CN114877428A

CN114877428A - Multi-position reversing valve, air conditioning system and air conditioner

Info

Publication number: CN114877428A
Application number: CN202110162986.2A
Authority: CN
Inventors: 汤奇雄; 赵家强; 欧汝浩; 刘和成
Original assignee: Midea Group Co Ltd; Guangdong Midea White Goods Technology Innovation Center Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea White Goods Technology Innovation Center Co Ltd
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2022-08-09
Anticipated expiration: 2041-02-05
Also published as: CN114877428B

Abstract

The application provides a multi-position reversing valve, an air conditioning system and an air conditioner. Wherein, the multi-position reversing valve includes: the main valve body is provided with a plurality of valve ports, and at least part of the valve ports are communicated with each other; the pilot valve is communicated with the main valve body through a connecting pipe and can change the communication state among the multiple valve ports; at least two valve ports are refrigerant inlets and are used for being connected with an exhaust port of the double-exhaust compressor. Among the technical scheme of this application, can be through the connected state that changes the valve port, realize the refrigerant flow direction to air conditioning system, reduced the quantity of the switching-over valve among the air conditioning system, and reduced air conditioning system's the complexity and the control degree of difficulty, be favorable to reduce cost, especially when being applied to the air conditioning system including double air compressor, can realize the indoor set and do not shut down the defrosting, can effectively improve the heating effect among the defrosting process, be favorable to improving user's use and experience.

Description

Multi-position reversing valve, air conditioning system and air conditioner

Technical Field

The application relates to the technical field of air conditioners, in particular to a multi-position reversing valve, an air conditioning system and an air conditioner.

Background

At present, in a traditional heat pump air-conditioning system, the switching of refrigeration and heating is usually realized through a four-way reversing valve, fins of an outdoor heat exchanger are easy to frost when the outdoor temperature is reduced, the heating performance is affected, the traditional air-conditioning system needs to frequently switch a defrosting mode so as to defrost the outdoor heat exchanger by utilizing a high-pressure and high-temperature refrigerant discharged by a compressor, but the refrigerant in the system needs to be frequently reversed in the existing defrosting mode, so that the intermittent cold air blowing in the indoor heat supply process is caused, the heating effect is affected, and the user experience is poor. In order to realize the defrosting of the indoor unit without stopping, a mode of adopting a plurality of valve groups or a plurality of four-way reversing valves exists in the existing scheme, but the air conditioning system is more complex, the control difficulty is higher, and the cost is higher.

Disclosure of Invention

According to an embodiment of the present application, it is intended to at least improve one of technical problems existing in the prior art or the related art.

To this end, it is an object of embodiments according to the present application to provide a multi-position directional valve.

Another object according to an embodiment of the present application is to provide an air conditioning system.

It is a further object of embodiments according to the present application to provide an air conditioner.

To achieve the above object, an embodiment according to a first aspect of the present application provides a multi-position directional control valve for an air conditioning system including a dual-discharge compressor, including: the main valve body is provided with a plurality of valve ports, and at least part of the valve ports are communicated with each other; the pilot valve is communicated with the main valve body through a connecting pipe and can change the communication state among the plurality of valve ports; at least two valve ports are refrigerant inlets and are used for being connected with exhaust ports of the double-exhaust compressor.

According to an embodiment of the first aspect of the present application, a multi-position directional control valve includes a main valve body and a pilot valve. The main valve body is provided with a plurality of valve ports which can be mutually communicated, wherein at least two valve ports are refrigerant inlets so as to utilize the refrigerant inlets to be connected with the exhaust ports of the double-exhaust compressor, and the multi-level reversing valve can be suitable for an air conditioning system comprising the double-exhaust compressor. The pilot valve is communicated with the main valve body through the connecting pipe, so that the communication state between the valve ports of the main valve body is changed through the flow of the refrigerant between the pilot valve and the main valve body, and the flow direction of the refrigerant in the air conditioning system is further changed.

It should be noted that the air conditioning system in the present scheme is not limited to the household air conditioning heat pump system, but is also applicable to the automobile air conditioning heat pump system.

The multi-position reversing valve in the scheme can realize the flow direction of a refrigerant of the air conditioning system through changing the communication state of the valve port, reduces the number of reversing valves in the air conditioning system, reduces the complexity and the control difficulty of the air conditioning system, is favorable for reducing the cost, can realize the defrosting of an indoor unit without stopping when being applied to the air conditioning system comprising double-exhaust compressors, can effectively improve the heating effect in the defrosting process, and is favorable for improving the use experience of users.

In addition, the multi-position reversing valve in the above technical solution provided in the embodiment of the present application may further have the following additional technical features:

in the above technical solution, the main valve body includes: a main valve housing; a main valve block disposed in the main valve housing; the pilot valve can drive the main valve block to move in the main valve shell so as to change the communication state among the valve ports.

In this technical scheme, main valve body includes main valve casing and the main valve piece of locating in the main valve casing. The main valve shell is provided with a plurality of valve ports, the main valve block can move in the main valve shell, and the valve ports are opened or closed through relative movement, so that the communication state among the valve ports is changed, and the flow direction of a refrigerant is changed. The pilot valve can provide power for the main valve block through the flow of a refrigerant between the pilot valve and the main valve body, and the main valve block is driven to move in the main valve shell, so that the control of the main valve body is realized.

In the above technical solution, the main valve block includes: the valve block comprises a valve block body, wherein end plates are respectively arranged at two ends of the valve block body, abut against the inner side wall of the main valve shell and are connected with one opposite end of the main valve shell through a spring; the first sealing structure is arranged between the two end plates and is connected with the valve block body, and the first sealing structure is of a groove-shaped structure and surrounds the side wall of one side of the main valve shell to form a first chamber; the second sealing structure is connected to the position, between the two end plates, on the valve block body, and the second sealing structure and the first sealing structure are arranged at intervals; the two sides of the main valve shell are respectively provided with a valve port, the side walls of the first sealing structure, the second sealing structure, one end plate and the main valve shell surround to form a second cavity, the second sealing structure surrounds the side wall of the other end plate and the main valve shell to form a third cavity, and the second cavity is isolated from the third cavity.

In the technical scheme, the main valve block specifically comprises a valve block body, a first sealing structure and a second sealing structure. The two ends of the valve block body are provided with end plates which are abutted against the inner side wall of the main valve shell so as to form sealing by utilizing the end plates; each end plate is connected to an opposite end of the main valve housing by a spring to enable the valve block body to be reset. The first sealing structure and the second sealing structure are arranged between the two end plates of the valve block body and are both connected with the valve block body so as to move together with the valve block body. The first sealing structure is of a groove-shaped structure, and an opening of the groove-shaped structure faces one side of the main valve shell and surrounds the inner side wall of the main valve shell to form a first cavity; the second sealing structure and the first sealing structure are arranged at intervals, so that the second sealing structure and the side wall of the first sealing structure, one end plate and the main valve shell are encircled to form a second cavity, the second sealing structure and the side wall of the other end plate and the main valve shell are encircled to form a third cavity, the second cavity is positioned on one side, close to the first sealing structure, of the second sealing structure, and the third cavity is positioned on one side, far away from the first sealing structure, of the second sealing structure and is mutually isolated. The side walls of the two sides of the main valve shell are provided with valve ports, and when the main valve block moves to different positions, the first cavity, the second cavity and the third cavity are utilized to enable the different valve ports to be communicated with one another, so that the flow direction of a refrigerant is changed.

In the above technical solution, a plurality of valve ports include: two end valve ports respectively arranged at two ends of the main valve shell; the first valve port, the second valve port, the third valve port and the fourth valve port are arranged on one side of the main valve shell, the fifth valve port and the sixth valve port are refrigerant inlets and are arranged on the other side of the main valve shell, when the main valve block is in an initial position, the first valve port and the sixth valve port are communicated through the second cavity, the second valve port and the third valve port are communicated through the first cavity, and the fourth valve port and the fifth valve port are communicated through the third cavity; the main valve block moves to a first position, the first valve port, the fifth valve port and the sixth valve port are communicated through the second chamber, and the second valve port, the third valve port and the fourth valve port are communicated through the first chamber; when the main valve block moves to a second position, the first valve port is communicated with the second valve port through the first cavity, the third valve port is communicated with the sixth valve port through the second cavity, and the fourth valve port is communicated with the fifth valve port through the third cavity.

