Refrigerant liquid homogenizing device, model selection method and heat pump air conditioning unit

Abstract

The invention relates to the technical field of air conditioners, and provides a refrigerant liquid homogenizing device, a model selection method and a heat pump air conditioning unit. The refrigerant liquid homogenizing device comprises a liquid separation mechanism, a partition plate, a liquid inlet pipe and a plurality of liquid outlet pipes, and a liquid separation cavity is formed in the inner side of the liquid separation mechanism; the separation plate is arranged in the liquid separation cavity, is coaxial with the liquid separation mechanism, divides the liquid separation cavity into a first chamber and a second chamber, and is provided with a plurality of liquid separation holes communicated with the first chamber and the second chamber, and the plurality of liquid separation holes are circumferentially and uniformly formed by taking the axis of the liquid separation mechanism as the center; the liquid inlet pipe is communicated with the first chamber; the multiple liquid outlet pipes communicate with the second cavity and are evenly arranged around the axis of the liquid distribution mechanism in the circumferential direction. Coolants flowing into the heat exchangers can be ensured to be equal and uniform, the heat exchange effects of the heat exchangers are ensured to be the same, and the performance of the heat pump air conditioning unit is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a refrigerant liquid equalization device, a selection method and a heat pump air conditioning unit. Background Art

[0002] Heat pump air conditioners can save a lot of energy and reduce dependence on fossil fuels, thereby reducing carbon emissions and environmental pollution, and are energy-saving and environmentally friendly. They are widely used in large shopping malls, factories, subways and other projects.

[0003] The heat exchangers in heat pump air conditioners need to exchange heat with the air. If the refrigerant entering each heat exchanger is unequal or uneven, the heat exchange effect will vary, affecting the performance of the unit. Therefore, a refrigerant balancing device is needed to evenly distribute the refrigerant to each heat exchanger. Summary of the Invention

[0004] The present invention provides a refrigerant liquid equalization device, a selection method and a heat pump air-conditioning unit, which are used to solve the problem of uneven refrigerant distribution to each heat exchanger in the heat pump air-conditioning unit in the prior art.

[0005] The present invention provides a refrigerant liquid equalization device, comprising:

[0006] A liquid separation mechanism, wherein a liquid separation cavity is formed inside the liquid separation mechanism;

[0007] a partition plate disposed in the liquid separation chamber and coaxial with the liquid separation mechanism, dividing the liquid separation chamber into a first chamber and a second chamber, the partition plate being provided with a plurality of liquid separation holes communicating with the first chamber and the second chamber, the plurality of liquid separation holes being uniformly arranged circumferentially around the axis of the liquid separation mechanism;

[0008] a liquid inlet pipe, connected to the first chamber;

[0009] A plurality of liquid outlet pipes are communicated with the second chamber and are evenly arranged circumferentially around the axis of the liquid separation mechanism.

[0010] A refrigerant liquid equalization device provided by the present invention further includes:

[0011] The liquid separation head is coaxial with and fixedly connected to the partition plate and is located in the first chamber. The end of the liquid separation head away from the partition plate is configured as a conical structure. The multiple liquid separation holes are located on the circumference of the liquid separation head.

[0012] According to a refrigerant liquid equalization device provided by the present invention, the liquid inlet pipe is coaxial with the liquid separation head, and the end of the liquid inlet pipe faces the tip of the liquid separation head.

[0013] A refrigerant liquid equalization device provided by the present invention further includes:

[0014] A liquid blocking member is located in the second chamber. One end is fixedly connected to the partition plate, and the other end is fixedly connected to the inner wall of the liquid distribution mechanism. The liquid blocking member is of a rotary body structure and is coaxial with the liquid distribution mechanism. The plurality of liquid outlet pipes and the plurality of liquid distribution holes are both located on the circumferential side of the liquid blocking member.

[0015] For a refrigerant liquid equalizing device provided by the present invention, the liquid blocking member is of a cylindrical structure.

[0016] For a refrigerant liquid equalizing device provided by the present invention, the liquid distribution mechanism includes an intermediate cylinder, a first sealing plate and a second sealing plate. The first sealing plate and the second sealing plate are respectively disposed at two ends of the intermediate cylinder. The liquid inlet pipe is fixedly connected to the first sealing plate, the plurality of liquid outlet pipes are fixedly connected to the second sealing plate, and the partition plate is fixedly connected to the inner wall of the intermediate cylinder.

