CN110220324B - Four-way valve and air conditioning system - Google Patents
Four-way valve and air conditioning system Download PDFInfo
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- CN110220324B CN110220324B CN201810169958.1A CN201810169958A CN110220324B CN 110220324 B CN110220324 B CN 110220324B CN 201810169958 A CN201810169958 A CN 201810169958A CN 110220324 B CN110220324 B CN 110220324B
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- valve
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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
- F25B13/00—Compression machines, plants or systems, with 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/26—Disposition of valves, e.g. of on-off valves or flow control valves of fluid flow reversing valves
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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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention provides a four-way valve and an air conditioning system. The four-way valve is used for an air conditioning system and comprises a main valve body (1) and a first pilot valve (2), wherein the main valve body (1) comprises an interface C, an interface D, an interface E and an interface S, the first pilot valve (2) comprises an interface C ', an interface D ', an interface E ' and an interface S ', the interface C ' of the first pilot valve (2) is connected to a first valve core driving end of the main valve body (1) through a first signal pipe (3), the interface E ' of the first pilot valve (2) is connected to a second valve core driving end of the main valve body (1) through a second signal pipe (4), the interface D ' of the first pilot valve (2) is connected with a third signal pipe (5), and the other end of the third signal pipe (5) is used for being connected to a pipeline between an oil separator (16) of the air conditioning system and an exhaust port of a compressor (14). According to the four-way valve disclosed by the invention, the problem of long switching time of the four-way valve caused by pressure balance at two ends of the piston in the switching process of the four-way valve can be effectively avoided, and the switching efficiency of the four-way valve is ensured.
Description
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to a four-way valve and an air conditioning system.
Background
The four-way valve is arranged in the heat pump type air conditioning system and used for changing the flow direction of the refrigerant, achieving the purposes of switching between cooling and heating and switching over the four-way valve for defrosting during heating.
The four-way valve generally adjusts the position of the valve element through the pilot valve, the pilot valve has four interfaces, D ', E', C ', and S', the four-way valve has four interfaces, D, E, C, S, wherein interface C 'is connected to the first valve element driving end of the four-way valve through a first signal pipe, interface E' is connected to the second valve element driving end of the four-way valve through a second signal pipe, interface D 'is connected to interface D through a third signal pipe, and interface S' is connected to the port of interface S through a fourth signal pipe.
When the four-way valve is switched, when the piston moves to the middle section of the cylinder body, D, C, E, S four interfaces are communicated, the pressure of the D interface is rapidly reduced, so that the pressure of the D interface and the pressure of the S interface are balanced, the pressure of two ends of the piston is balanced due to the fact that the fourth signal pipe is communicated with the S interface and is communicated with the first valve core driving end through the first signal pipe, the third signal pipe is communicated with the D interface and is communicated with the B cavity through the second signal pipe, and the switching time of the four-way valve is prolonged, so that the low-pressure-difference alarm shutdown fault of a unit is caused.
Disclosure of Invention
The invention aims to provide a four-way valve and an air conditioning system, which can effectively avoid the problem of long switching time of the four-way valve caused by pressure balance at two ends of a piston in the switching process of the four-way valve and ensure the switching efficiency of the four-way valve.
In order to solve the above technical problem, as an aspect of the present invention, there is provided a four-way valve for an air conditioning system, including a main valve body and a first pilot valve, the main valve body includes a port C, a port D, a port E, and a port S, the first pilot valve includes a port C ', a port D ', a port E ', and a port S ', the port C ' of the first pilot valve is connected to a first valve element driving end of the main valve body through a first signal pipe, the port E ' of the first pilot valve is connected to a second valve element driving end of the main valve body through a second signal pipe, the port D ' of the first pilot valve is connected to a third signal pipe, and another end of the third signal pipe is used for being connected to a pipeline between an oil separator of the air conditioning system and an exhaust port of a compressor.
According to the four-way valve, the interface D' of the first pilot valve is connected to a pipeline between an oil separator of an air-conditioning system and an exhaust port of a compressor, so that when the air-conditioning system finishes defrosting and the main valve body of the four-way valve is switched, the pressure at the interface D is reduced, the pressure of a refrigerant in the oil separator is consumed firstly, the pressure of the pipeline before the oil separator and the exhaust port of the compressor cannot be reduced rapidly along with the pressure, and the third signal pipe is communicated to the pipeline between the oil separator and the exhaust port of the compressor, so that pressure balance caused by air blowby at the driving end of the first valve core and the driving end of the second valve core of the main valve body can be avoided, a piston can be moved continuously to be switched in place, and the switching efficiency of the four-way valve is ensured.
