Intelligent adjusting constant-temperature refrigeration equipment

Abstract

A device body comprises a base, a refrigerating and heating all-in-one machine and an adjusting assembly, the refrigerating and heating all-in-one machine is arranged on the upper surface of the base, and the refrigerating and heating all-in-one machine comprises an outer shell arranged on the upper surface of the base; the compressor, the evaporator, the condenser and the expansion valve are arranged in the outer shell, and a control panel and an air outlet are arranged on the front face of the refrigerating and heating all-in-one machine. The adjusting assembly for adjusting the air outlet angle of the air outlet of the refrigeration and heating all-in-one machine comprises a rectangular groove formed in the upper surface of the base, and the angle of the refrigeration and heating all-in-one machine can be adjusted through the adjusting assembly in the actual use process of the refrigeration and heating all-in-one machine. According to the air conditioner, the air outlet can discharge air upwards, and the effect of uniform refrigeration of the space is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of integrated refrigeration and heating machines, and in particular to an intelligent temperature-adjustable refrigeration device. Background Art

[0002] Intelligent adjustable constant temperature refrigeration equipment is a device that combines intelligent control and efficient refrigeration technology. It is mainly used to adjust and maintain the indoor temperature within the set range. It also has cooling and heating functions. The intelligent adjustable constant temperature refrigerator achieves intelligent adjustment through an advanced control system. It uses temperature sensors and intelligent algorithms to automatically adjust the cooling or heating function according to changes in indoor temperature and humidity to ensure that the indoor temperature always remains within a comfortable range. In addition, it can also be intelligently adjusted according to user behavior habits and needs to reduce energy waste.

[0003] Among them, the integrated cooling and heating machine is a type of intelligent constant temperature refrigeration equipment. It uses an advanced control system and can automatically adjust the indoor temperature according to user needs to achieve warmth in winter and coolness in summer. Compared with traditional single-function equipment such as air conditioners and heaters, the integrated cooling and heating machine has a higher cost performance and a wider range of applications. Its working principle is to achieve multiple functions such as air conditioning, cooling, heating and hot water by changing the different processes of refrigerant in the water heat exchanger, condenser and evaporator. The heat pump system consists of two systems, each of which is controlled by a computer PC board, and automatically adjusts heating or cooling through the heat transfer oil circulation according to process requirements.

[0004] Regarding the above-mentioned related technologies, the inventor believes that the following defects exist: although the existing integrated cooling and heating machines have the advantages of being portable and compact when used in home life or office environments, in actual use, the air outlet position of the integrated cooling and heating machines is relatively fixed and close to the ground. Due to the high density of cold air, it will fall to the ground after being discharged from the integrated cooling and heating machines, resulting in lower temperatures in the lower parts of the space and higher temperatures in the higher parts, making it impossible to achieve uniform cooling of the space. Summary of the invention

[0005] In order to improve the problem of uniform cooling of a space during the refrigeration process, the present application provides an intelligent temperature-adjusting refrigeration equipment.

[0006] The present application provides an intelligent temperature-controlled refrigeration device that adopts the following technical solutions:

[0007] An intelligent constant temperature regulating refrigeration equipment comprises a device body, wherein the device body comprises a base, a refrigeration and heating integrated machine and an adjusting component;

[0008] The integrated refrigeration and heating machine is arranged on the upper surface of the base, and the integrated refrigeration and heating machine comprises an outer shell arranged on the upper surface of the base, and a compressor, an evaporator, a condenser and an expansion valve respectively arranged inside the outer shell, and a control panel and an air outlet are respectively arranged on the front of the integrated refrigeration and heating machine;

[0009] The adjustment component is used to adjust the air outlet angle of the cooling and heating integrated machine. The adjustment component includes a rectangular groove opened on the upper surface of the base, and a motor fixed on the inner wall of the rectangular groove. A threaded column is fixed on the output end of the motor, and a slider is slidably arranged on the inner wall of the rectangular groove. A threaded hole is opened on the surface of the slider and is threadedly connected to the outer surface of the threaded column. A push rod is rotatably arranged on the surface of the slider, and the top end of the push rod is rotatably connected to the lower surface of the outer shell.

