CN103075565B - A kind of heating power expansion valve assembly method - Google Patents
A kind of heating power expansion valve assembly method Download PDFInfo
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- CN103075565B CN103075565B CN201110330144.XA CN201110330144A CN103075565B CN 103075565 B CN103075565 B CN 103075565B CN 201110330144 A CN201110330144 A CN 201110330144A CN 103075565 B CN103075565 B CN 103075565B
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- heating power
- expansion valve
- power expansion
- driver blade
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Abstract
The invention discloses a kind of heating power expansion valve assembly method, including step 11: keep described spool to be closed, between described driver blade and valve body top, put the thickness standard cushion block equal to spool maximum opening；Step 12: described regulating part is installed on described driver blade, and the relative position of described regulating part and driver blade is adjusted along the moving direction of described driver blade；Step 13: when the top of described drive link coordinates with the lower end in contact of described regulating part, and when described driver blade is fitted with described standard cushion block completely, take out described standard cushion block.The impact of diaphragm can be down to minimum degree by manufacturing and positioning errors by this heating power expansion valve assembly method, and when its spool is fully closed, diaphragm present position has higher concordance, greatly improves the service behaviour of heating power expansion valve.
Description
Technical field
The present invention relates to refrigeration technology field, particularly to being used for freezing, the use occasion such as air-conditioning, heat pump
The heating power expansion valve method that carries out assembling.
Background technology
Heating power expansion valve be composition refrigerating plant vitals, be refrigeration system basic equipment it
One.It carrys out opening of control valve by the degree of superheat of evaporator outlet or compressor suction casing in sensing refrigeration system
Degree size, thus realize the effect of system refrigerant Flow-rate adjustment and reducing pressure by regulating flow.
Refer to Fig. 1, Fig. 2, Fig. 1 is the structural representation of a kind of typical heating power expansion valve in prior art
Figure；Fig. 2 is the close-up schematic view of aminoacyl site in Fig. 1.
As it can be seen, the heating power expansion valve of this structure mainly by valve body 1, valve port 2, air tank head 3, spool 4,
Spool fairlead 5, regulation spring 6, the regulation parts such as parts 7, spring base 8 are constituted.
When specifically assembling, first the valve port 2 being equipped with solder is pressed in valve body 1, carries out continuous tunnel furnace weldering；Then
Assemble the parts such as spool fairlead 5, spool 4, collar 9 successively；Then drive link 10, driver blade are loaded
11；The parts such as diaphragm 12, air tank head 3 are finally installed and weld.
Wherein, above valve port 2, it is machined with the conical surface, to ensure that runner is unimpeded；Drive link 10 is micro-with valve body 1
Small-gap suture coordinates, and transmission can guarantee that again sealing；Contact with driver blade 11 above drive link 10, lower section
Contact with spool 4；Air tank head 3 is separated into upper chamber a and lower chambers b by diaphragm 12；Temperature-sensitive bag 13 is felt
By the temperature of evaporator outlet, its internal pressure is conducted to air tank head 3 upper chamber a by capillary tube 14；
Outlet turns on by via 15 with air tank head 3 cavity of resorption b, i.e. evaporator inlet pressure conduction is to air tank head
3 cavity of resorption b.
Spool 4 is press-fitted into valve body 1 together with spool fairlead 5, and spool fairlead 5 is little with valve body 1 inwall
Interference fit, positions with collar 9 below spool fairlead 5；Arc surface is made in spool 4 bottom, with spool
Support seat 16 to coordinate；Regulation spring 6 positions by spool support seat 16 and spring base 8, and regulation parts 7 revolve
When turning, spring base 8 moves up and down to regulate the decrement of spring 6, thus it is static to arrange dispatching from the factory of expansion valve
The degree of superheat.
During work, the high-pressure fluid carrying out condenser enters from inlet tube, leads to from outlet after reducing pressure by regulating flow
Vaporizer, the foundation of its regulatory function is on the basis of dynamic balance, and concrete regulation process is as follows:
Temperature-sensitive bag 13 is connected by capillary tube 14 with diaphragm 12 top, experiences evaporator outlet cold-producing medium temperature
Degree, i.e. diaphragm 12 top is by the pressure effect of working medium in temperature-sensitive degree bag 13, and diaphragm 12 bottom is by vaporizer
Outlet pressure and the pressure effect regulating spring 6, diaphragm 12 is under the effect of three power, up or down
Heave, so that the opening of valve turns down or opens greatly, reach to regulate the purpose of vaporizer liquid supply rate.
