CN212774899U

CN212774899U - Gas bearing gas supply system for gas suspension compressor and refrigeration system

Info

Publication number: CN212774899U
Application number: CN202021403915.4U
Authority: CN
Inventors: 韩聪; 朱万朋; 刘增岳; 李思茹; 殷纪强; 俞国新; 刘洋
Original assignee: Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2021-03-23
Anticipated expiration: 2030-07-15

Abstract

The application relates to the technical field of refrigeration, discloses a gas bearing gas supply system for gas suspension compressor, includes: a gas supply tank having a refrigerant inlet and a gas port provided thereon; the refrigerant inlet is connected with refrigerant; one end of the first air supply pipeline is communicated with an air port on the air supply tank, and the other end of the first air supply pipeline is communicated with an air supply port of the air suspension compressor; one end of the second air supply pipeline is communicated with an air outlet of the air suspension compressor, and the other end of the second air supply pipeline is communicated with an air supply port of the air suspension compressor; and switching of the air supply pipeline is completed through switching of the first air supply pipeline and the second air supply pipeline. This disclosed embodiment combines two kinds of air feed modes of air feed tank air feed and air feed of air suspension compressor self, through the switching of first air supply line and second air supply line, avoids always being supplied air by the air feed tank to the gas bearing of air suspension compressor, reduces the energy loss that the air feed tank brought, avoids the energy waste. The present application further discloses a refrigeration system.

Description

Gas bearing gas supply system for gas suspension compressor and refrigeration system

Technical Field

The application relates to the technical field of refrigeration, for example, relates to a gas bearing gas supply system for a gas suspension compressor and a refrigeration system.

Background

The gas suspension compressor becomes one of the mainstream directions of the current centrifugal compressor development by virtue of the characteristics of high efficiency, energy conservation, no oil and the like, and the gas supply for the gas bearing is a key part for ensuring the normal operation of the gas suspension compressor. At present, gas bearing gas supply system mostly is the external gas supply jar of compressor and realizes: refrigerant in a refrigeration system (such as a condenser) is pumped to an air supply tank through a refrigerant pump, then is heated through a heater, is gasified and generates stable pressure, and is communicated to a gas bearing of a compressor through a pipeline to realize bearing air supply.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art: when the gas supply tank is used for supplying gas to the gas bearing of the gas suspension compressor, the gas supply tank needs to be operated all the time to ensure the operation of the gas suspension compressor, so that the energy consumption is high, and the energy waste is caused.

SUMMERY OF THE UTILITY MODEL

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a gas bearing gas supply system and a refrigerating system for a gas suspension compressor, and aims to solve the problems that when a gas supply tank is adopted to supply gas to a gas bearing of the gas suspension compressor, the gas supply tank needs to be operated all the time to ensure the operation of the gas suspension compressor, the energy consumption is high, and the energy is wasted.

In some embodiments, the gas bearing gas supply system for a gas suspension compressor comprises:

a gas supply tank having a refrigerant inlet and a gas port provided thereon; the refrigerant inlet is connected with a refrigerant in a refrigeration system where the gas suspension compressor is located;

one end of the first air supply pipeline is communicated with an air port on the air supply tank, and the other end of the first air supply pipeline is communicated with an air supply port of the air suspension compressor;

one end of the second air supply pipeline is communicated with an air outlet of the air suspension compressor, and the other end of the second air supply pipeline is communicated with an air supply port of the air suspension compressor;

and switching the gas supply pipeline of the gas bearing of the gas suspension compressor is completed by switching on the first gas supply pipeline and switching off the second gas supply pipeline or switching off the first gas supply pipeline and switching on the second gas supply pipeline.

In some embodiments, the refrigeration system comprises the gas bearing gas supply system described above.

The gas bearing gas supply system and the refrigeration system for the gas suspension compressor provided by the embodiment of the disclosure can realize the following technical effects:

in the gas bearing gas supply system of the embodiment of the present disclosure, two gas supply modes of gas supply to the gas supply tank and gas supply to the gas suspension compressor are combined, and the gas bearing gas supply to the gas suspension compressor by the gas supply tank is avoided by switching the first gas supply pipeline and the second gas supply pipeline, so that the energy loss caused by the gas supply tank is reduced, and the energy waste is avoided.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

FIG. 1 is a schematic structural diagram of a gas bearing gas supply system for a gas suspension compressor according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of another gas bearing gas supply system for a gas suspension compressor provided in an embodiment of the present disclosure;

fig. 3 is a schematic cross-sectional structural diagram of a self-operated three-way valve according to an embodiment of the disclosure;

FIG. 4 is a cross-sectional view of a self-operated three-way valve shown in FIG. 3 along the direction A-A;

fig. 5 is a schematic structural diagram of a valve element of a self-operated three-way valve provided in the embodiment of the present disclosure;

FIG. 6 is a schematic cross-sectional view of another self-operated three-way valve according to an embodiment of the disclosure;

FIG. 7 is a cross-sectional view of another self-operated three-way valve shown in FIG. 6 along the direction B-B;

fig. 8 is a schematic structural diagram of a valve element of another self-operated three-way valve provided in the embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of a valve element of another self-operated three-way valve provided in the embodiment of the present disclosure;

