Refrigerant compressor and heating and ventilation equipment

Abstract

The utility model relates to a refrigerant compressor and heating and ventilation equipment. The refrigerant compressor comprises a compressor shell, a stator, a rotor and a pump body structure, a combination part and a concave part are arranged on the outer peripheral side of the stator, the air displacement of the pump body structure is V, the area of a gap formed between the concave part and the compressor shell is S1, a first refrigerant channel is formed between the outer peripheral side of the stator and the inner peripheral side of the stator, the area of the first refrigerant channel is S2, and the area of the first refrigerant channel is S1. A first refrigerant channel is formed in the compressor shell, the area of a gap formed between the stator and the rotor is S3, a second refrigerant channel is formed in the rotor, the area of the second refrigerant channel is S4, the total area, allowing refrigerants to pass through in the axial direction, of the interior of the compressor shell is S, and S meets the relation that S = S1 + S2 + S3 + S4; v and S meet the relation that 10 mm < = V / S < = 15 mm. According to the utility model, a refrigerant and refrigerating machine oil can be fully separated, the oil discharge problem of the compressor can be effectively improved, and the working efficiency of the compressor is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a compressor technical field especially is related to a refrigerant compressor and heating and ventilation equipment. BACKGROUND

[0002] The compressor is generally composed of a compressor shell, a pump body, a stator, a rotor and a liquid accumulator. During the compression process of the pump body, the refrigerant oil is dissolved in the refrigerant, and then the refrigerant mixed with the refrigerant oil is discharged from the upper end of the compressor shell through the refrigerant passage of the stator and the rotor and the space above the stator. In this process, the refrigerant oil is gradually separated from the gaseous refrigerant under the action of gravity and speed change, and returns to the lower end of the compressor shell through the gap between the stator and the compressor shell.

[0003] Among them, the compressor with small outer diameter and large displacement is more and more popular. However, due to the limited space of the compressor with small outer diameter, after the refrigerant oil is separated from the refrigerant in the space above the pump body, the channel area for the refrigerant oil to descend is insufficient, which easily causes a large amount of refrigerant oil to float above the stator or in the area between the pump body and the stator. In this way, the refrigerant oil falling back to the lower end of the compressor will be reduced, and the low oil level easily leads to insufficient lubrication of the pump body, reducing the service life of the compressor. In addition, since the refrigerant oil floats at the upper end of the compressor, the refrigerant discharge process will mix with the refrigerant oil in the floating state again, causing more refrigerant oil to be mixed in the refrigerant discharged outside the compressor, affecting the heat exchange efficiency of the air conditioning system. SUMMARY

[0004] Therefore, the refrigerant compressor and the heating and ventilation equipment provided by the utility model can separate the refrigerant and the refrigerant oil sufficiently, effectively improve the oil discharge problem of the refrigerant compressor, and further improve the working efficiency of the refrigerant compressor.

[0005] In order to achieve the above-mentioned purpose, the utility model embodiment provides a kind of refrigerant compressor, including compressor shell, stator, rotor, pump body structure;The outer circumferential side of the stator is provided with combination part and recess, the combination part is connected with the inner wall of the compressor shell, and the recess is formed gap cooperation with the inner wall of the compressor shell;The rotor is coaxially arranged in the inside of the stator, and the rotor and the stator form gap cooperation;The pump body structure is arranged on the inner wall of the compressor shell, and the pump body structure is below the stator and the rotor, and the rotor and the pump body structure are drivingly connected;

[0006] The pump body structure has a discharge volume V, a gap area S1 formed between the recess and the compressor housing, a first refrigerant passage formed between a coil slot of the stator and a coil in the slot, an area S2 of the first refrigerant passage, a gap area S3 formed between the stator and the rotor, a second refrigerant passage provided in the rotor, an area S4 of the second refrigerant passage, and a total area S of the inside of the compressor housing for refrigerant passing in the axial direction, the S satisfying the relationship: S=S1+S2+S3+S4; and the V and the S satisfy the relationship: 10mm≤V / S≤15mm.

