CN112113372A - Refrigerant charging method and system - Google Patents
Refrigerant charging method and system Download PDFInfo
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- CN112113372A CN112113372A CN201910536935.4A CN201910536935A CN112113372A CN 112113372 A CN112113372 A CN 112113372A CN 201910536935 A CN201910536935 A CN 201910536935A CN 112113372 A CN112113372 A CN 112113372A
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- refrigerant
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- storage tank
- pressure pipeline
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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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Abstract
The invention relates to a refrigerant charging method and a system, wherein the charging method comprises the following steps: a refrigerant is pre-filled into a refrigerant storage tank, and a valve I connected with a refrigeration system is arranged on the refrigerant storage tank; connecting a refrigerant storage tank with a high-pressure pipeline and/or a low-pressure pipeline of a refrigeration system; vacuumizing the refrigeration system; opening a valve I of a refrigerant storage tank to enable the refrigerant to enter a refrigeration system to complete refrigerant filling; the filling system comprises a high-pressure pipeline, a compressor, a condenser, a low-pressure pipeline, a throttling device, an evaporator, a refrigerant storage tank, a valve I, a valve II and a valve III. The invention has simple filling process and uniform effect, greatly simplifies the operation steps, and is particularly suitable for a refrigerating system which can be completed by multiple filling and multiple balancing, such as two-stage overlapping, mixed working medium refrigeration and the like.
Description
Technical Field
The present application relates to the field of refrigeration technology, and more particularly, to a method and system for refrigerant charging.
Background
Currently, the refrigerant charging process is performed through vacuum-charging-operation steps. The amount of refrigerant charged is accurately measured during charging. The refrigerant, whether it is charged more or less, affects the cooling temperature and cooling efficiency. For the R404A two-component refrigerant, the charge is in liquid form, otherwise the charge component ratio may be changed. The mixed working medium with the refrigerating temperature of below-70 ℃ consists of a plurality of components with large boiling point difference. During filling, the four steps of vacuumizing, primary inflation balancing, secondary inflation balancing and tertiary inflation balancing are required, wherein the states of a compressor and a valve in each step are different, training is required, and filling can be completed only by certain experience and technical level. The amount of refrigerant charged into the refrigeration system and the component ratio thereof have a great influence on the refrigeration effect, and the final effect of products produced according to the standard flow is often different depending on the person charged with the refrigerant.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method and a system for filling refrigerant, which have simple filling process and uniform effect and obviously improve the refrigeration effect.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
a method of refrigerant charging, comprising the steps of:
a. a refrigerant is pre-filled into a refrigerant storage tank, and a valve I connected with a refrigeration system is arranged on the refrigerant storage tank;
b. connecting a refrigerant storage tank with a high-pressure pipeline and/or a low-pressure pipeline of a refrigeration system through a valve I;
c. vacuumizing the refrigerating system to the required pressure for the required time;
d. and opening a valve I of the refrigerant storage tank to enable the refrigerant to enter the refrigeration system to complete refrigerant filling.
The technical scheme of the invention is further improved as follows: the valve I is connected with a high-pressure pipeline and/or a low-pressure pipeline of the refrigerating system through welding or a bell mouth.
The technical scheme of the invention is further improved as follows: the refrigerating system is a self-cascade refrigerating system, the refrigerant is multi-component mixed refrigerant, the refrigerant storage tank is a liquid storage tank or a gas storage tank, and the valve I is a stop valve.
A refrigerant filling system is used for realizing the filling method and comprises a high-pressure pipeline, a compressor and a condenser which are arranged on the high-pressure pipeline, a low-pressure pipeline which is connected with the high-pressure pipeline through a transition pipeline, a throttling device and an evaporator which are arranged on the low-pressure pipeline, a refrigerant storage tank which is connected with the high-pressure pipeline and/or the low-pressure pipeline, and a valve I which is arranged on the refrigerant storage tank, wherein the valve I is connected with the high-pressure pipeline and/or the low-pressure pipeline.
