KR20200124521A - Swashplate type compressor - Google Patents

Abstract

Disclosed is a swash plate type compressor in which a control unit is provided to exchange heat with a working fluid that is a compression target in a low temperature state, so as to perform stable independent control. According to an embodiment of the present invention, the swash plate type compressor comprises: a working fluid flow unit configured to allow a working fluid to flow by having a suction chamber provided with a suction space which is a space for sucking the working fluid to be compressed, and sucking the working fluid, and having a discharge chamber adjacent to the suction chamber for discharging the working fluid to the outside; a control valve adjacent to the working fluid flow unit to adjust the internal pressure of the working fluid flow unit; and a control unit disposed adjacent to the suction chamber to allow heat exchange with a suction working fluid, which is the working fluid sucked into the working fluid flow unit, and controlling the control valve.

Description

Swash plate type compressor {SWASHPLATE TYPE COMPRESSOR}

The present invention relates to a swash plate type compressor, and more particularly, to a swash plate type compressor in which a control unit included in the swash plate type compressor is provided to exchange heat with a working fluid to be compressed.

Typically, a vehicle air conditioner is provided with a refrigerant compression cycle device for providing cooling and heating. Such a refrigerant compression cycle device generally includes a compressor that compresses and circulates the refrigerant. In addition, as a compressor provided in a refrigerant compression cycle device for a vehicle, a variable capacity type swash plate type compressor configured to vary the inclination angle of the swash plate installed on the drive shaft according to the heat load is widely used.

The variable displacement type swash plate compressor is provided so that the inclination angle of the swash plate installed on the drive shaft can be adjusted relative to the housing according to the heat load. In other words, the swash plate of the variable displacement type swash plate type compressor rotates with an inclination angle that is a relative adjustable angle with respect to the housing.

Accordingly, the piston of the variable displacement swash plate compressor is configured such that the stroke can be adjusted by the inclination angle of the variable displacement swash plate compressor adjusted with respect to the housing.

The inclination angle of the above-described swash plate can be adjusted by a difference between the pressure inside the crankcase and the pressure inside the suction chamber of the variable displacement type swash plate compressor. That is, when the high pressure refrigerant inside the discharge chamber that discharges the refrigerant is introduced into the crank chamber and the pressure inside the crank chamber is increased, the inclination angle of the swash plate is vertically arranged with respect to the main axis, so that the piston stroke decreases, and the discharge flow rate of the refrigerant decreases. Is done. On the contrary, when the internal pressure of the crankcase is reduced, the swash plate becomes inclined with respect to the main shaft to form an inclination angle. Accordingly, the stroke of the piston increases, and the discharge flow rate of the refrigerant also increases.

The crank chamber is in constant communication with the suction chamber, and a control valve for controlling the flow rate of high pressure refrigerant from the discharge chamber by connecting the crank chamber and the discharge chamber is provided in the swash plate compressor. The control valve that controls the high-pressure refrigerant flow rate from the discharge chamber can be classified into a mechanical control valve and an electronic control valve depending on the operation method. In the case of a mechanical control valve, the suction chamber, crank chamber and discharge chamber are not controlled separately. It is operated by the pressure difference at These mechanical control valves operate together with the so-called "internal control type variable compressor", and have to be controlled to maintain the temperature of the evaporator outlet at 1 ~ 2℃, so the width of temperature control is small, and the clutch for on/off of the compressor is separately There is a drawback to be equipped.

On the other hand, the electronic control valve is used together with the so-called "external control type variable compressor", and includes an operating rod driven by an electronic actuator such as a solenoid inside. The actuating rod driven by the electronic actuator moves the valve bodies according to the on/off of the solenoid, and accordingly, the discharge chamber, the crank chamber and the suction chamber can be selectively communicated, as well as the opening degree thereof. For this reason, the externally controlled variable compressor can control the evaporator outlet temperature in the range of 1 ~ 12℃, enabling optimized operation for the cooling load, reducing power consumption and enabling operation without a clutch. Therefore, it has the advantage of reducing manufacturing cost.

