CN107084133B

CN107084133B - Compressor and refrigerating device with same

Info

Publication number: CN107084133B
Application number: CN201710189478.7A
Authority: CN
Inventors: 冯利伟; 廖四清; 李傲寒; 曾令华
Original assignee: Guangdong Meizhi Precision Manufacturing Co Ltd
Current assignee: Guangdong Meizhi Precision Manufacturing Co Ltd
Priority date: 2017-03-27
Filing date: 2017-03-27
Publication date: 2022-12-09
Anticipated expiration: 2037-03-27
Also published as: CN107084133A

Abstract

The invention discloses a compressor and a refrigerating device with the same, wherein the compressor comprises: the air cylinder is provided with a first compression cavity, a sliding sheet groove and a second compression cavity, the first compression cavity is provided with a first air suction port and a first air exhaust port, the second compression cavity comprises a first cavity and a second cavity, and the first cavity is provided with a second air suction port and a second air exhaust port; a piston disposed within the first compression chamber; the sliding piece is movably arranged in the sliding piece groove; the sliding block is connected with the sliding piece and movably arranged in the second compression cavity, and the first cavity and the second cavity are respectively located on two sides of the sliding block. The compressor provided by the embodiment of the invention can meet the requirement of high cost performance, has the advantages of simple manufacture, safety and reliability, and has no influence on the back pressure of the sliding vane by the auxiliary compression cavity.

Description

Compressor and refrigerating device with same

Technical Field

The invention belongs to the technical field of compressor manufacturing, and particularly relates to a compressor and a refrigerating device with the same.

Background

The independent compression technology can greatly improve the energy efficiency of the refrigeration system, but an additional air cylinder is added, so that the cost of the compressor is increased more, and an improvement space exists.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. To this end, the invention proposes a compressor which is cost-effective.

The compressor according to the embodiment of the present invention includes: the air cylinder is provided with a first compression cavity, a sliding sheet groove and a second compression cavity, the first compression cavity is provided with a first air suction port and a first air exhaust port, the second compression cavity comprises a first cavity and a second cavity, and the first cavity is provided with a second air suction port and a second air exhaust port; a piston disposed within the first compression chamber; the sliding piece is movably arranged in the sliding piece groove; the sliding block is connected with the sliding piece and movably arranged in the second compression cavity, and the first cavity and the second cavity are respectively located on two sides of the sliding block.

The compressor provided by the embodiment of the invention can meet the requirement of high cost performance, has the advantages of simple manufacture, safety and reliability, and has no influence on the back pressure of the sliding vane by the auxiliary compression cavity.

According to the compressor of one embodiment of the present invention, the second chamber communicates with a suction side of the compressor.

Preferably, the vane slot is in communication with the second compression chamber, and the vane, the slider and the cylinder together define the first and second chambers.

Optionally, the second chamber is communicated with a suction side of the compressor, a communication port is arranged between the second compression chamber and the first suction port, and the second chamber is communicated with the first suction port through the communication port.

Optionally, the first chamber and the second chamber are located on one side of the slide sheet close to the communication port, and the second chamber is communicated with the communication port.

Optionally, the first cavity and the second cavity are located on one side of the sliding sheet far away from the communication port, a vent hole is formed in the sliding sheet, and the second cavity is communicated with the communication port through the vent hole.

Optionally, the number of the first cavities and the number of the second cavities are two, the first cavities are located on two sides of the sliding piece respectively, the second cavities are located on the same side of the sliding block, one of the second cavities is communicated with the communication port, and the sliding piece is provided with a vent hole for communicating the two second cavities.

Optionally, the slider can selectively block the communication port.

Optionally, an air duct is provided on the cylinder, one end of the air duct communicates with the second chamber, and the other end is adapted to communicate with a suction side outside a housing of the compressor.

According to the compressor of one embodiment of the invention, the second suction port is provided with a one-way conduction suction valve.

According to the compressor provided by the embodiment of the invention, the fit clearance between the two radially opposite side walls of the second compression cavity and the sliding block is a, so that the following conditions are met: a is more than 0 mu m and less than or equal to 30 mu m.

According to the compressor of one embodiment of the invention, the radius of the cylinder is R, the radius of the piston is R, and the length of the first cavity is t, then:

and the stroke L =2 (R-R) of the slider.

