KR100441058B1 - Two-way direction expansion valve with accumulated thin plate - Google Patents

Abstract

PURPOSE: A bidirectional thin plate-layered expansion valve is provided to prevent vibration and noise, to enable free installation in a limited space by reducing the size, and to prevent a passage from being stopped up by foreign materials accumulating in the passage. CONSTITUTION: A bidirectional thin plate-layered expansion valve comprises a thin plate-type upper stream plate(10) having an inlet(11) for inflow of a fluid; plural thin plate-type fluid expansion plates(20) each having an expansion inlet(21) formed correspondently to the inlet, an expansion passage(23) in which the fluid flows while throttling, and an expansion outlet(22) for outflow of the fluid; and a thin plate-type downstream plate(40) having an outlet(41) formed correspondently to the expansion outlet. A check valve(30) having a check plate(32) and a check inlet(31) is arranged between the thin plate-type fluid expansion plates.

Description

TWO-WAY DIRECTION EXPANSION VALVE WITH ACCUMULATED THIN PLATE}

The present invention relates to an expansion valve, and more particularly, to a two-way thin laminated expansion valve including a check valve provided to stack a plurality of thin plates, and an expansion flow path for throttling a fluid in the thin plate and a fluid flow to be bidirectional. .

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 and heating cycle of such a general air conditioner, one side of the four-way valve (2) is coupled to the outlet side of the compressor (1), the heat exchanger (3) for condensation is connected to the other side of the four-way valve (2) , An expansion valve commonly referred to as a capillary tube (4) is connected to the heat exchanger (3) for condensation, and an evaporation heat exchanger (5) is connected to an outlet side of the capillary tube (4), and the evaporation heat exchanger (5) Is coupled to the other side of the four-way valve (2) is introduced into the compressor (1).

Referring to the principle of operation, the high temperature low pressure gas refrigerant is compressed in the compressor (1) and is transferred to the heat exchanger for condensation (3) through the four-way valve (2) and the high temperature and high pressure in the condensation heat exchanger (3) The gas refrigerant is converted into a liquid refrigerant of low temperature and high pressure. Next, the low temperature and high pressure liquid refrigerant conveyed from the condensation heat exchanger 3 is expanded while passing through the capillary tube 4 to be converted into a low temperature low pressure liquid refrigerant to enter the heat exchanger 5 for evaporation, and the heat exchanger for evaporation ( 5) The low temperature low pressure liquid refrigerant absorbs the surrounding heat and evaporates to cool the indoor space.

In the air-conditioning cycle of the air conditioner, the expansion valve 4 is a device for expanding a high pressure refrigerant into a low pressure refrigerant, and in general, a capillary tube 4 is applied to the 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 between the evaporation heat exchanger 5 and the condensation heat exchanger 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 the capillary tube 4 is joined by welding with the end of the refrigerant pipe extending from the evaporating heat exchanger 4 and the condensation heat exchanger 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.

In addition, 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.

Furthermore, existing capillary tubes have a diameter and length set, so that a corresponding decompression is determined, where two or more different capillaries are attached to flow the fluid into the required capillaries if more or less pressure is needed. It is true.

In this case, a check valve must be installed in each capillary tube, which causes a complicated pipe configuration and increases the cost of forming a system.

The present invention has been made to improve such a problem, it is provided to enable a bi-directional flow by mounting a very simple check valve of a thin plate shape, it is formed so that the decompression value is different according to each flow direction. This is to provide a very simple and useful expansion valve when the amount of decompression required for cooling and cooling is different in a cooling and heating system that combines cooling and heating.

In addition, as compared with the conventional capillary tube, it is possible to prevent various vibrations and noises, and to reduce the size thereof so that it can be installed freely in a narrow space. It is an object of the present invention to provide an expansion valve which essentially accumulates inside the flow path to prevent the flow path from clogging, and further provides a check valve configured to flow the fluid flow in both directions.

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 two-way thin laminated expansion valve according to the present invention.

Figure 4 is a second embodiment showing a two-way thin laminated expansion valve according to the present invention.