Here, a control unit for controlling the above-described electronic control valve is provided in the vehicle air conditioning system. The control unit for controlling the electronic control valve adjusts the opening degree of the valve in consideration of the indoor temperature and external environmental conditions set by the user. That is, the control unit can adjust the opening degree of the valve, can change the stroke of the piston by adjusting the opening degree of the valve, and control the stroke of the piston to maintain the indoor space at a preset temperature. .

Meanwhile, in order to independently control the compressor of the refrigerant compression cycle device, a control unit for controlling the above-described control valve must be disposed in the compressor. However, since the compressor of the refrigerant compression cycle device operates at a high temperature, if a separate heat exchange device is not provided when the control unit that controls the control valve is disposed in the compressor, the problem of damage to the control unit and deterioration of performance due to high temperature may occur. Can occur.

Accordingly, it is an object of the present invention to provide a swash plate type compressor in which a control unit included in a swash plate type compressor is provided to exchange heat with a working fluid that is a compression target in a low temperature state, and can stably independently control.

According to an aspect of the present invention, a suction space as a space in which the working fluid to be compressed is sucked is provided, and a suction chamber in which the working fluid is sucked and a discharge chamber provided adjacent to the suction chamber to discharge the working fluid to the outside are provided. A working fluid flow unit provided to allow the working fluid to flow; A control valve adjacent to the working fluid flow unit to adjust the internal pressure of the working fluid flow unit; And a control unit disposed adjacent to the suction chamber to allow heat exchange with the suction working fluid, which is the working fluid sucked into the working fluid flow unit, and controlling the control valve. It may be provided with a swash plate type compressor.

It may further include a rear housing separating the suction chamber and the discharge chamber by a partition wall.

The control unit may be connected to the suction chamber side of the rear housing and may be provided to exchange heat with the suction working fluid.

A control unit housing supporting the control unit in a region on the rear housing adjacent to the suction space; And a cooling unit connected to the control unit housing to enable heat exchange between the control unit and the suction working fluid.

It may include a cooling working fluid inlet chamber provided between the rear housing and the control unit housing so as to allow the suction working fluid to flow therethrough so as to allow heat exchange with the control unit.

The cooling unit is formed so that the suction chamber and the cooling working fluid inlet chamber communicate with each other between the suction chamber and the cooling working fluid inlet chamber, so that the suction working fluid is provided to flow into the cooling working fluid inlet chamber. Working fluid communication path; And a leak-preventing gasket that connects the suction working fluid inlet chamber and the control unit housing to prevent leakage of the cooling working fluid.

It may further include a suction pressure sensor connected to the rear housing to measure the suction pressure that is the pressure of the suction chamber.

And a suction pressure sensor housing integrally connected to the control unit housing, wherein the suction pressure sensor may be provided inside the suction pressure sensor housing integrally connected to the control unit housing.

The suction pressure sensor may be spaced apart from the control unit housing and pass through the rear housing to be connected to the suction chamber.

The suction pressure sensor may be connected to the suction chamber through the suction pressure sensor housing and the rear housing.

A valve control unit determining a target suction pressure based on a value measured by the suction pressure sensor and a predetermined set temperature; And a valve driving unit that controls the control valve so that the pressure in the suction chamber becomes the target suction pressure determined by the valve control unit.

Information on the external air condition and a preset evaporator outlet temperature from the vehicle air conditioner control system may be provided to the valve control unit.

When it is necessary to provide cooling, the valve control unit may set the target suction pressure to be lower than the measured suction pressure.

The vehicle air conditioner control system and the wired or wirelessly connected to further include a transmitting and receiving unit for transmitting and receiving a signal, the valve control unit and the valve driving unit may be provided separately from the air conditioner control system of the vehicle.

The valve control unit and the valve driving unit may be integrated and provided in a vehicle air conditioner control system.

