CN107255381B - Drying filter and refrigerating and heat pump system with same - Google Patents
Drying filter and refrigerating and heat pump system with same Download PDFInfo
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- CN107255381B CN107255381B CN201710644064.9A CN201710644064A CN107255381B CN 107255381 B CN107255381 B CN 107255381B CN 201710644064 A CN201710644064 A CN 201710644064A CN 107255381 B CN107255381 B CN 107255381B
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- drying
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- filtering
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/003—Filters
Abstract
The invention discloses a drying filter and a refrigerating and heat pump system with the same. The drying filter includes: the shell is provided with a drying and filtering cavity, and an air inlet and an air outlet which are respectively communicated with the drying and filtering cavity; the primary filtering device is arranged in the drying and filtering cavity and is adjacent to the air inlet; the secondary filtering device is arranged in the drying and filtering cavity and is adjacent to the air outlet; the drying device is arranged in the drying and filtering cavity and is positioned between the primary filtering device and the secondary filtering device; the guide plate is arranged in the drying and filtering cavity and is positioned between the air inlet and the primary filtering device, the guide plate is provided with a plurality of guide holes, and the guide holes guide the air entering the drying and filtering cavity from the air inlet to flow to the primary filtering device in a rotating mode. The drying filter has the advantages of high efficiency, safety, reliability, good stability and the like.
Description
Technical Field
The invention relates to the technical field of refrigeration and heat pumps, in particular to a dry filter and a refrigeration and heat pump system with the same.
Background
In the related art refrigerating and heating pump system, a dry filter is generally installed between the air cooler and the expansion device to remove water and impurities flowing along with the refrigerant. However, different processes (e.g., welding) result in different degrees of cleanliness of the refrigeration and heat pump systems, which makes the filter drier susceptible to "fouling", i.e., the filter drier is easily clogged by impurities in the refrigerant, thereby affecting the safety and stability of the system operation. Particularly for a refrigeration and heat pump system using CO2 (carbon dioxide) as a refrigerant, the dry filter is more prone to 'dirty blocking' due to the high working pressure and special properties of CO2, and the safety and stability of the system operation are affected.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the drying filter which has the advantages of high efficiency, safety, reliability, good stability and the like.
The invention also provides a refrigerating and heat pump system with the drying filter.
A filter-drier according to an embodiment of the first aspect of the invention comprises: the shell is provided with a drying and filtering cavity, and an air inlet and an air outlet which are respectively communicated with the drying and filtering cavity; a primary filter device disposed within the dry filter chamber adjacent the air inlet; a secondary filter device disposed within the dry filter chamber adjacent the air outlet; the drying device is arranged in the drying and filtering cavity and is positioned between the primary filtering device and the secondary filtering device; the guide plate is arranged in the drying and filtering cavity and positioned between the air inlet and the primary filtering device, the guide plate is provided with a plurality of guide holes, and the guide holes guide the air entering the drying and filtering cavity from the air inlet to flow to the primary filtering device in a rotating mode.
The drying filter provided by the embodiment of the invention has the advantages of high efficiency, safety, reliability, good stability and the like.
In addition, the drying filter according to the embodiment of the present invention has the following additional technical features:
according to some embodiments of the invention, a central axis of each of the deflector holes is inclined upward with respect to a central axis of the housing in a direction from the air inlet to the air outlet.
According to some embodiments of the invention, a plurality of the guide holes are arranged adjacent to the edge of the guide plate at intervals along the circumferential direction of the guide plate, and at least a part of the primary filter device, the side wall of the drying filter cavity and the guide plate jointly define a guide channel communicated with the guide holes.
In some embodiments of the invention, the primary filtration device comprises: the support piece is arranged in the drying and filtering cavity and positioned on one side of the flow guide plate facing the gas outlet, the support piece, the side wall of the drying and filtering cavity and the flow guide plate jointly define a primary filtering cavity communicated with the flow guide channel, the support piece is provided with a primary gas outlet and a plurality of gas inlet holes, and each gas inlet hole is respectively communicated with the primary filtering cavity and the primary gas outlet; the primary filter layer is wound outside the plurality of gas inlet holes, and the peripheral wall of the primary filter layer is spaced from the side wall of the drying filter cavity to form the flow guide channel.
