Reversing valve and air conditioning system having the same

Abstract

One embodiment of the present invention relates to the technical field of air conditioners, and particularly to a reversing valve and an air conditioning system having the same. A reversing valve provided in one embodiment of the present invention includes a pressurizing device connected between a main valve and a pilot valve, and the pressurizing device is respectively in communication with the main valve and the pilot valve; the pressurizing device can pressurize the pilot valve to provide a pressure difference for the main valve to reverse. One embodiment of the present invention also provides an air conditioning system, including a compressor and the above-mentioned reversing valve. Compared with the prior art, the advantages of one embodiment of the present invention are as follows: by providing a pressurizing device between the main valve and the pilot valve, compared with the traditional reversing valve that uses the pressure difference of the unit itself to reverse, the present application can establish the high and low pressure difference in the main valve faster and more conveniently to realize the reversal of the reversing valve, thus reducing energy consumption, and can also realize the reversal at any time according to the actual reversing requirement, improving the working efficiency of the reversing valve and avoiding energy waste.

Description

Technical Field

[0001] One embodiment of the present invention relates to the technical field of valves, and particularly to a reversing valve and an air-conditioning system having the same. Background Art

[0002] The reversing valve is an important component of a heat pump type air conditioner, including an electromagnetic coil, a pilot valve, and a main valve. The main valve is reversed through the combined action of the electromagnetic coil and the pilot valve to switch the flow direction of the refrigerant, so that the air conditioner can switch between the refrigeration and heating working states.

[0003] The pressure difference of the existing reversing valve is usually established by the compressor in the air-conditioning system. Since the compressor in the air-conditioning system needs to drive the entire system to establish the pressure difference and the connecting pipeline is too long, the entire process of the reversing valve realizing refrigeration and heating through commutation takes a long time and consumes a high amount of energy. Summary of the Invention

[0004] In view of this, in order to solve the above technical problems, one embodiment of the present invention provides a reversing valve capable of quickly reversing.

[0005] In one embodiment of the present invention, in order to solve the above technical problems, the following technical solutions are provided:

[0006] A reversing valve provided in one embodiment of the present invention includes a main valve and a pilot valve that are interconnected, and the pilot valve drives the main valve to realize the commutation of the reversing valve; the reversing valve further includes a pressurizing device connected between the main valve and the pilot valve, and the pressurizing device is respectively interconnected with the main valve and the pilot valve; the pressurizing device can pressurize the pilot valve to provide a pressure difference for the commutation of the main valve.

[0007] It can be understood that by providing the pressurizing device between the main valve and the pilot valve in the present application, compared with the traditional reversing valve that uses the pressure difference of the unit itself for commutation, the present application can establish the high and low pressure difference in the main valve faster and more conveniently to realize the commutation of the reversing valve. In this way, the energy consumption is reduced, and the commutation can be realized at any time according to the actual commutation requirements, improving the working efficiency of the reversing valve and avoiding energy waste.

[0008] In one embodiment, the main valve includes a main valve body having a main valve chamber therein, and a third communication port communicating with the main valve chamber is formed on the main valve body; the pilot valve includes a pilot valve body having a pilot valve chamber therein, and a first communication port communicating with the pilot valve chamber is formed on the pilot valve body; a first connecting pipe is connected between the first communication port and the third communication port, and the first communication port and the third communication port communicate with each other through the first connecting pipe; the pressurizing device is disposed on the first connecting pipe, and the pressurizing device is connected to the main valve chamber and the pilot valve chamber respectively through the first connecting pipe.

[0009] In one embodiment, the main valve includes a main valve body having a main valve chamber therein, and a first communication port communicating with the main valve chamber is formed on the main valve body; the pilot valve includes a pilot valve body having a pilot valve chamber therein, and a first communication port communicating with the pilot valve chamber is formed on the pilot valve body; a first connecting pipe is connected between the first communication port and the first communication port, and the first communication port and the first communication port communicate with each other through the first connecting pipe; the pressurizing device is disposed on the first connecting pipe, and the pressurizing device is connected to the main valve chamber and the pilot valve chamber respectively through the first connecting pipe.

[0010] In one embodiment, a first communication port, a second communication port and a fourth communication port respectively communicating with the main valve chamber are further formed on the main valve body; a second communication port, a third communication port and a fourth communication port respectively communicating with the pilot valve chamber are further formed on the pilot valve body; a third connecting pipe is connected between the third communication port and the third communication port to communicate the main valve chamber and the pilot valve chamber; one end of the first connecting pipe is connected to the first communication port, and the other end is connected to the third connecting pipe.

[0011] In one embodiment, the third communication port is connected to the first communication port through a compressor in the air conditioning system, the third communication port is connected to the inlet pipeline of the compressor, and the first communication port is connected to the outlet pipeline of the compressor; one end of the first connecting pipe is connected to the first communication port, and the other end is connected to the inlet pipeline of the compressor.

