KR20180019187A - Compressor and heat exchange system - Google Patents

Abstract

The compressor includes a crankshaft 10, a first cylinder 20 which is a high-pressure cylinder sequentially arranged along the axial direction of the crankshaft 10, a second cylinder 30 which is a low-pressure cylinder and a third cylinder 40 (50) for controlling the unloading or loading of the third cylinder (40), the compressor having a full load operation mode and a partial load operation mode, and the compressor Under the full-load operation mode, the switching mechanism for capacity conversion 50 loads the third cylinder 40 under the action of the exhaust pressure of the compressor,
Under the partial load operation mode of the compressor, the switching mechanism for capacity conversion (50) unloads the third cylinder (40) under the action of the intake pressure of the compressor. And the compressor. By providing the switching mechanism for capacity conversion 50 in the compressor, one cylinder is used or unloaded under the action of the switching mechanism for capacity conversion 50 to have a switching function for capacity conversion of the compressor, It is possible to cope with the operating state, and the heating ability of the compressor can be improved in various operating states.

Description

Compressor and heat exchange system

FIELD OF THE INVENTION The present invention relates to the field of heat exchange technology, and more particularly to a compressor and a heat exchanger system.

Conventionally, a compressor having a two-stage enthalpy-increasing function improves the heating ability of the compressor through an electric auxiliary heat technique, and the compressor has a low heating capability in a low temperature condition Has solved the problem, but there are various problems.

  1. The method of improving the heating ability of the compressor through the electric auxiliary heating technique has a problem that the energy efficiency is lowered.

  2. Using a compressor with a two-stage enthalpy-increasing function can not control the displacement of the compressor, and assuming that the compressor's heating capacity and energy efficiency are secured at low-temperature operation, There is a problem in that the adaptability of the compressor to the operating state is low, which may cause the energy efficiency of the compressor to decrease during operation.

The main object of the present invention is to provide a compressor and a heat exchange system in order to solve the problem that the capacity of the conventional compressor can not be converted so that the heating capacity of the compressor is lowered and the energy efficiency is lowered.

According to an aspect of the present invention, there is provided a compressor. The compressor includes a crankshaft, a first cylinder, a second cylinder and a third cylinder sequentially arranged along the axial direction of the crankshaft, wherein the first cylinder is a high pressure end cylinder and the second cylinder and the third cylinder are a low pressure end cylinder Wherein the compressor further comprises a switching mechanism for capacity conversion, the switching mechanism for capacity conversion controls unloading or loading of the third cylinder, and the compressor has a full load operation mode and a partial load operation mode, Under the load operation mode, the switching mechanism for capacity conversion loads the third cylinder under the action of the exhaust pressure of the compressor, and under the partial load operation mode of the compressor, the switching mechanism for capacity conversion unloads the third cylinder under the action of the intake pressure of the compressor .

The switching mechanism for capacity conversion includes a pressure control portion selectively connected to an exhaust port or an air inlet of the compressor and a locking member for controlling the fitting state between the slip sheets of the third cylinder by the pressure control portion, When the control section is connected to the intake port of the compressor, when the slip sheet of the lock member and the third cylinder is locked so that the third cylinder is unloaded and the pressure control section is connected to the exhaust port of the compressor, And the third cylinder is unlocked.

Further, the switching mechanism for capacity conversion further includes an elastic return part, and the first end of the lock member and the slip sheet are locked or unlocked, and the elastic return part is provided at the second end formed opposite to the first end of the lock member And the pressure control part controls the pressure at the first end of the lock piece.

The first end of the voltage stabilizing branch circuit is connected to the intake port of the compressor and the second end of the voltage stabilizing branch circuit is connected to the second end of the lock member by a pressure .

The pressure control unit includes a first branch circuit having a first end connected to the inlet of the compressor and a second end controlling the pressure at the first end of the lock member; A second branch circuit connected at the first end to the exhaust port of the compressor and at the second end to control the pressure at the first end of the lock member; And a second on-off valve for controlling ON / OFF of the 2-branch circuit.

Further, the compressor further includes a mixer, the first intake port of the mixer is connected to the intake port of the second cylinder, the mixer exhaust port of the mixer is connected to the intake port of the first cylinder, and the second intake port of the mixer is the gas replenishment port.

Further, the compressor further includes a first spacer, and a first spacer is installed between the second cylinder and the third cylinder.

Further, the first spacer has a first spacer cavity connected to the exhaust port of the second cylinder, and the second cylinder further has an external communication port connected to the first spacer cavity, and the first inlet port of the mixer has an external communication port The first spacer cavity, the external communicating port of the second cylinder, the mixer, the intake port of the first cylinder, the first cylinder of the first cylinder, the first cylinder of the second cylinder, And the exhaust ports of the first cylinder are sequentially connected.

