WO2017024865A1

WO2017024865A1 - Compressor and heat exchange system

Info

Publication number: WO2017024865A1
Application number: PCT/CN2016/084328
Authority: WO
Inventors: 胡余生; 魏会军; 吴健; 杨欧翔; 陈圣; 罗惠芳; 廖李平; 邹鹏
Original assignee: 珠海格力节能环保制冷技术研究中心有限公司
Priority date: 2015-08-10
Filing date: 2016-06-01
Publication date: 2017-02-16
Also published as: CN106704189A; JP6595700B2; EP3336359B1; KR101986965B1; US20180231000A1; EP3336359A1; KR20180019187A; EP3336359A4; JP2018523057A

Abstract

Disclosed is a compressor. The compressor comprises a crankshaft (10), and a first cylinder (20), a second cylinder (30) and a third cylinder (40) arranged sequentially in an axial direction of the crankshaft (10). The first cylinder (20) is a high-pressure cylinder, and the second cylinder (30) and the third cylinder (40) are low-pressure cylinders. The compressor also comprises a capacity variation switching mechanism (50) for controlling loading and unloading of the third cylinder (40). The compressor has a full operation mode and a partial operation mode. When the compressor is in the full operation mode, the capacity variation switching mechanism (50) loads the third cylinder (40) under the action of the discharge pressure of the compressor, and when the compressor is in the partial operation mode, the capacity variation switching mechanism (50) unloads the third cylinder (40) under the action of the inlet pressure of the compressor. Also disclosed is a heat exchange system comprising the compressor. With the capacity variation switching mechanism (50) provided in the compressor, at least one cylinders are allowed to be loaded or unloaded under the action of the capacity variation switching mechanism (50), thus enabling a capacity variation switching function of the compressor to meet operational requirements of different operating conditions and improve the heating capacity of the compressor under different operating conditions.

Description

Compressor and heat exchange system

Technical field

The invention relates to the field of heat exchange technology, in particular to a compressor and a heat exchange system.

Background technique

In the prior art, electric auxiliary heat is generally used to increase the heat generation of the compressor, or a compressor having a two-stage boosting function is used to solve the problem of poor low-temperature heating capability of the compressor, but there are different degrees of problems.

1. The method of using electric auxiliary heat to increase the heat generation of the compressor has the problem of low energy efficiency;

2. The compressor with double-stage boosting function can not adjust the displacement of the compressor, and the adaptability of the compressor to the operating conditions is poor. The heating capacity and energy efficiency of the compressor under low temperature conditions are guaranteed. Under the premise, the compressor will have a problem of reduced energy efficiency when operating under normal working conditions.

Summary of the invention

The main object of the present invention is to provide a compressor and a heat exchange system to solve the problem that the compressor of the prior art has poor heating capacity and low energy efficiency due to inability to change capacity.

In order to achieve the above object, according to an aspect of the invention, a compressor including a crankshaft and first, second, and third cylinders sequentially arranged along an axial direction of the crankshaft, the first cylinder being a high pressure cylinder, The second cylinder and the third cylinder are low-pressure cylinders, and the compressor further includes a variable-capacity switching mechanism, and the variable-capacity switching mechanism controls the third cylinder to be unloaded or loaded. The compressor has a full operation mode and a partial operation mode when the compressor is in full operation. In the mode, the variable capacity switching mechanism loads the third cylinder under the action of the exhaust pressure of the compressor; when the compressor is in the partial operation mode, the variable capacity switching mechanism causes the third cylinder under the action of the intake pressure of the compressor Uninstall.

Further, the variable capacity switching mechanism includes: a pressure control unit that selectively conducts with an exhaust port of the compressor or an intake port of the compressor; a lock member, the pressure control unit controls the lock member and the third The cooperation relationship of the sliding plates of the cylinder, when the pressure control portion is electrically connected to the intake port of the compressor, the locking member and the sliding plate of the third cylinder are locked to unload the third cylinder, when the pressure control portion and the compressor are arranged When the air port is turned on, the lock member is unlocked with the slider of the third cylinder to load the third cylinder.

Further, the variable capacity switching mechanism further includes an elastic returning element, the first end of the locking member is unlocked or locked with the sliding piece, and the elastic returning element is disposed on the second end of the locking member opposite to the first end, and the pressure The control unit controls the pressure of the first end of the lock member.

Further, the variable capacity switching mechanism further includes a voltage stabilizing branch, the first end of the voltage stabilizing branch is in communication with the air inlet of the compressor, and the second end of the voltage stabilizing branch provides pressure to the second end of the locking member.

Further, the pressure control portion includes: a first branch, the first end of the first branch is in communication with the intake port of the compressor, and the second end of the first branch controls the pressure of the first end of the lock member; The first on-off valve that controls the opening and closing of the first branch, the first on-off valve is disposed on the first branch; the second branch, the first end of the second branch is connected to the exhaust port of the compressor, and the second branch The second end of the road controls the pressure of the first end of the locking member; the second switching valve for controlling the opening and closing of the second branch, and the second switching valve is disposed on the second branch.

