WO2022042238A1 - Gas bearing air supply system and control method and control apparatus therefor, and refrigeration system - Google Patents

Abstract

The present application relates to the technical field of refrigeration, and discloses a gas bearing air supply system for use in an air suspension compressor, comprising: a plurality of electric heating units, each electric heating unit comprising an air outlet, a liquid inlet, and a communication port; the air outlet of each electric heating unit is in communication with an air supply port of the air suspension compressor by means of an air supply path; the liquid inlet of each electric heating unit is in communication with a condenser in the refrigeration system in which the air suspension compressor is located by means of a liquid intake path; and the communication port of each electric heating unit is in communication with an evaporator in the refrigeration system in which the air suspension compressor is located by means of a communication path. After the liquid intake path and the communication path of the electric heating unit are connected, a partial loop is formed, and pressure difference is used to implement automatic liquid supplementation of the electric heating unit. The refrigerant pump on the liquid intake path in the prior art can be omitted, increasing reliability. Also disclosed in the present application are a control method and a control apparatus for use in the gas bearing air supply system and a refrigeration system.

Description

Gas bearing air supply system and its control method and control device, refrigeration system

This application is based on the Chinese patent application with the application number of 202010873606.1 and the filing date of August 26, 2020, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is incorporated herein by reference.

technical field

The present application relates to the field of refrigeration technology, for example, to a gas bearing air supply system, a control method and a control device thereof, and a refrigeration system.

Background technique

At present, the frictional resistance between the gas and the rotor in the gas bearing is small. Compared with the magnetic bearing, it does not require a complex control system, and has a simple structure and low cost. Therefore, it has been used in centrifugal compressors in recent years to form a gas suspension compressor. Air-suspension compressors have become one of the mainstream directions for the development of centrifugal compressors due to their high efficiency, energy saving, and oil-free characteristics. Supplying air to gas bearings is a key part of ensuring the normal operation of air-suspension compressors. At present, the gas bearing air supply system is mostly realized by the external air supply tank of the compressor: firstly, the refrigerant in the refrigeration system (for example, the condenser) is pumped to the air supply tank through the refrigerant pump, and then heated by the heater, so that the refrigerant is vaporized and A stable pressure is generated, which is connected to the gas bearing of the compressor through the pipeline to realize the bearing gas supply. There is also a gas supply method: use a refrigerant pump to extract liquid refrigerant from the condenser, and then pass it through a throttling device and a gas-liquid separator, and then pass it into the gas bearing. The structure of the entire gas supply system is relatively complicated. Due to the throttling process, The effective loss is huge. It can be seen that the existing gas bearing air supply system requires a refrigerant pump to provide power, and the gas consumption of the gas bearing is often low, which makes it difficult for the refrigerant pump (the refrigerant flow rate is too large at startup) to match the entire air supply system. Start and stop frequently to ensure that the gas supply of the gas supply tank matches the gas consumption of the gas bearing as much as possible.

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: all existing gas bearing air supply systems require a refrigerant pump to provide power, and the refrigerant pump is frequently started and stopped, resulting in reduced reliability of the air supply system.

SUMMARY OF THE INVENTION

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

The embodiments of the present disclosure provide a gas bearing air supply system, a control method, a control device, and a refrigeration system thereof, so as to solve the problem that all existing gas bearing air supply systems require a refrigerant pump to provide power, and the refrigerant pump is frequently started and stopped, resulting in the supply of The technical problem of reducing the reliability of the gas system.

In some embodiments, the gas bearing air supply system is used for an air suspension compressor; the gas bearing air supply system includes: a plurality of electric heating units, each of the electric heating units is connected to a gas through an air supply passage The air supply port of the suspension compressor is in communication, each of the electric heating units communicates with the high-pressure side of the refrigeration system where the air suspension compressor is located through a liquid inlet passage, and each of the electric heating units is connected to the air suspension compressor through a communication passage. The low-pressure side of the refrigeration system is connected; by controlling the conduction or closing of the air supply passage of the electric heating unit, the electric heating unit enters the air supply state or the ready state; by controlling the liquid inlet passage of the electric heating unit The conduction of the communication channel is realized as the liquid replenishment of the electric heating unit.

In some embodiments, the control method for a gas bearing gas supply system, the gas bearing gas supply system is the aforementioned gas bearing gas supply system; the control method includes:

When the first liquid level value of the electric heating unit in the gas supply state reaches the first preset value, the electric heating unit in the ready state is switched to the gas supply state, and the electric heating unit in the gas supply state is switched to the gas supply state. switch to ready state;

When the second liquid level value of the electric heating unit in the ready state reaches the first preset value, control the liquid inlet passage of the electric heating unit in the ready state to conduct, and the electric heating unit in the ready state The communication path is turned on;

When the second liquid level value of the electric heating unit in the ready state reaches a second preset value, the liquid inlet passage of the electric heating unit in the ready state is controlled to be closed, and the electric heating unit in the ready state is controlled to be closed. The communication channel is closed.

In some embodiments, the control device for a gas bearing gas supply system includes a processor and a memory storing program instructions, the processor being configured to, when executing the program instructions, execute the aforementioned for A control method of a gas bearing gas supply system.

In some embodiments, the refrigeration system includes the aforementioned gas bearing gas supply system; and the aforementioned control device for the gas bearing gas supply system.