Figure 5 is a third embodiment showing a two-way thin laminated expansion valve according to the present invention.

Figure 6 is a fourth embodiment showing a two-way thin laminated expansion valve according to the present invention.

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

1: compressor 2: four-way valve

3: heat exchanger for condensation 4: capillary tube

5: heat exchanger for evaporation

10: upstream plate 11: inlet

20 fluid expansion plate 21 expansion inlet

22: expansion path 23: expansion exit

30: check valve 31: check inlet

32: checkerboard

40: downstream plate 41: outlet

Hereinafter, a bidirectional thin laminated expansion valve according to the present invention will be described in detail with reference to the accompanying drawings.

3 is a first embodiment showing a bi-directional thin laminated expansion valve according to the present invention,

A thin plate upstream plate 10 having an inlet 11 through which fluid is introduced; A plurality of thin plate-shaped fluid expansion plate 20 having 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; The check valve 32 and the check inlet 31 is provided between the plurality of thin plate-shaped fluid expansion plate and the thin plate-shaped downstream plate 40 is provided with an outlet 41 corresponding to the expansion outlet 22 ( 30).

To explain the operation principle in detail, the fluid introduced from the inlet 11, the check plate 32 formed in the check valve 30 is formed to be closed in the flow direction, the expansion passage of the fluid expansion plate 20 It does not flow to 23, and flows out through the check inlet 31.

Since a plurality of fluid expansion plates 20 are provided downstream of the check valve 30, the fluid flowing out through the check inlet 31 flows through the expansion passage 23 of the fluid expansion plate 20. It is throttled and flows out through the outlet 41 of the downstream plate 40 to reduce the pressure to the required pressure.

Figure 4 is a second embodiment showing a two-way thin laminated expansion valve according to the present invention,

In the configuration according to the first embodiment, since the fluid flow direction is formed in reverse,

The check plate 32 provided in the check valve 30 is made to be open to the fluid flow direction.

Referring to the operation principle, the fluid flowing from the inlet 11 is first throttled while flowing through the expansion passage 23, the check plate 32 formed in the check valve 30 is opened in the flow direction Since the fluid is formed so that the fluid flows into both the check plate 32 and the check inlet 31.

Since a plurality of fluid expansion plates 20 are provided on the downstream side of the check valve 30, the fluid flowing out through the check plate 32 and the check inlet 31 is expanded through the expansion path of the fluid expansion plate 20 ( 23 is throttled continuously while flowing through, and is discharged through the outlet 41 of the downstream plate (40).

The check valve of the first embodiment is formed to be closed in the flow direction, and the check valve of the second embodiment is formed to open in the flow direction. This is to provide a bidirectional expansion valve useful in the case where the amount of fluid is throttled differently is required in the cooling and heating system is required to be different in the decompression value required for cooling and heating.

5 is a third embodiment showing a bi-directional thin laminated expansion valve according to the present invention, Figure 6 is a fourth embodiment showing a bi-directional laminated laminated expansion valve according to the present invention,

A thin plate upstream plate 10 having an inlet 11 through which fluid is introduced; A plurality of thin plate-shaped fluid expansion plate 20 having 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;

It consists of a thin plate-like downstream plate 40 is provided with an outlet 41 provided to correspond to the expansion outlet 22 made of a check plate (31, 32) provided to be opened in different directions between the plurality of thin plate-like fluid expansion plate It relates to the check valve (30).

Referring to the operating principle of the third embodiment, the fluid introduced from the inlet 11 is the check plate 32 formed in the check valve 30 is formed to be closed in the flow direction, the fluid expansion plate 20 It does not flow to the expansion flow path 23 of the), and will flow out through the check inlet (31).

Since a plurality of fluid expansion plates 20 are provided downstream of the check valve 30, the fluid flowing out through the check inlet 31 flows through the expansion passage 23 of the fluid expansion plate 20. It is throttled and flows out through the outlet 41 of the downstream plate 40 to be decompressed to the required pressure.

