CN110793245A - Vacuumizing method, refrigerant filling method and refrigerator - Google Patents
Vacuumizing method, refrigerant filling method and refrigerator Download PDFInfo
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- CN110793245A CN110793245A CN201911053894.XA CN201911053894A CN110793245A CN 110793245 A CN110793245 A CN 110793245A CN 201911053894 A CN201911053894 A CN 201911053894A CN 110793245 A CN110793245 A CN 110793245A
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- access port
- refrigerant
- refrigerant circulation
- circulation passage
- vacuumizing
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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
- F25B45/00—Arrangements for charging or discharging refrigerant
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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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
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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
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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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
Abstract
The invention discloses a vacuumizing method and a refrigerant filling method of a refrigerating system and a refrigerator, wherein the refrigerating system comprises a refrigerant circulating passage, a first access port and a second access port which are spaced from each other in the refrigerant flowing direction are arranged on the refrigerant circulating passage, and the vacuumizing method comprises the following steps: s1: introducing replacement gas into the refrigerant circulation passage through the first access port, and simultaneously sucking and exhausting gas from the refrigerant circulation passage through the second access port; s2: and stopping introducing the replacement gas, and sucking and exhausting the refrigerant circulation passage to ensure that at least part of refrigerant channel sections in the refrigerant circulation passage form negative pressure. The vacuumizing method, the refrigerant filling method and the refrigerator have the advantages of short vacuumizing time, high vacuumizing efficiency, reduced investment of vacuumizing equipment and personnel and reduced production cost.
Description
Technical Field
The invention relates to the technical field of vacuumizing, in particular to a vacuumizing method, a refrigerant filling method and a refrigerator.
Background
At present, a roots pump is mostly adopted in the industry of refrigerators for pre-vacuumizing, and after the pre-vacuumizing is balanced for a period of time, a rotary vane vacuum pump is adopted for vacuumizing for a period of time so as to completely pump out non-condensable gas and vapor in a refrigerator pipeline, so that the problems of unqualified energy consumption and noise of the refrigerator and dirty blockage or ice blockage are avoided. However, the roots pump is adopted for pre-vacuumizing, the equipment and personnel investment is large, the vacuumizing efficiency is low, the vacuumizing effect is poor, and the production requirement of the production line is difficult to meet by the original vacuumizing method if the efficiency of the production line needs to be improved.
Disclosure of Invention
The invention aims to provide a novel vacuumizing method, a refrigerant filling method and a refrigerator.
In order to achieve the above object, the present invention provides a vacuum pumping method for a refrigeration system, the refrigeration system including a refrigerant circulation passage, the refrigerant circulation passage being provided with a first access port and a second access port spaced from each other in a refrigerant flow direction, the vacuum pumping method including the steps of:
s1: introducing replacement gas into the refrigerant circulation passage through the first access port, and simultaneously sucking and exhausting gas from the refrigerant circulation passage through the second access port;
s2: and stopping introducing the replacement gas, and sucking and exhausting the refrigerant circulation passage to ensure that at least part of refrigerant channel sections in the refrigerant circulation passage form negative pressure.
Optionally, the vacuum pumping method may further include:
s3: stopping sucking and exhausting air to the refrigerant circulation passage, and sealing the first access port and the second access port;
s4: steps S2 and S3 are repeated.
In some embodiments, a compressor, a condenser, a dry filter, a throttling device and an evaporator may be disposed on the refrigerant circulation path, one of the first access port and the second access port is disposed on the dry filter, and the other is disposed on the compressor.
Furthermore, the first access port can be provided with a three-way pipe, and a first pipe orifice, a second pipe orifice and a third pipe orifice of the three-way pipe are respectively and correspondingly connected to the first access port, the replacement gas supply equipment and the vacuumizing equipment.
