CN215059704U

CN215059704U - Reversing valve and air conditioning system with same

Info

Publication number: CN215059704U
Application number: CN202121067039.7U
Authority: CN
Inventors: 宣永斌; 何锟
Original assignee: Zhejiang Dunan Machinery Co Ltd
Current assignee: Zhejiang Dunan Machinery Co Ltd
Priority date: 2021-05-18
Filing date: 2021-05-18
Publication date: 2021-12-07
Anticipated expiration: 2031-05-18

Abstract

The utility model relates to an air conditioning technology field especially relates to a switching-over valve and have its air conditioning system. The utility model provides a reversing valve, which comprises a supercharging device connected between a main valve and a pilot valve, wherein the supercharging device is respectively communicated with the main valve and the pilot valve; the pressurization device can pressurize the pilot valve to provide a pressure differential for main valve reversal. The utility model also provides an air conditioning system, including compressor and above-mentioned switching-over valve. Compared with the prior art, the utility model has the advantages of: through set up supercharging device between main valve and pilot valve, compare and utilize unit self pressure differential switching-over in traditional switching-over valve, the switching-over of switching-over valve is realized to the high-low pressure differential that has set up in the main valve that this application can be faster more convenient, so just so reduced the energy consumption, but also can realize the switching-over at any time according to actual switching-over demand, improved the work efficiency of switching-over valve, avoided the energy waste.

Description

Reversing valve and air conditioning system with same

Technical Field

The utility model relates to a valve technical field especially relates to a switching-over valve and have its air conditioning system among the embodiment.

Background

The reversing valve is an important part of the heat pump type air conditioner and comprises an electromagnetic coil, a pilot valve and a main valve. The reversing of the main valve is realized through the combined action of the electromagnetic coil and the pilot valve so as to switch the flowing direction of the refrigerant, thereby switching the air conditioner between the two working states of refrigeration and heating.

The pressure difference of the existing reversing valve is usually established by a compressor in an air conditioning system, and the compressor in the air conditioning system needs to drive the whole system to establish the pressure difference, and a connecting pipeline is too long, so that the whole process of realizing refrigeration and heating by the reversing valve is longer, and the energy consumption is high.

SUMMERY OF THE UTILITY MODEL

In view of this, to the above technical problem, the present invention provides a direction valve capable of fast direction change.

The utility model discloses for solving above-mentioned technical problem in the embodiment, provide following technical scheme:

the utility model discloses a reversing valve that provides in the implementation mode, including main valve and pilot valve that communicate each other, the pilot valve drives the main valve realizes the switching-over of the reversing valve; the reversing valve further comprises a supercharging device connected between the main valve and the pilot valve, and the supercharging device is communicated with the main valve and the pilot valve respectively; the pressurization device is capable of pressurizing the pilot valve to provide a pressure differential at which the main valve reverses.

It can be understood that this application through the main valve with set up between the pilot valve supercharging device utilizes unit self pressure differential switching-over in comparing traditional switching-over valve, this application can be faster more convenient the establishment high-low pressure differential in the main valve realizes the switching-over of switching-over valve, so just reduced the energy consumption, but also can realize the switching-over at any time according to actual switching-over demand, improved the work efficiency of switching-over valve has avoided the energy waste.

In one embodiment, the main valve comprises a main valve body, a main valve cavity is arranged in the main valve body, and a third flow port communicated with the main valve cavity is formed in the main valve body; the pilot valve comprises a pilot valve body, a pilot valve cavity is arranged in the pilot valve body, and a first communication port communicated with the pilot valve cavity is formed in the pilot valve body; a first connecting pipe is connected between the first connecting port and the third connecting port, and the first connecting port and the third connecting port are communicated with each other through the first connecting pipe; the supercharging device is arranged on the first connecting pipe and is respectively communicated with the main valve cavity and the pilot valve cavity through the first connecting pipe.

In one embodiment, the main valve comprises a main valve body, a main valve cavity is arranged in the main valve body, and a first flow port communicated with the main valve cavity is formed in the main valve body; the pilot valve comprises a pilot valve body, a pilot valve cavity is arranged in the pilot valve body, and a first communication port communicated with the pilot valve cavity is formed in the pilot valve body; a first connecting pipe is connected between the first communication port and the first circulation port, and the first communication port and the first circulation port are communicated with each other through the first connecting pipe; the supercharging device is arranged on the first connecting pipe and is respectively communicated with the main valve cavity and the pilot valve cavity through the first connecting pipe.

