CN107091540B - Four-way reversing valve with bypass function and working mode thereof - Google Patents

Four-way reversing valve with bypass function and working mode thereof Download PDF

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Publication number
CN107091540B
CN107091540B CN201710355232.2A CN201710355232A CN107091540B CN 107091540 B CN107091540 B CN 107091540B CN 201710355232 A CN201710355232 A CN 201710355232A CN 107091540 B CN107091540 B CN 107091540B
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pipe orifice
valve
main valve
pressure air
low
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CN107091540A (en
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林杰
吴建华
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Xian Jiaotong University
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Xian Jiaotong University
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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0603—Multiple-way valves
    • F16K31/061—Sliding valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
    • F16K31/1221—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being spring-loaded
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
    • F16K31/1225—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston with a plurality of pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
    • F16K31/363—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor the fluid acting on a piston
    • 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
    • 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
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/37—Capillary tubes
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Multiple-Way Valves (AREA)

Abstract

A four-way reversing valve with a bypass function and a working mode thereof are disclosed, wherein the four-way reversing valve comprises a main valve, a guide valve and a capillary tube for connecting the main valve and the guide valve; the main valve comprises a sliding block, a left piston and a right piston which are arranged at two ends of the sliding block, a left cavity is enclosed by the left piston and the main valve shell, a right cavity is enclosed by the right piston and the main valve shell, and a left spring and a right spring are respectively arranged in the left cavity and the right cavity; the guide valve comprises a sliding bowl, an iron core connected with the sliding bowl, a spring connected with the iron core and a guide valve shell, and an electromagnetic coil wound outside the guide valve shell; the first capillary is connected with a high-pressure air inlet pipe orifice of the guide valve and a high-pressure air inlet pipe orifice of the main valve, the second capillary is connected with a low-pressure air outlet pipe orifice of the guide valve and a low-pressure air outlet pipe orifice of the main valve, the third capillary is connected with a left reversing pipe orifice of the guide valve and a left cavity of the main valve, and the fourth capillary is connected with a right reversing pipe orifice of the guide valve and a right cavity of the main valve; the invention also discloses a working mode of the four-way reversing valve; the low-filling heat pump system can avoid the over-low suction pressure in the cold starting and defrosting processes.

Description

Four-way reversing valve with bypass function and working mode thereof
Technical Field
The invention belongs to the technical field of valves for air conditioners, and particularly relates to a four-way reversing valve with a bypass function and a working mode thereof.
Background
Hydrofluorocarbon (HFC) refrigerants have been widely used in household air conditioners and medium-and small-sized commercial air conditioners. However, since these refrigerants have a high greenhouse effect index (GWP) and thus have a large influence on the environment, related companies in various countries have started using refrigerants having a low GWP value from the viewpoint of global warming control. Therefore, it has been proposed to use a refrigerant that has little effect on global warming, such as R1234yf of Hydrofluoroolefins (HFO) and R290, R600a, R1270 of Hydrocarbons (HC). However, unlike conventional HFC refrigerants, these refrigerants have a problem of being more or less flammable (or slightly flammable).
In the air conditioning system using the flammable refrigerant, if the refrigerant leaks in a room and has a high concentration, accidents such as fire disasters are likely to occur. Therefore, in order to solve the problem of flammability of the refrigerant and put an end to potential safety hazards, enterprises reduce the filling amount of the refrigerant in the system. Series stability and reliability issues continue to arise as the refrigerant charge in the system decreases.
One of the most prominent problems is that the suction pressure of the compressor is very low during cold start and defrosting, and sometimes even negative pressure (lower than atmospheric pressure) occurs. The occurrence of negative pressure may cause the air cooling system to be prone to explosion caused by air entering the system on one hand, and affect the reliability of the compressor and the cooling system on the other hand.
One of the methods for preventing the negative pressure is to connect the suction pipes and the exhaust pipes, and if the connecting pipes are added, the manufacturing and installation costs are increased. The existing four-way reversing valve is used in a refrigerating system and has the function of changing the flowing direction of a refrigerant to realize the conversion between a refrigerating mode and a heating mode, and the function of communicating air suction and exhaust is not provided. Therefore, it is necessary to modify the existing four-way reversing valve to have a bypass function, so as to avoid the suction pressure from being too low.
Disclosure of Invention
The invention aims to solve the problems and aims to provide a four-way reversing valve with a bypass function and a working mode thereof, so that the low-filling heat pump system is prevented from generating too low suction pressure in the cold starting and defrosting processes.