[0017] For a refrigerant liquid equalizing device provided by the present invention, a support ring is provided on the inner wall of the intermediate cylinder. The edge of the partition plate is lapped and cooperated with the support ring and is hermetically fixed.

[0018] For a refrigerant liquid equalizing device provided by the present invention, the partition plate is of a regular polygon structure. The corners of the partition plate are in contact with the inner wall of the intermediate cylinder, and the inner diameter of the support ring is less than or equal to the diameter of the inscribed circle of the partition plate.

[0019] The present invention also provides a method for selecting a refrigerant liquid equalizing device, including:

[0020] Determining the total number of liquid outlet pipes based on the total refrigerating capacity of the unit and the heat exchange capacity of a single heat exchanger;

[0021] Determining the number of refrigerant liquid equalizing devices and the combination mode of the refrigerant liquid equalizing devices based on the total number of liquid outlet pipes, the flow rate of the liquid inlet pipe, the flow area of the liquid inlet pipe and the preset range of the refrigerant flow velocity in the liquid inlet pipe;

[0022] Determining the number of liquid distribution holes based on the number of liquid outlet pipes, the flow area of a single refrigerant liquid equalizing device and the diameter of a single liquid distribution hole.

[0023] The present invention also provides a heat pump air conditioner unit, including an expansion valve and a plurality of heat exchangers, and further including the refrigerant liquid equalizing device as described above. The expansion valve is communicated with the liquid inlet pipe, and the plurality of heat exchangers are respectively communicated with the plurality of liquid outlet pipes.

[0024] The refrigerant equalizing device, selection method, and heat pump air conditioner unit provided by the present invention allow the refrigerant to enter the first chamber through the liquid inlet pipe, and then be divided through the liquid dividing holes on the partition plate so that the refrigerant evenly flows into the second chamber, and then flows out through a plurality of liquid outlet pipes arranged circumferentially and evenly. This can ensure that the refrigerant flowing into each heat exchanger is equal in quantity and uniform, which is beneficial to ensuring the same heat exchange effect of each heat exchanger and improving the performance of the heat pump air conditioner unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 is the front view of a refrigerant equalizing device provided by the present invention;

[0027] Figure 2 is the top view of a refrigerant equalizing device provided by the present invention;

[0028] Figure 3 is the exploded view of a refrigerant equalizing device provided by the present invention;

[0029] Figure 4 is the side view of a partition plate in a refrigerant equalizing device provided by the present invention;

[0030] Figure 5 is the structural schematic diagram of a heat pump air conditioner unit provided by the present invention;

[0031] Reference Numerals:

[0032] 10, liquid dividing mechanism; 11, intermediate cylinder; 12, first sealing plate; 13, second sealing plate; 14, support ring; 20, partition plate; 21, liquid dividing hole; 30, liquid inlet pipe; 40, liquid outlet pipe; 50, liquid dividing head; 60, liquid retaining member; 70, base; 101, expansion valve; 102, heat exchanger; 103, air compressor; 104, evaporator; 105, gas-liquid separator; 106, drying filter; 107, economizer; 108, check valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following will further describe in detail the embodiments of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0034] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the embodiments of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0035] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0036] In the embodiments of the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath", and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0037] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0038] The following is combined with Figures 1 to 5Describe the refrigerant equalizing device according to the embodiments of the present invention. This refrigerant equalizing device can be applied to a heat pump air conditioner unit to evenly disperse the refrigerant flowing out of the expansion valve 101 into multiple heat exchangers 102.

[0039] Combined with Figures 1 to 3 , the refrigerant equalizing device according to the embodiments of the present invention includes a liquid separation mechanism 10, a partition plate 20, a liquid inlet pipe 30, and a liquid outlet pipe 40; a liquid separation cavity is formed inside the liquid separation mechanism 10; the partition plate 20 is arranged in the liquid separation cavity, coaxial with the liquid separation mechanism 10, and divides the liquid separation cavity into a first chamber and a second chamber. The partition plate 20 is provided with a plurality of liquid separation holes 21 communicating the first chamber and the second chamber, and the plurality of liquid separation holes 21 are circumferentially and evenly arranged around the axis of the liquid separation mechanism 10; the liquid inlet pipe 30 communicates with the first chamber; a plurality of liquid outlet pipes 40 communicate with the second chamber and are circumferentially and evenly arranged around the axis of the liquid separation mechanism 10.

