WO2023035655A1

WO2023035655A1 - Air supply system for suspension bearing and refrigeration system

Info

Publication number: WO2023035655A1
Application number: PCT/CN2022/093445
Authority: WO
Inventors: 张晓锐; 张捷; 邓善营; 王铁伟
Original assignee: 青岛海尔空调电子有限公司; 青岛海尔空调器有限总公司; 海尔智家股份有限公司
Priority date: 2021-09-08
Filing date: 2022-05-18
Publication date: 2023-03-16
Also published as: CN113847345A; CN113847345B

Abstract

An air supply system for a suspension bearing, relating to the technical field of refrigeration. The system comprises: a compressor (100), comprising a suspension bearing; a first circulation assembly, comprising a condenser (120) and an evaporator (110) communicated with the condenser (120); and a second circulation assembly, comprising an air supply tank (200) and an air supply box (210), the air supply tank (200) being communicated with the suspension bearing and used for supplying air to the suspension bearing, the air supply box (210) comprising an outer cavity (212) and an inner cavity (211) formed inside the outer cavity (212), and the inner cavity (211) being a deformable cavity. The evaporator (110) is communicated with the air supply tank (200) by means of the inner cavity (211), and the inner cavity (211) obtains air from the evaporator (110); the condenser (120) is communicated with the outer cavity (212), and the outer cavity (212) obtains air from the condenser (120); by means of a pressure difference between the air inside the outer cavity (212) and the air inside the inner cavity (211), the inner cavity (211) is forced to deform, so that the inner cavity (211) supplies air to the air supply tank (200), thereby stably supplying air to the suspension bearing. Also provided is a refrigeration system.

Description

Air supply system and refrigeration system for suspension bearings

This application is based on a Chinese patent application with application number 202111052303.4 and a filing date of September 8, 2021, and claims the priority of this Chinese patent application. The entire content of this Chinese patent application is hereby incorporated by reference into this application.

technical field

The present application relates to the technical field of refrigeration, for example, to an air supply system and a refrigeration system for suspension bearings.

Background technique

At present, air suspension compressors use suspension bearings, and supply air or liquid to the suspension bearings through the air supply system, so as to support the rotor. The prior art discloses a gas supply system for suspension bearings, which directly obtains gaseous refrigerant from the evaporator or condenser through the communication flow path, and passes it into the suspension bearing of the compressor, so that the rotor is suspended on the suspension bearing Inside.

In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art: the gaseous refrigerant is directly obtained from the evaporator or condenser and supplied to the suspension bearing. This kind of gas supply system is unstable and affects the air suspension compressor. reliability.

Contents of the invention

In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is presented below. The summary is not intended to be an extensive overview nor to identify key/important elements or to delineate the scope of these embodiments, but rather serves as a prelude to the detailed description that follows.

Embodiments of the present disclosure provide an air supply system and a refrigeration system for a suspension bearing, which solves the problem of an unstable air supply system.

In some embodiments, the air supply system for suspension bearings includes:

compressors, including suspension bearings;

The first circulation assembly includes a condenser and an evaporator connected to the condenser; the condenser communicates with the exhaust port of the compressor, and the evaporator communicates with the suction port of the compressor ;

The second circulation assembly includes an air supply tank and an air supply box; the air supply tank is communicated with the suspension bearing and used to supply air to it; the air supply box includes an outer cavity and an inner cavity arranged in the outer cavity cavity, and the inner cavity is a deformable cavity;

Wherein, the evaporator communicates with the air supply tank through the inner chamber, and the inner chamber takes air from the evaporator; and the condenser communicates with the outer chamber, and the outer chamber takes air from the outer chamber The condenser takes gas;

The inner cavity is forced to deform by the pressure difference between the gas in the outer cavity and the gas in the inner cavity, so that the inner cavity supplies gas to the gas supply tank.

Optionally, the outer chamber communicates with the air supply tank, and the outer chamber can supply air to the air supply tank.

Optionally, the outer chamber communicates with the air supply tank through a first pressure regulating part, and the first pressure regulating part is used to adjust the air pressure in the air supply tank.

