KR100620033B1 - Capacity variable type rotary compressor and airconditioner with this - Google Patents

Abstract

The present invention relates to a variable displacement rotary compressor and an air conditioner to which the same is applied. A bypass hole for communicating a suction chamber and a compression chamber of a cylinder is formed in a bearing plate, and the bypass hole is opened and closed by a bypass valve driven by an electromagnet. In this configuration, not only can the refrigeration capacity reduction rate be increased during the volume exclusion operation of the compressor, but also the volume exclusion operation can be continued for a long time to enable various adjustments of the air conditioner and reduce unnecessary power consumption of the compressor and the air conditioner employing the same. . In addition, it can be widely applied to a compressor or an air conditioner having a frequent refrigeration capacity control function, it is possible to improve the efficiency of the entire compressor or air conditioner employing it.

Description

Variable-capacity rotary compressors and air conditioners using them {CAPACITY VARIABLE TYPE ROTARY COMPRESSOR AND AIRCONDITIONER WITH THIS}

1 is a system diagram of an air conditioner having a variable displacement rotary compressor of the present invention;

Figure 2 is a "I-I" cross-sectional view of Figure 3 showing an example of the present invention variable displacement rotary compressor,

Figure 3 is a bottom view showing the compression portion of the variable displacement rotary compressor of the present invention,

4a and 4b is an operation diagram showing a power operation and a saving operation process in the variable displacement rotary compressor of the present invention,

5A and 5B are sectional views showing the operation of another embodiment of the variable displacement rotary compressor of the present invention.

** Description of symbols for the main parts of the drawing **

1: casing 2: condenser

3: expansion mechanism 4: evaporator

5: accumulator 6: condenser blower fan

7 evaporator blowing fan 8 motor terminal

9: valve terminal 10: cylinder

11: vaneslit 12: suction port

20: main bearing plate 22: discharge port

30: sub bearing 31: bearing hole

32a, 32b: bypass hole 33: valve hole

40: rotation axis 50: rolling piston

60: vane 70: discharge valve

80: volume change unit 81: sliding valve

81a: blocking portion 81b: communicating portion

82: electric mechanism 82a: electric shaft

82b: electromagnet 82c: support spring

83: connecting member F: gas flow path

SP: Gas suction pipe DP: Gasoline discharge pipe

The present invention relates to a variable displacement rotary compressor, and more particularly, to a variable displacement rotary compressor and an air conditioner to which the cooling power can be adjusted by exhausting the refrigerant gas of the compression chamber as necessary.

In general, a rotary compressor is mainly applied to an air conditioner such as an air conditioner. Recently, as the function of the air conditioner is diversified, the rotary compressor also requires a product that can vary in capacity. As a technique for varying the capacity of a rotary compressor, a so-called inverter method that controls the number of revolutions of the compressor by using an inverter motor is mainly known, but this technique is expensive because the inverter motor itself is expensive, and most of the air conditioners are statistically Considering that it is used as a cooler, it is difficult to increase the refrigerating capacity under heating conditions, which is more difficult in the cooling conditions, which is more important in the air conditioner compressor.

Accordingly, in recent years, the so-called "refrigeration capacity change technology" by changing the volume of the compression chamber by bypassing part of the refrigerant gas compressed in the cylinder to the outside of the cylinder (hereinafter referred to as "exchange volume switching"). Abbreviated as technology) is widely known.

Among the rotary compressors to which such exclusion volume switching technology is applied, normal operation is performed by adding a saving operation (hereinafter referred to as 'mode 0 operation') function that temporarily stops compression during operation of the compressor and zero the freezing capacity. The so-called "digital compression technology" is introduced to control the refrigeration capacity in combination with the power operation (hereinafter referred to as 'mode 1 operation') which is 100%.

For example, if the mode 1 operation is operated for 7 seconds and the mode 0 operation for 3 seconds, the freezing capacity by the operation for a total of 10 seconds is 70%. In this way, the compressor that controls the refrigeration capacity by adjusting the mode 1 operation and the mode 0 operation by time is commonly referred to as a 'digital compressor'. The feature of this digital compressor is that it does not require an inverter, so it is well used in addition to the low cost. This has the advantage of being excellent in efficiency and reliability.

