CN201917150U - Device for automatically adjusting flow of refrigerating working medium - Google Patents
Device for automatically adjusting flow of refrigerating working medium Download PDFInfo
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- CN201917150U CN201917150U CN2010206493993U CN201020649399U CN201917150U CN 201917150 U CN201917150 U CN 201917150U CN 2010206493993 U CN2010206493993 U CN 2010206493993U CN 201020649399 U CN201020649399 U CN 201020649399U CN 201917150 U CN201917150 U CN 201917150U
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Abstract
The utility model discloses a device for automatically adjusting flow of a refrigerating working medium, comprising a compressor, a condenser, a dry filter, an electromagnetic valve, a floater expansion valve, a ball valve, a liquid reservoir, an evaporator and a gas-liquid separator. An outlet of the compressor is connected with the inlet of the condenser, the outlet of the condenser is connected with the inlet of the floater expansion valve through the dry filter and the electromagnetic valve, the outlet of the floater expansion valve is connected with the inlet of the evaporator, the outlet of the evaporator is connected with the inlet of the gas-liquid separator and the outlet of the gas-liquid separator is connected with inlet of the compressor. A top exhaust port of the floater expansion valve is connected with the inlet of the dry filter, and the bottom of the floater expansion valve is connected with the liquid reservoir through the ball valve. By improving the heat conducting performance of the condenser and the evaporator, the device can not only improve the refrigerating and heating loads of the system, but also increase the system performance coefficient by 15% above.
Description
Technical field
The utility model belongs to refrigeration technology field, is specifically related to a kind of device of automatic adjusting refrigeration working medium flow.
Background technology
Kind of refrigeration cycle is widely used in refrigeration, air-conditioning, the heat pump, realize to object or space refrigeration, heat.The technology of most critical is exactly the control to refrigerant flow in the refrigeration system.The control technology possibility that does not also have at present maturation extensively adopts to mainly contain the device of controlling automatically as flow of refrigerant based on capillary, heating power expansion valve, electric expansion valve, and all there is critical limitations in these control device, have limited the development of Refrigeration Technique.Though the capillary low price belongs to the constant flow control device, under the situation that operational factor changes, the operational efficiency of system is had a greatly reduced quality even can not safe operation.Heating power expansion valve has very limited load variations scope, and can only be at specifying pure working medium.For mixed working fluid, non-azeotropic mixed working medium particularly, heating power expansion valve is powerless.Though electric expansion valve on principle, can provide expansion process to non-azeotropic working medium, equipment, manufacturing are very complicated, and this technology also is in development, and the general expansion technique that is applicable to various mixed working fluids can not be provided.
The utility model content
The utility model purpose: the purpose of this utility model is at the deficiencies in the prior art, a kind of device that is applicable to the automatic adjusting refrigeration working medium flow of various kind of refrigeration cycle is provided, realizes distributing to the automatic control of various refrigeration working medium flows with to the optimization of cold-producing medium.
Technical scheme: the device of a kind of automatic adjusting refrigeration working medium flow described in the utility model, comprise compressor, condenser, device for drying and filtering, magnetic valve, the ball float expansion valve, ball valve, reservoir, evaporimeter and gas-liquid separator, the outlet of described compressor is connected with the import of described condenser, the outlet of described condenser is connected with the import of described ball float expansion valve with magnetic valve by described device for drying and filtering, the outlet of described ball float expansion valve is connected with described evaporator, the outlet of described evaporimeter is connected with described gas-liquid separator import, and the outlet of described gas-liquid separator is connected with the import of described compressor; The top vent of described ball float expansion valve is connected with the import of described device for drying and filtering; The bottom of described ball float expansion valve is connected with described reservoir by described ball valve; Be condensed into liquid state after the HTHP refrigeration working medium that