The third cylinder also has a first intermediate passage spaced apart from the compression chamber of the third cylinder and the compressor is installed between the first spacer and the third cylinder and has a first intermediate passage of the third cylinder and a first spacer cavity A second spacer provided at a side farther from the second cylinder of the third cylinder and having a first flange cavity and a first flange cavity provided in the exhaust port of the third cylinder and a second spacer communicating with the exhaust port of the third cylinder, And a second flange which is connected to both the first and second intermediate passages, wherein, under the full-load operation mode of the compressor, the intake port of the second cylinder, the exhaust port of the second cylinder, the first spacer cavity, The intake port of the first cylinder and the exhaust port of the first cylinder are sequentially connected and the intake port of the third cylinder is connected to the first cylinder through the exhaust port of the third cylinder, the first flange cavity, the first intermediate passage, Up is connected to the cavity.

The compressor further includes an enthalpy-increasing component coupled to the inlet of the first cylinder.

Further, the compressor further includes a first spacer provided between the second cylinder and the first cylinder, and a third spacer provided between the first cylinder and the first spacer.

The third spacer has a third spacer communicating hole. The first spacer has a first spacer cavity connected to the exhaust port of the second cylinder. The first spacer cavity communicates with the first spacer through the third spacer communicating hole. The first spacer cavity, the third spacer communicating hole, the inlet port of the first cylinder, and the exhaust port of the first cylinder are sequentially connected to the inlet port of the compressor, the inlet port of the second cylinder, the outlet port of the second cylinder, .

The third cylinder further comprises a first intermediate passage spaced from the compression chamber of the third cylinder and the second cylinder further comprises a second intermediate passage spaced from the compression chamber of the second cylinder, The passage is connected to the first spacer cavity and the compressor is provided between the second cylinder and the third cylinder and a second spacer communicating hole for connecting the first intermediate passage of the third cylinder and the second intermediate passage of the second cylinder And a first flange disposed at a side farther from the second cylinder of the third cylinder and having a first flange cavity, wherein the first flange cavity comprises a first cylinder having an exhaust port of the third cylinder and a first flange, The exhaust port of the second cylinder, the first spacer cavity, the inlet port of the first cylinder, and the exhaust port of the first cylinder are sequentially connected under the full-load operation mode of the compressor, and the third Is the inlet port of the cylinder is connected to the second intermediate passage and the first spacer cavity through the exhaust port, a first cavity, a flange, a first intermediate path, a second spacer communication hole of the third cylinder.

According to another aspect of the present invention, there is provided a heat exchange system. The heat exchange system is a compressor described later.

By using the technical solution of the present invention, by providing a switching mechanism for capacity conversion in a compressor, one cylinder is used under the action of a switching mechanism for capacity conversion or unloaded so that the compressor has a switching function for capacity conversion And it is possible to cope with various operating states, improve the heating ability of the compressor in various operating states, and improve the overall energy efficiency of the compressor in a favorable manner.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings are provided to provide a further understanding of the invention as a part of this application, and illustrative embodiments of the invention and the description thereof are intended to be illustrative of the invention and not to limit the scope of the invention. In the accompanying drawings,
1 is a view showing the operation principle of a heat exchange system under a full-load operation mode of a compressor according to the present invention.
2 is a view showing the operation principle of the heat exchange system under the partial load operation mode of the compressor according to the present invention.
3 is a schematic diagram showing an operating state of the switching mechanism for capacity conversion and the third cylinder according to the present invention at the time of locking.
4 is a schematic view showing an operating state of the switching mechanism for capacity conversion and the third cylinder according to the present invention.
5 is a schematic view showing an external structure of a compressor according to a first embodiment of the present invention.
Fig. 6 is a schematic view showing the internal structure of the compressor of Fig. 5;
7 is a schematic view of the refrigerant flow in the partial load operation mode of the compressor of FIG.
8 is a schematic diagram showing the flow of refrigerant under the full load operation mode of the compressor of FIG.
Fig. 9 is a schematic view showing a structure of a first spacer of the compressor of Fig. 6; Fig.
10 is a schematic view showing a structure of a second cylinder of the compressor of Fig.
Fig. 11 is a schematic view showing a structure of a third cylinder of the compressor of Fig. 6; Fig.
12 is a schematic view showing a structure of the first flange of the compressor of Fig.
13 is a schematic view showing the structure of the first flange cover plate of the compressor of Fig.
Fig. 14 is a schematic view showing a passage relationship after the first flange, the third cylinder, and the first flange cover plate of the compressor of Fig. 6 are engaged. Fig.
15 is a schematic view showing an external structure of a compressor according to a second embodiment of the present invention.
16 is a schematic view showing the internal structure of the compressor of Fig.
17 is a schematic view of the refrigerant flow in the partial load operation mode of the compressor of FIG.
Fig. 18 is a schematic diagram showing the flow of refrigerant under the full-load operation mode of the compressor of Fig. 16;
19 is a schematic view showing the structure of the first cylinder of the compressor of Fig. 16;
Fig. 20 is a schematic view showing the structure of the first spacer of the compressor of Fig. 16; Fig.
Fig. 21 is a schematic view showing the structure of a second cylinder of the compressor of Fig. 16; Fig.
In the drawings, the attached drawings include the following notations.