[0012] In one embodiment, the main valve body includes a first end portion and a second end portion located at opposite ends of the main valve body and respectively communicating with the main valve cavity. A second connecting pipe is connected between the main valve body and the pilot valve body. One end of the second connecting pipe is connected to the second communication port, and the other end communicates with the main valve cavity through the first end portion, enabling the main valve cavity and the pilot valve cavity to communicate with each other. A fourth connecting pipe is also connected between the main valve body and the pilot valve body. One end of the fourth connecting pipe is connected to the fourth communication port, and the other end communicates with the main valve cavity through the second end portion, enabling the main valve cavity and the pilot valve cavity to communicate with each other. The reversing valve further includes a second pressure sensor and a third pressure sensor. The second pressure sensor is disposed at a position on the second connecting pipe relatively close to the first end portion, and the third pressure sensor is disposed at a position on the fourth connecting pipe relatively close to the second end portion. The second pressure sensor and the third pressure sensor are respectively used to measure the pressure values at both ends of the main valve cavity.

[0013] It can be understood that by providing the second pressure sensor and the third pressure sensor, the pressure values at both ends of the main valve cavity can be monitored in real time, thereby determining whether the reversing valve is in a normal reversing state or whether it has failed.

[0014] In one embodiment, a control device is provided on the boosting device, and the control device can control the start / stop of the boosting device.

[0015] In one embodiment, the control device includes a first pressure sensor disposed on the first connecting pipe. The first pressure sensor is disposed between the first communication port and the boosting device to control the start / stop of the boosting device.

[0016] It can be understood that by disposing the first pressure sensor between the first communication port and the boosting device to measure the pressure of the fluid flowing out of the boosting member, thereby determining whether the pressure value reaches the pressure required for commutation. If the pressure required for commutation has been reached, the boosting device is stopped, thereby realizing the immediate start and stop of the boosting device and achieving the purpose of saving energy consumption.

[0017] In one embodiment, the control device includes a controller disposed on the boosting device. The controller controls the start / stop of the boosting device by controlling the working time of the boosting device.

[0018] It can be understood that by providing the controller on the boosting device to control the working time of the boosting device, thereby realizing the immediate start and stop of the boosting device and achieving the purpose of saving energy consumption.

[0019] In one embodiment, the pressurizing device is a small compressor or a gas pump pressurizing device.

[0020] In one embodiment of the present invention, the following technical solution is also provided:

[0021] An air-conditioning system includes a compressor and a reversing valve, and the compressor is connected to the reversing valve.

[0022] Compared with the prior art, the reversing valve provided in one embodiment of the present invention can establish the high and low pressure difference in the main valve faster and more conveniently to realize the commutation of the reversing valve by arranging the pressurizing device between the main valve and the pilot valve. Compared with the traditional reversing valve that uses the pressure difference of the unit itself for commutation, this application reduces energy consumption, and can also realize commutation at any time according to actual commutation requirements, improving the working efficiency of the reversing valve and avoiding energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the reversing valve in one embodiment of the present invention;

[0024] Figure 2 is Figure 1 a partial cross-sectional structural diagram of;

[0025] Figure 3 is a schematic structural diagram of the refrigeration mode of the air-conditioning system provided in one embodiment of the present invention;

[0026] Figure 4 is a schematic structural diagram of the heating mode of the air-conditioning system provided in one embodiment of the present invention;

[0027] Figure 5 is a schematic structural diagram of the reversing valve provided in another embodiment of the present invention;

[0028] Figure 6 is a schematic structural diagram of the air-conditioning system provided in another embodiment of the present invention.

[0029] The meanings of the symbols in the figure are as follows:

[0030] 100, reversing valve; 10, main valve; 11, main valve body; 111, main valve chamber; 1111, first flow port; 1112, second flow port; 1113, third flow port; 1114, fourth flow port; 1115, first chamber; 1116, second chamber; 1117, third chamber; 112, first end; 113, second end; 12, piston unit; 121, sealing ring; 13, spool valve assembly; 20, pilot valve; 21, pilot valve body; 211, pilot valve chamber; 2111, first communication port; 2112, second communication port; 2113, third communication port; 2114, fourth communication port; 30, pressurizing device; 31, control device; 311, first pressure sensor; 40, first connecting pipe; 41, second connecting pipe; 411, second pressure sensor; 42, third connecting pipe; 43, fourth connecting pipe; 431, third pressure sensor; 44, fifth connecting pipe; 101, air conditioning system; 50, compressor; 60, outdoor unit; 70, indoor unit; 80, throttling element. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of an embodiment of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of an embodiment of the present invention. Obviously, the described embodiments are only a part of the embodiments of an embodiment of the present invention, rather than all the embodiments. Based on the embodiments in an embodiment of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of an embodiment of the present invention.

