KR100819584B1 - An aircondition system having a accumulation means of cooling device - Google Patents

Abstract

An air conditioner having a refrigerant accumulation unit is provided to achieve equilibrium of pressure between suction/discharge parts of a continuous compressor by operating a flow conversion element to form an independent circuit for an intermittent compressor when the intermittent compressor is not in operation, and to prevent parts of refrigerant and oil discharged from a continuous compressor from disturbing refrigerant flow by mounting a solenoid valve at a position before the flow conversion element is joined to the discharge part of the continuous compressor. An air conditioner having a refrigerant accumulation unit includes a continuous compressor(10) mounted on a main circuit of a refrigerant line at a front end of a condenser(40) to operate continuously for compressing refrigerant, and a first accumulator(20) for stabilizing the refrigerant supplied from an evaporator(50) to supply the same to the continuous compressor. An intermittent compressor(10a) is branched from the continuous compressor and mounted in parallel with the same for operating when strong refrigerant flow is required. A second accumulator(20a) is positioned on a line at a position before the refrigerant enters into the intermittent compressor for supplying the refrigerant to the intermittent compressor in the stabilized state. A flow conversion element(60) is mounted at an output of the intermittent compressor to circulate the refrigerant via the intermittent compressor when the intermittent compressor is initiated together with the continuous compressor simultaneously and to block the refrigerant flow for forming an independent circuit line when the continuous compressor is initiated alone. A solenoid valve(30) is connected between outputs of the both compressors to open the refrigerant line for branching output of the continuous compressor when the intermittent compressor is not initiated, wherein the intermittent compressor is supplied with the refrigerant from the output of the continuous compressor so that the circuit line of the intermittent compressor has pressure kept higher than that of a suction part of the continuous compressor always.

Description

Air Conditioning System Having Refrigerant Accumulation Means {An Aircondition System Having a Accumulation Means of Cooling Device}

1 is a simultaneous operation state diagram of a typical two compressor operating air conditioner.

Figure 2 is a separate operation state of a typical two compressor operating air conditioner.

Figure 3 is a simultaneous operation of two compressor operating air conditioner of the present invention.

Figure 4 is a separate operation state of the two compressor operating air conditioner of the present invention.

Explanation of symbols on the main parts of the drawings

10: continuous compressor

10a: intermittent compressor

20: Accumulator for continuous compressor

20a: Accumulator for intermittent compressors

30: solenoid valve

40: condenser

50: evaporator

60: flow change means

70: high pressure tube

80: suction line

90: expansion tube

The present invention relates to an air conditioner having a refrigerant accumulating means, and in particular, by using two compressors, a refrigerant which is characterized by maximizing cooling efficiency by improving the structure of an air conditioner that can change the cooling capacity according to the cooling load. An air conditioner having an accumulating means.

The air conditioner is to maintain optimum temperature and humidity according to all climatic conditions and indoor environment. The air conditioner includes a cooling device and a heating device that cools or warms the indoor air, and a humidifier to maintain proper humidity, and indoor air. Ventilation device for discharging the outside to the outside is included.

The cooling device uses the phenomenon of absorbing the heat of the surroundings when the liquid evaporates to perform the cooling action. In addition to the cooling action, the cooling device also performs a dehumidification action. The cooling device having such a function is composed of a compressor for compressing the refrigerant into a gas of high temperature and high pressure, a condenser for liquefying the compressed high temperature and high pressure refrigerant, and a heat exchanger for evaporating the refrigerant expanded by the expansion valve. Cooling air heat-exchanged while passing through the heat exchanger is forcibly blown by the blower into the room that needs cooling.

On the other hand, in order to reduce the waste of energy efficiency, an air conditioner equipped with two compressors having different compression capacities that can be operated independently according to indoor load conditions has been developed.

1 is a simultaneous operation state diagram of a typical two compressor operating air conditioner,

2 is a diagram illustrating a separate operation state of two conventional compressor operation air conditioners,

The conventional air conditioner is composed of two compressors, a condenser for condensing the compressed refrigerant, an expansion valve for expanding the refrigerant, and an evaporator for evaporating the refrigerant, and additionally, a flow changing means is installed at the top of the intermittent compressor. In order to independently form the flow of the refrigerant and oil so as not to be influenced by the flow of the compressor at all times, a check valve for preventing the flow of reverse flow that prevents the refrigerant formed at high temperature and high pressure through the compressor from flowing back to the compressor is installed at the discharge port side of the compressor. .

In the air conditioner having two compressors configured as described above, when two compressors are operated at the same time when a high load is generated and one load is reached, one compressor stops and the remaining compressors continue to operate.

At this time, the discharge refrigerant pressure of the stationary compressor is independently formed using an intermittent compressor system by using a flow changing means, so that the pressure of the discharge unit and the suction unit is immediately parallel to improve restartability.

However, when the intermittent compressor is not operated for several hours or days, the intermittent compressor is parallel to the pressure of the suction side of the compressor due to the minute refrigerant leakage of the flow changing means.

