CN100420886C

CN100420886C - Temp expansion valve

Info

Publication number: CN100420886C
Application number: CNB2005100603743A
Authority: CN
Inventors: 裘浩明; 何旭东; 尹斌; 小池隆志
Original assignee: Zhejiang Sanhua Refrigeration Group Co Ltd
Current assignee: Zhejiang Sanhua Automotive Components Co Ltd
Priority date: 2005-08-12
Filing date: 2005-08-12
Publication date: 2008-09-24
Anticipated expiration: 2025-08-12
Also published as: CN1912432A

Abstract

An expansion valve with temperature sensing gas consists of gas box head set on valve body, pressure equalizing chamber and gas tight chamber on gas box head, filling hole being set on external wall of gas box head and being used for filling gas in, sealing head for sealing said filling hole. It is featured as setting said filling hole to be cylindrical form on external wall of gas box head and setting cylindrical edge on said sealing head, combining said sealing head with said filling hole by screw bolt to combine cylindrical opening of filling hole with said edge on sealing head.

Description

The temperature expansion valve

Technical field

The present invention relates to be applicable to the temperature expansion valve of air-conditioning system, especially be plugged in the filling the hole of gas tank portion (being also referred to as unit head) parts and temperature gas is sealed in structure in the sealed chamber with end socket.

Background technique

As the temperature expansion valve that is used for freeze cycle, as the flat 8-226567 of JP-, it comprises the high pressure coolant path of refrigerant inflow evaporator and the low pressure refrigerant path that refrigerant flows out from vaporizer, be provided with the valve hole part of valve opening in the way of above-mentioned high pressure refrigerant flow, by being toward or away from the valve opening of this valve body, thereby change the valve hole part of this valve opening aperture, come the diaphragm of actuating valve core components by the transmission bar for the action of control valve body, have the sealed chamber of the temperature gas of filling this diaphragm isolation and the pressure equalizing chamber that communicates with the low pressure refrigerant stream, be used for the gas tank portion that in valve body upper opening place, is provided with of gas phase refrigerant temperature of perception valve body, from hole that the outer wall that constitutes gas tank portion forms after sealed chamber is filled temperature gas, the structure of the end socket that the state lower seal of cinclides is used outside keeping filling.

Talked about for above-mentioned expansion valve, the hole on the outer wall seals by end socket, and therefore, reliably weld in end socket and hole, and, for do not allow end socket and hole around ponding, end socket and hole prevent that the corrosion of outer wall from becoming key after constituting.Relevant therewith, in the former temperature expansion valve,, be on the conical surface, to contact and the salient point weldering by end socket for the hole on the outer wall, limit the length of this welding, avoid ponding on the periphery that forms around the salient point weldering, need to use the coating anticorrosive material.

But in order to constitute the conical surface portion of welding usefulness, end socket forms jut and coniform portion, and simultaneously, the hole of outer wall is towards central direction, and oblique having a down dip forms periphery, so manufacturing procedure more complicated.And there is the possibility of ponding in the recess that forms on the periphery of protruding spot-welding part, in order to prevent ponding, prevents corrosion, must add rust resisting compound, so flow chart will increase.

Zao temperature expansion valve more as the flat 6-185833 of JP-, adopts the end socket of spherical shape, carries out the salient point weldering in the EDGE CONTACT portion with the edge part in the hole of outer wall, and the welding that then is second stage is that the electricity that the lip part that links to each other with end socket sphere portion carries out irons weldering.

Implement the old temperature expansion valve of the welding of this second stage, salient point is welded in the full Zhou Jinhang of sphere portion, and it is bigger to occur welding difficulty like this, the phenomenon of strength deficiency.

According to the above, may there be the problem of the structure more complicated of the hole of outer wall and end socket in former temperature expansion valve, in addition, former temperature expansion valve, the welding of outer cinclides and end socket must have welding process, may cause welding insufficient.

Summary of the invention

The technical assignment of the technical problem to be solved in the present invention and proposition provides a kind of easy inclosure end socket, and can prevent that moisture content from immersing the temperature expansion valve of sealed chamber.For this reason, the present invention is by the following technical solutions:

A kind of temperature expansion valve, it comprises:

A valve body is provided with the low pressure refrigerant stream of high pressure refrigerant flow for liquid phase refrigerant to be reduced pressure circulation, the circulation of air feed phase refrigerant and is arranged on described high pressure refrigerant flow valve opening midway on this valve body;

Away from near the valve hole part of described valve opening with the aperture that changes described valve opening;

One is configured in being used on the described valve body and controls the gas tank portion of described valve hole part action, this gas tank portion has the sealed chamber by the filling temperature gas of all pressing the chamber and being surrounded by barrier film and outer wall of being communicated with the low pressure refrigerant stream of isolating of barrier film, has the filled hole of filling temperature gas in described sealed chamber on the described outer wall;

Shutoff on described filled hole temperature gas is sealed in the end socket in the described sealed chamber;

It is characterized in that: described filled hole, on the outer wall of gas tank portion, be cylindric, described end socket has cylindrical blade of a sword portion, and above-mentioned end socket and filled hole screw togather simultaneously, and above-mentioned blade of a sword portion combines with the cylinder opening portion in filled hole.

