JP6464926B2 - Refrigerant piping connection fitting - Google Patents

Description

  The present invention relates to a joint for connecting a refrigerant pipe.

  Conventionally, in Patent Document 1, a protrusion is formed on one connector of a pair of connectors for connecting refrigerant piping, and a hole is formed on the other connector.

  When a pair of connectors are combined, one protrusion is inserted into the other hole. This prevents connectors with different shapes from being assembled incorrectly.

  In this prior art, a pair of connectors are fastened and fixed by bolts.

Korean Published Patent No. 10-2013-0019149

  In the above prior art, the protrusion and the hole are formed in the central portion of the connector. Specifically, the protrusion and the hole are formed between the coolant channel hole and the bolt hole. Moreover, in the above-described conventional technology, the height of the protrusion is low.

  Therefore, even if a connector in which a protrusion is formed is combined with a connector in which a hole is not formed, both the connectors are substantially parallel to each other, so that fastening with bolts is possible. As a result, it is difficult to discover that connectors having different shapes are combined, and there is a problem that incorrect assembly of connectors having different shapes cannot be sufficiently prevented.

  The present invention has been made in view of the above points, and it is an object of the present invention to reliably prevent erroneous assembly of connectors having different shapes.

In order to achieve the above object, in the invention described in claim 1,
A first connector (13) having a first refrigerant passage hole (13b) through which the refrigerant flows and a first bolt hole (13c) through which the bolt (17) is passed;
A second connector (21) having a second refrigerant passage hole (21b) through which the refrigerant flows and a second bolt hole (21c) through which the bolt (17) passes,
The first refrigerant channel hole (13b) and the second refrigerant channel hole (21b) are superposed on each other,
The first bolt hole (13c) and the second bolt hole (21c) are superposed on each other,
Of the first connector (13), the region outside the region (A13) located between the first refrigerant passage hole (13b) and the first bolt hole (13c) faces the second connector (21). A protruding portion (13d) is formed,
The second connector (21) is formed with an escape portion (21e) for escaping interference with the protrusion (13d) .
The protrusion (13d) is formed at the corner of the first connector (13),
The relief part (21e) has a shape in which the corner part of the second connector (21) is recessed .

  According to this, since the protrusion (13d) is formed in the vicinity of the outer edge of the first connector (13), a connector (30) having a shape different from that of the second connector (21) is combined with the first connector (13). If the protrusion (13d) of the first connector (13) interferes with the irregularly shaped connector (30), the irregularly shaped connector (30) is inclined with respect to the first connector (13) (see FIG. 4 described later). reference).

  For this reason, fastening with the bolt (17) becomes difficult, so that erroneous assembly of connectors (30) having different shapes can be reliably prevented.

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

It is a perspective view which shows the condenser assembly in one Embodiment. It is a perspective view showing an inlet side connector, a compressor side connector, and an inlet side bolt in one embodiment. It is a three-plane figure which shows the entrance side connector in one Embodiment. It is a side view which shows the incorrect assembly | attachment state of the connector in one Embodiment.

  Hereinafter, embodiments will be described with reference to the drawings. A condenser assembly 10 shown in FIG. 1 is a heat exchanger unit applied to a refrigeration cycle apparatus for vehicle air conditioning. The condenser assembly 10 includes a condenser 11, an inlet refrigerant pipe 12, an inlet side connector 13, an outlet refrigerant pipe 14, an outlet side connector 15, and a connector bracket 16.

  The condenser 11 is a heat exchanger that cools and condenses the high-temperature and high-pressure gas-phase refrigerant by exchanging heat between the high-temperature and high-pressure gas-phase refrigerant discharged from the compressor of the vehicle air-conditioning refrigeration cycle apparatus and the air.

  The refrigeration cycle apparatus for vehicle air conditioning includes a compressor, a condenser 11, an expansion valve, an evaporator, and the like. The compressor sucks, compresses and discharges the gas-phase refrigerant flowing out of the evaporator. The expansion valve decompresses and expands the high-pressure liquid-phase refrigerant cooled and condensed by the condenser 11. The evaporator evaporates the low-temperature and low-pressure liquid phase refrigerant decompressed and expanded by the expansion valve by heat exchange with air.