Further, the support member includes: the sealing plate is positioned on one side of the flow guide plate facing the air outlet, the primary air outlet is formed in the sealing plate, and the primary filter cavity is defined by the sealing plate, the side wall of the drying filter cavity and the flow guide plate; the bracket is arranged at the primary gas outlet and stops against the guide plate, the plurality of gas inlet holes are formed in the peripheral wall of the bracket, and the primary filter layer is wound on the bracket and covers the plurality of gas inlet holes.
In an alternative embodiment of the present invention, the drying device includes: the first baffle is arranged in the drying and filtering cavity and positioned on one side of the support piece facing the gas outlet, the first baffle, the side wall of the drying and filtering cavity and the support piece jointly define a drying cavity, a plurality of first gas outlet holes are formed in the first baffle, and the drying cavity is respectively communicated with the primary gas outlet and the first gas outlet holes; the drying layer is arranged in the drying cavity.
In some embodiments of the invention, the secondary filtration device comprises: the second baffle is arranged in the drying and filtering cavity and positioned on one side, facing the gas outlet, of the first baffle, the second baffle, the side wall of the drying and filtering cavity and the first baffle jointly define a secondary filtering cavity communicated with the first gas outlet, and the second baffle is provided with a plurality of second gas outlet holes respectively communicated with the secondary filtering cavity and the gas outlet; the secondary filter layer is arranged in the secondary filter cavity.
Advantageously, the first gas outlets are arranged at intervals along the circumferential direction of the first baffle plate and are respectively arranged on a plurality of concentric circles, and the second gas outlets are arranged at intervals along the circumferential direction of the second baffle plate and are respectively arranged on a plurality of concentric circles.
Optionally, the primary and secondary filter layers are both fiberglass pieces and the drying layer is a molecular sieve.
Further, the support piece also comprises a metal net, and the metal net is wrapped outside the primary filter layer.
According to some embodiments of the invention, the housing comprises: a cylinder body with two open ends; the drying and filtering device comprises a first seal head and a second seal head, wherein the first seal head seals one end of the barrel, the second seal head seals the other end of the barrel, the first seal head, the second seal head and the barrel define the drying and filtering cavity together, and the air inlet is formed in the first seal head and the air outlet is formed in the second seal head.
The refrigeration and heat pump system according to an embodiment of the second aspect of the invention comprises the filter-drier according to an embodiment of the first aspect of the invention.
According to the refrigeration and heat pump system provided by the embodiment of the invention, the drying filter is utilized, so that the refrigeration and heat pump system is safe, reliable and good in stability.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic structural view of a filter-drier according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a baffle of a filter-drier according to an embodiment of the invention;
FIG. 3 is a schematic structural view of a support of a filter-drier according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view of a support for a filter-drier according to an embodiment of the invention;
fig. 5 is a schematic structural view of a first baffle (second baffle) of a filter-dryer according to an embodiment of the present invention.
Reference numerals:
the filter (1) is dried and filtered,
a shell 100, a drying filter cavity 101, a cylinder 110, a first sealing head 120, a second sealing head 130,
a primary filter device 200, a guide passage 201, a primary gas outlet 202, a support member 210, a closing plate 211, a holder 212, a primary filter layer 220, a metal mesh 230,
the drying device 400, the first baffle 410, the first gas outlet 411, the drying layer 420,
the flow guide plate 500, the flow guide holes 501,
flare fitting 600.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
The present application is based on the discovery and recognition by the inventors of the following facts and problems:
in the related art refrigerating and heating pump system, a dry filter is generally installed between the air cooler and the expansion device to remove water and impurities flowing along with the refrigerant. However, different processes (e.g., welding) result in different cleanliness of the refrigeration and heat pump systems, resulting in the dry filter being susceptible to "fouling", i.e., the dry filter is susceptible to being clogged by impurities in the refrigerant, thereby affecting the safety and stability of the system operation. Especially for the use of CO2Refrigeration and heat pump system using (carbon dioxide) as refrigerant, since CO2The filter drier has higher working pressure and special properties, and the filter drier is more easily subjected to 'dirty blockage'.
Therefore, the invention provides the drying filter 1 which is high in efficiency, safe, reliable and good in stability.
The filter-drier 1 according to the first aspect of the present invention is described below with reference to the accompanying drawings, and the filter-drier 1 has the advantages of high efficiency, safety, reliability, and stability.
As shown in fig. 1 to 5, a filter-drier 1 according to an embodiment of the present invention includes a case 100, a primary filtering device 200, a secondary filtering device 300, a drying device 400, and a guide plate 500.