According to the compressor provided by the embodiment of the invention, the sliding block and the sliding sheet are of a split structure or are integrally formed.

The invention also proposes a refrigeration device comprising: a first heat exchanger, a second heat exchanger, a flash tank, a compressor as described in any of the above; the flash device is connected between one end of the first heat exchanger and one end of the second heat exchanger, an exhaust port of the flash device is connected with the second air suction port, the first exhaust port and the second exhaust port are connected with the other end of the first heat exchanger, and the first air suction port is connected with the other end of the second heat exchanger.

The refrigeration equipment has the same advantages of the compressor compared with the prior art, and the description is omitted.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of a compressor according to a first embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a schematic structural view of a compressor according to a second embodiment of the present invention;

fig. 4 is a schematic configuration diagram of a compressor according to a third embodiment of the present invention;

fig. 5 is a schematic structural view of a compressor according to a fourth embodiment of the present invention;

fig. 6 is a schematic configuration view of a compressor according to a fifth embodiment of the present invention;

FIG. 7 is a schematic view illustrating an operation of a compressor according to an embodiment of the present invention;

FIG. 8 is an exploded view of a slider and slider according to one embodiment of the present invention;

fig. 9 is a schematic structural view of a refrigerating apparatus according to an embodiment of the present invention.

Reference numerals:

the refrigerating apparatus (100) is provided with,

a compressor 1, a cylinder 10, a first compression chamber 11, a first suction port 11a, a first discharge port 11b, a second compression chamber 12, a first chamber 121, a second suction port 121a, a second discharge port 121b, a second chamber 122, a vane groove 13, a piston 14, a vane 15, a vent hole 151, a slider 16, a suction valve 17, a communication port 18, a vent passage 19,

the flash evaporator 2, the first heat exchanger 3, the second heat exchanger 4, the control valve 5, the first throttling element 6 and the second throttling element 7.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

First, a compressor 1 according to an embodiment of the present invention will be described with reference to fig. 1 to 9

As shown in fig. 1 to 8, a compressor 1 according to an embodiment of the present invention includes: cylinder 10, piston 14, slide 15 and slider 16.

Wherein, a first compression cavity 11, a sliding sheet groove 13 and a second compression cavity 12 are formed on the cylinder 10, and the sliding sheet groove 13 can extend along the inner and outer directions of the cylinder 10 and is communicated with the first compression cavity 11.

The piston 14 is disposed in the first compression chamber 11, and the piston 14 is capable of rolling along the inner wall of the first compression chamber 11, the first compression chamber 11 is formed with a first air inlet 11a and a first air outlet 11b, the sliding piece 15 is movably disposed in the sliding piece groove 13, and the head of the sliding piece 15 (i.e. the end of the sliding piece 15 adjacent to the center of the cylinder 10) is adapted to abut against or be connected to the outer peripheral wall of the piston 14.

The second compression chamber 12 includes a first chamber 121 and a second chamber 122, the first chamber 121 and the second chamber 122 are respectively located at two sides of the slider 16, for example, the first chamber 121 may be located at an outer side of the slider 16, i.e., a side away from a center of the cylinder 10, the second chamber 122 may be an inner side of the slider 16, i.e., a side close to the center of the cylinder 10, the vane slot 13 may communicate with the second compression chamber 12, and the vane 15, the slider 16, and the cylinder 10 together define the first chamber 121 and the second chamber 122.

As shown in fig. 7, the slider 16 is connected to the sliding vane 15, and the slider 16 is movably disposed in the second compression chamber 12, the slider 16 is equivalent to the piston 14 of the piston 14 type compressor 1, the second compression chamber 12 (specifically, the first chamber 121 of the second compression chamber 12) achieves a change in volume of the second compression chamber 12 through the reciprocating linear motion of the slider 16, so as to suck and compress the refrigerant, and the refrigerant is sucked from the second suction port 121a and discharged from the second discharge port 121 b. When the sliding sheet 15 moves along the sliding sheet groove 13, the sliding block 16 can be driven to reciprocate back and forth, and two sides of the second compression cavity 12 can be sealed by the main bearing and the auxiliary bearing which are positioned at two axial ends of the cylinder 10.