In the technical scheme, the plurality of valve ports of the main valve body specifically comprise two end valve ports and six side valve ports. The two end valve ports are respectively arranged at the two ends of the main valve shell; the six side valve ports comprise a first valve port, a second valve port, a third valve port and a fourth valve port which are arranged on one side of the main valve shell, and a fifth valve port and a sixth valve port which are arranged on the other side of the main valve shell, wherein the fifth valve port and the sixth valve port are refrigerant inlets and are used for connecting exhaust ports of the double-exhaust compressor. The main valve block can be switched among an initial position, a first position and a second position, so that when the main valve block is at different positions, the communication states of the valve ports are different, and the flow direction of a refrigerant is changed by switching the position of the main valve block.

In the above technical solution, the pilot valve includes: the two sides of the pilot valve shell are respectively provided with a communicating port; the pilot valve block is arranged in the pilot valve shell, two ends of the pilot valve block are respectively connected with two ends of the pilot valve shell through springs, and the pilot valve block is of a groove-shaped structure and forms a fourth cavity by being surrounded with the side wall of one side of the pilot valve shell; and the electromagnetic controller is used for driving the pilot valve block to move.

In the technical scheme, the pilot valve specifically comprises a pilot valve housing, a pilot valve block and an electromagnetic controller. A pilot valve block is disposed in the pilot valve housing, the pilot valve block being movable relative to the pilot valve housing. The electromagnetic controller is arranged to control the motion of the pilot valve block by utilizing the electromagnetic action; the two ends of the pilot valve block are connected to the pilot valve shell through the springs, so that the pilot valve block is reset under the elastic force action of the springs when the electromagnetic controller is powered off. The pilot valve block is of a groove-shaped structure, a fourth chamber is formed by the pilot valve block and the side wall of one side of the pilot valve shell, so that different communication ports are communicated when the pilot valve block moves to different positions, and the main valve body is controlled.

In the above technical scheme, a first communication port is arranged on one side of the pilot valve housing, which is far away from the fourth chamber, and the first communication port is communicated with the sixth valve port through a connecting pipe; a second communicating port, a third communicating port and a fourth communicating port are arranged on one side, close to the fourth cavity, of the pilot valve shell, the second communicating port and the fourth communicating port are communicated with the two end valve ports of the main valve body through connecting pipes, and the third communicating port is communicated with the second valve port through the connecting pipes; when the pilot valve block is located at the initial position, the second communication port and the fourth communication port are located outside the fourth cavity, and the third communication port is located inside the fourth cavity; the pilot valve block moves to a third position, the first communication port is communicated with the second communication port, the third communication port is communicated with the fourth communication port, and the main valve block is driven to move to the first position; and when the pilot valve block moves to a fourth position, the first communication port is communicated with the fourth communication port, and the second communication port is communicated with the third communication port, so that the main valve block is driven to move to a second position.

In this technical scheme, the pilot valve casing is equipped with first intercommunication mouth in the one side of keeping away from the fourth cavity, and the one side of being close to the fourth cavity is equipped with second intercommunication mouth, third intercommunication mouth and fourth intercommunication mouth. The first communicating port is communicated with the sixth valve port of the main valve body by a connecting pipe so that the refrigerant discharged from the exhaust port of the double-exhaust compressor can flow into the pilot valve; the second communication port and the fourth communication port are respectively connected with two end valve ports of the main valve body through connecting pipes, so that a refrigerant in the pilot valve can flow into any end of the main valve body to drive the main valve block to move; the third communicating port is communicated with the second valve port by a connecting pipe, so that the third communicating port can be communicated with the air return port of the double-exhaust compressor to realize the backflow of the refrigerant. The pilot valve block can be switched among an initial position, a third position and a fourth position, so that the communication state among different communication ports is changed, the movement of the main valve block of the main valve body is controlled, and the flow direction of a refrigerant is controlled.

Embodiments of a second aspect of the present application provide an air conditioning system comprising: a double exhaust compressor; in the multi-position reversing valve according to any one of the embodiments of the first aspect, two refrigerant inlets of the main valve body of the multi-position reversing valve are connected with two exhaust ports of the dual-exhaust compressor through pipelines, and one valve port of the main valve body is connected with a return air port of the dual-exhaust compressor; the outdoor heat exchanger and the indoor heat exchanger assembly are respectively connected with different valve ports on the multi-position reversing valve through pipelines and form a loop; and a throttling part is arranged in a pipeline between the outdoor heat exchanger and the indoor heat exchanger component.

According to an embodiment of the second aspect of the present application, an air conditioning system includes a dual discharge compressor, a multi-position reversing valve, an outdoor heat exchanger, and an indoor heat exchanger assembly. Two valve ports serving as refrigerant inlets in the multi-position directional control valve are connected with two exhaust ports of the double-exhaust compressor through pipelines, and the other valve port of the multi-position directional control valve is connected with a return air port of the double-exhaust compressor through a pipeline; the outdoor heat exchanger and the indoor heat exchanger assembly are connected with the multi-position reversing valve through pipelines to form a loop, and the multi-position reversing valve is used for controlling the communication state between the exhaust port and the return port of the double-exhaust compressor and the outdoor heat exchanger and the indoor heat exchanger assembly, so that the flow direction of a refrigerant in the air conditioning system is changed, and different working modes of the air conditioning system, such as a refrigeration mode, a heating mode, a defrosting mode and the like, are realized. And a throttling component is arranged between the outdoor heat exchanger and the indoor heat exchanger assembly and is used for throttling the refrigerant.

The air conditioning system in the scheme can realize a plurality of working modes of the whole air conditioning system only by one multi-position reversing valve, reduces the complexity and the control difficulty of the air conditioning system and is favorable for reducing the cost. Wherein, air conditioning system in this scheme is not limited to domestic air conditioner heat pump system, also is applicable to vehicle air conditioner heat pump system.

In addition, the air conditioning system in this scheme also has all the beneficial effects of any one of the multi-position reversing valves in the embodiments of the first aspect, which are not described herein again.

In addition, the multi-position reversing valve in the above technical solution provided according to the embodiment of the present application may further have the following additional technical features:

in the above technical solution, the indoor heat exchanger assembly includes: a ventilation cavity; the first indoor heat exchanger and the second indoor heat exchanger are arranged in the air passing cavity and are arranged at intervals along the extending direction of the air passing cavity; the wind shielding structure is movably arranged between the first indoor heat exchanger and the second indoor heat exchanger and can shield airflow flowing to the second indoor heat exchanger.

In this technical scheme, indoor heat exchanger subassembly specifically includes air passing cavity, first indoor heat exchanger, second indoor heat exchanger and structure of keeping out the wind. The first indoor heat exchanger and the second indoor heat exchanger are arranged in the air passing cavity; the air flow cavity can guide air flow to pass through so as to promote the heat exchange between the first indoor heat exchanger and the second indoor heat exchanger and the outside. The wind shielding structure is arranged between the first indoor heat exchanger and the second indoor heat exchanger and can move so as to shield airflow flowing to the second indoor heat exchanger according to use requirements. Particularly, under the defrosting mode, first indoor heat exchanger releases the heat as the condenser, and the second indoor heat exchanger absorbs the heat as the evaporimeter, can realize not shutting down the defrosting, and at this moment, shelters from the second indoor heat exchanger through the structure of keeping out the wind, can reduce the cold wind air current that indoor heat exchanger subassembly produced, increases hot-blast air current, realizes the segmentation heating to improve the heating effect under the defrosting mode.

In the above technical scheme, the second indoor heat exchanger is arranged on the leeward side of the first indoor heat exchanger, and the cross-sectional area of the second indoor heat exchanger is smaller than that of the first indoor heat exchanger.