According to aspects of the present invention having the above-described characteristics, the control unit included in the swash plate type compressor is provided adjacent to the suction chamber, thereby enabling efficient heat exchange with the working fluid in a low temperature state inside the suction chamber. There is an effect of preventing damage to the control unit and reduction of efficiency due to high temperature conditions. In other words, according to the present invention, when the working fluid to be compressed is compressed and inhaled before reaching the high temperature state, heat exchange between the working fluid in the low temperature state and the control unit can be efficiently performed, so that it can be stably controlled independently, and the efficiency It has the effect of maximizing.

1 is a cross-sectional view showing the internal structure of a swash plate type compressor according to an embodiment of the present invention.
2 is a cross-sectional view showing the internal structure of a swash plate type compressor according to another embodiment of the present invention.
3 is a cross-sectional view showing the internal structure of a swash plate type compressor according to another embodiment of the present invention.
4 is a block diagram schematically showing a vehicle air control system including a control device for controlling the operation of the swash plate compressor shown in FIGS. 1 to 3.
5 is a block diagram schematically showing the configuration of another embodiment of a control unit for controlling the operation of the swash plate type compressor shown in FIGS. 1 to 3.

In order to fully understand the present invention, operational advantages of the present invention, and objects achieved by the implementation of the present invention, reference should be made to the accompanying drawings illustrating preferred embodiments of the present invention and the contents described in the accompanying drawings.

Specific structural or functional descriptions of the embodiments according to the concept of the present invention disclosed in the present specification are merely illustrative for the purpose of describing the embodiments according to the concept of the present invention, and the embodiments according to the concept of the present invention are It may be implemented in various forms and is not limited to the embodiments described herein.

Since the embodiments according to the concept of the present invention can apply various changes and have various forms, embodiments are illustrated in the drawings and will be described in detail in the present specification. However, this is not intended to limit the embodiments according to the concept of the present invention to specific disclosed forms, and includes all changes, equivalents, or substitutes included in the spirit and scope of the present invention.

Terms such as first or second may be used to describe various elements, but the elements should not be limited by the terms. The terms are only for the purpose of distinguishing one component from other components, for example, without departing from the scope of the rights according to the concept of the present invention, the first component may be named as the second component and similarly the second component. The component may also be referred to as a first component.

When a component is referred to as being "connected" or "connected" to another component, it is understood that it is directly connected to or may be connected to the other component, but other components may exist in the middle. Should be. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there is no other component in the middle. Other expressions describing the relationship between components, such as "between" and "directly between" or "adjacent to" and "directly adjacent to" should be interpreted as well.

Terms used in the present specification are used only to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as "comprises" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described herein, but one or more other features. It is to be understood that the possibility of addition or presence of elements or numbers, steps, actions, components, parts, or combinations thereof is not preliminarily excluded.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this specification. Does not.

Hereinafter, the present invention will be described in detail by describing a preferred embodiment of the present invention with reference to the accompanying drawings. The same reference numerals in each drawing indicate the same member.

1 is a cross-sectional view showing the internal structure of a swash plate type compressor according to an embodiment of the present invention.

As shown in detail in Fig. 1, the swash plate type compressor 1 according to an embodiment of the present invention includes a working fluid flow unit 70, a control valve 100, a control unit 400, and a rear housing ( 30), a control unit housing 80, a cooling unit 500, and a suction pressure sensor 401.

On the other hand, in the swash plate type compressor 1 according to the present embodiment, a center bore 11 is formed through the center of the cylinder housing 10, and a plurality of cylinder bores are formed to penetrate the cylinder by radially surrounding the center bore 11 ( 13) is formed. A piston 15 is movably installed inside the cylinder bore 13 to compress the refrigerant in the cylinder bore 13.

A front housing 20 is installed at one end of the cylinder housing 10. The front housing 20 cooperates with the cylinder housing 10 to form a crankcase 21 therein.

In addition, the rear housing 30 is installed at the other end of the cylinder housing 10, that is, in an area opposite to the position where the front housing 20 is installed. The rear housing 30 is provided with a working fluid flow unit 70 to selectively communicate with the cylinder bore 13, and the working fluid flow unit 7 has a suction chamber 71 and a discharge chamber 73. .

