Compressor and its aeration-enhancing enthalpy structure

Abstract

The present invention relates to the field of compressor technology, and more particularly to a compressor supplemental gas enhancement enthalpy structure and a compressor including the supplemental gas enhancement enthalpy structure. The supplemental gas enhancement enthalpy structure includes a main passage connected to the intake port of a cylinder and transporting main gas into the internal space of the cylinder, a supplemental gas port passage with one end connected to the internal space of the cylinder, and a gas replenishment passage connected to the other end of the supplemental gas port passage and transporting replenishment gas into the internal space of the cylinder via the supplemental gas port passage, wherein the minimum flow area of ​​the gas replenishment passage is S1, the minimum flow area of ​​the main passage is S2, and S1 / S2 is 1% or more and 18% or less. By optimizing the minimum flow area of ​​the gas replenishment passage and the main passage, flow rate control of the gas replenishment passage and the main passage can be achieved, effectively demonstrating the functional and performance advantages of the replenishment gas compressor, further improving the function and energy efficiency of the compressor, and ensuring the reliability of the compressor.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and particularly to a gas supplement and enthalpy increase structure of a compressor and a compressor including the gas supplement and enthalpy increase structure.

Background Art

[0002] When the external environmental temperature is low, the operating pressure of the compressor increases, and the functions and energy efficiency of the compressor decrease significantly. In order to improve the functions and energy efficiency of the compressor, usually, supplementary gas is injected, that is, the refrigerant vapor after condensation and throttling is introduced into the internal space of the cylinder, so as to increase the refrigerant flow rate and intake temperature, and improve the functions and energy efficiency of the compressor. At present, gas-supplemented compressors mainly perform gas supplementation to the internal space of the cylinder by the following two gas supplementation methods. One is a gas supplementation method that controls the opening and closing of the supplementary gas flow path by using the movement locus of the piston, and the other is a gas supplementation method that uses a check valve (such as a ball valve, a taper valve, a reed valve, a pressure valve, etc.) to control the opening and closing of the supplementary gas flow path.

[0003] The above gas supplementation methods can achieve gas supplementation to the compressor, but there are still the following problems. (1) The clearance volume increases. Due to the existence of the gas supplementation structure, the clearance volume of the compressor increases, leading to a decrease in the functions and energy efficiency of the compressor. During non-injection operation, the decrease in the functions and energy efficiency of the compressor is particularly significant. (2) When using check valves such as ball valves and taper valves, the supplementary gas flow path becomes relatively complex, the flow path pressure loss increases, and when the check valve opens and closes frequently during compressor operation, it collides with the cylinder wall, so there is a risk in the use reliability. (3) The improvement of the gas supplementation function and gas supplementation effect is not significant, and the distribution of the gas supplementation amount and the cylinder intake air amount is unreasonable, so the functions and energy efficiency of the gas-supplemented compressor cannot be normally exerted, and when liquid injection occurs during gas supplementation, it has an adverse effect on the reliability of the compressor.

Summary of the Invention

Problems to be Solved by the Invention

[0004] In view of the shortcomings of the prior art described above, the technical problem that the present invention aims to solve is to provide a compressor augmentation enthalpy structure that contributes to improving the function and energy efficiency of the compressor. [Means for solving the problem]

[0005] To solve the above technical problems, the present invention employs the following technical solutions.

[0006] The present invention provides an enthalpy structure for boosting the gas supply of a compressor. The structure includes a main passage connected to the intake port of a cylinder and transporting the main gas into the internal space of the cylinder, an auxiliary gas port passage with one end connected to the internal space of the cylinder, and a gas replenishment passage connected to the other end of the auxiliary gas port passage and transporting replenishment gas into the internal space of the cylinder via the auxiliary gas port passage, wherein the minimum flow area of ​​the gas replenishment passage is S1, the minimum flow area of ​​the main passage is S2, and S1 / S2 is 1% or more and 18% or less.

[0007] Preferably, S1 / S2 is between 8% and 10%.

[0008] Preferably, S1 / S2 is between 4% and 6%.

[0009] Preferably, the minimum flow area of ​​the air intake passage is S3, and the ratio of S3 / S1 is 1% or more and 10% or less.

[0010] Preferably, S3 / S1 is between 4% and 9%.

[0011] Preferably, S3 / S1 is between 5% and 7%.

[0012] Preferably, the gas replenishment passage is provided with a check valve that opens and closes the gas replenishment passage.

