CN212179159U - Inflatable cap - Google Patents

Abstract

The utility model provides an aerify block relates to air conditioner technical field. The inflatable cap comprises a cap body, a core rod and a top cap, an inflation inlet is formed in the cap body, the core rod is arranged inside the cap body, a plugging portion is arranged at one end of the core rod, the other end of the core rod is connected with the top cap, and the top cap can move relative to the cap body to drive the core rod to move, so that the plugging portion opens or closes the inflation inlet. A cavity is formed between the top cover and the core rod, the top cover is provided with a through hole, one end of the through hole is communicated with the cavity, and the other end of the through hole extends to the outer wall of the top cover. The inflatable cap can reduce the influence on the accuracy of an air conditioner leakage detection result and improve the processing efficiency.

Description

Inflatable cap

Technical Field

The utility model relates to an air conditioner technical field particularly, relates to an aerify block.

Background

In the production and manufacturing process of the air conditioner, leakage detection needs to be carried out on an evaporator of an indoor unit so as to judge whether the evaporator can leak refrigerants or not. Usually, an inflation cap is installed at a joint on a refrigerant pipe of an evaporator, an inflation device such as an inflation gun is matched with the inflation cap to input helium with a certain pressure into the refrigerant pipe of the evaporator, the inflation device is removed after the helium is filled, and the inflation cap can be automatically closed. Then the evaporator with the inflatable cap is placed in a vacuum box and is tested by a helium mass spectrometer leak detector. If helium leakage is detected, the fact that the evaporator leaks is indicated, and the product is unqualified.

However, in the existing inflatable cap, a cavity is formed between the top cover and the core rod, helium is easily remained in the cavity when helium is filled into the evaporator, and the remained helium is gradually released in the vacuum box when the evaporator is subjected to leak detection, so that misjudgment is easily caused, the accuracy of a leak detection result is affected, and the process efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the problem of improvement is including how to improve the influence of aerifing the block in order to reduce the accuracy to air conditioner leak hunting result, improves processing procedure efficiency.

In order to improve the above problem, an embodiment of the present invention provides an inflation cap, including a cap body, a core rod and a top cap, wherein an inflation inlet is arranged in the cap body, the core rod is arranged inside the cap body, one end of the core rod is provided with a plugging portion, the other end of the core rod is connected with the top cap, and the top cap can move relative to the cap body to drive the core rod to move, so that the plugging portion opens or closes the inflation inlet; a cavity is formed between the top cover and the core rod, the top cover is provided with a through hole, one end of the through hole is communicated with the cavity, and the other end of the through hole extends to the outer wall of the top cover.

When the air conditioner is subjected to leakage detection, the top cover of the inflation cover cap is pressed to drive the plugging part on the core rod to move, and the inflation inlet is opened to fill helium. Because the inflatable cover cap is provided with the through hole communicated with the cavity between the ejector rod and the core rod on the top cover, the through hole extends to the outer wall of the top cover to penetrate through the top cover, when the evaporator is filled with helium, the helium entering the cavity can be discharged through the through hole instantly, the retention of the helium in the cavity is reduced, the influence on the accuracy of a follow-up leak detection result is reduced, and the processing efficiency is effectively improved.

In an optional embodiment, the top cover is provided with a mounting groove, one end of the core rod, which is far away from the blocking part, is inserted into the mounting groove, a cavity is formed between the end surface of the core rod and the wall of the mounting groove, and the through hole extends from the wall of the groove to the outer wall of the top cover.

The core rod is inserted into the mounting groove in the top cover, so that the core rod and the top cover are relatively fixed. Because the core rod and the top cover are assembled together, a cavity is easily formed between the core rod and the groove wall of the mounting groove, and the through hole in the top cover extends from the groove wall of the mounting groove to the outer wall of the top cover, so that the cavity is communicated with the outside, and the accumulation and the residue of helium in the cavity can be effectively reduced.

In an alternative embodiment, the through-hole extends from the bottom wall of the mounting groove to the outer wall of the top cover, the bottom wall being opposite the end face of the core rod.

