A portable Stirling ultra-low temperature thermostat

Abstract

The present invention discloses a portable mobile Stirling ultra-low temperature thermostat, comprising a box body, wherein a refrigeration chamber and a control chamber are arranged side by side inside the box body; a Stirling refrigerator is installed on a support frame inside the control chamber, a heat preservation cold head is installed on the top of the Stirling refrigerator, and a cold guide pipe connected to the heat preservation cold head is arranged around the outside of the refrigeration chamber; a heat insulation structure is arranged between the refrigeration chamber and the inner wall of the box body; a box cover is arranged on the upper side of the refrigeration chamber; a connecting pipe is transversely installed in the side wall of one side of the box body, and one end of the connecting pipe extends to the inside of the refrigeration chamber; a sealing plug is detachably installed at the outward end of the connecting pipe to seal the connecting pipe; a temperature probe is used to insert into the connecting pipe after the sealing plug is removed from the connecting pipe and extend to the refrigeration chamber for temperature monitoring. The present invention can realize ultra-low temperature constant temperature control, is convenient to transport and carry, and solves the technical problem that the existing ultra-low temperature refrigerator cannot be transported.

Description

Technical Field

[0001] The invention relates to the application field of Stirling refrigeration, in particular to a portable mobile Stirling ultra-low temperature constant temperature box. Background Art

[0002] With the market application of biopharmaceuticals, clinical drugs and laboratory sampling, more and more scenarios require temperature-sensitive drugs and samples to be transported and stored with precise temperature and ultra-low temperature. Existing ultra-low temperature refrigerators can only be placed in fixed places and have special requirements for power supply. Ice pack insulation boxes need to be pre-cooled in the freezer in advance, and complex operations such as cold adaptation are required, making it difficult to meet user needs in clinical and sample reagent collection and cold chain drug transportation.

[0003] In addition, in order to monitor the temperature in the low-temperature box during transportation, for low-temperature boxes without built-in temperature sensors, the monitoring probe can only be inserted into the refrigerated cavity, which requires a hole to be opened on the body of the low-temperature box. However, after the hole is opened, the cold air in the refrigerated cavity will leak out, causing frost in the refrigerated cavity. If the hole is blocked, the lid of the low-temperature box will be difficult to open due to the negative pressure, and a door opener is required to open it, which is very inconvenient.

[0004] Therefore, an ultra-low temperature constant temperature box that can accurately control the temperature during transportation is needed to solve the technical problems that existing low-temperature refrigerators cannot solve. Summary of the invention

[0005] The invention provides a portable Stirling ultra-low temperature constant temperature box, which can realize ultra-low temperature constant temperature control, is convenient to transport and carry, and solves technical problems that cannot be solved by existing low-temperature refrigerators.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a portable mobile Stirling ultra-low temperature constant temperature box, comprising a box body, wherein a refrigeration chamber and a control chamber are arranged side by side inside the box body; a Stirling refrigerator is installed on a support frame inside the control chamber, a heat preservation cold head is installed on the top of the Stirling refrigerator, and a cooling pipe connected to the heat preservation cold head is arranged around the outer side of the refrigeration chamber; the ultra-low temperature constant temperature box of the present invention adopts a Stirling refrigerator for refrigeration, and the heat preservation cold head can continuously transport the cold to the refrigeration chamber through the cooling pipe, which can ensure stable low-temperature refrigeration of the refrigeration chamber, and a box cover is arranged on the upper side of the refrigeration chamber, and one side of the box cover is connected to the box body in a flip manner, which can facilitate the taking and placing of items in the refrigeration chamber.

[0007] The present invention also has a heat-insulating structure, which is arranged between the refrigeration cavity and the inner wall of the box body. The heat-insulating structure includes a glass fiber board arranged on the outside of the refrigeration cavity, a cold conduction pipe is embedded in the glass fiber board, a first glass wool insulation layer is arranged on the outside of the glass fiber board, and a polyurethane foam layer is arranged on the outside of the first glass wool insulation layer. The thermal conductivity of the glass fiber board is relatively low. The first glass wool insulation layer and the polyurethane foam layer together can greatly improve the thermal insulation effect, optimize the cold conduction effect and the consistency of the internal temperature zone and the uniformity of the temperature.