  The inlet refrigerant pipe 12 is a refrigerant pipe through which the refrigerant flowing into the condenser 11 flows. The inlet side connector 13 is connected to the inlet refrigerant pipe 12. The inlet side connector 13 is a refrigerant pipe connection joint for connecting the inlet refrigerant pipe 12 to a refrigerant pipe extending from the compressor of the refrigeration cycle apparatus for vehicle air conditioning.

  The outlet refrigerant pipe 14 is a refrigerant pipe through which the refrigerant flowing out of the condenser 11 flows. The outlet side connector 15 is connected to the outlet refrigerant pipe 14. The outlet side connector 15 is a refrigerant pipe connection joint for connecting the outlet refrigerant pipe 14 to the refrigerant pipe extending from the expansion valve of the refrigeration cycle apparatus for vehicle air conditioning.

  The connector bracket 16 is a member for fixing the inlet side connector 13 and the outlet side connector 15 to the condenser 11. An inlet side bolt 17 and an outlet side bolt 18 are fixed to the connector bracket 16 by welding.

  As shown in FIG. 2, the inlet side bolt 17 is used to fix the compressor side connector 21 to the inlet side connector 13. The compressor side connector 21 is connected to a refrigerant pipe extending from the compressor of the refrigeration cycle apparatus for vehicle air conditioning. The compressor-side connector 21 is a refrigerant pipe connection joint for connecting a refrigerant pipe extending from the compressor of the refrigeration cycle apparatus for vehicle air conditioning to the inlet refrigerant pipe 12.

  The inlet side bolt 17 passes through the inlet side connector 13 and the compressor side connector 21. A nut (not shown) is fastened to the tip of the inlet side bolt 17.

  The outlet side bolt 18 is used to fix the expansion valve side connector 22 to the outlet side connector 15. The expansion valve side connector 22 is connected to a refrigerant pipe extending from the expansion valve of the vehicle air conditioning refrigeration cycle apparatus. The expansion valve side connector 22 is a refrigerant pipe connection joint for connecting the refrigerant pipe extending from the expansion valve of the vehicle air conditioning refrigeration cycle apparatus to the outlet refrigerant pipe 14.

  The basic configuration of the outlet side connector 15, the expansion valve side connector 22 and the outlet side bolt 18 is the same as the basic configuration of the inlet side connector 13, the compressor side connector 21 and the inlet side bolt 17. Accordingly, reference numerals corresponding to the outlet side connector 15, the expansion valve side connector 22 and the outlet side bolt 18 are attached in parentheses in FIG. 2 to illustrate the outlet side connector 15, the expansion valve side connector 22 and the outlet side bolt 18. Omitted.

  As shown in FIG. 3, the inlet side connector 13 has both end surfaces 131 and 132 formed flat. One end surface 131 of the inlet-side connector 13 constitutes an inlet-side contact surface that contacts the compressor-side connector 21. The inlet side contact surface 131 is formed with an inlet side refrigerant flow path hole 13b, an inlet side bolt hole 13c, an inlet side protrusion 13d, and an inlet side relief part 13e.

  The inlet side refrigerant flow path hole 13 b is a refrigerant flow path communicating with the inlet refrigerant pipe 12. The inlet side bolt hole 13c is a hole through which the inlet side bolt 17 passes. The inlet side refrigerant passage hole 13b and the inlet side bolt hole 13c linearly penetrate the inlet side connector 13 from one end face 131 to the other end face 132.

  The inlet side protruding portion 13 d protrudes toward the compressor side connector 21. 13 d of entrance side protrusion parts are the incorrect assembly | attachment prevention means which prevents an incorrect assembly with the connector different from the compressor side connector 21. FIG. The height of the entrance-side protrusion 13d is 3 mm or more.

