CN111622929A - Piston heat control device for refrigerator compressor - Google Patents
Piston heat control device for refrigerator compressor Download PDFInfo
- Publication number
- CN111622929A CN111622929A CN202010306222.1A CN202010306222A CN111622929A CN 111622929 A CN111622929 A CN 111622929A CN 202010306222 A CN202010306222 A CN 202010306222A CN 111622929 A CN111622929 A CN 111622929A
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- Prior art keywords
- piston
- connecting rod
- heat
- compressor
- refrigerator
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Classifications
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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
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/06—Cooling; Heating; Prevention of freezing
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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
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
Abstract
The invention discloses a piston heat control device for a refrigerator compressor, wherein a piston is connected to a crank through a connecting rod, the connecting rod is rotatably connected in a connecting rod jack of the piston, the piston heat control device for the refrigerator compressor comprises a heat insulation piece and a piston cooling mechanism, the heat insulation piece is arranged on the end face of the piston, and the piston cooling mechanism can cool the piston. Due to the addition of the heat insulation piece, the heat insulation performance of the piston is improved, and the piston can be effectively prevented from conducting extra heat energy to the air in the chamber. Besides, the piston cooling mechanism can cool the piston, and can guide useless heat energy to the outside in time through heat exchange, and the measures can reduce the output power loss of the whole compressor, save energy and improve efficiency.
Description
Technical Field
The invention relates to a refrigerator compressor, in particular to a piston heat control device for a refrigerator compressor.
Background
Currently, the market is increasingly focusing on energy efficiency indexes, so that the performance requirements on the refrigerator compressor are higher and higher. The temperature of the piston can be gradually increased due to heat generated by friction in compressed air and the influence of a motor, the heat exchange between the inner end surface of the piston and the air in the piston hole and even in the whole refrigerator compressor cavity is remarkable, and the air temperature in the refrigerator compressor cavity can be increased along with the heat exchange, so that energy efficiency loss is generated, and the energy efficiency of the compressor is reduced. Therefore, how to provide a piston structure with good heat transfer control effect to improve the energy efficiency ratio of the compressor is a problem that needs to be solved by those skilled in the art. In order to solve this problem, production, research unit have put forward relevant improvement technical scheme a bit, and utility model specially does benefit to 2015 year 6 month 3 and discloses a thermal-insulated type piston top as the publication number is CN204371506U, including the piston top body, the lateral wall upper portion of piston top body is equipped with annular gas ring groove, the upper surface of piston top body is equipped with the first heat-insulating groove of interior concave structure, ring groove is left on the lateral wall upper portion of first heat-insulating groove, the draw-in groove inside callipers is equipped with the heat-resisting cover plate of elasticity stereoplasm, the inside second heat-insulating groove that leaves the annular form of lateral wall of piston top body, the piston top body bottom position that the second heat-insulating groove corresponds leaves the heat conduction hole that is the annular and distributes. This take piston top of heat-insulating groove all is equipped with the heat-insulating groove in piston top upper portion and lateral wall inside, can prevent high temperature in the combustion chamber and the high temperature that piston top and inner wall produced to link rod and articulate hot corrosion, prolonged the life of piston, the heat-insulating groove intussuseption is filled with the insulating layer and is used for absorbing the heat, helps increasing thermal-insulated effect, and this take piston top of heat-insulating groove is thermal-insulated effectual, and simple structure is fit for extensively using widely. But the utility model discloses do not take more effective measure to the self accuse heat of piston crown body.
Disclosure of Invention
The invention provides a piston heat control device for a refrigerator compressor, which has a good heat control effect and improves the energy efficiency ratio of the compressor, and aims to overcome the defect that the temperature of a piston can be increased and the energy efficiency of the compressor is reduced in the working process of the existing refrigerator compressor.
The technical scheme of the invention is as follows: the utility model provides a piston heat control device for refrigerator compressor, the piston passes through a connecting rod to be connected on a crank, and the connecting rod rotates to be connected in the connecting rod jack of piston, and this piston heat control device for refrigerator compressor includes heat insulating part and piston cooling mechanism, and the heat insulating part is located on the piston terminal surface, and piston cooling mechanism can cool down the piston. Because the heat insulation piece is added, the heat insulation performance of the piston is improved, and the conduction of extra heat energy on the piston to a chamber of a compressor of the refrigerator can be effectively reduced. Besides, the piston cooling mechanism can cool the piston, and can guide useless heat energy to the outside in time through heat exchange, and the measures can reduce the output power loss of the whole compressor, save energy and improve efficiency.
