KR100786257B1 - A air conditioner having two condenser - Google Patents

Abstract

An air-conditioner having two condensers is provided to improve durability of the air-conditioner by activating one condenser or two condensers based on variation of compressor load obtained from compressors with increasing cooling efficiency of the system and circulation of refrigerant. An air-conditioner having two condensers has a first compressor(120a) and a second compressor(120b) which compress refrigerant discharged from an evaporator(110) through an evaporator discharge pipe(114) with a first suction pipe(122a) and a second suction pipe(122b); a first condenser(130a) which condenses refrigerant discharged from both compressors through discharge pipes(124a, 124b) with a condenser inlet pipe(132a); a second condenser(130b) which condenses refrigerant discharged from a condenser outlet pipe(134a) by introducing refrigerant to the second condenser with a condenser inlet pipe(132b) when both compressors are turned on; a pipe(160) which carries refrigerants discharged from the condenser outlet pipe to an evaporator(110) through an expansion valve(140) directly when only one compressor is turned on; a four-way switching member(150) which switches direction of refrigerant flow based on the operation of compressors by having pipe connections to the condenser outlet pipe at the first condenser, the condenser inlet pipe at the second condenser, and the pipe; an additional pipe(170) which carries refrigerant discharged from a condenser outlet pipe(134b) located at the second condenser to the pipe.

Description

Air conditioner having two condenser

1 is a flow chart of a refrigerant when both compressors are turned on in an air conditioner according to the related art.

FIG. 2 is a flow chart of a refrigerant when only one of two compressors is turned on in an air conditioner according to the related art.

3 is a flow chart of a refrigerant when both compressors are turned on in an air conditioner having two condensers according to an exemplary embodiment of the present invention.

FIG. 4 is a flow chart of a refrigerant when only the first compressor of two compressors is turned on in an air conditioner having two condensers according to an embodiment of the present invention.

FIG. 5 is a flow chart of a refrigerant when only a second compressor of two compressors is turned on in an air conditioner having two condensers according to an embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

110: evaporator 112: evaporator inlet pipe

114: evaporator discharge pipe 120a, 120b: the first and second compressors

122a, 122b: 1st, 2nd compressor inlet pipe 124a, 124b: 1st, 2nd compressor discharge pipe

130a: first condenser 132a: condenser inlet pipe

134a: first condenser discharge pipe 130b: second condenser

132b: second condenser inlet pipe 134b: second condenser inlet pipe

140: expansion valve 150: four-way switching member

160: transfer pipe 170: sub-feed pipe

172: solenoid valve

The present invention relates to an air conditioner having two compressors, and more particularly to a change in the compression capacity by providing two condensers to selectively operate the condenser in response to a change in the compression capacity according to the operation of the two compressors. Accordingly, the present invention relates to an air conditioner having two condensers, in which the cooling efficiency is increased not only by increasing the volume of the condenser and maintaining the flat pressure, but also by the recovery of the refrigerant discharged from the compressor, thereby increasing the durability of the compressor.

In general, an air conditioner is an outdoor heat exchanger (hereinafter referred to as a 'condenser') in which a motor is driven to liquefy refrigerant by high pressure, and moves the refrigerant condensed at this high pressure into a tube having a small diameter. Since the refrigerant is evaporated and evaporated instantaneously in the 'evaporator', the temperature is lowered to generate cold air, and cooling is performed by discharging the generated cold air into the room.

In addition, the refrigerant vaporized while absorbing heat from the evaporator is liquefied by moving from the compressor to the condenser, releasing heat to the outside to continuously cool through the above process.

1 is a flow chart of a refrigerant when both compressors are turned on in an air conditioner according to the prior art, and FIG. 2 is a view showing that only one compressor of two compressors is turned on in an air conditioner according to the prior art. In the case of the refrigerant flow chart.

As shown in FIG. 1, a configuration of an air conditioner according to the related art includes first and second compressors 20a and 20b for compressing a refrigerant at high temperature and high pressure, and the first and second compressors 20a and 20b. The condenser 30 for condensing the refrigerant compressed by the low pressure and high pressure state, the swelling valve 40 to rapidly expand the refrigerant conveyed through the condenser 30 to a low temperature low pressure state, and the expansion valve ( It is largely composed of an evaporator 10 for absorbing the heat of the room by the expansion refrigerant transferred in 40 to discharge the cold air.

