CN108980014B - Cylinder block assembly of piston compressor, piston compressor and refrigerating system - Google Patents
Cylinder block assembly of piston compressor, piston compressor and refrigerating system Download PDFInfo
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- CN108980014B CN108980014B CN201811068778.0A CN201811068778A CN108980014B CN 108980014 B CN108980014 B CN 108980014B CN 201811068778 A CN201811068778 A CN 201811068778A CN 108980014 B CN108980014 B CN 108980014B
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- compression chamber
- bypass hole
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- 238000007906 compression Methods 0.000 claims abstract description 100
- 230000006835 compression Effects 0.000 claims abstract description 98
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 238000005057 refrigeration Methods 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 7
- 230000030279 gene silencing Effects 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/122—Cylinder block
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Compressor (AREA)
Abstract
The invention provides a cylinder seat assembly of a piston compressor, the piston compressor and a refrigerating system. The cylinder block assembly includes: the cylinder body is provided with a compression cavity and an exhaust channel; and the variable capacity switching mechanism is arranged on the cylinder body and can enable the exhaust passage to be communicated with or disconnected from the compression cavity. By applying the technical scheme of the invention, the problem that the single-cylinder piston compressor in the prior art cannot be variable in capacity can be solved.
Description
Technical Field
The invention relates to the technical field of compressors, in particular to a cylinder seat assembly of a piston compressor, the piston compressor and a refrigerating system.
Background
In the prior art, a refrigerator compressor is divided into a fixed-frequency compressor and a variable-frequency compressor according to the rotating speed, and the fixed-frequency compressor operates at a fixed rotating speed, usually 50HZ. The design of the refrigerator compressor is usually aimed at a fixed working condition, and the running capacity (volume refrigerating capacity) of the refrigerator compressor is also fixed, so that the refrigerating capacity and power cannot be adjusted under different working conditions like a variable-frequency compressor, and the best matching requirements of different working conditions are met.
With the implementation of a new national standard of the refrigerator, the evaluation index of the power consumption of the refrigerator is formed by weighting the power consumption under two working conditions, and for the fixed-frequency compressor, the fixed refrigerating capacity of the fixed-frequency compressor not only meets the power consumption requirements under the two working conditions, but also has severe working conditions such as a cooling test. Therefore, the refrigerator needs to be provided with a compressor capable of meeting the maximum load refrigerating capacity, and the compressor meeting the large refrigerating capacity can cause the waste of the compression refrigerating capacity under the small load working condition of the refrigerator, the starting and stopping times of the refrigerator are increased, and the running power of the compressor is high, so that the power consumption is not beneficial to optimization of the power consumption.
Disclosure of Invention
The invention mainly aims to provide a cylinder seat assembly of a piston compressor, the piston compressor and a refrigerating system, so as to solve the problem that a single-cylinder piston compressor in the prior art cannot be variable-capacity.
In order to achieve the above object, according to one aspect of the present invention, there is provided a cylinder block assembly of a piston compressor, comprising: the cylinder body is provided with a compression cavity and an exhaust channel; and the variable capacity switching mechanism is arranged on the cylinder body and can enable the exhaust passage to be communicated with or disconnected from the compression cavity.
Further, the variable capacitance switching mechanism includes: the bypass hole is arranged on the inner wall of the compression cavity; a switching structure connected to the bypass hole, the switching structure having a first state in which the bypass hole communicates with the compression chamber and a second state in which the bypass hole is disconnected from the compression chamber; when the switching structure is in the first state, the exhaust passage is communicated with the bypass hole, and when the switching structure is in the second state, the exhaust passage is disconnected from the bypass hole.
Further, the switching structure includes: the slideway is arranged on the cylinder body and is arranged at intervals with the compression cavity; a slider assembly is movably disposed within the slideway to connect or disconnect the compression chamber with the bypass aperture.
Further, the slider assembly includes: a slide block; the elastic element is connected with the sliding block, and the sliding block is movably arranged in the slideway under the combined action of the exhaust pressure of the compression cavity and the elastic element.