Further, the compressor further includes a mixer, the first intake port of the mixer is in communication with the exhaust port of the second cylinder, the mixer exhaust port of the mixer is in communication with the intake port of the first cylinder, and the mixer is The second air inlet is an air inlet.

Further, the compressor further includes a first partition disposed between the second cylinder and the third cylinder.

Further, the first baffle has a first baffle cavity communicating with the exhaust port of the second cylinder, and the second cylinder further has an external communication port communicating with the first baffle cavity, the first intake of the mixer The port communicates with the first partition cavity through the external communication port. When the compressor is in the partial operation mode, the intake port of the second cylinder, the exhaust port of the second cylinder, the first diaphragm cavity, and the second cylinder The external communication port, the mixer, the intake port of the first cylinder, and the exhaust port of the first cylinder are sequentially connected.

Further, the third cylinder has a first intermediate flow passage isolated from the compression chamber of the third cylinder, the compressor further includes: a second partition disposed between the first partition and the third cylinder, The second baffle further has a second baffle communication hole for communicating the first intermediate flow path of the third cylinder with the first baffle cavity; the first flange, the first flange is disposed away from the second cylinder of the third cylinder On one side, the first flange has a first flange cavity, and the first flange cavity is in communication with the exhaust port of the third cylinder and the first intermediate flow passage, when the compressor is in the full operation mode, the second The intake port of the cylinder, the exhaust port of the second cylinder, the first diaphragm cavity, the external communication port of the second cylinder, the mixer, the intake port of the first cylinder, and the exhaust port of the first cylinder are sequentially connected And the air inlet of the third cylinder communicates with the first diaphragm cavity through the exhaust port of the third cylinder, the first flange cavity, the first intermediate flow channel, and the second diaphragm communication hole.

Further, the compressor further includes an augmenting member that communicates with the intake port of the first cylinder.

Further, the compressor further includes: a first partition, the first partition is disposed between the second cylinder and the first cylinder; and the third partition, the third partition is disposed between the first cylinder and the first partition .

Further, the third baffle has a third baffle communication hole, the first baffle has a first baffle cavity communicating with the exhaust port of the second cylinder, and the first baffle cavity is connected through the third baffle The hole is in communication with the intake port of the first cylinder, and when the compressor is in the partial operation mode, the intake port of the second cylinder, the exhaust port of the second cylinder, the first diaphragm cavity, the third diaphragm communication hole, The intake port of the first cylinder and the exhaust port of the first cylinder are sequentially connected.

Further, the third cylinder has a first intermediate flow passage isolated from the compression chamber of the third cylinder, the second cylinder further has a second intermediate flow passage isolated from the compression chamber of the second cylinder, the second intermediate flow passage and the first The diaphragm cavity is connected, the compressor further includes: a second partition, the second partition is disposed between the second cylinder and the third cylinder, and the second partition further has a first intermediate flow passage of the third cylinder a second partition communicating hole communicating with the second intermediate flow passage of the two cylinders; the first flange, the first flange is disposed on a side of the third cylinder away from the second cylinder, and the first flange has a first flange a cavity, the first flange cavity is in communication with the exhaust port of the third cylinder and the first intermediate flow passage, and when the compressor is in the full operation mode, the intake port of the second cylinder, the exhaust port of the second cylinder, The first baffle cavity, the intake port of the first cylinder, the exhaust port of the first cylinder are sequentially connected, and the intake of the third cylinder The port communicates with the first partition cavity through the exhaust port of the third cylinder, the first flange cavity, the first intermediate flow path, the second partition communication hole and the second intermediate flow path.

According to another aspect of the present invention, there is provided a heat exchange system including a compressor, the compressor being a compressor described below.

By applying the technical solution of the present invention, by providing a variable capacity switching mechanism in the compressor, at least one cylinder is put into use or unloaded under the action of the variable capacity switching mechanism, so that the compressor has the function of variable capacity switching and can satisfy different functions. The operating requirements of the working conditions can improve the heating capacity of the compressor under different working conditions and effectively improve the overall energy efficiency of the compressor.

DRAWINGS

The accompanying drawings, which are incorporated in the claims of the claims In the drawing:

Figure 1 is a schematic view showing the operation of the heat exchange system of the compressor in the full operation mode of the present invention;

Figure 2 is a schematic view showing the operation of the heat exchange system of the compressor in the partial operation mode of the present invention;

FIG. 3 is a schematic view showing the working state of the variable displacement switching mechanism and the third cylinder when the third cylinder is locked in the present invention; FIG.