In this technical scheme, because according to the use needs, need shelter from the second heat exchanger sometimes, be located the leeward side of first indoor heat exchanger through setting up the second indoor heat exchanger, reducible influence to the air current that flows into first indoor heat exchanger. The cross-sectional area of the second indoor heat exchanger is smaller than that of the first indoor heat exchanger, so that a space is reserved for the wind shielding structure, when the wind shielding structure is in an open state (namely, the state that the second indoor heat exchanger is not shielded), the wind shielding structure cannot interfere with the air passing cavity, the setting mode is relatively simple, the size of the air passing cavity does not need to be enlarged, and the space utilization rate is favorably improved. Of course, the shape of the air passing cavity may also be changed, for example, the air passing cavity is set to be a Y-shaped structure, and in this case, the first indoor heat exchanger and the second indoor heat exchanger having the same cross-sectional area may be used, and the respective functions may also be realized.

In an embodiment according to a third aspect of the present application, there is provided an air conditioner including: the air conditioning system of any of the embodiments of the second aspect described above; the outdoor unit shell, the double-exhaust compressor, the multi-position reversing valve and the outdoor heat exchanger of the air conditioning system are arranged in the outdoor unit shell; the outdoor fan is arranged in the outdoor unit shell and corresponds to the outdoor heat exchanger; the indoor heat exchanger assembly of the air conditioning system is arranged in the indoor unit shell; and the indoor fan is arranged in the indoor unit shell and corresponds to the air passing cavity of the indoor heat exchanger assembly.

In this aspect, the air conditioner includes the air conditioning system, the outdoor unit casing, the indoor unit casing, the outdoor fan, and the indoor fan of any one of the embodiments of the second aspect described above. The double-exhaust compressor, the multi-position reversing valve, the outdoor heat exchanger and the outdoor fan in the air conditioning system are arranged in an outdoor unit shell, so that an outdoor unit of the air conditioner is formed; an indoor heat exchanger assembly and an indoor fan in an air conditioning system are disposed in an indoor unit casing to form an indoor unit of an air conditioner. The indoor unit and the outdoor unit are integrally formed, so that the indoor unit and the outdoor unit are convenient to transport and install.

In addition, the air conditioner in the present scheme further has all the beneficial effects of the air conditioning system in any one of the embodiments of the second aspect, which are not described herein again.

Additional aspects and advantages of the embodiments of the application will be set forth in part in the description which follows or may be learned by practice of the application.

Drawings

The above and/or additional aspects and advantages of embodiments of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 illustrates a schematic view of a multi-position reversing valve according to one embodiment of the present application;

FIG. 2 illustrates a schematic view of a main valve body according to an embodiment of the present application;

FIG. 3 shows a schematic diagram of a pilot valve according to an embodiment of the present application;

FIG. 4 illustrates a schematic view of a multi-position reversing valve according to an embodiment of the present application;

FIG. 5 shows a schematic diagram of a four-way valve assembly;

FIG. 6 illustrates a schematic view of a multi-position reversing valve according to an embodiment of the present application;

FIG. 7 shows a schematic diagram of a four-way valve assembly;

FIG. 8 shows a schematic view of a multi-position reversing valve according to an embodiment of the present application;

FIG. 9 shows a schematic view of a multi-position reversing valve according to an embodiment of the present application;

FIG. 10 shows a schematic diagram of an air conditioning system according to an embodiment of the present application;

FIG. 11 illustrates a schematic view of a multi-position reversing valve according to an embodiment of the present application;

FIG. 12 shows a schematic diagram of a four-way valve assembly.

Wherein, the correspondence between the reference numbers and the names of the components in fig. 1 to 12 is as follows:

101 four-way valve, 102 control valve;

1 multi-position reversing valve, 11 main valve body, 111 main valve housing, 1111 first valve port, 1112 second valve port, 1113 third valve port, 1114 fourth valve port, 1115 fifth valve port, 1116 sixth valve port, 1117 end valve port, 1118 refrigerant inlet, 112 main valve block, 1121 valve block body, 1122 end plate, 1123 first sealing structure, 1124 second sealing structure, 113 first chamber, 114 second chamber, 115 third chamber, 12 pilot valve, 121 pilot valve housing, 1211 first communication port, 1212 second communication port, 1213 third communication port, 1214 fourth communication port, 122 pilot valve block, 1221 fourth chamber, 123 electromagnetic controller, 2 air conditioning system, 21 double exhaust compressor, 211 first exhaust port, 212 second exhaust port, 213 return port, 22 outdoor heat exchanger, 23 indoor heat exchanger assembly, 231 air passing cavity, 232 first indoor heat exchanger, 233 second indoor heat exchanger, 234 wind shielding structure, 241 first exhaust port, 242 second throttling element, 243 third throttling element, 3 air conditioner, 31 outdoor machine shell, 32 outdoor fan, 33 indoor machine shell, 34 indoor fan.

Detailed Description

In order that the above objects, features and advantages of the embodiments according to the present application may be more clearly understood, embodiments according to the present application will be described in further detail below with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth to provide a thorough understanding of embodiments according to the present application, however, embodiments according to the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.

A multi-position directional control valve, an air conditioning system, and an air conditioner according to some embodiments of the present application are described below with reference to fig. 1 to 12.

Example one

The embodiment provides a multi-position reversing valve 1 which can be used for an air conditioning system comprising double-exhaust compressors.

As shown in fig. 1, the multi-position directional control valve 1 includes a main valve body 11 and a pilot valve 12. The main valve body 11 is used for communicating with a double exhaust compressor and other devices in an air conditioning system, and the pilot valve 12 is used for controlling the main valve body 11.

The main valve body 11 is provided with a plurality of valve ports, and the valve ports can be communicated with each other. At least two of the ports are refrigerant inlets 1118 for connecting to the exhaust ports of the dual exhaust compressor, for example, the two ports located at the top in fig. 1, so that the multi-position directional control valve 1 can be applied to an air conditioning system including the dual exhaust compressor. The pilot valve 12 is communicated with the main valve body 11 through a connecting pipe, so that a refrigerant between the pilot valve 12 and the main valve body 11 can flow, the communication state between a plurality of valve ports of the main valve body 11 is changed, and the flow direction of the refrigerant in the air conditioning system is further changed.

The multi-position reversing valve 1 in the embodiment can realize the refrigerant flow direction of the air-conditioning system by changing the communication state of the valve port, reduce the number of reversing valves in the air-conditioning system, reduce the complexity and the control difficulty of the air-conditioning system, and is favorable for reducing the cost.

It should be noted that the air conditioning system in this embodiment is not limited to the household air conditioning heat pump system, but is also applicable to the automobile air conditioning heat pump system.

Example two

The embodiment provides a multi-position reversing valve 1, and is further improved on the basis of the first embodiment.

As shown in fig. 1 and 2, the main valve body 11 includes a main valve housing 111 and a main valve block 112 provided in the main valve housing 111. The main valve housing 111 is provided with a plurality of ports, and the main valve block 112 can move in the main valve housing 111 and open or close the ports through relative movement, thereby changing the communication state among the ports and further changing the flow direction of the refrigerant. The pilot valve 12 can provide power for the main valve block 112 through the flow of the refrigerant between the main valve body 11, and drive the main valve block 112 to move in the main valve housing 111, thereby controlling the main valve body 11.

Specifically, the main valve block 112 specifically includes a valve block body 1121, a first seal structure 1123, and a second seal structure 1124. Two ends of the valve block body 1121 are provided with end plates 1122, and each end plate 1122 is connected with one end of the main valve housing 111 opposite to the other end through a spring, so that the valve block body 1121 can be reset; each end plate 1122 abuts the inner side wall of the main valve housing 111 to provide a seal. The first and

second sealing structures

1123 and 1124 are disposed between the two end plates 1122 of the valve block body 1121, and are both connected to the valve block body 1121 to move together with the valve block body 1121.

The first sealing structure 1123 is a groove-shaped structure, an opening of the groove-shaped structure faces one side of the main valve housing 111, and the first sealing structure 1123 abuts against an inner side wall of the main valve housing 111 side and encloses to form the first chamber 113. In the moving direction of the valve block body 1121, the second sealing structure 1124 is spaced from the first sealing structure 1123, that is, the second sealing structure 1124 is located between the first sealing structure 1123 and one of the end plates 1122 of the valve block body 1121, and the second sealing structure 1124 abuts against the inner side wall of the main valve housing 111. The space is divided into two mutually isolated spaces by the first sealing structure 1123, the second sealing structure 1124, the two end plates 1122 and the side wall of the main valve housing 111, specifically, the first sealing structure 1123, the second sealing structure 1124, the side wall of one end plate 1122 and the side wall of the main valve housing 111 surround to form the second chamber 114, the second sealing structure 1124 surrounds the other end plate 1122 and the side wall of the main valve housing 11 to form the third chamber 115, namely, the space between the second sealing structure 1124 and the first sealing structure 1123 forms the second chamber 114, the second chamber 114 is positioned at the side of the second sealing structure 1124 close to the first sealing structure 1123, the second sealing structure 1124 and the corresponding end plate 1122 form the third chamber 115, and the third chamber 115 is positioned at the side of the second sealing structure 1124 far from the first sealing structure 1123.