[0007] Therefore, according to the refrigerant compressor of the embodiment of the present application, by improving the structure of the stator and the rotor, and limiting the ratio between the total area S for refrigerant passing formed by the stator, the rotor and the compressor housing and the discharge volume V of the pump body structure to 10mm≤V / S≤15mm, the iron loss of the compressor can be kept on a good basis, while effectively reducing the discharge amount of the refrigerant oil of the compressor, thereby reducing the discharge of the refrigerant oil of the compressor, keeping the oil surface of the pump body structure in a normal liquid level state, and effectively prolonging the service life of the pump body structure and the compressor; in addition, by providing the recess on the outer peripheral side of the stator, the contact surface between the stator and the compressor housing is reduced, and the deformation of the stator after being installed in the compressor housing by the combined part can be avoided.

[0008] As an embodiment, the inner diameter of the compressor housing is D, and the D satisfies the relationship: 4V / πD2≥1.2mm; wherein π is the circular constant.

[0009] As an embodiment, the pump body structure is provided with an oil return passage penetrating in the axial direction, the area of the oil return passage is S5, the S5 and the V satisfy the relationship: 8mm≤V / S5≤12mm; and the S5 and the S satisfy the relationship: 0.7≤S / S5≤0.9. By adopting such a structure design, the ratio between the area S5 of the oil return passage on the pump body structure and the discharge volume V of the pump body structure is limited to 8mm≤V / S5≤12mm to ensure the smooth return of the refrigerant oil of the pump body structure, and the ratio between the area S5 of the oil return passage on the pump body structure and the total area S for refrigerant passing formed by the stator, the rotor and the compressor housing is limited to 0.7≤S / S5≤0.9 to effectively ensure that the return of the refrigerant oil is maintained in a good state, so that the oil surface of the pump body structure can be kept in a normal liquid level state, effectively prolonging the service life of the pump body structure and the compressor.

[0010] As an implementation form, the pump body structure comprises an upper bearing, a cylinder and a lower bearing arranged coaxially, the cylinder is internally provided with a compression cavity with two open ends, and the outer wall of the cylinder is recessed inward in the radial direction to form an air inlet channel communicating with the compression cavity, and the upper bearing and the lower bearing are arranged at the upper and lower openings of the compression cavity, respectively.

[0011] As an implementation form, the outer periphery of the cylinder is provided with a flange portion which is connected with the inner peripheral wall of the compressor shell; and a plurality of arc-shaped channels penetrating through both ends of the cylinder are distributed on the cylinder in the circumferential direction, and the plurality of arc-shaped channels jointly form the oil return channel.

[0012] As an implementation form, the outer periphery of the stator is uniformly provided with a plurality of joint portions, and the recessed portion is arranged between two adjacent joint portions and is recessed inward from the outer periphery of the stator, and the arc length of the recessed portion in the circumferential direction is less than the arc length of the joint portion in the circumferential direction.

[0013] As an implementation form, the compressor shell is a closed container for storing refrigeration oil, and the pump body structure is used for compressing refrigerant.

[0014] As an implementation form, at least a natural refrigerant or an HFC type refrigerant or an HFO type refrigerant is used as the refrigerant compressed by the pump body structure.

[0015] As an implementation form, the natural refrigerant is at least one of R290 and CO2, or a mixture containing the same; the HFC type refrigerant is at least one of R32, R410A, R134a, R404A and R407C, or a mixture containing the same; and the HFO type refrigerant is at least one of R454B, R454C, R513A and R1234yf, or a mixture containing the same.

[0016] As an implementation form, the refrigeration oil is at least one of POE oil and PVE oil, or a mixture containing the same.

[0017] As an implementation form, the V and the S satisfy the relationship: V / S = 12 mm.

[0018] As an implementation form, the S5 and the V satisfy the relationship: V / S5 = 10 mm; and the S5 and the S satisfy the relationship: S / S5 = 0.9.

[0019] The utility model embodiment second aspect provides a kind of heating equipment, including the refrigerant compressor of any embodiment above. According to the heating equipment of the utility model embodiment, refrigerant and refrigerating machine oil can be fully separated, which can effectively improve the oil discharge problem of refrigerant compressor, and further improve the service life and working efficiency of refrigerant compressor.

