Air inlet connecting pipe and compressor
By designing an intake connection pipe with a main channel and multiple bypass channels, using the specific structure and angle design of the main channel and bypass channel, the forward one-way conduction of the air flow and the reverse return of the air flow is achieved, solving the problem of refrigerant reflux in the prior art, and improving the performance of the compressor.
Patent Information
- Application Number
- CN202421464037.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-25
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-06-25
AI Technical Summary
The intake connection pipe in the existing injection compressor cannot effectively prevent the refrigerant in the compression chamber from flowing back into the injection circuit, resulting in a decrease in cold force, an increase in power, and a decrease in performance.
An intake connection pipe is designed, with a main channel and multiple bypass channels inside. Through the specific structure and angle design of the main channel and bypass channel, the resistance of the reverse flow of the air flow in the main channel is much greater than the resistance of the forward flow, thereby achieving a self-throttling effect, realizing the forward one-way conduction of the air flow, and preventing the reverse return of the air flow.
The forward one-way conduction of the air flow is achieved, which prevents the reverse return of the air flow, reduces the energy loss of the gas in transportation, and improves the single-unit performance of the compressor, which can be improved by up to 7%, which is manifested as increased capacity and reduced power.
Smart Images
Figure CN222686828U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of compressors, in particular to an air intake connecting pipe and a compressor comprising the air intake connecting pipe. Background Art
[0002] In the existing jet compressor structure, the injection circuit is composed of a liquid reservoir, an air intake connecting pipe and a cylinder. The gaseous refrigerant in the liquid reservoir is delivered to the cylinder through the air intake connecting pipe and sprayed into the compression chamber of the cylinder. When the injection is turned on, the piston rotates until the pressure of the compression chamber in the cylinder is greater than the injection pressure, and the refrigerant in the compression chamber will flow back to the injection circuit, resulting in reduced cooling force, increased power and reduced performance. The air intake connecting pipe in the prior art cannot effectively prevent the refrigerant in the compression chamber from flowing back to the injection circuit, and the interior of the compressor is a closed structure. If a traditional one-way valve is set inside the compressor to prevent the refrigerant in the compression chamber from flowing back, the reliability of the valve is far from meeting the needs of the compressor product, and the maintenance of the valve will be a big problem. Therefore, there is an urgent need for an air intake connecting pipe structure that can effectively prevent the refrigerant in the compression chamber from flowing back to the injection circuit. Utility Model Content
[0003] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the utility model is to provide an air intake connecting pipe which can realize one-way conduction of airflow and prevent backflow of airflow.
[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0005] The utility model provides an air intake connecting pipe, the interior of which is composed of a main channel and a plurality of side channels, one end of the main channel is an air inlet for air flow to flow in, and the other end is an air outlet for air flow to flow out, the plurality of side channels are arranged at intervals outside the main channel along the extension direction of the main channel, the side channel has a reflux inlet section, an intermediate section and a reflux outlet section which are connected in sequence, the reflux outlet section is located on a side of the reflux inlet section close to the air inlet, the reflux inlet section and the reflux outlet section are both connected to the main channel and extend from the main channel in a direction close to the air inlet and deviating from the main channel, and the angle at which the reflux outlet section deviates from the main channel is less than 50°.
[0006] Preferably, the angle of the reflux inlet section away from the main channel is less than 50°
[0007] Preferably, the reflux outlet section extends in an arc shape or in a straight shape.
[0008] Preferably, the reflux inlet section extends in a straight shape.
[0009] Preferably, the middle section extends in a curved shape.
[0010] Preferably, at least two rows of side channels are evenly distributed outside the main channel along the circumferential direction, each row of side channels includes a plurality of side channels spaced apart along the extension direction of the main channel, and the rows of side channels are alternately distributed in the extension direction of the main channel.
[0011] Preferably, the main channel extends in a straight shape.
[0012] Preferably, the main channel has a plurality of straight sections connected in sequence, the straight sections extend in a straight shape, and adjacent straight sections are connected at an angle, so that the main channel extends in a zigzag shape.
