KR20130083684A - Connection structure for gas cooling - Google Patents

Abstract

PURPOSE: A structure for fastening a connecting block for cooling a refrigerant is provided to prevent damage to a welding joint between a gas flow pipe and the block, to exclude an extra connecting block for fixation, and to save time and cost for manufacturing the block with reducing the welding joints. CONSTITUTION: A structure for fastening a connecting block for cooling a refrigerant includes the block (25), refrigerant flow pipes (23,24), and gas flow pipes (21,22). A refrigerant flow path (27) penetrating both ends of the block is integrally formed at one point inside the block, and a gas flow path (26) penetrating both ends of the block is integrally formed at the other point inside the block. The refrigerant flow pipes are respectively coupled to one and the other end of the refrigerant flow path. The gas flow pipes are respectively coupled to one and the other end of the gas flow path.

Description

Connection structure for refrigerant cooling

The present invention relates to a fastening structure of a connection block for refrigerant cooling. More specifically, an engine is cooled by cooling a refrigerant, which has been in a high temperature and high pressure state through a compressor and a condenser, by using an evaporator and a low temperature gas cooled when an air conditioner of the vehicle is operated. The present invention relates to a fastening structure of a refrigerant cooling connection block capable of improving fuel efficiency, but in particular, simplifying the structure to reduce manufacturing cost and time.

Gas circulating on the refrigeration cycle of an air conditioner installed in a vehicle is subjected to compression, condensation, expansion and evaporation processes. That is, the temperature, pressure, and state of the gas are changed through the compressor, the condenser, the expansion valve, and the evaporator. At this time, the refrigerant passing through the compressor and the condenser is in a high temperature state, and the engine performance can be improved only by cooling it.

To this end, a technique for cooling a high temperature refrigerant using a low temperature gas has been proposed. Figure 1 (a) is a schematic side cross-sectional view for explaining a conventional apparatus for cooling a high temperature refrigerant, and (b) schematically shows the A-A cut surface of (a).

Referring to FIG. 1, conventionally, a refrigerant flow pipe 12 is positioned to surround a gas flow pipe 11 through which a low temperature gas cooled by an evaporator of an air conditioner flows, and on both sides of the refrigerant flow pipe 12. When the high temperature refrigerant flows through the refrigerant inlet pipe 14 connected to one fixing connection block 13 by positioning the fixing connection block 13, respectively, the refrigerant flow pipe 12 inside and the gas flow pipe 11 outside The refrigerant flows through the passage between the heat transfer to the low-temperature gas to cool the high-temperature refrigerant, the refrigerant is to be discharged through the refrigerant discharge pipe 15 connected to the opposite connection connection block (13).

At this time, the fixed connection block 13 is fixed to each component by welding (WP) the parts in contact with the gas flow pipe 11, the refrigerant flow pipe 12, the refrigerant inlet pipe 14 and the refrigerant discharge pipe 15, respectively. This prevents the refrigerant from flowing inside.

However, in the conventional apparatus, as shown in FIG. 4, since the gas flow pipe 11 and the fixing connection block 13 repeat expansion and contraction in opposite directions, the gas flow pipe 11 and the gas flow pipe 11 are fixed when used for a long time. There is a problem that the welded portion (WP) for joining the connection connecting block 13 is damaged by receiving a continuous opposite load and the leakage of the refrigerant occurs.

In addition, in the conventional apparatus, a separate refrigerant flow tube 12 and a separate fixing connection block 13 should be provided, and the fixing connection block 13 is a gas flow tube 11, a refrigerant flow tube 12, and Since all of the portions in contact with the refrigerant inlet pipe 14 (or the refrigerant discharge pipe 15) must be welded (WP), there are disadvantages in that the number of welded portions (WP) increases, so that the production time is long and the production cost is also increased.

The present invention has been made to solve the problems of the prior art as described above, by placing an integrated refrigerant cooling connection block between the gas flow pipe and the refrigerant flow pipe and welded to each of the tubes, the gas flow pipe and the connection block The purpose of the present invention is to provide a fastening structure of the refrigerant cooling connection block which can prevent the damage between the welded parts, does not need a separate fixing connection block, and can reduce the welding area to reduce the production time and cost. There is this.