The through hole is arranged on the groove wall, namely the bottom wall, on one side opposite to the end face of the core rod in the mounting groove, so that helium can be discharged more conveniently, and the influence on the strength of the top cover can be reduced as much as possible.

In an alternative embodiment, the top cover includes a ridge for mating with the inflator, the ridge providing a mounting groove, the ridge protruding away from the stem, the ridge providing a through hole.

The top cover is provided with the uplift portion so that the uplift portion can be matched with the inflation equipment, the inflation equipment presses the top cover, and the top cover drives the plugging portion on the core rod to move, so that the inflation inlet can be opened conveniently.

In an alternative embodiment, the inflation cap comprises an elastic member, one end of the elastic member is connected to the top cap, and the other end of the elastic member is connected to the cap body.

Be provided with the elastic component between top cap and the block body, the top cap removes in order to open the inflation inlet when the inflation equipment pressure moves the top cap, and the elastic component is compressed to support and hold in the top cap, exert the counter-force to the top cap, make the top cap have the trend of automatic rebound, when the inflation equipment no longer presses the top cap, the top cap drives the shutoff portion and moves back, thereby realizes the automatic shutoff to the inflation inlet.

In an alternative embodiment, the elastic member is a spring, and the spring is sleeved outside the core rod.

The elastic part adopts the spring, and the spring housing is established outside the core bar, conveniently leads to spring compression and resilience, and reduces the occupation space of elastic part.

In an optional embodiment, a first sealing ring is arranged at the inflation inlet in the cap body, the core rod penetrates through the first sealing ring, and when the inflation inlet is closed, the blocking part abuts against the first sealing ring.

The first sealing washer of shutoff portion butt when closing the inflation inlet can effectively promote the leakproofness of inflation inlet department, reduces revealing of evaporimeter leak hunting in-process helium, reduces the influence to the testing result accuracy.

In an alternative embodiment, a bushing is arranged in the cap body, and one end of the bushing abuts against the first sealing ring.

The first sealing ring is stably fixed in the cover cap body through the support of the lining, and the sealing performance of the first sealing ring is further effectively guaranteed.

In an alternative embodiment, the cap body is provided with a threaded portion for connection to an evaporator end fitting.

The block body is provided with screw thread portion, conveniently connects detachably with the evaporimeter and is connected.

In an alternative embodiment, a side of the threaded portion adjacent to the inflation port is provided with a second sealing ring for sealing a gap between the evaporator end fitting and the cap body.

When the evaporator joint is connected with the inflatable cap through the threaded portion, the second sealing ring effectively improves the sealing performance between the evaporator joint and the cap body, and prevents leakage of helium in the leakage detection process.

Drawings

FIG. 1 is a schematic structural view of an inflatable cap according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a cover body in an embodiment of the present invention;

FIG. 3 is a schematic view of the assembly of the top cap and the core rod according to the embodiment of the present invention;

fig. 4 is a schematic view of the top cover structure in the embodiment of the present invention.

Description of reference numerals: 100-inflating caps; 110-a cap body; 112-an inflation port; 114-a boss; 115-a first channel; 116-a second channel; 117-first seal ring; 118-a second seal ring; 119-a threaded portion; 120-convex ribs; 121-a bushing; 130-core rod; 132-a blocking part; 150-a top cover; 151-mounting grooves; 152-a cavity; 154-a through hole; 155-bump; 157-a guide; 170-elastic member.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

Referring to fig. 1 and 2, the present invention provides an inflatable cap 100, which includes a cap body 110, a core rod 130 and a top cover 150. A gas charging port 112 is provided in the cap body 110. The core rod 130 is disposed inside the cap body 110, one end of the core rod 130 is provided with a blocking part 132, and the other end of the core rod 130 is connected with the top cap 150. The top cap 150 can move relative to the cap body 110 to move the stem 130, so that the blocking portion 132 opens or closes the air inlet 112. A cavity 152 is formed between the top cover 150 and the core rod 130, the top cover 150 is provided with a through hole 154, one end of the through hole 154 is communicated with the cavity 152, and the other end extends to the outer wall of the top cover 150.

