JP2013113470A - Refrigerant drier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerant drier capable of improving workability during assembly, reducing the number of components, and further preventing falling of components.SOLUTION: The refrigerant drier includes two lid bodies 3 each having a refrigerant outflow/inflow hole 2, a cylindrical body 5 for connecting each of the two lid bodies, a bar-shaped drying agent 6 housed inside the cylindrical body, a planar fixing base 9 which is provided inside each lid body and in which an outflow valve port 7 and an inflow valve port 8 are perforated, a valve body 15 which includes an outflow valve body part 10 fixed to a surface on the opposite side of the side facing the refrigerant outflow/inflow hole of the fixing base so as to open and close the outflow valve port by a fluid pressure of a refrigerant and an inflow valve body part 11 arranged to cover the inflow valve port and to open and close the inflow valve part by the fluid pressure of the refrigerant, and a valve sheet 12 fixed to a surface on an opposite side of the side facing the refrigerant outflow/inflow hole of the fixing base so as to regulate movement in a direction opening the outflow valve port of the outflow valve body part when the refrigerant flows in from the refrigerant outflow/inflow hole.

Description

  The present invention relates to a refrigerant dryer, and more particularly to a refrigerant dryer used in a refrigeration cycle such as an air conditioner.

  If moisture is contained in the refrigerant in the refrigeration cycle, it becomes a factor that hinders stable operation of the refrigeration cycle, so a refrigerant dryer is used. At this time, in the refrigerant dryer that can be used only in one direction, when used in an air conditioner that switches the refrigerant flow path for cooling and heating, it is necessary to arrange two refrigerant dryers, which complicates the refrigeration cycle. Therefore, in order to cover with one refrigerant dryer, the refrigerant dryer which can flow a refrigerant in the direction of forward and reverse is known (for example, refer to patent documents 1 and 2).

  As an example of the refrigerant dryer, as shown in FIG. 5, two lid bodies 33 (33 </ b> A, 33 </ b> B) each having a refrigerant inflow / outflow hole 32 (32 </ b> A, 32 </ b> B), and a valve mechanism disposed in each lid body 33. 34 (34A, 34B), a cylinder 35 that connects the two lid bodies 33, and a refrigerant dryer 31 that is fixed in the cylinder 35 and includes a rod-shaped desiccant 36 made of zeolite or the like. Yes.

  As shown in FIGS. 6A to 6C, the valve mechanism 34 of the refrigerant dryer 31 is formed in the vicinity of the outflow valve port 37 formed in the center portion and the outflow valve port 37. A fixed base 39 having an inflow valve port 38 formed therein, a plate-like inflow valve body 41, an outflow valve body 40, and a stopper 42.

  As shown in FIG. 6D, the inflow valve body 41 includes a base portion 41a, an insertion hole 41b drilled in the base portion 41a, a valve portion 41c, and a connecting portion that connects the base portion 41a and the valve portion 41c. 41d.

  As shown in FIG. 6 (e), the outflow valve element 40 includes a base portion 40a, an insertion hole 40b formed in the base portion 40a, and a valve portion 40c.

  As shown in FIG. 6F, the stopper 42 includes a base portion 42a, an insertion hole 42b drilled in the base portion 42a, and a stopper portion 42c.

  6 (a) to 6 (c), an outflow valve body 40 for opening and closing the outflow valve port 37, an inflow valve body 41 for opening and closing the inflow valve port 38, and the outflow A stopper 42 for restricting the movement of the valve body 40 is fixed by bolts 43 and nuts 44. Further, the fixing base 39 restricts the movement of the inflow valve body 41, and a desiccant 36 (see FIG. 5). A support member 45 made of stainless steel is fixed by caulking.

  As shown in FIG. 5, each of the upper and lower ends of the refrigerant dryer 31 including the valve mechanism 34 has the same configuration. Therefore, in FIG. 5, the same reference numerals are given to components common to the upper and lower end configurations, and A is assigned to those belonging to the upper configuration, and B is assigned to those belonging to the lower configuration. Continue to describe in.

  In the refrigerant dryer 31 shown in FIG. 5, when the refrigerant flows in from the refrigerant inflow / outflow hole 32A, the outflow valve body 40A is closed by the fluid pressure and the inflow valve body 41A is opened by the fluid pressure in the valve mechanism 34A. Flows into the cylinder 35 through the inflow valve port 38A. And it flows in into the inside from the outer peripheral surface with respect to the desiccant 36, and the water | moisture content contained in a refrigerant | coolant is absorbed by the desiccant 36. FIG. Thereafter, in the lower valve mechanism 34B, the outflow valve body 40B is opened by the fluid pressure and the inflow valve body 41B is closed by the fluid pressure, so that the refrigerant flows out from the refrigerant inflow / outflow hole 32B through the outflow valve port 37B. To do. Contrary to the above, when the refrigerant flows in from the refrigerant inflow / outflow hole 32B, the refrigerant dryer 31 functions in the same manner, although the refrigerant flows in the opposite direction.

