JP2005164170A - Heat exchanger unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress the occurrence of thermal stress in a cover storing and holding a heat exchanger core and thermal influences on peripheral components. <P>SOLUTION: This heat exchanger unit 11 comprises the heat exchanger core 2 for heat exchange between fluid A flowing in the outside and fluid B flowing in the inside, the cover 13 storing the heat exchanger core 2 and forming an induction passage 4 for the fluid A flowing in the outside of the heat exchanger core 2. Inside a wall 130 constituting the cover 13, a refrigerant passage 14 having an inlet portion 14A and an outlet portion 14B is provided for cover cooling refrigerant to flow. The refrigerant flows in the refrigerant passage 14 to cool the cover 13. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a heat exchanger unit in which a heat exchanger core is disposed inside a cover constituting a fluid guiding path.

  2. Description of the Related Art Conventionally, a heat exchanger unit having a structure in which a heat exchanger core that exchanges heat between a fluid A flowing outside and a fluid B flowing inside is housed inside a cover that forms a guide path for the fluid A is known. (See Patent Document 1).

  FIG. 5 is a configuration diagram showing a conventional example of this type of heat exchanger unit, in which (a) is an external perspective view, and (b) is a cross-sectional view taken along the line II-II of (a). The heat exchanger unit 1 includes a heat exchanger core 2 and a cover 3 that accommodates the heat exchanger core 2.

  The heat exchanger core 2 is composed of a large number of tubes and fins, and allows the fluid A to flow to the outside, thereby exchanging heat with the fluid B flowing in the tube (here, the fluid A is set to the outside). Flowing means flowing the fluid A to the outer surface of the tube, the fins, and the outer periphery). The heat exchanger core 2 is provided with an introduction pipe 2A for introducing a fluid B as a refrigerant into the tube and a lead-out pipe 2B for leading the refrigerant in the tube to the outside.

  The cover 3 is for making the fluid A efficiently contact the surface of the heat exchanger core 2 by forming the guide path 4 through which the fluid A flows in the inside thereof, and the rectangular heat exchanger core 2. A rectangular frame-shaped housing portion 3A and reducer-shaped duct portions 3B and 3C integrated on the front and rear sides thereof.

For example, when the gas is cooled using the heat exchanger unit 1, the refrigerant (fluid B) is supplied to the tube of the heat exchanger core 2 while flowing the gas (fluid A) to be cooled into the cover 3. Flow inside. Thereby, heat exchange can be performed between the heat of the gas and the refrigerant through the tube wall of the tube.
Japanese Patent Laid-Open No. 9-273886

  By the way, when a very high temperature gas (for example, a high temperature gas of 500 ° C. or more) is flowed as the fluid A into the cover 3 of the conventional heat exchanger unit 1 described above, the cover 3 and the heat exchanger core 2 A large temperature difference will occur between them. Then, since the coefficient of thermal expansion differs depending on the material of each member, particularly a large thermal stress is generated in the cover 3 that accommodates and holds the heat exchanger core 2.

  In addition, when a high-temperature gas is flowed, the cover 3 itself becomes high temperature, and heat is generated when other parts are arranged in the vicinity. Therefore, it is necessary to insulate these parts with a heat insulating material or the like. there were.

  The objective of this invention is providing the heat exchanger unit which can suppress the generation | occurrence | production of the thermal stress in the cover of a heat exchanger unit, and the influence of the heat with respect to a peripheral component.

  The invention according to claim 1 is a heat exchanger core that exchanges heat between the fluid A flowing outside and the fluid B flowing inside, and accommodates the heat exchanger core and flows outside the heat exchanger core. A heat exchanger unit comprising a cover that forms a guide path for the fluid A, wherein the cover is provided with a refrigerant passage having an inlet portion and an outlet portion for allowing a coolant for cooling the cover to flow. To do.

  According to a second aspect of the present invention, in the heat exchanger unit according to the first aspect, the refrigerant passage is formed inside a wall constituting the cover.

  According to a third aspect of the present invention, in the heat exchanger unit according to the first aspect, the refrigerant pipe constituting the refrigerant passage is disposed in close contact with the surface of the wall constituting the cover.

