Low noise compressor unit for high and low temperature environmental test chamber

Abstract

The utility model belongs to test box technical field discloses high and low temperature environment test box low noise compressor unit, including base and two compressors, the top of base is fixedly connected with the box, two compressors are located below the inside of box, the below of base inside is fixedly connected with four telescopic links, in the utility model, the telescopic link of base inside and the outer wall sleeve connection's first spring constitute primary damping, can directly absorb the vertical direction vibration energy of compressor operation generation, the fixed link outer wall's first moving block, second spring and first connecting rod form secondary damping, can convert the horizontal, tilt vibration of compressor into the sliding of first moving block, offset vibration kinetic energy through the elastic deformation of second spring, the second moving block of fixed link middle part, third spring and second connecting rod constitute third heavy damping, with the concentric rotation of second connecting rod and first connecting rod, pass the remaining vibration to second moving block, further absorb energy through the telescopic of third spring.

Description

Technical Field

[0001] This utility model relates to the field of test chamber technology, specifically a low-noise compressor unit for a high and low temperature environment test chamber. Background Technology

[0002] High and low temperature environmental test chambers are important testing equipment with wide applications in aerospace, materials science, electrical and electronic fields. Because the test equipment needs to operate at low temperatures, the compressor becomes the source of cooling for the equipment. However, the noise of the compressor unit is also the main source of equipment noise. Existing equipment technology can no longer meet the needs of users in terms of compressor noise reduction.

[0003] Chinese Patent Announcement No. CN204412277U discloses a high and low temperature humidity test chamber with rapid temperature rise and fall, including a test chamber body and a unit body. The test chamber body and the unit body are set separately. The test chamber body is equipped with a controller, a humidification device, a heating device and an airflow circulation tank. The unit body includes a compressor and a condenser, with the condenser located above the compressor.

[0004] In practical use, existing technologies lack vibration damping mechanisms for compressors, resulting in vibrations and noise during compressor operation. This noise can interfere with the work mood of staff, causing inconvenience and limiting their use. Therefore, this invention designs a low-noise compressor unit for high and low temperature environmental test chambers to solve the above problems. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the existing technology, this utility model provides a low-noise compressor unit for high and low temperature environment test chamber.

[0006] To achieve the above objectives, a low-noise compressor unit for a high and low temperature environment test chamber is designed, comprising a base and two compressors. A chamber body is fixedly connected to the top of the base, and the two compressors are located at the lower part of the chamber body. Four telescopic rods are fixedly connected to the lower part of the base, and a stainless steel square tube is fixedly connected to the top of every two telescopic rods. Every two stainless steel square tubes are fixedly connected to both sides below the compressors. A No. 1 spring is sleeved on the outer wall of the telescopic rods. Four fixing rods are fixedly connected to the lower part of the base, and the four fixing rods are located below the four stainless steel square tubes.

[0007] Furthermore, a first moving block is slidably connected to both sides of the outer wall of the fixed rod, and a second spring is fixedly connected to one side of each of the two first moving blocks. The end of the second spring away from the first moving block is fixedly connected to the end of the fixed rod.

[0008] Furthermore, a connecting rod is rotatably connected above the first moving block, and the end of the first connecting rod away from the first moving block is rotatably connected to the bottom of the stainless steel square tube.

[0009] Furthermore, two moving blocks are slidably connected to both sides of the middle part of the outer wall of the fixed rod, and a third spring is fixedly connected between the two moving blocks. A second connecting rod is rotatably connected above the moving blocks, and the end of the second connecting rod away from the moving blocks is concentrically rotatably connected to the end of the first connecting rod away from the moving blocks.

[0010] Furthermore, both the second and third springs are sleeved on the outer wall of the fixed rod.

[0011] Furthermore, the exterior of the enclosure is fitted with a soundproof panel.

[0012] Furthermore, a control panel is installed on one side of the enclosure, and a door is rotatably connected to one side of the enclosure.

[0013] Furthermore, a compressor frequency control inverter is installed on one side of the housing.