Japanese Patent Laid-Open No. 5-141814 US Pat. No. 6,235,192

  However, in assembling the check valve mechanism 34 in the conventional refrigerant dryer 31, as shown in FIG. 6, the inflow valve body 41 is fixed from the cylindrical body 35 side of the fixing base 39 via the bolt 43. 39, and after attaching the outlet valve body 40 and the stopper 42 to the lid body 33 side, these were fixed via the nut 44, but it is necessary to attach parts to both sides of the fixing base 39, Due to the large number of parts, workability was poor and there was room for improvement. In addition, when fixed by screwing, there is a risk that the component may fall off due to external force such as vibration.

  Therefore, the present invention has been made in view of the problems in the conventional refrigerant dryer, and has good workability during assembly, can reduce the number of parts, and also prevents parts from falling off. It is an object of the present invention to provide a refrigerant dryer that can handle the above.

  In order to achieve the above object, the present invention is a refrigerant dryer, comprising two lid bodies each having a refrigerant inflow / outflow hole, a cylinder body that connects each of the two lid bodies, and accommodated in the cylinder body A desiccant to be provided, a fixing base provided in each of the lids and provided with an outflow valve port and an inflow valve port, and a side of the fixing base facing the refrigerant inflow / outflow hole. The outlet valve body is fixed to the side surface and opens and closes the outlet valve port by the fluid pressure of the refrigerant, and the inlet valve port is disposed so as to cover the inlet valve port. And a valve body having an inflow valve body portion that is opened and closed by the valve and a surface of the fixing base opposite to the side facing the refrigerant inflow / outflow hole, and when the refrigerant flows in from the refrigerant inflow / outflow hole And a valve seat for restricting movement of the outflow valve body in a direction to open the outflow valve port. That.

  According to the present invention, the valve mechanism for reversibly switching the refrigerant inflow and outflow to the refrigerant dryer is configured by the fixing base, the valve body, and the valve seat, so that the number of parts is reduced as compared with the prior art. In addition, since the valve body and the valve seat are fixed to one surface of the fixing base, workability at the time of assembly can be improved.

  In the refrigerant dryer, when the refrigerant flows out from the refrigerant inflow / outflow hole, the fixing base further moves in a direction in which the outflow valve body part opens a flowout valve port beyond a predetermined open position. The stopper part which restrict | limits this can be provided integrally. Thereby, it is not necessary to provide a separate stopper, the number of parts can be reduced, and workability at the time of assembly can be improved.

  In the refrigerant dryer, the support member for the desiccant is configured such that when the refrigerant flows in from the refrigerant inflow / outflow hole, the inflow valve body portion opens the inflow valve port beyond a predetermined open position. Further movement can be restricted. By making the support member function as a stopper, the number of parts can be reduced.

  In the refrigerant dryer, the valve body and the valve seat can be fixed to the fixing base by rivets, and parts can be prevented from falling off even when an external force such as vibration is applied.

  Further, the valve body and the valve seat have an insertion hole through which a protruding portion formed integrally with the fixed base is inserted, and after the protruding portion is inserted into the insertion hole, the protruding portion is caulked. Thus, the valve body and the valve seat can be fixed to the fixing base, and a rivet or the like need not be used, so that the number of parts can be further reduced.

  As described above, according to the present invention, it is possible to provide a refrigerant dryer that has good workability during assembly, can reduce the number of parts, and can prevent parts from falling off.

It is a schematic sectional drawing which shows one Embodiment of the refrigerant dryer which concerns on this invention. It is a figure which shows the valve mechanism of the refrigerant dryer shown in FIG. 1, Comprising: (a) is a front view, (b) is the sectional view on the AA line of (a), (c) is a back view, (d) is a figure. The front view which shows a valve body, (e) is a front view which shows a valve seat, (f) is sectional drawing which shows the state which fixed the valve body and the valve seat to the fixed base with the rivet, (g) is the valve body and the valve seat It is sectional drawing which shows the state fixed to the fixed stand by doweling processing. It is a figure which shows the upper part of the refrigerant dryer shown in FIG. 1, Comprising: (a) shows a valve mechanism and its vicinity, (b) is BB sectional drawing of (a). It is a figure which shows the protection member with which the refrigerant dryer shown in FIG. 1 was mounted | worn, Comprising: (a) is a front view, (b) is a side view. It is a schematic sectional drawing which shows an example of the conventional refrigerant dryer. It is a figure which shows the valve mechanism of the refrigerant dryer shown in FIG. 5, Comprising: (a) is a front view, (b) is CC sectional view taken on the line of (a), (c) is a back view, (d) is a figure. FIG. 5 is a front view showing an inflow valve body, (e) is a front view showing an outflow valve body, and (f) is a front view showing a stopper.