Specifically, the housing 100 includes a cylinder 110, a first head 120, and a second head 130. The cylinder 110 is horizontally disposed, and left and right ends of the cylinder 110 are opened, respectively. The left end of the cylinder body 110 is sealed by the first sealing head 120, the right end of the cylinder body 110 is sealed by the second sealing head 130, the drying and filtering cavity 101 is defined by the first sealing head 120, the second sealing head 130 and the cylinder body 110 together, an air inlet is formed in the first sealing head 120, an air outlet is formed in the second sealing head 130, and the drying and filtering cavity 101 is communicated with the air inlet and the air outlet respectively. The central axis of the air inlet and the central axis of the air outlet coincide with the central axis of the cylinder 110, and the air inlet and the air outlet are respectively connected to the refrigeration and heat pump system through the flaring joint 600.
A baffle 500 is disposed within the dry filter chamber 101 and the baffle 500 is disposed adjacent the air inlet. Seamless welding is adopted between the guide plate 500 and the cylinder 110. The baffle 500 has a plurality of baffle holes 501, the plurality of baffle holes 501 are adjacent to the edge of the baffle 500 and are arranged at intervals along the circumferential direction of the baffle 500, and the central axis of each baffle hole 501 is inclined from left to right and upwards relative to the central axis of the barrel 110, i.e., the opening direction of each baffle hole 501 is towards the upper right.
The primary filter device 200 is disposed in the dry filter chamber 101 at the right side of the guide plate 500. The primary filter device 200 includes a support 210, a primary filter layer 220, and a metal mesh 230, and the support 210 includes a closing plate 211 and a bracket 212.
Specifically, the sealing plate 211 is positioned at the right side of the guide plate 500, and the primary gas outlet 202 is provided at the center of the sealing plate 211. The closing plate 211, the side wall of the drying filter chamber 101 and the baffle 500 together define a primary filter chamber, the bracket 212 is welded at the primary gas outlet 202, and the bracket 212 is located in the primary filter chamber, and the left end of the bracket 212 abuts against the baffle 500.
The support 212 is a circular tube with a diameter of 10mm, a plurality of gas inlet holes are formed in the tube wall of the circular tube, and each gas inlet hole is respectively communicated with the primary filter cavity and the primary gas outlet 202, so that the gas after primary filtration can be guided, the gas enters the drying device 400 according to a preset path, and the drying device 400 is ensured to be utilized to a greater extent.
The primary filter layer 220 is located within the primary filter chamber, and the primary filter layer 220 is wrapped around the support 212 and covers the plurality of gas inlet holes. The metal mesh 230 is wrapped outside the primary filter layer 220, and the metal mesh 230 serves to fix the primary filter layer 220 and can filter impurities having a large volume. The outer peripheral wall of the metal mesh 230 is spaced apart from the side wall of the drying filter cavity 101 to form a flow guide channel 201, and the flow guide channel 201 is respectively communicated with the flow guide holes 501 and the primary filter cavity.
Drying means 400 is disposed within drying filter cavity 101, and drying means 400 includes a first baffle 410 and a drying layer 420. The first baffle 410 is located at the right side of the cover plate 211, and the first baffle 410, the side wall of the drying filter cavity 101 and the cover plate 211 define the drying cavity together. The first baffle 410 is provided with a plurality of first gas outlet holes 411, the plurality of first gas outlet holes 411 are arranged at intervals along the circumferential direction of the first baffle 410, and the plurality of first gas outlet holes 411 are respectively arranged on a plurality of concentric circles. The drying chamber is respectively communicated with the primary gas outlet 202 and the plurality of first gas outlet holes 411, and the drying layer 420 is disposed in the drying chamber.
Wherein the opening directions of the primary gas outlet 202, the first gas-exiting apertures 411 and the second gas-exiting apertures 311 are all horizontal. The primary filter layer 220 and the secondary filter layer 320 are both fiberglass pieces, and the drying layer 420 is a molecular sieve. It should be noted that the arrangement of the diversion plate 500, the first baffle 410 and the second baffle 310 not only plays a role of diversion and support, but also ensures that the glass fiber does not flow out of the dry filter cavity 101 along with the refrigerant, thereby preventing the glass fiber from entering the refrigeration and heat pump system.
The operation of the filter-drier 1 according to the embodiment of the present invention will be described with reference to the accompanying drawings.
Such as CO2Wait that gas gets into dry filter chamber 101 by the flaring of left end connects 600, a plurality of water conservancy diversion holes 501 carry out the water conservancy diversion to gas for gas produces rotatoryly after guide plate 500, and gas produces centrifugal force, and like this, the great impurity of volume is just directly got rid of on the inner wall of barrel 110 under the effect of centrifugal force, can reduce the attached periphery wall of metal mesh 230 of the great impurity of volume.