In order to achieve the purpose, the invention adopts the following technical scheme:
a four-way reversing valve with a bypass function comprises a main valve 10, a pilot valve 20 and a capillary tube for connecting the main valve 10 and a control valve 20; the main valve 10 comprises a main valve shell, a sliding block 11 arranged in the main valve shell, a left piston 12a and a right piston 12b which are arranged at two ends of the sliding block 11 and connected with the sliding block 11, a left cavity 15 is enclosed by the left piston 12a and the main valve shell, a right cavity 16 is enclosed by the right piston 12b and the main valve shell, a left spring 13a and a right spring 13b are respectively arranged in the left cavity 15 and the right cavity 16, a main valve high-pressure air inlet pipe orifice D connected with an exhaust port of the compressor 01 is arranged at the top of the main valve shell, a main valve low-pressure air outlet pipe orifice S connected with the gas-liquid separator 02 is arranged at the bottom of the main valve shell, a main valve left reversing pipe orifice E connected with an outlet of the indoor heat exchanger 03 is arranged at the left end of the main valve low-pressure air outlet pipe orifice S, and a main valve right reversing pipe orifice C connected with an inlet of the outdoor heat exchanger 05 is arranged at the right end; through holes are arranged at two ends of the main valve 10, so that capillaries at the two ends are communicated with the space in the main valve body 10;
the guide valve 20 comprises a guide valve shell, a sliding bowl 21 arranged in the guide valve shell, an iron core 22 connected with the sliding bowl 21, a spring 23 connected with the iron core 22 and the guide valve shell, and an electromagnetic coil 24 wound outside the guide valve shell; the top of the guide valve shell is provided with a guide valve high-pressure air inlet pipe orifice d, the bottom of the guide valve shell is provided with a guide valve low-pressure air outlet pipe orifice s, the left end of the guide valve low-pressure air outlet pipe orifice s is provided with a guide valve left reversing pipe orifice e, and the right end of the guide valve low-pressure air outlet pipe orifice s is provided with a guide valve right reversing pipe orifice c; the first capillary (1) is connected with a high-pressure air inlet pipe orifice D of the guide valve and a high-pressure air inlet pipe orifice D of the main valve, the second capillary (2) is connected with a low-pressure air outlet pipe orifice S of the guide valve and a low-pressure air outlet pipe orifice S of the main valve, the third capillary (3) is connected with a left reversing pipe orifice e of the guide valve and a left cavity 16 of the main valve (10), and the fourth capillary (4) is connected with a right reversing pipe orifice c of the guide valve and a right cavity 16 of the main valve 10.
The four-way reversing valve with the bypass function has the following working modes:
a cooling mode: when the electromagnetic coil 24 of the guide valve 20 of the four-way reversing valve is electrified, the iron core 22 is repelled to overcome the resistance of the spring 23 in the guide valve 20 and move to the leftmost end, at this time, the left reversing pipe orifice e of the guide valve 20 is communicated with the low-pressure air outlet pipe orifice s of the guide valve, and the right reversing pipe orifice c of the guide valve is communicated with the high-pressure air inlet pipe orifice d of the guide valve; because the low-pressure air outlet pipe orifice S of the guide valve is communicated with the low-pressure air outlet pipe orifice S of the main valve through the second capillary (2), and the low-pressure air outlet pipe orifice S of the main valve is connected with the gas-liquid separator 2 and then is connected with the air suction port of the compressor 1 to form low pressure, the left reversing pipe orifice e of the guide valve is low pressure, and therefore, a left cavity 15 of the main valve 10 connected with the left reversing pipe orifice e of the guide valve is a low-pressure cavity; similarly, since the high-pressure inlet pipe orifice D of the pilot valve is communicated with the high-pressure inlet pipe orifice D of the main valve through the first capillary (1), and the high-pressure inlet pipe orifice D of the main valve is connected with the exhaust port of the compressor 1 to be high-pressure, the high-pressure inlet pipe orifice D of the pilot valve is high-pressure, and therefore, the right cavity 16 of the main valve 10 connected with the right reversing pipe orifice c of the pilot valve is a high-pressure cavity; the pressures of the high-low pressure cavities act on a left piston 12a and a right piston 12b of the main valve 10 respectively, so that the slide block 11 moves leftwards under the action of pressure difference and against the action of a left spring 13a in the left cavity 15 and a right spring 13b in the right cavity 16; the slide block 11 connects the main valve left reversing pipe orifice E with the main valve low pressure air outlet pipe orifice S, and then the main valve high pressure air inlet pipe orifice D is connected with the main valve right reversing pipe orifice C through the space in the main valve 10; therefore, in the system refrigerant cycle in this mode, the refrigerant gas after heat absorption and evaporation in the indoor heat exchanger 03 is connected with the left reversing pipe orifice E of the main valve through the connecting pipe, turns in the main valve 10, flows out through the low-pressure air outlet pipe orifice S of the main valve, then enters the compressor 1 through the gas-liquid separator 2, the gaseous refrigerant discharged from the compressor 1 flows into the high-pressure air inlet pipe orifice D of the main valve, flows out from the right reversing pipe orifice C of the main valve after reversing in the main valve 10, then enters the outdoor heat exchanger 05 to be condensed into a liquid state, and then flows into the indoor heat exchanger 03 to absorb heat and refrigerate after throttling through the throttle valve 04, thereby completing the refrigeration cycle;
