KR101824031B1 - Energy saving cooling system equipped with inverter compressor - Google Patents

Abstract

The present invention relates to a water cooled-cooling system equipped with an inverter compressor, for reduced energy, lower noise and four-season use, and more specifically, relates to a water cooled-cooling system comprising: compressors (111a, 112a); water cooled-condensers (111b, 112b); expansion valves (111c, 112c); a blower fan (Fn); and a glycol cooler (122) cooling the water cooled-condensers (111b, 112b) by supplying cold water to the water cooled-condensers (111b, 112b). The water cooled-cooling system further comprises: an indoor temperature sensor (141) measuring an indoor temperature; a control part (140) generating an inverter signal proportional to the value of a received indoor temperature to be output to an inverter (150) when the indoor temperature received from the indoor temperature sensor (141) is higher than a first indoor temperature, which is present; the inverter (150) calculating an operation voltage and an operation frequency (Hz) of the compressors (111a and 112a) based on an inverter control signal input from the controller (140) and outputting a compressor drive control signal to the compressors (111a and 112a) based on the calculated operation voltage and calculated operation frequency. The compressors (111a, 112a) are driven in accordance with the compressor drive control signal output from the inverter (150). According to the present invention, the water cooled-cooling system has an advantage that power consumption can be reduced by controlling the compressor.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an energy-saving low-noise, four-seater water-cooled cooling system having an inverter compressor,

The present invention relates to a water-cooled cooling system, and more particularly, to an inverter-controlled compressor which can protect the compressor and reduce the power consumption of the cooling system by a simple configuration, Energy-saving low-noise, four-seater water-cooled cooling system equipped with an inverter compressor.

Generally, in order to perform indoor cooling, an indoor unit that absorbs heat in a room and supplies cooled cold air, and an outdoor unit that phase-changes a refrigerant gas supplied from the indoor unit to a refrigerant liquid and discharges waste heat of high temperature and high pressure.

The outdoor unit has an air-cooled type that is cooled with air and a water-cooled type that is cooled with water (cooling water) in accordance with the method of cooling the condenser.

The air-cooled condenser is used in a separate operation mode. It is a cooling system that is suitable for an environment with a short piping distance, and a cooling system that is not suitable for a large building because of a problem of efficiency reduction when the piping distance is long.

In the case of a water-cooled condenser, there are an open type cooling tower type and a closed type glycol cooler type.

The outdoor unit has an air-cooled type that is cooled with air and a water-cooled type that is cooled with water (cooling water) in accordance with the method of cooling the condenser.

The air-cooled condenser is used in a separate operation mode. It is a cooling system that is suitable for an environment with a short piping distance, and a cooling system that is not suitable for a large building because of a problem of efficiency reduction when the piping distance is long.

In the case of a water-cooled condenser, there are an open type cooling tower type and a closed type glycol cooler type according to the means for supplying cooling water.

In the case of using the glycol cooler, it is possible to perform water-cooling in winter, but in this case, the compressor is driven, which causes a lot of power consumption.

In order to solve such a conventional water-cooling type cooling system, a proposed technique is disclosed in Patent Registration No. 10-1321979 (Oct. 28, 2013) filed and registered by the applicant of the present invention, Cooling device "is known.

The above-mentioned " water-cooled cooling apparatus utilizing cooling water "in the above patent registration No. 10-1321979 is a system in which cooling water is cooled by operating a conventional water-cooling type cooling cycle driven by a compressor in summer and cooling water supplied from a glycol cooler in winter So that it is possible to cool by utilizing the existing cooling water without driving the compressor and without a separate cooling driving source, thereby saving energy by not driving the compressor.

However, the technology of the above-mentioned Patent Registration No. 10-1321979 has a technical limitation that proper cooling technique at the outdoor temperature corresponding to spring and autumn time (springtime) is not presented besides summer and winter.

That is, in summer, cooling cycle is used to cool air, and in winter, cooling water is used to cool air.

In addition, there is a problem that in the summer, energy can not be saved because the air is cooled by the operation of a normal cooling cycle in summer.

In addition, a cooling system for four seasons of environment friendly energy conservation, which is filed and filed by the applicant of the present invention and is registered in Patent Registration No. 10-1105518 (Jan. 13, 2012), has been proposed.

The above-mentioned " environment-friendly energy-saving cooling system for four seasons "in accordance with the above-mentioned Patent Registration No. 10-1105518 provides an external cooler that is interlocked with an internal cooler in the outside, and operates when it is lower than normal temperature in the winter season and spring & Thereby reducing energy consumption.

However, the technology disclosed in the above-mentioned Japanese Patent Application No. 10-1105518 has a problem in that the installation cost of the initial cooling system is increased because a dual installation of an indoor cooler and an outdoor cooler is required.

On the other hand, in an air conditioner, an inverter compressor that controls driving of a compressor by an inverter method is known. However, at present, no water-cooled cooling system adopts an inverter-controlled compressor.

In the case of the compressor of the conventional inverter control system, when the compressor is excessively high or too low, the performance of the compressor deteriorates and causes a failure. However, there is no technique for protecting the compressor at such a high pressure and a low pressure.