The gas bearing air supply system and its control method, control device, and refrigeration system provided by the embodiments of the present disclosure can achieve the following technical effects:

The gas bearing air supply system of the embodiment of the present disclosure utilizes the pressure difference between the high pressure side (condenser side) and the low pressure side (evaporator side) in the refrigeration system where the air suspension compressor is located, to connect the inlet of an electric heating unit After the liquid passage and the communication passage are turned on, a partial circuit is formed. In this partial circuit, the pressures on both sides of the electric heating unit are different, and the liquid refrigerant in the condenser on the high pressure side is pressed into the electric heating unit by the pressure difference. Complete the automatic rehydration of the electric heating unit. If the refrigerant pump on the liquid inlet passage in the prior art can be omitted, there is no power equipment in the gas bearing air supply system of the embodiment of the present disclosure, which solves the reliability problems brought by the refrigerant pump and the fluctuation of the gas bearing air supply pressure. problems, the reliability is improved; the high-cost refrigerant pump is omitted, the cost of the air supply system is greatly reduced, and the economic burden of consumers is reduced. Moreover, the structure of the air supply system is simple, the function is easier to realize, and the reliability is improved. On the basis of the intermittent gas supply of the electric heating unit, the uninterrupted and stable gas supply of the entire gas supply system is realized.

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 accompanying drawings, which are not intended to limit the embodiments, and elements with the same reference numerals in the drawings are shown as similar elements, The drawings do not constitute a limitation of scale, and in which:

1 is a schematic structural diagram of a gas bearing gas supply system provided by an embodiment of the present disclosure;

2 is a schematic structural diagram of an electric heating unit of a gas bearing gas supply system provided by an embodiment of the present disclosure;

3 is a schematic diagram of a control method for a gas bearing gas supply system provided by an embodiment of the present disclosure;

4 is a schematic diagram of another control device for a gas bearing gas supply system provided by an embodiment of the present disclosure;

Reference number:

11, electric heating unit; 12, first electric heating unit; 13, second electric heating unit; 111, air outlet; 112, liquid inlet; 113, communication port; 114, heating device; 115, temperature detection device; 116 , pressure detection device; 117, safety valve; 118, liquid level detection device; 21, air supply pipe; 22, first air inlet pipe; 23, second air inlet pipe; 24, first air supply valve; 25, second air supply Valve; 31, liquid inlet pipe; 32, first liquid outlet pipe; 33, second liquid outlet pipe; 34, first liquid inlet valve; 35, second liquid inlet valve; 41, first side connecting pipe; 42, 43, the second and second side communication pipes; 44, the first communication valve; 45, the second communication valve; 51, the air suspension compressor; 511, the air supply port; 52, the condenser; 53. Throttle device; 54. Evaporator.

detailed description

In order to be able to understand the features and technical contents 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 with reference to the accompanying drawings, which are for reference only and are not intended to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, numerous details are provided 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-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data so used may be interchanged under appropriate circumstances for the purposes of implementing the embodiments of the disclosure described herein. Furthermore, the terms "comprising" and "having", and any variations thereof, are intended to cover 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 shown in the drawings or Positional relationship. These terms are primarily used to better describe the embodiments of the present disclosure and embodiments thereof, and are not intended to limit the fact that the indicated device, element, or component must have a particular orientation, or be constructed and operated in a particular orientation. In addition, some of the above-mentioned terms may be used to express other meanings besides orientation or positional relationship. For example, the term "on" may also be used to express a certain attachment or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific situations.

In addition, the terms "arranged", "connected" and "fixed" should be construed broadly. For example, "connection" may be a fixed connection, a detachable connection, or a unitary construction; it may be a mechanical connection, or an electrical connection; it may be a direct connection, or an indirect connection through an intermediary, or two devices, elements or Internal connectivity between components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific situations.

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

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

1-2, an embodiment of the present disclosure provides a gas bearing air supply system for the air suspension compressor 51, the gas bearing air supply system includes a plurality of electric heating units 11, and each electric heating unit 11 passes through The air supply passage communicates with the air supply port 511 of the air suspension compressor 51, each electric heating unit 11 communicates with the high pressure side of the refrigeration system where the air suspension compressor 51 is located through the liquid inlet passage, and each electric heating unit 11 passes through the communication passage. It communicates with the low pressure side of the refrigeration system where the air suspension compressor 51 is located. By controlling the conduction or closing of the air supply passage of the electric heating unit 11, the electric heating unit 11 enters the air supply state or the preparation state (non-air supply state); by controlling the conduction of the liquid inlet passage and the communication passage of the electric heating unit 11 is connected to realize the liquid replenishment of the electric heating unit 11 .

The gas bearing air supply system of the embodiment of the present disclosure utilizes the pressure difference between the high pressure side (condenser side) and the low pressure side (evaporator side) in the refrigeration system where the air suspension compressor 51 is located, to connect the air supply of an electric heating unit After the liquid inlet passage and the communication passage are turned on, a partial circuit is formed. In this partial circuit, the pressures on both sides of the electric heating unit 11 are different, and the pressure difference is used to reduce the pressure in the high-pressure side (for example, the condenser 52 ) in the refrigeration system. The liquid refrigerant is pressed into the electric heating unit 11 to complete the automatic liquid replenishment of the electric heating unit 11 . If the refrigerant pump on the liquid inlet passage in the prior art can be omitted, there is no power equipment in the gas bearing air supply system of the embodiment of the present disclosure, which solves the reliability problems brought by the refrigerant pump and the fluctuation of the gas bearing air supply pressure. problems, the reliability is improved; the high-cost refrigerant pump is omitted, the cost of the air supply system is greatly reduced, and the economic burden of consumers is reduced. Moreover, the structure of the air supply system is simple, the function is easier to realize, and the reliability is improved.