The suction chamber 71 serves to deliver the refrigerant to be extruded into the cylinder bore 13. The discharge chamber 73 is formed on one side of the working fluid flow unit 70 in a region corresponding to the outside of a surface facing the cylinder housing 10 of the rear housing 30. The discharge chamber 73 is a place where the refrigerant compressed by the cylinder bore 13 is discharged and temporarily stays.

In other words, the working fluid flow unit 70 is provided with a suction space, which is a space in which the working fluid to be compressed is sucked, and is provided adjacent to the suction chamber 71 and the suction chamber 71 in which the working fluid is sucked to discharge the working fluid to the outside. The discharge chamber 73 is provided, and the working fluid is provided to flow.

In addition, a control valve 100 is provided on one side of the rear housing 30. The control valve 100 is provided adjacent to the working fluid flow unit 70 to adjust the internal pressure of the working fluid flow unit 70. The control valve 100 serves to adjust the angle of the swash plate 48 by adjusting the opening degree of the flow path between the crank chamber 21 and the suction chamber 71 and the flow path between the discharge chamber 73 and the crank chamber 21. do.

And, in the swash plate type compressor 1 according to the present embodiment, as shown in detail in FIG. 1, it rotates through the center bore 11 of the cylinder housing 10 and the shaft hole 23 of the front housing 20. A rotating shaft 40 is installed to enable it. The rotation shaft 40 rotates by the driving force transmitted from the engine. The rotation shaft 40 is rotatably installed in the cylinder housing 10 and the front housing 20 by a bearing 42.

In addition, the rotation shaft 40 passes through the center of the front housing 20, and a rotor 44 that rotates integrally with the rotation shaft 40 is installed in the crank chamber 21. At this time, the rotor 44 is installed by being fixed to the rotation shaft 40 in a substantially disk shape, and a hinge arm (not shown) is protruded on one surface of the rotor 44.

The swash plate 48 is hingedly coupled to the rotor 44 on the rotation shaft 40 and is installed to rotate together. The swash plate 48 is installed so that the angle with respect to the rotation shaft 40 is variable according to the discharge capacity of the compressor. That is, it is between a state orthogonal to the longitudinal direction of the rotation shaft 40 or a state inclined at a predetermined angle with respect to the rotation shaft 40. The swash plate 48 has its edges connected to the pistons 15 through shoes (not shown). That is, the edge of the swash plate 48 is connected to the connecting portion 17 of the piston 15 through the shoe so that the piston 15 moves linearly in the cylinder bore 13 by the rotation of the swash plate 48.

Meanwhile, a radial thread spring (not shown) is installed between the rotor 44 and the swash plate 48 to provide an elastic force. The semi-thread spring is installed around the outer surface of the rotation shaft 40 and provides elastic force in a direction in which the inclination angle of the swash plate 48 decreases. A swash plate stopper 58 protrudes from one surface of the swash plate 48. The swash plate stopper 58 serves to regulate the degree to which the swash plate 48 is inclined obliquely with respect to the rotation shaft 40.

Then, the pulley assembly 60 is mounted on one end of the rotation shaft 40. The pulley assembly 60 is mounted to receive rotational power through a belt and a power source different from the engine of the vehicle. And, the clutch assembly 62 is installed in the pulley assembly 60, the clutch assembly 62 is installed on the outside of the coil and core 62a and the pulley assembly 60 installed inside the pulley assembly 60 And a disk 62b.

Here, since the clutch assembly 62 may employ any commonly known type, a detailed description thereof will be omitted. In either case, the clutch assembly 62 is in close contact with the disk according to the current applied to the coil and the core 62a, and accordingly, the rotational power transmitted to the pulley assembly 60 is also transmitted to the rotation shaft 40. The greater the applied current is, the greater the degree to which the disk adheres. When the degree of close contact with the disk increases, the loss of rotational power transmitted to the pulley assembly 60 decreases, and the loss of rotational power is minimized, and is transmitted to the rotational shaft 40. However, when the current applied to the coil and core 62a is low, the loss of rotational power transmitted to the pulley assembly 60 increases, and only a part of the rotational power is transmitted to the rotational shaft 40. Using this principle, the degree of application of the current may be controlled to control the rotational power or torque applied to the rotating shaft 40 that drives the swash plate type compressor 1.

