Multi-way valve for controlling pressure and flow of refrigerant

Abstract

The utility model provides a multi-way valve for controlling refrigerant pressure and flow, which belongs to the technical field of multi-way valves and comprises a hollow valve body, and the valve body is provided with a high-pressure refrigerant inlet, a low-pressure refrigerant outlet and a switch valve. A movable valve element is arranged in the valve body, and a spring cavity is formed between the end, close to the switch valve, of the valve element and the valve body. A free cavity is formed between the end, away from the switch valve, of the valve element and the valve body. According to the utility model, the switching between the refrigerating mode and the heating mode is realized through the inching of the switching valve, so that the refrigerating mode and the heating mode are integrated in one valve body; besides, the multiple cavities are formed in the valve element and matched with the multiple liquid inlets and outlets formed in the valve body, multi-channel circulation is achieved, compared with single-channel circulation in the prior art, the application range of the valve body is widened, and meanwhile the overall flow of the valve body can be increased through multi-channel circulation. According to the utility model, all channels can be completely sealed and do not interfere with each other.

Description

Technical Field

[0001] The utility model relates to the field of multi-way valves, in particular to a multi-way valve for controlling the pressure and flow of a refrigerant. Background Art

[0002] Refrigerant, commonly known as refrigerant, is a working fluid used to transfer heat energy and produce a refrigeration effect in refrigeration and air conditioning systems. However, the valve body in the prior art circulates through a single channel, which cannot achieve the switching between cooling and heating modes, and the single channel also leads to a single circulation method. For this reason, we designed a multi-way valve that controls the pressure and flow of the refrigerant. Utility Model Content

[0003] In order to make up for the above shortcomings, the utility model provides a multi-way valve for controlling the refrigerant pressure and flow, aiming to improve the problem in the prior art that the valve body circulates through a single channel, cannot realize the switching of cooling and heating modes, and the single channel also leads to a single circulation method.

[0004] The utility model is achieved in this way:

[0005] The utility model provides a multi-way valve for controlling the pressure and flow of a refrigerant, comprising a hollow valve body, wherein a high-pressure refrigerant inlet, a low-pressure refrigerant outlet and a switch valve are arranged on the valve body;

[0006] A movable valve core is arranged in the valve body, and a spring cavity is formed between the end of the valve core close to the switch valve and the valve body; a free cavity is formed between the end of the valve core away from the switch valve and the valve body;

[0007] The high-pressure refrigerant inlet is communicated with the free cavity; the low-pressure refrigerant outlet is communicated with the switch valve.

[0008] Preferably, a high-pressure channel communicating with the high-pressure refrigerant inlet is provided in the valve body, and the high-pressure channel is communicated with the free cavity via the free cavity inlet.

[0009] Preferably, a high-pressure channel communicating with the high-pressure refrigerant inlet is provided in the valve body, and the high-pressure channel is communicated with the free cavity via the free cavity inlet.

[0010] Preferably, the valve body is also provided with a compressor outlet, a C port, a G port, an F port, an H port, a B port and a D port.

[0011] Preferably, the outer wall of the valve core is provided with a C cavity, a G cavity, a compressor outlet cavity, a B cavity and a D cavity which are arranged in an annular manner in sequence.

[0012] Preferably, the C cavity is in communication with the F port and the C port;

[0013] The G cavity is in communication with the H port and the G port;

[0014] The compressor outlet cavity is in communication with the compressor outlet;

[0015] The B chamber is in communication with the B port and the high-pressure refrigerant inlet;

[0016] The D cavity is communicated with the D port and the low-pressure refrigerant outlet.

[0017] Preferably, two ends of the valve body are respectively connected with a spring cavity end cover and a free cavity end cover.

[0018] Preferably, the compressor outlet cavity is connected to the D cavity through a valve core inner passage and a radial hole.

[0019] Preferably, the D cavity is communicated with the spring cavity through a spring cavity D cavity channel.

[0020] Preferably, the switch valve is communicated with the spring chamber via a switch valve inlet channel;

[0021] The switch valve is connected to the low-pressure refrigerant outlet through a switch valve outlet channel.

[0022] Preferably, a sealing assembly is provided on the outer wall of the valve core, and the sealing assembly comprises an annular groove provided on the outer wall of the valve core, an O-ring and a sealing slip ring are provided in the annular groove, and chamfers are provided on both sides of the outer surface of the sealing slip ring.