Optionally, the first pressure regulating part includes a first throttling device, and the first throttling device adjusts the flow rate of the gas in the gas supply tank by adjusting the flow rate of the gas supplied from the outer chamber to the gas supply tank. air pressure.

Optionally, the outer cavity is communicated with the air supply tank through a second pressure regulating part, and the second pressure regulating part is used for regulating the pressure difference.

Optionally, the condenser is connected to the outer cavity through a second throttling device;

The second pressure regulating part includes a vacuum pump, and the vacuum pump is used to draw gas in the outer cavity to adjust the pressure difference when the second throttling device is closed.

Optionally, the second circulation assembly further includes an air storage tank, and the vacuum pump communicates with the air supply tank through the air storage tank;

The gas storage tank is communicated with the condenser for returning gas to the condenser.

Optionally, the air storage tank is communicated with the air supply tank through a third throttling device, and the air storage tank is communicated with the condenser through a fourth throttling device;

When the air pressure in the air supply tank exceeds a preset air pressure value, the third throttling device is closed and the fourth throttling device is opened, so that the air storage tank returns air to the condenser.

Optionally, the first circulation component further includes an economizer, the condenser communicates with the evaporator through the economizer, and the economizer communicates with the air supply port of the compressor through the air supply pipeline;

The inner cavity communicates with the gas supply pipeline, so as to take gas from the gas supply pipeline.

In some embodiments, the refrigeration system includes the air supply system for suspension bearings in any of the above embodiments.

The air supply system and refrigeration system for suspension bearings provided by the embodiments of the present disclosure can achieve the following technical effects:

Using the air supply system for suspension bearings provided by the embodiments of the present disclosure, the inner cavity obtains low-temperature and low-pressure gaseous refrigerant from the evaporator, and the inner cavity deforms and expands after being filled with the gaseous refrigerant. Then, the outer cavity obtains high-temperature and high-pressure gaseous refrigerant from the condenser. At this time, a pressure difference is generated between the outer cavity and the inner cavity, and the air pressure of the outer cavity is greater than that of the inner cavity. Under the action of the pressure difference, the deformation of the inner cavity is forced to shrink, and the inner cavity When the cavity shrinks, the gaseous refrigerant in the cavity is supplied to the air supply tank, and finally, the gas supply tank supplies the gaseous refrigerant to the suspension bearing. In this way, it is more stable and reliable than the air supply system that directly takes air from the evaporator or condenser to the suspension bearing.

The foregoing general description and the following description are exemplary and explanatory only and are not intended to limit the application.

Description of drawings

One or more embodiments are exemplified by the corresponding drawings, and these exemplifications and drawings do not constitute a limitation to the embodiments, and elements with the same reference numerals in the drawings are shown as similar elements, The drawings are not limited to scale and in which:

Fig. 1 is a schematic diagram of an air supply system of a suspension bearing provided by an embodiment of the present disclosure;

Fig. 2 is an enlarged view of part A of Fig. 1;

Fig. 3 is a schematic structural diagram of an air supply box provided by an embodiment of the present disclosure;

Fig. 4 is a schematic diagram of another air supply system of a suspension bearing provided by an embodiment of the present disclosure;

Fig. 5 is a schematic diagram of another air supply system of a suspension bearing provided by an embodiment of the present disclosure;

Fig. 6 is a schematic diagram of another air supply system of a suspension bearing provided by an embodiment of the present disclosure.

Reference signs:

100: compressor; 110: evaporator; 120: condenser; 130: economizer; 131: air supply pipeline; 200: air supply tank; 210: air supply box; 211: inner cavity; 212: outer cavity; 220: Air storage tank; 300: vacuum pump;

410: the first solenoid valve; 420: the second solenoid valve; 430: the third solenoid valve; 440: the fourth solenoid valve; 450: the fifth solenoid valve; 460: the sixth solenoid valve; 470: the seventh solenoid valve; 480 : The eighth solenoid valve;

510: the first one-way valve; 520: the second one-way valve; 530: the third one-way valve; 540: the fourth one-way valve; 550: the fifth one-way valve; 560: the sixth one-way valve; 570: The seventh one-way valve;

P1: the first air pressure sensor; P2: the second air pressure sensor.