In the present embodiment, an air flow channel is provided in the cap body 110, and the air flow channel penetrates through both ends of the cap body 110. The inner wall of the cap body 110 is provided with a boss 114, and the boss 114 extends along the circumferential direction of the cap body 110 and protrudes inward in the radial direction. The boss 114 encloses the inflation port 112, the boss 114 divides the airflow channel inside the cap body 110 into a first channel 115 and a second channel 116, the inflation port 112 is located between the first channel 115 and the second channel 116, and the first channel 115 and the second channel 116 are communicated through the inflation port 112.

A first sealing ring 117 is disposed in the cap body 110 at the inflation port 112. The stem 130 passes through the first sealing ring 117, and when the inflation inlet 112 is closed, the blocking portion 132 abuts against the first sealing ring 117. Specifically, a first sealing ring 117 is fixed on one side of the boss 114 close to the second passage 116, and when the blocking portion 132 is close to the inflation inlet 112 to close the inflation inlet 112, the blocking portion 132 is tightly attached to the first sealing ring 117, and the first sealing ring 117 can improve the sealing performance of the inflation inlet 112 and prevent helium gas entering the second passage 116 from leaking from the inflation inlet 112. In this embodiment, the first sealing ring 117 includes a ring body and a rib 120 connected to the ring body and protruding toward the first passage 115, the rib 120 contacts with the inner circumferential surface of the boss 114, and the ring body contacts with the side surface of the boss 114 near the second passage 116, so that the contact area between the first sealing ring 117 and the boss 114 is increased to improve the sealing property.

In other embodiments, the first sealing ring 117 may be disposed on a side of the blocking portion 132 close to the boss 114, and when the blocking portion 132 is stopped at the gas filling opening 112, the first sealing ring 117 is sandwiched between the blocking portion 132 and the boss 114, so as to seal the gas filling opening 112.

The cap body 110 is provided with a threaded portion 119 for connecting an evaporator joint. Specifically, a threaded portion 119 is disposed at an end of the second channel 116 away from the boss 114, and in the present embodiment, the threaded portion 119 is an internal thread. When the inflatable cap 100 needs to be connected with the evaporator connector, the external thread on the evaporator connector is matched with the thread part 119, so that the detachable connection of the evaporator connector and the evaporator connector is realized, the assembly is convenient, and certain sealing performance is realized. The second sealing ring 118 is arranged on one side of the threaded portion 119 close to the inflation inlet 112, the second sealing ring 118 is used for sealing a gap between the evaporator joint and the cap body 110, and the second sealing ring 118 can further improve the connection sealing performance between the evaporator joint and the cap body 110, so that helium filled in the evaporator is prevented from leaking from the joint, and the accuracy of a leak detection result is prevented from being influenced. In this embodiment, a bushing 121 is disposed in the cap body 110, the bushing 121 is disposed in the second channel 116, one end of the bushing 121 abuts against the first sealing ring 117, and the other end abuts against the second sealing ring 118, so as to stably fix the first sealing ring 117 and the second sealing ring 118 in the cap body 110, thereby ensuring the sealing performance of the inflation inlet 112 and the joint of the inflatable cap 100 and the evaporator.

In other embodiments, the cap body 110 may also be connected to the evaporator in other connection manners such as clamping, but the connection sealing performance needs to be ensured to avoid affecting the judgment of the subsequent leak detection result.

Referring to fig. 1 and 3, the core pin 130 is capable of moving relative to the cap body 110. One end of the core pin 130 away from the blocking portion 132 passes through the first sealing ring 117 and the inflation port 112 to enter the first channel 115, and one end of the core pin 130 away from the blocking portion 132 is fixed to the top cap 150. Specifically, the stem 130 includes a stem and a blocking portion 132 connected to the stem, the stem passes through the first sealing member and the inflation port 112, the outer diameter of the blocking portion 132 is larger than the outer diameter of the stem, and the blocking portion 132 can be stopped by the boss 114 in the second channel 116. In order to improve the matching degree of the blocking portion 132 and the first sealing ring 117, the contact surface of the blocking portion 132 and the first sealing ring 117 is an arc surface, and the arc surface protrudes towards the direction close to the boss 114, so that the blocking portion 132 can better press the first sealing ring 117, and the blocking portion 132 and the first sealing ring 117 are matched more tightly to improve the sealing performance.