  The inlet side protrusion 13 d is formed at the corner of the inlet side contact surface 131. In other words, the inlet side protrusion 13 d is formed in the vicinity of the outer edge of the inlet side contact surface 131.

  Specifically, the inlet-side protrusion 13d is disposed outside a region A13 located between the inlet-side refrigerant flow path hole 13b and the inlet-side bolt hole 13c. In FIG. 3, this area A13 is hatched.

  The region A13 located between the inlet-side refrigerant flow hole 13b and the inlet-side bolt hole 13c includes two outer edges of the inlet-side refrigerant flow hole 13b, an inlet-side bolt hole 13c, and the two outer edges. It is an area surrounded by a common tangent line (virtual line).

  The inlet-side protrusion 13d is located on the opposite side of the inlet-side refrigerant passage hole 13b with respect to the inlet-side bolt hole 13c.

  13 d of entrance side protrusion parts are in the position which remove | deviated from the virtual straight line L13 which connects the center of the inlet side bolt hole 13c, and the center of the inlet side refrigerant | coolant flow path hole 13b.

  The inlet side relief portion 13e is formed in order to escape interference with the compressor side protrusion 21d of the compressor side connector 21. By forming the inlet side relief portion 13e, the inlet side connector 13 and the compressor side connector 21 can be brought into contact with each other and fixed.

  The basic configuration of the compressor side connector 21 is the same as the basic configuration of the inlet side connector 13, the compressor side connector 21 and the inlet side bolt 17. Accordingly, reference numerals corresponding to the compressor-side connector 21 are given in parentheses in FIG. 3, and the illustration of the compressor-side connector 21 is omitted.

  The compressor-side connector 21 has both end surfaces 211 and 212 formed flat, and one end surface 211 forms a compressor-side contact surface that contacts the inlet-side connector 21. The compressor-side contact surface 211 is formed with a compressor-side refrigerant passage hole 21b, a compressor-side bolt hole 21c, a compressor-side protrusion 21d, and a compressor-side escape portion 21e.

  The compressor side refrigerant flow path hole 21b is a refrigerant flow path communicating with a refrigerant pipe extending from the compressor. The compressor side refrigerant flow path hole 21b is a refrigerant flow path hole that overlaps with the inlet side refrigerant flow path hole 13b.

  The compressor side bolt hole 21c is a hole through which the inlet side bolt 17 passes. The compressor side bolt hole 21c is a bolt hole that overlaps with the inlet side bolt hole 13c.

  The compressor side refrigerant passage hole 21b and the compressor side bolt hole 21c linearly penetrate the compressor side connector 21 from one end surface 211 to the other end surface 212.

  The compressor side protrusion 21 d protrudes toward the inlet side connector 13. The compressor-side protruding portion 21d is an erroneous assembly preventing unit that prevents erroneous assembly with a connector different from the inlet-side connector 13. The height of the compressor side protrusion 21d is 3 mm or more.

  The compressor side protrusion 21 d is formed at a corner of the compressor side contact surface 211. In other words, the compressor side protrusion 21 d is formed in the vicinity of the outer edge of the compressor side contact surface 211.

  Specifically, the compressor side protrusion 21d is disposed outside a region A21 located between the compressor side refrigerant flow path hole 21b and the compressor side bolt hole 21c.

  The region A21 located between the compressor-side refrigerant channel hole 21b and the compressor-side bolt hole 21c includes the outer edge of the compressor-side refrigerant channel hole 21b, the outer edge of the compressor-side bolt hole 21c, and both outer edges. This is a region surrounded by two common tangent lines (virtual lines) in contact with.

  The compressor side protrusion 21d is located on the opposite side of the compressor side refrigerant passage hole 21b with respect to the compressor side bolt hole 21c.

  The compressor-side protrusion 21d is located away from an imaginary straight line L21 that connects the center of the compressor-side bolt hole 21c and the center of the compressor-side refrigerant passage hole 21b.

  The compressor side relief portion 21e is formed in order to escape interference with the inlet side protrusion 13d of the inlet side connector 13. By forming the compressor side relief portion 21e, the inlet side connector 13 and the compressor side connector 21 can be brought into contact with each other and fixed.