[0014] Compared with the prior art, this utility model has the following advantages: 1. The telescopic rod inside the base of this utility model and the No. 1 spring sleeved on the outer wall constitute primary shock absorption, which can directly absorb the vertical vibration energy generated by the operation of the compressor and prevent the vibration from being directly transmitted to the base and the external mounting surface; the No. 1 moving block, the No. 2 spring and the No. 1 connecting rod on the outer wall of the fixed rod form secondary shock absorption, which can convert the horizontal and tilting vibration of the compressor into the sliding of the No. 1 moving block, and the elastic deformation of the No. 2 spring cancels the vibration kinetic energy; the No. 2 moving block, the No. 3 spring and the No. 2 connecting rod in the middle of the fixed rod form the third layer of shock absorption. With the concentric rotation of the No. 2 connecting rod and the No. 1 connecting rod, the remaining vibration is transmitted to the No. 2 moving block, and the energy is further absorbed by the extension and contraction of the No. 3 spring.

[0015] 2. The soundproof enclosure installed on the outside of the enclosure of this utility model can build a physical soundproof barrier on the outside of the equipment, further blocking the transmission of noise from inside the enclosure to the outside.

[0016] 3. The compressor frequency control inverter installed on one side of the chamber of this utility model can dynamically adjust the operating frequency of the compressor according to the actual cooling needs of the high and low temperature environment test chamber: when the test chamber needs to cool down quickly, the compressor frequency is increased to enhance the cooling capacity; after the target temperature is reached, the compressor frequency is reduced to maintain a constant temperature. This adjustment method avoids the compressor from running at full load for a long time, reduces mechanical wear and noise under high load, and extends the service life of the compressor. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the box in this utility model; Figure 3 This is a schematic diagram showing the connection relationship between the housing and the soundproof enclosure in this utility model; Figure 4 This is a schematic diagram of the buffer component structure in this utility model; Figure 5 for Figure 4 A magnified structural diagram of region A in the middle.

[0018] In the diagram: 1. Base; 10. Cabinet; 11. Soundproof enclosure; 12. Telescopic rod; 13. Stainless steel square tube; 14. Spring No. 1; 15. Fixing rod; 16. Moving block No. 1; 17. Spring No. 2; 18. Moving block No. 2; 19. Spring No. 3; 2. Connecting rod No. 1; 21. Connecting rod No. 2; 22. Cabinet door; 23. Control panel; 24. Compressor frequency control inverter. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0020] The present invention will be further described below with reference to the accompanying drawings: In some embodiments, please refer to the appendix to the instruction manual. Figures 1-5 The high and low temperature environment test chamber low noise compressor unit includes a base 1 and two compressors 25. A chamber 10 is fixedly connected to the top of the base 1. The two compressors 25 are located inside the lower part of the chamber 10. Four telescopic rods 12 are fixedly connected to the lower part of the interior of the base 1. A stainless steel square tube 13 is fixedly connected above every two telescopic rods 12. Every two stainless steel square tubes 13 are fixedly connected to both sides below the compressors 25. A first spring 14 is sleeved on the outer wall of the telescopic rod 12. Four fixed rods 15 are fixedly connected to the lower part of the interior of the base 1. The four fixed rods 15 are located below the four stainless steel square tubes 13. A first moving block 16 is slidably connected to both sides of the outer wall of the fixed rod 15. A second spring 17 is fixedly connected to one side of each of the two first moving blocks 16. The end of the second spring 17 away from the first moving block 16 is fixedly connected to the end of the fixed rod 15. A first connecting rod 2 is rotatably connected above the first moving block 16. The end of the first connecting rod 2 away from the first moving block 16 is rotatably connected to the lower part of the stainless steel square tube 13.