In the absence of contradiction, it is necessary to explain that the features of the embodiments and embodiments of the present application can be combined with one another. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

It should be noted that the following detailed description is provided for illustrative purposes only and is provided to further illustrate the present invention. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Unless specifically stated otherwise, the terms "internal / external" and the like used in the present invention mean internal / external to the outline of each component itself, but the present invention is not limited to these members.

The present invention provides a compressor and a heat exchange system in order to solve the problem that the capacity of a conventional compressor can not be operated due to its inability to operate so that the heating capacity of the compressor is lowered and energy efficiency is lowered. .

1 and 2, the heat exchange system includes a four-way valve 200, a first heat exchanger 300, a first throttle valve 400, a flash evaporator 500, a second throttle valve 600, The second heat exchanger 700 further includes a liquid divider 800 and an enthalpy increasing member 100 or a mixer 60 described later. The exhaust port of the compressor includes a four-way valve 200, Is connected to the four-way valve 200 through the heat exchanger 300, the first throttle valve 400, the flash evaporator 500, the second throttle valve 600 and the second heat exchanger 700, (200) is connected to the inlet of the compressor through the liquid distributor (800). The flash evaporator 500 is connected to the cylinder of the compressor through the enthalpy increasing member 100 or the mixer 60.

1 and 2, the compressor includes a crankshaft 10, a first cylinder 20, a second cylinder 30, and a third cylinder 30, which are sequentially arranged along the axial direction of the crankshaft 10, (40), the first cylinder (20) is a high pressure single cylinder, the second cylinder (30) and the third cylinder (40) are low pressure single cylinder, and the compressor further includes a capacity switching mechanism And the switching mechanism for capacity conversion 50 controls unloading or loading of the third cylinder 40. The compressor has a full load operation mode and a partial load operation mode and performs a capacity conversion The switching mechanism 50 for switching the capacity of the compressor loads the third cylinder 40 under the action of the exhaust pressure of the compressor and under the partial load operation mode of the compressor, (40).

It is necessary to explain that the high-pressure end cylinder is a cylinder having a higher atmospheric pressure than the low-pressure end cylinder, that is, the gas supplied from the low-pressure end cylinder is compressed again in the high-pressure end cylinder to generate the secondary compression gas. Likewise, a low-pressure single cylinder is a cylinder having a lower air pressure than a high-pressure single cylinder. Here, the high pressure or the low pressure should be understood as a relative concept regardless of the numerical range of the high pressure and the low pressure.

In the compressor, a switching mechanism for capacity conversion is provided so that at least one cylinder is used or unloaded under the action of the capacity switching mechanism (50) to provide a switching function for capacity conversion of the compressor, And has the advantage of improving the heating ability of the compressor in various operating states and improving the overall energy efficiency of the compressor favorably. In the operation mode of the full load operation mode and the partial load operation mode, the compressors are operated at different capacities and volume ratios by using the switching method for the capacity conversion, so that they are excellent in the ability to cope with various operation states and have a high total energy efficiency .

In the preferred embodiment shown in Figs. 1 and 2, the switching mechanism for capacity conversion 50 controls the loading or unloading of the third cylinder 40. Fig. The switching mechanism for capacity conversion 50 may selectively control the second cylinder 30 (not shown).

1 to 4, the switching mechanism for capacity conversion 50 includes a pressure control unit and a lock member 52, the pressure control unit is selectively connected to an exhaust port or an air inlet port of the compressor, When the pressure control portion is connected to the inlet port of the compressor, the lock member 52 and the slip sheet 41 of the third cylinder 40 control the engagement state of the slip sheet 41 of the first cylinder 52 and the slip sheet 41 of the third cylinder 40, The lock member 52 and the slip sheet 41 of the third cylinder 40 are unlocked when the third cylinder 40 is unloaded and the pressure control unit is connected to the exhaust port of the compressor, 3 cylinder 40 is loaded. Since the compressor has a high exhaust pressure and a low intake pressure, the slip sheet 41 of the lock member 52 and the third cylinder 40 is unlocked by the exhaust pressure of the compressor in the state shown in Fig. 1, 40 are loaded. That is, the third cylinder 40 is used. At this time, the compressor enters a full-load operation mode of two-stage compression, which is a large displacement and a small volume ratio. 2, the lock member 52 and the slip sheet 41 of the third cylinder 40 are locked by the intake pressure of the compressor to unload the third cylinder 40. In other words, it is not compressed but revolves. At this time, the compressor enters a partial load operation mode of two-stage compression, which is a small displacement and a large volume ratio.

