KR101385029B1 - A Condenser - Google Patents

Abstract

The present invention relates to a condenser, and an object of the present invention is to provide a condenser having a pressure-sensitive first receiver that can ensure that the refrigerant is completely liquid at the outlet of the condenser.

The condenser of the present invention comprises a pair of parallel header tanks (2, 3); Tubes 4 arranged between the header tanks 2 and 3; A heat dissipation fin interposed between the tubes (4); It is provided in the header tank (2, 3), the inlet (5) for the refrigerant flows in and the outlet (6) for discharging the refrigerant; A baffle provided inside the header tanks 2 and 3 to partition an inner space of the header tanks 2 and 3; In the condenser (1) comprising a, a pressure reducing section (D2) region in which the pressure reducing means 8 is provided in the condenser (1) is formed, between the inlet (5) and the pressure reducing means (8) The region forms a condensation portion D1 and the region between the decompression means 8 and the outlet 6 forms a region of recondensation D3 and downstream of the outlet 6 the first receiver 7. ) Is characterized in that it is provided.

Condenser, first receiver, second receiver, pressure reducing means, pressure reducing orifice, pressure reducing tube, liquid, guarantee

Description

Condenser {A Condenser}

1 is a perspective view of a conventional general condenser.

2 is a refrigerant flow and P-h diagram in a condenser according to the prior art.

3 shows a refrigerant flow in two embodiments of a condenser according to the prior art.

4 is a refrigerant flow and P-h diagram in the condenser according to an embodiment of the present invention.

5 is a refrigerant flow and P-h diagram in the condenser according to another embodiment of the present invention.

6 is a graph comparing the performance of the present invention and the conventional condenser.

DESCRIPTION OF REFERENCE NUMERALS

1: condenser 2, 3: header tank

4: tube 5: inlet

6: outlet 7: first receiver

8: decompression means 8a: decompression orifice

8b: Decompression Pass 9: Second Receiver

D1: condensation unit D2: decompression unit

D3: recondensation

The present invention relates to a condenser, and more particularly to a condenser having a reduced pressure accumulator (accumulator).

A heat exchanger is a device that absorbs heat from one side and releases heat to the other between two environments with a difference in temperature. In this case it will act as a heating system. Basically, the heat exchanger consists of an evaporator that absorbs heat from the surroundings, a compressor that compresses the refrigerant (refrigerant), a condenser that releases heat to the surroundings, and an expansion valve that expands the refrigerant (refrigerant). In the cooling apparatus, the actual cooling action is caused by the evaporator in which the liquid refrigerant absorbs the heat amount equivalent to the evaporation heat in the surroundings and is vaporized. The gaseous refrigerant flowing from the evaporator into the compressor is compressed at a high temperature and high pressure in the compressor, and liquefied heat is released to the surroundings in the process of liquefying the compressed gaseous refrigerant through the condenser, and the liquefied refrigerant is again By passing through the turbine (or expansion valve) to become a low-temperature and low-pressure wetted vapor state, it is introduced into the evaporator and vaporized again to form a cycle.

As described above, in the condenser, a refrigerant having a high temperature and high pressure gas flows in and condenses into a liquid state while releasing liquefied heat by heat exchange. Thus, the refrigerant is in a process of changing from a gaseous phase to a liquid phase. The refrigerant and the liquid refrigerant are mixed. However, when the gaseous refrigerant and the liquid phase refrigerant are mixed, only equilibrium conditions can be obtained in temperature and pressure. Therefore, in order to increase the condenser efficiency, it is desirable to separate the liquid phase refrigerant that has already been condensed and the gaseous phase refrigerant that has not yet condensed. Do. Accordingly, in order to separate the gaseous refrigerant and the liquid refrigerant, an accumulator having various structures for gas-liquid separation of the liquid refrigerant has been provided in the condenser.

1 shows a conventional general condenser. In general, the condenser 1 comprises a pair of parallel header tanks 2, 3; Tubes 4 arranged between the header tanks 2 and 3; A heat dissipation fin (not shown) interposed between the tubes (4); It is provided in the header tank (2, 3), the inlet (5) for the refrigerant flows in and the outlet (6) for discharging the refrigerant; A baffle (not shown) provided inside the header tanks 2 and 3 to partition an inner space of the header tanks 2 and 3; It is provided on one side of the header tank (2, 3) and comprises a receiver (7 ') for separating the gaseous refrigerant and the liquid refrigerant. Although the inlet 5 and the outlet 6 are shown in FIG. 1 as being provided only in one header tank 2, according to the flow path design of the system to which the condenser 1 is applied or to the design of the condenser 1 itself. Therefore, one header tank 2 and the other header tank 3 may be provided separately. As described above, the receiver 7 'is provided to collect the two-phase refrigerant in the gas phase and the liquid phase and separate the gas phase and the liquid phase, and to re-condense the refrigerant in the gas phase to increase the performance of the condenser 1. The connection portion of the group 7 'and the header tank 3 and thus the location of the baffle may be changed according to the design of the condenser 1.