heating mode: when the electromagnetic coil 24 of the guide valve 20 of the four-way reversing valve is not electrified, the iron core 22 moves to the middle position under the action of the spring 23, at this time, the left reversing pipe orifice e of the guide valve is communicated with the high-pressure air inlet pipe orifice d of the guide valve, and the right reversing pipe orifice c of the guide valve is communicated with the low-pressure air outlet pipe orifice s of the guide valve; because the low-pressure air outlet pipe orifice S of the guide valve is communicated with the low-pressure air outlet pipe orifice S of the main valve through the second capillary (2), and the low-pressure air outlet pipe orifice S of the main valve is connected with the gas-liquid separator 2 and then is connected with the air suction port of the compressor 1 to form low pressure, the right reversing pipe orifice c of the guide valve is low pressure, and therefore the right cavity 16 of the main valve 10 connected with the right reversing pipe orifice c of the guide valve is a low-pressure cavity; similarly, since the high-pressure inlet pipe orifice D of the pilot valve is communicated with the high-pressure inlet pipe orifice D of the main valve through the first capillary (1), and the high-pressure inlet pipe orifice D of the main valve is connected with the exhaust port of the compressor 1 to be high-pressure, the high-pressure inlet pipe orifice D of the pilot valve is high-pressure, and therefore, the left cavity 15 of the main valve 10 connected with the left reversing pipe orifice e of the pilot valve is a high-pressure cavity; the pressures of the high-pressure and low-pressure cavities act on a left piston 12a and a right piston 12b of the main valve 10 respectively, so that the slide block 11 moves rightwards under the action of pressure difference and against the action of a spring 13a in the left cavity 15 and a spring 13b in the right cavity 16; the slide block 11 connects the main valve right reversing pipe orifice C with the main valve low pressure air outlet pipe orifice S, and then the main valve high pressure air inlet pipe orifice D is connected with the main valve left reversing pipe orifice E through the space in the main valve 10; therefore, in the system refrigerant cycle in this mode, the refrigerant gas after heat absorption and evaporation in the outdoor heat exchanger 05 is connected with the right reversing pipe orifice C of the main valve through the connecting pipe, turns inside the main valve 10, flows out through the low-pressure air outlet pipe orifice S of the main valve, then enters the compressor 1 through the gas-liquid separator 2, the gaseous refrigerant discharged from the compressor 1 flows into the high-pressure air inlet pipe orifice D of the main valve, flows out from the left reversing pipe orifice E of the main valve after reversing inside the main valve 10, then enters the indoor heat exchanger 03 to release heat and condense into liquid, and then flows into the outdoor heat exchanger 05 to absorb heat after throttling by the throttle valve 04, so as to complete the heating cycle;
bypass mode: when the electromagnetic coil 24 of the guide valve 20 of the four-way reversing valve is electrified reversely, the iron core 22 moves to the rightmost end under the action of the spring 23, and the left reversing pipe orifice e of the guide valve, the high-pressure air inlet pipe orifice d of the guide valve and the low-pressure air outlet s of the guide valve are communicated; the low-pressure air outlet pipe orifice S of the guide valve is communicated with the low-pressure air outlet pipe orifice S of the main valve through a second capillary tube (2), and the low-pressure air outlet pipe orifice S of the main valve is connected with the gas-liquid separator 2 and then is connected with an air suction port of the compressor 1 to form low pressure; because the high-pressure air inlet pipe orifice D of the pilot valve is communicated with the high-pressure air inlet pipe orifice D of the main valve through the first capillary (1), and the high-pressure air inlet pipe orifice D of the main valve is connected with the exhaust port of the compressor 1 to be high-pressure, the high-pressure air inlet pipe orifice D of the pilot valve is high-pressure, and therefore, a left cavity 15 of the main valve 10 connected with the left reversing pipe orifice e of the pilot valve is a high-pressure cavity; the high pressure of the left cavity 15 acts on the left piston 12a of the main valve 10 respectively, so that the slide block 11 moves rightwards under the action of pressure difference and against the action of a left spring 13a in the left cavity 15 and a right spring 13b in the right cavity 16; the slide block 11 connects the main valve right reversing pipe orifice C with the main valve low-pressure air outlet pipe orifice S, and then the main valve high-pressure air inlet pipe orifice D is connected with the main valve left reversing pipe orifice E through the space in the main valve 10; therefore, in the system refrigerant cycle in this mode, the gaseous refrigerant discharged from the compressor 1 flows into the main valve high-pressure inlet pipe orifice D, after reversing in the main valve 10, a small part of the gaseous refrigerant flows from the main valve left reversing pipe orifice E to the indoor heat exchanger 03 to be gasified by heat release, then flows into the outdoor heat exchanger 05 to be evaporated by heat release after being throttled by the throttle valve 04, and the refrigerant gas flowing from the outdoor heat exchanger 05 enters the main valve right reversing pipe orifice C, turns in the main valve 10, flows out through the main valve low-pressure outlet pipe orifice S, and then enters the compressor 1 through the gas-liquid separator 2; the other most of the refrigerant flowing into the main valve high-pressure air inlet pipe orifice D flows into the guide valve high-pressure air inlet pipe orifice D through the first capillary tube (1), flows out from the guide valve low-pressure air outlet pipe orifice S after reversing in the guide valve 20, then flows out from the main valve low-pressure air outlet pipe orifice S, and then enters the compressor 1 through the gas-liquid separator 2 to complete the refrigerant bypass process;
a small part of the refrigerant mass flow from the left reversing orifice E of the main valve can be reduced to 0 by the shut-off action of the throttle 04.
Compared with the prior art, the invention has the following advantages:
1. compared with the traditional four-way reversing valve which only has two functions of forward communication and backward communication, the novel four-way reversing valve provided by the invention is additionally provided with a bypass function on the original basis.
