KR20030019877A - Silencer for air conditioner - Google Patents

Abstract

PURPOSE: To provide a noise suppressor for an air conditioner, which prevents a refrigerating cycle from being badly influenced. CONSTITUTION: The refrigerating cycle is provided with an indoor side heat exchanger, an outdoor side heat exchanger, a four-way valve, and a throttling device 24. The refrigerating cycle is also provided with a filter 22 in which a single metal wire or a non-cut-off stranded wire is compressed, so as to reduce noise generated by the throttling device 24.

Description

Silencer of air conditioner {SILENCER FOR AIR CONDITIONER}

The present invention relates to a silencer of an air conditioner installed in a refrigeration cycle.

In recent years, the reheating dehumidification function generally installed in an air conditioner requires the installation of a decompression device (condenser) in an indoor unit. Low noise is important in the condenser to generate the refrigerant sound and prevent the sound from being directly transmitted to the user living in the room.

The refrigeration cycle has a refrigerant pipe connecting the compressor, the indoor heat exchanger and the outdoor heat exchanger, and a refrigerant flow rate adjusting mechanism. The reheating dehumidification function includes a depressurizer for using a part of the indoor heat exchanger as a condenser and a remaining part as an evaporator in the indoor unit. This function is a function of dehumidification without lowering the extraction temperature.

A refrigeration cycle having a conventional reheat dehumidification function will be described.

5 is a refrigeration cycle diagram of an air conditioner equipped with a reheat dry (DRY) function. The refrigeration cycle includes a compressor 11, a four-way valve 12, an outdoor heat exchanger 13, a pressure reducing device 14, an indoor heat exchanger 15 and 18, a dehumidification valve 16, A condenser 17 is provided. The silencer 19 is provided before and after the condenser 17. The silencer 19 mainly reduces noise generated by the condenser 17, and is provided at least one side of the front and rear of the condenser 17.

Each of them is sequentially connected to form a refrigeration cycle. In the reheat dehumidification operation, the refrigerant flows in the direction of arrow A. At this time, the dehumidification valve 16 is closed and the refrigerant flows toward the condenser 17. At this time, noise is generated in the condenser 17.

For this reason, a dustproof rubber (not shown) which absorbs noise and a muffler-shaped silencer (not shown) are provided to stabilize the state of the refrigerant at the condensation inlet of the condenser 17. Alternatively, noise is absorbed and emitted by rectifying the flow of the refrigerant by subdividing the steam slug through the filter as a porous body or a mesh at the entrance or one of the refrigerant.

However, dust-proof rubbers have insufficient sound absorption. The muffler silencer is difficult to stabilize the state of the refrigerant due to the change of the state of the liquid refrigerant due to the change in the air conditioning condition and the use condition, and requires a large storage space.

It is considered that the noise reduction method by the filter has a great effect, compared with the above two methods also in the point that the influence of a noise is comparatively small by the difference of a driving state. However, in the filter system, it is necessary to basically pass all the refrigerant through the filter. In addition, since a very fine filter is required, the filter may be clogged with dust, and in the worst case, the refrigerant circuit may be blocked. In addition, in order to prevent this, when the filter area is enlarged, a large space is required for storage.

In addition, the filter requires a certain width in order to reduce the noise, and the cost of the double layer filter, etc. becomes large. In addition, cutting powder may be generated due to loosening or breaking of the filter itself, and dust may be generated from the filter itself, thereby blocking the refrigeration cycle. In addition, the density of the filter itself is not uniform and the noise effect is insufficient, or cutting powder is generated at the outlet of the filter, and foreign matter flows into the condenser.

The silencer is provided in a refrigeration cycle having an indoor side heat exchanger, an outdoor side heat exchanger, a condenser, and a refrigerant pipe, and reduces noise generated by the condenser. The silencer is provided with a filter having a thickness in the flow direction of the refrigerant and formed of compressed metal wires.

1 is a cross-sectional view of a silencer in Embodiment 1 of the present invention.

2 is a cross-sectional view of the silencer according to Embodiment 4 of the present invention.

3 is a sectional view of a silencer according to a fifth embodiment of the present invention;

4 is a sectional view of a silencer according to a sixth embodiment of the present invention;

5 is a refrigeration cycle diagram of a conventional air conditioner.

<Explanation of symbols for the main parts of the drawings>

15: indoor heat exchanger

16: dehumidification valve

17: condenser

18: indoor heat exchanger

19: Silencer

21, 31, 41, 51: silencer body

22, 32, 42, 52: filter

23, 33, 43, 53: filter fixture

24, 34, 44, 54: condenser

36, 46, 56: bypass euro

37, 47, 57: bypass hole

(Embodiment 1)

In the embodiment of the present invention, the silencer of the air conditioner is installed in the refrigerant cycle shown in FIG.

1 is a block diagram of a silencer according to Embodiment 1 of the present invention. In FIG. 1, the silencer main body 21 is provided with the filter fixture 23 caulking the filter 22 inside. The filter 22 is formed by compressing iron wire which is a metal wire. The condenser 24 generating noise of the refrigerant is attached to the silencer main body 21 directly or through a lead pipe. Basically, the refrigerant passing through the condenser passes through the filter 22. Moreover, the copper pipe 25 is connected to the opposite side of the condenser 24 of the silencer main body 21. A silencer is provided at least at one side before and after the condenser, and low noise is achieved by stabilizing the state of the refrigerant.

The filter 22 has a thickness in the flow direction of the refrigerant, and is formed by compressing iron wires, so that a silencer having a low noise effect with a compact and low cost is obtained.