[0013] Preferably, the check valve is a pressure valve.

[0014] Preferably, the gas replenishment passage is provided in the intermediate plate, cylinder, or bearing of the compressor.

[0015] The present invention further provides a compressor that includes the above-described compressor's augmented enthalpy structure. [Effects of the Invention]

[0016] Compared to the prior art, the present invention has the following beneficial effects.

[0017] The enthalpy structure for the compressor according to the present invention optimizes the ratio of the minimum flow area S1 of the gas replenishment passage to the minimum flow area S2 of the main passage, that is, by optimizing the minimum flow area S1 of the gas replenishment passage and the minimum flow area S2 of the main passage and satisfying the optimized S1 / S2 ratio range, thereby achieving flow rate control of the gas replenishment passage and the main passage, effectively demonstrating the functional and performance advantages of the gas replenishment type compressor, further improving the function and energy efficiency of the compressor, and ensuring the reliability of the compressor. [Brief explanation of the drawing]

[0018] [Figure 1] This is a schematic diagram of the enthalpy structure for a compressor according to an embodiment of the present invention. [Figure 2] This is a schematic diagram showing the connection between the gas replenishment passage and the gas inlet passage in the enthalpy structure for gas replenishment of a compressor according to an embodiment of the present invention. [Figure 3] This is a schematic diagram showing that in the enthalpy structure of a compressor according to an embodiment of the present invention, the compressor COP changes with a change in the S1 / S2 ratio. [Figure 4] This is a schematic diagram showing that the compressor refrigeration function changes with changes in the S1 / S2 ratio in the compressor augmentation enthalpy structure according to an embodiment of the present invention. [Figure 5] This is a schematic diagram showing that in the compressor enthalpy structure with added air supply according to an embodiment of the present invention, the compressor COP changes with a change in the S3 / S1 ratio. [Figure 6]In the supplementary air super-entropy structure of the compressor according to the embodiment of the present invention, the refrigeration function of the compressor is a schematic diagram showing that it changes with the change of the S3 / S1 ratio. [Figure 7] In the supplementary air super-entropy structure of the compressor according to the embodiment of the present invention, it is a schematic cross-sectional view when the gas replenishment passage is provided on the intermediate plate. [Figure 8] In the supplementary air super-entropy structure of the compressor according to the embodiment of the present invention, it is a schematic diagram showing that a pressure valve is adopted as the check valve and gas replenishment is performed in a two-valve form. [Figure 9] In the supplementary air super-entropy structure of the compressor according to the embodiment of the present invention, it is a schematic diagram showing that a pressure valve is adopted as the check valve and gas replenishment is performed in a one-valve form.

Embodiments for Carrying out the Invention

[0019] Hereinafter, the specific embodiments of the present invention will be described in more detail with reference to the drawings. It should be noted that these embodiments are only for explaining the present invention and do not limit the present invention.

[0020] In the description of the present invention, as points to be explained, the directions or positional relationships indicated by terms such as "center", "vertical", "horizontal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "ceiling", "bottom", "inner", "outer", etc. are the directions or positional relationships based on the illustration, and are only for the convenience of description and simplification of the description of the present invention, and do not explicitly or implicitly imply that the target device or member must have a specific direction and be configured and operated in a specific direction. Therefore, it should not be construed as limiting the present invention. Also, the terms "first", "second" are only for the convenience of description and should not be construed as explicitly or implicitly indicating relative importance.

[0021] As a point to be noted, in the description of the present invention, unless otherwise clearly defined and limited separately, terms such as "attach", "be continuous with", and "connect" should be interpreted in a broad sense. For example, it may be a fixed connection, a removable connection, or an integral connection. Also, it may be a mechanical connection or an electrical connection. Moreover, it may be a direct continuity, an indirect continuity through an intermediate medium, or a communication within two members. A person skilled in the art can interpret the specific meaning of the above terms in the present invention according to the specific situation.

[0022] Also, unless otherwise explained, in the description of the present invention, "a plurality" means two or more.

[0023] Figures 1 to 9 show an embodiment of the补气增压 enthalpy structure of the compressor provided by the present invention.

[0024] Referring to Figures 1 and 2, the补气增压 enthalpy structure of the compressor according to this embodiment (that is, a structure that increases enthalpy by gas replenishment) includes a main passage (not shown), a补气 port passage 1, and a gas replenishment passage 2.