Further, the three-way pipe may be provided with a first electromagnetic valve for controlling a communication state between the first pipe orifice and the second pipe orifice and a second electromagnetic valve for controlling a communication state between the first pipe orifice and the third pipe orifice, the second access port being provided with a third electromagnetic valve, wherein,
in step S1, the first solenoid valve and the third solenoid valve are opened, the second solenoid valve is closed, the replacement gas supply device is started, and the refrigerant circulation passage is sucked and exhausted through the second access port;
in step S2, the first solenoid valve is closed, and the second solenoid valve is opened to suction and discharge air to and from the refrigerant circulation passage through the first access port and the second access port.
Optionally, in step S2, the refrigerant circulation path may be pumped and exhausted through the first access port and the second access port, so that at least a portion of the refrigerant channel section in the refrigerant circulation path forms a negative pressure.
Further, the displacement gas may be one of nitrogen, helium and carbon dioxide; and/or the displacing gas may be a heated gas.
Alternatively, the restriction may be a capillary tube.
Correspondingly, the invention also provides a refrigerant filling method, which comprises the step of vacuumizing the refrigerant circulation passage by the vacuumizing method and the step of injecting the refrigerant into the refrigerant circulation passage.
In addition, the invention also provides a refrigerator which comprises a refrigerating system, wherein the refrigerating system is provided with the refrigerant filled by the refrigerant filling method.
The vacuumizing method, the refrigerant filling method and the refrigerator are provided with the first access port and the second access port at intervals in the refrigerant circulating passage of the refrigerating system, and the replacement gas is introduced into the refrigerant circulating passage through the first access port, and meanwhile the refrigerant circulating passage is sucked and exhausted through the second access port, so that the replacement of air and non-condensable gas or water vapor in the refrigerant circulating passage can be accelerated, the replacement gas and the air and the water vapor in the refrigerant circulating passage are replaced, the air and the water vapor in the refrigerant circulating passage can be removed more fully, the vacuumizing and the water vapor removal are facilitated, and the subsequent vacuumizing is facilitated; and then, after the introduction of the replacement gas is stopped, the refrigerant circulation passage can be pumped and exhausted through the first access port and the second access port, so that at least part of refrigerant channel sections in the refrigerant circulation passage form negative pressure, a Roots pump is not needed for pre-vacuumizing, the vacuumizing time is shortened, the vacuumizing efficiency is improved, the investment of vacuumizing equipment and personnel can be reduced, and the production cost is reduced.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 shows a refrigerant circulation path according to a first embodiment of the present invention, wherein a first inlet is provided on a dry filter and a second inlet is provided on a compressor;
fig. 2 shows a refrigerant circulation path according to a second embodiment of the present invention, wherein a first inlet is disposed on a compressor and a second inlet is disposed on a dry filter.
Description of the reference numerals
1 first access port 2 second access port
3 compressor 4 condenser
5 drying filter 6 capillary tube
7 evaporator 8 three-way pipe
81 first orifice 82 second orifice
83 third orifice 9 replacement gas supply device
10 vacuum pumping equipment 11 first electromagnetic valve
12 second solenoid valve 13 third solenoid valve
Detailed Description
The following detailed description of specific embodiments of the invention refers to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and explanatory of the invention and are not restrictive thereof.
The vacuum-pumping method, the refrigerant filling method and the refrigerator according to the present invention are described below with reference to the accompanying drawings, and the vacuum-pumping method has the advantages of short vacuum-pumping time, high vacuum-pumping efficiency, reduced investment in vacuum-pumping equipment and personnel, and reduced production cost.
The refrigeration system of the vacuum pumping method of the invention comprises a refrigerant circulating passage, a first access port 1 and a second access port 2 which are arranged on the refrigerant circulating passage and are spaced from each other in the flowing direction of the refrigerant,
the vacuumizing method comprises the following steps:
s1: introducing replacement gas into the refrigerant circulation passage through the first access port 1, and simultaneously sucking and exhausting gas into the refrigerant circulation passage through the second access port 2;
s2: and stopping introducing the replacement gas, and sucking and exhausting the refrigerant circulation passage to ensure that at least part of refrigerant channel sections in the refrigerant circulation passage form negative pressure.
