A double vacuum box insulation system with hose

Abstract

The invention discloses a double vacuum box insulation system with a hose, comprising a main vacuum box, an auxiliary vacuum box and a hose; the main vacuum box and the auxiliary vacuum box are sealed and connected at the connection position, a first pipe sleeve is fixed on the main vacuum box, a circulation pipe in the main vacuum box passes through the first pipe sleeve and enters the auxiliary vacuum box, one end of the hose is sealed and connected to the auxiliary vacuum box and connected to the port of the circulation pipe in the auxiliary vacuum box; a partition for separating the main vacuum box and the auxiliary vacuum box and only for the circulation pipe to pass through is provided in the first pipe sleeve. An auxiliary vacuum box is arranged between the main vacuum box and the hose, one end of the hose is connected to the auxiliary vacuum box, and the circulation pipe extending from the main vacuum box is connected to the hose in the auxiliary vacuum box, thereby overcoming the problem of affecting the vacuum degree in the main vacuum box due to the characteristics of the hose such as leakage, air permeability and air outlet, and because the volume of the auxiliary vacuum box can be made very small, only a smaller vacuum pump is needed to quickly pump the auxiliary vacuum box to the target vacuum degree, and the cost is relatively low.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum insulation equipment, and in particular to a double vacuum box insulation system with a hose. Background Art

[0002] Since the refrigerant has little cooling loss when exchanging heat in a vacuum environment, vacuum insulation is a very efficient insulation solution for low-temperature and ultra-low-temperature systems.

[0003] At present, vacuum box insulation systems with injection molding hoses on the market are basically single vacuum box insulation systems. Compared with metal materials such as stainless steel, the permeability coefficient, air permeability and air outflow rate of injection molding hoses at room temperature are much larger. The permeability coefficient of injection molding hoses to air is generally 0.32~0.88×10 －7 cm 3 (STP)cm / cm 2 ·s); the air permeability is generally 0.2~115×10 －6 cm 3 (STP)cm·cm －2 ·s －1 ; The gas outlet rate within 5 minutes is generally 25~95×10 －4 Pa.L.S －1 cm －2 The rapid leakage, air permeability and gas release of the injection hose will cause the single vacuum box insulation system to be unable to maintain the target vacuum degree. The injection hose is an operating tube and cannot be cancelled or replaced with a metal tube.

[0004] Before each use of the vacuum box insulation system with injection hose, in order to avoid excessive temperature loss, it is necessary to evacuate the vacuum box first. Because the vacuum box is generally large in size, it takes a long time to evacuate the vacuum box. If the vacuum degree is to be drawn to the target value within a certain period of time, the required vacuum pump model is relatively large. This results in the need to configure a large vacuum pump for the unit, and the overall cost will increase exponentially. Moreover, large vacuum pumps have large vibrations and high noise, which will lead to a poor customer experience; at the same time, large vacuum pumps are large in size, heavy in weight, and high in power, which will eventually lead to the whole machine facing the disadvantages of huge size, overweight, and high consumption.

[0005] In some low-temperature or ultra-low-temperature refrigeration systems, the heat exchanger where the refrigerant performs heat exchange is generally set in a vacuum box to reduce the loss of cold energy. Summary of the invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the vacuum insulation system with a hose in the prior art requires a relatively large vacuum pump, resulting in high cost, thereby providing a double vacuum box insulation system with a hose.

[0007] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0008] A double vacuum box insulation system with a hose, comprising a main vacuum box, an auxiliary vacuum box and a hose; the main vacuum box and the auxiliary vacuum box are sealed and connected at the connecting position, a first pipe sleeve is fixed on the main vacuum box, a circulation pipe in the main vacuum box passes through the first pipe sleeve and enters the auxiliary vacuum box, one end of the hose is sealed and connected to the auxiliary vacuum box and connected to the port of the circulation pipe in the auxiliary vacuum box; a partition is provided in the first pipe sleeve for separating the main vacuum box and the auxiliary vacuum box and only for the circulation pipe to pass through.

[0009] Furthermore, the top opening of the main vacuum box and the lower opening of the auxiliary vacuum box are sealed and connected via a flange.

[0010] Furthermore, the flange includes a first flange and a second flange, the first flange is welded on the top opening of the main vacuum box, the second flange is welded on the bottom opening of the auxiliary vacuum box, and the first flange and the second flange are sealed and connected by a flange clamp.