[0020] For better understanding and implementation, the utility model is described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is one of structure schematic diagram of the refrigerant compressor of the utility model embodiment;

[0022] Figure 2 It is Figure 1 It is the enlarged schematic view of A part shown in figure;

[0023] Figure 3 It is the second structure schematic diagram of the refrigerant compressor of the utility model embodiment;

[0024] Figure 4 It is the structure schematic diagram of the cylinder of the refrigerant compressor of the utility model embodiment;

[0025] Figure 5 It is the curve relation diagram between the oil amount and stator iron loss of the compressor housing of the utility model embodiment;

[0026] Figure 6 It is the curve relation diagram between the oil surface height and V / S5 of the refrigerant compressor of the utility model embodiment.

[0027] EXPLANATION OF REFERENCE NUMERALS:

[0028] 10, compressor housing;20, stator;21, joint;22, recess;23, first refrigerant passage;30, rotor;31, second refrigerant passage;40, cylinder;41, compression cavity;42, oil return passage;43, flange part. DETAILED DESCRIPTION

[0029] To further illustrate each embodiment, the utility model provides drawings. These drawings are part of the utility model disclosure, mainly used to illustrate the embodiment, and can cooperate with the relevant description of the specification to explain the operation principle of the embodiment. With reference to these contents, those skilled in the art should understand other possible embodiments and the advantages of the utility model.

[0030] In the related art, compressors with small outer diameter and large displacement are increasingly popular. However, due to the limited space of the small outer diameter compressor, after the refrigeration oil and the refrigerant are separated in the space above the pump body, the channel area for the refrigeration oil to drop is insufficient, which easily causes a large amount of refrigeration oil to float above the stator or in the area between the pump body and the stator. In this way, the refrigeration oil falling to the lower end of the compressor will be reduced, and the low oil level easily causes insufficient lubrication of the pump body, reducing the service life of the compressor. In addition, due to the refrigeration oil floating at the upper end of the compressor, the refrigerant discharge process will again mix with the refrigeration oil in the floating state, causing more refrigeration oil to be mixed in the refrigerant discharged outside the compressor, affecting the heat exchange efficiency of the air conditioning system.

[0031] Therefore, the refrigerant compressor and the heating and ventilation equipment provided in the embodiments of the present application can separate the refrigerant and the refrigeration oil sufficiently, effectively improve the oil discharge problem of the refrigerant compressor, and further improve the service life and working efficiency of the refrigerant compressor.

[0032] Please refer to Figures 1 to 4 The first aspect of the embodiments of the present application provides a refrigerant compressor, which comprises a compressor shell 10, a stator 20, a rotor 30 and a pump body structure. The outer peripheral side of the stator 20 is provided with a joint portion 21 and a recessed portion 22. The joint portion 21 is connected with the inner peripheral wall of the compressor shell 10 in a matched manner, and the recessed portion 22 forms a gap cooperation with the inner peripheral wall of the compressor shell 10. The rotor 30 is coaxially arranged inside the stator 20, and the rotor 30 and the stator 20 form a gap cooperation. The pump body structure is arranged on the inner peripheral wall of the compressor shell 10, and the pump body structure is located below the stator 20 and the rotor 30. The rotor 30 is drivingly connected with the pump body structure.

[0033] The discharge capacity of the pump body structure is V, the gap area formed between the recessed portion 22 and the compressor shell 10 is S1, the first refrigerant channel 23 is formed between the coil groove of the stator 20 and the coil in the groove, the area of the first refrigerant channel 23 is S2, the gap area formed between the stator 20 and the rotor 30 is S3, the second refrigerant channel 31 is arranged in the rotor 30, the area of the second refrigerant channel 31 is S4, and the total area of the refrigerant passing through the inside of the compressor shell 10 along the axial direction is S. The S satisfies the relationship: S=S1+S2+S3+S4. The V and the S satisfy the relationship: 10mm≤V / S≤15mm.