Then, when the intermittent compressor is restarted, the operation of the flow change means is not desired and the purpose of simultaneously operating two compressors is lost.

Therefore, if a certain time is required to maintain higher than the suction pressure of the compressor, it is necessary to operate the intermittent compressor to form a pressure.If this equipment is not operated, it is impossible to maximize the effect of using two compressors in terms of efficient operation. do.

The present invention is to solve the above problems, by installing a solenoid valve on the top of the intermittent operation compressor instead of a check valve to ensure that the pressure of the intermittent compressor than the pressure of the continuous compressor inlet always maintains the intermittent compressor to recover At the same time, there is no problem.

As a means for achieving the above object,

The present invention provides an air conditioner including a condenser for condensing a compressed refrigerant, an expansion valve for expanding the refrigerant, and an evaporator for evaporating the refrigerant, wherein the air conditioner is installed on a main circuit of the refrigerant line in front of the condenser and is always started. The continuous compressor for compressing the refrigerant through; An accumulator for a continuous compressor for stabilizing the refrigerant supplied from the evaporator and supplying it to the continuous compressor; An intermittent compressor which is branched and installed in parallel with the continuous compressor and selectively operates only when a strong refrigerant flow is required; An accumulator for an intermittent compressor positioned in a line before the refrigerant flows into the intermittent compressor to allow the refrigerant to flow into the intermittent compressor in a stable state; A flow change means installed at an output end of the intermittent compressor to allow the refrigerant to circulate through the intermittent compressor when the continuous compressor is started simultaneously, and to block the flow of the refrigerant when starting the continuous compressor only to form an independent circuit line; The intermittent compressor is connected between the output side of the continuous compressor and the output side of the intermittent compressor, and when the intermittent compressor is not operated, the refrigerant line is opened to branch the output of the continuous compressor so that the intermittent compressor receives refrigerant from the output side of the continuous compressor. It features a circuit line that includes a solenoid valve that keeps the suction pressure of the continuous compressor at all times.

In addition, the flow changing means is characterized in that the four-way valve.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and the preferred embodiments associated with the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

3 is a simultaneous operation state diagram of two compressor operating air conditioner of the present invention,

Figure 4 is a state diagram of the individual operation of the two compressor operating air conditioner of the present invention,

The present invention largely includes a continuous compressor 10, a continuous compressor accumulator 20, an intermittent compressor 10a, an intermittent compressor accumulator 20a, a solenoid valve 30, a condenser 40, and an evaporator. 50, the flow change means 60, the high pressure pipe 70, the suction pipe 80, and the expansion pipe 90.

The continuous compressor 10 is installed on the main circuit of the refrigerant line, and serves to compress the refrigerant by starting at all times, and the accumulator 20 for the continuous compressor supplies the refrigerant before the refrigerant is supplied to the continuous compressor 10. It is made into a stable state and is supplied to the continuous compressor 10.

The intermittent compressor 10a is branched and installed in parallel from the main circuit of the refrigerant line, and is selectively operated only when a strong refrigerant flow is required. The accumulator 20a for the intermittent compressor flows into the intermittent compressor 10a. Located in the line before the entry, the refrigerant flows into the intermittent compressor 10a in a stable state.

The solenoid valve 30 is connected between the output side of the continuous compressor 10 and the output side of the intermittent compressor 10a, and the refrigerant line to branch the output of the continuous compressor 10 when the intermittent compressor 10a is not operated. By opening the intermittent compressor (10a) serves to maintain the appropriate pressure.

The condenser 40 is connected to an output terminal of the compressor 10 to condense the refrigerant output from the continuous compressor 10 or to output the refrigerant simultaneously through the continuous compressor 10 and the intermittent compressor 10a. It is in charge of condensation.

The high pressure pipe 70 is a refrigerant circulation passage connecting the compressor 10 and the condenser 40, and the suction pipe 80 is a refrigerant circulation passage connected to the front end of the compressor 10.

In addition, the expansion tube (90) serves to expand the compressed refrigerant, the evaporator 50 is connected to the rear end of the expansion tube (90) to take the ambient temperature while passing the expanded refrigerant to cool the surroundings Play a role.

That is, the present invention provides two compressors 10 and 10a, a solenoid valve 30 for blocking the refrigerant flow of the intermittent compressor, a condenser 40 for condensing the refrigerant, an evaporator 50 for evaporating the refrigerant, Between the accumulators 20 and 20a located at the inlets of the compressors 10 and 10a, the flow changing means 60 located at the upper end of the intermittent compressor 10a, and between the compressors 10 and 10a and the condenser 40. It is summarized as having the structure which consists of the high pressure pipe | tube 70, the suction pipe | tube 80 which connects the evaporator 50 and the accumulators 20 and 20a.

Looking at the operation of the present invention below.