Detailed ways

In order to understand the characteristics and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. The attached drawings are only for reference and description, and are not intended to limit the embodiments of the present disclosure. In the following technical description, 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 simplified in order to simplify the drawings.

The terms "first", "second" and the like in the description and claims of the embodiments of the present disclosure and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It should be understood that the data so used may be interchanged under appropriate circumstances so as to facilitate the embodiments of the disclosed embodiments described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In the embodiments of the present disclosure, the orientations or positional relationships indicated by the terms "upper", "lower", "inner", "middle", "outer", "front", "rear" etc. are based on the orientations or positional relationships shown in the drawings. Positional relationship. These terms are mainly used to better describe the embodiments of the present disclosure and their implementations, and are not used to limit that the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation. Moreover, some of the above terms may be used to indicate other meanings besides orientation or positional relationship, for example, the term "upper" may also be used to indicate a certain attachment relationship or connection relationship in some cases. Those skilled in the art can understand the specific meanings of these terms in the embodiments of the present disclosure according to specific situations.

In addition, the terms "setting", "connecting" and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediary, or two devices, components or Internal connectivity between components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present disclosure according to specific situations.

Unless stated otherwise, the term "plurality" means two or more.

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

The term "and/or" is an associative relationship describing objects, indicating that there can be three relationships. For example, A and/or B means: A or B, or, A and B, these three relationships.

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

The compressor refrigeration system generally includes a compressor 100, a condenser 120, a capillary tube and an evaporator 110, wherein the condenser 120 is connected to the exhaust port of the compressor 100, the condenser 120 is connected to the evaporator 110 through a capillary tube, and the evaporator 110 is connected to the exhaust port of the compressor 100. The suction port of the compressor 100 is connected, and the refrigerant discharged from the discharge port of the compressor 100 passes through the condenser 120, the capillary tube and the evaporator 110 in sequence, and finally returns to the compressor 100 and is recompressed, so that the refrigerant circulates. The refrigerant is compressed by the compressor 100 and becomes a high-temperature and high-pressure gaseous refrigerant. After entering the condenser 120, the high-temperature and high-pressure gaseous refrigerant becomes a high-temperature and high-pressure liquid refrigerant and flows to the capillary tube. The liquid refrigerant flows to the evaporator 110. The low-temperature and low-pressure liquid refrigerant enters the evaporator 110 and becomes a low-temperature and low-pressure gaseous refrigerant and flows back to the compressor 100. The refrigerant evaporates and absorbs heat in the evaporator 110 to realize the cooling function.

Air-suspension compressors use suspension bearings, which include air-suspension bearings or gas-liquid suspension bearings. Air-suspension bearings use the air film formed by gas extrusion to support the rotor to achieve support and lubrication. Gas-liquid suspension bearings are formed by gas and liquid extrusion. The air-liquid film supports the rotor to achieve support and lubrication. The suspension bearing not only has low friction loss and high temperature resistance, but also has a simple structure and high rotation accuracy. It is considered to be an ideal support component under high-speed operation and high-temperature conditions. Regardless of whether the air suspension compressor adopts air suspension bearings or air-liquid suspension bearings, a set of air supply system is required to supply gas to the suspension bearings.

As shown in FIG. 1 , an embodiment of the present disclosure provides an air supply system for a suspension bearing, including a compressor 100 , a first circulation assembly and a second circulation assembly. Wherein, the compressor 100 includes a suspension bearing; the first circulation assembly includes a condenser 120 and an evaporator 110, and the condenser 120 communicates with the evaporator 110; the condenser 120 communicates with the exhaust port of the compressor 100, and the evaporator 110 It communicates with the suction port of the compressor 100; the second circulation assembly includes an air supply tank 200 and an air supply box 210; the air supply tank 200 communicates with the suspension bearing and is used to supply air to it; the air supply box 210 includes an outer chamber 212 and an air supply box 210. The inner cavity 211 is arranged in the outer cavity 212, and the inner cavity 211 is a deformable cavity; wherein, the evaporator 110 communicates with the gas supply tank 200 through the inner cavity 211, and the inner cavity 211 takes gas from the evaporator 110; and The condenser 120 is connected to the outer cavity 212, and the outer cavity 212 takes air from the condenser 120; the pressure difference between the gas in the outer cavity 212 and the gas in the inner cavity 211 forces the inner cavity 211 to deform, so that the inner cavity 211 supplies gas Tank 200 gas supply.