The side walls of the main valve housing 111 on both sides are provided with ports, and the first chamber 113, the second chamber 114, and the third chamber 115 are respectively provided therein with the refrigerant flowing therein, and are capable of communicating different ports. With the movement of the main valve block 112, the positions of the first chamber 113, the second chamber 114 and the third chamber 115 are changed, so that the first chamber 113, the second chamber 114 and the third chamber 115 are utilized to communicate different valve ports, and the flow direction of the refrigerant is changed.

EXAMPLE III

The embodiment provides a multi-position reversing valve 1, and is further improved on the basis of the second embodiment.

As shown in fig. 1 to 2, the plurality of ports of the main valve body 11 specifically include two end ports 1117 and six side ports. The two end valve ports 1117 are respectively arranged at two ends of the main valve shell 111; the six side ports include a first port 1111, a second port 1112, a third port 1113, and a fourth port 1114 disposed on one side of the main valve housing 111, and a fifth port 1115 and a sixth port 1116 disposed on the other side of the main valve housing 111, and the ports on the same side are sequentially disposed at intervals. The fifth valve port 1115 and the sixth valve port 1116 are refrigerant inlets 1118, and are used for connecting exhaust ports of the dual-exhaust compressor, and the second valve port 1112 is used for connecting return ports of the dual-exhaust compressor.

The main valve block 112 can be switched among an initial position, a first position and a second position, so that when the main valve block 112 is at different positions, the communication states of the ports are different, and the flow direction of the refrigerant is changed by switching the position of the main valve block 112. When the main valve block 112 is in the initial position (as shown in fig. 1 and 2), the first valve port 1111 and the sixth valve port 1116 are both in communication with the second chamber 114, such that the first valve port 1111 and the sixth valve port 1116 form communication therebetween; both the second port 1112 and the third port 1113 are in communication with the first chamber 113 such that communication is established between the second port 1112 and the third port 1113; fourth port 1114 and fifth port 1115 both communicate with third chamber 115 such that communication is established between fourth port 1114 and fifth port 1115. When the master poppet 112 moves to the first position (i.e., the master poppet 112 moves to the right in FIG. 2), the first port 1111, the fifth port 1115 and the sixth port 1116 communicate through the second chamber 114, and the second port 1112, the third port 1113 and the fourth port 1114 communicate through the first chamber 113; when the master poppet 112 moves to the second position (i.e., the master poppet 112 moves to the left in FIG. 2), the first port 1111 and the second port 1112 are in communication via the first chamber 113, the third port 1113 and the sixth port 1116 are in communication via the second chamber 114, and the fourth port 1114 and the fifth port 1115 are in communication via the third chamber 115.

Example four

The embodiment provides a multi-position reversing valve 1, and further improvement is made on the basis of the third embodiment.

As shown in fig. 1 to 3, the pilot valve 12 specifically includes a pilot valve housing 121, a pilot valve block 122, and an electromagnetic controller 123. Two sides of the pilot valve housing 121 are provided with communication ports, which are connected to the valve port of the main valve body 11 through connection pipes, respectively. The pilot valve block 122 is provided in the pilot valve housing 121 and is movable relative to the pilot valve housing 121, and when the pilot valve block 122 is moved to a different position, different communication ports are communicated with each other, and the main valve body 11 is controlled. The pilot valve block 122 is of a groove-shaped structure, an opening of the groove-shaped structure faces one side of the pilot valve housing 121 and surrounds a side wall of the pilot valve housing 121 to form a fourth chamber 1221, and the position of the fourth chamber 1221 changes along with the movement of the pilot valve block 122. The solenoid controller 123 may control the movement of the pilot valve block 122 using electromagnetic action. Specifically, the two ends of the pilot valve housing 121 may be respectively provided with an electromagnetic controller 123, wherein the two ends of the pilot valve block 122 are respectively connected with the pilot valve housing 121 through springs, so that when the electromagnetic controller 123 is powered off, the pilot valve block 122 can be reset by using the elastic force of the springs.

Further, the number of the communication ports is four, and the communication ports include a first communication port 1211, a second communication port 1212, a third communication port 1213, and a fourth communication port 1214, which are provided on both sides of the pilot valve housing 121. Specifically, the first communication port 1211 is provided on a side of the pilot valve housing 121 remote from the fourth chamber 1221, and the second communication port 1212, the third communication port 1213, and the fourth communication port 1214 are provided at intervals in this order on a side of the fourth chamber 1221. The first connection port 1211 is connected to the sixth port 1116 of the main valve body 11 through a connection pipe, so that the refrigerant discharged from the exhaust port of the dual exhaust compressor can flow into the pilot valve 12; the second communication port 1212 and the fourth communication port 1214 are respectively connected with the two end valve ports 1117 of the main valve body 11 through connecting pipes, that is, the second communication port 1212 is connected with the end valve port 1117 at the left end of the main valve housing 111, and the fourth communication port 1214 is connected with the end valve port 1117 at the end of the main valve housing 111, so that the refrigerant in the pilot valve 12 can flow into any end of the main valve body 11 to drive the main valve block 112 to move; the third communication port 1213 communicates with the second valve port 1112 of the main valve body 11 through a connection pipe, so that the third communication port 1213 can communicate with a return port of the dual exhaust compressor to achieve the return of the refrigerant.

The pilot valve block 122 is switchable between an initial position, a third position, and a fourth position to change the communication state between different communication ports, thereby controlling the movement of the main valve block 112 of the main valve body 11 and controlling the flow direction of the refrigerant. When the pilot valve block 122 is located at the initial position (in the state shown in fig. 1 and 3), the second communication port 1212 and the fourth communication port 1214 are located outside the fourth chamber 1221, and the third communication port 1213 is located inside the fourth chamber 1221, the first communication port 1211 communicates with the second communication port 1212 and the fourth communication port 1214, and pressure is generated at both ends of the main valve body 11, so that the main valve block 112 of the main valve body 11 is also located at the initial position.

When the pilot valve block 122 moves to the third position (as shown in fig. 4), that is, the pilot valve block 122 moves to the right position, so that the first communication port 1211 and the second communication port 1212 are communicated with each other, and the third communication port and the fourth communication port 1214 are communicated with each other, at this time, the pressure at the left end of the main valve body 11 increases, and the main valve block 112 is driven to move to the first position, that is, the main valve block 112 moves to the right position, and the original refrigerant at the right end of the main valve body 11 can flow to the second valve port 1112 through the fourth chamber 1221 and return to the return port of the dual exhaust compressor. At this time, the first port 1111 of the main valve body 11 communicates with the fifth port 1115 and the sixth port 1116, and the second port 1112 communicates with the third port 1113 and the fourth port 1114, and if such a communication state is realized by using a conventional four-way valve, a combination of two four-way valves as shown in fig. 5 is required, which increases the difficulty of connection and the complexity of the air conditioning system, and is inconvenient to control.

When the pilot valve block 122 moves to the fourth position (as shown in fig. 6), that is, the pilot valve block 122 moves to the left position, so that the first communication port 1211 and the fourth communication port 1214 are communicated, and the second communication port 1212 and the third communication port 1213 are communicated, at this time, the head pressure of the main valve body 11 increases, and drives the main valve block 112 to move to the second position, that is, the main valve block 112 moves to the left position, and the original refrigerant at the left end of the main valve body 11 can flow to the second port 1112 through the fourth chamber 1221 and return to the return port of the dual exhaust compressor. At this time, the first port 1111 of the main valve body 11 communicates with the second port 1112, the third port 1113 communicates with the sixth port 1116, and the fourth port 1114 communicates with the fifth port 1115, and if the conventional four-way valve is used to realize such a communication state, a combination of two four-way valves as shown in fig. 7 is required, which increases the difficulty of connection and the complexity of the air conditioning system, and is inconvenient to control.