  FIG. 4 shows a state in which a connector 30 having a shape different from that of the compressor-side connector 21 is combined with the inlet-side connector 13. The connector 30 is not formed with a relief portion for escaping the interference with the inlet side protruding portion 13d. Therefore, the inlet-side protrusion 13d of the inlet-side connector 13 interferes with the connector 30, and the inlet-side connector 13 and the connector 30 cannot be brought into contact with each other and fixed. Therefore, it is possible to prevent the connector 30 from being erroneously assembled to the inlet side connector 13.

  Since the inlet-side protrusion 13 d is formed at the corner of the inlet-side contact surface 131, the connector 30 contacts the inlet-side connector 13 and the inlet-side bolt 17 when the inlet-side protrusion 13 d interferes with the compressor-side connector 21. It leans against it. Therefore, a nut (not shown) cannot be fastened to the tip of the inlet side bolt 17.

  Since the height of the inlet-side protrusion 13d is 3 mm or more, the inclination of the connector 30 with respect to the inlet-side connector 13 is increased. Therefore, the fastening with the inlet side bolt 17 becomes remarkably difficult, and it can be easily confirmed visually that the connector 30 is inclined with respect to the inlet side connector 13.

  Similarly, since the compressor-side protrusion 21 d is formed in the compressor-side connector 21, it is possible to prevent a connector having a shape different from that of the inlet-side connector 13 from being erroneously assembled to the compressor-side connector 21.

  Similarly, the outlet connector 15 and the expansion valve side connector 22 are formed with protrusions and relief portions, so that incorrect assembly of different connectors can be prevented.

  Hereinafter, one of the pair of connectors, the inlet side connector 13 and the compressor side connector 21, is referred to as a “first connector”, and the other connector is referred to as a “second connector”.

  Hereinafter, among the inlet-side refrigerant passage hole 13b and the compressor-side refrigerant passage hole 21b that are a pair of refrigerant passage holes, the refrigerant passage hole of the first connector is referred to as a “first refrigerant passage hole”. The coolant channel hole of the second connector is referred to as a “second coolant channel hole”.

  Hereinafter, of the inlet side bolt hole 13c and the compressor side bolt hole 21c which are a pair of bolt holes, the bolt hole of the first connector is referred to as “first bolt hole”, and the bolt hole of the second connector is referred to as “second bolt hole”. Say “bolt holes”.

  Hereinafter, of the inlet-side projection 13d and the compressor-side projection 21d, the projection of the first connector is simply referred to as “projection”, and the projection of the second connector is referred to as “second projection”.

  Hereinafter, of the inlet side escape portion 13e and the compressor side escape portion 21e, the escape portion of the second connector is simply referred to as “relief portion”, and the escape portion of the first connector is referred to as “second escape portion”. Hereinafter, the inlet side bolt 17 is simply referred to as a “bolt”.

  In the present embodiment, a protruding portion that protrudes toward the second connector is formed in an outer portion of a region located between the first coolant channel hole and the first bolt hole in the first connector. The second connector is formed with a relief portion for escaping the interference with the protrusion.

  According to this, since the protruding portion is formed in the vicinity of the outer edge of the first connector, a connector having a shape different from that of the second connector (hereinafter referred to as an irregularly shaped connector) is combined with the first connector. When the protrusions interfere with the irregularly shaped connector, the irregularly shaped connector is inclined with respect to the first connector (see FIG. 4).

  Therefore, since fastening with bolts becomes difficult, erroneous assembly of the irregularly shaped connector can be reliably prevented.

  In this embodiment, since the height of the protrusion is 3 mm or more, the inclination of the irregularly shaped connector with respect to the first connector is increased. Therefore, fastening with bolts becomes remarkably difficult, and it can be easily confirmed visually that the irregularly shaped connector is tilted with respect to the first connector, so that erroneous assembly of the irregularly shaped connector can be prevented more reliably.