Using the air supply system for the suspension bearing provided by the embodiment of the present disclosure, the inner cavity 211 obtains low-temperature and low-pressure gaseous refrigerant from the evaporator 110 , and the inner cavity 211 deforms and expands after being filled with the gaseous refrigerant. Then, the outer cavity 212 obtains high-temperature and high-pressure gaseous refrigerant from the condenser 120. At this time, a pressure difference is generated between the outer cavity 212 and the inner cavity 211, and the air pressure of the outer cavity 212 is greater than that of the inner cavity 211. Under the action of the pressure difference, the inner cavity is forced to The cavity 211 is deformed and shrunk, and the gaseous refrigerant in the cavity is supplied to the air supply tank 200 while the inner cavity 211 is shrunk. Finally, the gas supply tank 200 supplies the gaseous refrigerant to the suspension bearing. In this way, compared with the air supply system that directly takes air from the evaporator 110 or the condenser 120 to the suspension bearing, it is more stable and reliable.

Optionally, as shown in FIG. 3 , the inner cavity 211 adopts a corrugated airbag. When the inner cavity 211 takes air from the evaporator 110, the corrugated airbag gradually expands after inflating; the outer cavity 212 is a non-deformable cavity, and when the outer cavity 212 takes air from the condenser 120, the air pressure in the outer cavity 212 gradually expands. Enhanced, when the air pressure in the outer chamber 212 is greater than that in the inner chamber 211 , the pressure difference forces the corrugated airbag to shrink gradually, and the low-pressure gaseous refrigerant in the corrugated airbag is supplied to the gas supply tank 200 .

Optionally, the air supply tank 200 communicates with the suspension bearing of the compressor 100 through the third one-way valve 530, and the third one-way valve 530 allows gaseous refrigerant to flow from the air supply tank 200 to the suspension bearing. In this way, it is possible to prevent the gaseous refrigerant in the suspension bearing from flowing back into the air supply tank 200 .

Optionally, the evaporator 110 communicates with the inner cavity 211 through the fifth solenoid valve 450 . In this way, when the fifth solenoid valve 450 is open, the inner chamber 211 can obtain gaseous refrigerant from the evaporator 110 .

Further, a first air pressure sensor P1 is disposed in the inner cavity 211 , and the first air pressure sensor P1 is used to monitor the air pressure in the inner cavity 211 .

Furthermore, the fifth solenoid valve 450 communicates with the inner cavity 211 through the fifth one-way valve 550 , and the fifth one-way valve 550 allows the gaseous refrigerant to flow from the evaporator 110 to the inner cavity 211 . In this way, the gaseous refrigerant in the inner chamber 211 can be prevented from flowing back into the evaporator 110 .

Optionally, as shown in FIG. 2 , the inner cavity 211 communicates with the air supply tank 200 through the sixth solenoid valve 460 . In this way, when the sixth solenoid valve 460 is in an open state, the gaseous refrigerant in the inner chamber 211 can flow to the gas supply tank 200 .

Further, the sixth solenoid valve 460 is connected to the air supply tank 200 through the sixth one-way valve 560 , and the sixth one-way valve 560 allows the gaseous refrigerant to flow from the inner cavity 211 to the air supply tank 200 . In this way, the gaseous refrigerant in the air supply tank 200 can be prevented from flowing back into the inner cavity 211 .

In some embodiments, the fifth solenoid valve 450, the sixth solenoid valve 460, and the first air pressure sensor P1 are all electrically connected to the air supply controller, and the first air pressure sensor P1 transmits the monitored air pressure signal to the air supply controller. The air controller controls the states of the fifth solenoid valve 450 and the sixth solenoid valve 460 according to the air pressure signal.