Then, the gas enters the primary filter layer 220 for filtering, and then flows out of the primary filter device 200 through the gas inlet and the primary gas outlet 202 in sequence; then, the gas flowing out from the primary filtering device 200 enters the drying cavity, and is dried by the action of the drying layer 420, and the dried gas flows out of the drying device 400 through the first gas outlet 411; finally, the gas is filtered again by the secondary filter layer 320 and enters the refrigeration and heat pump system from the second gas outlet hole 311 and the flared fitting 600 at the right end in sequence.
In summary, according to the filter-drier 1 of the embodiment of the present invention, the gas can be thrown away with a part of impurities under the action of the centrifugal force, and the contact area between the gas and the primary filtering device 200 is increased, so that the filtering surface area can be ensured to a greater extent, thereby avoiding the occurrence of dirt blockage, and the filter-drier has high filtering and drying efficiency, is safe and reliable, has good stability, and is particularly suitable for the refrigerant CO2The refrigeration and heat pump system of (1).
In addition, the drying filter 1 according to the embodiment of the invention has a simple structure, so that the production and processing technology is simplified, and the drying filter is easy to machine and form.
It should be understood that the diameter of the diversion holes 501 may be 2mm to facilitate the gas to rotate during the flowing process, so as to further reduce the attachment of the impurities with larger volume on the surface of the metal mesh 230, and to ensure the filtering surface area of the primary filtering device 200 to a greater extent.
The refrigeration and heat pump system according to the second aspect of the invention comprises the filter-drier 1 according to the first aspect of the invention.
According to the refrigeration and heat pump system of the embodiment of the invention, the drying filter 1 is used, so that the refrigeration and heat pump system is safe, reliable and good in stability.
Other constructions and operations of the refrigerating and heat pump system according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail herein.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "left", "right", "horizontal", "inner", "outer", "circumferential", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "a specific embodiment," "an alternative embodiment," "an example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (11)
1. Suitable for the refrigerant being CO2The filter-drier of (2), comprising:
the shell is provided with a drying and filtering cavity, and an air inlet and an air outlet which are respectively communicated with the drying and filtering cavity;
a primary filter device disposed within the dry filter chamber and adjacent to the air inlet;
a secondary filter device disposed within the dry filter chamber adjacent the air outlet;
the drying device is arranged in the drying and filtering cavity and is positioned between the primary filtering device and the secondary filtering device;
the guide plate is arranged in the drying and filtering cavity and is positioned between the air inlet and the primary filtering device, and the guide plate is provided with a plurality of guide holes which guide the air entering the drying and filtering cavity from the air inlet to rotate and flow to the primary filtering device;
the primary filtration device comprises:
the support piece is arranged in the drying and filtering cavity and positioned on one side of the flow guide plate facing the gas outlet, the support piece, the side wall of the drying and filtering cavity and the flow guide plate jointly define a primary filtering cavity, the support piece is provided with a primary gas outlet and a plurality of gas inlet holes, and each gas inlet hole is respectively communicated with the primary filtering cavity and the primary gas outlet;
the primary filter layer is wound outside the gas inlet holes, and the peripheral wall of the primary filter layer is spaced from the side wall of the drying filter cavity to form a flow guide channel.
2. The refrigerant of claim 1, wherein said refrigerant is CO2The drier-filter of (1), wherein a central axis of each of the deflector holes is inclined upward with respect to a central axis of the housing in a direction from the air inlet to the air outlet.
3. The refrigerant of claim 1, wherein said refrigerant is CO2The drying filter is characterized in that a plurality of the flow guide holes are arranged close to the edge of the flow guide plate at intervals along the circumferential direction of the flow guide plate, and at least one part of the primary filtering device, the side wall of the drying filter cavity and the flow guide plate jointly define a flow guide channel communicated with the flow guide holes.
4. The method of claim 3 wherein the refrigerant is CO2The filter-drier of (1), wherein the support member comprises:
the sealing plate is positioned on one side of the flow guide plate facing the air outlet, and the primary air outlet is formed in the sealing plate;
the bracket is arranged at the primary gas outlet and stops against the guide plate, the plurality of gas inlet holes are formed in the peripheral wall of the bracket, and the primary filter layer is wound on the bracket and covers the plurality of gas inlet holes.
