Pump components, compressors and air conditioning equipment

Abstract

The present invention discloses a pump body assembly, a compressor and an air conditioning device, which relate to the technical field of compressors, wherein the pump body assembly includes a first cylinder, a second cylinder and a partition, and the exhaust hole of the second cylinder is connected to the back pressure chamber through an air guide channel; the cross-sectional area of ​​the air guide channel is S1, the cross-sectional area of ​​the exhaust hole of the second cylinder is S2, and the ratio of S1 to S2 satisfies the relationship 0.3≤S1 / S2≤1.2; the length of the air guide channel is L, the diameter is D, and the ratio of L to D satisfies the relationship 1≤L / D≤5. In this scheme, by limiting the ratio (S1 / S2) of the cross-sectional area S1 of the air guide channel to the exhaust hole area S2 of the second cylinder, there is enough gas flow to the back pressure chamber, thereby maintaining the pressure of the back pressure chamber; the ratio (L / D) of the length L of the connecting hole to the diameter D reduces the pressure loss during the gas flow process, and can solve the problem of the sliding vane and the outer diameter of the piston roller being separated.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a pump body assembly, a compressor and air conditioning equipment. Background Art

[0002] In order to achieve the pressure ratio distribution of the compressor, two-stage or multi-stage compression technology can be used to improve volumetric efficiency. The compressor pump assembly includes low-pressure and high-pressure compression chambers, which are connected through an intermediate chamber; the high-pressure chamber inside the shell is located above the pump assembly.

[0003] At the beginning of the second cylinder startup, the spring force ensures that the piston and the vane cooperate to form an intake and exhaust process. As the internal pressure difference of the compressor is established, the movement of the vane relies on the back pressure chamber pressure, which is provided by the high pressure chamber inside the shell. However, the path from the high pressure chamber to the back pressure chamber of the vane is long, resulting in a pressure difference between the actual exhaust pressure and the back pressure chamber. Especially under low load conditions, the exhaust situation of the first cylinder remains unchanged, and the intake and exhaust pressure difference of the second cylinder decreases, resulting in a decrease in the vane back pressure. The spring force is not enough to make the vane cooperate with the piston, which causes the vane tip in the second cylinder to separate from the outer diameter of the roller, causing leakage in the compression chamber, resulting in a significant decrease in cooling capacity. Summary of the invention

[0004] The main purpose of the present invention is to provide a pump body assembly, a compressor and an air conditioning device, aiming to solve the problem that the sliding vane and the outer diameter of the piston roller in the second cylinder are easily separated under low load conditions.

[0005] To achieve the above object, the pump body assembly proposed by the present invention includes:

[0006] a first cylinder and a second cylinder; and

[0007] a partition plate disposed between the first cylinder and the second cylinder;

[0008] Among them, the second cylinder has a second compression chamber, a slide groove connected to the second compression chamber and provided with a second slide plate, and a back pressure chamber connected to the slide groove, and the exhaust hole of the second cylinder is connected to the back pressure chamber through an air guide channel; the cross-sectional area of ​​the air guide channel is S1, and the cross-sectional area of ​​the exhaust hole of the second cylinder is S2, and the ratio of S1 to S2 satisfies the relationship 0.3≤S1 / S2≤1.2; the length of the air guide channel is L, and the diameter is D, and the ratio of L to D satisfies the relationship 1≤L / D≤5.

[0009] In one embodiment, the air guide passage is provided in the second cylinder.

[0010] In one embodiment, the pump body assembly also includes an upper bearing connected to the second cylinder, the air inlet of the upper bearing is connected to the exhaust hole of the second cylinder, and the air guide channel is provided on the upper bearing and connects the air inlet of the upper bearing and the back pressure chamber.

[0011] In one embodiment, the pump body assembly also includes an upper bearing connected to the second cylinder, and an upper muffler connected to the upper bearing, an upper muffler chamber is formed between the upper muffler and the upper bearing, the exhaust port of the upper bearing is connected to the upper muffler chamber, and the air guide channel is provided on the upper bearing and connects the upper muffler chamber and the back pressure chamber.

[0012] In one embodiment, a first sliding vane is disposed in the first cylinder, and thicknesses of the first sliding vane and the second sliding vane are t1 and t2 respectively, and a ratio of t1 to t2 satisfies the relationship 1≤t2 / t1≤2.

[0013] In one embodiment, a first spring is disposed in the first cylinder; a second spring is disposed in the second cylinder; wherein an elastic coefficient K2 of the second spring is greater than or equal to an elastic coefficient K1 of the first spring.