Exemplarily, when the first air pressure sensor P1 detects that the air pressure in the inner cavity 211 is zero, that is, the gaseous refrigerant in the inner cavity 211 is completely emptied, the air supply controller controls the fifth solenoid valve 450 to open and the sixth solenoid valve 460 is closed, and the inner cavity 211 can take air from the evaporator 110; when the first air pressure sensor P1 detects that the air pressure in the inner cavity 211 reaches the full pressure value of the inner cavity 211, the air supply controller controls the fifth solenoid valve 450 to close And the sixth solenoid valve 460 is opened, at this time, the pressure difference between the gas in the outer cavity 212 and the gas in the inner cavity 211 can force the inner cavity 211 to deform, so that the inner cavity 211 can supply gas to the gas supply tank 200 .

In some embodiments, as shown in FIG. 5 , the first cycle assembly further includes an economizer 130, the condenser 120 is communicated with the evaporator 110 through the economizer 130, and the economizer 130 is communicated with the supplementary gas of the compressor 100 through the supplementary air pipeline 131. Air port; the inner cavity 211 communicates with the air supply pipeline 131 to take air from the air supply pipeline 131 .

After the high-pressure liquid refrigerant from the condenser 120 enters the economizer 130, part of the refrigerant is throttled and evaporated to absorb heat to cool the other part of the refrigerant. The cooled liquid refrigerant flows to the evaporator 110, and the uncooled gas refrigerant passes through the gas supply pipeline. 131 from the air supply port of the compressor 100

Returning to the compressor 100 for recompression, the pressure of the gaseous refrigerant in the supplementary gas pipeline 131 is lower than that of the gaseous refrigerant in the condenser 120 . At this time, the inner cavity 211 can obtain the gaseous refrigerant from the gas supply pipeline 131 , and the gaseous refrigerant in the gas supply pipeline 131 is fully utilized.

Optionally, as shown in FIG. 6 , the air supply pipeline 131 communicates with the inner chamber 211 through the seventh solenoid valve 470 . When the seventh electromagnetic valve 470 is open, the inner cavity 211 can take air from the air supply pipeline 131 .

Further, the seventh solenoid valve 470 communicates with the inner cavity 211 through the seventh one-way valve 570 , and the seventh one-way valve 570 allows the gaseous refrigerant to flow from the supplementary gas pipeline 131 to the inner cavity 211 . In this way, it is possible to prevent the gaseous refrigerant in the inner chamber 211 from flowing back into the air supply pipeline 131 .

In some embodiments, as shown in FIG. 3 , the outer cavity 212 communicates with the gas supply tank 200 , and the outer cavity 212 can supply gas to the gas supply tank 200 . In this way, the high-temperature and high-pressure gaseous refrigerant supplied by the condenser 120 to the outer cavity 212 can not only form a pressure difference with the low-temperature and low-pressure gaseous refrigerant in the inner cavity 211, but also be supplied to the air supply tank 200, thereby improving the air supply. The temperature and pressure of the gaseous refrigerant in the tank 200.

Optionally, the outer cavity 212 communicates with the air supply tank 200 through a first pressure regulating part, and the first pressure regulating part is used to adjust the air pressure in the air supply tank 200 . Since the outer chamber 212 obtains high-temperature and high-pressure gaseous refrigerant from the condenser 120, and the inner chamber 211 obtains low-temperature and low-pressure gaseous refrigerant from the evaporator 110, two different types of refrigerants are supplied by the outer chamber 212 and the inner chamber 211 respectively. into the air supply tank 200 and mixed in the air supply tank 200 , the air pressure of the mixed refrigerant changes, and the air pressure in the air supply tank 200 can be adjusted by the first pressure regulating part. It can be understood that when the first pressure regulating part regulates the air pressure in the air supply tank 200, the temperature of the air supply tank 200 is also adjusted.

Further, the first pressure regulating part includes a first throttling device, and the first throttling device adjusts the air pressure in the gas supply tank 200 by adjusting the flow rate of the gas supplied from the outer cavity 212 to the gas supply tank 200 . In this way, the low-pressure and low-temperature gaseous refrigerant in the inner chamber 211 and the high-pressure and high-temperature gaseous refrigerant in the outer chamber 212 form a mixed gaseous refrigerant in the air supply tank 200, and the outer chamber 212 is controlled to supply to the air supply tank 200 through the first throttling device. The flow rate of the high-pressure gaseous refrigerant can adjust the content of the high-pressure and high-temperature gaseous refrigerant in the mixed gaseous refrigerant, thereby adjusting the pressure of the mixed gaseous refrigerant in the gas supply tank 200, and meanwhile the temperature of the mixed gaseous refrigerant is also adjusted.