Further, the sliding block at least has an avoidance position and a stop position, and when the sliding block is in the avoidance position, the bypass hole is communicated with the exhaust channel and the compression cavity; when the slider is in the stop position, the bypass orifice is disconnected from the compression chamber.
Further, the elastic element is a spring, one end of the spring is connected with the sliding block, and the other end of the spring is abutted against the bottom wall of the slideway.
Further, the slide way is a blind hole formed in the cylinder body.
Further, the cylinder block assembly also includes an exhaust silencing chamber in communication with the exhaust passage.
According to another aspect of the present invention there is provided a piston compressor comprising a cylinder block assembly as described above and a piston assembly disposed within a compression chamber of the cylinder block assembly.
Further, the piston compressor has a first operation mode and a second operation mode, and the piston compressor is switched between the first operation mode and the second operation mode by a variable capacity switching mechanism.
Further, when the piston compressor is in the first mode of operation, the discharge passage communicates with the compression chamber; when the piston compressor is in the second mode of operation, the discharge passage is disconnected from the compression chamber.
Further, the sliding block of the variable-capacity switching mechanism at least has an avoidance position and a stop position, and when the sliding block is at the avoidance position, the piston compressor is in a first working mode; when the sliding block is at the stop position, the piston compressor is in a second working mode; when the sliding block is switched from the avoiding position to the stopping position, the piston compressor is switched from the first working mode to the second working mode; when the slide block is switched from the stop position to the avoidance position, the piston compressor is switched from the second working mode to the first working mode.
According to another aspect of the present invention there is provided a refrigeration system comprising a piston compressor as described above.
By adopting the technical scheme of the invention, the variable capacity switching mechanism is arranged, so that the connection or disconnection of the exhaust channel and the compression cavity can be switched, and the air suction quantity of the compression cavity can be regulated. Specifically, when the exhaust channel is communicated with the compression cavity, gas enters the compression cavity through the exhaust channel, so that a part of ineffective air suction quantity is formed, the exhaust pressure is reduced, and the refrigerating capacity requirement under the small-load working condition can be met; when the exhaust channel is disconnected from the compression cavity, the gas sucked into the compression cavity is effective air suction quantity, the exhaust pressure is high, and the refrigerating capacity requirement under the full-load working condition can be met. Therefore, through setting up the variable capacity switching mechanism, realized the variable capacity adjustment of single cylinder piston compressor, make the compressor can adapt to the refrigerating output demand under the different operating modes, improved the energy efficiency.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
fig. 1 shows a schematic perspective view of an embodiment of a cylinder block assembly according to the present invention;
FIG. 2 shows an A-A view of the cylinder block assembly of FIG. 1;
FIG. 3 shows a B-B view of the cylinder block assembly of FIG. 1;
FIG. 4 shows a C-C view of the cylinder block assembly of FIG. 1;
FIG. 5 shows a schematic structural view of a slider assembly of the cylinder head assembly of FIG. 3;
FIG. 6 shows a simplified diagram of the cylinder head assembly of FIG. 1 under light load conditions (where the ambient temperature is 16 ℃);
FIG. 7 shows a simplified diagram of the cylinder head assembly of FIG. 1 under heavy load conditions (when the ambient temperature is 32 ℃); and
FIG. 8 shows a schematic diagram of the force versus deflection of a spring in the slider assembly of FIG. 5.
Wherein the above figures include the following reference numerals:
10. a cylinder block; 11. a compression chamber; 12. an exhaust passage; 13. a bypass hole; 14. a slideway; 20. a slider assembly; 21. a slide block; 22. an elastic element; 30. an exhaust silencing cavity; 40. a piston; 50. a crankshaft; 60. and a connecting rod.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
As shown in fig. 1 to 4, an embodiment of the present invention provides a cylinder block assembly of a piston compressor. The cylinder block assembly of this embodiment includes a cylinder block 10 and a variable-volume switching mechanism. The cylinder block 10 is provided with a compression chamber 11 and an exhaust passage 12; a variable capacity switching mechanism is provided on the cylinder block 10, which enables the discharge passage 12 to be connected to or disconnected from the compression chamber 11.