  Next, an embodiment of the refrigerant dryer according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows an embodiment of a refrigerant dryer according to the present invention. The refrigerant dryer 1 includes two lids 3 (3A, 3B) each having a refrigerant inflow / outflow hole 2 (2A, 2B). The valve mechanism 4 (4A, 4B) disposed in each of the lid bodies 3, the cylinder body 5 for connecting the two lid bodies 3, and the rod-like body made of zeolite or the like disposed in the cylinder body 5 The desiccant 6 and the support member 14 (14A, 14B) that supports the end of the desiccant 6 via the protective member 16 (16A, 16B) are configured. The lid 3, the cylinder 5 and the desiccant 6 have the same configuration as the lid 33, the cylinder 35 and the desiccant 36 of the conventional refrigerant dryer 31. Also in the refrigerant dryer 1, each of the upper and lower ends including the valve mechanism 4 has the same configuration. Therefore, in FIG. 1 and FIG. 3, the same reference numerals are assigned to components common to the upper and lower end configurations, A is assigned to those belonging to the upper configuration, and B is assigned to those belonging to the upper configuration. Continue to describe in.

  As shown in FIGS. 2A to 2C, the valve mechanism 4 of the refrigerant dryer 1 is formed in the vicinity of the outflow valve port 7 formed in the central portion and the outflow valve port 7. The inflow valve port 8 is formed with a fixed base 9, and a plate-like valve body 15 and a valve seat 12.

  The valve body 15 is formed of a flexible sheet, and as shown in FIG. 2D, a base portion 15a, an insertion hole 15b drilled in the base portion 15a, and two inflow valve body portions 11 , The outlet valve body portion 10 located in the center, the connecting portion 15c connecting the base portion 15a and the inflow valve body portion 11, and the connecting portion 15d connecting the base portion 15a and the outlet valve body portion 10. Is done. The fixed base 9 is integrally formed with a stopper portion 20. This stopper portion 20 restricts the outflow valve body portion 10 from further moving in the direction of opening the outflow valve port 7 beyond a predetermined open position when the refrigerant flows out of the refrigerant outflow / inflow hole 2. Further, it is possible to prevent the outflow valve body 10 from being damaged.

  As shown in FIG. 2 (e), the valve seat 12 includes a base portion 12a, a stopper portion 12c formed continuously with the base portion 12a, and an insertion hole 12b formed in the base portion 12a and the stopper portion 12c. Then, a hole portion 12d through which the refrigerant passes is formed in the central portion of the stopper portion 12c.

  As shown in FIG. 2 (f), the valve body 15 and the valve seat 12 are identical to the fixing base 9 by the rivet 13 inserted through the insertion hole 15 b of the valve body 15 and the insertion hole 12 b of the valve seat 12. Fixed to the surface. Further, as shown in FIG. 2B, a support member 14 that restricts the movement of the inflow valve body 11 and supports the desiccant 6 (see FIG. 1) is fixed to the fixing base 9 by caulking. . The support member 14 restricts the inflow valve body portion 11 from further moving in the direction of opening the inflow valve port 8 beyond the predetermined open position when the refrigerant flows in from the refrigerant inflow / outflow hole 2. It is possible to prevent the inflow valve body portion 11 from being damaged.

  In addition, without using the rivet 13 as shown in FIG. 2 (f), as shown in FIG. 2 (g), a part of the fixing base 9 is protruded, and the insertion hole 15b of the valve body 15 and the valve After inserting the insertion hole 12b of the seat 12, the valve body 15 and the valve seat 12 can be fixed to the fixing base 9 by crimping the protruding portion (doweling processing) (the crimping portion 9a).

  As shown in FIG. 3, the support member 14 </ b> A is formed in a dish shape using a metal material such as stainless steel, and a protective member 16 </ b> A for protecting the desiccant 6 in the recess, reinforcement of the support member 14 </ b> A, and securing a refrigerant flow path A punching metal 17 and a wire mesh 18 are provided.

  As shown in FIGS. 3B and 4, the protective member 16 (16 </ b> A) is formed of a resin such as polyester having a hardness lower than that of the metal so as to prevent the desiccant 6 from being worn. It is interposed between the agents 6. The protective member 16 can prevent the desiccant 6 from being worn even when an external force such as vibration is applied to the refrigerant dryer 1.