The technical scheme of the invention is further improved as follows: the valve I is connected with a low-pressure pipeline close to the evaporator, when the refrigerant is filled, the refrigerant storage tank is connected with the low-pressure pipeline close to the evaporator in the refrigeration system, the refrigeration system is vacuumized, the valve I of the refrigerant storage tank is opened, and the refrigerant is filled into the refrigeration system to finish operation, which corresponds to the first embodiment.
The technical scheme of the invention is further improved as follows: and the valve I is connected with a high-pressure pipeline between the compressor and the condenser and a low-pressure pipeline which is close to the evaporator and far away from the throttling device, when the refrigerant is filled, the refrigerant storage tank is connected into a refrigerating system pipeline, the refrigerating system is vacuumized, the valve I of the refrigerant storage tank is opened, and the refrigerant is filled into the refrigerating system, which corresponds to the third embodiment.
The technical scheme of the invention is further improved as follows: and a valve II and a valve III which are connected with the valve I are also arranged on the refrigerant storage tank.
The technical scheme of the invention is further improved as follows: and the valve II and the valve III are correspondingly connected with a high-pressure pipeline and a low-pressure pipeline respectively, and are connected with a refrigerant storage tank through the valve I. Namely, the valve I is positioned between the valve II and the valve III, the valve I is a main body, and the valve II and the valve III are branches; when filling the refrigerant, connecting the refrigerant storage tank into a refrigeration system pipeline, vacuumizing the refrigeration system, then opening a valve II and a valve III of the refrigerant storage tank, and filling the refrigerant into the refrigeration system; when the refrigerating system equipment runs, opening the valve II, storing part of the refrigerant in the refrigerant storage tank, then opening the valve III, and enabling the refrigerant in the refrigerant storage tank to enter the refrigerating system; corresponding to example four.
The technical scheme of the invention is further improved as follows: valve I is connected with high-pressure line, and the one end of valve II and valve III is connected respectively on the high-pressure line of I both sides of valve, the other end all is connected on the refrigerant storage tank, and the refrigerant storage tank is the liquid storage pot.
The technical scheme of the invention is further improved as follows: when the refrigerant is filled, the liquid storage tank is connected to a high-pressure pipeline of the refrigeration system, the valve I is opened, and the refrigeration system is vacuumized; closing the valve I, opening the valve II and the valve III, and filling the refrigerant in the liquid storage tank into the refrigeration system; corresponding to the second embodiment.
Due to the adoption of the technical scheme, the invention has the beneficial effects that:
the invention fills the refrigerant into a refrigerant storage tank in advance, and when filling the refrigerant, the storage tank is only connected with the refrigeration system, the refrigeration system is vacuumized, and the storage tank valve is opened, thus the filling of the refrigerant is completed. The filling effect can not be different from person to person, and the method is particularly suitable for refrigerating systems which can be completed by multiple filling and multiple balancing, such as double-stage overlapping, mixed working medium refrigeration and the like.
Drawings
FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a second embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a third embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a fourth embodiment of the present invention;
wherein: 1. a compressor; 2. a condenser; 3. a throttling device; 4. an evaporator; 5. a refrigerant storage tank; 6. a liquid storage tank; 7. a valve I; 8. a valve II; 9. and a valve III.
Detailed Description
The present invention will be described in further detail with reference to examples.
A method of refrigerant charging, comprising the steps of:
a. a refrigerant is filled into a refrigerant storage tank 5 in advance, and a valve I7 connected with a refrigeration system is arranged on the refrigerant storage tank 5;
b. the refrigerant storage tank 5 is connected with a high-pressure pipeline and/or a low-pressure pipeline of a refrigeration system through a valve I7;
c. vacuumizing the refrigerating system to the required pressure for the required time;
d. and opening a valve I7 of the refrigerant storage tank 5 to enable the refrigerant to enter the refrigeration system, and finishing the refrigerant charging.
