CN112012916B - Piston type variable-frequency and variable-capacity refrigeration compressor - Google Patents
Piston type variable-frequency and variable-capacity refrigeration compressor Download PDFInfo
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- CN112012916B CN112012916B CN202010778481.4A CN202010778481A CN112012916B CN 112012916 B CN112012916 B CN 112012916B CN 202010778481 A CN202010778481 A CN 202010778481A CN 112012916 B CN112012916 B CN 112012916B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/16—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by adjusting the capacity of dead spaces of working chambers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/20—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the driving speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Compressor (AREA)
Abstract
The invention discloses a piston type variable-frequency variable-capacitance refrigeration compressor, which comprises a crankcase and a variable-capacitance device, wherein the crankcase is provided with an air cylinder and a drainage groove; the variable-capacitance device comprises a driving motor, a transmission shaft, an adjusting bolt and a connecting seat, the connecting seat is fixed with the crankcase, a containing hole is formed in the connecting seat, the containing hole is communicated with the air cylinder through a drainage groove, the adjusting bolt is arranged in the containing hole and is in threaded connection with the containing hole, one end of the transmission shaft is coaxially fixed with an output shaft of the driving motor, the other end of the transmission shaft is in sliding connection with the adjusting bolt, and the driving motor is fixed with the connecting seat. The invention provides a piston type variable-frequency variable-capacitance refrigeration compressor, which can further adjust the cold quantity of the compressor by adjusting the effective stroke volume of the compressor through a variable-capacitance device.
Description
Technical Field
The invention relates to the field of piston type variable frequency refrigeration compressors, in particular to a piston type variable frequency variable capacitance refrigeration compressor.
Background
With the development of national economy, the living standard of people is gradually improved. The requirements of common people on energy conservation, moisture preservation, fresh keeping and the like of refrigerators and freezers are higher and higher. The compressor is used as a core component of a refrigerator and a freezer and is the key for improving various qualities of the refrigerator. According to the characteristics of matching of the refrigerator and the compressor, the refrigerator has great difference on the refrigerating capacity demand of the compressor under different ambient temperatures. For example, in a refrigerator power consumption test, the refrigerator heat load under a 16-degree environment temperature test working condition is generally only about 50% of the refrigerator heat load under a 32-degree environment temperature test working condition. The existing design of the refrigerator generally requires that the matched variable frequency compressor meets the low-speed operation at 32-degree ring temperature, namely, the variable frequency compressor is kept to operate in the range of 900rpm to 2000rpm in an energy consumption test, so as to meet the control requirements of low energy consumption and low vibration noise of the refrigerator. This also results in a compressor that needs to be matched to deliver less than 900rpm of capacity at 16 ° ambient temperature of the refrigerator. However, the prior inverter refrigerator compressor in the industry is limited by large pump body vibration and difficult oil pumping lubrication at low rotating speed in design, and the minimum rotating speed design value is higher than 900rpm and even more than 1500 rpm. To ensure the performance and reliability of the inverter compressor. The minimum cold output by the compressor is always far larger than the cold actually required by the refrigerator under the working condition of low ring temperature. This situation causes two adverse effects in the refrigerator under low ambient temperature conditions: on one hand, the compartment of the refrigerator can not accurately control the temperature well, and the food moisturizing and fresh-keeping effects are poor; on the other hand, the cold quantity provided by the compressor is too large, so that the compressor is started and stopped more frequently, and the energy-saving effect is poor.
Disclosure of Invention
The invention provides a piston type variable-frequency variable-capacity refrigeration compressor, which aims to solve the problems that in the prior art, the temperature of a compartment of a refrigerator cannot be controlled accurately well, the food moisturizing and fresh-keeping effects are poor, and the compressor is started and stopped more frequently due to overlarge cold quantity provided by the compressor, so that the energy-saving effect is poor.
In order to achieve the purpose, the invention adopts the following technical scheme:
a piston type variable-frequency variable-capacitance refrigeration compressor comprises a crankcase and a variable-capacitance device, wherein the crankcase is provided with an air cylinder and a drainage groove; the variable-capacitance device comprises a driving motor, a transmission shaft, an adjusting bolt and a connecting seat, the connecting seat is fixed with the crankcase, a containing hole is formed in the connecting seat, the containing hole is communicated with the air cylinder through a drainage groove, the adjusting bolt is arranged in the containing hole and is in threaded connection with the containing hole, one end of the transmission shaft is coaxially fixed with an output shaft of the driving motor, the other end of the transmission shaft is in sliding connection with the adjusting bolt, and the driving motor is fixed with the connecting seat.