In the gas bearing gas supply system of the embodiment of the present disclosure, including a plurality of electric heating units 11, the plurality of electric heating units 11 can supply gas in turn, so that the gas supply is uninterrupted, and the continuous gas supply of the gas supply system can be ensured. The pressure is stable and does not fluctuate. When the electric heating unit 11 does not supply air (during the preparation state), the liquid inlet passage and the communication passage of the electric heating unit 11 are connected to form a partial circuit, and the pressure difference is used to make the high-pressure side (for example, the condenser 52) in the refrigeration system. ) in the liquid refrigerant is pressed into the electric heating unit 11 to complete the automatic replenishment of the electric heating unit 11 . On the basis that the electric heating unit 11 adopts intermittent gas supply, the uninterrupted and stable gas supply of the entire gas supply system is realized.

In the embodiment of the present disclosure, each electric heating unit 11 has its own air supply passage, liquid inlet passage and communication passage, so that the air supply passage, liquid inlet passage and communication passage of each electric heating unit 11 can be controlled.

In the gas bearing gas supply system of the embodiment of the present disclosure, when the gas supply is started for the first time, the plurality of electric heating units 11 may be filled with liquid refrigerant.

In the gas bearing gas supply system of the embodiment of the present disclosure, the use state of the electric heating unit 11 includes a gas supply state and a ready state (ie, a non-gas supply state). As the name implies, the electric heating unit in the gas supply state is the power supply of the electric heating unit. The air passage is in the conduction state and the electric heating unit 11 is in the heating state, and the electric heating unit 11 supplies the gaseous refrigerant to the air suspension compressor 51; the electric heating unit in the ready state means that the air supply passage of the electric heating unit 11 is closed state and the electric heating unit 11 is in a non-heating state, the gaseous refrigerant in the electric heating unit 11 cannot supply the gaseous refrigerant to the air suspension compressor 51 . An electric heating unit 11 is in a supply state for a period of time and in a ready state for another period of time. From the perspective of one of the electric heating units 11 , the gas is intermittently supplied, but from the perspective of the entire gas supply system, uninterrupted and stable gas supply is realized. The service life of the electric heating unit 11 is increased, and the stability of the air supply system is improved.

In the embodiment of the present disclosure, the high pressure side of the refrigeration system where the air suspension compressor 51 is located is the condenser side, and the low pressure side is the evaporator side. In some embodiments, each electric heating unit 11 communicates with the condenser 52 of the refrigeration system where the air suspension compressor 51 is located through a liquid inlet passage, and each electric heating unit 11 communicates with the refrigeration system where the air suspension compressor 51 is located through a communication passage The evaporator 54 of the system is in communication.

In some embodiments, the plurality of electric heating units 11 are not in the gas supply state or the ready state at the same time. That is, during the gas supply process, when some of the electric heating units 11 in the gas bearing gas supply system are in the gas supply state, the remaining part of the electric heating units 11 are in the ready state. And when the electric heating unit 11 is in the ready state, the conduction of the liquid inlet passage and the communication passage of the electric heating unit is controlled, so as to realize the automatic liquid replenishment of the electric heating unit.

Optionally, among the plurality of electric heating units 11, the number of the electric heating units in the gas supply state is one or more, and the number of the electric heating units in the ready state is one or more. The number of electric heating units in the air supply state may be determined based on the matching of the air consumption of the air suspension compressor 51 and the air supply of the electric heating unit 11 .

Optionally, as shown in FIG. 1 , the gas bearing air supply system includes two electric heating units, a first electric heating unit 12 and a second electric heating unit 13 . When the first electric heating unit 12 is in the gas supply state, the second electric heating unit 13 is in the preparation state; when the first electric heating unit 12 is in the preparation state, the second electric heating unit 13 is in the gas supply state.

In some embodiments, the gas bearing gas supply system further includes a plurality of valves, and the plurality of valves are respectively disposed on the gas supply passage, the liquid inlet passage and the communication passage of the plurality of electric heating units 11 . Thereby, the conduction or closing of the air supply passage, the liquid inlet passage and the communication passage of each electric heating unit 11 can be controlled.

Optionally, the valve includes a one-way valve (not shown) and a solenoid valve. One-way valves are arranged on the air supply passage, the liquid inlet passage and the communication passage respectively to prevent backflow. The solenoid valve realizes the conduction or closing of the air supply passage, the liquid inlet passage and the communication passage of each electric heating unit 11 .

In some embodiments, as shown in FIG. 1 and FIG. 2 , each electric heating unit 11 includes an air outlet 111 , a liquid inlet 112 and a communication port 113 ; the air outlet 111 of each electric heating unit 11 passes through an air supply passage It communicates with the air supply port 511 of the air suspension compressor 51, and the liquid inlet 112 of each electric heating unit 11 communicates with the condenser 52 in the refrigeration system where the air suspension compressor 51 is located through the liquid inlet passage. The communication port 113 of 11 communicates with the evaporator 54 in the refrigeration system where the air suspension compressor 51 is located through a communication passage. By controlling the conduction or closing of the air supply passage communicated with the air outlet 111 of the electric heating unit 11, the electric heating unit 11 enters the air supply state or the ready state (non-air supply state); by controlling the liquid inlet of the electric heating unit 11 The conduction of the liquid inlet passage communicated with 112 and the communication passage communicated with the communication port 113 is realized as the liquid replenishment of the electric heating unit 11 .