Literature 1. Patent Registration No. 10-1321979 (Notification date: October 28, 2013) Document 2. Patent Registration No. 10-1105518 (Notification Date: Jan. 13, 2012)

The object of the present invention is to provide an energy-saving low-noise, four-seater water-cooled cooling system having an inverter compressor according to the present invention,

First, even in a water-cooled cooling system, it is possible to reduce power consumption by controlling a compressor by an inverter,

Second, the low pressure stop pressure set value and the high pressure stop pressure set value of the compressor pressure are set in advance so that the compressor can be stopped when the compressor pressure is equal to or lower than the low pressure stop pressure set value or the high pressure stop pressure set value or more Thereby protecting the compressor,

Third, in the spring and autumn season (Spring and Autumn season), cooling is performed by the cooling water supplied from the glycol coil and the operation by the half of the cooling cycle, so that the cooling efficiency can be maximized while minimizing power consumption,

Fourth, by adopting the very simple configuration [one valve and four piping] of the main valve, the main cold water supply pipe, the cold water outlet pipe, and the first and second cold water supply pipes, cold water of the glycol cooler is directly supplied to the cold water coil The cold water of the glycol cooler is directly supplied to the cold water coils while the cold water that has been heat-exchanged in the cold water coils is supplied to the first and second water-cooled condensers, and in the summer, the cold water is supplied to the first and second water- So that the power consumption can be minimized (cooling energy saving) according to the outside temperature and the cold water temperature, and at the same time, the cooling efficiency can be maximized,

Fifth, by adopting the very simple configuration [one valve and four piping] of the main valve, the main cold water supply pipe, the cold water outlet pipe, and the first and second cold water supply pipes, cold water of the glycol cooler is supplied immediately to the cold water coil The cold water of the glycol cooler is directly supplied to the cold water coils while the cold water that has been heat-exchanged in the cold water coils is supplied to the first and second water-cooled condensers, and in the summer, the cold water is supplied to the first and second water- Cooling system which is provided with an inverter compressor suitable for minimizing an occupied space by making it possible to reduce the installation cost of the cooling system.

In order to achieve the above object, an energy-saving low noise, four-seater water-cooling type cooling system provided with an inverter compressor according to the present invention includes: a cooling cycle including a compressor, a water-cooled condenser, an expansion valve, and an evaporator; And a glycol cooler for cooling the water-cooled condenser by supplying cold water to the water-cooled condenser. The cooling-water cooling system according to claim 1, wherein the water- And an inverter control signal generating unit for generating an inverter control signal proportional to the received room temperature value and outputting the generated inverter control signal to the inverter when the room temperature received from the room temperature sensor is equal to or higher than a predetermined first room temperature The control unit, and the control unit) Further comprising an inverter for calculating an operation voltage and an operation frequency of the compressor based on the signal and for outputting a compressor drive control signal to the compressor based on the calculated operation voltage and the operation frequency, And is driven in accordance with a compressor drive control signal output from the compressor.

The energy-saving low-noise, four-seater water-cooled cooling system having the inverter compressor of the present invention as described above has the following effects.

First, the power consumption can be reduced by controlling the compressor in the water-cooled cooling system.

Second, the low-pressure stop pressure set value and the high-pressure stop pressure set value of the compressor pressure are set in advance, and when the compressor pressure is equal to or lower than the low-pressure stop pressure set value or the high- , And as a result, the compressor can be protected.

Thirdly, there is an effect of maximizing the cooling efficiency while minimizing power consumption by cooling by cold water supplied from the glycol coil and by half of the cooling cycle in the spring (spring and autumn season).

Fourth, by adopting the very simple configuration [one valve and four piping] of the main valve, the main cold water supply pipe, the cold water outlet pipe, and the first and second cold water supply pipes, cold water of the glycol cooler is directly supplied to the cold water coil And cold water of the glycol cooler is directly supplied to the cold water coils while the cold water that has been heat-exchanged in the cold water coils is supplied to the first and second water-cooled condensers. In the summer, cold water is supplied to the first and second water- As a result, there is an effect that power consumption can be minimized (cooling energy saving) according to the outside temperature and the cold water temperature, and at the same time, the cooling efficiency can be maximized.

Fifth, by adopting the very simple configuration [one valve and four piping] of the main valve, the main cold water supply pipe, the cold water outlet pipe, and the first and second cold water supply pipes, cold water of the glycol cooler is supplied immediately to the cold water coil And cold water of the glycol cooler is directly supplied to the cold water coils while the cold water that has been heat-exchanged in the cold water coils is supplied to the first and second water-cooled condensers. In the summer, cold water is supplied to the first and second water- So that the installation cost of the cooling system can be remarkably reduced and the occupied space can be minimized.

FIG. 1 is a block diagram of an energy-saving low noise, four-seater water-cooled cooling system equipped with an inverter compressor and an operation diagram of a forced air conditioning mode (summer air conditioning mode).
2 is a block diagram of a main part of an energy-saving low-noise, four-seater water-cooled cooling system equipped with an inverter compressor.
3 is a main configuration diagram of a front surface of a housing Hs in an energy-saving low-noise, four-seater water-cooled cooling system equipped with an inverter compressor.
4 is a side view of the housing Hs in an energy-saving low-noise, four-seater water-cooled cooling system equipped with an inverter compressor.
5 is an operation diagram of a natural air conditioning mode (winter air conditioning mode) in an energy-saving low noise, four-seater water-cooled air conditioning system equipped with an inverter compressor according to an embodiment of the present invention.
FIG. 6 is an operation diagram of a hybrid air conditioning mode (a daylighting air conditioning mode) in an energy-saving low noise, four-seater water-cooled air conditioning system equipped with an inverter compressor according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of an energy-saving low-noise, four-seater water-cooled cooling system equipped with an inverter compressor according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in the figure, an energy-saving low-noise, four-seater water-cooling type cooling system having an inverter compressor according to an embodiment of the present invention includes compressors 111a and 112a, water-cooled condensers 111b and 112b, expansion valves 111c and 112c, A cooling cycle 110 including evaporators 111d and 112d and a cooling cycle 110 for cooling the cold air generated by the evaporators 111d and 112d after the indoor air is forcedly introduced through the indoor air inlet Ai into the cold air discharge opening Ao And a glycol cooler 122 for cooling the water-cooled condensers 111b and 112b by supplying cold water to the water-cooled condensers 111b and 112b, An indoor temperature sensor 141 installed at one side of the housing Hs or a room R to be cooled and measuring the room temperature and outputting the measured temperature to the control unit 140; a control unit 140; 150), and the compressors (111a, 112a are driven in accordance with a compressor drive control signal output from the inverter (150).