In the technical scheme, an adjustable cavity with adjustable volume is formed in the variable volume device, and the adjustable cavity is communicated with the cylinder and becomes a part of the clearance volume of the compressor; when the driving motor rotates forwards, the adjusting bolt is driven to move forwards, the volume of the adjustable containing cavity is reduced, the clearance volume of the compressor is reduced, and the cold output of the compressor is increased; when the driving motor rotates reversely, the adjusting bolt is driven to move backwards, the volume of the adjustable containing cavity is increased, the clearance volume of the compressor is increased, and the cold output of the compressor is reduced. The invention has the advantages and beneficial effects that: the piston type variable-frequency variable-capacity refrigeration compressor structure controls the rotating speed of the compressor through frequency conversion and adjusts the cold quantity of the compressor; the piston type variable-frequency and variable-capacity refrigeration compressor structure adjusts the size of the clearance volume of the compressor through the variable-capacity device, and adjusts the effective stroke volume of the compressor, thereby adjusting the cold quantity of the compressor; compared with the existing piston type variable frequency refrigeration compressor, the piston type variable frequency refrigeration compressor can further widen the cold quantity range, particularly can realize ultralow cold quantity output, and is favorable for further energy conservation and accurate temperature control of a refrigeration system of a refrigerator and a freezer; this piston frequency conversion varactor compressor can both keep higher efficiency in all cold volume sections, and simple structure, only need set up a varactor device on piston frequency conversion compressor can.
Preferably, the accommodating hole comprises a unthreaded hole and an internal threaded hole, the adjusting bolt comprises a polished rod section and an external threaded section, the external threaded section is in threaded connection with the internal threaded hole, and the polished rod section is matched with the unthreaded hole. The threaded structure can ensure that the adjusting bolt can translate relative to the connecting seat when rotating, and an adjustable cavity is formed in the unthreaded hole.
Preferably, the connecting seat is provided with an inclined through hole, one end of the inclined through hole is communicated with the drainage groove, and the other end of the inclined through hole is communicated with the unthreaded hole. The inclined through holes are used for connecting the drainage grooves and the unthreaded holes and ensuring the hole positions to be aligned.
Preferably, a second sealing groove is formed in the side wall, in contact with the crankcase, of the connecting seat, and a second sealing O-shaped ring is arranged in the second sealing groove. The structure can ensure the sealing performance of the joint of the connecting seat and the crankcase.
Preferably, the transmission shaft and the adjusting bolt are in sliding connection through a key groove structure. The structure enables the transmission shaft to drive the adjusting bolt to rotate and move relative to the adjusting bolt.
Preferably, the transmission shaft is connected with the adjusting bolt through a spline structure. The spline structure is stable, and the connection is reliable.
Preferably, a first sealing groove is formed in the side wall of the adjusting bolt, and a first sealing O-shaped ring is arranged in the first sealing groove. The structure can ensure the tightness of the adjustable cavity.
Preferably, one end of the drainage groove, which is communicated with the cylinder, is close to the end face of the cylinder. The structure can guarantee that when the piston is close to the valves, the accommodating cavity can be communicated with the cylinder hole.
Preferably, the drainage groove is obliquely arranged on the crankcase. The structure can facilitate the alignment of the connecting seat with the hole site of the crankcase.
The invention has the beneficial effects that: (1) the piston type variable-frequency variable-capacity refrigeration compressor structure controls the rotating speed of the compressor through frequency conversion and adjusts the cold quantity of the compressor; (2) the piston type variable frequency and variable capacity refrigeration compressor structure adjusts the clearance volume of the compressor through the variable capacity device, and adjusts the effective stroke volume of the compressor, thereby adjusting the cold quantity of the compressor; (3) compared with the existing piston type variable frequency refrigeration compressor, the piston type variable frequency and variable capacity refrigeration compressor can further widen the cold quantity range, particularly can realize ultralow cold quantity output, and is beneficial to further energy conservation and accurate temperature control of refrigeration systems of refrigerators and freezers; (4) this piston frequency conversion varactor compressor can both keep higher efficiency in all cold volume sections, and simple structure, only need set up a varactor device on piston frequency conversion compressor can.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a portion of the present invention;
FIG. 3 is a schematic view of the connecting socket of the present invention;
FIG. 4 is a schematic view of the construction of the adjusting bolt of the present invention;
fig. 5 is a partial structural view of embodiment 2.