When entering the liquid measure of vaporizer less than when needing of vaporizer thermic load, the then mistake of evaporator outlet steam
Temperature increases, and the pressure above diaphragm 12, more than the pressure of lower section, thus forces diaphragm to bloat downwards,
By driver blade 11, drive link 10, spool 4 compression adjustment spring 6, make between spool 4 and valve port 2
Opening become big, then liquid supply rate increases；Otherwise, when liquid supply rate is more than when needing of vaporizer thermic load, then
At evaporator outlet, the degree of superheat of steam reduces, and the pressure in temperature-sensitive bag 13 reduces, the work above diaphragm 12
When being firmly less than the active force of lower section, diaphragm 12 upwards bloats, and regulation spring 6 extends, and spool 4 moves
Make opening diminish, the liquid supply rate of vaporizer is reduced the most therewith.
Owing to during work, diaphragm 12 by air tank head 3 upper and lower cavity pressure and regulates spring 6 elastic force effect, diaphragm
12 promote spool 4 to move up and down the flow of regulation valve by driver blade 11, drive link 10, thus driver blade
Above in the of 11, the tolerance to the distance (being designated as size A, see Fig. 2) at valve port 2 sealing will strictly control.
And the valve port end face of existing heating power expansion valve ensures by machining accuracy completely to the size of driver blade upper end,
Due to valve port 2 be press-fitted the degree of depth (size a), drive link 10 length (size b), spool 4 size (size c) with
And driver blade 11 thickness (tolerance of size d) equidimension, especially continuous tunnel furnace postwelding valve port 2 are press-fitted the degree of depth (chi
Very little a) more difficult control, accumulates the error in size A relatively greatly, causes spool 4 to be in entirely after they assemblings
During off status, diaphragm 12 present position is inconsistent, thus affects the service behaviour of valve.
Therefore, the error produced in heating power expansion valve processing and the assembling impact on diaphragm how is reduced, it is ensured that
When spool is fully closed, diaphragm present position has higher concordance, thus improves the workability of heating power expansion valve
Can, it is that those skilled in the art are presently required and solve the technical problem that.
Summary of the invention
It is an object of the invention to provide a kind of heating power expansion valve assembly method.The method can be by processing and assembling
The impact of diaphragm is down to minimum degree by error, and when its spool is fully closed, diaphragm present position has higher one
Cause property, greatly improves the service behaviour of heating power expansion valve.
For achieving the above object, the present invention also provides for a kind of heating power expansion valve assembly method, is used for assembling heat
Power expansion valve, described heating power expansion valve includes driver blade, valve body and is positioned at the drive link in described valve body
And spool, described spool top coordinates with end in contact under described drive link, and described driver blade is provided with and moves along it
The adjustable regulating part in dynamic position, direction, the top of described drive link coordinates with the lower end in contact of described regulating part；
Including driver blade installation procedure, this operation comprises the following steps:
Step 11: keep described spool to be closed, put between described driver blade and valve body top
One thickness is equal to the standard cushion block of spool maximum opening；
Step 12, is installed on described driver blade by described regulating part, and along the moving direction of described driver blade
Adjust the relative position of described regulating part and driver blade；
Step 13: when the top of described drive link coordinates with the lower end in contact of described regulating part, and described biography
When moving plate is fitted with described standard cushion block completely, take out described standard cushion block.
Preferably, described driver blade offers and the endoporus of described drive link concentric, and described regulating part is pacified
It is loaded in described endoporus.
Preferably, described regulating part is tapered plug, and described endoporus is the bigger diameter end taper hole towards described drive link；
Described tapered plug is consistent with the cone angle of taper hole and interference fit.
Preferably, described regulating part is plunger, and described endoporus is circular hole；Described plunger and circular hole mistake
It is full of cooperation.
Preferably, described regulating part is screw rod, and described endoporus is screw；Described screw rod and screw pass through spiral shell
Stricture of vagina parafacies coordinates.
Preferably, it is provided with anti-loose structure between described screw rod and screw.