In some embodiments, as shown in FIG. 1 , the gas bearing gas supply system further includes one or more of a gas supply pipe group, a liquid inlet pipe group and a communication pipe group, so as to realize the connection between the plurality of electric heating units 11 and the The air supply port 511 of the air suspension compressor 51 communicates with the high pressure side (condenser 52 ) and the low pressure side (evaporator 54 ).

The air supply pipe group includes an air supply pipe 21 and a plurality of air intake pipes. The first end of the air supply pipe 21 is used to communicate with the air supply port 511 of the air suspension compressor 51, and the second end of the air supply pipe 21 is connected to the plurality of air intake pipes. The first ends of the plurality of air intake pipes are communicated with the plurality of electric heating units 11 respectively. That is, the air supply pipe 21 and one intake pipe constitute an air supply passage corresponding to the electric heating unit 11 communicating with the one intake pipe. Optionally, the second ends of the plurality of air intake pipes are respectively communicated with the air outlets 111 of the plurality of electric heating units 11 . By controlling the conduction or closing of the air supply passage, the electric heating unit 11 is controlled to enter the air supply state or the ready state (ie, stop the air supply). As shown in FIG. 1 , the air supply pipe 21 and the first air intake pipe 22 constitute the air supply passage (referred to as the first air supply passage) of the first electric heating unit 12 , and the air supply pipe 21 and the second air intake pipe 23 constitute the second electric heating unit The air supply passage of the unit 13 (referred to as the second air supply passage).

The liquid inlet pipe group includes a liquid inlet pipe 31 and a plurality of liquid outlet pipes. The first end of the liquid inlet pipe 31 is used to communicate with the condenser 52 in the refrigeration system where the air suspension compressor 51 is located. The two ends are communicated with the first ends of the plurality of liquid outlet pipes, and the second ends of the plurality of liquid outlet pipes are respectively communicated with the plurality of electric heating units 11 . That is, the liquid inlet pipe 31 and one liquid outlet pipe constitute a liquid inlet passage corresponding to the electric heating unit 11 communicated with the one liquid outlet pipe. Optionally, the second ends of the plurality of liquid outlet pipes are respectively communicated with the liquid inlets 112 of the plurality of electric heating units 11 . By controlling the conduction or closing of the liquid inlet passage, the electric heating unit 11 and the condenser 52 are controlled to communicate or switch. As shown in FIG. 1 , the liquid inlet pipe 31 and the first liquid outlet pipe 32 constitute the liquid inlet passage (referred to as the first liquid inlet passage) of the first electric heating unit 12 , and the liquid inlet pipe 31 and the second liquid outlet pipe 33 constitute The liquid inlet passage of the second electric heating unit 13 (referred to as the second liquid inlet passage).

The communication pipe group includes a first side communication pipe 41 and a plurality of second side communication pipes. The first end of the first side communication pipe 41 is used to communicate with the evaporator 54 in the refrigeration system where the air suspension compressor 51 is located. The second ends of the side communication pipes 41 are communicated with the first ends of the plurality of second side communication pipes, and the second ends of the plurality of second side communication pipes are communicated with the plurality of electric heating units 11 respectively. That is, the first side communication pipe 41 and the one second side communication pipe constitute a communication passage corresponding to the electric heating unit 11 that communicates with the one second side communication pipe. Optionally, the second ends of the plurality of second side communication pipes are respectively communicated with the communication ports 113 of the plurality of electric heating units 11 . Optionally, valves are respectively provided on the plurality of second side communication pipes, that is, the communication or closing of each electric heating unit 11 and the condenser 52 can be controlled by controlling the valves. As shown in FIG. 1 , the first side communication pipe 41 and the first and second side communication pipes 42 constitute a communication passage (referred to as a first communication passage) of the first electric heating unit 12 , and the first side communication pipe 41 and the second The communication pipes 43 on both sides constitute a communication passage (referred to as a second communication passage) of the second electric heating unit 13 .

In the gas bearing air supply system of the embodiment of the present disclosure, the communication channels between the plurality of electric heating units 11 and the air supply ports 511 of the air suspension compressor 51 , the condenser 52 and the evaporator 54 are not limited to the aforementioned air supply pipe group, The structure of the liquid inlet pipe group and the communication pipe group can be any other pipe group structure that can realize the corresponding functions.

Optionally, the gas bearing gas supply system further includes a plurality of gas supply valves, a plurality of liquid inlet valves and a plurality of communication valves; The liquid inlet valves are respectively arranged on the plurality of liquid outlet pipes of the liquid inlet pipe group, and the plurality of communication valves are respectively arranged on the plurality of second side communication pipes of the communication pipe group. Each air supply valve can control the conduction or closing of the air supply passage, each liquid inlet valve can control the conduction or closing of the liquid inlet passage, and each communication valve can control the conduction or closing of the communication passage. closure.

In the gas bearing air supply system shown in FIG. 1 , the first air supply valve 24 is arranged on the first air inlet pipe 22 of the first air supply passage; the second air supply valve 25 is arranged on the second air supply passage of the second air supply passage. on the intake pipe 23. The first liquid inlet valve 34 is disposed on the first liquid outlet pipe 32 of the first liquid inlet passage, and the second liquid inlet valve 35 is disposed on the second liquid outlet pipe 33 of the second liquid inlet passage. The first communication valve 44 is arranged on the first and second side communication pipes 42 of the first communication passage, and the second communication valve 45 is arranged on the second and second side communication pipes 43 of the second communication passage.