[0032] It should be noted that when a component is referred to as being "installed on" another component, it can be directly on the other component or there can also be an intermediate component. When a component is considered to be "set on" another component, it can be directly set on the other component or there may be an intermediate component at the same time. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or there may be an intermediate component at the same time.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which an embodiment of the present invention belongs. The terms used in the specification of an embodiment of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit an embodiment of the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0034] Please refer to Figures 1 to 6, a reversing valve 100 provided in an embodiment of the present invention. The reversing valve 100 is applied to an air-conditioning system 101 and realizes the switching of refrigeration, heating, and defrosting modes by switching the refrigerant flow path. In this embodiment, the reversing valve 100 is a four-way reversing valve. In other embodiments, the reversing valve 100 can also be other types of reversing valves such as a five-way reversing valve or a six-way reversing valve.

[0035] As Figure 1 shown, the reversing valve 100 provided in an embodiment of the present invention includes a main valve 10 and a pilot valve 20 that are interconnected. The pilot valve 20 drives the main valve 10 to realize the commutation of the reversing valve 100. The main valve 10 includes a main valve body 11, and a main valve chamber 111 is provided inside the main valve body 11. A third flow port 1113 communicating with the main valve chamber 111 is provided on the main valve body 11. The pilot valve 20 includes a pilot valve body 21, and a pilot valve chamber 211 is provided inside the pilot valve body 21. A first communication port 2111 communicating with the pilot valve chamber 211 is provided on the pilot valve body 21.

[0036] Further, the reversing valve 100 further includes a first connecting pipe 40. One end of the first connecting pipe 40 is connected to the first communication port 2111, and the other end is connected to the third flow port 1113, and the first communication port 2111 and the third flow port 1113 are interconnected through the first connecting pipe 40.

[0037] Further, a second flow port 1112, a third flow port 1113, and a fourth flow port 1114 corresponding to the first flow port 1111 are also provided on the main valve body 11. That is, the first flow port 1111 is provided on one side surface of the main valve body 11, and the second flow port 1112, the third flow port 1113, and the fourth flow port 1114 are provided on the other side surface of the main valve body 11 corresponding thereto, and the second flow port 1112, the third flow port 1113, and the fourth flow port 1114 are located on the same side of the main valve body 11.

[0038] It should be noted that the first flow port 1111 is the "D" port, the second flow port 1112 is the "E" port, the third flow port 1113 is the "S" port, and the fourth flow port 1114 is the "C" port.

[0039] In other embodiments, a fifth flow port, a sixth flow port, or other flow ports may also be provided on the main valve body 11, which is not limited herein.

[0040] Further, a second communication port 2112, a third communication port 2113, and a fourth communication port 2114 corresponding to the first communication port 2111 are also provided on the pilot valve body 21. That is, the first communication port 2111 is opened on one side surface of the pilot valve body 21, and the second communication port 2112, the third communication port 2113, and the fourth communication port 2114 are opened on the other side surface corresponding to the pilot valve body 21, and the second communication port 2112, the third communication port 2113, and the fourth communication port 2114 are located on the same side of the pilot valve body 21.

[0041] It should be noted that the first communication port 2111 is the "d" port, the second communication port 2112 is the "a" port, the third communication port 2113 is the "b" port, and the fourth communication port 2114 is the "c" port.

[0042] In other embodiments, a fifth communication port, a sixth communication port, or other communication ports may also be opened on the pilot valve body 21, which is not limited herein.

[0043] Specifically, the pilot valve 20 further includes an electromagnetic coil (not shown in the figure), a pilot spool valve (not labeled in the figure), and a spring (not labeled in the figure). The pilot spool valve and the spring are connected to each other and disposed in the pilot valve cavity 211. When the electromagnetic coil is energized, the pilot spool valve slides in the direction of compressing the spring under the action of electromagnetic force; when the electromagnetic coil is de-energized, the pilot spool valve slides in the direction of the spring returning to its natural state under the action of the spring thrust. The pilot valve 20 is commutated by the pilot spool valve sliding in the pilot valve cavity 211. The electromagnetic coil is used to drive the pilot spool valve to slide in the pilot valve cavity 211.

[0044] Further, a spool valve assembly 13 capable of sliding in the main valve cavity 111 and a piston unit 12 capable of driving the spool valve assembly 13 to slide are provided in the main valve cavity 111. The spool valve assembly 13 is connected to the piston unit 12. When a pressure difference is generated at both ends of the piston unit 12, the spool valve assembly 13 can be driven to slide in the main valve cavity 111 to realize the commutation of the reversing valve 100.

