Rotary compressor and refrigeration cycle device

Abstract

The present invention provides a rotor compressor and a refrigeration cycle device, the compressor includes a housing component, a motor component and a pump body component, the pump body component includes an oil-gas separation structure, the oil-gas separation structure includes at least in order: a lower flange, which includes an oil-gas separation element arranged in a cavity for separating refrigeration oil in a refrigerant; a lower flange cover plate, which is provided with oil collecting holes and oil guide holes that are interconnected to guide the separated refrigeration oil; and an oil collecting plate, which is provided with an oil collecting groove and an oil leakage hole, the oil collecting groove is used to collect the refrigeration oil from the oil collecting holes and the oil guide holes, and the oil leakage hole is used to discharge the refrigeration oil into the compressor housing. Through this first aspect, since the pump body structure that reduces the oil circulation rate is adopted, not only the lubrication and sealing performance between the moving parts of the pump body is guaranteed, but also the refrigeration oil entering the system is reduced, thereby improving the reliability of the compressor and ensuring the refrigeration capacity of the system.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and more particularly to a rolling rotor type compressor and a refrigeration cycle device having the compressor. Background Art

[0002] The compressor is responsible for compressing and supplying refrigerant in the air conditioning system (refrigeration cycle system device), so it is called the "heart" of the air conditioning. The rolling rotor compressor in the prior art includes a pump body assembly, a motor assembly and a housing assembly.

[0003] In the prior art, a rolling rotor type medium back pressure carbon dioxide compressor is disclosed, which adopts a two-stage compression principle and has two cylinders, one of which is a primary compression cylinder and the other is a secondary compression cylinder. The low-pressure refrigerant first flows into the primary compression cylinder at the bottom of the compressor, is compressed to an intermediate pressure under the action of the compression structure, and is directly discharged into the compressor housing to form a medium back pressure, and then flows into the secondary compression chamber at the top of the compressor after cooling in the intercooler. The refrigerant is compressed to a high pressure in the secondary compression chamber and then discharged. However, the secondary exhaust of this compressor is directly connected to the air conditioning system pipeline, resulting in the high-temperature and high-pressure refrigerant discharged from the secondary compression chamber carrying a large amount of refrigeration oil particles into the air conditioning system. A large amount of refrigeration oil particles entering the air conditioning system will adhere to the metal pipes of the condenser and evaporator, hindering the refrigerant in the metal pipes of the air conditioning system from exchanging heat with the outside world, thereby reducing the refrigeration capacity of the air conditioning system. At the same time, the oil level in the compressor is reduced, resulting in insufficient oil supply to the pump body parts, severe wear of the relatively moving parts, and affecting the reliability of the compressor.

[0004] With the increasing demand for compressors for air conditioners, heat pump water heaters and refrigeration, the problems caused by high oil circulation rates are becoming more and more prominent. How to ensure the normal operation of the compressor and reduce the large amount of refrigeration oil entering the air-conditioning system and reduce the oil circulation rate has become one of the key technologies in compressor research. Summary of the invention

[0005] In response to the above-mentioned problems in the prior art, the present application proposes a rolling rotor compressor and a refrigeration cycle device equipped with the compressor. The compressor body assembly has an oil-gas separation structure, which can separate the exhaust gas from the oil, thereby preventing the refrigeration oil from entering the air-conditioning system along with the high-temperature and high-pressure refrigerant during the exhaust process of the compressor, thereby improving the refrigeration capacity of the compressor, and at the same time ensuring the lubrication and sealing performance between the moving parts of the pump body, thereby improving the reliability of the compressor.

[0006] In the first aspect, the present invention provides a rotor compressor, which includes a housing component, a motor component and a pump body component, wherein the pump body component includes an oil-gas separation structure, wherein the oil-gas separation structure includes at least in order: a lower flange, which includes an oil-gas separation element disposed in a cavity for separating refrigeration oil in a refrigerant; a lower flange cover plate, which is provided with oil collecting holes and oil guide holes that are interconnected to guide the separated refrigeration oil; and an oil collecting plate, which is provided with an oil collecting groove and an oil leakage hole, wherein the oil collecting groove is used to collect the refrigeration oil from the oil collecting holes and the oil guide holes, and the oil leakage hole is used to discharge the refrigeration oil into the compressor housing. Through this first aspect, since the pump body structure that reduces the oil circulation rate is adopted, not only the lubrication and sealing performance between the moving parts of the pump body is guaranteed, but also the refrigeration oil entering the system is reduced, thereby improving the reliability of the compressor and ensuring the refrigeration capacity of the system.