[0013] Preferably, at least one bypass channel is provided on each straight section.
[0014] The utility model also provides a compressor, comprising the air intake connecting pipe as described above.
[0015] Compared with the prior art, the present invention has significant improvements:
[0016] The utility model air intake connecting pipe, through the specific structure and angle design of the main channel and the side channel, makes the resistance of the reverse flow of the airflow in the main channel much greater than the resistance of the forward flow, thereby achieving a self-throttling effect, and can achieve forward one-way conduction of the airflow and prevent the reverse flow of the airflow. This self-throttling air intake connecting pipe has no moving parts inside, and can achieve forward one-way conduction of the airflow without inputting energy; the difference between the forward flow and the reverse flow of the airflow in the air intake connecting pipe is huge, and no mechanical movement is required inside. The spatial structure is used to promote the gas flow, and the gas is accelerated through the physical structure, which reduces the energy loss of the gas during transportation. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a three-dimensional schematic diagram of the air intake connecting pipe of the first embodiment of the utility model.
[0018] Figure 2 It is a front view schematic diagram of the air intake connecting pipe of the first embodiment of the utility model.
[0019] Figure 3 yes Figure 2 Enlarged schematic diagram of part A in the middle.
[0020] Figure 4 It is a schematic diagram of the air flow direction of the air intake connecting pipe of the first embodiment of the utility model.
[0021] Figure 5 It is a front view schematic diagram of the air intake connecting pipe of the second embodiment of the utility model.
[0022] The reference numerals are described as follows:
[0023] 1 Main channel
[0024] 11 Air Inlet
[0025] 12 Air outlet
[0026] 13 Straight section
[0027] 2 Side channels
[0028] 21 Reflux inlet section
[0029] 22 Middle section
[0030] 23 Reflux outlet section DETAILED DESCRIPTION
[0031] The following is a further detailed description of the specific implementations of the present invention in conjunction with the accompanying drawings. These implementations are only used to illustrate the present invention, but not to limit the present invention.
[0032] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0034] In addition, in the description of the present invention, unless otherwise specified, “plurality” means two or more.
[0035] Embodiment 1
[0036] like Figures 1 to 4 The figure shows the first embodiment of the air intake connecting pipe provided by the utility model.
[0037] See also Figures 1 to 3The interior of the air intake connecting pipe of the first embodiment is composed of a main channel 1 and a plurality of side channels 2. Among them, one end of the main channel 1 is an air inlet 11 for air flow to flow in, and the other end of the main channel 1 is an air outlet 12 for air flow to flow out. The main channel 1 is connected between the air inlet 11 and the air outlet 12 to form a flow path for air flow. A plurality of side channels 2 are arranged outside the main channel 1 at intervals along the extension direction of the main channel 1. The extension direction of the main channel 1 is also the extension direction of the flow path for air flow. The side channel 2 has a reflux inlet section 21, an intermediate section 22 and a reflux outlet section 23 which are connected in sequence. The end of the reflux inlet section 21 away from the intermediate section 22 is connected to the main channel 1, and the end of the reflux outlet section 23 away from the intermediate section 22 is connected to the main channel 1, so that the side channel 2 is connected in parallel with the main channel 1. The reflux outlet section 23 is located on the side of the reflux inlet section 21 close to the air inlet 11. The reflux inlet section 21 and the reflux outlet section 23 both extend from the main channel 1 in a direction close to the air inlet 11 and away from the main channel 1, so that the bypass channel 2 is wing-shaped relative to the main channel 1. Figure 3 , the angle at which the reflux outlet section 23 deviates from the main channel 1 is α, which is also called the T-intersection angle; the angle at which the reflux inlet section 21 deviates from the main channel 1 is β, which is also called the bifurcation angle. Since both the reflux inlet section 21 and the reflux outlet section 23 extend from the main channel 1 in a direction close to the air inlet 11, the angle β at which the reflux inlet section 21 deviates from the main channel 1 and the angle α at which the reflux outlet section 23 deviates from the main channel 1 do not exceed 90°. In the first embodiment, the angle α at which the reflux outlet section 23 deviates from the main channel 1 is set to be less than 50°. Preferably, the angle β at which the reflux inlet section 21 deviates from the main channel 1 is also set to be less than 50°.