[0040] In this embodiment, the liquid inlet pipe 30 is adapted to be connected to the expansion valve 101 through structures such as pipelines and one-way valves 108. The plurality of liquid outlet pipes 40 are adapted to be respectively connected to the corresponding plurality of heat exchangers 102 through structures such as pipelines. There is a one-to-one correspondence between the plurality of liquid outlet pipes 40 and the plurality of heat exchangers 102. The refrigerant flowing out of the expansion valve 101 flows into the first chamber from the liquid inlet pipe 30 and flows into the second chamber through the plurality of liquid separation holes 21. The refrigerant in the second chamber flows out through the plurality of liquid outlet pipes 40. Since the plurality of liquid separation holes 21 are circumferentially and evenly arranged around the axis of the liquid separation mechanism 10, the refrigerant flows into the second chamber evenly when flowing from the first chamber. Further, since the plurality of liquid outlet pipes 40 are circumferentially and evenly arranged around the axis of the liquid separation mechanism 10, the refrigerant in the second chamber can be evenly distributed to the plurality of liquid outlet pipes 40, achieving the equalizing effect.

[0041] In this embodiment, the liquid inlet pipe 30 is directly connected to the expansion valve 101 through control elements such as a pipeline system and a one-way valve 108 to ensure that the refrigerant flowing out of the expansion valve 101 and adjusted to an appropriate state can be accurately and effectively introduced into the first chamber of the refrigerant equalizing device. The plurality of liquid outlet pipes 40 adopt a similar connection method. Through an independent and symmetrically arranged pipeline structure, seamless docking is achieved with each heat exchanger 102 respectively, forming a one-to-one correspondence relationship, ensuring the pertinence and accuracy of refrigerant distribution.

[0042] When the refrigerant enters the first chamber from the expansion valve 101 via the liquid inlet pipe 30, due to the design of multiple liquid distribution holes 21 evenly distributed circumferentially on the partition plate 20, the refrigerant flowing into the second chamber is fully dispersed radially and smoothly transitioned, achieving a uniform distribution in space. Further, under the action of multiple liquid outlet pipes 40 evenly arranged circumferentially in the second chamber, the refrigerant can flow to each corresponding heat exchanger 102 in a balanced proportion, effectively avoiding the difference in refrigerant flow rate between each heat exchanger 102, ensuring that each heat exchanger 102 can obtain sufficient refrigerant supply, and maintaining the consistency of its surface temperature and frosting condition, which is crucial for improving the coefficient of performance (COP) of the entire heat pump air-conditioning unit.

[0043] In summary, the refrigerant equalization device of the present invention not only simplifies the refrigerant distribution process, improves the stability and reliability of the system, but also greatly improves the energy efficiency ratio and operating efficiency of the air-conditioning system by optimizing the flow path and flow distribution of the refrigerant among various components, helps reduce energy consumption and maintenance costs, thus demonstrating excellent technical effects.

[0044] It should be noted that in this embodiment, the multiple liquid distribution holes 21 being axially evenly arranged with the axis of the liquid distribution mechanism 10 as the center means that the liquid distribution holes 21 can be arranged in one or more circles. The liquid distribution holes 21 in the same circle are equally angled with the axis of the liquid distribution mechanism 10 as the center, and the liquid distribution holes 21 in different circles can be radially aligned or offset along the axis of the liquid distribution mechanism 10. The multiple liquid outlet pipes 40 being circumferentially evenly arranged around the axis of the liquid distribution mechanism 10 means that the multiple liquid outlet pipes 40 are equally angled with the axis of the liquid distribution mechanism 10 as the center.

[0045] Combined with Figure 4 , in some embodiments of the present invention, the refrigerant equalization device further includes a liquid distribution head 50. The liquid distribution head 50 is coaxial with the partition plate 20 and fixedly connected. The liquid distribution head 50 is located in the first chamber. One end of the liquid distribution head 50 facing away from the partition plate 20 is provided with a conical structure, and multiple liquid distribution holes 21 are located on the circumferential side of the liquid distribution head 50. After the refrigerant enters the first chamber, the conical structure of the liquid distribution head 50 can evenly disperse the refrigerant outward.