  Next, operation | movement of the refrigerant dryer 1 which has the said structure is demonstrated, referring FIG.1 and FIG.2.

  When the refrigerant flows in from the upper refrigerant inflow / outflow hole 2A, in the valve mechanism 4A, the inflow valve body portion 11A is opened by the fluid pressure, and the outflow valve body portion 10A is opened by the valve seat 12A. The refrigerant flows into the cylinder 5 through the inflow valve port 8A because it is prevented from moving in the direction of flowing to the cylinder 5 through 7A. And a refrigerant | coolant flows in into the inside from the outer peripheral surface with respect to the desiccant 6, and the water | moisture content contained in a refrigerant | coolant is absorbed by the desiccant 6. FIG. Thereafter, in the lower valve mechanism 4B, the outflow valve body portion 10B is opened by the fluid pressure, and the inflow valve body portion 11B is closed by the fluid pressure, so that the refrigerant flows from the refrigerant inflow / outflow hole 2B through the outflow valve port 7B. Leaks.

  On the other hand, even when the refrigerant flows in from the lower refrigerant inflow / outflow hole 2B, in the valve mechanism 4B, the inflow valve body portion 11B is opened by the fluid pressure, and the outflow valve body portion 10B is cooled by the valve seat 12B. Is prevented from passing through the outflow valve port 7B and flowing in the direction of flowing into the cylindrical body 5, so that the refrigerant flows into the cylindrical body 5 through the inflow valve port 8B. The moisture contained in the refrigerant is absorbed by the desiccant 6. Thereafter, in the upper valve mechanism 4A, the outflow valve body portion 10A is opened by the fluid pressure and the inflow valve body portion 11A is closed by the fluid pressure, so that the refrigerant flows from the refrigerant inflow / outflow hole 2A via the outflow valve port 7A. leak.

DESCRIPTION OF SYMBOLS 1 Refrigerant dryer 2 (2A, 2B) Refrigerant inflow / outflow hole 3 (3A, 3B) Cover body 4 (4A, 4B) Valve mechanism 5 Cylindrical body 6 Desiccant 7 (7A, 7B) Outflow valve port 8 (8A, 8B) Inflow valve port 9 (9A, 9B) Fixing base 9a Caulking portion 10 (10A, 10B) Outflow valve body portion 11 (11A, 11B) Inflow valve body portion 12 (12A, 12B) Valve seat 12a Base portion 12b Insertion hole 12c Stopper part 12d Hole part 13 (13A, 13B) Rivet 14 (14A, 14B) Support member 15 (15A, 15B) Valve body 15a Base part 15b Insertion hole 15c Connection part 16 (16A, 16B) Protection member 17 (17A) , 17B) Punching metal 18 (18A, 18B) Wire mesh 19 (19A, 19B) Welded part 20 (20A, 20B) Stopper part

Claims (5)

Two lids each having a refrigerant inflow / outflow hole;
A cylinder connecting each of the two lids;
A desiccant contained in the cylinder;
A fixing base provided in each of the lids, in which an outflow valve port and an inflow valve port are formed;
The fixing base is fixed to a surface opposite to the side facing the refrigerant inflow / outflow hole, and covers the outflow valve body portion for opening and closing the outflow valve port by the fluid pressure of the refrigerant and the inflow valve port. And a valve body having an inflow valve body portion that opens and closes the inflow valve port by the fluid pressure of the refrigerant,
When the refrigerant flows in from the refrigerant inflow / outflow hole, the outflow valve port of the outflow valve body portion is fixed to a surface of the fixing base opposite to the side facing the refrigerant outflow / inflow hole. A refrigerant dryer, comprising: a valve seat that restricts movement in the opening direction.   The fixed base is a stopper portion that restricts further movement of the outflow valve body portion in a direction of opening the outflow valve port beyond a predetermined open position when the refrigerant flows out of the refrigerant outflow / inflow hole. The refrigerant dryer according to claim 1, which is integrally provided.   The desiccant support member restricts the inflow valve body portion from further moving in a direction to open the inflow valve port beyond a predetermined open position when the refrigerant flows in from the refrigerant inflow / outflow hole. The refrigerant dryer according to claim 1, wherein:   The refrigerant dryer according to claim 1, 2 or 3, wherein the valve body and the valve seat are fixed to the fixing base by rivets.   The valve body and the valve seat have an insertion hole through which a protrusion formed integrally with the fixed base is inserted, and after the protrusion is inserted into the insertion hole, the protrusion is caulked. The refrigerant dryer according to claim 1, 2, or 3, wherein the valve body and the valve seat are fixed to the fixing base.

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