[0014] In one embodiment, the spring wire diameter of the first spring is ф1; the spring wire diameter of the second spring is ф2; wherein ф2≥ф1; or, the compression amount of the first spring is T1; the compression amount of the second spring is T2; wherein T2≥T1; or, the second cylinder is further provided with a spring hole connected to the back pressure chamber, the second spring is installed in the back pressure chamber through the spring hole, and the spring hole is sealed by a plunger.

[0015] The present invention further proposes a compressor, comprising a housing, a pump body assembly all arranged on the housing, and a motor assembly connected to a crankshaft of the pump body assembly, wherein the pump body assembly is the above-mentioned pump body assembly.

[0016] In one embodiment, the compressor further comprises an enthalpy increasing component, the first cylinder and / or the partition plate are further provided with an enthalpy spray port, and the enthalpy increasing component is connected to the pump body component via the enthalpy spray port.

[0017] The present invention also provides an air conditioning device, comprising the compressor as described above.

[0018] The technical solution of the present invention is designed to connect the secondary exhaust chamber with the vane groove back pressure chamber, so that the high pressure gas generated when the second cylinder is exhausted can act on the back pressure chamber of the vane, and the ratio between the cross-sectional area S1 of the air guide channel and the exhaust hole area S2 of the second cylinder is controlled within the range of 0.3≤S1 / S2≤1.2, ensuring that the back pressure chamber can receive sufficient gas pressure while avoiding excessive pressure fluctuations. The ratio of the length L of the air guide channel to the diameter D is controlled within the range of 1≤L / D≤5, which helps to stabilize the flow of gas, reduce pressure loss, and ensure that the back pressure chamber can evenly and stably receive gas from the secondary exhaust chamber. By connecting the secondary exhaust chamber with the back pressure chamber of the vane groove, it is ensured that the back pressure chamber can receive the high pressure gas generated when the second cylinder is exhausted. This greatly improves the pressure stability of the back pressure chamber, especially under low load conditions, the stable back pressure helps to ensure the close fit between the vane and the piston roller, thereby reducing leakage in the compression chamber, and helping to improve the volumetric efficiency and overall performance of the compressor. Compared with conventional solutions, this solution reduces leakage and energy loss by optimizing the pressure control of the back pressure chamber, thereby improving the overall performance and efficiency of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 A schematic structural diagram of an embodiment of a compressor provided by the present invention;

[0021] Figure 2 for Figure 1 Schematic diagram of the local section at AA in the middle;

[0022] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0023] Figure 4 for Figure 1 A partial enlarged view of point B in the middle.

[0024] Description of Figure Numbers:

[0025] 100, first cylinder; 101, first slide; 200, second cylinder; 201, second slide; 210, second compression chamber; 220, slide groove; 230, back pressure chamber; 240, exhaust hole; 300, partition; 400, upper bearing; 500, upper muffler; 510, upper muffler chamber; 600, air guide channel; 700, spray enthalpy outlet.

[0026] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] The present invention proposes a pump body assembly, which mainly addresses the problem that under low-load conditions, the vane and the outer diameter of the piston roller in the second cylinder are easily separated, which will cause leakage in the compression chamber, thereby affecting the efficiency and performance of the compressor; by designing the secondary exhaust chamber and the back-pressure chamber of the vane groove to be connected, the high-pressure gas generated when the second cylinder is exhausted can act on the back-pressure chamber of the vane, thereby increasing the pressure of the back-pressure chamber.

[0031] The pump body assembly is used in rotary compressors. The pump body assembly refers to the overall structure of the compressor including the compression cylinder, partition, bearing, muffler and other components, which is used to achieve gas compression.

[0032] See also Figures 1 to 4 In one embodiment of the present invention, the pump assembly includes a first cylinder 100, a second cylinder 200 and a partition 300, and the partition 300 is disposed between the first cylinder 100 and the second cylinder 200. In order to facilitate the fixing of the crankshaft, an upper bearing 400 and a lower bearing are further disposed in the upper and lower directions of the first cylinder 100 and the second cylinder 200. In some schemes, an upper muffler 500 and a lower muffler are further disposed.

[0033] The second cylinder 200 has a second compression chamber 210, a slide groove 220 connected to the second compression chamber 210 and provided with a second slide plate 201, and a back pressure chamber 230 connected to the slide groove 220. The exhaust hole 240 of the second cylinder 200 is connected to the back pressure chamber 230 through an air guide channel 600; the cross-sectional area of ​​the air guide channel 600 is S1, and the cross-sectional area of ​​the exhaust hole 240 of the second cylinder 200 is S2, and the ratio of S1 to S2 satisfies the relationship 0.3≤S1 / S2≤1.2; the length of the air guide channel 600 is L and the diameter is D, and the ratio of L to D satisfies the relationship 1≤L / D≤5.

