阅读说明：本技术 一种用于制冷压缩机的有效气缸容积自适应调节结构 (Effective cylinder volume self-adaptive adjusting structure for refrigeration compressor ) 是由 张勤建 武守飞 曾卫东 王宗槐 魏建锋 于 2020-12-23 设计创作，主要内容包括：本发明公开了一种用于制冷压缩机的有效气缸容积自适应调节结构,包括曲轴箱、气缸盖、阀组和活塞,曲轴箱上设有气缸孔、通气孔和阀座孔,通气孔的一端与气缸孔连通,通气孔的另一端通过阀座孔连通到压缩机壳内,阀座孔内设有阀芯和弹性元件,阀芯与阀座孔滑动密封连接,阀芯包括通流段和密封段；弹性元件的一端与阀芯连接,弹性元件的另一端并与气缸盖连接；阀组上设有引流孔,引流孔的一端与排气腔连通,引流孔的另一端与阀座孔连通。本发明提供了一种用于制冷压缩机的有效气缸容积自适应调节结构,实现了压缩机的有效气缸容积和输出制冷量随着系统负载的变化而做自适应调节,有利于制冷系统的节能。(The invention discloses an effective cylinder volume self-adaptive adjusting structure for a refrigeration compressor, which comprises a crankcase, a cylinder cover, a valve group and a piston, wherein the crankcase is provided with a cylinder hole, a vent hole and a valve seat hole; one end of the elastic element is connected with the valve core, and the other end of the elastic element is connected with the cylinder cover; be equipped with the drainage hole on the valves, the one end and the exhaust chamber intercommunication in drainage hole, the other end and the disk seat hole intercommunication in drainage hole. The invention provides an effective cylinder volume self-adaptive adjusting structure for a refrigeration compressor, which realizes the self-adaptive adjustment of the effective cylinder volume and the output refrigerating capacity of the compressor along with the change of system load and is beneficial to the energy conservation of the refrigeration system.)

1. An effective cylinder volume self-adaptive adjusting structure for a refrigeration compressor comprises a crankcase, a cylinder cover, a valve group and a piston, wherein the valve group and the cylinder cover enclose a compressor exhaust cavity; one end of the vent hole is communicated with the cylinder hole, the other end of the vent hole is communicated into the compressor shell through the valve seat hole, a valve core and an elastic element are arranged in the valve seat hole, the valve core is connected with the valve seat hole in a sliding and sealing mode, and the valve core comprises a through-flow section and a sealing section; one end of the elastic element is connected with the valve core, and the other end of the elastic element is connected with the cylinder cover; be equipped with the drainage hole on the valves, the one end and the exhaust chamber intercommunication in drainage hole, the other end and the disk seat hole intercommunication in drainage hole.

2. The adaptive effective cylinder volume regulating structure of claim 1, wherein the valve core further comprises a guide section, the flow passage section and the sealing section are sequentially connected, and the elastic element is sleeved on the guide section.

3. The adaptive-displacement regulating structure for the effective cylinder volume of a refrigerating compressor as claimed in claim 2, wherein the through-flow section is provided with a through-flow hole.

4. The adaptive effective cylinder volume adjustment structure for a refrigeration compressor as claimed in claim 2, wherein said through-flow segment is provided with a through-flow ring groove.

5. The adaptive regulation structure of effective cylinder volume for refrigeration compressor as claimed in claim 2, 3 or 4, wherein the sealing section is provided with a sealing ring groove, and a sealing ring is arranged in the sealing ring groove.

6. The adaptive adjusting structure for the effective cylinder volume of the refrigeration compressor as recited in claim 1, 2, 3 or 4, wherein the communication between the vent hole and the cylinder hole is near the middle position of the cylinder hole.

7. The adaptive effective cylinder volume adjusting structure of claim 3, wherein the guide section is provided with a guide block, and the inner side wall of the valve seat hole is provided with a guide groove adapted to the guide block.

8. The adaptive adjusting structure for the effective cylinder volume of the refrigeration compressor as claimed in claim 1, 2, 3 or 4, wherein the elastic element can be a telescopic spring, and the telescopic spring is sleeved on the valve core.