[0008] A connecting pipe is transversely installed in the side wall of one side of the box body, one end of the connecting pipe extends to the inside of the refrigerating chamber, so that the refrigerating chamber is connected with the outside of the box body; a sealing plug is detachably installed at the end of the connecting pipe facing outward to seal the connecting pipe, a vent is arranged inside the sealing plug, and a placement cavity is arranged at the end of the vent away from the refrigerating chamber, a sealing ball is placed in the placement cavity, and the sealing ball is used to seal the vent under the action of negative pressure in the refrigerating chamber when the refrigerating chamber is refrigerated; a temperature probe is used to be inserted into the connecting pipe after the sealing plug is removed from the connecting pipe and extend into the refrigerating chamber for temperature monitoring. In the scheme of the present invention, a fixed channel is formed by using the connecting pipe, and the temperature probe can be placed and positioned inside it, and the temperature probe can be blocked by the sealing plug after being pulled out to prevent the cold in the refrigerating chamber from leaking out, and at the same time, when the box cover needs to be opened, the sealing plug will be separated from the vent due to vibration, so that the refrigerating chamber is connected with the outside for a short time, so that the box cover can be easily opened without using a box opener.

[0009] Preferably, a detachable battery pack assembly is installed at the bottom of the box, and the battery pack assembly includes a battery pack and a bottom plate arranged on one side of the battery pack. A conductive connecting socket is installed at one end of the battery pack, and the battery pack is projected within the range of the bottom plate. The bottom plate is arranged flush with the bottom of the box. When the bottom plate is assembled with the box, the conductive connecting socket of the battery pack is connected to the conductive plug in the control cavity, and the bottom plate and the battery pack are combined together. The bottom plate can be used as a part of the box, and the battery pack can be quickly and stably installed while being connected to the box, which is very convenient.

[0010] Preferably, a second glass wool insulation layer is installed inside the box cover, and the second glass wool insulation layer together with the multi-layer insulation structure on the side wall of the refrigeration chamber can effectively insulate the interior of the refrigeration chamber.

[0011] Preferably, the cooling pipe is arranged obliquely on each outer side wall of the refrigerating chamber, so that the cooling pipe can cover a relatively large range of the side wall of the refrigerating chamber, thereby improving the refrigeration efficiency.

[0012] Preferably, the temperature probe is cylindrical, and its outer diameter matches the inner diameter of the connecting tube, so that the outer wall of the temperature probe is in close contact with the inner wall of the connecting tube, so that the cold in the refrigerated chamber will not leak out when the temperature probe is monitoring.

[0013] Preferably, the outward end face of the sealing plug is densely covered with air perforations, and the placement cavity is located between the air perforations and the vent holes. The positions of the air perforations form side walls that can limit the sealing plug to prevent it from falling out, and also allow the vent holes to be connected to the outside world.

[0014] Preferably, a dry deodorant placement box is provided on the side wall of the refrigerating chamber, and a desiccant can be placed in the dry deodorant placement box to absorb moisture and odor.

[0015] Preferably, a vehicle-mounted V power socket and a 110V-220V AC power socket are arranged side by side at the bottom of the outer wall of the control cavity, which is convenient and flexible to connect the power supply. The vehicle-mounted power supply can be used for power supply in the car, and the commonly used DC power supply can also be used for power supply at home.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] It uses Stirling refrigerator as the cooling source, which is light in weight and has precise temperature control. The temperature range is from 4 degrees to minus 86 degrees. The temperature control of the refrigerated chamber is more precise and stable. It can be powered by a variety of power supplies and vehicle-mounted power supplies. In a completely power-free environment, it can also be powered by a built-in 24V20A lithium power supply for 8 hours of insulation. It can meet the collection, storage and transportation of temperature-sensitive drugs and reagents in hospital clinics, biological laboratories, disease control centers, GP pharmacies, etc., as well as the low-temperature storage and transportation of high-end ingredients and fresh food.