[0045] Specifically, the main valve body 11 includes a first end portion 112 and a second end portion 113 located at opposite ends of the main valve body 11. The piston unit 12 divides the main valve cavity 111 into three chambers: a first chamber 1115, a second chamber 1116, and a third chamber 1117. The first chamber 1115 is located at one end close to the first end portion 112, the second chamber 1116 is located at one end close to the second end portion 113, and the third chamber 1117 is located in the space surrounded by the spool valve assembly 13.

[0046] It should be noted that the third chamber 1117 can communicate with any two adjacent communication ports among the second communication port 1112, the third communication port 1113, and the fourth communication port 1114.

[0047] It should be noted that the first chamber 1115, the second chamber 1116, and the third chamber 1117 are all sealed and non - communicating, so as to form a high - low pressure difference in the main valve chamber 111, thereby driving the movement of the piston unit 12.

[0048] In another embodiment of the present invention, the reversing valve 100 can also be set as a large - capacity four - way valve. At this time, the first flow port 1111, the second flow port 1112, the third flow port 1113, and the fourth flow port 1114 are evenly arranged around the main valve body 11, and the axes of any two adjacent flow ports among the first flow port 1111, the second flow port 1112, the third flow port 1113, and the fourth flow port 1114 are perpendicular to each other.

[0049] It should be noted that in the large - capacity four - way valve, the first flow port 1111, the second flow port 1112, the third flow port 1113, and the fourth flow port 1114 are respectively a high - pressure intake port, an evaporation port, a low - pressure exhaust port, and a condensation port. Since this is the existing characteristic of the large - capacity four - way valve, it will not be elaborated here.

[0050] Specifically, driving chambers (not shown in the figure) are formed at both ends of the piston unit 12. The driving chambers are connected to the pilot valve 20, and the piston unit 12 is driven by the pilot valve 20, so that the piston unit 12 slides in the main valve chamber 111 to realize the connection of different flow ports of the large - capacity four - way valve and the switching of the connection state.

[0051] It should be noted that the first flow port 1111 is connected to the driving chamber of the second end 113 of the main valve body 1 through the pilot valve 20, and the third flow port 1113 is connected to the driving chamber of the first end 112 of the main valve body 1 through the pilot valve 20. Since the refrigerant pressure at the first flow port 1111 is greater than the refrigerant pressure at the third flow port 1113, at this time, the piston unit 12 slides towards the first end 112 and is located at the first end 112. The first flow port 1111 is connected to the second flow port 1112, and the fourth flow port 1114 is connected to the third flow port 1113, and the air - conditioning system 101 is in a normal heating state.

[0052] When refrigeration is required, the pilot valve 20 first adjusts the position of the piston unit 12 in the main valve chamber 111, so that the first flow port 1111 is connected to the driving chamber of the first end 112 of the main valve body 11 through the pilot valve 20, and the third flow port 1113 is connected to the driving chamber of the second end 113 of the main valve body 11 through the pilot valve 20. During this process, under the action of the high - pressure refrigerant pressure in the driving chamber of the first end 112 of the main valve body 11, the piston unit 12 slides towards the second end 113 and is located at the second end 113, so that the air - conditioning system 101 is in a refrigeration state.

[0053] The reversing valve 100 provided by the present invention further includes a pressure boosting device 30. The pressure boosting device 30 is arranged on the first connecting pipe 40, and the pressure boosting device 30 is respectively communicated with the main valve cavity 111 and the pilot valve cavity 211 through the first connecting pipe 40. The pressure boosting device 30 can boost the pressure of the pilot valve 20 to provide a pressure difference for the main valve 10 to reverse.

[0054] It should be noted that the pressure difference of the existing reversing valve is usually established by the compressor in the air-conditioning system. Taking the power-off refrigeration four-way valve as an example, when the unit needs to operate in heating mode in winter, the unit first needs to operate in the refrigeration mode. After the pressure difference is established inside the reversing valve to achieve commutation, heating can be realized. This process is a process of energy loss. In addition, since the fluid discharged after being compressed by the compressor needs to flow into the pilot valve through the main valve, and then flow out of the pilot valve and flow to one end of the main valve to establish the high and low pressure differences at both ends of the main valve. This process not only takes a long time, but also needs to flow through multiple pipelines in the air-conditioning system, and the pipeline lengths in the air-conditioning system are all relatively long. During the fluid flow process, not only does the compressor continuously consume energy, but also pressure loss will occur during the fluid flow process. Therefore, the entire process of the reversing valve to achieve commutation not only takes a long time, but also consumes a high amount of energy. In this embodiment, by arranging the pressure boosting device 30 between the main valve 10 and the pilot valve 20, compared with the traditional reversing valve 100 that uses the pressure difference of the unit itself for commutation, the present application can establish the high and low pressure differences inside the main valve 10 faster and more conveniently to achieve the commutation of the reversing valve 100. In this way, the energy consumption is reduced, and commutation can be achieved at any time according to the actual commutation requirements, improving the working efficiency of the reversing valve 100 and avoiding energy waste.