The refrigerant circulation path of the refrigeration system includes a refrigerant pipeline and a plurality of components of the refrigeration system arranged on the refrigerant pipeline, such as the compressor 3, the condenser 4, the filter drier 5, the throttling device and the evaporator 7, and different refrigeration systems, and the components required to be arranged in the refrigerant circulation path are different in type or number, but the invention is not limited thereto. In addition, the first access port 1 and the second access port 2 are arranged at intervals, namely the first access port 1 and the second access port 2 are not arranged at the same position on the refrigerant circulation passage, a section of refrigerant pipeline is also arranged between the first access port 1 and the second access port 2, and components of a refrigeration system can be arranged on the refrigerant pipeline. Therefore, in step S1, the replacement gas is introduced into the refrigerant circulation path through the first access port 1 and the suction and exhaust of the refrigerant circulation path through the second access port 2 are performed simultaneously, so that the air and the non-condensable gas or vapor in the refrigerant pipeline between the first access port 1 and the second access port 2 can be quickly replaced in the refrigerant flowing direction. And the replacement gas is replaced with the air and the water vapor in the refrigerant circulating passage, so that the air and the water vapor in the refrigerant circulating passage can be sufficiently removed, the vacuumizing and the water vapor removal are facilitated, and the subsequent vacuumizing is facilitated.
And then in step S2, the suction and exhaust of the refrigerant circulation path are performed after the introduction of the displacement gas is stopped, so that at least a part of the refrigerant channel segments in the refrigerant circulation path forms a negative pressure, thereby evacuating the refrigerant circulation path of the refrigeration system without pre-evacuation using a roots pump, shortening the evacuation time, improving the evacuation efficiency, reducing the investment of evacuation equipment and personnel, reducing the production cost, and satisfying the production requirement of improving the efficiency of the production line. In step S2, the refrigerant circulation path may be pumped and exhausted through the first access port 1, or the refrigerant circulation path may be pumped and exhausted through the second access port 2, or the refrigerant circulation path may be pumped and exhausted through both the first access port 1 and the second access port 2, so that at least a portion of the refrigerant channel segments in the refrigerant circulation path form a negative pressure. However, in order to further shorten the time for sucking and exhausting air to the refrigerant circulation passage and improve the efficiency of evacuation, the refrigerant circulation passage may be sucked and exhausted through the first access port 1 and the second access port 2 at the same time.
Further, the vacuum pumping method further comprises the following steps:
s3: stopping sucking and exhausting air to the refrigerant circulation passage, and sealing the first access port 1 and the second access port 2;
s4: steps S2 and S3 are repeated.
Therefore, when the suction and the exhaust of the refrigerant circulation passage are stopped for multiple times, the refrigerant circulation passage can lead the air pressure at each part in the refrigerant circulation passage to tend to be balanced through self regulation, and the suction and the exhaust of the refrigerant circulation passage are continued at the moment, so that the vacuum-pumping efficiency can be improved. And after multiple times of balance, the first access port 1 and the second access port 2 are used for sucking and exhausting air for the refrigerant circulation passage, so that the vacuumizing efficiency is higher.
Further, the replacement gas should be selected to be a gas that has little influence on the performance of the refrigerant and is environmentally friendly, so the replacement gas may be selected to be one of nitrogen, helium and carbon dioxide, and may be other inert gases, for example, but the invention is not limited thereto. The replacement gas may be a heated gas, so that the energy of the gas in the refrigerant circulation passage can be increased by the heated replacement gas, the gas circulation speed in the refrigerant circulation passage can be increased, the liquid in the refrigerant circulation passage can be heated into the gas, for example, the water in the refrigerant circulation passage can be heated into the vapor to be sucked and discharged out of the refrigerant circulation passage, and the efficiency of the vacuum pumping can be improved.
Optionally, the throttling device can be a capillary tube 6, and because the diameter of the capillary tube is small and the resistance of gas passing through the capillary tube is large, the vacuumizing time of the traditional method is long. Of course, the throttling device may also be a throttle valve, for example, and the invention is not limited thereto.
