KR20040090130A - Inlet-tube structure of accumulator for simultaneous cooling and heating type multi air conditioner - Google Patents

Abstract

PURPOSE: An accumulator suction pipe structure of a simultaneous cooling and heating multi-air conditioner is provided to improve the efficiency of a cycle by smoothly circulating a refrigerant through a system by reducing flow loss of the refrigerant. CONSTITUTION: A casing(111a) has a containing space inside. First and second suction pipes(111b,111c) pass through an upper part of the casing to flow a refrigerant into the containing space of the casing. A discharge pipe(111d) passes through one sides of the first and second suction pipes for discharging only gaseous refrigerant to a compressor. The first suction pipe is combined with a first recovery pipe(126) for recovering gaseous refrigerant of low pressure discharged to a low-pressure gas pipe of a distributor from an indoor heat exchanger. The second suction pipe is combined with a second recovery pipe(117) for recovering the gaseous refrigerant of low pressure after exchanging heat with an outdoor heat exchanger.

Description

Accumulator suction tube structure of air-conditioning simultaneous multi-air conditioner {INLET-TUBE STRUCTURE OF ACCUMULATOR FOR SIMULTANEOUS COOLING AND HEATING TYPE MULTI AIR CONDITIONER}

The present invention relates to a simultaneous air-conditioning multi-air conditioner, and more particularly, the refrigerant in the low pressure gas state from the outdoor unit side heat exchanger and the indoor unit side heat exchanger during the entire heating operation smoothly without pressure loss along each recovery pipe. It relates to a suction pipe structure of an air conditioner accumulator for simultaneous heating and cooling to be introduced into the air conditioner.

In general, the simultaneous heating and cooling multi air conditioner is composed of one outdoor unit and a plurality of indoor unit, and some of the plurality of indoor unit can be heated and partially cooled.In addition, more than half of indoor units are heated by the operation method. It is divided into "heating main body operation" and "cooling main body operation" in which more than half of indoor units are cooled.

Hereinafter, an accumulator for a conventional air-conditioning simultaneous multi air conditioner will be described with reference to the accompanying drawings.

1 is a schematic diagram showing a heating main operation state of a conventional air-conditioning simultaneous multi air conditioner system, and FIG. 2 is a schematic view showing an accumulator for a conventional air-conditioning simultaneous multi air conditioner.

As shown in FIG. 1, the conventional air-conditioning simultaneous multi air conditioner is installed on the outdoor side, and the outdoor unit 10 for compressing and circulating the refrigerant, and a plurality of each installed on the indoor-side compartment space to be cooled and heated. Distributors for supplying or recovering the supplied refrigerant to the indoor unit 31 and the indoor unit unit 31 and the refrigerant supplied from the outdoor unit 10 in a state necessary for cooling and heating the respective compartments ( 20).

The outdoor unit 10 includes a compressor 12 for compressing a refrigerant, a four-way valve 14 disposed at the discharge side of the compressor 12 to switch the flow path to a heating main operation and a cooling main operation state, and a compressor 12. Is provided on one side of the outdoor unit side heat exchanger (13), the outdoor unit side heat exchanger (13), an expansion valve (16) for decompressively expanding the refrigerant, and one side of the compressor (12). The accumulator 11 is configured to allow the refrigerant in the gaseous state to be sucked into the compressor.

The indoor unit 31 includes an indoor unit heat exchanger 32 and an expansion valve 33 provided at one side of the indoor unit side heat exchanger 32 to expand and expand the refrigerant introduced from the outdoor unit under reduced pressure.

The distributor 20 includes a high pressure engine 21 for supplying a refrigerant of a high pressure gas state compressed by the compressor 12 to the indoor unit side heat exchanger 32, an indoor unit side heat exchanger 31, and an outdoor unit side heat exchanger ( A high pressure liquid pipe 22 for supplying and recovering a refrigerant in a high pressure liquid state by connecting a 13), a low pressure engine 23 for recovering a refrigerant gas in a low pressure gas state from the indoor unit side heat exchanger 32, and the high pressure. Each of the on and off valves 24 and 25 for opening and closing the engine 21 and the low pressure engine 23.

