Pump body assembly, two-stage enthalpy-increasing compressor and air conditioner

Abstract

This invention provides a pump assembly, a two-stage enthalpy-increasing compressor, and an air conditioner. The pump assembly includes a low-pressure stage compression section, a high-pressure stage compression section, and an intermediate-pressure chamber. The intermediate-pressure chamber has a first gas injection enthalpy-increasing port and a second gas injection enthalpy-increasing port, both of which are connected to the enthalpy-increasing component of the two-stage enthalpy-increasing compressor via enthalpy-increasing pipes. The intermediate-pressure chamber contains a pressure regulating valve plate, which divides the intermediate-pressure chamber into a gas injection chamber and a pressure equalization chamber. The valve plate can move towards the side with the lower pressure when a pressure difference exists between the gas injection chamber and the pressure equalization chamber. The first gas injection enthalpy-increasing port is connected to the gas injection chamber, and the second gas injection enthalpy-increasing port is connected to the pressure equalization chamber. The intermediate-pressure chamber is connected to the high-pressure stage compression section via the gas injection chamber. This invention improves the pressure fluctuation in the intermediate-pressure chamber of the two-stage enthalpy-increasing compressor, thereby reducing noise and vibration, improving the enthalpy-increasing performance of the compressor, and enhancing the user experience.

Description

Technical Field

[0001] This invention belongs to the field of compressor design technology, specifically relating to a pump assembly, a two-stage enthalpy-increasing compressor, and an air conditioner. Background Technology

[0002] Two-stage enthalpy-increasing compressors effectively solve common problems in ordinary household air conditioners and heat pump water heaters, such as poor heating performance at low temperatures and slow cooling at high temperatures. After the refrigerant enters the two-stage enthalpy-increasing compressor, it first undergoes primary compression in the low-pressure stage cylinder and is discharged into the intermediate-pressure chamber. Then, it enters the high-pressure stage cylinder from the intermediate-pressure chamber for secondary compression and is discharged into the casing. This effectively distributes the pressure ratio. Under heavy load and high pressure ratio conditions, the two-stage enthalpy-increasing compressor exhibits excellent reliability. The high and low pressure stages of the two-stage enthalpy-increasing compressor are always in operation. If the intermediate-pressure refrigerant discharged from the low-pressure stage cannot all enter the high-pressure stage and remains in the intermediate-pressure chamber, pressure fluctuations occur, resulting in excessive noise and vibration, performance degradation, and other problems that severely impact the user experience. Summary of the Invention

[0003] Therefore, the present invention provides a pump assembly, a two-stage enthalpy-increasing compressor, and an air conditioner, which can solve the technical problem in the prior art that the medium-pressure refrigerant in the medium-pressure chamber of the two-stage enthalpy-increasing compressor cannot fully enter the high-pressure stage compression chamber and remains in the medium-pressure chamber, resulting in large pressure fluctuations of the refrigerant in the medium-pressure chamber during compressor operation, which in turn causes large noise and vibration of the compressor and a decrease in performance.

[0004] To address the aforementioned problems, this invention provides a pump assembly for use in a two-stage enthalpy-increasing compressor. The assembly includes a low-pressure stage compression section, a high-pressure stage compression section, and an intermediate-pressure chamber connecting the low-pressure stage compression section and the high-pressure stage compression section. The intermediate-pressure chamber has a first gas injection enthalpy-increasing port and a second gas injection enthalpy-increasing port. Both the first and second gas injection enthalpy-increasing ports are connected to the enthalpy-increasing component of the two-stage enthalpy-increasing compressor via enthalpy-increasing pipes. The intermediate-pressure chamber contains a pressure regulating valve plate, which divides the intermediate-pressure chamber into a gas injection chamber and a pressure equalization chamber. The valve plate can move towards the side with the lower pressure when a pressure difference exists between the gas injection chamber and the pressure equalization chamber. The first gas injection enthalpy-increasing port is connected to the gas injection chamber, the second gas injection enthalpy-increasing port is connected to the pressure equalization chamber, and the intermediate-pressure chamber is connected to the high-pressure stage compression section via the gas injection chamber.

