Noise reduction box structure, pump body noise reduction assembly and cold storage equipment

Abstract

The utility model provides a noise reduction box structure, a pump body noise reduction assembly and cold storage equipment. The noise reduction box structure comprises a box body, an air suction main pipe, an air suction branch pipe and an exhaust pipe. The exhaust pipe is located in the box body and can exhaust air out of the box body. Part of the air suction main pipe penetrates out of the box body. The air suction branch pipe is communicated with the air suction main pipe and located in the box body. According to the arrangement, the air suction branch pipe is arranged in the box main body to suck air in the box main body, so that the interior of the box main body is in a vacuum environment, noise transmission is weakened, and the mute effect of the noise reduction box structure is further improved.

Description

Technical Field

[0001] The present application relates to the field of refrigeration, and in particular to a noise reduction box structure, a pump body noise reduction assembly, and cold storage equipment. Background Art

[0002] With the rapid development of industrial technology and the improvement of people's quality of life, there are higher requirements for the all-round performance of cold storage equipment such as refrigerators. The quiet performance of cold storage equipment and the storage quality of food are the key aspects that customers pay attention to. In order to improve the food storage quality of cold storage equipment, manufacturers usually add vacuum pumps to the cold storage equipment and vacuum the storage drawers to make the food in a vacuum storage environment, thereby improving the storage quality of food. However, the operation noise of the vacuum pump is relatively high, which affects the overall quietness of the cold storage equipment, and then affects people's experience of use, thereby reducing market competitiveness.

[0003] Therefore, it is necessary to provide an improved noise reduction box structure to solve some or all of the above problems. Utility Model Content

[0004] The present application provides a noise reduction box structure, a pump body noise reduction assembly and cold storage equipment with good silencing effect.

[0005] The present application provides a noise reduction box structure, comprising a box body, an air intake main pipe, an air intake branch pipe and an exhaust pipe; the exhaust pipe is located in the box body and can exhaust air to the outside of the box body; part of the air intake main pipe passes through the box body; the air intake branch pipe is connected to the air intake main pipe, and the air intake branch pipe is located in the box body.

[0006] Furthermore, it also includes a central connection box arranged in the box body; the central connection box is provided with a first through cavity and a second through cavity that are connected to each other; part of the air intake main pipe is located in the first through cavity, and at least part of the air intake branch pipe is located in the second through cavity.

[0007] Furthermore, the middle box is provided with an air cavity and an external exhaust pipe; the air cavity is isolated from the first through cavity and the second through cavity; the exhaust pipe is connected to the middle box and communicated with the air cavity; the external exhaust pipe passes through the side wall of the middle box and the box body and communicates with the air cavity.

[0008] Furthermore, it also includes a check valve; the check valve is arranged at one end of the suction branch pipe away from the suction main pipe.

[0009] Furthermore, it also includes a valve controller; the valve controller is sleeved on one end of the air suction main pipe located outside the box body.

[0010] Further, the box body includes a through hole and a sealing ring; the main suction pipe passes through the through hole, the sealing ring is arranged around the through hole, and is attached between the middle connection box and the box body.

[0011] Further, the box body includes a connected upper box cover and a lower box body; the upper box cover is provided with a sealing groove, the through hole is arranged on the upper box cover, and part of the sealing ring is located in the sealing groove; the middle connection box is connected to the upper box cover.

[0012] Further, the middle connection box includes a sealing box cover, an installation box body and a connecting flange; the sealing ring is attached between the upper box cover and the sealing box cover; the connecting flange is arranged on the installation box body, and the connecting flange is connected to the upper box cover.

[0013] The present application also provides a pump body noise reduction assembly, including a vacuum pump, a first connecting pipe, a second connecting pipe and the noise reduction box structure as described above; the vacuum pump is fixed in the box body, and two ends of the first connecting pipe are respectively connected to the main suction pipe and the air inlet of the vacuum pump; two ends of the second connecting pipe are respectively connected to the exhaust pipe and the air outlet of the vacuum pump.

[0014] The present application also provides a cold storage device, including a drawer and the pump body noise reduction assembly as described above, the pump body noise reduction assembly is connected to the drawer, and the vacuum pump is used to extract the air in the drawer.