Preferably, the piston cooling mechanism comprises a connecting rod flow passage and two piston flow passages, the connecting rod flow passage is positioned in the connecting rod, the piston flow passage is arranged on the piston, the connecting rod flow passages are communicated with the piston flow passages and form a continuous cooling fluid passage, the upper end of each connecting rod flow passage is communicated with the upper end surface of the connecting rod, the lower end of each connecting rod flow passage is communicated with the peripheral surface of the connecting rod, and the lower ends of the two connecting rod flow passages have axial fall; the piston flow channel comprises two annular grooves and an inner through groove communicated with the two annular grooves, the two annular grooves are arranged on the inner circumferential surface of the connecting rod insertion hole in parallel and correspond to the lower ends of the two connecting rod flow channels one by one, and the inner through groove is positioned in the piston; and a sealing element is arranged between the peripheral surface of the connecting rod and the inner peripheral surface of the connecting rod insertion hole, and separates the outlets of the lower ends of the two connecting rod flow passages on the peripheral surface of the connecting rod. The cooling fluid is communicated with the cooling fluid channel, flows in a circulating mode and exchanges heat with the piston to take away all or part of extra heat energy generated by the movement of the piston, so that the temperature of the piston is maintained at a reasonable level, a large amount of heat energy is prevented from being input into the cavity of the compressor from the piston, the temperature of air in the cavity of the compressor is controlled to rise, and the energy efficiency loss of the compressor is reduced.
Preferably, a connector is arranged at the upper port of the connecting rod flow passage on the upper end surface of the connecting rod, and a hose is connected to the connector. The connecting rod flow channel extends outwards through the hose, so that the introduction and discharge of the cooling fluid is realized in the closed compressor. In the working process of the compressor, the connecting rod can reciprocate along with the piston, and the hose has flexibility and can be self-adjusted to adapt to the change of the distance between the connecting rod and the outside.
Preferably, the end face of the piston is provided with a groove, and the heat insulation piece is fixedly arranged in the groove. The heat insulation piece is embedded in the groove, so that the heat insulation piece can be reliably and radially positioned, and the heat insulation piece is favorably and fixedly mounted on the piston.
Preferably, the heat insulation piece is made of a material with the thermal conductivity coefficient of less than 20W/mk through processing or casting forming. The heat insulating member made of a material having a small thermal conductivity can increase the heat insulating effect.
Alternatively, the thermal insulation is made of plastic. Plastics are relatively poor in thermal conductivity and are relatively easy to process.
Preferably, the thermal insulation member is in interference fit with the groove. The heat insulation piece is fixed with the groove in a close-fitting mode, so that the fixing strength of the heat insulation piece can be increased, and the normal working safety of the piston heat control device for the refrigerator compressor is ensured.
Alternatively, the thermal insulation member is bonded in the groove. The adhesive is used for fixation, the operation is convenient, and the implementation is easy.
Alternatively, the insulation is riveted into the recess. The riveting mode is used for fixing, the operation is convenient, and the implementation is easy.
Preferably, the piston is made of iron-based powder metallurgy. The piston made by iron-based powder metallurgy is compact and uniform and has good heat resistance.
The invention has the beneficial effects that:
the heat control effect is good, and the energy efficiency ratio of the compressor is improved. The invention enhances the heat insulation performance and the temperature control effect of the piston due to the addition of the heat insulation piece and the piston cooling mechanism, and effectively prevents the piston from transmitting extra heat energy to the air in the cavity, thereby reducing the output power loss of the whole compressor, saving energy and improving efficiency.
Drawings
FIG. 1 is a schematic view of a cylinder block of a refrigerator compressor to which the present invention is applied;
FIG. 2 is an exploded view of a part of a cylinder block of a compressor for a refrigerator to which the present invention is applied;
FIG. 3 is a side view of the piston of the present invention;
FIG. 4 is a cross-sectional view of the piston of the present invention;
FIG. 5 is a schematic longitudinal sectional view of the connecting rod of the present invention;
FIG. 6 is a schematic view of a piston and connecting rod arrangement according to the present invention;
fig. 7 is a schematic longitudinal sectional view of the piston according to the present invention.
In the figure, 1-piston, 2-groove, 3-heat insulation piece, 4-connecting rod, 5-crank, 6-connecting rod flow channel, 7-piston flow channel, 8-connecting rod jack, 9-refrigerator compressor cylinder seat, 10-piston hole, 11-hose, 12-internal through groove, 13-upper sealing ring group, 14-lower sealing ring group, 15-connecting rod through groove and 16-crank through connecting hole.