[0034] Specifically, in the embodiment of the present application, the inner diameter of the compressor shell 10 is D, and the D satisfies the relationship: 4V / πD2≥1.2mm; wherein π is the circular constant. In addition, the coil slot of the stator 20 and the coil in the slot can be understood as follows: the stator 20 includes an annular stator yoke and a plurality of stator teeth extending radially inwardly on the inner circumferential side of the stator yoke, the coil slot is formed between the adjacent two stator teeth, and the coil group is wound in the coil slot to form the coil in the slot.

[0035] As shown in Figure 5 Figure 5 The figure is the curve relationship between the oil amount of the compressor shell 10 and the iron loss of the stator 20 of the embodiment of the present application. From Figure 5 it can be seen that the relationship between V / S and the oil amount is proportional, and the relationship between V / S and the iron loss of the stator 20 is inversely proportional; when V / S≤15mm, the oil amount curve is relatively stable and at a low level, but when V / S>15mm, the oil amount curve rises rapidly and is at a high level; in addition, when V / S≤10mm, although the curve of the iron loss of the stator 20 shows a downward trend, the iron loss of the stator 20 is in a state of obvious deterioration, and when V / S>15mm, the curve of the iron loss of the stator 20 is relatively stable and at a low level. Therefore, by comprehensively considering the influence of the oil amount of the compressor shell 10 and the iron loss of the stator 20, when the proportion range of V / S is limited to 10mm≤V / S≤15mm, the refrigerant compressor of the embodiment of the present application can effectively reduce the discharge amount of the refrigeration oil of the compressor while keeping the iron loss of the stator 20 low, thereby improving the oil discharge problem of the compressor and improving the performance of the compressor.

[0036] Therefore, according to the refrigerant compressor of the embodiment of the present application, by improving the structure of the stator 20 and the rotor 30, and limiting the proportion between the total area S for the refrigerant to pass formed by the stator 20, the rotor 30 and the compressor shell 10 and the discharge amount V of the pump body structure to 8mm≤V / S≤15mm, the iron loss of the compressor can be kept on a good basis while effectively reducing the discharge amount of the refrigeration oil of the compressor, thereby reducing the refrigeration oil discharged by the compressor, keeping the oil surface of the pump body structure at a normal liquid level, effectively prolonging the service life of the pump body structure and the compressor; in addition, by providing the recessed portion 22 on the outer circumferential side of the stator 20, the contact area between the stator 20 and the compressor shell 10 is reduced, which can avoid the deformation of the stator 20 after the stator 20 is installed on the compressor shell 10 by the combined portion 21.

[0037] ​In addition, in the embodiment of the utility model, the pump body structure is provided with an oil return channel 42 which is opened through in axial direction, the area of the oil return channel 42 is S5, S5 and V satisfy the relation: 8mm≤V / S5≤12mm, S5 and S satisfy the relation: 0.7≤S / S5≤0.9. By adopting such structure design, the ratio between the area S5 of the oil return channel 42 on the pump body structure and the displacement V of the pump body structure is limited to 8mm≤V / S5≤12mm, so as to ensure the oil return of the pump body structure, and the ratio between the area S5 of the oil return channel 42 on the pump body structure and the total area S of the stator 20, the rotor 30 and the compressor shell 10 which are formed together for the refrigerant to pass through is limited to 0.7≤S / S5≤0.9, so as to effectively ensure that the backfall of the refrigeration oil is maintained in a good state, so that the oil level of the pump body structure can be maintained in a normal liquid level state, and the service life of the pump body structure and the compressor is effectively prolonged.

[0038] As shown in Figure 6 , Figure 6 It is the oil level height and the curve relation diagram of V / S5 of the refrigerant compressor of the embodiment of the utility model. From Figure 6 It can be seen that the relation between V / S5 and the oil level height is inversely proportional, when V / S5 is limited to V / S5≤12mm, the oil level height is at a relatively high level, and the curve change is small, but when V / S5>12mm, the oil level height rapidly reduces and deteriorates, in addition, due to the structure limitation of the pump body structure itself, when V / S5<8mm, the machining difficulty increases. Therefore, when V / S5 is in the ratio range of 8mm≤V / S5≤12mm, the backfall of the refrigeration oil can be effectively ensured to be maintained in a good state, so that the oil level height of the compressor shell 10 is maintained at a high position.