4 is a schematic view showing an operation state of the varactor switching mechanism and the third cylinder in the unlocking process of the present invention;

Figure 5 is a schematic view showing the appearance of a compressor in a first embodiment of the present invention;

Figure 6 is a schematic view showing the internal structure of the compressor of Figure 5;

Figure 7 is a schematic view showing the flow of refrigerant in the partial operation mode of the compressor of Figure 6;

Figure 8 is a schematic view showing the flow of refrigerant in the full operation mode of the compressor of Figure 6;

Figure 9 is a schematic view showing the structure of the first partition of the compressor of Figure 6;

Figure 10 is a schematic view showing the structure of the second cylinder of the compressor of Figure 6;

Figure 11 is a view showing the structure of the third cylinder of the compressor of Figure 6;

Figure 12 is a schematic view showing the structure of the first flange of the compressor of Figure 6;

Figure 13 is a view showing the structure of the first flange cover of the compressor of Figure 6;

Figure 14 is a schematic view showing the relationship between the first flange, the third cylinder and the first flange cover of the compressor of Figure 6;

Figure 15 is a view showing the appearance of a compressor in a second embodiment of the present invention;

Figure 16 is a view showing the internal structure of the compressor of Figure 15;

Figure 17 is a flow chart showing the flow of refrigerant in the partial operation mode of the compressor of Figure 16;

Figure 18 is a flow chart showing the flow of refrigerant in the full operation mode of the compressor of Figure 16;

Figure 19 is a view showing the structure of the first cylinder of the compressor of Figure 16;

Figure 20 is a view showing the structure of the first partition of the compressor of Figure 16;

Fig. 21 is a view showing the structure of the second cylinder of the compressor of Fig. 16.

Wherein, the above figures include the following reference numerals:

10, crankshaft; 11, housing; 12, upper cover assembly; 13, lower cover; 14, stator assembly; 15, rotor assembly; 16, third partition; 20, first cylinder; 21, first roller; 30, second cylinder; 31, external communication port; 32, second intermediate flow path; 33, second roller; 40, third cylinder; 41, sliding piece; 42, first intermediate flow path; Roller; 44, variable pressure control channel; 50, variable capacity switching mechanism; 511, first branch; 512, first switching valve; 513, second branch; 514, second switching valve; 52, locking 53; elastic reset element; 54, voltage stabilizing branch; 60, mixer; 61, first air inlet; 62, mixer exhaust port; 63, second air inlet; 70, first partition 71, a first partition cavity; 80, a second partition; 90, a first flange; 91, a first flange cavity; 92, a first flange cover; 100, a reinforced component; Four-way valve; 300, first heat exchanger; 400, first throttle valve; 500, flasher; 600, second throttle valve; 700, second heat exchanger; 800, liquid separator; Two flanges.

detailed description

It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments.

It should be noted that the following detailed description is illustrative and is intended to provide a further description of the application. 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 otherwise indicated.

In the present invention, the term "inner or outer" as used herein refers to the inside and outside of the outline of each component, and the above-mentioned orientation words are not intended to limit the present invention.

In order to solve the problem that the compressor of the prior art has poor heating capacity and low energy efficiency due to incapable of variable capacity operation, the present invention provides a compressor and a heat exchange system, wherein the heat exchange system includes a compressor The compressor is the compressor described below.

As shown in FIGS. 1 and 2, the heat exchange system further includes a four-way valve 200, a first heat exchanger 300, a first throttle valve 400, a flasher 500, a second throttle valve 600, and a second heat exchanger 700. The liquid separator 800 and the augmenting component 100 or the mixer 60 described below, wherein the exhaust port of the compressor passes through the four-way valve 200, the first heat exchanger 300, the first throttle valve 400, the flasher 500, The second throttle valve 600 and the second heat exchanger 700 are in communication with the four-way valve 200, and the four-way valve 200 is also in communication with the intake port of the compressor through the liquid separator 800. The flasher 500 is in communication with the cylinder of the compressor via the augmenting component 100 or mixer 60.

As shown in FIGS. 1 and 2, the compressor includes a crankshaft 10 and a first cylinder 20, a second cylinder 30, and a third cylinder 40 which are sequentially arranged along the axial direction of the crankshaft 10. The first cylinder 20 is a high pressure stage cylinder, and the second The cylinder 30 and the third cylinder 40 are at a low pressure level a cylinder, characterized in that the compressor further comprises a variable capacity switching mechanism 50, the variable capacity switching mechanism 50 controls the third cylinder 40 to be unloaded or loaded, and the compressor has a full operation mode and a partial operation mode, when the compressor is in the full operation mode, The variable capacity switching mechanism 50 loads the third cylinder 40 under the action of the exhaust pressure of the compressor; when the compressor is in the partial operation mode, the variable capacity switching mechanism 50 causes the third cylinder under the action of the intake pressure of the compressor. 40 uninstall.