FIG. 10 is a cross-sectional view of another self-operated three-way valve shown in FIG. 6 along the direction B-B;

reference numerals:

11. an air supply tank; 111. a refrigerant inlet; 112. a gas port; 113. a heating device; 114. a liquid level meter; 115. a safety valve; 12. a first air supply line; 121. a first control valve; 122. a first pressure sensor; 123. a first pipeline; 124. a third pipeline; 13. a second gas supply line; 131. a second control valve; 132. a second pressure sensor; 133. a second pipeline; 14. a first controller; 15. a second controller; 16. a fourth pipeline; 161. a pump; 162. a filtration device; 163. a one-way valve; 20. a self-operated three-way valve; 21. a valve body; 2100. a valve cavity; 2101. a first port; 2102. a second port; 2103. a third port; 2104. an inner peripheral wall; 211. a three-way housing; 2111. a first channel; 2112. a second channel; 2113. a third channel; 212. a first end; 213. a second end; 214. a positioning groove structure; 215. a signal sensing body; 22. a valve core; 221. a support; 2211. an annular support portion; 2212. a support beam; 222. a thrust plate; 223. sealing the end head; 2231. an air intake portion; 2232. a sealing part; 2233. an air inlet; 224. positioning the protruding structure; 225. a signal generator; 31. a gas suspension compressor; 311. an air supply port; 312. an exhaust port; 32. a condenser; 33. a throttling device; 34. an evaporator.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the disclosed embodiments and their examples and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation. Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In addition, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. Specific meanings of the above terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art according to specific situations.

The term "plurality" means two or more unless otherwise specified.

In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

Referring to fig. 1, an embodiment of the present disclosure provides a gas bearing gas supply system for an air suspension compressor, which includes a gas supply tank 11, a first gas supply line 12 and a second gas supply line 13. Gas supply tank 11 is provided with refrigerant inlet 111 and gas port 112; the refrigerant inlet 111 receives refrigerant in the refrigeration system in which the air-bearing compressor 31 is located. One end of the first air supply line 12 communicates with the air port 112 of the air supply tank 11, and the other end communicates with the air supply port 311 of the aero-levitation compressor 31. One end of the second air supply line 13 communicates with an air outlet 312 of the aero-levitation compressor 31, and the other end communicates with an air inlet 311 of the aero-levitation compressor 31. Switching of the gas supply line of the gas bearing of the gas suspension compressor 31 is accomplished by switching the first gas supply line 12 on and off the second gas supply line 13, or switching the first gas supply line 12 off and on the second gas supply line 13.

In the gas bearing gas supply system according to the embodiment of the present disclosure, two gas supply modes, i.e., gas supply from the gas supply tank 11 and gas supply from the gas suspension compressor 31 themselves, are combined, and the gas bearing of the gas suspension compressor 31 is prevented from being supplied with gas from the gas supply tank 11 all the time by switching the first gas supply line 12 and the second gas supply line 13, so that energy loss caused by the gas supply tank 11 is reduced, and energy waste is avoided.

In some embodiments, the gas bearing gas supply system further comprises a first controller 14; the output end of the first controller 14 is connected to the control end of the heating device 113 in the air supply tank 11 and the control end of the air suspension compressor 31. When the first controller 14 receives a start signal of the air suspension compressor 31, the heating device 113 is controlled to be started and the first air supply pipeline 12 is conducted; and controls to start the air suspension compressor 31 when the air supply pressure of the air supply tank 11 reaches a first set value; when the discharge pressure of the gas suspension compressor 31 (i.e., the gas pressure at the discharge port 312) reaches or exceeds the first set value, the first controller 14 controls to turn on the second gas supply line 13 and to turn off the first gas supply line 12. In the embodiment of the present disclosure, the gas supply pressure of the gas supply tank 11 may be determined by the gas pressure in the gas supply tank 11 or the gas pressure in the pipeline at the gas port 112 of the gas supply tank 11, and therefore, the gas outlet pressure of the gas supply tank 11 may be monitored by a pressure sensor provided in the gas supply tank 11 or on the pipeline at the gas port 112 thereof. The first set point is determined in accordance with the required supply pressure of the air suspension compressor 31.

Optionally, the gas bearing gas supply system further comprises a first control valve 121, a second control valve 131, a first pressure sensor 122 and a second pressure sensor 132; the first control valve 121 is disposed in the first air supply line 12, and a control end of the first control valve 121 is connected to an output end of the first controller 14; the second control valve 131 is disposed in the second air supply line 13, and a control end of the second control valve 131 is connected to an output end of the first controller 14; the second control valve 131 is disposed in the second air supply line 13, and a control end of the second control valve 131 is connected to an output end of the first controller 14; the sensing end of the first pressure sensor 122 is arranged in the gas supply tank 11 or on a pipeline at the gas port 112 of the gas supply tank 11, and the output end is connected with the input end of the first controller 14; the sensing end of the second pressure sensor 132 is disposed on the pipeline at the exhaust port 312 of the air suspension compressor 31, and the output end is connected to the input end of the first controller 14.

