A flow field transformation mechanism and a refrigerator having the mechanism

Abstract

The present invention discloses a flow field conversion mechanism and a refrigerator having the same, belonging to the technical field of refrigerators. The flow field conversion mechanism comprises a rotor part and a stator part. The rotor part is provided with a first countersunk hole and a second countersunk hole distributed in an annular manner. The radial dimension of the first countersunk hole is larger than the radial dimension of the second countersunk hole. The center of the rotor part is provided with a first direct current countersunk hole connected with the second countersunk hole. The stator part is provided with a first deep hole and a second through hole. The position of the first deep hole corresponds to the proximal end position of the first countersunk hole, and the position of the second through hole corresponds to the radial position of the second countersunk hole. The stator part is also provided with a first direct current through hole adapted to the first direct current countersunk hole. The refrigerator comprises the above-mentioned flow field conversion mechanism. The flow field conversion mechanism serves as an intermediate structure between the refrigerator and the compressor, realizes the airflow exchange between the refrigerator and the compressor, and converts the direct current airflow into an alternating airflow to supply the refrigerator.

Description

Technical Field

[0001] The present invention relates to a flow field control mechanism and a refrigerator, and more particularly to a flow field conversion mechanism and a refrigerator having the mechanism. Background Art

[0002] As representatives of small regenerative cryogenic refrigerators, GM refrigerators and pulse tube refrigerators have undergone many technological innovations since their invention in the 1960s. They have been widely used in industrial production and scientific research in the ultra-low temperature field below 77K, including semiconductor production, low-temperature physical property analysis and measurement, quantum computing, etc. The key to the normal operation of the regenerative cryogenic refrigerator is that the internal flow field must be maintained, that is, the pressure of the internal fluid changes periodically. In order to achieve the flow field requirements, this type of refrigerator usually uses a linear compressor based on a linear motor to directly supply air, or uses a compressor that outputs direct current fluid, combined with the switching of high and low pressure valves to achieve an alternating flow field in the refrigerator. Linear compressors are high in cost and low in pressure ratio, and are only suitable for special scenarios. The high and low pressure valve switching structure has a significant impact on the efficiency of the refrigerator, including its opening and closing cycle, duration, opening and closing angle, etc. If the pressure change rate is too high, it will not only increase the irreversible loss, but also produce whistling noise, which will not only reduce the efficiency of the refrigerator, but also affect its user experience and safety.

[0003] For example: Chinese patent announcement number CN101776078B, announcement date September 7, 2011, invention name is fully enclosed refrigeration compressor and its rotor compressor unit, including a cylinder with a concave accommodating portion, an end cover, a rotor, a transmission shaft, an inner rotor, an outer rotor and three sliding vanes; the end cover cooperates with the concave accommodating portion of the cylinder to form a sealed internal chamber for accommodating the rotor, and its inner end surface is provided with an inlet and an exhaust port respectively connected to the inlet and exhaust channels; compared with the prior art, the rotor compressor unit provided by this scheme has an inner rotor, a rotor and an outer rotor nested from the inside to the outside, forming a primary working chamber and a secondary working chamber; driven by the motor, the rotor drives the inner rotor and the outer rotor to rotate eccentrically through the ends of the three sliding vanes. As the rotor rotates, the volume of each relatively sealed working chamber changes periodically, and the gas enters the secondary working chamber for secondary compression after being compressed in the primary working chamber, so as to effectively improve the efficiency of the compressor. However, this solution only changes the volume of the working chamber periodically and cannot provide an alternating flow field, thus failing to meet the flow field requirements of a regenerative cryogenic refrigerator. Summary of the invention

[0004] The present invention overcomes the defects of the traditional air supply method of the above-mentioned refrigerator and provides a flow field conversion mechanism and a refrigerator with the mechanism. This scheme can realize the efficient conversion of the DC flow field into the alternating flow field. Under the premise of ensuring that the flow area is not reduced, it reduces the irreversible loss generated in the process of flow field pressure switching, and can also improve the refrigeration efficiency of the refrigerator.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: a flow field conversion mechanism, including a rotor part and a stator part, the rotor part is provided with a first countersunk hole and a second countersunk hole distributed in an annular manner, the radial dimension of the first countersunk hole is larger than the radial dimension of the second countersunk hole, and the center of the rotor part is provided with a first direct current countersunk hole connected with the second countersunk hole; the stator part is provided with a first deep hole and a second through hole, the position of the first deep hole corresponds to the proximal end position of the first countersunk hole, the position of the second through hole corresponds to the radial position of the second countersunk hole, and the stator part is also provided with a first direct current through hole adapted to the first direct current countersunk hole. In the present solution, the stator part is a fixed structure, while the rotor part can rotate relative to the stator. The first DC through hole on the stator part is aligned with the first DC counterbore on the rotor part to form a DC air path. A high-pressure airflow is introduced into the first DC through hole of the stator part, enters the first DC counterbore of the rotor part, and then enters the second counterbore through the first DC counterbore. When the second counterbore on the rotor rotates to correspond to the second through hole, the high-pressure airflow can be output from the second through hole of the stator part. When the position of the second counterbore is staggered from the position of the second through hole, the channel of the high-pressure airflow is disconnected. In this way, through the continuous rotation of the rotor part, the output of alternating high-pressure airflow can be realized, and the DC flow field can be converted into an alternating flow field to meet the alternating flow field required for refrigeration, thereby improving the refrigeration efficiency of the refrigerator.