[0018] The use of multi-layer composite insulation material optimizes the cooling effect and the consistency of the internal temperature zone and the uniformity of temperature. The insulation coefficient of the insulation box is increased by 30%, the cooling time is increased by 35%, and the power consumption is reduced by 35%.

[0019] The structure is simple, and a connecting pipe, a sealing plug and a temperature probe used in conjunction with the connecting pipe are provided. The connecting pipe forms a fixed channel, and the temperature probe can be placed and positioned inside the channel. After the temperature probe is pulled out, it can be sealed by the sealing plug to prevent the cold in the refrigeration chamber from leaking out. At the same time, when the box cover needs to be opened, the sealing plug will be separated from the vent due to vibration, so that the refrigeration chamber is connected to the outside for a short time, so that the box cover can be easily opened without using a box opener.

[0020] The ultra-low temperature mobile refrigerator of the present invention can adopt a variety of power sources, such as 110V-220V AC power supply and vehicle-mounted 12V-24V cigarette lighter connection, outdoor power supply and lithium battery pack power supply connection, which can realize ultra-low temperature constant temperature control, is convenient for transportation and carrying, and solves the technical problem that the existing ultra-low temperature refrigerator cannot be transported. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 It is a front cross-sectional structural diagram of the present invention;

[0023] Figure 3 It is a side cross-sectional structural diagram of the present invention;

[0024] Figure 4 for Figure 1 An enlarged structural diagram of the sealing plug installed at A;

[0025] Figure 5 for Figure 1 The enlarged structure diagram of the temperature probe placed at A;

[0026] Figure 6 It is a structural diagram of the sealing plug of the present invention;

[0027] Figure 7 It is a three-dimensional structural diagram of the battery pack assembly of the present invention.

[0028] Reference numerals:

[0029] 1. Box body, 11. Dry deodorant placement box, 12. Refrigeration chamber, 13. Glass fiber board, 14. First glass wool insulation layer, 15. Polyurethane foam layer, 16. Sealing ball, 17. Connecting pipe, 18. Temperature probe, 19. Control chamber, 2. Box cover, 21. Second glass wool insulation layer, 3. Sealing plug, 31. Vent hole, 32. Breathable perforation, 33. Placement chamber, 34. Limit extension, 4. On-board 12V power socket, 5. 110V-220V AC power socket, 6. Battery pack assembly, 61. Battery pack, 62. Bottom plate, 63. Conductive connection socket, 7. Support frame, 8. Stirling cooler, 9. Insulated cold head, 10. Cooling pipe. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0031] like Figure 1-7As shown, the present invention can achieve ultra-low temperature constant temperature control and is easy to transport and carry. In order to solve the technical problems that cannot be solved by existing low-temperature refrigerators, the following technical solutions are provided: a portable mobile Stirling ultra-low temperature constant temperature box, comprising a box body 1, wherein the interior of the box body 1 is provided with a refrigeration chamber 12 and a control chamber 19 side by side; a Stirling refrigerator 8 is installed on a support frame 7 inside the control chamber 19, a heat preservation cold head 9 is installed on the top of the Stirling refrigerator 8, and a cooling pipe 10 connected to the heat preservation cold head 9 is arranged around the outer side of the refrigeration chamber 12; the ultra-low temperature constant temperature box of the present invention adopts the Stirling refrigerator 8 for refrigeration, and the heat preservation cold head 9 can continuously transport the cold energy to the refrigeration chamber 12 through the cooling pipe 10, which can ensure the stable low-temperature refrigeration of the refrigeration chamber 12, and the box cover 2 is arranged on the upper side of the refrigeration chamber 12, and one side thereof is flipped and connected with the box body 1, which can facilitate the storage of the objects in the refrigeration chamber 12 The product can be taken and placed, wherein the heat-insulating cold head 9 includes an outer shell, the lower end of which is provided with a Stirling cooler shell insertion port, and one side of the outer shell is provided with a wiring port; a cooling base is arranged in the inner cavity of the outer shell; a cooling mounting ring is arranged on the lower side of the cooling base and corresponds to the Stirling cooler shell insertion port; a cooling adapter is installed on the upper side of the cooling base, and also includes a heat-insulating cover, which is arranged inside the outer shell to cover the cooling base, the cooling mounting ring and the cooling adapter. The heat-insulating cover is made of glass fiber, and the outer shell is made of polyurethane material. A cooling pipe 10 is installed on the cooling adapter, which passes through the side wall of the heat-insulating cover and leads out from the wiring port. By setting an internal heat-insulating cover to cover the cooling components, the loss of cold can be effectively prevented. The heat-insulating cover and the outer shell form a multi-layer insulation structure, so that the head insulation device can meet the need for cooling under low-temperature refrigeration of minus 120°C.