Referring to fig. 3 and 4, the top cover 150 is provided with an installation groove 151, and one end of the core rod 130 far from the blocking portion 132 is inserted into the installation groove 151, so that the top cover 150 and the core rod 130 are relatively fixed. In this embodiment, the top cover 150 includes a raised portion 155 for mating with an inflator, and a guide 157 attached around the raised portion 155. The ridge 155 is provided with a mounting groove 151, the ridge 155 protrudes in a direction away from the stem 130, and a circular outer wall is formed on a side of the ridge 155 away from the stem 130. The ridge 155 is provided with a through hole 154, and in the present embodiment, the through hole 154 has a circular cross section, and the through hole 154 extends to the circular outer wall in the axial direction of the core rod 130. To ensure smooth exhaust and avoid excessively affecting the strength of the top cover 150, the diameter of the circular outer wall is 3 to 4 times the diameter of the through-hole 154 in this embodiment.

When the inflatable cap 100 is connected to an inflator device, the inflator device engages the ridge 155 and the inflator device is able to depress the cap 150 such that the cap 150 moves the stem 130. In other embodiments, the ridge 155 may not be provided, and only the top cover 150 can be pressed by the inflator. In the present embodiment, only one through hole 154 is provided in the ridge portion 155, and in other embodiments, the number of the through holes 154 may be provided in plural.

The guide 157 is located in the first channel 115, the number of the guide 157 is multiple, the plurality of guides 157 are arranged at intervals along the circumferential direction of the bulge portion 155, one end of each guide 157 is connected to the bulge portion 155, and the other end of each guide 157 extends towards the direction close to the inner wall of the cap body 110, so that the outer side of each guide 157 is close to the inner wall of the cap body 110, and when the top cap 150 moves, the top cap 150 can only move along the axial direction of the cap body 110 due to the limitation of the guide 157 at the periphery.

Because the core rod 130 and the top cover 150 are assembled, when the core rod 130 is inserted into the mounting groove 151, a relatively closed space, i.e., the cavity 152, is easily formed in the mounting groove 151 after the assembly of the core rod 130 and the top cover 150 is completed because the insertion depth is not strictly required and the surface matching degree of the core rod 130 and the mounting groove 151 is not high. When helium gas is filled into the evaporator, since helium gas has a certain pressure, helium gas can enter the cavity 152 through the fitting gap between the core rod 130 and the fitting groove 151, and a certain amount of helium gas is easily collected in the cavity 152. If the helium in the cavity 152 can not be discharged in time, when the evaporimeter that will have the gas filled cap 100 after accomplishing to fill helium is put into the vacuum chamber and is carried out the leak hunting, because external pressure is less, remaining helium in the cavity 152 can slowly discharge through the assembly gap between core bar 130 and the mounting groove 151, once helium mass spectrometer leak detector detects there is the helium to reveal, can directly judge by mistake and reveal for the evaporimeter, and then report to the police, not only influence the leak hunting and judge, still influence processing procedure efficiency. In the present embodiment, the core pin 130 does not abut against the bottom of the mounting groove 151 of the top cap 150 during assembly, and a cavity 152 is formed between the end surface of the core pin 130 and the wall of the mounting groove 151, so that helium gas is easily collected, which may cause misjudgment during subsequent leak detection.

Thus, in the present embodiment, the top cover 150 is provided with a through hole 154 communicating with the cavity 152, and the through hole 154 extends from the groove wall to the outer wall of the top cover 150, at this time, the through hole 154 can directly communicate the cavity 152 with the outside. Helium gas entering the cavity 152 can be immediately exhausted through the through holes 154 without accumulating or remaining in the cavity 152 when the helium gas is charged into the evaporator. When the subsequent evaporator is placed in a vacuum box for leak detection, judgment of the air tightness of the evaporator cannot be hindered due to the release of helium in the cavity 152, the influence on leak detection of the evaporator is reduced, and the whole process efficiency is effectively improved.

