KR102440519B1 - Damage prevention apparatus of air conditioner compressor clutch of vehicle and control method thereof - Google Patents

Abstract

Disclosed are an apparatus for preventing damage of an air conditioner compressor clutch for a vehicle and a method for controlling the same. An apparatus for preventing damage to an air conditioner compressor clutch for a vehicle and a control method therefor according to an embodiment of the present invention include a refrigerant pressure switch for measuring a refrigerant pressure in an air conditioner system of a vehicle including a compressor, a condenser, an expansion valve and an evaporator ; An operation detection device for detecting an operating state of a cooling fan mounted on one side of a condenser that receives and liquefies the compressed refrigerant from the compressor, and receives a signal from the refrigerant pressure switch and the operation detection sensor to control the operation of the clutch of the compressor It is configured to include a control unit for controlling the solenoid valve.

Description

A device for preventing damage to an air conditioner compressor clutch in a vehicle and its control method {DAMAGE PREVENTION APPARATUS OF AIR CONDITIONER COMPRESSOR CLUTCH OF VEHICLE AND CONTROL METHOD THEREOF}

The present invention relates to an apparatus for preventing damage to an air conditioner compressor clutch in a vehicle and a control method thereof, and more particularly, to an air conditioner for a vehicle that can solve a problem in which the clutch on/off is continuously operated due to the non-operation of the condenser fan, thereby solving the problem of deterioration and seizure of the compressor clutch It relates to a compressor clutch damage prevention device and a control method therefor.

In general, the engine that generates the power of the vehicle not only generates the driving force of the vehicle, but also uses the rotational force due to the explosion of the piston to charge the electric components of the vehicle, that is, power steering using air conditioner or hydraulic pressure, the brake and clutch, as well as the battery. will generate power.

The vehicle is provided with an air conditioner including an air conditioner, a heater, a ventilation system for circulating cool and warm air between the air conditioner and the heater in the vehicle, and a blower assembly for supplying air to the ventilation system for cooling and heating. .

Here, the air conditioner installed in the vehicle is a device for lowering the temperature of the air inside the vehicle in order to provide a comfortable environment to the passengers regardless of the outside temperature in summer, and the operating principle is as follows.

1 is a schematic diagram of a conventional air conditioner for a vehicle, and FIG. 2 is a schematic diagram illustrating an operation structure of a conventional refrigerant pressure switch and a warning lamp.

1 and 2 together, the refrigerant is sucked and compressed by the compressor driven by the rotational force of the crankshaft of the engine to become a high-temperature and high-pressure gaseous state, and the gaseous refrigerant is sent to the condenser.

This refrigerant is converted into a high-temperature and high-pressure liquid in the condenser by the radiator fan, enters the receiver driver to remove moisture and dust, and then enters the expansion valve to expand the high-temperature and high-pressure liquid refrigerant. state and enters the evaporator.

The refrigerant in the evaporator takes heat from the surrounding air and changes from a liquid state to a gaseous state of low temperature and low pressure.

Here, the on condition of the refrigerant pressure switch is turned on when the refrigerant pressure is higher than a predetermined pressure, and when the refrigerant pressure switch is turned on, the warning lamp is also turned on.

According to this operating principle and configuration, when the air conditioner is turned on through the controller when the air conditioner is operated, the compressor clutch is attached and it is made into a high-temperature and high-pressure liquid through the compressor and condenser. It is taken away and introduced into the vehicle as cool wind.

However, the air conditioner according to the prior art has a problem in that the clutch on/off is continuously operated due to the non-operation of the condenser cooling fan even though the refrigerant liquid compression problem is not a problem in that the compressor clutch deteriorates and ignites.

Republic of Korea Patent Application No. 10-2005-0023957

In one embodiment of the present invention, in order to overcome the problems of the prior art, the clutch is turned off when the refrigerant pressure is high when the air conditioner is used, and the clutch is turned off if the condenser fan does not operate when the refrigerant pressure is normal, so that the clutch deterioration is extinguished. An object of the present invention is to provide a vehicle air conditioner compressor clutch damage prevention device and control method that can increase lifespan and improve performance by preventing

According to one aspect of the present invention, there is provided an air conditioner system for a vehicle comprising a compressor, a condenser, an expansion valve and an evaporator, comprising: a refrigerant pressure switch for measuring a refrigerant pressure; An operation detection device for detecting an operating state of a cooling fan mounted on one side of a condenser that receives and liquefies the compressed refrigerant from the compressor, and receives a signal from the refrigerant pressure switch and the operation detection sensor to control the operation of the clutch of the compressor It may include a control unit for controlling the solenoid valve.