Technical Field

The invention relates to the technical field of refrigeration compressors, in particular to an effective cylinder volume self-adaptive adjusting structure for a 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 matching characteristics of the refrigerator and the compressor, under different environment temperature working conditions, the refrigerating capacity requirements of the refrigerator are different and greatly different; for example, in an energy consumption test experiment of a refrigerator, the refrigerating capacity required by a refrigerator body under a 32-degree high-ring-temperature working condition is about 2 times that required by a refrigerator body under a 16-degree low-ring-temperature working condition, so that a refrigerator compressor is expected to output different refrigerating capacities under different ring-temperature working conditions to meet the requirements of the refrigerator, and therefore the energy-saving requirement is met. On the other hand, the compartment of the refrigerator needs to accurately control the temperature and improve the moisture preservation and the freshness preservation of food, and the cold quantity matching of the refrigerator and a compressor needs to be more accurate and cannot have large fluctuation. Therefore, the compressor for outputting the variable-cold quantity is an important guarantee for energy conservation and food material preservation of the refrigerator and the freezer in the future.

At present, in the industry of refrigerator compressors, a reciprocating variable frequency compressor for controlling the rotating speed of the compressor is a mainstream product of variable cooling capacity. Compared with the original fixed-frequency compressor, the variable-frequency compressor can control the rotating speed of the compressor of the refrigerator to output different cold quantities according to different climatic environment temperatures of the refrigerator; the heat load of the refrigerator and the cold output of the compressor are in a better matching state. However, the inverter compressor needs an additional inverter control panel to control the operation of the compressor, so that the cost of the compressor is increased greatly; and the frequency conversion board has many electronic components, so that the overall reliability of the compressor is reduced. Therefore, the effective cylinder volume self-adaptive adjusting structure for the refrigeration compressor is designed, so that the output refrigerating capacity of the compressor is larger under the conditions of high ambient temperature and high load of the refrigeration system; the refrigerating system has smaller compression output refrigerating capacity under the condition of low ring temperature and low load; therefore, the output refrigerating capacity of the compressor is self-adaptively adjusted along with the change of the system load, and the energy conservation of a refrigerating system is facilitated.

Chinese patent application publication No. CN107084125B, published as 2020, 01, 03, entitled "cylinder volume adjusting method of linear compressor", discloses a cylinder volume adjusting method of a linear compressor, the linear compressor includes a housing, and a stator, a piston, a cylinder, a mover, a spring, and a back plate arranged in the housing, the housing is provided with a suction tube, the suction tube is provided with a first valve for opening and closing the suction tube, a vacuum chamber assembly is further arranged between the mover and the back plate, the vacuum chamber assembly includes a vacuum cylinder body and a movable plug, and the vacuum chamber assembly further includes a second valve for opening and closing the vacuum cylinder body; the specific method comprises the following steps: if X < X0, the refrigerant in the shell is completely discharged out of the shell by the suction and exhaust effect of the linear compressor by opening the first valve and the second valve, if X > X0, and then the second valve is closed and the first valve is opened. However, in the adjusting method in the patent, a complicated electric control structure needs to be additionally arranged, the structure is complicated, and the reliability of the compressor is reduced.

Disclosure of Invention

In order to overcome the defects that in the prior art, the reciprocating type frequency conversion compression is high in cost, a plurality of electronic components are arranged on a frequency conversion plate, and the overall reliability of the compressor is reduced, the invention provides an effective cylinder volume self-adaptive adjusting structure for a refrigeration compressor, so that the output refrigerating capacity of the compressor is larger under the conditions of high ring temperature and high load of the refrigeration system; the refrigerating system has smaller compression output refrigerating capacity under the condition of low ring temperature and low load; therefore, the output refrigerating capacity of the compressor is self-adaptively adjusted along with the change of the system load, and the energy conservation of a refrigerating system is facilitated.

In order to achieve the purpose, the invention adopts the following technical scheme:

an effective cylinder volume self-adaptive adjusting structure for a refrigeration compressor comprises a crankcase, a cylinder cover, a valve group and a piston, wherein the valve group and the cylinder cover enclose a compressor exhaust cavity; one end of the vent hole is communicated with the cylinder hole, the other end of the vent hole is communicated into the compressor shell through the valve seat hole, a valve core and an elastic element are arranged in the valve seat hole, the valve core is connected with the valve seat hole in a sliding and sealing mode, and the valve core comprises a through-flow section and a sealing section; one end of the elastic element is connected with the valve core, and the other end of the elastic element is connected with the cylinder cover; be equipped with the drainage hole on the valves, the one end and the exhaust chamber intercommunication in drainage hole, the other end and the disk seat hole intercommunication in drainage hole.