In the specific implementation, can optionally adopt following additional (specifically) technical measures, to reach better effect.

The end face of the cylinder opening portion in described filled hole is plane, contacts combination with above-mentioned blade of a sword portion bottom plane.

The end face of the cylinder opening portion in described filled hole is sloping shape edge, forms the edge sealing with above-mentioned blade of a sword portion.

Temperature expansion valve of the present invention forms cylindric filled hole on the outer wall of gas tank portion, does not weld with the columned end socket of formation in this filled hole, but connect by screw-thread fit, therefore cancel welding process, prevented the immersion of moisture content, can not cause the increase of flow chart.

And it is supporting by screw-in version to fill hole and end socket, so can not cause problem because of the welding in end socket and hole, the blade of a sword portion of end socket and nose end plane contact combine, so can enclose reliably.

In addition, because the blade of a sword portion of end socket combines by the edge sealing means with the cylinder opening portion in hole, so can realize sealing reliably.

Below in conjunction with specification drawings and specific embodiments to the present invention to more detailed description.

Description of drawings

Fig. 1: the longitudinal section of a kind of mode of execution of temperature expansion valve of the present invention.

Fig. 2 A, 2B: the expansion longitudinal section at the main position of a kind of mode of execution of temperature expansion valve of the present invention, wherein Fig. 2 A is the explanatory drawing of end socket, Fig. 2 B is the explanatory drawing that end socket combines with the hole.

Fig. 3 A, 3B: other the expansion longitudinal section at main position of mode of execution of the temperature expansion valve among the present invention, wherein Fig. 3 A is the explanatory drawing of end socket, Fig. 3 B is the explanatory drawing that end socket combines with the hole.

Embodiment

Embodiment one:

Fig. 1 has described the valve integral body that air conditioner for motor vehicle etc. is arranged on temperature expansion valve in the freeze cycle.Its valve body 1 is provided with liquid cooling matchmaker's the high pressure refrigerant flow 2 of circulation input vaporizer and the low pressure refrigerant stream 3 that flows out from vaporizer, and the valve opening 4 that is made of the path throttle orifice is arranged in the way in the high pressure refrigerant flow 2.Therefore flow into the liquid coolant of high pressure refrigerant flow 2 from the liquid-storage container (not shown),, flow into path 21 by the smaller valve opening 4 disconnected thermal expansions of flow path area.The aperture portion of the refrigerant inflow side of above-mentioned valve opening 4 forms valve seat, and at this valve opening valve seat place, spherical valve hole part 5 contacts or leave the aperture that changes valve opening 4.Above-mentioned valve hole part 5 is supported by supporting base 7, between this supporting base 7 and the adjustment nut 8, by being suppressed to closing the valve direction by the pressure spring 9 of adjusting nut 8 supports.

Gas tank portion 10 is that valve body 1 upper end portion is used for the parts of perception gas phase refrigerant humidity, it comprises by transmitting bar 102 and drives the diaphragm of above-mentioned valve hole part 5 and filled the sealed chamber 12 of the temperature gas of being isolated by diaphragm and the pressure equalizing chamber 13 that communicates with low pressure refrigerant stream 2.

The outer wall 14 that diaphragm 6 its peripheral parts are configured gas tank portion 10 is clipped in the middle with lower wall 18, welds with weld part 19 simultaneously.Therefore, outer wall 14 forms sealed chamber 12 with diaphragm 6.Lower wall 18 screws togather (promptly by seal with screwed joint combine) with the opening portion on valve body 1 top by O shape circle 17 between between the valve body upper end.

The 101st, the transmission seat of diaphragm 6, work as the stopper of diaphragm 6 in its top, and its perimeter support is on lower wall 18.

Transmit the top of bar 102 and insert transmission seat 101 bottoms, the lower end of transmission bar 102 combines with spherical valve hole part 5.

Transmit the hole 11 that bar 102 inserts valve body 1, it is retainer ring that O shape circle 110,111 is housed in the hole 11, is used for preventing moving of O shape circle 110.

