KR100992840B1 - Combined cooling system with natural circulation and steam - Google Patents

Abstract

The present invention relates to a natural circulation and steam compression combined use air conditioner, and more particularly, it is provided with a receiver to more smoothly control the flow of refrigerant in a conventional air conditioner operated in a natural circulation and steam compression type It is related with the cooling which raised efficiency. The receiver used in the air conditioner of the present invention is a receiver used for the air conditioner operated in a natural circulation and steam compression type, the tank unit for storing the liquid refrigerant, the inlet unit for receiving the refrigerant discharged from the condenser to the tank unit; And a first outlet portion communicating with a pipe having an inlet at a lower side inside the tank portion and positioned above a level of the liquid refrigerant, and installed at a bottom surface of the tank portion so that the liquid refrigerant flows out of the tank portion by gravity when opened. And a second outlet portion for exiting.

Steam compression, natural circulation, air conditioner, base station, receiver

Description

Natural Circulation and Vapor Condensing Type Air Conditioning Apparatus}

The present invention relates to a natural circulation and steam compression combined use air conditioner, and more particularly, it is provided with a receiver to more smoothly control the supply amount of refrigerant in a conventional air conditioner operated in a natural circulation and steam compression type It relates to an air conditioner with improved efficiency.

Recently, the demand for mobile communication is rapidly increasing, and thus, many base stations for mobile communication are installed. Since the base station is not only mounted inside the various high-density / high-precision communication equipment, but also installed on the roadside or the roof of a building, the base station is formed in a sealed enclosure to prevent the inflow of moisture and dust from the outside.

However, since most of the communication equipment installed in the base station is composed of integrated electronic components, its heat generation amount is considerable, but it is vulnerable to high temperature, and thus malfunctions often occur, thereby effectively removing heat generated in the sealed enclosure. A cooler is needed.

Since the enclosure of the mobile base station has a high internal temperature, the air conditioner needs to be operated not only in summer but also in winter when the temperature of the outside air is low. However, since the base station for mobile communication is made of a sealed enclosure as described above, it is not only able to directly draw outside air through the ventilation openings, but also adds to the cost in the case of additional installation of additional equipment such as a heat pipe. There is nothing else.

In order to solve this problem, the applicant has disclosed a technology for a natural circulation and steam compression operation using the thermal siphon principle through the Republic of Korea Patent No. 689704.

The prior patent technology of the present applicant will be described with reference to FIG. 1 as follows.

As shown in FIG. 1, a compressor 10 for compressing a refrigerant in a gaseous state is installed in the lower part of the air conditioner 1, and heat is released from the refrigerant pumped from the compressor 10 in the upper part thereof to cool the refrigerant. A condenser 20 for changing the phase of the liquid crystal, and a lower portion of the condenser 20 is connected to the receiver 21 for storing a refrigerant, and is phase-changed from the liquid state to the gas state while absorbing heat generated inside the air conditioner 1. The evaporator 40 is installed at the lower part of the air conditioner 1, and an expansion valve 30 is operated between the condenser 20 and the evaporator 40 when operated in a vapor compression type.

The pipe connected from the condenser 20 to the evaporator 40 is branched from one pipe to two pipes, and among the two pipes, the first pipe 22 is first open when operated in a natural circulation type. The solenoid valve SV1 is provided, and the second pipe 23 is provided with a second solenoid valve SV2 and an expansion valve 30 which are opened at the time of steam compression operation.

In addition, a pipe connected from the evaporator 40 to the compressor 10 and the condenser 20 is branched from one pipe to two pipes, and among these two pipes, the third pipe 41 is connected to the evaporator 40. A fourth solenoid valve (SV5) connected to the condenser (20) and opened at the time of natural circulation operation on the pipe and connected to the compressor (10) from the evaporator (40). Install the fourth solenoid valve SV4.

In addition, the condenser 20 has a condenser fan 24 for discharging the heat source remaining inside the cooler 1 as well as smoothly dissipating heat of the refrigerant in the gaseous state fed by the evaporator 40. Install at the proper location near the front or around the condenser (20).

In addition, the evaporator 40 is provided with an evaporator fan 43 at an appropriate position in front of or around the evaporator 40, as in the condenser 20, and at a predetermined position inside the air conditioner 1 in the cabinet 1. An internal temperature sensor T1 for measuring a temperature is installed, and an external temperature sensor T2 (not shown) for measuring a temperature outside the cabinet 1 is installed at an external predetermined position.

The condenser fan 24 and the evaporator fan 43 are operated both in a natural circulation operation or in a vapor compression operation to greatly increase the efficiency of the condenser 20 and the evaporator 40 and replenish refrigerant. The lower part of the receiver 21 is provided with a dry filter 25 for washing the refrigerant.

The air conditioner of the prior art automatically switches the air conditioner to the natural circulation by a temperature sensor in winter when the temperature difference between the indoor and outdoor is large. To this end, the first and fifth solenoid valves SV1 and SV5 are opened, and the second and fourth solenoid valves SV2 and SV4 are closed. At this time, the compressor 10 is not operated.