[0021] In this embodiment, the four telescopic rods 12 fixed inside the lower part of the base 1, with the first spring 14 sleeved on their outer wall, form the first layer of shock absorption. When the two compressors 25 vibrate vertically inside the housing 10, the telescopic rods 12 can flexibly extend and retract with the amplitude of the vibration. In conjunction with the elastic deformation of the first spring 14, they directly absorb the vibration energy transmitted from the compressors 25 to the bottom, preventing the vibration from being directly transmitted to the base 1 and the external mounting surface, thus reducing the structural noise caused by vibration from the source. At the same time, the stainless steel square tubes 13 fixed above each pair of telescopic rods 12 can evenly distribute the weight of the compressors 25 to the telescopic rods 12, ensuring that the first spring 14 is subjected to balanced force, avoiding shock absorption failure caused by local overload, and further improving the stability of the primary shock absorption.

[0022] The four fixed rods 15 located below the stainless steel square tube 13 inside the base 1, along with the first movable block 16, the second spring 17, and the first connecting rod 2, work together to form a second shock absorption system. When the compressor 25 vibrates horizontally or tilted, the vibration is transmitted to the first connecting rod 2 through the stainless steel square tube 13. Because the first connecting rod 2 is rotatably connected to the stainless steel square tube 13 and the first movable block 16 at both ends, it can convert the vibration into a second shock absorption system. When the first moving block 16 slides horizontally along the fixed rod 15, the second spring 17 absorbs the sliding kinetic energy of the first moving block 16 through its own extension and contraction, further offsetting the vibration energy. When the compressor 25 shifts to one side, the first moving block 16 on the same side compresses the second spring 17, and the first moving block 16 on the other side stretches the second spring 17. The bidirectional elasticity of the second spring 17 can quickly balance the vibration impact force, avoid the accumulation of vibration inside the equipment, reduce the mechanical noise caused by vibration, and meet the requirements of low-noise environment in laboratories, electronic component testing, etc.

[0023] In some embodiments, please refer to the appendix to the instruction manual. Figures 1-5 The high and low temperature environment test chamber has a low noise compressor unit. The middle of the outer wall of the fixed rod 15 is slidably connected to the second moving block 18 on both sides. The two second moving blocks 18 are fixedly connected to the third spring 19. The second connecting rod 21 is rotatably connected above the second moving block 18. The end of the second connecting rod 21 away from the second moving block 18 and the end of the first connecting rod 2 away from the first moving block 16 are concentrically rotatably connected. The second spring 17 and the third spring 19 are both sleeved on the outer wall of the fixed rod 15. The outside of the chamber 10 is equipped with a sound insulation panel 11. The control panel 23 is installed on one side of the chamber 10. The chamber door 22 is rotatably connected to one side of the chamber 10. The compressor frequency control inverter 24 is installed on one side of the chamber 10.

[0024] In this embodiment, the second movable blocks 18 slidably connected to both sides of the middle of the outer wall of the fixed rod 15, and the third spring 19 fixed between the two second movable blocks 18, together with the second connecting rod 21, constitute the third level of shock absorption. When the compressor 25 vibrates during operation, the vibration is transmitted to the first connecting rod 2 via the stainless steel square tube 13. While the first connecting rod 2 drives the first movable block 16 to slide, it pushes the second movable block 18 to slide along the fixed rod 15 through the concentrically rotating second connecting rod 21. If the vibration of the compressor 25 causes the first connecting rod 2 to tilt towards the middle of the fixed rod 15, the second connecting rod 21 will pull the two second movable blocks 18 closer to each other, compressing the third spring 19; if the first connecting rod 2 tilts towards the end of the fixed rod 15, the second connecting rod 21 will pull the two second movable blocks 18 closer to each other, compressing the third spring 19; if the first connecting rod 2 tilts towards the end of the fixed rod 15, the second connecting rod 21 will... This pushes the two moving blocks 18 on both sides away from each other, stretching the third spring 19. The third spring 19 absorbs vibration energy through its own elastic deformation, forming a multi-stage damping system with the first spring 14 and the second spring 17, further weakening the transmission of vibration inside the equipment, avoiding component resonance caused by vibration, and reducing the additional noise generated by resonance. The soundproof enclosure 11 installed on the outside of the chamber 10 can build a physical soundproof barrier outside the equipment. On the one hand, it can directly block the mechanical noise generated by the compressor 25 inside the chamber 10 from spreading outward, reducing the noise interference to the surrounding environment. The compressor frequency control inverter 24 installed on one side of the chamber 10 can dynamically adjust the operating frequency of the compressor 25 according to the actual cooling needs of the high and low temperature environment test chamber.