comes out from described compressor enters described condenser, liquid refrigerant enters described ball float expansion valve after through described device for drying and filtering and magnetic valve; The bottom of described ball float expansion valve is connected by the reservoir of described ball valve with storaging liquid working medium; After the liquid refrigerant that comes out from the liquid outlet of described ball float expansion valve enters described evaporator evaporation, refrigeration working medium is injected into described gas-liquid separator, the refrigeration working medium that part is not evaporated fully is separated, and gaseous working medium is got back to the admission gear of described compressor by air inlet pipe;
Described ball float expansion valve comprises high-pressure chamber, low pressure cavity and is fixed on the spool one on the valve rod, the double spool structure that spool two is formed by float with connecting successively;
Described high-pressure chamber is provided with three perforates, is respectively the import of ball float expansion valve, the ball float expansion valve outlet that is used for the low-pressure fluid outflow that is used for high-pressure fluid and flows into and is used for the exhaust outlet that high-pressure chamber top gases at high pressure are discharged;
Described low pressure cavity is fixed on described high-pressure chamber inner bottom part by bearing; Described low pressure cavity is provided with three perforates, is respectively the low pressure cavity perforate one that is used for low-pressure fluid and flows out, low pressure cavity perforate two and the low pressure cavity perforate three that is used to install orifice plate two and orifice plate one; Described low pressure cavity perforate one is corresponding with described ball float expansion valve outlet, connects by pipeline; Described low pressure cavity perforate two and low pressure cavity perforate three are separately positioned on the corresponding position, top and bottom of described low pressure cavity;
In the described double spool structure, the upper end of described float be inserted in loop bar that the high-pressure chamber inner top is fixedlyed connected in, fixedly connected with the upper end of valve rod in the lower end of described float, described valve rod passes low pressure cavity perforate two and the low pressure cavity perforate three on the described low pressure cavity, the spool one and the spool two that are fixed on the described valve rod are corresponding with orifice plate two with described orifice plate one respectively, constitute two valves, the open degree of the rise and fall by-pass valve control by described float.
When described device was used for single function refrigeration unit, described condenser was outer machine, and described evaporimeter is interior machine.
When described device was used for single function heating machine set, described condenser was interior machine, and described evaporimeter is outer machine.
When described device was used for the unit of convertible refrigeration, heating mode, described condenser was outer machine or interior machine, machine or outer machine in described evaporimeter corresponds to; Connect by a cross valve between described compressor, described interior machine, described outer machine and the described gas-liquid separator; Described outer machine, described interior machine are connected with described device for drying and filtering by a check valve respectively; The outlet of described ball float expansion valve is connected with described outer machine with described interior machine by a check valve respectively.
The setting of the high-pressure chamber inside of described ball float expansion valve for convenience, described high-pressure chamber is made of two parts up and down, connects by flange between two parts.
What expansion valve of the present utility model adopted is the double spool structure, makes the high-low pressure fluid act on two active forces on the spool and cancels out each other, and so the open and close of valve are directly relevant with the liquid level in the high-pressure chamber; In the time of in high-pressure fluid does not enter high-pressure chamber, spool drops on the orifice plate, and just valve is closed; High-pressure fluid flows in the high-pressure chamber from the import of ball float expansion valve, when reaching certain liquid level in the high-pressure chamber,, float rises because being subjected to the buoyancy meeting, thus the rising of drive spool, thereby with valve opening.High-pressure fluid in the high-pressure chamber enters in the low-pressure cavity from orifice plate one and orifice plate two, through becoming low-pressure fluid after the throttling, flows out whole throttling arrangement from low pressure cavity perforate one, the outlet of ball float expansion valve.