[0005] In some implementations...

[0006] The low-pressure stage compression section is stacked with the high-pressure stage compression section. The pump body assembly also includes a partition assembly for separating the low-pressure stage compression section and the high-pressure stage compression section. The partition assembly includes an upper partition and a lower partition stacked vertically, with a first cavity formed between the upper partition and the lower partition. The low-pressure stage compression section includes a low-pressure stage cylinder, and the high-pressure stage compression section includes a high-pressure stage cylinder and a lower flange connected to the end face of the high-pressure stage cylinder away from the lower partition. The first gas injection enthalpy-increasing port is constructed on the low-pressure stage cylinder and communicates with the upper opening of the first cavity. The high-pressure stage cylinder is constructed with a guide through hole communicating with the lower opening of the first cavity. The second gas injection enthalpy-increasing port is constructed on the lower flange and communicates with the lower opening of the guide through hole. The first cavity and the guide through hole together form the intermediate-pressure cavity, and the pressure regulating valve plate is located within the guide through hole.

[0007] In some implementations...

[0008] The inner wall of the guide hole and the outer edge of the pressure regulating valve plate have an anti-tipping guide structure.

[0009] In some implementations...

[0010] The anti-rollover guide structure includes multiple protrusions and grooves that correspond to each protrusion. Each protrusion is spaced apart circumferentially along the guide through hole and extends axially along the guide through hole. The protrusions are located on the pressure regulating valve plate, and the grooves are located on the inner wall of the hole.

[0011] In some implementations...

[0012] The first cavity is an annular cavity. The primary exhaust port of the low-pressure stage compression section and the secondary intake port of the high-pressure stage compression section are both connected to the annular cavity. The guide hole, the first gas replenishment and enthalpy increase port, and the second gas replenishment and enthalpy increase port are located on the first side of the pump body assembly. The primary exhaust port and the secondary intake port are located on the second side of the pump body assembly. The first side and the second side are opposite sides of the pump body assembly.

[0013] In some implementations...

[0014] The volume of the first cavity is Va, and the volume of the guide hole is Vb, where Va / 5 ≤ Vb ≤ Va / 4.

[0015] The present invention also provides a two-stage enthalpy-increasing compressor, including a housing, wherein the pump assembly described above is disposed within the housing.

[0016] In some embodiments, the two-stage enthalpy-increasing compressor further includes the enthalpy-increasing component, and the enthalpy-increasing tube includes a first inner tube and a second inner tube, the first inner tube being connected to the first gas replenishment enthalpy-increasing port, and the second inner tube being connected to the second gas replenishment enthalpy-increasing port.

[0017] The present invention also provides an air conditioner including the above-described two-stage enthalpy-increasing compressor.

[0018] The pump assembly, two-stage enthalpy-increasing compressor, and air conditioner provided by this invention have the following beneficial effects:

[0019] A pressure regulating valve plate that can move under the action of pressure difference is installed in the intermediate pressure chamber. Both the upper and lower sides of the pressure regulating valve plate are connected to the enthalpy increasing component through enthalpy increasing pipes. When the pressure in the gas supply chamber fluctuates during the operation of the compressor, the pressure regulating valve plate will move towards the side with lower pressure under the action of pressure difference. This causes the volume of the gas supply chamber and the pressure equalization chamber in the intermediate pressure chamber to change, thereby ensuring that the pressure in the gas supply chamber is the same as the pressure in the enthalpy increasing component. This improves the pressure fluctuation in the intermediate pressure chamber of the two-stage enthalpy increasing compressor, thereby reducing the noise and vibration of the two-stage enthalpy increasing compressor and improving the enthalpy increasing performance of the two-stage enthalpy increasing compressor, thus enhancing the user experience.

[0020] The first gas injection port, the first cavity, the guide hole, and the second gas injection port are arranged sequentially from top to bottom along the pump body assembly on the low-pressure stage cylinder, the upper partition, the high-pressure stage cylinder, and the lower flange. The pump body assembly has a reasonable and compact structural design.