[0055] In one embodiment of the present invention, the two ends of the first connecting pipe are respectively connected to the first communication port 2111 and the third flow port 1113, and the first communication port 2111 and the third flow port 1113 are communicated with each other through the first connecting pipe 40; the pressure boosting device 30 is arranged on the first connecting pipe 40, and the inlet end of the pressure boosting device 30 is connected to the third flow port 1113, and the outlet end of the pressure boosting device 30 is connected to the first communication port 2111.

[0056] In another embodiment of the present invention, that is, when the reversing valve 100 is set as a large-capacity four-way valve, the two ends of the first connecting pipe are respectively connected to the first communication port 2111 and the first flow port 1111, and the first communication port 2111 and the first flow port 1111 are communicated with each other through the first connecting pipe 40; the pressure boosting device 30 is arranged on the first connecting pipe 40, and both ends of the pressure boosting device 30 are respectively communicated with the first communication port 2111 and the first flow port 1111. Since the first flow port 1111 is also communicated with the compressor 50 in the air-conditioning system 101, it is equivalent to that the inlet of the pressure boosting device 30 is communicated with the exhaust port of the compressor 50, and the outlet of the pressure boosting device 30 is communicated with the first communication port 2111 of the pilot valve 20.

[0057] It should be noted that in the two embodiments of the present application, the supercharging device 30 can be connected either between the exhaust port of the compressor 50 and the first communication port 2111 of the pilot valve 20, or between the suction port of the compressor 50 and the first communication port 2111 of the pilot valve 20, and this is not limited herein.

[0058] Furthermore, the reversing valve 100 further includes a second connecting pipe 41, a third connecting pipe 42, and a fourth connecting pipe 43. Among them, one end of the second connecting pipe 41 is connected to the second communication port 2112, and the other end extends into the first end portion 112 to communicate with the first chamber 1115, and enables the first chamber 1115 and the second communication port 2112 to communicate with each other; one end of the third connecting pipe 42 is connected to the third communication port 2113, and the other end is connected to the third flow port 1113, and enables the third communication port 2113 and the third flow port 1113 to communicate with each other through the third connecting pipe 42; one end of the fourth connecting pipe 43 is connected to the fourth communication port 2114, and the other end extends into the second end portion 113 to communicate with the second chamber 1116, and enables the second chamber 1116 and the fourth communication port 2114 to communicate with each other.

[0059] In one embodiment, one end of the first connecting pipe 40 is connected to the first communication port 2111, and the other end is connected to the third connecting pipe 42 and communicates with the third connecting pipe 42. Since one end of the third connecting pipe 42 is connected to the third flow port 1113, connecting the first connecting pipe 40 to the third connecting pipe 42 can also enable the first connecting pipe 40 to communicate with the third flow port 1113 through the third connecting pipe 42.

[0060] Furthermore, a control device 31 is provided on the supercharging device 30, and the control device 31 is used to control the start / stop of the supercharging device 30. It should be noted that in order to further reduce energy consumption and achieve the immediate start / stop of the supercharging device 30, it is necessary to control the start / stop of the supercharging device 30. The control methods are divided into two types: controlling the working time of the supercharging device 30 and controlling the pressure state of the supercharging device 30. These two methods will be described in sequence below.

[0061] The start / stop of the supercharging device 30 is controlled by controlling the working time of the supercharging device 30. The control device 31 includes a controller provided on the supercharging device 30. The controller controls the start / stop of the supercharging device 30 by controlling the working time of the supercharging device 30.

[0062] It should be noted that the controller can be a control terminal in the reversing valve 100. The controller can transmit information by sending signals. Since the volume of the pressurizing device 30 is fixed, the fixed time required for the pressurizing process of the pressurizing device 30 can be calculated through several tests. By inputting this fixed time into the controller, the controller can control the shutdown of the pressurizing device 30 after the pressurizing device 30 has operated for this fixed time, thereby realizing the immediate start and stop of the pressurizing device 30 and achieving the purpose of saving energy consumption.

[0063] The start / stop of the pressurizing device 30 is controlled by controlling the pressure state of the pressurizing device 30. The control device 31 includes a first pressure sensor 311 disposed on the first connecting pipe 40. The first pressure sensor 311 is disposed between the first communication port 2111 and the pressurizing device 30 to control the start / stop of the pressurizing device 30.