[0011] Furthermore, the main vacuum box includes a main vacuum box body with an opening on the top and a main vacuum box cover plate with a sealing cover arranged on the opening on the top of the main vacuum box body, the first pipe sleeve is welded and fixed to the main vacuum box cover plate; the circulation pipe is welded and fixed to the partition of the first pipe sleeve; the first flange is welded and fixed to the main vacuum box cover plate and is arranged corresponding to the position of the first pipe sleeve.

[0012] Furthermore, the circulation pipe includes a circulation inlet pipe and a circulation outlet pipe.

[0013] Furthermore, the main vacuum box cover is provided with an interface for communicating with a low-temperature refrigerator, and the low-temperature refrigerator is sealed and connected to the interface of the main vacuum box cover through a flange, and the low-temperature refrigerator includes a cold plate heat exchanger with one end extending from the interface of the main vacuum box cover into the main vacuum box, and a reflux heat exchanger is also provided in the main vacuum box; one end of the cold plate heat exchanger is connected to the circulation inlet pipe, and the other end is connected to the circulation outlet pipe through the reflux heat exchanger.

[0014] Furthermore, a second pipe sleeve and a third pipe sleeve are welded and fixed on the main vacuum box cover plate; the reflux heat exchanger is connected to a refrigerant inlet pipe and a refrigerant outlet pipe; the refrigerant inlet pipe passes through the second pipe sleeve and extends out of the main vacuum box, and the refrigerant inlet pipe is welded and fixed in the second pipe sleeve; the refrigerant outlet pipe passes through the third pipe sleeve and extends out of the main vacuum box, and the refrigerant outlet pipe is welded and fixed in the third pipe sleeve.

[0015] Furthermore, the auxiliary vacuum box comprises an auxiliary vacuum box body with an opening at the top and an auxiliary vacuum box cover plate with a sealing cover arranged on the opening at the top of the auxiliary vacuum box body, and the vacuum port of the auxiliary vacuum box is arranged on the auxiliary vacuum box cover plate.

[0016] Furthermore, the main vacuum box is connected to a vacuum valve via a vacuum tube.

[0017] Furthermore, the volume of the auxiliary vacuum box is smaller than the volume of the main vacuum box.

[0018] The technical solution of the present invention has the following advantages:

[0019] 1. The double vacuum box insulation system with hose provided by the present invention has an auxiliary vacuum box arranged between the main vacuum box and the hose, the bottom opening of the auxiliary vacuum box is sealed and connected with the top opening of the main vacuum box, and a first pipe sleeve is fixed on the main vacuum box, one end of the hose is connected to the auxiliary vacuum box, and the circulation pipe extending from the main vacuum box is connected to the hose in the auxiliary vacuum box, which overcomes the problem of affecting the vacuum degree in the main vacuum box due to the leakage, air permeability and air outlet of the hose, and the main vacuum box can maintain a vacuum state for a long time; moreover, since there is no need to set up refrigeration and heat exchange equipment in the auxiliary vacuum box, the vacuum degree requirement is relatively low, and the volume can be made very small relative to the main vacuum box, and there is no need to configure a large vacuum pump. Only a smaller vacuum pump needs to be configured and assembled in the unit, and the auxiliary vacuum box can be quickly pumped to the target vacuum degree, and the cost is relatively low. In addition, the smaller vacuum pump generally has small vibration and low noise when working, and the customer experience is better; at the same time, the smaller vacuum pump is small in size, light in weight, and low in power, which can make the whole machine smaller in size, lighter in weight, and lower in power.

[0020] 2. The double vacuum box insulation system with a hose provided by the present invention has a first pipe sleeve welded and fixed on the main vacuum box cover plate, and a circulation pipe welded and fixed on the partition of the first pipe sleeve, so that the air tightness of the connection between the main vacuum box and the auxiliary vacuum box is better, which is beneficial for the main vacuum box to maintain an ultra-high vacuum degree for a long time.

[0021] 3. In the double vacuum box insulation system with a hose provided by the present invention, the low-temperature refrigerant is connected to the main vacuum box cover through a flange seal, and the refrigerant inlet pipe and the refrigerant outlet pipe are welded and fixed to the main vacuum box cover through the second pipe sleeve and the third pipe sleeve respectively, which can further ensure that the main vacuum box can maintain an ultra-high vacuum degree for a long time and reduce the cooling loss of the refrigerant medium during heat exchange in the main vacuum box. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the internal structure of a double vacuum box insulation system with a hose provided in Example 1 of the present invention;

[0024] Figure 2 Schematic diagram of the internal structure of the main vacuum box in the first embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the connection structure between the auxiliary vacuum box and the hose in the first embodiment of the present invention;

[0026] Figure 4 A schematic diagram of the internal structure of a double vacuum box insulation system with a hose provided in the second embodiment of the present invention.