 Since cold air of outside air is sucked into the condenser fan 24 and cooled by the condenser 20, the refrigerant is condensed and introduced into the lower evaporator 40. Since the condenser 20 is installed higher than the evaporator 40, the condenser The refrigerant of 20 is supplied to the evaporator 40 by the difference in potential energy.

Thereafter, since the heat inside the air conditioner 1 passes through the evaporator 40 and evaporates the refrigerant, the refrigerant reaches the condenser 20 and cools down with cold air of the outside air and condenses as described above. Repeat.

In addition, the air conditioner of the prior art is automatically switched to the steam compression type by the temperature sensor in the summer season when the temperature difference between the indoor and outdoor is small. To this end, the first and fifth solenoid valves SV1 and SV5 are closed, the second and fourth solenoid valves SV2 and SV4 are opened, and the compressor 10 is operated. Thereafter, the refrigerant compressed by the compressor 10 to the high temperature and high pressure refrigerant, such as a conventional air conditioner, flows in the order of condenser, receiver, expansion valve, evaporator, and compressor to achieve cooling.

In addition, in the conventional technology, a conventional receiver as shown in FIG. 2 is used. The conventional receiver 21 has an inlet part I installed at an upper end thereof, and from the pipe 121 extended to an inner lower end of the receiver. Since the liquid refrigerant (C) inside the receiver is discharged through the communicating outlet (O), it is possible to implement this only in a small air conditioner where the difference in the amount of refrigerant required for the vapor compression type and the natural circulation type is not so large. . However, in the case of large air conditioners, the difference in the amount of refrigerant that can create optimum conditions in each method is significant when operating in a steam compression or natural circulation method, and when the same amount of refrigerant is used, the two methods cannot be used alternately. That is, since the amount of refrigerant required in the natural circulation operation is larger than the amount of refrigerant required in the operation of steam compression, there is a problem in that it is necessary to replenish or remove the refrigerant for each season.

The present invention has been made to solve the above problems,

By providing the air conditioner that does not need to replenish or remove the refrigerant according to the season, it is possible to simultaneously apply natural circulation and steam compression cooling to the large air conditioner, and to allow the refrigerant to flow out smoothly under the receiver. The purpose is to raise the efficiency of the air conditioner.

Natural circulating and steam compression combined air conditioner of claim 1 of the present invention

A compressor for compressing the refrigerant to a high pressure, a condenser for condensing the transferred refrigerant, a receiver for supplying the refrigerant from the condenser and discharging only the liquid refrigerant, and an expansion valve for supplying the refrigerant from the receiver to a low / low pressure state. And, in the natural circulation and steam compression combined cooler comprising a refrigerant supplied with a refrigerant to absorb the surrounding heat and supply the refrigerant to the compressor or condenser,

The receiver is in communication with a tank portion in which the liquid refrigerant is stored, an inlet portion for supplying the refrigerant discharged from the condenser to the tank portion, and a pipe having an inlet at a lower side inside the tank portion and positioned above the level of the liquid refrigerant. A first outlet portion and a second outlet portion provided at a bottom surface side of the tank portion to allow a liquid refrigerant to flow out of the tank portion by gravity when opened;

The condenser is installed at a position higher than the receiver, the receiver is installed at a position higher than the evaporator, and the inlet of the evaporator is installed at a position lower than the outlet of the evaporator;

A first valve connected to the second outlet to allow or block the refrigerant from the second outlet and flow into the evaporator;

 And a second valve allowing the refrigerant discharged from the evaporator to flow to either the compressor or the condenser,

The refrigerant discharged from the first outlet portion is supplied to the evaporator through an expansion valve;

When operated in natural circulation, the first valve is opened to allow refrigerant to flow from the evaporator to the condenser;

The first valve is closed when the operation is steam compression, and the refrigerant flows from the evaporator to the compressor by the second valve.

Natural circulation type and steam compression combined use air conditioner of claim 2 of the present invention,

A compressor for compressing the refrigerant to a high pressure, a condenser for condensing the transferred refrigerant, a receiver for supplying the refrigerant from the condenser and discharging only the liquid refrigerant, and an expansion valve for supplying the refrigerant from the receiver to a low / low pressure state. And, in the natural circulation and steam compression combined cooler comprising a refrigerant supplied with a refrigerant to absorb the surrounding heat and supply the refrigerant to the compressor or condenser,

The receiver is in communication with a tank portion in which the liquid refrigerant is stored, an inlet portion for supplying the refrigerant discharged from the condenser to the tank portion, and a pipe having an inlet at a lower side inside the tank portion and positioned above the level of the liquid refrigerant. A first outlet portion and a second outlet portion provided at a bottom surface side of the tank portion to allow a liquid refrigerant to flow out of the tank portion by gravity when opened;

The condenser is installed at a position higher than the receiver, the receiver is installed at a position higher than the evaporator, and the inlet of the evaporator is installed at a position lower than the outlet of the evaporator;

A directional valve, comprising: a 1-1 input port through which a refrigerant discharged from the first outlet part is input through an expansion valve, and a 1-2 input port connected to the second outlet part, wherein the first discharge port is an evaporator A first valve connected with the first valve;

 A second valve allowing flow of the refrigerant discharged from the evaporator to either the compressor or the condenser;

When operated in natural circulation, the first valve communicates with the first 1-2 input ports and the first outlet port so that the refrigerant is supplied to the evaporator, while the second valve allows the refrigerant to flow to the condenser;

When operating in a vapor compression type, the 1-2 input port is closed and the 1-1 input port and the first discharge port communicate with each other, and the refrigerant discharged to the second outlet is supplied to the evaporator through an expansion valve, Characterized in that the refrigerant flows to the compressor by the valve.

