CN213685381U

CN213685381U - Four-way main valve, four-way reversing valve assembly and air conditioning unit

Info

Publication number: CN213685381U
Application number: CN202021818192.4U
Authority: CN
Inventors: 韩润虎; 金华海
Original assignee: Zhejiang Dunan Artificial Environment Co Ltd
Current assignee: Zhejiang Dunan Artificial Environment Co Ltd
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2021-07-13
Anticipated expiration: 2030-08-26
Also published as: WO2022042101A1

Abstract

The utility model relates to a four-way main valve and four-way reversing valve subassembly, four-way main valve include barrel and switching-over piston. The first air chamber and the second air chamber in the cylinder body are communicated with the air inlet duct through the vent grooves at the same end of the cylinder body. When reversing, the reversing piston needs to be pushed towards the other side. Because the first cavity and the second cavity are communicated with the corresponding air inlet pore passages through the vent grooves on the inner wall of the cylinder body. Therefore, when the reversing operation is executed, high-pressure air in the pilot valve can directly enter the first air chamber or the second air chamber through the corresponding air inlet pore passage and the vent groove, so that the reversing piston is pushed to move. That is, the high-pressure air in the pilot valve does not need to be transferred through a flow passage in the middle of the reversing piston. Therefore, the reversing piston does not need to be additionally provided with a flow passage and a flow passage switching mechanism. Therefore, the structure of the four-way main valve and the four-way reversing valve assembly is simplified and the cost is reduced remarkably. Furthermore, the utility model also provides an air conditioning unit.

Description

Four-way main valve, four-way reversing valve assembly and air conditioning unit

Technical Field

The utility model relates to an air conditioning technology field, in particular to cross main valve, cross reversing valve subassembly and air conditioning unit.

Background

The four-way reversing valve assembly consists of a main valve and a pilot valve for controlling the reversing of the main valve, and the main valve mainly consists of a cylinder and a reversing piston. End covers are sealed at two ends of the cylinder body, and a plurality of main valve ports are arranged on the side wall of the cylinder body. The air inlet and the air outlet of the condenser, the evaporator and the compressor are respectively communicated with different main valve ports. The reversing piston can realize the switching of the communication states of a plurality of different main valve ports by sliding along the cylinder, thereby realizing the change of the flow direction of the refrigerant and realizing the switching of refrigeration and heating.

The reversing piston in the existing four-way main valve slides along the cylinder, and the end face of the reversing piston is often tightly attached to the inner sides of the end covers at the two ends of the cylinder. Therefore, when the main valve needs to switch the communication state of each main valve port, the high-pressure air in the high-pressure air inlet pipe needs to be led into the center of the piston through the flow channel arranged on the piston, and then the high-pressure air flow is led to the corresponding cavity through the flow channel arranged on the center of the piston and the corresponding flow channel switching mechanism, so that the piston can be pushed. Then, after the piston moves through the pore channel connecting the pilot valve and the main valve, high-pressure air can be introduced into the corresponding cavity through the pilot valve, so that the piston is continuously pushed to move until the reversing is realized.

Therefore, in order to realize smooth reversing, more flow passages must be arranged in the reversing piston of the existing four-way main valve, and a corresponding flow passage switching mechanism is arranged. Therefore, the structure of the existing four-way main valve is complex and the cost is high.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a four-way main valve, a four-way reversing valve assembly and an air conditioning unit with simple structure and low cost.

A four-way main valve comprising:

the air inlet duct is arranged on the side wall of each of two ends of the cylinder, the inner walls of the two ends of the cylinder are provided with air grooves, and the air grooves are communicated with the air inlet ducts at the same end of the cylinder and extend along the axial direction of the cylinder; and

the reversing piston is slidably arranged in the cylinder body, and two sides of the reversing piston are matched with the cylinder body to respectively form a first air chamber and a second air chamber;

the first air chamber and the second air chamber are communicated with the air inlet duct through the vent grooves at the same end of the cylinder.