[0038] Hence, see Figure 4 When the airflow flows from the air inlet 11 into the main channel 1, the airflow flows through the main channel 1 to the air outlet 12 and flows out from the air outlet 12. This is the positive conduction direction of the airflow by the air inlet connecting pipe of the first embodiment. Figure 4As shown by the solid arrow in the middle. When the airflow flows in the forward conducting direction, it will successively pass through the connecting port between the reflux outlet section 23 of the bypass channel 2 and the main channel 1 and the connecting port between the reflux inlet section 21 and the main channel 1. Since the reflux outlet section 23 and the reflux inlet section 21 of the bypass channel 2 both extend from the main channel 1 in a direction close to the air inlet 11 and deviating from the main channel 1, the airflow flowing into the main channel 1 from the air inlet 11 is not easy to enter the bypass channel 2, and most of the mainstream of the airflow will flow along the main channel 1. Even if a small amount of gas diffuses into the bypass channel 2, it will flow back to the main channel 1 due to the parallel connection between the bypass channel 2 and the main channel 1, and finally merge with the mainstream of the airflow and flow out from the air outlet 12, that is, the bypass channel 2 does not hinder the airflow flowing forward in the main channel 1. Therefore, when the air intake connecting pipe of the first embodiment conducts the airflow forward, the airflow can bypass all obstacles in the bypass channel 2 and flow unimpeded from the air inlet 11 to the air outlet 12 along the main channel 1, and can obtain an acceleration effect due to the flow pressure.
[0039] When the airflow flows from the air outlet 12 into the main channel 1 in the reverse direction, as shown in FIG. Figure 4 As shown by the dotted arrow, when the airflow passes through the connecting port between the reflux inlet section 21 of the bypass channel 2 and the main channel 1, it will be split into two tributaries at the reflux inlet section 21 of the bypass channel 2, one of which continues to flow along the main channel 1, and the other flows into the bypass channel 2 from the reflux inlet section 21, and after flowing through the bypass channel 2, flows back to the main channel 1 from the reflux outlet section 23 of the bypass channel 2. The tributary flowing back to the main channel 1 from the reflux outlet section 23 of the bypass channel 2 impacts and collides with the tributary flowing along the main channel 1, forming a vortex and hindering the flow of air. Therefore, the bypass channel 2 hinders the reverse flow of the airflow in the main channel 1. Every time the reverse flow of the airflow in the main channel 1 passes through the connecting port between the reflux inlet section 21 of the bypass channel 2 and the main channel 1, it will enter the bypass channel 2 and flow back to the main channel 1 from the reflux outlet section 23 of the bypass channel 2, thereby impacting and colliding the airflow in the main channel 1, causing a blocking effect on the airflow in the main channel 1 and increasing the pressure head, thereby hindering the overall flow of the airflow to the air inlet 11. The smaller the angle α (T-shaped intersection angle) at which the reflux outlet section 23 of the side channel 2 deviates from the main channel 1, the more the impact and collision between the tributary flowing back from the reflux outlet section 23 to the main channel 1 and the tributary flowing along the main channel 1 can be increased, thereby achieving a counter-impact effect. The intake connecting pipe of the first embodiment sets the angle α at which the reflux outlet section 23 deviates from the main channel 1 to be less than 50°, thereby ensuring a counter-impact effect and being able to fully and effectively hinder the reverse flow of the airflow in the main channel 1. Furthermore, setting the angle β at which the reflux inlet section 21 deviates from the main channel 1 to be less than 50° is also conducive to allowing more airflow to enter the reflux inlet section 21, increasing the airflow entering the side channel 2, thereby increasing the impact and collision between the tributary flowing back from the reflux outlet section 23 to the main channel 1 and the tributary flowing along the main channel 1, thereby enhancing the impact and hindering effect.