Further, in the present embodiment, the through-hole 154 extends from the bottom wall of the mounting groove 151, which is opposite to the end surface of the stem 130, to the outer wall of the top cap 150. The through hole 154 is formed in the mounting groove 151 on a wall, i.e., a bottom wall, of a side opposite to the end surface of the core rod 130, so that helium gas can be more conveniently discharged, and the influence of the opening of the top cover 150 on the strength can be reduced as much as possible. In other embodiments, the through hole 154 may also be disposed on the circumferential side wall of the mounting groove 151, that is, the through hole 154 may also be disposed on the circumferential side of the raised portion 155, so that the helium gas entering the cavity 152 is discharged from the side portion of the top cover 150, only the helium gas is required to be discharged from the cavity 152 in time and the strength of the top cover 150 is ensured.

In other embodiments, the mounting groove 151 may also be disposed at an end of the core rod 130 away from the blocking portion 132, in which case the top cover 150 is provided with an insert, the insert is inserted into the mounting groove 151 to fix the top cover 150 and the core rod 130 relatively, and in which case a cavity 152 is also formed between the top cover 150 and the core rod 130.

In addition, to achieve the automatic closing of the inflation port 112, the inflation cap 100 includes an elastic member 170. The elastic member 170 has one end connected to the cap 150 and the other end connected to the cap body 110, and when the cap 150 moves relative to the cap body 110 to open the inflation opening 112, the elastic member 170 can abut against the cap 150, so that the cap 150 has a tendency to drive the blocking portion 132 to close the inflation opening 112.

Specifically, the elastic member 170 is a spring, and the spring is sleeved outside the core rod 130. The spring is located in the first channel 115 with one end attached to the top cover 150 and the other end attached to the boss 114. In the natural state of the spring, the spring supports the top cover 150, the top cover 150 is located on the side of the first channel 115 away from the boss 114, and the protrusion 155 extends out of the cap body 110 to facilitate connection with the inflator. At this time, the blocking portion 132 abuts against the first seal 117 and blocks the air inlet 112 to close the air inlet 112. When the inflation cap 100 is connected to an inflation device for inflation, the cap 150 is pressed by the inflation device, the cap 150 moves in a direction to approach the boss 114, and the spring is compressed. Stem 130 is fixed relative to cap 150 such that stem 130 and cap 150 move synchronously, such that blocking portion 132 of stem 130 moves away from first seal 117 or inflation port 112 and toward second seal 118, such that blocking portion 132 no longer blocks inflation port 112 and inflation port 112 is open. Helium gas may enter the second passageway 116 through the fill port 112 and then enter the refrigerant tube of the evaporator through the second passageway 116 and the evaporator connection in sequence.

After the helium filling is completed, the gas filling device is removed, the pressure power of the top cover 150 is lost, and the top cover 150 moves back towards the direction away from the boss 114 under the action of the spring restoring force, so that the blocking part 132 on the core rod 130 is driven to move towards the direction close to the gas filling port 112 until the blocking part 132 abuts against the first sealing ring 117, the gas filling port 112 is automatically closed and sealed, and the helium gas entering the evaporator cannot leak from the gas filling cap 100.

The spring is sleeved on the core rod 130 to better guide the compression and rebound of the spring so as to drive the top cover 150 to move along the axial direction of the core rod 130. It is understood that in other embodiments, the elastic member 170 may also be an elastic sheet, and the elastic member 170 is disposed on one side of the core rod 130, and has poor guiding performance, but can also drive the top cover 150 to move back by springing back to close the air charging opening 112.

The principle of operation of the inflatable cap 100 is as follows:

the air cap 100 is mounted on the evaporator joint and the air cap 100 is connected to the air charging apparatus. The top cover 150 is pressed by the inflator, the top cover 150 drives the blocking portion 132 of the stem 130 away from the first sealing ring 117, the charging port 112 is opened to charge helium gas into the evaporator, and the spring is compressed. Since the top cover 150 is provided with the through holes 154, helium gas introduced into the cavity 152 during helium filling can be directly discharged through the through holes 154 without being accumulated and remained in the cavity 152.

