Air suction structure of double-cylinder pump body, double-cylinder pump body structure with air suction structure and compressor

Abstract

The utility model relates to an air suction structure of a double-cylinder pump body, a double-cylinder pump body structure with the air suction structure and a compressor. The air suction structure of the double-cylinder pump body comprises an upper air cylinder, a middle partition plate and a lower air cylinder, and a lower air suction channel communicated with a lower compression cavity is formed in the outer side wall of the lower air cylinder; a lower through hole communicated with the lower air suction channel is formed in the end face of the lower air cylinder, a middle through hole communicated with the lower through hole and identical to the lower through hole in size is formed in the middle partition plate, and the upper air cylinder is provided with an upper air suction channel communicated with the middle through hole and the upper compression cavity. A lower inserting groove is formed in the end face of the lower air cylinder and located between the outer side of the lower air cylinder and the lower through hole. An upper slot is formed in the end face of the upper air cylinder and located between the outer side of the upper air cylinder and the upper air suction channel. The upper end face of the middle partition plate is provided with an upper boss embedded in the upper inserting groove, and the middle partition plate is provided with a lower boss embedded in the lower inserting groove. The sealing performance of the outer side of the gas channel in the gas suction structure can be effectively improved through structural matching of the middle partition plate, the upper cylinder and the lower cylinder.

Description

TECHNICAL FIELD

[0001] The utility model relates to compressor technical field, in particular to a kind of suction structure of double-cylinder pump body and double-cylinder pump body structure and compressor with it. BACKGROUND

[0002] Rotary compressor can be divided into single-cylinder compressor and double-cylinder compressor from cylinder structure. Among them, double-cylinder compressor compared with single-cylinder compressor, due to its two symmetrical eccentric wheels, so that the operation of double-cylinder compressor is more stable, noise is lower.The working principle of double-cylinder compressor is, liquid reservoir divides two gas outlet pipes and is respectively communicated with two cylinders, gas is divided into two parts from two gas outlet pipes and respectively enters two cylinders, then reaches the effect of refrigeration or heating after compression.

[0003] However, the pump body structure of existing double-cylinder compressor, adopt two gas outlet pipes not only increase, and its sealing requirement also doubles.In addition, some small size double-cylinder compressor, the edge of the suction passage arranged in its interior due to the restriction of small size and lead to sealing distance is smaller and smaller, and the outside of suction passage only rely on the tension of refrigeration oil to form sealing oil film, under the operation of high load, a small amount of refrigeration oil is easily sucked into cylinder, leading to the effective volume of cylinder deterioration. SUMMARY

[0004] Based on this, the purpose of the utility model is to overcome the deficiency of prior art, provide a kind of suction structure of double-cylinder pump body and double-cylinder pump body structure and compressor with it.According to the suction structure of double-cylinder pump body and double-cylinder pump body structure and compressor with it of the utility model embodiment, by the structure cooperation of middle partition plate and upper cylinder, lower cylinder, the sealing property of the outside of gas passage in suction structure can be effectively improved.

[0005] To achieve the above object, the utility model discloses a first aspect provides a kind of suction structure of double cylinder pump body, including upper cylinder, middle partition, lower cylinder, the upper cylinder with the lower cylinder is respectively arranged in the upper, lower end surface of the middle partition;The middle part of the upper cylinder is opened and passed and is equipped with upper compression cavity, the middle part of the lower cylinder is opened and passed and is equipped with lower compression cavity, the outer wall of the lower cylinder is equipped with lower suction passage that is connected with the lower compression cavity;The end surface of the lower cylinder is connected with the middle partition is equipped with lower through hole that is connected with the lower suction passage, the middle partition is opened and passed and is equipped with with the lower through hole being connected and the size being same middle through hole in its two ends, the upper cylinder is equipped with upper suction passage that is connected with the middle through hole and the upper compression cavity;The end surface of the lower cylinder is connected with the middle partition is equipped with lower slot, and the lower slot is located between the outer side of the lower cylinder and the lower through hole;The end surface of the upper cylinder is connected with the middle partition is equipped with upper slot, and the upper slot is located between the outer side of the upper cylinder and the upper suction passage;The upper end surface of the middle partition is provided with upper boss, and the upper boss is embedded in the upper slot, and the lower end surface of the middle partition is provided with lower boss, and the lower boss is embedded in the lower slot.

