CN217287846U

CN217287846U - Air drying device for electric compressor and vehicle

Info

Publication number: CN217287846U
Application number: CN202220434368.9U
Authority: CN
Inventors: 马加什·克拉波特; 傅直全; 刘旺昌; 俞碧君
Original assignee: Zhejiang VIE Science and Technology Co Ltd
Current assignee: Zhejiang VIE Science and Technology Co Ltd
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-08-26
Anticipated expiration: 2032-02-28

Abstract

The utility model relates to an air drying field, which is used for an air drying device and a vehicle of an electric compressor, a control unit is used for being electrically connected with an air compressor and a regeneration system, the control unit controls the working mode of the air drying device by controlling the start and stop of the air compressor and the regeneration system, and when the regeneration system is started, the control unit controls the air compressor to be closed; the regeneration system comprises a regeneration loop, the regeneration loop comprises a throttle valve, a regeneration check valve and a control electromagnetic valve which are sequentially connected in series, the regeneration loop is connected with the main check valve in parallel, the outlet of the throttle valve is connected with the inlet end of the main check valve, and the inlet end of the electromagnetic valve is connected with the outlet end of the main check valve; the electromagnetic valve is in a power-off state, and the regeneration loop is disconnected; when the regeneration system is started, the electromagnetic valve is in a power-on state, the regeneration loop is communicated, and compressed air at the air outlet is blown back to the filter element through the electromagnetic valve of the regeneration loop, the regeneration check valve and the throttle valve and finally discharged from the unloading valve. The device has the advantages of good economy, simple control and the like.

Description

Air drying device for electric compressor and vehicle

Technical Field

The utility model relates to an air drying device field has especially related to air drying device and vehicle for electric compressor.

Background

The air dryer described in WO2020074245a1 has a cost disadvantage in the case of an electrically controlled air compressor, since it has an additional 3/2 solenoid valve to generate a pneumatic control signal, which is not necessary in the case of an electrically controlled air compressor.

The same applies to the air dryers described in DE102010018949a1, EP2719595a1, DE102007013671a 1.

The invention described in CN112124283A reduces cost by eliminating the pneumatic control port and corresponding solenoid valve, but it uses 3/2 solenoid valve, which is less cost effective and has a reduced service life compared to 2/2 solenoid valve.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model discloses a following technical scheme can solve:

the air drying device for the electric compressor comprises a control unit, a filter element, an unloading valve, a main check valve and a regeneration system, wherein the unloading valve is closed in a working state, and is opened in a regeneration state;

the control unit is used for being electrically connected with the air compressor and the regeneration system, the control unit controls the working mode of the air drying device by controlling the starting and stopping of the air compressor and the regeneration system, and when the regeneration system is started, the control unit controls the air compressor to be closed;

the regeneration system comprises a regeneration loop, the regeneration loop comprises a throttle valve, a regeneration check valve and a control electromagnetic valve which are sequentially connected in series, the regeneration loop is connected with the main check valve in parallel, the outlet of the throttle valve is connected with the inlet end of the main check valve, and the inlet end of the electromagnetic valve is connected with the outlet end of the main check valve;

the electromagnetic valve is in a power-off state, and the regeneration loop is disconnected; when the regeneration system is started, the electromagnetic valve is in a power-on state, the regeneration loop is communicated, and compressed air at the air outlet is blown back to the filter element through the electromagnetic valve of the regeneration loop, the regeneration check valve and the throttle valve and finally discharged from the unloading valve.

Preferably, the unloading valve comprises a pilot valve, the outlet end of the electromagnetic valve is connected with a control air passage in parallel and communicated with the pilot valve, and the electromagnetic valve controls the opening and closing of the unloading valve by controlling the opening of the pilot valve.

Preferably, the solenoid valve is a two-position two-way normally closed solenoid valve.

Preferably, the filter element integrates drying and filtering functions.

Preferably, the air drying device has an integrated structure.

A vehicle equipped with the air drying device for an electric compressor described above.

Through the technical scheme, the utility model discloses following technological effect has:

the present invention provides a compressed air system for commercial vehicles and a strategy for controlling the same, which is safe to operate for electronic air compressors and which controls the pressure swing adsorption process in an economical manner.