[0010] By adopting the above technical solution, the compressor, evaporator, condenser and expansion valve in the integrated refrigeration and heating machine realize efficient hot and cold cycle regulation to meet the temperature control requirements in different scenarios. The adjustment component drives the slider to rotate through the motor, thereby controlling the air outlet angle, so that the airflow can be accurately adjusted according to user needs to achieve the ideal cooling or heating effect. The control panel facilitates users to directly operate the equipment, further improving the convenience and intelligence of the equipment, and realizing efficient and flexible control of ambient temperature and wind direction, providing users with an efficient and comfortable temperature control solution.

[0011] Optionally, a rotation bar is fixedly provided on the lower surface of the outer shell, and a rotation frame is fixedly provided on the upper surface of the base, and the rotation bar is rotatably connected to the inner wall of the rotation frame.

[0012] By adopting the above technical solution, the outer shell can be rotated on the upper surface of the base through the rotating bar.

[0013] Optionally, a heat dissipation component for dissipating heat inside the refrigeration and heating integrated machine is provided inside the outer shell, and the heat dissipation component includes two heat exchange coils symmetrically fixed on the inner wall of the outer shell, and the two heat exchange coils are connected to each other, and heat dissipation holes are opened on both side surfaces of the outer shell.

[0014] By adopting the above technical solution, the purpose of heat exchange with the internal heat of the outer shell can be achieved through the cooling water flowing in the heat exchange coil.

[0015] Optionally, the heat dissipation component further includes a liquid storage cavity opened inside the base, and a refrigerator and a water pump respectively fixed on the bottom wall of the liquid storage cavity.

[0016] By adopting the above technical solutions, the intelligent adjustable constant temperature refrigeration equipment can achieve efficient liquid cooling through the refrigerator and water pump in the liquid storage chamber, enhance the thermal management capability of the equipment, and ensure that the refrigeration and heating integrated machine maintains a stable temperature control effect under long-term operation, thereby improving the heat dissipation efficiency and service life of the equipment and providing more reliable temperature control performance.

[0017] Optionally, the liquid outlet of the water pump is provided with a liquid infusion tube extending to the inside of the outer shell, and the end of the liquid infusion tube is connected to a heat exchange coil, and the liquid outlet of the other heat exchange coil is provided with a reflux tube extending to the inside of the liquid storage cavity.

[0018] By adopting the above technical solution, the cooling liquid in the liquid storage chamber can be easily transported to the inside of the heat exchange coil through the liquid infusion tube.

[0019] Optionally, a connecting tube is provided on the surface of the infusion tube, and an L-shaped blowing tube extending to the inside of the outer shell is provided at the top end of the connecting tube.

[0020] By adopting the above technical solution, air can be blown to the interior of the outer shell through the L-shaped air blowing pipe.

[0021] Optionally, the inner bottom wall of the connecting tube is rotatably provided with a rotating shaft extending into the L-shaped air blowing pipe, and the outer surface of the rotating shaft located inside the connecting tube is provided with an impeller, and the surface of the rotating shaft located inside the L-shaped air blowing pipe is provided with blowing fan blades.

[0022] By adopting the above technical solution, the impeller can be driven to rotate by the flow of the coolant, thereby driving the rotating shaft and the blowing fan blades to rotate.

[0023] Optionally, an air inlet mesh pipe is fixedly provided at the bottom end of the L-shaped air blowing pipe, and the bottom end of the air inlet mesh pipe is fixedly connected to the upper surface of the connecting tube.

[0024] By adopting the above technical solution, external air can enter the interior of the L-shaped air blowing pipe through the air inlet mesh pipe, and dust and debris in the air can be intercepted at the same time.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. This application sets an adjustment component so that the angle of the refrigeration and heating all-in-one machine can be adjusted during actual use, so that the air outlet can discharge air upwards to achieve uniform cooling of the space.

[0027] 2. The present application sets a heat dissipation component so that during actual use of the refrigeration and heating machine, the water pump can be started to achieve the purpose of circulating water pump heat dissipation for the refrigeration and heating machine, and the purpose of blowing heat dissipation can be achieved, thereby enabling the refrigeration and heating machine to achieve air cooling during water cooling when it is running. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the three-dimensional structure of an intelligent temperature-adjustable refrigeration equipment according to an embodiment of the present application.