When current is not applied to the clutch assembly 62, only the pulley assembly 60 rotates, but the rotation shaft 40 does not rotate. Accordingly, unnecessary operation of the swash plate compressor 1 can be prevented, and it is possible to help improve the efficiency of the swash plate compressor 1. In addition, as the inclination angle of the swash plate 48 with respect to the rotation shaft 40 increases, and accordingly, the stroke of the piston 15 increases, the required torque increases, and the inclination angle with respect to the rotation shaft 40 of the swash plate 48 decreases. As the stroke of the piston 15 decreases, the required torque decreases. Therefore, the torque transmitted according to the inclination angle of the swash plate 48 can be appropriately controlled to minimize the power consumed by the swash plate type compressor 1, which leads to an increase in the efficiency of the entire vehicle.

The rear housing 30 separates the suction chamber 71 and the discharge chamber 73 by partition walls. Further, the control unit 400 is disposed adjacent to the suction chamber 71 and is provided to exchange heat with the suction working fluid, which is the working fluid sucked into the working fluid flow unit 70, and controls the control valve 100. The control unit 400 according to the present embodiment is connected to the suction chamber 71 of the rear housing 30 and is provided to exchange heat with the suction working fluid. That is, heat exchange between the low temperature suction working fluid sucked into the suction chamber 71 and the control unit 400 improves the stability and efficiency of the control unit 400.

Meanwhile, a control unit housing 80 supporting the control unit 400 in an area adjacent to the suction space on the rear housing 30 may be provided to stably support the control unit 400. In addition, the cooling unit 500 is connected to the control unit housing 80 so that heat exchange between the control unit 400 and the suction working fluid can be efficiently provided.

The suction pressure sensor 401 is connected to the rear housing 30 to measure suction pressure, which is the pressure in the suction chamber. The suction pressure sensor 401 according to the present embodiment is separated from the control unit housing 80 and penetrates the rear housing 30 and is connected to the suction chamber 71. Therefore, the temperature of the suction chamber 71 can be efficiently measured.

2 is a cross-sectional view showing the internal structure of a swash plate type compressor according to another embodiment of the present invention. With reference to FIG. 2, only parts different from the above-described embodiment of the present invention will be described, and descriptions of the same parts will be omitted.

As shown in detail in FIG. 2, the swash plate type compressor 2 according to the present embodiment is different from the above-described embodiment in that it further includes a suction pressure sensor housing 90.

The suction pressure sensor housing 90 according to the present embodiment may be integrally connected to the control unit housing 80 to increase the efficiency of maintenance and repair. In addition, since the suction pressure sensor 401 according to the present embodiment is provided inside the suction pressure sensor housing 90 integrally connected to the control unit housing 80, there is an effect of increasing stability. And since the suction pressure sensor 401 according to the present embodiment is connected to the suction chamber 71 through the suction pressure sensor housing 90 and the rear housing 30, the temperature of the suction chamber 71 can be efficiently measured. I can.

3 is a cross-sectional view showing the internal structure of a swash plate type compressor according to another embodiment of the present invention. With reference to FIG. 3, only parts different from the above-described embodiments of the present invention will be described, and descriptions of the same parts will be omitted.

As shown in detail in FIG. 3, in the swash plate type compressor 3 according to the present embodiment, the cooling unit 500 includes a cooling working fluid inlet chamber 510, a suction working fluid communication path 520, and a leak prevention Including the gasket 530 is different from the above-described embodiments.

In the cooling unit 500 according to the present embodiment, as shown in detail in FIG. 3, the suction working fluid is formed between the rear housing 30 and the control unit housing 80 so as to be able to flow in. That is, the cooling unit 500 according to the present embodiment includes a cooling working fluid inlet chamber 510 provided to efficiently heat exchange due to a temperature difference between the control unit 80 and the suction working fluid.

