KR100576295B1 - Expansion valve with accumulated thin plate - Google Patents

Abstract

The present invention relates to an expansion valve, and more particularly, to a laminated laminated expansion valve in which a plurality of thin plates are stacked but an expansion passage for throttling a fluid is formed in the thin plates.

To this end, the present invention provides a thin plate-like upstream plate provided with an inlet through which the fluid is introduced, an expansion inlet flowed while the fluid infiltrates with the inlet formed with the inlet, and an expansion outlet through which the expanded fluid flows. It is to provide a laminated laminate expansion valve consisting of an expansion plate and a thin plate-like downstream plate provided with an outlet provided corresponding to the expansion outlet.

Expansion valve, thin plate

Description

Thin Laminated Expansion Valve {EXPANSION VALVE WITH ACCUMULATED THIN PLATE}

1 is a schematic view showing a typical air conditioning refrigeration apparatus.

2 is a schematic view showing a capillary tube according to the prior art.

Figure 3 is a first embodiment showing a thin laminated expansion valve according to the present invention

Figure 4 is a second embodiment showing a thin laminated expansion valve in accordance with the present invention

<Brief description of symbols for the main parts of the drawings>

1: compressor 2: four-way

3: condenser 4: capillary tube

5: evaporator

10: upstream plate 11: inlet

20 fluid expansion plate 21 expansion inlet

22: expansion path 23: expansion exit

30: downstream 31: outlet

The present invention relates to an expansion valve, and more particularly, to a laminated laminated expansion valve in which a plurality of thin plates are stacked but an expansion passage for throttling a fluid is formed in the thin plates.

1 is a schematic view showing a general air conditioning refrigeration cycle, a refrigeration air conditioning cycle is generally applied to a refrigerator or an air conditioner to absorb heat from the outside or release heat to the outside to keep food fresh and to cool and heat the room It also keeps the indoor environment pleasant.

Looking at the cooling cycle of such a general air conditioner, first, the high temperature low pressure gas refrigerant is compressed in the compressor (1) and transferred to the condenser (3) through the four directions (2) in the high temperature and high pressure gas refrigerant at low temperature and high pressure Is converted into a liquid refrigerant. Next, the low temperature and high pressure liquid refrigerant conveyed from the condenser 3 is expanded while passing through the capillary tube 4 and converted into a low temperature and low pressure liquid refrigerant, which is introduced into the evaporator and the low temperature and low pressure liquid refrigerant introduced into the evaporator 5 is The indoor space is cooled by absorbing and evaporating heat.

In the cooling cycle of the air conditioner, the capillary tube 4 is a device for expanding a high pressure refrigerant into a low pressure refrigerant. In general, a capillary tube 4 is applied to an air conditioner.

This conventional capillary tube 4 is shown in FIG. 2. The copper tube is made of the same material and is connected between the pipes of the refrigerant pipe connecting the evaporator 5 and the condenser 3. In addition, such a capillary tube is wound up in a coil shape in consideration of the narrow space in the air conditioner main body, and is thus bundled with a cable tie.

The end of this capillary tube 4 is joined by welding with the end of the refrigerant pipe extending from the evaporator 5 and the condenser 3. Then, around the capillary tube 4 is filled with an insulator for preventing dust and noise, such as a putty.

This conventional capillary tube 4 is as described above. In order to sufficiently throttle the liquid refrigerant, it must be formed to have a sufficient length, which causes severe vibration noise as the refrigerant moves inside the capillary, which causes a problem of cracking in the metallic joint with other members.

Furthermore, since the length of the capillary tube 4 is sufficiently long compared with the space to be installed, it is inevitably wound and installed in multiple times. This causes the diameter of any point of the capillary 5 to be narrower than the other point.

In the assembly and manufacturing process to form a refrigeration cycle, fine foreign matters are generated. These foreign matters are continuously accumulated at the narrowly formed points in the length of the capillary tube 4 while flowing inside the capillary tube. At this point, there is a serious problem of capillary blockage.

The present invention has been made in order to improve such a problem, to prevent various vibrations and noises, and to reduce the size of the vibration and to be freely installed in a narrow space, furthermore, the cross-sectional area of the inner flow path is constant over the entire length The purpose of the present invention is to provide an expansion valve that essentially prevents a phenomenon in which a foreign matter accumulates inside the flow path and is blocked.

As described above, the thin laminated expansion valve according to the present invention will be described with reference to FIG. A plurality of thin laminated liquid expansion plates 20 are provided with an expansion inlet 21 formed to correspond to the inlet 11 and an expansion passage 23 through which fluid flows, and an expansion outlet 22 through which the expanded fluid flows out. )and; A thin plate-like downstream plate 30 having an outlet 31 provided to correspond to the expansion outlet 22; It is done.

3, the fluid expansion plate 20 having a constant thickness is processed to form an expansion passage 23 having a constant width w and a depth d therein. In the process for forming the expansion flow path 23, it is possible to use the etching process, which is widely used in the micromachining field recently, or the general press process.

In particular, by the etching process, an expansion passage having a diameter of 18 mm, a thickness of 1 mm, and a depth of 0.1 mm can be formed inside a fluid expansion plate having a thickness of 0.2 m. When the fluid expansion plate 20 is stacked in plurality as necessary, the desired expansion flow path is easily formed, and the desired pressure reduction is achieved.

Figure 4 is a schematic view showing a fluid expansion plate according to another embodiment of the present invention, and also through the depth of the inside of the fluid expansion plate 20 so as to correspond to the thickness to ensure the depth of the required fluid flow path will be.

Therefore, when the high pressure fluid is to be decompressed with the required low pressure fluid, the required number of flow path expansion plates on which the expansion flow path is formed is laminated in order to reduce the pressure of the high pressure fluid to the required low pressure fluid so as to form a stacked expansion valve.

Generally, in the air-conditioning refrigeration field, a thin plate-type expansion valve in which the shape of the expansion valve used to reduce the high pressure to low pressure is laminated in a plurality of thin plates.

By providing a compact, freely installed in a narrow space, the cross-sectional area of the flow path inside the thin plate is formed to be constant over the entire length of the flow path to provide the advantage of preventing foreign substances from accumulating in the flow path in the past. .

Claims (5)

In the expansion valve, Thin plate upstream plate 10 is provided with an inlet 11 for the fluid flow, A plurality of thin laminated liquid expansion plates 20 are provided with an expansion inlet 21 formed to correspond to the inlet 11 and an expansion passage 23 through which fluid flows, and an expansion outlet 22 through which the expanded fluid flows out. )and, A thin plate-like downstream plate 30 having an outlet 31 provided to correspond to the expansion outlet 22; Laminated laminated expansion valve, characterized in that consisting of. The method of claim 1, Thin-walled expansion valve, characterized in that the flow path of the fluid expansion plate 20 made of a width and depth set in the fluid expansion plate (20). The method of claim 1, The flow path of the fluid expansion plate 20 is a laminated laminated expansion valve, characterized in that the width and thickness set in the fluid expansion plate 20 is completely penetrated. The method according to any one of claims 1 to 3, The thin plate upstream plate (10), the thin plate type liquid expansion plate (20) and the thin plate downstream plate (30) is a laminated laminated expansion valve, characterized in that made of any one of metal, ceramic resin, polymer synthetic resin. The method according to any one of claims 1 to 3, The inlet port 11 of the thin plate-like upstream plate 10, the flow path 23 of the plate-shaped fluid expansion plate 20, and the outlet port 31 of the plate-shaped downstream plate 30 are formed by etching or pressing. Stacked expansion valve.

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