[0021] The anti-tipping guide structure can ensure that the pressure regulating valve plate slides up and down along the depth of the guide hole, so as to realize the volume change adjustment of the aforementioned air replenishment chamber and pressure equalization chamber during pressure fluctuations. At the same time, it can also prevent the pressure regulating valve plate from tipping over during displacement, ensuring the reliable realization of its function.

[0022] Setting grooves on the inner wall of the guide hole and setting convex strips on the outer peripheral edge of the pressure regulating valve plate can reduce the manufacturing difficulty of the guide hole. For example, the corresponding grooves can be machined after the through hole is machined, making the process arrangement more reasonable.

[0023] By arranging the gas replenishment and enthalpy increase ports and the intake and exhaust ports on opposite sides of the pump body assembly, the assembly of the corresponding pipes on the pump body assembly can be simple and easy to operate. The aforementioned annular first cavity achieves the design purpose of the aforementioned arrangement on both sides.

[0024] When the ratio of the two is greater than 1 / 5, the pressure equalization chamber has enough space to regulate the fluctuating medium-pressure refrigerant. However, if the volume of the pressure equalization chamber is designed to be too large, it will reduce the strength of the parts and reduce the sealing distance of the parts holes, which will lead to refrigerant leakage. Attached Figure Description

[0025] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0026] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0027] Figure 1 This is a schematic diagram of the internal structure of the pump body assembly in an embodiment of the present invention;

[0028] Figure 2 for Figure 1 Schematic diagram of the internal structure of a central component (partial cross-section);

[0029] Figure 3 for Figure 1 A schematic diagram showing the flow direction of refrigerant in the intermediate pressure chamber of the pump body assembly;

[0030] Figure 4 This is a schematic diagram of the internal structure of a two-stage enthalpy-increasing compressor according to another embodiment of the present invention;

[0031] Figure 5 The graph shows a comparison of the intermediate pressure of the compressor using the technical solution of this application with that of a conventional two-stage enthalpy-increasing compressor (i.e., one in which a pressure regulating valve plate is installed inside the intermediate pressure chamber).

[0032] Figure 6 A comparison curve of the noise spectrum of the compressor using the technical solution of this application and a conventional two-stage enthalpy-increasing compressor (that is, a pressure regulating valve plate is installed inside the pressure chamber);

[0033] Figure 7 The graph shows a performance comparison between the compressor using the technical solution of this application and a conventional two-stage enthalpy-increasing compressor (that is, a pressure regulating valve plate is installed inside the pressure chamber).

[0034] The reference numerals in the attached figures are as follows:

[0035] 1. Low-pressure stage compression section; 11. Low-pressure stage cylinder; 12. Low-pressure stage roller; 2. High-pressure stage compression section; 21. High-pressure stage cylinder; 211. Guide through hole; 22. Lower flange; 23. High-pressure stage roller; 3. Intermediate-pressure chamber; 31. First gas injection and enthalpy-increasing port; 32. Second gas injection and enthalpy-increasing port; 33. Pressure regulating valve plate; 341. Gas injection chamber; 342. Pressure equalization chamber; 51. Upper partition; 52. Lower partition; 53. First chamber; 100. Enthalpy-increasing component; 101. First inner tube; 102. Second inner tube; 103. Housing; 104. Distributor; 105. Crankshaft; 106. Upper flange; 1061. Upper flange cover plate; 107. Silencer. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0038] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0039] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0040] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0041] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0042] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0043] See also Figures 1 to 7As shown, according to an embodiment of the present invention, a pump assembly is provided for use in a two-stage enthalpy-increasing compressor. It includes a low-pressure stage compression section 1, a high-pressure stage compression section 2, and an intermediate-pressure chamber 3 connecting the low-pressure stage compression section 1 and the high-pressure stage compression section 2. The intermediate-pressure chamber 3 has a first gas injection enthalpy-increasing port 31 and a second gas injection enthalpy-increasing port 32. Both the first gas injection enthalpy-increasing port 31 and the second gas injection enthalpy-increasing port 32 are connected to the enthalpy-increasing component 100 of the two-stage enthalpy-increasing compressor via enthalpy-increasing pipes (not labeled in the figure). It is also understood that the intermediate-pressure chamber 3 is also connected to the low-pressure stage compression section 1, so that the intermediate-pressure refrigerant compressed by the low-pressure stage compression section 1 enters the intermediate-pressure chamber 3 and mixes with the intermediate-pressure refrigerant injected with gas. Simultaneously, the intermediate-pressure chamber 3 is also connected to the high-pressure stage compression section 2. The medium-pressure refrigerant mixed in the medium-pressure chamber 3 can enter the high-pressure stage compression section 2 for secondary compression. The medium-pressure chamber 3 has a pressure regulating valve plate 33, which divides the medium-pressure chamber 3 into a gas replenishment chamber 341 and a pressure equalization chamber 342. When there is a pressure difference between the gas replenishment chamber 341 and the pressure equalization chamber 342, the valve plate 33 can move towards the side with the lower pressure. The first gas replenishment enthalpy-increasing port 31 is connected to the gas replenishment chamber 341, and the second gas replenishment enthalpy-increasing port 32 is connected to the pressure equalization chamber 342. The medium-pressure chamber 3 is connected to the high-pressure stage compression section 2 via the gas replenishment chamber 341. That is, the medium-pressure refrigerant in the medium-pressure chamber 3 is mixed in the gas replenishment chamber 341 and then enters the high-pressure stage compression section 2 for secondary compression. In this technical solution, it is understood that the pressure regulating valve plate 33 should maintain its separation from the intermediate pressure chamber 3 during the movement process, that is, to prevent refrigerant from leaking between the aforementioned air supply chamber 341 and the pressure equalization chamber 342.

[0044] In this technical solution, a pressure regulating valve plate 33 that can move under the action of pressure difference is set in the intermediate pressure chamber 3. Both the upper and lower sides of the pressure regulating valve plate 33 are connected to the enthalpy increasing component 100 through enthalpy increasing pipes. When the pressure of the gas supply chamber 341 fluctuates during the operation of the compressor, the pressure regulating valve plate 33 will move towards the side with lower pressure under the action of pressure difference, thereby causing the volume of the gas supply chamber 341 and the pressure equalization chamber 342 of the intermediate pressure chamber 3 to change. This ensures that the pressure in the gas supply chamber 341 is the same as the pressure in the enthalpy increasing component 100, which improves the pressure fluctuation of the intermediate pressure chamber of the two-stage enthalpy increasing compressor, thereby reducing the noise and vibration of the two-stage enthalpy increasing compressor and improving the enthalpy increasing performance of the two-stage enthalpy increasing compressor, thus improving the user experience.

[0045] See details Figure 1 As shown, the air supply chamber 341 is located above the pressure regulating valve plate 33, and the pressure equalization chamber 342 is located below the pressure regulating valve plate 33. Figure 3As shown, when the compressor starts working, the constant medium-pressure refrigerant enters the medium-pressure chamber 3 (specifically, the gas supply chamber 341) from the enthalpy-increasing component 100 through the first gas supply enthalpy-increasing port 31. It mixes with the medium-pressure refrigerant discharged from the low-pressure stage compression section 1. Because it fails to enter the high-pressure stage compression section 2 in time, fluctuating medium pressure is formed in the gas supply chamber 341, and this fluctuating medium pressure acts on the upper part of the pressure regulating valve plate 33. Simultaneously, the constant medium-pressure refrigerant enters the pressure equalization chamber 3 from the enthalpy-increasing component 100 through the second gas supply enthalpy-increasing port 32. 42. The pressure regulating valve plate 33 is subjected to a constant medium pressure. When the pressure fluctuation in the pressure equalization chamber 342 increases, the pressure regulating valve plate 33 moves downward, the volume of the air replenishment chamber 341 increases, and the pressure decreases. Conversely, when the pressure fluctuation in the air replenishment chamber 341 decreases, the pressure regulating valve plate 33 moves upward, the volume of the air replenishment chamber 341 decreases, and the constant medium pressure refrigerant enters the air replenishment chamber 341 from the first air replenishment enthalpy-increasing port 31, increasing the pressure in the air replenishment chamber 341. This ensures that the pressure in the air replenishment chamber 341 is always the same as the pressure below the pressure regulating valve plate 33.