A filter device (not shown) may also be provided on each air supply passage, liquid inlet passage and communication passage of the gas bearing air supply system of the embodiment of the present disclosure to filter the refrigerant in the pipeline.

In the gas bearing gas supply system of the embodiment of the present disclosure, as shown in FIG. 2 , the electric heating unit 11 realizes the function of a gas supply tank, and the gas supply principle is: electric energy controls the heating device 114 in the electric heating unit 11 to heat up , heat the liquid refrigerant in the electric heating unit 11, make the refrigerant evaporate into high pressure gas, and discharge it from the air outlet 111 of the electric heating unit 11, and send it to the bearing gap of the air suspension compressor 51 through the air supply passage. The electric heating unit 11 generally includes a tank body, a heating device 114 and a filtering and removing device, etc. The tank body is provided with an air outlet 111 and a liquid inlet 112, and the air outlet 111 is generally arranged on the top or upper part of the tank body; the liquid inlet 112 It is generally arranged in the lower part of the tank and immersed in the liquid refrigerant in the tank. The electric heating unit 11 is provided with a maximum liquid level line to control the amount of liquid refrigerant in the electric heating unit 11 to ensure the heating effect. Of course, the electric heating unit 11 is also provided with detection devices such as a temperature detection device 115 (for example, a temperature sensor) and a pressure detection device 116 (for example, a pressure sensor) to detect the temperature and pressure in the electric heating unit 11, and a safety valve 117, etc. components to assist the air supply stability of the electric heating unit 11 .

In the embodiment of the present disclosure, the tank body of the electric heating unit 11 is further provided with a communication port 113 for communicating with the low pressure side of the refrigeration system where the air suspension compressor is located, for example, communicating with the evaporator 54. When both the liquid inlet passage and the communication passage of the electric heating unit 11 are connected, the liquid inlet 112 side of the electric heating unit 11 is the high pressure side, and the communication port 113 side is the low pressure side. The liquid refrigerant in the heater 52 flows into the electric heating unit 11 to realize automatic liquid replenishment. In some embodiments, the position of the communication port 113 of the electric heating unit 11 is higher than the maximum liquid level line of the electric heating unit 11 . That is, the connection position (communication port 113 ) of the electric heating unit 11 and the communication passage is higher than the maximum liquid level line of the electric heating unit 11 . The communication port 113 will not be submerged by the liquid refrigerant in the electric heating unit 11 , so the liquid refrigerant in the electric heating unit 11 will not flow out from the communication port 113 , so as to ensure the quick and effective completion of the liquid replenishment.

In some embodiments, the gas bearing air supply system further includes a liquid level detection device 118 , which is disposed on the electric heating unit 11 and is used to obtain the liquid level value of the liquid refrigerant in the electric heating unit 11 . The liquid level value obtained by the liquid level detection device 118 controls the electric heating unit 11 to enter the gas supply state or the ready state; Fluid control. Optionally, the liquid level detection device 118 may be a liquid level gauge, a liquid level sensor or the like.

In the embodiment of the present disclosure, the structural form of the plurality of electric heating units 11 is not limited, and the plurality of electric heating units 11 may be arranged separately and independently, or may be arranged in connection.

Optionally, a plurality of electric heating units 11 are provided independently. Two independently arranged electric heating units as described in Figure 1. That is, an electric heating unit 11 is an electric heating tank.

Optionally, a plurality of electric heating units 11 are connected to form an integral electric heating device. For example, an integral electric heating device includes a plurality of independent heating chambers, one heating chamber as an electric heating unit.

With reference to FIG. 3 , an embodiment of the present disclosure provides a method for controlling a gas bearing gas supply system, wherein the gas bearing gas supply system is the aforementioned gas bearing gas supply system. control methods, including:

S110. When the first liquid level value of the electric heating unit in the gas supply state reaches the first preset value, switch the electric heating unit in the preparation state to the gas supply state, and switch the electric heating unit in the gas supply state Switch to ready state.

In this step S110, the first preset value may be a numerical value or a range. Optionally, if the first preset value is a first preset value, the switching control is performed when the first liquid level value of the electric heating unit in the gas supply state is equal to or lower than the first preset value. Optionally, if the first preset value is a first preset range, the switching control is performed when the first liquid level value of the electric heating unit in the gas supply state enters the first preset range.

Wherein, the setting of the first preset value may be determined according to the lowest liquid level of the electric heating unit. It can be a level value above the minimum level, or it can be a level range above the minimum level. The first preset value may also be determined according to ensuring a fast and effective fluid replacement effect. For example, the first preset value may be determined in the range of one quarter to one half of the volume of the electric heating unit. Not limited. As long as the determination of the first preset value can reach the determination that the electric heating unit in the gas supply state needs to be supplemented with liquid refrigerant.

Wherein, the first liquid level value may be acquired by the liquid level detection device 118 provided on the electric heating unit 11, for example, a liquid level gauge.

In this step S110, the switching operations of switching the electric heating unit in the standby state to the gas supply state and switching the electric heating unit in the gas supply state to the standby state may be performed simultaneously. When it is not carried out at the same time, firstly, the electric heating unit in the ready state is switched to the gas supply state, and then the electric heating unit in the gas supply state is switched to the standby state.

The electric heating unit in the standby state is switched to the gas supply state, specifically, the air supply passage of the electric heating unit in the standby state is switched from off to on, and heating of the electric heating unit is started. The electric heating unit in the air supply state is switched to the ready state, specifically, the air supply passage of the electric heating unit in the air supply state is switched from on to off, and the heating of the electric heating unit is stopped.