In one embodiment, the main valve body is further provided with a first flow port, a second flow port and a fourth flow port which are respectively communicated with the main valve cavity; the pilot valve body is also provided with a second communicating port, a third communicating port and a fourth communicating port which are respectively communicated with the pilot valve cavity; a third connecting pipe is connected between the third communication port and the third flow port, and the main valve cavity is communicated with the pilot valve cavity; one end of the first connecting pipe is connected to the first connecting port, and the other end of the first connecting pipe is communicated with the third connecting pipe.

In one embodiment, the third circulation port is communicated with the first circulation port through a compressor in an air conditioning system, the third circulation port is connected to an inlet pipeline of the compressor, and the first circulation port is connected to an outlet pipeline of the compressor; one end of the first connecting pipe is connected to the first connecting port, and the other end of the first connecting pipe is connected to an inlet pipeline of the compressor.

In one embodiment, the main valve body comprises a first end part and a second end part which are positioned at two opposite ends of the main valve body and respectively communicated 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 communicating port, the other end of the second connecting pipe is communicated with the main valve cavity through the first end part, and the main valve cavity and the pilot valve cavity are communicated with each other; a fourth connecting pipe is connected between the main valve body and the pilot valve body, one end of the fourth connecting pipe is connected to the fourth communicating port, and the other end of the fourth connecting pipe is communicated with the main valve cavity through the second end part, so that the main valve cavity is communicated with the pilot valve cavity; the reversing valve further comprises a second pressure sensor and a third pressure sensor, the second pressure sensor is arranged at a position, close to the first end portion, on the second connecting pipe, the third pressure sensor is arranged at a position, close to the second end portion, on the fourth connecting pipe, and the second pressure sensor and the third pressure sensor are used for measuring pressure values at two ends of the main valve cavity respectively.

It can be understood that by arranging the second pressure sensor and the third pressure sensor, the pressure values at two ends of the main valve cavity can be monitored in real time, so that whether the reversing valve is in a normal reversing state or fails or not is judged.

In one embodiment, the supercharging device is provided with a control device, and the control device can control the start/stop of the supercharging device.

In one embodiment, the control device includes a first pressure sensor disposed on the first connection pipe, the first pressure sensor being disposed between the first communication port and the pressure boosting device to control activation/deactivation of the pressure boosting device.

It can be understood that, the first pressure sensor is arranged between the first communication port and the supercharging device to measure the pressure of the fluid flowing out of the supercharging component, so as to determine whether the pressure value reaches the pressure required for reversing, and if the pressure required for reversing is reached, the supercharging device is stopped, so that the supercharging device is started and stopped immediately, and the purpose of saving energy is achieved.

In one embodiment, the control device comprises a controller arranged on the supercharging device, and the controller controls the start/stop of the supercharging device by controlling the working time of the supercharging device.

It can be understood that the controller is arranged on the supercharging device to control the working time of the supercharging device, so that the supercharging device is started and stopped immediately, and the aim of saving energy is fulfilled.

In one embodiment, the boosting device is a small compressor or an air pump boosting device.

The utility model discloses an embodiment still provides following technical scheme:

an air conditioning system includes a compressor and a reversing valve, the compressor being connected to the reversing valve.

Compared with the prior art, the utility model discloses a reversing valve that provides in the embodiment, through the main valve with set up between the pilot valve supercharging device utilizes unit self pressure differential switching-over in comparing traditional reversing valve, and more convenient the establishment that can be faster in this application realizes high-low pressure differential in the main valve the switching-over of reversing valve has so just reduced the energy consumption, but also can realize the switching-over at any time according to actual switching-over demand, has improved the work efficiency of reversing valve has avoided the energy extravagant.

Drawings

Fig. 1 is a schematic structural diagram of a reversing valve according to an embodiment of the present invention;

FIG. 2 is a schematic view of the partial cross-sectional structure of FIG. 1;

fig. 3 is a schematic structural diagram of a cooling mode of an air conditioning system according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a heating mode of an air conditioning system according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a reversing valve provided in another embodiment of the present invention;

fig. 6 is a schematic structural diagram of an air conditioning system according to another embodiment of the present invention.