Drawings

FIG. 1 is a gas path control diagram of the device.

The reference numerals in the figures are the following technical names:

1-compressed air inlet, 2-compressed air outlet, 3-exhaust outlet, 4-filter element, 5-throttle valve, 6-unloading valve, 7-control unit, 8-electronic signal, 9-main check valve, 10-electromagnetic valve, 11-compressor, 12-pipeline, 13-regeneration check valve.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Example 1

Compressed air consumers of commercial vehicles require clean and dry compressed air. One practical method of removing moisture from compressed air is the so-called pressure swing adsorption process. Compressed air supplied by an air compressor 11 passes through an air dryer cartridge 4, which is filled with a porous material, known as desiccant. During the passage of air through the dryer cartridge 4, water molecules become trapped in the pores of the desiccant and the relative humidity of the compressed air is reduced. This phase is called the load phase. After the compressor 11 completes the air transportation, it is necessary to remove the water molecules trapped in the desiccant. This is achieved by expanding a part of the compressed and dried air by means of the throttle valve 5. The relative humidity of the already dried air drops sharply due to the pressure drop of the compressed air. This extremely dry air is directed into the dryer cartridge 4, carrying the trapped air molecules away from the desiccant, and discharged to the environment through the unloader valve 6. This is the regeneration phase of the air dryer. After the regeneration phase has been completed, the air dryer switches to a so-called lock-up phase if there is no need to supply more compressed air to the air consumer. During the regeneration and lock-up phase, the air compressor is turned off by an electronic signal 8 provided by an internal or separate electronic control unit 7.

The scheme realizes the basic functions through means:

an air drying device for an electric compressor 11 comprises a control unit 7, a filter element 4, an unloading valve 6, a main check valve 9 and a regeneration system, wherein the unloading valve 6 is closed in a working state, and the unloading valve 6 is opened in a regeneration state;

the control unit 7 is used for being electrically connected with the air compressor and the regeneration system, the control unit 7 controls the working mode of the air drying device by controlling the starting and stopping of the air compressor and the regeneration system, and when the regeneration system is started, the control unit 7 controls the air compressor to be closed;

the regeneration system comprises a regeneration loop, the regeneration loop comprises a throttle valve 5, a regeneration check valve 13 and a control electromagnetic valve 10 which are sequentially connected in series, the regeneration loop is connected with a main check valve 9 in parallel, the outlet of the throttle valve 5 is connected with the inlet end of the main check valve 9, and the inlet end of the electromagnetic valve 10 is connected with the outlet end of the main check valve 9;

the electromagnetic valve 10 is in a power-off state, and the regeneration loop is disconnected; when the regeneration system is started, the electromagnetic valve 10 is in a power-on state and the regeneration loop is communicated, and compressed air at the air outlet is blown back to the filter element 4 through the electromagnetic valve 10 of the regeneration loop, the regeneration check valve 13 and the throttle valve 5 and is finally discharged from the unloading valve 6.

The working process is as follows:

compressed air is received from the air compressor 7 at the same or a separate electronic connection 8 as the air compressor 11. If the received pressure value is lower than the actually defined or calculated minimum pressure value, the electronic control unit 7 sends an electronic signal 8 to let the air compressor start delivering air. The compressed air passes through the air dryer cartridge 4 and the clean compressed air opens the main check valve 9 and exits the apparatus at the air outlet 2.

Filter cartridge regeneration 4: to regenerate the filter cartridge 4, an electrical signal 8 is first sent to the compressor to stop the air delivery. The solenoid valve 10 is then actuated 2/2 to allow compressed air to flow from the outlet port 2 to the control line of the unloader valve 6 bypassing the main check valve 9. The unloader valve 6 opens and the pressure between the main check valve 9 and the air compressor 11 is vented to the environment. The control line of the unloading valve 6 is connected to a regeneration check valve 13. As the pressure drops below the regeneration check valve 13, it opens allowing compressed air to flow through the regeneration throttle valve 5 and through the air dryer cartridge 4. The regeneration check valve 13 opens due to the drop in pressure below and allows compressed air to flow through the regeneration throttle 5 and through the air dryer cartridge 4. 2/2 the solenoid valve 10 is used to provide more compressed air than the flow through the regeneration throttle 5, so the pressure level in the control line of the unloader valve 6 is always maintained at a sufficiently high level to keep the unloader valve 6 open. In practice, the 2/2 solenoid valve 10 has a larger effective flow cross section than the regenerative throttle valve 5. To stop the regeneration flow, the electronic control unit 7 deactivates 2/2 the solenoid valve 10, blocking the flow from the outlet 2 to the unloading valve 6. The compressed air is discharged from the control pipeline of the unloading valve 6, the air outlet 3 is closed, and the air dryer can carry out the next round of load.