[0006] Preferably, the rotor part includes a first sealing surface, the first countersunk hole, the second countersunk hole and the first direct current countersunk hole are all arranged on the first sealing surface, the stator part includes a second sealing surface, the first deep hole, the second through hole and the first direct current through hole are all connected to the second sealing surface, and the first sealing surface and the second sealing surface are rotatably matched. The stator part and the rotor part are attached together through the second sealing surface and the first sealing surface to form contact rotation and ensure the sealing effect between the rotor part and the stator part. The first sealing surface and the second sealing surface are the axial end surfaces of the rotor part and the stator part respectively.

[0007] Preferably, the first counterbore includes a proximal end and a distal end, the proximal end is connected to the distal end, the position of the proximal end corresponds to the position of the first deep hole, and the position of the distal end corresponds to the radial position of the second counterbore and the radial position of the second through hole. The proximal end and the distal end of the first counterbore are connected together, so that when the gas in the refrigerator flows back to the position of the first counterbore through the second counterbore, it flows from the distal end to the proximal end, and then flows back to the compressor through the first deep hole.

[0008] Preferably, an annular countersunk hole is provided in the circumference of the first deep hole, the outer diameter of the annular countersunk hole corresponds to the outer diameter of the first deep hole, and the inner diameter of the annular countersunk hole corresponds to the median diameter of the first deep hole. The annular countersunk hole and the first deep hole are connected together, that is, the annular countersunk hole and the first deep hole are also connected, so that the proximal end of the first countersunk hole on the rotor part can be connected with the first deep hole and the annular countersunk hole on the stator part. When the second through hole is aligned with the distal end of the first countersunk hole, the low-pressure circuit can be conducted, and the low-pressure return gas on the refrigerator can be guided from the second through hole to the distal end of the first countersunk hole, and then from the distal end to the proximal end, and finally flow to the first deep hole, and flow back from the first deep hole to the low-pressure return air port (first air port) of the compressor.

[0009] Preferably, the first sealing surface is evenly distributed with a plurality of grooves in an annular shape, and the grooves are arranged radially along the first sealing surface at the outer diameter position of the first sealing surface. The grooves on the first sealing surface are opened periodically during the rotation of the rotor part to reduce the high and low pressure difference of the system, reduce the irreversible loss caused by the sudden change of pressure and the whistling sound caused by the high-speed airflow.

[0010] Preferably, a fluid auxiliary through hole is provided on the second sealing surface, and the fluid auxiliary through hole penetrates the stator part axially. When the rotor part rotates to a certain angle, the fluid auxiliary through hole will overlap with the first counterbore and the second counterbore, that is, the corresponding flow channel is opened. By designing the shape of the fluid auxiliary through hole to control its opening angle and the opening sequence relative to other areas, the pressure waveform and phase angle in the refrigerator are adjusted and the efficiency of the refrigerator is improved.

[0011] Preferably, the second through hole is provided with a third countersunk hole at one end close to the second sealing surface, and the fluid auxiliary through hole is provided with a fourth countersunk hole at one end close to the second sealing surface. The third countersunk hole and the fourth countersunk hole can increase the opening angle of the alternating fluid outlet, extend the opening and closing time, increase the buffer area, and reduce the irreversible loss caused by the sudden change of pressure.

[0012] Preferably, a fixing hole is provided on the side of the rotor part away from the first sealing surface, and a through hole is further provided in the fixing hole. The fixing hole is used to connect the rotor part and the rotating shaft together, and the through hole can dissipate the heat generated between the rotor part and the rotating shaft in time to ensure that the temperature between the rotor part and the rotating shaft is normal, and avoid the temperature of the rotor part rising, heating the airflow in the countersunk hole, and reducing the refrigeration efficiency of the refrigeration system.

[0013] A refrigerator includes the above-mentioned flow field conversion mechanism and a compressor, wherein the compressor includes a first air port and a second air port, and the refrigerator includes a gas port, wherein the first air port is connected to the first deep hole, the second air port is connected to the first direct current through hole, and the gas port is connected to the second through hole. The first air port is a port for low-pressure gas to flow back into the compressor, and the second air port is a port for high-pressure gas in the compressor to enter the first direct current through hole of the stator. The gas port is a port for gas exchange between the refrigerator and the rotor.

[0014] Preferably, the stator part is provided with a fixing groove in the circumferential direction, and the fixing groove is provided with a connecting hole connected to the first deep hole in the radial direction, and the connecting hole is also connected to the first gas port. The fixing groove can fix the stator part on the compressor, so that the low-pressure reflux gas flows back into the compressor for compression and air replenishment.

[0015] Compared with the prior art, the beneficial effects of the present invention are: (1) it can realize the efficient conversion of direct current flow field into alternating flow field, and reduce the irreversible loss generated in the process of flow field pressure switching under the premise of ensuring that the flow area is not reduced; (2) it can adjust the pressure waveform and phase angle in the refrigerator and improve the efficiency of the refrigerator; (3) it effectively expands the angle range of opening and closing of each channel, prolongs the opening and closing time, and can realize precise control of the alternating flow pressure waveform and wavelength; (4) by designing the number and symmetry of special-shaped holes, it effectively increases the frequency range of the alternating pressure waveform under the motor limited frequency, and can realize precise control of the pressure wave frequency; (5) by designing the countersunk hole of the special-shaped channel, it effectively increases the buffer space of the pressure area, reduces the pressure change rate, reduces the irreversible loss, and improves the refrigeration efficiency of the refrigerator. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the coordination between the stator part and the rotor part of the present invention, and also a schematic diagram of the high-pressure gas circuit opening state;

[0017] Figure 2 This is an axonometric view of the rotor portion of the present invention;

[0018] Figure 3 is a top view of the rotor portion of the present invention;

[0019] Figure 4 for Figure 3Section view in the AA direction;

[0020] Figure 5 for Figure 3 Cross-sectional view in the middle BB direction;

[0021] Figure 6 This is an axonometric view of the stator portion of the present invention;

[0022] Figure 7 A top view of the stator portion of the present invention;

[0023] Figure 8 for Figure 7 Cross-sectional view in CC direction;

[0024] Fig. 9 for Figure 7 Cross-sectional view in the middle DD direction;

[0025] Fig.10 This is a schematic diagram of the opening of the low-pressure circuit of the present invention.