Drawings
Fig. 1 schematically illustrates a structural schematic diagram of an air conditioning system according to an embodiment of the present invention;
fig. 2 schematically illustrates an operation of an air conditioning system according to a first embodiment of the present invention;
fig. 3 schematically shows an operation of an air conditioning system according to a second embodiment of the present invention.
1. A main valve body; 2. a first pilot valve; 3. a first signal tube; 4. a second signal tube; 5. a third signal tube; 6. a fourth signal tube; 7. a fifth signal tube; 8. a sixth signal tube; 9. a seventh signal tube; 10. an eighth signal tube; 11. a second pilot valve; 12. an indoor heat exchanger; 13. an outdoor heat exchanger; 14. a compressor; 15. a throttling device; 16. an oil separator; 17. a four-way valve; 18. a reservoir; 19. a first check valve; 20. a second one-way valve; 21. a third check valve; 22. a fourth check valve; 23. drying the filter; 24. a gas-liquid separator.
Detailed Description
The following detailed description of embodiments of the invention, but the invention can be practiced in many different ways, as defined and covered by the claims.
Referring to fig. 1 to 3 in combination, according to an embodiment of the present invention, a four-way valve is used for an air conditioning system, the four-way valve includes a main valve body 1 and a first pilot valve 2, the main valve body 1 includes a port C, a port D, a port E and a port S, the first pilot valve 2 includes a port C ', a port D ', a port E ' and a port S ', the port C ' of the first pilot valve 2 is connected to a first spool driving end of the main valve body 1 through a first signal pipe 3, the port E ' of the first pilot valve 2 is connected to a second spool driving end of the main valve body 1 through a second signal pipe 4, the port D ' of the first pilot valve 2 is connected to a third signal pipe 5, and the other end of the third signal pipe 5 is used for connecting to a pipeline between an oil separator 16 of the air conditioning system and an exhaust port of a compressor 14.
According to the four-way valve, the interface D' of the first pilot valve 2 is connected to a pipeline between the oil separator 16 of the air-conditioning system and the exhaust port of the compressor 14, when the main valve body of the four-way valve is switched after the defrosting of the air-conditioning system is finished, the pressure at the interface D is reduced, the pressure of refrigerant in the oil separator 16 is consumed firstly, the pressure of the pipeline before the oil separator 16 and the exhaust port of the compressor 14 cannot be reduced rapidly along with the pressure, the third signal pipe 5 is communicated to the pipeline between the oil separator 16 and the exhaust port of the compressor 14, the pressure balance caused by air leakage at the driving end of the first valve core and the driving end of the second valve core of the main valve 1 can be avoided, the piston can be moved continuously to the switching position, and the switching efficiency of the four-way valve is guaranteed.
Preferably, the interface C, the interface D, the interface E and the interface S are arranged in a cross shape; and/or the interface C ', the interface D', the interface E 'and the interface S' are arranged in a cross shape.
Referring to fig. 2 in combination, according to the first embodiment of the present invention, the first pilot valve 2 is an electromagnetic valve, and the state switching of the main valve body 1 can be controlled by the first pilot valve 2, so that the control is simple and convenient. Because the regulation of first pilot valve 2 is electromagnetic adjustment, consequently can not receive the influence of refrigerant pressure, can improve regulation efficiency.
Referring to fig. 3 in combination, according to a second embodiment of the present invention, the four-way valve further comprises a second pilot valve 11, the second pilot valve 11 being used to control the spool position of the first pilot valve 2.
The second pilot valve 11 is an electromagnetic valve, the first pilot valve 2 is a hydraulic control valve, and the valve element position of the first pilot valve 2 is controlled by the second pilot valve 11, the second pilot valve 11 includes an interface C ", an interface D", an interface E "and an interface S", the interface C "of the second pilot valve 11 is connected to the first valve element driving end of the first pilot valve 2 through a fifth signal pipe 7, the interface E" of the second pilot valve 11 is connected to the second valve element driving end of the first pilot valve 2 through a sixth signal pipe 8, and the interface S "of the second pilot valve 11 is connected to the interface S' of the first pilot valve 2 through an eighth signal pipe 10.
Preferably, the interface D "of the second pilot valve 11 is connected to D' of the first pilot valve 2 through a seventh signal pipe 9; or, the interface D ″ of the second pilot valve 11 is used to be connected to a pipe between the oil separator 16 of the air conditioning system and the exhaust port of the compressor 14 through the seventh signal pipe 9. When the interface D ″ of the second pilot valve 11 is used for being connected to a pipeline between the oil separator 16 of the air conditioning system and the suction port of the compressor 14 through the seventh signal pipe 9, because the first pilot valve 2 also utilizes the refrigerant pressure to adjust the position of the valve element, and the interface D ″ of the second pilot valve 11 and the interface D' of the first pilot valve 2 are communicated with the exhaust port of the compressor 14 together and are not communicated with the interface D of the main valve body 1, therefore, the pressure inside the two hydraulic driving ends of the first pilot valve 2 can be ensured not to be communicated to cause the pressure balance at the two ends of the first pilot valve 2, so that the piston of the first pilot valve 2 can continuously move to be switched in place, and the smooth switching of the four-way valve is ensured.