When the room temperature received from the room temperature sensor 141 is equal to or higher than a predetermined first room temperature, the controller 140 generates an inverter control signal proportional to the received room temperature value and outputs the generated inverter control signal to the inverter 150 .

The inverter 150 converts a commercial AC power input from the outside into a DC power and inversely converts the converted DC power into an alternating current having an arbitrary frequency. Based on the inverter control signal input from the controller 140, And outputs the compressor drive control signal to the compressors 111a and 112a based on the calculated operation voltage and the operation frequency.

The inverter control signal generated by the controller 140 is a digital signal proportional to the received room temperature value. The operating voltage and the operating frequency calculated by the inverter 150 are proportional to the room temperature value. Generates a pulse width modulation signal proportional to the magnitude of the calculated operation voltage and the magnitude of the operation frequency and outputs it as a compressor drive signal.

The inverter 150 receives the pressure from the compressors 111a and 112a and outputs the set values of the low pressure stop pressure and the high pressure stop pressure to the compressors 111a and 112b, And outputs a drive control signal for stopping the driving of the compressors (111a, 112a) when the pressure of the compressors (112a, 112a) is equal to or lower than the low pressure stop pressure set value or the high pressure sperm pressure set value.

Thereby, there is an advantage that the compressors 111a and 112a can be protected.

In the energy-saving low-noise, four-seater water-cooled cooling system having an inverter compressor according to an embodiment of the present invention, the cooling cycle 110 is provided in the housing Hs and includes a first compressor A first water-cooled condenser 111b for condensing the refrigerant gas, which has passed through the first compressor 111a and is compressed at a high temperature and a high pressure, into refrigerant by heat exchange with cold water supplied from the glycol cooler 122, A first expansion valve 111c for expanding the refrigerant condensed in the first water-cooled condenser 111b; a second expansion valve 111b for expanding the refrigerant, which is expanded while passing through the first expansion valve 111c, A first heat exchange cycle 111 including a first evaporator 111d for exchanging heat with the first evaporator 111d for generating cold air by phase-changing to a refrigerant gas, a second compressor 112a for compressing the refrigerant gas to high temperature and high pressure, 2 A second water-cooled condenser 112b for condensing the refrigerant gas compressed at a high temperature and high pressure passing through the condenser 112a into refrigerant liquid by heat exchange with cold water supplied from the glycol cooler 122, A second expansion valve 112c for expanding the refrigerant condensed in the first expansion valve 112c; a second expansion valve 112c for expanding the refrigerant condensed in the second expansion valve 112c, And a second heat exchange cycle 112 including a second evaporator 112d for generating cold air and the glycol cooler 122 is connected to the water cooling coils 111b and 112b of the cooling cycle 110, 121). ≪ / RTI >

The glycol cooler 122 may be provided with a cooler fan 122a for cooling cold water recovered from the cold water tank 131 and a circulation pump 122b for circulating cold water.

The energy-saving, low-noise, four-seater water-cooled cooling system having the inverter compressor according to an embodiment of the present invention includes a cold water coil 121, a main cold water supply pipe 123, a cold water water pipe 124, The first and second condenser return pipes 133 and 133 and the cold water return pipe 135 and the outside air temperature sensor 132 are connected to the first cold water supply pipe 125, the second cold water supply pipe 126, the cold water tank 131, the first condenser return pipe 132, (142) and a cold water temperature sensor (143).

The cold water coil 121 is provided in the housing Hs and is disposed immediately after the evaporators 111d and 112d in the cooling cycle so that the current room temperature Trp is set to the set room temperature Trs 25 ° C), and the present outdoor temperature Top is equal to or lower than the second set outdoor temperature Tos2 (for example, 15 ° C to 20 ° C), and the cold water temperature supplied from the glycol cooler 122 is lower than the second set cold water temperature (Tws2) or less, the cold water is directly supplied from the glycol cooler 122 through the main cold water supply pipe 123, and is heat-exchanged with the indoor room air of the room R to be cooled by the operation of the blowing fan Fn And generates cold air.

The main cool water supply pipe 123 is connected to the glycol cooler 122 and the other end is connected to the cold water coil 121 to supply cold water of the glycol cooler 122 to the cold water coil 121 to be.

One end of the cold water outlet pipe 124 is connected to the cold water coil 121 and the other end is connected to the second cold water supply pipe 126 while intersecting the second cold water supply pipe 126 at an intersection M1, (? T lowered) heat-exchanged from the outdoor air (121) to the first and second water-cooled condensers (111b, 112b).

The main valve Vm is provided in the main cold water supply pipe 123 and supplies cold water supplied from the glycol cooler 122 to the first heat exchange cycle 111 To the second water-cooled condenser 112b of the second heat exchange cycle 112 or to supply the cold water to the cold water coil 121. The first water-cooled condenser 111b and the second water-

The main valve Vm may be formed of a three-way valve, for example.

One end of the first cold water supply pipe 125 is connected to the main valve Vm and the other end of the first cold water supply pipe 125 is connected to the first water-cooled condenser 111b. The cold water supplied from the glycol cooler 122 is supplied to the main valve Vm To the first water-cooled condenser 111b or to the first water-cooled condenser 111b through the heat-exchanged cold water exiting from the cold water outlet pipe 124. The first water-

One end of the second cold water supply pipe 126 is connected to the main valve Vm and the other end of the second water supply pipe 126 is connected to the second water cooled condenser 112a and 112b and supplies the cold water supplied from the glycol cooler 122 to the second water-cooled condenser 112b by the intermittent flow of the main valve Vm or the heat exchange Cooled condenser 112b to the second water-cooled condenser 112b.