[0015] Compared with the prior art, the noise reduction box structure of the present application sets a suction branch pipe in the box body to suck the air in the box body, so that the inside of the box body is in a vacuum environment, weakening the propagation of noise, and thus improving the sound insulation effect of the noise reduction box structure. And when the vacuum pump is arranged in the box body, the noise generated by the operation of the vacuum pump can be greatly reduced, improving the quietness during the operation of the vacuum pump.

[0016] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with this specification, and are used together with the specification to explain the principles of this specification.

[0018] Figure 1 is a perspective view of the pump body noise reduction assembly of the present application.

[0019] Figure 2 is a partial sectional schematic view of the pump body noise reduction assembly of the present application.

[0020] Figure 3It is a partial sectional view schematic diagram of another perspective of the pump body noise reduction assembly of this application.

[0021] Figure 4 It is Figure 1 The three-dimensional view of the upper box cover in the middle.

[0022] Figure 5 It is Figure 1 The three-dimensional view of the middle and lower box body.

[0023] Figure 6 It is the three-dimensional view of the box main body of this application after removing the upper box cover and the lower box body.

[0024] Figure 7 It is Figure 6 The three-dimensional view of another perspective of the middle box main body after removing the upper box cover and the lower box body.

[0025] Figure 8 It is Figure 6 The three-dimensional view of the middle part after removing the installation box body and the exhaust pipe.

[0026] Figure 9 It is Figure 6 The three-dimensional view of the middle part after removing the sealing box cover and the suction main pipe.

[0027] Figure 10 It is Figure 9 The three-dimensional view of the middle part after removing the suction branch pipe and the outer exhaust pipe.

[0028] Figure 11 It is Figure 1 The three-dimensional view of the pump body noise reduction assembly in the middle after removing the upper box cover and the lower box body.

[0029] Figure 12 It is Figure 11 The three-dimensional view of the middle part after removing the installation box body and the exhaust pipe.

[0030] Explanation of the reference numerals in the drawings: 1 - box main body; 11 - through hole; 12 - sealing ring; 13 - upper box cover; 131 - sealing groove; 132 - first fitting surface; 133 - engaging convex edge; 14 - lower box body; 141 - second fitting surface; 142 - engaging groove; 2 - suction main pipe; 21 - upper connecting pipe; 22 - middle connecting pipe; 23 - lower connecting pipe; 3 - suction branch pipe; 4 - exhaust pipe; 5 - middle connecting box; 51 - first through cavity; 52 - second through cavity; 53 - air cavity; 54 - outer exhaust pipe; 55 - sealing box cover; 56 - installation box body; 57 - connecting flange; 58 - assembly block; 59 - fixing block; 6 - check valve; 7 - valve controller; 8 - vacuum pump; 9 - first connecting pipe; 10 - second connecting pipe. Detailed implementation manners

[0031] Here, in conjunction with the accompanying drawings, the technical solutions in the embodiments (or "implementation manners") of the present application will be clearly and completely described. When the following description involves the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0032] If there are terms related to directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, lateral, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movement conditions between components in a certain specific posture (as shown in the accompanying drawings); if this specific posture changes, then the directional indication or positional relationship also changes accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only for the purpose of convenient description and cannot be understood as indicating or implying relative importance.

[0033] As Figures 1 to 3 shown, the noise reduction box structure of the present application includes a box body 1, an air suction main pipe 2, an air suction branch pipe 3, an exhaust pipe 4, an intermediate connection box 5, a check valve 6, and a valve controller 7. Part of the air suction main pipe 2 penetrates out of the box body 1, and external gas can flow into the box body 1 through the air suction main pipe 2. The air suction branch pipe 3 is communicated with the air suction main pipe 2, and the air suction branch pipe 3 is located inside the box body 1. The air suction branch pipe 3 is used to suck the air in the cavity of the box body 1, so that the inside of the box body 1 is in a vacuum environment, weakening the propagation of noise inside the box body 1, and thus improving the sound insulation effect of the noise reduction box structure. The exhaust pipe 4 is located inside the box body 1 and can exhaust to the outside of the box body 1.