Referring to fig. 1 to 3 in combination, according to an embodiment of the present invention, the air conditioning system includes an indoor heat exchanger 12, an outdoor heat exchanger 13, a compressor 14, a throttling device 15, an oil separator 16, a gas-liquid separator 24, and a four-way valve 17, the four-way valve 17 is a four-way valve as described above, and one end of a third signal pipe 5 of the four-way valve 17 is connected to a port D' of the first pilot valve 2, and the other end is connected to a pipe between the oil separator 16 and an exhaust port of the compressor 14.
In this embodiment, the air conditioning system further includes a reservoir 18, a first check valve 19, a second check valve 20, a third check valve 21, and a fourth check valve 22, wherein the first check valve 19 and the third check valve 21 form a first series line, the second check valve 20 and the fourth check valve 22 form a second series line, the first series line and the second series line are connected in parallel, the outdoor heat exchanger 13 is connected between the first check valve 19 and the fourth check valve 22, the indoor heat exchanger 12 is connected between the second check valve 20 and the third check valve 21, an air inlet of the reservoir 18 is connected between the first check valve 19 and the second check valve 20, and a liquid outlet of the reservoir 18 is connected between the third check valve 21 and the fourth check valve 22. The liquid storage device 18 can receive gas, liquid or mixed refrigerant after condensing and heat exchanging from the condenser, then liquid refrigerant is discharged from the liquid outlet of the liquid storage device 18, the liquefying effect of the refrigerant is guaranteed, the refrigerant discharged from the liquid storage device 18 is guaranteed to be pure liquid refrigerant, the energy storage effect of the refrigerant is improved, the heat exchange quantity of the refrigerant is improved, and the refrigerating or heating effect of the refrigerant is improved.
Because of the existence of the four check valves, when the air conditioning system is in a refrigeration state, after the refrigerant flows out of the outdoor heat exchanger 13, the refrigerant enters the liquid reservoir 18 from the air inlet of the liquid reservoir 18 through the first check valve 19, under the pressure action of the refrigerant, the liquid refrigerant in the liquid reservoir 18 flows out of the liquid outlet of the liquid reservoir 18, flows into the indoor heat exchanger 12 through the third check valve 21 to exchange heat, refrigerates indoors, and after the refrigerant exchanging heat with the indoor heat exchanger 12 passes through the interface E and the interface S of the four-way valve, gas-liquid separation is performed in the gas-liquid separator 24, and then the refrigerant flows back to the air suction port of the compressor 14. When the air conditioning system is in a heating state, the refrigerant firstly enters the indoor heat exchanger 12, exchanges heat with the indoor air in the indoor heat exchanger 12 to heat the indoor air, and after flowing out of the indoor heat exchanger 12, the refrigerant enters the liquid reservoir 18 from the air inlet of the liquid reservoir 18 through the second one-way valve 20, under the pressure action of the refrigerant, the liquid refrigerant in the liquid reservoir 18 flows out of the liquid outlet of the liquid reservoir 18, flows into the outdoor heat exchanger 13 through the fourth one-way valve 22 to exchange heat, and after passing through the interface C and the interface S of the four-way valve, the refrigerant exchanging heat with the outdoor heat exchanger 13 is subjected to gas-liquid separation in the gas-liquid separator 24 and then flows back to the air suction port of the compressor 14.
Be provided with drier-filter 23 and solenoid valve on the liquid outlet pipeline of reservoir 18, can carry out the drying and filtering to the liquid refrigerant from reservoir 18 exhaust, avoid the refrigerant to flow the in-process and carry other impurity, guarantee the pure and clean degree of refrigerant, improve the heat exchange efficiency between refrigerant and the heat exchanger.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A four-way valve is used for an air conditioning system and is characterized by comprising a main valve body (1) and a first pilot valve (2), the main valve body (1) comprises a port C, a port D, a port E and a port S, the first pilot valve (2) comprises a port C ', a port D', a port E 'and a port S', the interface C' of the first pilot valve (2) is connected to the first valve core driving end of the main valve body (1) through a first signal pipe (3), the interface E' of the first pilot valve (2) is connected to the second valve core driving end of the main valve body (1) through a second signal pipe (4), a port D' of the first pilot valve (2) is connected with a third signal pipe (5), the other end of the third signal pipe (5) is used for being connected to a pipeline between an oil separator (16) of an air conditioning system and an exhaust port of a compressor (14).