In addition, in the vacuum-pumping method of the present invention, since the operation of introducing the replacement gas into the refrigerant circulation passage and the operation of sucking and exhausting the refrigerant circulation passage need to be performed at the first access port 1, in order to facilitate the switching of different operations at the first access port 1, the first access port 1 may be provided with the three-way pipe 8, and the first pipe orifice 81, the second pipe orifice 82 and the third pipe orifice 83 of the three-way pipe 8 may be respectively connected to the first access port 1, the replacement gas supply apparatus 9 and the vacuum-pumping apparatus 10. In addition, for the convenience of control and operation, the efficiency of vacuum pumping is improved, and the first solenoid valve 11, the second solenoid valve 12 and the third solenoid valve 13 can be respectively arranged on the second nozzle 82, the third nozzle 83 and the second access port 2. The first electromagnetic valve 11 is used for controlling the communication state between the first nozzle 81 and the second nozzle 82, the second electromagnetic valve 12 is used for controlling the communication state between the first nozzle 81 and the third nozzle 83, and the third electromagnetic valve 13 is used for controlling the on-off of the second access port 2.
Referring to the first embodiment of fig. 1, a compressor 3, a condenser 4, a dry filter 5, a capillary tube 6 and an evaporator 7 are sequentially disposed on a refrigerant circulation path, a first access port 1 is disposed on a process pipe of the dry filter 5, and a second access port 2 is disposed on the process pipe of the compressor 3. The first access port 1 is provided with a three-way pipe 8, the second pipe orifice 82 of the three-way pipe 8 is provided with a first electromagnetic valve 11 and is connected with the replacement gas supply device 9, so that the replacement gas supply device 9 can be controlled to feed replacement gas into the first access port 1 through the first electromagnetic valve 11 or the replacement gas supply device 9 is stopped from feeding replacement gas into the first access port 1. The third pipe mouth 83 of the three-way pipe 8 is provided with the second electromagnetic valve 12 and connected with the vacuum pumping device 10, so that the vacuum pumping device 10 can be controlled to suck and exhaust the refrigerant circulation passage through the second electromagnetic valve 12 or the vacuum pumping device 10 is stopped to suck and exhaust the refrigerant circulation passage. The second access port 2 is provided with a third electromagnetic valve 13 and is connected with the vacuum-pumping equipment 10, so that the vacuum-pumping equipment 10 can be controlled to suck and exhaust the refrigerant circulation passage through the third electromagnetic valve 13 or the vacuum-pumping equipment 10 is stopped to suck and exhaust the refrigerant circulation passage. Wherein, in the first embodiment, hot nitrogen is used as the displacement gas.
Specifically, in the case of performing the evacuation method according to the present invention, step S1 is first performed to open the first electromagnetic valve 11 and the third electromagnetic valve 13 and close the second electromagnetic valve 12, that is, to start the replacement gas supply device 9 to introduce hot nitrogen gas into the refrigerant circulation passage through the first access port 1 and to suction and exhaust gas from the refrigerant circulation passage through the second access port 2. In this step, hot nitrogen gas can rapidly displace the air in the capillary 6 and the evaporator 7. After a certain time, step S2 is performed to close the first solenoid valve 11 to stop the introduction of the hot nitrogen gas into the refrigerant circulation path by the replacement gas supply device 9 and to open the second solenoid valve 12 and the third solenoid valve 13, so that the refrigerant circulation path can be simultaneously pumped and exhausted through the first access port 1 and the second access port 2. After the air is sucked and exhausted for a period of time, step S3 may be performed to close the first solenoid valve 11, the second solenoid valve 12, and the third solenoid valve 13, and stop sucking and exhausting the air in the refrigerant circulation path, so that the air pressure in each location in the refrigerant pipeline tends to be balanced after the refrigerant circulation path is adjusted by itself. Then, in step S4, steps S2 and S3 are repeated for a plurality of times, and finally, the air in the refrigerant circulation path can be purged.