It should be noted that the above-mentioned high-pressure stage cylinder refers to a cylinder in which the air pressure is higher than that of the low-pressure stage cylinder, that is, the gas supplied from the low-pressure stage cylinder is compressed again in the high-pressure stage cylinder to generate the second time. Compressed gas. Similarly, a low pressure stage cylinder refers to a cylinder in which the air pressure is lower relative to the high pressure stage cylinder. The high pressure or low pressure here is relatively comparative, regardless of the numerical range of high pressure and low pressure.

By providing a variable capacity switching mechanism in the compressor, at least one cylinder is put into use or unloaded by the variable capacity switching mechanism 50, so that the compressor has the function of variable capacity switching, and can meet the operation requirements of different working conditions, It can improve the heating capacity of the compressor under different working conditions and effectively improve the overall energy efficiency of the compressor. By adopting the method of variable capacity switching, the compressor can be operated with different capacity and volume ratio under the conditions of full operation mode and partial operation mode, so that the compressor has strong adaptability to different working conditions and high comprehensive energy efficiency. The advantages.

In the preferred embodiment illustrated in Figures 1 and 2, the variable capacity switching mechanism 50 is used to control the loading or unloading of the third cylinder 40. Of course, the variable capacity switching mechanism 50 can also selectively control the second cylinder 30 (not shown).

As shown in FIG. 1 to FIG. 4, the variable capacity switching mechanism 50 includes a pressure control portion and a lock member 52, and the pressure control portion is selectively connected to the exhaust port of the compressor or the intake port of the compressor; the pressure control portion Controlling the cooperation relationship between the locking member 52 and the sliding piece 41 of the third cylinder 40, when the pressure control portion is electrically connected to the intake port of the compressor, the locking member 52 and the sliding piece 41 of the third cylinder 40 are locked to make the first The three cylinders 40 are unloaded, and the lock member 52 and the slide 41 of the third cylinder 40 are unlocked to load the third cylinder 40 when the pressure control portion is electrically connected to the exhaust port of the compressor. Since the exhaust pressure of the compressor is high and the intake pressure of the compressor is low, the exhaust pressure of the compressor causes the lock member 52 and the slider 41 of the third cylinder 40 in the state shown in FIG. Unlocking, so that the third cylinder 40 is loaded, that is, put into use, at this time, the compressor realizes a full-displacement mode with large displacement and small volume ratio and two-stage compression; in the state shown in FIG. 2, the intake pressure of the compressor makes The locking member 52 is locked with the slider 41 of the third cylinder 40, so that the third cylinder 40 is unloaded, that is, it is idling without compression, and the compressor realizes a partial operation mode of small displacement and large volume ratio of two-stage compression.

In the embodiment shown in FIG. 3 and FIG. 4, the variable capacity switching mechanism 50 further includes an elastic returning member 53. The first end of the locking member 52 is unlocked or locked with the slide 41, and the elastic returning member 53 is disposed at the lock. The second end of the stop 52 opposite the first end, and the pressure control portion controls the pressure of the first end of the lock member 52. Since the elastic returning member 53 is provided, the locking member 52 is provided with a supporting force for the movement of the side of the slider 41 by the elastic returning member 53, when the exhaust pressure of the compressor overcomes the elastic returning member 53. When the work is done, the lock member 52 and the slide 41 are unlocked, thereby bringing the compressor into the full operation mode.

Preferably, the resilient return element 53 is a spring.

The locking member 52 in the present invention is a pin having a head, and when the head of the pin is engaged with the slot of the slider 41, both are locked.

In order to further improve the pressure control of the locking member 52, the variable capacity switching mechanism 50 of the present invention further includes a voltage stabilizing branch 54. The first end of the voltage stabilizing branch 54 communicates with the air inlet of the compressor. The second end of the path 54 provides pressure to the second end of the locking member 52 (please refer to Figures 1 and 2). Since the voltage stabilizing branch 54 always supplies the compressor inlet pressure to the second end of the lock member 52, it is ensured that the first end of the lock member 52 is only used with the discharge pressure of the compressor. The unlocking 41 makes the variable capacity switching mechanism 50 have an advantage of being easy to control.

In the preferred embodiment shown in FIGS. 1 and 2, the pressure control portion includes a first branch 511, a first switching valve 512 for controlling the opening and closing of the first branch 511, a second branch 513, and for controlling The second branch valve 513 is connected to the second switch valve 514. The first end of the first branch 511 is in communication with the intake port of the compressor, and the second end of the first branch 511 controls the first end of the lock member 52. The first switching valve 512 is disposed on the first branch 511; the first end of the second branch 513 is in communication with the exhaust port of the compressor, and the second end of the second branch 513 controls the locking member 52 The pressure at the first end; the second switching valve 514 is disposed on the second branch 513. The first branch 511 is for supplying the exhaust pressure of the compressor to the lock member 52, and the second branch 513 is for supplying the exhaust pressure of the compressor to the lock member 52 to realize the lock member 52 and the slide member The unlocking or locking of the sheet 41 is switched.

It should be noted that the broken line in the figure indicates that the on-off valve corresponding to the branch is in a closed state, and the branch is unreachable.