First, when the air conditioner is operated using the continuous compressor 10 and the intermittent compressor 10a simultaneously, the intermittent compressor 10a and the continuous compressor 10 are driven, and the flow changing means 60 is intermittent. The circuit line at the output end of the compressor 10a is opened so that both the refrigerant passing through the intermittent compressor 10a and the refrigerant passing through the continuous compressor 10 are output.

The refrigerant is then circulated through the high pressure tube 70, the condenser 40, the expansion tube 90, the evaporator 50, the suction tube 80, and the accumulators 20 and 20a and cooled from the evaporator 50. Exchanged air and supply the refrigerant having the elevated temperature to the intermittent compressor (10a) and the continuous compressor (10) so that the refrigerant line is continuously maintained to achieve strong cooling.

On the other hand, when the constant load is reached, the intermittent compressor 10a is stopped and only the continuous compressor 10 is operated to increase cooling efficiency. In this case, the intermittent compressor 10a is stopped and at the same time, the flow change means 60 is stopped. ) To control the output of the refrigerant from the intermittent compressor (10a) to the condenser 40, the intermittent compressor (10a) is a self-circulating while forming a closed circuit, at the same time by operating the solenoid valve 30 to operate the continuous compressor (10) ) Output refrigerant is delivered to the circuit of the intermittent compressor to maintain higher than the suction pressure of the continuous compressor (10).

Then, when the intermittent compressor 10a and the continuous compressor 10 are started at the same time, the intermittent compressor 10a, which has a high internal pressure, immediately outputs the refrigerant, thereby maximizing the efficiency of using two compressors. It will be possible.

That is, conventionally, since there is no constituent means for connecting the refrigerant line to the intermittent compressor at the output of the continuous compressor such as the solenoid valve, when the intermittent compressor does not operate for several hours or days, the intermittent intermittent due to the minute refrigerant leakage of the flow change means In parallel with the pressure on the suction side of the compressor, when the intermittent compressor is restarted in this state, the efficiency of operating two compressors at the same time is inferior because the operation of the flow change means does not proceed smoothly. As described above, if the pressure of the intermittent compressor 10a can be maintained higher than the suction pressure of the continuous compressor 10, the operation of the flow change means 60 proceeds smoothly upon restarting so that the output refrigerant of the intermittent compressor 10a smoothly. The circulating motion proceeds naturally to maximize the efficiency.

As a result, the present invention operates the flow change means 60 when the intermittent compressor 10a stops, thereby forming the intermittent compressor 10a side as an independent network so that the discharge tube 70 pressure and the suction tube 80 pressure are increased. The solenoid valve 30 is installed at the position before the flow change means 60 and the continuous compressor 10 discharge part are laminated, and together with the flow change means 60, the balance of the intermittent compressor 10a side is achieved. By maintaining the pressure to be higher than the suction pressure of the continuous compressor 10 to eliminate the problem when restarting the system efficiency is improved to maximize the efficiency of the air conditioner according to the use of two compressors.

The operation of the present invention having the above-described configuration operates the flow changing means when the intermittent compressor is stopped to form the intermittent compressor as an independent system so that the discharge part pressure and the suction part pressure can be balanced in a short time, and at the same time, the flow change means The solenoid valve is positioned before the upper end and the continuous compressor discharge unit are laminated so that a part of the refrigerant and oil discharged from the continuous compressor are not obstructed in the refrigerant passage.

Accordingly, when the intermittent compressor is stopped, the accumulation of refrigerant and oil discharged from the continuous compressor may be essentially blocked.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, various other modifications and variations may be made without departing from the spirit and scope of the invention. Accordingly, it is intended that the appended claims cover such modifications and variations as fall within the true scope of the invention.

Claims (2)

An air conditioner comprising a condenser for condensing a compressed refrigerant, an expansion valve for expanding the refrigerant, and an evaporator for evaporating the refrigerant, A continuous compressor installed on the main circuit of the refrigerant line in front of the condenser and compressing the refrigerant through a start-up at all times; An accumulator for a continuous compressor for stabilizing the refrigerant supplied from the evaporator and supplying it to the continuous compressor; An intermittent compressor which is branched and installed in parallel with the continuous compressor and selectively operates only when a strong refrigerant flow is required; An accumulator for an intermittent compressor positioned in a line before the refrigerant flows into the intermittent compressor to allow the refrigerant to flow into the intermittent compressor in a stable state; A flow change means installed at an output end of the intermittent compressor to allow the refrigerant to circulate through the intermittent compressor when the continuous compressor is started simultaneously, and to block the flow of the refrigerant when starting the continuous compressor only to form an independent circuit line; The intermittent compressor is connected between the output side of the continuous compressor and the output side of the intermittent compressor, and when the intermittent compressor is not operated, the refrigerant line is opened to branch the output of the continuous compressor so that the intermittent compressor receives refrigerant from the output side of the continuous compressor. An air conditioner having a refrigerant accumulating means comprising a solenoid valve for maintaining a circuit line at a pressure higher than the suction pressure of a continuous compressor at all times. The method of claim 1, And said flow changing means is a four-way valve.

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