[0023] The beneficial effects of the utility model are:

[0024] In the utility model, the switching of the cooling and heating modes is achieved by the momentary operation of the switch valve, so that the cooling mode and the heating mode are concentrated in one valve body; in addition, a plurality of cavities are arranged on the valve core of the utility model, and cooperate with the plurality of liquid inlets and outlets arranged on the valve body to realize multi-channel circulation. Compared with the single-channel circulation in the prior art, the application range of the valve body is increased, and the multi-channel circulation can also increase the overall flow rate of the valve body; finally, the channels in the utility model can be completely sealed without interfering with each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 This is a schematic diagram of a multi-way valve structure for controlling refrigerant pressure and flow provided by an embodiment of the utility model;

[0027] Figure 2 It is a top side view of a multi-way valve for controlling refrigerant pressure and flow provided by an embodiment of the utility model;

[0028] Figure 3 yes Figure 2 Sectional view of AA in the middle;

[0029] Figure 4 This is a state diagram of a valve core moving into a spring cavity in a multi-way valve for controlling refrigerant pressure and flow provided by an embodiment of the utility model;

[0030] Figure 5 This is a state diagram of a valve core moving into a free cavity in a multi-way valve for controlling refrigerant pressure and flow provided by an embodiment of the utility model;

[0031] Figure 6 It is a structural composition diagram of a sealing component in a multi-way valve for controlling refrigerant pressure and flow provided by an embodiment of the utility model.

[0032] In the figure: 1. valve body; 2. switch valve; 3. spring cavity end cover; 4. free cavity end cover; 5. C port; 6. G port; 7. compressor outlet; 8. high-pressure refrigerant inlet; 9. low-pressure refrigerant outlet; 10. free cavity inlet; 11. high-pressure channel; 12. spring cavity inlet; 13. free cavity; 14. C cavity; 15. G cavity; 16. compressor outlet cavity; 17. B cavity; 18. D cavity; 19. spring cavity; 20. sealing assembly; 21. valve core; 22. valve core plug; 23. reset spring; 24. F port; 25. H port; 26. B port; 27. D port; 28. switch valve inlet channel; 29. ​​switch valve outlet channel; 30. spring cavity D cavity channel; 31. valve core inner channel; 32. free end limit boss; 33. spring end limit boss; 34. sealing slip ring; 35. O-ring. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] Example

[0035] A multi-way valve for controlling refrigerant pressure and flow, comprising a valve body 1 arranged in a hollow state, Figure 3-Figure 5The left and right ends of the valve body 1 are through-set, with the left and right ends Figure 4 To ensure the sealing performance, a free cavity end cover 4 is provided at the left end of the valve body 1, and a spring cavity end cover 3 is provided at the right end of the valve body 1, wherein the connection between the end cover and the valve body 1 can be either bolt connection or threaded connection.

[0036] Reference Figure 1 and Figure 2 The valve body 1 is provided with a high-pressure refrigerant inlet 8, a low-pressure refrigerant outlet 9 and a switch valve 2, wherein the high-pressure refrigerant inlet 8 is used for the inlet, and the high-pressure refrigerant inlet 8 is also recorded as port A; and the low-pressure refrigerant outlet 9 is a liquid outlet, and the low-pressure refrigerant outlet 9 is also recorded as port E.

[0037] It should be noted that the switch valve 2 in this embodiment is a solenoid valve, which is a prior art. When powered on, it generates magnetic force, and the opening or closing of the valve is controlled by the magnetic force. The switch valve 2 is connected to the low-pressure refrigerant outlet 9 through the switch valve outlet channel 29, and the liquid flowing out of the switch valve 2 is guided to the low-pressure refrigerant outlet 9 through the switch valve outlet channel 29 to achieve liquid discharge.

[0038] Reference Figure 4 and Figure 5 A movable valve core 21 is arranged in the valve body 1, and a spring chamber 19 is formed between the end of the valve core 21 close to the switch valve 2 and the valve body 1. A return spring 23 is arranged in the spring chamber 19, and the return spring 23 causes the valve core 21 to press against the free chamber end cover 4 in the initial state. Furthermore, in order to prevent the valve core 21 from blocking the switch valve inlet channel 28, the inner wall of the spring chamber end cover 3 is provided with a spring end limit boss 33, which is a convex structure extending outward, and the return spring 23 is sleeved on its outer wall, and the two ends of the return spring 23 are respectively connected to the inner wall of the spring chamber end cover 3 and the outer wall of the valve core 21, wherein the connection method can be one of a tight or fixed method. Preferably, the spring chamber end cover 3 and the free chamber end cover 4 are exactly the same, and are two entities of the same design to reduce the body cost.