[0025] Working principle: The base 1 serves as the overall support foundation for the equipment. The box 10 fixed above it provides a closed installation space for the two compressors 25. The two compressors 25 are located inside the lower part of the box 10, ensuring that the refrigeration function meets the requirements of the high and low temperature test chamber. The four telescopic rods 12 fixed inside the lower part of the base 1 are arranged with "every two telescopic rods 12 corresponding to one stainless steel square tube 13". The two stainless steel square tubes 13 are fixed on both sides below the compressors 25. The stainless steel square tubes 13 evenly distribute the weight of the compressors 25 to the telescopic rods 12, avoiding overload of a single telescopic rod 12. When the compressors 25 vibrate vertically, the telescopic rods 12 extend and retract flexibly with the amplitude of the vibration. The No. 1 spring 14 sleeved on its outer wall undergoes elastic deformation simultaneously, directly absorbing the vibration energy transmitted from the compressors 25 to the bottom, preventing the vibration from being directly transmitted to the base 1 and the external mounting surface, forming the first line of vibration buffer.

[0026] The four fixed rods 15, which are fixed inside the base 1 of the base 1 that is fitted with the fixed rod 15, the first moving block 16, the second spring 17, and the first connecting rod, are respectively located below the four stainless steel square tubes 13. The first moving block 16 is slidably connected to both sides of its outer wall. The second spring 17 is connected to the end of the fixed rod 15 through the second spring 17, which is sleeved on the outer wall of the fixed rod 15. At the same time, the first connecting rod 2 is rotatably connected above the first moving block 16, and its other end is rotatably connected to the lower part of the stainless steel square tube 13. When the compressor 25 vibrates in the horizontal or inclined direction, the vibration is transmitted to the first connecting rod 2 through the stainless steel square tube 13. Due to the rotatable connection characteristics of the first connecting rod 2 at both ends, the vibration is converted into the first moving block 16 sliding horizontally along the fixed rod 15. If the compressor 25 shifts to one side, the first moving block 16 on the same side compresses the second spring 17, and the first moving block 16 on the other side stretches the second spring 17. The second spring 17 absorbs the sliding kinetic energy through bidirectional elastic action, cancels the horizontal vibration, and forms a second vibration buffer defense line.

[0027] The second movable block 18, the third spring 19, and the second connecting rod 21 are slidably connected on both sides of the middle of the outer wall of the fixing rod 15. The second movable block 18 is connected to the third spring 19, which is sleeved on the outer wall of the fixing rod 15. The second connecting rod 21 is rotatably connected above the second movable block 18. The other end of the second connecting rod 21 is concentrically rotatably connected to the end of the first connecting rod 2 away from the first movable block 16. When the compressor 25 vibrates and causes the first connecting rod 2 to tilt, the first connecting rod 2 pushes the second connecting rod 21 through the concentric rotation structure. Rod 21 causes the second movable block 18 to slide along the fixed rod 15: If the first connecting rod 2 tilts towards the middle of the fixed rod 15, the second connecting rod 21 pulls the two second movable blocks 18 closer together, compressing the third spring 19; if the first connecting rod 2 tilts towards the end of the fixed rod 15, the second connecting rod 21 pushes the two second movable blocks 18 away from each other, stretching the third spring 19. The third spring 19 further absorbs vibration energy through elastic deformation, making up for the deficiency of single-direction damping and minimizing the risk of vibration transmission and resonance.

[0028] Multiple shock absorptions reduce mechanical noise. The aforementioned triple shock absorption structure buffers the vibration of the compressor 25 during operation, preventing vibration from causing resonance in structural components such as the base 1 and housing 10, thus reducing mechanical noise generated by vibration at the source. At the same time, each spring, namely spring 14, spring 17, and spring 19, is sleeved on the outer wall of the corresponding telescopic rod 12 and fixed rod 15 to prevent spring deformation from shifting or twisting, thereby reducing additional noise caused by abnormal spring movement.