Furthermore, the first throttling device includes a first solenoid valve 410. When the first solenoid valve 410 is opened, the high-temperature and high-pressure gaseous refrigerant in the outer cavity 212 can flow to the gas supply tank 200, and the first solenoid valve 410 can Control the flow of refrigerant in the pipeline by controlling its own opening.

Further, the first solenoid valve 410 communicates with the air supply tank 200 through the first one-way valve 510 , and the first one-way valve 510 allows the gaseous refrigerant to flow from the outer cavity 212 to the air supply tank 200 . In this way, the gaseous refrigerant in the gas supply tank 200 can be prevented from flowing back into the outer cavity 212 .

Furthermore, the air supply tank 200 is provided with a second air pressure sensor P2, and the second air pressure sensor P2 is used to monitor the air pressure in the air supply tank 200.

In some embodiments, both the first solenoid valve 410 and the second air pressure sensor P2 are electrically connected to the air supply controller, and the second air pressure sensor P2 transmits the air pressure signal in the air supply tank 200 to the air supply controller, and the air supply control The device controls the state of the first solenoid valve 410 according to the air pressure signal.

Exemplarily, when the second air pressure sensor P2 detects that the air pressure in the air supply tank 200 is lower than the preset air pressure value, the air supply controller controls the opening of the first solenoid valve 410 to increase, so that more The high-pressure gaseous refrigerant quickly enters the air supply tank 200, thereby increasing the air pressure in the air supply tank 200.

In some embodiments, as shown in FIG. 4 , the outer chamber 212 communicates with the evaporator 110 through the eighth solenoid valve 480 , so that the refrigerant in the outer chamber 212 can also enter the evaporator 110 through the eighth solenoid valve 480 .

In some embodiments, the condenser 120 communicates with the outer chamber 212 through the second solenoid valve 420 , so that the outer chamber 212 can take air from the condenser 120 when the second solenoid valve 420 is opened.

Further, the second solenoid valve 420 communicates with the outer cavity 212 through the second one-way valve 520 , and the second one-way valve 520 allows the gaseous refrigerant to flow from the condenser 120 to the outer cavity 212 . In this way, the gaseous refrigerant in the outer chamber 212 can be prevented from flowing back into the condenser 120 .

In some embodiments, the first electromagnetic valve 410, the second electromagnetic valve 420, and the first air pressure sensor P1 are all electrically connected to the air supply controller, and the air supply controller controls the first electromagnetic valve according to the air pressure signal of the first air pressure sensor P1. 410 and the state of the second solenoid valve 420.

Exemplarily, when the first air pressure sensor P1 detects that the air pressure in the inner cavity 211 is zero, the air supply controller controls the second electromagnetic valve 420 to close and the first electromagnetic valve 410 to open at the same time. 120 takes air, and at the same time, the gaseous refrigerant in the outer chamber 212 is supplied to the gas supply tank 200, so that the pressure difference gradually disappears, and the inner chamber 211 is no longer under pressure and can continue to take air from the evaporator 110. When the first air pressure sensor P1 detects that the air pressure in the inner chamber 211 reaches the full air pressure value of the inner chamber 211, the air supply controller controls the second solenoid valve 420 to open and the first solenoid valve 410 to close at the same time, the outer chamber 212 can be opened from The condenser 120 takes air so that the air pressure in the outer chamber 212 is gradually higher than the air pressure in the inner chamber 211 , and the pressure difference forces the inner chamber 211 to deform and shrink to supply air to the air supply tank 200 .

In some embodiments, the outer cavity 212 communicates with the gas supply tank 200 through the second pressure regulating part, and the second pressure regulating part is used to adjust the pressure difference.