(Embodiment 2)

Since the filter in Embodiment 1 compresses and forms the iron wire which is a metal wire, there exists a possibility that cutting powder may generate | occur | produce but cut | disconnects slightly. In Embodiment 2 of this invention, when a metal wire is formed with one iron wire or the twisted wire which is not cut in the middle, it is very hard to disconnect.

(Embodiment 3)

In order to uniformize the density of the filter in the first embodiment and obtain the maximum noise effect in the minimum space, in the third embodiment of the present invention, the iron wire is once processed into a spiral shape, and the condensation (compression) process is performed. The density of the wire mesh is uniformed and a large low noise effect is obtained.

(Embodiment 4)

2 is a cross-sectional view of the silencer according to Embodiment 4 of the present invention. Inside the silencer main body 31, a filter fixture 33 for caulking the filter 32 is inserted. The condenser 34 is attached to one end of the silencer body 31 directly or through a lead pipe. The silencer main body 31 is attached with a copper pipe 35 on the opposite side of the condenser 34. The silencer main body 31 has a bypass hole 37 connected to the bypass flow passage 36 through which the refrigerant flows bypassing the filter 32. This silencer is provided in the mainstream of the refrigerant, and most of the refrigerant passes through the filter 32 inside the silencer. However, foreign matter enters and accumulates in the filter 31 during the refrigeration cycle, and the filter 31 may be blocked. At this time, since the refrigerant flows through the bypass passage bypassing the filter 31 through the bypass hole 37, the operation of the air conditioner can be continued without adversely affecting the refrigeration cycle.

(Embodiment 5)

3 is a cross-sectional view of the silencer according to Embodiment 5 of the present invention. Inside the silencer main body 41, a filter fixture 43 for caulking the filter 42 is inserted. The condenser 44 is attached to one end of the silencer body 41 directly or via a lead pipe. The silencer main body 41 is attached with a copper pipe 45 on the opposite side of the condenser 44. The silencer main body 41 has a bypass hole 47 which is connected to the bypass flow passage 46 through which the refrigerant flows bypassing the filter 42. The bypass flow passage 46 is the silencer main body 41. It is installed separately on the outside. In the bypass flow passage 46, when foreign matter generated in the refrigeration cycle is remarkably deposited on the filter 42 and the filter 42 is blocked, the refrigerant flows, and as a result, the remaining material does not adversely affect the refrigeration cycle. However, when the flow of the coolant is concentrated in the bypass hole 47 in the steady state in which foreign matters and the like are not significantly accumulated in the filter 42, the coolant noise is generated by this.

In this silencer, the flow resistance of the refrigerant flowing through the bypass passage 46 through the bypass hole 47 is set to be larger than the flow resistance of the refrigerant passing through the filter 42 in which foreign matter or the like is not significantly deposited. do. Therefore, while ensuring the flow of the refrigerant, the flow of the refrigerant is usually not concentrated. By this bypass flow passage 46, the silencer can ensure reliability and reduce noise.

(Embodiment 6)

4 is a cross-sectional view of the silencer according to Embodiment 6 of the present invention. Inside the silencer main body 51, a filter fixture 53 for caulking the filter 52 is inserted. The condenser 54 is attached to one end of the silencer body 51 directly or via a lead pipe. The silencer main body 51 is provided with a copper pipe 55 on the opposite side of the condenser 54. The silencer main body 51 is formed with a bypass hole 57 which is connected to the bypass flow passage 56 through which the refrigerant flows bypassing the filter 52. The bypass flow passage 56 is screw-shaped in the groove between the silencer main body 51 and the filter fastener 53, the outer side of the filter fastener 53 or the inner side of the filter fastener 53 of the silencer main body 51. It is formed by parsing. By the bypass flow path 56 having a predetermined flow resistance, the same effects as those of the silencer of the fifth embodiment can be obtained. In addition, the bypass flow path 56 does not need to be separately installed as in the silencer of Fig. 3, and the silencer can be made compact and low in noise.

(Embodiment 7)

In Embodiment 7 of this invention, the flow volume of the bypass flow path 56 in Embodiment 6 is set less with respect to the flow volume of the filter 52. This ensures the flow rate of the refrigerant in the bypass when the filter 52 is blocked, while preventing the refrigerant from flowing into the filter 52 during normal operation, thereby suppressing the generation of noise.

In each of the above embodiments, an iron wire which is advantageous in cost as a metal wire is used for the filter, but other metal wires may be used.

In the refrigerant cycle including the indoor heat exchanger, the outdoor heat exchanger, the four-way valve and the condenser, a silencer having a filter formed by compressing a single metal wire or a twisted wire that is not cut in the middle is provided. Can reduce the noise generated in the reactor, and can adversely affect the refrigeration cycle of foreign matters generated in the refrigeration cycle.

Claims (9)

A silencer which is installed in a refrigeration cycle having an indoor heat exchanger, an outdoor heat exchanger, a condenser, and a refrigerant pipe, reduces noise generated by the condenser. A silencer having a thickness in a flow direction of a coolant and having a filter formed of a compressed metal wire. The silencer of claim 1, wherein the metal wire is one metal wire. The silencer of claim 1, wherein the metal wire is a twisted wire that is not cut along the way. The silencer of claim 1, wherein the metal wire is spiral. The silencer according to claim 1, further comprising a bypass passage for bypassing said refrigerant from said filter. The silencer of claim 5, wherein a flow resistance of the refrigerant flowing through the bypass flow path is greater than a flow resistance of the refrigerant passing through the filter. 6. The silencer according to claim 5, wherein the bypass flow path is threaded. The silencer of claim 5, wherein a flow rate of the refrigerant flowing through the bypass flow path is small relative to a flow rate of the refrigerant flowing through the filter. The silencer of claim 1, wherein the metal wire is an iron wire.