Referring to the second embodiment of fig. 2, a compressor 3, a condenser 4, a dry filter 5, a capillary tube 6 and an evaporator 7 are sequentially disposed on a refrigerant circulation path, a first access port 1 is disposed on a process pipe of the compressor 3, and a second access port 2 is disposed on a process pipe of the dry filter 5. The first access port 1 is provided with a three-way pipe 8, the second pipe orifice 82 of the three-way pipe 8 is provided with a first electromagnetic valve 11 and is connected with the replacement gas supply device 9, so that the replacement gas supply device 9 can be controlled to feed replacement gas into the first access port 1 through the first electromagnetic valve 11 or the replacement gas supply device 9 is stopped from feeding replacement gas into the first access port 1. The third pipe mouth 83 of the three-way pipe 8 is provided with the second electromagnetic valve 12 and connected with the vacuum pumping device 10, so that the vacuum pumping device 10 can be controlled to suck and exhaust the refrigerant circulation passage through the second electromagnetic valve 12 or the vacuum pumping device 10 is stopped to suck and exhaust the refrigerant circulation passage. The second access port 2 is provided with a third electromagnetic valve 13 and is connected with the vacuum-pumping equipment 10, so that the vacuum-pumping equipment 10 can be controlled to suck and exhaust the refrigerant circulation passage through the third electromagnetic valve 13 or the vacuum-pumping equipment 10 is stopped to suck and exhaust the refrigerant circulation passage. Wherein, in the first embodiment, hot nitrogen is used as the displacement gas.
Specifically, in the case of performing the evacuation method according to the present invention, step S1 is first performed to open the first electromagnetic valve 11 and the third electromagnetic valve 13 and close the second electromagnetic valve 12, that is, to start the replacement gas supply device 9 to introduce hot nitrogen gas into the refrigerant circulation passage through the first access port 1 and to suction and exhaust gas from the refrigerant circulation passage through the second access port 2. In this step, the hot nitrogen gas can rapidly displace the air in the condenser 4. After a certain time, step S2 is performed to close the first solenoid valve 11 to stop the introduction of the hot nitrogen gas into the refrigerant circulation path by the replacement gas supply device 9 and to open the second solenoid valve 12 and the third solenoid valve 13, so that the refrigerant circulation path can be simultaneously pumped and exhausted through the first access port 1 and the second access port 2. After the air is sucked and exhausted for a period of time, step S3 may be performed to close the first solenoid valve 11, the second solenoid valve 12, and the third solenoid valve 13, and stop sucking and exhausting the air in the refrigerant circulation path, so that the air pressure in each location in the refrigerant pipeline tends to be balanced after the refrigerant circulation path is adjusted by itself. Then, in step S4, steps S2 and S3 are repeated for a plurality of times, and finally, the air in the refrigerant circulation path can be purged.
Correspondingly, the invention also provides a refrigerant filling method, which comprises the step of vacuumizing the refrigerant circulating passage according to the vacuumizing method and the step of injecting the refrigerant into the refrigerant circulating passage, so that the production efficiency can be greatly improved.
In addition, the invention also provides a refrigerator which comprises a refrigerating system, wherein the refrigerating system is provided with the refrigerant filled by the refrigerant filling method. At present, a roots pump is mostly adopted in the industry of refrigerators for pre-vacuumizing for 10s, after the balance is carried out for a period of time, a rotary vane vacuum pump is adopted for vacuumizing for 15-20 min, and the vacuumizing time is long, the efficiency is low and the cost is high. The method for vacuumizing only needs about 10min, so that the vacuumizing time can be greatly shortened, and the vacuumizing efficiency is improved; in addition, the vacuumizing method of the invention cancels the pre-vacuumizing process of a Roots pump and can be controlled by a valve, thereby reducing the investment of vacuumizing equipment and personnel and lowering the equipment cost and the labor cost.