3 and 4, the switching mechanism for capacity conversion 50 further includes an elastic returning part 53, and the first end of the lock member 52 and the slip sheet 41 The resilient return piece 53 is provided at the second end opposite to the first end of the lock member 52 and the pressure control part controls the pressure at the first end of the lock piece 52. [ The resilient returning part 53 is provided to provide the supporting member 52 with a supporting force for moving toward the one side of the slip sheet 41 under the action of the resilient returning part 53, The lock member 52 and the slip sheet 41 are unlocked and the compressor enters the full load operation mode.

The resilient return piece 53 is preferably a spring.

The lock member 52 of the present invention is a pin having a head portion formed therein. When the head portion of the pin is caught by the engaging groove of the slip sheet 41,

The switching mechanism 50 for capacitive conversion of the present invention further includes a voltage stabilizing branch circuit 54 to improve the pressure control on the lock member 52. The first end of the voltage stabilizing branch circuit 54 is connected to the non- And the second end of the voltage stabilizing branch circuit 54 provides a pressure at the second end of the locking member 52 (see Figures 1 and 2). Since the voltage stabilizing branch circuit 54 continuously provides the intake pressure of the compressor at the second end of the lock member 52, the first end of the lock member 52 is operated only under the action of the exhaust pressure of the compressor, So that the switching mechanism for capacity conversion 50 has an advantage of being easy to control.

In the preferred embodiment shown in Figs. 1 and 2, the pressure control section includes a first branch circuit 511, a first on-off valve 512 for controlling ON / OFF of the first branch circuit 511, Off valve 514 for controlling on / off of the first branch circuit 513 and the second branch circuit 513 and the first end of the first branch circuit 511 is connected to the inlet of the compressor The second end of the first branch circuit 511 controls the pressure at the first end of the lock member 52 and the first on-off valve 512 is installed in the first branch circuit 511, The first end of the branch circuit 513 is connected to the exhaust port of the compressor and the second end of the second branch circuit 513 controls the pressure at the first end of the lock member 52 and the second open / close valve 514 Is provided in the second branch circuit 513. The first branch circuit 511 is for supplying the exhaust pressure of the compressor to the lock member 52 and the second branch circuit 513 is for supplying the exhaust pressure of the compressor to the lock member 52, (52) and the slip sheet (41) are locked or unlocked.

The dotted line in the drawing indicates that the corresponding branch circuit is closed because the open / close valve corresponding to the branch circuit is in the off state.

According to the gas replenishing member, the present invention provides the following two specific embodiments. In the first embodiment, the compressor employs the mixer 60, and the second embodiment employs the enthalpy increase member 100 in the compressor. A specific implementation method thereof will be described as follows.

5 to 14, the compressor includes a mixer 60, a first intake port 61 of the mixer 60 is connected to an intake port of the second cylinder 30, The mixer exhaust port 62 of the mixer 60 is connected to the intake port of the first cylinder 20 and the second intake port 63 of the mixer 60 is the gas replenishment port. As described above, the flash evaporator 500 is connected to the second air inlet 63 of the mixer 60.

As shown in Fig. 5, the mixer 60 is installed outside the house 11 of the compressor. Thereby allowing the mixer 60 to be rationally disposed to occupy the internal space of the compressor.

As shown in FIG. 6, the housing 11 is provided with an upper case module 12 and a lower case 13 at both ends. The compressor includes a stator module 14, a rotor module 15 installed in the stator module 14, a first roller 21 installed in the first cylinder 20, a second roller 21 mounted in the second cylinder 30, A third roller 43 provided in the third cylinder 40 and a third spacer 16 provided between the second cylinder 30 and the first cylinder 20. The third roller 43 is disposed in the third cylinder 40,

6, the compressor further includes a second flange 900, and the second flange 900 is installed on one side of the first cylinder 20 remote from the second cylinder.