In this step S110, when there are a plurality of electric heating units in the ready state, the electric heating units in the ready state that meet the set rule may be switched to the gas supply state according to the set rule. Optionally, the multiple electric heating units in the air supply system are numbered in sequence, and the number i behind the number i of the electric heating unit in the air supply state is one or more from i+1 to number i+n. The electric heating unit in the ready state is switched to the air supply state. i is a natural number, and n is a natural number greater than or equal to 1.

For example, the gas supply system includes three electric heating units numbered 1, 2 and 3; when tank 1 is in the gas supply state and the switching conditions are met, switch tank 2 (or tank 2 and tank 3) to the gas supply state .

Of course, the setting rules are not limited to the numbers listed above, and other applicable rules are acceptable.

S120. When the second liquid level value of the electric heating unit in the ready state reaches the first preset value, control the liquid inlet path of the electric heating unit in the ready state to conduct, and the communication path of the electric heating unit in the ready state on.

In this step S120, the first preset value is the same as that in the foregoing step S110, and details are not repeated here.

In this step S120, the electric heating unit that is in the ready state and the second liquid level value reaches the first preset value is generally the electric heating unit that has just been switched to the ready state in step S110. At this time, the liquid inlet channel and the communication channel of the electric heating unit are turned on to realize automatic liquid replenishment. That is, in the embodiment of the present disclosure, when the electric heating unit is in a ready state and the second liquid level value thereof reaches the first preset value, the liquid inlet passage and the communication passage of the electric heating unit are turned on to perform automatic liquid replenishment, In other states, both the liquid inlet passage and the communication passage of the electric heating unit are closed.

Wherein, the second liquid level value may be acquired by the liquid level detection device 118 provided on the electric heating unit 11, for example, a liquid level gauge.

S130. When the second liquid level value of the electric heating unit in the ready state reaches a second preset value, control the liquid inlet passage of the electric heating unit in the ready state to close, and the electric heating unit in the ready state The communication path of the heating unit is closed.

In this step S130, the setting of the second preset value may be determined according to the maximum liquid level value of the electric heating unit, and the second preset value may be the maximum liquid level value of the electric heating unit, or may be slightly lower than the maximum liquid level value of the electric heating unit. level value. Not limited. That is, when the liquid level in the electric heating unit in the ready state reaches or approaches the highest liquid level of the electric heating unit, it indicates that the liquid replenishment is in place, and the liquid inlet channel and the communication channel of the electric heating unit can be closed.

In the embodiment of the present disclosure, the first preset value is smaller than the second preset value.

In some embodiments, step S110 specifically includes:

S111. When the first liquid level value of the electric heating unit in the gas supply state reaches the first preset value, control the electric heating unit in the ready state to start heating.

S112 , when the pressure in the electric heating unit in the standby state reaches the set air supply pressure, switch the electric heating unit in the standby state to the air supply state, and switch the electric heating unit in the air supply state to the standby state.

That is, when it is determined that the electric heating unit in the gas supply state needs to be supplemented with liquid refrigerant, the electric heating unit in the ready state is started to heat; and the gas pressure of the electric heating unit in the preparation state for starting the heating reaches the set gas supply pressure. , and then switch it to the air supply state. Ensure the stability of the air supply pressure. Wherein, the set air supply pressure can be determined according to the air pressure where the air bearing is located.

Wherein, the air supply pressure of the electric heating unit 11 may be acquired by the pressure detection device 116 provided on the electric heating unit 11, for example, a pressure gauge or the like.

In some embodiments, the control method further includes: when the pressure in the electric heating unit in the standby state is lower than the set air supply pressure, controlling the electric heating unit in the standby state to start heating. That is, it is ensured that the pressure in the electric heating unit in the standby state can always be guaranteed at the set air supply pressure, and the waiting time for switching the electric heating unit in the air supply state to the standby state is reduced. In this embodiment, logically, it must also include: when the pressure in the electric heating unit in the standby state reaches the set air supply pressure, controlling the electric heating unit in the standby state to stop heating.

In some embodiments, the control method further includes: acquiring liquid level values of a plurality of electric heating units when the gas bearing gas supply system is turned on for gas supply, and setting the electric heating unit whose liquid level value meets a set condition as an initial Electric heating unit for gas supply. Then the electric heating unit for the initial gas supply is the electric heating unit in the gas supply state, and the other electric heating units are the electric heating units in the preparation state.

In this embodiment, the setting condition may be that the liquid level value is greater than or equal to the third preset value, and the determination of the third preset value is based on the fact that the liquid refrigerant in the electric heating unit reaches a certain amount to ensure the air supply amount, for example , the third preset value is slightly lower than the maximum liquid level value of the electric heating unit.

Or, the setting condition is: after the liquid level values of the plurality of electric heating units are sorted from high to low, the electric heating unit is located at the first or the top of the ranking. Ensure that the liquid refrigerant in the electric heating unit for the first gas supply in this gas supply reaches a certain amount to ensure the gas supply effect.

Next, taking the gas bearing gas supply system shown in FIG. 1 as an example, the control method for the gas bearing gas supply system according to the embodiment of the present disclosure will be described. Before the gas supply system starts the gas supply, the first electric heating unit 12 ( The liquid refrigerant in the first electric heating tank) and the second electric heating unit 13 (the second electric heating tank) is full of liquid (ie, reaches the maximum liquid level line), and the first electric heating unit 12 is activated for the first time as the gas supply tank (ie, the first air supply valve 24 is open). Then, the control method of the embodiment of the present disclosure includes:

S210 , acquiring the first liquid level value of the first electric heating unit 12 .