However, most of the digital compression technologies known to date are approaching the practical stage in the scroll compressor field, whereas only the alternative ideas have been announced in the rotary compressor field, but the specific driving mechanisms have not yet been reached.

An object of the present invention is to provide a variable capacity rotary compressor and an air conditioner using the same, which have a mechanism that can be applied to a rotary compressor.

In order to achieve the object of the present invention, a casing having a gas suction pipe communicating with the evaporator and a gas discharge pipe communicating with the condenser; The rolling piston forms an inner space to compress the refrigerant during the pivoting movement, a suction port is formed to communicate with the gas suction pipe in the inner space, and a vane slit to support the vane that contacts the rolling piston to divide the inner space into a compression chamber and a suction chamber. A cylinder to form and install in the casing; A plurality of bearing plates covering the upper and lower sides of the cylinder to form an inner space together, forming a discharge port on one side, and forming bypass holes to communicate with both sides of the inner space of the cylinder on the other side; A discharge valve installed to open and close the discharge port of the bearing plate; A sliding valve slidingly inserted into a bypass hole of a bearing plate to selectively open and close the bypass hole according to an operation mode of the compressor; And a driving mechanism of which the electric shaft moves in the longitudinal direction depending on whether the electric current is applied, one end of which is coupled to the electric shaft, and the other end of which is coupled to the sliding valve, so that the sliding valve opens and closes the bypass hole. It provides a variable displacement rotary compressor including a; valve driving means made of a connecting member for transmitting to the sliding valve.

In addition, a casing having a gas suction pipe communicating with the evaporator and a gas discharge pipe communicating with the condenser; The rolling piston forms an inner space to compress the refrigerant during the pivoting movement, a suction port is formed to communicate with the gas suction pipe in the inner space, and a vane slit to support the vane that contacts the rolling piston to divide the inner space into a compression chamber and a suction chamber. A cylinder for forming a bypass hole so as to communicate with both sides of the inner space; A plurality of bearing plates covering both upper and lower sides of the cylinder to form an inner space together, and forming discharge holes on one side thereof; A discharge valve installed to open and close the discharge port of the bearing plate; A sliding valve slidingly inserted into the bypass hole of the cylinder to selectively open and close the bypass hole according to an operation mode of the compressor; And a driving mechanism of which the electric shaft moves in the longitudinal direction depending on whether the electric current is applied, one end of which is coupled to the electric shaft, and the other end of which is coupled to the sliding valve, so that the sliding valve opens and closes the bypass hole. It provides a variable displacement rotary compressor including a; valve driving means made of a connecting member for transmitting to the sliding valve.

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In addition, a variable displacement type rotary compressor is provided in which a cylinder is provided in a double layer from the front and a bypass hole is opened and closed in at least one of the cylinders by the volume variable unit.

Moreover, the air conditioner provided with the variable displacement rotary compressor mentioned above is provided.

Hereinafter, a variable displacement rotary compressor according to the present invention and an air conditioner using the same will be described in detail with reference to an embodiment shown in the accompanying drawings.

1 is a schematic diagram of an air conditioner having a variable displacement rotary compressor of the present invention, FIG. 2 is a cross-sectional view of the "I-I" section of FIG. 3, FIG. 3 is a bottom view showing a compression part of the variable displacement rotary compressor of the present invention. 4B is an operation diagram illustrating a power operation and a saving operation process.

As shown in FIGS. 1 to 3, the rotary compressor according to the present invention includes a casing 1 for communicating gas suction pipes SP and gas discharge pipes DP, and an upper side of the casing 1 for rotational force. And a compressor mechanism for compressing the refrigerant with the rotational force generated in the power mechanism and installed at the lower side of the casing 1.

The electric drive unit rotates while interacting with the stator Ms by fixing the inside of the casing 1 to stator Ms for applying power from the outside, and having a predetermined gap inside the stator Ms. It consists of electrons (Mr).