The natural circulation type and steam compression combined use air conditioner of claim 3 of the present invention

A compressor for compressing the refrigerant to a high pressure, a condenser for condensing the transferred refrigerant, a receiver for supplying the refrigerant from the condenser and discharging only the liquid refrigerant, and an expansion valve for supplying the refrigerant from the receiver to a low / low pressure state. And, in the natural circulation and steam compression combined cooler comprising a refrigerant supplied with a refrigerant to absorb the surrounding heat and supply the refrigerant to the compressor or condenser,

The receiver is in communication with a tank portion in which the liquid refrigerant is stored, an inlet portion for supplying the refrigerant discharged from the condenser to the tank portion, and a pipe having an inlet at a lower side inside the tank portion and positioned above the level of the liquid refrigerant. A first outlet portion and a second outlet portion provided at a bottom surface side of the tank portion to allow a liquid refrigerant to flow out of the tank portion by gravity when opened;

The condenser is installed at a position higher than the receiver, the receiver is installed at a position higher than the evaporator, and the inlet of the evaporator is installed at a position lower than the outlet of the evaporator;

A first valve connected to the second outlet to allow or block the refrigerant from the second outlet and flow into the evaporator;

 A second valve allowing the refrigerant discharged from the evaporator to flow to either the compressor or the condenser;

A third valve installed downstream of the first valve, the third valve allowing or blocking the refrigerant supplied from the receiver to be directly introduced into the evaporator,

When operated in natural circulation, the first and third valves are opened, allowing the refrigerant to flow from the evaporator to the condenser by a second valve;

When operated in vapor compression, the first and third valves are closed to allow refrigerant supplied from the receiver to flow into the evaporator only via an expansion valve and to allow refrigerant to flow from the evaporator to the compressor by a second valve; It is characterized by.

Natural circulating and steam compression combined air conditioner of claim 4 of the present invention

A compressor for compressing the refrigerant to a high pressure, a condenser for condensing the transferred refrigerant, a receiver for supplying the refrigerant from the condenser and discharging only the liquid refrigerant, and an expansion valve for supplying the refrigerant from the receiver to a low / low pressure state. And, in the natural circulation and steam compression combined cooler comprising a refrigerant supplied with a refrigerant to absorb the surrounding heat and supply the refrigerant to the compressor or condenser,

The receiver is in communication with a tank portion in which the liquid refrigerant is stored, an inlet portion for supplying the refrigerant discharged from the condenser to the tank portion, and a pipe having an inlet at a lower side inside the tank portion and positioned above the level of the liquid refrigerant. A first outlet portion and a second outlet portion provided at a bottom surface side of the tank portion to allow a liquid refrigerant to flow out of the tank portion by gravity when opened;

The condenser is installed at a position higher than the receiver, the receiver is installed at a position higher than the evaporator, and the inlet of the evaporator is installed at a position lower than the outlet of the evaporator;

A directional valve, comprising: a first valve having a first input port connected to a first outlet, a first input port connected to the second outlet, and a first outlet port;

 A second valve allowing the refrigerant discharged from the evaporator to flow to either the compressor or the condenser;

A third valve installed downstream of the first valve and allowing or blocking a refrigerant supplied from the first discharge port from being directly introduced into the evaporator,

When operating in a natural circulation type, the first 1-2 input port and the first discharge port communicate with each other, and the third valve is opened so that the refrigerant supplied from the first discharge port passes directly through the third valve to the evaporator. Allowing two refrigerants to flow from the evaporator to the condenser;

When operated by steam compression, the 1-2 input port is closed, the 1-1 input port and the first discharge port communicate with each other, the third valve is closed, and the refrigerant discharged from the first discharge port opens the expansion valve. It is to be introduced into the evaporator via, and the refrigerant flows from the evaporator to the compressor by the second valve.

Natural circulating and steam compression combined air conditioner of claim 5 of the present invention

A compressor for compressing the refrigerant to a high pressure, a condenser for condensing the transferred refrigerant, a receiver for supplying the refrigerant from the condenser and discharging only the liquid refrigerant, and an expansion valve for supplying the refrigerant from the receiver to a low / low pressure state. And, in the natural circulation and steam compression combined cooler comprising a refrigerant supplied with a refrigerant to absorb the surrounding heat and supply the refrigerant to the compressor or condenser,

The receiver is in communication with a tank portion in which the liquid refrigerant is stored, an inlet portion for supplying the refrigerant discharged from the condenser to the tank portion, and a pipe having an inlet at a lower side inside the tank portion and positioned above the level of the liquid refrigerant. A first outlet portion and a second outlet portion provided at a bottom surface side of the tank portion to allow liquid refrigerant to flow out of the tank portion by gravity when opened;