In the present application, the variable capacity switching mechanism is provided, so that the connection and disconnection between the discharge passage 12 and the compression chamber 11 can be switched, and the intake amount of the compression chamber 11 can be adjusted. Specifically, when the exhaust passage 12 is communicated with the compression chamber 11, gas enters the compression chamber 11 through the exhaust passage 12, so that a part of ineffective air suction amount is formed, the exhaust pressure is reduced, and the refrigerating capacity requirement under the small-load working condition can be met; when the exhaust channel 12 is disconnected from the compression cavity 11, the gas sucked into the compression cavity 11 is an effective suction amount, and the exhaust pressure is high, so that the refrigeration capacity requirement under the full-load working condition can be met. Therefore, through setting up the variable capacity switching mechanism, realized the variable capacity adjustment of single cylinder piston compressor, make the compressor can adapt to the refrigerating output demand under the different operating modes, improved the energy efficiency.
Specifically, the ineffective intake amount of the present embodiment means: since the density of the discharged refrigerant gas is greater than that of the sucked gas, the suction density of the whole suction process is increased, but the leakage amount of the refrigerant is greater than the increase amount of the refrigerant flow caused by the increase of the gas density in the compression process. Therefore, in the state where the discharge passage 12 of the small load condition communicates with the compression chamber 11, the actual displacement of the cylinder is smaller than the full-load displacement, and only the partial-load operation is realized.
As shown in fig. 2 to 4, in the embodiment of the present invention, the variable capacitance switching mechanism includes a bypass hole 13 and a switching structure. The bypass hole 13 is provided on the inner wall of the compression chamber 11; a switching structure connected to the bypass hole 13, the switching structure having a first state in which the bypass hole 13 communicates with the compression chamber 11 and a second state in which the bypass hole 13 is disconnected from the compression chamber 11; the exhaust passage 12 communicates with the bypass hole 13 when the switching structure is in the first state, and the exhaust passage 12 is disconnected from the bypass hole 13 when the switching structure is in the second state.
Specifically, the bypass hole 13 extends radially from the inner wall of the compression chamber 11, and the bypass hole 13 is connected to both the switching structure and the discharge passage 12, and the discharge passage 12 communicates with the compression chamber 11 through the bypass hole 13. The switching structure can change the communication state of the bypass hole 13 and the compression chamber 11, and thus change the communication state of the discharge passage 12 and the compression chamber 11. Therefore, by the above arrangement, when the discharge passage 12 communicates with the compression chamber 11, the refrigeration capacity demand under the small load condition can be satisfied; when the exhaust channel 12 is disconnected from the compression cavity 11, the refrigerating capacity requirement under the full-load working condition can be met, the variable capacity adjustment of the single-cylinder piston compressor is realized, the compressor can adapt to the refrigerating capacity requirement under different working conditions, and the compressor energy is improved.
As shown in fig. 3 and 4, in an embodiment of the present invention, the switching structure includes a slideway 14 and a slider assembly 20. The slideway 14 is arranged on the cylinder body 10, and the slideway 14 is arranged at intervals from the compression cavity 11; the slider assembly 20 is movably disposed within the slideway 14 to connect or disconnect the compression chamber 11 with the bypass hole 13.
In this application, the slider assembly 20 moves in the slide way 14 to make the slider assembly 20 can block the bypass hole 13 or open the bypass hole 13, and then change the communication state of compression chamber 11 and exhaust passage 12, realize the variable capacity adjustment of compressor, make the compressor have different refrigerating capacity under different operating modes, improve the energy efficiency.
As shown in fig. 3 to 5, in the embodiment of the present invention, the slider assembly 20 includes a slider 21 and a resilient member 22. The elastic element 22 is connected to the slide 21, and the slide 21 is movably arranged in the slide 14 under the combined action of the discharge pressure of the compression chamber 11 and the elastic element 22.