[0029] Figure 2 This is a schematic diagram of the internal structure of an outer shell of an intelligent temperature-adjustable refrigeration equipment according to an embodiment of the present application.

[0030] Figure 3 This is a schematic diagram of the cross-sectional structure of a base of an intelligently adjustable constant temperature refrigeration equipment according to an embodiment of the present application.

[0031] Figure 4 This is a schematic diagram of the cross-sectional structure of a connecting tube and an L-shaped air blowing pipe of an intelligently adjustable constant temperature refrigeration equipment according to an embodiment of the present application.

[0032] Figure 5 For this application Figure 4 Enlarged structural diagram at A in the middle.

[0033] Explanation of the reference numerals: 100, base; 200, integrated cooling and heating machine; 201, outer shell; 202, compressor; 203, evaporator; 204, condenser; 205, air outlet; 300, adjustment component; 301, motor; 302, threaded column; 303, slider; 304, push rod; 305, rotating bar; 400, heat dissipation component; 401, heat exchange coil; 402, heat dissipation hole; 403, liquid storage chamber; 404, refrigerator; 405, water pump; 406, infusion tube; 407, connecting tube; 408, L-shaped air blowing pipe; 409, rotating shaft; 4010, impeller; 4011, fan blades; 4012, air inlet network pipe; 500, equipment body. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-5 This application is described in further detail.

[0035] The embodiment of the present application discloses an intelligent temperature-regulating refrigeration device.

[0036] Example 1

[0037] Reference Figures 1 to 5 , an intelligent temperature-adjusting refrigeration equipment, comprising: a device body 500 including a base 100, a refrigeration and heating integrated machine 200 and an adjustment component 300;

[0038] The integrated refrigeration and heating machine 200 is arranged on the upper surface of the base 100. The integrated refrigeration and heating machine 200 includes an outer shell 201 arranged on the upper surface of the base 100, and a compressor 202, an evaporator 203, a condenser 204 and an expansion valve respectively arranged inside the outer shell 201. The front of the integrated refrigeration and heating machine 200 is respectively provided with a control panel and an air outlet 205; the outer shell of the intelligent adjustable constant temperature refrigeration equipment ensures the compact arrangement and stable operation of each component, and the user can conveniently operate the equipment through the control panel to adjust parameters such as temperature and wind speed to meet different usage requirements. The setting of the air outlet further enhances the air circulation, so that the airflow can effectively cover the required space, provide a comfortable environmental temperature control experience, and realize efficient temperature control management. Combined with the compressor, evaporator, condenser and expansion valve in the integrated refrigeration and heating machine, the circulation of cold and hot airflows is accurately adjusted to achieve rapid response to cooling or heating;

[0039] The adjustment component 300 is used to adjust the air outlet angle of the air outlet 205 of the cooling and heating machine 200. The adjustment component 300 includes a rectangular groove opened on the upper surface of the base 100, and a motor 301 fixed on the inner wall of the rectangular groove. A threaded column 302 is fixed at the output end of the motor 301, and a slider 303 is slidably arranged on the inner wall of the rectangular groove. A threaded hole threadedly connected to the outer surface of the threaded column 302 is opened on the surface of the slider 303. A push rod 304 is rotatably arranged on the surface of the slider 303, and the top end of the push rod 304 is rotatably connected to the lower surface of the outer shell 201.

[0040] Reference Figure 3 A rotating bar 305 is fixedly provided on the lower surface of the outer shell 201, and a rotating frame is fixedly provided on the upper surface of the base 100, and the rotating bar 305 is rotatably connected to the inner wall of the rotating frame. Specifically, by setting the rotating bar 305, the outer shell 201 can be rotated on the upper surface of the base 100. The cooperation of the rotating bar 305 and the rotating frame enables the outer shell 201 to be flexibly rotated on the upper surface of the base 100, so that the entire refrigeration and heating integrated machine 200 can adjust its direction as needed, further optimize the distribution of airflow, and the rotatable connection between the rotating bar 305 and the rotating frame makes the rotation of the outer shell more stable and stable, avoiding shaking or deviation caused by rotation, ensuring long-term stable operation of the equipment, and effectively improving the adjustment accuracy and flexibility of the equipment, so that the user can easily change the direction of the air outlet according to specific environmental requirements, thereby optimizing the air circulation effect and improving the accuracy and comfort of the refrigeration and heating effects.