Optionally, as shown in FIG. 1, the condenser 120 is connected to the outer chamber 212 through a second throttling device; the second pressure regulating part includes a vacuum pump 300, and the vacuum pump 300 is used to extract the outer chamber 212 when the second throttling device is closed. The gas inside to adjust the pressure difference. In this way, when the second throttling device is closed, the outer cavity 212 no longer takes air from the condenser 120. At this time, the high-pressure gaseous refrigerant in the outer cavity 212 is extracted by the vacuum pump 300, so that the air pressure in the outer cavity 212 can be quickly reduced; When the air pressure in the outer chamber 212 is lower than the air pressure in the inner chamber 211 , the inner chamber 211 is no longer squeezed by the pressure difference, and the inner chamber 211 can continue to take air from the evaporator 110 at this time.

Further, the second throttling device includes a second solenoid valve 420 , and the second solenoid valve 420 communicates with the outer chamber 212 through the second one-way valve 520 .

Furthermore, a third air pressure sensor is provided in the outer cavity 212 , and the third air pressure sensor is used to monitor the air pressure in the outer cavity 212 .

Optionally, the second circulation component further includes an air storage tank 220 through which the vacuum pump 300 communicates with the air supply tank 200 ; the air storage tank 220 communicates with the condenser 120 for returning air to the condenser 120 . In this way, the gas storage tank 220 plays the role of temporarily storing the gaseous refrigerant. After the gaseous refrigerant in the outer cavity 212 is sucked into the gas storage tank 220 by the vacuum pump 300 , it can enter the gas supply tank 200 and flow back to the condenser 120 .

Optionally, the air storage tank 220 is communicated with the air supply tank 200 through the third throttling device, and the air storage tank 220 is communicated with the condenser 120 through the fourth throttling device; when the air pressure in the air supply tank 200 exceeds the preset air pressure value, The third throttling device is closed and the fourth throttling device is opened, so that the gas storage tank 220 returns air to the condenser 120 .

Further, the third throttling device includes a third solenoid valve 430 , the fourth throttling device includes a fourth solenoid valve 440 , and the air supply tank 200 is provided with a second air pressure sensor P2.

Furthermore, the fourth solenoid valve 440 is communicated with the condenser 120 through the fourth one-way valve 540 , and the fourth one-way valve 540 allows the gaseous refrigerant to flow from the vent tank to the condenser 120 . In this way, the gaseous refrigerant in the condenser 120 can be prevented from flowing back into the vent tank.

In some embodiments, the third electromagnetic valve 430, the fourth electromagnetic valve 440, and the second air pressure sensor P2 are all electrically connected to the air supply controller, and the air supply controller controls the third electromagnetic valve according to the air pressure signal of the second air pressure sensor P2. 430 and the state of the fourth solenoid valve 440.

Exemplarily, when the second air pressure sensor P2 detects that the air pressure of the air supply tank 200 exceeds the preset air pressure value, the third electromagnetic valve 430 is controlled to be closed while the fourth electromagnetic valve 440 is opened. Air is supplied from the air tank 200 and returned to the condenser 120 only through the fourth solenoid valve 440. A refrigerant circulation loop is formed between the condenser 120 and the outer chamber 212 to prevent the air pressure of the air supply tank 200 from being too high. When the second air pressure sensor P2 detects that the air pressure of the air supply tank 200 is lower than the preset air pressure value, the third electromagnetic valve 430 is controlled to open while the fourth electromagnetic valve 440 is closed. At this time, the air storage tank 220 only supplies air to the air supply tank 200 gas, the gas supply rate of the gas supply tank 200 can be increased.

Here, the air supply control process of the air supply system for suspension bearings is described in conjunction with Figure 1:

(1) Control the opening of the fifth electromagnetic valve 450, the inner cavity 211 obtains low-pressure gaseous refrigerant from the evaporator 110, and the inner cavity 211 gradually deforms and expands;

(2) After the gaseous refrigerant in the inner cavity 211 is full, the second electromagnetic valve 420 is controlled to open and the first electromagnetic valve 410 is closed, and the outer cavity 212 obtains high-pressure gaseous refrigerant from the condenser 120, and the inner cavity 211 and the outer cavity 212 generate pressure. Poor, the high-pressure gaseous refrigerant forces the inner cavity 211 to deform and shrink;