In the embodiment of the present disclosure, when the first controller 14 receives the start signal of the air suspension compressor 31, the first controller controls to start the heating device 113 and open the first control valve 121, so as to conduct the first air supply line 12. The first controller 14 receives the pressure value of the first pressure sensor 122 (i.e., the supply pressure of the gas supply tank 11), and when the supply pressure of the gas supply tank 11 reaches a first set value, the first controller 14 controls to start the aero-levitation compressor 31. The first controller 14 receives the pressure value of the second pressure sensor 132 (i.e. the discharge pressure of the discharge port 312 of the air suspension compressor 31), and when the discharge pressure of the air suspension compressor 31 reaches or exceeds a first set value, the first controller 14 controls to open the second control valve 131, open the second air supply line 13, close the first control valve 121, and shut off the first air supply line 12.

In some embodiments, the first controller 14 controls the heating device 113 to be activated when the supply air pressure of the supply air tank 11 is lower than a first set value during the period when the second supply air line 13 is turned on. While being supplied by the second air supply line 13, the air supply pressure in the air supply tank 11 of the first air supply line 12 is ensured to be kept near the first set value, i.e., within the lower limit range of the air supply pressure. It is ensured that the gas supply tank 11 can supply gas with a pressure not lower than the first set value to the gas suspension compressor 31 at any time.

In the embodiment of the present disclosure, when the air suspension compressor 31 is stopped, since the discharge amount and the discharge pressure at the discharge port 312 are both reduced, when the discharge pressure is lower than the first set value, the first controller 14 controls the second air supply line 13 to be cut off, and the first air supply line 12 is conducted. Until the air suspension compressor 31 stops rotating, the first air supply pipeline 12 is controlled to be cut off, and air supply is stopped.

In some embodiments, when the pressure value of the second pressure sensor 132 received by the first controller 14 is lower than the first set value, the second control valve 131 is controlled to be closed, and the first control valve 121 is controlled to be opened. After the set time, the first control valve 121 is controlled to be closed. The specific value of the set time is related to the time required for the air suspension compressor 31 to stop rotating from the stop, and the specific value of the set time can be set according to actual conditions.

Referring to fig. 2 to 10, an embodiment of the present disclosure provides another gas bearing gas supply system for a gas suspension compressor, which includes a gas supply tank 11, a first gas supply line 12, a second gas supply line 13, and a self-operated three-way valve 20. Gas supply tank 11 is provided with refrigerant inlet 111 and gas port 112; the refrigerant inlet 111 receives refrigerant in the refrigeration system in which the air-bearing compressor 31 is located. One end of the first air supply line 12 communicates with the air port 112 of the air supply tank 11, and the other end communicates with the air supply port 311 of the aero-levitation compressor 31. One end of the second air supply line 13 communicates with an air outlet 312 of the aero-levitation compressor 31, and the other end communicates with an air inlet 311 of the aero-levitation compressor 31. The self-operated three-way valve 20 includes a first port 2101, a second port 2102, and a third port 2103; the first port 2101 and the third port 2103 are connected to a first gas supply pipe 12, and when the first port 2101 and the third port 2103 are communicated, the first gas supply pipe 12 is communicated; the second port 2102 and the third port 2103 are connected to the second air supply line 13, and when the second port 2102 and the third port 2103 are connected, the second air supply line 13 is connected. Switching of the gas supply line of the gas bearing of the gas suspension compressor 31 is accomplished by switching the first gas supply line 12 on and off the second gas supply line 13, or switching the first gas supply line 12 off and on the second gas supply line 13.

In the gas bearing gas supply system according to the embodiment of the present disclosure, a self-operated three-way valve 20 is added to complete the switching between the two gas supply modes of the first gas supply line 12 and the second gas supply line 13, so that the gas bearing of the gas suspension compressor 31 is prevented from being supplied with gas by the gas supply tank 11 all the time, the energy loss caused by the gas supply tank 11 is reduced, and the energy waste is avoided. The self-operated three-way valve 20 can automatically switch the conducting path by using the fluid pressure, so that a first control valve 121 for realizing the conduction and the cut-off of the first air supply pipeline 12, a second control valve 131 for realizing the conduction and the cut-off of the second air supply pipeline 13 and the like are omitted, the use of components is reduced, and the cost is saved. The energy-saving gas supply system can realize stable gas supply switching at the same time. And the self-operated three-way valve 20 is convenient to install and has small requirement on space.

In some embodiments, the gas bearing gas supply system further comprises a second controller 15. The output end of the second controller 15 is respectively connected with the control end of the heating device 113 in the air supply tank 11 and the control end of the air suspension compressor 31; when the second controller 15 receives a start signal of the air suspension compressor 31, the heating device 113 is controlled to be started; and controls to start the air suspension compressor 31 when the air outlet pressure of the air supply tank 11 reaches a first set value; when the second controller 15 determines that the second port 2102 of the self-operated three-way valve 20 communicates with the third port 2103, it controls to stop the heating device 113. In the air supply system according to the embodiment of the present disclosure, the amount of use of components is reduced, and therefore, compared to the first controller 14, the number of interfaces of the signal output interface and the signal input interface required on the second controller 15 is reduced, the connection reliability is increased, and the influence caused by a component failure is reduced. In the embodiment of the present disclosure, the outlet pressure of the gas supply tank 11 can be obtained by monitoring a pressure sensor (similar to the first pressure sensor 122) disposed in the gas supply tank 11 or on a pipeline at the gas port 112 thereof. Here, the first set value is determined according to the required air supply pressure of the air suspension compressor 31, as well as the first set value described above.