Figure 6 is a fourth embodiment showing a bi-directional thin laminated expansion valve according to the present invention, the configuration is the same on the basis of the third embodiment, it is made of only the reverse direction of the fluid flow direction. The check plate 32 provided in the check valve 30 of the fourth embodiment is provided to be open with respect to the fluid flow direction.

To explain the operation principle in detail, the fluid flowing from the inlet 11 is formed to the check plate 32 formed in the check valve 30 is open to the flow direction, the other check plate 31 is the flow direction It is formed to be closed against.

As a result, the fluid flowing through the inlet 11 does not flow into the closed check plate 31, but the fluid flows only into the open check plate 32, so that the expansion passage 23 of the fluid expansion plate 20 is provided. It will not flow to, and will flow out through the open check plate (32).

Since a plurality of fluid expansion plates 20 are provided downstream of the check valve 30, the fluid flowing out through the check plate 32 flows through the expansion flow path 23 of the fluid expansion plate 20. It is throttled and flows out through the outlet 41 of the downstream plate 40 to be decompressed to the required pressure.

As a result, the fluid in the expansion valve according to the third and fourth embodiments is formed to have different throttled values, so that the two-way expansion valve is useful when the air-conditioning system is required to have different decompression values during cooling and heating. To provide.

The fluid expansion plate 20 having a constant thickness is processed to form an expansion passage 23 having a constant width w and 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 plurality of such fluid expansion plate 20 is laminated as necessary, it is easy to form the desired length of the expansion flow path to perform the necessary pressure reduction.

Another embodiment of the fluid expansion plate is to fully penetrate the inside of the fluid expansion plate 20 to sufficiently secure the depth of the required fluid flow path.

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

In general, in the air-conditioning refrigeration field, the laminated valve expansion valve in which the expansion valve is used in the form of a plurality of thin plates is used to reduce the high pressure to low pressure.

Provided, but providing a two-way expansion valve of a simple structure by providing a thin check valve in the interior, In addition, the two-way expansion valve of the present invention can be freely installed by miniaturizing in a narrow space, the flow path cross-sectional area inside the thin plate It is formed to be constant over the entire length of the flow path to provide an advantage of preventing a phenomenon in which the flow path is blocked by accumulating foreign matter inside the flow path.

Claims (6)

In the expansion valve, A thin plate upstream plate 10 having an inlet 11 through which fluid is introduced; A plurality of thin plate-shaped fluid expansion plate 20 having 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 check valve provided with a thin plate-shaped downstream plate 40 provided with an outlet 41 corresponding to the expansion outlet 22 and allowing flow only in one direction with the check inlet 31 between the plurality of plate-shaped fluid expansion plates. Bidirectional laminated expansion valve, characterized in that consisting of (30). In the expansion valve, A thin plate upstream plate 10 having an inlet 11 through which fluid is introduced; A plurality of thin plate-shaped fluid expansion plate 20 having 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; Check plate (31, 32) is provided to be made of a thin plate-like downstream plate 40 is provided with an outlet (41) provided to correspond to the expansion outlet 22 to open in a different direction between the plurality of thin plate-like fluid expansion plate Two-way thin laminated expansion valve, characterized in that consisting of a valve (30). The method according to claim 1 or 2, The flow path of the fluid expansion plate 20 is provided with a constant width in the fluid expansion plate 20, bidirectional thin laminated expansion valve, characterized in that made of a constant depth with respect to the thickness of the fluid expansion plate (20). The method according to claim 1 or 2, The flow path of the fluid expansion plate 20 is provided with a constant width in the fluid expansion plate (20), bi-directional thin laminated expansion valve, characterized in that made through the totally through the thickness of the fluid expansion plate (20). The method according to claim 1 or 2, The upstream plate (10), the fluid expansion plate (20), the check valve (30) and the downstream plate (40) is a two-way thin laminated expansion valve characterized in that any one of a metal, ceramic resin, polymer synthetic resin. The method according to claim 1 or 2, Shapes provided in the upstream plate (10), fluid expansion plate (20), check valve (30) and downstream plate (40) is made of a bidirectional thin laminated expansion valve, characterized in that made of etching or pressing.