As shown in FIG. 6, the compressor further includes a first spacer 70, and a first spacer 70 is installed between the second cylinder 30 and the third cylinder 40. The compressor according to the present embodiment is configured such that the second cylinder 30 is of the down exhaust type and the mixer 60 (including the medium-pressure refrigerant) is installed outside and the medium-pressure refrigerant discharged from the low- The passage of the intake air is constituted by an outer line.

7, 9 and 10, the first spacer 70 has a first spacer cavity 71 connected to the exhaust port of the second cylinder 30, and the second cylinder 30 has the first spacer cavity 71 connected to the exhaust port of the second cylinder 30, And the first air inlet 61 of the mixer 60 is connected to the first spacer cavity 71 by the external communication hole 31. The first spacer cavity 71 is connected to the first spacer cavity 71 via the external communication hole 31,

8 to 14, the third cylinder 40 has a first intermediate passage 42 spaced apart from the compression chamber of the third cylinder 40, and the compressor includes a second spacer 80, The second spacer 80 is disposed between the first spacer 70 and the third cylinder 40 and the second spacer 80 is disposed between the third cylinder 40 and the second spacer 80. [ The first intermediate passage 42 further includes a second spacer communicating hole so that the first spacer passage communicates with the first spacer cavity 71 and the first flange 90 is spaced away from the second cylinder 30 of the third cylinder 40 And the first flange 90 is provided with a first flange cavity 91 and the first flange cavity 91 is connected to both the exhaust port of the third cylinder 40 and the first intermediate passage 42 .

The second spacer 80 and the first spacer 70 and the second cylinder 30 are formed in the first spacer cavity 71 with a refrigerant receiving chamber for accommodating the exhaust of the second cylinder 30 .

6, the compressor further includes a first flange cover plate 92, and the first flange 90 is interposed between the third cylinder 40 and the first flange cover plate 92, And a coolant accommodating chamber for accommodating the exhaust of the third cylinder 40 is formed in the flange cavity 91. [

The internal passage of the refrigerant is installed in the third cylinder 40, the first flange 90, the second spacer 80, the second cylinder 30, and the first spacer 70. The capacity conversion pressure control passage 44 is provided in the third cylinder 40, the first flange 90 and the first flange cover plate 92 in the capacity switching mechanism 50 of the compressor.

14, the third cylinder 40, the first flange 90, and the first flange cover plate 92 are all provided with the pressure control pressure control passage 44 Thereby controlling the pressure at the first end and the second end).

The first spacer cavity 71, the external communication hole 31 of the second cylinder 30, the mixer (not shown) of the second cylinder 30, the exhaust port of the second cylinder 30, 60, the intake port of the first cylinder 20, and the exhaust port of the first cylinder 20 are sequentially connected. At this time, the first on-off valve 512 is opened, the second on-off valve 514 is closed, and the compressor enters the double cylinder two-stage mode which is a small displacement amount and a large volume ratio. The refrigerant gas supplied from the liquid distributor 800 is transferred into the second cylinder 30 and the first compressed refrigerant gas is discharged into the first spacer cavity 71 to be supplied to the outer communicating port 31 of the second cylinder 30 The supplemental gas supplied from one side of the flash evaporator 500 is transferred into the second suction port 63 of the mixer 60 and mixed with the gas in the mixer 60, And is then discharged into the upper space of the house 11 and discharged through the exhaust pipe of the upper case module 12. [ Thus, the compressor ends the refrigerant compressing process of the refrigerant.

The first spacer cavity 71, the external communication hole 31 of the second cylinder 30, the mixer (not shown) of the second cylinder 30, the exhaust port of the second cylinder 30, The inlet of the first cylinder 20 and the outlet of the first cylinder 20 are sequentially connected and the inlet of the third cylinder 40 is connected to the outlet of the third cylinder 40 and the outlet of the first flange cavity 91 ), The first intermediate passage (42), and the first spacer cavity (71) through the second spacer communication hole. At this time, the second on-off valve 514 is opened, the first on-off valve 512 is closed, and the compressor enters a three-cylinder two-stage mode having a large displacement and a small volume ratio. The refrigerant gas supplied from the liquid distributor 800 is transferred into the second cylinder 30 and the first compressed refrigerant gas is discharged into the first spacer cavity 71 so that the refrigerant gas supplied from the liquid distributor 800 And the first compressed refrigerant gas is discharged into the first flange cavity 91 so that the refrigerant gas contained in the first flange cavity 91 flows into the first flange 90, 2 is supplied to the mixer 60 via the first spacer cavity 80 and the first spacer cavity 71 and the external communication hole 31 of the second cylinder 30 and at the same time the supplementary gas supplied from one side of the flash evaporator 500 Is mixed with the gas in the mixer 60 and then mixed together into the first cylinder 20 to be secondarily compressed and discharged into the upper space of the house 11 And is discharged through the exhaust pipe of the upper case module 12. [ Thus, the compressor ends the refrigerant compressing process of the refrigerant.