The present invention provides two specific embodiments depending on the gas supply components. In the first embodiment, the compressor employs a mixer 60. In the second embodiment, the compressor employs a reinforcing member 100. These two specific implementations are described separately below.

In the first embodiment, as shown in FIGS. 5 to 14, the compressor further includes a mixer 60, and the first intake port 61 of the mixer 60 communicates with the exhaust port of the second cylinder 30, the mixer 60 The mixer exhaust port 62 communicates with the intake port of the first cylinder 20, and the second intake port 63 of the mixer 60 is an air inlet. As described above, the flasher 500 is coupled to the second intake port 63 of the mixer 60.

As shown in FIG. 5, the mixer 60 is disposed outside the casing 11 of the compressor. This prevents the mixer 60 from occupying the internal space of the compressor, so that the two are properly laid out.

As shown in FIG. 6, the upper end of the housing 11 is further provided with an upper cover assembly 12 and a lower cover 13. The compressor further includes a stator assembly 14, a rotor assembly 15 disposed within the stator assembly 14, a first roller 21 disposed within the first cylinder 20, a second roller 33 disposed within the second cylinder 30, and a A third roller 43 in the three cylinders 40 and a third separator 16 disposed between the second cylinder 30 and the first cylinder 20 are provided.

As shown in FIG. 6, the compressor further includes a second flange 900 disposed on a side of the first cylinder 20 remote from the second cylinder 30.

As shown in FIG. 6, the compressor further includes a first partition 70, and the first partition 70 is disposed between the second cylinder 30 and the third cylinder 40. The compressor in this embodiment adopts a structure in which the second cylinder 30 is exhausted, the mixer 60 (with medium-pressure refrigerant therein) is externally disposed, and the medium-pressure refrigerant discharged from the low-pressure stage cylinder is taken to the intake passage of the high-pressure stage cylinder. It consists of an external pipe.

As shown in FIGS. 7, 9, and 10, the first partition plate 70 has a first partition cavity 71 that communicates with the exhaust port of the second cylinder 30, and the second cylinder 30 also has a cavity with the first partition plate. The 71-connected external communication port 31, the first air inlet 61 of the mixer 60 communicates with the first diaphragm cavity 71 through the external communication port 31.

As shown in FIGS. 8 to 14, the third cylinder 40 has a first intermediate flow passage 42 isolated from the compression chamber of the third cylinder 40, and the compressor further includes a second partition 80 and a first flange 90, the second partition The plate 80 is disposed between the first partition 70 and the third cylinder 40, and the second partition 80 further has a second partition that connects the first intermediate flow passage 42 of the third cylinder 40 with the first diaphragm cavity 71. a first flange 90 is disposed on a side of the third cylinder 40 remote from the second cylinder 30, and the first flange 90 has a first flange cavity 91, a first flange cavity 91 and a third cylinder 40 Both the exhaust port and the first intermediate flow path 42 are in communication.

Among them, the second partition 80, the first partition 70, and the second cylinder 30 cause the first partition cavity 71 to form a refrigerant containing chamber for accommodating the exhaust of the second cylinder 30.

As shown in FIG. 6, the compressor further includes a first flange cover 92 interposed between the third cylinder 40 and the first flange cover 92 such that the first flange cavity 91 A refrigerant accommodating chamber for accommodating the exhaust gas of the third cylinder 40 is formed.

Further, the internal flow path of the refrigerant is disposed on the third cylinder 40, the first flange 90, the second separator 80, the second cylinder 30, and the first separator 70. The variable pressure control passage 44 of the variable displacement switching mechanism 50 of the compressor is disposed on the third cylinder 40, the first flange 90, and the first flange cover 92.

As shown in FIG. 14, the third cylinder 40, the first flange 90 and the first flange cover 92 each have a variable pressure control passage 44 (control of the pressure of the first end and the second end of the lock member 52) .

When the compressor is in the partial operation mode, the intake port of the second cylinder 30, the exhaust port of the second cylinder 30, the first diaphragm cavity 71, the external communication port 31 of the second cylinder 30, the mixer 60, The intake port of one cylinder 20 and the exhaust port of the first cylinder 20 are sequentially connected. At this time, the first switching valve 512 is turned on, the second switching valve 514 is turned off, and the compressor is operated with a small displacement and a large volume ratio than the two-cylinder two-stage mode. The refrigerant gas supplied from the liquid separator 800 is sent into the second cylinder 30, and the refrigerant gas after the first compression is discharged into the first diaphragm cavity 71, and then passes through the external communication port 31 of the second cylinder 30. Entering into the mixer 60; at the same time, the supplemental gas supplied from the side of the flasher 500 is introduced into the second intake port 63 of the mixer 60, mixed with the gas in the mixer 60, and sent into the first cylinder 20 together. The second compression is performed, and then discharged to the upper space of the casing 11, and then discharged through the exhaust pipe of the upper cover assembly 12, until the compressor completes the entire compressor process of the refrigerant.