[0041] In this embodiment, by setting the adjustment component 300, the angle of the refrigeration and heating machine 200 can be adjusted during actual use, so that the air outlet 205 can discharge air upward to achieve uniform cooling of the space.

[0042] Example 2

[0043] Based on Example 1, Figure 2 The outer shell 201 is provided with a heat dissipation component 400 for dissipating heat inside the integrated cooling and heating machine 200. The heat dissipation component 400 includes two heat exchange coils 401 symmetrically fixed on the inner wall of the outer shell 201, and the two heat exchange coils 401 are connected to each other. Heat dissipation holes 402 are provided on both sides of the outer shell 201. Specifically, by providing the heat exchange coils 401, the purpose of heat exchange with the inner heat of the outer shell 201 can be achieved through the cooling water flowing in the heat exchange coils 401. By providing the heat exchange coils 401 and the heat dissipation holes 402 inside the outer shell 201, the heat dissipation component 400 can efficiently dissipate heat from the integrated cooling and heating machine 20 0 is used to dissipate the heat generated inside. The cooling water circulating in the heat exchange coil 401 achieves effective heat absorption and conduction through heat exchange with the inner wall of the outer shell 201, thereby reducing the internal temperature of the equipment and preventing overheating from causing adverse effects on the performance and service life of the equipment. The two interconnected heat exchange coils make the heat exchange process more uniform and efficient, and enhance the heat dissipation effect. The heat dissipation holes 402 further accelerate the release of heat, improve the heat dissipation efficiency, ensure the stability and efficiency of the equipment during long-term operation, and improve the thermal management ability of the refrigeration and heating integrated machine as a whole. It maintains a better operating state during the working process and ensures the efficiency and reliability of the equipment.

[0044] Reference Figure 3 The heat dissipation component 400 also includes a liquid storage chamber 403 opened inside the base 100, and a refrigerator 404 and a water pump 405 respectively fixed on the bottom wall of the liquid storage chamber 403. The liquid outlet of the water pump 405 is provided with a liquid infusion pipe 406 extending to the inside of the outer shell 201, and the end of the liquid infusion pipe 406 is connected to a heat exchange coil 401, and the liquid outlet of the other heat exchange coil 401 is provided with a reflux pipe extending to the inside of the liquid storage chamber 403. Specifically, by providing the liquid infusion pipe 406, it is convenient to transport the cooling liquid in the liquid storage chamber 403 to the inside of the heat exchange coil 401. Through the liquid infusion pipe 406 and its connection with the heat exchange coil 401, the heat dissipation component 400 can realize the flow of cooling liquid from the liquid storage chamber 403 to the inside of the heat exchange coil 401, effectively improving the heat exchange efficiency. The water pump 405 draws the cooling liquid from the liquid storage chamber 403 and transports it to the heat exchange coil 401. The cooling liquid flowing inside the heat exchange coil exchanges heat with the outer shell 201, quickly absorbs and takes away the internal heat to prevent the equipment from overheating. The reflux pipe ensures the circulation of the cooling liquid to achieve the effect of continuous heat dissipation, which greatly improves the heat dissipation capacity of the refrigeration and heating machine, ensures that the equipment maintains a stable temperature during long-term operation, avoids performance degradation or damage caused by overheating, and improves the working efficiency, service life and reliability of the equipment.

[0045] Reference Figure 4 and Figure 5 A connecting tube 407 is provided on the surface of the infusion tube 406, and an L-shaped air blowing tube 408 extending to the inside of the outer shell 201 is provided on the top of the connecting tube 407. Specifically, by providing the L-shaped air blowing tube 408, air can be blown to the inside of the outer shell 201 through the L-shaped air blowing tube 408. By providing the L-shaped air blowing tube 408, the airflow generated by the flow of coolant is guided to the inside of the outer shell 201 through the infusion tube 406, so as to achieve the heat dissipation of the inside of the outer shell by blowing, so that the airflow can evenly cover the inside of the outer shell, enhance the conduction and dissipation of heat, and thus improve the heat dissipation efficiency of the equipment. The air blowing tube optimizes the airflow direction and coverage range, ensures that the heat in the outer shell is quickly released, avoids overheating and causes performance degradation or damage to the equipment, effectively improves the overall performance of the heat dissipation system, and enhances the stability and reliability of the refrigeration and heating all-in-one machine 200 during long-term operation.