Looking at the state of use of the air conditioner according to the prior art, the refrigerant compressed in the high temperature and high pressure state in the first, second compressor (20a, 20b) is introduced into the condenser 30, the low temperature and high pressure by the condenser 30 Condensation in the state.

In addition, the refrigerant condensed in the condenser 30 is transferred to the expansion valve 40 to be converted into a refrigerant having a low temperature and low pressure, and the refrigerant expanded by the expansion valve 40 flows into the evaporator 10 to heat the room. Absorption releases cold air, lowering the temperature in the room.

In addition, the refrigerant evaporated while absorbing heat from the evaporator is moved again from the compressor to the condenser to condense and liquefy to release heat to the outside.

As described above, the air conditioner having two compressors according to the related art performs cooling while the above process is continuously repeated.

Meanwhile, as shown in FIG. 2, when the air conditioner according to the prior art operates a power saving mode for power saving, only one of the first and second compressors 20a and 20b is selectively operated to supply cold air. Done.

However, when the air conditioner according to the prior art only one of the two compressors (ON) in the power saving mode (ON), the condenser capacity is enlarged compared to the compressor capacity, the pressure is not maintained because the refrigerant flow is not smooth, cooling efficiency is reduced There is a problem that the durability of the parts is lowered because the recovery of the refrigerant is not made smoothly.

An air conditioner having two condensers according to the present invention has been devised in view of this point, and has a condenser that is selectively operated to correspond to a change in compression capacity according to the operation of two compressors. The purpose of the present invention is to provide an air conditioner having two condensers that smoothly, thereby increasing the cooling efficiency and smoothing the recovery of the refrigerant to improve durability.

In order to achieve the above object, an air conditioner having two condensers according to the present invention includes first and second compressors for compressing the refrigerant discharged from the evaporator to the evaporator discharge pipe through the first and second compressor inlet pipes. A first condenser for injecting and condensing the refrigerant discharged into the first and second compressor discharge pipes of the first and second compressors through the condenser inlet pipe, and the first and second compressors are both turned on. A second condenser for introducing the refrigerant discharged into the first condenser discharge pipe of the first condenser through a second condenser inlet pipe to condense the refrigerant, and the first condenser when the one of the first and second compressors is ON. A conveying tube for allowing the refrigerant discharged into the condenser discharge pipe to directly flow into the evaporator through an evaporator inlet pipe through an expansion valve, a first condenser discharge pipe of the first condenser, and a second condenser inlet pipe of the second condenser Between the transfer pipe A four-way switching member which is connected to the first and second compressors and selectively transfers the refrigerant by switching depending on whether the first and second compressors are selectively operated, and the refrigerant discharged into the second condenser discharge pipe of the second condenser to the transfer pipe. It is configured to include a sub-conduit pipe to be transported.

Preferably, the four-way switching member disconnects the first condenser discharge pipe and the transfer pipe when both the first and second compressors are turned on (ON), the first condenser discharge pipe and the second condenser inlet By connecting the pipes, the refrigerant discharged from the first condenser is introduced into the second condenser.

Preferably, the four-way switching member disconnects the connection between the first condenser discharge pipe and the second condenser inlet pipe when only one of the first and second compressors is turned on (ON), and the first condenser discharge pipe By connecting the transfer pipe with the refrigerant is discharged from the first condenser to be transferred directly to the transfer pipe without passing through the second condenser.

Preferably, the sub conveying pipe is provided with a solenoid valve for controlling the flow of the refrigerant discharged from the second condenser discharge pipe.

Hereinafter, an embodiment of an air conditioner having two condensers according to the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of a user or an operator. Therefore, the definitions of these terms should be made based on the contents throughout the specification.

