JP6434276B2 - Receiver dryer - Google Patents

Description

  The present invention relates to a receiver dryer for storing a refrigerant circulating in a refrigeration cycle and for separating and removing moisture in the refrigerant by gas-liquid separation.

  Conventionally, receiver dryers, accumulators, and the like have been used to store refrigerant circulating in the refrigeration cycle and to separate and remove moisture by gas-liquid separation. As this type of receiver dryer, for example, Patent Document 1 discloses a cylindrical tank body having a refrigerant inflow hole and a refrigerant outflow hole formed in a lower wall, and a concave step portion formed around the upper end opening of the refrigerant inflow hole. Discloses a receiver tank in which a filter layer composed of a mesh sheet and a fiber complex is disposed, and a dome-shaped strainer is fixed to the lower wall so as to close the upper portion of the refrigerant outflow hole.

Japanese Patent Laid-Open No. 2004-211921

  The receiver dryer shown in Patent Document 1 uses a mesh sheet and a filter layer that are mounted in the recessed step portion of the refrigerant inflow hole as a resistance layer that reduces the flow rate of the refrigerant by allowing the refrigerant to pass through the filter sheet. Since the mesh sheet, the filter layer, and the strainer that closes the refrigerant outflow hole are independent parts, it is necessary to assemble these parts individually on the lower wall of the cylindrical main body. A mesh sheet and a filter layer are sequentially fitted into the concave step of the refrigerant inflow hole, and a strainer is placed on the lower wall of the tank body so that the strainer is covered with the refrigerant outflow hole. Since it is necessary to cover the presser member and fix it to the lower wall, many assembly parts are required. The assembly parts from the respective assembled separately, the assembling operation also takes troublesome effort, there is a problem that causes an increase in production costs.

  Therefore, the present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a receiver dryer that can simplify the assembling work by reducing the number of parts to be assembled.

In order to achieve the above object, a receiver dryer according to the present invention includes a tank body including a bottomed cylindrical body that opens at one end, a header that seals the opening of the body, and a vertical direction in the header. And a strainer structure in which the strainer is insert-molded into a synthetic resin frame, and the strainer is provided with a strainer structure that is formed by inserting the strainer into a synthetic resin frame. The structure is attached to the refrigerant inflow hole and the refrigerant outflow hole that open in the header ,
The header includes a lower wall portion having a refrigerant inflow hole and a refrigerant outflow hole, and a cylindrical portion extending from the lower wall portion, the frame body includes a ring body for insert-molding the strainer, and the ring body. A cylindrical peripheral wall portion integrally formed from the periphery of the frame, and the peripheral wall portion of the frame body is inserted or press-fitted into the inner peripheral surface of the cylindrical portion of the header, and the frame body is engaged with the header. It is characterized in that engaging means for matching is provided .

  Moreover, the receiver dryer which concerns on this invention forms the latching nail | claw which can be elastically deformed in the said frame as said engaging means, and press-fits the surrounding wall part of the said frame to the internal peripheral surface of the cylindrical part of the said header. At this time, the locking claw is locked to a stepped portion formed on the inner peripheral surface of the refrigerant inflow hole.

  In the receiver dryer according to the present invention, a cylindrical portion having a diameter smaller than that of the refrigerant inflow hole is integrally formed in the frame body corresponding to the refrigerant inflow hole, and the locking claw is integrally formed at a distal end portion of the cylindrical portion. It is formed.

  Moreover, the receiver dryer according to the present invention is characterized in that the frame body is integrally formed with a cylindrical portion for filling a fluorescent agent that colors the refrigerant.

  According to the receiver dryer of the present invention, the number of parts to be assembled can be reduced by integrating the strainer that removes foreign matters in the refrigerant and the frame for fixing the strainer to the header. Moreover, since the operation | work conventionally integrated separately can be simultaneously performed only by incorporating the strainer structure which insert-molded the strainer in a header, an assembly | attachment operation | work is simplified.

  Further, according to the receiver dryer of the present invention, the strainer structure is held against the header by press-fitting the peripheral wall portion of the strainer structure into the inner peripheral surface of the cylindrical portion of the header, and the strainer structure to the header In conjunction with the press-fitting operation, the strainer claw of the strainer structure is locked to the step portion formed on the inner peripheral surface of the refrigerant outflow hole, so that the strainer structure can be fixed. That is, the trainer structure can be fixed with one touch by simply pushing the peripheral wall portion of the strainer structure into the cylindrical portion of the header, and the assembly work is also easy.