[0034] The ratio between the cross-sectional area S1 of the air guide channel 600 and the area S2 of the exhaust hole 240 of the second cylinder 200 is controlled within the range of 0.3≤S1 / S2≤1.2, ensuring that the back pressure chamber 230 can receive sufficient gas pressure while avoiding excessive pressure fluctuations. The ratio between the length L and the diameter D of the air guide channel 600 is controlled within the range of 1≤L / D≤5, which helps to stabilize the flow of gas, reduce pressure loss, and ensure that the back pressure chamber 230 can evenly and stably receive the gas from the secondary exhaust chamber. By connecting the secondary exhaust chamber with the back pressure chamber 230 of the chute 220, it is ensured that the back pressure chamber 230 can receive the high-pressure gas generated when the second cylinder 200 is exhausted. This greatly improves the pressure stability of the back pressure chamber 230, especially under low load conditions, the stable back pressure helps to ensure the close fit between the sliding vane and the piston roller, thereby reducing leakage in the compression chamber, and helping to improve the volumetric efficiency and overall performance of the compressor. Compared with the conventional solution, this solution reduces leakage and energy loss by optimizing the pressure control of the back pressure chamber 230, thereby improving the overall performance and efficiency of the compressor.

[0035] The ratio (S1 / S2) of the cross-sectional area S1 of the air guide channel 600 to the area S2 of the exhaust hole 240 of the second cylinder 200 determines the gas flow capacity from the secondary exhaust chamber to the back pressure chamber 230. By adjusting this ratio, the pressure level of the back pressure chamber 230 can be controlled to ensure that it is high enough to maintain close contact between the sliding vane and the piston roller.

[0036] The range of 0.3≤S1 / S2≤1.2 ensures that the back pressure chamber 230 can receive sufficient gas pressure without affecting the stable operation of the compressor due to excessive pressure fluctuations. If the ratio is too small, the back pressure may be insufficient; if the ratio is too large, the back pressure may be too high, increasing the energy consumption and wear of the compressor.

[0037] The ratio (L / D) of the length L of the connecting hole to the diameter D affects the flow characteristics and pressure loss of the gas when passing through the connecting hole. By adjusting this ratio, the flow path of the gas can be optimized, the pressure loss can be reduced, and it can be ensured that the back pressure chamber 230 can evenly and stably receive the gas from the secondary exhaust chamber.

[0038] The range of 1≤L / D≤5 ensures that the design of the connecting hole is neither too narrow (resulting in excessive pressure loss) nor too spacious (resulting in excessive back pressure fluctuation), which helps to maintain a stable pressure in the back pressure chamber 230, thereby maintaining a close fit between the sliding vane and the piston roller.

[0039] The meaning of the parameters are as follows:

[0040] S1 (the cross-sectional area of ​​the air guide passage 600 ) is the area of ​​the passage connecting the exhaust hole 240 of the second cylinder 200 and the back pressure chamber 230 , and determines the gas flow rate from the exhaust hole 240 to the back pressure chamber 230 .

[0041] S2 (the cross-sectional area of ​​the exhaust hole 240 of the second cylinder 200) is the outlet area of ​​the gas discharged from the second cylinder 200. It determines the rate at which the gas is discharged from the cylinder.

[0042] S1 / S2 (the ratio of the area of ​​the air guide channel 600 to the area of ​​the exhaust hole 240) controls the balance between the flow rate of gas from the exhaust hole 240 to the back pressure chamber 230 and the cylinder exhaust rate. By adjusting this ratio, it is possible to ensure that the back pressure chamber 230 obtains sufficient pressure while avoiding excessive pressure fluctuations.

[0043] L (the length of the air guide channel 600) is the length of the channel connecting the exhaust hole 240 and the back pressure chamber 230. It affects the resistance and pressure loss of gas flow.

[0044] D (diameter of the air-guiding channel 600 ) is the diameter of the channel, which together with the length determines the geometry and flow characteristics of the channel.

[0045] L / D (the ratio of the length to the diameter of the gas-guiding channel 600) affects the flow state of the gas in the channel, including the transition between laminar flow and turbulent flow, and the magnitude of the pressure loss. By adjusting this ratio, the gas flow path can be optimized and the pressure loss can be reduced.