[0046] See details Figure 2 As shown, the low-pressure stage compression section 1 and the high-pressure stage compression section 2 are stacked. In some embodiments, the pump body assembly further includes a partition assembly (not shown in the figure) for separating the low-pressure stage compression section 1 and the high-pressure stage compression section 2. The partition assembly includes an upper partition 51 and a lower partition 52 stacked vertically, with a first cavity 53 formed between the upper partition 51 and the lower partition 52. Specifically, for example, an opening groove is constructed on the lower end surface of the upper partition 51, and the lower partition 52 acts as a cover to close the opening of the opening groove, thereby forming the aforementioned first cavity 53. The low-pressure stage compression section 1 includes a low-pressure stage cylinder 11, and the high-pressure stage... The compression section 2 includes a high-pressure stage cylinder 21 and a lower flange 22 connected to the end face of the high-pressure stage cylinder 21 away from the lower partition plate 52. The first gas injection port 31 is constructed on the low-pressure stage cylinder 11 and communicates with the upper opening of the first cavity 53. The high-pressure stage cylinder 21 is constructed with a guide hole 211 communicating with the lower opening of the first cavity 53. The second gas injection port 32 is constructed on the lower flange 22 and communicates with the lower opening of the guide hole 211. The first cavity 53 and the guide hole 211 together form the medium-pressure cavity 3, and the pressure regulating valve plate 33 is located in the guide hole 211.

[0047] In this technical solution, the first gas replenishment enthalpy port 31, the first cavity 53, the guide through hole 211 and the second gas replenishment enthalpy port 32 are arranged sequentially from top to bottom along the pump body assembly on the low-pressure stage cylinder 11, the upper partition plate 51, the high-pressure stage cylinder 21 and the lower flange 22. The structural design of the pump body assembly is reasonable and compact.

[0048] In a preferred embodiment, an anti-tipping guide structure (not shown in the figure) is provided between the inner wall of the guide hole 211 and the outer edge of the pressure regulating valve plate 33. The anti-tipping guide structure ensures that the pressure regulating valve plate 33 slides up and down along the depth direction of the guide hole 211 to realize the volume change adjustment of the aforementioned air replenishment chamber 341 and pressure equalization chamber 342 during pressure fluctuations. At the same time, it can also prevent the pressure regulating valve plate 33 from tipping over during displacement, ensuring the reliable realization of its function.

[0049] In one specific embodiment, the anti-rollover guide structure includes multiple protrusions and grooves that correspond to each of the protrusions. Each of the protrusions is circumferentially spaced along the guide through hole 211 and extends axially along the guide through hole 211. The protrusions are located on the pressure regulating valve plate 33, and the grooves are located on the inner wall of the hole.

[0050] In this technical solution, the pressure regulating valve plate 33 achieves smooth and reliable displacement through the guiding effect of the convex strip and the engagement between the convex strip and the groove. Furthermore, it should be noted that setting the groove on the inner wall of the guide hole 211 and placing the convex strip on the outer peripheral edge of the pressure regulating valve plate 33 reduces the manufacturing difficulty of the guide hole 211. For example, the corresponding groove can be machined after the through hole is machined, resulting in a more rational process arrangement. It is understandable that the material of the aforementioned pressure regulating valve plate 33 is rationally selected based on the actual medium pressure and pressure resistance requirements, while its plate thickness should consider both its deformation resistance and its resistance to tipping over.

[0051] In some embodiments, the first cavity 53 is an annular cavity, and the primary exhaust port (not shown or unlabeled in the figure) of the low-pressure stage compression section 1 and the secondary intake port (not labeled in the figure) of the high-pressure stage compression section 2 are both connected to the annular cavity. The guide through hole 211, the first gas replenishment enthalpy increase port 31, and the second gas replenishment enthalpy increase port 32 are located on the first side of the pump body assembly, and the primary exhaust port and the secondary intake port are located on the second side of the pump body assembly. The first side and the second side are opposite sides of the pump body assembly.