The valve I7 is connected with a high-pressure pipeline and/or a low-pressure pipeline of a refrigeration system through welding or a bell mouth, the refrigeration system is a self-cascade refrigeration system, the refrigerant is a multi-element mixed refrigerant, the refrigerant storage tank 5 is a liquid storage tank or a gas storage tank, and the valve I7 is a stop valve.
A refrigerant filling system is used for achieving the filling method and comprises a high-pressure pipeline, a compressor 1 and a condenser 2 which are arranged on the high-pressure pipeline, a low-pressure pipeline which is connected with the high-pressure pipeline through a transition pipeline, a throttling device 3 and an evaporator 4 which are arranged on the low-pressure pipeline, a refrigerant storage tank 5 which is connected with the high-pressure pipeline and/or the low-pressure pipeline, and a valve I7 which is arranged on the refrigerant storage tank 5, wherein the valve I7 is connected with the high-pressure pipeline and/or the low-pressure pipeline.
Valve I7 is connected with the low-pressure pipeline close to evaporator 4.
Alternatively, the valve i 7 is connected to a high-pressure line between the compressor 1 and the condenser 2 and to a low-pressure line close to the evaporator 4 and remote from the throttling means 3.
Or the refrigerant storage tank 5 is also provided with a valve II 8 and a valve III 9 which are both connected with the valve I7.
Valve II 8 and valve III 9 correspond respectively and connect high-pressure line and low-pressure line, and valve II 8 and valve III 9 all are connected with refrigerant storage tank 5 through valve I7. That is, valve I7 is located between valve II 8 and valve III 9, valve I7 is the trunk, and valve II 8 and valve III 9 are the branches.
Or, valve I7 is connected with high-pressure pipeline, and the one end of valve II 8 and valve III 9 is connected respectively on the high-pressure pipeline of valve I7 both sides, and the other end all is connected on refrigerant storage tank 5, and refrigerant storage tank 5 is the liquid storage pot.
For a refrigerant charging system, the following examples are specifically illustrated:
example one
A refrigerant charging system, see fig. 1, includes a compressor 1, a condenser 2, an evaporator 4, and a throttle device 3. The refrigerant is charged in the refrigerant storage tank 5 in advance. The amount of refrigerant is matched to the refrigeration system. The refrigerant reservoir 5 is provided with a valve i 7. When the refrigerant is filled, the refrigerant storage tank 5 is connected with a low-pressure pipeline close to the evaporator 4 in the refrigeration system, the refrigeration system is vacuumized, the valve I7 of the refrigerant storage tank 5 is opened, and the refrigerant is filled into the refrigeration system to finish the operation.
In the second embodiment, referring to fig. 2, the refrigeration system includes a compressor 1, a condenser 2, an evaporator 4, a throttling device 3, and a refrigerant storage tank 5, where the refrigerant storage tank 5 is a liquid storage tank 6. The refrigerant is pre-charged into the liquid storage tank 6, and the amount of the refrigerant is matched with that of the refrigerating system. Liquid storage pot 6 has three valve, is valve I7, valve II 8, valve III 9 respectively, and valve I7 is connected with the high-pressure line that is close to condenser 2, and the one end of valve II 8 and valve III 9 is connected respectively on the high-pressure line of valve I7 both sides, the other end all is connected on refrigerant storage tank 5. When the refrigerant is filled, the liquid storage tank 6 is connected to a high-pressure pipeline of the refrigeration system, the valve I7 is opened, the refrigeration system is vacuumized, the valve I7 is closed, the valve II 8 and the valve III 9 are opened, and the refrigerant in the liquid storage tank 6 is filled into the refrigeration system. The present solution is suitable for systems with a liquid reservoir 6.