[0046] When the refrigerant enters the first chamber from the liquid inlet pipe 30, it first passes through the liquid distributor 50. The conical structure of the liquid distributor 50 plays a role in guiding and dispersing the fluid, enabling the refrigerant that might originally be concentrated or have inconsistent directions to be evenly diffused in all directions under the influence of the conical surface after contacting the liquid distributor 50. This design greatly enhances the pre-treatment effect of the refrigerant before it enters the liquid distribution holes 21, ensuring that the refrigerant can flow more evenly through the multiple circumferentially arranged liquid distribution holes 21 on the partition plate 20 into the second chamber. Therefore, by virtue of the special structure of the liquid distributor 50, the present invention not only improves the rationality of the internal flow path of the refrigerant liquid equalization device but also significantly enhances the overall device's ability to accurately and evenly distribute the refrigerant, thereby contributing to improving the working efficiency of multiple radiators in the heat pump air conditioner unit and the system energy efficiency ratio, reducing the problem of uneven local frosting caused by uneven refrigerant distribution, and laying a foundation for realizing efficient, energy-saving, and stable air conditioner operation.

[0047] Optionally, the liquid inlet pipe 30 and the liquid distributor 50 are coaxial, and the end of the liquid inlet pipe 30 faces the tip of the liquid distributor 50. Specifically, the axial direction of the liquid inlet pipe 30 is carefully set to be consistent with the central axis of the liquid distributor 50. This alignment arrangement is conducive to the refrigerant flowing in a straight line when entering the device and ensures that it is directly guided to the tip position of the liquid distributor 50 after flowing out of the expansion valve 101.

[0048] Designing the end of the liquid inlet pipe 30 to face the tip of the conical structure of the liquid distributor 50 can utilize the flow guiding characteristics of the liquid distributor 50 to effectively disperse and initially equalize the liquid of the refrigerant in the initial stage of entering the first chamber. Due to the special shape of the tip of the liquid distributor 50, it can guide the refrigerant to flow towards the multiple liquid distribution holes 21 on the partition plate 20 at a relatively uniform speed and distribution range, further enhancing the balance of refrigerant distribution within the entire device, reducing the occurrence of situations where the local refrigerant flow rate is too large or too small, thereby improving the working efficiency of the finned heat exchanger 102 and ensuring the optimization and improvement of the overall performance (COP) of the air-cooled screw heat pump air conditioner unit. It helps to reduce the adverse effects caused by uneven frosting, ensuring the stable operation of the air conditioner system and the effective utilization of energy.

[0049] The liquid distributor 50 in this embodiment can adopt a structural form combining a cylindrical structure and a conical structure, or only adopt a conical structure form. When adopting the first structural form, the diameter of the cylindrical part of the liquid distributor 50 is equal to the maximum diameter of the conical part. One end of the cylindrical part is fixedly connected to the partition plate 20, and the other end is fixedly connected to the conical part. Thus, the streamline of the two-phase flow entering the first chamber can be changed, increasing the degree of disorder of the two-phase flow, so that the gas-liquid two-phase in the first chamber is fully mixed and evenly distributed into the liquid distribution holes 21.

[0050] In some embodiments of the present invention, the refrigerant equalizing device further includes a liquid baffle 60. The liquid baffle 60 is located in the second chamber, with one end fixedly connected to the partition plate 20 and the other end fixedly connected to the inner wall of the liquid distribution mechanism 10. The liquid baffle 60 has a rotary body structure and is coaxial with the liquid distribution mechanism 10. A plurality of liquid outlet pipes 40 and a plurality of liquid distribution holes 21 are both located on the circumferential side of the liquid baffle 60.

[0051] The rotary body structure in this embodiment can be a cylindrical structure or a frustum-shaped structure, etc. Preferably, the liquid baffle 60 adopts a cylindrical structure. Due to its circumferential non-blocking characteristic, it can effectively prevent the refrigerant from flowing centrally towards the axial center of the second chamber under the action of gravity, thereby enhancing the uniformity of the refrigerant flowing out from each liquid distribution hole 21 and significantly improving the equalizing effect.