2. The novel four-way reversing valve provided by the invention can effectively solve the problem of over-low suction pressure in the starting process of the compressor, and does not need to increase the cost of other structures.
Drawings
FIG. 1 shows the working principle of the four-way reversing valve of the present invention when the air conditioner is in the cooling mode.
FIG. 2 is the working principle of the four-way reversing valve of the present invention when the air conditioner is in the heating mode.
FIG. 3 is the working principle of the four-way reversing valve of the present invention when the air conditioner is in the air suction and exhaust communication mode.
Detailed description of the preferred embodiments
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
The specific structure of the invention is shown in figure 1. The air conditioner system is composed of a compressor 01, a liquid storage device 02, an indoor heat exchanger 03, a throttle valve 04, an outdoor heat exchanger 05 and a four-way reversing valve 06. The four-way reversing valve 06 structure of the invention mainly comprises a main valve 10, a guide valve 20 and four capillary tubes ((1), (2), (3) and (4)); a high-pressure air inlet pipe D of the main valve 10 is connected with an air outlet of a compressor 01, a left reversing pipe E is connected with an outlet of an indoor heat exchanger 03, a right reversing pipe orifice C is connected with an inlet of an outdoor heat exchanger 05, and a low-pressure air outlet pipe orifice S is connected with a gas-liquid separator 02; the main valve 10 is internally provided with a slide block 11, a left piston 12a, a right piston 12b, a left spring 13a and a right spring 13b; through holes are arranged at two ends of the main valve 10, so that a third capillary tube (3) and a fourth capillary tube (4) at the two ends can be communicated with the space in the main valve body 10. The guide valve 20 is composed of a slide bowl 21, an iron core 22, a spring 23 and an electromagnetic coil 24 wound outside the guide valve 20. The first capillary tube (1) is connected with a high-pressure air inlet pipe orifice D of the guide valve and a high-pressure air inlet pipe orifice D of the main valve; the second capillary (2) is connected with a low-pressure air outlet pipe orifice S of the guide valve 20 and a main valve pressure air suction pipe orifice S; the third capillary (3) is connected with a left reversing pipe orifice e of the pilot valve and a left cavity 14 of the main valve 10; and a fourth capillary (4) is connected with a right reversing orifice c of the pilot valve and a right cavity 16 of the main valve 10.
The main working modes of the invention are as follows:
as shown in fig. 1, cooling mode: when the solenoid 24 of the pilot valve 20 of the four-way reversing valve is energized, the plunger 22 is repelled against the resistance of the spring 23 in the pilot valve 20 and moves to the leftmost end. At this time, a guide valve left reversing pipe orifice e of the guide valve 20 is communicated with a guide valve low-pressure air outlet pipe orifice s, and a guide valve right reversing pipe orifice c is communicated with a guide valve high-pressure air inlet pipe orifice d; because the low-pressure air outlet pipe orifice S of the guide valve is communicated with the low-pressure air outlet pipe orifice S of the main valve through the second capillary (2), and the low-pressure air outlet pipe orifice S of the main valve is connected with the gas-liquid separator 2 and then is connected with the air suction port of the compressor 1 to form low pressure, the left reversing pipe orifice e of the guide valve is low pressure, and therefore, the left cavity 15 of the main valve 10 connected with the left reversing pipe orifice e of the guide valve is a low-pressure cavity. Similarly, since the pilot valve high pressure inlet pipe orifice D is communicated with the main valve high pressure inlet pipe orifice D through the first capillary (1), and the main valve high pressure inlet pipe orifice D is connected with the exhaust port of the compressor 1 at high pressure, the pilot valve high pressure inlet pipe orifice D is at high pressure, and therefore, the right cavity 16 of the main valve 10 connected with the pilot valve right reversing pipe orifice c is a high pressure cavity. The pressures of the high and low pressure chambers act on the left piston 12a and the right piston 12b of the main valve 10, respectively, so that the slider 11 moves to the left under the action of the pressure difference against the action of the left spring 13a in the left chamber 15 and the right spring 13b in the right chamber 16. The slide block 11 connects the main valve left reversing pipe orifice E with the main valve low pressure air outlet pipe orifice S, and then the main valve high pressure air inlet pipe orifice D is connected with the main valve right reversing pipe orifice C through the space in the main valve 10; therefore, in the system refrigerant cycle in this mode, the refrigerant gas after heat absorption and evaporation in the indoor heat exchanger 03 is connected with the left reversing pipe orifice E of the main valve through the connecting pipe, turns in the main valve 10, flows out through the low-pressure air outlet pipe orifice S of the main valve, then enters the compressor 1 through the gas-liquid separator 2, the gaseous refrigerant discharged from the compressor 1 flows into the high-pressure air inlet pipe orifice D of the main valve, flows out from the right reversing pipe orifice C of the main valve after reversing in the main valve 10, then enters the outdoor heat exchanger 05 to be condensed into a liquid state, and then flows into the indoor heat exchanger 03 to absorb heat and refrigerate after throttling by the throttle valve 04, thereby completing the refrigeration cycle.