[0025] The main passage is connected to and communicates with the intake port of the compressor cylinder, and the main gas is conveyed from the main passage to the internal space of the cylinder. The main gas is the refrigerant after condensation and throttling, which is sent to the internal space of the cylinder and compressed by the compression structure in the cylinder. Usually, the main gas sent to the internal space of the compressor cylinder and compressed is supplied from the evaporator, and an accumulator is provided between the evaporator and the cylinder, which is used to collect the liquid refrigerant in the refrigerant flowing out of the evaporator. The main passage in this embodiment is the main gas flow path extending from the inner pipe of the accumulator to the intake port of the cylinder, which is used to convey the main gas entering the accumulator from the evaporator to the internal space of the cylinder. The main gas directly enters the internal space of the cylinder from the intake port of the cylinder and is compressed. The main passage has a minimum flow area S2, and the minimum flow area of the main passage is the minimum cross-sectional area of the main passage. It should be noted that the term "补气增压 enthalpy" seems to be a specific technical term in Chinese for this compressor structure, and there may not be a very accurate and common English equivalent. Here, a literal translation is provided as much as possible to maintain the integrity of the text. If there is a more accurate English term for this concept in the relevant technical field, it can be adjusted accordingly.

[0026] The gas supply passage 1 is provided in the wall of the internal space of the cylinder, and one end of the gas supply passage 1 is connected to and communicates with the internal space of the cylinder. The gas replenishment passage 2 is connected to and communicates with the other end of the gas supply passage 1, and the gas replenishment passage 2 transports replenishment gas into the internal space of the cylinder via the gas supply passage 1. That is, replenishment gas is transported from the gas replenishment passage 2 to the internal space of the cylinder, and the end of the gas replenishment passage 2 is connected to the gas supply passage 1. The replenishment gas transported to the gas supply passage 2 enters the gas supply passage 1 and is injected into the internal space of the cylinder via the gas supply passage 1. The replenishment gas is similarly condensed and throttled refrigerant. In this embodiment, the gas replenishment passage 2 is a replenishment gas flow path that extends from the supply source of replenishment gas refrigerant to the gas supply passage 1, and the gas supply passage 1 refers to an injection flow path that extends from the end of the gas supply passage 2 to the internal space of the cylinder. The gas replenishment passage 2 is an openable and closable flow path, and can be opened as needed to transport replenishment gas into the internal space of the cylinder. The gas replenishment passage 2 has a minimum flow area S1, and the minimum flow area of ​​the gas replenishment passage 2 is equal to the minimum cross-sectional area of ​​the gas replenishment passage 2. The air supply passage 1 has a minimum flow area S3, and the minimum flow area of ​​the air supply passage 1 is equal to the minimum cross-sectional area of ​​the air supply passage 1.

[0027] The refrigerant flow rates in the main passage, the auxiliary air passage 1, and the gas replenishment passage 2 are correlated with the flow area of ​​each passage, particularly the minimum flow area. By adjusting the ratio of the minimum flow area S1 of the gas replenishment passage 2, the minimum flow area S2 of the main passage, and the minimum flow area S3 of the auxiliary air passage 1, the function and energy efficiency of the compressor during gas replenishment can be controlled to an optimal range.

[0028] In this embodiment, the function and energy efficiency of the compressor can be effectively improved by setting the ratio of the minimum flow area S1 of the gas replenishment passage 2 to the minimum flow area S2 of the main passage within the range of 1 to 18%, i.e., 1% ≤ S1 / S2 ≤ 18%. Preferably, the function and energy efficiency of the compressor can be maximized by setting the ratio of the minimum flow area S1 of the gas replenishment passage 2 to the minimum flow area S2 of the main passage within the range of 8% to 10%, i.e., 8% ≤ S1 / S2 ≤ 10%. Preferably, the energy efficiency of the compressor is optimized by setting the ratio of the minimum flow area S1 of the gas replenishment passage 2 to the minimum flow area S2 of the main passage within the range of 4 to 6%, i.e., 4 ≤ S1 / S2 ≤ 6%.

[0029] Figure 3 shows the change in compressor COP (coefficient of refrigeration performance) with respect to the S1 / S2 ratio. Figure 4 shows the change in compressor refrigeration function with respect to the S1 / S2 ratio.