In the above technical scheme, the elastic element may be an extension spring, and the extension spring may be sleeved on the valve core, so that space is saved, and the elastic element may also be directly contacted with the end of the valve core. By adopting the technical scheme structure, the output refrigerating capacity of the compressor is larger under the condition of high ring temperature and high load of the refrigerating system; the refrigerating system has smaller compression output refrigerating capacity under the condition of low ring temperature and low load; therefore, the output refrigerating capacity of the compressor is self-adaptively adjusted along with the change of the system load, and the energy conservation of a refrigerating system is facilitated; and the scheme has the advantages of simple structure, high reliability and low cost. The working principle of the technical scheme is as follows: under the working condition of high ring temperature, the air suction and exhaust pressure difference of the compressor overcomes the elasticity of the elastic element and pushes the valve core to move towards the direction far away from the drainage hole, the sealing section of the valve core blocks the vent hole on the crankcase, other parts in the cylinder hole cannot leak through the vent hole, the effective cylinder volume is maximum at the moment, and the compressor outputs high refrigerating capacity; under the working condition of low ring temperature, the exhaust pressure of the compressor cannot push the valve core to move towards the direction far away from the drainage hole, the through-flow section of the valve core is communicated with the vent hole on the crankcase, all refrigerant which is designed to leak in the cylinder can leak into the compressor shell, the effective cylinder volume is minimum at the moment, and the compressor outputs low refrigerating capacity; under the higher operating mode of ambient temperature, the discharge pressure of compressor can promote the case to the direction removal part displacement of keeping away from the drainage hole, only lets the through-flow section of case and the air vent part on the crankcase communicate, and the through-flow area will be less than the through-flow area under the low temperature operating mode, can let the refrigerant part that designs to leak in the cylinder leak to the compressor casing in, effective cylinder volume is at the median this moment, and the compressor output corresponding refrigerating output.

Preferably, the valve core further comprises a guide section, the through-flow section and the sealing section are sequentially connected, and the elastic element is sleeved on the guide section. The structure can ensure the stability of the valve core sliding structure.

Preferably, the through-flow section is provided with a through-flow hole. The structure can make the through-flow holes communicated when the through-flow section is at the position of the through-flow holes.

Preferably, the through-flow section is provided with a through-flow ring groove. The structure can make the through-flow holes communicated when the through-flow section is at the position of the through-flow holes.

Preferably, a sealing ring groove is arranged on the sealing section, and a sealing ring is arranged in the sealing ring groove. The structure can prevent leakage of the high pressure side refrigerant.

Preferably, the communication between the vent hole and the cylinder bore is located near the middle of the cylinder bore.

Preferably, the guide section is provided with a guide block, and the inner side wall of the valve seat hole is provided with a guide groove matched with the guide block. The structure can prevent the valve core from sliding to rotate, so that the through flow hole is aligned with the through flow hole.

Preferably, the elastic element may be a telescopic spring, and the telescopic spring is sleeved on the valve core.

The invention has the beneficial effects that: the output refrigerating capacity of the compressor is larger under the condition of high ring temperature and high load of the refrigerating system; the refrigerating system has smaller compression output refrigerating capacity under the condition of low ring temperature and low load; therefore, the output refrigerating capacity of the compressor is self-adaptively adjusted along with the change of the system load, and the energy conservation of a refrigerating system is facilitated; and the scheme has the advantages of simple structure, high reliability and low cost.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of example 2;

FIG. 3 is a schematic structural view of example 4.

In the figure: the valve comprises a crankcase 1, a cylinder hole 1.1, a vent hole 1.2, a valve seat hole 1.3, a cylinder cover 2, an exhaust cavity 2.1, a valve group 3, a drainage hole 3.1, a piston 4, an elastic element 5, a valve core 6, a guide section 6.1, a through flow section 6.2, a sealing section 6.3, a through flow hole 6.4, a through flow ring groove 6.5, a sealing ring groove 6.6 and a sealing ring 7.

Detailed Description

The invention is further described with reference to the following figures and specific embodiments.