In the disclosed embodiment, the first air supply line 12 and the second air supply line 13 between the third port 2103 of the self-operated three-way valve 20 and the air supply port 311 of the air suspension compressor 31 may be combined into one line, such as the third line 124 shown in fig. 2; a pipe between the first port 2101 of the self-operated three-way valve 20 and the gas port 112 of the gas supply tank 11 is defined as a first pipe 123, a pipe between the second port 2102 of the self-operated three-way valve 20 and the gas discharge port 312 of the aerosol compressor 31 is defined as a second pipe 133, the first pipe 123 and the third pipe 124 are communicated to form a first gas supply pipe 12, and the second pipe 133 and the third pipe 124 are communicated to form a second gas supply pipe 13.

In the embodiment of the present disclosure, the manner in which the second controller 15 determines that the second port 2102 and the third port 2103 of the self-operated three-way valve 20 communicate with each other is not limited, and may be determined by setting a sensor in the self-operated three-way valve 20 and detecting position information of the valve element 22. Alternatively, the discharge pressure of the air suspension compressor 31 (obtained by the aforementioned second pressure sensor 132) may be detected, and when the discharge pressure reaches a set value (which should be greater than the first set value), it is determined that the second port 2102 of the self-operated three-way valve 20 is communicated with the third port 2103.

In some embodiments, the self-operated three-way valve 20 is provided with a sensor capable of detecting the position of the valve element 22, and the output end of the sensor is connected with the input end of the second controller 15; the sensor can detect a first position signal and a second position signal of the valve element 22, wherein the first position signal is that the first port 2101 is communicated with the third port 2103, and the second port 2102 is cut off from the third port 2103; the second position signal is a signal in which the second port 2102 and the third port 2103 are connected, and the first port 2101 and the third port 2103 are disconnected. When the second controller 15 receives the second position signal, it determines that the second port 2102 of the self-operated three-way valve 20 is communicated with the third port 2103, and controls to stop the heating device 113.

In the embodiment of the present disclosure, the self-operated three-way valve 20 realizes the communication between the first port 2101 and the third port 2103 or the communication between the second port 2102 and the third port 2103 by the difference in gas pressure of the gas respectively input from the first port 2101 and the second port 2102. Specifically, the first port 2101 is a low-pressure gas inlet, which is connected to gas output by the gas supply pipe; the second port 2102 is a high pressure gas inlet that receives high pressure gas discharged from the gas discharge port 312 of the gas suspension compressor 31. The gas is supplied through the gas supply pipe at the initial starting stage of the gas suspension compressor 31, and the first port 2101 is communicated with the third port 2103; after the operation of the air suspension compressor 31 is stable, the valve core 22 in the self-operated three-way valve 20 is moved to block the communication channel between the first port 2101 and the third port 2103 by the pressure applied by the high-pressure gas at the exhaust port 312, and the communication channel between the second port 2102 and the third port 2103 is opened, so that the switching between the first air supply pipeline 12 and the second air supply pipeline 13 is automatically completed.

In some embodiments, the second controller 15 controls the activation of the heating device 113 when the supply air pressure of the supply air tank 11 is lower than a first set value during the period when the second supply air line 13 is turned on. While being supplied by the second air supply line 13, the air supply pressure in the air supply tank 11 of the first air supply line 12 is ensured to be kept near the first set value, i.e., within the lower limit range of the air supply pressure. It is ensured that the gas is supplied to the gas suspension compressor 31 at a pressure not lower than the first set value.

In the embodiment of the present disclosure, when the air suspension compressor 31 is stopped, since the air displacement and the air displacement at the air outlet 312 are both reduced, when the air displacement of the air suspension compressor 31 is lower than the first set value, the air supply is automatically switched to the first air supply line 12 until the air suspension compressor 31 stops rotating, and the air supply tank 11 is controlled to stop supplying air, for example, the air supply is stopped when the heating is stopped.

Alternatively, when the aero-levitation compressor 31 is stopped, the second controller 15 determines that the second port 2102 and the third port 2103 of the self-operated three-way valve 20 are communicated, and controls to stop the air supply to the air supply tank 11, for example, stop the heating device 113, for a set time. The specific value of the set time is related to the time required for the air suspension compressor 31 to stop rotating from the stop, and the specific value of the set time can be set according to actual conditions.

In the embodiment of the present disclosure, the first controller 14 and the second controller 15 may both adopt PLC editable controllers, and the air supply logic of the air supply system of the embodiment of the present disclosure may be completed through simple logic programming. The first control valve 121 and the second control valve 131 may be valve structures such as solenoid valves or electronic expansion valves, but are not limited thereto, and may be automatically controlled. The first pressure sensor 122 and the second pressure sensor 132 may be conventional sensors, but are not limited thereto.

In the air supply system according to the embodiment of the present disclosure, the source of the refrigerant in the air supply tank 11 may be from the refrigeration system in which the air suspension compressor 31 is located. In some embodiments, the refrigerant inlet 111 of the gas supply tank 11 is connected to the refrigerant in the condenser 32 of the refrigeration system in which the gas suspension compressor 31 is located. Optionally, the air supply system further comprises a fourth pipeline 16, and two ports of the fourth pipeline 16 are respectively communicated with the refrigerant inlet 111 of the air supply tank 11 and the condenser 32 in the refrigeration system where the air suspension compressor 31 is located. The location on the condenser 32 in communication with the fourth conduit 16 is at the bottom of the condenser 32, as shown in fig. 1 and 2.