[0052] In this technical solution, by arranging the gas replenishment enthalpy increase ports and the intake and exhaust ports on opposite sides of the pump body assembly, the assembly of the corresponding pipes on the pump body assembly can be simple and easy to operate. The aforementioned annular first cavity 53 achieves the design purpose of the aforementioned arrangement on both sides.

[0053] In a preferred embodiment, the volume of the first cavity 53 is Va, and the volume of the guide hole 211 is Vb, where Va / 5 ≤ Vb ≤ Va / 4. Experimental verification shows that when the ratio of the two is greater than 1 / 5, the pressure equalization cavity 342 has sufficient space to regulate fluctuating medium-pressure refrigerant. However, if the volume of the pressure equalization cavity 342 is designed to be too large, it will reduce the strength of the components and decrease the sealing distance of the component holes, leading to refrigerant leakage.

[0054] See Figure 4 As shown in the embodiment of the present invention, a two-stage enthalpy-increasing compressor is also provided, including a housing 103, wherein the housing 103 is provided with the above-mentioned pump assembly. Specifically, the two-stage enthalpy-increasing compressor further includes the above-mentioned enthalpy-increasing component 100, and the enthalpy-increasing tube includes a first inner tube 101 and a second inner tube 102. The first inner tube 101 is connected to the first gas injection enthalpy-increasing port 31, and the second inner tube 102 is connected to the second gas injection enthalpy-increasing port 32.

[0055] In this technical solution, by setting two internal insertion tubes in the inner cavity of the enthalpy-increasing component 100 and connecting them to the first gas replenishment enthalpy-increasing port 31 and the second gas replenishment enthalpy-increasing port 32 respectively, the adverse effects of gas replenishment fluctuations that may occur when using a single enthalpy-increasing tube with a downstream branch (e.g., through a three-way valve) can be effectively prevented.

[0056] Figure 5 The diagram shows a comparison of the intermediate pressure chamber pressure of the compressor using the above-mentioned technical solution of the present invention and a conventional compressor. It can be seen that the pressure fluctuation range of the intermediate pressure chamber of the conventional compressor is 0.3 MPa, while the pressure fluctuation range of the intermediate pressure chamber of the compressor of the present invention is 0.1 MPa, and the pressure fluctuation of the intermediate pressure chamber is significantly improved.

[0057] Figure 6 The diagram shows a comparison of the noise spectrum of the compressor using the above-mentioned technical solution of the present invention and a conventional compressor. The pressure fluctuation in the intermediate pressure chamber of the two-stage enthalpy-increasing compressor has a relatively severe impact on the compressor noise. If the pressure fluctuation in the intermediate pressure chamber can be improved, the compressor noise level can be improved. As shown in the figure, the compressor of the present invention has lower noise peaks in many places in the 500-800Hz frequency band than the conventional compressor, thus improving the compressor noise level and enhancing the user experience.

[0058] Figure 7 The diagram shows a performance comparison between the compressor using the above-mentioned technical solution of the present invention and a conventional compressor. The two-stage enthalpy-increasing compressor needs to achieve the best performance at the optimal intermediate pressure. If the intermediate chamber pressure is higher or lower than the optimal intermediate pressure, the compressor performance will be reduced. If the intermediate chamber pressure can be kept constant at the optimal intermediate pressure, the compressor performance will be effectively improved. As can be seen from the figure, the compressor of the present invention has higher energy efficiency than the conventional compressor, and the compressor performance is improved.