  According to a fourth aspect of the present invention, in the heat exchanger unit according to any one of the first to third aspects, the inlet portion is connected to an introduction pipe for introducing the fluid B into the heat exchanger core. An outlet portion is connected to a lead-out pipe for deriving the fluid B from the heat exchanger core, and a part of the fluid B flowing through the heat exchanger core is allowed to flow as the cover cooling refrigerant through the refrigerant flow path. Features.

  According to a fifth aspect of the present invention, in the heat exchanger unit according to the fourth aspect, the inlet portion is a hole portion that penetrates between the introduction pipe that introduces the fluid B into the heat exchanger core and the refrigerant passage. In addition, the outlet portion is configured as a hole portion penetrating between the outlet pipe for leading the fluid B from the heat exchanger core and the refrigerant passage.

  According to the first aspect of the present invention, the cover is cooled by the refrigerant flowing through the refrigerant passage, so that the cover can be prevented from becoming hot. Therefore, even when a very high temperature gas is allowed to flow inside the cover, the temperature difference between the heat exchanger core and the cover can be kept small, and the thermal stress generated in the cover can be reduced. Further, since the temperature of the cover can be lowered, even when the heat exchanger unit is arranged in a narrow space, the influence of heat on the surrounding components can be suppressed to a low level.

  According to the second aspect of the present invention, since the refrigerant passage is formed inside the wall constituting the cover, a compact structure can be achieved.

  According to the invention of claim 3, since the refrigerant pipe constituting the refrigerant passage is disposed in close contact with the surface of the wall constituting the cover, the refrigerant passage can be easily made, and the existing cover Can also be applied easily.

  According to the fourth aspect of the invention, since a part of the fluid B flowing through the heat exchanger core is used as the cover cooling refrigerant, the facility for supplying the refrigerant is not required, and the configuration of the entire heat exchanger unit is simplified. Can be Moreover, since the cover is cooled using the refrigerant flowing through the heat exchanger core, the temperature difference between the cover and the heat exchanger core can be further reduced.

  According to the invention of claim 5, since it is not necessary to connect between the introduction pipe and the outlet pipe and the refrigerant passage by piping, the number of parts can be reduced.

  Hereinafter, the best mode for carrying out the heat exchanger unit according to the present invention will be described.

  FIG. 1 is a configuration diagram of a heat exchanger unit according to the first embodiment, where (a) is a cross-sectional view on one side surface (corresponding to a cross-sectional view taken along line III-III in FIG. 5), and (b) is a cross-sectional view of It is the II sectional view taken on the line.

  The heat exchanger unit 11 includes a heat exchanger core 2 having a rectangular surface through which the fluid A passes, and a metal or resin cover 13 that accommodates the heat exchanger core 2.

  The heat exchanger core 2 is made up of a number of metal tubes and fins (not shown). The fluid B passes through the outside of the tubes and comes into contact with the outer surface of the tubes and the fins. Heat exchange. As shown in FIG. 1B, the heat exchanger core 2 has an introduction pipe 2A for introducing a fluid B as a refrigerant into the tube, and a lead-out pipe 2B for leading the refrigerant in the tube to the outside. And are provided. The introduction pipe 2A and the lead-out pipe 2B penetrate the wall 130 of the cover 13 and are drawn out to the outside.

  As shown in FIG. 1 (a), the cover 13 forms the guide path 4 through which the fluid A flows, thereby allowing the fluid A to contact the surface of the heat exchanger core 2 efficiently. And a rectangular frame-shaped housing portion 13A that accommodates the rectangular heat exchanger core 2, and reducer-shaped duct portions 13B and 13C integrated in the front and rear thereof.

  Inside the wall 130 constituting the cover 13, there is provided a refrigerant passage 14 having an inlet portion 14 </ b> A and an outlet portion 14 </ b> B through which a coolant for cooling the cover is passed. That is, the wall 130 of the cover 13 is configured as a double wall of the inner wall 131 and the outer wall 132, and the refrigerant passage 14 is formed between the inner wall 131 and the outer wall 132. The refrigerant passage 14 may be formed only at least in the housing portion 13A, but in the present embodiment, the refrigerant passage 14 is also formed in the duct portions 13B and 13C. The heat exchanger core 2 is accommodated and held inside the inner wall 131 of the housing portion 13A.