[0039] Optionally, in some embodiments of the utility model, the pump body structure includes coaxially arranged upper bearing, cylinder 40, lower bearing, the inside of the cylinder 40 is provided with the compression cavity 41 of two ends opening, the outer side wall of the cylinder 40 is recessed to form the air inlet channel of the compression cavity 41 along the radial direction inward, the upper bearing and the lower bearing are arranged at the upper and lower openings of the compression cavity 41 respectively. Wherein, the outer circumferential side of the cylinder 40 is provided with flange part 43, the flange part 43 is matched and connected with the inner circumferential wall of the compressor shell 10, the cylinder 40 is distributed with several arc-shaped channels which are opened through both ends of the cylinder 40 along the circumferential direction, and the several arc-shaped channels jointly form the oil return channel 42.

[0040] It is worth understanding that in other embodiments of the utility model, the pump body structure can also be provided with an oil return channel 42 for the refrigeration oil to return through the upper bearing, and in these embodiments, the outer diameter of the upper bearing is designed to be larger than the outer diameter of the cylinder 40, and the pump body structure is connected with the compressor shell 10 through the outer peripheral side of the upper bearing. That is to say, the oil return channel 42 of the utility model can be provided on the upper bearing or the cylinder 40, and the specific setting can be made according to the requirements.

[0041] Optionally, in some embodiments of the utility model, the outer peripheral side of the stator 20 is uniformly provided with a plurality of joint parts 21, and the recessed part 22 is arranged between the adjacent two joint parts 21, the recessed part 22 is formed by recessing inward from the outer peripheral side of the stator 20, and the arc length of the recessed part 22 in the circumferential direction is less than the arc length of the joint part 21 in the circumferential direction. It can be understood that in these embodiments, by arranging the recessed part 22 on the outer peripheral side of the stator 20, the contact surface between the stator 20 and the compressor shell 10 is reduced, and the adverse phenomenon of deformation of the stator 20 after being heat shrink fitted with the compressor shell 10 can be avoided.

[0042] The following will be combined Figures 1 to 6 The following will be combined

[0043] The refrigerant compressor of the embodiment comprises a compressor shell 10, a stator 20, a rotor 30 and a pump body structure. The outer peripheral side of the stator 20 is provided with a joint part 21 and a recessed part 22. The joint part 21 is connected with the inner peripheral wall of the compressor shell 10 in a matched mode, and the recessed part 22 forms a gap cooperation with the inner peripheral wall of the compressor shell 10. The rotor 30 is coaxially arranged inside the stator 20, and the rotor 30 forms a gap cooperation with the stator 20. The pump body structure is arranged on the inner peripheral wall of the compressor shell 10, and is located below the stator 20 and the rotor 30. The rotor 30 is drivingly connected with the pump body structure. The discharge volume of the pump body structure is V, the gap area between the recessed part 22 and the compressor shell 10 is S1, the first refrigerant channel 23 is formed between the coil groove of the stator 20 and the coil in the groove, the area of the first refrigerant channel 23 is S2, the gap area between the stator 20 and the rotor 30 is S3, the second refrigerant channel 31 is arranged in the rotor 30, the area of the second refrigerant channel 31 is S4, and the total area of the refrigerant passing through the inside of the compressor shell 10 along the axial direction is S. The S satisfies the relationship: S=S1+S2+S3+S4. The V and the S satisfy the relationship: V / S=10mm.

[0044] Further, the inner diameter of the compressor shell 10 is D, and the D satisfies the relationship: 4V / πD2=1.2mm. In addition, the pump body structure is provided with an oil return channel 42 in the axial direction, the area of the oil return channel 42 is S5, and the S5 and the V satisfy the relationship: V / S5=8mm; the S5 and the S satisfy the relationship: S / S5=0.8.