[0059] According to an embodiment of the present invention, an air conditioner is also provided, including the above-described two-stage enthalpy-increasing compressor.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A pump assembly for use in a two-stage enthalpy-increasing compressor, comprising a low-pressure stage compression section (1), a high-pressure stage compression section (2), and an intermediate-pressure chamber (3) communicating between the low-pressure stage compression section (1) and the high-pressure stage compression section (2), characterized in that, The intermediate pressure chamber (3) has a first gas injection enthalpy-increasing port (31) and a second gas injection enthalpy-increasing port (32). Both the first gas injection enthalpy-increasing port (31) and the second gas injection enthalpy-increasing port (32) are connected to the enthalpy-increasing component (100) of the two-stage enthalpy-increasing compressor through enthalpy-increasing pipes. The intermediate pressure chamber (3) has a pressure regulating valve plate (33), which divides the intermediate pressure chamber (3) into a gas injection chamber (341) and a pressure chamber (35). The pressure equalization chamber (342) is able to move toward the side with lower pressure when there is a pressure difference between the gas replenishment chamber (341) and the pressure equalization chamber (342). The first gas replenishment enthalpy increase port (31) is connected to the gas replenishment chamber (341), the second gas replenishment enthalpy increase port (32) is connected to the pressure equalization chamber (342), and the medium pressure chamber (3) is connected to the high pressure stage compression section (2) via the gas replenishment chamber (341).

2. The pump body assembly according to claim 1, characterized in that, The low-pressure stage compression section (1) and the high-pressure stage compression section (2) are stacked. The pump body assembly also includes a partition assembly for separating the low-pressure stage compression section (1) and the high-pressure stage compression section (2). The partition assembly includes an upper partition (51) and a lower partition (52) stacked vertically. A first cavity (53) is formed between the upper partition (51) and the lower partition (52). The low-pressure stage compression section (1) includes a low-pressure stage cylinder (11). The high-pressure stage compression section (2) includes a high-pressure stage cylinder (21) and an end face connected to the high-pressure stage cylinder (21) away from the lower partition (52). The lower flange (22) is constructed on the low-pressure stage cylinder (11) and communicates with the upper opening of the first cavity (53). The high-pressure stage cylinder (21) is constructed with a guide hole (211) communicating with the lower opening of the first cavity (53). The second gas injection port (32) is constructed on the lower flange (22) and communicates with the lower opening of the guide hole (211). The first cavity (53) and the guide hole (211) together form the medium-pressure cavity (3), and the pressure regulating valve plate (33) is located in the guide hole (211).

3. The pump body assembly according to claim 2, characterized in that, The inner wall of the guide hole (211) has an anti-rollover guide structure between it and the outer edge of the pressure regulating valve plate (33).

4. The pump body assembly according to claim 3, characterized in that, The anti-rollover guide structure includes multiple protrusions and grooves that correspond to each of the protrusions. Each protrusion is spaced circumferentially along the guide through hole (211) and extends axially along the guide through hole (211). The protrusions are located on the pressure regulating valve plate (33), and the grooves are located on the inner wall of the hole.

5. The pump body assembly according to claim 2, characterized in that, The first cavity (53) is an annular cavity. The first-stage exhaust port of the low-pressure stage compression section (1) and the second-stage intake port of the high-pressure stage compression section (2) are both connected to the annular cavity. The guide through hole (211), the first gas replenishment enthalpy port (31), and the second gas replenishment enthalpy port (32) are located on the first side of the pump body assembly. The first-stage exhaust port and the second-stage intake port are located on the second side of the pump body assembly. The first side and the second side are the opposite sides of the pump body assembly.

6. The pump body assembly according to claim 2, characterized in that, The volume of the first cavity (53) is Va, and the volume of the guide hole (211) is Vb, where Va / 5≤Vb≤Va / 4.

7. A two-stage enthalpy-increasing compressor, comprising a housing (103), characterized in that, The housing (103) is provided with a pump body assembly as described in any one of claims 1 to 6.

8. The two-stage enthalpy-increasing compressor according to claim 7, characterized in that, It also includes the enthalpy-increasing component (100), the enthalpy-increasing tube includes a first inner tube (101) and a second inner tube (102), the first inner tube (101) is connected to the first gas replenishment enthalpy-increasing port (31), and the second inner tube (102) is connected to the second gas replenishment enthalpy-increasing port (32).

9. An air conditioner, characterized in that, Includes the two-stage enthalpy-increasing compressor as described in claim 7 or 8.

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