  In the present embodiment, the protrusion is located on the opposite side of the first coolant channel hole with respect to the first bolt hole. According to this, since the inclination of the irregularly shaped connector with respect to the first bolt hole is increased, fastening by the inlet side bolt 17 becomes remarkably difficult. As a result, erroneous assembly of the irregularly shaped connector can be prevented more reliably.

  In the present embodiment, the protrusion is located away from an imaginary straight line connecting the center of the first bolt hole and the center of the first refrigerant flow path hole. According to this, since the inclination of the irregularly shaped connector with respect to the first bolt hole becomes large, fastening with the bolt becomes remarkably difficult. As a result, erroneous assembly of the irregularly shaped connector can be prevented more reliably.

  In the present embodiment, a second protrusion that protrudes toward the first connector is formed in an outer portion of a region located between the second refrigerant passage hole and the second bolt hole in the second connector. The first connector is formed with a second escape portion for allowing the second protrusion to escape.

  According to this, for the same reason as described above, it is possible to reliably prevent a connector having a shape different from that of the first connector from being erroneously assembled to the second connector.

(Other embodiments)
The above embodiment can be variously modified as follows, for example.

  (1) In the above embodiment, both the inlet-side connector 13 and the compressor-side connector 21 are formed with protrusions and reliefs. However, one of the inlet-side connector 13 and the compressor-side connector 21 has a protrusion. A relief part may be formed in the other connector of the inlet side connector 13 and the compressor side connector 21.

  (2) In the above embodiment, each connector has one protrusion and one relief. However, each connector may have a plurality of protrusions and one relief.

13 Inlet connector (first connector)
13b Inlet side refrigerant passage hole (first refrigerant passage hole)
13c Inlet side bolt hole (first bolt hole)
13d Inlet side protrusion (protrusion)
13e Entrance side relief part (second relief part)
17 Inlet bolt (bolt)
21 Compressor side connector (second connector)
21b Compressor side refrigerant passage hole (second refrigerant passage hole)
21c Compressor side bolt hole (second bolt hole)
21d Compressor side protrusion (second protrusion)
21e Compressor side relief (relief)

Claims (5)

A first connector (13) having a first refrigerant passage hole (13b) through which the refrigerant flows and a first bolt hole (13c) through which the bolt (17) is passed;
A second connector (21) having a second refrigerant passage hole (21b) through which the refrigerant flows and a second bolt hole (21c) through which the bolt (17) passes,
The first refrigerant channel hole (13b) and the second refrigerant channel hole (21b) are superposed on each other,
The first bolt hole (13c) and the second bolt hole (21c) are superposed on each other,
Of the first connector (13), the second connector (13) has an area outside the region (A13) located between the first coolant channel hole (13b) and the first bolt hole (13c). 21) and a protrusion (13d) protruding toward the
The second connector (21) is formed with an escape portion (21e) for escaping interference with the protrusion (13d) ,
The protrusion (13d) is formed at a corner of the first connector (13),
The said relief part (21e) has a shape which the corner part of the said 2nd connector (21) was dented, The refrigerant | coolant piping connection coupling characterized by the above-mentioned.   The refrigerant pipe connection joint according to claim 1, wherein a height of the protrusion (13d) is 3 mm or more.   The said protrusion part (13d) is located in the other side of a said 1st refrigerant | coolant flow path hole (13b) with respect to the said 1st bolt hole (13c), The Claim 1 or 2 characterized by the above-mentioned. Refrigerant piping connection joint.   The protrusion (13d) is located away from an imaginary straight line (L13) connecting the center of the first bolt hole (13c) and the center of the first refrigerant flow path hole (13b). The refrigerant pipe connection joint according to claim 3. Of the second connector (21), the first connector (21) has an area outside the region (A21) located between the second refrigerant passage hole (21b) and the second bolt hole (21c). 13) a second protrusion (21d) protruding toward the
The first connector (13) is provided with a second relief portion (13e) for escaping the second protrusion (21d), according to any one of claims 1 to 4. Refrigerant piping connection joint.

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