The condenser is installed at a position higher than the receiver, the receiver is installed at a position higher than the evaporator, and the inlet of the evaporator is installed at a position lower than the outlet of the evaporator;

A first valve connected to the second outlet to allow or block a refrigerant from the second outlet and flow into the evaporator;

 A second valve allowing the refrigerant discharged from the evaporator to flow to either the compressor or the condenser;

A third input port installed downstream of the first valve, into which the refrigerant supplied from the receiver flows, a third first discharge port in direct communication with the inlet of the evaporator, and a third second in communication with the expansion valve; A third valve having a discharge port,

When operating in natural circulation, the first valve is opened and the refrigerant supplied to the third input port flows directly into the evaporator through the 3-1 discharge port, and the refrigerant flows from the evaporator to the condenser by the second valve. ;

When operated by steam compression, the first valve is closed and the refrigerant supplied to the third input port is discharged to the 3-2 discharge port and flows into the evaporator via the expansion valve, and the compressor is operated from the evaporator by the second valve. To allow the refrigerant to flow.

Natural circulating and steam compression combined air conditioner of claim 6 of the present invention

A compressor for compressing the refrigerant to a high pressure, a condenser for condensing the transferred refrigerant, a receiver for supplying the refrigerant from the condenser and discharging only the liquid refrigerant, and an expansion valve for supplying the refrigerant from the receiver to a low / low pressure state. And, in the natural circulation and steam compression combined air conditioner comprising a refrigerant supplied from the expansion valve absorbs the surrounding heat and supplies the refrigerant to the compressor or condenser,

The receiver is in communication with a tank portion in which the liquid refrigerant is stored, an inlet portion for supplying the refrigerant discharged from the condenser to the tank portion, and a pipe having an inlet at a lower side inside the tank portion and positioned above the level of the liquid refrigerant. A first outlet portion and a second outlet portion provided at a bottom surface side of the tank portion to allow a liquid refrigerant to flow out of the tank portion by gravity when opened;

The condenser is installed at a position higher than the receiver, the receiver is installed at a position higher than the evaporator, and the inlet of the evaporator is installed at a position lower than the outlet of the evaporator;

A directional valve, comprising: a first valve having a first input port connected to a first outlet, a first input port connected to the second outlet, and a first outlet port;

 A second valve allowing the refrigerant discharged from the evaporator to flow to either the compressor or the condenser;

A third input port installed downstream of the first valve, into which the refrigerant supplied from the receiver flows, a third first discharge port in direct communication with the inlet of the evaporator, and a third second in communication with the expansion valve; A third valve having a discharge port,

When operating in a natural circulation type, the first 1-2 input port and the first discharge port communicate with each other, and the refrigerant supplied to the third input port flows directly into the evaporator through the third-1 discharge port, and is operated by the second valve. Allow refrigerant to flow from the evaporator to the condenser;

When operated by steam compression, the 1-2 input port is closed and the 1-1 input port and the first discharge port communicate with each other, and the refrigerant supplied to the third input port is discharged through the 3-2 discharge port and expanded. It is to be introduced into the evaporator via the valve, and the refrigerant flows from the evaporator to the compressor by the second valve.

Natural circulating and steam compression combined air conditioner of claim 7 of the present invention

In the invention according to any one of claims 1 to 6,

The second valve is installed at the inlet of the compressor and the second valve for allowing or blocking the flow of refrigerant from the evaporator to the inlet of the compressor, and the second to allow or block the refrigerant from flowing directly from the evaporator to the condenser; It is characterized by consisting of two valves.

The natural circulation type and steam compression combined use air conditioner of claim 8 of the present invention

In the invention according to any one of claims 1 to 6,

The second valve is a direction switching valve comprising a second input port in communication with the evaporator, a 2-1 output port in communication with the inlet of the compressor, and a 2-2 output port in communication with the inlet of the condenser do.

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According to the present invention, there is no need to replenish or remove the refrigerant according to the season in the operation of the air conditioner to extend the life of the air conditioner, the large capacity of the air conditioner is possible, the structure is simple and the effect of reducing energy consumption have.

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

3 is a view showing the structure of an embodiment air conditioner of claim 1 of the present invention.

The air conditioner of the present embodiment includes a compressor 10 for compressing a refrigerant to a high pressure, a condenser 20 for condensing the transferred refrigerant, a receiver 21 for supplying a refrigerant from the condenser 20 and discharging only the liquid refrigerant; The expansion valve 25 receives the refrigerant from the receiver 21 and switches to a low temperature / low pressure state, and receives the refrigerant to absorb ambient heat and supplies the refrigerant to the compressor 10 or the condenser 20. In the point including the evaporator 40, etc., it is the same as the conventional natural circulation type and steam compression type combined use air conditioner.

The condenser 10 is installed at a position higher than the receiver 21, the receiver 21 is installed at a position higher than the evaporator 40, and the inlet of the evaporator 40 is lower than the outlet of the evaporator 40. When installed in a natural circulation operation, the refrigerant is supplied to the condenser-reactor-evaporator by gravity and allows evaporation to occur smoothly.