From this, can realize gaseous refrigerant injection on the single cylinder, be equivalent to additionally formed an auxiliary compression chamber (first chamber 121) outside main compression chamber (first compression chamber 11), and the auxiliary compression chamber does not have the influence to gleitbretter 15's backpressure, when promoting compressor 1's energy efficiency for compressor 1 makes simple, safe and reliable, and has greatly practiced thrift the cost. It is understood that the compressor 1 according to the embodiment of the present invention may also be a multi-cylinder compressor.

The compressor 1 provided by the embodiment of the invention can meet the requirement of high cost performance, has the advantages of simplicity in manufacturing, safety and reliability, and has no influence on the back pressure of the sliding vane 15 by the auxiliary compression cavity.

In some preferred embodiments of the present invention, as shown in fig. 1 to 6, the second chamber 122 is communicated with the suction side of the compressor 1, so that the gas in the second chamber 122 can be effectively prevented from becoming high pressure.

It can be understood that, once the second chamber 122 becomes high pressure due to the reciprocating motion of the slider 16, the second chamber 122 may generate an obstruction to the motion of the slider 16, thereby causing the sliding piece 15 to generate a phenomenon of being unsmooth to follow the piston 14, which may affect the normal operation of the first compression chamber 11. Meanwhile, since the second chamber 122 is communicated with the suction side of the compressor 1, the effective length of the slider 16 is increased, thereby increasing the volume of the second compression chamber 12.

There are many ways in which the second chamber 122 communicates with the suction side of the compressor 1, and several will be described below.

In the first embodiment, referring to fig. 1 to 5, a communication port 18 is provided between the second compression chamber 12 and the first air intake port 11a, the second chamber 122 is communicated with the first air intake port 11a through the communication port 18, the communication port 18 is located on the cylinder 10 and penetrates through the second chamber 122 and the first air intake port 11a, the communication port 18 may be located at an outer corner of the second chamber 122, which is far away from the first chamber 121, the slider 16 may selectively block the communication port 18, and when the slider 16 moves to the farthest air intake stroke, the slider 16 may block the communication port 18.

As shown in fig. 1 to 3, the first chamber 121 and the second chamber 122 are located on the side of the slider 15 close to the communication port 18, and the second chamber 122 communicates with the communication port 18. That is, the second intake port 121a, the second exhaust port 121b, and the effective portion (the right portion in fig. 1) of the slider 16 are provided on the side of the vane 15 close to the first intake port 11a, so that the communication path between the second chamber 122 and the first intake port 11a is short, and the processing is simple.

Of course, the arrangement positions of the first chamber 121 and the second chamber 122 are not limited to the above embodiment, as shown in fig. 4, the first chamber 121 and the second chamber 122 are located on the side of the slide 15 away from the communication port 18, the slide 15 is provided with the vent hole 151, and the second chamber 122 is communicated with the communication port 18 through the vent hole 151. That is, the second air inlet 121a, the second air outlet 121b, and the effective portion (the right portion in fig. 1) of the slider 16 are provided on the side of the slide piece 15 away from the first air inlet 11a, and the vent hole 151 penetrates the slide piece 15 to communicate the second chamber 122 and the communication port 18.

In another embodiment, as shown in fig. 5, two first cavities 121 and two second cavities 122 are provided, each first cavity 121 may be provided with a respective second air outlet 121b and a respective second air inlet 121a, the two first cavities 121 are respectively located at two sides of the sliding piece 15, the two second cavities 122 are located at the same side of the sliding block 16, one of the second cavities 122 is communicated with the communication port 18, and the sliding piece 15 is provided with an air vent 151 communicating the two second cavities 122.

In a second specific embodiment, with reference to fig. 6, the cylinder 10 is provided with an air duct 19, one end of the air duct 19 being in communication with the second chamber 122, the other end of the air duct 19 being suitable for communicating with the suction side outside the casing of the compressor 1.

The manner in which the second chamber 122 communicates with the suction side of the compressor 1 is not limited to the above-described ones.

According to an embodiment of the present invention, the second suction port 121a is provided with a suction valve 17, and the second exhaust port 121b is provided with an exhaust valve, wherein the suction valve 17 is in one-way conduction from outside to inside, and during the suction process, as the volume of the first cavity 121 of the second compression cavity 12 is increased, refrigerant vapor can push the suction valve 17 open and enter the second compression cavity 12 through the second suction port 121 a; in the exhaust process, since the volume of the first chamber 121 of the second compression chamber 12 is reduced, the gas in the first chamber 121 starts to be compressed, and when the pressure in the shell of the compressor 1 is reached, the exhaust valve is opened and the gas is exhausted through the second exhaust port 121 b.