[0026] In the figure: 1. rotor part, 1.1. first sealing surface, 2. stator part, 2.1. second sealing surface, 3. first countersunk hole, 3.1. proximal end, 3.2. distal end, 3.3. recess, 4. second countersunk hole, 5. first direct current countersunk hole, 6. first deep hole, 7. second through hole, 8. first direct current through hole, 9. annular countersunk hole, 10. groove, 11. fluid auxiliary through hole, 12. third countersunk hole, 13. fourth countersunk hole, 14. fixing hole, 15. through hole, 16. fixing groove, 17. connecting hole. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0028] Example 1: Figures 1 to 9 A flow field conversion mechanism shown includes a rotor part 1 and a stator part 2. The rotor part 1 and the stator part 2 are both cylindrical structures. One end face of the rotor part 1 and one end face of the stator part 2 are sealed and fitted together, and the rotor part 1 can also rotate relative to the stator part 2. A plurality of countersunk hole structures are provided on the rotor part 1, and a plurality of through hole structures are provided on the stator part 2. After direct current gas is introduced into the stator part 2, the rotation of the rotor part 1 causes the hole structures on the rotor part 1 and the hole structures on the stator part 2 to overlap and stagger periodically, so that the direct current gas is periodically switched on and off, and finally the direct current gas can be converted into a periodic alternating airflow and input into the refrigerator, providing the refrigerator with an alternating flow field environment required for refrigeration.

[0029] Specifically, one end of the rotor part 1 is a first sealing surface 1.1, which is a circular surface. The first sealing surface 1.1 is provided with three hole structures: a first countersunk hole 3, a second countersunk hole 4 and a first direct current countersunk hole 5. The first direct current countersunk hole 5 is arranged at the center of the rotor part 1 and along the axial direction of the rotor part 1. The first countersunk hole 3 is arranged on one side of the first direct current countersunk hole 5, such as Figure 3 As shown, two groups of first countersunk holes 3 are provided, and the two groups of first countersunk holes 3 are symmetrically distributed about the first direct current countersunk hole 5 (or uniformly distributed along the circumference of the first sealing surface 1.1), and the first countersunk holes 3 are special-shaped holes, and the cross-sectional length of the first countersunk holes 3 is along the radial direction of the first sealing surface 1.1, and the first countersunk holes 3 include a proximal end 3.1 and a distal end 3.2; that is, one end of the first countersunk hole 3 is close to the position of the first direct current countersunk hole 5, but is not connected to the first direct current countersunk hole 5, and the other end of the first countersunk hole 3 is close to the outer diameter position of the first sealing surface 1.1, the two sides of the first countersunk hole 3 are straight lines, the side of the proximal end 3.1 of the first countersunk hole 3 is a curve, and the distal end 3.2 of the first countersunk hole 3 is a curve. The edge is a curve; specifically, the proximal end 3.1 and the distal end 3.2 of the first countersunk hole 3 are connected together, and the countersunk hole at the proximal end 3.1 and the countersunk hole at the distal end 3.2 together form the first countersunk hole 3, and the cross-sectional shape of the countersunk hole at the proximal end 3.1 is a shape in which the inner diameter side is smaller than the outer diameter side, and the cross-sectional shape of the countersunk hole at the distal end 3.2 is a shape in which the inner diameter side is smaller than the outer diameter side. In addition, the outer diameter size of the proximal end 3.1 is larger than the inner diameter size of the distal end 3.2, so that a recessed portion 3.3 structure is formed between the proximal end 3.1 and the distal end 3.2. The proximal end 3.1 and the distal end 3.2 of the first countersunk hole 3 are connected by an arc surface transition, which can effectively reduce the stress concentration in the first countersunk hole 3. Two groups of second countersunk holes 4 are also provided. The second countersunk holes 4 are arranged near the outer diameter of the first sealing surface 1.1. The two groups of second countersunk holes 4 are also symmetrically distributed about the first direct current countersunk hole 5 (or evenly distributed along the circumference of the first sealing surface 1.1). The two sides of the second countersunk holes 4 are straight lines, and the inner diameter side of the second countersunk holes 4 and the outer diameter side of the second countersunk holes 4 are curves. In addition, the outer diameter side size of the second countersunk holes 4 is larger than the inner diameter side size of the second countersunk holes 4. Overall, the cross-sectional shape of the second countersunk holes 4 is adapted to the cross-sectional size of the distal end 3.2 of the first countersunk hole 3, and the radial position of the second countersunk holes 4 on the first sealing surface 1.1 is the same as the radial position of the distal end 3.2 of the first countersunk hole 3 on the first sealing surface 1.1, that is, the distal end 3.2 of the first countersunk hole 3 and the second countersunk hole 4 can be considered to be on the same circular ring. The first countersunk holes 3 and the second countersunk holes 4 are arranged alternately, and the interval angle between the first countersunk holes 3 and the second countersunk holes 4 is 90°.

