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JP-7856775-B2 - Refrigerant recovery system ventilation structure

JP7856775B2JP 7856775 B2JP7856775 B2JP 7856775B2JP-7856775-B2

Inventors

  • 蒋 友▲栄▼

Assignees

  • 浙江飛越机電有限公司

Dates

Publication Date
20260511
Application Date
20240104
Priority Date
20231113

Claims (10)

  1. A refrigerant recovery device ventilation structure, wherein the refrigerant recovery device ventilation structure is A valve seat (1) with stomata, A valve body that acts axially with respect to the aforementioned stomata, A compression spring fitted to the outside of the valve body, The valve seat (1) includes a protective unit, The refrigerant recovery device ventilation structure is characterized in that the protective unit comprises an annular wall surrounding the compression spring, the compression spring and the valve seat (1) are at a predetermined distance from each other, and the region of the protective unit located between the compression spring and the valve seat (1) forms a radial ventilation passage.
  2. The refrigerant recovery device ventilation structure according to claim 1, characterized in that the protective unit includes a guide portion that guides the intermediate portion of the valve body, and the compression spring is positioned further away from the pore than the guide portion.
  3. The refrigerant recovery device ventilation structure includes an intake structure, and the intake structure is The valve seat (1) has an intake hole (11) and An intake valve body (2) that operates axially with respect to the intake port (11), A contact unit attached to one end of the intake valve body (2) away from the intake hole (11), The intake protection unit (6) provided on the valve seat (1), The intake valve body (2) is fitted externally and includes an intake spring (7) that contacts the intake protection unit (6) and the contact unit, respectively. The refrigerant recovery device ventilation structure according to claim 1 or 2, wherein the intake protection unit (6) comprises an intake annular wall (621) surrounding the intake spring (7), the intake spring (7) and the valve seat (1) are at a predetermined distance from each other, and the region of the intake protection unit (6) located between the intake spring (7) and the valve seat (1) forms an intake passage.
  4. The axial projections of the contact unit and the intake protection unit (6) overlap at least partially, thereby limiting the degree of compression of the intake spring (7). The refrigerant recovery device ventilation structure according to claim 3, characterized in that a position limiting groove (51) is provided on the surface of the contact unit facing the valve seat (1), and one end of the intake spring (7) engages with the position limiting groove (51).
  5. The intake protection unit (6) is further formed with a guide slope (622), a position limiting portion (623), a support portion (624), and an intake guide portion (625) that guides the intake valve body (2), the intake spring (7) is in contact with the support portion (624), and the position limiting portion (623) restricts the radial direction of the intake spring (7), The radial gap between the intake annular wall (621) and the intake spring (7) is smaller than the radial gap between the intake spring (7) and the intake valve body (2). The refrigerant recovery device ventilation structure according to claim 3, characterized in that the upper end of the intake annular wall (621) extends radially outward to form a convex ring (626).
  6. The refrigerant recovery device ventilation structure according to claim 5, wherein the intake protection unit (6) includes a fixedly connected holder (61) and a spring seat (62), the holder (61) is attached to the valve seat (1), the intake annular wall (621) is formed on the spring seat (62), and the holder (61) is hollow and forms the intake passage.
  7. The holder (61) includes a first annular portion (611), a second annular portion (612), and a plurality of columnar portions (613) between them, the space between the plurality of columnar portions (613) forms the intake passage, an annular projection (12) is formed in the intake hole (11) of the valve seat (1), the first annular portion (611) is fitted onto the outside of the annular projection (12), the diameter of the outer circle formed from the plurality of columnar portions (613) is smaller than that of the first annular portion (611), forming a step, The refrigerant recovery device ventilation structure according to claim 6, characterized in that a ring groove (13) is further formed on the outside of the annular projection (12) of the valve seat (1), and the height of the first annular portion (611) matches the depth of the ring groove (13).
  8. The lower end of the spring seat (62) is formed with the intake guide portion (625), the intake guide portion (625) is inserted into the second annular portion (612), the intake guide portion (625) and the intake valve body (2) are fitted together, and the second annular portion (612) supports the spring seat (62). The intake spring (7) is a cylindrical spring, The refrigerant recovery device ventilation structure according to claim 7, wherein the contact unit includes a first elastic component (3), a second elastic component (4), and a top ring (5), and the top ring (5) has a position limiting groove (51) that engages with one end of the intake spring (7).
  9. The refrigerant recovery device ventilation structure includes an exhaust structure, and the exhaust structure is The valve seat (1) having an exhaust port (14) opened, An exhaust valve body (2A) that operates axially with respect to the exhaust port (14), An exhaust protection unit (6A) is provided on the valve seat (1) and includes an exhaust guide section that guides the exhaust valve body (2A), The exhaust valve body (2A) is fitted to the outside of the exhaust spring (7A) and contacts the exhaust protection unit (6A) and the exhaust valve body (2A), respectively. The refrigerant recovery device ventilation structure according to claim 1 or 2, characterized in that the exhaust protection unit (6A) comprises an exhaust annular wall surrounding the exhaust spring (7A), the exhaust spring (7A) and the valve seat (1) are at a predetermined distance from each other, and the region of the exhaust protection unit (6A) located between the exhaust spring (7A) and the valve seat (1) forms an exhaust passage.
  10. The exhaust protection unit (6A) includes an exhaust protection cover (63) and a positioning pin (64), the positioning pin (64) fixing the exhaust protection cover (63) to the valve seat (1), and one end of the exhaust protection cover (63) that approaches the exhaust hole (14) is hollow and forms the exhaust passage. The refrigerant recovery device ventilation structure according to claim 9, characterized in that the exhaust protection cover (63) comprises a cylindrical portion (631), a reinforcing portion (632), and an opening portion (633), one end of the exhaust spring (7A) abuts against the cylindrical portion (631), the cylindrical portion (631) forms the exhaust annular wall, and the cylindrical portion (631) and the exhaust valve body (2A) are fitted together.