As shown in fig. 2, heating mode: when the solenoid 24 of the pilot valve 20 of the four-way selector valve is de-energized, the plunger 22 is moved to the neutral position by the spring 23. At the moment, the left reversing pipe orifice e of the guide valve is communicated with the high-pressure air inlet pipe orifice d of the guide valve, and the right reversing pipe orifice c of the guide valve is communicated with the low-pressure air outlet pipe orifice s of the guide valve; because the low-pressure air outlet pipe orifice S of the guide valve is communicated with the low-pressure air outlet pipe orifice S of the main valve through the second capillary (2), and the low-pressure air outlet pipe orifice S of the main valve is connected with the gas-liquid separator 2 and then is connected with the air suction port of the compressor 1 to form low pressure, the right reversing pipe orifice c of the guide valve is low pressure, and therefore the right cavity 16 of the main valve 10 connected with the right reversing pipe orifice c of the guide valve is a low-pressure cavity. Similarly, since the pilot valve high pressure inlet pipe orifice D is communicated with the main valve high pressure inlet pipe orifice D through the first capillary (1), and the main valve high pressure inlet pipe orifice D is connected with the exhaust port of the compressor 1 at high pressure, the pilot valve high pressure inlet pipe orifice D is at high pressure, and therefore, the left cavity 15 of the main valve 10 connected with the pilot valve left reversing pipe orifice e is a high pressure cavity. The pressures of the high and low pressure chambers act on the left piston 12a and the right piston 12b of the main valve 10, respectively, so that the slider 11 moves to the right against the action of the spring 13a in the left chamber 15 and the spring 13b in the right chamber 16 under the action of the pressure difference. The slide block 11 connects the main valve right reversing pipe orifice C with the main valve low pressure air outlet pipe orifice S, and then the main valve high pressure air inlet pipe orifice D is connected with the main valve left reversing pipe orifice E through the space in the main valve 10; therefore, in the system refrigerant cycle in this mode, the refrigerant gas after heat absorption and evaporation in the outdoor heat exchanger 05 is connected with the right reversing pipe orifice C of the main valve through the connecting pipe, turns inside the main valve 10, flows out through the low-pressure air outlet pipe orifice S of the main valve, then enters the compressor 1 through the gas-liquid separator 2, the gaseous refrigerant discharged from the compressor 1 flows into the high-pressure air inlet pipe orifice D of the main valve, flows out from the left reversing pipe orifice E of the main valve after reversing inside the main valve 10, then enters the indoor heat exchanger 03 to release heat and condense into liquid, and then flows into the outdoor heat exchanger 05 to absorb heat after throttling by the throttle valve 04, thereby completing the heating cycle.
As shown in fig. 3, bypass mode: when the solenoid 24 of the pilot valve 20 of the four-way selector valve is energized in the reverse direction, the plunger 22 is moved to the rightmost end by the spring 23. At the moment, the left reversing pipe orifice e of the guide valve, the high-pressure air inlet pipe orifice d of the guide valve and the low-pressure air outlet s of the guide valve are communicated; the low-pressure air outlet pipe mouth S of the guide valve is communicated with the low-pressure air outlet pipe mouth S of the main valve through the second capillary (2), and the low-pressure air outlet pipe mouth S of the main valve is connected with the gas-liquid separator 2 and then is connected with the air suction port of the compressor 1 to form low pressure. Since the high-pressure inlet pipe orifice D of the pilot valve is communicated with the high-pressure inlet pipe orifice D of the main valve through the first capillary tube (1), and the high-pressure inlet pipe orifice D of the main valve is connected with the exhaust port of the compressor 1 to be high-pressure, the high-pressure inlet pipe orifice D of the pilot valve is high-pressure, and therefore the left cavity 15 of the main valve 10 connected with the left reversing pipe orifice e of the pilot valve is a high-pressure cavity. The high pressure of the left chamber 15 acts on the left piston 12a of the main valve 10, respectively, causing the slider 11 to move to the right under the action of the pressure difference, overcoming the action of the left spring 13a in the left chamber 15 and the right spring 13b in the right chamber 16. The slide block 11 connects the main valve right reversing pipe orifice C with the main valve low pressure air outlet pipe orifice S, and then the main valve high pressure air inlet pipe orifice D is connected with the main valve left reversing pipe orifice E through the space in the main valve 10; therefore, in the system refrigerant cycle in this mode, the gaseous refrigerant discharged from the compressor 1 flows into the main valve high-pressure inlet pipe orifice D, after reversing in the main valve 10, a small part of the gaseous refrigerant flows from the main valve left reversing pipe orifice E to the indoor heat exchanger 03 to be gasified by heat release, then flows into the outdoor heat exchanger 05 to be evaporated by heat release after being throttled by the throttle valve 04, and the refrigerant gas flowing from the outdoor heat exchanger 05 enters the main valve right reversing pipe orifice C, turns in the main valve 10, flows out through the main valve low-pressure outlet pipe orifice S, and then enters the compressor 1 through the gas-liquid separator 2; the other most of the refrigerant flowing into the main valve high pressure inlet pipe orifice D flows into the guide valve high pressure inlet pipe orifice D through the first capillary tube (1), flows out from the guide valve low pressure outlet pipe orifice S after reversing in the guide valve 20, then flows out from the main valve low pressure outlet pipe orifice S, and then enters the compressor 1 through the gas-liquid separator 2, so that the refrigerant bypass process is completed.