In summary, the vacuumizing method, the refrigerant filling method and the refrigerator of the invention are provided with the first access port and the second access port at intervals in the refrigerant circulation passage of the refrigeration system, and the replacement gas is introduced into the refrigerant circulation passage through the first access port and simultaneously the suction and the exhaust of the refrigerant circulation passage through the second access port are carried out, so that the replacement of the air and the non-condensable gas or the vapor in the refrigerant circulation passage can be accelerated, the replacement gas is replaced with the air and the vapor in the refrigerant circulation passage, the air and the vapor in the refrigerant circulation passage can be removed more fully, the vacuumizing and the vapor removal are facilitated, and the subsequent vacuumizing is facilitated; and then, after the introduction of the replacement gas is stopped, the refrigerant circulation passage can be pumped and exhausted through the first access port and the second access port, so that at least part of refrigerant channel sections in the refrigerant circulation passage form negative pressure, a roots pump is not needed for pre-vacuumizing, the vacuumizing time is shortened, the vacuumizing efficiency is improved, the investment of vacuumizing equipment and personnel can be reduced, the production cost is reduced, and the production requirement for improving the efficiency of a production line can be met. Moreover, the vacuumizing method is particularly suitable for the vacuumizing operation of the refrigerant circulation passage with the capillary tube, can greatly shorten the vacuumizing time of the refrigerant circulation passage with the capillary tube, and improves the vacuumizing efficiency.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the 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 at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., 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 are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A vacuumizing method of a refrigerating system comprises a refrigerant circulating passage, and is characterized in that a first access port and a second access port which are spaced from each other in the refrigerant flowing direction are arranged on the refrigerant circulating passage, and the vacuumizing method comprises the following steps:
s1: introducing replacement gas into the refrigerant circulation passage through the first access port, and sucking and exhausting gas from the refrigerant circulation passage through the second access port;
s2: and stopping introducing the replacement gas, and sucking and exhausting the refrigerant circulation passage to ensure that at least part of refrigerant channel sections in the refrigerant circulation passage form negative pressure.
2. The evacuation method according to claim 1, further comprising:
s3: stopping sucking and exhausting air to the refrigerant circulation passage, and sealing the first access port and the second access port;
s4: steps S2 and S3 are repeated.
3. An evacuation method according to claim 1 or 2, wherein a compressor, a condenser, a dry filter, a throttling device, and an evaporator are provided in the refrigerant circulation passage, and one of the first access port and the second access port is provided in the dry filter, and the other is provided in the compressor.
4. The evacuation method according to claim 3, wherein the first access port is provided with a tee, and a first nozzle, a second nozzle and a third nozzle of the tee are respectively connected to the first access port, the replacement gas supply device and the evacuation device.
5. The evacuation method according to claim 4, wherein the tee is provided with a first solenoid valve for controlling a communication state between the first nozzle and the second nozzle and a second solenoid valve for controlling a communication state between the first nozzle and the third nozzle, the second access port is provided with a third solenoid valve, wherein,
in step S1, the first and third electromagnetic valves are opened, the second electromagnetic valve is closed, the replacement gas supply device is started, and the refrigerant circulation passage is sucked and exhausted through the second access port;
in step S2, the first solenoid valve is closed, and the second solenoid valve is opened to suction and discharge air to and from the refrigerant circulation passage through the first access port and the second access port.
6. The evacuation method according to claim 1 or 2, wherein in step S2, the refrigerant circulation passage is sucked and exhausted through the first access port and the second access port, so that at least a part of the refrigerant passage section in the refrigerant circulation passage is formed to have a negative pressure.
7. The evacuation method according to claim 1 or 2, wherein the substitution gas is one of nitrogen, helium, and carbon dioxide; and/or the displacement gas is a heated gas.
8. A method according to claim 1 or 2, wherein the throttling means is a capillary tube.
9. A refrigerant charging method comprising a step of evacuating the refrigerant circulation passage by the evacuation method according to any one of claims 1 to 8, and a step of injecting a refrigerant into the refrigerant circulation passage.
10. A refrigerator comprising a refrigeration system, characterized in that the refrigeration system has a refrigerant charged by the refrigerant charging method according to claim 9.
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| CN201911053894.XA CN110793245B (en) | 2019-10-31 | 2019-10-31 | Vacuumizing method, refrigerant filling method and refrigerator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112594982A (en) * | 2020-12-31 | 2021-04-02 | 广东积微科技有限公司 | Vacuumizing control method of multi-split system |
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