The symbols in the drawings represent the following meanings:

100. a diverter valve; 10. a main valve; 11. a main valve body; 111. a main valve chamber; 1111. a first circulation port; 1112. a second flow port; 1113. a third flow port; 1114. a fourth flow port; 1115. a first chamber; 1116. a second chamber; 1117. a third chamber; 112. a first end portion; 113. a second end portion; 12. a piston unit; 121. a seal ring; 13. a spool valve assembly; 20. a pilot valve; 21. a pilot valve body; 211. a valve guide cavity; 2111. a first communication port; 2112. a second communication port; 2113. a third communication port; 2114. a fourth communication port; 30. a pressure boosting device; 31. a control device; 311. a first pressure sensor; 40. a first connecting pipe; 41. a second connecting pipe; 411. a second pressure sensor; 42. a third connecting pipe; 43. a fourth connecting pipe; 431. a third pressure sensor; 44. a fifth connecting pipe; 101. an air conditioning system; 50. a compressor; 60. an outdoor unit; 70. an indoor unit; 80. a throttling element.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of an embodiment of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs in one embodiment of the present invention. The terminology used herein in the description of one embodiment of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of one embodiment of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 6, in an embodiment of a reversing valve 100 provided in the present invention, the reversing valve 100 is applied to an air conditioning system 101, and switches between cooling, heating and defrosting modes by switching a flow path of a refrigerant. In this embodiment, the directional valve 100 is a four-way directional valve, and in other embodiments, the directional valve 100 may also be a five-way directional valve, a six-way directional valve, or other types of directional valves.

As shown in fig. 1, a reversing valve 100 provided in an embodiment of the present invention includes a main valve 10 and a pilot valve 20 that are communicated with each other, and the pilot valve 20 drives the main valve 10 to reverse the reversing valve 100. The main valve 10 includes a main valve body 11, and the main valve body 11 has a main valve chamber 111 therein. The main valve body 11 is provided with a third flow port 1113 communicating with the main valve chamber 111. The pilot valve 20 comprises a pilot valve body 21, and a pilot valve cavity 211 is arranged in the pilot valve body 21. The pilot valve body 21 is provided with a first communication port 2111 communicating with the pilot valve chamber 211.

Further, the direction valve 100 further includes a first connection pipe 40. The first connection pipe 40 has one end connected to the first communication port 2111 and the other end connected to the third communication port 1113, and the first communication port 2111 and the third communication port 1113 communicate with each other through the first connection pipe 40.

Further, the main valve body 11 is provided with a second port 1112, a third port 1113, and a fourth port 1114 provided corresponding to the first port 1111. That is, the first port 1111 opens on one side surface of the main valve body 11, the second port 1112, the third port 1113, and the fourth port 1114 open on the other side surface of the main valve body 11, and the second port 1112, the third port 1113, and the fourth port 1114 are located on the same side of the main valve body 11.

The first port 1111 is a "D" port, the second port 1112 is an "E" port, the third port 1113 is an "S" port, and the fourth port 1114 is a "C" port.

In other embodiments, the main valve body 11 may further have a fifth flow port, a sixth flow port, or other flow ports, which are not limited herein.

Further, the pilot valve body 21 is also provided with a second communication port 2112, a third communication port 2113, and a fourth communication port 2114 which correspond to the first communication port 2111. That is, the first communication port 2111 is opened to one side surface of the valve body 21, the second communication port 2112, the third communication port 2113, and the fourth communication port 2114 are opened to the other side surface of the valve body 21 corresponding thereto, 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 valve body 21.

Note that the first communication port 2111 is a "d" port, the second communication port 2112 is an "a" port, the third communication port 2113 is a "b" port, and the fourth communication port 2114 is a "c" port.

In other embodiments, the pilot valve body 21 may further have a fifth communication port, a sixth communication port, or other communication ports, which are not limited herein.

Specifically, pilot valve 20 also includes a solenoid (not shown), a pilot spool (not shown), and a spring (not shown). The pilot spool and the spring are disposed in the pilot chamber 211 in connection with each other. When the electromagnetic coil is electrified, the pilot spool slides towards the direction of the compression spring under the action of electromagnetic force; when the solenoid is de-energized, the pilot spool slides under spring thrust toward the direction in which the spring returns to its natural state. Commutation of the pilot valve 20 is achieved by the pilot spool sliding within the pilot valve cavity 211. The solenoid is used to drive the pilot spool to slide within the pilot valve cavity 211.

Further, a spool assembly 13 slidable in the main valve chamber 111 and a piston unit 12 capable of driving the spool assembly 13 to slide are provided in the main valve chamber 111. The spool valve assembly 13 is connected to the piston unit 12. When a pressure differential is created across the piston unit 12, the spool valve assembly 13 can be actuated to slide within the main valve chamber 111 to effect reversal of the reversing valve 100.