[0006] Therefore, according to the suction structure of the double cylinder pump body of the utility model embodiment, the lower suction passage connected with the lower compression cavity is arranged on the outer side of the lower cylinder, the lower through hole connected with the lower suction passage is arranged on the lower cylinder, the middle through hole connected with the lower through hole is arranged on the middle partition, and the upper suction passage connected with the middle through hole is arranged on the upper cylinder, so that the suction structure is a single-port suction structure, a part of the gas sucked from the suction port of the lower suction passage enters the lower compression cavity through the lower suction passage, and the other part of the gas enters the upper compression cavity along the gas passage composed of the lower through hole, the middle through hole and the upper suction passage, so that the number of suction pipes and the sealing cost of the suction port can be reduced. In addition, in the case of a small-size machine, gaps exist between the connection between the lower cylinder and the middle partition and the connection between the middle partition and the upper cylinder in the gas passage composed of the lower through hole, the middle through hole and the upper suction passage. The upper boss and the lower boss arranged on the upper end surface and the lower end surface of the middle partition are embedded in the upper slot of the upper cylinder and the lower slot of the lower cylinder, respectively, so as to seal the outer circumferential side of the connection between the lower through hole and the middle through hole and the outer side of the connection between the middle through hole and the upper suction passage. The machine oil is prevented from entering the gas passage composed of the lower through hole, the middle through hole and the upper suction passage from the outer side of the suction structure, so as to effectively improve the sealing performance of the outer side of the gas passage in the suction structure, thereby preventing the effective volume of the upper cylinder and the lower cylinder from being deteriorated.

[0007] As an embodiment, the upper slot and the lower slot are both arc-shaped slot structures, and the upper boss and the lower boss are both arc-shaped plate structures.

[0008] As an implementation form, the projection of the upper slot in the axial direction overlaps with the lower slot, and the upper boss and the lower boss are symmetrically arranged relative to the middle partition plate.

[0009] As an implementation form, the outer side surface of the upper boss and the outer side surface of the lower boss are located on the same circumferential surface as the outer circumferential surface of the middle partition plate.

[0010] As an implementation form, the arc length line between the two ends of the lower through hole in the circumferential direction is projected in the radial direction within the arc length region of the lower slot; and the arc length line between the two ends of the upper air suction channel in the circumferential direction is projected in the radial direction within the arc length region of the upper slot.

[0011] As an implementation form, the arc length of the lower slot in the circumferential direction is greater than the arc length between the two ends of the lower through hole in the circumferential direction; and the arc length of the upper slot in the circumferential direction is greater than the arc length between the two ends of the upper air suction channel in the circumferential direction.

[0012] As an implementation form, the upper air suction channel is a slanted slot structure.

[0013] The second aspect of the embodiment of the utility model provides a double cylinder pump body structure, it includes the air suction structure of double cylinder pump body of any embodiment above. According to the double cylinder pump body structure of the utility model embodiment, by the structural cooperation of middle partition plate and upper cylinder, lower cylinder, can effectively improve the sealing property of the outside of gas passage inside air suction structure.

[0014] The third aspect of the embodiment of the utility model provides a compressor, it includes the double cylinder pump body structure of any embodiment above. According to the compressor of the utility model embodiment, by the structural cooperation of middle partition plate and upper cylinder, lower cylinder, can effectively improve the sealing property of the outside of gas passage inside air suction structure.

[0015] In order to better understand and implement, the utility model is described in detail below with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structure schematic diagram of the air suction structure of the double cylinder pump body of the embodiment of the utility model;

[0017] Figure 2 It is one of the exploded schematic diagram of the air suction structure of the double cylinder pump body of the embodiment of the utility model;

[0018] Figure 3 It is the second of the exploded schematic diagram of the air suction structure of the double cylinder pump body of the embodiment of the utility model;

[0019] Figure 4 It is the structure schematic diagram of the upper cylinder of the embodiment of the utility model;

[0020] Figure 5 Structure diagram of the middle partition plate of the embodiment of the utility model;

[0021] Figure 6 Structure diagram of the lower cylinder of the embodiment of the utility model;

[0022] Figure 7 Structure diagram of the compressor of the embodiment of the utility model.