The compression mechanism is formed in an annular shape and the cylinder 10 installed in the casing 1 and the main bearing plate (hereinafter, abbreviated as main bearing) which cover the upper and lower sides of the cylinder 10 to form an inner space V together. 20) and the sub-bearing plate (hereinafter abbreviated as sub-bearing) 30, the rotating shaft is pressed into the rotor (Mr) and supported by the main bearing 20 and the sub-bearing 30 to transmit the rotational force 40, a rolling piston 50 rotatably coupled to an eccentric portion (unsigned) of the rotating shaft 40 to compress the refrigerant while turning in the inner space of the cylinder 10, and an outer circumferential surface of the rolling piston 50 The vane 60 which is radially movable to the cylinder 10 so as to be in pressure contact with the cylinder 10 and divides the internal space V of the cylinder 10 into the suction chamber and the compression chamber, and the discharge port provided in the main bearing 20 Of the discharge valve 70 and the sub-bearing 30 which are coupled to the front end of the 22 so as to be opened and closed. It is provided on one side and includes a variable volume unit (80) for varying the compression chamber capacity.

The cylinder 10 is formed in an annular shape so that the rolling piston 50 can perform a relative movement, as shown in Figures 1 to 3, the vane (60) can be linearly moved in a radial direction on one side thereof. The vane slit 11 is formed in a linear manner, and one side of the vane slit 11 radially penetrates the inlet 12 communicating with the gas suction pipe SP, while the other side of the vane slit 11 is formed as described above. The gas guide groove 13 is formed in communication with the discharge port 22 of the main bearing 20 to induce the discharge of the refrigerant gas. A communication hole 14 is formed in the bottom surface of the suction port 12 of the cylinder 10 so as to communicate with the suction side bypass hole 32a of the subframe 30 which will be described later.

The main bearing 20 is formed in the shape of a disc having a bearing hole 21 for radially supporting the rotation shaft 40 at the center thereof. The main bearing 20 has one side, that is, the maximum pressure angle of the vane slit 11 of the cylinder 10. The discharge port 22 is formed at a point approximately 345 ° in the rotational direction of the rolling piston 50 with respect to the vane slit 11, and a muffler (not shown) having a resonance chamber to accommodate the discharge port 22 is described above. It is fixedly installed on the upper surface of the main bearing 20.

The sub-bearing 30 is formed in the shape of a disc having a bearing hole 31 so as to radially support the rotating shaft 40 at the center thereof, and a sliding valve 81 to be described later through the inside of the bearing surface therethrough. The suction side bypass hole 32a and the discharge side bypass hole 32b are formed so as to be opened and closed by this. The suction side bypass hole 32a is formed at a position close to the suction port 12, that is, orthogonal to the center line of the suction port 12 during planar projection, while the discharge side bypass hole 32b is formed at the suction port 12. It may be formed in an arc shape so as to be positioned between the discharge port of the main bearing 20. For example, in order to reduce the compressor capacity by about 50% during the shaving operation, it is formed with a phase difference of about 180 °, while in order to reduce the compressor capacity by about 0%, as shown in FIGS. 6A and 6B, the discharge port is disposed between the vanes 60. It can be formed in the position adjacent to (22). In addition, the discharge-side bypass hole 32b is provided with a valve hole 33 which is in contact with the bypass hole 32b so as to be orthogonal to each other in planar projection, so as to slide the sliding valve 81 to be described later. The valve hole 33 is formed so that the inside is blocked and the outside is opened.

The volume variable unit 80 is slidably coupled to the valve hole 33 of the sub bearing 30 to engage with the sliding valve 81 and the sliding valve 81 to open and close the discharge side bypass hole 32b. The electric mechanism 82 which opens and closes the said discharge side bypass hole 32b while moving the sliding valve 81 in the longitudinal direction, and the sliding valve 81 are connected to the electric mechanism 82, and this electric mechanism 82 is connected. Bypass member 84 for transmitting the movement of the movement to the sliding valve 81 and the suction side bypass hole 32a and the discharge side bypass hole 32b of the sub-bearing 30, 84 )

The sliding valve 81 is slidably coupled to the inner circumferential surface of the valve hole 33 of the sub bearing 30 to block the discharge side bypass hole 32b and the discharge side bypass hole 32b. It is formed on one side of the blocking portion 81a so as to form the gas flow path F therebetween, and the discharge side bypass hole 32b is opened to the intake side bypass hole 32a and the communicating portion 81b. Is done.