[0034] Further in conjunction with Figure 4 and Figure 5 shown, in some embodiments, the box body 1 includes a through hole 11, a sealing ring 12, an upper box cover 13, and a lower box body 14. The air suction main pipe 2 passes through the through hole 11 and is located outside the box body 1. The through hole 11 is in a gourd shape, so that when the air suction main pipe 2 passes through the through hole 11, there is a corresponding adjustment space, improving the convenience of the cooperation between the air suction main pipe 2 and the box body 1.

[0035] The intermediate connection box 5 is located inside the box body 1. The sealing ring 12 is attached between the intermediate connection box 5 and the box body 1, and the sealing ring 12 is arranged around the through hole 11. With such a setting, it is avoided that the gas inside the box body 1 communicates with the external environment through the through hole 11, affecting the vacuum environment inside the box body 1, and thus improving the noise reduction effect of the box body 1 and further improving the quietness of the box body 1. At the same time, by using the sealing ring 12 to seal the through hole 11, the convenience of assembling the noise reduction box structure can also be improved.

[0036] In some other embodiments, to reduce the manufacturing cost of the noise reduction box structure, the middle connection box 5 and the box body 1 can be glued to seal the through hole 11, thereby preventing the internal gas of the box body 1 from exchanging with the external gas.

[0037] In some embodiments, the upper box cover 13 is connected to the lower box body 14, and the upper box cover 13 and the lower box body 14 form a receiving cavity. Part of the main suction pipe 2, the suction branch pipe 3, the exhaust pipe 4, the middle connection box 5, the check valve 6, and the valve controller 7 are all located in this receiving cavity. To improve the sealing performance between the upper box cover 13 and the lower box body 14, the upper box cover 13 and the lower box body 14 are connected by snap fit.

[0038] Specifically, the upper box cover 13 includes a first fitting surface 132 and a snap-fit convex edge 133 protruding from the first fitting surface 132. The snap-fit convex edge 133 is preferably located in the middle region of the first fitting surface 132, and the snap-fit convex edge 133 is arranged in a surrounding manner on the first fitting surface 132. The lower box body 14 includes a second fitting surface 141 and a snap-fit groove 142 recessed from the second fitting surface 141. The snap-fit groove 142 is preferably located in the middle region of the second fitting surface 141, and is correspondingly arranged with the snap-fit convex edge 133. The snap-fit groove 142 is arranged in a surrounding manner on the second fitting surface 141.

[0039] When the upper box cover 13 is connected to the lower box body 14, the first fitting surface 132 and the second fitting surface 141 are mutually attached, and the snap-fit convex edge 133 is located in the snap-fit groove 142. To further improve the sealing performance between the upper box cover 13 and the lower box body 14, sealant can be applied between the first fitting surface 132 and the second fitting surface 141, and between the snap-fit convex edge 133 and the snap-fit groove 142.

[0040] In some other embodiments, the upper box cover 13 can also be provided with a snap-fit groove recessed from the first fitting surface, and the lower box body 14 is provided with a snap-fit convex edge protruding from the second fitting surface, and the snap-fit groove and the snap-fit convex edge cooperate with each other.

[0041] It should be noted that the fitting end faces between the upper box cover 13 and the lower box body 14 can also be flat straight faces, and a sealing ring is arranged between the upper box cover 13 and the lower box body 14 to increase the internal sealing performance of the box body 1. The upper box cover 13 and the lower box body 14 can be fixed by means such as adhesion, screwing, snap connection, welding, etc., which will not be elaborated here.

[0042] In some embodiments, the through hole 11 is provided on the upper box cover 13, and the upper box cover 13 is provided with a sealing groove 131. The sealing groove 131 is arranged around the through hole 11, and part of the sealing ring 12 is arranged in the sealing groove 131. With this arrangement, the convenience of assembling the sealing ring 12 is improved, and at the same time, the sealing ring 12 is installed more firmly. The middle connection box 5 is connected to the upper box cover 13 and is attached to the upper box cover 13 through the sealing ring 12. The main suction pipe 2 passes through the upper box cover 13 through the through hole 11.

[0043] In some other embodiments, the through hole 11 is provided in the lower box body 14, and the lower box body 14 is provided with a sealing groove (not shown). The sealing groove is provided around the through hole 11, and a part of the sealing ring 12 is provided in the sealing groove. The intermediate connection box 5 is connected to the lower box body 14, and is fitted with the lower box body 14 through the sealing ring 12. The air intake main pipe 2 passes through the lower box body 14 through the through hole 11.