[0046] Under low-load conditions, due to the decrease in exhaust pressure, the pressure in the back-pressure chamber 230 may also decrease, resulting in a weakened seal between the vane and the piston roller, or even detachment. This solution ensures that even at low exhaust pressure, there is sufficient gas flow to the back-pressure chamber 230 by increasing the cross-sectional area S1 of the air guide channel 600 (relative to the area S2 of the exhaust hole 240), thereby maintaining the pressure of the back-pressure chamber 230. At the same time, by optimizing the length L and diameter D of the air guide channel 600 and their ratio L / D, the pressure loss during the gas flow process is reduced, and the stable pressure of the back-pressure chamber 230 is further ensured, which can solve the problem of the vane detaching from the outer diameter of the piston roller, and improve the overall performance and efficiency of the compressor. In addition, the pressure loss during the gas flow process is reduced.

[0047] In one embodiment, the air guide channel 600 is disposed on the second cylinder 200 .

[0048] In one embodiment, the pump body assembly also includes an upper bearing 400 connected to the second cylinder 200, the air inlet of the upper bearing 400 is connected to the exhaust hole 240 of the second cylinder 200, and the air guide channel 600 is provided on the upper bearing 400 and connects the air inlet of the upper bearing 400 and the back pressure chamber 230.

[0049] In one embodiment, the pump body assembly also includes an upper bearing 400 connected to the second cylinder 200, and an upper muffler 500 connected to the upper bearing 400, an upper muffler chamber 510 is formed between the upper muffler 500 and the upper bearing 400, the exhaust port of the upper bearing 400 is connected to the upper muffler chamber 510, and the air guide channel 600 is provided on the upper bearing 400, and is connected to the upper muffler chamber 510 and the back pressure chamber 230.

[0050] In order to better solve the problem of easy separation between the sliding plate and the outer diameter of the piston roller in the second cylinder 200 under low load conditions, a first sliding plate 101 is provided in the first cylinder 100. The thicknesses of the first sliding plate 101 and the second sliding plate 201 are t1 and t2 respectively, and the ratio of t1 to t2 satisfies the relationship 1≤t2 / t1≤2.

[0051] The thickness of the sliding plate directly affects the contact area and contact pressure between the sliding plate and the outer diameter of the piston roller. A thicker sliding plate can provide a larger contact area and a stronger contact pressure, thereby increasing the friction between the sliding plate and the outer diameter of the piston roller and reducing the possibility of separation. By adjusting the thickness ratio of the first sliding plate 101 and the second sliding plate 201 to meet the relationship of 1≤t2 / t1≤2, the problem of the sliding plate in the second cylinder 200 being easily separated from the outer diameter of the piston roller under low load conditions can be solved to a certain extent.

[0052] Furthermore, on the basis of increasing the pressure of the back pressure chamber 230, increasing the area of ​​the sliding plate can increase the contact pressure between the sliding plate and the piston roller; in addition, optimizing the spring can also make the sliding plate better contact with the piston roller to ensure the sealing effect. A first spring is provided in the first cylinder 100; a second spring is provided in the second cylinder 200; wherein the elastic coefficient K2 of the second spring ≥ the elastic coefficient K1 of the first spring. The elastic coefficient of the spring determines the amount of deformation it produces when subjected to force. The larger the elastic coefficient, the smaller the deformation of the spring under the same force, and vice versa. When the elastic coefficient K2 of the second spring is greater than or equal to the elastic coefficient K1 of the first spring, the deformation of the second spring under the same force will be smaller, thereby being able to provide a more stable preload.

[0053] In one embodiment, the spring wire diameter of the first spring is ф1; the spring wire diameter of the second spring is ф2; wherein ф2≥ф1. An increase in the spring wire diameter generally means that the stiffness and load-bearing capacity of the spring will also increase accordingly. Therefore, when the wire diameter ф2 of the second spring is greater than or equal to the wire diameter ф1 of the first spring, the second spring can provide a more stable preload and better load-bearing capacity. Under low-load conditions, a larger wire diameter helps the spring maintain its shape and preload, thereby ensuring close contact and good sealing between the slide and the piston roller.

[0054] In one embodiment, the compression amount of the first spring is T1; the compression amount of the second spring is T2; wherein T2 ≥ T1. The compression amount of the spring determines the degree of deformation when subjected to force. A larger compression amount means that the spring can produce a greater deformation when subjected to force, thereby providing a greater preload and restoring force. When the compression amount T2 of the second spring is greater than or equal to the compression amount T1 of the first spring, the second spring can provide a greater preload under low-load conditions to ensure close contact between the sliding plate and the piston roller.