[0039] Reference Figure 3 A free cavity 13 is formed between the end of the valve core 21 away from the switch valve 2 and the valve body 1. A free end limiting boss 32 extending outward in a convex shape is provided on the inner wall of the free cavity end cover 4. The arrangement of this structure causes the valve core 21 to abut against the free cavity end cover 4. Due to the arrangement of the free end limiting boss 32, a gap is left between the end of the valve core 21 and the free cavity end cover 4. When the liquid enters the gap, the pressure difference between the two ends of the valve core 21 causes the valve core 21 to move toward the spring cavity end cover 3, and compress the reset spring 23 at the same time.

[0040] In this embodiment, the flow relationship between the high-pressure refrigerant inlet 8, the free cavity 13, the switch valve 2 and the low-pressure refrigerant outlet 9 is as follows:

[0041] 1. The high-pressure refrigerant inlet 8 is connected to the free cavity 13. Furthermore, a high-pressure passage 11 connected to the high-pressure refrigerant inlet 8 is provided in the valve body 1, and the high-pressure passage 11 is connected to the free cavity 13 through the free cavity inlet 10.

[0042] It should be supplemented that: a spring cavity inlet 12 is provided on the high-pressure passage 11 , and the liquid entering from the high-pressure refrigerant inlet 8 will also flow to the spring cavity 19 through the spring cavity inlet 12 .

[0043] 2. The low-pressure refrigerant outlet 9 is connected to the switch valve 2.

[0044] In this embodiment, refer to Figure 3-Figure 4 The valve body 1 is also provided with a plurality of refrigerant inlets and outlets, which are specifically arranged as follows: the valve body 1 is also provided with a compressor outlet 7, a C port 5, a G port 6, an F port 24, an H port 25, a B port 26 and a D port 27. Correspondingly, the outer wall of the valve core 21 is provided with an annular C cavity 14, a G cavity 15, a compressor outlet cavity 16, a B cavity 17 and a D cavity 18.

[0045] It should be noted that: the compressor outlet 7 can be recorded as an ACC port, wherein the outer end of the compressor outlet 7 is connected to the compressor.

[0046] Based on the refrigerant inlet and outlet added on the valve body 1, the flow relationship between each refrigerant inlet and outlet and the cavity provided on the valve core 21 is as follows:

[0047] 1. C cavity 14 is connected with F port 24 and C port 5.

[0048] 2. The G cavity 15 is connected to the H port 25 and the G port 6.

[0049] 3. The compressor outlet cavity 16 is connected to the compressor outlet 7.

[0050] 4. The B chamber 17 is connected to the B port 26 and the high-pressure refrigerant inlet 8.

[0051] 5. The D cavity 18 is connected to the D port 27 and the low-pressure refrigerant outlet 9.

[0052] In addition, in this embodiment, refer to Figure 5 The compressor outlet cavity 16 is connected to the D cavity 18 through the valve core inner passage 31 and the radial hole, so that the compressor outlet cavity 16 is connected to the D cavity 18. It should be noted that in order to ensure the sealing of the end of the valve core 21 close to the return spring 23, the end of the valve core inner passage 31 needs to be sealed, which can be achieved by the valve core plug 22 in the prior art.

[0053] Further, see Figure 5 The D chamber 18 and the spring chamber 19 are connected through the spring chamber D chamber channel 30, so that the D chamber 18 and the spring chamber 19 are connected. Based on the setting of the valve core inner channel 31 and the radial hole, the compressor outlet chamber 16, the D chamber 18 and the spring chamber 19 are connected to each other.

[0054] In addition, it should be noted that the switch valve 2 and the spring chamber 19 are connected through the switch valve inlet channel 28. When the switch valve 2 is opened, the liquid in the spring chamber 19 flows to the switch valve 2 through the switch valve inlet channel 28, and then flows from the switch valve outlet channel 29 to the low-pressure refrigerant outlet 9.

[0055] Finally, it should be noted that: Figure 4 and Figure 6 In order to ensure the sealing performance of the valve core 21 when it moves in the valve body 1, the utility model further discloses a sealing assembly for sealing the valve core 21 when it moves. In some embodiments, the sealing assembly 20 is configured as follows: an annular groove is provided on the outer wall of the valve core 21, wherein an O-ring 35 and a sealing slip ring 34 are provided in the annular groove. The sealing slip ring 34 is made of a low-friction material such as PTFE, and has chamfers or fillets on both sides of the outer surface to reduce the resistance when passing through the hole on the side wall.