As shown in FIG. 2, the accumulator 11 includes a casing 11a having an accommodating space therein, a suction pipe 11b through which the refrigerant flows through the upper side of the casing 11a, and a refrigerant among the refrigerants. The discharge pipe 18 for discharging only the gas to the compressor 12 is composed of an outlet pipe 11b in communication with each other.

The suction pipe (11b) includes a first recovery pipe for recovering the refrigerant in the low pressure gas state flowed out from the indoor unit side heat exchanger (13) of the indoor unit (31) to be cooled during the operation of the heating main body to the low pressure engine of the distributor; After exchanging heat in the outdoor unit side heat exchanger 13 from the indoor unit side heat exchanger 32 of the indoor unit unit 31 that is heated and heated through the expansion valve 16, the refrigerant in a low pressure gas state is recovered through the four-way valve 14. The second recovery pipe 17 is coupled to the first recovery pipe 26 to the letter "T", and then the recovery union pipe is connected to the suction pipe of the accumulator.

By such a configuration, the conventional air-conditioning simultaneous multi air conditioner is an indoor unit installed in each indoor space where refrigerant of a high-pressure gas state compressed in the compressor 12 is to be heated along the high-pressure engine of the distributor 20 during operation of the heating main body. The refrigerant in the high pressure gas state, which is distributed to the 31 and introduced into the indoor unit 31, is heated by heat exchange with the indoor unit 30 in the indoor unit side heat exchanger 32.

On the other hand, the refrigerant in the high pressure liquid state condensed after heat exchange with the indoor unit in the indoor unit heat exchanger (32) is recovered toward the outdoor unit side heat exchanger (13) along the high pressure liquid pipe, the indoor unit unit of the indoor space to be partially cooled ( 31) and the heat exchange with the indoor unit, the refrigerant in the low pressure gas state is discharged to the low pressure engine (23).

Then, the first recovery pipe 26 for recovering the refrigerant in the low pressure gas state along the low pressure engine 23 to the accumulator 11 and the refrigerant in the low pressure gas state after heat exchange in the outdoor unit side heat exchanger 13. The recovery combining pipe, in which the second recovery pipe 17 for recovering the to the accumulator 11 through the four-way valve 14, is formed in the shape of a “T”, is connected to the suction pipe 11b of the accumulator 11. Therefore, the discharge pipe 18 coupled to the discharge pipe 11c is separated from the refrigerant in the partial liquid state among the refrigerants in the low pressure gas state recovered into the casing 11a of the accumulator 11 having the predetermined accommodation space. Through the suction through the compressor 12 to achieve a cycle.

However, since the accumulator 11 is configured to have one suction pipe 11b for recovering the refrigerant into the casing, the first and second recovery pipes 26 and 17 are formed in a T-shape with a large pressure loss. After connection, the recovery combining pipe should be communicatively coupled to the suction pipe 11b, so that the refrigerant in a low pressure gas state having a large flow rate is smoothly inside the casing 11a of the accumulator 11 due to the pressure loss generated in the coupling pipe part. There is a problem that does not flow into.

According to the present invention devised to solve the above problems, the accumulator suction pipe structure of the simultaneous heating and cooling type multi air conditioner to reduce the flow loss when the refrigerant flows into the casing of the accumulator along each recovery pipe to achieve a smooth inflow of the refrigerant The purpose is to provide.