(3) Control the opening of the sixth electromagnetic valve 460, and squeeze the gaseous refrigerant in the cavity to the air supply tank 200 while the deformation of the inner cavity 211 shrinks, and the gas supply tank 200 supplies air to the suspension bearing;

(4) After the gaseous refrigerant in the inner chamber 211 is emptied, the first solenoid valve 410 is controlled to open and the second solenoid valve 420 is closed, and the vacuum pump 300 is controlled to start, and the gaseous refrigerant in the outer chamber 212 is pumped into the gas storage tank 220, The pressure difference gradually disappears so that the inner cavity 211 returns to the state where it can take air;

(5), according to the state of the air pressure in the air supply tank 200, control the third electromagnetic valve 430 to open so that the refrigerant in the air storage tank 220 flows to the air supply tank 200, or control the fourth electromagnetic valve 440 to open to make the refrigerant in the air supply tank 200 open. The gaseous refrigerant flows to the condenser 120.

In some embodiments, an embodiment of the present disclosure further provides a refrigeration system, including the air supply system for a suspension bearing in any of the above embodiments.

The above description and drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural and other changes. The examples merely represent possible variations. Individual components and functions are optional unless explicitly required, and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. 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

An air supply system for a suspension bearing, characterized in that it comprises:

compressors, including suspension bearings;

The first circulation assembly includes a condenser and an evaporator connected to the condenser; the condenser communicates with the exhaust port of the compressor, and the evaporator communicates with the suction port of the compressor ;

The second circulation assembly includes an air supply tank and an air supply box; the air supply tank is communicated with the suspension bearing and used to supply air to it; the air supply box includes an outer cavity and an inner cavity arranged in the outer cavity cavity, and the inner cavity is a deformable cavity;

Wherein, the evaporator communicates with the air supply tank through the inner chamber, and the inner chamber takes air from the evaporator; and the condenser communicates with the outer chamber, and the outer chamber takes air from the outer chamber The condenser takes gas;

The inner cavity is forced to deform by the pressure difference between the gas in the outer cavity and the gas in the inner cavity, so that the inner cavity supplies gas to the gas supply tank.
The air supply system for suspension bearings according to claim 1, wherein the outer chamber is connected to the air supply tank, and the outer chamber can supply air to the air supply tank.
The air supply system for suspension bearings according to claim 2, wherein the outer cavity communicates with the air supply tank through a first pressure regulating part, and the first pressure regulating part is used to adjust the The air pressure in the air supply tank.
The air supply system for suspension bearings according to claim 3, wherein the first pressure regulating part includes a first throttling device, and the first throttling device supplies air to the The flow rate of the gas in the gas supply tank is adjusted to adjust the air pressure in the gas supply tank.
The air supply system for suspension bearings according to claim 2, wherein the outer chamber communicates with the air supply tank through a second pressure regulating part, and the second pressure regulating part is used to regulate the differential pressure.
The air supply system for suspension bearings according to claim 5, wherein the condenser is connected to the outer chamber through a second throttling device;

The second pressure regulating part includes a vacuum pump, and the vacuum pump is used to draw gas in the outer cavity to adjust the pressure difference when the second throttling device is closed.
The air supply system for suspension bearings according to claim 6, wherein the second circulation assembly further includes an air storage tank, and the vacuum pump communicates with the air supply tank through the air storage tank;

The gas storage tank is communicated with the condenser for returning gas to the condenser.
The air supply system for suspension bearings according to claim 7, wherein the air storage tank communicates with the air supply tank through a third throttling device, and the air storage tank communicates with the air supply tank through a fourth throttling device communicated with the condenser;

When the air pressure in the air supply tank exceeds a preset air pressure value, the third throttling device is closed and the fourth throttling device is opened, so that the air storage tank returns air to the condenser.
The air supply system for suspension bearings according to claim 1, wherein the first circulation assembly further includes an economizer, the condenser communicates with the evaporator through the economizer, and the economizer The device is connected to the air supply port of the compressor through the air supply pipeline;

The inner cavity communicates with the gas supply pipeline, so as to take gas from the gas supply pipeline.
A refrigeration system, characterized by comprising the air supply system for suspension bearings according to any one of claims 1 to 9.