[0055] In one embodiment, the second cylinder 200 is further provided with a spring hole communicating with the back pressure chamber 230 , the second spring is installed in the back pressure chamber 230 through the spring hole, and the spring hole is sealed by a plunger.

[0056] Reference Figure 1The present invention also proposes a compressor, which includes a pump assembly. The specific structure of the pump assembly refers to the above embodiment. Since the compressor adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. The compressor also includes a housing, a pump assembly arranged in the housing, and a motor assembly connected to the crankshaft of the pump assembly.

[0057] Furthermore, the compressor further comprises an enthalpy increasing component, the first cylinder 100 and / or the partition plate 300 are further provided with an enthalpy spray port 700 , and the enthalpy increasing component is connected to the pump body component via the enthalpy spray port 700 .

[0058] In one embodiment, the enthalpy spray port 700 is disposed on the first-stage cylinder body; in one embodiment, the enthalpy spray port 700 is disposed on the partition plate 300; the enthalpy increasing component generally includes a refrigerant spray device, a control valve and other components, which are used to spray the refrigerant into the compression chamber of the pump body assembly, thereby achieving the enthalpy increasing effect. During the compression process, the pressure and temperature of the gas in the compression chamber can be increased by replenishing gas into the compression chamber through the enthalpy spray port 700, thereby improving the heating efficiency of the compressor.

[0059] The present invention also provides an air conditioning device, which includes the above compressor. The air conditioning device can be a household air conditioner, a commercial air conditioner, a car air conditioner, etc. It provides cooling and heating services for families to meet people's demand for comfortable indoor temperature.

[0060] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A pump assembly, characterized in that: include: a first cylinder and a second cylinder; and A partition is provided between the first cylinder and the second cylinder; wherein, The second cylinder has a second compression chamber, a slide groove connected to the second compression chamber and provided with a second slide plate, and a back pressure chamber connected to the slide groove. The exhaust hole of the second cylinder is connected to the back pressure chamber through an air guide channel; the cross-sectional area of ​​the air guide channel is S1, and the cross-sectional area of ​​the exhaust hole of the second cylinder is S2, and the ratio of S1 to S2 satisfies the relationship 0.3≤S1 / S2≤1.2; the length of the air guide channel is L and the diameter is D, and the ratio of L to D satisfies the relationship 1≤L / D≤5.

2. The pump assembly according to claim 1, characterized in that: The air guide passage is arranged in the second cylinder.

3. The pump assembly according to claim 1, characterized in that: The pump body assembly also includes an upper bearing connected to the second cylinder, the air inlet of the upper bearing is connected to the exhaust hole of the second cylinder, and the air guide channel is arranged on the upper bearing and connects the air inlet of the upper bearing and the back pressure chamber.

4. The pump assembly according to claim 1, characterized in that: The pump body assembly also includes an upper bearing connected to the second cylinder, and an upper muffler connected to the upper bearing, an upper muffler chamber is formed between the upper muffler and the upper bearing, an exhaust port of the upper bearing is connected to the upper muffler chamber, and the air guide channel is provided on the upper bearing and connects the upper muffler chamber and the back pressure chamber.

5. The pump assembly according to claim 1, characterized in that: A first sliding vane is disposed in the first cylinder. The thicknesses of the first sliding vane and the second sliding vane are t1 and t2 respectively. The ratio of t1 to t2 satisfies the relationship 1≤t2 / t1≤2.

6. The pump assembly according to claim 1, characterized in that: The first cylinder is provided with a first spring; the second cylinder is provided with a second spring; The elastic coefficient K2 of the second spring is greater than or equal to the elastic coefficient K1 of the first spring.

7. The pump assembly according to claim 6, characterized in that: The spring wire diameter of the first spring is ф1; the spring wire diameter of the second spring is ф2; wherein ф2≥ф1; or, the compression amount of the first spring is T1; the compression amount of the second spring is T2; wherein T2≥T1; or, the second cylinder is further provided with a spring hole connected to the back pressure chamber, the second spring is installed in the back pressure chamber through the spring hole, and the spring hole is sealed by a plunger.

8. A compressor, characterized in that: It comprises a housing, a pump body assembly arranged on the housing, and a motor assembly connected to a crankshaft of the pump body assembly, wherein the pump body assembly is the pump body assembly according to any one of claims 1 to 7.

9. The compressor according to claim 8, characterized in that The compressor further comprises an enthalpy increasing component, the first cylinder and / or the partition plate are further provided with an enthalpy spray port, and the enthalpy increasing component is connected to the pump body component via the enthalpy spray port.

10. An air conditioning device, characterized in that: Comprising a compressor as claimed in claim 8 or 9.

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