[0030] It can be understood that since the cross-sectional shape of the countersunk hole at the distal end 3.2 is a shape in which the inner diameter side is smaller than the outer diameter side, when the airflow at the distal end 3.2 flows to the proximal end 3.1, it can guide and accelerate the airflow, and when the airflow enters the proximal end 3.1 from the recessed portion 3.3, the space gradually becomes larger and the airflow slows down, which is beneficial to the circulation of the airflow and has the effect of reducing noise.

[0031] It should be noted that the number of the first countersunk holes 3 and the number of the second countersunk holes 4 are at least one group, and can also be three groups, four groups, or several groups. According to the different numbers, the rotor part 1 can realize different times of airflow input or output for each rotation of the rotor part 1, that is, the frequency of the airflow input or output of the rotor part 1 can be changed. Taking the two groups of first countersunk holes 3 and two groups of second countersunk holes 4 shown in the figure as an example, when the rotor part 1 rotates one circle, the first countersunk holes 3 and the second countersunk holes 4 can realize two airflow inputs and outputs, so that two high-pressure airflows can be provided for the refrigerator and two low-pressure airflow refluxes can be realized for the refrigerator. It should also be noted that the first countersunk holes 3 and the second countersunk holes 4 can be evenly distributed on the first sealing surface 1.1, or they can be unevenly distributed on the first sealing surface 1.1, so that the phase or timing of the input or output airflow can be adjusted.

[0032] In addition, the first direct current counterbore 5 is connected to the second counterbore 4. Specifically, the bottom of the first direct current counterbore 5 and the bottoms of the two second counterbores 4 are connected together, so that when airflow (high pressure airflow) is introduced into the first direct current counterbore 5, the airflow will further flow into the bottom position of the second counterbore 4, and then flow from the bottom of the second counterbore 4 to the orifice (first sealing surface 1.1) position of the second counterbore 4. When the second counterbore 4 on the rotor part 1 and the second through hole 7 on the stator part 2 rotate to overlap each other, the airflow in the second counterbore 4 will enter the second through hole 7, so that the stator part 2 can output alternating airflow.

[0033] Furthermore, the other end of the rotor part 1 needs to be connected to the rotating structure, that is, the end of the rotor part 1 away from the first sealing surface 1.1 needs to be connected to the driving device for driving the rotor part 1 to rotate. Specifically, a fixing hole 14 is provided at the end of the rotor part 1 away from the first sealing surface 1.1. The fixing hole 14 is arranged at the central axis position of the rotor part 1, and the fixing hole 14 is not connected to the first DC counterbore 5, and is in an independent and separated state; the fixing hole 14 is a stepped hole, and structures such as bearings and rotating shafts (not shown in the figure) can be placed in the fixing hole 14 to form a rotating fit with the rotor part 1. When the driving device is started, the rotating shaft can drive the rotor part 1 to rotate circumferentially, so that the rotor part 1 rotates relative to the stator part 2.

[0034] It should be noted that a through hole 15 is also provided in the fixing hole 14 of the rotor part 1. The through hole 15 is arranged inside the fixing hole 14, that is, the through hole 15 is on the side of the fixing hole 14 close to the first DC counterbore 5. The through hole 15 radially penetrates the rotor part 1, that is, the interior of the fixing hole 14 is connected to the outer peripheral surface of the rotor part 1 through the through hole 15. In this way, after the rotating shaft is fixed in the fixing hole 14, the generated heat can be dissipated through the through hole 15 in time, avoiding the rotor part 1 from generating more heat during the rotation process, causing the internal temperature of the rotor part 1 to increase, and then causing the airflow entering the rotor part 1 to be heated, thereby reducing the cooling efficiency of the refrigerator.

[0035] Specifically, one end of the stator part 2 is a second sealing surface 2.1. The second sealing surface 2.1 is circular like the first sealing surface 1.1, and the first sealing surface 1.1 and the second sealing surface 2.1 are the same size. The stator part 2 and the rotor part 1 are matched together through the first sealing surface 1.1 and the second sealing surface 2.1. Through the first sealing surface 1.1 and the second sealing surface 2.1, a certain degree of sealing can be achieved between the rotor part 1 and the stator part 2, avoiding gas leakage when air flow is generated between the rotor part 1 and the stator part 2, thereby ensuring the working efficiency of the refrigerator and the compressor.

[0036] The second sealing surface 2.1 is provided with a first direct current through hole 8, a first deep hole 6 and a second through hole 7. The first direct current through hole 8 is arranged at the central axis position of the stator part 2 and passes through the axial direction of the stator part 2. The first deep hole 6 is arranged beside the first direct current through hole 8, as shown in FIG. Figure 7 and Figure 8 As shown, there are two groups of first deep holes 6, which are also arranged along the axial direction of the stator part 2. One end of the first deep hole 6 extends to the surface of the second sealing surface 2.1, that is, one end of the first deep hole 6 is connected to the second sealing surface 2.1, and the other end of the first deep hole 6 is located at the end of the stator part 2 close to the stator part 2 away from the second sealing surface 2.1, and the other end of the first deep hole 6 does not penetrate the axial direction of the stator part 2. The hole cross section of the first deep hole 6 is an arc-shaped waist hole, and the two groups of first deep holes 6 are arranged symmetrically about the first direct current through hole 8 (or the two groups of first deep holes 6 are evenly arranged on the second sealing surface 2.1 in the circumferential direction, and the first direct current through hole 8 is the center of the circle); since the hole cross section of the two groups of first deep holes 6 is an arc-shaped waist hole, the two groups of first deep holes 6 will be located on the same circle after being arranged. The second through hole 7 is arranged near the outer diameter of the second sealing surface 2.1. The second through hole 7 is a cylindrical through hole. The second through hole 7 runs through the axial direction of the stator part 2, that is, the second through hole 7 is connected to both axial ends of the stator part 2.