  The inlet portion 14A and the outlet portion 14B of the refrigerant passage 14 are provided on the outer wall 132 so that the refrigerant can be supplied and discharged from the outside. The inlet portion 14A and the outlet portion 14B are provided below and above the housing portion 13A for the sake of convenience in FIG. 1B, but can be provided at arbitrary positions in consideration of the refrigerant flow path and the like.

  For example, when the gas is cooled by using the heat exchanger unit 11, the refrigerant (fluid B) is passed through the introduction pipe 2A and the outlet pipe 2B while flowing the gas (fluid A) to be cooled into the cover 13. By flowing in the tube of the heat exchanger core 2, heat can be exchanged between the heat of the gas and the refrigerant through the tube wall of the tube.

  Here, for example, when heat is exchanged by flowing a high-temperature gas into the cover 13, the refrigerant is circulated through the refrigerant passage 14 secured inside the wall 130 of the cover 13 through the inlet portion 14 </ b> A and the outlet portion 14 </ b> B. Let Then, the cover 13 is cooled by the refrigerant flowing through the refrigerant passage 14, and the cover 13 can be prevented from becoming high temperature. Therefore, even when a very high temperature gas is allowed to flow inside the cover 13, the temperature difference between the heat exchanger core 2 and the cover 13 can be kept small. Therefore, the thermal stress generated in the cover 13 due to the difference in thermal expansion coefficient. Can be reduced. In addition, since the temperature of the cover 13 can be lowered, even when the heat exchanger unit 11 is arranged in a narrow space, it is possible to suppress the thermal effect on the surrounding components. Therefore, when other parts are arranged around the heat exchanger unit 11, it is not necessary to insulate these parts with a heat insulating material or the like, and the cost can be reduced. Furthermore, in the present embodiment, since the refrigerant passage 14 is formed inside the wall 130 constituting the cover 13, a compact structure can be achieved.

  FIG. 2 is a cross-sectional view illustrating a configuration of a heat exchanger unit according to the second embodiment, and illustrates a cross-sectional shape corresponding to FIG.

  In the heat exchanger unit 11B of the present embodiment, the pipes constituting the inlet portion 14A and the outlet portion 14B of the refrigerant passage 14 are connected to the refrigerant introduction pipe 2A and the outlet pipe 2B of the heat exchanger core 2, respectively.

  According to the above configuration, the refrigerant (fluid B) introduced into the heat exchanger core 2 is introduced into the heat exchanger core 2 through the introduction pipe 2A, and a part of the refrigerant is introduced from the introduction pipe 2A through the inlet portion 14A. It is introduced into the passage 14. On the other hand, the refrigerant (fluid B) led out from the heat exchanger core 2 is led out of the unit through the lead-out pipe 2B, and the refrigerant led out from the refrigerant passage 14 is also led from the outlet portion 14B to the lead-out pipe 2B. Derived outside the unit.

  In this way, in this embodiment, a part of the refrigerant introduced into the heat exchanger core 2 can be used as the cover cooling refrigerant, so that the compressor, tank, piping, etc. for supplying the cover cooling refrigerant are used. It is not necessary to provide the heat exchanger unit, and the configuration of the entire heat exchanger unit can be simplified.

  Moreover, since the cover 13 is cooled using the refrigerant | coolant which flows into the heat exchanger core 2, the temperature difference of the cover 13 and the heat exchanger core 2 can be made smaller. Therefore, the thermal stress generated in the cover 3 can be further reduced due to the difference in thermal expansion coefficient.

  FIG. 3 is a cross-sectional view illustrating another configuration example of the second embodiment. In this heat exchanger unit 11C, holes that penetrate between the introduction pipe 2A and the lead-out pipe 2B and the refrigerant passage 14 are formed in the pipe wall of the refrigerant introduction pipe 2A and the lead-out pipe 2B and in contact with the refrigerant passage 14. Part is formed, and these hole parts serve as the inlet part 14A and the outlet part 14B.

  In the above configuration, since it is not necessary to connect the introduction pipe 2A and the outlet pipe 2B and the refrigerant passage 14 with piping, it is possible to reduce costs and improve productivity by reducing the number of parts.

  FIG. 4 is an external view showing the configuration of the heat exchanger unit according to the third embodiment.