S220. When the first liquid level value is lower than the first preset value, control the heating device 114 of the second electric heating unit 13 to start heating.

S230, when the pressure in the second electric heating unit 13 reaches the set air supply pressure, control the second air supply valve 25 to open, and switch the second electric heating unit 13 to the air supply state; control the first air supply valve 24 to close , the first electric heating unit 12 is switched to the ready state.

S240 , control the opening of the first liquid inlet valve 34 and the opening of the first communication valve 44 to make the first liquid inlet passage and the first communication passage of the first electric heating unit 12 conduct.

S250: Acquire the second liquid level value of the first electric heating unit 12, and when the second liquid level value of the first electric heating unit 12 reaches the second preset value, control the first liquid inlet valve 34 to close and the first communication valve 44 is closed, so that the first liquid inlet passage and the first communication passage of the first electric heating unit 12 are closed.

At this time, the first electric heating unit 12 is in a ready state, and the second electric heating unit 13 is in a gas supply state; then, steps S210 to S250 are repeated, and the first electric heating unit 12 and the second electric heating unit 13 are mutually can be replaced.

With reference to FIG. 4 , an embodiment of the present disclosure provides a control device for a gas bearing gas supply system, including a processor (processor) 100 and a memory (memory) 101. Optionally, the apparatus may further include a communication interface (Communication Interface) 102 and a bus 103 . The processor 100 , the communication interface 102 , and the memory 101 can communicate with each other through the bus 103 . Communication interface 102 may be used for information transfer. The processor 100 can invoke the logic instructions in the memory 101 to execute the control method for the gas bearing gas supply system of the above-mentioned embodiment.

In addition, the above-mentioned logic instructions in the memory 101 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.

As a computer-readable storage medium, the memory 101 can be used to store software programs and computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes the function application and data processing by executing the program instructions/modules stored in the memory 101 , that is, to implement the control method for the gas bearing gas supply system in the above-mentioned embodiment.

The memory 101 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. In addition, the memory 101 may include high-speed random access memory, and may also include non-volatile memory.

An embodiment of the present disclosure provides a refrigeration system, including the foregoing gas bearing air supply system; and the foregoing control device for the gas bearing air supply system.

The refrigeration system of the embodiment of the present disclosure, as shown in FIG. 1 , further includes an air suspension compressor 51 , a condenser 52 , a throttling device 53 and an evaporator 54 , which are connected in sequence to form a refrigeration cycle. There are also structural components such as check valves, flow control devices (electric ball valves), filters, and fluid monitoring devices on the pipelines of the refrigeration cycle.

In the refrigeration system of the embodiment of the present disclosure, in the gas bearing air supply system, the liquid replenishment of the electric heating unit is improved to use the pressure difference between the high pressure and the low pressure of the refrigeration system to automatically complete, omitting power equipment, such as a refrigerant pump, and solving the problem of refrigerant The reliability of the pump and the gas supply pressure fluctuation of the gas bearing are improved, and the reliability is improved; the high-cost refrigerant pump is omitted, the cost of the gas supply system is greatly reduced, and the economic burden of the consumer is reduced. Moreover, the uninterrupted and stable air supply of the gas bearing air supply system improves the stability of the refrigeration system and enhances the user experience.

In the embodiment of the present disclosure, the refrigeration system may be any chiller system using the air suspension compressor 51 , an air-conditioning system, or a refrigeration system of a refrigerator.

Embodiments of the present disclosure provide a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned control method for a gas bearing gas supply system.

Embodiments of the present disclosure provide a computer program product, where the computer program product includes a computer program stored on a computer-readable storage medium, and the computer program includes program instructions that, when executed by a computer, cause all The computer executes the above-described control method for a gas bearing gas supply system.

The above-mentioned computer-readable storage medium may be a transient computer-readable storage medium, and may also be a non-transitory computer-readable storage medium.

The technical solutions of the embodiments of the present disclosure may be embodied in the form of software products, and the computer software products are stored in a storage medium and include one or more instructions to enable a computer device (which may be a personal computer, a server, or a network equipment, etc.) to execute all or part of the steps of the methods described in the embodiments of the present disclosure. The aforementioned storage medium can be a non-transitory storage medium, including: U disk, removable hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, etc. A medium that can store program codes, and can also be a transient storage medium.

The foregoing description and drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, process, and other changes. The examples represent only possible variations. Unless expressly required, individual components and functions are optional and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. Also, the terms used in this application are used to describe the embodiments only and not to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a" (a), "an" (an) and "the" (the) are intended to include the plural forms as well, unless the context clearly dictates otherwise. . Similarly, the term "and/or" as used in this application is meant to include any and all possible combinations of one or more of the associated listings. Additionally, when used in this application, the term "comprise" and its variations "comprises" and/or including and/or the like refer to stated features, integers, steps, operations, elements, and/or The presence of a component does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groupings of these. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, or device that includes the element. Herein, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, reference may be made to the description of the method section for relevant parts.

Those skilled in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. Skilled artisans may use different methods for implementing the described functionality for each particular application, but such implementations should not be considered beyond the scope of the disclosed embodiments. The skilled person can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units can refer to the corresponding processes in the foregoing method embodiments, and details are not repeated here.