[0040] The design of the intake connecting pipe of the first embodiment makes the resistance of the reverse flow of the airflow in the main channel 1 much greater than the resistance of the forward flow, thereby achieving a self-throttling effect, and being able to achieve forward one-way conduction of the airflow and prevent reverse flow of the airflow. This self-throttling intake connecting pipe has no moving parts inside, and can achieve forward one-way conduction of the airflow without inputting energy; the difference between the forward flow and the reverse flow of the airflow in the intake connecting pipe is huge, and no mechanical movement is required inside. The spatial structure is used to promote the gas flow, and the physical structure is used to accelerate the gas, thereby reducing the energy loss of the gas during transportation.
[0041] Therefore, the intake connecting pipe of the first embodiment can be applied to the injection circuit of the compressor. With the intake connecting pipe of the first embodiment, even when the injection is turned on, the piston runs to the point where the pressure of the compression chamber in the cylinder is greater than the injection pressure, and the refrigerant airflow in the compression chamber flows back to the injection circuit, it can be offset in the intake connecting pipe, thereby eliminating the backflow of the refrigerant airflow. The intake connecting pipe of the first embodiment is used in the injection circuit of the compressor, and the performance of the compressor unit is tested. The results show that the performance of the compressor unit can be improved by 7% at most, mainly in terms of increased capacity and reduced power. This shows that the refrigerant airflow flowing back to the injection circuit is indeed blocked by the bypass channel 2 of the intake connecting pipe.
[0042] In the air intake connecting pipe of the first embodiment, the number of the side channels 2 is not limited. It is understandable that the more the number of the side channels 2, the greater the resistance to the airflow flowing from the air outlet 12 into the main channel 1 to the air inlet 11, and the better the blocking effect on the reverse backflow airflow. Preferably, in the first embodiment, at least two rows of side channels 2 are evenly distributed along the circumferential direction outside the main channel 1, and each row of side channels 2 includes a plurality of side channels 2 spaced apart along the extension direction of the main channel 1, and the spacing between adjacent side channels 2 in each row of side channels 2 is not limited, and each row of side channels 2 is alternately distributed in the extension direction of the main channel 1.
[0043] In the first embodiment, preferably, the main channel 1 extends in a straight shape. The cross-sectional shape of the main channel 1 is not limited, for example, it can be rectangular or circular or other shapes. Figure 1 and Figure 2 In the figure, the cross-sectional shape of the main channel 1 is a rectangle as an example. When the main channel 1 adopts a rectangular cross-section, the side channels 2 are preferably arranged in two rows, and the two rows of side channels 2 are respectively arranged on two opposite side surfaces that are coplanar with the long sides of the main channel 1 and the rectangular cross-section, so that the two rows of side channels 2 are arranged face to face.
[0044] In the first embodiment, preferably, the reflux outlet section 23 of the bypass channel 2 extends in an arc shape or straight shape. The reflux inlet section 21 of the bypass channel 2 extends in a straight shape. The middle section 22 of the bypass channel 2 extends in a curved shape. Thus, the bypass channel 2 is in a curved wing shape.
[0045] Embodiment 2
[0046] like Figure 5 As shown, it is a second embodiment of the intake connecting pipe provided by the utility model. The second embodiment is basically the same as the first embodiment, and the similarities are not repeated here. The difference is that in the second embodiment, the main channel 1 has a plurality of straight sections 13 connected in sequence, and the straight sections 13 extend in a straight shape. The adjacent straight sections 13 are connected at an angle, so that the main channel 1 extends in a zigzag shape. Preferably, each straight section 13 is provided with at least one bypass channel 2.
[0047] Embodiment 3
[0048] Based on the intake connecting pipes of the above-mentioned embodiments 1 and 2, embodiment 3 provides four intake connecting pipe samples AE with different T-shaped intersection angles α, bifurcation angles β, numbers of side channels 2 and forms of main channels 1, and the reflux ratios of the intake connecting pipe samples A, B, C, D and E during use are tested respectively, as shown in Table 1 below. In Table 1, the reflux ratio refers to the ratio of the reflux to the total flow.