[0027] Explanation of the reference numerals: 1. Main vacuum box; 101. Main vacuum box body; 102. Main vacuum box cover; 2. Auxiliary vacuum box; 201. Auxiliary vacuum box body; 202. Auxiliary vacuum box cover; 3. Hose; 4. First pipe sleeve; 41. Partition; 5. Circulation inlet pipe; 6. Circulation outlet pipe; 7. Low-temperature refrigerator; 8. Cold plate heat exchanger; 9. Reflux heat exchanger; 10. Second pipe sleeve; 11. Third pipe sleeve; 12. Refrigerant inlet pipe; 13. Refrigerant outlet pipe; 14. Flange; 15. KF25 flange clamp; 16. Vacuum tube; 17. Vacuum valve. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be 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.

[0031] Embodiment 1

[0032] like Figure 1 -3 shows a double vacuum box insulation system with a hose, comprising a main vacuum box 1, an auxiliary vacuum box 2 and a hose 3. The main vacuum box 1 comprises a main vacuum box body 101 with an opening at the top and a main vacuum box cover plate 102 with a sealing cover arranged on the opening at the top of the main vacuum box body 101. A reflux heat exchanger 9 and a cold plate heat exchanger 8 are arranged in the main vacuum box 1. The reflux heat exchanger 9 and the cold plate heat exchanger 8 are connected through pipelines. The reflux heat exchanger 9 is connected with a circulation outlet pipe 6. The cold plate heat exchanger 8 is connected with a circulation inlet pipe 5. The reflux heat exchanger 9 is also connected with a refrigerant inlet pipe 12 and a refrigerant outlet pipe 13. The circulation inlet pipe 5, the cold plate heat exchanger 8, the reflux heat exchanger 9 and the circulation outlet pipe 6 form a refrigerant cooling circuit. The refrigerant enters the main vacuum box 1 through the circulation inlet pipe 5, and then passes through the cold plate heat exchanger 8 for primary cooling and the reflux heat exchanger 9 for secondary cooling in sequence, and then becomes a low-temperature refrigerant and flows out from the circulation outlet pipe 6.

[0033] In this embodiment, a first sleeve 4 is welded and fixed on the main vacuum box cover 102, one end of the first sleeve 4 is embedded in the step surface of the main vacuum box cover 102, the lower end opening of the auxiliary vacuum box 2 is sealed and connected to the top opening of the main vacuum box cover 102 through a flange 14, and the flange 14 and the first sleeve 4 are coaxially arranged. The flange 14 includes a first flange and a second flange. The first flange is welded on the step surface of the top opening of the main vacuum box cover 102, and the second flange is welded on the bottom opening of the auxiliary vacuum box 2. The first flange and the second flange are sealed and connected through a flange clamp. Specifically, the flange 14 adopts a KF flange or a CF flange, and the flange clamp is a KF flange clamp 15 to ensure the sealing of the connection between the auxiliary vacuum box 2 and the main vacuum box 1.

[0034] In this embodiment, the circulation inlet pipe 5 and the circulation outlet pipe 6 in the main vacuum box 1 extend out of the main vacuum box 1 and into the auxiliary vacuum box 2 through the first pipe sleeve 4. The first pipe sleeve 4 is provided with a partition plate for separating the internal space of the main vacuum box 1 and the auxiliary vacuum box 2 and only for the circulation inlet pipe 5 and the circulation outlet pipe 6 to pass through. The circulation inlet pipe 5 and the circulation outlet pipe 6 are welded and fixed on the partition plate of the first pipe sleeve 4. The first pipe sleeve 4 is welded and fixed on the main vacuum box cover plate 102, and the circulation inlet pipe 5 and the circulation outlet pipe 6 are welded and fixed on the partition plate of the first pipe sleeve 4, so that the airtightness of the connection between the main vacuum box 1 and the auxiliary vacuum box 2 is better, which is conducive to the main vacuum box 1 to maintain an ultra-high vacuum degree for a long time, and is easy to manufacture.

[0035] In this embodiment, the main vacuum box body 101 is connected to a vacuum valve 17 via a vacuum tube 16. The vacuum valve 17 is used to connect to a vacuum pump and can be turned off. The vacuum tube 16 is specifically a CF vacuum tube.