[0052] Optionally, the liquid baffle 60 is a cylindrical structure. Selecting a cylindrical structure as the liquid baffle 60 is also beneficial for material saving and cost reduction of production. While meeting the functional requirements, it reduces the overall weight, which is not only conducive to equipment installation, transportation and maintenance, but also has a positive effect on improving the overall coefficient of performance (COP) of the heat pump air conditioner unit and energy conservation and consumption reduction. Through such design improvements, the present invention successfully solves problems such as low efficiency caused by uneven refrigerant distribution and uneven frosting of the fin heat exchanger 102, and improves the operation stability and economy of the system.

[0053] In some embodiments of the present invention, the liquid distribution mechanism 10 includes an intermediate cylinder 11, a first sealing plate 12 and a second sealing plate 13. The first sealing plate 12 and the second sealing plate 13 are respectively disposed at both ends of the intermediate cylinder 11. The liquid inlet pipe 30 is fixedly connected to the first sealing plate 12, a plurality of liquid outlet pipes 40 are fixedly connected to the second sealing plate 13, and the partition plate 20 is fixedly connected to the inner wall of the intermediate cylinder 11.

[0054] Specifically, the liquid inlet pipe 30 is closely connected to the first sealing plate 12. Through the through hole provided at the center of the first sealing plate 12, the refrigerant flowing out from the expansion valve 101 can directly enter the first chamber of the liquid distribution device. At the same time, a plurality of through holes circumferentially arranged around its axis are evenly distributed on the second sealing plate 13, and each through hole corresponds to a liquid outlet pipe 40. Such a design ensures that the refrigerant flowing out from the second chamber can be evenly distributed to each heat exchanger 102.

[0055] The partition plate 20, as a key internal component, is coaxial with the intermediate cylinder 11, and its edge is firmly fixed to the inner wall of the intermediate cylinder 11, thereby dividing the interior of the intermediate cylinder 11 into two independent spaces - namely, the first chamber and the second chamber. When the refrigerant flows into the first chamber from the liquid inlet pipe 30 and passes through the liquid distribution holes 21 on the partition plate 20, it evenly flows towards the second chamber and is finally evenly discharged by a plurality of liquid outlet pipes 40 arranged on the second sealing plate 13, achieving the purpose of effectively equalizing the refrigerant.

[0056] This structural design not only ensures the rational distribution of the refrigerant, but also takes into account the compactness and reliability of the entire device, which helps to improve the operating efficiency of the unit, optimize the working performance of the heat exchanger 102, and achieve more efficient energy utilization.

[0057] See you later Figure 3 In some embodiments of the present invention, a support ring 14 is provided on the inner wall of the intermediate cylinder 11 , and the edge of the partition plate 20 overlaps with the support ring 14 and is sealed and fixed.

[0058] The support ring 14 is coaxial with the intermediate cylinder 11, and the outer side of the support ring 14 is relatively fixed to the inner wall of the intermediate cylinder 11 to form a seal. For example, the support ring 14 and the intermediate cylinder 11 are fixedly connected by bonding, or the support ring 14 and the intermediate cylinder 11 are integrally formed.

[0059] The support ring 14 can facilitate the installation of the partition plate 20 and provide support for the partition plate 20 .

[0060] In certain embodiments of the present invention, support ring 14 is aligned with and tightly fitted to the axis of intermediate cylinder 11. Its outer side is securely connected to the inner wall of intermediate cylinder 11, ensuring a gap-free and well-sealed seal between the two. This secure connection can be achieved by bonding or integral molding. Support ring 14 enhances the stability and sealing of divider plate 20 within intermediate cylinder 11, provides additional mechanical strength and stability, ensures that divider plate 20 does not wobble or deform after installation, and effectively prevents refrigerant leakage from the edges of divider plate 20.

[0061] In this way, the partition plate 20 is fully supported when subjected to refrigerant pressure and temperature changes, maintaining long-term and stable operating performance. At the same time, this design simplifies the installation process of the partition plate 20, improves assembly efficiency, and further ensures the reliability and accuracy of the entire refrigerant liquid equalization device.