That is, the second cold water supply pipe 126 is installed so as to intersect with the cold water outlet pipe 124 at the intersection M1.

The first and second cold water supply pipes 125 and 126 supply the cold water supplied from the glycol cooler 122 to the first and second water cooled condensers 111b and 112b to condense the refrigerant gas in the first and second water cooled condensers 111b and 112b To the pipe.

The cold water tank 131 is configured to collect heat-exchanged cold water flowing out from the first and second water-cooled condensers 111b and 112b.

Since the cooling system according to an embodiment of the present invention is of a closed type, there may be a shortage of cold water when evaporated, and the cold water tank 131 detects a shortage of cold water, And a level sensor 131a provided in the cold water tank 131 for sensing the level of the cold water and outputting the detected level to the control unit 140. [

The control unit 140 receives the level signal from the level sensor 131a and compares the current level value of the received level signal with the previously stored reference level value. If the received current level value is smaller than the reference level value, And outputs an alarm signal to the alarm device (not shown).

The alarm device outputs a buzzer sound when the alarm signal is received from the control section.

The first condenser water return pipe 132 is connected to the first water cooled condenser 111b and the other side is connected to the cold water tank 131. The first water cooled condenser 111b is connected to the first water cooled condenser 111b, (The cold water in the state where the temperature is raised) to the cold water tank 131.

The second condenser water return pipe 133 is connected to the second water cooled condenser 112b and the other end is connected to the cold water tank 131. The cold water discharged from the first water cooled condenser 111b Is the cold water in the raised state) to the cold water tank 131.

The cold water return pipe 135 is connected to the cold water tank 131 and the glycol cooler 122 to guide the water recovered to the cold water tank 131 to the glycol cooler 122.

The glycol cooler 122 is installed in the main cool water supply pipe 122 between the main valve Vm and the glycol cooler 122 so that the cold water supplied from the glycol cooler 122 flows into the main cold water supply pipe 122, A first solenoid valve V1 for interrupting the supply of cold water to the condenser 111b and 112b and a second solenoid valve V1 installed in the cold water return pipe 135 for interrupting the circulation of cold water from the cold water tank 131 to the glycol cooler 122 And a second solenoid valve V2 may be further included.

The room temperature sensor 141 is installed at one side of the housing Hs or in the room R to be cooled.

The outdoor temperature sensor 142 is installed outdoors to measure the outdoor temperature and output the measured outdoor temperature to the controller 140.

The cold water temperature sensor 143 is provided in the glycol cooler 122 to sense the temperature of the cold water supplied from the glycol cooler 122 and output the sensed temperature to the controller 140.

The control unit 140 controls the opening and closing of the main valve Vm based on the temperature signal received from the indoor temperature sensor 141, the outdoor temperature sensor 142 and the cold water temperature sensor 143, And outputs an inverter control signal to the inverter (150).

The first cold water supply pipe 125 and the cold water water pipe 124 are merged at the first branch point N1 and the first condenser water pipe 132 and the second condenser water pipe 133 are connected at the second branch point N2 At this time, each of the branch points N1 and N2 may be composed of a T connection port.

The intersection M1 may be a cross-shaped connection.

The cold water supplied to the water-cooled condensers 111b and 112b and the cold water supplied to the cold water coils 121 in the glycol cooler 122 are the same. However, the cold water supplied to the water-cooled condensers 111b and 112b functions as " The cold water supplied to the cold water coil 121 serves only as a heat exchange medium, and the cold water supplied from the glycol cooler 122 has a different role depending on the use (or the object to be supplied).

In addition, the energy-saving low-noise, four-seater water-cooled cooling system having the inverter compressor according to an embodiment of the present invention may further include a temperature setting unit 145 and a display unit 146.

The temperature setting unit 145 is a user interface provided with an input button for setting the room temperature. The display unit 146 displays various information including the current outside temperature, the current room temperature, and the current cooling water temperature to the user .

The control unit 140 receives the current room temperature Trp from the room temperature sensor 141 and controls the temperature of the outside air temperature sensor 141. In the present embodiment, And receives the temperature of the cold water supplied from the cold water temperature sensor 143 to the main cold water supply pipe 122. If the received current room temperature Trp is lower than the set indoor temperature Trs (For example, 22 to 26 ° C), the received current outside temperature (Top) is equal to or higher than the third set outside temperature Tos3 (for example, 15 to 20 ° C) The control unit 140 determines that cooling of the cold water coil is difficult because the temperature of the outside air is high and the temperature of the cold water is high so that the first and second heat exchange cycles 111 and 2 To drive both heat exchange cycles And outputs an inverter control signal for driving both the first compressor 111a and the second compressor 112a so that the cold water supplied from the glycol cooler 122 flows through the main cold water supply pipe 123, Off control signal to the main valve Vm so as to be supplied only to the first and second water-cooled condensers 111b and 112b through the first and second cold water supply pipes 125 and 126 without being supplied to the coil 121 Forced air conditioning mode in summer].

At this time, the inverter 150 outputs a compressor drive control signal, which is a pulse width modulation signal proportional to the indoor temperature value, to the first and second compressors 111a and 112a according to the received inverter control signal, 111a, and 112a.

The main valve Vm receives the first opening and closing control signal from the controller 140. The main valve Vm does not allow the cold water supplied from the glycol cooler 122 to flow into the cold water coil 121, The main cold water supply pipe 123 is closed and the first and second cold water supply pipes 125 and 126 are opened so as to flow only to the first and second cold water supply pipes 125 and 126.