[0032] The present invention also has a heat-insulating structure, which is arranged between the refrigerating chamber 12 and the inner wall of the box body 1. The heat-insulating structure includes a glass fiber board 13 arranged on the outside of the refrigerating chamber 12, and a cooling pipe 10 is embedded in the glass fiber board 13. A first glass wool insulation layer 14 is arranged on the outside of the glass fiber board 13, and a polyurethane foam layer 15 is arranged on the outside of the first glass wool insulation layer 14. The thermal conductivity of the glass fiber board 13 is relatively low. The first glass wool insulation layer 14 and the polyurethane foam layer 15 can greatly improve the thermal insulation effect, optimize the cooling effect and the consistency of the internal temperature zone and the uniformity of the temperature. The cooling pipe 10 is a red copper cooling pipe filled with CO2 or ethane as a refrigerant for conduction. The cooling pipe 10 is inclined on each outer wall of the refrigerating chamber 12, so that the cooling pipe 10 can cover a relatively large side wall range of the refrigerating chamber 12, thereby improving the refrigeration efficiency.

[0033] The refrigeration chamber 12 is an aluminum liner supported by a 1 mm thick aluminum alloy. It is strong enough to effectively support the structural strength of the low-temperature box. The cooling pipe 10 adopts a closed-loop siphon design with a good refrigeration effect. The glass fiber board 13, the first glass wool insulation layer 14 and the polyurethane foam layer 15 simultaneously insulate the aluminum liner, and the first glass wool insulation layer 14 wraps it to provide a good insulation effect.

[0034] In addition, in order to further improve the insulation effect, a second glass wool insulation layer 21 is installed inside the box cover 2. The second glass wool insulation layer 21 and the multi-layer insulation structure on the side wall of the refrigeration chamber 12 can effectively insulate the interior of the refrigeration chamber 12.

[0035] The present embodiment also includes a connecting pipe 17, which is transversely installed in the side wall of one side of the box body 1, and one end of the connecting pipe 17 extends to the inside of the refrigerating chamber 12, so that the refrigerating chamber 12 is connected with the outside of the box body 1; a sealing plug 3 is detachably installed at the end of the connecting pipe 17 facing outward to seal the connecting pipe 17, and a vent hole 31 is provided inside the sealing plug 3, and a placement cavity 33 is provided at the end of the vent hole 31 away from the refrigerating chamber 12, and a sealing ball 16 is placed in the placement cavity 33, and the sealing ball 16 is used to seal under the action of negative pressure in the refrigerating chamber 12 when the refrigerating chamber 12 is refrigerated. The temperature probe 18 is used to be inserted into the connecting pipe 17 and extend into the refrigerating chamber 12 for temperature monitoring after the sealing plug 3 is removed from the connecting pipe 17. In the solution of the present invention, the connecting pipe 17 is used to form a fixed channel, in which the temperature probe 18 can be placed and positioned. After the temperature probe 18 is pulled out, it can be sealed by the sealing plug 3 to prevent the cold in the refrigerating chamber from leaking out. At the same time, when the box cover 2 needs to be opened, the sealing plug 3 will be separated from the vent due to vibration, so that the refrigerating chamber 12 is connected to the outside for a short time, so that the box cover 2 can be easily opened without using a box opener.