The following provides a specific embodiment of the above-described multi-position directional control valve 1:

as shown in fig. 1 to 3, the multi-position directional control valve 1 includes a main valve body 11 and a pilot valve 12. The main valve body 11 is used for communicating with a double exhaust compressor and other devices in an air conditioning system, and the pilot valve 12 is used for controlling the main valve body 11.

The main valve body 11 includes a main valve housing 111 and a main valve block 112 provided in the main valve housing 111, the main valve block 112 being movable in the main valve housing 111. The main valve block 112 specifically includes a valve block body 1121, a first seal structure 1123, and a second seal structure 1124. Two ends of the valve block body 1121 are provided with end plates 1122, and each end plate 1122 is connected with one end of the main valve housing 111 opposite to the other end through a spring, so that the valve block body 1121 can be reset; each end plate 1122 abuts the inner side wall of the main valve housing 111 to provide a seal. The first and

second sealing structures

The first sealing structure 1123 is a groove-shaped structure, an opening of the groove-shaped structure faces one side of the main valve housing 111, and the first sealing structure 1123 abuts against an inner side wall of the main valve housing 111 side and encloses to form the first chamber 113. In the moving direction of the valve block body 1121, the second sealing structure 1124 is spaced from the first sealing structure 1123, that is, the second sealing structure 1124 is located between the first sealing structure 1123 and one of the end plates 1122 of the valve block body 1121, and the second sealing structure 1124 abuts against the inner side wall of the main valve housing 111. The space is divided into two mutually isolated spaces by the first sealing structure 1123, the second sealing structure 1124, the two end plates 1122 and the side wall of the main valve housing 111, specifically, the first sealing structure 1123, the second sealing structure 1124, the side wall of one end plate 1122 and the side wall of the main valve housing 111 surround to form the second chamber 114, the second sealing structure 1124 surrounds the other end plate 1122 and the side wall of the main valve housing 11 to form the third chamber 115, namely, the space between the second sealing structure 1124 and the first sealing structure 1123 forms the second chamber 114, the second chamber 114 is positioned at the side of the second sealing structure 1124 close to the first sealing structure 1123, and the second sealing structure 1124 and the corresponding end plate 1122 form the third chamber 115, namely, the third chamber 115 is positioned at the side of the second sealing structure 1124 far from the first sealing structure 1123.

The main valve housing 111 is provided with a plurality of valve ports, specifically including two end valve ports 1117 and six side valve ports. The two end valve ports 1117 are respectively arranged at two ends of the main valve shell 111; the six side ports include a first port 1111, a second port 1112, a third port 1113, and a fourth port 1114 disposed on one side of the main valve housing 111, and a fifth port 1115 and a sixth port 1116 disposed on the other side of the main valve housing 111, and the ports on the same side are sequentially disposed at intervals. The fifth valve port 1115 and the sixth valve port 1116 are refrigerant inlets 1118, and are used for connecting exhaust ports of the dual-exhaust compressor, and the second valve port 1112 is used for connecting return ports of the dual-exhaust compressor.

The main valve block 112 can be switched among an initial position, a first position and a second position, so that when the main valve block 112 is at different positions, the communication states of the ports are different, and the flow direction of the refrigerant is changed by switching the position of the main valve block 112. When the main valve block 112 is in the initial position (as shown in fig. 1 and 2), the first valve port 1111 and the sixth valve port 1116 are both in communication with the second chamber 114, such that the first valve port 1111 and the sixth valve port 1116 form communication therebetween; both the second port 1112 and the third port 1113 are in communication with the first chamber 113 such that communication is established between the second port 1112 and the third port 1113; fourth port 1114 and fifth port 1115 both communicate with third chamber 115 such that communication is established between fourth port 1114 and fifth port 1115.

The pilot valve 12 specifically includes a pilot valve housing 121, a pilot valve block 122, and an electromagnetic controller 123. The pilot valve block 122 is provided in the pilot valve housing 121, and is movable relative to the pilot valve housing 121. The pilot valve block 122 is of a groove-shaped structure, an opening of the groove-shaped structure faces one side of the pilot valve housing 121 and surrounds a side wall of the pilot valve housing 121 to form a fourth chamber 1221, and the position of the fourth chamber 1221 changes along with the movement of the pilot valve block 122. Both ends of the pilot valve housing 121 are respectively provided with electromagnetic controllers 123 to control the movement of the pilot valve block 122 by electromagnetic action. Both ends of the pilot valve block 122 are respectively connected to the pilot valve housing 121 through springs, so that when the electromagnetic controller 123 is powered off, the pilot valve block 122 can be reset by the elastic force of the springs.

The pilot valve housing 121 is provided with four communication ports, including a first communication port 1211, a second communication port 1212, a third communication port 1213, and a fourth communication port 1214, which are provided on both sides of the pilot valve housing 121. Specifically, the first communication port 1211 is provided on a side of the pilot valve housing 121 remote from the fourth chamber 1221, and the second communication port 1212, the third communication port 1213, and the fourth communication port 1214 are provided at intervals in this order on a side of the fourth chamber 1221. The first communication port 1211 is communicated with the sixth port 1116 of the main valve body 11 through a connection pipe; the second communication port 1212 and the fourth communication port 1214 are respectively connected with the two end valve ports 1117 of the main valve body 11 through connecting pipes, that is, the second communication port 1212 is connected with the end valve port 1117 at the left end of the main valve housing 111, and the fourth communication port 1214 is connected with the end valve port 1117 at the end of the main valve housing 111; the third communication port 1213 communicates with the second port 1112 of the main valve body 11 via a connection pipe.

When the pilot valve block 122 moves to the third position (as shown in fig. 4), that is, the pilot valve block 122 moves to the right position, so that the first communication port 1211 and the second communication port 1212 are communicated with each other, and the third communication port 1213 and the fourth communication port 1214 are communicated with each other, at this time, the pressure at the left end of the main valve body 11 increases, and drives the main valve block 112 to move to the first position, that is, the main valve block 112 moves to the right position, and the original refrigerant at the right end of the main valve body 11 can flow to the second valve port 1112 through the fourth chamber 1221 and return to the return port of the dual exhaust compressor. At this time, the first port 1111 of the main valve body 11 communicates with the fifth port 1115 and the sixth port 1116, and the second port 1112 communicates with the third port 1113 and the fourth port 1114.

When the pilot valve block 122 moves to the fourth position (as shown in fig. 6), that is, the pilot valve block 122 moves to the left position, so that the first communication port 1211 and the fourth communication port 1214 are communicated, and the second communication port 1212 and the third communication port 1213 are communicated, at this time, the head pressure of the main valve body 11 increases, and drives the main valve block 112 to move to the second position, that is, the main valve block 112 moves to the left position, and the original refrigerant at the left end of the main valve body 11 can flow to the second port 1112 through the fourth chamber 1221 and return to the return port of the dual exhaust compressor. At this time, the first port 1111 and the second port 1112 of the main valve body 11 communicate with each other, the third port 1113 and the sixth port 1116 communicate with each other, and the fourth port 1114 and the fifth port 1115 communicate with each other.

The multi-position directional control valve 1 in this embodiment can change the communication state of the valve port of the main valve body 11 by using the refrigerant flow between the pilot valve 12 and the main valve body 11, thereby realizing the refrigerant flow direction of the air conditioning system, reducing the number of directional control valves in the air conditioning system, reducing the complexity and control difficulty of the air conditioning system, being beneficial to reducing the cost, particularly being applied to the air conditioning system comprising the double-exhaust compressor, realizing the defrosting of the indoor unit without stopping the machine, effectively improving the heating effect in the defrosting process, and being beneficial to improving the use experience of users.

EXAMPLE five

In the present embodiment, an air conditioning system 2 is provided, and as shown in fig. 1 and 8, the air conditioning system 2 includes a dual-exhaust compressor 21, a multi-position directional control valve 1 in any of the above embodiments, an outdoor heat exchanger 22, and an indoor heat exchanger assembly 23.