[0045] In the embodiment, the pump body structure comprises an upper bearing, a cylinder 40 and a lower bearing arranged coaxially, the cylinder 40 is internally provided with a compression cavity 41 with two open ends, the outer side wall of the cylinder 40 is recessed inward in the radial direction to form an air inlet channel communicating with the compression cavity 41, and the upper bearing and the lower bearing are arranged at the upper and lower openings of the compression cavity 41 respectively. The outer periphery of the cylinder 40 is provided with a flange portion 43, and the flange portion 43 is connected with the inner peripheral wall of the compressor shell 10. A plurality of arc-shaped channels penetrating through both ends of the cylinder 40 are distributed on the cylinder 40 in the circumferential direction, and the plurality of arc-shaped channels jointly form the oil return channel 42. In addition, the outer periphery of the stator 20 is uniformly provided with a plurality of joint portions 21, and the recessed portion 22 is arranged between the adjacent two joint portions 21, the recessed portion 22 is recessed inward from the outer periphery of the stator 20, and the arc length of the recessed portion 22 in the circumferential direction is less than the arc length of the joint portion 21 in the circumferential direction.

[0046] The following will be described in detail Figures 1 to 6 It should be understood that the following embodiments are only exemplary and should not be construed as limiting the present application.

[0047] The refrigerant compressor of the embodiment comprises a compressor housing 10, a stator 20, a rotor 30, and a pump body structure. The outer circumferential side of the stator 20 is provided with a joint portion 21 and a recessed portion 22. The joint portion 21 is connected with the inner circumferential wall of the compressor housing 10. The recessed portion 22 is gap-connected with the inner circumferential wall of the compressor housing 10. The rotor 30 is coaxially arranged inside the stator 20, and the rotor 30 is gap-connected with the stator 20. The pump body structure is arranged on the inner circumferential wall of the compressor housing 10, and is located below the stator 20 and the rotor 30. The rotor 30 is drivingly connected with the pump body structure. The discharge volume of the pump body structure is V. The gap area between the recessed portion 22 and the compressor housing 10 is S1. The first refrigerant passage 23 is formed between the coil slot of the stator 20 and the coil in the slot. The area of the first refrigerant passage 23 is S2. The gap area between the stator 20 and the rotor 30 is S3. The second refrigerant passage 31 is arranged in the rotor 30. The area of the second refrigerant passage 31 is S4. The total area of the refrigerant passing through the inside of the compressor housing 10 along the axial direction is S. The S satisfies the relationship: S=S1+S2+S3+S4. The V and the S satisfy the relationship: V / S=12 mm.

[0048] Further, the inner diameter of the compressor housing 10 is D. The D satisfies the relationship: 4V / πD2=1.2 mm. In addition, the pump body structure is provided with an oil return passage 42 penetrating along the axial direction. The area of the oil return passage 42 is S5. The V and the S5 satisfy the relationship: V / S5=10 mm. The S5 and the S satisfy the relationship: S / S5=0.9.

[0049] In the embodiment, the pump body structure comprises a coaxially arranged upper bearing, a cylinder 40, and a lower bearing. The inside of the cylinder 40 is provided with a compression cavity 41 with two open ends. The outer side wall of the cylinder 40 is recessed inward along the radial direction to form an air inlet passage communicating with the compression cavity 41. The upper bearing and the lower bearing are arranged at the upper and lower openings of the compression cavity 41, respectively. The outer circumferential side of the cylinder 40 is provided with a flange portion 43. The flange portion 43 is connected with the inner circumferential wall of the compressor housing 10. A plurality of arc-shaped passages penetrating through both ends of the cylinder 40 are distributed along the circumferential direction of the cylinder 40. The plurality of arc-shaped passages jointly form the oil return passage 42. In addition, the outer circumferential side of the stator 20 is uniformly provided with a plurality of joint portions 21. The recessed portion 22 is arranged between two adjacent joint portions 21. The recessed portion 22 is recessed inward from the outer circumferential side of the stator 20. The arc length of the recessed portion 22 in the circumferential direction is smaller than the arc length of the joint portion 21 in the circumferential direction.