Optionally, the air supply system further comprises a pump 161 and a filter 162, wherein the pump 161 is connected to the fourth pipeline 16 to power the fourth pipeline 16. The filter device 162 is provided in the fourth pipe line 16 between the condenser 32 and the pump 161, and filters the refrigerant in the fourth pipe line 16. In this embodiment, the pump 161 may be a liquid supply pump or an air supply pump, but is not limited to this, and may meet the requirement of pumping liquid refrigerant. The filtering device 162 may be a conventional filter, and may filter out impurities in the liquid refrigerant.

Optionally, the gas supply system further comprises a one-way valve 163 disposed on the fourth line 16. Ensuring no counter flow. Optionally, a check valve 163 is provided on the fourth line 16 between the pump 161 and the supply tank 11.

In the air supply system according to the embodiment of the present disclosure, the air supply tank 11 is further provided with components such as a liquid level meter 114 and a safety valve 115 to assist the air supply stability of the air supply tank 11.

In the embodiment of the present disclosure, the structure of the self-operated three-way valve 20 is not limited, and the self-operated three-way valve 20 having a conventional structure may be used. Of course, a self-operated three-way valve 20 is also provided in the embodiment of the present disclosure, so as to be more suitable for the air supply system in the embodiment of the present disclosure.

Referring to fig. 3 to 10, a self-operated three-way valve 20 according to an embodiment of the present disclosure will be described. The self-operated three-way valve 20 comprises a valve body 21 and a valve core 22, wherein the valve body 21 is provided with a first port 2101, a second port 2102 and a third port 2103; the first port 2101 is disposed opposite the second port 2102, and a valve cavity 2100 is formed between the first port 2101 and the second port 2102; the third port 2103 is disposed on a sidewall of the valve chamber 2100. The valve core 22 comprises a bracket 221 and a thrust plate 222, wherein the bracket 221 is matched with the valve cavity 2100 and movably arranged in the valve cavity 2100, and the thrust plate 222 is arranged on the bracket 221 and matched with the section of the valve cavity 2100; the thrust plate 222 drives the valve element 22 to move in the valve cavity 2100 under the pushing action of the fluid, so as to block the second port 2102 and conduct the first port 2101 and the third port 2103, or block the first port 2101 and conduct the second port 2102 and the third port 2103.

In the self-operated three-way valve 20 of the embodiment of the present disclosure, the thrust plate 222 on the valve core 22 receives the thrust of the fluid to drive the valve core 22 to move in the valve cavity 2100; when the first fluid pressure flowing into the first port 2101 is higher than the second fluid pressure flowing into the second port 2102, the valve core 22 moves towards the second port 2102, the thrust plate 222 moves into the valve cavity 2100 between the second port 2102 and the third port 2103, the second port 2102 is blocked, the valve cavity 2100 between the first port 2101 and the third port 2103 is made free, and the first port 2101 and the third port 2103 are conducted; when the first fluid pressure is lower than the second fluid pressure, the valve core 22 moves towards the first port 2101, the thrust plate 222 moves into the valve cavity 2100 between the first port 2101 and the third port 2103 to block the first port 2101, so that the valve cavity 2100 between the second port 2102 and the third port 2103 is made available, and the second port 2102 and the third port 2103 are conducted; and automatic switching is realized according to the fluid pressure of the fluid at the two ends.

The self-operated three-way valve 20 of the embodiment of the disclosure has the advantages of simple structure, economy, reliability and convenience in installation. The gas bearing gas supply device is suitable for a refrigerating system and can also be applied to a gas bearing gas supply system of a gas suspension compressor, and is used as a pattern cutting device between different gas supply pipelines, for example, a switching device between the first gas supply pipeline 12 and the second gas supply pipeline 13. The switching can be realized by utilizing the self pressure of the fluid without energy consumption. The energy conservation of the air supply system is realized, and stable air supply switching can be realized while the energy efficiency of the whole machine is improved.

In some embodiments, as shown in fig. 4, the valve core 22 further includes sealing heads 223, and the sealing heads 223 are respectively disposed at two ends of the bracket 221. Sealing tip 223 includes an air inlet portion 2231 and a sealing portion 2232; the air inlet portion 2231 is located at the periphery of the sealing portion 2232 and is provided with an air inlet hole 2233; the seal 2232 fits into the first port 2101 or the second port 2102 of the valve body 21. The addition of the seal head 223 to block the first port 2101 or the second port 2102 on the corresponding side reduces the sealing requirements between the thrust plate 222 and the inner wall of the valve chamber 2100.

In the embodiment disclosed in the present disclosure, when the outer end surface of the seal head 223 of the valve core 22 contacts the inner circumferential wall 2104 of the first port 2101 or the second port 2102, the corresponding first port 2101 or the second port 2102 is blocked, and therefore, the outer end surface of the seal head 223 is adapted to the shape of the inner circumferential wall 2104 of the first port 2101 or the second port 2102, so as to achieve better sealing.