  Further, according to the receiver dryer of the present invention, the refrigerant flowing into the tank body from the refrigerant inflow hole flows into the trunk through the inside of the cylinder portion of the trainer structure from the refrigerant inflow hole. By allowing the refrigerant to pass through the pipe-shaped cylinder portion having a smaller diameter, the cylinder portion functions as a resistance portion that reduces the flow rate of the refrigerant.

  Further, according to the receiver dryer of the present invention, by integrally forming the cylinder portion for filling the trainer structure with the fluorescent agent that colors the refrigerant, it is possible to reduce the number of assembling parts, The refrigerant colored with the fluorescent agent can instantly recognize when the refrigerant leaks.

It is a longitudinal cross-sectional view of the receiver dryer which shows the Example of this invention. It is a bottom view of the header which shows the Example of this invention. It is an expanded sectional view of the strainer structure assembled | attached to the header which shows the Example of this invention. It is the sectional view on the AA line of FIG. 3 which shows the Example of this invention. It is sectional drawing to which the latching claw part which shows the Example of this invention was expanded. It is a bottom view of the latching claw shown in FIG. 5 which shows the Example of this invention.

  Hereinafter, a receiver dryer 1 according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the present invention, the vertical direction and the vertical direction indicate a positional relationship in the state shown in FIG. 1 and do not indicate an absolute positional relationship.

  1 to 6 show a receiver dryer 1 according to an embodiment of the present invention. As shown in FIG. 1, the receiver dryer 1 includes a tank body 2 including a body 3 and a header 4, and the tank body 2. It is comprised with built-in components, such as the desiccant filling layer 20 divided by the upper part inside.

  The tank body 2 includes a bottomed cylindrical body 3 having an open lower end, and a header 4 that is welded to the body 3 via a welded portion 10 and seals the opening end of the body 3. The body 3 and the header 4 are both made of a metal such as an aluminum alloy.

  The header 4 includes a circular lower wall portion 5 when viewed from the lower surface. The lower wall portion 5 is formed with a refrigerant inflow hole 6 and a refrigerant outflow hole 7 penetrating in the vertical direction. As shown in FIG. 3, the refrigerant inflow hole 6 and the refrigerant outflow hole 7 respectively form large diameter portions 6a and 7a and small diameter portions 6b and 7b that are continuous in the vertical direction, and the large diameter portions 6a and 7a. Is opened to the outside of the header 4, and the small diameter portions 6 b and 7 b are opened to the inside of the body 3. Further, the large-diameter portions 6a and 7a and the small-diameter portions 6b and 7b are made to continue in the vertical direction, thereby forming step portions 8 and 9 at the opening edges of the small-diameter portions 6b and 7b, respectively. The header 4 is formed by forging, and a cylindrical portion 5a is formed from the periphery of the lower wall portion 5. An opening of the body 3 is formed in a stepped portion 10a formed at the upper end edge of the cylindrical portion 5a. The body 3 and the header 4 are welded together by the welded portion 10 in a state where the ends are abutted.

  A strainer structure 26 is disposed inside the cylindrical portion 5 a so as to face the lower wall portion 5 of the header 4. The strainer structure 26 is formed by insert-molding a strainer 24 made of a stainless steel mesh member or the like covering the refrigerant outflow hole 7 into a synthetic resin frame 25. As shown in FIGS. 3 and 4, the frame body 25 includes a ring body 27 that insert-molds the strainer 24, a cross-shaped reinforcing rib 27 a that continuously connects the ring body 27, and a peripheral edge of the ring body 27. It is formed in a cap shape having a peripheral wall portion 28 that is integrally formed. Further, a cylindrical portion 30 is provided at the center of the reinforcing rib 27a for filling the fluorescent material 29 in which the fiber material is impregnated with the fluorescent dye, and is further provided at substantially the same position as the refrigerant inflow hole 6. A cylindrical portion 31 is projected. As shown in FIG. 4, the cylindrical portions 30 and 31 are connected in the center of the cylindrical portions 30 and 31 to form an 8-character shape as a whole. A plurality of notches 32 are formed in the fluorescent material filling cylinder 30, and a circular hole 33 is formed at the bottom of the cylinder 30. The refrigerant colored with the fluorescent agent 29 passes through the body 3.