In this scheme, the off-load valve includes the pilot valve, and the exit end of solenoid valve is parallelly connected to have control gas circuit and pilot valve intercommunication, and the solenoid valve is through the switching of opening control off-load valve of control pilot valve. The electromagnetic valve is a normally closed electromagnetic valve with two positions and two ways.

The present invention provides a compressed air system for commercial vehicles and a strategy for controlling the compressed air system, which is safe to operate for electronic air compressors and which enables the pressure swing adsorption process to be controlled in an economical manner. The present invention relates to an air dryer device, primarily for a vehicle. The air dryer device comprises a compressed air inlet 1 connected to an air compressor 11 via a line 12, a compressed air outlet 2 for supplying compressed air consumers, and an exhaust air outlet 3 connected to the environment. The air dryer apparatus also includes a valve that regulates the flow of air through the air dryer cartridge 4 based on the actual stage of pressure swing adsorption. The valves are arranged so that the air dryer can control the pressure swing adsorption process if the connected air compressor is controlled by a non-pneumatic signal (primarily an electrical signal).

Example 2

This embodiment is different from embodiment 1 in that: the air drying device is of an integrated structure.

Example 3

This embodiment is different from embodiment 1 in that: the filter element integrates drying and filtering functions.

Example 4

A vehicle equipped with the above-described air drying device for the electric compressor 11.

Claims

1. Air drying device for an electric compressor, characterized in that: the device comprises a control unit (7), a filter element (4), an unloading valve (6), a main check valve (9) and a regeneration system, wherein the unloading valve (6) is closed in a working state, and the unloading valve (6) is opened in a regeneration state;

the control unit (7) is used for being electrically connected with the air compressor and the regeneration system, the control unit (7) controls the working mode of the air drying device by controlling the starting and stopping of the air compressor and the regeneration system, and when the regeneration system is started, the control unit (7) controls the air compressor to be closed;

the regeneration system comprises a regeneration loop, the regeneration loop comprises a throttle valve (5), a regeneration check valve (13) and a control electromagnetic valve (10) which are sequentially connected in series, the regeneration loop is connected with a main check valve (9) in parallel, an outlet of the throttle valve (5) is connected with an inlet end of the main check valve (9), and an inlet end of the electromagnetic valve (10) is connected with an outlet end of the main check valve (9);

the electromagnetic valve (10) is in a power-off state, and the regeneration loop is disconnected; when the regeneration system is started, the electromagnetic valve (10) is in a power-on state and the regeneration loop is communicated, and compressed air at the air outlet is blown back to the filter element (4) through the regeneration loop electromagnetic valve (10), the regeneration check valve (13) and the throttle valve (5) and is finally discharged from the unloading valve (6).

2. The air drying device for an electric compressor according to claim 1, wherein: the unloading valve (6) comprises a pilot valve, a control air path is connected in parallel with the outlet end of the electromagnetic valve (10) and communicated with the pilot valve, and the electromagnetic valve (10) controls the opening and closing of the unloading valve (6) by controlling the opening of the pilot valve.

3. The air drying device for an electric compressor according to claim 2, wherein: the electromagnetic valve (10) is a two-position two-way normally closed electromagnetic valve (10).

4. The air drying device for an electric compressor according to claim 2, wherein: the filter element (4) integrates drying and filtering functions.

5. The air drying device for an electric compressor according to any one of claims 1 to 4, wherein: the air drying device is of an integrated structure.

6. A vehicle, characterized in that: an air drying device for an electric compressor equipped with the air drying device according to any one of claims 1 to 5.