The object of the present invention is that the refrigerant flow passage is formed through the both ends at one point of the inner side and the gas flow passage is formed through both ends at the other point of the inner side so that the refrigerant flow passage and the gas flow passage are integrally formed A refrigerant cooling connection block, and a refrigerant flow pipe coupled to one end and the other end of the refrigerant flow passage of the refrigerant cooling connection block and coupled to one end and the other end of the gas flow passage of the refrigerant cooling connection block. And a gas flow pipe configured to circulate the gas, wherein the refrigerant flow pipes are welded to and fixed to the one end and the other end of the refrigerant flow passage of each of the refrigerant cooling connection blocks, and the gas flow pipe is connected to the gas flow pipe. Refrigerant cooling, characterized in that welded and fixed to the one end and the other end of the gas flow passage of the refrigerant cooling connection block It is achieved by the connecting structure of the connection block.

In addition, in order to achieve the above object, the refrigerant flow pipe is welded and fixed around the end in a state where each end is fitted inside the one end and the other end of the refrigerant flow passage of the refrigerant cooling connection block, the gas flow pipe It is preferable that the circumference is welded and fixed in a state of being fitted inside the one end and the other end of the gas flow passage of the refrigerant cooling connection block.

According to the fastening structure of the refrigerant cooling connecting block according to the present invention, by connecting the gas flow pipe and the refrigerant flow pipe welded to both ends of the integral refrigerant cooling connecting block formed with the gas flow passage and the refrigerant flow passage, respectively, Cooling by low temperature gas (vaporized refrigerant) can improve the engine efficiency of the vehicle, and because it is an integrated structure instead of the conventional double pipe structure, damage to the gas flow pipe and the welded portion of the refrigerant flow pipe and the connection block is fundamental. It can be prevented and does not require a separate refrigerant flow tube or a fixed connection block, there is an effect that reduces the welded part and reduces the production time and cost.

1 is a view for explaining an apparatus for cooling a gas using a conventional double pipe structure,
Figure 2 is a perspective view for explaining a fastening structure of the refrigerant cooling connecting block according to an embodiment of the present invention,
Figure 3 is a schematic cross-sectional view for explaining the fastening structure of the connection block for refrigerant cooling according to an embodiment of the present invention,
4 is a state in which a) air conditioner operates in a double pipe structure for cooling a conventional gas, and a state where a high temperature refrigerant flows in a refrigerant flow pipe and a low temperature gas flows in the gas flow pipe, and b) immediately after the air conditioner operates. As a state, it is a partial sectional view which shows the state when a refrigerant | coolant does not flow in a refrigerant flow pipe, and gas does not flow in a gas flow pipe,
Figure 5 is a state in which the a) air conditioner in the fastening structure of the refrigerant cooling connection block according to the present invention when the high-temperature refrigerant flows in the refrigerant flow pipe and the low-temperature gas flows in the gas flow pipe and b) the air conditioner is It is a partial sectional view which shows the state immediately after operation | movement and when a refrigerant | coolant does not flow in a refrigerant flow tube, and gas does not flow in a gas flow tube.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, some configurations which are not related to the gist of the present invention may be omitted or compressed, but the configurations omitted are not necessarily those not necessary in the present invention, and they may be combined by a person having ordinary skill in the art to which the present invention belongs. .

The present invention provides a fastening structure of a refrigerant cooling connecting block for exchanging heat between a refrigerant passing through the compressor and the condenser and a gas passing through the evaporator (vaporized refrigerant) in a refrigeration cycle circulating a compressor, a condenser, an expansion valve, and an evaporator. It is about.

2 and 3 are a perspective view and a cross-sectional view for explaining the fastening structure of the connection block for refrigerant cooling according to an embodiment of the present invention. 2 and 3, the connection block 25 of the fastening structure of the refrigerant cooling connection block according to the embodiment of the present invention has a substantially cylindrical shape and a gas flow passage 26 and a refrigerant flow which are independent of each other so as to pass through both ends. The passages 27 are formed respectively.

The refrigerant cooling connection block 25 is a gas flow pipe (21, 22) is welded (WP) is coupled to both ends of the gas flow passage 26, respectively, and refrigerant flow pipes (both ends of the refrigerant flow passage 27, respectively) 23,24 are welded (WP).

Referring to Figure 3 (a) showing a side cross-sectional view of a state in which the gas flow pipes 21 and 22 and the refrigerant flow pipes 23 and 24 are coupled to the refrigerant cooling connection block 25, the gas flow pipe The low-temperature gas (refrigerant vaporized through the evaporator) flowing through the 22 is introduced into the gas flow passage 26 of the refrigerant cooling connection block 25 and discharged through the gas flow pipe 21 again. In addition, the high temperature and high pressure refrigerant flowing through the refrigerant flow pipe 23 (refrigerant brought into a high temperature and high pressure state through the compressor and the condenser) is introduced into the refrigerant flow passage 27 of the refrigerant cooling connection block 25 and flows again into the refrigerant. It is discharged through the pipe (22).