[0023] Explanation of reference signs:

[0024] 10, upper cylinder; 11, upper compression chamber; 12, upper suction passage; 13, upper insertion slot; 20, middle partition plate; 21, upper boss; 22, lower boss; 23, middle through hole; 30, lower cylinder; 31, lower compression chamber; 32, lower suction passage; 33, lower through hole; 34, lower insertion slot; 100, suction structure; 200, double-cylinder pump body structure; 300, compressor. DETAILED DESCRIPTION

[0025] For further explanation of each embodiment, the utility model provides drawings. These drawings are part of the utility model disclosure, which mainly serves to explain the embodiment, and can explain the operation principle of the embodiment in cooperation with the related description of the specification. With reference to these contents, those skilled in the art should understand other possible embodiments and advantages of the utility model.

[0026] In the related art, the pump body structure of the double-cylinder compressor adopts two gas outlet pipes, which not only increases the volume, but also doubles the sealing requirement. In addition, for some small-size double-cylinder compressors, the sealing distance of the edge of the suction passage arranged inside becomes smaller and smaller due to the size limitation, and the outside of the suction passage only relies on the tension of the refrigerant oil to form a sealing oil film. Under high load operation, a small amount of refrigerant oil is easily sucked into the cylinder, which causes the effective volume of the cylinder to deteriorate.

[0027] Therefore, the utility model embodiment provides a double-cylinder pump body suction structure 100, and a double-cylinder pump body structure and a compressor with the same. According to the double-cylinder pump body suction structure 100 and the double-cylinder pump body structure and the compressor with the same, the structure of the middle partition plate 20, the upper cylinder 10 and the lower cylinder 30 can effectively improve the sealing performance of the outside of the suction passage in the double-cylinder pump body suction structure 100.

[0028] Please refer to Figures 1 to 7The utility model discloses a first aspect provides a kind of suction structure 100 of double cylinder pump body, including upper cylinder 10, middle partition 20, lower cylinder 30, the upper cylinder 10 with the lower cylinder 30 are respectively arranged in the upper, lower end surface of the middle partition 20;The middle part of the upper cylinder 10 is opened and passed and is provided with upper compression cavity 11, the middle part of the lower cylinder 30 is opened and passed and is provided with lower compression cavity 31, the outer lateral wall of the lower cylinder 30 is provided with lower suction passage 32 being communicated with the lower compression cavity 31;The end surface of the lower cylinder 30 being connected with the middle partition 20 is provided with lower through hole 33 being communicated with the lower suction passage 32, the middle partition 20 is opened and passed and is provided with middle through hole 23 being communicated with the lower through hole 33 and same size in its two ends, the upper cylinder 10 is provided with upper suction passage 12 being communicated with the middle through hole 23 and the upper compression cavity 11;The end surface of the lower cylinder 30 being connected with the middle partition 20 is provided with lower insertion slot 34, and the lower insertion slot 34 is located between the outer side of the lower cylinder 30 and the lower through hole 33;The end surface of the upper cylinder 10 being connected with the middle partition 20 is provided with upper insertion slot 13, and the upper insertion slot 13 is located between the outer side of the upper cylinder 10 and the upper suction passage 12;The upper end surface of the middle partition 20 is provided with upper boss 21, and the upper boss 21 is embedded in the upper insertion slot 13, and the lower end surface of the middle partition 20 is provided with lower boss 22, and the lower boss 22 is embedded in the lower insertion slot 34.