  In the heat exchanger unit 21, the refrigerant pipe 24 constituting the refrigerant passage is disposed in close contact with the outer surface of the wall 230 constituting the cover 23. The cover 23 shown in FIG. 4 includes a housing portion 23A and duct portions 23B and 23C, and is equivalent to that shown in FIG. 5, and has a range from the front duct portion 23B to the rear duct portion 23B. A refrigerant pipe 24 is wound over the entire surface. The cover 23 is cooled by circulating the refrigerant in the refrigerant pipe 24 with one end of the refrigerant pipe 24 being the refrigerant inlet 24A and the other end being the outlet 24B.

  Even when the refrigerant pipe 24 is wound around the outer surface of the cover 23 as in the present embodiment, it is possible to prevent the cover 23 from reaching a high temperature by flowing the refrigerant through the refrigerant pipe 24. Therefore, even when a very high temperature gas is allowed to flow inside the cover 23, the temperature difference between the internal heat exchanger core (not shown) and the cover 23 can be kept small, and the thermal stress generated in the cover 23 can be reduced. Further, even when the heat exchanger unit 21 is arranged in a narrow space, since the heat influence on the surrounding parts can be suppressed small, when arranging other parts around the heat exchanger unit 21, It is not necessary to insulate these parts with a heat insulating material or the like, and the cost can be reduced.

  In particular, in the present embodiment, since it is not necessary to make the inside of the cover 23 have a double structure, the refrigerant passage can be easily manufactured. Therefore, it can be easily applied to the existing cover 23.

  Further, as in the second embodiment (FIG. 2), the inlet portion 24A and the outlet portion 24B of the refrigerant pipe 24 and the refrigerant inlet pipe 2A and outlet pipe 2B of the heat exchanger core 21 are respectively connected by pipes (not shown). You may comprise so that it may connect.

1 is a configuration diagram of a heat exchanger unit according to Embodiment 1. FIG. (A) is sectional drawing in one side. (B) is the II sectional view taken on the line of (a). Sectional drawing which shows the structure of the heat exchanger unit concerning Example 2. FIG. Sectional drawing which shows the other structural example of Example 2. FIG. FIG. 6 is an external view showing a configuration of a heat exchanger unit according to Embodiment 3. The block diagram which shows the prior art example of a heat exchanger unit. (A) is an external perspective view. (B) is the II-II sectional view taken on the line of (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 11, 11B, 11C, 21 ... Heat exchanger unit 2 ... Heat exchanger core 2A ... Introducing pipe 2B ... Outlet pipe 3, 13, 23 ... Cover 3A, 13A, 23A ... Housing part 3B, 3C, 13B, 13C , 23B, 23C ... duct part 4 ... induction path 14 ... refrigerant path 14A, 24A ... inlet part 14B, 24B ... outlet part 24 ... refrigerant pipe

Claims (5)

A heat exchanger core (2) for exchanging heat between the fluid A flowing outside and the fluid B flowing inside, and the heat exchanger core (2) are accommodated and the outside of the heat exchanger core (2). A heat exchanger unit comprising a cover (13, 23) forming a guide path (4) for the fluid A flowing through
The cover (13, 23) is provided with a refrigerant passage (14, 24) having an inlet portion (14A, 24A) and an outlet portion (14B, 24B) for flowing a coolant for cooling the cover. Heat exchanger unit (11, 21) to be used.   The heat exchanger unit (11) according to claim 1, wherein the refrigerant passage (14) is formed in a wall (130) constituting the cover (13).   The heat exchanger unit (1) according to claim 1, wherein a refrigerant pipe (24) constituting the refrigerant passage is disposed in close contact with a surface of a wall (230) constituting the cover (23). 21).   The inlet part (14A) is connected to the introduction pipe (2A) for introducing the fluid B into the heat exchanger core (2), and the outlet part (14B) is connected to the fluid from the heat exchanger core (2). A part of the fluid B, which is connected to the outlet pipe (2B) for leading out B and flows to the heat exchanger core (2), flows to the refrigerant flow path (14, 24) as the cooling refrigerant for the cover. The heat exchanger unit (11B, 11C) according to any one of claims 1 to 3, characterized in that The inlet portion (14A) is configured as a hole portion penetrating between the introduction pipe (2A) for introducing the fluid B into the heat exchanger core (2) and the refrigerant passage (14), and the outlet portion. 5. (14B) is configured as a hole penetrating between the outlet pipe (2B) for leading out the fluid B from the heat exchanger core (2) and the refrigerant passage (14). The heat exchanger unit (11C) described in 1.

Images