The electric mechanism 82 elastically supports the electromagnet 82b for pulling the electric shaft 82a and moves it in the longitudinal direction when the electric current is applied, and the one end of the electric shaft 82a together with the connecting member 83 so that the electric current is not applied. It consists of a support spring 82c made of a compression coil spring to restore the above-mentioned transmission shaft 82a.

Although not shown in the drawings, a connection hole for connecting the suction side bypass hole and the discharge side bypass hole may be formed in the subframe, and the suction side bypass hole and the discharge side bypass hole may be formed in the cylinder. A connecting hole for forming the main wall and communicating with the two bypass holes may be formed in an arc shape inside the main wall of the cylinder, and a valve hole for communicating with the discharge-side bypass hole may be formed in the cylinder.

2, condenser, 3 expansion device, 4 evaporator, 5 accumulator, 6 condenser blower fan, 7 evaporator blower fan, 8 terminal for motor, 9 terminal for valve, 33a for balance It is a hole.

The present invention variable capacity rotary compressor as described above has the following effects.

That is, when power is applied to the electric drive unit, the rotating shaft 40 rotates, and the rolling piston 50 forms a volume between the vanes 60 while turning in the inner space V of the cylinder 10. The refrigerant is sucked and compressed and then discharged into the casing (1). The refrigerant gas is blown into the condenser (2) of the refrigeration cycle apparatus by blowing the gas discharge pipe (DP) into the expansion mechanism (3) and the evaporator (4). After passing through in sequence and repeats a series of processes to be sucked back into the inner space (V) of the cylinder 10 through the gas suction pipe (SP).

Here, the variable volume compressor performs a saving operation or a power operation according to the operating state of the air conditioner employing the same, which will be described in more detail as follows.

First, in the power operation, as shown in FIG. 4A, the power is turned on to the electromagnet 82 of the volume variable unit so that the transmission shaft 82a of the electromagnet 82b overcomes the support spring 82c and moves upward. By the connecting member 83 coupled to the transmission shaft 82a so that the sliding valve 81 moves upward together with the transmission shaft 82a, that is, in the direction of blocking the discharge side bypass hole 32b. Do it. In this way, the refrigerant gas sucked into the inner space V of the cylinder 10 is compressed while moving toward the discharge port 22 without being excluded by the suction side bypass hole 32a, and this compressed gas is discharged ( It is discharged into the casing 1 through 32 so that all the compressed gas moves to the condenser 2.

On the other hand, in the shaving operation, as shown in FIG. 4B, the power is turned off to the electromagnet 82 of the volume variable unit 80 so that the transmission shaft 82a of the electromagnet 82b is driven by the restoring force of the support spring 82c. The sliding valve 81 opens downwardly, that is, the discharge side bypass hole 32b, together with the electric shaft 82a by the connecting member 83 coupled to the electric shaft 82a so as to move in the downward direction in the drawing. Move in the direction of In this way, a part of the refrigerant gas sucked into the internal space V of the cylinder 10 passes through the discharge side bypass hole 32b, the bypass connecting pipe 84, and the suction side bypass hole 32a. 12, it is excluded while being flowed back, and only the remaining part moves toward the discharge port 22 and is compressed, and this compressed gas is discharged into the casing 1 through the discharge port 22, so that only a part of the compressed gas is discharged to the condenser 2 Will move.

Here, when one end of the discharge-side bypass hole 32b is formed downstream from the discharge port, the entire refrigerant gas sucked into the internal space V of the cylinder 10 and the discharge-side bypass hole 32b are described during the compression process. The bypass connection pipe 84 and the suction side bypass hole 32a leak to the suction port 12, so that the compressor does not work.

On the other hand, the rotary compressor provided with the variable volume device of the present invention as described above may be reversely set the electric mechanism. That is, when the current is applied to the electromagnet 82b, the saving operation may be performed, but when the current is not applied, the power operation may be performed. However, this is mainly due to the characteristics of the air conditioner that performs the saving operation. It is inefficient.

In addition, the rotary compressor of the present invention is more preferably set to perform the saving operation at start-up, since it can reduce the power consumption.

In addition, in the present embodiment, a single rotary compressor having only one cylinder 10 has been described as an example, but in some cases, the cylinder 10 is provided in multiple layers, and either of the above-described volume variable units 80 is provided. You can also install

In this way, the refrigeration capacity in the capacity reduction mode can be arbitrarily set between 0% and 100%, so that air conditioning can be performed according to various conditions, and the capacity variable device in the compressor can be operated using an electromagnet having a low power consumption. By actively switching the operation mode while operating, the air conditioner's comfort is improved and the optimal air conditioning is performed according to the seasonal load, thereby improving the annual electricity consumption.