When the compressor is in the full operation mode, the intake port of the second cylinder 30, the exhaust port of the second cylinder 30, the first diaphragm cavity 71, the external communication port 31 of the second cylinder 30, the mixer 60, The intake port of one cylinder 20 and the exhaust port of the first cylinder 20 are sequentially connected, and the intake port of the third cylinder 40 passes through the exhaust port of the third cylinder 40, the first flange cavity 91, and the first intermediate portion The flow passage 42 and the second diaphragm communication hole communicate with the first diaphragm cavity 71. At this time, the second switching valve 514 is turned on, the first switching valve 512 is closed, and the compressor is operated with a large displacement and a small volume ratio three-cylinder two-stage mode. The refrigerant gas supplied from the liquid separator 800 is sent into the second cylinder 30, and the refrigerant gas after the first compression is discharged into the first diaphragm cavity 71; at the same time, the refrigerant supplied from the liquid separator 800 At the same time, it is sent into the third cylinder 40, and the refrigerant gas after the first compression is discharged to the first flange cavity 91, and the refrigerant gas in the first flange cavity 91 passes through the first flange 90, the second The partition 80, the first partition cavity 71, and the external communication port 31 of the second cylinder 30 enter the mixer 60; at the same time, the qi supplied from the side of the flasher 500 is introduced into the second of the mixer 60. The gas port 63 is mixed with the gas in the mixer 60 and sent to the first cylinder 20 for a second compression, and then discharged to the upper space of the casing 11, and then discharged through the exhaust pipe of the upper cover assembly 12, At this point the compressor completes the entire compressor process of the refrigerant.

In the second embodiment, as shown in FIGS. 15 to 21, the compressor further includes an augmenting member 100 that communicates with an intake port of the first cylinder 20. As described above, the flasher 500 is coupled to the augmentation component 100. As shown in FIG. 16, the upper end of the housing 11 is further provided with an upper cover assembly 12 and a lower cover 13. The compressor further includes a stator assembly 14, a rotor assembly 15 disposed within the stator assembly 14, a first roller 21 disposed within the first cylinder 20, a second roller 33 disposed within the second cylinder 30, and a The third roller 43 in the three cylinders 40.

As shown in FIG. 16, the compressor further includes a first partition 70 and a third partition 16, the first partition 70 is disposed between the second cylinder 30 and the first cylinder 20, and the third partition 16 is disposed at the first The cylinder 20 is between the first partition plate 70. The compressor in this embodiment adopts a structure of exhausting the second cylinder 30, and the intermediate pressure refrigerant flow passage is disposed inside the casing 11, and is respectively disposed in the third cylinder 40, the first flange 90, and the second partition. 80. The second cylinder 30, the first partition plate 70, and the third partition plate 16. The variable pressure control passage 44 of the compressor is disposed on the third cylinder 40, the first flange 90, and the first flange cover 92 (the pressure of the first end and the second end of the lock member 52 is controlled).

As shown in FIG. 16, the compressor further includes a second flange 900 disposed on a side of the first cylinder 20 remote from the second cylinder 30.

As shown in FIGS. 16, 19 and 20, the third partition plate 16 has a third partition plate communication hole, and the first partition plate 70 has a first partition plate cavity 71 communicating with the exhaust port of the second cylinder 30, And the first diaphragm cavity 71 communicates with the intake port of the first cylinder 20 through the third diaphragm communication hole.

As shown in FIGS. 17-21, the third cylinder 40 has a first intermediate flow passage 42 that is isolated from the compression chamber of the third cylinder 40, and the second cylinder 30 also has a second intermediate portion that is isolated from the compression chamber of the second cylinder 30. The flow passage 32, the second intermediate flow passage 32 communicates with the first partition cavity 71, the compressor further includes a second partition 80 and a first flange 90, and the second partition 80 is disposed at the second cylinder 30 and the third Between the cylinders 40, the second partition 80 further has a second partition communicating hole that communicates the first intermediate flow passage 42 of the third cylinder 40 with the second intermediate flow passage 32 of the second cylinder 30; the first flange 90 Disposed on a side of the third cylinder 40 remote from the second cylinder 30, the first flange 90 has a first flange cavity 91, a first flange cavity 91 and an exhaust port of the third cylinder 40 and a first intermediate portion The flow passages 42 are all connected.

Among them, the first partition plate 70, the third partition plate 16, and the second cylinder 30 form the first partition cavity 71 to form a refrigerant containing chamber for accommodating the exhaust gas of the second cylinder 30. The first flange 90, the third cylinder 40, and the first flange cover 92 form the first flange cavity 91 to form an exhaust refrigerant accommodating chamber for accommodating the third cylinder 40.