  Further, the strainer structure 26 includes an engaging means 40 for engaging the header 4 with one touch. The engaging means 40 will be described in detail mainly with reference to FIGS. In the present embodiment, the engaging means 40 is specifically composed of a pair of left and right engaging claws 35, 35 integrally formed at the distal end portion of the cylindrical portion 31 formed at a position corresponding to the refrigerant inflow hole 6. ing. Hooks 35a and 35a that can be elastically deformed are formed at the tips of the locking claws 35, and the hooks 35a and 35a are locked to the stepped portion 8 formed in the refrigerant inflow hole 6 to thereby form a strainer structure. 26 is fixed to the header 4 by one touch. An inflow hole 36 corresponding to the refrigerant inflow hole 6 is formed inward of the cylindrical portion 31, and the refrigerant flowing into the tank body 2 from the refrigerant inflow hole 6 is transferred from the refrigerant inflow hole 6 to the inflow hole 36. The refrigerant flows through the cylindrical portion 31 having a smaller diameter than the small diameter portion 6 b of the refrigerant inflow hole 6 and flows into the body 3 from the inflow hole 36. In this way, by allowing the refrigerant to pass through the pipe-shaped cylinder portion 31 and the inflow hole 36 having a smaller diameter than the refrigerant inflow hole 6, the cylinder portion 31 functions as a resistance portion that reduces the flow rate of the refrigerant. And the refrigerant | coolant which flowed in in the tank main body 2 through the cylinder part 31 absorbed the water | moisture content in a refrigerant | coolant by the desiccant filling layer 20 divided by the upper part in the fuselage | body 3 in FIG. The gas-phase refrigerant flows out from the refrigerant outflow hole 7 after removing foreign matter by the strainer 24 of the strainer structure 26.

  The desiccant-filled layer 20 has a desiccant in a space section defined in the upper part of the body 3 by a porous pressing member 22 through a porous cushion layer 21 disposed in the upper part of the body 3. 20a is filled. An annular protrusion 23 is formed on the inner peripheral surface of the body 3 by notching, and the presser member 22 is engaged with the protrusion 23 to fix the presser member 22 inside the body 3. The desiccant-packed layer 20 that fills the upper space of the tank body 2 with the desiccant 20a is partitioned.

  In FIG. 2, reference numeral 45 denotes a female screw portion formed on the lower wall portion 5, and is used when the receiver dryer 1 is screwed when the receiver dryer 1 is used.

  In the present embodiment configured as described above, an assembling procedure of the strainer structure 26 will be described mainly with reference to FIGS. 3 and 5. First, the cylindrical portion 30 of the strainer structure 26 is filled with a fluorescent agent 29 in which a fiber material is impregnated with a fluorescent dye, and in this state, the distal ends of the locking claws 35 and 35 of the strainer structure 26 are used as a refrigerant in the lower wall portion 5. The peripheral wall portion 28 of the strainer structure 26 is inserted or pressed into the cylindrical portion 5 a of the header 4 so as to be pushed into the inflow hole 6. As a result, the tips of the tapered hooks 35a, 35a formed at the tips of the locking claws 35, 35 reach the periphery of the opening of the small diameter portion 6b of the refrigerant inflow hole 6 for the pushing operation of the strainer structure 26. In conjunction with this, the locking claws 35, 35 are elastically deformed so as to fall inward along the inclination of the hooks 35a, 35a. When the hooks 35a, 35a come out of the small diameter portion 6b of the refrigerant inflow hole 6, the locking claws 35, 35 are elastically restored, and the hooks 35a, 35a are formed at the opening edge of the small diameter portion 6b of the refrigerant inflow hole 6. Locked to the stepped portion 8. As a result, the hook 35a is retained by the lower wall portion 5 of the header 4 in a state where the peripheral wall portion 28 of the strainer structure 26 is press-fitted into the cylindrical portion 5a of the header 4. After the strainer structure 26 is fixed to the header 4 in this way, the cylindrical portion 5 a of the header 4 and the body 3 are welded together by the welded portion 10.