[0046] Reference Figure 5 The inner bottom wall of the connecting tube 407 is rotatably provided with a rotating shaft 409 extending to the inside of the L-shaped air blowing pipe 408, and the outer surface of the rotating shaft 409 located inside the connecting tube 407 is provided with an impeller 4010, and the surface of the rotating shaft 409 located inside the L-shaped air blowing pipe 408 is provided with a blowing fan blade 4011. Specifically, by providing the impeller 4010, the impeller 4010 can be driven to rotate by the flow of the coolant, thereby driving the rotating shaft 409 and the blowing fan blade 4011 to rotate, and through the impeller 4010, the flow of the coolant can be The impeller 4010 is effectively driven to rotate, thereby driving the rotating shaft 409 and the blowing fan blades 4011 to rotate, forming air flow, so that the flow of coolant can not only perform heat exchange, but also push the air into the L-shaped blowing pipe 408 through the rotation of the blowing fan blades, and strongly blow air to the inside of the outer shell 201 through the blowing pipe. The rotation of the impeller 4010 is driven by fluid power, which avoids additional power consumption and improves the energy efficiency of the equipment. At the same time, it enhances the effect of heat dissipation, ensuring that the temperature inside the outer shell is balanced and the heat dissipation is rapid.

[0047] Reference Figure 5The bottom end of the L-shaped air blowing pipe 408 is fixedly provided with an air inlet mesh pipe 4012, and the bottom end of the air inlet mesh pipe 4012 is fixedly connected to the upper surface of the connecting tube 407. Specifically, by setting the air inlet mesh pipe 4012, it is convenient for external air to enter the interior of the L-shaped air blowing pipe 408, and at the same time, it can intercept dust and debris in the air. The air inlet mesh pipe 4012 can effectively guide external air to enter the interior of the L-shaped air blowing pipe 408, and at the same time, the mesh pipe is used to filter dust and debris in the air to prevent these impurities from entering the interior of the equipment, keeping the interior of the equipment clean, ensuring the smooth inflow of external air, enhancing the blowing effect, and effectively avoiding dust and particulate matter from damaging the heat dissipation system and internal components, thereby improving the stability and operation efficiency of the equipment. The air inlet mesh pipe improves the anti-pollution ability of the equipment, extends its service life, and ensures that the equipment maintains a high heat dissipation efficiency during long-term operation, thereby optimizing the temperature control effect and ensuring the long-term stability of the equipment performance.

[0048] In this embodiment, by setting up a heat dissipation component 400, the refrigeration and heating machine 200 can start the water pump 405 during actual use to achieve the purpose of circulating heat dissipation of the refrigeration and heating machine 200, and can also achieve the purpose of blowing heat dissipation, so that the refrigeration and heating machine 200 can achieve air cooling in the process of water cooling when it is running.

[0049] The working principle of an intelligent constant temperature refrigeration device according to the embodiment of the present application is as follows: during actual use, the integrated refrigeration and heating machine 200 can, according to actual conditions, drive the threaded column 302 to rotate through the rotation of the motor 301, and the rotation of the threaded column 302 drives the slider 303 to move, and the movement of the slider 303 drives the push rod 304 to push the outer shell 201, so that the outer shell 201 rotates through the rotating bar 305, thereby adjusting the angle of the integrated refrigeration and heating machine 200, so that the air outlet 205 can discharge air upward, realizing uniform cooling of the space, and can start the water pump 405 to transport the coolant in the liquid storage chamber 403 to the two heat exchange coils 40 through the infusion tube 406. 1, the heat generated inside the outer shell 201 is quickly exchanged, and then the coolant flows back into the liquid storage chamber 403 and is cooled by the refrigerator 404, and then circulated again, so as to achieve the purpose of circulating heat dissipation of the cooling and heating machine 200, and when the water flows inside the infusion tube 406, it can drive the impeller 4010 in the connecting tube 407 to rotate, and the rotation of the impeller 4010 drives the rotating shaft 409 to rotate, and the rotation of the rotating shaft 409 drives the fan blades 4011 to rotate, so that the L-shaped blowing pipe 408 blows air to the inside of the outer shell 201, so as to achieve the purpose of blowing heat dissipation, and then the cooling and heating machine 200 can achieve air cooling in the process of water cooling when it is running.