A small part of the refrigerant mass flow from the left reversing orifice E of the main valve can be reduced to 0 by the stopping action of the throttle valve 04.

Claims (2)

1. The utility model provides a take four-way reversing valve of bypass function which characterized in that: comprises a main valve (10), a pilot valve (20) and a capillary tube connecting the main valve (10) and the pilot valve (20); the main valve (10) comprises a main valve shell, a sliding block (11) arranged in the main valve shell, a left piston (12 a) and a right piston (12 b) which are arranged at two ends of the sliding block (11) and connected with the sliding block (11), a left cavity (15) is enclosed by the left piston (12 a) and the main valve shell, a right cavity (16) is enclosed by the right piston (12 b) and the main valve shell, a left spring (13 a) and a right spring (13 b) are respectively arranged in the left cavity (15) and the right cavity (16), a main valve high-pressure air inlet pipe orifice (D) connected with an exhaust port of the compressor (01) is arranged at the top of the main valve shell, a main valve low-pressure air outlet pipe orifice (S) connected with the gas-liquid separator (02) is arranged at the bottom of the main valve shell, a main valve reversing left pipe orifice (E) connected with an outlet of the indoor heat exchanger (03) is arranged at the left end of the main valve low-pressure air outlet pipe orifice (S), and a main valve reversing right pipe orifice (C) connected with an inlet of the outdoor heat exchanger (05) is arranged at the right end; through holes are arranged at two ends of the main valve (10) to ensure that capillary tubes at the two ends are communicated with the space in the main valve (10);
the guide valve (20) comprises a guide valve shell, a sliding bowl (21) arranged in the guide valve shell, an iron core (22) connected with the sliding bowl (21), a spring (23) connected with the iron core (22) and the guide valve shell, and an electromagnetic coil (24) wound outside the guide valve shell; a guide valve high-pressure air inlet pipe orifice (d) is arranged at the top of the guide valve shell, a guide valve low-pressure air outlet pipe orifice(s) is arranged at the bottom of the guide valve shell, a guide valve left reversing pipe orifice (e) is arranged at the left end of the guide valve low-pressure air outlet pipe orifice(s), and a guide valve right reversing pipe orifice (c) is arranged at the right end of the guide valve low-pressure air outlet pipe orifice(s); the first capillary (1) is connected with a high-pressure air inlet pipe orifice (D) of the guide valve and a high-pressure air inlet pipe orifice (D) of the main valve, the second capillary (2) is connected with a low-pressure air outlet pipe orifice (S) of the guide valve and a low-pressure air outlet pipe orifice (S) of the main valve, the third capillary (3) is connected with a left reversing pipe orifice (e) of the guide valve and a left cavity (15) of the main valve (10), and the fourth capillary ((4)) is connected with a right reversing pipe orifice (c) of the guide valve and a right cavity (16) of the main valve (10);
the pilot valve (20) of the four-way reversing valve realizes the bypass function through the following modes: when an electromagnetic coil (24) of a guide valve (20) of the four-way reversing valve is reversely electrified, an iron core (22) moves to the rightmost end under the action of a spring (23), and at the moment, a left reversing pipe orifice (e) of the guide valve, a high-pressure air inlet pipe orifice (d) of the guide valve and a low-pressure air outlet(s) of the guide valve are communicated; the low-pressure air outlet pipe orifice (S) of the guide valve is communicated with the low-pressure air outlet pipe orifice (S) of the main valve through a second capillary tube ((2)), and the low-pressure air outlet pipe orifice (S) of the main valve is connected with the gas-liquid separator (02) and then is connected with an air suction port of the compressor (01) to form low pressure; the high-pressure air inlet pipe orifice (D) of the guide valve is communicated with the high-pressure air inlet pipe orifice (D) of the main valve through a first capillary tube ((1)), and the high-pressure air inlet pipe orifice (D) of the main valve is connected with the exhaust port of the compressor (01) to be high-pressure, so that the high-pressure air inlet pipe orifice (D) of the guide valve is high-pressure, and a left cavity (15) of the main valve (10) connected with the left reversing pipe orifice (e) of the guide valve is a high-pressure cavity; the high pressure of the left cavity (15) acts on a left piston (12 a) of the main valve (10) respectively, so that the slide block (11) moves rightwards under the action of pressure difference and against the action of a left spring (13 a) in the left cavity (15) and a right spring (13 b) in the right cavity (16); the slide block (11) connects the main valve right reversing pipe orifice (C) and the main valve low pressure air outlet pipe orifice (S), then the main valve high pressure air inlet pipe orifice (D) connects the main valve left reversing pipe orifice (E) through the space in the main valve (10); therefore, in the system refrigerant circulation under the mode, gaseous refrigerant discharged by the compressor (01) flows into a main valve high-pressure air inlet pipe orifice (D), a small part of the gaseous refrigerant after reversing in the main valve (10) flows into the indoor heat exchanger (03) from a main valve left reversing pipe orifice (E) to release heat and gasify, then flows into the outdoor heat exchanger (05) to release heat and evaporate after being throttled by the throttle valve (04), refrigerant gas flowing out of the outdoor heat exchanger (05) enters a main valve right reversing pipe orifice (C), turns in the main valve (10) and flows out from a main valve low-pressure air outlet pipe orifice (S), and then enters the compressor (01) through the gas-liquid separator (02); and the other most of refrigerant flowing into the main valve high-pressure air inlet pipe orifice (D) flows into the guide valve high-pressure air inlet pipe orifice (D) through the first capillary tube ((1)), changes the direction in the guide valve (20), flows out from the guide valve low-pressure air outlet pipe orifice (S), then flows out from the main valve low-pressure air outlet pipe orifice (S), and then enters the compressor (01) through the gas-liquid separator (02) to finish the refrigerant bypass process.