The utility model compared with prior art, its beneficial effect is: 1, the combined mechanism of the utility model employing ball float expansion valve and reservoir, gas-liquid separator, optimize circular flow and the distribution of regulating refrigeration working medium, this device is used and is helped the control of simplification system, reduction equipment cost, raising systematic function coefficient and load, be applicable to various types of refrigeration working mediums, particularly mixed working fluid; 2, the ball float expansion valve of the utility model employing has been eliminated the percussion of differential pressure action power, the aperture of expansion valve only is subjected to the ball float buoyancy function, this expansion valve is the liquid working substance of condensation in the eductor condenser in time, guarantee that condenser is always the condensation refrigeration working medium maximum heat transfer area is provided, help to reduce condensing pressure and condensation temperature, improve the COP of system; And the expansion valve of common ball float control can make the valve body concussion out of control because of differential pressure action power, causes the pulsed concussion of cold-producing medium in evaporimeter to flow, and reduces the heat-transfer capability of evaporimeter, the reliability of reduction system; 3, the utility model device is adapted to all working medium, no matter is pure working medium, or mixed working fluid; For mixed working fluid, no matter how concentration of component changes, and this is that device can both be realized the mobile control of safe and reliable working medium; 4, the utility model device is by supporting cross valve and corresponding check valve control system, can realize refrigeration, heating mode conversion to the mixed working fluid heat pump, complexity, the potential safety hazard of the control aspect that conventional mixed working fluid system components concentration difference brought have been eliminated, mixed working fluid equally can be used as pure working medium, this is very easy to the research and development and the application of mixed working fluid; 5, the utility model device is by being provided with reservoir, match with the liquid storage function of gas-liquid separator, except the memory function that unnecessary working medium is provided, can also realize the optimization of mixed working fluid concentration is regulated, by the difference that is stored the working medium composition is chosen, can change the concentration of cycle fluid, thus the effect of the control of the parameter of the system of realization, raising energy saving effect; 6, the utility model device has been avoided the concussion that working medium flows in the evaporimeter, provides evaporimeter mild stable working medium flowing environment, has guaranteed efficient, the steady evaporation process of refrigeration working medium in evaporimeter; Cooperate the use of gas-liquid separator, whole heat-transfer areas of evaporimeter all are under the effect of gas-liquid two-phase moist steam, have improved heat transfer coefficient, the heat output of evaporimeter; 7, the utility model since improve condenser heat transfer property, improve the heat transfer property of evaporimeter, not only can improve system refrigeration, heat load, can also improve the systematic function coefficient more than 15%.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment 1 and embodiment 2.
Fig. 2 is the structural representation of the utility model embodiment 3.
Fig. 3 is the structural representation of the utility model embodiment 4.
Fig. 4 is the structural representation of ball float expansion valve in the utility model device.
Fig. 5 is a ball float expansion valve operation principle key diagram in the utility model device.
The specific embodiment
Below in conjunction with accompanying drawing, by most preferred embodiment, technical solutions of the utility model are elaborated, but protection domain of the present utility model is not limited to described embodiment.
Embodiment 1:
As shown in Figure 1, when the utility model device is used for the unit of convertible refrigeration, heating mode, when unit is refrigeration mode, outer machine 24 is a condenser, interior machine 25 is an evaporimeter, and the HTHP refrigeration working medium that comes out from compressor 21 enters cross valve 23, enters from terminal a from terminal d and flows out, enter outer machine 24, be condensed into liquid state.Liquid refrigerant via device for drying and filtering 27 and magnetic valve 28, enters ball float expansion valve 26 under the guiding of check valve 29, can open ball valve 213 as required, storing liquid working medium in reservoir 214; Generally speaking, the liquid refrigerant that comes from outer machine 24 streams will directly inject the working chamber of ball float expansion valve 26, because the particular design of this valve, valve body only is subjected to the ball float buoyancy function, be not subjected to the influence of expansion valve differential pressure action power, the action of valve body can be expanded working medium and transfers out expansion valve 26 gently freely according to outer machine 24 condensing rates; Under the inducing of check valve 210, refrigeration working medium flows into interior machine 25 and carries out evaporation process at interior machine 25; Behind the machine 25, refrigeration working medium injects gas-liquid separator 22 through c, the b terminal of cross valve 23 in leaving, and here, the cold-producing medium that part is not evaporated fully is separated, accumulates in the bottom of gas-liquid separator 22; Air inlet pipe obtains gaseous working medium from gas-liquid separator 22, and carries the admission gear that some rich oil liquid are got back to compressor 21 secretly by its band oilhole.