[0056] How this one works:

[0057] In the initial state, the default is cooling mode, the free chamber 13 and the spring chamber 19 are both at normal pressure (before startup) or high pressure (when the compressor is running), and the valve core 21 is kept at the free end under the action of the return spring 23. Figure 5 At this time, the three ports A, ACC and D 27 are connected (also connected to the spring chamber 19 through the spring chamber D chamber channel 30), and the G port 6 is connected to the F port 24.

[0058] After the switch valve 2 is powered on, the spring chamber 19 is connected to the E port through the switch valve 2, and the pressure at the right end of the valve core 21 decreases. The valve core 21 moves to the spring end under the action of the high pressure in the free chamber 13. Figure 4 At this time, the connection status of each port is: port A and port B 26, port C 5 and port F 24, port H 25 and port G 6, port D 27 and port E, and port ACC is cut off. Because the spring chamber 19 is also connected to the E port through the spring chamber D chamber channel 30, the valve core 21 will also remain at the spring end after the switch valve 2 is powered off;

[0059] When it is necessary to switch to the cooling mode again, the compressor only needs to be turned off, the switch valve 2 is powered on, the pressure in each chamber of the valve core 21 tends to normal, and the valve core 21 moves to the free end again under the action of the return spring 23, that is, moves to the left end of the valve body 1.

[0060] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A multi-way valve for controlling refrigerant pressure and flow, comprising a hollow valve body (1), characterized in that: The valve body (1) is provided with a high-pressure refrigerant inlet (8), a low-pressure refrigerant outlet (9) and a switch valve (2); A movable valve core (21) is arranged in the valve body (1), and a spring chamber (19) is formed between an end of the valve core (21) close to the switch valve (2) and the valve body (1); and a free chamber (13) is formed between an end of the valve core (21) away from the switch valve (2) and the valve body (1); The high-pressure refrigerant inlet (8) is connected to the free cavity (13); the low-pressure refrigerant outlet (9) is connected to the switch valve (2).

2. A multi-way valve for controlling refrigerant pressure and flow according to claim 1, characterized in that: The valve body (1) is provided with a high-pressure channel (11) connected to the high-pressure refrigerant inlet (8), and the high-pressure channel (11) is connected to the free cavity (13) via the free cavity inlet (10).

3. A multi-way valve for controlling refrigerant pressure and flow according to claim 2, characterized in that: The high-pressure channel (11) is provided with a spring chamber inlet (12).

4. A multi-way valve for controlling refrigerant pressure and flow according to claim 1, characterized in that: The valve body (1) is also provided with a compressor outlet (7), a C port (5), a G port (6), an F port (24), an H port (25), a B port (26) and a D port (27); The outer wall of the valve core (21) is provided with a C chamber (14), a G chamber (15), a compressor outlet chamber (16), a B chamber (17) and a D chamber (18) in an annular arrangement in sequence.

5. A multi-way valve for controlling refrigerant pressure and flow according to claim 4, characterized in that: The C cavity (14) is in communication with the F port (24) and the C port (5); The G cavity (15) is in communication with the H port (25) and the G port (6); The compressor outlet cavity (16) is in communication with the compressor outlet (7); The B chamber (17) is in communication with the B port (26) and the high-pressure refrigerant inlet (8); The D chamber (18) is in communication with the D port (27) and the low-pressure refrigerant outlet (9).

6. A multi-way valve for controlling refrigerant pressure and flow according to claim 1, characterized in that: The two ends of the valve body (1) are respectively connected to a spring cavity end cover (3) and a free cavity end cover (4).

7. A multi-way valve for controlling refrigerant pressure and flow according to claim 5, characterized in that: The compressor outlet cavity (16) is connected to the D cavity (18) through a valve core inner passage (31) and a radial hole.

8. The multi-way valve for controlling refrigerant pressure and flow according to claim 5, characterized in that: The D cavity (18) is communicated with the spring cavity (19) via a spring cavity D cavity channel (30).

9. The multi-way valve for controlling refrigerant pressure and flow according to claim 1, characterized in that: The switch valve (2) is in communication with the spring chamber (19) via a switch valve inlet channel (28); The switch valve (2) is connected to the low-pressure refrigerant outlet (9) via a switch valve outlet channel (29).

10. The multi-way valve for controlling refrigerant pressure and flow according to claim 1, characterized in that: The outer wall of the valve core (21) is provided with a sealing component (20), and the sealing component (20) comprises an annular groove provided on the outer wall of the valve core (21), an O-ring (35) and a sealing slip ring (34) are provided in the annular groove, and chamfers are provided on both sides of the outer surface of the sealing slip ring (34).

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