Detailed Description
The invention is further illustrated by the following specific embodiments in conjunction with the accompanying drawings.
Example 1:
as shown in fig. 1 to 7, in the heat control device for the piston of the refrigerator compressor, the piston 1 is cylindrical, the piston 1 is connected to a crank 5 through a connecting rod 4, the connecting rod 4 is rotatably connected to the inside of a connecting rod insertion hole 8 of the piston 1, the connecting rod insertion hole 8 radially penetrates through the piston 1, the length of the connecting rod 4 is greater than the diameter of the piston 1, and the upper end of the connecting rod 4 is exposed out of the piston 1. The piston 1 is connected in a piston hole 10 on a cylinder seat 9 of the refrigerator compressor in a sliding way, and a connecting rod through groove 15 is also arranged on the cylinder seat 9 of the refrigerator compressor, so that the exposed part of the connecting rod 4 can move in the connecting rod through groove 15 when the connecting rod 4 reciprocates along with the piston 1. The central area of the piston 1 is provided with a waist-round crank through-connecting hole 16 for the crank 5 to penetrate and then to be connected with the connecting rod 4, the crank through-connecting hole 16 divides the connecting rod jack 8 into an upper section and a lower section, and the connecting rod 4 is provided with an upper retainer ring and a lower retainer ring for two shafts which respectively abut against the upper inner edge and the lower inner edge of the crank through-connecting hole 16. The piston 1 reciprocates in the piston bore 10 under the drive of the crank 5. The piston heat control device for the refrigerator compressor comprises a heat insulation piece 3 and a piston cooling mechanism, wherein a groove 2 is formed in the end face of the inner end of a piston 1, the heat insulation piece 3 is fixedly installed in the groove 2, and a through hole with the size of a crank penetrating hole 16 and the like is also formed in the central area of the heat insulation piece 3. The heat insulating member 3 is formed by punching a steel sheet having a thermal conductivity of 19W/mk. The heat insulation piece 3 is in interference fit with the groove 2. The piston 1 is made of iron-based powder metallurgy. The piston cooling mechanism comprises a connecting rod flow passage 6 and a piston flow passage 7, the connecting rod flow passage 6 is located inside the connecting rod 4, the piston flow passage is arranged on the piston 1, the connecting rod flow passage 6 is communicated with the piston flow passage 7 to form a continuous cooling fluid passage, and cooling fluid, namely compressed air in the embodiment, is introduced into the cooling fluid passage. The two connecting rod flow passages 6 are parallel to the axis of the connecting rod 4, one of the two connecting rod flow passages 6 is a connecting rod input flow passage, the other is a connecting rod output flow passage, the upper end of each connecting rod flow passage 6 is communicated with the upper end surface of the connecting rod 4 to form two connecting rod flow passage upper ports, one is a cooling fluid inlet, and the other is a cooling fluid outlet. The lower end of each connecting rod flow passage 6 is communicated to the circumferential surface of the connecting rod 4 to form two connecting rod flow passage lower ports, and the two connecting rod flow passage lower ports have axial fall from high to low; the piston flow channel 7 comprises an inflow groove, two annular grooves of an outflow groove and an inner through groove 12 communicated with the two annular grooves, the two annular grooves are arranged on the inner peripheral surface of the connecting rod insertion hole 8 in parallel and are in one-to-one correspondence with the lower ports of the two connecting rod flow channels, the inflow groove is positioned on the upper section of the connecting rod insertion hole 8 and is communicated with the connecting rod input flow channel, the outflow groove is positioned on the lower section of the connecting rod insertion hole 8 and is communicated with the connecting rod output flow channel, and the inner through groove 12 is embedded into the piston 1 and is not exposed out of the inner peripheral. The number of the inner through grooves 12 is two, one is arranged symmetrically left and right, each inner through groove 12 consists of an upper section, a middle section and a lower section, the upper section is formed by drilling on the circumferential surface of the piston 1 along the cross section of the piston 1 in the chord direction, and the upper section is communicated with the inflow groove; the lower section is drilled on the circumferential surface of the piston 1 along the chord direction of the cross section of the piston 1, and the lower section is communicated with the outflow groove; the middle section is drilled on the circumferential surface of the piston 