[0007] In one embodiment of the first aspect, the oil-gas separation structure further comprises: a pressure drop component connected to the oil leakage hole of the oil collecting plate to reduce the pressure of the high-pressure refrigeration oil discharged from the oil leakage hole. Through this embodiment, the high-pressure refrigeration oil discharged from the oil leakage hole in the medium back pressure compressor or the low back pressure compressor can be depressurized and slowly discharged from the pressure drop component into the oil pool in the compressor housing.

[0008] In one embodiment of the first aspect, the pressure drop component is a capillary tube.

[0009] In one embodiment of the first aspect, the pressure drop component is a pressure drop disk, and the pressure drop disk is provided with a pressure drop groove.

[0010] In one embodiment of the first aspect, the oil-gas separation element comprises: a baffle and / or a grid, the baffle is used to impact the refrigeration oil in the refrigerant, the grid is used to impact and absorb the refrigeration oil in the refrigerant; and a diverter plate, which is used to guide the mixed oil and gas of the refrigerant and the refrigeration oil to flow through the baffle and / or the grid. Through this embodiment, the refrigeration oil can be impacted or absorbed by the baffle or the grid and flow into the oil collecting groove in the lower flange cover.

[0011] In one embodiment of the first aspect, the pump body assembly further includes a crankshaft, an upper flange, an upper roller, an upper sliding plate, an upper cylinder, a partition, a lower roller, a lower sliding plate and a lower cylinder.

[0012] In one embodiment of the first aspect, the rotary compressor is a single-cylinder compressor, a two-stage enthalpy increase compressor or a three-cylinder compressor.

[0013] In one embodiment of the first aspect, the rotary compressor is a compressor for an air conditioner.

[0014] In a second aspect, the present invention provides a refrigeration cycle device including a rotary compressor according to the first aspect and any one of the embodiments thereof.

[0015] Compared with the prior art, the rotary compressor of the present invention and the refrigeration cycle device including the rotary compressor have the following advantages and benefits:

[0016] (1) It can prevent the refrigeration oil from entering the air conditioning system along with the high-temperature and high-pressure refrigerant during the exhaust process of the compressor and accumulating in the metal pipes to hinder the heat exchange of the refrigerant;

[0017] (2) At the same time, the oil circulation rate is reduced, the lubrication and sealing performance between the moving parts of the pump body is guaranteed, the reliability of the compressor is improved, and the refrigeration capacity of the refrigeration system is guaranteed.

[0018] The above technical features can be combined in various suitable ways or replaced by equivalent technical features as long as the purpose of the present invention can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, wherein:

[0020] Figure 1 It shows a schematic structural diagram of an air conditioning system according to an embodiment of the present invention;

[0021] Figure 2 A schematic structural diagram of a two-stage enthalpy-increasing compressor according to an embodiment of the present invention is shown;

[0022] Figure 3 A structural cross-sectional view showing a pump body assembly of a compressor according to an embodiment of the present invention;

[0023] Figure 4 A top view of a pump assembly of a compressor according to an embodiment of the present invention is shown;

[0024] Figure 5 A schematic structural diagram showing an oil-gas separation structure of a pump assembly according to an embodiment of the present invention;

[0025] Figure 6 A cross-sectional view along line AA in FIG5 of the oil-gas separation structure of the pump assembly according to an embodiment of the present invention is shown;

[0026] Figure 7 It shows a schematic structural diagram of a lower flange according to an embodiment of the present invention;

[0027] Figure 8 It shows a schematic structural diagram of a lower flange cover according to an embodiment of the present invention;

[0028] Fig. 9The oil collecting hole and the oil guide hole of the lower flange cover plate according to the embodiment of the present invention are shown. Figure 8 The cross-sectional view of line BB in FIG.