The receiver 21 of the present invention, as shown in Figure 4, the tank portion 122, the liquid refrigerant is stored, the inlet portion (I) receiving the refrigerant discharged from the condenser to the tank portion, and the tank portion 122 The first outlet portion O-1 which is in communication with the pipe 121 having an inlet on the lower side and located above the level of the liquid refrigerant C, and is installed on the bottom side of the tank portion 122 and gravity at the time of opening. The second outlet part O-2 which makes liquid phase liquid C flow out of the said tank part 122 by the said is provided.

In this embodiment, the first valve is connected to the second outlet (O-2) of the receiver and the first valve for opening and closing the conduit to which the refrigerant discharged from the second outlet (O-2) is directly supplied to the evaporator 40 ( V1) and a second valve which allows the refrigerant discharged from the evaporator 40 to flow to either the compressor 10 or the condenser 20.

In FIG. 3, the second valve includes a 2-1 valve V2-1 installed at an inlet of the compressor to allow or block a refrigerant from entering the inlet of the compressor 10 from the evaporator 40, and an evaporator ( 40 is shown consisting of a 2-2 valve (V2-2) that allows or blocks the refrigerant from flowing directly into the condenser 20,

As shown in FIG. 5, the second valve V2 is a direction switching valve, and a second input port V2I communicating with an evaporator and a 2-1th output port V2O-1 communicating with an inlet of the compressor 10. ), And the second-2 output port V2O-2 in communication with the inlet of the condenser 20, the refrigerant introduced from the evaporator 40 in accordance with the operation of the second valve V2 is supplied to the compressor 10. Or the condenser 20 can be flowed.

When operated in a natural circulation type, the first valve V1 is opened so that the refrigerant discharged to the second outlet portion O-2 of the receiver 21 passes through the first valve V1 to the inlet of the evaporator 40. Since the furnace is directly supplied by gravity, pipeline resistance and the like are removed to smoothly supply the refrigerant.

In addition, since the first outlet portion O-2 of the receiver 21 is not closed, the refrigerant flows to the expansion valve 30 in communication with the first outlet portion O-1 according to the siphon principle. According to the structure of (30) and the pipe resistance of the pipe bent downward connected to the first outlet (O-1), only a very small amount flows so that it has little effect on the efficiency of the air conditioner.

The refrigerant supplied to the evaporator 40 is evaporated in the evaporator 40 and discharged to the outlet of the evaporator 40, and the 2-1 valve V2-1 is closed and the 2-2 valve V2-2 is closed. Is open to the condenser 20 and not to the compressor 10.

Accordingly, the refrigerant flows through the condenser 20, the receiver 21, the evaporator 40, and the condenser 20 in order to achieve natural circulation cooling.

When operated in a steam compression type, the refrigerant is supplied from the compressor 10 to the condenser 20 and from the condenser 20 to the receiver 21 like a conventional steam compression air conditioner, and the first valve V1 is closed. Therefore, the liquid refrigerant of the receiver 21 is discharged only through the first outlet portion 0-1 to be supplied to the expansion valve 30. A dry filter 25 may be provided between the first outlet portion and the expansion valve 30 as necessary. The refrigerant supplied from the expansion valve 30 to the evaporator 40 is evaporated from the evaporator 40 and then discharged to the outlet of the evaporator 40, and the 2-1 valve V2-1 is opened and the 2-2 Since the valve V2-2 is closed, the valve V2-2 is not supplied to the condenser 20 but only to the compressor 10.

 Accordingly, the refrigerant flows in the order of the compressor 10, the condenser 20, the receiver 21, the evaporator 40, the compressor 10, and the vapor compression cooling is achieved.

Next, an embodiment of claim 2 of the present invention will be described with reference to FIG. 6.

In contrast to the embodiment of claim 1 described above, there is a difference in the position and function of the first valve V1.

The first valve V1 of the second embodiment is a direction switching valve, and the first-first input port V1I-1 through which the refrigerant discharged from the first outlet O-1 is input through the expansion valve 30. ) And a first input port (V1I-2) connected to the second outlet (O-2), and a first discharge port (V1O) is connected to the evaporator 40.

When operating in a natural circulation type, the first valve V1 communicates with the first and second input ports V1I-2 and V1O so that the refrigerant is supplied to the evaporator 40. At this time, the first and second input ports V1I-1 and V1I-2 may communicate with the first discharge port V1O due to the structure of the directional valve, as described in the embodiment of claim 1. The refrigerant discharged to the first outlet O-1 does not affect the performance of the air conditioner in a very small amount, while the refrigerant discharged to the second outlet O-2 is smoothly transferred to the evaporator 40 by gravity. It will be able to flow.

In the case of steam compression operation, the first valve V1 is closed with the 1-2 input port V1I-2, and the first-1 input port V1I-1 and the first discharge port V1O are closed. The refrigerant communicated with the first outlet O-1 is supplied to the evaporator 40 via the expansion valve 30. In addition, the refrigerant flows only to the compressor 10 by the 2-1, 2-2 valves V2-1 and V2-2 is the same as the embodiment of claim 1 above.