Two ports of the multi-position directional control valve 1 as the refrigerant inlet 1118 are connected to two exhaust ports of the twin exhaust compressor 21 through pipes, and the other port of the multi-position directional control valve 1 is connected to the return port 213 of the twin exhaust compressor 21 through a pipe. The outdoor heat exchanger 22 and the indoor heat exchanger assembly 23 are respectively connected to the multi-position reversing valve 1 through pipelines and form a refrigerant loop, so that the multi-position reversing valve 1 controls the communication state between the exhaust port and the return port 213 of the dual-exhaust compressor 21 and the outdoor heat exchanger 22 and the indoor heat exchanger assembly 23, thereby changing the refrigerant flow direction in the air conditioning system 2, and enabling the air conditioning system 2 to realize different working modes, such as a cooling mode, a heating mode, a defrosting mode, and the like. A throttling component is arranged between the outdoor heat exchanger 22 and the indoor heat exchanger assembly 23 and is used for throttling the refrigerant.

In the air conditioning system 2 in this embodiment, only one multi-position directional control valve 1 is needed to realize a plurality of working modes of the whole air conditioning system 2, so that the complexity and the control difficulty of the air conditioning system 2 are reduced, and the cost is reduced.

In addition, the air conditioning system 2 in this embodiment has all the advantages of the multi-position reversing valve 1 in any of the above embodiments, and details are not repeated herein.

EXAMPLE six

The present embodiment provides an air conditioning system 2, which is further improved on the basis of the fifth embodiment.

As shown in fig. 1, 2 and 8, the indoor heat exchanger assembly 23 specifically includes an air passing cavity 231, a first indoor heat exchanger 232, a second indoor heat exchanger 233 and a wind shielding structure 234. The first indoor heat exchanger 232 and the second indoor heat exchanger 233 are both arranged in the air passing cavity 231; the air passing cavity 231 can guide an air flow therethrough to facilitate the heat exchange of the first and second

indoor heat exchangers

232 and 233 with the outside. The wind shielding structure 234 is disposed between the first indoor heat exchanger 232 and the second indoor heat exchanger 233 and can perform a turning motion, and the wind shielding structure 234 can open or shield the second indoor heat exchanger 233 according to a use requirement, so as to control an air flow flowing to the second indoor heat exchanger 233.

Further, fig. 8 shows an arrangement of the first indoor heat exchanger 232 and the second indoor heat exchanger 233. The second indoor heat exchanger 233 is located on the leeward side of the first indoor heat exchanger 232, and can reduce the influence on the airflow flowing into the first indoor heat exchanger 232. The cross-sectional area of the second indoor heat exchanger 233 is smaller than that of the first indoor heat exchanger 232, so as to reserve a space for the wind shielding structure 234, and when the wind shielding structure 234 is in an open state (i.e., a state where the second indoor heat exchanger 233 is not shielded), the wind shielding structure 234 does not interfere with the wind passing cavity 231. This kind of arrangement is comparatively simple, need not to enlarge the volume of overfire air cavity 231, is favorable to improving space utilization. Of course, the first indoor heat exchanger 232 and the second indoor heat exchanger 233 are not limited to the arrangement shown in fig. 8, and the shape of the air passing cavity 231 may be changed, for example, the air passing cavity 231 is arranged in a Y-shaped structure, in this case, the first indoor heat exchanger 232 and the second indoor heat exchanger 233 having the same cross-sectional area may be adopted, and the respective functions may also be realized.

Furthermore, six ports are arranged on two sides of the main valve body 11 of the multi-position reversing valve 1, namely a first port 1111, a second port 1112, a third port 1113, a fourth port 1114, a fifth port 1115 and a sixth port 1116, the fifth port 1115 and the sixth port 1116 are located on one side of the main valve body 11, and the first port 1111, the second port 1112, the third port 1113 and the fourth port 1114 are located on the other side of the main valve body 11; the main valve body 11 is provided with a main valve block 112, and the communication state between the valve ports can be changed by the movement of the main valve block 112. The fifth valve port 1115 and the sixth valve port 1116 are connected to the left refrigerant inlet 1118 of the dual exhaust compressor 21 through a pipeline, respectively, the sixth valve port 1116 is connected to the first exhaust port 211, the fifth valve port 1115 is connected to the second exhaust port 212, and the second valve port 1112 is connected to the second valve port 1112 of the dual exhaust compressor 21 through a pipeline; the first port 1111 is connected to the outdoor heat exchanger 22, the third port 1113 is connected to the second indoor heat exchanger 233, and the fourth port 1114 is connected to the first indoor heat exchanger 232. In addition, the outdoor heat exchanger 22 is connected to the first indoor heat exchanger 232 and the second indoor heat exchanger 233 through a pipeline, and a first throttling part 241, a second throttling part 242, and a third throttling part 243 are provided in the pipeline to throttle the refrigerant flowing through the outdoor heat exchanger 22, the first indoor heat exchanger 232, and the second indoor heat exchanger 233, respectively.

In one embodiment of the air conditioning system 2 described above, as shown in fig. 2-4 and 8, the air conditioning system 2 is in a cooling mode.

In the multi-position directional control valve 1, the pilot valve block 122 of the pilot valve 12 is moved to the right position by the solenoid controller 123 and the pressure, so that the left end pressure of the main valve body 11 is increased, and the main valve block 112 is driven to move to the right position. At this time, the first port 1111 of the main valve body 11 communicates with the fifth port 1115 and the sixth port 1116, and the second port 1112 communicates with the third port 1113 and the fourth port 1114. High-temperature and high-pressure refrigerants discharged from the first exhaust port 211 and the second exhaust port 212 of the dual-exhaust compressor 21 flow into the main valve body 11 of the multi-position directional control valve 1 through the sixth port 1116 and the fifth port 1115 respectively, flow into the outdoor heat exchanger 22 through the first port 1111, condense the heat-released refrigerants, flow into the first indoor heat exchanger 232 and the second indoor heat exchanger 233 of the indoor heat exchanger assembly 23 respectively after being throttled, and perform evaporation and heat absorption. At this time, the wind shielding structure 234 is in an open state, that is, the wind shielding structure 234 does not shield the second indoor heat exchanger 233, the airflow generated by the indoor fan 34 sequentially passes through the first indoor heat exchanger 232 and the second indoor heat exchanger 233 to promote heat exchange, the cooling effect is realized by sending cold air to the outside, the refrigerant which completes evaporation and heat absorption flows into the main valve body 11 of the multi-position reversing valve 1 through the third valve port 1113 and the fourth valve port 1114, and then flows back into the dual-exhaust compressor 21 through the second valve port 1112 and the return air port 213 of the dual-exhaust compressor 21, thereby completing a refrigeration cycle.

In one embodiment of the air conditioning system 2, as shown in fig. 2, 3, 6 and 9, the air conditioning system 2 is in a heating mode.

In the multi-position directional control valve 1, the pilot valve block 122 of the pilot valve 12 is moved to the left position by the solenoid controller 123 and the pressure, so that the pressure of the right end of the main valve body 11 is increased, and the main valve block 112 is driven to move to the left position. At this time, the first port 1111 and the second port 1112 of the main valve body 11 communicate with each other, the third port 1113 and the sixth port 1116 communicate with each other, and the fourth port 1114 and the fifth port 1115 communicate with each other. The high-temperature and high-pressure refrigerant discharged from the first exhaust port 211 and the second exhaust port 212 of the dual exhaust compressor 21 flows into the main valve body 11 of the multi-position directional control valve 1 through the sixth port 1116 and the fifth port 1115, flows into the first indoor heat exchanger 232 and the second indoor heat exchanger 233 through the fourth port 1114 and the third port 1113, and is condensed and released heat in the first indoor heat exchanger 232 and the second indoor heat exchanger 233. At this time, the wind shielding structure 234 is in an open state, that is, the wind shielding structure 234 does not shield the second indoor heat exchanger 233, and the airflow generated by the indoor fan 34 sequentially passes through the first indoor heat exchanger 232 and the second indoor heat exchanger 233 to promote heat exchange, thereby achieving a heating effect by sending hot wind to the outside. The refrigerant that has finished condensing and releasing heat flows into the outdoor heat exchanger 22 after being throttled, and evaporates to absorb heat, and the refrigerant that has finished evaporating and absorbing heat flows into the main valve body 11 of the multi-position reversing valve 1 through the first valve port 1111, and then flows back into the dual exhaust compressor 21 through the second valve port 1112 and the return air port 213 of the dual exhaust compressor 21, thereby completing one heating cycle.