Preferably, described regulating part is the outer circumference surface adjusting lever with barb-shaped projection, and described endoporus is
Circular hole；Described adjusting lever wedge described circular hole and with described circular hole interference fit, its wedging end with described
The upper end of drive link is relative.
Preferably, described barb-shaped number of projection is multiple, along described adjusting lever axial distribution, each institute
The height stating barb-shaped projection increases to the other end successively from wedging end.
Preferably, described drive link and spool are integral type structure.
Preferably, the height of described barb-shaped projection increases to the other end successively from wedging end.
Heating power expansion valve provided by the present invention has done further improvement on the basis of existing technology, and it passes
Moving plate is provided with and is moved along it the adjustable regulating part in position, direction, the top of described drive link and described regulating part
Lower end in contact coordinate.So, regulating part can be changed on driver blade by standard cushion block when assembling
Position, i.e. adjusts the relative position of driver blade and drive link, thus during eliminating assembling, accumulation is to valve port
End face is to the error of distance (i.e. size A) above driver blade, and when its spool is fully closed, diaphragm present position is only
Determined by standard pad thickness and driver blade thickness rather than determined by size A, due to standard cushion block and
The scale error of driver blade is easily controllable, and its range of error is less, and therefore the impact on diaphragm can be down to
Low degree such that it is able to ensure that when spool is fully closed, the concordance of diaphragm position is consistent with spool maximum opening
Property, improve diaphragm life-span and the service behaviour of valve.
On the other hand, due to when spool is fully closed diaphragm present position only thick by standard pad thickness and driver blade
Degree determines, therefore can relax the matching requirements of other operation when assembling, and only control and regulation part is relative to biography
The fitted position of moving plate, thus reduce cost.
Heating power expansion valve provided by the present invention have employed above-mentioned heating power expansion valve assembly method, due to above-mentioned
Heating power expansion valve has above-mentioned technique effect, also should have for manufacturing the assembly method of described heating power expansion valve
Standby corresponding technique effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of typical heating power expansion valve in prior art；
Fig. 2 is the close-up schematic view of aminoacyl site in Fig. 1；
Fig. 3 is the structural representation of the first detailed description of the invention of heating power expansion valve provided by the present invention；
Fig. 4 is the close-up schematic view at B position in Fig. 3；
Fig. 5 is the Longitudinal cross section schematic of tapered plug shown in Fig. 4；
Fig. 6 is the structural representation of the second detailed description of the invention of heating power expansion valve provided by the present invention；
Fig. 7 is the close-up schematic view at C position in Fig. 6；
Fig. 8 is the top view of screw rod shown in Fig. 7；
Fig. 9 is the axonometric chart of screw rod shown in Fig. 7；
Figure 10 is the structural representation of the 3rd detailed description of the invention of heating power expansion valve provided by the present invention；
Figure 11 is the close-up schematic view at D position in Figure 10；
Figure 12 is the structural representation of the wedging driver blade of adjusting lever shown in Figure 11.
In figure:
1. valve body 2. valve port 3. air tank head 4. spool 5. spool fairlead 6. regulates spring
7. regulation parts 8. spring base 9. collar 10. drive link 11. driver blade 11-1. taper hole
11-2. screw 11-3. circular hole 12. diaphragm 13. temperature-sensitive bag 14. capillary tube 15. via
16. spools support seat 17-1. tapered plug 17-2. screw rod 17-3. adjusting lever 18. standard cushion block
Detailed description of the invention
The core of the present invention is to provide a kind of heating power expansion valve.The manufacturing and positioning errors of this heating power expansion valve
Minimum degree is down in impact on diaphragm, and when its spool is fully closed, diaphragm present position has higher concordance,
Greatly improve the service behaviour of heating power expansion valve.
Another core of the present invention is to provide a kind of assembly method for assembling described heating power expansion valve.
In order to make those skilled in the art be more fully understood that the present invention program, below in conjunction with the accompanying drawings and specifically
The present invention is described in further detail for embodiment.
" upper and lower, left and right " herein etc. represent that the term in orientation is position relationship based on accompanying drawing,
Should not be construed as the absolute limit to protection domain, in like manner, the term such as " first, second " be only for
It is easy to describe, to distinguish the different building blocks with same names, is not offered as successively or primary and secondary is closed
System.