[0029] Therefore, the air suction structure 100 of the double-cylinder pump body according to the embodiment of the utility model, the lower suction passage 32 that communicates the lower compression chamber 31 is set up outside the lower cylinder 30, and the lower through hole 33 that communicates with the lower suction passage 32 is set up in the lower cylinder 30, the middle through hole 23 that communicates with the lower through hole 33 is set up on the middle partition plate 20, and the upper suction passage 12 that communicates with the middle through hole 23 is set up in the upper cylinder 10, so that the air suction structure 100 is single-port air suction structure 100, and the gas sucked from the air suction port of the lower suction passage 32 enters the lower compression chamber 31 through the lower suction passage 32, and enters the upper compression chamber 11 along the gas passage formed by the lower through hole 33, the middle through hole 23 and the upper suction passage 12, so that the number of air suction pipes and the sealing cost of the air suction port can be reduced. In addition, in the case of a small size machine, the gas passage formed by the lower through hole 33, the middle through hole 23 and the upper suction passage 12 has a gap at the connection between the lower cylinder 30 and the middle partition plate 20 and the connection between the middle partition plate 20 and the upper cylinder 10, respectively. The upper boss 21 and the lower boss 22 provided on the upper and lower end faces of the middle partition plate 20 are embedded with the upper slot 13 of the upper cylinder 10 and the lower slot 34 of the lower cylinder 30, respectively, so as to close the outer circumferential side of the connection between the lower through hole 33 and the middle through hole 23 and the outer side of the connection between the middle through hole 23 and the upper suction passage 12, so as to prevent the oil from entering the gas passage formed by the lower through hole 33, the middle through hole 23 and the upper suction passage 12 from the outside of the air suction structure 100, and effectively improve the sealing performance of the outer side of the gas passage inside the air suction structure 100, so as to prevent the effective volume of the upper cylinder 10 and the lower cylinder 30 from being deteriorated.

[0030] Specifically, in the embodiment of the utility model, the projection of the arc length line between the two ends of the lower through hole 33 in the circumferential direction on the radial direction is located in the arc length area of the lower slot 34; the projection of the arc length line between the two ends of the upper suction passage 12 in the circumferential direction on the radial direction is located in the arc length area of the upper slot 13. It can be understood that in the embodiment of the utility model, the arc length line of the lower through hole 33 at one end close to the outer side of the lower cylinder 30 is located in the arc length area of the lower slot 34, so that the outer side of the connection between the lower through hole 33 and the middle through hole 23 and the outer side of the air suction structure 100 can be separated by the lower boss 22 embedded in the lower slot 34; similarly, the arc length line of the upper suction passage 12 at one end close to the upper cylinder 10 is located in the arc length area of the upper slot 13, so that the outer side of the connection between the upper suction passage 12 and the middle through hole 23 and the outer side of the air suction structure 100 are separated by the upper boss 21 embedded in the upper slot 13, which can effectively prevent the oil from directly entering the gas passage formed by the through hole, the middle through hole 23 and the upper suction passage 12 from the gap of the outer wall of the air suction structure 100.

[0031] Optionally, in some embodiments of the utility model, the upper slot 13 and the lower slot 34 are both arc-shaped slot structures, and the upper boss 21 and the lower boss 22 are both arc-shaped plate structures. In these embodiments, the projection of the upper slot 13 in the axial direction overlaps the lower slot 34, and the upper boss 21 and the lower boss 22 are symmetrically arranged relative to the middle partition plate 20. In addition, the outer side surface of the upper boss 21 and the outer side surface of the lower boss 22 are both located on the same circumferential surface as the outer circumferential surface of the middle partition plate 20.

[0032] Optionally, in some embodiments of the utility model, the arc length of the lower slot 34 in the circumferential direction is greater than the arc length between the two ends of the lower through hole 33 in the circumferential direction, and the arc length of the upper slot 13 in the circumferential direction is greater than the arc length between the two ends of the upper air suction channel 12 in the circumferential direction. It can be understood that, in these embodiments, the arc length of the upper boss 21 and the lower boss 22 is greater than the arc length of the middle through hole 23, so that the blocking effect of the upper boss 21 and the lower boss 22 is better.