Specifically, main valve body 11 includes a first end 112 and a second end 113 at opposite ends of main valve body 11. The piston unit 12 divides the main valve chamber 111 into three chambers, a first chamber 1115, a second chamber 1116 and a third chamber 1117. First chamber 1115 is located near the end of first end 112, second chamber 1116 is located near the end of second end 113, and third chamber 1117 is located within the volume enclosed by spool valve assembly 13.

The third chamber 1117 can communicate with any two adjacent flow ports among the second flow port 1112, the third flow port 1113, and the fourth flow port 1114.

It is noted that the first chamber 1115, the second chamber 1116 and the third chamber 1117 are sealed and do not communicate with each other, so that a high-low pressure differential can be created in the primary valve chamber 111 to drive the movement of the piston unit 12.

In another embodiment of the present invention, the reversing valve 100 can also be configured as a high-capacity four-way valve. In this case, the first port 1111, the second port 1112, the third port 1113, and the fourth port 1114 are uniformly opened around the main valve body 11, and the axes of any two adjacent ports of the first port 1111, the second port 1112, the third port 1113, and the fourth port 1114 are perpendicular to each other.

In the high-capacity four-way valve, the first port 1111, the second port 1112, the third port 1113, and the fourth port 1114 are a high-pressure intake port, an evaporation port, a low-pressure exhaust port, and a condensation port, respectively. Because the prior characteristic of the high-capacity four-way valve is adopted here, the description is omitted.

Specifically, a driving chamber (not shown) is formed at each end of the piston unit 12, and the driving chamber is 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, thereby realizing communication and switching of communication states of different flow ports of the high-capacity four-way valve.

The first port 1111 is connected to the driving chamber of the second end portion 113 of the main valve body 1 through the pilot valve 20, the third port 1113 is connected to the driving chamber of the first end portion 112 of the main valve body 1 through the pilot valve 20, and since the refrigerant pressure at the first port 1111 is higher than the refrigerant pressure at the third port 1113, the piston unit 12 slides toward the first end portion 112 and is positioned at the first end portion 112, the first port 1111 is connected to the second port 1112, the fourth port 1114 is connected to the third port 1113, and the air conditioning system 101 is in a normal heating state.

When cooling is required, the pilot valve 20 first adjusts the position of the piston unit 12 in the main valve chamber 111 such that the first flow port 1111 is communicated with the drive chamber of the first end portion 112 of the main valve body 11 through the pilot valve 20, and the third flow port 1113 is communicated with the drive chamber of the second end portion 113 of the main valve body 11 through the pilot valve 20, and in this process, the piston unit 12 slides toward the second end portion 113 and is positioned at the second end portion 113 under the high-pressure refrigerant pressure in the drive chamber of the first end portion 112 of the main valve body 11, so that the air conditioning system 101 is in a cooling state.

The utility model provides a switching-over valve 100 still includes supercharging device 30, and supercharging device 30 sets up on first connecting pipe 40, and supercharging device 30 is linked together with main valve chamber 111 and pilot valve chamber 211 respectively through first connecting pipe 40. The pressurization device 30 is capable of pressurizing the pilot valve 20 to provide a pressure differential that reverses the main valve 10.

It should be noted that the pressure differential across the existing reversing valve is typically established by the compressor in the air conditioning system. Taking a power-off refrigeration four-way valve as an example, when a unit needs to run for heating in winter, the unit firstly needs to run in a refrigeration mode, and heating can be realized only after a pressure difference is built inside a reversing valve to realize reversing, and the process is an energy loss process; in addition, because the fluid discharged after being compressed by the compressor needs to flow into the pilot valve through the main valve and then flows out of the pilot valve to flow to one end of the main valve to establish the high-low pressure difference at two ends of the main valve, the process is not only time-consuming, but also needs to flow through a plurality of pipelines in the air conditioning system, the length of the pipelines in the air conditioning system is long, the compressor continuously consumes energy in the flowing process of the fluid, and the fluid also generates pressure loss in the flowing process, so the whole process of realizing the reversing of the reversing valve is not only time-consuming, but also high in energy consumption. In the present embodiment, the pressurization device 30 is disposed between the main valve 10 and the pilot valve 20, and compared with the conventional reversing valve 100, the reversing valve utilizes the pressure difference of the unit itself to reverse, and the reversing valve 100 can be quickly and conveniently implemented by establishing the high-low pressure difference in the main valve 10. Therefore, the energy consumption is reduced, the reversing can be realized at any time according to the actual reversing requirement, the working efficiency of the reversing valve 100 is improved, and the energy waste is avoided.