The refrigerant pressure switch may be turned on when the pressure is greater than or equal to a predetermined pressure.

The device for preventing damage to the air conditioner compressor clutch of the vehicle may further include a warning lamp.

The warning lamp may be operated in conjunction with a refrigerant pressure switch.

The operation sensing device may include a rotating body, which is a part to be sensed, and a detection sensor for detecting the rotation of the rotating body.

The rotating body may have a shape in which convex parts and concave parts are alternated.

The rotating body may have a structure mounted on the rotating shaft of the condenser cooling fan.

The detection sensor may have a structure in which a magnet is built-in.

The detection sensor may determine whether the condenser cooling fan operates with a magnetic field generated by the rotation of the rotating body.

The refrigerant pressure switch may be turned on when the pressure is greater than 32 kgf/cm ² .

According to another aspect of the present invention, there is provided a control method of an apparatus for preventing damage to an air conditioner compressor clutch in a vehicle according to the present invention, comprising the steps of: (a) operating an air conditioner switch, (b) determining whether a refrigerant pressure is normal in a control unit; (c) detecting normal operation of the condenser cooling fan when the refrigerant pressure is normal, and (d) blocking power transmission from the compressor clutch in the control unit when the condenser cooling fan does not operate normally. .

In step (b), when the refrigerant pressure is abnormal, the control unit may turn on the refrigerant pressure switch.

When the refrigerant pressure switch is turned on, the control unit may turn on the warning lamp.

In step (d), when the condenser cooling fan does not operate normally, the control unit may turn on the warning lamp.

When the warning lamp is turned on, the control unit may block power transmission from the compressor clutch.

In step (c), when the warning lamp is turned on, the control unit may determine whether the number of on/off of the condenser cooling fan is a predetermined number or more.

When the number of on/off of the cooling fan is equal to or greater than a predetermined number, the control unit may block power transmission from the compressor clutch.

According to one embodiment of the present invention, in the vehicle air conditioner compressor clutch damage prevention device and control method, the clutch on/off is continuously operated due to the non-operation of the condenser cooling fan even though the refrigerant liquid compression problem is not a problem, so that the compressor clutch deteriorates and burns. It can provide the effect of preventing the occurrence of life extension and improving quality.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows the structure of the conventional air conditioner.
2 is a schematic diagram showing the operation structure of a conventional refrigerant pressure switch and warning lamp.
3 is a flowchart of a conventional air conditioner controller control unit.
4 is a schematic diagram illustrating the configuration of an air conditioner compressor clutch damage prevention device for a vehicle according to an embodiment of the present invention.
5 is a schematic diagram illustrating a control unit of an air conditioner compressor clutch damage prevention device for a vehicle according to an embodiment of the present invention.
6 is a schematic diagram of a condenser cooling fan of an apparatus for preventing damage to an air conditioner compressor clutch of a vehicle according to an embodiment of the present invention.
7 is a schematic diagram of an operation detecting device of an air conditioner compressor clutch damage prevention device of a vehicle according to an exemplary embodiment of the present invention of FIG. 6 .
8 is a perspective view illustrating an operation detecting device of an air conditioner compressor clutch damage prevention device of a vehicle according to an exemplary embodiment of the present invention of FIG. 6 .
9 is a schematic diagram illustrating a principle of a motion sensing device according to an embodiment of the present invention of FIG. 6 .
10 is a schematic diagram illustrating a flow chart of a control method of an apparatus for preventing damage of an air conditioner compressor clutch in a vehicle according to an exemplary embodiment of the present invention.
11 is a schematic diagram illustrating a flowchart of another control method of an apparatus for preventing damage to an air conditioner compressor clutch in a vehicle according to another embodiment of the present invention.

The embodiments described below are provided so that those skilled in the art can easily understand the technical spirit of the present invention, and the present invention is not limited thereto. In addition, the matters expressed in the accompanying drawings may be different from the forms actually implemented in the drawings schematically for easy explanation of the embodiments of the present invention.

When a component is referred to as being connected or connected to another component, it may be directly connected or connected to the other component, but it should be understood that another component may exist in between.

And, "connection" herein includes direct connection and indirect connection between one member and another member, and may mean all physical connections such as adhesion, attachment, fastening, bonding, and bonding.

In addition, expressions such as 'first, second', etc. are used only for distinguishing a plurality of components, and do not limit the order or other characteristics between the components.

The singular expression includes the plural expression unless the context clearly dictates otherwise. Terms such as "comprises" or "having" are intended to mean that a feature, number, step, action, component, part, or combination thereof described in the specification exists, and one or more other features or numbers, It may be construed that steps, operations, components, parts, or combinations thereof may be added.