In the embodiments disclosed herein, the disclosed methods and products (including but not limited to apparatuses, devices, etc.) may be implemented in other ways. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units may only be a logical function division. In actual implementation, there may be other division methods, for example, multiple units or components may be combined Either it can be integrated into another system, or some features can be omitted, or not implemented. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. This embodiment may be implemented by selecting some or all of the units according to actual needs. In addition, each functional unit in the embodiment of the present disclosure may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

The flowchart and block diagrams in the Figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code that contains one or more functions for implementing the specified logical function(s) executable instructions. In some alternative implementations, the functions noted in the blocks may occur out of the order noted in the figures. For example, two blocks in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, operations or steps corresponding to different blocks may also occur in different sequences than those disclosed in the description, and sometimes there is no specific relationship between different operations or steps. order. For example, two consecutive operations or steps may, in fact, be performed substantially concurrently, or they may sometimes be performed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented in special purpose hardware-based systems that perform the specified functions or actions, or special purpose hardware implemented in combination with computer instructions.

Claims (10)

A gas bearing air supply system, characterized in that it is used for a gas suspension compressor; the gas bearing air supply system includes: A plurality of electric heating units, each electric heating unit communicates with the air supply port of the air suspension compressor through an air supply passage, and each electric heating unit communicates with the high pressure of the refrigeration system where the air suspension compressor is located through a liquid inlet passage side communication, each of the electric heating units communicates with the low pressure side of the refrigeration system where the air suspension compressor is located through a communication passage; By controlling the conduction or closing of the air supply passage of the electric heating unit, the electric heating unit enters the air supply state or the preparation state; The liquid replenishment of the electric heating unit is realized by controlling the conduction of the liquid inlet passage and the communication passage of the electric heating unit. The gas bearing air supply system of claim 1, further comprising: A plurality of valves are respectively arranged on the air supply passages, the liquid inlet passages and the communication passages of the plurality of electric heating units. The gas bearing gas supply system according to claim 1 or 2, further comprising: one or more of a gas supply pipe group, a liquid inlet pipe group and a communication pipe group; The air supply pipe group includes an air supply pipe and a plurality of air inlet pipes, the first end of the air supply pipe is used to communicate with the air supply port of the air suspension compressor, and the second end of the air supply pipe is connected to the plurality of air inlet pipes. The first ends of the air pipes are communicated with each other, and the second ends of the plurality of air intake pipes are respectively communicated with the plurality of the electric heating units; The liquid inlet pipe group includes a liquid inlet pipe and a plurality of liquid outlet pipes. The first end of the liquid inlet pipe is used to communicate with the condenser in the refrigeration system where the air suspension compressor is located. The second end is communicated with the first ends of the plurality of liquid outlet pipes, and the second ends of the plurality of liquid outlet pipes are respectively communicated with the plurality of the electric heating units; The communicating pipe group includes a first side communicating pipe and a plurality of second side communicating pipes, the first end of the first side communicating pipe is used for communicating with the evaporator in the refrigeration system where the air suspension compressor is located, and the The second ends of the first side communication pipes are communicated with the first ends of the plurality of second side communication pipes, and the second ends of the plurality of second side communication pipes are respectively communicated with the plurality of the electric heating units. The gas bearing air supply system according to claim 1 or 2, characterized in that: The connection position of the electric heating unit and the communication passage is higher than the maximum liquid level line of the electric heating unit. The gas bearing gas supply system according to claim 1 or 2, characterized in that, further comprising: The liquid level detection device is arranged on the electric heating unit and is used for acquiring the liquid level value of the liquid refrigerant in the electric heating unit. A control method for a gas bearing gas supply system, wherein the gas bearing gas supply system is the gas bearing gas supply system according to any one of claims 1 to 5; the control method comprises: : When the first liquid level value of the electric heating unit in the gas supply state reaches the first preset value, the electric heating unit in the ready state is switched to the gas supply state, and the electric heating unit in the gas supply state is switched to the gas supply state. switch to ready state; When the second liquid level value of the electric heating unit in the ready state reaches the first preset value, control the liquid inlet passage of the electric heating unit in the ready state to conduct, and the electric heating unit in the ready state The communication path is turned on; When the second liquid level value of the electric heating unit in the ready state reaches the second preset value, the liquid inlet passage of the electric heating unit in the ready state is controlled to be closed, and the electric heating unit in the ready state is controlled to be closed. The communication channel is closed. The control method according to claim 6, wherein when the first liquid level value of the electric heating unit in the gas supply state reaches the first preset value, the electric heating unit in the ready state is switched For the gas supply state, switching the electric heating unit in the gas supply state to the ready state, including: When the first liquid level value of the electric heating unit in the gas supply state reaches the first preset value, controlling the electric heating unit in the ready state to start heating; When the pressure in the electric heating unit in the standby state reaches the set air supply pressure, the electric heating unit in the standby state is switched to the air supply state, and the electric heating unit in the air supply state is switched to ready state. The control method according to claim 6 or 7, characterized in that, further comprising: When the pressure in the electric heating unit in the ready state is lower than the set air supply pressure, the electric heating unit in the ready state is controlled to start heating. A control device for a gas bearing air supply system, comprising a processor and a memory storing program instructions, wherein the processor is configured to execute the program instructions according to claims 6 and 7 when executing the program instructions Or the control method described in 8 for a gas bearing gas supply system. A refrigeration system, characterized by comprising the gas bearing air supply system as claimed in any one of claims 1 to 4; and the control device for the gas bearing air supply system as claimed in claim 9.

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