In one embodiment of the present invention, the first connection pipe has two ends respectively connected to the first connection port 2111 and the third communication port 1113, and the first connection port 2111 and the third communication port 1113 are connected to each other through the first connection pipe 40; the pressure boosting device 30 is provided on the first connection pipe 40, and an inlet end of the pressure boosting device 30 is connected to the third communication port 1113, and an outlet end of the pressure boosting device 30 is connected to the first communication port 2111.

In another embodiment of the present invention, that is, when the direction valve 100 is configured as a high capacity four-way valve, both ends of the first connection pipe are respectively connected to the first communication port 2111 and the first circulation port 1111, and the first communication port 2111 and the first circulation port 1111 are communicated with each other through the first connection pipe 40; the pressure boosting device 30 is provided on the first connection pipe 40, and both ends of the pressure boosting device 30 communicate with the first communication port 2111 and the first circulation port 1111, respectively. Since the first communication port 1111 is also communicated with the compressor 50 in the air conditioning system 101, it corresponds to the case where the inlet of the booster device 30 is communicated with the exhaust port of the compressor 50, and the outlet of the booster device 30 is communicated with the first communication port 2111 of the pilot valve 20.

In both embodiments of the present application, the booster device 30 may be connected between the exhaust port of the compressor 50 and the first communication port 2111 of the pilot valve 20, or may be connected between the intake port of the compressor 50 and the first communication port 2111 of the pilot valve 20, and is not limited thereto.

Further, the direction valve 100 further includes a second connection pipe 41, a third connection pipe 42, and a fourth connection pipe 43. Wherein, 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 the first chamber 1115 and the second communication port 2112 are communicated; the third connection pipe 42 has one end connected to the third communication port 2113 and the other end connected to the third communication port 1113, and the third communication port 2113 and the third communication port 1113 are communicated with each other through the third connection pipe 42; the fourth connection pipe 43 has one end connected to the fourth communication port 2114 and the other end extending into the second end portion 113 to communicate with the second chamber 1116, and communicates the second chamber 1116 and the fourth communication port 2114.

In one embodiment, the first connection tube 40 is connected to the first connection port 2111 at one end and connected to the third connection tube 42 at the other end, and communicates with the third connection tube 42. Since one end of the third connection pipe 42 communicates with the third communication port 1113, it is also possible to connect the first connection pipe 40 with the third connection pipe 42 and to communicate the first connection pipe 40 with the third communication port 1113 through the third connection pipe 42.

Further, a control device 31 is provided on the supercharging device 30, and the control device 31 is used for controlling the start/stop of the supercharging device 30. It should be noted that, in order to further reduce energy consumption and achieve the instant start-stop of the supercharging device 30, the start-stop of the supercharging device 30 needs to be controlled. The control method is divided into two types, i.e., the control of the operating time of the supercharging device 30 and the control of the pressure state of the supercharging device 30. These two ways will now be explained in turn.

The activation/deactivation of the booster device 30 is controlled by controlling the operation time of the booster device 30. The control device 31 includes a controller provided on the supercharging device 30. The controller controls the activation/deactivation of the booster device 30 by controlling the operation time of the booster device 30.

It should be noted that the controller may be a control terminal of the directional valve 100. The controller can transmit information by sending signals, and because the volume of the supercharging device 30 is fixed, the fixed time required by the supercharging device 30 in the supercharging process can be calculated through a plurality of tests, and the fixed time is input into the controller, so that the controller can control the supercharging device 30 to be closed after the supercharging device 30 runs for the fixed time, and the supercharging device 30 can be started and stopped immediately, and the aim of saving energy is fulfilled.

The activation/deactivation of the booster device 30 is controlled by controlling the pressure state of the booster device 30. The control device 31 includes a first pressure sensor 311 provided on the first connection pipe 40, and the first pressure sensor 311 is provided between the first communication port 2111 and the pressure increasing device 30 to control the start/stop of the pressure increasing device 30.

It should be noted that, because the pressure device 30 makes the pressure value required for reversing the direction valve 100 fixed through pressurization, the first pressure sensor 311 is disposed between the first communication port 2111 and the pressure device 30 to monitor the pressure value increased by the pressure device 30 in real time, so as to measure the pressure of the fluid flowing out of the pressure device 30, and determine whether the pressure value reaches the pressure required for reversing, if the pressure value reaches the pressure required for reversing, the pressure device 30 is controlled to stop working, so that the pressure device 30 is started and stopped immediately, and the purpose of saving energy is achieved.