The control unit 140 receives the current room temperature Trp from the room temperature sensor 141 and controls the temperature of the outside air temperature sensor 141. In the present embodiment, And receives the temperature of the cold water supplied from the cold water temperature sensor 143 to the main cold water supply pipe 122. If the received current room temperature Trp is lower than the set indoor temperature Trs (For example, 22 to 26 ° C), and the received current outside temperature (Top) is equal to or lower than the first set outside temperature Tos1 (for example, 5 to 7 ° C) The main coolant is supplied from the glycol cooler 122 to the cold water coil 121 through the main cold water supply pipe 123 and then supplied to the main valve Vm through the second cold water supply pipe 123, And outputs an opening / closing control signal [natural air conditioning mode of winter season] .

At this time, in order to stop the driving of the compressors 111a and 112a, an inverter control signal is output to the inverter, and the inverter 150 stops driving the first and second compressors 111a and 112a in accordance with the received inverter control signal And outputs a compressor drive control signal for controlling the compressor.

The control unit 140 receives the current room temperature Trp from the room temperature sensor 141 and controls the temperature of the outside air temperature sensor 141. In the present embodiment, And receives the temperature of the cold water supplied from the cold water temperature sensor 143 to the main cold water supply pipe 122. If the received current room temperature Trp is lower than the set indoor temperature Trs (For example, 22 to 26 DEG C) and the received current outside temperature Top is equal to or higher than the first set outside temperature Tos1 (e.g., 5 to 7 DEG C) and the second set outside temperature Tos2 (5 to 7) to (12 to 15) ° C in the above example), and the received current cold water temperature Twp is lower than the first set cold water temperature Tws1 When the temperature is within the cold water temperature Tws2 [e.g., 12 占 폚] (3 to 12 占 폚 in the above example), the glycol cooler 122 And the second opening / closing control signal is outputted to the main valve Vm so that the cold water supplied is supplied to the cold water coil 121 through the main cold water supply pipe 123. Since the temperature of the outside air is low but the cold water temperature is not cooled, The first compressor 111a or the second compressor 112a is operated to determine whether the cooling operation is difficult or not so as to perform the heat exchange cycle in either the first heat exchange cycle 111 or the second heat exchange cycle, ) To the inverter 150 (hybrid air-conditioning mode of the heaters).

The inverter 150 outputs a compressor driving control signal, which is a pulse width modulation signal proportional to a room temperature value, to either one of the first and second compressors 111a and 112a according to the received inverter control signal, (111a, 112a) is driven.

At this time, the inverter 150 outputs a drive stop control signal for stopping the drive in order to stop the drive of the non-operation compressor, which is not the compressor of the heat exchange cycle to be operated.

The main valve Vm receiving the second open / close control signal from the controller 140 prevents the cold water supplied from the glycol cooler 122 from flowing to the first and second cold water supply pipes 125 and 126, The main cold water supply pipe 123 is opened so that only the main cold water supply pipe 123 flows.

The operation of the energy-saving low-noise, four-seater water-cooled cooling system having the inverter compressor according to one embodiment of the present invention will be described.

First, the cooling mode (forced air conditioning mode) of the summer season will be described with reference to Fig.

The control unit 140 receives the current room temperature Trp from the room temperature sensor 141 and receives the current outside temperature Top from the outside air temperature sensor 142. The control unit 140 receives the current outside temperature temperature Top from the cold water temperature sensor 143, ), And when the received current room temperature Trp is equal to or higher than the set room temperature Trs (e.g., 22 to 26 ° C) and the received current outside temperature Top is the third set outside temperature (For example, 15 to 20 ° C) and the received current cold water temperature Twp is larger than the second predetermined cold water temperature Tws2 (for example, 12 ° C), the temperature of the outside air is high and the cold water temperature is high, It is determined that the cooling of the coil is difficult, and an inverter control signal for driving both the first compressor 111a and the second compressor 112a is output.

The inverter 150 outputs a compressor driving control signal, which is a pulse width modulation signal proportional to a room temperature value, to the first and second compressors 111a and 112a in accordance with the received inverter control signal. The first and second compressors 111a and 112a And 112a are driven, so that the first and second heat exchange cycles 111 and 112 are all operated.

The controller 140 controls the operation of the glycol cooler 122 such that the cold water supplied from the glycol cooler 122 is not supplied to the cold water coil 121 through the main cold water supply pipe 123 but only through the first and second cold water supply pipes 125, 2 control signal to the main valve Vm so as to be supplied only to the water-cooled condensers 111b and 112b.

The main valve Vm that receives the first opening and closing control signal from the control unit 140 can not allow the cold water supplied from the glycol cooler 122 to flow into the cold water coil 121 but only to the first and second cold water supply pipes 125 and 126 The main cold water supply pipe 123 is closed and the first and second cold water supply pipes 125 and 126 are opened.

Half of the cold water supplied from the glycol cooler 122 flows through the main cool water supply pipe 123, the main valve Vm, the first cold water supply pipe 125, the first water-cooled condenser 111b, (132) - > the first branch point (N1) - > the cold water tank (131)

The other half of the cold water supplied from the glycol cooler 122 is supplied to the main cool water supply pipe 123, the main valve Vm, the second cold water supply pipe 126, the second water-cooled condenser 112b, (133) -> first branch point (N1) -> cold water tank (131).

At this time, the cold water is used only for cooling the first and second water-cooled condensers 111b and 112b.

Exchanged cold water collected in the cold water tank 131 is returned to the glycol cooler 122 via the cold water return pipe 135. [

Next, the cooling mode (natural air conditioning mode) of the winter season will be described based on Fig. This "forced air conditioning mode" is an air conditioning mode in which cooling is performed only by cold water without the cooling cycle.