4 is a schematic diagram showing the configuration of an apparatus for preventing damage to an air conditioner compressor clutch for a vehicle according to an embodiment of the present invention, and FIG. It is a schematic diagram showing

4 and 5 together, the refrigerant is sucked and compressed by the compressor driven by the rotational force of the crankshaft of the engine to become a high-temperature and high-pressure gaseous state and sent to the condenser.

The sent refrigerant is converted into a high-temperature and high-pressure liquid state by the radiator fan from the condenser, enters the receiver driver, and expands.

At this time, the refrigerant takes heat from the surrounding air and changes from a liquid state to a gaseous state of low temperature and low pressure.

Specifically, a compressor receiving the rotational force transmitted from the pulley installed on the crankshaft of the engine and compressing the refrigerant, and receiving the refrigerant in a high-pressure gaseous state from the compressor and condensing it into a high-pressure liquid state, the condenser is provided with a fan operation detection device an orifice for converting the high-pressure liquid refrigerant from the condenser into a low-pressure liquid state; , is composed of an accumulator that receives a mixture of a low-pressure liquid state and a gaseous state flowing out of the evaporator and returns only the gaseous refrigerant back to the compressor.

Here, the control unit 130 is configured to receive a signal from the refrigerant pressure switch 110 and the operation detection sensor to control the solenoid valve that controls the operation of the clutch of the compressor.

In addition, the device for preventing damage to the air conditioner compressor clutch of the vehicle is configured to further include a warning lamp 140 so that the control unit 130 operates the warning lamp 140 in conjunction with the refrigerant pressure switch 110 to control the operation.

6 is a schematic diagram illustrating a condenser cooling fan of an apparatus for preventing damage to an air conditioner compressor clutch of a vehicle according to an embodiment of the present invention, and FIG. It is a plan view of the operation detection device of the prevention device, FIG. 8 is a perspective view illustrating the operation detection device of the device for preventing damage to the air conditioner compressor clutch of a vehicle according to an embodiment of the present invention of FIG. 6 , and FIG. 9 is the present invention of FIG. It is a schematic diagram showing the principle of the operation detection device according to an embodiment of the.

When the configuration of the operation detection device according to an embodiment of the present invention will be described in detail with reference to FIGS. 6 to 9 , the operation detection device 120 includes a rotating body 122 that is a part to be detected and a rotation body that is the part to be detected. It is configured to include a detection sensor 126 that detects the rotation of the whole 122 .

The rotating body 122 as the sensing target has an alternating shape of convex parts 123 and concave parts 124 and is mounted on the rotating shaft of the housing of the condenser cooling fan. In addition, a magnet 127 is built in the detection sensor 126 , and the detection sensor 126 determines whether the condenser cooling fan operates with a magnetic field generated by the rotation of the rotating body 122 . That is, when the air conditioner cooling fan rotates, the convex portions 123 and the concave portions 124 of the rotating body 122 are alternately formed, so that a magnetic field is generated between the magnets 127 inside the sensor 126, and this magnetic field is It is applied to the sensor coil to generate an electrical voltage. Accordingly, the clutch operation is controlled by detecting whether the air conditioner fan is operating using the signal detected from the sensor 126 .

Accordingly, the operation detection device according to an embodiment of the present invention is attached to the housing of the condenser fan, and receives the condenser fan operation detection signal and the refrigerant pressure switch 110 signal from the control unit 130 to receive the refrigerant pressure switch 110 . And by controlling the operation of the warning lamp 140 and the compressor clutch solenoid valve based on the condenser fan operation detection signal, the refrigerant pressure switch is turned on regardless of the condenser fan malfunction by blocking the power transmission by the compressor clutch when the condenser fan is in a malfunctioning state. It is turned off and the problem of deterioration and seizure caused by the clutch operation can be solved according to the warning lamp on and off.

3 is a flowchart of a conventional air conditioner controller control unit, and FIG. 10 is a schematic diagram illustrating a control method of an apparatus for preventing damage to an air conditioner compressor clutch in a vehicle according to an exemplary embodiment of the present invention.

3 and 10 together, in the control method of the apparatus for preventing damage to the air conditioner compressor clutch of a vehicle according to an embodiment of the present invention, (a) operates the air conditioner switch (S110) and operates the air conditioner switch from the compression clutch Power is transmitted (S120) (b) and the control unit determines whether the refrigerant pressure is normal (S130). Thereafter, (c) the normal operation of the condenser cooling fan is detected (S140). At this time, (d) when the condenser fan does not operate normally, the control unit blocks power transmission from the compressor clutch (S180).