It should be noted that the first pressure sensor 311 is disposed between the first communication port 2111 and the pressure boosting device 30, but not between the third communication port 1113 and the pressure boosting device 30, because when the pressure boosting device 30 is connected to the first connection pipe 40, an inlet end of the pressure boosting device 30 is disposed between the third communication port 1113 and the pressure boosting device 30, and an outlet end of the pressure boosting device 30 is disposed between the first communication port 2111 and the pressure boosting device 30. The inlet end is a low pressure end and the outlet end is a high pressure end. Here, it is monitored whether the pressure value after the pressurization by the pressurization device 30 reaches the pressure required for the commutation, and therefore, the first pressure sensor 311 needs to be disposed at the outlet end of the pressurization device 30.

Preferably, the pressurization device 30 is a small compressor or an air pump pressurization device. And the power of the small compressor or the air pump supercharging equipment is far less than that of the compressor in the air conditioning system, so that the aims of saving energy and reducing consumption can be achieved. Of course, in other embodiments, the pressure increasing device 30 may be other types of pressure increasing devices, and is not limited herein.

Further, the directional 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 connection pipe 41 near the first end 112, the third pressure sensor 431 is disposed on the fourth connection pipe 43 near the second end 113, and the second pressure sensor 411 and the third pressure sensor 431 are respectively used for measuring pressure values of the first chamber 1115 and the second chamber 1116.

It should be noted that a pressure difference needs to be formed between the first chamber 1115 and the second chamber 1116 so as to drive the piston unit 12 to move under the action of the pressure. The second pressure sensor 411 is disposed on the second connection pipe 41 near the first end 112, and the third pressure sensor 431 is disposed on the fourth connection pipe 43 near the second end 113, so as to monitor the pressure value changes of the first chamber 1115 and the second chamber 1116 in real time, and if the first chamber 1115 and the second chamber 1116 cannot form a pressure difference, it needs to check whether the main valve chamber 111 leaks gas or the reversing valve 100 fails to normally reverse due to failure of the piston unit 12, so as to determine whether the reversing valve 100 is in a normal reversing state or fails.

As shown in fig. 2, the piston unit 12 is provided with a seal ring 121. The sealing ring 121 is arranged to ensure the tightness of the first chamber 1115 and the second chamber 1116, so that the high-low pressure difference which cannot be formed in the valve cavity due to the air leakage of the first chamber 1115 and the second chamber 1116 is prevented, and the four-way reversing valve 100 is prevented from being failed in reversing.

Preferably, the sealing ring 121 is an O-ring. Of course, in other embodiments, the sealing ring 121 may also be another type of sealing structure, and is not limited herein.

As shown in fig. 3 and 4, an embodiment of the present invention further provides an air conditioning system 101, which includes a compressor 50 and a reversing valve 100, wherein the compressor 50 is connected to the reversing valve 100.

Specifically, the air conditioning system 101 further includes a fifth connection pipe 44. The fifth connection pipe 44 is connected between the third port 1113 and the first port 1111, and the third port 1113 and the first port 1111 are connected to each other through the fifth connection pipe 44. The compressor 50 is disposed on the fifth connection 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.

In one embodiment, the first connection pipe 40 is connected to the first connection port 2111 at one end and connected to an inlet pipe of the compressor 50 at the other end. Since the third communication port 1113 communicates with the inlet line of the compressor 50, it is also possible to communicate the first connection pipe 40 with the inlet line of the compressor 50 and to communicate the first connection pipe 40 with the third communication port 1113 through the third connection pipe 42.

Further, the air conditioning system 101 further includes an outdoor unit 60, an indoor unit 70, and a throttling element 80 disposed between the indoor unit 70 and the outdoor unit 60. The outlet port of the outdoor unit 60 is connected to the inlet port of the throttling element 80, and the inlet port of the outdoor unit 60 is connected to the fourth flow 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 port 1112.