In addition, the cooling unit 500 according to the present embodiment further includes a suction working fluid communication path 520 and a gasket 530 for preventing leakage.

The suction working fluid communication path 520 is formed so that the suction chamber 71 and the cooling working fluid inflow chamber 510 communicate between the suction chamber 71 and the cooling working fluid inlet chamber 510. That is, the suction working fluid is provided to be efficiently introduced into the cooling working fluid inlet chamber to induce effective heat exchange between the suction working fluid and the control unit 400.

In addition, the leak-preventing gasket 530 connects the cooling working fluid inlet chamber 510 and the control unit housing 80, but prevents leakage of the cooling working fluid to increase stability.

4 is a block diagram schematically showing a control system of air for a vehicle having a control device for controlling the operation of the swash plate type compressor shown in FIGS. 1 to 3, and FIG. 5 is a block diagram shown in FIGS. It is a block diagram schematically showing the configuration of another embodiment of a control unit for controlling the operation of the swash plate type compressor.

Referring to FIG. 4, the control unit 200 of the air conditioner includes a set temperature input unit 201 that enables a user to set a desired temperature, an outside temperature sensor 202 that measures the temperature of the outside air, and the air conditioner. Including an evaporator outlet temperature sensor 203 for measuring the outlet temperature of the evaporator during the provided cooling cycle, an internal air temperature sensor 204 for measuring the indoor temperature of the vehicle, and an insolation sensor 205 for measuring the load caused by direct sunlight. , Controls the operation of the air conditioner based on factors measured or input from them.

In addition, the control unit 200 of the air conditioner further includes an air conditioner door driving unit 210 for controlling an actuator motor 222 for operating a temperature control door provided in the air conditioning system 220. Accordingly, the control unit 200 of the air conditioner controls the temperature control door provided in the air conditioner based on a predetermined input value and various measured values to maintain the interior of the vehicle at the input set temperature. In addition, the control unit 200 of the air conditioner is configured to communicate by being connected to a wired or wireless communication means so as to exchange signals from the engine control unit 300 mounted on the vehicle.

The engine control unit 300 is connected to the engine 310 and a pedal sensor 312 that measures the degree to which the accelerator pedal is pressed, and controls the operation of the engine according to the signal measured and generated by the pedal sensor 312. In this process, heat generated from the engine may be used to control the indoor temperature by a coolant circulation circuit (not shown).

Meanwhile, a control unit 400 for controlling the swash plate type compressors 1, 2, and 3 according to the above-described exemplary embodiments is provided separately from the control unit 200 of the air conditioner. In other words, as described above, the control unit 400 is disposed adjacent to the suction chamber 71 to enable heat exchange with the suction working fluid, without damage to the control unit 400 due to high temperature and deterioration of efficiency, independently of the swash plate type. The compressor can be controlled. The control unit 400 is configured to be wired or wirelessly connected to the air conditioner control unit 200 and the engine control unit 300 to exchange signals with each other, and based on the measured values provided from each of the swash plate type compressors. Control the operation of

Specifically, the control unit 400 includes a valve control unit 410 for controlling the suction pressure of the refrigerant discharged through the compressor, a clutch control unit 420 for controlling the operation of a clutch provided in the swash plate type compressor, and a clutch. It includes a compressor torque management unit 430 for controlling the torque transmitted to the compressor through and an abnormality detection unit 440 for checking an operation state of the compressor.

In addition, a valve driving unit 450 for controlling the control valve 100 and a clutch driving unit 460 for operating the clutch are additionally included based on signals provided therefrom. The valve driver 450 controls a current applied to an electromagnetic actuator provided in the control valve 100. The clutch drive unit 460 controls the current applied to the coil provided in the clutch assembly to maintain the electromagnetic force in the clutch assembly as much as the torque transmitted to the rotation shaft 40 of the swash plate compressor.