In the figure: crankcase 1, cylinder 1.1, drainage groove 1.2, varactor 2, driving motor 2.1, transmission shaft 2.2, adjusting bolt 2.3, polished rod section 2.3.1, external screw thread section 2.3.2, first seal groove 2.3.3, connecting seat 2.4, accommodation hole 2.4.1, unthreaded hole 2.4.1, internal thread hole 2.4.1.2, inclined through hole 2.4.2, second seal groove 2.4.3, first sliding groove 11, second sliding groove 12, first slide bar 13, first locking inclined plane 13.1, second slide bar 14, second locking inclined plane 14.1, expanding spring 15.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
Example 1:
as shown in fig. 1, a piston type variable frequency and variable capacity refrigeration compressor comprises a shell assembly, a pump body assembly, a variable capacity device 2 and a variable frequency motor, wherein the pump body assembly comprises main parts such as an air suction and exhaust system, a crankcase 1, a crank-connecting rod-piston transmission device and the like. As shown in fig. 2, a crankcase 1 and a variable volume device 2, wherein the crankcase 1 is provided with a cylinder 1.1 and a drainage groove 1.2; varactor 2 includes driving motor 2.1, transmission shaft 2.2, adjusting bolt 2.3 and connecting seat 2.4, and connecting seat 2.4 is fixed with crankcase 1, the second seal groove 2.4.3 that is equipped with on the lateral wall of connecting seat 2.4 and the 1 contact of crankcase is equipped with the sealed O type circle of second in the second seal groove 2.4.3. As shown in fig. 3 and 4, a receiving hole 2.4.1 is formed in the connecting seat 2.4, the receiving hole 2.4.1 includes a unthreaded hole 2.4.1.1 and an internal threaded hole 2.4.1.2, the adjusting bolt 2.3 includes a polished rod section 2.3.1 and an external threaded section 2.3.2, the external threaded section 2.3.2 is in threaded connection with the internal threaded hole 2.4.1.2, the polished rod section 2.3.1 is matched with the unthreaded hole 2.4.1.1, a first sealing groove 2.3.3 is formed on the side wall of the adjusting bolt 2.3, a first sealing O-ring is formed in the first sealing groove 2.3.3, an inclined through hole 2.4.2 is formed in the connecting seat 2.4, one end of the inclined through hole 2.4.2 is communicated with a drainage groove 1.2, and the other end of the inclined through hole 2.4.2 is communicated with the unthreaded hole 2.4.1.1. One end of the drainage groove 1.2 communicated with the cylinder 1.1 is close to the end face of the cylinder 1.1, and one end of the drainage groove 1.2 communicated with the cylinder 1.1 is close to the end face of the cylinder 1.1; one end of the transmission shaft 2.2 is coaxially fixed with an output shaft of the driving motor 2.1, the other end of the transmission shaft 2.2 is in sliding connection with the transmission shaft 2.2 and the adjusting bolt 2.3 through a spline structure, and the driving motor 2.1 is fixed with the connecting seat 2.4.