[0050] The following description is made in connection with Figures 1 to 6 The following description is made in connection with

[0051] The refrigerant compressor of the embodiment comprises a compressor shell 10, a stator 20, a rotor 30, and a pump body structure. The stator 20 is provided with a joint portion 21 and a recessed portion 22 on the outer periphery side. The joint portion 21 is connected to the inner peripheral wall of the compressor shell 10. The recessed portion 22 is in clearance fit with the inner peripheral wall of the compressor shell 10. The rotor 30 is coaxially arranged inside the stator 20, and the rotor 30 is in clearance fit with the stator 20. The pump body structure is arranged on the inner peripheral wall of the compressor shell 10, and is located below the stator 20 and the rotor 30. The rotor 30 is drivingly connected to the pump body structure. The clearance area between the recessed portion 22 and the compressor shell 10 is S1. The first refrigerant passage 23 is formed between the coil slot of the stator 20 and the coil in the slot. The area of the first refrigerant passage 23 is S2. The clearance area between the stator 20 and the rotor 30 is S3. The second refrigerant passage 31 is arranged in the rotor 30. The area of the second refrigerant passage 31 is S4. The total area of the refrigerant passing through the inside of the compressor shell 10 along the axial direction is S. The S satisfies the relationship: S=S1+S2+S3+S4. The V and the S satisfy the relationship: V / S=15 mm.

[0052] Further, the inner diameter of the compressor shell 10 is D. The D satisfies the relationship: 4V / πD2=1.3 mm. In addition, the pump body structure is provided with an oil return passage 42 penetratingly arranged along the axial direction. The area of the oil return passage 42 is S5. The V and the S5 satisfy the relationship: V / S5=12 mm. The S5 and the S satisfy the relationship: S / S5=0.7.

[0053] The pump body structure of the embodiment comprises a coaxially arranged upper bearing, a cylinder 40 and a lower bearing, the cylinder 40 is internally provided with a compression cavity 41 with open ends, the outer side wall of the cylinder 40 is recessed inward along the radial direction to form an air inlet channel communicating with the compression cavity 41, and the upper bearing and the lower bearing are arranged at the upper and lower openings of the compression cavity 41 respectively. The outer circumferential side of the cylinder 40 is provided with a flange part 43, the flange part 43 is connected with the inner circumferential wall of the compressor shell 10, and a plurality of arc-shaped channels penetrating through both ends of the cylinder 40 are distributed on the cylinder 40 along the circumferential direction, and the plurality of arc-shaped channels jointly form the oil return channel 42. In addition, the outer circumferential side of the stator 20 is uniformly provided with a plurality of joint parts 21, the recessed part 22 is arranged between the adjacent two joint parts 21 and is recessed inward from the outer circumferential side of the stator 20, and the arc length of the recessed part 22 in the circumferential direction is less than the arc length of the joint part 21 in the circumferential direction.

[0054] Optionally, in the embodiment of the utility model, the compressor shell 10 is a closed container for storing refrigeration oil, and the pump body structure is used for compressing refrigerant. Among them, at least natural refrigerant or HFC type refrigerant or HFO type refrigerant is used as the refrigerant compressed by the pump body structure. In addition, the refrigeration oil is at least one of POE oil, PVE oil, or a mixture containing them.

[0055] Optionally, the natural refrigerant is at least one of R290, CO2, or a mixture containing them; the HFC type refrigerant is at least one of R32, R410A, R134a, R404A, R407C, or a mixture containing them; and the HFO type refrigerant is at least one of R454B, R454C, R513A, R1234yf, or a mixture containing them.

[0056] The second aspect of the utility model embodiment provides a heating and ventilation equipment, comprising the refrigerant compressor of any one of the above embodiments. According to the heating and ventilation equipment of the utility model embodiment, the refrigerant and the refrigeration oil can be fully separated, the oil discharge problem of the refrigerant compressor can be effectively improved, and then the service life and working efficiency of the refrigerant compressor are improved.

[0057] In the description of the utility model, it is understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0058] The above-mentioned embodiments only express several embodiments of the utility model, the description is more specific and detailed, but it cannot be understood as limiting the scope of the utility model refrigerant compressor and heating and ventilation equipment. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model.