When the compressor is in the partial operation mode, the intake port of the second cylinder 30, the exhaust port of the second cylinder 30, the first diaphragm cavity 71, the third diaphragm communication hole, and the air inlet of the first cylinder 20 The exhaust ports of the first cylinders 20 are sequentially connected. At this time, the second switching valve 514 is closed, the first switching valve 512 is turned on, and the compressor operates with a small displacement and a large volume ratio than the two-cylinder two-stage mode. The refrigerant gas supplied from the liquid separator 800 is sent into the second cylinder 30, and the refrigerant gas after the first compression is discharged into the first diaphragm cavity 71, and is filled in with the side of the reinforcing member 100. The gas is fed into the first cylinder 20 for secondary compression, and then discharged to the upper space of the casing 11, and then discharged through the exhaust pipe of the upper cover assembly 12, until the compressor completes the entire compressor process of the refrigerant.

When the compressor is in the full operation mode, the intake port of the second cylinder 30, the exhaust port of the second cylinder 30, the first diaphragm cavity 71, the intake port of the first cylinder 20, and the row of the first cylinder 20 The air ports are connected in sequence, and the air inlets of the third cylinder 40 are open The exhaust port of the third cylinder 40, the first flange cavity 91, the first intermediate flow path 42, the second diaphragm communication hole, and the second intermediate flow path 32 communicate with the first diaphragm cavity 71. At this time, the second switching valve 514 is turned on, the first switching valve 512 is closed, and the compressor is operated with a large displacement and a small volume ratio three-cylinder two-stage mode. The refrigerant gas supplied from the liquid separator 800 is sent into the second cylinder 30, and the refrigerant gas after the first compression is discharged into the first diaphragm cavity 71; at the same time, the refrigerant supplied from the liquid separator 800 At the same time, it is sent into the third cylinder 40, and the refrigerant gas after the first compression is discharged to the first flange cavity 91, and the refrigerant gas in the first flange cavity 91 passes through the first flange 90, the second The partition 80 is fed into the first partition cavity 71; at this time, the gas in the first partition cavity 71 and the gas supplemented by the side of the reinforcing member 100 are fed into the first cylinder 20 to perform two. The secondary compression is then discharged to the upper space of the casing 11, and then discharged through the exhaust pipe of the upper cover assembly 12, until the compressor completes the entire compressor process of the refrigerant.

It is to be noted that the terminology used herein is for the purpose of describing particular embodiments, and is not intended to limit the exemplary embodiments. As used herein, the singular " " " " " " There are features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or order. It is to be understood that the data so used may be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A compressor comprising a crankshaft (10) and a first cylinder (20), a second cylinder (30) and a third cylinder (40) arranged in sequence along an axial direction of the crankshaft (10), the first cylinder (20) is a high pressure stage cylinder, the second cylinder (30) and the third cylinder (40) are low pressure stage cylinders, wherein the compressor further includes a variable capacity switching mechanism (50), A variable capacity switching mechanism (50) controls unloading or loading of the third cylinder (40), the compressor having a full operation mode and a partial operation mode,

The variable capacity switching mechanism (50) loads the third cylinder (40) under the action of the exhaust pressure of the compressor when the compressor is in the full operation mode;

The variable capacity switching mechanism (50) unloads the third cylinder (40) under the action of the intake pressure of the compressor when the compressor is in the partial operating mode.
The compressor according to claim 1, wherein said variable capacity switching mechanism (50) comprises:

a pressure control unit, wherein the pressure control unit is selectively electrically connected to an exhaust port of the compressor or an intake port of the compressor;

a locking member (52), the pressure control portion controls a cooperative relationship between the locking member (52) and a sliding piece (41) of the third cylinder (40), when the pressure control portion and the compression When the air inlet of the machine is turned on, the locking member (52) and the sliding piece (41) of the third cylinder (40) are locked to unload the third cylinder (40) when the pressure control The locking member (52) is unlocked from the sliding piece (41) of the third cylinder (40) when the exhaust port of the compressor is turned on to load the third cylinder (40).
The compressor according to claim 2, wherein said variable displacement switching mechanism (50) further comprises an elastic returning member (53), said first end of said locking member (52) and said slider ( 41) unlocking or locking, the elastic returning element (53) is disposed on a second end of the locking member (52) opposite the first end, and the pressure control portion controls the locking The pressure at the first end of the member (52).
The compressor according to claim 3, wherein said variable capacity switching mechanism (50) further comprises a voltage stabilizing branch (54), said first end of said stabilizing branch (54) and said compressing The air inlet of the machine is in communication, and the second end of the voltage stabilizing branch (54) provides pressure to the second end of the locking member (52).
The compressor according to claim 3, wherein said pressure control portion comprises:

a first branch (511), a first end of the first branch (511) is in communication with an intake port of the compressor, and a second end of the first branch (511) controls the lock The pressure at the first end of the member (52);

a first switching valve (512) for controlling the opening and closing of the first branch (511), the first switching valve (512) being disposed on the first branch (511);

a second branch (513), a first end of the second branch (513) is in communication with an exhaust port of the compressor, and a second end of the second branch (513) controls the lock The pressure at the first end of the member (52);