In one embodiment of the air conditioning system 2 described above, the air conditioning system 2 is in a defrost mode, as shown in fig. 2, 3, 10, and 11.

In the multi-position directional control valve 1, the solenoid controller 123 of the pilot valve 12 is in the de-energized state, and the pilot valve block 122 is in the middle position (i.e., the initial position of the pilot valve block 122), so that the pressures at the left and right ends of the main valve body 11 are the same, and the main valve block 112 is maintained in the middle position (i.e., the initial position of the main valve block 112). At this time, the first port 1111 and the sixth port 1116 of the main valve body 11 communicate with each other, the second port 1112 and the third port 1113 communicate with each other, and the fourth port 1114 and the fifth port 1115 communicate with each other. The high temperature and high pressure refrigerant discharged from the first exhaust port 211 of the dual exhaust compressor 21 flows into the main valve body 11 of the multi-position reversing valve 1 through the sixth port 1116, and flows into the outdoor heat exchanger 22 through the first port 1111; meanwhile, the high-temperature and high-pressure refrigerant discharged from the second discharge port 212 of the dual exhaust compressor 21 flows into the main valve body 11 of the multi-position directional control valve 1 through the fifth port 1115, and flows into the first indoor heat exchanger 232 through the fourth port 1114. The high-temperature and high-pressure refrigerant in the outdoor heat exchanger 22 is condensed to release heat, so that the temperature of the heat exchanger fins is increased, the defrosting function is realized, and the condensed refrigerant flows into the second indoor heat exchanger 233 after being throttled; the high-temperature and high-pressure refrigerant in the first indoor heat exchanger 232 is condensed to release heat, and hot air is supplied outwards under the action of the indoor fan 34 to realize a heating function, and the condensed refrigerant flows into the second indoor heat exchanger 233 after being throttled. At this time, the wind shielding structure 234 is in a closed state, that is, the wind shielding structure 234 shields the second indoor heat exchanger 233. The refrigerant evaporates and absorbs heat in the second indoor heat exchanger 233, and then flows into the main valve body 11 of the multi-directional control valve 1 through the third port 1113, and further flows back into the dual exhaust compressor 21 through the second port 1112 and the return air port 213 of the dual exhaust compressor 21, thereby completing one defrosting cycle.

If the existing four-way valve is used to realize the communication state in this embodiment, a combination of two four-way valves as shown in fig. 12 is required, and one of the four-way valves needs to be provided with a corresponding control valve in the connecting pipeline, which further increases the difficulty of connection and the complexity of the air conditioning system 2, and is not convenient for control.

In this embodiment, the first indoor heat exchanger 232 is used as a condenser to release heat, and the second indoor heat exchanger 233 is used as an evaporator to absorb heat, so that heating can be performed simultaneously in the defrosting process, and defrosting without stopping the machine is realized. Because the second indoor heat exchanger 233 is blocked, the airflow of the indoor fan 34 does not pass through the second indoor heat exchanger 233, so that cold air can be reduced and conveyed outwards, thereby realizing sectional heating and effectively improving the heating effect of the air conditioning system 2 in the defrosting mode.

It should be noted that the operation mode of the air conditioning system 2 is not limited to the types of the modes in the above embodiments, and other operation modes, such as a dehumidification mode, may also be implemented.

EXAMPLE seven

In the present embodiment, an air conditioner 3 is provided, as shown in fig. 1 and 8, the air conditioner 3 includes the air conditioning system 2, the outdoor unit casing 31, the indoor unit casing 33, the outdoor fan 32, and the indoor fan 34 in any of the above embodiments. Wherein, the double-exhaust compressor 21, the multi-position reversing valve 1, the outdoor heat exchanger 22 and the outdoor fan 32 in the air conditioning system 2 are arranged in the outdoor unit shell 31, thereby forming the outdoor unit of the air conditioner 3; the indoor heat exchanger assembly 23 and the indoor fan 34 in the air conditioning system 2 are provided in the indoor unit casing 33, thereby forming an indoor unit of the air conditioner 3. The indoor unit and the outdoor unit are integrally formed, so that the indoor unit and the outdoor unit are convenient to transport and install.

In addition, the air conditioner 3 in this embodiment also has all the beneficial effects of the air conditioning system 2 in any of the above embodiments, which are not described herein again.

In one embodiment of the present application, a multi-position directional control valve is provided, which comprises a main valve body, a pilot valve and a connection pipe thereof, wherein the pilot valve comprises a pilot valve slider, a pilot valve housing, four connection pipes, springs at two sides of the valve body, and a corresponding electromagnetic control device. The main valve body consists of a main valve block, springs at two sides and six main connecting channels, wherein two channels in the main connecting channels and the sealing end at the spring of the valve body are connected with four connecting pipes of the pilot valve.

In one embodiment of the application, a double exhaust heat pump system applying a multi-position reversing valve is provided, and comprises a double exhaust compressor, the multi-position reversing valve, an outdoor heat exchanger, a throttling device and an indoor heat exchanger, wherein the indoor heat exchanger is formed by arranging two heat exchangers in parallel in an air duct, and an air valve for controlling an air port is arranged in the air duct. The double exhaust heat pump system is not only suitable for a household air conditioning heat pump system, but also suitable for an automobile heat pump system. The dual exhaust heat pump system has the following modes of operation:

firstly, a refrigeration mode. Two exhaust ports of the compressor are connected with the outdoor heat exchanger through a multi-position reversing valve, the condensed air enters the two indoor heat exchangers after being throttled by the first throttling component, and an outlet of the indoor heat exchanger is connected with an air suction port of the double-exhaust compressor through the multi-position reversing valve. Wherein the blast gate is in the right side, and wind loops through two heat exchangers in proper order and realizes the refrigeration function. The function can be realized by two four-way reversing valves and a plurality of valve groups, but the function can be realized by one multi-position reversing valve, so that the pipeline connection is simplified.

The specific implementation mode is as follows: the sixth connecting pipe is communicated with the exhaust port of the compressor and is in a high-pressure state, the second connecting pipe is communicated with the air suction port of the compressor and is in a low-pressure state, the left electromagnetic control of the pilot valve is in a repulsion state, the right electromagnetic control of the pilot valve is in an attraction state, under the action of pressure difference and driving force, the slide block of the pilot valve moves to the right, the sixth connecting pipe is communicated with the left spring sealing end of the main valve body, the second connecting pipe is communicated with the right spring sealing end of the main valve body, and therefore pressure difference is formed on the main valve to push the valve block of the main valve body to move to the right, and the functions of two four-way reversing valves are achieved. At this time, the sixth connecting pipe and the fifth connecting pipe are communicated with the first connecting pipe, and the second connecting pipe, the third connecting pipe and the fourth connecting pipe are communicated with each other.

And secondly, a heating mode. Two exhaust ports of the compressor are connected with the indoor heat exchanger through a multi-position reversing valve, the two exhaust ports are throttled by the second throttling component and the third throttling component after heat exchange is carried out by the indoor heat exchanger and then enter the outdoor heat exchanger, and an outlet of the outdoor heat exchanger is connected with an air suction port of the double-exhaust compressor through the multi-position reversing valve. Wherein the blast gate is in the right side, and wind loops through two heat exchangers in proper order and realizes the heating function. Because the pressure of two exhausts is different, namely the condensing temperature of indoor heat exchanger is different, the condensing temperature of windward side is lower, the condensing pressure of leeward side is higher to realize the step heating of wind, reduced the compression consumption of system.

The specific implementation mode is as follows: the sixth connecting pipe is communicated with the exhaust port of the compressor and is in a high-pressure state, the second connecting pipe is communicated with the air suction port of the compressor and is in a low-pressure state, at the moment, the left electromagnetic control of the pilot valve is in an attraction state, and the right electromagnetic control is in a repulsion state, so that the pilot valve is pushed to move left. The sixth connecting pipe is communicated with the right spring sealing end of the main valve body, and the second connecting pipe is communicated with the left spring sealing end of the main valve body, so that pressure difference is formed on the main valve, the valve block of the main valve body is pushed to move leftwards, and the functions of two four-way reversing valves are realized. At this time, the sixth connecting pipe is communicated with the third connecting pipe, the fifth connecting pipe is communicated with the fourth connecting pipe, and the second connecting pipe is communicated with the first connecting pipe.