Refer to Fig. 3, Fig. 4, Fig. 5, Fig. 3 is the first concrete reality of heating power expansion valve provided by the present invention
Execute the structural representation of mode；Fig. 4 is the close-up schematic view at B position in Fig. 3；Fig. 5 is Fig. 4
Shown in the Longitudinal cross section schematic of tapered plug.
In a kind of detailed description of the invention, the heating power expansion valve that the present invention provides is equally by valve body 1, valve port
2, air tank head 3, spool 4, spool fairlead 5, regulation spring 6, regulation parts 7, spring base 8 etc.
Parts are constituted.
Being machined with taper hole 11-1 in the middle part of driver blade 11, its top is miner diameter end, and bigger diameter end is towards bottom
Drive link 10；The regulating part loading taper hole 11-1 is tapered plug 17-1, and its material is pyrite or steel, cone
The cone angle of plug 17-1 and taper hole 11-1 is consistent, after tapered plug 17-1 loads taper hole 11-1, has between the two
There is certain magnitude of interference.
After assembling, the 10 times end in contact in spool 4 top and drive link coordinate, the top of drive link 10 and cone
The lower end in contact of plug 17-1 coordinates.
The magnitude of interference of above-mentioned tapered plug 17-1 and taper hole 11-1 should ensure that can offset the tune transmitted from below
The elastic force of joint spring 6, the i.e. elastic force of regulation spring 6 can not make tapered plug 17-1 move in taper hole 11-1,
Only tapered plug 17-1 just can be forced to move more than the pressure of regulation spring force, thus ensure tapered plug 17-1
The most no longer it is subjected to displacement, lower same.
This heating power expansion valve is when assembling, and its assemble sequence is consistent with existing heating power expansion valve, during valve work
The matching relationship of each parts also identical with existing heating power expansion valve, difference is that, by spool 4
After installing with drive link 10, its driver blade installation procedure comprises the following steps:
Step 11: keep spool 4 to be closed, put between driver blade 11 and valve body 1 top
One thickness is equal to the annular standard cushion block 18 of spool maximum opening；
Step 12, inserts tapered plug 17-1 the taper hole 11-1 in the middle part of driver blade 11, makes drive link 10
Top coordinates with the lower end in contact of tapered plug 17-1, then with drive link 10 for supporting, uses to driver blade
The technique that is press-fitted of 11 pressures adjusts the relative position of tapered plug 17-1 and driver blade 11 along moving direction；Now,
Tapered plug 17-1 position remains stationary as, and driver blade 11 moves relative to tapered plug 17-1；
Step 13: after and standard cushion block 18 complete until driver blade 11 is fitted, then standard cushion block 18 is taken out.
After completing above-mentioned operation, continue to assemble other parts according still further to existing operation, the most no longer
Repeat.
The thickness of above-mentioned standard cushion block 18 is spool maximum opening, i.e. spool 4 fully closed to driver blade 11 with
The displacement of spool 4 during valve body 1 tip contact.
Especially, can make the cone angle of tapered plug 17-1 into right angle, i.e. tapered plug is plunger, taper hole 11-1
Also making circular hole into, the magnitude of interference being press-fitted by plunger and circular hole completely ensures the resistance to drive link, with
Offset the elastic force of regulation spring.
Refer to Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 6 is the second of heating power expansion valve provided by the present invention
The structural representation of detailed description of the invention；Fig. 7 is the close-up schematic view at C position in Fig. 6；Fig. 8
Top view for screw rod shown in Fig. 7；Fig. 9 is the axonometric chart of screw rod shown in Fig. 7.
In another kind of detailed description of the invention, in the middle part of driver blade 11, it is machined with screw 11-2, loads screw
Regulating part be screw rod 17-2, screw rod 17-2 loads after screw 11-2, is matched by screw thread pair between the two
Close, and be provided with anti-loose structure.
Concrete assembly technology:
Step 21: keep spool 4 to be closed, put between driver blade 11 and valve body 1 top
One thickness is equal to the standard cushion block 18 of spool maximum opening；
Step 22, screws in screw rod 17-2 in the screw 11-2 of driver blade 11, makes the top of drive link 10
End coordinates with the lower end in contact of screw rod 17-2, and then rotary screw 17-2 adjusts it along moving direction and passes
The relative position of moving plate 11；
Step 23: after and standard cushion block 18 complete until driver blade 11 is fitted, then standard cushion block 18 is taken
Go out.