Japanese Patent Publication No. 2001-133077 (hereinafter Prior Art 1), Japanese Patent Publication No. 2001-227843 (hereinafter Prior Art 2), Japanese Patent Publication No. 2001-227844 (hereinafter Prior Art 3) and Japanese Patent Publication No. 2004 -003862 (hereinafter referred to as prior art 4) maximizes the heat exchange performance of the condenser by eliminating the single-phase (liquid) region through depressurization, thereby improving the efficiency of the overall cooling system. FIG. 2 shows the refrigerant flow and pressure (P) -enthalpy (h) diagrams in the condenser according to the prior art 3. A pressure reducing passage (pass) is provided in the region P3 shown in FIG. 2 (A), and the partially vaporized refrigerant is introduced into the secondary condensation unit, that is, the region P4, through the receiver drier, and the refrigerant in the region It is configured to be recondensed (ie decompression occurs at the back of the receiver drier). By such a configuration, it is possible to increase the heat dissipation without raising the condensation pressure, thereby obtaining an excellent freezing effect.

In addition, Japanese Patent Laid-Open Publication No. 2003-513836 (hereinafter, referred to as Prior Art 5) passes through the accumulator after the refrigerant passing through the condenser is depressurized, so that the low temperature two-phase refrigerant is separated into the liquid phase through the decompression to contribute to the performance improvement. Doing. 3 shows a refrigerant flow in a condenser according to two embodiments of the prior art 5. In both embodiments, the pressure reducing means are provided at portions marked S in FIGS. 3A and 3B, respectively, and are configured to lower the pressure of the refrigerant before it enters the receiver dryer as shown. .

However, according to the prior arts, it is not possible to guarantee that the refrigerant is supercooled and changed into a liquid state after depressurization. Further, under certain conditions, it is possible to ensure that the refrigerant at the outlet of the condenser is in the liquid phase, but it is highly likely that the refrigerant properties at the outlet of the condenser will not be in the liquid phase due to outside air and other variables. In particular, since the actual conditions vary greatly in the actual vehicle, the technology that can operate only under certain conditions, such as the prior art, there is a problem that the applicability in a variable environment in the actual vehicle is very poor. In addition, when the refrigerant in a state where two phases are mixed and flows into the front end of the thermostatic expansion valve (TXV) does not become completely liquid, the control of the expansion valve becomes unstable and the hunting (the overall pressure of the system does not become normal). As a result, a certain cycle occurs and the likelihood of deterioration of performance and difficulty in obtaining stable performance is very high.

Accordingly, the present invention has been made to solve the problems of the prior art as described above, an object of the present invention is to provide a condenser that can ensure that the refrigerant is completely liquid before the inlet of the expansion valve.

Condenser of the present invention for achieving the above object, a pair of parallel header tank (2, 3); Tubes 4 arranged between the header tanks 2 and 3; A heat dissipation fin interposed between the tubes (4); It is provided in the header tank (2, 3), the inlet (5) for the refrigerant flows in and the outlet (6) for discharging the refrigerant; A baffle provided inside the header tanks 2 and 3 to partition an inner space of the header tanks 2 and 3; In the condenser (1) comprising a pressure reducing unit (D2) region is provided in the condenser 1 is provided with a pressure reducing means 8 in the form of a pressure reducing orifice (8a), the inlet (5) and The area between the decompression means 8 forms a condensation section D1 and the area between the decompression means 8 and the outlet port 6 forms a recondensing section D3, and the outlet 6 Downstream, a first receiver 7 is provided so that a refrigerant passes sequentially through the pressure reducing unit D2-the recondensing unit D3 in the form of the condensing unit D1-a pressure reducing orifice 8a. Discharged from (1), characterized in that the discharged refrigerant is passed through the first receiver 7 is discharged in the form of a liquid refrigerant.

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Hereinafter, a condenser according to the present invention having the configuration as described above will be described in detail with reference to the accompanying drawings.

4 illustrates a refrigerant flow and P-h diagram in a condenser according to one embodiment of the present invention. As shown in Figure 4 (A), the condenser 1 according to the present invention is provided with a decompression path (8a) therein, the first receiver 7 is provided in the discharge port (6). The gaseous refrigerant flowing into the inlet 5 is first condensed in the region between the inlet 5 and the region upstream of the decompression passage 8a, and the region is referred to as condensing unit D1. The refrigerant passing through the condensation unit D1 flows into the decompression orifice 8a and is decompressed while passing through the decompression orifice 8a. The region is called a decompression unit D2. The refrigerant condenses again in the region between the downstream of the reduced pressure orifice 8a and the outlet 6, which is referred to as a recondensing portion D3. The refrigerant that has passed through the recondensation unit (D3) is introduced into the first receiver (7) through the outlet (6), and collects only the liquid refrigerant from the first receiver (7) to discharge to enter the expansion valve do. In this case, the first receiver 7 may be equipped with a desiccant therein, whereby it is possible to absorb the moisture in the refrigerant to improve the cooling performance.