In one embodiment, the vent slot extends to the end of the barrel.

In one embodiment, the four-way main valve further comprises an inner bushing arranged on the inner wall of the cylinder, and an air guide structure is arranged at a position of the inner bushing corresponding to the vent groove.

In one embodiment, the air guide structure is a through slot overlapping the air vent slot.

In one embodiment, the air guide structure is a plurality of through holes, and the through holes are arranged at intervals in the extending direction of the vent groove.

In one embodiment, the cylinder is a hollow cylinder structure with two open ends, and two ends of the cylinder are provided with end covers.

In one embodiment, the surface of the end cover facing the cylinder body is provided with a butting disc, the outer diameter of the butting disc is smaller than the inner diameter of the cylinder body, so that an annular groove is formed by matching the butting disc with the inner wall of the cylinder body, and the vent groove extends into the annular groove.

In one embodiment, the plurality of primary valves are equally spaced around the circumference of the barrel.

A four-way reversing valve assembly comprising a pilot valve and a four-way main valve as described in any of the preferred embodiments above, the pilot valve being for controlling the reversing of the four-way main valve.

When the four-way main valve and the four-way reversing valve component are reversed, the reversing piston needs to be pushed towards the other side. Because the first cavity and the second cavity are communicated with the corresponding air inlet pore passages through the vent grooves on the inner wall of the cylinder body. Therefore, when the reversing operation is executed, high-pressure air in the pilot valve can directly enter the first air chamber or the second air chamber through the corresponding air inlet pore passage and the vent groove, so that the reversing piston is pushed to move. That is, the high-pressure air in the pilot valve does not need to be transferred through a flow passage in the middle of the reversing piston. Therefore, the reversing piston does not need to be additionally provided with a flow passage and a flow passage switching mechanism. Therefore, the structure of the four-way main valve and the four-way reversing valve assembly is simplified and the cost is reduced remarkably.

An air conditioning unit comprises the four-way reversing valve assembly in the preferred embodiment, and a heat exchanger and a compressor are respectively communicated with the corresponding main valve ports.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a four-way reversing valve assembly according to a preferred embodiment of the present invention;

FIG. 2 is a schematic diagram of the construction of the four-way main valve of the four-way reversing valve assembly of FIG. 1;

FIG. 3 is an enlarged schematic view of detail A of the four-way main valve of FIG. 2;

FIG. 4 is a schematic diagram of the cartridge in the four-way main valve of FIG. 2;

FIG. 5 is an enlarged schematic view of detail B of the cartridge shown in FIG. 4;

FIG. 6 is a schematic view of the inner liner of the four-way master valve of FIG. 2;

FIG. 7 is a schematic view of the inner liner in another embodiment.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to FIG. 1, the present invention provides a four-way reversing valve assembly 10 and a four-way main valve 100. The four-way reversing valve assembly 10 includes a pilot valve 200 and a four-way main valve 100, and the pilot valve 200 is used for controlling the four-way main valve 100 to reverse.

The pilot valve 200 is an electromagnetic four-way reversing valve, and generally includes an electromagnetic valve (not shown) and a four-way valve (not shown). By controlling the on/off of the electromagnetic valve, the communication state of each valve port of the pilot valve 200 can be controlled, and the reversing process of the four-way main valve 100 can be further controlled. Specifically, the pilot valve 200 includes a first pilot valve port a, a second pilot valve port b, a third pilot valve port c, and a fourth pilot valve port d. When the electromagnetic valve is in a power-off state, the first guide valve port a is communicated with the fourth guide valve port d, and the second guide valve port b is communicated with the third guide valve port c. When the electromagnetic valve is in a power-on state, the first guide valve port a is communicated with the second guide valve port b, and the third guide valve port c is communicated with the fourth guide valve port d.

It should be noted that in other embodiments, the control process described above may be reversed. That is, in the de-energized state of the solenoid valve, the first pilot valve port a is communicated with the second pilot valve port b, and the third pilot valve port c is communicated with the fourth pilot valve port d. When the electromagnetic valve is in a power-on state, the first guide valve port a is communicated with the fourth guide valve port d, and the second guide valve port b is communicated with the third guide valve port c.