As shown in fig. 3, when the air conditioning system 101 performs cooling operation, the solenoid is de-energized, the spring pushes the pilot spool to slide leftward, the first communication port 2111 and the fourth communication port 2114 are communicated with each other, the pressure boosting device 30 flows high-pressure fluid from the outlet end from the first communication port 2111 to the fourth communication port 1114, and the high-pressure fluid flows from the fourth communication port 1114 to the second chamber 1116 through the fourth communication pipe 43 to form a high-pressure region; since the third communication port 1113 is connected to the inlet end of the compressor 50, the low-pressure fluid is caused to flow into the third communication port 2113 through the third connection pipe 42, and since the third communication port 2113 and the second communication port 2112 are communicated, the low-pressure fluid is caused to flow into the first chamber 1115 through the second connection pipe 41 to form a low-pressure region; at this time, the piston unit 12 moves toward the first end 112 under the action of the pressure difference, the first fluid port 1111 communicates with the fourth fluid port 1114, and the first fluid port 1111 is connected to the outlet end of the compressor 50, so that the high-pressure fluid flows from the fourth fluid port 1114 into the outdoor unit 60 (serving as a condenser) to dissipate heat to the outside, then flows into the indoor unit 70 (serving as an evaporator) through a capillary tube, then flows into the second fluid port 1112 through the indoor unit 70, and finally returns to the compressor 50 through the third fluid port 1113 because the second fluid port 1112 communicates with the third fluid port 1113, thereby completing the entire refrigeration cycle.

As shown in fig. 4, when the air-conditioning system 101 is operated to generate heat, the solenoid is energized, and the pilot spool is pushed by the electromagnetic force to slide rightward, and at this time, the first communication port 2111 and the second communication port 2112 communicate with each other, the pressure boosting device 30 flows high-pressure fluid from the outlet end from the first communication port 2111 to the second communication port 1112, and the high-pressure fluid flows from the second communication port 1112 into the first chamber 1115 through the second connection pipe 41 to form a high-pressure region; 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 connection pipe 42, and since the third communication port 2113 and the fourth communication port 2114 are communicated, the low-pressure fluid flows into the second chamber 1116 through the fourth connection pipe 43 to form a low-pressure region; at this time, the piston unit 12 moves toward the second end 113 by the pressure difference, the first fluid port 1111 communicates with the second fluid port 1112, and the first fluid port 1111 is connected to the outlet end of the compressor 50, so that the high-pressure fluid flows from the first fluid port 1112 into the indoor unit 70 (serving as a condenser) to dissipate heat indoors, then flows into the outdoor unit 60 (serving as an evaporator) through a capillary tube, flows into the fourth fluid port 1114 through the outdoor unit 60, and finally returns to the compressor 50 through the third fluid port 1113 because the fourth fluid port 1114 communicates with the third fluid port 1113, thereby completing the entire heating cycle.

An embodiment of the utility model provides a switching-over valve 100, this switching-over valve 100 is through setting up supercharging device 30 between main valve 10 and pilot valve 20, compare and utilize unit self pressure differential switching-over in the traditional switching-over valve, the switching-over of switching-over valve 100 is realized to the high-low pressure differential that the main valve 10 was played in the more convenient establishment that can be faster in this application, so just so reduced the energy consumption, but also can realize the switching-over at any time according to actual switching-over demand, the work efficiency of switching-over valve 100 has been improved, the energy waste has been avoided.

As shown in fig. 5 to 6, fig. 5 is a schematic structural view when the direction change valve 100 is a high capacity four-way valve, and fig. 6 is a schematic connection view of the high capacity four-way valve in fig. 5 in the air conditioning system 101.

It is worth noting that when the reversing valve 100 is a high-capacity four-way valve, the pressurizing device 30 is communicated between the first flow port 1111 and the first communication port 2111, and the scheme can quickly and conveniently establish high-low pressure difference in the main valve 10 to realize reversing of the reversing valve 100, so that energy consumption is reduced, and reversing can be realized at any time according to actual reversing requirements, so that the working efficiency of the reversing valve 100 is improved, and energy waste is avoided.

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

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

Claims

1. A reversing valve comprises a main valve (10) and a pilot valve (20) which are communicated with each other, wherein the pilot valve (20) drives the main valve (10) to realize the reversing of the reversing valve;

characterized in that the directional valve further comprises a pressure boosting device (30) connected between the main valve (10) and the pilot valve (20), and the pressure boosting device (30) is communicated with the main valve (10) and the pilot valve (20) respectively; the pressurization device (30) is capable of pressurizing the pilot valve (20) to provide a pressure differential that reverses the main valve (10).