Specifically, as shown in fig. 7, under the high load working condition, the exhaust pressure of the compressor compresses the elastic element 22 to deform the elastic element, the sliding block 21 seals the bypass hole 13 under the driving of the elastic element 22, the exhaust channel 12 is disconnected from the compression cavity 11, so that the compression cavity 11 forms a closed space, and the gas sucked into the compression cavity 11 is all the effective air suction amount, thereby realizing full-displacement adjustment of the full load of the compressor, meeting the refrigeration requirement under the high load working condition, and improving the efficiency of the compressor. As shown in fig. 6, under the small load condition, the exhaust pressure of the compressor is insufficient to deform the elastic element 22, or the deformation amount of the elastic element 22 is insufficient to drive the sliding block to block the bypass hole 13, the bypass hole 13 is communicated with the exhaust channel 12 and the compression cavity 11, so that part of gas in the exhaust channel 12 flows into the compression cavity 11, and a part of ineffective air suction amount D is formed in the compression cavity 11, so that the air suction amount of the compression cavity 11 is reduced while the refrigerating capacity requirement under the small load condition is met, and the compressor energy efficiency is reduced.
Therefore, through the arrangement, the capacity-variable adjustment of the compressor is realized according to the exhaust pressure of the compressor, the energy consumption is reduced, the structure is simple, the capacity-variable adjustment can be realized only by improving the local structure of the compressor, and the cost is lower.
Preferably, the sliding block 21 has at least a dodging position and a stopping position, and when the sliding block 21 is in the dodging position, the bypass hole 13 is communicated with the exhaust passage 12 and the compression cavity 11; when the slider 21 is in the stop position, the bypass hole 13 is disconnected from the compression chamber 11.
The stop position and the bypass position of the slide 21 are switched by different discharge pressures of the compressor. When the exhaust pressure of the compressor is high, the exhaust pressure enables the elastic element 22 to elastically deform, the sliding block 21 is driven by the elastic element to block the bypass hole 13, at the moment, the sliding block 21 is positioned at a stop position, the bypass hole 13 is disconnected from the compression cavity 11, and then the compression cavity 11 is disconnected from the exhaust channel 12; when the exhaust pressure of the compressor is smaller, the exhaust pressure is insufficient to deform the elastic element 22, or the deformation amount of the elastic element 22 is insufficient to drive the sliding block to block the bypass hole 13, at this time, the sliding block 21 is located at the avoidance position, the bypass hole 13 is communicated with the compression chamber 11, so that the compression chamber 11 is communicated with the exhaust channel 12, and at this time, the sliding block 21 is located at the avoidance position.
Preferably, the elastic element 22 is a spring, one end of which is connected to the slider 21, and the other end of which abuts against the bottom wall of the slideway 14.
Specifically, a spring of suitable length and stiffness may be selected based on the operating conditions of the compressor. In this embodiment, the elastic member 22 is a cylindrical helical compression spring, and the material is SWP-B (steel wire, high carbon steel), and the shear modulus G of the material can be queried, and the spring rate P' can be calculated according to the formula.
As shown in FIG. 8, the initial length of the spring in the free state is set to be Ho, and the length at the minimum working load is set to be H 1 Length at maximum working load H n . System discharge pressure P when the compressor is operating in low ambient temperature light load conditions 1 The bearing area of the slider 21 is S, and the deformation of the spring can be calculated according to the formula: f (F) 1 ＝P 1 * S/P', spring length H of minimum working load 1 ＝Ho-F 1 . According to the requirement of the embodiment, when the compressor is expected to operate under the low-load working condition of low ambient temperature, the spring does not generate deformation amount, therefore, F 1 The smaller the better.
When the compressor operates under the high-load working condition with high ambient temperature, the exhaust pressure of the system is Pn, the bearing area of the sliding block 21 is S, and the deformation of the spring can be calculated according to the formula: fn=pn S/P', length at maximum working load hn=h 0 Fn. According to the embodiment of the application, when the compressor is expected to operate under a high-load working condition with high ambient temperature, the spring has a large deformation amount, so that the sliding block 21 is driven by the spring to block the bypass hole 13, and full-load full-displacement adjustment of the compressor is realized.
Further, the slide 14 is a blind hole formed in the cylinder block 10.