Referring to fig. 2, the four-way main valve 100 of the preferred embodiment of the present invention includes a cylinder 110 and a reversing piston 120.

The barrel 110 is generally a metal tubular structure, having a cylindrical shape. The cylinder 110 is provided with a plurality of main valve ports for communicating with a heat exchanger and a compressor in the air conditioning unit. To facilitate connection with various components of the air conditioning unit, a plurality of main valve ports are arranged at equal intervals around the circumference of the cylinder 110. Specifically, the main valve ports of the cylinder 110 are a first main valve port 101, a second main valve port (not shown), a third main valve port 103, and a fourth main valve port (not shown), and the four main valve ports are disposed on the cylinder 110 in a cross shape. The second main valve port and the fourth main valve port are not shown because they are blocked in the direction perpendicular to the drawing sheet.

Furthermore, the present invention provides an air conditioning unit (not shown) comprising a four-way reversing valve assembly 10, an outdoor unit (not shown), an indoor unit (not shown) and a compressor (not shown). The heat exchanger of the outdoor unit, the heat exchanger of the indoor unit and the compressor are respectively communicated with the corresponding main valve ports.

More specifically, the first main valve port 101 communicates with the gas outlet (high pressure side) of the compressor, and the high-temperature and high-pressure refrigerant gas flows in from the first main valve port 101; the second main valve port is communicated with a heat exchanger of the indoor unit; the third main valve port 103 communicates with the suction port (low-pressure side) of the compressor, and low-temperature and low-pressure refrigerant gas flows in from the third main valve port 103; and the heat exchanger of the outdoor unit of the fourth main valve port is communicated.

It should be noted that in other embodiments, the connection relationship between the plurality of main valves and the compressor and heat exchanger may be interchanged.

The side walls of the two ends of the cylinder 110 are both provided with air inlet channels 111. The air inlet passage 111 penetrates through a sidewall of the cylinder 110 to communicate with the inside of the cylinder 110. The intake passage 111 is used to communicate the cylinder 110 with the valve port of the pilot valve 200. Specifically, the air inlet channel 111 at the left end of the cylinder 110 is connected to the second guide valve port b through the second connection pipe 202, and the air inlet channel 111 at the end of the cylinder 110 is connected to the fourth guide valve port d through the fourth connection pipe 204. Further, the first pilot port a of the pilot valve 200 communicates with the first primary port 101 through the first connection pipe 201; the third pilot port c communicates with the third main valve port 103 via a third connection pipe 203. That is, the first pilot port a is connected to the high pressure side, and the third pilot port c is connected to the low pressure side.

It should be noted that in other embodiments, the connection relationship between each valve port of the pilot valve 200 and the inlet passage 111 and the plurality of main valve ports of the cylinder 110 can be changed.

Further, referring to fig. 4 and 5, the inner walls of the two ends of the cylinder 110 are both provided with vent grooves 112, and the vent grooves 112 are communicated with the air inlet duct 111 at the same end of the cylinder 110 and extend along the axial direction of the cylinder 110. The vent slot 112 may be formed by machining such as drilling and milling.

Specifically, in the present embodiment, the cylinder 110 is a hollow cylindrical structure with two open ends, and two ends of the cylinder 110 are provided with end caps 113. The end cap 113 is typically screwed to the end face of the barrel 110 and sealed thereto by the provision of a sealing gasket. The end caps 113 are detachable from both ends of the cylinder 110, so that the ventilation grooves 112 can be easily formed on the inner walls of both ends of the cylinder 110.

It should be noted that in other embodiments, the cylinder 110 may also be a closed or semi-closed cylindrical structure with two ends not opened or only one end opened.