7 relates to the embodiment of claim 3, in contrast to the embodiment of claim 1, further comprising a third valve V3, wherein the refrigerant supplied from the receiver 21 by the third valve is evaporator 40. There is a difference in that it is determined whether to be supplied directly to the evaporator 40 through the expansion valve 30.

The third valve V3 is installed downstream of the first valve V1 and allows or blocks the refrigerant supplied from the receiver 21 to directly enter the evaporator 40.

When operating in natural circulation, the first and third valves V1 and V3 are opened, and the condenser 20 in the evaporator 40 by the second and second valves V2-1 and V2-2. The refrigerant flows into the furnace.

At this time, some of the refrigerant may also flow to the expansion valve 30 side, but only a small amount of refrigerant flows due to the structure of the expansion valve 30 does not significantly affect the performance of the air conditioner.

When operated in a vapor compression type, the first and third valves V1 and V3 are closed to allow the refrigerant supplied from the receiver 21 to enter the evaporator 40 only via the expansion valve 30. The refrigerant flows from the evaporator 40 to the compressor 10 by -1 and 2-2 valves V2-1 and V2-2.

FIG. 8 is an embodiment of claim 4, and has a difference in that the first valve V1 is replaced with the first valve V1 of claim 2, which is a directional switching valve. Those skilled in the art having an understanding of the embodiments of claims 2 and 3 will readily understand the principles of claim 4 through FIG. 8.

FIG. 9 is an embodiment of claim 5, and has a difference in that the third valve V3 is formed as a direction switching valve in the above-described embodiment of claim 3. The third valve V3 is installed downstream of the first valve V1, and is directly in communication with the third input port V3I through which the refrigerant supplied from the receiver flows, and the inlet of the evaporator 40. A 3-1 discharge port V3O-1 and a 3-2 discharge port V3O-2 communicating with the expansion valve 30 are provided. Those skilled in the art having an understanding of the above embodiments will readily understand the principles of claim 5 through FIG. 9.

FIG. 10 is an embodiment of claim 6, which differs in that the first valve V1 is replaced with the first valve V1 of claim 2, which is a directional switching valve. Those skilled in the art having an understanding of the embodiments of claims 2 and 5 will readily understand the principle of claim 6 through FIG. 10.

In the above embodiments, the components to be mounted outside the enclosure in which the communication equipment is installed are indicated in a dotted box labeled RO, and the components to be mounted inside the enclosure are indicated in a dotted box labeled RI. The evaporator 40 is installed inside the enclosure to absorb heat inside the enclosure, the condenser 20 and the compressor 10 are installed outside the enclosure and the remaining components can be installed inside and outside the enclosure as required by those skilled in the art, respectively. Will be taken for granted.

The first, second, and third valves described in the present embodiments may be any of a solenoid valve operated by a temperature sensor and a control unit, a temperature-sensitive valve in which desired operation is performed at a set cloud level, and a valve which is directly operated manually. Those skilled in the art will be able to implement this.

1 is a view showing an example of a conventional natural circulation and steam compression combined use air conditioner.

Figure 2 is a view showing the structure of a conventional receiver.

Figure 3 is a view showing the structure of an air conditioner of a first embodiment of the present invention.

Figure 4 is a view showing the structure of the receiver of the present invention.

5 is a view showing another cooler structure of the first embodiment of the present invention.

Figure 6 is a view showing the structure of an air conditioner of a second embodiment of the present invention.

7 is a view showing the structure of an air conditioner according to a third embodiment of the present invention.

8 is a view showing the structure of an air conditioner according to a fourth embodiment of the present invention.

9 is a view showing the structure of an air conditioner according to a fifth embodiment of the present invention.

10 is a view showing the structure of an air conditioner of a sixth embodiment of the present invention.

** Explanation of symbols on the main parts of the drawing **

10: compressor 20: condenser 21: receiver

30 expansion valve 40 evaporator Vx x-th valve

Claims (9)