A second switching valve (514) for controlling the opening and closing of the second branch (513), the second switching valve (514) being disposed on the second branch (513).
The compressor according to any one of claims 1 to 5, wherein the compressor further comprises a mixer (60), a first intake port (61) of the mixer (60) An exhaust port of the second cylinder (30) is in communication, a mixer exhaust port (62) of the mixer (60) is in communication with an intake port of the first cylinder (20), and the mixer ( The second air inlet (63) of 60) is an air inlet.
The compressor according to claim 6, wherein said compressor further comprises a first partition (70), said first partition (70) being disposed in said second cylinder (30) and said Between the third cylinders (40).
The compressor according to claim 7, wherein said first partition (70) has a first partition cavity (71) communicating with an exhaust port of said second cylinder (30), The second cylinder (30) further has an external communication port (31) communicating with the first diaphragm cavity (71) through which the first air inlet (61) of the mixer (60) passes a communication port (31) is in communication with the first diaphragm cavity (71), and an intake port of the second cylinder (30) and the second cylinder (30) when the compressor is in a partial operation mode Exhaust port, the first baffle cavity (71), the external communication port (31) of the second cylinder (30), the mixer (60), the first cylinder (20) The intake port and the exhaust port of the first cylinder (20) are sequentially connected.
The compressor according to claim 8, wherein said third cylinder (40) has a first intermediate flow passage (42) isolated from a compression chamber of said third cylinder (40), said compressor Also includes:

a second partition (80), the second partition (80) is disposed between the first partition (70) and the third cylinder (40), and the second partition (80) is further a second diaphragm communication hole having the first intermediate flow passage (42) of the third cylinder (40) communicating with the first diaphragm cavity (71);

a first flange (90), the first flange (90) is disposed on a side of the third cylinder (40) remote from the second cylinder (30), the first flange (90) Having a first flange cavity (91), the first flange cavity (91) is in communication with the exhaust port of the third cylinder (40) and the first intermediate flow passage (42) The compressor is in the full operation mode, the intake port of the second cylinder (30), the exhaust port of the second cylinder (30), the first diaphragm cavity (71), the The external communication port (31) of the second cylinder (30), 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 (40) passes through the exhaust port of the third cylinder (40), the first flange cavity (91), and the first intermediate flow passage (42) The second spacer communication hole is in communication with the first spacer cavity (71).
The compressor according to any one of claims 1 to 5, wherein the compressor further comprises a tamping member (100), the tamping member (100) and the first cylinder (20) The air inlet is connected.
The compressor according to claim 10, wherein said compressor further comprises:

a first partition (70), the first partition (70) being disposed between the second cylinder (30) and the first cylinder (20);

a third partition (16), the third partition (16) being disposed between the first cylinder (20) and the first partition (70).
The compressor according to claim 11, wherein said third partition (16) has a third partition communicating hole, and said first partition (70) has said second cylinder (30) a first partition cavity (71) communicating with the exhaust port, and the first partition cavity (71) is in communication with the air inlet of the first cylinder (20) through the third partition communication hole When the compressor is in a partial operation mode, an intake port of the second cylinder (30), an exhaust port of the second cylinder (30), the first partition cavity (71), a The third diaphragm communication hole, the intake port of the first cylinder (20), and the exhaust port of the first cylinder (20) are sequentially connected.
The compressor according to claim 12, wherein said third cylinder (40) has a first intermediate flow passage (42) isolated from a compression chamber of said third cylinder (40), said second The cylinder (30) also has a second intermediate flow passage (32) isolated from the compression chamber of the second cylinder (30), the second intermediate flow passage (32) and the first diaphragm cavity (71) Connected, the compressor further includes:

a second partition (80), the second partition (80) is disposed between the second cylinder (30) and the third cylinder (40), and the second partition (80) further has a second partition communicating hole that communicates the first intermediate flow passage (42) of the third cylinder (40) with the second intermediate flow passage (32) of the second cylinder (30);

a first flange (90), the first flange (90) is disposed on a side of the third cylinder (40) remote from the second cylinder (30), the first flange (90) Having a first flange cavity (91), the first flange cavity (91) is in communication with the exhaust port of the third cylinder (40) and the first intermediate flow passage (42) The compressor is in the full operation mode, the intake port of the second cylinder (30), the exhaust port of the second cylinder (30), the first diaphragm cavity (71), the An intake port of the first cylinder (20), an exhaust port of the first cylinder (20) are sequentially connected, and an intake port of the third cylinder (40) passes through the third cylinder (40) An exhaust port, the first flange cavity (91), the first intermediate flow passage (42), the second diaphragm communication hole and the second intermediate flow passage (32) and the first A baffle cavity (71) is in communication.
A heat exchange system comprising a compressor, characterized in that the compressor is the compressor according to any one of claims 1 to 13.