4 (B) shows the P-h diagram of the condenser according to the present invention. The condenser of the present invention shown in FIG. 4 (A) operates over the area enclosed by the dotted lines in FIG. 4 (B). As can be seen from the pH diagram, in the condenser according to the present invention, the refrigerant passing through the condensation unit (D1) region is first decompressed while passing through the decompression unit (D2) region, and then the recondensation is passed through the recondensing unit (D3) region. After it has occurred, it is introduced back into the first receiver 7 region, thereby ensuring that the refrigerant discharged under any conditions becomes completely liquid and flows into the expansion valve.

5 illustrates a refrigerant flow and P-h diagram in a condenser according to another embodiment of the present invention. As shown in FIG. 5A, in this embodiment, the second receiver 9 is further provided before the decompression unit D2 in the embodiment as shown in FIG. 4. Of course, the second receiver 9 may also be equipped with a desiccant therein, thereby absorbing moisture in the refrigerant to further improve the cooling performance. In this embodiment, as shown in Figure 5 (A) is provided with a decompression path (8b) in the outlet portion of the second receiver (9) is a decompression is made, of course in the embodiment of Figure 5 As a means, the pressure reducing orifice 8a shown in the embodiment of FIG. 4 may be used. The decompression path 8b can be formed by using a tube having a smaller cross-sectional area than the tube of another region, and the number of tubes used as the decompression path 8b is preferably about 1 to 3 pieces. The decompression orifice 8a and the decompression orifice 8b are collectively referred to as decompression means 8, but may perform a function as the decompression means 8 of the present invention even in a form not mentioned in the present embodiment. The decompression means 8 may be in any form as long as it does not depart from the spirit of the present invention.

FIG. 5 (B) shows the pH diagram of the condenser according to the present invention. As shown in FIG. 4, the condenser of the present invention shown in FIG. Works across. As can be seen from the pH diagram, in the condenser according to the present invention, the refrigerant passing through the condenser D1 region is first dried by passing through the second receiver 9 region, and then depressurized while passing through the decompression unit D2 region. After the recondensation occurs through the recondensation unit D3, the recondensation takes place again to the first receiver 7 region, thereby ensuring that the refrigerant discharged under any conditions becomes completely liquid and enters the expansion valve. It becomes possible.

In particular, when comparing the prior art shown in FIGS. 2 and 3 with the present invention, in the case of the prior art 3 shown in FIG. 2, the condensation unit D1 region, the decompression unit D2 region, and the recondensation unit D3 are shown. Area or condensation part D1 area, second receiver 9 area, pressure reduction part D2 area and recondensation part D3 area, and in the case of the prior art 5 shown in FIG. Area, the pressure reducing part D2 area, and the first receiver 7 area, and thus it is impossible to guarantee that the refrigerant discharged from the condenser becomes completely liquid under any conditions. On the other hand, according to the present invention, the refrigerant is completely liquid under all conditions and discharged to eliminate the possibility of malfunction in the expansion valve, and the expansion valve is smoothly controlled to maximize the cooling efficiency of the entire cooling system. Will be effective.

4 and 5, the present invention is not limited thereto, and the present invention is further provided between the condensation unit D1 region and the recondensing unit D3 region (or after the condensation unit D1 region). In the case where the pressure reducing unit D2 is provided between the two receivers 9 region and the recondensing unit D3 region, the first receiver 7 region is provided after the recondensing unit D3 region. A low flow path may be configured.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It goes without saying that various modifications can be made.

As described above, according to the present invention, the refrigerant discharged from the condenser passes through the first receiver after depressurizing, thereby ensuring that the refrigerant flowing into the expansion valve through the condenser is surely liquid. In addition, since the liquid phase of the refrigerant flowing into the expansion valve is stabilized, the control of the expansion valve is easy, and the effect of damage and shortening of the life of the expansion valve is greatly reduced. In addition, there is, of course, a great effect of increasing the cooling efficiency of the overall cooling system.

Claims (4)

A pair of parallel header tanks 2 and 3; Tubes 4 arranged between the header tanks 2 and 3; A heat dissipation fin interposed between the tubes (4); It is provided in the header tank (2, 3), the inlet (5) for the refrigerant flows in and the outlet (6) for discharging the refrigerant; A baffle provided inside the header tanks 2 and 3 to partition an inner space of the header tanks 2 and 3; In the condenser (1) comprising a, In the condenser 1, a pressure reducing unit D2 region having a pressure reducing means 8 in the form of a pressure reducing orifice 8a is formed, so that the region between the inlet 5 and the pressure reducing means 8 is condensed. A portion (D1) is formed and the region between the decompression means (8) and the outlet (6) forms a region of recondensation (D3), and a first receiver (7) is provided downstream of the outlet (6). Became, The refrigerant is sequentially discharged from the condenser 1 by passing through the pressure reducing unit D2 and the recondensing unit D3 in the form of the condensing unit D1-a pressure reducing orifice 8a. A condenser, characterized in that it is passed through the 1 receiver 7 to be discharged as a liquid refrigerant form. delete delete delete

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