In the technical scheme, an adjustable cavity with adjustable volume is formed in the variable volume device 2, and the adjustable cavity is communicated with the cylinder 1.1 and becomes a part of the clearance volume of the compressor; when the driving motor 2.1 rotates forwards, the adjusting bolt 2.3 is driven to move forwards, the volume of the adjustable containing cavity is reduced, the clearance volume of the compressor is reduced at the moment, and the cold output of the compressor is increased; when the driving motor 2.1 rotates reversely, the adjusting bolt 2.3 is driven to move backwards, the volume of the adjustable containing cavity is enlarged, the clearance volume of the compressor is enlarged, and the cold output of the compressor is reduced. The invention has the advantages and beneficial effects that: the piston type variable-frequency variable-capacity refrigeration compressor structure controls the rotating speed of the compressor through frequency conversion and adjusts the cold quantity of the compressor; the piston type variable frequency and variable capacity refrigeration compressor structure adjusts the clearance volume of the compressor through the variable capacity device 2, and adjusts the effective stroke volume of the compressor, thereby adjusting the cold quantity of the compressor; compared with the existing piston type variable frequency refrigeration compressor, the piston type variable frequency and variable capacity refrigeration compressor can further widen the cold quantity range, particularly can realize ultralow cold quantity output, and is beneficial to further energy conservation and accurate temperature control of refrigeration systems of refrigerators and freezers; this piston frequency conversion varactor compressor can both keep higher efficiency in all cold volume sections, and simple structure, only need set up a varactor device 2 on piston frequency conversion compressor can.
Example 2:
as shown in fig. 5, the slide rail further includes a first slide groove 11 and a second slide groove 12 in addition to embodiment 1; the first sliding groove 11 is arranged on the connecting seat 2.4, a first sliding rod 13 is arranged in the first sliding groove 11, the first sliding rod 13 is connected with the first sliding groove 11 in a sliding mode, a first locking inclined surface 13.1 is arranged at one end of the first sliding rod 13, and an adjusting bolt 2.3 at the other end of the first sliding rod 13 is connected in a contact mode; second sliding tray 12 runs through connecting seat 2.4 and crankcase 1, second sliding tray 12 and drainage groove 1.2 intercommunication, be equipped with second slide bar 14 and expanding spring 15 in the second sliding tray 12, second slide bar 14 and second sliding tray 12 sliding connection, expanding spring 15 cover is established in the second slide bar 14 outside, the one end and the second slide bar 14 of expanding spring 15 cover are connected, the other end and the connecting seat 2.4 or crankcase 1 of expanding spring 15 cover are connected, the one end of second slide bar 14 is equipped with second locking inclined plane 14.1, the other end of second slide bar 14 stretches into drainage groove 1.2 and sealed drainage groove 1.2, first locking inclined plane 13.1 and the contact of second locking inclined plane 14.1.
By means of the structure, the drainage groove 1.2 can be completely closed without increasing the clearance volume of the compressor, and the influence of the space in the drainage groove 1.2 on the clearance volume and the maximum refrigerating capacity is avoided. When the second sliding rod 14 is opened or closed, the clearance volume has a certain sudden change, so that the refrigerating capacity is changed, at the moment, the frequency of the compressor is controlled to be increased or decreased through the control system, the sudden change of the refrigerating capacity generated by the sudden change is compensated, and the refrigerating capacity can be accurately and smoothly transited.
Claims (9)
1. A piston type variable-frequency variable-capacitance refrigeration compressor is characterized by comprising a crankcase and a variable-capacitance device, wherein the crankcase is provided with an air cylinder and a drainage groove; the variable-capacitance device comprises a driving motor, a transmission shaft, an adjusting bolt and a connecting seat, the connecting seat is fixed with the crankcase, a containing hole is formed in the connecting seat, the containing hole is communicated with the air cylinder through a drainage groove, the adjusting bolt is arranged in the containing hole and is in threaded connection with the containing hole, one end of the transmission shaft is coaxially fixed with an output shaft of the driving motor, the other end of the transmission shaft is in sliding connection with the adjusting bolt, and the driving motor is fixed with the connecting seat;
the device also comprises a first sliding groove and a second sliding groove; the first sliding groove is formed in the connecting seat, a first sliding rod is arranged in the first sliding groove and is connected with the first sliding groove in a sliding mode, a first locking inclined plane is arranged at one end of the first sliding rod, and the other end of the first sliding rod is connected with an adjusting bolt in a contact mode; the second sliding groove runs through connecting seat and crankcase, second sliding groove and drainage groove intercommunication, be equipped with second slide bar and expanding spring in the second sliding groove, second slide bar and second sliding groove sliding connection, the expanding spring cover is established in the second slide bar outside, the one end and the second slide bar of expanding spring cover are connected, the other end and the connecting seat or the crankcase of expanding spring cover are connected, the one end of second slide bar is equipped with second locking inclined plane, the other end of second slide bar stretches into drainage groove and sealed drainage groove, first locking inclined plane and the contact of second locking inclined plane.