[0044] Further integration Figures 6 to 10 As shown, in some embodiments, the air intake main pipe 2 is engaged with the middle connection box 5, and the two ends of the air intake main pipe 2 are respectively located outside the middle connection box 5. The air intake main pipe 2 includes an upper connecting pipe 21, a middle connecting pipe 22 and a lower connecting pipe 23. The middle connecting pipe 22 is connected between the upper connecting pipe 21 and the lower connecting pipe 23, and the outer diameter of the middle connecting pipe 22 is greater than the outer diameter of the upper connecting pipe 21 and the outer diameter of the lower connecting pipe 23. The middle connecting pipe 22 is engaged with the middle connection box 5.

[0045] The air intake branch pipe 3 passes through the middle connection box 5 and is connected to the air intake main pipe 2. Specifically, the air intake branch pipe 3 is connected to the middle connection pipe 22. The end of the air intake branch pipe 3 connected to the middle connection pipe 22 is provided with a thread and is screwed into the middle connection pipe 22. Such a configuration improves the stability between the air intake branch pipe 3 and the middle connection pipe 22 and reduces the possibility of gas leakage.

[0046] The air suction branch pipe 3 preferably protrudes out of the intermediate box 5, and the air suction branch pipe 3 can be connected to the inner cavity of the box body 1. This arrangement makes it easier for the air suction branch pipe 3 to absorb the gas in the inner cavity of the box body 1. Of course, the air suction branch pipe 3 can also be located in the intermediate box 5, and the air suction branch pipe 3 can be connected to the inner cavity of the box body 1.

[0047] In some embodiments, the intermediate box 5 is provided with a first through cavity 51, a second through cavity 52, an air cavity 53, an external exhaust pipe 54, a sealing box cover 55, an installation box body 56, a connecting flange 57, an assembly block 58 and a fixing block 59. The first through cavity 51 is connected to the second through cavity 52, part of the air intake main pipe 2 is located in the first through cavity 51, and at least part of the air intake branch pipe 3 is located in the second through cavity 52.

[0048] Furthermore, the middle connecting pipe 22 is engaged in the first through cavity 51, and the upper connecting pipe 21 and the lower connecting pipe 23 are both located outside the first through cavity 51. The middle connecting pipe 22 is arranged in the first through cavity 51, so that the middle connecting box 5 wraps the middle connecting pipe 22, and when the gas passes through the middle connecting pipe 22, the propagation of the noise when the gas flows can be blocked, thereby improving the silent effect when the air intake main pipe 2 extracts the gas. The air intake branch pipe 3 can be located entirely or partially in the second through cavity 52.

[0049] The air cavity 53 is isolated from the first through cavity 51 and the second through cavity 52. ​​The exhaust pipe 4 is connected to the intermediate box 5 and communicates with the air cavity 53. Specifically, the exhaust pipe 4 is tightly clamped to the bottom plate of the intermediate box 5, and part of the exhaust pipe 4 is located in the air cavity 53. The external exhaust pipe 54 penetrates the side wall of the intermediate box 5 and the box body 1, and communicates with the air cavity 53. The exhaust pipe 4, the air cavity 53 and the external exhaust pipe 54 are communicated in sequence.

[0050] The air cavity 53 is sealed except for being connected to the exhaust pipe 4 and the external exhaust pipe 54. The gas exhausted from the exhaust pipe 4 first enters the air cavity 53, and then the excess gas in the air cavity 53 is exhausted to the outside of the box body 1 through the external exhaust pipe 54. The air cavity 53 can be used to temporarily store gas.

[0051] The sealing box cover 55 is connected to the installation box body 56, and the upper connecting pipe 21 is tightly clamped to the sealing box cover 55. The sealing ring 12 is fitted between the sealing box cover 55 and the upper box cover 13. The air cavity 53 is located in the installation box body 56. After the sealing box cover 55 is covered on the installation box body 56, the air cavity 53 is sealed. The exhaust pipe 4 is clamped to the bottom of the installation box body 56.