[0064] It should be noted that since the pressure value required for the reversing valve 100 to reverse by the pressurizing device 30 is fixed, a first pressure sensor 311 is disposed between the first communication port 2111 and the pressurizing device 30 to monitor the increased pressure value of the pressurizing device 30 in real time, thereby measuring the pressure of the fluid flowing out of the pressurizing device 30 and determining whether the pressure value reaches the pressure required for reversing. If the pressure required for reversing has been reached, the pressurizing device 30 is controlled to stop working, thereby realizing the immediate start and stop of the pressurizing device 30 and achieving the purpose of saving energy consumption.

[0065] It is worth noting that the reason why the first pressure sensor 311 is disposed between the first communication port 2111 and the pressurizing device 30 instead of between the third flow port 1113 and the pressurizing device 30 is that when the pressurizing device 30 is connected to the first connecting pipe 40, the third flow port 1113 and the pressurizing device 30 are the inlet end of the pressurizing device 30, and the first communication port 2111 and the pressurizing device 30 are the outlet end of the pressurizing device 30. The inlet end is the low-pressure end, and the outlet end is the high-pressure end. What needs to be monitored here is whether the pressure value after pressurization of the pressurizing device 30 reaches the pressure required for reversing. Therefore, the first pressure sensor 311 needs to be disposed at the outlet end of the pressurizing device 30.

[0066] Preferably, the pressurizing device 30 is a small compressor or an air pump pressurizing device. And the power of the small compressor or the air pump pressurizing device is much smaller than the power of the compressor in the air-conditioning system, so as to achieve the purpose of energy conservation and consumption reduction. Of course, in other embodiments, the pressurizing device 30 can also be other types of pressurizing devices, which are not limited herein.

[0067] Further, the reversing valve 100 further includes a second pressure sensor 411 and a third pressure sensor 431. The second pressure sensor 411 is disposed on the second connecting pipe 41 near the first end 112, and the third pressure sensor 431 is disposed on the fourth connecting pipe 43 near the second end 113. The second pressure sensor 411 and the third pressure sensor 431 are respectively used to measure the pressure values of the first chamber 1115 and the second chamber 1116.

[0068] It should be noted that a pressure difference needs to be formed between the first chamber 1115 and the second chamber 1116 to push the piston unit 12 under the action of pressure. Disposing the second pressure sensor 411 at a position on the second connecting pipe 41 near the first end 112 and disposing the third pressure sensor 431 at a position on the fourth connecting pipe 43 near the second end 113 are to monitor the changes in the pressure values of the first chamber 1115 and the second chamber 1116 in real time. If a pressure difference cannot be formed between the first chamber 1115 and the second chamber 1116, it is necessary to check whether the main valve chamber 111 leaks or the piston unit 12 fails, resulting in the inability of the reversing valve 100 to normally reverse, so as to determine whether the reversing valve 100 is in a normal reversing state or fails.

[0069] As Figure 2 shown, a sealing ring 121 is provided on the piston unit 12. By providing the sealing ring 121, the tightness of the first chamber 1115 and the second chamber 1116 is ensured, preventing the first chamber 1115 and the second chamber 1116 from leaking air so that a high and low pressure difference cannot be formed in the valve chamber, and avoiding the reversing failure of the four-way reversing valve 100 due to this.

[0070] Preferably, the sealing ring 121 is an O-ring. Of course, in other embodiments, the sealing ring 121 can also be other types of sealing structures, which are not limited herein.

[0071] As Figure 3 and Figure 4 shown, in an embodiment of the present invention, an air-conditioning system 101 is further provided, including a compressor 50 and a reversing valve 100, and the compressor 50 is connected to the reversing valve 100.

[0072] Specifically, the air-conditioning system 101 further includes a fifth connecting pipe 44. The fifth connecting pipe 44 is connected between the third communication port 1113 and the first communication port 1111, and the third communication port 1113 and the first communication port 1111 are interconnected through the fifth connecting pipe 44. The compressor 50 is disposed on the fifth connecting pipe 44. The third communication port 1113 is connected to the inlet end of the compressor 50, and the first communication port 1111 is connected to the outlet end of the compressor 50.

[0073] In one embodiment, one end of the first connecting pipe 40 is connected to the first communication port 2111, and the other end is connected to the inlet pipeline of the compressor 50. Since the third communication port 1113 communicates with the inlet pipeline of the compressor 50, the first connecting pipe 40 can also be connected to the inlet pipeline of the compressor 50, and the first connecting pipe 40 is communicated with the third communication port 1113 through the third connecting pipe 42.

[0074] Further, the air-conditioning system 101 further includes an outdoor unit 60, an indoor unit 70, and a throttling element 80 located between the indoor unit 70 and the outdoor unit 60. The outlet end of the outdoor unit 60 is connected to the inlet end of the throttling element 80, and the inlet end of the outdoor unit 60 is connected to the fourth communication port 1114. The outlet end of the throttling element 80 is connected to the inlet end of the indoor unit 70, and the outlet end of the indoor unit 70 is connected to the second communication port 1112.