[0030] The enthalpy structure of the compressor in this embodiment optimizes the ratio of the minimum flow area S1 of the gas replenishment passage 2 to the minimum flow area S2 of the main passage, that is, by optimizing the minimum flow area S1 of the gas replenishment passage 2 to the minimum flow area S2 of the main passage and satisfying the optimized S1 / S2 ratio range, thereby achieving flow rate control of the gas replenishment passage 2 and the main passage, effectively demonstrating the functional and performance advantages of the gas replenishment type compressor, further improving the function and energy efficiency of the compressor, and ensuring the reliability of the compressor.

[0031] After the gas replenishment passage 2 opens, it communicates with the auxiliary air port passage 1, and the replenishment gas refrigerant flowing into the gas replenishment passage 2 flows into the internal space of the cylinder via the auxiliary air port passage 1 and is compressed. Setting the flow area of ​​the auxiliary air port passage 1 too small may cause pressure loss and liquid entrainment during gas replenishment due to throttling of the replenishment gas refrigerant. Setting the flow area of ​​the auxiliary air port passage 1 too large may not only increase the gap volume of the compressor but also cause short-circuiting due to communication between the intake chamber and the compression chamber of the compressor. Therefore, an appropriate flow area for the auxiliary air port passage 1 is advantageous for achieving the energy efficiency of the compressor.

[0032] In this embodiment, the compressor's enthalpy augmentation structure further sets the ratio of the minimum flow area S3 of the augmentation passage 1 to the minimum flow area S1 of the gas replenishment passage 2 to within the range of 1% to 10%, i.e., 1% ≤ S3 / S1 ≤ 10%. This further optimizes the minimum flow area S3 of the augmentation passage 1, effectively achieving the objectives of reducing refrigerant pressure loss, shrinking gap volume, and improving compressor performance. Preferably, setting the ratio of the minimum flow area S3 of the augmentation passage 1 to the minimum flow area S1 of the gas replenishment passage 2 to within the range of 4% to 9%, i.e., 4% ≤ S3 / S1 ≤ 9%, maximizes the compressor's function and energy efficiency. More preferably, setting the ratio of the minimum flow area S3 of the augmentation passage 1 to the minimum flow area S1 of the gas replenishment passage 2 to within the range of 5% to 7%, i.e., 5% ≤ S3 / S1 ≤ 7%, optimizes the compressor's function and energy efficiency.

[0033] Figure 5 shows the change in compressor COP (coefficient of refrigeration performance) with respect to the S3 / S1 ratio. Figure 6 shows the change in compressor refrigeration function with respect to the S3 / S1 ratio.

[0034] In the compressor's enthalpy augmentation structure of this embodiment, the gas replenishment passage 2 is provided on a structural member 4. The structural member 4 is a component or structure in which a passage communicating with the internal space of the cylinder can be installed in the compressor, and includes, but is not limited to, an intermediate plate, cylinder, or bearing of the compressor. For example, Figure 7 shows a schematic cross-sectional view when the gas replenishment passage 2 is provided on an intermediate plate (i.e., when the structural member 4 is an intermediate plate).

[0035] In the compressor's augmented enthalpy structure of this embodiment, a check valve 3 for opening and closing the gas replenishment passage 2 is preferably provided in the gas replenishment passage 2. Preferably, the check valve 3 is a pressure valve. This simplifies the structure of the gas replenishment passage 2, reduces pressure loss in the gas replenishment passage 2, and ensures reliability. Of course, the check valve 3 for opening and closing the gas replenishment passage 2 is not limited to a pressure valve, and other types of check valves such as ball valves, reed valves, or tapered valves can also be used. The gas replenishment passage 2 can replenish the internal space of the two-stage cylinder of the compressor in a two-valve, two-replenishment manner using two check valves, or replenish the internal space of the first-stage cylinder of the compressor in a one-valve, one-replenishment manner using one check valve, or replenish the internal space of the two-stage cylinder of the compressor in a one-valve, two-replenishment manner using one check valve.

[0036] In an example where the pressure valve is a check valve 3 and the compressor's intermediate plate is a structural member 4, Figures 8 and 9 show a two-valve configuration and a one-valve configuration, respectively. The valve piece 31 of the pressure valve is provided at the end of the gas replenishment passage 2, and a valve piece groove 41 is provided on the structural member 4 where the gas replenishment passage 2 is located, with the valve piece 31 of the pressure valve mounted in the valve piece groove 41 and fixed by a valve piece shielding plate 32 and rivets 33. Opening and closing of the gas replenishment passage 2 is achieved by rotating the valve piece 31 by external force to separate it from the end of the gas replenishment passage 2 or by shielding the end of the gas replenishment passage 2.