In this application, the chute 14 is located between the compression chamber 11 and the discharge passage 12, and the bypass hole 13 communicates with the compression chamber 11, the chute 14, and the discharge passage 12 in this order.
Preferably, in the embodiment of the present invention, the inner diameter of the bypass hole 13 is designed according to the displacement size of the compressor; the position of the bypass hole 13 from the dead point of the piston 40 of the piston compressor needs to be determined according to the calculation result of the simulated running state of the compressor, so that the setting position of the bypass hole 13 does not influence the normal compression process of the compressor; the length of the bypass hole 13 in the radial direction of the compression chamber 11 on the cylinder block 10 is designed according to the refrigerating demand of the compressor and the displacement of the compressor.
As shown in fig. 2 and 4, in an embodiment of the present invention, the cylinder group assembly further includes an exhaust muffling chamber 30 in communication with the exhaust passage 12.
When the compressor is discharging, the gas enters the exhaust silencing cavity 30 through the exhaust channel 12, so that the exhaust noise is reduced, and the use experience of a user is improved.
Embodiments of the present invention provide a piston compressor comprising a cylinder block assembly as described above and a piston assembly disposed within a compression chamber of the cylinder block assembly.
The cylinder seat assembly can realize capacity adjustment of the compressor so as to meet the refrigeration requirements of the compressor under different working conditions, improves the energy efficiency of the compressor, and has simple structure and lower cost. Thus, a piston compressor having the above-described cylinder block assembly also has the above-described advantages.
Further, the piston compressor further includes a piston 40, a crankshaft 50, and a connecting rod 60. The piston 40 is driven by the crankshaft 50 and the connecting rod 60 to reciprocate in the compression chamber 11, thereby completing the suction-compression-discharge processes of the compressor.
Preferably, in an embodiment of the present invention, the piston compressor has a first operation mode and a second operation mode, and the piston compressor is switched between the first operation mode and the second operation mode by a variable capacity switching mechanism.
Specifically, the first working mode and the second working mode of the piston compressor correspond to different working conditions respectively. The piston compressor runs in different working modes under different working conditions, and can meet the requirements of refrigerating capacity under different working conditions. Therefore, the working mode of the piston compressor is switched by the variable capacity switching mechanism, and the energy efficiency of the piston compressor is improved.
Further, when the piston compressor is in the first operation mode, the discharge passage 12 communicates with the compression chamber 11; when the piston compressor is in the second operating mode, the discharge passage 12 is disconnected from the compression chamber 11.
In this application, when the exhaust passage 12 communicates with the compression chamber 11, part of the gas in the exhaust passage 12 flows into the compression chamber 11, and a part of ineffective air intake is formed in the compression chamber 11, so that the exhaust pressure is small, the refrigerating capacity requirement under the small-load working condition is satisfied, the air intake of the compression chamber 11 is reduced, and the compressor energy is reduced. Thus, the first operating mode of the piston compressor is an operating mode under light load conditions, which is suitable for opening under light load conditions of low ambient temperature. When the exhaust channel 12 is disconnected from the compression cavity 11, the gas sucked into the compression cavity 11 is an effective suction amount, and the exhaust pressure is high, so that the refrigeration capacity requirement under the full-load working condition can be met. Thus, the second operating mode of the piston compressor is an operating mode under heavy load conditions, which is suitable for opening under heavy load conditions of high ambient temperature.
Preferably, the sliding block 21 of the variable capacity switching mechanism at least has an avoidance position and a stop position, and when the sliding block 21 is at the avoidance position, the piston compressor is in the first working mode; when the slide 21 is in the stop position, the piston compressor is in the second operating mode; when the slide block 21 is switched from the avoidance position to the stop position, the piston compressor is switched from the first working mode to the second working mode; when the slide 21 is switched from the stop position to the evacuation position, the piston compressor is switched from the second operating mode to the first operating mode.
Specifically, taking a piston compressor in a refrigerator as an example, the first operation mode and the second operation mode are switched by:
the refrigerator is internally provided with a temperature sensor which can sense the ambient temperature of the refrigerator and the temperature in the refrigerator. The temperature sensor is connected with a controller in the refrigerator for controlling the piston compressor.