After adjustment, cementing standing screw 17-2 or the tailing screw flight of riveting screw rod 17-2, to prevent
Thread looseness.
Refer to Figure 10, Figure 11, Figure 12, Figure 10 is the 3rd tool of heating power expansion valve provided by the present invention
The structural representation of body embodiment；Figure 11 is the close-up schematic view at D position in Figure 10；Figure 12
Structural representation for the wedging driver blade of adjusting lever shown in Figure 11.
In another kind of detailed description of the invention, in the middle part of driver blade 11, it is machined with circular hole 11-3, loads circular hole
The regulating part of 11-3 is adjusting lever 17-3, and its material uses the high-abrasive material that hardness is higher.
Adjusting lever 17-3 is with n barb-shaped projection (n >=2), and these projections are outside adjusting lever 17-3
Axial distribution on surface, each projection is around the adjusting lever outer surface conical surface shape of a week, height from
Wedging end increases successively to the other end, it is illustrated that for h3 ＞ h2 ＞ h1.
Adjusting lever 17-3 is in the direction of diagram wedging circular hole 11-3, by wedging severity control driver blade 11
Position.Due to barb-shaped projection and circular hole 11-3 interference fit, adjusting lever 17-3 is the negative side of wedging
Upwards stop, therefore, it is possible to offset the elastic force of regulation spring 6.
Concrete assembly technology:
Step 31: keep spool 4 to be closed, put between driver blade 11 and valve body 1 top
One thickness, equal to the standard cushion block 18 of spool maximum opening, makes driver blade 11 paste with standard cushion block 18 completely
Close；
Step 32, by adjusting lever 17-3 wedging driver blade 11 circular hole 11-3 in, and by its wedge to
The position of drive link 10 tip contact；
Step 33: last, takes out standard cushion block 18.
The most several schemes all can adjust the relative position of driver blade 11 and drive link 10, thus eliminates dress
The error of distance (i.e. size A), its spool 4 above accumulating during joining to valve port end face to driver blade
Time fully closed, diaphragm 12 present position is only determined by the thickness of standard cushion block 18 and the thickness of driver blade 11, and
It not to be determined by size A, owing to the scale error of standard cushion block 18 and driver blade 11 is easily controllable, its
Range of error is less, and therefore the impact on diaphragm 12 can be down to minimum level such that it is able to ensure spool 4
Time fully closed, the concordance of diaphragm 12 position and the concordance of spool maximum opening, improve the life-span of diaphragm 12
Service behaviour with valve.
On the other hand, due to when spool 4 is fully closed diaphragm 12 present position only by standard cushion block 18 thickness and
Driver blade 11 thickness determines, therefore can relax the matching requirements of other operation when assembling, then only control
The regulating parts such as tapered plug 17-1, screw rod 17-2, adjusting lever 17-3 relative to the fitted position of driver blade 11,
Thus significantly reduce cost.
Certainly, above-mentioned heating power expansion valve and assembly method thereof are only several preferred versions, the most do not limit to
In this, can make having adjusting targetedly on this basis according to actual needs, thus obtain different
Embodiment.Such as, drive link and spool are integral type structure, or the projection of adjusting lever is other shape
Shape etc..
Above heating power expansion valve provided by the present invention and assembly method thereof are described in detail.Herein
In apply specific case principle and the embodiment of the present invention be set forth, saying of above example
The bright core concept being only intended to help to understand the present invention.It should be pointed out that, for the art is common
For technical staff, under the premise without departing from the principles of the invention, it is also possible to the present invention is carried out some changing
Entering and modify, these improve and modify in the protection domain also falling into the claims in the present invention.