[0037] Based on the above-described enthalpy augmentation structure of the compressor, embodiments of the present invention further provide a compressor. The compressor of this embodiment includes the enthalpy augmentation structure of the compressor described in this embodiment.

[0038] The above has merely described preferred embodiments of the present invention. Those skilled in the art can make various improvements and substitutions without departing from the technical principles of the present invention, and these improvements and substitutions are also included within the scope of protection of the present invention. [Explanation of Symbols]

[0039] 1. Air intake passage 2. Gas replenishment passage 3. Check valve 31 Valve piece 32 Valve piece shielding plate 33 rivets 4 Structural members 41 Valve groove

Claims

1. A main passage connected to the intake port of the cylinder, which transports the main gas into the internal space of the cylinder, An auxiliary air port passage, one end of which is connected to the internal space of the cylinder, Includes a gas replenishment passage connected to the other end of the aforementioned air supply passage, which transports replenishment gas into the internal space of the cylinder via the aforementioned air supply passage, The compressor's gas-supplying enthalpy structure is characterized in that the minimum flow area of ​​the gas replenishment passage is S1, the minimum flow area of ​​the main passage is S2, and S1 / S2 is 1% or more and 18% or less.

2. The compressor's supplemental air-enhancing enthalpy structure according to claim 1, characterized in that S1 / S2 is 8% or more and 10% or less.

3. The compressor's supplemental air-enhancing enthalpy structure according to claim 1, characterized in that S1 / S2 is 4% or more and 6% or less.

4. The compressor's air-supplying enthalpy structure according to any one of claims 1 to 3, characterized in that the minimum flow area of ​​the air supply passage is S3, and S3 / S1 is 1% or more and 10% or less.

5. The compressor supplemental air-enhancing enthalpy structure according to claim 4, characterized in that S3 / S1 is 4% or more and 9% or less.

6. The compressor supplemental air-enhancing enthalpy structure according to claim 5, characterized in that S3 / S1 is 5% or more and 7% or less.

7. The compressor gas supply enthalpy structure according to claim 1, characterized in that the gas supply passage is provided with a check valve for opening and closing the gas supply passage.

8. The compressor air supplementation enthalpy structure according to claim 7, characterized in that the check valve is a pressure valve.

9. The compressor gas supply passage is provided in the cylinder or bearing of the compressor, characterized in that the compressor gas supply enthalpy structure according to claim 1.

10. The main passage is a main gas flow path extending from the inner tube of the accumulator to the intake port, and is used to transport the main gas entering the accumulator from the evaporator into the internal space of the cylinder, characterized in that it is an auxiliary gas augmentation enthalpy structure for a compressor according to claim 1.

11. The compressor air supply enthalpy structure according to claim 7, characterized in that the check valve is a ball valve, a reed valve, or a tapered valve.

12. In the case where the cylinder is a two-stage cylinder, the gas replenishment passage is characterized in that it replenishes gas to the internal space of the two-stage cylinder in a two-valve, two-replenishment manner using two check valves, or replenishes gas to the internal space of the two-stage cylinder in a one-valve, two-replenishment manner using one check valve, as described in claim 7.

13. The compressor gas supplementation enthalpy structure according to claim 7, characterized in that, when the cylinder is a single-stage cylinder, the gas replenishment passage replenishes gas into the internal space of the single-stage cylinder in a one-valve-one-replenishment manner by one of the check valves.

14. The compressor gas supplementation enthalpy structure according to claim 8, characterized in that the gas replenishment passage is provided in the intermediate plate of the compressor.

15. The compressor gas supplementation enthalpy structure according to claim 14, characterized in that a valve piece groove is provided in the intermediate plate at the location of the end of the gas supplementation passage, the valve piece of the pressure valve is mounted in the valve piece groove, and the gas supplementation passage is opened and closed by rotating the valve piece by an external force to separate it from the end of the gas supplementation passage or by shielding the end of the gas supplementation passage.

16. The compressor air supplementation enthalpy structure according to claim 15, characterized in that the valve piece is fixed in the valve piece groove by a valve piece shielding plate and a rivet.

17. A compressor characterized by including an air-supplementing enthalpy structure according to any one of claims 1 to 16.

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