A compressor for compressing the refrigerant to a high pressure, a condenser for condensing the transferred refrigerant, a receiver for supplying the refrigerant from the condenser and discharging only the liquid refrigerant, and an expansion valve for supplying the refrigerant from the receiver to a low / low pressure state. And, in the natural circulation and steam compression combined cooler comprising a refrigerant supplied with a refrigerant to absorb the surrounding heat and supply the refrigerant to the compressor or condenser, The receiver is in communication with a tank portion in which the liquid refrigerant is stored, an inlet portion for supplying the refrigerant discharged from the condenser to the tank portion, and a pipe having an inlet at a lower side inside the tank portion and positioned above the level of the liquid refrigerant. A first outlet portion and a second outlet portion provided at a bottom surface side of the tank portion to allow a liquid refrigerant to flow out of the tank portion by gravity when opened; The condenser is installed at a position higher than the receiver, the receiver is installed at a position higher than the evaporator, and the inlet of the evaporator is installed at a position lower than the outlet of the evaporator; A first valve connected to the second outlet to allow or block the refrigerant from the second outlet and flow into the evaporator;  And a second valve allowing the refrigerant discharged from the evaporator to flow to either the compressor or the condenser, The refrigerant discharged from the first outlet portion is supplied to the evaporator through an expansion valve; When operated in natural circulation, the first valve is opened to allow refrigerant to flow from the evaporator to the condenser; The first valve is closed when the operation is steam compression, by the second valve to allow the refrigerant flow from the evaporator to the compressor; natural circulation type and steam compression combined cooler. A compressor for compressing the refrigerant to a high pressure, a condenser for condensing the transferred refrigerant, a receiver for supplying the refrigerant from the condenser and discharging only the liquid refrigerant, and an expansion valve for supplying the refrigerant from the receiver to a low / low pressure state. And, in the natural circulation and steam compression combined cooler comprising a refrigerant supplied with a refrigerant to absorb the surrounding heat and supply the refrigerant to the compressor or condenser, The receiver is in communication with a tank portion in which the liquid refrigerant is stored, an inlet portion for supplying the refrigerant discharged from the condenser to the tank portion, and a pipe having an inlet at a lower side inside the tank portion and positioned above the level of the liquid refrigerant. A first outlet portion and a second outlet portion provided at a bottom surface side of the tank portion to allow a liquid refrigerant to flow out of the tank portion by gravity when opened; The condenser is installed at a position higher than the receiver, the receiver is installed at a position higher than the evaporator, and the inlet of the evaporator is installed at a position lower than the outlet of the evaporator; A directional valve, comprising: a 1-1 input port through which a refrigerant discharged from the first outlet part is input through an expansion valve, and a 1-2 input port connected to the second outlet part, wherein the first discharge port is an evaporator A first valve connected with the first valve;  A second valve allowing flow of the refrigerant discharged from the evaporator to either the compressor or the condenser; When operated in natural circulation, the first valve communicates with the first 1-2 input ports and the first outlet port so that the refrigerant is supplied to the evaporator, while the second valve allows the refrigerant to flow to the condenser; When operating in a vapor compression type, the 1-2 input port is closed and the 1-1 input port and the first discharge port communicate with each other, and the refrigerant discharged to the second outlet is supplied to the evaporator through an expansion valve, The refrigerant flows into the compressor by the valve; Natural circulation type and steam compression combined cooler. A compressor for compressing the refrigerant to a high pressure, a condenser for condensing the transferred refrigerant, a receiver for supplying the refrigerant from the condenser and discharging only the liquid refrigerant, and an expansion valve for supplying the refrigerant from the receiver to a low / low pressure state. And, in the natural circulation and steam compression combined cooler comprising a refrigerant supplied with a refrigerant to absorb the surrounding heat and supply the refrigerant to the compressor or condenser, The receiver is in communication with a tank portion in which the liquid refrigerant is stored, an inlet portion for supplying the refrigerant discharged from the condenser to the tank portion, and a pipe having an inlet at a lower side inside the tank portion and positioned above the level of the liquid refrigerant. A first outlet portion and a second outlet portion provided at a bottom surface side of the tank portion to allow a liquid refrigerant to flow out of the tank portion by gravity when opened; The condenser is installed at a position higher than the receiver, the receiver is installed at a position higher than the evaporator, and the inlet of the evaporator is installed at a position lower than the outlet of the evaporator; A first valve connected to the second outlet to allow or block the refrigerant from the second outlet and flow into the evaporator;  A second valve allowing the refrigerant discharged from the evaporator to flow to either the compressor or the condenser; A third valve installed downstream of the first valve, the third valve allowing or blocking the refrigerant supplied from the receiver to be directly introduced into the evaporator, When operated in natural circulation, the first and third valves are opened, allowing the refrigerant to flow from the evaporator to the condenser by a second valve; When operated in vapor compression, the first and third valves are closed to allow refrigerant supplied from the receiver to flow into the evaporator only via an expansion valve and to allow refrigerant to flow from the evaporator to the compressor by a second valve; Combined natural circulation and steam compression type air conditioner, characterized in that. A compressor for compressing the refrigerant to a high pressure, a condenser for condensing the transferred refrigerant, a receiver for supplying the refrigerant from the condenser and discharging only the liquid refrigerant, and an expansion valve for supplying the refrigerant from the receiver to a low / low pressure state. And, in the natural circulation and steam compression combined air conditioner comprising a refrigerant supplied from the expansion valve absorbs the surrounding heat and supplies the refrigerant to the compressor or condenser, The receiver is in communication with a tank portion in which the liquid refrigerant is stored, an inlet portion for supplying the refrigerant discharged from the condenser to the tank portion, and a pipe having an inlet at a lower side inside the tank portion and positioned above the level of the liquid refrigerant. A first outlet portion and a second outlet portion provided at a bottom surface side of the tank portion to allow a liquid refrigerant to flow out of the