The control unit 140 receives the current room temperature Trp from the room temperature sensor 141 and receives the current outside temperature Top from the outside air temperature sensor 142. The control unit 140 receives the current outside temperature temperature Top from the cold water temperature sensor 143, And if the received present room temperature Trp is equal to or higher than the set room temperature Trs (for example, 22 to 26 ° C) and the received current outside temperature Top is the first set outside temperature When the received cold water temperature Twp is equal to or lower than the first preset cold water temperature TwS1 (e.g., 5 to 7 DEG C) and the received current cold water temperature Twp is equal to or lower than the first predetermined cold water temperature Tws1 (e.g., 3 DEG C), the cold water supplied from the glycol cooler 122 Off control signal to the main valve Vm so as to be supplied only to the cold water coil 121 through the main cold water supply pipe 123 and to stop the drive of the compressors 111a and 112a, 150).

The main valve Vm receiving the second open / close control signal from the controller 140 controls the flow of cold water supplied from the glycol cooler 122 to the cold water coil 121 without flowing into the first and second cold water supply pipes 125 and 126, The main cold water supply pipe 123 is opened.

The cold water supplied from the glycol cooler 122 is supplied to the cold water coil 121 through the main cold water supply pipe 123 in accordance with the opening and closing operation of the main valve Vm and the cold water coil 121 is hot Exchanges heat with air to generate cold air and supplies it to the room.

The cold water whose temperature has been lowered by the heat exchange in the cold water coil 121 is discharged to the cold water outlet pipe 124.

The cold water outflowed from the cold water outlet pipe 124 is divided at the intersection M1 and half of the cold water discharged from the cold water outlet pipe 123 flows through the cold water outlet pipe 123, the first branch point N1, the first cold water supply pipe 125, Enters the cold water tank 131 via the first water-cooled condenser 111b, the first condenser return pipe 132, and the second branch point N2.

The remaining half of the cold water out of the cold water outflow pipe 124 flows through the cold water outflow pipe 123 to the intersection M1 to the second cold water supply pipe 126 to the second water cooled condenser 112b Enters the cold water tank 131 via the condenser return pipe 133 and the second branch point N2.

The cold water in this case is not used for cooling the first and second water-cooled condensers 111b and 112b but is introduced into the cold water tank 131 via the first and second water-cooled condensers 111b and 112b. It is possible to confirm the total amount of the circulating cold water, so that it is possible to confirm whether or not the replenishing of the cold water is necessary.

Exchanged cold water collected in the cold water tank 131 is returned to the glycol cooler 122 via the cold water return pipe 135. [

The inverter 150 outputs a compressor drive control signal for stopping the driving of the first and second compressors 111a and 112a according to the received inverter control signal, and the operation of the cooling cycle is ended.

Finally, the cooling operation (hybrid air conditioning mode) of the spring and autumn seasons (light season) will be described with reference to Fig. The "hybrid air conditioning mode" is basically a cooling by cold water, but in the case where the temperature of the cold water rises, any one of two cooling cycles (in this embodiment, the first heat exchanging cycle is taken as an example) And is an air conditioning mode in which cooling is assisted by cooling cycle operation.

The control unit 140 receives the current room temperature Trp from the room temperature sensor 141 and receives the current outside temperature Top from the outside air temperature sensor 142. The control unit 140 receives the current outside temperature temperature Top from the cold water temperature sensor 143, And if the received present room temperature Trp is equal to or higher than the set room temperature Trs (for example, 22 to 26 ° C) and the received current outside temperature Top is the first set outside temperature (5 to 7) to (12 to 15) ° C in the above example) between the first set ambient temperature Tos1 (for example, 5 to 7 ° C) and the second set ambient temperature Tos2 (for example, 12 to 15 ° C) When the present cold water temperature Twp is the temperature between the first set cold water temperature Tws1 (for example 3 deg. C) and the second set cold water temperature Tos2 (for example 12 deg. C) Off control signal to the main valve (Vm) so that the cold water supplied from the glycol cooler (122) is supplied to the cold water coil (121) through the main cold water supply pipe (123) And outputs the drive control signal to drive a first compressor (111a) to the inverter (150).

That is, it is determined that the cooling of the outdoor unit is difficult but that the cold water temperature is not cooled, so that the cold water coil alone is not enough to heat the air, so that only the first heat exchange cycle 111 is operated in the two cooling cycles.

The inverter 150 outputs a compressor driving control signal, which is a pulse width modulation signal proportional to a room temperature value, to either one of the first and second compressors 111a and 112a in accordance with the received inverter control signal, 111a, and 112a are driven.

At this time, the inverter 150 outputs a drive stop control signal for stopping the drive in order to stop the drive of the non-operation compressor, which is not the compressor of the heat exchange cycle to be operated.

The main valve Vm receiving the second open / close control signal from the controller 140 prevents the cold water supplied from the glycol cooler 122 from flowing to the first and second cold water supply pipes 125 and 126, The main cold water supply pipe 123 is opened.

The cold water supplied from the glycol cooler 122 is supplied to the cold water coil 121 through the main cold water supply pipe 123 in accordance with the opening and closing operation of the main valve Vm and the cold water coil 121 is hot Exchanges heat with air to generate cold air and supplies it to the room.

The cold water whose temperature has been lowered by the heat exchange in the cold water coil 121 is discharged to the cold water outlet pipe 124.

The cold water outflowed from the cold water outlet pipe 124 is divided at the intersection M1 and half of the cold water discharged from the cold water outlet pipe 124 flows through the cold water outlet pipe 123, the first branch point N1, the first cold water supply pipe 125, Enters the cold water tank 131 via the first water-cooled condenser 111b, the first condenser return pipe 132, and the second branch point N2.

In the first water-cooled condenser 111b, the cold water exchanges heat with the refrigerant, thereby lowering the temperature of the cold water.