Third embodiment, referring to fig. 3, the refrigeration system includes a compressor 1, a condenser 2, an evaporator 4, a throttling device 3, and a refrigerant storage tank 5. The refrigerant is pre-charged into the refrigerant storage tank 5, and the amount of the refrigerant is matched with that of the refrigeration system. The refrigerant reservoir 5 is provided with a valve i 7, which valve i 7 is connected both to the high-pressure line between the compressor 1 and the condenser 2 and to the low-pressure line close to the evaporator 4 and remote from the throttle device 3. When the refrigerant is filled, the refrigerant storage tank 5 is connected to a refrigerating system pipeline, the refrigerating system is vacuumized, the valve I7 of the refrigerant storage tank 5 is opened, and the refrigerant is filled into the refrigerating system. Compared with the first embodiment, the refrigerant is charged into the high-pressure system and the low-pressure system of the refrigeration system at the same time, and the charging speed is higher.
Example four, see fig. 4: the difference between the scheme and the scheme III lies in that the refrigerant storage tank 5 is provided with three valves (a valve I7, a valve II 8 and a valve III 9), the valve I7 is a main path, and a high-pressure pipeline and a low-pressure pipeline which are connected with the refrigerant storage tank 5 are respectively provided with the valve II 8 and the valve III 9 which have branching functions and are used for controlling the refrigerant filled into the high-pressure pipeline and the low-pressure pipeline respectively. When the refrigerant is filled, the refrigerant storage tank 5 is connected to a refrigerating system pipeline, the refrigerating system is vacuumized, the valve II 8 and the valve III 9 of the refrigerant storage tank 5 are opened, and the refrigerant is filled into the refrigerating system. When the equipment runs, the valve II 8 is opened, part of the refrigerant is stored in the refrigerant storage tank 5, the valve III 9 is opened, and the refrigerant in the refrigerant storage tank 5 enters the refrigeration system. The refrigerating capacity and the refrigerating temperature are adjusted by adjusting the amount of the refrigerant in the refrigerating system. The scheme is suitable for a double-stage cascade or mixed working medium refrigerating system.
Claims (10)
1. A method of refrigerant charging, comprising the steps of:
a. a refrigerant is filled into a refrigerant storage tank (5) in advance, and a valve I (7) connected with a refrigeration system is arranged on the refrigerant storage tank (5);
b. connecting a refrigerant storage tank (5) with a high-pressure pipeline and/or a low-pressure pipeline of a refrigeration system through a valve I (7);
c. vacuumizing the refrigerating system to the required pressure for the required time;
d. and opening a valve I (7) of the refrigerant storage tank (5) to enable the refrigerant to enter the refrigeration system, and finishing the refrigerant filling.
2. A refrigerant charging method as set forth in claim 1, wherein: the valve I (7) is connected with a high-pressure pipeline and/or a low-pressure pipeline of the refrigerating system through welding or a bell mouth.
3. A refrigerant charging method as set forth in claim 2, wherein: the refrigerating system is a self-cascade refrigerating system, the refrigerant is a multi-element mixed refrigerant, and the valve I (7) is a stop valve.
4. A refrigerant charging system characterized by: the filling method for realizing the method as claimed in claim 1, comprising a high-pressure pipeline, a compressor (1) and a condenser (2) which are arranged on the high-pressure pipeline, a low-pressure pipeline which is connected with the high-pressure pipeline through a transition pipeline, a throttling device (3) and an evaporator (4) which are arranged on the low-pressure pipeline, a refrigerant storage tank (5) which is connected with the high-pressure pipeline and/or the low-pressure pipeline, and a valve I (7) which is arranged on the refrigerant storage tank (5), wherein the valve I (7) is connected with the high-pressure pipeline and/or the low-pressure pipeline.
5. A refrigerant charging system as set forth in claim 4, wherein: the valve I (7) is connected with a low-pressure pipeline close to the evaporator (4); when the refrigerant is filled, the refrigerant storage tank (5) is connected with a low-pressure pipeline close to the evaporator (4) in the refrigeration system, the refrigeration system is vacuumized, a valve I (7) of the refrigerant storage tank (5) is opened, and the refrigerant is filled into the refrigeration system to finish the operation.