Described ball float expansion valve as shown in Figure 4, comprises high-pressure chamber 1, low pressure cavity 2 and is fixed on the spool 1 on the valve rod 6, the double spool structure that spool 25 is formed by float 9 with connecting successively;
Described high-pressure chamber 1 is made of two parts up and down, connects by flange between two parts; Described high-pressure chamber 1 is provided with three perforates, is respectively ball float expansion valve import 11, the ball float expansion valve outlet 12 that is used for the low-pressure fluid outflow that is used for high-pressure fluid and flows into and is used for the exhaust outlet 13 that high-pressure chamber top gases at high pressure are discharged;
Described low pressure cavity 2 is fixed on described high-pressure chamber 1 inner bottom part by bearing 3; Described low pressure cavity 2 is provided with three perforates, is respectively the low pressure cavity perforate 1 that is used for low-pressure fluid and flows out, low pressure cavity perforate 2 15 and the low pressure cavity perforate 3 16 that is used to install orifice plate 28 and orifice plate 1; It is 12 corresponding that described low pressure cavity perforate 1 and described ball float expansion valve export, and connects by pipeline; Described low pressure cavity perforate 2 15 and low pressure cavity perforate 3 16 are separately positioned on the corresponding position, top and bottom of described low pressure cavity 2;
In the described double spool structure, the upper end of described float 9 be inserted in loop bar 10 that high-pressure chamber 1 inner top is fixedlyed connected in, fixedly connected with the upper end of valve rod 6 in the lower end of described float 9, described valve rod 6 passes low pressure cavity perforate 2 15 and the low pressure cavity perforate 3 16 on the described low pressure cavity 2, the spool 1 and the spool 25 that are fixed on the described valve rod 6 are corresponding with orifice plate 28 with described orifice plate 1 respectively, constitute two valves, the open degree of the rise and fall by-pass valve control by described float 9.
Concrete operation principle is: in the time of in high-pressure fluid does not enter high-pressure chamber, spool drops on the orifice plate, and just valve is closed; High-pressure fluid flows in the high-pressure chamber from the import of ball float expansion valve, when reaching certain liquid level in the high-pressure chamber,, float rises because being subjected to the buoyancy meeting, thus the rising of drive spool, thereby with valve opening; High-pressure fluid in the high-pressure chamber enters in the low-pressure cavity from orifice plate one and orifice plate two, through becoming low-pressure fluid after the throttling, flows out whole throttling arrangement from low pressure cavity perforate one, the outlet of ball float expansion valve.What the utility model adopted is the double spool structure, makes the high-low pressure fluid act on the active force that connects on the spool and cancels out each other.So the open and close of valve are directly relevant with the liquid level in the high-pressure chamber, operation principle as shown in Figure 5, spool 1 is subjected to the interior high-pressure fluid of high-pressure chamber to its directed force F g1 that makes progress, the low-pressure fluid of low pressure cavity is to its downward directed force F d1, spool 25 is subjected to the interior high-pressure fluid of high-pressure chamber to its downward directed force F g2, and the low-pressure fluid of low pressure cavity is to its directed force F d2 that makes progress.Pressure equals pressure and multiply by active area.Be easy to just find out by Fig. 2: Fg1=Fg2, Fd1=Fd2, thus, the power that acts on spool one and the spool two is cancelled out each other.This part device that comprises spool 1, spool 25, valve rod 6, float 9 only is subjected to the active force that high-pressure fluid that overall downward gravity, the buoyancy that makes progress, valve rod 6 be subjected to makes progress.Because spool 1, spool 25 volumes are quite little, the density of float 9 is little, and therefore so the open and close of valve are directly relevant with buoyancy, and is just relevant with the liquid level in the high-pressure chamber.
Embodiment 2:
As shown in Figure 1, when the utility model device is used for the unit of convertible refrigeration, heating mode, when unit is heating mode, outer machine 24 is an evaporimeter, interior machine 25 is a condenser, and the HTHP refrigeration working medium that comes out from compressor 21 enters cross valve 23, enters from terminal c from terminal d and flows out, machine 25 in entering is condensed into liquid state.Liquid refrigerant via device for drying and filtering 27 and magnetic valve 28, enters ball float expansion valve 26 under the guiding of check valve 211, can open ball valve 213 as required, storing liquid working medium in reservoir 214; Generally speaking, the liquid refrigerant that comes from interior machine 25 streams will directly inject the working chamber of ball float expansion valve 26, because the particular design of this valve, valve body only is subjected to the ball float buoyancy function, be not subjected to the influence of expansion valve differential pressure action power, the action of valve body can be expanded working medium and transfers out expansion valve 26 gently freely according to interior machine 25 condensing rates; Under the inducing of check valve 212, refrigeration working medium flows into outer machine 24, also carries out evaporation process in the machine 24 outside; After leaving outer machine 24, refrigeration working medium injects gas-liquid separator 22 through a, the b terminal of cross valve 23, and here, the cold-producing medium that part is not evaporated fully is separated, accumulates in the bottom of gas-liquid separator 22; Air inlet pipe obtains gaseous working medium from gas-liquid separator 22, and carries the admission gear that some rich oil liquid are got back to compressor 21 secretly by its band oilhole.