15 to 21, the compressor further includes an enthalpy increasing member 100, and the enthalpy increasing member 100 is connected to the intake port of the first cylinder 20. In the second embodiment, as shown in Figs. As described above, the flash evaporator 500 is connected to the enthalpy increase member 100. As shown in FIG. 16, the upper case module 12 and the lower case 13 are installed at both ends of the house 11. The compressor includes a stator module 14, a rotor module 15 installed in the stator module 14, a first roller 21 installed in the first cylinder 20, a second roller 21 mounted in the second cylinder 30, (33) and a third roller (43) provided in the third cylinder (40).

16, the compressor further includes a first spacer 70 and a third spacer 16, and the first spacer 70 is installed between the second cylinder 30 and the first cylinder 20 And the third spacer 16 is installed between the first cylinder 20 and the first spacer 70. The compressor according to the present embodiment has the structure in which the second cylinder 30 is of the upward exhaust type and the medium pressure refrigerant passage is installed in the house 11 and the third cylinder 40, the first flange 90, 80, the second cylinder 30, the first spacer 70, and the third spacer 16, respectively. The pressure control passage 44 for capacity change of the compressor is installed in the third cylinder 40, the first flange 90 and the first flange cover plate 92 (the first end portion of the lock member 52 and the second end portion The pressure of the end portion is controlled).

16, the compressor further includes a second flange 900, and the second flange 900 is installed on one side far from the second cylinder 30 of the first cylinder 20. As shown in Fig.

16, 19, and 20, the third spacer 16 has a third spacer communicating hole. The first spacer 70 has a first spacer cavity 71 connected to the exhaust port of the second cylinder 30 and the first spacer cavity 71 is connected to the exhaust port of the first cylinder 20 through the third spacer communication hole. And is connected to the intake port.

17 to 21, the third cylinder 40 has a first intermediate passage 42 spaced apart from the compression chamber of the third cylinder 40, and the second cylinder 30 has a second intermediate passage 42 spaced apart from the compression chamber of the third cylinder 40, The second intermediate passage 32 is connected to the first spacer cavity 71 and the compressor is connected to the second spacer 80. The second spacer 32 is connected to the first spacer cavity 71, And the second spacer 80 is disposed between the second cylinder 30 and the third cylinder 40 and the second spacer 80 is disposed between the third cylinder 40 and the third cylinder 40. [ The first intermediate passage 42 of the third cylinder 40 is connected to the second intermediate passage 32 of the second cylinder 30 and the first flange 90 is connected to the second intermediate passage 32 of the third cylinder 40 The first flange 90 is provided with a first flange cavity 91 and the first flange cavity 91 is provided at a position farther from the second cylinder 30 than the exhaust port of the third cylinder 40, 1 intermediate passage 42, respectively.

The first spacer 70, the third spacer 16 and the second cylinder 30 are formed in the first spacer cavity 71 with a refrigerant receiving chamber for accommodating the exhaust of the second cylinder 30 . The first flange 90, the third cylinder 40 and the first flange cover plate 92 are formed in the first flange cavity 91 with a refrigerant receiving chamber for accommodating the exhaust of the third cylinder 40.

The compressor is operated under the partial load operation mode by the intake port of the second cylinder 30, the exhaust port of the second cylinder 30, the first spacer cavity 71, the third spacer communication hole, the inlet port of the first cylinder 20, The exhaust ports of the first cylinder 20 are sequentially connected. At this time, the second on-off valve 514 is closed, the first on-off valve 512 is opened, and the compressor enters a two-cylinder two-stage mode having a small displacement and a large volume ratio. The refrigerant gas supplied from the liquid distributor 800 is transferred into the second cylinder 30 and the first compressed refrigerant gas is discharged into the first spacer cavity 71 and the gas supplemented from one side of the enthalpy increase member 100 And then discharged into the upper space of the house 11 and discharged through the exhaust pipe of the upper case module 12. [ Thus, the compressor ends the refrigerant compressing process of the refrigerant.