[0029] Fig.10 A schematic structural diagram of an oil collecting plate according to an embodiment of the present invention is shown;

[0030] Fig.11 A structural cross-sectional view showing a pump assembly according to another embodiment of the present invention;

[0031] Fig.12 It shows a schematic structural diagram of a lower flange according to another embodiment of the present invention;

[0032] Fig.13 A schematic diagram of the structure of a grid according to another embodiment of the present invention is shown;

[0033] Fig.14 It shows a schematic structural diagram of a lower flange according to another embodiment of the present invention;

[0034] Fig.15 It shows a schematic structural diagram of a pressure drop disk according to another embodiment of the present invention;

[0035] Fig.16 A structural cross-sectional view of a pump assembly according to another embodiment of the present invention is shown;

[0036] Fig.17 A schematic structural diagram of a pump assembly according to yet another embodiment of the present invention is shown.

[0037] Reference numerals list:

[0038] 100-rotor compressor; 110-housing assembly; motor assembly-120; pump body assembly 130; 131-crankshaft; 132-upper flange; 133-upper roller; 134-upper sliding vane; 135-upper cylinder; 136-partition; 137-lower roller; 138-lower sliding vane; 139-lower cylinder; 140-oil-gas separation structure; 141-lower flange; 141a-baffle; 141b-diverter plate; 141c-grid; 142-lower flange cover; 142a-oil collecting hole; 142b-oil guide hole; 143-oil collecting plate; 143a-oil collecting groove; 143b-oil leakage hole 143b; 144a-capillary; 144b-pressure drop plate.

[0039] In the drawings, like reference numerals are used for like parts. The drawings are not necessarily to scale. DETAILED DESCRIPTION

[0040] The present invention will be further described below in conjunction with the accompanying drawings.

[0041] Figure 1The schematic diagram of the air conditioning system is shown in Figure 1. Figure 1 As shown, the gaseous refrigerant flowing into the compressor through the evaporator enters the primary cylinder, and the refrigerant is compressed once and discharged into the compressor shell, mixed with the refrigerant replenished through the intermediate air replenishment of the flash evaporator, and then cooled through the intermediate cooler and enters the secondary cylinder; the secondary cylinder compresses the refrigerant for a second time to form a high-temperature and high-pressure gas and discharge it into the gas cooler, and becomes a low-temperature and high-pressure gas-liquid mixed refrigerant through the gas cooler. The first part of the refrigerant is reduced in pressure by the expansion valve and enters the flash evaporator, and the second part of the refrigerant flows through the internal pipeline of the flash evaporator. The first part and the second part of the refrigerant exchange heat in the flash evaporator, and the first part of the refrigerant absorbs heat and is replenished into the compressor shell (i.e., intermediate air replenishment); the second part of the refrigerant is cooled again, and then reduced in pressure by the expansion valve and enters the evaporator, and finally is sucked into the primary cylinder through the one-way valve.

[0042] See also Figure 2 In the first embodiment, the two-stage enthalpy increasing compressor 100 includes a housing assembly 110, a motor assembly 120 and a pump assembly 130 (see Figure 2 ).like Figure 3 As shown, the pump body assembly 130 mainly includes a crankshaft 131, an upper flange 132, an upper roller 133, an upper slide 134, an upper cylinder 135, a partition 136, a lower roller 137, a lower slide 138, a lower cylinder 139 and an oil-gas separation structure 140, wherein the oil-gas separation structure 140 includes a lower flange 141, a lower flange cover plate 142, an oil collecting plate 143 and a pressure drop component. In this example, the pressure drop component can be a capillary 144a. Since the capillary 144a as a pressure reduction device is a technology known to those skilled in the art in the field of compressors, it will not be discussed in detail herein.

[0043] like Figure 2 and Figure 3 As shown, during the operation of the pump body, the rotor of the motor assembly 120 mainly drives the crankshaft 131 in the pump body assembly 130 to rotate. Figure 4As shown, the upper roller 133 is mounted on the eccentric circle of the crankshaft 131 and rotates with the crankshaft 131. Since the outer wall of the upper roller 133 and the inner wall of the upper cylinder 135 form a cavity, the air cavity is divided into two parts, namely, a low-pressure cavity and a high-pressure cavity, under the cooperation of the upper slide 134 and the upper roller 133. As the position of the upper roller 133 changes, the low-pressure cavity gradually increases to form a negative pressure to absorb low-temperature and low-pressure refrigerant, and the volume of the high-pressure cavity gradually decreases to compress the refrigerant into high-temperature and high-pressure and discharge it, thereby achieving compression of the refrigerant. The upper cylinder 135 and the lower cylinder 139 of the pump body of the two-stage reheat increasing compressor 100 can perform the above-mentioned refrigerant compression work at the same time. The upper cylinder 135 sucks the oil-gas mixed refrigerant in the refrigeration system for primary compression and then discharges it into the compressor shell to mix with the refrigerant replenished by the intermediate air supply and the refrigeration oil particles in the compressor shell. While the mixed oil-gas mixed refrigerant enters the lower cylinder 139 through the intercooler, the oil suction hole on the lower flange suction hole will suck air with oil, thereby ensuring the lubrication of the pump body and successfully completing the secondary compression of the refrigerant. The high-temperature and high-pressure refrigerant is directly discharged into the air-conditioning system after the oil and gas separation through the cavity of the lower flange 141.