In addition, the cost can be significantly lowered compared to the inverter capability control method, and the system can be simplified, thereby increasing the reliability.

The variable-volume rotary compressor and the air conditioner using the same according to the present invention increase the refrigeration capacity reduction rate during the variable-variable operation of the compressor to enable various control of the air conditioner and reduce unnecessary power consumption of the compressor and the air conditioner employing the same.

In addition, it can be widely applied to a compressor or air conditioner having a frequent refrigeration capacity control function, as well as to improve the efficiency of the entire compressor or air conditioner employing the same.

Claims (14)

A casing having a gas suction pipe communicating with the evaporator and a gas discharge pipe communicating with the condenser; The rolling piston forms an inner space to compress the refrigerant during the pivoting movement, a suction port is formed to communicate with the gas suction pipe in the inner space, and a vane slit to support the vane that contacts the rolling piston to divide the inner space into a compression chamber and a suction chamber. A cylinder to form and install in the casing; A plurality of bearing plates covering the upper and lower sides of the cylinder to form an inner space together, forming a discharge port on one side, and forming bypass holes to communicate with both sides of the inner space of the cylinder on the other side; A discharge valve installed to open and close the discharge port of the bearing plate; A sliding valve slidingly inserted into a bypass hole of a bearing plate to selectively open and close the bypass hole according to an operation mode of the compressor; And The driving force of the electric mechanism is moved so that one end is coupled to the electric shaft and the other end is coupled to the sliding valve, and the sliding valve opens and closes the bypass hole according to the application of electric current. A variable displacement type rotary compressor including a valve driving means made of a connecting member for transmitting to a sliding valve. A casing having a gas suction pipe communicating with the evaporator and a gas discharge pipe communicating with the condenser; The rolling piston forms an inner space to compress the refrigerant during the pivoting movement, a suction port is formed to communicate with the gas suction pipe in the inner space, and a vane slit to support the vane that contacts the rolling piston to divide the inner space into a compression chamber and a suction chamber. A cylinder for forming a bypass hole so as to communicate with both sides of the inner space; A plurality of bearing plates covering both upper and lower sides of the cylinder to form an inner space together, and forming discharge holes on one side thereof; A discharge valve installed to open and close the discharge port of the bearing plate; A sliding valve slidingly inserted into the bypass hole of the cylinder to selectively open and close the bypass hole according to an operation mode of the compressor; And The driving force of the electric mechanism is moved so that one end is coupled to the electric shaft and the other end is coupled to the sliding valve, and the sliding valve opens and closes the bypass hole according to the application of electric current. A variable displacement type rotary compressor including a valve driving means made of a connecting member for transmitting to a sliding valve. delete delete The method according to claim 1 or 2, The power mechanism has an electromagnet that pulls the electric shaft and moves it in the longitudinal direction when an electric current is applied, and an elastic member which elastically supports one end of the electric shaft together with the connecting member to restore the electric shaft when the electric current is not applied. Rotary compressor. The method according to claim 1 or 2, The sliding valve has a variable capacity type, characterized in that it comprises a blocking portion for blocking the bypass hole, and a communication portion for opening the bypass hole by extending to one side of the blocking portion to form a gas flow path between the bypass hole. Rotary compressor. The method of claim 6, One end of the bypass hole is formed to communicate with the inlet, while the other end is formed in a position in communication with the inner space of the cylinder to be opened and closed by the sliding valve described above. delete The method according to claim 7 or 8, A variable capacity rotary compressor, characterized in that both ends of the bypass hole to communicate through a separate bypass connecting pipe. The method according to claim 7 or 8, A variable displacement rotary compressor, characterized in that both ends of the bypass hole are formed in the subframe or the cylinder. delete delete The variable displacement rotary compressor according to claim 1 or 2, wherein a cylinder is provided in multiple layers, and at least one of the cylinders has a bypass hole opened and closed by the volume variable unit. An air conditioner comprising the variable displacement rotary compressor of claim 1.

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