The remaining half of the cold water out of the cold water outflow pipe 124 flows through the cold water outflow pipe 123 to the intersection M1 to the second cold water supply pipe 126 to the second water cooled condenser 112b Enters the cold water tank 131 via the condenser return pipe 133 and the second branch point N2.

The cold water in this case is used for cooling in the case of the first water-cooled condenser 111b and not used for cooling in the case of the second water-cooled condenser 112b, and the first and second water-cooled condensers 111b and 112b, And the total amount of the circulating cold water can be confirmed.

Exchanged cold water collected in the cold water tank 131 is returned to the glycol cooler 122 via the cold water return pipe 135. [

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or scope of the invention as defined in the appended claims. It is self-evident to those who have.

Therefore, the above-described embodiments are to be considered as illustrative rather than restrictive, and the present invention is not limited to the above description, but may be modified within the scope of the appended claims and equivalents thereof.

110: cooling cycle 111: first heat exchange cycle
111a: first compressor 111b: first water-cooled condenser
111c: first expansion valve 111d: first evaporator
112: second heat exchange cycle 112a: second compressor
112b: second water-cooled condenser 112c: second expansion valve
112d: second evaporator Ai: indoor air inlet
Ao: Cold air outlet R: Indoor
Fn: Ventilation fan Hs: Housing
121: cold water coil 122: glycol cooler
122a: Cooler fan 122b: Circulation pump
123: main cold water supply pipe 124: cold water outlet pipe
Vm: main valve 125: first cold water supply pipe
126: second cold water supply pipe
M1: the intersection of the second cold water supply pipe and the cold water outlet pipe
131: cold water tank 131a: level sensor
132: First condenser return pipe 133: Second condenser return pipe
135: cold water return pipe V1: first solenoid valve
V2: second solenoid valve 140:
141: indoor temperature sensor 142: outdoor temperature sensor
143: cold water temperature sensor N1: first branch point
N2: second branch point 145: temperature setting unit
146:

Claims (4)