2. The piston type variable frequency and capacity refrigeration compressor as claimed in claim 1, wherein the receiving hole comprises an unthreaded hole and an internal threaded hole, the adjusting bolt comprises a polished rod section and an external threaded section, the external threaded section is in threaded connection with the internal threaded hole, and the polished rod section is matched with the unthreaded hole.
3. The piston type variable-frequency and variable-capacity refrigeration compressor as claimed in claim 2, wherein the connecting seat is provided with an inclined through hole, one end of the inclined through hole is communicated with the drainage groove, and the other end of the inclined through hole is communicated with the unthreaded hole.
4. The piston type variable-frequency and variable-capacity refrigeration compressor as claimed in claim 1, wherein a second sealing groove is formed in a side wall of the connecting seat, which is in contact with the crankcase, and a second sealing O-shaped ring is arranged in the second sealing groove.
5. The piston type frequency and capacitance conversion refrigeration compressor as claimed in claim 1, 2, 3 or 4, wherein the transmission shaft and the adjusting bolt are slidably connected through a key groove structure.
6. A piston-type frequency-conversion capacity-change refrigeration compressor as claimed in claim 5, wherein said transmission shaft is connected with the adjusting bolt by a spline structure.
7. The piston type variable frequency and capacity refrigeration compressor as claimed in claim 1, 2, 3 or 4, wherein a first sealing groove is formed on a side wall of the adjusting bolt, and a first sealing O-ring is arranged in the first sealing groove.
8. A piston type frequency and volume variable refrigeration compressor as claimed in claim 1, 2, 3 or 4, wherein the end of said drainage groove communicating with the cylinder is close to the end face of the cylinder.
9. The piston-type variable frequency and capacity refrigeration compressor as claimed in claim 8, wherein the drainage grooves are obliquely arranged on the crankcase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010778481.4A CN112012916B (en) | 2020-08-05 | 2020-08-05 | Piston type variable-frequency and variable-capacity refrigeration compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010778481.4A CN112012916B (en) | 2020-08-05 | 2020-08-05 | Piston type variable-frequency and variable-capacity refrigeration compressor |
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| Publication Number | Publication Date |
|---|---|
| CN112012916A CN112012916A (en) | 2020-12-01 |
| CN112012916B true CN112012916B (en) | 2022-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010778481.4A Active CN112012916B (en) | 2020-08-05 | 2020-08-05 | Piston type variable-frequency and variable-capacity refrigeration compressor |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113915875B (en) * | 2021-03-29 | 2023-01-06 | 海信冰箱有限公司 | Refrigerator and control method thereof |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4401417A (en) * | 1980-10-28 | 1983-08-30 | Eaton Corporation | Hydraulic pump and improved flow control valve assembly for use therein |
| JPH10122138A (en) * | 1996-10-14 | 1998-05-12 | Kobe Steel Ltd | Variable displacement type reciprocating compressor |
| US6945062B2 (en) * | 2003-12-04 | 2005-09-20 | Carrier Corporation | Heat pump water heating system including a compressor having a variable clearance volume |
| JP5210363B2 (en) * | 2010-08-17 | 2013-06-12 | 株式会社日本製鋼所 | Reciprocating compressor clearance pocket |
| CN104314824B (en) * | 2014-11-07 | 2017-02-22 | 广东美芝制冷设备有限公司 | Compressor and air conditioning system provided with same |
| CN107654355A (en) * | 2017-09-18 | 2018-02-02 | 珠海格力节能环保制冷技术研究中心有限公司 | Miniature reciprocating compressor, refrigeration system and refrigerator |
| CN108678930B (en) * | 2018-07-11 | 2023-10-03 | 珠海格力节能环保制冷技术研究中心有限公司 | Cylinder block and have its compressor |
| CN209179985U (en) * | 2018-10-18 | 2019-07-30 | 黄石东贝电器股份有限公司 | Compressor air-discharging valve group |
| CN210660822U (en) * | 2019-09-11 | 2020-06-02 | 蚌埠市正大压缩机有限公司 | Variable clearance positive displacement cylinder |
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