Claims (9)
1. a heating power expansion valve assembly method, is used for assembling heating power expansion valve, described heating power expansion valve bag
Include driver blade, valve body and be positioned at the drive link in described valve body and spool, described spool top and described biography
Under lever, end in contact coordinates, and described driver blade is provided with and is moved along it the adjustable regulating part in position, direction, described biography
The top of lever coordinates with the lower end in contact of described regulating part；
Including driver blade installation procedure, it is characterised in that this operation comprises the following steps:
Step 11: keep described spool to be closed, put between described driver blade and valve body top
One thickness is equal to the standard cushion block of spool maximum opening；
Step 12, is installed on described driver blade by described regulating part, and along the moving direction of described driver blade
Adjust the relative position of described regulating part and driver blade；
Step 13: when the top of described drive link coordinates with the lower end in contact of described regulating part, and described biography
When moving plate is fitted with described standard cushion block completely, take out described standard cushion block.
Heating power expansion valve assembly method the most according to claim 1, it is characterised in that described transmission
Sheet offers and the endoporus of described drive link concentric, and described regulating part is installed in described endoporus.
Heating power expansion valve assembly method the most according to claim 2, it is characterised in that described regulation
Part is tapered plug, and described endoporus is the bigger diameter end taper hole towards described drive link；Described tapered plug and the cone angle of taper hole
Consistent and interference fit.
Heating power expansion valve assembly method the most according to claim 2, it is characterised in that described regulation
Part is plunger, and described endoporus is circular hole；Described plunger and circular hole interference fit.
Heating power expansion valve assembly method the most according to claim 2, it is characterised in that described regulation
Part is screw rod, and described endoporus is screw；Described screw rod is matched by screw thread pair with screw.
Heating power expansion valve assembly method the most according to claim 5, it is characterised in that described screw rod
And it is provided with anti-loose structure between screw.
Heating power expansion valve assembly method the most according to claim 2, it is characterised in that described regulation
Part is the outer circumference surface adjusting lever with barb-shaped projection, and described endoporus is circular hole；Institute wedged by described adjusting lever
State circular hole and with described circular hole interference fit, its wedging end relative with the upper end of described drive link.
Heating power expansion valve assembly method the most according to claim 7, it is characterised in that described agnail
Shape number of projection is multiple, and along described adjusting lever axial distribution, the height of each described barb-shaped projection is from wedge
Enter end to increase successively to the other end.
Heating power expansion valve assembly method the most according to claim 8, it is characterised in that described transmission
Bar and spool are integral type structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110330144.XA CN103075565B (en) | 2011-10-26 | 2011-10-26 | A kind of heating power expansion valve assembly method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110330144.XA CN103075565B (en) | 2011-10-26 | 2011-10-26 | A kind of heating power expansion valve assembly method |
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| CN103075565B true CN103075565B (en) | 2016-08-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109531148A (en) * | 2019-01-15 | 2019-03-29 | 中国计量大学 | A kind of heating power expansion valve automatic assembly equipment |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104748457B (en) * | 2013-12-27 | 2017-12-15 | 浙江三花制冷集团有限公司 | A kind of heating power expansion valve and its core assembly |
| CN105402438B (en) * | 2014-09-12 | 2019-05-31 | 浙江三花汽车零部件有限公司 | Heating power expansion valve and its manufacturing method |
| CN109073294A (en) * | 2016-05-11 | 2018-12-21 | 丹佛斯有限公司 | For the insertion piece of thermostatic expansion valve, thermostatic expansion valve and the method for assembling thermostatic expansion valve |
| CN114754157A (en) * | 2022-04-29 | 2022-07-15 | 中国电子科技集团公司第十四研究所 | Anti-overheating dynamic flow adjusting device applied to two-phase flow system |
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| US2484156A (en) * | 1944-04-14 | 1949-10-11 | Alco Valve Co | Valve with dual control |
| US2605050A (en) * | 1946-12-13 | 1952-07-29 | Alco Valve Co | Self-equalizing thermal valve |
| US2594701A (en) * | 1948-03-10 | 1952-04-29 | Refrigerator Components Ltd | Expansion valve for use in refrigerating and like apparatus |
| US3587642A (en) * | 1968-02-24 | 1971-06-28 | Firm Ernst Flitsch | Expansion valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109531148A (en) * | 2019-01-15 | 2019-03-29 | 中国计量大学 | A kind of heating power expansion valve automatic assembly equipment |
| CN109531148B (en) * | 2019-01-15 | 2023-12-22 | 中国计量大学 | Automatic assembly equipment for thermal expansion valve |
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| Publication number | Publication date |
|---|---|
| CN103075565A (en) | 2013-05-01 |
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