The structure of described ball float expansion valve is with embodiment 1.
Embodiment 3:
As shown in Figure 2, when the utility model device was used for single function refrigeration unit, outer machine 24 was a condenser, and interior machine 25 is an evaporimeter, and machine 24 outside the HTHP refrigeration working medium that comes out from compressor 21 enters is condensed into liquid refrigerant.Liquid refrigerant enters ball float expansion valve 26 via device for drying and filtering 27 and magnetic valve 28, can open ball valve 213 as required, storing liquid working medium in reservoir 214; Generally speaking, the liquid refrigerant that comes from outer machine 24 streams will directly inject the working chamber of ball float expansion valve 26, because the particular design of this valve, valve body only is subjected to the ball float buoyancy function, be not subjected to the influence of expansion valve differential pressure action power, the action of valve body can be expanded working medium and transfers out expansion valve 26 gently freely according to outer machine condensing rate; Refrigeration working medium after the expansion flows into interior machine 25, refrigerating capacity is provided and finishes evaporation process; Behind the machine 25, refrigeration working medium flows into gas-liquid separator 22 in leaving, and here, the cold-producing medium that part is not evaporated fully is separated, accumulates in the bottom of gas-liquid separator 22; Air inlet pipe obtains gaseous working medium from gas-liquid separator 22, and carries the admission gear that some rich oil liquid are got back to compressor 21 secretly by its band oilhole.
The structure of described ball float expansion valve is with embodiment 1.
Embodiment 4:
As shown in Figure 3, when the utility model device was used for single function heating machine set, outer machine 24 was an evaporimeter, and interior machine 25 is a condenser, and machine 25 in the HTHP refrigeration working medium that comes out from compressor 21 enters is condensed into liquid state and provides and heats load.Liquid refrigerant enters ball float expansion valve 26 via device for drying and filtering 27 and magnetic valve 28, can open ball valve 213 as required, storing liquid working medium in reservoir 214; Generally speaking, the liquid refrigerant that comes from interior machine stream will directly inject the working chamber of ball float expansion valve 26, because the particular design of this valve, valve body only is subjected to the ball float buoyancy function, be not subjected to the influence of expansion valve differential pressure action power, the action of valve body can be expanded working medium and transfers out expansion valve 26 gently freely according to interior machine condensing rate; Refrigeration working medium after the expansion flows into outer machine 24, absorbs heat and finish evaporation process in the machine 24 outside; After leaving outer machine 24, refrigeration working medium flows into gas-liquid separator 22, and here, the cold-producing medium that part is not evaporated fully is separated, accumulates in the bottom of gas-liquid separator 22; Air inlet pipe obtains gaseous working medium from gas-liquid separator 22, and carries the admission gear that some rich oil liquid are got back to compressor 21 secretly by its band oilhole.
The structure of described ball float expansion valve is with embodiment 1.
As mentioned above, although represented and explained the utility model that with reference to specific preferred embodiment it shall not be construed as the restriction to the utility model self.Under the spirit and scope prerequisite of the present utility model that does not break away from the claims definition, can make various variations in the form and details to it.