6. A refrigerant charging system as set forth in claim 4, wherein: the valve I (7) is connected with a high-pressure pipeline between the compressor (1) and the condenser (2) and a low-pressure pipeline which is close to the evaporator (4) and far away from the throttling device (3); when the refrigerant is filled, the refrigerant storage tank (5) is connected to a refrigerating system pipeline, the refrigerating system is vacuumized, a valve I (7) of the refrigerant storage tank (5) is opened, and the refrigerant is filled into the refrigerating system.
7. A refrigerant charging system as set forth in claim 4, wherein: and a valve II (8) and a valve III (9) which are connected with the valve I (7) are also arranged on the refrigerant storage tank (5).
8. A refrigerant charging system as set forth in claim 7, wherein: the valve II (8) and the valve III (9) are respectively and correspondingly connected with a high-pressure pipeline and a low-pressure pipeline, and the valve II (8) and the valve III (9) are both connected with the refrigerant storage tank (5) through a valve I (7); when the refrigerant is filled, the refrigerant storage tank (5) is connected to a refrigeration system pipeline, the refrigeration system is vacuumized, then a valve II (8) and a valve III (9) of the refrigerant storage tank (5) are opened, and the refrigerant is filled into the refrigeration system; when the refrigerating system equipment is operated, the valve II (8) is opened, part of refrigerant is stored in the refrigerant storage tank (5), then the valve III (9) is opened, and the refrigerant in the refrigerant storage tank (5) enters the refrigerating system.
9. A refrigerant charging system as set forth in claim 7, wherein: valve I (7) is connected with high-pressure pipeline, and the one end of valve II (8) and valve III (9) is connected respectively on the high-pressure pipeline of valve I (7) both sides, and the other end all is connected on refrigerant storage tank (5), and refrigerant storage tank (5) are liquid storage pot (6).
10. A refrigerant charging system as set forth in claim 9, wherein: when the refrigerant is filled, the liquid storage tank (6) is connected to a high-pressure pipeline of the refrigeration system, the valve I (7) is opened, and the refrigeration system is vacuumized; and (3) closing the valve I (7), opening the valve II (8) and the valve III (9), and filling the refrigerant in the liquid storage tank (6) into the refrigeration system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910536935.4A CN112113372A (en) | 2019-06-20 | 2019-06-20 | Refrigerant charging method and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910536935.4A CN112113372A (en) | 2019-06-20 | 2019-06-20 | Refrigerant charging method and system |
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| CN112113372A true CN112113372A (en) | 2020-12-22 |
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| CN201910536935.4A Pending CN112113372A (en) | 2019-06-20 | 2019-06-20 | Refrigerant charging method and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113847761A (en) * | 2021-10-26 | 2021-12-28 | 漳州科华电气技术有限公司 | Method for filling refrigerant in air conditioning system |
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| CN207113320U (en) * | 2016-09-19 | 2018-03-16 | 重庆小金人电子商务有限公司 | A kind of filing provision for on-board air conditioner |
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2019
- 2019-06-20 CN CN201910536935.4A patent/CN112113372A/en active Pending
Patent Citations (5)
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| CN202835964U (en) * | 2012-07-31 | 2013-03-27 | 宝钢发展有限公司 | Automatic addition device for refrigerant of air conditioner |
| CN103307823A (en) * | 2013-06-16 | 2013-09-18 | 江苏春兰制冷设备股份有限公司 | Split type room air conditioner refrigeration system and method for filling refrigerant into same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113847761A (en) * | 2021-10-26 | 2021-12-28 | 漳州科华电气技术有限公司 | Method for filling refrigerant in air conditioning system |
| CN113847761B (en) * | 2021-10-26 | 2023-08-18 | 漳州科华电气技术有限公司 | Method for filling refrigerant in air conditioning system |
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