2. The four-way reversing valve with bypass function of claim 1, in its operating mode, characterized in that: the system comprises a refrigeration mode, a heating mode and a bypass mode;
a refrigeration mode: when an electromagnetic coil (24) of a guide valve (20) of the four-way reversing valve is electrified, an iron core (22) is repelled to overcome the resistance of a spring (23) in the guide valve (20) and move to the leftmost end, at the moment, a left reversing pipe orifice (e) of the guide valve (20) is communicated with a low-pressure air outlet pipe orifice(s) of the guide valve, and a right reversing pipe orifice (c) of the guide valve is communicated with a high-pressure air inlet pipe orifice (d) of the guide valve; because the low-pressure air outlet pipe orifice (S) of the guide valve is communicated with the low-pressure air outlet pipe orifice (S) of the main valve through the second capillary tube ((2)), and the low-pressure air outlet pipe orifice (S) of the main valve is connected with the gas-liquid separator (02) and then is connected with the air suction port of the compressor (01) to form low pressure, the left reversing pipe orifice (e) of the guide valve is low pressure, and therefore a left cavity (15) of the main valve (10) connected with the left reversing pipe orifice (e) of the guide valve is a low-pressure cavity; similarly, the high-pressure inlet pipe orifice (D) of the pilot valve is communicated with the high-pressure inlet pipe orifice (D) of the main valve through a first capillary tube ((1)), and the high-pressure inlet pipe orifice (D) of the main valve is connected with the exhaust port of the compressor (01) to be high pressure, so that the high-pressure inlet pipe orifice (D) of the pilot valve is high pressure, and a right cavity (16) of the main valve (10) connected with the right reversing pipe orifice (c) of the pilot valve is a high-pressure cavity; the pressures of the high-pressure cavity and the low-pressure cavity respectively act on a left piston (12 a) and a right piston (12 b) of the main valve (10), so that the slide block (11) moves leftwards under the action of the pressure difference and against the action of a left spring (13 a) in a left cavity (15) and a right spring (13 b) in a right cavity (16); the slide block (11) connects the left reversing orifice (E) of the main valve with the low-pressure air outlet orifice (S) of the main valve, and the high-pressure air inlet orifice (D) of the main valve is connected with the right reversing orifice (C) of the main valve through the space in the main valve (10); therefore, in the system refrigerant circulation under the mode, refrigerant gas after heat absorption and evaporation in the indoor heat exchanger (03) is connected with a left reversing pipe orifice (E) of the main valve through a connecting pipe, turns in the main valve (10), flows out through a low-pressure air outlet pipe orifice (S) of the main valve, then enters the compressor (01) through the gas-liquid separator (02), gaseous refrigerant discharged by the compressor (01) flows into a high-pressure air inlet pipe orifice (D) of the main valve, flows out from a right reversing pipe orifice (C) of the main valve after being reversed in the main valve (10), then enters the outdoor heat exchanger (05) to be condensed into liquid, is throttled by the throttle valve (04), and then flows into the indoor heat exchanger (03) to absorb heat and refrigerate, and the refrigeration cycle is completed;
a heating mode: when an electromagnetic coil (24) of a guide valve (20) of the four-way reversing valve is not electrified, an iron core (22) moves to the middle position under the action of a spring (23), a left reversing pipe orifice (e) of the guide valve is communicated with a high-pressure air inlet pipe orifice (d) of the guide valve, and a right reversing pipe orifice (c) of the guide valve is communicated with a low-pressure air outlet pipe orifice(s) of the guide valve; because the low-pressure air outlet pipe orifice (S) of the guide valve is communicated with the low-pressure air outlet pipe orifice (S) of the main valve through the second capillary tube ((2)), and the low-pressure air outlet pipe orifice (S) of the main valve is connected with the gas-liquid separator (02) and then is connected with the air suction port of the compressor (01) to form low pressure, the right reversing pipe orifice (c) of the guide valve is low pressure, and therefore the right cavity (16) of the main valve (10) connected with the right reversing pipe orifice (c) of the guide valve is a low-pressure cavity; similarly, the high-pressure air inlet pipe orifice (D) of the pilot valve is communicated with the high-pressure air inlet pipe orifice (D) of the main valve through the first capillary tube ((1)), and the high-pressure air inlet pipe orifice (D) of the main valve is connected with the exhaust port of the compressor (01) to form high pressure, so that the high-pressure air inlet pipe orifice (D) of the pilot valve is high pressure, and a left cavity (15) of the main valve (10) connected with the left reversing pipe orifice (e) of the pilot valve is a high pressure cavity; the pressures of the high-low pressure cavity respectively act on a left piston (12 a) and a right piston (12 b) of a main valve (10), so that the slide block (11) moves rightwards under the action of pressure difference and against the action of a left spring (13 a) in a left cavity (15) and a right spring (13 b) in a right cavity (16); the slide block (11) connects the main valve right reversing pipe orifice (C) and the main valve low pressure air outlet pipe orifice (S), then the main valve high pressure air inlet pipe orifice (D) connects the main valve left reversing pipe orifice (E) through the space in the main valve (10); therefore, in the mode, the refrigerant circulation of the system is that refrigerant gas after heat absorption and evaporation in the outdoor heat exchanger (05) is connected with a right reversing pipe orifice (C) of the main valve through a connecting pipe, turns in the main valve (10), flows out through a low-pressure air outlet pipe orifice (S) of the main valve, then enters the compressor (01) through the gas-liquid separator (02), gaseous refrigerant discharged by the compressor (01) flows into a high-pressure air inlet pipe orifice (D) of the main valve, flows out from the left reversing pipe orifice (E) of the main valve after being reversed in the main valve (10), then enters the indoor heat exchanger (03) to release heat and condense into liquid, and flows into the outdoor heat exchanger (05) to absorb heat after being throttled by the throttle valve (04), so that the heating cycle is completed;
bypass mode: when an electromagnetic coil (24) of a guide valve (20) of the four-way reversing valve is reversely electrified, an iron core (22) moves to the rightmost end under the action of a spring (23), and at the moment, a left reversing pipe orifice (e) of the guide valve, a high-pressure air inlet pipe orifice (d) of the guide valve and a low-pressure air outlet(s) of the guide valve are communicated; the low-pressure air outlet pipe orifice (S) of the guide valve is communicated with the low-pressure air outlet pipe orifice (S) of the main valve through a second capillary tube ((2)), and the low-pressure air outlet pipe orifice (S) of the main valve is connected with the gas-liquid separator (02) and then is connected with an air suction port of the compressor (01) to form low pressure; the high-pressure air inlet pipe orifice (D) of the guide valve is communicated with the high-pressure air inlet pipe orifice (D) of the main valve through a first capillary tube ((1)), and the high-pressure air inlet pipe orifice (D) of the main valve is connected with the exhaust port of the compressor (01) to be high-pressure, so that the high-pressure air inlet pipe orifice (D) of the guide valve is high-pressure, and a left cavity (15) of the main valve (10) connected with the left reversing pipe orifice (e) of the guide valve is a high-pressure cavity; the high pressure of the left cavity (15) acts on a left piston (12 a) of the main valve (10) respectively, so that the slide block (11) moves rightwards under the action of pressure difference and against the action of a left spring (13 a) in the left cavity (15) and a right spring (13 b) in the right cavity (16); the slide block (11) connects the main valve right reversing pipe orifice (C) and the main valve low pressure air outlet pipe orifice (S), then the main valve high pressure air inlet pipe orifice (D) connects the main valve left reversing pipe orifice (E) through the space in the main valve (10); therefore, in the system refrigerant circulation under the mode, gaseous refrigerant discharged by the compressor (01) flows into a main valve high-pressure air inlet pipe orifice (D), a small part of the gaseous refrigerant after reversing in the main valve (10) flows into the indoor heat exchanger (03) from a main valve left reversing pipe orifice (E) to release heat and gasify, then flows into the outdoor heat exchanger (05) to release heat and evaporate after being throttled by the throttle valve (04), refrigerant gas flowing out of the outdoor heat exchanger (05) enters a main valve right reversing pipe orifice (C), turns in the main valve (10) and flows out from a main valve low-pressure air outlet pipe orifice (S), and then enters the compressor (01) through the gas-liquid separator (02); the other most of the refrigerant flowing into the main valve high-pressure air inlet pipe orifice (D) flows into the guide valve high-pressure air inlet pipe orifice (D) through the first capillary tube ((1)), changes the direction in the guide valve (20), flows out from the guide valve low-pressure air outlet pipe orifice (S), then flows out from the main valve low-pressure air outlet pipe orifice (S), and then enters the compressor (01) through the gas-liquid separator (02) to finish the refrigerant bypass process;
a small part of the refrigerant flowing out of the left reversing orifice (E) of the main valve can be reduced to 0 by the stopping action of the throttle valve (04).
CN201710355232.2A 2017-05-19 2017-05-19 Four-way reversing valve with bypass function and working mode thereof Active CN107091540B (en)

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Publication number Priority date Publication date Assignee Title
CN107990583B (en) * 2017-11-21 2023-09-08 珠海格力电器股份有限公司 Four-way valve, refrigerating system and control method of refrigerating system
CN110274052B (en) * 2018-03-13 2021-10-22 浙江三花智能控制股份有限公司 Fluid switching device and thermal management system
CN112013563B (en) * 2019-05-31 2024-05-28 浙江三花智能控制股份有限公司 Electromagnetic switching valve and heat pump system with same
CN113883763A (en) * 2021-09-23 2022-01-04 西安交通大学 Refrigeration/heat pump system for gas-liquid separation of refrigerant in front of evaporator and control method

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CN105423658A (en) * 2015-12-25 2016-03-23 西安交通大学 Four-way reversing valve with stopping function
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CN101084401A (en) * 2004-09-08 2007-12-05 开利公司 Hot gas bypass through four-way reversing valve
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