In the embodiment of the present disclosure, the number and the shape of the air inlet holes 2233 provided in the air inlet 2231 are not limited, and may be determined according to actual conditions.

In some embodiments, as shown in conjunction with fig. 6-8, the outboard end face of the sealing tip 223 includes a bulbous portion; the inner peripheral walls 2104 of the first port 2101 and the second port 2102 of the valve body 21 fit with the spherical portion of the sealing head 223. The spherical surface part has better sealing effect, and the spherical surface has certain buffering effect, can be switched more smoothly, and does not have jamming. All or part of the spherical portion may be used as the sealing portion 2232 of the sealing tip 223.

In the embodiment of the present disclosure, the spherical portion may be a spherical protrusion structure only disposed on the outer end surface of the sealing end 223, or may be designed to be spherical as a whole.

In some embodiments, as shown in fig. 6-8, sealing tip 223, comprises a hemispherical shell. The center portion of the hemispherical case serves as a seal portion 2232, and the outer ring portion serves as an air intake portion 2231; the central portion fits into the first port 2101 or the second port 2102 of the valve body 21; an air inlet 2233 is arranged on the outer ring part; also, the inner peripheral walls 2104 of the first port 2101 and the second port 2102 of the valve body 21 fit with the spherical surface of the hemispherical housing of the sealing head 223.

In the embodiment of the present disclosure, the air inlet holes 2233 are distributed on a circumference of the hemispherical shell. As shown in fig. 8 and 9, the number of the air intake holes 2233 is 4. The shape of the air inlet holes 2233 is not limited, and may be a circular hole, a square hole, a long-strip-shaped hole, an arc-shaped hole, or the like.

In some embodiments, the thickness of the thrust plate 222 is less than the inner diameter of the third port 2103 of the valve body 21 (e.g., the inner diameter of the third passage 2103 of the three-way housing 211 described below). Thus, when the thrust plate 222 passes through the third port 2103 during movement, the third port 2103 is not blocked, and instantaneous gas cut-off occurs during switching. And the connection transition is realized during switching, and the switching stability is ensured. When applied to the gas bearing gas supply system of the gas suspension compressor 31, the gas supply stability is ensured.

In some embodiments, as shown in fig. 4 and 7, self-operated three-way valve 20 further includes a positioning protrusion structure 224 and a positioning groove structure 214. The positioning boss structure 224 is disposed on the spool 22; the detent structure 214 is disposed on an inner wall of the valve cavity 2100; when the valve core 22 is movably disposed in the valve cavity 2100, the positioning protrusion structure 224 is located in the positioning groove structure 214. The valve core 22 moves along the positioning groove structure 214 during the movement process, and the movement stability of the valve core 22 is ensured. The positioning groove structure 214 is disposed at a position that avoids the inner wall of the valve cavity 2100 where the third port 2103 is located.

Optionally, the number of the positioning protrusion structures 224 is one or more, and the number of the positioning groove structures 214 is also one or more.

Alternatively, as shown in fig. 5, the positioning protrusion 224 includes a positioning rib extending in the longitudinal direction and disposed on the valve core 22.

In some embodiments, as shown in fig. 4 and 5, and fig. 9 and 10, self-operated three-way valve 20 further includes a signal generator 225 and a signal sensor 215. The signal generator 225 is provided on the spool 22; the signal sensing body 215 is arranged on the valve body 21; signal sensing element 215 may sense the signal of signal generator 225 and learn the relative position of spool 22. The signal sensor 215 can feed back a signal indicating the relative position of the valve element 22, for example, to a controller, and the controller can determine a communication path in the self-operated three-way valve 20 according to the signal to perform the next control. For example, the second controller 15 connects the signal output terminal of the signal sensor 215 to the input terminal of the second controller 15; when the signal fed back by the signal sensing body 215 is that the valve core 22 is positioned at the first port 2101 side, it is determined that the second port 2102 of the self-operated three-way valve 20 is communicated with the third port 2103; otherwise, when the signal fed back by the signal sensing body 215 is that the spool 22 is located on the second port 2102 side, it is determined that the first port 2101 of the self-operated three-way valve 20 is communicated with the third port 2103.

In the embodiment of the present disclosure, the position of the signal generator 225 on the valve body 22 is not limited as long as the signal generator can sense the signal sensor 215 provided on the valve body 21.

Alternatively, when the self-operated three-way valve 20 includes the aforementioned positioning boss structure 224, the signal generator 225 is provided on the positioning boss structure 224.

In some embodiments, signal generating body 225 comprises a magnetic body and signal sensing body 215 comprises a magnetic force sensor. The magnetic sensor can sense the position of the magnetic body on the valve core 22 to obtain a relative position signal of the valve core 22 and feed back the relative position signal. Optionally, the magnetic body comprises a permanent magnet.

In the embodiment of the present disclosure, the specific structure of the bracket 221 of the self-operated three-way valve 20 is not limited, and the support thrust plate 222 may be provided to ensure the fluid passage.

In some embodiments, the support 221 of the poppet 22, including the annular support portion 2211 and the longitudinal support beam portion; the annular support 2211 is adapted to the cross section of the valve cavity 2100; the annular support portion 2211 is provided on the longitudinal support beam portion, and constitutes a main body of the stand 221; thrust plate 222 is disposed in the middle of the longitudinal support beam portion. In the embodiment of the present disclosure, the annular support portion 2211 and the longitudinal support beam portion of the bracket 221 may be integrally formed, or may be formed by connecting separate structural members. The support 221 is hollow to ensure the fluid to pass through.