[0052] In order to improve the sealing performance between the sealing box cover 55 and the mounting box body 56, the intermediate box 5 includes a sealing member (not shown), which is located between the sealing box cover 55 and the mounting box body 56. Of course, in order to reduce the manufacturing cost, a sealant can also be applied between the sealing box cover 55 and the mounting box body 56, and the sealing box cover 55 and the mounting box body 56 are bonded while the mounting box body 56 and the sealing box cover 55 are sealed.

[0053] In some other embodiments, the sealing box cover 55 is connected by snapping with the installation box body 56. Specifically, the sealing box cover 55 includes a third fitting surface (not shown) and a slot (not shown) recessed from the third fitting surface. The installation box body 56 includes a fourth fitting surface (not shown) and a convex edge (not shown) protruding from the fourth fitting surface. When the sealing box cover 55 is connected to the installation box body 56, the third fitting surface and the fourth fitting surface fit each other, and the convex edge is located in the slot. In order to further improve the sealing between the sealing box cover 55 and the installation box body 56, a sealant can be applied between the third fitting surface and the fourth fitting surface and between the convex edge and the slot.

[0054] In some other embodiments, the sealing box cover 55 may also be provided with a convex edge protruding from the third fitting surface, and the mounting box body 56 may be provided with a slot recessed from the fourth fitting surface, and the slot and the convex edge cooperate with each other.

[0055] The sealing box cover 55 and the mounting box body 56 can be fixed by bonding, screwing, clamping, welding, etc., which will not be described in detail herein.

[0056] In some embodiments, the connection flange 57 is provided on the mounting box body 56, and the connection flange 57 is connected to the upper box cover 13 by fasteners. In this way, the fastening force applied to the connection flange 57 by the fasteners increases the tightness of the fit between the sealed box cover 55 and the mounting box body 56, and between the sealed box cover 55 and the upper box cover 13. Of course, the connection flange 57 can also be provided on the sealed box cover 55 and connected to the upper box cover 13 by fasteners.

[0057] The assembly block 58 is protruded from the bottom of the air cavity 53 and does not extend beyond the mounting box body 56. Along the direction from the sealing box cover 55 to the mounting box body 56, the first through cavity 51 penetrates the assembly block 58, and the second through cavity 52 penetrates from the side of the mounting box body 56 to the first through cavity 51. The fixing block 59 is located at the bottom of the air cavity 53, and part of the external exhaust pipe 54 is arranged on the fixing block 59.

[0058] The check valve 6 is arranged at one end of the air suction branch pipe 3 away from the air suction main pipe 2. The check valve 6 is used to prevent the gas from flowing back in the air suction branch pipe 3. Specifically, when the gas inside the box body 1 enters the air suction branch pipe 3, the check valve 6 opens, and when the air suction branch pipe 3 is about to flow back into the box body 1, the check valve 6 closes.

[0059] The valve controller 7 is sleeved on one end of the air intake main pipe 2 located outside the box body 1. Specifically, the valve controller 7 is located outside the box body 1 and sleeved on the upper connecting pipe 21. The valve controller 7 is used to control the opening and closing of the air intake main pipe 2. When the check valve 6 is opened, the valve controller 7 controls the air intake main pipe 2 to close.

[0060] The noise reduction box structure of the present application is provided with an air intake branch pipe 3 in the box body 1 to absorb the air in the box body 1, so that the interior of the box body 1 is in a vacuum environment, thereby reducing the propagation of noise, and thus effectively improving the mute effect of the noise reduction box structure.

[0061] The present application also provides a pump body noise reduction assembly. Figure 11 and Figure 12 As shown, the pump body noise reduction assembly includes a vacuum pump 8, a first connecting pipe 9, a second connecting pipe 10, and the noise reduction box structure as described above. The vacuum pump 8 is fixed in the box body 1, and the two ends of the first connecting pipe 9 are respectively connected to the suction main pipe 2 and the air inlet of the vacuum pump 8. Specifically, one end of the first connecting pipe 9 is connected to the lower connecting pipe 23, and the other end is connected to the air inlet of the vacuum pump 8.

[0062] The vacuum pump 8 can absorb the gas in the components outside the box body 1 through the suction main pipe 2, and can also absorb the gas in the box body 1 through the suction branch pipe 3, so that the interior of the box body 1 is in a vacuum state, thereby improving the mute effect of the noise reduction box structure.