[0075] As Figure 3 shown, when the air-conditioning system 101 operates in the cooling mode, the electromagnetic coil is de-energized, and the spring pushes the pilot spool to slide leftward. At this time, the first communication port 2111 and the fourth communication port 2114 communicate with each other. The high-pressure fluid flowing out from the outlet end of the pressurizing device 30 flows from the first communication port 2111 to the fourth communication port 1114. The high-pressure fluid flows into the second chamber 1116 through the fourth connecting pipe 43 from the fourth communication port 1114 to form a high-pressure area. Since the third communication port 1113 is connected to the inlet end of the compressor 50, the low-pressure fluid flows into the third communication port 2113 through the third connecting pipe 42. Since the third communication port 2113 communicates with the second communication port 2112, the low-pressure fluid flows into the first chamber 1115 through the second connecting pipe 41 to form a low-pressure area. At this time, the piston unit 12 moves towards the first end portion 112 under the action of the pressure difference, and the first communication port 1111 communicates with the fourth communication port 1114. Since the first communication port 1111 is connected to the outlet end of the compressor 50, the high-pressure fluid flows from the fourth communication port 1114 into the outdoor unit 60 (as a condenser) to dissipate heat outdoors, then enters the indoor unit 70 (as an evaporator) through a capillary tube, and then flows through the indoor unit 70 into the second communication port 1112. Since the second communication port 1112 communicates with the third communication port 1113, it finally returns to the compressor 50 from the third communication port 1113 to complete the entire refrigeration cycle.

[0076] As Figure 4As shown, when the air conditioning system 101 operates in heating mode, the electromagnetic coil is energized. Under the action of the electromagnetic force, the pilot spool is pushed to slide to the right. At this time, the first communication port 2111 and the second communication port 2112 are interconnected. The high-pressure fluid flowing out from the outlet end of the pressurizing device 30 flows from the first communication port 2111 to the second flow port 1112. The high-pressure fluid flows into the first chamber 1115 through the second connecting pipe 41 from the second flow port 1112 to form a high-pressure area. Since the third flow port 1113 is connected to the inlet end of the compressor 50, the low-pressure fluid flows into the third communication port 2113 through the third connecting pipe 42. Since the third communication port 2113 and the fourth communication port 2114 are interconnected, the low-pressure fluid flows into the second chamber 1116 through the fourth connecting pipe 43 to form a low-pressure area. At this time, the piston unit 12 moves towards the second end 113 under the action of the pressure difference. The first flow port 1111 and the second flow port 1112 are interconnected. Since the first flow port 1111 is connected to the outlet end of the compressor 50, the high-pressure fluid flows from the second flow port 1112 into the indoor unit 70 (serving as a condenser) to dissipate heat indoors, then enters the outdoor unit 60 (serving as an evaporator) through the capillary tube, and then flows into the fourth flow port 1114 through the outdoor unit 60. Since the fourth flow port 1114 and the third flow port 1113 are interconnected, it finally returns to the compressor 50 from the third flow port 1113 to complete the entire heating cycle.

[0077] An embodiment of the present invention provides a reversing valve 100. By arranging a pressurizing device 30 between the main valve 10 and the pilot valve 20, compared with the traditional reversing valve that uses the pressure difference of the unit itself for commutation, the present application can establish the high and low pressure differences in the main valve 10 faster and more conveniently to realize the commutation of the reversing valve 100. In this way, the energy consumption is reduced, and the commutation can be realized at any time according to the actual commutation requirements, improving the working efficiency of the reversing valve 100 and avoiding energy waste.

[0078] As Figures 5 to 6 shown, Figure 5 is a schematic structural diagram when the reversing valve 100 is a large-capacity four-way valve, Figure 6 and Figure 5 is a schematic diagram of the connection method of the large-capacity four-way valve in the air conditioning system 101 in

[0079] It should be noted that when the reversing valve 100 is a large-capacity four-way valve, a pressurizing device 30 is connected between the first flow port 1111 and the first communication port 2111. This solution can also establish the high and low pressure differences in the main valve 10 faster and more conveniently to realize the commutation of the reversing valve 100. In this way, the energy consumption is reduced, and the commutation can be realized at any time according to the actual commutation requirements, improving the working efficiency of the reversing valve 100 and avoiding energy waste.

[0080] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0081] The above-described embodiments only represent several embodiments in one embodiment of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of one embodiment of the present invention, several modifications and improvements can be made, and these all belong to the protection scope of one embodiment of the present invention. Therefore, the protection scope of the patent in one embodiment of the present invention should be subject to the appended claims.