Here, in step (b), when the refrigerant pressure is abnormal, the controller turns on the refrigerant pressure switch (S150), and when the refrigerant pressure switch is on, the controller turns on the warning lamp (S160).

In addition, in step (d), when the condenser cooling fan does not operate normally, the control unit turns on the warning lamp (S160), and when the warning lamp is on, the control unit blocks power transmission from the compressor clutch (S180) ).

That is, in the conventional air conditioner controller, when the air conditioner switch is turned on, the compressor clutch is turned on by the operation of the solenoid valve and the air conditioner is operated. After that, if the refrigerant pressure is abnormally high, the refrigerant pressure switch is turned on even when the cooling fan does not operate, and the warning lamp is also turned on and the compressor clutch is turned off.

However, in the control method of an apparatus for preventing damage to an air conditioner compressor clutch in a vehicle according to an embodiment of the present invention, when the condenser cooling fan does not operate when the refrigerant pressure is normal, the control unit turns on a warning lamp and transmits power from the compressor clutch When the condenser cooling fan does not work, the compressor clutch continues to drop.

11 is a schematic diagram illustrating a flowchart of another control method of an apparatus for preventing damage to an air conditioner compressor clutch in a vehicle according to another embodiment of the present invention.

11, in step (c), it is determined whether the refrigerant pressure is normal (S130), and when the refrigerant pressure is abnormal, the refrigerant pressure switch is turned on (S150), and when the refrigerant pressure switch is turned on, the controller warns Turns on the lamp (S160). At this time, it is determined whether the number of on/off of the condenser cooling fan is equal to or greater than a predetermined number (S170). In the case of abnormal on-off, the control unit cuts off power transmission from the compressor clutch (S180).

Therefore, the device and control method for preventing damage to the clutch of an air conditioner compressor for a vehicle according to the present invention extend the life of the compressor clutch by preventing the occurrence of deterioration and seizure of the compressor clutch by continuously operating the clutch on/off due to the non-operation of the condenser cooling fan regardless of the refrigerant liquid compression problem And it may provide the effect of improving the quality.

Those of ordinary skill in the art to which the present invention pertains will understand that the present invention may be embodied in other specific forms without changing the technical spirit or essential features thereof. Therefore, the embodiments described above are only presented by selecting and presenting the most preferred embodiments in order to help those skilled in the art understand from among various possible embodiments, and the technical spirit of the present invention is not necessarily limited or limited only by the presented embodiments. No, it is revealed that various changes, additions, and changes are possible within the scope without departing from the technical spirit of the present invention, as well as other equivalent embodiments are possible. The scope of the present invention is indicated by the claims described below rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention. should be interpreted In addition, on the basis of the principle that the inventor can appropriately define the concept of a term to describe his invention in the best way, the terms or words used in the present specification and claims are defined, and conventional or dictionary It should not be construed as being limited only by meaning. In addition, the order of the components described in the above process does not necessarily have to be performed in a time series order, and even if the execution order of each component and step is changed, if the gist of the present invention is satisfied, such a process may fall within the scope of the present invention. of course there is

110: refrigerant pressure switch 120: operation detection device
122: rotating body 123: convex parts
124: recesses 126: detection sensor
127: magnet 130: control unit
140: warning lamp

Claims (16)

A method of controlling an air conditioner compressor clutch damage prevention device of a vehicle, the method comprising:
(a) operating the air conditioner switch;
(b) determining whether the refrigerant pressure is normal in the control unit;
(c) detecting the normal operation of the condenser cooling fan when the refrigerant pressure is normal, and
(d) blocking power transmission from the compressor clutch by the control unit when the condenser cooling fan does not operate normally;
Control method comprising a. delete delete delete delete delete delete delete delete delete The method of claim 1,
In the step (b), when the refrigerant pressure is abnormal, the control method characterized in that the control unit turns on the refrigerant pressure switch. 12. The method of claim 11,
A control method characterized in that the control unit turns on a warning lamp when the refrigerant pressure switch is turned on. The method of claim 1,
In the step (d), when the condenser cooling fan does not operate normally, the control method characterized in that the warning lamp is turned on. 14. The method of claim 13,
The control method, characterized in that when the warning lamp is turned on, the control unit cuts off power transmission from the compressor clutch. The method of claim 1,
In the step (c), when the warning lamp is turned on, the controller determines whether the number of on-offs of the condenser cooling fan is a predetermined number or more. 16. The method of claim 15,
When the number of on/off of the cooling fan is greater than or equal to a predetermined number of times, the control unit blocks power transmission from the compressor clutch.

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