[0062] Optionally, the partition plate 20 is a regular polygonal structure, such as a regular hexagon or regular octagon, with the corners of the partition plate 20 abutting the inner wall of the intermediate cylinder 11, and the inner diameter of the support ring 14 being less than or equal to the diameter of the inscribed circle of the partition plate 20. In this embodiment, abutting the corners of the partition plate 20 against the inner wall of the intermediate cylinder 11 facilitates positioning of the partition plate 20, thereby ensuring that the partition plate 20 is coaxial with the intermediate cylinder 11 after installation. The inner diameter of the support ring 14 being less than or equal to the diameter of the inscribed circle of the partition plate 20 facilitates sealing between the partition plate 20 and the support ring 14, and ensures a secure fixation between the support ring 14 and the partition plate 20.

[0063] In some embodiments of the present invention, the refrigerant liquid equalizing device further includes a base 70, which includes a first seat body and a second seat body. A symmetrical structure is formed between the first seat body and the second seat body. An arc-shaped structure adapted to the outer wall of the liquid distribution mechanism 10 is provided on the side where the first seat body and the second seat body approach each other. The first seat body and the second seat body are fixedly connected to the liquid distribution mechanism 10 by means such as bonding and clamping. Mounting structures such as bolt holes are provided on the first seat body and the second seat body to facilitate the stable fixation of the refrigerant liquid equalizing device.

[0064] Combined with Figure 5 , an embodiment of the present invention further provides a heat pump air conditioner unit, which includes an expansion valve 101 and a plurality of heat exchangers 102, and also includes the refrigerant liquid equalizing device described above. The expansion valve 101 is communicated with the liquid inlet pipe 30, and the plurality of heat exchangers 102 are respectively communicated with a plurality of liquid outlet pipes 40.

[0065] Optionally, the heat pump air conditioner unit of this embodiment further includes an air compressor 103, an evaporator 104, a gas-liquid separator 105, a dryer filter 106, an economizer 107, a check valve 108, etc.

[0066] Optionally, the heat pump air conditioner unit in this embodiment is an air-cooled screw heat pump unit, the heat exchanger 102 is a finned heat exchanger, and the evaporator 104 is a shell-and-tube evaporator.

[0067] The refrigerant liquid equalizing device in this embodiment can be provided with one or multiple according to different usage requirements. For example, when the number of liquid outlet pipes 40 of a single refrigerant liquid equalizing device is 3 and the number of heat exchangers 102 is 6, two refrigerant liquid equalizing devices with liquid inlet pipes 30 connected in parallel through a three-way valve can be provided, so that the 6 liquid outlet pipes 40 of the two refrigerant liquid equalizing devices are connected to the 6 heat exchangers 102 in a one-to-one correspondence. Of course, when the requirements of liquid equalizing and flow rate are met, a single refrigerant liquid equalizing device with the same number of liquid outlet pipes 40 as the number of heat exchangers 102 can also be selected to meet the usage requirements.

[0068] Next, a method for selecting the refrigerant liquid equalizing device provided by the present invention will be described. The method for selecting the refrigerant liquid equalizing device described below can be mutually referred to with the refrigerant liquid equalizing device described above.

[0069] The method for selecting the refrigerant liquid equalizing device in this embodiment includes:

[0070] S100. Determine the total number of liquid outlet pipes 40 based on the total refrigerating capacity of the unit and the heat exchange capacity of a single heat exchanger 102. Let the total refrigerating capacity of the unit be Q1, the heat exchange capacity of a single heat exchanger 102 be Q2, the number of heat exchangers 102 be N, and the total number of liquid outlet pipes 40 be n. Then, n = N = Q1 / Q2.

[0071] S200. Determine the number and combination mode of the refrigerant liquid equalizing devices based on the total number of the liquid outlet pipes 40, the flow rate of the liquid inlet pipes 30, the flow area of the liquid inlet pipes 30, and the preset range of the refrigerant flow velocity in the liquid inlet pipes 30.