When the temperature sensor detects that the refrigerator is in a high ambient temperature (such as above 30 ℃), the temperature sensor transmits a temperature signal to the controller, the controller controls the compressor to work under a high exhaust pressure at the high ambient temperature, the exhaust pressure of the compressor can compress the elastic element 22 to deform at the moment, the sliding block 21 blocks the bypass hole 13 under the driving of the elastic element 22, the sliding block 21 is in a stop position, the exhaust channel 12 is disconnected from the compression cavity 11, so that the compression cavity 11 forms a closed space, and therefore, the air sucked by the compression cavity 11 is all effective air suction amount, full-displacement adjustment of the full load of the compressor is realized, the refrigerating capacity requirement under a large-load working condition is met, and the efficiency of the compressor is improved.
When the temperature sensor detects that the refrigerator is in a low environment temperature (such as below 15 ℃), the temperature sensor transmits a temperature signal to the controller, and under the low environment temperature, the controller controls the compressor to work under a low exhaust pressure, at the moment, the exhaust pressure of the compressor is insufficient to deform the elastic element 22, or the deformation amount of the elastic element 22 is insufficient to drive the sliding block to seal the bypass hole 13, the sliding block 21 is in the avoidance position, the bypass hole 13 is communicated with the exhaust channel 12 and the compression cavity 11, so that part of gas in the exhaust channel 12 flows into the compression cavity 11, a part of ineffective air suction amount D is formed in the compression cavity 11, and the air suction amount of the compression cavity 11 is reduced while the refrigerating amount requirement under a small load working condition is met, and the energy of the compressor is reduced.
The embodiment of the invention also provides a refrigerating system which comprises the piston compressor.
The piston compressor realizes single-cylinder variable capacity operation, reduces the energy efficiency of the compressor, and has simple structure and lower cost. Therefore, the refrigeration system having the above-described piston compressor also has the above-described advantages.
From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: the variable capacity switching mechanism is arranged, so that the connection or disconnection of the exhaust channel and the compression cavity can be switched, and the air suction amount of the compression cavity can be adjusted. Specifically, when the exhaust channel is communicated with the compression cavity, gas enters the compression cavity through the exhaust channel, so that a part of ineffective air suction quantity is formed, the exhaust pressure is reduced, and the refrigerating capacity requirement under the small-load working condition can be met; when the exhaust channel is disconnected from the compression cavity, the gas sucked into the compression cavity is effective air suction quantity, the exhaust pressure is high, and the refrigerating capacity requirement under the full-load working condition can be met. Therefore, through setting up the variable capacity switching mechanism, realized the variable capacity adjustment of single cylinder piston compressor, make the compressor can adapt to the refrigerating output demand under the different operating modes, improved the energy efficiency.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A cylinder block assembly of a piston compressor, comprising:
a cylinder block (10), wherein a compression chamber (11) and an exhaust passage (12) are arranged on the cylinder block (10);
a variable capacity switching mechanism provided on the cylinder block (10) and capable of connecting or disconnecting the exhaust passage (12) to or from the compression chamber (11);
the variable-volume switching mechanism comprises a bypass hole (13) and a switching structure, wherein the bypass hole (13) is arranged on the inner wall of the compression cavity (11); a switching structure is connected to the bypass hole (13), the switching structure having a first state in which the bypass hole (13) communicates with the compression chamber (11) and a second state in which the bypass hole (13) is disconnected from the compression chamber (11); -said exhaust channel (12) is in communication with said bypass hole (13) when said switching structure is in said first state, said exhaust channel (12) being disconnected from said bypass hole (13) when said switching structure is in said second state;
the switching structure comprises a slideway (14) and a sliding block assembly (20), wherein the slideway (14) is arranged on the cylinder block (10), the slideway (14) is arranged at intervals with the compression cavity (11), and the sliding block assembly (20) is movably arranged in the slideway (14) so as to enable the compression cavity (11) to be communicated with or disconnected from the bypass hole (13);
the sliding block assembly (20) comprises a sliding block (21) and an elastic element (22), wherein the elastic element (22) is connected with the sliding block (21), and the sliding block (21) is movably arranged in the slideway (14) under the combined action of the exhaust pressure of the compression cavity (11) and the elastic element (22).