According to one embodiment of the present invention, the two diametrically opposite side walls of the second compression chamber 12 have a fit clearance with the slider 16, which satisfies: a is more than 0 mu m and less than or equal to 30 mu m, so that when the slide block 16 reciprocates in the cavity, the slide block 16 is ensured not to collide with the side wall of the second compression cavity 12, knocking sound is prevented from being generated or the work of the first compression cavity 11 is prevented from being interfered, the gap between the slide block 16 and the side wall cannot be too large, otherwise, the clearance volume is increased, and the gap can be ensured through dimensional tolerance.

According to an embodiment of the present invention, as shown in fig. 1, when the radius of the cylinder 10 is R, the radius of the piston 14 is R, and the length of the first cavity 121 is t, the following conditions are satisfied:

and the stroke L =2 (R-R) of the slider 16.

According to one embodiment of the present invention, as shown in fig. 3, the slider 16 and the slider 15 may be integrally formed.

According to another embodiment of the present invention, as shown in fig. 1-2, 4-6 and 8, the slider 16 and the sliding piece 15 may be a split structure, so that the difficulty in manufacturing the slider 16 and the sliding piece 15 can be reduced. For example, the slider 16 and the sliding piece 15 may be connected by a screw thread or welded, or as shown in fig. 8, the slider 16 and the sliding piece 15 may be spliced, and the slider 16 and the sliding piece 15 are respectively provided with a slot, and the two slots are engaged.

The present invention also discloses a refrigeration apparatus 100100, as shown in fig. 9, the refrigeration apparatus 100100 includes: a first heat exchanger 3, a second heat exchanger 4, a flash tank 2 and a compressor 1, wherein the compressor 1 is the compressor 1 of any one of the above embodiments.

The flash tank 2 is connected between one end of the first heat exchanger 3 and one end of the second heat exchanger 4, an exhaust port g of the flash tank 2 is connected with the second suction port 121a, and the flash tank 2 is used for separating gas and liquid of the refrigerant in the two-phase region.

For example, the flash tank 2 may have a port e, a port f, and an exhaust port g, both the port e and the port f are immersed under the liquid level of the refrigerant in the flash tank 2, the port e is connected to one end of the second heat exchanger 44, the port f is connected to one end of the first heat exchanger 33, a gas phase space is provided in the flash tank 2, the exhaust port g may be provided at an upper portion of the flash tank 2 and connected to the gas phase space, the refrigerant vapor in the flash tank 2 may be connected to the second suction port 121a through the exhaust port g, a check element may be provided between the exhaust port g of the flash tank 2 and the second suction port 121a, the check element may be in one-way communication from the flash tank 2 to the second suction port 121a, or an intake valve 17 in one-way communication from the flash tank 2 to the first cavity 121 may be directly provided at the second suction port 121a to prevent the refrigerant from flowing backwards.

The first exhaust port 11b and the second exhaust port 121b are connected to the other end of the first heat exchanger 3, and the first intake port 11a is connected to the other end of the second heat exchanger 4.

Further, the refrigerating apparatus 100 further comprises a first throttling element 6 and a second throttling element 7, the first throttling element 6 being connected between said one end of the first heat exchanger 3 and the port f of the flash-chamber 2, the second throttling element 7 being connected between said one end of the second heat exchanger 4 and the port e of the flash-chamber 2. The first throttling element 6 and the second throttling element 7 are used for throttling and depressurizing the refrigerant in the refrigeration device 100.

Further, according to the actual demand of the refrigeration apparatus 100, the refrigeration apparatus 100 may further include: the valve 5, for example a four-way valve, is controlled for the purpose of cold-hot switching. Specifically, the control valve 5 has a valve port h connected to the first exhaust port 11b and the second exhaust port 121b, a valve port i connected to the other end of the first heat exchange unit, a valve port j connected to the other end of the second heat exchange unit, and a valve port k connected to the second suction port 121 a.

When the valve port h is communicated with the valve port i, and the valve port j is communicated with the valve port k, the refrigerating device 100 performs refrigeration, the first heat exchanger 3 is equivalent to a condenser, and the second heat exchanger 4 is equivalent to an evaporator; when the valve port h communicates with the valve port j, and the valve port i communicates with the valve port k, the refrigeration device 100 heats.