A cooling cycle 110 including the compressors 111a and 112a, the water-cooled condensers 111b and 112b, the expansion valves 111c and 112c and the evaporators 111d and 112d and the indoor air inlet Ai A blowing fan Fn for forcibly discharging the cold air generated by the evaporators 111d and 112d to the room R to be cooled through the cold air discharge opening Ao after the forced introduction through the water cooling condensers 111b and 112b, And a glycol cooler 122 for supplying cold water to the water-cooled condensers 111b and 112b,
An indoor temperature sensor 141 for measuring the indoor temperature,
A controller 140 for generating an inverter control signal proportional to the received room temperature value and outputting the generated inverter control signal to the inverter 150 when the room temperature received from the room temperature sensor 141 is equal to or higher than a predetermined first room temperature,
The control unit 140 calculates the operation voltage and the operation frequency (Hz) of the compressors 111a and 112a based on the inverter control signal input from the control unit 140 and outputs a compressor drive control signal based on the calculated operation voltage and the operation frequency And an inverter (150) for outputting the signals to the compressors (111a, 112a)
The compressors 111a and 112a are driven in response to a compressor drive control signal output from the inverter 150,
The cooling cycle (110)
A first water-cooled condenser 111b for condensing the refrigerant gas, which has passed through the first compressor 111a and is compressed at a high temperature and a high pressure, into a refrigerant liquid; A first expansion valve 111c for expanding the refrigerant condensed in the first water-cooled condenser 111b, a first evaporator 111b for generating a cool air by heat exchange with the indoor air, A first heat exchange cycle (111)
A second water-cooled condenser 112b for condensing the refrigerant gas, which has passed through the second compressor 112a and is compressed at a high temperature and a high pressure, into a refrigerant liquid; A second expansion valve 112c for expanding the refrigerant condensed in the second water-cooled condenser 112b, and a second evaporator 112b for generating a cool air by exchanging heat with the indoor air through the refrigerant liquid passing through the second expansion valve 112c And a second heat exchange cycle 112,
The glycol cooler 122 supplies cold water to the cold water coil 121 in addition to the water-cooled condensers 111b and 112b in the cooling cycle 110,
When the present room temperature Trp is equal to or higher than the set room temperature Trs and the current outside temperature Top is equal to or lower than the second set outside temperature Tos2 and the cold water temperature supplied from the glycol cooler 122 is lower than the second setting A cold water coil 121 that receives cold water directly from the glycol cooler 122 and generates heat by exchanging heat with indoor air of high temperature of the room R to be cooled, when the temperature is equal to or lower than the cold water temperature Tws2,
A main cold water supply pipe 123 connected to the glycol cooler 122 at one end and connected to the cold water coil 121 to supply cold water of the glycol cooler 122 to the cold water coil 121,
One end of the cold water coil 121 is connected to the cold water coil 121 and the other end is connected to the second cold water supply pipe 126 while intersecting the second cold water supply pipe 126 at the intersection M1, A cold water outlet pipe 124 for guiding the cold water to the first and second water-cooled condensers 111b and 112b,
The cold water supplied from the glycol cooler 122 is supplied to the first water-cooled condenser 111b and the second water-cooled condenser 112b or is supplied to the cold water coil 121 A main valve Vm for interrupting the main valve Vm,
One of which is connected to the main valve Vm and the other of which is connected to the first water-cooled condenser 111b to supply cold water supplied from the glycol cooler 122 to the first water- A first cold water supply pipe 125 for supplying the heat-exchanged cold water supplied to the condenser 111b or the cold water outlet pipe 124 to the first water-cooled condenser 111b,
One end of which is connected to the main valve Vm and the other end of which is connected to the second water-cooled condenser 112b so as to cross each other at an intersection M1 of the cold water outlet pipe 124. The cold water supplied from the glycol cooler 122 Cooled condenser 112b by supplying the heat-exchanged cold water discharged from the cold water outlet pipe 124 to the second water-cooled condenser 112b by the intermittent flow of the main valve Vm, A cold water supply pipe 126,
A cold water tank 131 for collecting heat-exchanged cold water of the first and second water-cooled condensers 111b and 112b,
A level sensor 131a provided in the cold water tank 131 for sensing the level of the cold water and outputting the detected level to the control unit 140,
And one end of which is connected to the cold water tank 131 and one end of which is connected to the cold water tank 131 and the cold water exchanged with the refrigerant gas in the first water- A first condenser return pipe 132,
And a second water-cooled condenser 112b is connected to the other end of the second water-cooled condenser 112b. The other end of the second water-cooled condenser 111b is connected to the cold water tank 131, A condenser return pipe 133,
A cold water return pipe 135 connected to the cold water tank 131 and the glycol cooler 122 to guide the water recovered into the cold water tank 131 to the glycol cooler 122,
An outdoor temperature sensor 142 installed outside the outdoor unit for measuring outdoor temperature and outputting the outdoor temperature to the control unit 140,
And a cold water temperature sensor 143 provided in the glycol cooler 122 for sensing the temperature of the cold water supplied from the glycol cooler 122 and outputting the detected temperature to the controller 140,
The first cold water supply pipe 125 and the cold water water pipe 124 are combined at a first branch point N1 and the first condenser water pipe 132 and the second condenser water pipe 133 are connected to the second branch point N2 ),
The control unit 140 receives the level signal from the level sensor 131a and compares the current level of the received level signal with the previously stored reference level value. If the received current level value is smaller than the reference level value An alarm signal is outputted to the alarm device,
The control unit 140 controls the opening and closing of the main valve Vm based on the temperature signal received from the indoor temperature sensor 141, the outdoor temperature sensor 142 and the cold water temperature sensor 143, And outputs an inverter control signal to the inverter 150,
The control unit 140 receives the current room temperature Trp from the room temperature sensor 141 and receives the current outside temperature Top from the outside air temperature sensor 142. The control unit 140 receives the current outside temperature from the cold water temperature sensor 143, Receives the temperature of the cold water supplied to the supply pipe 122,
The control unit 140 determines that the received current room temperature Trp is equal to or higher than the set room temperature Trs and the received current outside temperature Top is equal to or greater than the third set outside temperature Tos3, The controller 140 controls the first compressor 111a and the second compressor 111b to operate both the first heat exchange cycle 111 and the second heat exchange cycle when the second set cold water temperature Twp is greater than the second set cold water temperature Tws2. The cold water supplied from the glycol cooler 122 is not supplied to the cold water coil 121 through the main cold water supply pipe 123 and only the cold water supplied from the glycol cooler 122 is supplied to the cold water coil 121. [ Off control signal to the main valve Vm so as to be supplied only to the first and second water-cooled condensers 111b and 112b through the first and second cold water supply pipes 125 and 126. The inverter 150 converts the received first opening / In accordance with the control signal, a pulse width modulated signal proportional to the room temperature value And outputs the compressor drive control signal to the first and second compressors 111a and 112a,
The control unit 140 determines that the received current room temperature Trp is equal to or higher than the set room temperature Trs and the received current outside temperature Top is equal to or lower than the first set outside temperature Tos1, (Twp) is equal to or lower than the first set cold water temperature Tws1, the cold water supplied from the glycol cooler 122 is supplied to the main valve Vm through the main cold water supply pipe 123 only to the cold water coil 121 And outputs an inverter control signal to the inverter 150 in order to stop the driving of the first and second compressors 111a and 112a. The inverter 150 outputs the second open / close control signal to the inverter control signal Accordingly, it outputs a compressor drive control signal for stopping the driving of the first and second compressors 111a and 112a,
The controller 140 determines that the received current room temperature Trp is equal to or higher than the set room temperature Trs and the received current outside temperature Top is equal to the first set outside temperature Tos1 and the second set outside temperature Tos2 ) And the received current cold water temperature Twp is the temperature between the first set cold water temperature Tws1 and the second set cold water temperature Tws2,
A second open / close control signal is outputted to the main valve Vm so that the cold water supplied from the glycol cooler 122 is supplied to the cold water coil 121 through the main cold water supply pipe 123,
In order to operate the heat exchange cycle of either the first heat exchange cycle (111) or the second heat exchange cycle, it is determined that the cold water temperature is low and the cold water temperature is not cooled, And outputs an inverter control signal to the inverter (150) so as to drive either the first compressor (111a) or the second compressor (112a)
The inverter 150 outputs a compressor driving control signal, which is a pulse width modulation signal proportional to a room temperature value, to either one of the first and second compressors 111a and 112a according to the received inverter control signal, 111a, and 112a are driven,
The main valve Vm that receives the first opening and closing control signal from the controller 140 can not allow the cold water supplied from the glycol cooler 122 to flow into the cold water coil 121 but only through the first and second cold water supply pipes 125 and 126 The main cold water supply pipe 123 is closed and the first and second cold water supply pipes 125 and 126 are opened,
The main valve Vm receiving the second open / close control signal from the controller 140 prevents the cold water supplied from the glycol cooler 122 from flowing into the first and second cold water supply pipes 125 and 126, And the main cold water supply pipe (123) is opened so that only the refrigerant flows through the main cold water supply pipe (123).
The method according to claim 1,
The inverter 150 stores the low-pressure stop pressure set value and the high-pressure stop pressure set value in advance,
When the pressure of the compressors 111a and 112a is received and the pressures of the compressors 111a and 112a are equal to or lower than the low pressure stop pressure set value or the high pressure stop pressure set value, the driving of the compressors 111a and 112a is stopped And the inverter control unit outputs the drive control signal to the inverter compressor. The energy-saving low-noise, four-seater water-cooled cooling system includes the inverter compressor.
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