And thirdly, defrosting mode. Two exhaust ports of the compressor are connected with one of the outdoor heat exchanger and the indoor heat exchanger through the multi-position reversing valve, the refrigerant after heat exchange of the outdoor heat exchanger is throttled through the first throttling component, the refrigerant after heat exchange of the indoor heat exchanger is throttled through the second throttling component, the refrigerant and the refrigerant are converged, then flow through the indoor heat exchanger, pass through the multi-position reversing valve and then return to an air suction port of the double-exhaust compressor. Wherein the air valve is arranged on the left side, and air only passes through the indoor high-temperature heat exchanger, so that the defrosting without stopping is realized. The initial mode can also be realized by changing the wind direction to change the wind valve to the right side.

The specific implementation mode is as follows: the sixth connecting pipe is communicated with the exhaust port of the compressor and is in a high-pressure state, the second connecting pipe is communicated with the air suction port of the compressor and is in a low-pressure state, the electromagnetic control on the left side and the right side of the pilot valve is in a closed state, and the pilot valve is in a middle balance state. The sixth connecting pipe is communicated with the left spring sealing end and the right spring sealing end of the main valve body, and the main valve body is also in a middle balance state, so that the functions of two four-way reversing valves are realized. At this time, the sixth connecting pipe is communicated with the first connecting pipe, the fifth connecting pipe is communicated with the fourth connecting pipe, and the second connecting pipe is communicated with the third connecting pipe.

The technical scheme according to some embodiments of the application is described in detail above with reference to the accompanying drawings, and can realize the refrigerant flow direction of the air-conditioning system by changing the communication state of the valve port, reduce the number of reversing valves in the air-conditioning system, reduce the complexity and control difficulty of the air-conditioning system, and be favorable for reducing the cost.

In embodiments according to the present application, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. Specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

In the description of the embodiments according to the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred devices or units must have a specific direction, be configured and operated in a specific orientation, and thus, should not be construed as limiting the technical aspects of the present application.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example in accordance with the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the purpose of illustrating preferred embodiments of the present application and is not intended to limit the technical solutions of the present application, and it will be apparent to those skilled in the art that various modifications and variations can be made in the technical solutions of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the technical scheme of the application shall be included in the protection scope of the application.

Claims

1. A multi-position reversing valve for an air conditioning system including dual exhaust compressors, comprising:

the main valve body is provided with a plurality of valve ports, and at least part of the valve ports are communicated with each other;

the pilot valve is communicated with the main valve body through a connecting pipe and can change the communication state among the valve ports;

at least two valve ports are refrigerant inlets and are used for being connected with exhaust ports of the double-exhaust compressor.

2. The multi-position reversing valve according to claim 1, wherein the main valve body comprises:

a main valve housing;

a main valve block disposed in the main valve housing;

the plurality of valve ports are arranged on the main valve housing, and the pilot valve can drive the main valve block to move in the main valve housing so as to change the communication state among the plurality of valve ports.

3. The multi-position reversing valve according to claim 2, wherein the main valve block comprises:

the valve block comprises a valve block body, wherein end plates are arranged at two ends of the valve block body respectively, abut against the inner side wall of the main valve shell and are connected with one opposite end of the main valve shell through a spring;

the first sealing structure is arranged between the two end plates and is connected with the valve block body, and the first sealing structure is of a groove-shaped structure and surrounds the side wall of one side of the main valve shell to form a first cavity;

the second sealing structure is connected to the position, between the two end plates, on the valve block body, and the second sealing structure and the first sealing structure are arranged at intervals;

the valve ports are respectively arranged on two sides of the main valve shell, the first sealing structure, the second sealing structure, one end plate and the side wall of the main valve shell surround to form a second cavity, the second sealing structure, the other end plate and the side wall of the main valve shell surround to form a third cavity, and the second cavity is isolated from the third cavity.

4. The multi-position reversing valve according to claim 3, wherein the plurality of valve ports comprises:

two end valve ports respectively arranged at two ends of the main valve shell;

the first valve port, the second valve port, the third valve port and the fourth valve port are arranged on one side of the main valve shell, the fifth valve port and the sixth valve port are the refrigerant inlet and are arranged on the other side of the main valve shell, when the main valve block is in an initial position, the first valve port and the sixth valve port are communicated through the second chamber, the second valve port and the third valve port are communicated through the first chamber, and the fourth valve port and the fifth valve port are communicated through the third chamber;

wherein, when the main valve block moves to a first position, the first valve port, the fifth valve port and the sixth valve port are communicated through the second chamber, and the second valve port, the third valve port and the fourth valve port are communicated through the first chamber; the main valve block moves to a second position, the first valve port and the second valve port are communicated through the first chamber, the third valve port and the sixth valve port are communicated through the second chamber, and the fourth valve port and the fifth valve port are communicated through the third chamber.

5. The multi-position reversing valve according to claim 4, wherein the pilot valve comprises:

the two sides of the pilot valve shell are respectively provided with a communicating port;

the pilot valve block is arranged in the pilot valve shell, two ends of the pilot valve block are respectively connected with two ends of the pilot valve shell through springs, and the pilot valve block is of a groove-shaped structure and forms a fourth cavity by being surrounded with the side wall of one side of the pilot valve shell;

and the electromagnetic controller is used for driving the pilot valve block to move.

6. The multi-position reversing valve according to claim 5,

a first communication port is arranged on one side, far away from the fourth cavity, of the pilot valve shell and is communicated with the sixth valve port through a connecting pipe;

a second communication port, a third communication port and a fourth communication port are arranged on one side, close to the fourth chamber, of the pilot valve shell, the second communication port and the fourth communication port are communicated with two end valve ports of the main valve body through connecting pipes, and the third communication port is communicated with the second valve port through connecting pipes;

when the pilot valve block is located at an initial position, the second communication port and the fourth communication port are located outside the fourth chamber, and the third communication port is located inside the fourth chamber; the pilot valve block moves to a third position, the first communication port is communicated with the second communication port, the third communication port is communicated with the fourth communication port, and the main valve block is driven to move to the first position; and the pilot valve block moves to a fourth position, the first communication port is communicated with the fourth communication port, the second communication port is communicated with the third communication port, and the main valve block is driven to move to the second position.

7. An air conditioning system, comprising:

a double exhaust compressor;

the multi-position reversing valve as claimed in any one of claims 1 to 6, wherein two refrigerant inlets of a main valve body of the multi-position reversing valve are connected with two exhaust ports of the dual exhaust compressor through pipelines, and one valve port of the main valve body is connected with a return air port of the dual exhaust compressor;

the outdoor heat exchanger and the indoor heat exchanger assembly are respectively connected with different valve ports on the multi-position reversing valve through pipelines to form a loop;

and a throttling part is arranged in a pipeline between the outdoor heat exchanger and the indoor heat exchanger assembly.

8. The air conditioning system of claim 7, wherein the indoor heat exchanger assembly comprises:

a ventilation cavity;

the first indoor heat exchanger and the second indoor heat exchanger are arranged in the air passing cavity and are arranged at intervals along the extending direction of the air passing cavity;

the wind shielding structure is movably arranged between the first indoor heat exchanger and the second indoor heat exchanger and can shield airflow flowing to the second indoor heat exchanger.

9. The air conditioning system of claim 8,

the second indoor heat exchanger is arranged on the leeward side of the first indoor heat exchanger, and the cross-sectional area of the second indoor heat exchanger is smaller than that of the first indoor heat exchanger.

10. An air conditioner, comprising:

the air conditioning system as claimed in any one of claims 7 to 9;

the double-exhaust compressor, the multi-position reversing valve and the outdoor heat exchanger of the air conditioning system are arranged in the outdoor unit shell;

the outdoor fan is arranged in the outdoor unit shell and corresponds to the outdoor heat exchanger;

the indoor heat exchanger assembly of the air conditioning system is arranged in the indoor machine shell;

and the indoor fan is arranged in the indoor unit shell and corresponds to the air passing cavity of the indoor heat exchanger assembly.