Of course, the control valve 5 may not be provided, and in this case, the refrigeration apparatus 100 may have only a refrigeration function.

If the refrigeration apparatus 100 includes the control valve 5, such as a four-way valve, and the refrigeration apparatus 100 switches from the cooling to the heating function, the refrigerant discharged after being compressed in the first compression chamber 11 and the second compression chamber 12 may be mixed and flow to the second heat exchanger 4, and then throttled by the second throttling element 7, the throttled gas-liquid mixture flows to the flash tank 2 to be separated, the separated gas is sucked into the second compression chamber 12 through the second suction port 121a to be compressed, the liquid is throttled again by the first throttling element 6 to the evaporation pressure and then flows into the first heat exchanger 3 to be evaporated, and finally, the evaporated low-pressure gas is superheated and then sucked into the first compression chamber 11 through the first suction port 11a to be compressed.

When the refrigerating device 100 has two functions of refrigerating and heating and is applied to an air conditioning system, the heating capacity of the air conditioning system in a low-temperature environment is greatly improved under the condition of large indoor and outdoor temperature difference, and the requirement of a user on heat can be effectively met.

The refrigerating device 100 provided by the embodiment of the invention can meet the requirement of high cost performance, and has the advantages of simple manufacture, safety and reliability.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A compressor, comprising:

the compressor comprises a cylinder, a first compression cavity, a sliding vane groove and a second compression cavity are formed in the cylinder, a first air suction port and a first air exhaust port are formed in the first compression cavity, the second compression cavity comprises a first cavity and a second cavity, a second air suction port and a second air exhaust port are formed in the first cavity, refrigerant outside the cylinder is suitable for being sucked into the first compression cavity from the first air suction port to be compressed and discharged from the first air exhaust port, the refrigerant outside the cylinder is suitable for being sucked into the second compression cavity from the second air suction port to be compressed and discharged from the second air exhaust port, and the second cavity is communicated with the air suction side of the compressor;

a piston disposed within the first compression chamber;

the sliding piece is movably arranged in the sliding piece groove, and the head of the sliding piece is suitable for being abutted or connected with the outer peripheral wall of the piston;

the sliding block is connected with the sliding piece and movably arranged in the second compression cavity, and the first cavity and the second cavity are respectively positioned at two sides of the sliding block;

the sliding sheet groove is communicated with the second compression cavity, the sliding sheet, the sliding block and the air cylinder jointly define the first cavity and the second cavity, the second cavity is communicated with the air suction side of the compressor, a communication port is arranged between the second compression cavity and the first air suction port, and the second cavity is communicated with the first air suction port through the communication port;

the first cavity and the second cavity are two, the first cavity is located on two sides of the sliding sheet respectively, the second cavity is located on the same side of the sliding block, one of the second cavity is communicated with the communication port, and the sliding sheet is provided with air holes for communicating the two second cavities.

2. The compressor of claim 1, wherein the slider selectively blocks the communication port.

3. The compressor of claim 1, wherein the cylinder is provided with an air passage, one end of the air passage is communicated with the second chamber, and the other end of the air passage is suitable for being communicated with a suction side outside a shell of the compressor.

4. A compressor according to any one of claims 1 to 3, wherein a suction valve is provided on the second suction port in one-way communication.

5. The compressor according to any one of claims 1 to 3, wherein the two diametrically opposite side walls of the second compression chamber have a fitting clearance with the slider, which satisfies: a is more than 0 mu m and less than or equal to 30 mu m.

6. A compressor according to any one of claims 1 to 3, wherein the radius of the cylinder is R, the radius of the piston is R, and the length of the first chamber is t, then:

and the stroke L =2 (R-R) of the slider.

7. The compressor of any one of claims 1 to 3, wherein the slider and the sliding vane are of a split structure or are integrally formed.

8. A refrigeration apparatus, comprising: a first heat exchanger, a second heat exchanger, a flash tank, a compressor according to any one of claims 1-7;

the flash device is connected between one end of the first heat exchanger and one end of the second heat exchanger, an exhaust port of the flash device is connected with the second air suction port, the first exhaust port and the second exhaust port are connected with the other end of the first heat exchanger, and the first air suction port is connected with the other end of the second heat exchanger.