[0044] like Figure 5 and Figure 6 As shown, the lower flange 141 of the pump body, the lower flange cover plate 142, the oil collecting plate 143 and the capillary 144a constitute an oil-gas separation structure 140. Figure 7 As shown, a fixed baffle 141a and a fixed diverter plate 141b are disposed in the cavity of the lower flange 141. Figure 8 and Fig. 9 As shown, the lower flange cover plate 142 is provided with an oil collecting hole 142a and an oil guiding hole 142b which are interconnected. Fig. 9 As can be seen from the figure, the refrigeration oil flows into the oil collecting hole 142a after being guided by the oil guide hole 142b, and then enters the oil collecting plate 143. Fig.10 As shown, the oil collecting plate 143 is provided with an oil collecting groove 143a and an oil leakage hole 143b. Here, the oil collecting groove 143a is an inclined structure relative to the horizontal plane to facilitate the rapid accumulation of the refrigerant oil. The oil leakage hole 143b should be arranged at the lowest point of the oil collecting groove 143a so that the refrigerant oil can be discharged into the pressure drop component or the compressor housing to the greatest extent.

[0045] like Figure 6As shown, the oil-gas mixed refrigerant compressed by the lower cylinder 139 enters the cavity of the lower flange 141 from the air inlet of the lower flange 141. Under the action of the diverter plate 141b of the lower flange 141, the oil-gas mixed refrigerant mainly flows through the baffle 141a channel in the cavity, hits the baffle 141a and the cavity wall, and the refrigeration oil is separated from the gaseous refrigerant and gathered along the baffle 141a and flows into the oil collecting hole 142a of the lower flange cover plate 142. The gaseous refrigerant is discharged from the exhaust port through the cavity of the lower flange 141. The refrigeration oil is gathered once through the oil collecting hole 142a of the lower flange cover plate 142, and then gathered again at the oil leakage hole 142b through the oil collecting groove 143a of the oil collecting plate 143, and finally returns to the inside of the compressor housing through the capillary 144a connected to the oil leakage hole 142b.

[0046] like Fig.11 As shown, the main difference between the second embodiment and the first embodiment is that: Fig.12 As shown, the lower flange 141 is provided with a grid 141c (such as Fig.13 As shown) and the diverter plate 141b. Further, as Fig.14 As shown, the lower flange 141 is provided with a grid 141c, a baffle 141a and a diverter plate 141b to achieve maximum impact and adsorption of the refrigeration oil. Fig.15 As shown, the pressure drop plate 144b is provided with a pressure drop groove 144b' (since the pressure drop plate 144b as a pressure reduction device of the compressor is an existing technology well known to those skilled in the art, it will not be discussed in detail herein). The oil-gas mixed refrigerant passes through the cavity of the lower flange 141, the refrigeration oil adheres to the grid 141c, and gathers and flows into the oil collecting hole 142a of the lower flange cover plate 142, the oil collecting groove 143a and the oil leakage hole 143b of the oil collecting plate 143, and the pressure drop groove 144b' of the pressure drop plate 144b returns the oil into the compressor housing. Here, since the structure of the compressor 100 has been described in detail above, it will not be repeated here.

[0047] like Fig.16 As shown, the compressor 100 of the third embodiment is a low back pressure single cylinder compressor, the refrigerant in the refrigeration system enters the shell and then enters the low pressure chamber of the pump body, and after being compressed, a high temperature and high pressure oil-gas mixed refrigerant is formed, and the gaseous refrigerant is directly discharged into the system after passing through the oil-gas separation structure 140, and the refrigeration oil flows through the oil-gas separation structure 140 and returns to the oil pool in the compressor shell. Here, since the structure of the compressor 100 has been described in detail above, it will not be repeated here.