2. Four-way valve according to claim 1, wherein the first pilot valve (2) is a solenoid valve.
3. The four-way valve according to claim 1, further comprising a second pilot valve (11), the second pilot valve (11) being adapted to control the spool position of the first pilot valve (2).
4. The four-way valve according to claim 3, wherein the second pilot valve (11) is a solenoid valve, the second pilot valve (11) comprises a port C ", a port D", a port E "and a port S", the port C "of the second pilot valve (11) is connected to the first spool driving end of the first pilot valve (2) through a fifth signal pipe (7), the port E" of the second pilot valve (11) is connected to the second spool driving end of the first pilot valve (2) through a sixth signal pipe (8), and the port S "of the second pilot valve (11) is connected to the port S' of the first pilot valve (2) through an eighth signal pipe (10).
5. The four-way valve according to claim 4, wherein the interface D "of the second pilot valve (11) is connected to D' of the first pilot valve (2) by a seventh signal pipe (9); or the interface D' of the second pilot valve (11) is used for being connected to a pipeline between an oil separator (16) of an air conditioning system and an exhaust port of a compressor (14) through a seventh signal pipe (9).
6. The four-way valve according to claim 1, wherein the interface C, the interface D, the interface E and the interface S are arranged in a cross shape; and/or the interface C ', the interface D', the interface E 'and the interface S' are arranged in a cross shape.
7. An air conditioning system comprising an indoor heat exchanger (12), an outdoor heat exchanger (13), a compressor (14), a throttling device (15), an oil separator (16) and a four-way valve (17), wherein the four-way valve (17) is the four-way valve as claimed in any one of claims 1 to 6, one end of a third signal pipe (5) of the four-way valve (17) is connected to a port D' of the first pilot valve (2), and the other end is connected to a pipeline between the oil separator (16) and an exhaust port of the compressor (14).
8. Air conditioning system according to claim 7, characterized in that it further comprises an accumulator (18), a first non-return valve (19), a second non-return valve (20), a third non-return valve (21) and a fourth non-return valve (22), wherein the first non-return valve (19) and the third non-return valve (21) form a first series line, the second non-return valve (20) and the fourth non-return valve (22) form a second series line, the first series line and the second series line being parallel, the outdoor heat exchanger (13) being connected between the first non-return valve (19) and the fourth non-return valve (22), the indoor heat exchanger (12) being connected between the second non-return valve (20) and the third non-return valve (21), the accumulator (18) having an inlet connected between the first non-return valve (19) and the second non-return valve (20), the liquid outlet of the reservoir (18) is connected between the third one-way valve (21) and the fourth one-way valve (22).
9. Air conditioning system according to claim 8, characterized in that a drying filter (23) and a solenoid valve are provided on the liquid outlet line of the reservoir (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810169958.1A CN110220324B (en) | 2018-03-01 | 2018-03-01 | Four-way valve and air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810169958.1A CN110220324B (en) | 2018-03-01 | 2018-03-01 | Four-way valve and air conditioning system |
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| Publication Number | Publication Date |
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| CN110220324A CN110220324A (en) | 2019-09-10 |
| CN110220324B true CN110220324B (en) | 2021-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810169958.1A Active CN110220324B (en) | 2018-03-01 | 2018-03-01 | Four-way valve and air conditioning system |
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| CN (1) | CN110220324B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901259A (en) * | 2012-10-31 | 2013-01-30 | 南京五洲制冷集团有限公司 | Double-machine double-stage compression refrigeration unit |
| CN106352111A (en) * | 2015-07-15 | 2017-01-25 | 浙江盾安禾田金属有限公司 | Electromagnetic pilot type three-way valve and air conditioning system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7191604B1 (en) * | 2004-02-26 | 2007-03-20 | Earth To Air Systems, Llc | Heat pump dehumidification system |
| CN202612713U (en) * | 2012-06-30 | 2012-12-19 | 浙江盾安禾田金属有限公司 | Electromagnetic directional valve |
| CN104266416B (en) * | 2014-09-29 | 2017-03-15 | 特灵空调系统(中国)有限公司 | Multi-connected machine throttling and supercooling controlling organization |
| CN104832679B (en) * | 2015-05-15 | 2020-04-21 | 浙江三花智能控制股份有限公司 | Refrigerating system and electromagnetic four-way valve thereof |
-
2018
- 2018-03-01 CN CN201810169958.1A patent/CN110220324B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901259A (en) * | 2012-10-31 | 2013-01-30 | 南京五洲制冷集团有限公司 | Double-machine double-stage compression refrigeration unit |
| CN106352111A (en) * | 2015-07-15 | 2017-01-25 | 浙江盾安禾田金属有限公司 | Electromagnetic pilot type three-way valve and air conditioning system |
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| CN110220324A (en) | 2019-09-10 |
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