Example 1:

as shown in fig. 1, an effective cylinder volume adaptive adjustment structure for a refrigeration compressor comprises a crankcase 1, a cylinder cover 2, a valve group 3 and a piston 4, wherein a compressor exhaust cavity 2.1 is enclosed by the valve group 3 and the cylinder cover 2, the crankcase 1 is provided with a cylinder hole 1.1, a vent hole 1.2 and a valve seat hole 1.3, and the piston 4 is arranged in the cylinder hole 1.1 and is matched with the cylinder hole 1.1; one end of the vent hole 1.2 is communicated with the cylinder hole 1.1, the other end of the vent hole 1.2 is communicated into the compressor shell through a valve seat hole 1.3, a valve core 6 and an elastic element 5 are arranged in the valve seat hole 1.3, the valve core 6 is connected with the valve seat hole 1.3 in a sliding and sealing mode, and the valve core 6 comprises a guide section 6.1, a through-flow section 6.2 and a sealing section 6.3; the guide section 6.1, the through-flow section 6.2 and the sealing section 6.3 are sequentially connected, the elastic element 5 is sleeved on the guide section 6.1, one end of the elastic element 5 is connected with the valve core 6, and the other end of the elastic element 5 is connected with the cylinder cover 2; the sealing section 6.3 is provided with a sealing ring groove 6.6, and a sealing ring 7 is arranged in the sealing ring groove 6.6. Be equipped with drainage hole 3.1 on the valves 3, the one end and the exhaust chamber 2.1 intercommunication of drainage hole 3.1, the other end and the valve seat hole 1.3 intercommunication of drainage hole 3.1. The communication position of the vent hole 1.2 and the cylinder hole 1.1 is close to the middle position of the cylinder hole 1.1.

In the above technical scheme, the elastic element 5 may be an extension spring, and the extension spring may be sleeved on the valve core 6, so as to save space, and may also be directly contacted with the end of the valve core 6. By adopting the technical scheme structure, the output refrigerating capacity of the compressor is larger under the condition of high ring temperature and high load of the refrigerating system; the refrigerating system has smaller compression output refrigerating capacity under the condition of low ring temperature and low load; therefore, the output refrigerating capacity of the compressor is self-adaptively adjusted along with the change of the system load, and the energy conservation of a refrigerating system is facilitated; and the scheme has the advantages of simple structure, high reliability and low cost. The working principle of the technical scheme is as follows: under the working condition of high ring temperature, the pressure difference of air suction and exhaust of the compressor overcomes the elasticity of the elastic element 5 and pushes the valve core 6 to move towards the direction far away from the drainage hole 3.1, so that the sealing section 6.3 of the valve core 6 blocks the vent hole 1.2 on the crankcase 1, other air in the cylinder hole 1.1 cannot leak through the vent hole 1.2, the effective cylinder volume is maximum at the moment, and the compressor outputs high refrigerating capacity; under the working condition of low ring temperature, the exhaust pressure of the compressor cannot push the valve core 6 to move towards the direction far away from the drainage hole 3.1, the through-flow section 6.2 of the valve core 6 is communicated with the vent hole 1.2 on the crankcase 1, all the refrigerant which is designed to leak in the cylinder can leak into the compressor shell, the effective cylinder volume is minimum at the moment, and the compressor outputs low refrigerating capacity; under the working condition of higher ambient temperature, the exhaust pressure of the compressor can push the valve core 6 to move partially to the direction far away from the drainage hole 3.1, only the through-flow section 6.2 of the valve core 6 is communicated with the vent hole 1.2 on the crankcase 1, the through-flow area is smaller than that under the low-temperature working condition, the part of refrigerant which is designed to leak in the cylinder can leak into the compressor shell, the effective cylinder volume is at an intermediate value at the moment, and the compressor outputs corresponding refrigerating capacity.

Example 2:

as shown in the figure, on the basis of embodiment 1, the flow passage section 6.2 is provided with a flow passage 6.4. The structure can ensure that the through flow holes 6.4 are communicated when the through flow section 6.2 is at the position of the vent hole 1.2.

Example 3:

as shown in the figure, on the basis of embodiment 2, a guide block is arranged on the guide section 6.1, and a guide groove adapted to the guide block is arranged on the inner side wall of the valve seat hole 1.3. This arrangement prevents the spool 6 from sliding and rotating so that the through-flow opening 6.4 is aligned with the through-flow opening 6.4.

Example 4:

as shown in the figure, on the basis of embodiment 1, the through-flow segment 6.2 is provided with a through-flow ring groove 6.5. The structure can ensure that the through flow holes 6.4 are communicated when the through flow section 6.2 is at the position of the vent hole 1.2.

The invention has the beneficial effects that: the output refrigerating capacity of the compressor is larger under the condition of high ring temperature and high load of the refrigerating system; the refrigerating system has smaller compression output refrigerating capacity under the condition of low ring temperature and low load; therefore, the output refrigerating capacity of the compressor is self-adaptively adjusted along with the change of the system load, and the energy conservation of a refrigerating system is facilitated; and the scheme has the advantages of simple structure, high reliability and low cost.