[0033] Optionally, in some embodiments of the utility model, the upper air suction channel 12 is a chute structure. It can be understood that, by adopting the chute structure, the air suction efficiency of the upper cylinder 10 can be improved, and the efficiency of discharging gas into the upper compression chamber 11 is higher.

[0034] The second aspect of the embodiment of the utility model provides a double-cylinder pump body structure 200, which comprises the air suction structure 100 of the double-cylinder pump body of any one of the above-mentioned embodiments. According to the double-cylinder pump body structure 100 of the embodiment of the utility model, by matching the structures of the middle partition plate 20, the upper cylinder 10 and the lower cylinder 30, the sealing performance of the outer side of the gas channel inside the air suction structure can be effectively improved.

[0035] The third aspect of the embodiment of the utility model provides a compressor 300, which comprises the double-cylinder pump body structure 200 of any one of the above-mentioned embodiments. According to the compressor 300 of the embodiment of the utility model, by matching the structures of the middle partition plate 20, the upper cylinder 10 and the lower cylinder 30, the sealing performance of the outer side of the gas channel inside the air suction structure can be effectively improved.

[0036] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the device or element indicated to have a specific orientation, to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model.

[0037] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the utility model double-cylinder pump body suction structure and compressor. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, several modifications and improvements can be made, which belong to the protection scope of the utility model.

Claims

1. A suction structure for a dual-cylinder pump body, characterized in that: The device includes an upper cylinder, a middle partition, and a lower cylinder. The upper cylinder and the lower cylinder are respectively disposed on the upper and lower end faces of the middle partition. An upper compression chamber is formed through the middle of the upper cylinder, and a lower compression chamber is formed through the middle of the lower cylinder. A lower intake channel communicating with the lower compression chamber is formed on the outer side wall of the lower cylinder. A lower through hole communicating with the lower intake channel is formed on the end face of the lower cylinder connected to the middle partition. A middle through hole of the same size is formed through both ends of the middle partition and communicates with the lower through hole. An upper intake channel communicating with the middle through hole and the upper compression chamber is formed on the upper cylinder. The lower cylinder has a lower slot on its end face connected to the middle partition plate, and the lower slot is located between the outer side of the lower cylinder and the lower through hole; the upper cylinder has an upper slot on its end face connected to the middle partition plate, and the upper slot is located between the outer side of the upper cylinder and the upper intake channel; the upper end face of the middle partition plate has an upper boss, which is fitted into the upper slot, and the lower end face of the middle partition plate has a lower boss, which is fitted into the lower slot.

2. The suction structure of the dual-cylinder pump body according to claim 1, characterized in that: Both the upper slot and the lower slot are arc-shaped groove structures, and both the upper boss and the lower boss are arc-shaped plate structures.

3. The suction structure of the dual-cylinder pump body according to claim 2, characterized in that: The projection of the upper slot in the axial direction overlaps with the lower slot, and the upper boss and the lower boss are symmetrically arranged with respect to the middle partition.

4. The suction structure of the dual-cylinder pump body according to claim 3, characterized in that: The outer surfaces of the upper boss and the lower boss are all located on the same circumferential surface as the outer circumferential surface of the middle partition.

5. The suction structure of the dual-cylinder pump body according to claim 2, characterized in that: The projection of the arc length line between the two ends of the lower through hole in the circumferential direction in the radial direction is located within the arc length region of the lower slot; the projection of the arc length line between the two ends of the upper suction channel in the circumferential direction in the radial direction is located within the arc length region of the upper slot.

6. The suction structure of the dual-cylinder pump body according to claim 5, characterized in that: The arc length of the lower slot in the circumferential direction is greater than the arc length between the two ends of the lower through hole in the circumferential direction; the arc length of the upper slot in the circumferential direction is greater than the arc length between the two ends of the upper intake channel in the circumferential direction.

7. The suction structure of the dual-cylinder pump body according to claim 1, characterized in that: The upper air intake channel has an inclined groove structure.

8. A dual-cylinder pump body structure, characterized in that: The suction structure includes the dual-cylinder pump body as described in any one of claims 1 to 7.

9. A compressor, characterized in that: It includes the dual-cylinder pump body structure as described in claim 8.

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