Description

This invention belongs to the technical field of refrigerant recovery, and more specifically, relates to a ventilation structure for a refrigerant recovery system. The Chinese utility model, authorized publication number CN217422205U, discloses a refrigerant recovery device intake valve, comprising: a valve seat with an intake port; a valve body axially movably mounted in the intake port, the valve body having a mounting groove at one end away from the intake port; a first elastic component mounted in the mounting groove; a second elastic component in contact with the first elastic component; a flat washer in contact with the circular component; and compression springs in contact with the valve seat and the flat washer, respectively. In this utility model, an additional elastic component is added, which deforms to absorb some energy, thereby reducing the force on the first elastic component and making it less prone to breakage and loosening. However, the solution described in the above utility model has several further shortcomings, namely, 1. The liquid coolant in the airflow causes a radial impact on the spring, causing it to deform. In this case, reciprocating motion increases the risk of spring breakage. 2. The spring stroke is not limited, and the greater the load, the greater the spring stroke, leading to insufficient fatigue resistance and ultimately spring breakage. 3. When using a conical spring, as the pitch decreases during the spring compression process, the amount of air intake at the valve seat intake also decreases. Additionally, the gap between the conical spring and the valve body becomes larger, resulting in a large radial skew of the conical spring. 4. After the spring breaks, the valve body loses its spring-guided motion. Due to the excessively long stroke, the valve body deforms, causing the valve rod and valve seat to collide. After multiple collisions, the valve body deforms, rendering the entire ventilation structure inoperable. As a result, the compressor stops working. Furthermore, the exhaust valve of the refrigerant recovery unit also has a similar defect, namely, 1. The liquid coolant causes radial impact on the spring; 2. It does not guide the valve body, or the guiding effect is poor, or the guiding effect is difficult to guarantee; 3. After the spring breaks, the broken spring wire enters the internal passage, affecting the compressor's lifespan. Chinese Utility Model CN217422205U This is a schematic diagram of the three-dimensional structure of the intake structure of the refrigerant recovery device ventilation structure according to Embodiment 1 of the present invention.This is a cross-sectional view of the intake structure of the refrigerant recovery device ventilation structure according to Embodiment 1 of the present invention.This is an exploded view of the intake structure of the refrigerant recovery device ventilation structure according to Embodiment 1 of the present invention.This is a schematic diagram of the valve seat structure of the intake structure of the refrigerant recovery device ventilation structure according to Embodiment 1 of the present invention.This is a schematic diagram of the valve body structure of the intake structure of the refrigerant recovery device ventilation structure according to Embodiment 1 of the present invention.This is a schematic diagram of the structure of the holder of the protective unit for the intake structure of the refrigerant recovery device ventilation structure according to Embodiment 1 of the present invention.Figures 7 and 8 are schematic diagrams of the spring seat of the protective unit of the intake structure of the refrigerant recovery device ventilation structure of Embodiment 1 of the present invention, viewed from different angles.Figures 7 and 8 are schematic diagrams of the spring seat of the protective unit of the intake structure of the refrigerant recovery device ventilation structure of Embodiment 1 of the present invention, viewed from different angles.This is a cross-sectional view of the intake structure of the refrigerant recovery device ventilation structure according to Embodiment 1 of the present invention (the cylinder head is further shown in Figure 2).This is a schematic diagram of the three-dimensional structure of the exhaust structure of the refrigerant recovery device ventilation structure according to Embodiment 1 of the present invention.This is a cross-sectional view of the exhaust structure of the refrigerant recovery device ventilation structure according to Embodiment 1 of the present invention.This is an exploded view of the exhaust structure of the refrigerant recovery device ventilation structure according to Embodiment 1 of the present invention.This is a schematic diagram of the structure of the exhaust protection cover of the exhaust structure of the refrigerant recovery device ventilation structure according to Embodiment 1 of the present invention.This is a cross-sectional view o