of the brine coolant to the outdoor heat exchanger 80 is allowed by the opening / closing operation of the valves 77 and 87, and the measured temperature of the brine coolant is lower than the measured ambient temperature. If not higher than a predetermined value is made of a comparative determination step of blocking the flow of the brine refrigerant to the outdoor heat exchanger (80).

Here, the measured temperature of the brine refrigerant is higher than the measured outside air temperature by a predetermined value or more means that the measured temperature of the brine refrigerant is at least 3 ° C. or more higher than the measured outside air temperature.

That is, when T1-3 ≥ T2 in the comparison determination step, the flow of the brine refrigerant to the outdoor side heat exchanger 80 is allowed,

If T1-3 <T2, the flow of the brine refrigerant to the outdoor heat exchanger 80 is blocked. Here, T1 is the measured brine refrigerant temperature, and T2 is the measured outside air temperature (hereinafter, the same).

In the above-described comparative determination step, blocking and allowing the flow of the brine refrigerant to the outdoor side heat exchanger 80 are implemented by opening and closing operations of the first valve 77 and the second valve 87.

In detail, when the first valve 77 is opened and the second valve 87 is closed, the brine refrigerant moves directly from the storage tank 51 to the heat transfer devices 60, and the first valve 77. ) And the second valve 87 is opened, and the brine refrigerant is transferred from the storage tank 51 through the second line 85 to the outdoor heat exchanger 80 and again through the first line 75. (60) (Hereinafter, the description of the opening and closing operation of the first valve and the second valve will be avoided.)

The second mode, like the first mode, is made of an initial operation step, a comparative determination step,

In the initial operating step, the first cooling device 10 and the second cooling device 10a are alternately operated, and as in the first mode in the comparison determination step,

If T1-3 ≥ T2, allow flow of the brine refrigerant to the outdoor side heat exchanger 80,

If T1-3 <T2, the flow of the brine refrigerant to the outdoor heat exchanger 80 is blocked.

On the other hand, the third mode is made of the initial operation step, the comparative determination step, as in the first mode and the second mode described above,

In the initial operation stage, only the brine refrigerant circulation device 50 is operated,

If T1-1 ≥ T2, allow flow of the brine refrigerant to the outdoor heat exchanger 80,

If T1-1 <T2, the flow of the brine refrigerant to the outdoor heat exchanger 80 is blocked.

After the comparison determination step is performed in each of the above-described modes, the process of selectively switching back to the respective modes by repeatedly measuring the room temperature regardless of the opening / closing operation of the valves 77 and 87 is repeated.

As described above, the present invention constitutes a brine refrigerant circulator in a cooling device that is operated simultaneously or alternately, and according to the room temperature and the outside air temperature at which the operation of the cooling device and the brine refrigerant circulator are measured and set. It is possible to reduce the amount of power consumed by being performed by each optimized mode.

Claims (4)

A first cooling device 10 and a second cooling device 10a each including a compressor 11, an outdoor unit 30, an indoor unit 20, and an expansion valve 25; The brine refrigerant is stored in communication with the storage tank 51 and coupled to the indoor unit 20 of the first cooling unit 10 and the second cooling unit 10a so as to be heat transfer, respectively, so that the brine refrigerant circulated therein is cooled. A plurality of heat transfer unit 60, the indoor heat exchanger 70 is installed on the indoor side so that the brine refrigerant from the heat transfer unit 60 is heat exchanged with the indoor air, and the brine refrigerant circulated therein with the outdoor air. The outdoor side heat exchanger 80 and the indoor side heat exchanger 70 and the outdoor side heat exchanger 80 communicated in parallel on the brine refrigerant path between the storage tank 51 and the heat transfer unit 60 to exchange heat. And a brine refrigerant circulation device (50) installed on the brine refrigerant path between the storage tank (51) and including valves (77,87) for controlling the flow of the brine refrigerant; As a control method of the composite air conditioning system 100, By measuring the room temperature and comparing the measured room temperature and the set room temperature, the set value of the outside air temperature is switched to different first, second, and third modes according to the comparison between the temperatures, and the measured room temperature is below a certain temperature. On the back, the operation of the first cooling device 10 and the second cooling device (10a) and the brine refrigerant circulation device 50 is stopped, Each mode An initial operation step of selectively or all operating the first cooling device 10, the second cooling device 10a, and the brine refrigerant circulation device 50; The outside air temperature and the temperature of the brine refrigerant discharged from the indoor heat exchanger 70 of the brine refrigerant circulation device 50 are measured, and the measured outside air temperature is compared with the temperature of the brine refrigerant, and the measured brine is measured from the outside air temperature. If the temperature of the coolant is higher than a predetermined value, the flow of the brine coolant to the outdoor heat exchanger 80 is allowed by the opening / closing operation of the valves 77 and 87, and the measured temperature of the brine coolant is lower than the measured ambient temperature. Comparative determination step of blocking the flow of the brine refrigerant to the outdoor heat exchanger 80 if not higher than a predetermined value; Control method of a complex air conditioning system, characterized in that made. The method of claim 1, In the first mode, all the first cooling device 10, the second cooling device 10a and the brine refrigerant circulation device 50 are operated in the initial operation step. In the comparison judgment step If T1-3 ≥ T2, allow flow of the brine refrigerant to the outdoor side heat exchanger 80, And if T1-3 &lt; T2, the flow of the brine refrigerant to the outdoor heat exchanger (80) is blocked. Where T1 is the measured brine refrigerant temperature and T2 is the measured ambient temperature. The method of claim 1, In the second mode, the first cooling device 10 and the second cooling device 10a and the brine refrigerant circulation device 50 are all operated in the initial operation step, but the first cooling device 10 and the second cooling device are operated. Operating the devices 10a alternately, In the comparison judgment step If T1-3 ≥ T2, allow flow of the brine refrigerant to the outdoor side heat exchanger 80, And if T1-3 &lt; T2, the flow of the brine refrigerant to the outdoor heat exchanger (80) is blocked. Where T1 is the measured brine refrigerant temperature and T2 is the measured ambient temperature. The method of claim 1, In the third mode, only the brine refrigerant circulation device 50 is operated in the initial operation step, In the comparison judgment step If T1-1 ≥ T2, allow flow of the brine refrigerant to the outdoor side heat exchanger 80, And if T1-1 &lt; T2, control the flow of the brine refrigerant to the outdoor heat exchanger (80). Where T1 is the measured brine refrigerant temperature and T2 is the measured ambient temperature.

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