[0036] In this embodiment, one end of the auxiliary vacuum box 2 is provided with a pipe interface for connecting with the hose 3, and the pipe interface communicates with the space inside the auxiliary vacuum box 2. One end of the hose 3 is connected to the pipe interface through a KF flange, so that the internal space of the hose 3 can communicate with the internal space of the auxiliary vacuum box 2. The hose 3 extends into the auxiliary vacuum box 2 and connects with the ports of the circulation inlet pipe 5 and the circulation outlet pipe 6 in the auxiliary vacuum box 2. Specifically, the KF flange on the hose 3 is clamped by a KF flange clamp 15 to ensure the airtightness of the connection between the hose 3 and the auxiliary vacuum box 2.

[0037] In this embodiment, the circulation inlet pipe 5, the circulation outlet pipe 6, the refrigerant inlet pipe 12, the refrigerant outlet pipe 13 and other pipeline parts in the main vacuum box 1 or the auxiliary vacuum box 2 are all made of stainless steel metal material.

[0038] In this embodiment, the main vacuum box cover plate 102 is provided with an interface for communicating with the cryogenic refrigerator 7, and the cryogenic refrigerator 7 is sealed and connected to the interface of the main vacuum box cover plate 102 through a CF flange, and the cold plate heat exchanger 8 is a part of the cryogenic refrigerator 7. The main vacuum box cover plate 102 is also welded and fixed with a second pipe sleeve 10 and a third pipe sleeve 11; the refrigerant inlet pipe 12 passes through the second pipe sleeve 10 and extends out of the main vacuum box 1, and the refrigerant inlet pipe 12 is welded and fixed in the second pipe sleeve 10; the refrigerant outlet pipe 13 passes through the third pipe sleeve 11 and extends out of the main vacuum box 1, and the refrigerant outlet pipe 13 is welded and fixed in the third pipe sleeve 11. The low-temperature refrigerant is sealed and connected to the main vacuum box cover 102 through the CF flange, and the refrigerant inlet pipe 12 and the refrigerant outlet pipe 13 are welded and fixed to the main vacuum box cover 102 through the second pipe sleeve 10 and the third pipe sleeve 11 respectively, which can further ensure that the main vacuum box 1 can maintain an ultra-high vacuum degree for a long time and reduce the cooling loss of the refrigerant medium during heat exchange in the main vacuum box 1.

[0039] In this embodiment, the auxiliary vacuum box 2 includes an auxiliary vacuum box body 201 with a top opening and an auxiliary vacuum box cover plate 202 with a sealing cover arranged on the auxiliary vacuum box body 201 . The vacuum port of the auxiliary vacuum box 2 is arranged on the auxiliary vacuum box cover plate 202 .

[0040] Embodiment 2

[0041] like Figure 4 The dual vacuum box insulation system with hoses shown is different from the first embodiment in that a reflux heat exchanger is not required in the main vacuum box 1, and the refrigerant enters the main vacuum box 1 through the refrigerant inlet pipe 12, which is connected to the inlet of the cold plate heat exchanger 8, and the outlet of the cold plate heat exchanger 8 is connected to the circulation inlet pipe 5, and the refrigerant outlet pipe 13 is connected to the circulation outlet pipe 6 in the main vacuum box 1. The refrigerant enters from the refrigerant inlet pipe 12, circulates and exchanges heat through the cold plate heat exchanger 8 and the hose system, and finally returns to the refrigerant outlet pipe 13. In this way, the refrigerant always runs in the two vacuum systems for circulation and heat exchange, and the cooling loss will be very small, achieving the insulation function.

[0042] This double vacuum box insulation system with a hose has an auxiliary vacuum box 2 arranged between the main vacuum box 1 and the hose 3. The bottom opening of the auxiliary vacuum box body 201 and the top opening of the main vacuum box cover 102 are sealed and connected via a CF flange, and the CF flange is fixed by a flange clamp; a first pipe sleeve 4 corresponding to the position of the CF flange is welded and fixed on the inner wall of the main vacuum box cover 102, the auxiliary vacuum box 2 is connected to the main vacuum box 1 via the CF flange, one end of the hose 3 is connected to the auxiliary vacuum box 2, and the circulation pipe extending from the main vacuum box 1 is connected to the hose 3 in the auxiliary vacuum box 2, thereby overcoming the problem of leakage caused by the hose 3. The main vacuum box 1 can maintain a vacuum state for a long time within one to five years. It does not need to be vacuumed during use. It only needs to vacuum the auxiliary vacuum box. Moreover, since there is no need to set up refrigeration and heat exchange equipment in the auxiliary vacuum box 2, the vacuum degree requirement is relatively low. The volume can be made very small compared with the main vacuum box 1. There is no need to configure a large vacuum pump. Only a smaller vacuum pump needs to be installed in the unit. After continuous extraction for 10 minutes, the auxiliary vacuum box 2 can be quickly pumped to the target vacuum degree of 10Pa, and the cost is relatively low. In addition, smaller vacuum pumps generally have less vibration and low noise when working, and the customer experience is better. At the same time, smaller vacuum pumps are small in size, light in weight, and low in power. They can be directly installed in the unit, which is quick and convenient to use, and can make the whole machine smaller in size, lighter in weight, and lower in power.