Referring to fig. 1 and 2 again, the reversing piston 120 is slidably disposed in the cylinder 110, and two sides of the reversing piston 120 cooperate with the cylinder 110 to form the first air chamber 102 and the second air chamber 104, respectively. The first and

second air chambers

102 and 104 are used to distinguish the two air chambers formed in the cylinder 110, and the air chamber on the left side is referred to as the first air chamber 102, and the air chamber on the right side is referred to as the second air chamber 104. When the pressure of the first air chamber 102 is higher than that of the second air chamber 104, the reversing piston 120 is pushed to slide leftwards due to the pressure difference; otherwise, the reversing piston 120 is pushed to slide to the right.

The first and

second air chambers

102 and 104 are connected to the air inlet channel 111 through the air channel 112 at the same end of the cylinder 110. For example, the vent groove 112 at the right side of the cylinder 110 extends into the first air chamber 102 at one end, thereby communicating the first air chamber 102 with the right side air inlet passage 111. Moreover, the vent slot 112 is able to remain in communication with the first air chamber 102 wherever the reversing piston 120 slides. Similarly, the vent slot 112 located on the left side of the barrel 110 can be in communication with the second plenum 104 at all times.

The reversing piston 120 can switch the communication state between the main valve ports by sliding along the cylinder 110, thereby reversing the four-way main valve 100. Specifically, the reversing piston 120 is provided with a first compartment 121 and a second compartment 122 along the axial direction thereof, and the first compartment 121 and the second compartment 122 are both divided into two parts along the radial direction of the reversing piston 120.

When the reversing piston 120 slides to a position where the first compartment 121 opposes each of the main valve ports, the first main valve port 101 communicates with the fourth main valve port through a portion of the first compartment 121, while the second main valve port communicates with the third main valve port 103 through another portion of the first compartment 121; when the reversing piston 120 slides to position the second compartment 122 opposite the respective main valve ports, the first main valve port 101 communicates with the second main valve port through a portion of the second compartment 122, and the fourth main valve port communicates with the third main valve port 103 through another portion of the second compartment 122.

Therefore, by changing the position of the reversing piston 120, the change of the refrigerant flow direction can be realized, so that the air conditioning unit can be switched between the cooling mode and the heating mode.

Specifically, when the first main valve port 101 is communicated with the fourth main valve port, and the second main valve port is communicated with the third main valve port 103, the air conditioning unit is in a cooling mode. At this time, high-temperature and high-pressure refrigerant gas enters a heat exchanger of the outdoor unit through the first main valve port 101 and the fourth main valve port, and after heat release, the refrigerant gas flows through the heat exchanger of the indoor unit to absorb heat, and finally low-temperature and low-pressure gas is formed and returns to the compressor through the second main valve port and the third main valve port 103 to circulate in sequence.

When the first main valve port 101 communicates with the second main valve port and the fourth main valve port communicates with the third main valve port 103, the heating mode is established. At this time, the high-temperature and high-pressure refrigerant gas firstly enters the heat exchanger of the indoor unit through the first main valve port 101 and the second main valve port, and after heat release, the refrigerant gas flows through the heat exchanger of the outdoor unit to absorb heat, and finally low-temperature and low-pressure gas is formed and returns to the compressor through the fourth main valve port and the third main valve port 103 to circulate in sequence.

The overall operation of the four-way reversing valve assembly 10 will now be briefly described with reference to FIG. 1:

when the solenoid valve of the pilot valve 200 is not energized, the first pilot valve port a communicates with the fourth pilot valve port d, and the second pilot valve port b communicates with the third pilot valve port c. The first pilot port a and the first main port 101 are communicated with each other via a first connection pipe 201, and the third pilot port c and the third main port 103 are communicated with each other via a third connection pipe 203. Therefore, the first chamber 102 is connected to the high pressure side through the intake port 111, the fourth guide port d, the first guide port a, and the first main port 101 in this order, and the second chamber 104 is connected to the low pressure side through the intake port 111, the second guide port b, the third guide port c, and the third main port 103 in this order.