First, FIG. 3 is a flow chart of a refrigerant when both compressors are turned on in an air conditioner having two condensers according to an embodiment of the present invention, and FIG. 4 is a diagram illustrating two refrigerants according to an embodiment of the present invention. Refrigerant flow chart when only the first compressor of the two compressors (ON) in the air conditioner having a condenser, Figure 5 is a flow chart of the two compressors in the air conditioner having two condensers according to an embodiment of the present invention A flowchart of the refrigerant when only the second compressor is ON.

As shown in Figure 3 to 5, when the configuration of the air conditioner having two condensers according to an embodiment of the present invention, the refrigerant discharged from the evaporator 110 to the evaporator discharge pipe 112, the first, First and second compressors 120a and 120b which flow through the second compressor inlet pipes 122a and 122b and compress the first and second compressor discharge pipes of the first and second compressors 120a and 120b. When the first condenser 130a and the first and second compressors 120a and 120b that inject and condense the refrigerant discharged to the 124a and 124b through the condenser inlet pipe 132a operate (ON), Only the second condenser 130b for introducing and condensing the refrigerant discharged into the first condenser discharge pipe 134a through the second condenser inlet pipe 132b and only one of the first and second compressors 120a and 120b. The refrigerant discharged to the first condenser discharge pipe 134a through the evaporator inlet pipe 112 passes the second condenser 130b through the expansion valve 140 at the time of operation (ON). Transfer pipe 160 to be introduced directly into the evaporator 110, the first condenser discharge pipe 134a of the first condenser and the second condenser inlet pipe 132b of the second condenser and the transfer pipe 160 A connection member installed between the four-side switching member 150 for selectively transferring the refrigerant by switching depending on whether the first and second compressors 120a and 120b are selectively operated, and the second condenser discharge pipe of the second condenser. It is largely composed of a sub-feed pipe 170 for transferring the refrigerant discharged to the (134b) to the transfer pipe (160).

Here, the four-way switching member 150 preferably uses a four-way valve to selectively transport the refrigerant depending on whether the first and second compressors 120a and 120b are operated.

At this time, the four-way switching member 150 disconnects the connection between the first condenser discharge pipe 134a and the transfer pipe 160 when both the first and second compressors 120a and 120b are turned on. The refrigerant discharged from the first condenser 130a is introduced into the second condenser 130b by connecting the first condenser discharge pipe 134a and the second condenser inlet pipe 132b.

On the other hand, the four-way switching member 150 is the first condenser discharge pipe 134a and the second condenser inlet pipe 132b when only one of the first and second compressors 120a and 120b is activated (ON). The connection of the first condenser discharge pipe (134a) and the transfer pipe (160) by disconnecting the refrigerant discharged from the first condenser (130a) without passing through the second condenser (130b) Direct transfer to (160).

In addition, the secondary conveying pipe 170 is provided with a solenoid valve 172 to control the flow of the refrigerant discharged from the second condenser discharge pipe (134b).

Here, the solenoid valve 172 is opened (ON) when the first and second compressors (120a, 120b) are both operated (ON), the refrigerant discharged from the second condenser discharge pipe (134b) is the secondary feed pipe (170) It is formed to be transferred to the transfer pipe 160 through.

In addition, the solenoid valve 172 is closed (OFF) when any one of the first, second compressor (120a, 120b) is turned on (OFF) is discharged from the first condenser discharge pipe (134a) to the transfer pipe 160 The refrigerant to be conveyed is formed to prevent backflow to the second condenser 130b.

Hereinafter, the operation of an air conditioner having two condensers according to an embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 3, the flow of the refrigerant when the first and second compressors 120a and 120b are both turned on will be described.

First, the first and second compressors 120a and 120b introduce the refrigerant discharged from the evaporator 110 through the evaporator discharge pipe 114 through the second and second compressor inlet pipes 122a and 122b, respectively. .

The first and second compressors 120a and 120b compress the introduced refrigerant into a high temperature and high pressure state and discharge the refrigerant into the first and second compressor discharge pipes 124a and 124b, respectively.

In addition, the condenser inlet pipe 132a allows the refrigerant discharged to the first and second compressor discharge pipes 124a and 124b to flow into the first condenser 130a.

The first condenser 130a condenses the refrigerant introduced through the condenser inlet pipe 132a in a state of low temperature and high pressure and discharges the refrigerant to the first condenser discharge pipe 134a.