1 along the chord direction of the cross section of the piston 1 and is communicated with the upper section and the lower section of the inner through groove 12, and each drilling opening of each section on the circumferential surface of the piston 1 is sealed by a threaded plug. A sealing element is arranged between the peripheral surface of the connecting rod 4 and the inner peripheral surface of the connecting rod jack 8, the sealing element comprises an upper sealing ring group 13 and a lower sealing ring group 14, the upper sealing ring group 13 consists of two sealing rings, one of the two sealing rings of the upper sealing ring group 13 is positioned above the inflow groove, and the other sealing ring is positioned below the inflow groove; the lower sealing ring set 14 is also composed of two sealing rings, one of the two sealing rings of the lower sealing ring set 14 is located above the outflow channel, and the other sealing ring is located below the outflow channel. Therefore, the sealing element separates the outlets of the lower ends of the two connecting rod flow passages 6 on the peripheral surface of the connecting rod 4, namely the lower ports of the two connecting rod flow passages; the inflow groove and the outflow groove can only be communicated through the inner through groove 12. The seal member forms a dynamic seal between the connecting rod 4 and the connecting rod insertion hole 8, and ensures a necessary seal without interfering with the relative rotation between the connecting rod 4 and the piston 1. The upper end opening of the connecting rod flow passage 6 on the upper end surface of the connecting rod 4 is provided with a joint, the joint is connected with a hose 11, the other end of the hose 11 is connected to a refrigerator compressor cylinder seat 9 through the joint, the refrigerator compressor cylinder seat 9 is provided with two circulation holes communicated with the inner wall and the outer wall of the refrigerator compressor cylinder seat 9, the two circulation holes are in one-to-one correspondence with the upper end openings of the two connecting rod flow passages 6, the outer end of one circulation hole is connected with an air pressure pump, and the outer end of the other.
When the refrigerator compressor works, the piston 1 reciprocates under the driving of the crank 5, and the generated additional heat energy is blocked by the heat insulation piece 3 and can be rarely conducted into the piston hole 10 and the air in the whole refrigerator compressor chamber, so that the loss of the output power of the whole compressor is reduced. In addition, the piston cooling mechanism can cool the piston 1, thereby further reducing the additional heat energy. The air pressure pump outputs compressed air, the compressed air enters the connecting rod input flow channel through a circulation hole in the air cylinder seat 9 of the refrigerator compressor and a hose 11 connected with the cooling fluid inlet, enters the butted inflow groove, enters the outflow groove through an inner through groove 12, enters the connecting rod output flow channel from the outflow groove, passes through the cooling fluid outlet and the hose 11 connected with the cooling fluid outlet, and finally is discharged into the atmosphere to complete a cycle. Because fresh air is continuously input and flows in the cooling fluid channel, the fresh air can continuously exchange heat with the piston 1, and the extra heat energy generated by the movement of the piston 1 is completely or partially taken away, so that the temperature of the piston 1 is maintained at a reasonable level, the heat energy is prevented from being input from the piston 1 to the compressor cavity, the temperature rise of the air in the compressor cavity is controlled, and the energy efficiency loss of the compressor is reduced.
Example 2:
the cooling fluid is water, the outer end of one circulation hole is connected with a cooling water pump, the outer end of the other circulation hole is connected with a recovery tank, and the recovery tank is connected with the cooling water pump through a water pipe. The heat insulating member 3 is bonded in the groove 2. The heat insulation member 3 is injection molded from plastic having a thermal conductivity of 0.04W/mk. The rest is the same as example 1.
Example 3:
the heat insulation piece 3 is riveted in the groove 2. The thermal shield 3 is made of thermally sprayed Al203 ceramic with a thermal conductivity of 8.7W/mk. The rest is the same as example 1.
Claims (10)
1. The utility model provides a refrigerator is piston accuse heat facility for compressor, piston (1) connect on a crank (5) through a connecting rod (4), and connecting rod (4) rotate to be connected in connecting rod jack (8) of piston (1), characterized by includes heat insulating part (3) and piston cooling mechanism, and on piston (1) terminal surface was located in heat insulating part (3), piston cooling mechanism can cool down piston (1).