[0037] In this way, the first direct current through hole 8, the first deep hole 6 and the second through hole 7 are arranged in sequence from the inner diameter to the outer diameter direction of the second sealing surface 2.1. There is a certain interval between the first direct current through hole 8, the first deep hole 6 and the second through hole 7, which can effectively prevent the airflow from flowing through different holes. In addition, the interval between the first deep hole 6 and the second through hole 7 is close to the structural size of the recess 3.3 of the first counterbore 3, which can also help reduce the leakage generated when the airflow enters the first deep hole 6 from the second through hole 7.

[0038] It should be noted that the first sealing surface 1.1 and the second sealing surface 2.1 can be matched together, and the sizes of the first sealing surface 1.1 and the second sealing surface 2.1 can be regarded as the same; therefore, on the first sealing surface 1.1 of the rotor part 1 and on the second sealing surface 2.1 of the stator part 2, the first DC countersunk hole 5 is located on the central axis of the first sealing surface 1.1, and the first DC through hole 8 is located on the central axis of the second sealing surface 2.1, so that the first DC countersunk hole 5 and the first DC through hole 8 are always in an aligned state; the distance from the proximal end 3.1 of the first countersunk hole 3 to the first DC countersunk hole 5 is the same as the distance from the first deep hole 6 to the first DC through hole 8, that is, when the rotor part 1 rotates relative to the stator part 2, the first countersunk hole 5 The proximal end 3.1 of the hole 3 can overlap with the first deep hole 6, and the inner and outer diameter size distance of the proximal end 3.1 of the first counterbore 3 is the same as the inner and outer diameter size distance of the first deep hole 6. When the proximal end 3.1 of the first counterbore 3 overlaps with the first deep hole 6, the fluidity of the airflow can be guaranteed; the distance from the distal end 3.2 of the first counterbore 3 to the first direct current counterbore 5, the distance from the second counterbore 4 to the first direct current counterbore 5, and the distance from the second through hole 7 to the first direct current through hole 8 are all equal, that is, when the rotor part 1 rotates relative to the stator part 2, the second through hole 7 on the stator part 2 can overlap with the distal end 3.2 of the first counterbore 3 and the second counterbore 4 on the rotor part 1, thereby realizing the opening and closing of the low-pressure circuit and the high-pressure gas circuit.

[0039] An annular counterbore 9 is also provided between the two groups of first deep holes 6. Figure 6 and Figure 7As shown, both ends of the annular countersunk hole 9 are connected to the end portions of the cross-section of the first deep hole 6 on both sides. The annular countersunk hole 9 is designed as a sinking hole on the second sealing surface 2.1. The depth of the annular countersunk hole 9 is much smaller than the depth of the first deep hole 6; the first deep hole 6 and the annular countersunk hole 9 form a complete circle; in addition, the radial width of the annular countersunk hole 9 is smaller than the radial width of the first deep hole 6. Specifically, the inner diameter edge of the annular countersunk hole 9 is located at the position of the middle diameter of the first deep hole 6, and the outer diameter edge of the annular countersunk hole 9 is aligned with the outer diameter edge of the first deep hole 6. This is not only conducive to ensuring the structural strength of the first direct current through hole 8 of the stator part 2, but also can connect the second through hole 7 and the first deep hole 6 at the first time when the second through hole 7 and the distal end 3.2 of the first countersunk hole 3 begin to align. That is to say, as long as the second through hole 7 and the first countersunk hole 3 have an overlapping portion, the second through hole 7 and the first deep hole 6 can be connected.

[0040] It should be noted that the circumferential dimension of the hole cross section of the second through hole 7 is smaller than the circumferential dimension of the hole cross section of the first deep hole 6. Therefore, the position of the second through hole 7 is preferably located in the same radial direction as the position of the first deep hole 6. Figure 7 As shown, the position of the second through hole 7 corresponds to the end position of the cross section of the first deep hole 6, so that the second through hole 7 and the first deep hole 6 can be rotated to the position of the first countersunk hole 3 at the same time, and when the second through hole 7 begins to overlap with the first countersunk hole 3, the first deep hole 6 also begins to overlap with the first countersunk hole 3, and the hole size of the first deep hole 6 is larger than the hole size of the annular countersunk hole 9, which can ensure sufficient flow area and ensure the reflux effect of the low-pressure airflow.

[0041] A third countersunk hole 12 is also provided at one end of the second through hole 7 on the stator part 2 close to the second sealing surface 2.1. The cross-sectional shape of the third countersunk hole 12 is the same as the cross-sectional shape of the second countersunk hole 4 and is larger than the radial dimension of the second through hole 7. That is to say, the third countersunk hole 12 is an arc-shaped waist hole as a whole. The second through hole 7 is located in the third countersunk hole 12. When the second countersunk hole 4 is rotated to overlap with the second through hole 7, the second countersunk hole 4 and the third countersunk hole 12 are aligned, so that the second through hole 7 is connected to the second countersunk hole 4.