2. The cylinder block assembly according to claim 1, characterized in that the slide (21) has at least a retracted position and a stop position, the bypass opening (13) being in communication with both the exhaust channel (12) and the compression chamber (11) when the slide (21) is in the retracted position; when the slider (21) is in the stop position, the bypass opening (13) is disconnected from the compression chamber (11).
3. A cylinder block assembly according to claim 1, characterized in that the elastic element (22) is a spring, one end of which is connected to the slider (21), the other end of which abuts against the bottom wall of the slide (14).
4. A cylinder block assembly according to any one of claims 1 to 3, characterized in that the slide (14) is a blind hole open on the cylinder block (10).
5. A cylinder block assembly according to any one of claims 1 to 3, characterized in that the cylinder block assembly further comprises an exhaust silencing chamber (30) communicating with the exhaust passage (12).
6. A piston compressor comprising a cylinder block assembly according to any one of claims 1 to 5 and a piston assembly disposed within a compression chamber of the cylinder block assembly.
7. The piston compressor of claim 6, wherein the piston compressor has a first mode of operation and a second mode of operation, the piston compressor being switched between the first mode of operation and the second mode of operation by the variable-volume switching mechanism.
8. The piston compressor according to claim 7, characterized in that the discharge channel (12) communicates with the compression chamber (11) when the piston compressor is in the first operating mode; when the piston compressor is in the second operating mode, the discharge channel (12) is disconnected from the compression chamber (11).
9. The piston compressor according to claim 8, characterized in that the slide (21) of the variable-volume switching mechanism has at least a dodge position and a stop position, the piston compressor being in the first operating mode when the slide (21) is in the dodge position; -when the slide (21) is in the stop position, the piston compressor is in the second operating mode; when the slide block (21) is switched from the avoidance position to the stop position, the piston compressor is switched from the first working mode to the second working mode; when the slide block (21) is switched from the stop position to the avoidance position, the piston compressor is switched from the second working mode to the first working mode.
10. A refrigeration system comprising a piston compressor as claimed in any one of claims 6 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811068778.0A CN108980014B (en) | 2018-09-13 | 2018-09-13 | Cylinder block assembly of piston compressor, piston compressor and refrigerating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811068778.0A CN108980014B (en) | 2018-09-13 | 2018-09-13 | Cylinder block assembly of piston compressor, piston compressor and refrigerating system |
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| Publication Number | Publication Date |
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| CN108980014A CN108980014A (en) | 2018-12-11 |
| CN108980014B true CN108980014B (en) | 2024-01-30 |
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| CN201811068778.0A Active CN108980014B (en) | 2018-09-13 | 2018-09-13 | Cylinder block assembly of piston compressor, piston compressor and refrigerating system |
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|---|---|---|---|---|
| CN109958625B (en) * | 2018-12-20 | 2020-01-07 | 珠海格力电器股份有限公司 | Deformation control method and system for elastic part of pin and variable-capacity compressor |
| CN110425115B (en) * | 2019-08-14 | 2021-05-07 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor and refrigeration equipment with same |
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| CN112594180A (en) * | 2020-12-01 | 2021-04-02 | 加西贝拉压缩机有限公司 | Effective cylinder volume adjusting structure of compressor |
| CN112780541A (en) * | 2020-12-23 | 2021-05-11 | 加西贝拉压缩机有限公司 | Effective cylinder volume self-adaptive adjusting structure for refrigeration compressor |
| CN113027731B (en) * | 2021-03-24 | 2022-12-13 | 加西贝拉压缩机有限公司 | Micromotor adjusting device for air displacement of compressor |
| CN113027742A (en) * | 2021-03-31 | 2021-06-25 | 加西贝拉压缩机有限公司 | Electromagnetic variable volume device for adjusting effective cylinder volume of compressor |
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|---|---|
| CN108980014A (en) | 2018-12-11 |
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