[0072] During actual operation, there are two determination methods as follows:

[0073] 1. First, determine the number of the refrigerant liquid equalizing devices according to the flow rate Q of the liquid inlet pipes 30, the flow area s of the liquid inlet pipes 30, and the preset range of the refrigerant flow velocity in the liquid inlet pipes 30. Then, select the combination mode of the refrigerant liquid equalizing devices according to the total number of the liquid outlet pipes 40. Specifically, the end values v max and v min of the preset range of the flow area s of the liquid inlet pipes 30 and the refrigerant flow velocity in the liquid inlet pipes 30 (for example, 10 m / s - 15 m / s) can be substituted into the calculation formula v = Q / s to obtain the maximum and minimum values of Q. Through the calculation formula Q = Q 总 / m, the interval range of m can be calculated, where Q 总 is the total system flow rate, m is the number of the liquid inlet pipes 30, and the number of the liquid inlet pipes 30 is the number of the refrigerant liquid equalizing devices. Then, select the combination mode of the refrigerant liquid equalizing devices according to the total number of the liquid outlet pipes 40. For example, the number n1 of the liquid outlet pipes 40 of the refrigerant liquid equalizing devices includes four types: n1 = 3, 4, 5, and 6. The total number n of the liquid outlet pipes 40 is 10, and the interval range of m is 1 < m < 3. Then, m = 2, and the selectable combination modes are the modes in which the total number of the liquid outlet pipes 40 is 10 after combining 2 refrigerant liquid equalizing devices, that is, the combination modes are (4 + 6) and (5 + 5).

[0074] 2. First, select the combination mode of the refrigerant liquid equalizing devices according to the total number of the liquid outlet pipes 40, and then screen according to the preset range of the refrigerant flow velocity in the liquid inlet pipes 30.

[0075] Taking the number n1 of the liquid outlet pipes 40 of the refrigerant liquid equalizing devices including four types: n1 = 3, 4, 5, and 6, and the total number n of the liquid outlet pipes 40 being 10 as an example, the selectable combination modes include three types: (3 + 3 + 4), (4 + 6), and (5 + 5). Among them, the number of the refrigerant liquid equalizing devices required for (3 + 3 + 4) is 3, and the corresponding number m of the liquid inlet pipes 30 is also 3. The numbers of the refrigerant liquid equalizing devices required for the two combination modes of (4 + 6) and (5 + 5) are both 2, and the corresponding number m of the liquid inlet pipes 30 is also 2. At this time, the flow rate Q of each liquid inlet pipe 30 when the number m of the liquid inlet pipes 30 is 2 and when the number m of the liquid inlet pipes 30 is 3 can be obtained respectively through the total system flow rate Q 总 The calculation formula is Q = Q 总 / m. Then, according to the flow area s of the liquid inlet pipe 30, the flow velocity v of the refrigerant in the liquid inlet pipe 30 when the number of liquid inlet pipes 30 is 2 and when the number of liquid inlet pipes 30 is 3 is calculated respectively. The calculation formula is v = Q / s. Select the combination mode in which the flow velocity v of the refrigerant in the liquid inlet pipe 30 is within the preset range (for example, 10 m / s - 15 m / s).

[0076] S300. Determine the number of liquid distribution holes 21 on the partition plate 20 based on the number of liquid outlet pipes 40, the flow area of the liquid outlet pipes 40, and the diameter of a single liquid distribution hole 21 in a single refrigerant equalization device. Specifically, it is obtained by calculating through the following formula:

[0077] n3 = a·n·s` / (π·d·d / 4);

[0078] where n3 is the number of liquid distribution holes 21 on the partition plate 20;

[0079] a is a proportionality coefficient;

[0080] s` is the flow area of the liquid outlet pipe 40;

[0081] d is the diameter of a single liquid distribution hole 21.

[0082] Generally, when a is between 2.5 and 4, the heat pump air conditioner unit can achieve good performance, and d is less than or equal to one-sixth of the flow area s` of the liquid outlet pipe 40.

[0083] It should be noted that there is no sequence priority between step S200 and step S300 in this embodiment.