[0063] Both ends of the second connecting pipe 10 are respectively connected to the exhaust pipe 4 and the air outlet of the vacuum pump 8. The air sucked by the vacuum pump 8 is discharged to the box body 1 in sequence through the second connecting pipe 10, the exhaust pipe 4, the air cavity 53 and the outer exhaust pipe 54. When the gas discharged from the exhaust pipe 4 is excessive and the discharge flow rate of the outer exhaust pipe 54 is less than the input flow rate of the exhaust pipe 4, the air cavity 53 can be used to temporarily store gas to avoid the shutdown of the vacuum pump 8.

[0064] To keep the interior of the box body 1 in a vacuum state, the vacuum pump 8 will extract the gas inside the box body 1 at regular intervals. Specifically, to make the box body 1 in a high vacuum state, the vacuum pump 8 can extract the gas inside the box body 1 once a week.

[0065] This application also provides a cold storage device, including a drawer (not shown) and the pump body noise reduction assembly as described above. The pump body noise reduction assembly is connected to the drawer, and the vacuum pump 8 is used to extract the air inside the drawer. Specifically, the main suction pipe 2 can be connected to the inside of the drawer, and the vacuum pump 8 extracts the air inside the drawer through the main suction pipe 2 to make the inside of the drawer in a vacuum state and improve the storage quality of food.

[0066] The cold storage device can be a refrigerator, a freezer or other devices.

[0067] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application shall be included within the scope of protection of this application.

Claims

1. A noise reduction box structure, characterized in that, It includes a box body, an air intake main pipe, an air intake branch pipe and an exhaust pipe; the exhaust pipe is located in the box body and can exhaust air to the outside of the box body; part of the air intake main pipe passes through the box body; the air intake branch pipe is connected to the air intake main pipe, and the air intake branch pipe is located in the box body.

2. The noise reduction box structure according to claim 1, wherein, It also includes a central connection box arranged in the box body; the central connection box is provided with a first through cavity and a second through cavity that are connected; part of the air intake main pipe is located in the first through cavity, and at least part of the air intake branch pipe is located in the second through cavity.

3. The noise reduction box structure according to claim 2, characterized in that The middle box is provided with an air cavity and an external exhaust pipe; the air cavity is isolated from the first through cavity and the second through cavity; the exhaust pipe is connected to the middle box and communicated with the air cavity; the external exhaust pipe passes through the side wall of the middle box and the box body and communicates with the air cavity.

4. The noise reduction box structure according to claim 1, wherein It also includes a check valve; the check valve is arranged at one end of the suction branch pipe away from the suction main pipe.

5. The noise reduction box structure according to claim 1, wherein, It also includes a valve controller; the valve controller is sleeved on one end of the air suction main pipe located outside the box body.

6. The noise reduction box structure according to claim 2, wherein The box body comprises a through hole and a sealing ring; the air intake main pipe passes through the through hole, and the sealing ring is arranged around the through hole and is attached between the intermediate box and the box body.

7. The noise reduction box structure according to claim 6, characterized in that, The box body comprises an upper box cover and a lower box body connected to each other; the upper box cover is provided with a sealing groove, the through hole is provided in the upper box cover, and part of the sealing ring is located in the sealing groove; the intermediate box is connected to the upper box cover.

8. The noise reduction box structure according to claim 7, wherein, The intermediate box comprises a sealing box cover, a mounting box body and a connecting flange; the sealing ring is fitted between the upper box cover and the sealing box cover; the connecting flange is arranged on the mounting box body, and the connecting flange is connected to the upper box cover.

9. A pump body noise reduction assembly, characterized in that, It includes a vacuum pump, a first connecting pipe, a second connecting pipe and a noise reduction box structure as described in any one of claims 1 to 8; the vacuum pump is fixed in the box body, and the two ends of the first connecting pipe are respectively connected to the suction main pipe and the air inlet of the vacuum pump; the two ends of the second connecting pipe are respectively connected to the exhaust pipe and the air outlet of the vacuum pump.

10. A cold storage device, characterized in that, It comprises a drawer and the pump body noise reduction assembly as claimed in claim 9, wherein the pump body noise reduction assembly is connected to the drawer, and the vacuum pump is used to extract air from the drawer.

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