At this time, the air pressure in the first air chamber 102 is greater than that in the other air chamber 104, so the reversing piston 120 is driven to move leftward by the pressure difference. After the reversing piston 120 has been shifted to the left, the second compartment 122 will be brought into opposition to each of the main valve ports, so that the first main valve port 101 will communicate with the second main valve port, and the fourth main valve port will communicate with the third main valve port 103. High-temperature and high-pressure refrigerant gas firstly enters a heat exchanger of the indoor unit through the first main valve port 101 and the second main valve port, the refrigerant gas flows through the heat exchanger of the outdoor unit after heat release to absorb heat, low-temperature and low-pressure gas is finally formed and returns to the compressor through the fourth main valve port and the third main valve port 103, and the air conditioning unit is in a heating mode.

When the electromagnetic valve of the pilot valve 200 is electrified, the first pilot valve port a is communicated with the second pilot valve port b, and the fourth pilot valve port d is communicated with the third pilot valve port c; the first pilot port a communicates with the first main port 101 via the first connecting pipe 201, and the third pilot port c communicates with the third main port 103. Therefore, the first chamber 102 is connected to the low pressure side through the intake passage 111, the fourth guide port d, the third guide port c, and the third main port 103 in this order, and the second chamber 104 is connected to the high pressure side through the intake passage 111, the second guide port b, the first guide port a, and the first main port 101 in this order.

At this time, the air pressure of the second air chamber 104 is greater than the air pressure of the first air chamber 102, so the reversing piston 120 is driven to move to the right by the pressure difference. When the reversing piston 120 is moved into position, the first compartment 121 is brought into opposition to each of the main valve ports, so that the first main valve port 101 communicates with the fourth main valve port and the second main valve port communicates with the third main valve port 103. High-temperature and high-pressure refrigerant gas enters a heat exchanger of the outdoor unit from the first main valve port 101 and the fourth main valve port, flows through the heat exchanger of the indoor unit after heat release to absorb heat, and finally forms low-temperature and low-pressure gas which returns to the compressor through the second main valve port and the third main valve port 103. The four-way main valve 100 realizes reversing, and the air conditioning unit is switched to a refrigeration mode.

When the direction is changed, the first chamber 102 and the second chamber 104 are communicated with the corresponding air inlet duct 111 through the vent groove 112 on the inner wall of the cylinder 110. Therefore, when the reversing operation is performed, the high-pressure gas in the pilot valve 200 can directly enter the first gas chamber 102 or the second gas chamber 104 through the corresponding gas inlet duct 111 and the vent groove 112, thereby pushing the reversing piston 120 to move. That is, the high pressure gas in the pilot valve 200 does not need to be transferred through the flow passage in the middle of the switching piston 120. Therefore, the reversing piston 120 does not need to be additionally provided with a flow passage and a flow passage switching mechanism, the machining process of the reversing piston 120 is simpler, the parts are reduced, the structure of the four-way main valve 100 is simplified, and the cost is obviously reduced.

In this embodiment, the vent slot 112 extends to the end of the barrel 110.

Specifically, the vent slot 112 in this embodiment extends to the edge of the opening of the barrel 110. For a barrel 110 that is not open at both ends, the vent channel 112 may extend to the end face of the barrel 110. In this way, the vent groove 112 can always protrude from the surface of the reversing piston 120 without being blocked by the reversing piston 120, and the vent groove 112 can be ensured to be communicated with the corresponding first air chamber 101 and the second air chamber 102.

Referring to fig. 5 again, and referring to fig. 6 and 7, in the present embodiment, the four-way main valve 100 further includes an inner liner 130 disposed on an inner wall of the cylinder 110, and an air guide structure 131 is disposed at a position of the inner liner 130 corresponding to the vent groove 112.

The inner bushing 130 may be formed of ceramic, stainless steel, or the like, and may protect the inner wall of the cylinder 110, and may improve the smoothness of the reversing piston 120 during sliding. And the air guide 131 can prevent the inner liner 130 from covering the air-duct 112 so that the air-duct 112 can be kept in communication with the air chamber.