1 is a schematic diagram showing a conventional air-conditioning simultaneous multi air conditioner system,

2 is a perspective view showing an accumulator for a conventional air-conditioning simultaneous multi air conditioner;

Figure 3 is a schematic diagram showing a heating and cooling simultaneous multi air conditioning system of the present invention,

4 is a perspective view showing an accumulator for simultaneous heating and cooling of a multi-type air conditioner according to the present invention;

* Description of the main parts of the drawings *

111: accumulator 111a: casing

111b: first suction tube 111d: discharge tube

111c: second suction pipe 112: compressor

113: outdoor unit side heat exchanger 114: four-way valve

117: second recovery piping 118: discharge piping

120: distributor 121: high pressure engine

122: high pressure fluid pipe 123: low pressure pipe

126: first recovery piping 132: indoor unit heat exchanger

In order to achieve the above object, the present invention is one in which at least two recovery pipes for recovering a low-pressure gas refrigerant from the outdoor unit side heat exchanger and some indoor unit side heat exchangers during the operation of the heating main body are combined and then the recovery combined pipes are connected in communication. In the accumulator suction pipe structure of a cooling / heating simultaneous multi-air conditioner, the suction pipe of which penetrates an upper side of a casing having an inner accommodating space, the accumulator includes a plurality of suction pipes for communicating the recovery pipes with each other. Type is achieved by the suction pipe structure of the accumulator of multi air conditioner.

Here, the suction pipe is preferably provided with two suction pipes in which the first recovery pipe is in communication with the outdoor unit side heat exchanger and the second recovery pipe is in communication with the indoor unit side heat exchanger.

EMBODIMENT OF THE INVENTION Hereinafter, the accumulator suction pipe structure of the air-conditioning simultaneous multi-air conditioner of this invention is demonstrated according to attached drawing.

3 is a schematic diagram showing a heating main operation state of the air-conditioning simultaneous multi-air conditioner system of the present invention, and FIG. 4 is a perspective view showing the accumulator for the air-conditioning simultaneous multi-air conditioner of the present invention.

As shown in Figure 3, the air-conditioning simultaneous multi air conditioner of the present invention is installed on the outdoor side, and the outdoor unit unit 110 to compress and circulate the refrigerant, and is installed on the indoor side room space to be cooled and heated, respectively A plurality of indoor unit 131 and a distributor for distributing or supplying the refrigerant supplied from the outdoor unit 110 to the indoor unit 131 in a state necessary for cooling and heating of each compartment, or for recovering the supplied refrigerant. It consists of 120.

The outdoor unit 110 includes a compressor 112 for compressing a refrigerant, a four-way valve 114 disposed at the discharge side of the compressor 112 to switch the flow path to a heating main operation and a cooling main operation state, and one side of the compressor. And an expansion valve 116 provided at one side of the outdoor unit side heat exchanger 113 and an outdoor side heat exchanger 13 to expand and expand the refrigerant under reduced pressure, and provided at one side of the expansion valve to bypass the refrigerant. The accumulator 111 is provided at one side of the open valve 115 and the compressor 112 so that the refrigerant in the gas state can be sucked into the compressor 112.

The indoor unit 131 is provided on one side of the indoor unit heat exchanger 132 and the indoor unit heat exchanger 132, and an expansion valve for depressurizing and expanding the high pressure liquid refrigerant introduced from the outdoor unit side heat exchanger 113. It consists of 133.

The distributor 120 includes a high-pressure engine 121 for supplying a refrigerant of a high-pressure gas state compressed by the compressor 112 to the indoor unit side heat exchanger 132, and an indoor unit side heat exchanger from the outdoor unit side heat exchanger 113. 132, a high pressure liquid tube 122 for supplying and recovering a refrigerant in a high pressure liquid state, a low pressure engine 123 for recovering a refrigerant gas in a low pressure gas state from the indoor unit side heat exchanger 132, and the high pressure engine ( 121 and the open / close valves 124 and 125 for opening and closing the high pressure liquid tube 122.

As shown in FIG. 4, the accumulator 111 includes a casing 111a having an accommodating space therein and first and second suction pipes passing through an upper side thereof so that refrigerant flows into the inner accommodating space of the casing 111a. A discharge tube discharging only the gaseous refrigerant separated through the one side of the first and second suction pipes 111b and 111c and separated from the inside of the casing 111a to the compressor 112. 111d).