At this time, the four-way switching member 150 disconnects the connection between the first condenser discharge pipe 134a and the transfer pipe 160 and connects the first condenser discharge pipe 134a and the second condenser inlet pipe 132b. The refrigerant discharged from the first condenser 130a is introduced into the second condenser 130b.

Here, the second condenser 130b condenses the introduced refrigerant in a state of low temperature and high pressure and discharges the refrigerant into the second condenser discharge pipe 134b.

In addition, the solenoid valve 172 is opened (ON) to transfer the refrigerant discharged to the second condenser discharge pipe (134b) to the sub-conveyor tube 170, the sub-conveyor tube 170 is a conveyed refrigerant transfer pipe ( 160).

In addition, the expansion valve 140 expands the refrigerant transferred to the transfer pipe 160 into a refrigerant having a low temperature and low pressure, and introduces the refrigerant into the evaporator 110 through the evaporator inlet pipe 112.

Here, the evaporator 110 is the refrigerant flowed in to absorb the heat of the room to generate cold air, discharge the cold air to the blowing fan (not shown) to lower the temperature of the room.

In addition, the refrigerant heat-exchanged with the air in the evaporator 110 is transferred to the first and first compressors 120a and 120b through the evaporator discharge pipe 114 again.

As such, when the first and second compressors 120a and 120b are operated (ON), the flow of the refrigerant is evaporator 110 → evaporator discharge pipe 114 → first and second compressor inlet pipes 122a, 122b) → first and second compressors 120a and 120b → first and second compressor discharge pipes 124a and 124b → condenser inlet pipe 132a → first condenser 130a → first condenser discharge pipe 134a ) → four-way switching member 150 → the second condenser inlet pipe (132b) → the second condenser 130b → the second condenser discharge pipe (134b) → solenoid valve 172 → secondary feed pipe 170 → transfer pipe (160 ) → expansion valve 140 → evaporator inlet pipe 112 → evaporator 110, this cycle is continuously repeated to control the temperature of the room.

On the other hand, as shown in Figure 4, looks at the refrigerant flow when only the first compressor (120a) of the first, the second compressor (120a, 120b) is turned on (ON).

First, the first compressor (120a) is introduced into the refrigerant discharged from the evaporator 110 through the evaporator discharge pipe 114 through the first compressor inlet pipe (122a).

In addition, the first compressor 120a compresses the refrigerant introduced into a high temperature and high pressure state and discharges the refrigerant into the first compressor discharge pipe 124a.

In addition, the condenser inlet pipe 132a allows the refrigerant discharged into the first compressor discharge pipe 134a to flow into the first condenser 130a.

The first condenser 130a condenses the refrigerant introduced through the condenser inlet pipe 132a in a state of low temperature and high pressure and discharges the refrigerant to the first condenser discharge pipe 134a.

At this time, the four-way switching member 150 disconnects the connection between the first condenser discharge pipe (134b) and the second condenser inlet pipe (134a) and at the same time connects the first condenser discharge pipe (134a) and the transfer pipe (160). The refrigerant discharged from the first condenser 130a is introduced into the transfer pipe 160.

In addition, the expansion valve 140 expands the refrigerant transferred to the transfer pipe 160 into a refrigerant having a low temperature and low pressure, and introduces the refrigerant into the evaporator 110 through the evaporator inlet pipe 112.

In addition, the evaporator 110 absorbs the heat in the room, generates cold air, and discharges the cold air to the blower fan to lower the temperature of the room.

Here, the second condenser 130b is stopped (OFF) so that the condensation capacity is not increased compared to the compression capacity, and the solenoid valve 172 is closed (OFF) so that the refrigerant conveyed to the transfer pipe 160 flows backward. It is prevented from flowing into the second condenser 130b.

As such, the flow of the refrigerant when only the first compressor 120a is operated among the first and second compressors 120a and 120b is evaporator 110 → evaporator discharge pipe 114 → first compressor inlet pipe 122a. ) → the first compressor (120a) → the first compressor discharge pipe (124a) → the condenser inlet pipe (132a) → the first condenser (130a) → the first condenser discharge pipe (134a) → four-way switching member 150 → transfer pipe 160 → expansion valve 140 → evaporator inlet pipe 112 → evaporator 110, this cycle is continuously repeated to control the temperature of the room.