[0048] like Fig.17As shown, the compressor 100 of the fourth embodiment is a high back pressure single cylinder compressor, which does not require a pressure drop component. The refrigerant in the refrigeration system directly enters the low pressure chamber of the pump body, and after being compressed, the high temperature and high pressure oil-gas mixed refrigerant is formed. After passing through the oil-gas separation component, the gaseous refrigerant is directly discharged into the compressor housing and then discharged into the system, and the refrigeration oil flows through the oil-gas separation component and returns to the oil pool in the compressor housing. Here, since the structure of the compressor 100 has been described in detail above, it will not be repeated here.

[0049] In addition, the present invention also provides a refrigeration cycle device including the rotary compressor 100. Since the compressor has been described in detail above, it will not be repeated here.

[0050] Preferably, the refrigeration cycle device is used in an air conditioner.

[0051] It should be understood that the rotary compressor provided by the present invention may be a single-cylinder compressor, a two-cylinder compressor or a three-cylinder compressor.

[0052] Preferably, in the rotary compressor of the present invention, no matter the compressor is a two-stage enthalpy-increasing compressor, a low back-pressure compressor or a high back-pressure compressor, a pressure drop component may be provided.

[0053] The rotary compressor and the refrigeration cycle device including the rotary compressor of the present invention have the following advantages and benefits compared with the prior art: (1) it can prevent the refrigeration oil from entering the air-conditioning system along with the high-temperature and high-pressure refrigerant during the exhaust process of the compressor and accumulating in the metal pipe to hinder the heat exchange of the refrigerant; (2) at the same time, it reduces the oil circulation rate, ensures the lubrication and sealing performance between the moving parts of the pump body, improves the reliability of the compressor, and ensures the refrigeration capacity of the refrigeration system.

[0054] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0055] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other described embodiments.

Claims

1. A rotor compressor, comprising a housing assembly, a motor assembly and a pump assembly, characterized in that: The pump assembly includes an oil-gas separation structure, which includes at least: A lower flange having a cavity disposed therein, wherein the lower flange comprises an oil-gas separation element disposed in the cavity and used for separating refrigeration oil from the refrigerant; A lower flange cover plate is provided with oil collecting holes and oil guiding holes which are interconnected to guide the separated refrigeration oil; and An oil collecting plate, which is provided with an oil collecting groove and an oil leakage hole, wherein the oil collecting groove is an inclined structure relative to a horizontal plane, the oil collecting groove is used to collect the refrigeration oil from the oil collecting hole and the oil guide hole, and the oil leakage hole is used to discharge the refrigeration oil into the compressor housing; Wherein, the oil-gas separation element comprises: a baffle and a grid, the baffle being used to impact the refrigeration oil in the refrigerant, and the grid being used to impact and absorb the refrigeration oil in the refrigerant; and The flow divider is used for guiding the mixed oil gas of the refrigerant and the refrigeration oil to flow through the baffle and the grid.

2. The rotary compressor according to claim 1, characterized in that: The oil-gas separation structure also includes: A pressure drop component is connected to the oil leakage hole of the oil collecting plate to reduce the pressure of the high-pressure refrigeration oil discharged from the oil leakage hole.

3. The rotary compressor according to claim 2, characterized in that: The pressure drop component is a capillary tube.

4. The rotary compressor according to claim 2, characterized in that: The pressure drop component is a pressure drop disk, and the pressure drop disk is provided with a pressure drop groove.

5. The rotary compressor according to any one of claims 1 to 4, characterized in that: The pump body assembly also includes a crankshaft, an upper flange, an upper roller, an upper sliding plate, an upper cylinder, a partition, a lower roller, a lower sliding plate and a lower cylinder.

6. The rotary compressor according to any one of claims 1 to 4, characterized in that: The rotary compressor is a single-cylinder compressor, a two-stage enthalpy-increasing compressor or a three-cylinder compressor.

7. The rotary compressor according to any one of claims 1 to 4, characterized in that: The rotary compressor is a compressor used in an air conditioner.

8. A refrigeration cycle device, characterized in that: It comprises a rotary compressor as claimed in any one of claims 1 to 7.

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