tank portion by gravity when opened; The condenser is installed at a position higher than the receiver, the receiver is installed at a position higher than the evaporator, and the inlet of the evaporator is installed at a position lower than the outlet of the evaporator; A directional valve, comprising: a first valve having a first input port connected to a first outlet, a first input port connected to the second outlet, and a first outlet port;  A second valve allowing the refrigerant discharged from the evaporator to flow to either the compressor or the condenser; A third valve installed downstream of the first valve and allowing or blocking a refrigerant supplied from the first discharge port from being directly introduced into the evaporator, When operating in a natural circulation type, the first 1-2 input port and the first discharge port communicate with each other, and the third valve is opened so that the refrigerant supplied from the first discharge port passes directly through the third valve to the evaporator. Allowing two refrigerants to flow from the evaporator to the condenser; When operated by steam compression, the 1-2 input port is closed, the 1-1 input port and the first discharge port communicate with each other, the third valve is closed, and the refrigerant discharged from the first discharge port opens the expansion valve. And a refrigerant flows from the evaporator to the compressor by a second valve via the second valve, and the natural circulation type and the vapor compression type air conditioner. A compressor for compressing the refrigerant to a high pressure, a condenser for condensing the transferred refrigerant, a receiver for supplying the refrigerant from the condenser and discharging only the liquid refrigerant, and an expansion valve for supplying the refrigerant from the receiver to a low / low pressure state. And, in the natural circulation and steam compression combined cooler comprising a refrigerant supplied with a refrigerant to absorb the surrounding heat and supply the refrigerant to the compressor or condenser, The receiver is in communication with a tank portion in which the liquid refrigerant is stored, an inlet portion for supplying the refrigerant discharged from the condenser to the tank portion, and a pipe having an inlet at a lower side inside the tank portion and positioned above the level of the liquid refrigerant. A first outlet portion and a second outlet portion provided at a bottom surface side of the tank portion to allow a liquid refrigerant to flow out of the tank portion by gravity when opened; The condenser is installed at a position higher than the receiver, the receiver is installed at a position higher than the evaporator, and the inlet of the evaporator is installed at a position lower than the outlet of the evaporator; A first valve connected to the second outlet to allow or block a refrigerant from the second outlet and flow into the evaporator;  A second valve allowing the refrigerant discharged from the evaporator to flow to either the compressor or the condenser; A third input port installed downstream of the first valve, into which the refrigerant supplied from the receiver flows, a third first discharge port in direct communication with the inlet of the evaporator, and a third second in communication with the expansion valve; A third valve having a discharge port, When operating in natural circulation, the first valve is opened and the refrigerant supplied to the third input port flows directly into the evaporator through the 3-1 discharge port, and the refrigerant flows from the evaporator to the condenser by the second valve. ; When operated by steam compression, the first valve is closed and the refrigerant supplied to the third input port is discharged to the 3-2 discharge port and flows into the evaporator via the expansion valve, and the compressor is operated from the evaporator by the second valve. Refrigerant flows into the natural circulation and steam compression combined cooling system characterized in that the. A compressor for compressing the refrigerant to a high pressure, a condenser for condensing the transferred refrigerant, a receiver for supplying the refrigerant from the condenser and discharging only the liquid refrigerant, and an expansion valve for supplying the refrigerant from the receiver to a low / low pressure state. And, in the natural circulation and steam compression combined cooler comprising a refrigerant supplied with a refrigerant to absorb the surrounding heat and supply the refrigerant to the compressor or condenser, The receiver is in communication with a tank portion in which the liquid refrigerant is stored, an inlet portion for supplying the refrigerant discharged from the condenser to the tank portion, and a pipe having an inlet at a lower side inside the tank portion and positioned above the level of the liquid refrigerant. A first outlet portion and a second outlet portion provided at a bottom surface side of the tank portion to allow a liquid refrigerant to flow out of the tank portion by gravity when opened; The condenser is installed at a position higher than the receiver, the receiver is installed at a position higher than the evaporator, and the inlet of the evaporator is installed at a position lower than the outlet of the evaporator; A directional valve, comprising: a first valve having a first input port connected to a first outlet, a first input port connected to the second outlet, and a first outlet port;  A second valve allowing the refrigerant discharged from the evaporator to flow to either the compressor or the condenser; A third input port installed downstream of the first valve, into which the refrigerant supplied from the receiver flows, a third first discharge port in direct communication with the inlet of the evaporator, and a third second in communication with the expansion valve; A third valve having a discharge port, When operating in a natural circulation type, the first 1-2 input port and the first discharge port communicate with each other, and the refrigerant supplied to the third input port flows directly into the evaporator through the third-1 discharge port, and is operated by the second valve. Allow refrigerant to flow from the evaporator to the condenser; When operated by steam compression, the 1-2 input port is closed and the 1-1 input port and the first discharge port communicate with each other, and the refrigerant supplied to the third input port is discharged through the 3-2 discharge port and expanded. The refrigerant flows from the evaporator to the compressor by the second valve through the valve, and the refrigerant flows from the evaporator to the compressor. 7. The method according to any one of claims 1 to 6, The second valve is installed at the inlet of the compressor and the second valve for allowing or blocking the flow of refrigerant from the evaporator to the inlet of the compressor, and the second to allow or block the refrigerant from flowing directly from the evaporator to the condenser; Combined natural circulation and steam compression type air conditioner, characterized in that consisting of two valves. 7. The method according to any one of claims 1 to 6, The second valve is a direction switching valve comprising a second input port in communication with the evaporator, a 2-1 output port in communication with the inlet of the compressor, and a 2-2 output port in communication with the inlet of the condenser Combined cooling system with natural circulation and steam. delete

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