The first spacer cavity 71, the intake port of the first cylinder 20, the exhaust port of the second cylinder 30, the exhaust port of the second cylinder 30, the exhaust port of the second cylinder 30, And the intake port of the third cylinder 40 is connected to the exhaust port of the third cylinder 40 through the exhaust port of the third cylinder 40, the first flange cavity 91, the first intermediate passage 42, And is connected to the intermediate passage 32 and the first spacer cavity 71. At this time, the second on-off valve 514 is opened, the first on-off valve 512 is closed, and the compressor enters a three-cylinder two-stage mode having a large displacement and a small volume ratio. The refrigerant gas supplied from the liquid distributor 800 is transferred into the second cylinder 30 and the first compressed refrigerant gas is discharged into the first spacer cavity 71 so that the refrigerant gas supplied from the liquid distributor 800 The first compressed refrigerant gas is discharged into the first flange cavity 91 so that the refrigerant gas contained in the first flange cavity 91 flows into the first flange 90, The gas contained in the first spacer cavity 71 is supplied to the first spacer cavity 71 together with the gas supplemented from one side of the enthalpy increase member 100 through the second spacer 80, To be discharged into the upper space of the house 11 and discharged through the exhaust pipe of the upper case module 12. [ Thus, the compressor ends the refrigerant compressing process of the refrigerant.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the exemplary embodiments in accordance with the invention. As used herein, the singular forms "a," "an," and "the" include singular forms unless the context clearly dictates otherwise. Also, " comprises " and / or " comprising " when used in this specification are intended to specify the presence of stated features, steps, operations, members, modules and / or groups thereof.

The terms "first," "second," and the like used in the specification, claims, and the accompanying drawings are used for distinguishing from similar objects, and are not intended to describe a particular order or order. The embodiment of the present invention described herein is compatible with the data used as described above so that it can be implemented in an order other than described or illustrated herein.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, the invention is not limited thereto. And all changes, equivalents, and modifications falling within the scope of the technical idea and principle of the present invention are included in the protection scope of the present invention.

10, crankshaft; 11, House; 12, upper case module; 13, a lower case; 14, a stator module; 15, a rotor module; 16, a third spacer; 20, a first cylinder; 21, a first roller; 30, a second cylinder; 31, an external communication hole; 32, a second intermediate passage; 33, a second roller; 40, a third cylinder; 41, a slip sheet; 42, a first intermediate passage; 43, a third roller; 44, a pressure control passage for capacity conversion; 50, a switching mechanism for capacity conversion; 511, a first branch circuit; 512, a first opening / closing valve; 513, a second branch circuit; 514, a second open / close valve; 52, a locking member; 53, resilient return component; 54, a voltage stabilizing branch circuit; 60, mixer; 61, a first intake port; 62, mixer exhaust vent; 63, a second suction port; 70, a first spacer; 71, a first spacer cavity; 80, a second spacer; 90, a first flange; 91, a first flange cavity; 92, a first flange cover plate; 100, enthalpy increase member; 200, four-way valve; 300, a first heat exchanger; 400, a first throttle valve; 500, flash evaporator; 600, a second throttle valve; 700, a second heat exchanger; 800, liquid distributor; 900, the second flange.

Claims (14)