[0050] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An intelligent constant temperature refrigeration device, comprising a device body (500), characterized in that: The device body (500) comprises a base (100), a cooling and heating integrated machine (200) and an adjustment component (300); The integrated refrigeration and heating machine (200) is arranged on the upper surface of the base (100), and the integrated refrigeration and heating machine (200) comprises an outer shell (201) arranged on the upper surface of the base (100), and a compressor (202), an evaporator (203), a condenser (204), and an expansion valve respectively arranged inside the outer shell (201), and a control panel and an air outlet (205) are respectively arranged on the front of the integrated refrigeration and heating machine (200); The adjustment component (300) is used to adjust the air outlet angle of the air outlet (205) of the cooling and heating integrated machine (200), and the adjustment component (300) comprises a rectangular groove provided on the upper surface of the base (100), and a motor (301) fixedly arranged on the inner wall of the rectangular groove, a threaded column (302) being fixedly arranged at the output end of the motor (301), and a slider (303) being slidably arranged on the inner wall of the rectangular groove, a threaded hole being provided on the surface of the slider (303) being threadedly connected to the outer surface of the threaded column (302), a push rod (304) being rotatably arranged on the surface of the slider (303), and the top end of the push rod (304) being rotatably connected to the lower surface of the outer shell (201).

2. The intelligent temperature regulating refrigeration equipment according to claim 1, characterized in that: A rotating bar (305) is fixedly provided on the lower surface of the outer shell (201), and a rotating frame is fixedly provided on the upper surface of the base (100), and the rotating bar (305) is rotatably connected to the inner wall of the rotating frame.

3. The intelligent temperature regulating refrigeration equipment according to claim 1, characterized in that: A heat dissipation component (400) for dissipating heat inside the integrated refrigeration and heating machine (200) is arranged inside the outer shell (201), and the heat dissipation component (400) comprises two heat exchange coils (401) symmetrically fixed on the inner wall of the outer shell (201), and the two heat exchange coils (401) are interconnected, and heat dissipation holes (402) are provided on both side surfaces of the outer shell (201).

4. The intelligent temperature regulating refrigeration equipment according to claim 3, characterized in that: The heat dissipation component (400) further comprises a liquid storage cavity (403) opened inside the base (100), and a refrigerator (404) and a water pump (405) respectively fixed on the inner bottom wall of the liquid storage cavity (403).

5. The intelligent temperature regulating refrigeration equipment according to claim 4, characterized in that: The liquid outlet end of the water pump (405) is provided with a liquid infusion tube (406) extending into the interior of the outer shell (201), and the end of the liquid infusion tube (406) is connected to one heat exchange coil (401), and the liquid outlet end of the other heat exchange coil (401) is provided with a reflux tube extending into the interior of the liquid storage chamber (403).

6. The intelligent constant temperature refrigeration equipment according to claim 5, characterized in that: A connecting tube (407) is provided on the surface of the infusion tube (406), and an L-shaped air blowing tube (408) extending to the interior of the outer shell (201) is provided at the top end of the connecting tube (407).

7. The intelligent temperature regulating refrigeration equipment according to claim 6, characterized in that: The inner bottom wall of the connecting tube (407) is rotatably provided with a rotating shaft (409) extending to the inside of the L-shaped air blowing pipe (408), and the outer surface of the rotating shaft (409) located inside the connecting tube (407) is provided with an impeller (4010), and the surface of the rotating shaft (409) located inside the L-shaped air blowing pipe (408) is provided with a blowing fan blade (4011).

8. The intelligent temperature regulating refrigeration equipment according to claim 7, characterized in that: An air inlet mesh pipe (4012) is fixedly provided at the bottom end of the L-shaped air blowing pipe (408), and the bottom end of the air inlet mesh pipe (4012) is fixedly connected to the upper surface of the connecting tube (407).

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