Claims

1. A reversing valve, comprising a main valve (10) and a pilot valve (20) that are in communication with each other, and the pilot valve (20) drives the main valve (10) to achieve the reversing of the reversing valve; It is characterized in that, The reversing valve further includes a pressure boosting device (30) connected between the main valve (10) and the pilot valve (20), and the pressure boosting device (30) is respectively in communication with the main valve (10) and the pilot valve (20); the pressure boosting device (30) can boost the pressure of the pilot valve (20) to provide a pressure difference for the main valve (10) to reverse; The main valve (10) includes a main valve body (11), a main valve cavity (111) is provided in the main valve body (11), a third flow port (1113) communicating with the main valve cavity (111) is opened on the main valve body (11), one end of the pressure boosting device (30) is in communication with the main valve cavity (111) through the third flow port (1113), and the other end is connected to the pilot valve (20); The pressure boosting device (30) is a small compressor or an air pump boosting device.

2. The reversing valve according to claim 1, characterized in that, The pilot valve (20) includes a pilot valve body (21), a pilot valve cavity (211) is provided in the pilot valve body (21), and a first communication port (2111) communicating with the pilot valve cavity (211) is opened on the pilot valve body (21); A first connecting pipe (40) is connected between the first communication port (2111) and the third flow port (1113), and the first communication port (2111) and the third flow port (1113) are in communication with each other through the first connecting pipe (40); The pressure boosting device (30) is arranged on the first connecting pipe (40), and the pressure boosting device (30) is respectively connected to the main valve cavity (111) and the pilot valve cavity (211) through the first connecting pipe (40).

3. The reversing valve according to claim 2, characterized in that, A second flow port (1112) and a fourth flow port (1114) respectively communicating with the main valve cavity (111) are further opened on the main valve body (11); A second communication port (2112), a third communication port (2113) and a fourth communication port (2114) respectively communicating with the pilot valve cavity (211) are further opened on the pilot valve body (21); A third connecting pipe (42) is connected between the third communication port (2113) and the third flow port (1113) to communicate the main valve cavity (111) and the pilot valve cavity (211); One end of the first connecting pipe (40) is connected to the first communication port (2111), and the other end is connected to the third connecting pipe (42).

4. The reversing valve according to claim 2, characterized in that, A first flow port (1111) communicating with the main valve cavity (111) is opened on the main valve body (11); the third flow port (1113) is connected to the first flow port (1111) through a compressor (50) in the air conditioning system, the third flow port (1113) is connected to the inlet pipeline of the compressor (50), and the first flow port (1111) is connected to the outlet pipeline of the compressor (50); One end of the first connecting pipe (40) is connected to the first communication port (2111), and the other end is connected to the inlet pipeline of the compressor (50).

5. The reversing valve according to claim 3, characterized in that, The main valve body (11) includes a first end portion (112) and a second end portion (113) located at opposite ends of the main valve body (11) and respectively communicating with the main valve chamber (111). A second connecting pipe (41) is connected between the main valve body (11) and the pilot valve body (21). One end of the second connecting pipe (41) is connected to the second communication port (2112), and the other end communicates with the main valve chamber (111) through the first end portion (112), enabling the main valve chamber (111) and the pilot valve chamber (211) to communicate with each other; A fourth connecting pipe (43) is also connected between the main valve body (11) and the pilot valve body (21). One end of the fourth connecting pipe (43) is connected to the fourth communication port (2114), and the other end communicates with the main valve chamber (111) through the second end portion (113), enabling the main valve chamber (111) and the pilot valve chamber (211) to communicate with each other; The reversing valve further includes a second pressure sensor (411) and a third pressure sensor (431). The second pressure sensor (411) is disposed at a position on the second connecting pipe (41) relatively close to the first end portion (112), and the third pressure sensor (431) is disposed at a position on the fourth connecting pipe (43) relatively close to the second end portion (113). The second pressure sensor (411) and the third pressure sensor (431) are respectively used to measure the pressure values at both ends of the main valve chamber (111).

6. The reversing valve according to claim 2, characterized in that, A control device (31) is provided on the boosting device (30), and the control device (31) can control the start / stop of the boosting device (30).

7. The reversing valve according to claim 6, characterized in that, The control device (31) includes a first pressure sensor (311) disposed on the first connecting pipe (40). The first pressure sensor (311) is disposed between the first communication port (2111) and the boosting device (30) to control the start / stop of the boosting device (30).

8. The reversing valve according to claim 6, characterized in that, The control device (31) includes a controller disposed on the boosting device (30), and the controller controls the start / stop of the boosting device (30) by controlling the working time of the boosting device (30).

9. An air conditioning system, characterized in that, It includes a compressor (50) and a reversing valve according to any one of claims 1-8, and the compressor (50) is connected to the reversing valve.

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