2. The piston heat control device for the refrigerator compressor according to claim 1, wherein the piston cooling mechanism comprises a connecting rod flow passage (6) and a piston flow passage (7), the connecting rod flow passage (6) is positioned inside the connecting rod (4), the piston flow passage is arranged on the piston (1), the connecting rod flow passage (6) is communicated with the piston flow passage (7) and forms a continuous cooling fluid passage, the number of the connecting rod flow passages (6) is two, the upper end of each connecting rod flow passage (6) is communicated with the upper end surface of the connecting rod (4), the lower end of each connecting rod flow passage is communicated with the peripheral surface of the connecting rod (4), and the lower ends of the two connecting rod flow passages (6) have an axial; the piston flow channel (7) comprises two annular grooves and an inner through groove communicated with the two annular grooves, the two annular grooves are arranged on the inner peripheral surface of the connecting rod insertion hole (8) in parallel and correspond to the lower ends of the two connecting rod flow channels (6) one by one, and the inner through groove is positioned in the piston (1); and a sealing element is arranged between the peripheral surface of the connecting rod (4) and the inner peripheral surface of the connecting rod insertion hole (8), and separates the outlets of the lower ends of the two connecting rod flow passages (6) on the peripheral surface of the connecting rod (4).
3. The heat control device of the piston for the compressor of the refrigerator as claimed in claim 2, wherein the upper end of the connecting rod flow passage (6) on the upper end surface of the connecting rod (4) is provided with a joint, and the joint is connected with a hose.
4. The heat control device of the piston for the compressor of the refrigerator as claimed in claim 1, wherein the piston (1) has a recess (2) on the end surface thereof, and the heat insulating member (3) is fixedly installed in the recess (2).
5. The piston heat control device for a compressor of a refrigerator as claimed in claim 1, wherein the heat insulating member (3) is formed by machining or casting a material having a thermal conductivity of less than 20W/mk.
6. The heat control apparatus of a piston for a compressor of a refrigerator as claimed in claim 1, wherein the heat insulating member (3) is made of plastic.
7. The heat control device of the piston for the compressor of the refrigerator as claimed in claim 4, wherein the heat insulating member (3) is interference-fitted with the recess (2).
8. The heat controlling apparatus of a piston for a compressor of a refrigerator as claimed in claim 4, wherein the heat insulating member (3) is bonded in the recess (2).
9. The heat control device of a piston for a compressor of a refrigerator as claimed in claim 4, wherein the heat insulating member (3) is riveted in the recess (2).
10. The piston heat control apparatus for a compressor of a refrigerator as claimed in any one of claims 1 to 9, wherein the piston (1) is made of iron-based powder metallurgy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010306222.1A CN111622929A (en) | 2020-04-17 | 2020-04-17 | Piston heat control device for refrigerator compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010306222.1A CN111622929A (en) | 2020-04-17 | 2020-04-17 | Piston heat control device for refrigerator compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111622929A true CN111622929A (en) | 2020-09-04 |
Family
ID=72269644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010306222.1A Pending CN111622929A (en) | 2020-04-17 | 2020-04-17 | Piston heat control device for refrigerator compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111622929A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201236792Y (en) * | 2008-08-12 | 2009-05-13 | 于元 | Non-oil air compressor piston |
| CN203584738U (en) * | 2013-11-08 | 2014-05-07 | 克诺尔制动系统（大连）有限公司 | Water-cooled air compressor |
| CN204371506U (en) * | 2014-12-26 | 2015-06-03 | 大连滨城活塞制造有限公司 | A kind of heat insulation type piston top |
| CN204921293U (en) * | 2015-07-31 | 2015-12-30 | 江苏白雪电器股份有限公司 | Enclosed compressor |
| CN207485556U (en) * | 2017-05-23 | 2018-06-12 | 宝沃汽车（中国）有限公司 | A kind of vehicle, engine and piston connecting rod unit |
| CN208057363U (en) * | 2018-04-11 | 2018-11-06 | 鑫磊压缩机股份有限公司 | A kind of Piston Air Compressor piston |
-
2020
- 2020-04-17 CN CN202010306222.1A patent/CN111622929A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201236792Y (en) * | 2008-08-12 | 2009-05-13 | 于元 | Non-oil air compressor piston |
| CN203584738U (en) * | 2013-11-08 | 2014-05-07 | 克诺尔制动系统（大连）有限公司 | Water-cooled air compressor |
| CN204371506U (en) * | 2014-12-26 | 2015-06-03 | 大连滨城活塞制造有限公司 | A kind of heat insulation type piston top |
| CN204921293U (en) * | 2015-07-31 | 2015-12-30 | 江苏白雪电器股份有限公司 | Enclosed compressor |
| CN207485556U (en) * | 2017-05-23 | 2018-06-12 | 宝沃汽车（中国）有限公司 | A kind of vehicle, engine and piston connecting rod unit |
| CN208057363U (en) * | 2018-04-11 | 2018-11-06 | 鑫磊压缩机股份有限公司 | A kind of Piston Air Compressor piston |
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Application publication date: 20200904 |
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| RJ01 | Rejection of invention patent application after publication |