At this time, the valve driving unit 450 and the clutch driving unit 460 control the operation of the swash plate type compressor by comprehensively considering information transmitted from various control units and management units provided in the control unit 400. Each control unit and management unit is based on the values measured using the suction pressure sensor 401, the discharge pressure sensor 402, and the speed and stroke sensor 403 of the swash plate compressor. Control the operation.

Here, the values measured through the above-described sensors include both the suction pressure and the discharge pressure, but the suction pressure is used to control the stroke of the piston 15. That is, the stroke of the piston 15 is adjusted according to the difference between the measured suction pressure and the target suction pressure.

The valve control unit 410 determines the discharge amount, that is, the stroke of the piston, based on the difference between the suction pressure measured as described above and the target suction pressure, and the valve driving unit 450 ′ determines the control valve ( It controls the operation of the electromagnetic actuator provided in 100). In this process, the target suction pressure is calculated based on information such as a set temperature and an outside temperature transmitted from the air conditioner controller 200.

On the other hand, looking at the process in which the suction pressure is controlled, the inside temperature Tp is measured by the air conditioner control unit in which the control is started. It is determined whether or not the measured betting temperature Tp is the same as the preset set temperature Ts, and if it is the same, the betting temperature Tp is measured again after a predetermined time has elapsed. If the measured betting temperature Tp is different from the set temperature Ts, it is determined that the betting temperature Tp needs to be adjusted.

At this time, the cause of the difference between the inside temperature Tp and the set temperature Ts is determined, and if the user's input is determined to be the cause, the input temperature is set to a new set temperature Ts. If there is a difference between the set temperature (Ts) and the inside temperature (Tp) even though there is no user input, it is determined as a change due to an external cause.

After that, the set temperature (Ts) and the internal air temperature (Tp) are compared. If the inside temperature Tp is greater than the set temperature Ts, cooling is required, and the target suction pressure Ps is reset to a lower value. If the internal air temperature Tp is less than the set temperature Ts, it is excessively cooled and it is necessary to reduce the amount of refrigerant discharged from the compressor. Therefore, in this case, the target suction pressure Ps is reset to a larger value.

After resetting the target suction pressure (Ps) in this way, it is compared with the actual suction pressure (Ps). When the target suction pressure Ps is greater than the measured actual suction pressure Ps, the suction pressure Ps must be adjusted higher, so that the control valve 100 is appropriately controlled.

After controlling the control valve 100 in this way, the actual suction pressure (Ps) is re-measured and it is checked whether the target value is reached. If there is still a difference between the two, the above process is repeated, and if the same, the control is terminated.

The compressor torque management unit 430 calculates the current compressor torque based on the suction pressure, the discharge pressure, the driving speed of the compressor, and the stroke information of the piston. At this time, the torque can be calculated by the following equation.

[Equation 1]

The calculated torque value is transmitted to the engine control unit 300 to precisely control the engine load for the compressor torque. Also, the torque value can be used to control the clutch. That is, since the current applied to the clutch can be adjusted based on the torque value calculated by [Equation 1], the clutch power consumption is controlled according to the compressor torque. It is possible to increase engine efficiency by precisely controlling the engine load through the compressor torque calculation, and to reduce the clutch power consumption by controlling the clutch applied current according to the compressor torque.

On the other hand, the abnormality detection unit 440 may be operated with an external command or a preset frequency, and, like a torque calculating unit, detects the presence or absence of an abnormality based on values such as suction pressure, discharge pressure, compressor operating speed, and piston stroke. do. The generated data may be transmitted to the engine control unit and used for engine operation.

Based on each of the above-described data, it is possible to check whether there is an abnormality in the control valve 100 or the clutch provided in the swash plate type compressor, and if a problem is detected as a result of the check, the engine control unit 300 or the vehicle It can be transferred to other control units of the user so that appropriate actions can be taken.

In the above, preferred embodiments of the present invention have been exemplarily described, but the scope of the present invention is not limited to such specific embodiments, and can be appropriately changed within the scope described in the claims. For example, the target suction pressure can be determined not only in the control unit of the compressor, but also anywhere in the system controlling the air conditioner in the automobile.