[0036] Specifically, the connecting pipe 17 and the sealing plug 3 can be made of low thermal conductivity materials, such as ceramics, rubber, etc., which can prevent the cold in the refrigeration chamber 12 from leaking out along the connecting pipe 17 and the sealing plug 3, and the sealing ball 16 is made of PP plastic, which is light in weight and can easily block the vent 31 under the negative pressure in the refrigeration chamber 12. When the box cover 2 needs to be opened, the user's hand will touch the box body 1 or the box cover 2, so that the low-temperature box will be vibrated, and the sealing ball 16 will be separated from the vent 31 after vibration, and the negative pressure state in the refrigeration chamber 12 will be released, so that the box cover 2 is easy to open. If the sealing ball 16 is designed with a relatively large adsorption force, the box body 1 can also be shaken to separate the sealing ball 16 from the vent 31.

[0037] Among them, a limiting extension 34 is arranged around the edge of the outward end of the sealing plug 3, and the position of the sealing plug 3 can be limited by the limiting extension 34, which can facilitate the installation and disassembly of the sealing plug 3. For example, when disassembling, the sealing plug 3 can be disassembled by using tools or bare hands on the limiting extension 34.

[0038] In this embodiment, the temperature probe 18 is cylindrical, and its outer diameter matches the inner diameter of the connecting tube 17, so that the outer wall of the temperature probe 18 is in close contact with the inner wall of the connecting tube 17, so that the cold in the refrigeration chamber 12 will not leak out when the temperature probe 18 is monitoring. The end surface of the sealing plug 3 facing outward is densely covered with air perforations 32, and the placement cavity 33 is located between the air perforations 32 and the vent holes 31. The position of the air perforations 32 forms a side wall that can limit the sealing plug to prevent it from falling out, and also allows the vent holes to be connected to the outside.

[0039] In this embodiment, in order to facilitate the installation and disassembly of the battery pack, a detachable battery pack assembly 6 is installed at the bottom of the box body 1. The battery pack assembly 6 includes a battery pack 61 and a bottom plate 62 arranged on one side of the battery pack 61. A conductive connection socket 63 is installed at one end of the battery pack 61. The battery pack 61 is projected within the range of the bottom plate 62. The bottom plate 62 is arranged flush with the bottom of the box body 1. When the bottom plate 62 is assembled with the box body 1, the conductive connection socket 63 of the battery pack 61 is connected to the conductive plug in the control cavity 19 to combine the bottom plate 62 with the battery pack 61. The bottom plate 62 can be used as a part of the box body 1. While being connected to the box body 1, the battery pack 61 can be installed quickly and stably, which is very convenient. Specifically, the battery pack 61 adopts a 24V20A lithium battery, which can meet the use of the low-temperature constant temperature box for 8 hours. The distance between the edge of the bottom plate 62 and the side wall edge of the battery pack 61 is equal, which can provide sufficient space for the connection between the bottom plate 62 and the low-temperature box. At the same time, one end of the battery pack 61 is provided with a concave notch, and the conductive connection socket 63 is installed in the concave notch. The concave notch can protect the conductive connection socket 63 to prevent the battery pack 61 from being damaged by collision during transportation. The position of the concave notch can be adjusted as needed.

[0040] In addition, the battery pack 61 and the bottom plate 62 are integrally formed, with a firm structure and convenient transportation and replacement. At the same time, at least one screw connection portion is provided at one end of the bottom plate 62, and the screw connection portion is connected to the side wall of the Stirling low temperature box through screws, and at least one buckle plate is provided at the other end of the bottom plate 62, and the buckle plate is buckled with the inner side of the side wall of the Stirling low temperature box. One end of the bottom plate 62 can be connected to the body of the low temperature box through screws and screw connections, and the other end of the bottom plate 62 is limited by the buckle plate, which can realize the rapid installation and rapid removal of the bottom plate 62.