The air guide 131 may be in various forms as long as it can allow the inner liner 130 not to shield the air-channeled channel 112. Such as: as shown in fig. 6, in the present embodiment, the air guide 131 is a through groove overlapping with the vent groove 112. Similarly, the through groove can be processed and formed in a drilling and milling mode or a cutting mode and the like.

In another embodiment, as shown in fig. 7, the air guide 131 is a plurality of through holes, and the plurality of through holes are spaced apart in the extending direction of the vent groove 112. Similarly, the through hole can be formed by drilling, milling or cutting.

Referring to fig. 3, in the present embodiment, the surface of the end cap 113 facing the cylinder 110 is provided with an abutting disc 1131, the outer diameter of the abutting disc is smaller than the inner diameter of the cylinder 110, so as to form an annular groove 114 in cooperation with the inner wall of the cylinder 110, and the vent groove 112 extends into the annular groove 114.

Specifically, the reversing piston 120 is slidable within the cylinder 110 to engage the abutment disc 1131 on the end cap 113 to effect the reversing. Due to the abutment plate 1131, the reversing piston 120 cannot completely abut against the end surface of the cylinder 110. I.e. the reversing piston 120 cannot reach the area where the annular groove 114 is located. Also, the vent slot 112 extends to an annular slot 114. Therefore, the high pressure gas in the pilot valve 200 can enter the annular groove 114 through the inlet passage 111 and the vent groove 112, and then the reversing piston 120 can be pushed to slide, thereby realizing the reversing.

The four-way main valve 100 and the four-way reversing valve assembly 10 need to push the reversing piston 120 to the other side when reversing. Since the first chamber 102 and the second chamber 104 are communicated with the corresponding air inlet channel 111 through the vent groove 112 on the inner wall of the cylinder 110. Therefore, when the reversing operation is performed, the high-pressure gas in the pilot valve 200 can directly enter the first gas chamber 102 or the second gas chamber 104 through the corresponding gas inlet duct 111 and the vent groove 112, thereby pushing the reversing piston 120 to move. That is, the high pressure gas in the pilot valve 200 does not need to be transferred through the flow passage in the middle of the switching piston 120. Thus, the reversing piston 120 does not need to be provided with an additional flow passage and a flow passage switching mechanism. Therefore, the structure of the four-way main valve 100 and the four-way reversing valve assembly 10 is simplified and the cost is reduced significantly.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A four-way main valve, comprising:

2. The four-way main valve of claim 1, wherein the vent slot extends to a terminal end of the barrel.

3. The four-way main valve according to claim 1, further comprising an inner bushing disposed on an inner wall of the cylinder, wherein an air guide structure is disposed at a position of the inner bushing corresponding to the vent groove.

4. The four-way main valve of claim 3 wherein the air directing structure is a through slot that overlaps the vent slot.

5. The four-way main valve of claim 3, wherein the air directing structure is a plurality of through holes, and the plurality of through holes are spaced apart in the direction of extension of the vent slot.

6. The four-way main valve of claim 1, wherein the cylinder is a hollow cylinder with two open ends, and two ends of the cylinder are provided with end caps.

7. The four-way main valve of claim 6, wherein a surface of the end cap facing a side of the cylinder is provided with a butting disk, an outer diameter of the butting disk is smaller than an inner diameter of the cylinder to form an annular groove in cooperation with an inner wall of the cylinder, and the vent groove extends into the annular groove.

8. The four-way main valve of claim 1, wherein the plurality of main valve ports are equally spaced around a circumference of the barrel.

9. A four-way reversing valve assembly comprising a pilot valve and a four-way main valve as claimed in any one of claims 1 to 8, the pilot valve being adapted to control the reversing of the four-way main valve.

10. An air conditioning assembly, comprising the four-way reversing valve assembly according to claim 9, wherein the heat exchanger and the compressor are respectively communicated with the corresponding main valve ports.