[0042] A fluid-assisted through hole 11 is also provided on the stator part 2. The fluid-assisted through hole 11 is also a through hole. The fluid-assisted through hole 11 passes through the two axial ends of the stator part 2. The contour shape of the fluid-assisted through hole 11 can be designed to be circular, elliptical or other special shapes according to system requirements. In this embodiment, the shape of the fluid-assisted through hole 11 is circular; a fourth countersunk hole 13 is provided at one end of the fluid-assisted through hole 11 close to the second sealing surface 2.1. The fourth countersunk hole 13 is an arc-shaped waist hole. The fluid-assisted through hole 11 is located inside the fourth countersunk hole 13. The position of the fluid-assisted through hole 11 corresponds to the radial position of the second through hole 7, but the size of the fluid-assisted through hole 11 is smaller than the size of the second through hole 7; specifically, the outer diameter side of the fluid-assisted through hole 11 (fourth countersunk hole 13) is on the same circumference as the middle diameter position of the second through hole 7 (third countersunk hole 12), and the inner diameter side of the fluid-assisted through hole 11 (fourth countersunk hole 13) is on the same circumference as the inner diameter side of the second through hole 7 (third countersunk hole 12). Among them, the third countersunk hole 12 and the fourth countersunk hole 13 can increase the opening angle of the alternating fluid outlet, extend the opening and closing time, increase the buffer area, and reduce the irreversible loss caused by the sudden change of pressure. In addition, when the rotor part 1 rotates to a certain angle, the fluid auxiliary through hole 11 overlaps with the inner diameter side of the distal end 3.2 of the second countersunk hole 4 and the first countersunk hole 3 of the rotor part 1, that is, the corresponding high-pressure or low-pressure flow channel is opened. By designing the shape of the fluid auxiliary through hole 11 to control its opening angle and the timing of opening relative to other areas, the pressure waveform and phase angle in the refrigerator can be adjusted to improve the efficiency of the refrigerator. The hole depths of the annular countersunk hole 9, the third countersunk hole 12 and the fourth countersunk hole 13 can be designed to be the same, which is conducive to the processing operation of the countersunk holes.

[0043] Four groups of grooves 10 are arranged on the first sealing surface 1.1 of the rotor part 1. The grooves 10 are in the shape of long strips. The four groups of grooves 10 are evenly distributed along the circumferential ring of the first sealing surface 1.1 and are located at the outer diameter position of the first sealing surface 1.1. The length direction of the grooves 10 is along the radial direction of the first sealing surface 1.1. One end of the groove 10 is connected to the outer diameter of the first sealing surface 1.1, and the other end of the groove 10 extends to the position where the middle diameter of the second counterbore 4 is located. Figures 2 to 5 As shown, the first sealing surface 1.1 is a protruding plane of the end surface of the rotor part 1, that is, the first sealing surface 1.1 is higher than the external end surface as a whole, which is conducive to the arrangement of the groove 10. When the second through hole 7 rotates to the position of the groove 10, the outer diameter side of the second through hole 7 (third counterbore 12) will overlap and communicate with the inner diameter side of the groove 10, so that the airflow on the second through hole 7 will flow along the groove 10 to the outside of the first sealing surface 1.1. The groove 10 opens periodically during the rotation of the rotor part 1 to reduce the high and low pressure difference of the system, reduce the irreversible loss caused by the sudden pressure change and the whistling sound generated by the high-speed airflow.

[0044] Similarly, since the number of the first countersunk holes 3 and the second countersunk holes 4 on the rotor part 1 can be designed according to actual needs, the number of the first deep holes 6 and the number of the second through holes 7 on the stator part 2 can also be designed according to actual needs; and the number of the first countersunk holes 3, the number of the second countersunk holes 4, the number of the first deep holes 6, and the number of the second through holes 7 on the rotor part 1 are independent of each other, which does not mean that the number of holes on the rotor part 1 must be the same as the number of corresponding holes on the stator part 2. For example, in the figure, the number of the first countersunk holes 3 is two groups, the number of the second countersunk holes 4 is two groups, the number of the first deep holes 6 is two groups, and the number of the second through holes 7 is also two groups; in addition, the number of the first countersunk holes 3 can be several groups, the number of the second countersunk holes 4 can be several groups, the number of the first deep holes 6 can be several groups, and the number of the second through holes 7 can be several groups, and they can be the same. It should be noted that when the second through hole 7 coincides with the second countersunk hole 4, a high-pressure airflow input can be provided for the refrigerator (realizing a high-pressure airflow output for the compressor), and when the second through hole 7 coincides with the distal end 3.2 of the first countersunk hole 3, the refrigerator can realize a low-pressure reflux output (the compressor performs a low-pressure reflux input).

[0045] Specifically, take the figure as an example (the number of the first countersunk holes 3 is two groups, the number of the second countersunk holes 4 is two groups, the number of the first deep holes 6 is two groups, and the number of the second through holes 7 is also two groups, and each type of hole is evenly distributed in an annular shape). Assuming that in the initial state (0° position), the second through hole 7 coincides with the second countersunk hole 4, at this time the refrigerator realizes the first input of high-pressure airflow, when the rotor part rotates 90°, the second through hole 7 coincides with the distal end 3.2 of the first countersunk hole 3, at this time the refrigerator realizes the first low-pressure gas output, when the rotor part rotates 180°, the second through hole 7 coincides with the second countersunk hole 4, at this time the refrigerator realizes the second input of high-pressure airflow, when the rotor part rotates 270°, the second through hole 7 coincides with the distal end 3.2 of the first countersunk hole 3, at this time the refrigerator realizes the second low-pressure gas output, and the rotor part 1 returns to the initial state (0° position) after rotating 360°; when the rotor part 1 rotates one circle, the compressor can realize two airflow inputs and outputs. The number of the first countersunk holes 3 and the number of the second countersunk holes 4 on the rotor part 1 determine the frequency of the alternating airflow input of the compressor. If only the number of the second through holes 7 is changed to one group, the above airflow input and output effects can also be achieved, but the input and output airflow will be reduced by half.