[0043] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A double vacuum box insulation system with a hose, characterized in that: The invention comprises a main vacuum box (1), an auxiliary vacuum box (2) and a hose (3); the volume of the auxiliary vacuum box (2) is smaller than that of the main vacuum box (1); the main vacuum box (1) and the auxiliary vacuum box (2) are sealed and connected at the communicating position; a first pipe sleeve (4) is fixed on the main vacuum box (1); a circulation pipe in the main vacuum box (1) passes through the first pipe sleeve (4) and enters the auxiliary vacuum box (2); one end of the hose (3) is sealed and connected to the auxiliary vacuum box (2) and is connected to the end of the circulation pipe in the auxiliary vacuum box (2); a partition (41) is provided in the first pipe sleeve (4) for separating the main vacuum box (1) and the auxiliary vacuum box (2) and only for the circulation pipe to pass through; The auxiliary vacuum box (2) comprises an auxiliary vacuum box body (201) having an opening at the top and an auxiliary vacuum box cover plate (202) having a sealing cover arranged on the opening at the top of the auxiliary vacuum box body (201); the vacuum port of the auxiliary vacuum box (2) is arranged on the auxiliary vacuum box cover plate (202); The main vacuum box (1) is connected to a vacuum valve (17) via a vacuum pipe (16).

2. The double vacuum box insulation system with hose according to claim 1, characterized in that: The top opening of the main vacuum box (1) and the lower opening of the auxiliary vacuum box (2) are sealed and connected via a flange.

3. The double vacuum box insulation system with hose according to claim 2, characterized in that: The flange comprises a first flange plate and a second flange plate, wherein the first flange plate is welded on the top opening of the main vacuum box (1), and the second flange plate is welded on the bottom opening of the auxiliary vacuum box (2), and the first flange plate and the second flange plate are sealed and connected by a flange clamp.

4. The double vacuum box insulation system with hose according to claim 3, characterized in that: The main vacuum box (1) comprises a main vacuum box body (101) having an opening at the top and a main vacuum box cover plate (102) with a sealing cover arranged on the opening at the top of the main vacuum box body (101); the first pipe sleeve (4) is welded and fixed on the main vacuum box cover plate (102); the circulation pipe is welded and fixed on the partition plate (41) of the first pipe sleeve (4); and the first flange is welded and fixed on the main vacuum box cover plate (102) and is arranged corresponding to the position of the first pipe sleeve (4).

5. The double vacuum box insulation system with hose according to claim 4, characterized in that: The circulation pipe comprises a circulation inlet pipe (5) and a circulation outlet pipe (6).

6. The double vacuum box insulation system with hose according to claim 5, characterized in that: The main vacuum box cover plate (102) is provided with an interface for communicating with a low-temperature refrigerator (7); the low-temperature refrigerator (7) is sealedly connected to the interface of the main vacuum box cover plate (102) through a flange; the low-temperature refrigerator (7) comprises a cold plate heat exchanger (8) having one end extending from the interface of the main vacuum box cover plate (102) into the main vacuum box (1); a reflux heat exchanger (9) is also provided in the main vacuum box (1); one end of the cold plate heat exchanger (8) is communicated with the circulation inlet pipe (5), and the other end is connected to the circulation outlet pipe (6) through the reflux heat exchanger (9).

7. The double vacuum box insulation system with a hose according to claim 6, characterized in that: A second pipe sleeve (10) and a third pipe sleeve (11) are welded and fixed on the main vacuum box cover plate (102); the refrigerant inlet pipe (12) and the refrigerant outlet pipe (13) are connected to the reflux heat exchanger (9); the refrigerant inlet pipe (12) passes through the second pipe sleeve (10) and extends out of the main vacuum box (1), and the refrigerant inlet pipe (12) is welded and fixed in the second pipe sleeve (10); the refrigerant outlet pipe (13) passes through the third pipe sleeve (11) and extends out of the main vacuum box (1), and the refrigerant outlet pipe (13) is welded and fixed in the third pipe sleeve (11).

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