Here, the refrigerant cooling connecting block 25 is made of a material having high thermal conductivity. Therefore, the heat of the high temperature refrigerant passing through the refrigerant flow passage 27 is transferred to the gas flow passage 26 located immediately along the main body of the refrigerant cooling connection block 25 to pass the low temperature gas passing through the gas flow passage 26. As it passes through the refrigerant flow passage 27, the high temperature refrigerant is cooled to a certain level.

At this time, the gas flow pipes 21 and 22 at both ends of the gas flow passage 26 and the refrigerant flow pipes 23 and 24 at both ends of the refrigerant flow passage 27 are tightly sealed by welding (WP) so that the gas or the refrigerant Can't leak.

That is, the refrigerant cooling connection block 25 of the fastening structure according to the embodiment of the present invention is manufactured as an integral body in which a gas flow passage 26 and a refrigerant flow passage 27 are formed. Therefore, no separate refrigerant flow tube or fixing connection block is required as in the conventional apparatus.

In addition, only the welding (WP) for coupling the gas flow pipe 21 and the refrigerant flow pipe 23 is necessary based on one side of both ends of the refrigerant cooling connection block 25. Therefore, as in the conventional apparatus, the fixed connection block had to weld all the parts in contact with the gas flow tube, the refrigerant flow tube, and the refrigerant inlet tube (or the refrigerant discharge tube). It can be saved.

4 is a state in which a) air conditioner operates in a double pipe structure for cooling a conventional gas, and a state where a high temperature refrigerant flows in a refrigerant flow pipe and a low temperature gas flows in the gas flow pipe, and b) immediately after the air conditioner operates. As a state, it is a partial sectional drawing which shows the state when a refrigerant | coolant does not flow in a refrigerant flow tube, and gas does not flow in a gas flow tube.

As shown in FIG. 4, in a state in which an air conditioner operates in a double pipe structure for cooling a conventional gas, a high temperature refrigerant flows through a compressor and a condenser in a refrigerant flow pipe 14, and passes through an evaporator in a gas flow pipe 11. Low temperature gas flows. Therefore, a high temperature refrigerant is filled in the space inside the connection block 13 and a low temperature gas flows through the gas flow pipe 11. Therefore, the connection block 13 shows a tendency to expand because it is a high temperature state, and the gas flow tube 11 tends to contract because it is a low temperature state. In the portion where the connecting block 13 and the gas flow tube 11 are in contact with each other, the connecting block 13 and the contracting gas flow tube 11 to be expanded tend to be spaced apart from each other.

After stopping the operation of the air conditioner, the refrigerant flow tube 14 is no longer supplied with a high-temperature refrigerant, so that the connection block 13, which was in a high temperature state when the air conditioner is operating, gradually decreases in temperature and at the same time a low temperature state when the air conditioner is operated. The gas flow pipe 11 that was in the temperature is gradually raised. At this time, the connection block 13 is contracted and the gas flow pipe 11 is expanded. Therefore, the connection block 13 and the gas flow pipe 11 are in close contact with each other when the air conditioner operation is stopped in a state to be spaced apart from each other during the air conditioner operation. The welding part wp welding the connection block 13 and the gas flow pipe 11 at the same time is connected to the welding block wp when the connection block 13 and the gas flow pipe 11 are to be spaced apart from each other. 13) and the portion bonded to the gas flow pipe 11 of the welded portion wp are subjected to tension in opposite directions, so that the two points of the welded portion wp are subjected to opposite loads. It will weaken and eventually become damaged. If the welding site (wp) is damaged, the refrigerant gas is leaked to the outside, so the connection block must be replaced or newly welded again. That is, since the two points of the welded portion (wp) of the gas flow pipe 11 and the connecting block 13 receive loads in opposite directions when the air conditioner is operated and when the air conditioner is stopped, the gas flow pipe 11 and The welding site wp between the connection block 13 is damaged.

Figure 5 is a state in which the a) air conditioner in the fastening structure of the refrigerant cooling connection block according to the present invention when the high-temperature refrigerant flows in the refrigerant flow pipe and the low-temperature gas flows in the gas flow pipe and b) the air conditioner is It is a partial sectional view which shows the state immediately after operation | movement and when a refrigerant | coolant does not flow in a refrigerant flow tube, and gas does not flow in a gas flow tube.