5. The method of claim 3 wherein the refrigerant is CO2The filter-drier of (1), wherein the drying means comprises:
the first baffle is arranged in the drying and filtering cavity and positioned on one side of the support piece facing the gas outlet, the first baffle, the side wall of the drying and filtering cavity and the support piece jointly define a drying cavity, a plurality of first gas outlet holes are formed in the first baffle, and the drying cavity is respectively communicated with the primary gas outlet and the first gas outlet holes;
the drying layer is arranged in the drying cavity.
6. The method of claim 5 wherein the refrigerant is CO2The filter-drier of (a), wherein the secondary filtering means comprises:
the second baffle is arranged in the drying and filtering cavity and positioned on one side, facing the gas outlet, of the first baffle, the second baffle, the side wall of the drying and filtering cavity and the first baffle jointly define a secondary filtering cavity communicated with the first gas outlet, and the second baffle is provided with a plurality of second gas outlet holes respectively communicated with the secondary filtering cavity and the gas outlet;
the secondary filter layer is arranged in the secondary filter cavity.
7. The method of claim 6 wherein the refrigerant is CO2The filter-drier according to (1), wherein the plurality of first gas outlets are arranged at intervals in the circumferential direction of the first baffle plate and are respectively arranged on a plurality of concentric circles, and the plurality of second gas outlets are arranged at intervals in the circumferential direction of the second baffle plate and are respectively arranged on a plurality of concentric circles.
8. The method of claim 6 wherein the refrigerant is CO2Characterized in that said primary filter layer and said secondary filter layerThe filtering layers are all glass fiber pieces, and the drying layer is a molecular sieve.
9. The method of claim 8 wherein the refrigerant is CO2The filter-drier of (1), wherein the support further comprises a metal mesh wrapped around the outer side of the primary filtration layer.
10. The refrigerant of claim 1, wherein said refrigerant is CO2The filter-drier of (a), wherein the housing comprises:
a cylinder body with two open ends;
the drying and filtering device comprises a first seal head and a second seal head, wherein the first seal head seals one end of the barrel, the second seal head seals the other end of the barrel, the first seal head, the second seal head and the barrel define the drying and filtering cavity together, and the air inlet is formed in the first seal head and the air outlet is formed in the second seal head.
11. Refrigeration and heat pump system, characterized in that it comprises a system for refrigeration and heat pump according to any one of claims 1 to 10, adapted to the refrigerant CO2The dry filter of (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710644064.9A CN107255381B (en) | 2017-07-31 | 2017-07-31 | Drying filter and refrigerating and heat pump system with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710644064.9A CN107255381B (en) | 2017-07-31 | 2017-07-31 | Drying filter and refrigerating and heat pump system with same |
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| Publication Number | Publication Date |
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| CN107255381A CN107255381A (en) | 2017-10-17 |
| CN107255381B true CN107255381B (en) | 2022-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710644064.9A Active CN107255381B (en) | 2017-07-31 | 2017-07-31 | Drying filter and refrigerating and heat pump system with same |
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| CN105102908A (en) * | 2013-04-11 | 2015-11-25 | 马勒国际公司 | Receiver |
| CN106546040A (en) * | 2015-09-18 | 2017-03-29 | 浙江三花智能控制股份有限公司 | Device for drying and filtering |
| CN106568246A (en) * | 2016-11-17 | 2017-04-19 | 珠海格力电器股份有限公司 | Oil separator and air conditioning unit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102257508B1 (en) * | 2014-06-24 | 2021-05-31 | 엘지전자 주식회사 | A linear compressor and a refrigerator including the same |
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|---|---|---|---|---|
| CN1446306A (en) * | 2000-08-11 | 2003-10-01 | 昭和电工株式会社 | Refrigerating-cycle receiver tank, heat exchanger with receiver tank and condensing unit for refrigerating-cycle |
| JP2008051344A (en) * | 2006-08-22 | 2008-03-06 | Daikin Ind Ltd | Gas-liquid separator and refrigerating device comprising the same |
| CN105102908A (en) * | 2013-04-11 | 2015-11-25 | 马勒国际公司 | Receiver |
| CN104729166A (en) * | 2013-12-23 | 2015-06-24 | 珠海格力电器股份有限公司 | Vertical oil separator and air-conditioning system |
| CN104807260A (en) * | 2014-01-27 | 2015-07-29 | 浙江三花制冷集团有限公司 | Dry filter |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107255381A (en) | 2017-10-17 |
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