On the other hand, as shown in Figure 5, when only the second compressor (120b) of the first and second compressors (120a 120b) is operated, the second compressor (120b) in the evaporator 110 evaporator discharge pipe ( The refrigerant discharged through the 114 is introduced through the second compressor inlet pipe 122b, and the second compressor 120b compresses the refrigerant introduced into the high temperature and high pressure state to discharge the refrigerant into the second compressor discharge pipe 124b. The subsequent process is the same as the refrigerant flow when only the first compressor 120a is operated among the first and second compressors 120a and 120b.

As such, the flow of the refrigerant when only the second compressor 120b is operated among the first and second compressors 120a and 120b is evaporator 110 → evaporator discharge pipe 114 → second compressor inlet pipe 122b. ) → the second compressor (120b) → the second compressor discharge pipe (124b) → the condenser inlet pipe (132a) → the first condenser (130a) → the first condenser discharge pipe (134a) → four-way switching member 150 → transfer pipe 160 → expansion valve 140 → evaporator inlet pipe 112 → evaporator 110, this cycle is continuously repeated to control the temperature of the room.

As described above, the air conditioner having two condensers according to one embodiment of the present invention, when both of the first and second compressors 120a and 120b are turned on, the first and second condensers 130a, 130b) is operated together to form a condensation volume so as to correspond to the compression capacities of the first and second compressors 120a and 120b to maintain a flat pressure. In this case, by operating only the first condenser 130a, a measurement volume is formed to correspond to the reduced compression capacity to maintain flat pressure.

In addition, the present invention is to maintain a constant pressure to smoothly flow the refrigerant to increase the cooling efficiency as well as to facilitate the recovery of the refrigerant is made to improve the durability of the parts.

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

Therefore, when the air conditioner having two compressors according to the present invention is used, the condenser is selectively operated to maintain a flat pressure so as to correspond to the change in the compression capacity according to the operation of the two compressors, so that the refrigerant flows smoothly and the cooling efficiency Not only is this increased, but the recovery of the refrigerant is made smoothly, and the durability is improved.

Claims (4)

First and second compressors for introducing and compressing the refrigerant discharged from the evaporator to the evaporator discharge pipe through the first and second compressor inlet pipes; A first condenser for condensing the refrigerant discharged into the first and second compressor discharge pipes of the first and second compressors through the condenser inlet pipe; A second condenser for condensing the refrigerant by introducing the refrigerant discharged into the first condenser discharge tube of the first condenser when both the first and second compressors are turned on; A transfer pipe allowing the refrigerant discharged to the first condenser discharge pipe to flow directly into the evaporator through an evaporator inlet pipe through an expansion valve when only one of the first and second compressors is turned on; It is connected between the first condenser discharge pipe of the first condenser, the second condenser inlet pipe of the second condenser and the conveying pipe and is switched according to the selective operation of the first and second compressors to selectively select the refrigerant. A four-way switching member for transferring; And a subconveyor tube configured to allow the refrigerant discharged to the second condenser discharge tube of the second condenser to be transferred to the transfer tube. The method of claim 1, The four-way switching member disconnects the first condenser discharge pipe and the transfer pipe when both the first and second compressors are turned on, and connects the first condenser discharge pipe and the second condenser inlet pipe. The air conditioner having two condensers characterized in that the refrigerant discharged from the first condenser is introduced into the second condenser. The method of claim 1, The four-way switching member disconnects the connection between the first condenser discharge pipe and the second condenser inlet pipe when only one of the first and second compressors is turned on, and the first condenser discharge pipe and the transfer pipe are disconnected. By connecting the air conditioner having two condensers characterized in that the refrigerant discharged from the first condenser to be transferred directly to the transfer pipe without passing through the second condenser. The method of claim 1, The sub-conduit pipe has an air conditioner having two compressors, characterized in that it comprises a solenoid valve to regulate the flow of the refrigerant discharged from the second condenser discharge pipe.

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