According to the aspects of the present invention having the characteristics as described above, the control unit included in the swash plate type compressor is provided adjacent to the suction chamber, thereby enabling efficient heat exchange with the working fluid in a low temperature state inside the suction chamber. There is an effect of preventing damage to the control unit and reduction of efficiency due to high temperature conditions. In other words, according to the present invention, when the working fluid to be compressed is compressed and inhaled before reaching the high temperature state, heat exchange between the working fluid in the low temperature state and the control unit can be efficiently performed, so that it can be stably controlled independently, and the efficiency It has the effect of maximizing.

As described above, the present invention is not limited to the described embodiments, and it is obvious to those of ordinary skill in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, it should be said that such modifications or variations belong to the claims of the present invention.

Claims (15)

A suction space, which is a space in which the working fluid to be compressed is sucked, is provided, and a suction chamber in which the working fluid is sucked and a discharge chamber provided adjacent to the suction chamber to discharge the working fluid to the outside are provided to allow the working fluid to flow. A working fluid flow unit;
A control valve adjacent to the working fluid flow unit to adjust the internal pressure of the working fluid flow unit; And
And a control unit disposed adjacent to the suction chamber to allow heat exchange with the suction working fluid, which is the working fluid sucked into the working fluid flow unit, and controlling the control valve.
The method of claim 1,
A swash plate type compressor further comprising a rear housing separating the suction chamber and the discharge chamber with a partition wall.
The method of claim 2,
The control unit is a swash plate type compressor that is connected to the suction chamber side of the rear housing to enable heat exchange with the suction working fluid.
The method of claim 3,
A control unit housing supporting the control unit in a region on the rear housing adjacent to the suction space; And
A cooling unit connected to the control unit housing to enable heat exchange between the control unit and the suction working fluid.
The method of claim 4,
The cooling unit,
A swash plate type compressor comprising a cooling working fluid inlet chamber provided between the rear housing and the control unit housing so as to allow the suction working fluid to flow in and heat exchange with the control unit.
The method of claim 5,
The cooling unit,
A suction working fluid communication path formed to communicate with the suction chamber and the cooling working fluid inlet chamber between the suction chamber and the cooling working fluid inlet chamber so that the suction working fluid can flow into the cooling working fluid inlet chamber; And
A swash plate compressor comprising: a leak-preventing gasket connecting the cooling working fluid inlet chamber and the control unit housing to prevent leakage of the suction working fluid.
The method of claim 1,
A swash plate type compressor further comprising a; suction pressure sensor connected to the rear housing to measure suction pressure, which is the pressure of the suction chamber.
The method of claim 7,
The suction pressure sensor is spaced apart from the control unit housing, passes through the rear housing, and is connected to the suction chamber.
The method of claim 7,
Further comprising a; suction pressure sensor housing integrally connected to the control unit housing,
The suction pressure sensor is a swash plate type compressor provided in the suction pressure sensor housing integrally connected to the control unit housing.
The method of claim 9,
The suction pressure sensor is connected to the suction chamber through the suction pressure sensor housing and the rear housing.
The method of claim 7,
A valve control unit determining a target suction pressure based on a value measured by the suction pressure sensor and a predetermined set temperature; And
A swash plate type compressor further comprising a; valve driving unit for controlling the control valve so that the pressure in the suction chamber becomes the target suction pressure determined by the valve control unit.
The method of claim 11,
A swash plate type compressor in which information on an outdoor air condition and a preset evaporator outlet temperature from a vehicle air conditioner control system is provided to the valve control unit.
The method of claim 11,
The valve control unit, when cooling is required, sets the target suction pressure to be lower than the measured suction pressure.
The method of claim 11,
The vehicle air conditioner control system and the wired or wireless connection further comprises a transceiver for sending and receiving signals,
The swash plate type compressor that the valve control unit and the valve driving unit are provided separately from the air conditioner control system of the vehicle.
The method of claim 11,
The valve control unit and the valve driving unit are integrated into a vehicle air conditioner control system.

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