As shown in FIG. 5, a high temperature refrigerant flows through the refrigerant flow pipe 23 and a low temperature gas flows through the gas flow pipe 21 while the air conditioner is operating. Therefore, the refrigerant flow passage 27 of the refrigerant cooling connection block 25 is filled with a high temperature refrigerant, and the gas flow passage 26 of the refrigerant cooling connection block 25 is filled with a low temperature gas. As a result, the peripheral region of the refrigerant flow passage 27 of the refrigerant cooling connection block 25 is in a high temperature state and thus tends to expand, and the refrigerant flow tube 23 is also in a high temperature state and thus expands. In addition, since the peripheral region of the gas flow passage 26 of the refrigerant cooling connection block 25 is in a low temperature state, it shows a tendency to contract, and the gas flow tube 21 also shows a tendency to contract because it is in a low temperature state. As a result, the peripheral region of the refrigerant flow passage 27 and the refrigerant flow tube 23 expand in the same direction, and the peripheral region of the gas flow passage 26 and the gas flow tube 21 contract in the same direction. Therefore, the welded portions of the refrigerant flow pipe 23 and the refrigerant flow passage 27 are in a state of little external force.

After the operation of the air conditioner is stopped, the refrigerant flow pipe 23 no longer flows with the high temperature refrigerant, so the surrounding areas of the refrigerant flow pipe 23 and the refrigerant flow passage 27 which are in a high temperature state at the time of operation of the air conditioner are gradually increased. The temperature will drop. At this time, since the refrigerant flow pipe 23 and the refrigerant flow passage 27 both contract in the same direction, the welding portion wp1 joining the end portions of the peripheral region of the refrigerant flow tube 23 and the refrigerant flow passage 27. Receives little external force. Similarly, after the operation of the air conditioner is stopped, the gas flow tube 21 no longer flows with low temperature gas, so that the surrounding areas of the gas flow tube 21 and the gas flow passage 26 which are in a low temperature state when the air conditioner is operated are Gradually the temperature rises. At this time, since the peripheral region of the gas flow tube 21 and the gas flow passage 26 are all expanded in the same direction, the welded portion joining the end portions of the gas flow tube 21 and the peripheral region of the gas flow passage 26. (wp2) also receives very little external force.

Therefore, the welding site wp1 joining the end portions of the peripheral region of the refrigerant flow passage 23 and the refrigerant flow passage 27 and the end portions of the peripheral region of the gas flow passage 21 and the gas flow passage 26 are joined to each other. The welded part wp2 has almost no change in the relative position of both parts joined by the welded part wp1 and wp2 both when the air conditioner is in the operating state and when the air conditioner is stopped. The problem that the wp2) is hardly subjected to the load and thus the welds wp1 and wp2 are damaged is solved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And additions should be considered as falling within the scope of the claims of the present invention.

21,22: gas flow pipe
23,24: refrigerant flow pipe
25: connection block for refrigerant cooling
26: gas flow passage
27: refrigerant flow passage
WP: Weld

Claims (2)

It is a fastening structure of a refrigerant cooling connecting block for exchanging heat between the compressor and the refrigerant passed through the condenser and the gas passed through the evaporator (vaporized refrigerant) on the refrigeration cycle circulating the compressor, condenser, expansion valve and the evaporator,
A refrigerant cooling connection block formed at one point of the inner side of the refrigerant flow passage through the both ends, and at another point of the inner side of the gas flow passage through the both ends, the refrigerant flow passage and the gas flow passage are integrally formed;
A refrigerant flow pipe coupled to one end and the other end of the refrigerant flow passage of the refrigerant cooling connection block to circulate the refrigerant; And
It includes a gas flow pipe coupled to one end and the other end of the gas flow passage of the refrigerant cooling connection block for circulating gas,
The refrigerant flow pipe is fixed at each end by welding to one end and the other end of the refrigerant flow passage of the refrigerant cooling connection block, and the gas flow tube is connected to the gas flow passage of the refrigerant cooling connection block. Fastening structure of the refrigerant cooling connection block, characterized in that fixed to one end and the other end is welded. The method of claim 1,
The refrigerant flow pipe is welded and fixed around the end in a state where each end is fitted inside the one end and the other end of the refrigerant flow passage of the refrigerant cooling connection block, and the gas flow tube is the refrigerant cooling connection block Fastening structure of the refrigerant cooling connecting block characterized in that the circumference is welded and fixed in the state fitted to the inside of the one end and the other end of the gas flow passage.

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