In addition, although not shown in the drawing, the discharge pipe 111d penetrates the lower part of the casing and protrudes to a predetermined height inside the casing, and a screen assembly is hypothesized between the inlet pipe and the discharge pipe so that the first and second suction pipes ( Some liquid refrigerant introduced along 111b) and 111c may be prevented from directly flowing into the discharge pipe.

The first suction pipe (111b) is a first recovery pipe for recovering to recover the low-pressure gas refrigerant flowing out from the indoor unit side heat exchanger 113 to the low pressure engine 123 of the distributor 120 during the heating main operation ( 126 is communicatively coupled, and the second suction pipe 111c has a second recovery pipe 117 for recovering the low pressure gas refrigerant along the four-way valve 114 after being heat-exchanged from the outdoor heat exchanger 113. Ensure communication is in place.

The first suction pipe and the second suction pipe are preferably arranged on different axes to prevent the liquid refrigerant introduced therethrough from directly flowing into the suction port of one end of the discharge pipe bent upwardly in the casing.

By such a configuration, each indoor unit of the indoor space to which the high-pressure refrigerant gas compressed by the compressor 112 is heated along the high-pressure engine of the distributor 120 during the heating main operation of the air-conditioning simultaneous multi-air conditioner of the present invention. 131, the refrigerant in the high pressure gas state introduced into the indoor unit 131 is heated by heat exchange with the indoor unit in the indoor unit side heat exchanger 132, and the refrigerant in the high pressure liquid state after the heat exchange is connected to the high pressure liquid pipe 22. Accordingly, most of them are recovered to the outdoor unit side heat exchanger 113, and some of them are introduced into the indoor unit unit 131 of the indoor space to be cooled, and after heat exchange with the indoor unit through the indoor unit side heat exchanger 132, the refrigerant in the low pressure gas state is low pressure. It is recovered along the engine 123.

The refrigerant in the low pressure gas state of the low pressure engine 123 is recovered into the casing 111a of the accumulator 111 through the first recovery pipe 126 and the first suction pipe 111b connected thereto, and the outdoor unit side The refrigerant in the low pressure gas state recovered through the four-way valve 114 after heat exchange in the heat exchanger 113 is casing of the accumulator 111 through the second suction pipe 111c connected to the second recovery pipe 117. 111b) is recovered inside, and the recovered refrigerant gas separates some of the liquid refrigerant from the low pressure gas state, and then flows into the compressor through the discharge pipe 118 connected to the discharge pipe 111d. To achieve.

Therefore, as the first recovery pipe 126 and the second recovery pipe 117 are communicatively coupled to each of the first suction pipe 111b and the second suction pipe 111c corresponding thereto, the low temperature gas state is recovered by the accumulator through this. Refrigerant of the inlet flows smoothly into the accumulator case without the loss of flow.

As described above, according to the present invention, as the refrigerant in the low pressure gas state is recovered by the accumulator along the recovery pipe connected to each suction pipe, the flow loss of the refrigerant is reduced, thereby allowing the refrigerant to circulate smoothly inside the system. Has the effect of improving.

Claims (2)

At least two recovery pipes for recovering the low-pressure gas refrigerant from the outdoor unit heat exchanger and some indoor unit heat exchangers during the operation of the heating main body are joined together so that one suction pipe connected therethrough passes through the casing having the inner receiving space. In the accumulator suction pipe structure of the cooling and heating simultaneous type air conditioner formed, The accumulator has an accumulator suction pipe structure of a simultaneous heating and cooling type multi-air conditioner, characterized in that a plurality of suction pipes are provided for communicating the recovery pipes. The method of claim 1, The suction pipe has two first and second suction pipes for communicating and coupling the first recovery pipe connected to the indoor unit side heat exchanger and the second recovery pipe connected to the outdoor unit side heat exchanger, respectively. Accumulator intake pipe structure of simultaneous air conditioner.