After the helium filling is completed and the gas filling equipment is removed, the pressure power of the top cover 150 is lost, the top cover 150 moves back under the restoring force of the spring, the blocking part 132 of the core rod 130 is driven to be close to and abut against the first sealing ring 117, the gas filling port 112 is blocked by the blocking part 132, and the gas filling port 112 is automatically closed.

The evaporator with the inflatable cap 100 is placed in a vacuum box for leak detection operation, helium gas cannot be leaked and released from the inflatable cap 100, and the leak detection result cannot be influenced and interfered.

In summary, the through hole 154 is disposed on the top cap 150 of the inflatable cap 100, so that the cavity 152 between the top cap 150 and the core rod 130 is communicated with the outside, and helium gas entering the cavity 152 can be discharged immediately without being collected or remaining in the cavity 152, thereby reducing the influence on the accuracy of the leak detection result of the evaporator and effectively improving the process efficiency.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention, and the scope of the present invention is defined by the appended claims.

Claims (10)

1. An inflation cap is characterized by comprising a cap body (110), a core rod (130) and a top cover (150), wherein an inflation inlet (112) is arranged in the cap body (110), the core rod (130) is arranged inside the cap body (110), one end of the core rod (130) is provided with a blocking part (132), the other end of the core rod (130) is connected with the top cover (150), and the top cover (150) can move relative to the cap body (110) to drive the core rod (130) to move, so that the blocking part (132) opens or closes the inflation inlet (112); a cavity (152) is formed between the top cover (150) and the core rod (130), a through hole (154) is formed in the top cover (150), one end of the through hole (154) is communicated with the cavity (152), and the other end of the through hole extends to the outer wall of the top cover (150).

2. The air inflation cap according to claim 1, characterized in that the top cover (150) is provided with an installation groove (151), one end of the core rod (130) far away from the blocking portion (132) is inserted into the installation groove (151), the cavity (152) is formed between the end surface of the core rod (130) and the groove wall of the installation groove (151), and the through hole (154) extends from the groove wall to the outer wall of the top cover (150).

3. The air cap according to claim 2, characterized in that the through hole (154) extends from a bottom wall of the mounting groove (151) to an outer wall of the top cap (150), the bottom wall being opposite to an end surface of the stem (130).

4. The inflatable cap according to claim 2, characterized in that the top cover (150) comprises a ridge (155) for cooperating with an inflatable device, the ridge (155) being provided with the mounting groove (151), the ridge (155) being convex in a direction away from the stem (130), the ridge (155) being provided with the through hole (154).

5. The inflation cap according to claim 1, characterized in that the inflation cap (100) comprises an elastic member (170), one end of the elastic member (170) is connected to the top cap (150), and the other end is connected to the cap body (110), when the top cap (150) moves relative to the cap body (110) to open the inflation port (112), the elastic member (170) can be abutted against the top cap (150), so that the top cap (150) has a tendency to drive the blocking portion (132) to close the inflation port (112).

6. The air inflation cap of claim 5, characterized in that the elastic member (170) is a spring, and the spring is sleeved outside the core rod (130).

7. The air inflation cap according to claim 1, characterized in that a first sealing ring (117) is arranged in the cap body (110) at the air inflation opening (112), the stem (130) penetrates through the first sealing ring (117), and the blocking portion (132) abuts against the first sealing ring (117) when the air inflation opening (112) is closed.

8. The air inflation cap of claim 7, characterized in that a bushing (121) is disposed in the cap body (110), and one end of the bushing (121) abuts against the first sealing ring (117).

9. The air inflation cap according to claim 1, characterized in that the cap body (110) is provided with a threaded portion (119) for connecting an evaporator joint.

10. The air inflation cap of claim 9, characterized in that a side of the threaded portion (119) adjacent to the air inflation port (112) is provided with a second sealing ring (118), the second sealing ring (118) being used to seal a gap between the evaporator end fitting and the cap body (110).

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