Form hole 15 on the outer wall 14 of formation gas tank portion 10, after filling temperature gas, seal by metal end enclosure 16 under the state that keeps finishing for outer cinclides 15 fillings to sealed chamber.

Therefore, the temperature of the gas phase refrigerant in the sealed chamber 12 perception low pressure refrigerant streams 3, sealed chamber 12 changes pressure along with the temperature of this gas phase refrigerant.On the one hand, the pressure equalizing chamber 13 that is arranged on the downstream side of diaphragm 6 makes above-mentioned low pressure refrigerant stream 3 and the equalization of pressure of the gas phase refrigerant of the low pressure refrigerant stream 3 that communicates with it, so diaphragm 6 comes displacement according to the difference of the pressure of sealed chamber 12 and pressure equalizing chamber 13, thereby this action is to pass to the aperture that valve hole part 5 comes control valve bore 4 by transmitting bar 102.

Among Fig. 2 A, the outer wall 14 of gas tank portion 10 is metal such as stainless structure, and it is cylindric 152 that the hole 15 on the outer wall 14 is, and this inside is provided with screw thread 151.The end face 153 at the initial position of cylindrical part 152 is processed into plane, and end socket 16 formation metals such as stainless steel are cylindrical, are provided with screw thread 161 in its outside, and on the top 162 of end socket 16, lip part forms blade of a sword portion 163.

Among Fig. 2 B, in end socket 16 patchholes 15, by the cooperation of screw thread 151 with screw thread 161, guiding, the screw thread 161 of end socket 16 is screwed with the screw thread 151 in hole 15.

The 163rd, the end face 153 that the header planes of the cylindrical part 152 in hole 15 processes and interplanar join and combine and form.End socket 16 is chimeric fixing with hole 15.

Therefore, temperature gas is filled the sealed chamber 12 of inlet box portion, along with the displacement of diaphragm 6, transmit bar 102 and be driven, valve hole part 5 is controlled, thus cold medium flux that just can the vaporizer (not shown) of control flows in high pressure refrigerant flow 2.

Temperature expansion valve among the present invention, hole 15 and end socket 16 combine by screwing togather, and, owing on the cylindrical part 152 in hole 15 opening portion 154 is set, the head of this opening portion has been processed into the plane of an end 153 by the plane and the blade of a sword portion 163 that forms on the head 162 of the cylindrical end socket 16 of combination therewith joins, can compare firm metallic seal, realize reliable sealing.

And, because the external diameter of the footpath of the blade of a sword portion 163 of end socket 16 and the cylindrical part 152 in hole 15 is much at one, can ponding, can reliably prevent the intrusion of moisture content.

Embodiment two:

Fig. 3 A and Fig. 3 B are the figure at main position of the another kind of mode of execution of the temperature expansion valve put down in writing among Fig. 1, main position among Fig. 2 is the end face difference of the opening portion that is provided with on the cylindrical part that forms on the outer wall 14, other structure is all the same, therefore representing with prosign of same part, description is omitted.

End socket 16 among Fig. 3 A is the same with end socket 16 among Fig. 2, and end socket 16 is supporting therewith by screwing togather; The end 155 of the head of the opening portion 154 that is provided with on the cylindrical part 153 among Fig. 3 B forms edge shape portion 156.As a result, among Fig. 3 B: end socket 16 screws togather with hole 15, and at this moment, the blade of a sword portion 163 of end socket 16 is made of with edge seal 157 the edge shape part 156 in hole 15, according to this edge seal 157, can seal reliably.And locking torque has been stipulated in this edge sealing, so edge seal 157 can correctly realize reliably.

As previously discussed, in the temperature expansion valve according to above-mentioned mode of execution, end socket and hole are come chimeric fixing by screwing togather.And, join between end socket and the hole, implement sealing reliably.

In addition, the blade of a sword portion of end socket and the external diameter cylindraceous in hole are basic identical, so ponding can not occur, are easy to just can to realize preventing the intrusion of moisture content.

And, because end socket and hole are that contact combination or edge seal on metal flat, so can reach reliable sealing by chimeric fixing.

As a result, the gas tank portion of the temperature-sensitive chamber that can seal reliably is housed, can prevents that moisture content from invading and correct control flow rate.

Claims

1. temperature expansion valve, it comprises:

2. temperature expansion valve according to claim 1 is characterized in that the end face of the cylinder opening portion in described filled hole is plane, contacts combination with above-mentioned blade of a sword portion bottom plane.

3. temperature expansion valve according to claim 1 is characterized in that the end face of the cylinder opening portion in described filled hole is sloping shape edge, forms the edge sealing with above-mentioned blade of a sword portion.