Claims

1. A refrigerant compressor, characterized in that: comprising a compressor shell, a stator, a rotor, a pump body structure; a joint and a recess are arranged on the outer periphery of the stator, the joint is connected with the inner wall of the compressor shell, and the recess is gap-connected with the inner wall of the compressor shell; the rotor is coaxially arranged in the stator, and the rotor is gap-connected with the stator; the pump body structure is arranged on the inner wall of the compressor shell, and the pump body structure is below the stator and the rotor, and the rotor is drivingly connected with the pump body structure; the discharge volume of the pump body structure is V, the gap area between the recess and the compressor shell is S1, the first refrigerant passage is formed between the coil groove of the stator and the coil in the groove, the area of the first refrigerant passage is S2, the gap area between the stator and the rotor is S3, the second refrigerant passage is arranged in the rotor, the area of the second refrigerant passage is S4, the total area of the compressor shell for the refrigerant passing through in the axial direction is S, the S satisfies the relationship: S = S1 + S2 + S3 + S4; the V and the S satisfy the relationship: 10mm≤V / S≤15mm. 2.The refrigerant compressor according to claim 1, characterized in that: the inner diameter of the compressor shell is D, and the D satisfies the relationship: 4V / πD²≥1.2mm; wherein π is the circular constant. 3.The refrigerant compressor according to claim 1, characterized in that: the oil return passage is arranged through the pump body structure in the axial direction, the area of the oil return passage is S5, the S5 and the V satisfy the relationship: 8mm≤V / S5≤12mm; the S5 and the S satisfy the relationship: 0.7≤S / S5≤0.

9. 4.The refrigerant compressor according to claim 3, characterized in that: the pump body structure comprises coaxially arranged upper bearing, cylinder and lower bearing, the inside of the cylinder is provided with a compression cavity with two open ends, the outer side wall of the cylinder is recessed inward in the radial direction to form an air inlet channel communicating with the compression cavity, and the upper bearing and the lower bearing are arranged at the upper and lower openings of the compression cavity respectively. 5.The refrigerant compressor according to claim 4, characterized in that: the outer periphery of the cylinder is provided with a flange part, the flange part is connected with the inner wall of the compressor shell; a plurality of arc-shaped channels penetrating through both ends of the cylinder are distributed on the cylinder in the circumferential direction, and the plurality of arc-shaped channels jointly form the oil return passage. 6.The refrigerant compressor according to claim 1, characterized in that: a plurality of joints are uniformly distributed on the outer periphery of the stator, and the recess is arranged between adjacent two joints, the recess is recessed inward from the outer periphery of the stator, and the arc length of the recess in the circumferential direction is less than the arc length of the joint in the circumferential direction. 7.The refrigerant compressor according to claim 1, characterized in that: ​ ​ ​ ​ ​ ​ ​ The compressor housing is a closed container for storing refrigeration oil, and the pump body structure is used for compressing refrigerant.

8. The refrigerant compressor according to claim 7, characterized in that: As the refrigerant compressed by the pump body structure, at least a natural refrigerant or an HFC-based refrigerant or an HFO-based refrigerant is used.

9. The refrigerant compressor according to claim 8, characterized in that: The refrigerant compressor is a refrigerant compressor using one of R290, CO2 natural refrigerant; Or, the refrigerant compressor is a refrigerant compressor using one of R32, R410A, R134a, R404A, R407C HFC-based refrigerant; Or, the refrigerant compressor is a refrigerant compressor using one of R454B, R454C, R513A, R1234yf HFO-based refrigerant.

10. The refrigerant compressor according to claim 7, characterized in that: The refrigerant compressor is a refrigerant compressor using one of POE oil, PVE oil.

11. The refrigerant compressor according to claim 1, characterized in that: The V and the S satisfy the relationship: V / S = 12mm.

12. The refrigerant compressor according to claim 3, characterized in that: The S5 and the V satisfy the relationship: V / S5 = 10mm; the S5 and the S satisfy the relationship: S / S5 = 0.

9.

13. A heating and ventilation device, characterized in that: It comprises the high-energy-efficiency refrigerant compressor according to any one of claims 1 to 12.

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