[0084] For the refrigerant equalization device, the selection method, and the heat pump air conditioner unit provided by the present invention, after the refrigerant enters the first chamber through the liquid inlet pipe 30, it is separated through the liquid distribution holes 21 on the partition plate 20, so that the refrigerant evenly flows into the second chamber, and then flows out through a plurality of circumferentially evenly arranged liquid outlet pipes 40, which can ensure that the refrigerant flowing into each heat exchanger 102 is equal in amount and uniform, is beneficial to ensuring the same heat exchange effect of each heat exchanger 102, and improves the performance of the heat pump air conditioner unit.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A refrigerant liquid homogenizing device, characterized in that, Comprising: A liquid separation mechanism (10), a liquid separation cavity is formed inside the liquid separation mechanism (10); A partition plate (20), arranged in the liquid separation cavity, coaxial with the liquid separation mechanism (10), separating the liquid separation cavity into a first chamber and a second chamber. The partition plate (20) is provided with a plurality of liquid separation holes (21) communicating the first chamber and the second chamber, and the plurality of liquid separation holes (21) are circumferentially and uniformly arranged around the axis of the liquid separation mechanism (10); An inlet pipe (30), communicating with the first chamber; A plurality of outlet pipes (40), communicating with the second chamber, and circumferentially and uniformly arranged around the axis of the liquid separation mechanism (10).

2. The refrigerant equalization device according to claim 1, wherein Further comprising: A liquid separation head (50), coaxial with and fixedly connected to the partition plate (20), located in the first chamber. One end of the liquid separation head (50) facing away from the partition plate (20) is provided with a conical structure, and the plurality of liquid separation holes (21) are located on the circumferential side of the liquid separation head (50).

3. The refrigerant liquid equalizing device according to claim 2, wherein, The inlet pipe (30) is coaxial with the liquid separation head (50), and the end of the inlet pipe (30) faces the tip of the liquid separation head (50).

4. The refrigerant equalizing device according to claim 1, wherein Further comprising: A liquid blocking member (60), located in the second chamber, one end fixedly connected to the partition plate (20), and the other end fixedly connected to the inner wall of the liquid separation mechanism (10). The liquid blocking member (60) is of a rotating body structure and coaxial with the liquid separation mechanism (10). The plurality of outlet pipes (40) and the plurality of liquid separation holes (21) are both located on the circumferential side of the liquid blocking member (60).

5. The refrigerant liquid equalizing device according to claim 4, characterized in that, The liquid blocking member (60) is of a cylindrical structure.

6. The refrigerant equalization device according to any one of claims 1 to 5, characterized in that, 7. The refrigerant liquid equalizing device according to claim 6, characterized in that, The liquid separation mechanism (10) includes an intermediate cylinder body (11), a first sealing plate (12) and a second sealing plate (13). The first sealing plate (12) and the second sealing plate (13) are respectively arranged at both ends of the intermediate cylinder body (11). The inlet pipe (30) is fixedly connected to the first sealing plate (12), the plurality of outlet pipes (40) are fixedly connected to the second sealing plate (13), and the partition plate (20) is fixedly connected to the inner wall of the intermediate cylinder body (11).

8. The refrigerant liquid equalization device according to claim 7, wherein A support ring (14) is arranged on the inner wall of the intermediate cylinder body (11). The edge of the partition plate (20) is lapped and sealed with the support ring (14).

9. A method for selecting a refrigerant equalization device according to any one of claims 1 to 8, characterized in that, The partition plate (20) is of a regular polygon structure. The corners of the partition plate (20) are in contact with the inner wall of the intermediate cylinder body (11), and the inner diameter of the support ring (14) is less than or equal to the diameter of the inscribed circle of the partition plate (20). Comprising: Determining the total number of the outlet pipes (40) based on the total refrigerating capacity of the unit and the heat exchange capacity of a single heat exchanger (102); Determining the number and combination mode of the refrigerant liquid equalizing devices based on the total number of the outlet pipes (40), the flow rate of the inlet pipe (30), the flow area of the inlet pipe (30) and the preset range of the refrigerant flow velocity in the inlet pipe (30); Determining the number of the liquid separation holes (21) based on the number, flow area of the outlet pipes (40) of a single refrigerant liquid equalizing device and the diameter of a single liquid separation hole (21).

10. A heat pump air conditioning unit, comprising an expansion valve (101) and a plurality of heat exchangers (102), characterized in that, It further includes a refrigerant equalizing device as described in any one of claims 1 to 8, wherein the expansion valve (101) is communicated with the liquid inlet pipe (30), and the plurality of heat exchangers (102) are respectively communicated with the plurality of liquid outlet pipes (40).

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