In the embodiment of the present disclosure, the shape of the annular support 2211 is not limited, and may be adapted to the cross section of the valve cavity 2100. Alternatively, the annular support 2211 is an annular ring, and the valve cavity 2100 is cylindrical.

Alternatively, the number of the ring-shaped support 2211 is one or more. Without limitation, the stability of the bracket 221 may be ensured by determining parameters such as the longitudinal length of the spool 22. When the number of the ring-shaped support portions 2211 is plural, the plural ring-shaped support portions 2211 are provided in parallel to each other on the longitudinal support beam portion.

Alternatively, the number of the ring-shaped support portions 2211 is 2, and 2 ring-shaped support portions 2211 are respectively provided at the end portions of the longitudinal support beam portions.

In the embodiment of the present disclosure, the structural form of the longitudinal support beam portion is not limited, and the stability of the bracket 221 may be ensured. Optionally, the longitudinal support beam section comprises one or more support beams 2212. Alternatively, the number of support beams 2212 is 1, 2, or 3.

In some embodiments, the longitudinal support beam section comprises 2 support beams 2212. Alternatively, two support beams 2212 are oppositely arranged to form a longitudinal support beam portion.

In some embodiments, a stent i comprises 2 annular support portions 2211 and longitudinal support beam portions; the longitudinal support beam portion is formed by 2 support beams 2212 disposed opposite to each other, and 2 annular support portions are disposed at the end portions of the longitudinal support beam portion. Thrust plate 222 is disposed in the middle of the longitudinal support beam portion. The bracket 221 of the present embodiment may be integrally formed, or may be formed by connecting various structural members.

In the disclosed embodiment, when the valve core 22 includes the seal head 223, it is disposed at both ends of the bracket 221. Alternatively, in the case of the valve body 22, the seal heads 223 are provided at both ends of the longitudinal support beam portion on the basis of the above-described bracket i. The structure of the sealing tip 223 may refer to the related structural description of the sealing tip 223. As shown in fig. 8 and 9, the sealing tip 223 is a hemispherical shell, and a circular port of the hemispherical shell is fittingly connected to the annular support 2211 at the end of the bracket 221.

Alternatively, when the self-operated three-way valve 20 includes the positioning projection structure 224, the positioning projection structure 224 is provided to the longitudinal support beam portion.

Optionally, the positioning projection structure 224 is disposed on one or more of the support beams 2212.

Alternatively, as shown in fig. 5, 8 and 9, positioning ribs are provided on the two support beams 2212 of the bracket i extending in the longitudinal direction.

Alternatively, as shown in fig. 5 and 9, the signal generator 225 is disposed on one of the positioning boss structures 224. The signal sensing body 215 is disposed on the outer wall of the valve body 21 corresponding to the position of the signal generating body 225.

In the embodiment of the present disclosure, the valve core 22 may be integrally formed, or may be formed by connecting various structural members.

In some embodiments, the valve body 21 includes a three-way housing 211, a first end 212, and a second end 213. The three-way housing 211 includes a first passage 2111, a second passage 2112, and a third passage 2113; the first and

second passages

2111, 2112 coaxially form a valve chamber 2100; a first end 212 disposed at a port of the first channel 2111; a first port 2101 is arranged on the first end 212; the size of the first port 2101 is smaller than the cross-sectional size of the first channel 2111; the second tip 213 is disposed at a port of the second channel 2112; a second port 2102 is arranged on the second end head 213; the second port 2102 has a size that is smaller than a cross-sectional size of the second channel 2112. The port of the third passageway 2113 of the three-way housing 211 is the third port 2103. Simple structure and easy molding.

Alternatively, the first end 212 and the second end 213 may be understood as plugs, which are respectively sealed at the port of the first passage 2111 and the port of the second passage 2112, and are provided with through holes, which are used as the first port 2101 and the second port 2102 of the valve body 21.

In some embodiments, when the valve core 22 includes the seal head 223, the inner end surface of the first head 212 is formed with a fitting structure that is adapted to the shape of the outer end surface of the seal head 223; the inner end surface of the second end head 213 is formed with an adapting structure adapted to the shape of the outer end surface of the seal end head 223. The inner end surface of the first end head 212 is an end surface on the first channel 2111 side, and the inner end surface of the second end head 213 is an end surface on the second channel 2112 side. As shown in fig. 6 and 7, when the sealing tip 223 includes a spherical surface portion on the outer end surface thereof or the sealing tip 223 includes a hemispherical shell, the inner end surface of the first tip 212 and the inner end surface of the second tip 213 have a concave spherical structure (inner peripheral wall 2104) matching the convex spherical shape. When the spool 22 moves to the first end 213 or the second end 213 side, a fitting seal with the seal end 223 of the spool 22 is achieved.

As shown in fig. 1 to 10, an embodiment of the present disclosure provides a refrigeration system including the gas bearing gas supply system for an air suspension compressor.