As described above, according to the present embodiment, the strainer 24 that removes foreign matters in the refrigerant is integrated with the strainer structure 26 by insert molding, and the strainer structure 26 has a resistance portion and a function that reduce the flow rate of the refrigerant. By integrally forming the cylindrical portion 31 and the fluorescent agent-filling cylindrical portion 30, the number of parts to be assembled can be reduced, and the strainer structure 26 can be simply assembled into the cylindrical portion 5 a of the header 4 in the assembling work of the strainer structure 26. The hooks 35a and 35a formed on the locking claws 35 and 35 are locked to the stepped portion 8 formed on the opening edge of the refrigerant inflow hole 6 by pressing the peripheral wall portion 28 of the It can be fixed with one touch, and the parts cost and production cost can be kept low by reducing the number of parts and simplifying the assembly work.

  Further, a strainer structure 26 made of a synthetic resin is formed from the welded portion 10 by forming the cylindrical portion 5a to extend from the peripheral edge of the header 4 and welding the upper end of the cylindrical portion 5a to the body 3 by the welded portion 10. The heat at the time of welding becomes difficult to be transmitted to the strainer structure 26, and the adverse effect of the strainer structure 26 due to heat can be suppressed.

As mentioned above, although the optimal one Example of this invention was explained in full detail, this invention is not limited to the said Example, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, in the above embodiment, the engaging claw 35 is provided on the strainer structure 26 as the engaging means 40, and the engaging claw 35 is engaged with the step portion 8 of the header 4 to fix the strainer structure 26. However, for example, similarly to the presser member 22 of the desiccant-filled layer 20, the cylindrical portion 5a of the header 4 is notched to form a protruding portion that protrudes inward, and the peripheral wall portion 28 of the strainer structure 26. The strainer structure 26 may be fixed by forming an annular recess in the inner surface and engaging the protrusion of the header 4 with the annular recess of the strainer structure 26 by pushing the strainer structure 26. Any structure may be used as long as the strainer structure 26 can be fixed to the header 4 with one touch. Further, the basic structure of the receiver dryer 1 is not limited to the above embodiment, and can be applied to various receiver dryers 1.

DESCRIPTION OF SYMBOLS 1 Receiver dryer 2 Tank main body 3 Body 4 Header 5 Lower wall part 5a Cylindrical part 6 Refrigerant inflow hole 7 Refrigerant outflow hole 9 Step part 10 Welded part 24 Strainer 25 Frame body 26 Strainer structure 27 Ring body 28 Circumferential wall part 29 Fluorescent agent 30 31 Cylinder 35 Locking claw 40 Engagement means

Claims (4)

A tank body comprising a bottomed cylindrical body that opens at one end, a header that seals the opening of the body, a refrigerant inflow hole and a refrigerant outflow hole that open in the header, and a strainer that covers the refrigerant outflow hole A receiver dryer with
A strainer structure in which the strainer is insert-molded in a synthetic resin frame, and the strainer structure is attached to the refrigerant inflow hole and the refrigerant outflow hole that open in the header ;
The header includes a lower wall portion having a refrigerant inflow hole and a refrigerant outflow hole, and a cylindrical portion extending from the lower wall portion, the frame body includes a ring body for insert-molding the strainer, and the ring body. A cylindrical peripheral wall portion integrally formed from the periphery of the
A receiver dryer comprising an engaging means for inserting or press-fitting a peripheral wall portion of the frame body into an inner peripheral surface of a cylindrical portion of the header and engaging the frame body with the header . A locking claw that is elastically deformable is formed on the frame body as the engaging means, and when the peripheral wall portion of the frame body is press-fitted into the inner peripheral surface of the cylindrical portion of the header, the locking claw is inserted into the coolant inlet hole. The receiver dryer according to claim 1 , wherein the receiver dryer is locked to a step portion formed on the inner peripheral surface of the receiver. Formed integrally smaller diameter cylindrical portion from the refrigerant inlet in response to the refrigerant inflow hole in the frame, characterized in that integrally forming the locking claw at the distal end of the cylindrical portion according to claim 2 The receiver dryer described in 1. The receiver dryer according to any one of claims 1 to 3 , wherein a cylindrical portion for filling a fluorescent material for coloring a refrigerant is integrally formed in the frame body.

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