[0046] In addition, take another combination of hole numbers as an example (the number of first countersunk holes 3 is three groups, the number of second countersunk holes 4 is three groups, the number of first deep holes 6 is two groups, and the number of second through holes 7 is one group. For the convenience of explanation, all types of holes are evenly distributed in an annular shape). The first countersunk holes 3 and the second countersunk holes 4 are alternately spaced, the interval angle between the first countersunk holes 3 is 120°, the interval angle between the second countersunk holes 4 is 120°, and the angle between adjacent first countersunk holes 3 and second countersunk holes 4 is 60°; assuming that in the initial state (0° position), the second through hole 7 coincides with the second countersunk hole 4, at this time the refrigerator realizes the first high-pressure airflow input, when the rotor part 1 rotates 60°, the second through hole 7 coincides with the distal end 3.2 of the first countersunk hole 3, at this time the refrigerator realizes the first low-pressure gas output, and after rotating one circle in sequence, the compressor can realize three airflow inputs and outputs.

[0047] The above two different implementation methods of the number of holes show that the number of the first countersunk holes 3 and the number of the second countersunk holes 4 on the rotor part 1, the number of the first deep holes 6 and the number of the second through holes 7 on the stator part 2 are independent of each other, which does not mean that the number of holes on the rotor part 1 must be the same as the number of corresponding holes on the stator part 2. By alternately inputting high-pressure airflow and outputting low-pressure airflow in the refrigerator, an alternating flow field is provided to the refrigerator to improve the refrigeration efficiency of the refrigerator, and under the premise of ensuring that the flow area is not reduced, the irreversible loss generated during the flow field pressure switching process is reduced.

[0048] In addition, if Figure 6 , Figure 8 and Fig. 9 As shown, a fixed groove 16 is also provided in the circumferential direction of the stator part 2, and the position of the fixed groove 16 corresponds to the internal position of the first deep hole 6. A connecting hole 17 is provided between the first deep hole 6 and the fixed groove 16, and the low-pressure airflow in the first deep hole 6 can be reintroduced back into the compressor for compression through the connecting hole 17.

[0049] It should also be noted that the airflow direction of the present scheme is as follows: first, the high-pressure airflow is input from the first direct current through hole 8 at the end of the stator part 2 away from the second sealing surface 2.1. After the airflow is input from the first direct current through hole 8, it is output from the second sealing surface 2.1 and enters the first direct current countersunk hole 5 at the first sealing surface 1.1 of the rotor part 1, and then enters the internal position of the first direct current countersunk hole 5. Since the interior of the first direct current countersunk hole 5 is connected to the second countersunk hole 4, the airflow flows from the inside of the first direct current countersunk hole 5 to the position of the second countersunk hole 4; when the second countersunk hole 4 rotates to coincide with the position of the second through hole 7, the high-pressure airflow in the second countersunk hole 4 passes through the first sealing surface 1.1 and the second sealing surface 2.1 and then enters the second through hole 7, and then is output from the second through hole 7 at the end of the stator part 2 away from the second sealing surface 2.1 to the refrigerator for refrigeration operation. After the refrigerator is cooled, the low-pressure reflux gas generated will flow back from the second through hole 7, that is, the low-pressure airflow is input from the end of the second through hole 7 away from the second sealing surface 2.1. When the rotor part 1 rotates to the point where the distal end 3.2 of the first countersunk hole 3 coincides with the second through hole 7, the low-pressure airflow in the second through hole 7 passes through the second sealing surface 2.1 and the first sealing surface 1.1, and enters the distal end 3.2 of the first countersunk hole 3. Since the distal end 3.2 and the proximal end 3.1 are connected, the low-pressure airflow enters the proximal end 3.1 from the distal end 3.2 of the first countersunk hole 3, and the proximal end 3.1 is connected to the annular countersunk hole 9 or the first deep hole 6 on the stator part 2, so that the low-pressure airflow enters the first deep hole 6 from the proximal end 3.1, and finally is output from the connecting hole 17 of the first deep hole 6 into the low-pressure reflux port of the compressor.

[0050] Embodiment 2: A refrigerator comprises a flow field conversion mechanism in Embodiment 1. The flow field conversion mechanism serves as an intermediate structure between the refrigerator and the compressor, realizes the airflow exchange between the refrigerator and the compressor, and converts the direct current airflow into alternating airflow to supply the refrigerator.

[0051] Specifically, the refrigerator includes a gas port, which is the high-pressure airflow input port of the refrigerator and also the low-pressure airflow output port of the refrigerator; the compressor includes a first gas port and a second gas port, the first gas port is the port for low-pressure gas to flow back into the compressor, and the second gas port is the port for high-pressure gas in the compressor to enter the first direct current through hole 8 of the stator part 2. That is, the fixed groove 16 on the stator part 2 is fixed to the compressor, and the first gas port of the compressor is connected to the connecting hole 17 on the fixed groove 16, and the first gas port of the compressor is also connected to the first deep hole 6; the second gas port of the compressor is connected to the first direct current through hole 8 at one end of the stator part 2 away from the second sealing surface 2.1; the gas port of the refrigerator is connected to the second through hole 7 of the stator part 2 at one end away from the second sealing surface 2.1.