The refrigeration system of the embodiment of the present disclosure includes a gas suspension compressor 31, a condenser 32, a throttling device, and an evaporator, which are connected in sequence, and are connected by a pipeline to form a refrigeration cycle loop. The pipeline of the refrigeration circulation loop is also provided with structural components such as a one-way valve, a flow control device (an electric ball valve), a filter, a fluid monitoring device and the like, and the setting position and the setting mode can be realized by adopting conventional means, which is not described again.

In the refrigeration system of the embodiment of the present disclosure, the gas bearing gas supply system combines two gas supply modes, namely, gas supply from the gas supply tank 11 and gas supply from the gas suspension compressor 31 itself, and by switching the first gas supply line 12 and the second gas supply line 13, the gas bearing gas supply from the gas supply tank 11 to the gas suspension compressor 31 is avoided, energy loss caused by the gas supply tank 11 is reduced, energy waste is avoided, and cost is saved.

In the embodiment of the present disclosure, the refrigeration system may be any water chiller system using the air suspension compressor 31, an air conditioning system, or a refrigeration system of a refrigerator.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A gas bearing gas supply system for a gas suspension compressor, comprising:

one end of the first air supply pipeline is communicated with the air port on the air supply tank, and the other end of the first air supply pipeline is communicated with the air supply port of the air suspension compressor;

and switching the air supply pipeline of the gas bearing of the gas suspension compressor is completed through switching on the first air supply pipeline and switching off the second air supply pipeline, or switching off the first air supply pipeline and switching on the second air supply pipeline.

2. The gas bearing gas supply system of claim 1, further comprising:

the output end of the first controller is respectively connected with the control end of the heating device in the gas supply tank and the control end of the gas suspension compressor;

when a first controller receives a starting signal of the air suspension compressor, the heating device is controlled to be started and the first air supply pipeline is conducted; when the air supply pressure of the air supply tank reaches a first set value, controlling to start the air suspension compressor;

and when the gas pressure at the air outlet of the gas suspension compressor reaches or is greater than a first set value, the first controller controls to conduct the second air supply pipeline and cut off the first air supply pipeline.

3. The gas bearing gas supply system of claim 2, further comprising:

the first control valve is arranged on the first air supply pipeline; the control end of the first control valve is connected with the output end of the first controller;

the second control valve is arranged on the second air supply pipeline; the control end of the second control valve is connected with the output end of the first controller;

the sensing end of the first pressure sensor is arranged in the gas supply tank or on a pipeline at the gas port of the gas supply tank, and the output end of the first pressure sensor is connected with the input end of the first controller;

and the sensing end of the second pressure sensor is arranged on a pipeline at the air outlet of the air suspension compressor, and the output end of the second pressure sensor is connected with the input end of the first controller.

4. The gas bearing gas supply system of claim 1, further comprising:

the self-operated three-way valve comprises a first port, a second port and a third port;

the first port and the third port are connected into the first air supply pipeline, and when the first port and the third port are communicated, the first air supply pipeline is conducted;

the second port and the third port are connected to the second air supply pipeline, and when the second port is communicated with the third port, the second air supply pipeline is conducted.

5. The gas bearing gas supply system of claim 4, further comprising:

the output end of the second controller is respectively connected with the control end of the heating device in the gas supply tank and the control end of the gas suspension compressor;

when the second controller receives a starting signal of the air suspension compressor, the heating device is controlled to be started; when the air outlet pressure of the air supply tank reaches a first set value, controlling to start the air suspension compressor;

and when the second controller determines that the second port and the third port of the self-operated three-way valve are communicated, controlling to stop the heating device.

6. A gas bearing gas supply system according to claim 2, 3 or 5,

when the gas bearing gas supply system comprises a first controller, the first controller controls to start the heating device when the gas supply pressure of the gas supply tank is lower than the first set value in the period that the second gas supply pipeline is conducted;

when the gas bearing gas supply system comprises a second controller, in the period that the second gas supply pipeline is conducted, when the gas supply pressure of the gas supply tank is lower than the first set value, the second controller controls to start the heating device.

7. A gas bearing gas supply system according to claim 4 or 5, wherein the self-operated three-way valve comprises:

a valve body provided with a first port, a second port and a third port; the first port and the second port are arranged oppositely, and a valve cavity is formed between the first port and the second port; the third port is arranged on the side wall of the valve cavity;

the valve core comprises a support and a thrust plate, the support is matched with the valve cavity and is movably arranged in the valve cavity, and the thrust plate is arranged on the support and is matched with the section of the valve cavity; the thrust plate drives the valve core to move in the valve cavity under the pushing action of fluid, so that the second port is blocked to conduct the first port and the third port, or the first port is blocked to conduct the second port and the third port.

8. The gas bearing gas supply system of claim 7, wherein the valve cartridge further comprises:

the sealing end heads are respectively arranged at two end parts of the bracket;

the sealing end head comprises an air inlet part and a sealing part; the air inlet part is positioned at the periphery of the sealing part and is provided with an air inlet hole; the seal is adapted to the first port or the second port of the valve body.

9. The gas bearing gas supply system of claim 7, wherein the self-operated three-way valve further comprises:

a signal generator provided on the valve element;

the signal sensing body is arranged on the valve body;

the signal sensing body can sense the signal of the signal generating body to acquire the relative position of the valve core.

10. A refrigeration system comprising a gas bearing gas supply system as claimed in any one of claims 1 to 9.