2. The reversing valve according to claim 1, wherein the main valve (10) comprises a main valve body (11), the main valve body (11) has a main valve cavity (111) therein, and the main valve body (11) is provided with a third flow port (1113) communicated with the main valve cavity (111);

the pilot valve (20) comprises a pilot valve body (21), a pilot valve cavity (211) is arranged in the pilot valve body (21), and a first communication port (2111) communicated with the pilot valve cavity (211) is formed in the pilot valve body (21);

a first connecting pipe (40) is connected between the first connecting port (2111) and the third connecting port (1113), and the first connecting port (2111) and the third connecting 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 pressure boosting device (30) is respectively communicated with the main valve cavity (111) and the valve guide cavity (211) through the first connecting pipe (40).

3. The reversing valve according to claim 1, characterized in that the main valve (10) comprises a main valve body (11), the main valve body (11) has a main valve cavity (111) therein, the main valve body (11) is provided with a first flow port (1111) communicated with the main valve cavity (111);

a first connection pipe (40) is connected between the first communication port (2111) and the first circulation port (1111), and the first communication port (2111) and the first circulation port (1111) are communicated with each other through the first connection pipe (40);

4. The reversing valve according to claim 2, wherein the main valve body (11) is further provided with a second flow port (1112) and a fourth flow port (1114) which are respectively communicated with the main valve cavity (111);

the valve guide body (21) is also provided with a second communication port (2112), a third communication port (2113) and a fourth communication port (2114) which are respectively communicated with the valve guide cavity (211);

a third connecting pipe (42) is connected between the third communication port (2113) and the third communication port (1113), and the main valve chamber (111) and the valve guide chamber (211) are communicated with each other;

one end of the first connection pipe (40) is connected to the first connection port (2111), and the other end is connected to the third connection pipe (42).

5. The reversing valve according to claim 2, characterized in that the main valve body (11) is provided with a first through hole (1111) which is communicated with the main valve cavity (111); the third circulation port (1113) is communicated with the first circulation port (1111) through a compressor (50) in an air conditioning system, the third circulation port (1113) is connected to an inlet pipeline of the compressor (50), and the first circulation port (1111) is connected to an outlet pipeline of the compressor (50);

the first connection pipe (40) has one end connected to the first communication port (2111) and the other end connected to an inlet pipe of the compressor (50).

6. The reversing valve according to claim 4, wherein the main valve body (11) comprises a first end portion (112) and a second end portion (113) which are located at two opposite ends of the main valve body (11) and respectively communicate with the main valve cavity (111), a second connecting pipe (41) is connected between the main valve body (11) and the valve guide body (21), one end of the second connecting pipe (41) is connected to the second communication port (2112), and the other end of the second connecting pipe communicates with the main valve cavity (111) through the first end portion (112) and enables the main valve cavity (111) and the valve guide cavity (211) to communicate with each other;

a fourth connecting pipe (43) is further connected between the main valve body (11) and the valve guide body (21), one end of the fourth connecting pipe (43) is connected to the fourth communication port (2114), and the other end of the fourth connecting pipe is communicated with the main valve cavity (111) through the second end (113) to enable the main valve cavity (111) and the valve guide cavity (211) to be communicated with each other;

the reversing valve further comprises a second pressure sensor (411) and a third pressure sensor (431), the second pressure sensor (411) is arranged at a position, close to the first end portion (112) relatively, on the second connecting pipe (41), the third pressure sensor (431) is arranged at a position, close to the second end portion (113) relatively, on the fourth connecting pipe (43), and the second pressure sensor (411) and the third pressure sensor (431) are respectively used for measuring pressure values at two ends of the main valve cavity (111).

7. A reversing valve according to claim 2 or 3, characterized in that a control device (31) is arranged on the pressure boosting device (30), which control device (31) is capable of controlling the start/stop of the pressure boosting device (30).

8. A reversing valve according to claim 7, characterized in that the control device (31) comprises a first pressure sensor (311) arranged on the first connecting pipe (40), which first pressure sensor (311) is arranged between the first communication port (2111) and the pressure boosting device (30) for controlling the start/stop of the pressure boosting device (30).

9. The reversing valve according to claim 7, characterized in that the control device (31) comprises a control provided on the pressure boosting device (30), which control controls the start/stop of the pressure boosting device (30) by controlling the working time of the pressure boosting device (30).

10. Reversing valve according to claim 1, characterized in that the pressure boosting device (30) is a small compressor or an air pump pressure boosting device.

11. An air conditioning system, characterized in that it comprises a compressor (50) and a reversing valve according to any one of claims 1-10, said compressor (50) being connected to said reversing valve.