A first cylinder 20 which is a high pressure end cylinder sequentially arranged along the axial direction of the crankshaft 10; a second cylinder 30 and a third cylinder 40 which are low pressure end cylinders; The compressor comprising:
Further comprising a switching mechanism (50) for capacity conversion,
The switching mechanism for capacity conversion 50 controls unloading or loading of the third cylinder 40. The compressor has a full load operation mode and a partial load operation mode,
Under the full-load operation mode of the compressor, the switching mechanism for capacity conversion (50) loads the third cylinder (40) under the action of the exhaust pressure of the compressor,
Wherein the capacity switching mechanism (50) unloads the third cylinder (40) under the action of the intake pressure of the compressor under the partial load operation mode of the compressor. The method according to claim 1,
The switching mechanism for capacity conversion (50) includes a pressure control unit selectively connected to an exhaust port of the compressor or an inlet port of the compressor,
And a lock member (52) for controlling the fitting state of the third cylinder (40) between the slip sheets (41) by a pressure control unit,
When the pressure control unit is connected to the inlet port of the compressor, the slip sheet 41 of the lock member 52 and the third cylinder 40 is locked to unload the third cylinder 40, Wherein the lock member (52) and the slip sheet (41) of the third cylinder (40) are unlocked when the third cylinder (40) is connected to the exhaust port of the compressor. 3. The method of claim 2,
The switching mechanism for capacity conversion 50 further includes an elastic returning part 53. The first end of the locking member 52 and the slip sheet 41 are locked or unlocked and the elastic returning part 53 Is provided at a second end opposite the first end of the locking member (52) and the pressure control unit controls the pressure at the first end of the locking member (52). The method of claim 3,
Wherein said switching device for capacitive conversion further comprises a voltage stabilizing branch circuit and wherein a first end of said voltage stabilizing branch circuit is connected to an inlet of said compressor and said voltage stabilizing branch circuit ) Provides a pressure at the second end of the locking member (52). The method of claim 3,
The pressure control unit
A first branch circuit (511) having a first end connected to the inlet port of the compressor and a second end controlling the pressure at the first end of the locking member (52)
A first on-off valve 512 provided on the first branch circuit 511 for controlling ON / OFF of the first branch circuit 511,
A second branch circuit (513) having a first end connected to the exhaust port of the compressor and a second end controlling the pressure at the first end of the lock member,
And a second on-off valve (514) provided on the second branch circuit (513) for controlling on / off of the second branch circuit (513). 6. The method according to any one of claims 1 to 5,
Wherein the first air inlet port (61) of the mixer (60) is connected to the exhaust port of the second cylinder (30), and the mixer exhaust port (62) of the mixer (60) Is connected to the intake port of the cylinder (20), and the second intake port (63) of the mixer (60) is a gas replenishment port. The method according to claim 6,
Further comprising a first spacer (70)
Wherein the first spacer is installed between the second cylinder (30) and the third cylinder (40). 8. The method of claim 7,
The first spacer 70 has a first spacer cavity 71 connected to the exhaust port of the second cylinder 30 and the second cylinder 30 is connected to the first spacer cavity 71 The first air inlet 61 of the mixer 60 is connected to the first spacer cavity 71 through the external communication hole 31 and the partial load operation of the compressor The exhaust port of the second cylinder 30, the first spacer cavity 71, the external communication ports 31 of the two cylinders 30, the mixer 60 ), The intake port of the first cylinder (20), and the exhaust port of the first cylinder (20) are sequentially connected. 9. The method of claim 8,
The third cylinder (40) has a first intermediate passage (42) spaced from the compression chamber of the third cylinder (40)
The compressor is installed between the first spacer 70 and the third cylinder 40 and connects the first intermediate passage 42 of the third cylinder 40 to the first spacer cavity 71 A second spacer 80 having a second spacer communicating hole for the second spacer,
A first flange cavity 91 provided at one side of the third cylinder 40 at a position far from the second cylinder 30 and having a first flange cavity 91 formed in the exhaust port of the third cylinder 40, And a first flange (90) connected to the first intermediate passage (42)
The first spacer cavity 71 and the external communication port of the second cylinder 30 are connected to each other through the intake port of the second cylinder 30, the exhaust port of the second cylinder 30, 31), the mixer (60), the intake port of the first cylinder (20), and the exhaust port of the first cylinder (20) are sequentially connected, and the intake port of the third cylinder ) Is connected to the first spacer cavity (71) through the exhaust port of the first flange cavity (91), the first intermediate passage (42) and the second spacer communication hole. 6. The method according to any one of claims 1 to 5,
Further comprising an enthalpy increasing member (100) connected to an inlet of the first cylinder (20). 11. The method of claim 10,
A first spacer (70) installed between the second cylinder (30) and the first cylinder (20)
Further comprising a third spacer (16) installed between the first cylinder (20) and the first spacer (70). 12. The method of claim 11,
The third spacer 16 has a third spacer communicating hole,
The first spacer 70 has a first spacer cavity 71 connected to the exhaust port of the second cylinder 30 and the first spacer cavity 71 is connected to the first cylinder through the third spacer communication hole. (30), the exhaust port of the second cylinder (30), the first spacer cavity (71), the third spacer (20), and the third spacer A spacer communicating hole, an intake port of the first cylinder (20), and an exhaust port of the first cylinder (20) are sequentially connected. 13. The method of claim 12,
The third cylinder 40 has a first intermediate passage 42 spaced apart from the compression chamber of the third cylinder 40 and the second cylinder 30 has a compression stroke of the second cylinder 30 Further comprising a second intermediate passage (32) spaced from the chamber, the second intermediate passage (32) being connected to the first spacer cavity (71)
And a second intermediate passage (32) of the second cylinder (30) is provided between the second cylinder (30) and the third cylinder (40) , A second spacer (80) further comprising a second spacer communication hole for connecting the first spacer
Further comprising a first flange (90) provided on a side of the third cylinder (40) remote from the second cylinder (30) and having a first flange cavity (91)
The first flange cavity 91 is connected to both the exhaust port of the third cylinder 40 and the first intermediate passage 42 and is connected to the intake port of the second cylinder 30, The exhaust port of the second cylinder 30, the first spacer cavity 71, the inlet port of the first cylinder 20, and the exhaust port of the first cylinder 20 are sequentially connected, and the third cylinder 40 Is connected to the second intermediate passage (32) through the exhaust port of the third cylinder (40), the first flange cavity (91), the first intermediate passage (42) Is connected to the first spacer cavity (71). A heat exchange system comprising a compressor according to any one of claims 1 to 13.

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