Claims (5)
1. device of automatically regulating the refrigeration working medium flow, it is characterized in that: comprise compressor, condenser, device for drying and filtering, magnetic valve, the ball float expansion valve, ball valve, reservoir, evaporimeter and gas-liquid separator, the outlet of described compressor is connected with the import of described condenser, the outlet of described condenser is connected with the import of described ball float expansion valve with magnetic valve by described device for drying and filtering, the outlet of described ball float expansion valve is connected with described evaporator, the outlet of described evaporimeter is connected with described gas-liquid separator import, and the outlet of described gas-liquid separator is connected with the import of described compressor; The top vent of described ball float expansion valve is connected with the import of described device for drying and filtering; The bottom of described ball float expansion valve is connected with described reservoir by described ball valve;
Described ball float expansion valve comprises high-pressure chamber, low pressure cavity and is fixed on the spool one on the valve rod, the double spool structure that spool two is formed by float with connecting successively;
Described high-pressure chamber is provided with three perforates, is respectively the import of ball float expansion valve, the ball float expansion valve outlet that is used for the low-pressure fluid outflow that is used for high-pressure fluid and flows into and is used for the exhaust outlet that high-pressure chamber top gases at high pressure are discharged;
Described low pressure cavity is fixed on described high-pressure chamber inner bottom part by bearing; Described low pressure cavity is provided with three perforates, is respectively the low pressure cavity perforate one that is used for low-pressure fluid and flows out, low pressure cavity perforate two and the low pressure cavity perforate three that is used to install orifice plate two and orifice plate one; Described low pressure cavity perforate one is corresponding with described ball float expansion valve outlet, connects by pipeline; Described low pressure cavity perforate two and low pressure cavity perforate three are separately positioned on the corresponding position, top and bottom of described low pressure cavity;
In the described double spool structure, the upper end of described float be inserted in loop bar that the high-pressure chamber inner top is fixedlyed connected in, fixedly connected with the upper end of valve rod in the lower end of described float, described valve rod passes low pressure cavity perforate two and the low pressure cavity perforate three on the described low pressure cavity, the spool one and the spool two that are fixed on the described valve rod are corresponding with orifice plate two with described orifice plate one respectively, constitute two valves, the open degree of the rise and fall by-pass valve control by described float.
2. the device of automatic adjusting refrigeration working medium flow according to claim 1 is characterized in that: when described device was used for refrigeration unit, described condenser was outer machine, and described evaporimeter is interior machine.
3. the device of automatic adjusting refrigeration working medium flow according to claim 1 is characterized in that: when described device was used for heating machine set, described condenser was interior machine, and described evaporimeter is outer machine.
4. the device of automatic adjusting refrigeration working medium flow according to claim 1 is characterized in that: when described device was used for the unit of convertible refrigeration, heating mode, described condenser was outer machine or interior machine, machine or outer machine in described evaporimeter corresponds to; Connect by a cross valve between described compressor, described interior machine, described outer machine and the described gas-liquid separator; Described outer machine, described interior machine are connected with described device for drying and filtering by a check valve respectively; The outlet of described ball float expansion valve is connected with described outer machine with described interior machine by a check valve respectively.
5. according to the device of the described automatic adjusting refrigeration working medium flow of arbitrary claim in the claim 1～4, it is characterized in that: described high-pressure chamber is made of two parts up and down, connects by flange between two parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206493993U CN201917150U (en) | 2010-12-09 | 2010-12-09 | Device for automatically adjusting flow of refrigerating working medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206493993U CN201917150U (en) | 2010-12-09 | 2010-12-09 | Device for automatically adjusting flow of refrigerating working medium |
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| Publication Number | Publication Date |
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| CN201917150U true CN201917150U (en) | 2011-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010206493993U Expired - Lifetime CN201917150U (en) | 2010-12-09 | 2010-12-09 | Device for automatically adjusting flow of refrigerating working medium |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032728A (en) * | 2010-12-09 | 2011-04-27 | 东南大学 | Device for automatically adjusting flux of refrigeration working medium |
| CN102366685A (en) * | 2011-11-12 | 2012-03-07 | 大连叉车有限责任公司 | Filtering device for water treatment equipment |
| CN112915572A (en) * | 2021-02-26 | 2021-06-08 | 成都市倍诚分析技术有限公司 | Refrigeration and pressure sample gas separation method |
-
2010
- 2010-12-09 CN CN2010206493993U patent/CN201917150U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032728A (en) * | 2010-12-09 | 2011-04-27 | 东南大学 | Device for automatically adjusting flux of refrigeration working medium |
| CN102032728B (en) * | 2010-12-09 | 2012-03-14 | 东南大学 | Device for automatically adjusting flux of refrigeration working medium |
| CN102366685A (en) * | 2011-11-12 | 2012-03-07 | 大连叉车有限责任公司 | Filtering device for water treatment equipment |
| CN112915572A (en) * | 2021-02-26 | 2021-06-08 | 成都市倍诚分析技术有限公司 | Refrigeration and pressure sample gas separation method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110803 Effective date of abandoning: 20120314 |