[0052] After the compressor compresses the gas, a high-pressure airflow is formed and output from the second air port of the compressor. Then, the high-pressure airflow is input from the first direct current through hole 8 at the end of the stator part 2 away from the second sealing surface 2.1. After the airflow is input from the first direct current through hole 8, it is output from the second sealing surface 2.1 and enters the first direct current counterbore 5 at the first sealing surface 1.1 of the rotor part 1, and then enters the internal position of the first direct current counterbore 5. Since the interior of the first direct current counterbore 5 is connected with the second counterbore 4, the airflow flows from the interior of the first direct current counterbore 5 to the position of the second counterbore 4; when the second counterbore 4 rotates to coincide with the position of the second through hole 7, the high-pressure airflow in the second counterbore 4 passes through the first sealing surface 1.1 and the second sealing surface 2.1 and then enters the second through hole 7 at the end of the stator part 2 away from the second sealing surface 2.1 to the gas port of the refrigerator, and the high-pressure airflow is reduced in pressure in the refrigerator, thereby performing heat absorption and refrigeration operation. After the refrigerator cools, the generated low-pressure reflux gas is discharged from the gas port of the refrigerator, and the low-pressure airflow enters the second through hole 7 and refluxes again, that is, the low-pressure airflow is input from the end of the second through hole 7 away from the second sealing surface 2.1. When the rotor part 1 rotates to the point where the distal end 3.2 of the first counterbore 3 coincides with the second through hole 7, the low-pressure airflow in the second through hole 7 passes through the second sealing surface 2.1 and the first sealing surface 1.1, and then enters the distal end 3.2 of the first counterbore 3. 2 and the proximal end 3.1 are connected, so the low-pressure airflow enters the proximal end 3.1 from the distal end 3.2 of the first counterbore 3, and the proximal end 3.1 is connected with the annular counterbore 9 or the first deep hole 6 on the stator part 2, so that the low-pressure airflow enters the first deep hole 6 from the proximal end 3.1, and finally outputs from the connecting hole 17 of the first deep hole 6 to the first air port of the compressor, thereby flowing back to the interior of the compressor for compression, forming a high-pressure airflow again, and repeating the above process.

Claims

1. A flow field conversion mechanism, characterized in that: It includes a rotor part and a stator part. The rotor part is provided with a first countersunk hole and a second countersunk hole which are distributed in an annular manner, the radial dimension of the first countersunk hole is larger than the radial dimension of the second countersunk hole, and the center of the rotor part is provided with a first direct current countersunk hole which is connected with the second countersunk hole; The stator part is provided with a first deep hole and a second through hole, the position of the first deep hole corresponds to the proximal end position of the first countersunk hole, the position of the second through hole corresponds to the radial position of the second countersunk hole, and the stator part is also provided with a first direct current through hole adapted to the first direct current countersunk hole; The distance from the distal end of the first counterbore to the first DC counterbore is equal to the distance from the second through hole to the first DC through hole. The rotor part rotates relative to the stator part, and the hole structure on the rotor part and the hole structure on the stator part are periodically overlapped and staggered.

2. A flow field conversion mechanism according to claim 1, characterized in that: The rotor part includes a first sealing surface, the first countersunk hole, the second countersunk hole and the first DC countersunk hole are all arranged on the first sealing surface, the stator part includes a second sealing surface, the first deep hole, the second through hole and the first DC through hole are all connected to the second sealing surface, and the first sealing surface and the second sealing surface are rotatably matched.

3. A flow field conversion mechanism according to claim 2, characterized in that: The first counterbore includes a proximal end and a distal end, the proximal end is connected to the distal end, the position of the proximal end corresponds to the position of the first deep hole, and the position of the distal end corresponds to the radial position of the second counterbore and the radial position of the second through hole.

4. A flow field conversion mechanism according to claim 1, characterized in that: An annular countersink is provided in the circumference of the first deep hole, the outer diameter of the annular countersink corresponds to the outer diameter of the first deep hole, and the inner diameter of the annular countersink corresponds to the median diameter of the first deep hole.

5. A flow field conversion mechanism according to claim 2 or 3, characterized in that: The first sealing surface is annularly and evenly distributed with a plurality of grooves, and the grooves are radially arranged at the outer diameter position of the first sealing surface along the first sealing surface.

6. A flow field conversion mechanism according to claim 2 or 3, characterized in that: The second sealing surface is provided with a fluid auxiliary through hole, and the fluid auxiliary through hole penetrates the stator part in the axial direction.

7. A flow field conversion mechanism according to claim 6, characterized in that: A third countersunk hole is disposed at one end of the second through hole close to the second sealing surface, and a fourth countersunk hole is disposed at one end of the fluid auxiliary through hole close to the second sealing surface.

8. A flow field conversion mechanism according to claim 2 or 3, characterized in that: A fixing hole is provided on a side of the rotor part away from the first sealing surface, and a through hole is also provided in the fixing hole.

9. A refrigerator, characterized in that: A flow field transformation mechanism comprising any one of claims 1 to 8, further comprising a compressor, the compressor comprising a first air port and a second air port, the refrigerator comprising a gas port, the first air port being connected to the first deep hole, the second air port being connected to the first direct current through hole, and the gas port being connected to the second through hole.

10. A refrigerator according to claim 9, characterized in that: The stator part is provided with a fixing groove in the circumferential direction, and the fixing groove is provided with a communicating hole in the radial direction that communicates with the first deep hole, and the communicating hole is also communicated with the first air port.

Images