[0041] In this embodiment, a dry deodorant placement box 11 is provided on the side wall of the refrigerating chamber 12, and a desiccant can be placed in the dry deodorant placement box 11 to absorb moisture and odor.

[0042] In this embodiment, a vehicle-mounted 12V power socket 4 and a 110V-220V AC power socket 5 are arranged side by side at the bottom of the outer wall of the control cavity 19, which is convenient and flexible to connect the power supply. The vehicle-mounted power supply can be used for power supply in the car, and the commonly used DC power supply can also be used for power supply at home.

[0043] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0044] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A portable Stirling ultra-low temperature thermostat, characterized in that: include: A box body, wherein a refrigeration chamber and a control chamber are arranged side by side inside the box body; A Stirling cooler is installed on a support frame inside the control cavity, a heat preservation cold head is installed on the top of the Stirling cooler, and a cooling pipe connected to the heat preservation cold head is arranged around the outer side of the refrigeration cavity; A heat insulation structure is arranged between the refrigeration cavity and the inner wall of the box body, the heat insulation structure comprises a glass fiber board arranged outside the refrigeration cavity, a cooling pipe is embedded in the glass fiber board, a first glass wool insulation layer is arranged outside the glass fiber board, and a polyurethane foam layer is arranged outside the first glass wool insulation layer; A box cover is arranged on the upper side of the refrigeration chamber, and one side of the box cover is flip-connected with the box body; A connecting pipe is transversely installed in the side wall of one side of the box body, and one end of the connecting pipe extends into the refrigerating chamber to connect the refrigerating chamber with the outside of the box body; A sealing plug is detachably mounted on the outward end of the connecting pipe to seal the connecting pipe, a vent hole is arranged inside the sealing plug, a placement cavity is arranged at the end of the vent hole away from the refrigerating cavity, a sealing ball is placed in the placement cavity, and the sealing ball is used to seal the vent hole under the action of negative pressure in the refrigerating cavity when the refrigerating cavity is refrigerated; The temperature probe is used to be inserted into the connecting pipe after the sealing plug is removed from the connecting pipe and extends into the refrigerating chamber to monitor the temperature.

2. The portable Stirling ultra-low temperature constant temperature box according to claim 1 is characterized in that: A detachable battery pack assembly is installed at the bottom of the box, and the battery pack assembly includes a battery pack and a bottom plate arranged on one side of the battery pack. A conductive connection socket is installed at one end of the battery pack. The battery pack is projected within the range of the bottom plate. The bottom plate is arranged flush with the bottom of the box. When the bottom plate is assembled with the box, the conductive connection socket of the battery pack is connected to the conductive plug in the control cavity.

3. The portable Stirling ultra-low temperature constant temperature box according to claim 1 is characterized in that: A second glass wool heat insulation layer is installed inside the box cover.

4. The portable Stirling ultra-low temperature constant temperature box according to claim 1, characterized in that: The cooling pipe is arranged obliquely on each outer side wall of the refrigerating chamber.

5. The portable Stirling ultra-low temperature constant temperature box according to claim 1, characterized in that: The temperature probe is cylindrical, and its outer diameter matches the inner diameter of the connecting pipe, so that the outer wall of the temperature probe is closely attached to the inner wall of the connecting pipe.

6. The portable Stirling ultra-low temperature constant temperature box according to claim 1, characterized in that: The outward end surface of the sealing plug is densely covered with air-permeable perforations, and the placement cavity is located between the air-permeable perforations and the vent holes.

7. The portable Stirling ultra-low temperature constant temperature box according to claim 1, characterized in that: A dry deodorant placement box is arranged on the side wall of the refrigerating chamber.

8. The portable Stirling ultra-low temperature constant temperature box according to claim 1, characterized in that: The bottom of the outer wall of the control cavity is provided with a vehicle-mounted 12V power socket and a 110V-220V AC power socket side by side.

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