[0049] Table 1 Test results of intake connecting pipe samples
[0050]
[0051] It can be seen that when the T-shaped intersection angle α is below 50°, the blocking effect of the return airflow is more obvious, and the return ratio is smaller. Moreover, at the same bifurcation angle β, the smaller the T-shaped intersection angle α, the smaller the return ratio; the more side channels there are, the greater the return resistance, and the smaller the return ratio. In comparison, the main channel 1 adopts a zigzag extension form, which has a more obvious blocking effect and a smaller return ratio than the main channel 1 adopts a straight extension form.
[0052] Embodiment 4
[0053] Embodiment 4 provides an embodiment of the compressor of the utility model. The compressor of the present embodiment 4 includes an air intake connecting pipe of the utility model. The air intake connecting pipe can adopt any one of the air intake connecting pipes provided in the above-mentioned embodiments 1 to 3. The air intake connecting pipe is arranged in the liquid reservoir cylinder of the compressor. The gaseous refrigerant in the liquid reservoir cylinder flows into the air intake connecting pipe from the air inlet 11 of the air intake connecting pipe, flows forward in the air intake connecting pipe to the air outlet 12, flows out from the air outlet 12 to the cylinder and is sprayed into the compression chamber of the cylinder. When the injection is turned on, the piston runs until the pressure of the compression chamber in the cylinder is greater than the injection pressure. When the refrigerant airflow in the compression chamber flows back to the injection circuit, the reflux airflow will be blocked and offset by the bypass channel 2 in the air intake connecting pipe, so as to achieve the purpose of preventing the refrigerant airflow from flowing back.
[0054] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.
Claims
1. An air intake connecting pipe, characterized in that: The air intake connecting pipe is internally constituted of a main channel (1) and a plurality of side channels (2); one end of the main channel (1) is an air inlet (11) for air flow to flow in, and the other end is an air outlet (12) for air flow to flow out; the plurality of side channels (2) are arranged outside the main channel (1) at intervals along the extension direction of the main channel (1); the side channel (2) comprises a reflux inlet section (21), an intermediate section (22) and a reflux outlet section (23) which are connected in sequence; the reflux outlet section (23) is located on a side of the reflux inlet section (21) close to the air intake (11); the reflux inlet section (21) and the reflux outlet section (23) are both connected to the main channel (1) and extend from the main channel (1) in a direction close to the air intake (11) and deviating from the main channel (1); the angle at which the reflux outlet section (23) deviates from the main channel (1) is less than 50°.
2. The air intake connecting pipe according to claim 1, characterized in that: The angle at which the reflux inlet section (21) deviates from the main channel (1) is less than 50°.
3. The air intake connecting pipe according to claim 1, characterized in that: The reflux outlet section (23) extends in an arc shape or in a straight shape.
4. The air intake connecting pipe according to claim 1, characterized in that: The reflux inlet section (21) extends in a straight shape.
5. The air intake connecting pipe according to claim 1, characterized in that: The middle section (22) extends in a curved shape.
6. The air intake connecting pipe according to claim 1, characterized in that: At least two rows of the side channels (2) are evenly distributed along the circumferential direction outside the main channel (1), each row of the side channels (2) comprises a plurality of the side channels (2) spaced apart along the extension direction of the main channel (1), and each row of the side channels (2) is alternately distributed in the extension direction of the main channel (1).
7. The air intake connecting pipe according to claim 1, characterized in that: The main channel (1) extends in a straight shape.
8. The air intake connecting pipe according to claim 1, characterized in that: The main channel (1) has a plurality of straight sections (13) connected in sequence, the straight sections (13) extending in a straight shape, and adjacent straight sections (13) are connected at an angle, so that the main channel (1) extends in a zigzag shape.
9. The air intake connecting pipe according to claim 8, characterized in that: At least one bypass channel (2) is provided on each of the straight sections (13).
10. A compressor, characterized in that: Comprising the air intake connecting pipe as claimed in any one of claims 1 to 9.