[0029] The soundproof enclosure 11 weakens the transmission of noise. The soundproof enclosure 11 installed on the outside of the enclosure 10 forms a physical sound barrier outside the equipment. It can directly block the mechanical noise of the compressor 25 inside the enclosure 10 from spreading outward, further reducing the noise interference to the surrounding environment. At the same time, it helps to block external dust and impurities from entering the enclosure 10, providing a stable operating environment for the compressor 25.

[0030] The compressor frequency control inverter 24 installed on one side of the inverter dynamic adaptation chamber 10 can dynamically adjust the operating frequency of the compressor 25 according to the cooling requirements of the high and low temperature environment test chamber, such as rapid cooling and constant temperature maintenance. When enhanced cooling is required, the frequency of the compressor 25 is increased to enhance the cooling capacity; when constant temperature is required, the frequency of the compressor 25 is reduced to reduce energy consumption. This adjustment method avoids the compressor 25 from running at full load for a long time, reduces vibration and noise under high load, and improves cooling efficiency and the service life of the compressor 25.

[0031] The control panel 23 and the door 22 work together to provide operators with an interface for parameter setting and status monitoring. The control panel 23 installed on one side of the enclosure 10 can easily control the start and stop of the compressor 25 and view operating data. If the equipment malfunctions, such as excessive vibration or compressor failure, it can also issue an early warning signal for timely troubleshooting. The door 22, which is rotatably connected to one side of the enclosure 10, can be opened at any time, allowing operators to directly access the compressor 25 and shock-absorbing components such as the telescopic rod 12 and springs inside the enclosure 10 for maintenance operations such as component inspection and wear replacement without disassembling the entire equipment, thus reducing the difficulty of operation and maintenance.

[0032] The contents not described in detail in this specification are existing technologies known to those skilled in the art. The standard parts used can be purchased from the market, and the irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the circuit connection adopts conventional connection methods in the existing technology, which will not be described in detail here.

[0033] This utility model is not limited to the above-described embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of this utility model shall be considered equivalent substitutions and shall be included within the protection scope of this utility model.

Claims

1. A low-noise compressor unit for a high and low temperature environment test chamber, comprising a base (1) and a compressor (25), characterized in that: A housing (10) is fixedly connected above the base (1). The compressor (25) is located below the inside of the housing (10). A telescopic rod (12) is fixedly connected below the inside of the base (1). A stainless steel square tube (13) is fixedly connected above each telescopic rod (12). Each stainless steel square tube (13) is fixedly connected to both sides below the compressor (25). A spring (14) is sleeved on the outer wall of the telescopic rod (12). A fixing rod (15) is fixedly connected below the inside of the base (1). The fixing rod (15) is located below the stainless steel square tube (13).

2. The low-noise compressor unit for the high and low temperature environment test chamber according to claim 1, characterized in that, Both sides of the outer wall of the fixed rod (15) are slidably connected to a first moving block (16), and a second spring (17) is fixedly connected to one side of the first moving block (16). The end of the second spring (17) away from the first moving block (16) is fixedly connected to the end of the fixed rod (15).

3. The low-noise compressor unit for the high and low temperature environment test chamber according to claim 2, characterized in that, A connecting rod (2) is rotatably connected above the first moving block (16), and the end of the first connecting rod (2) away from the first moving block (16) is rotatably connected to the bottom of the stainless steel square tube (13).

4. The low-noise compressor unit for the high and low temperature environment test chamber according to claim 3, characterized in that, The second moving block (18) is slidably connected to both sides of the middle part of the outer wall of the fixed rod (15). The third spring (19) is fixedly connected between the second moving blocks (18). The second connecting rod (21) is rotatably connected above the second moving block (18). The end of the second connecting rod (21) away from the second moving block (18) and the end of the first connecting rod (2) away from the first moving block (16) are concentrically rotatably connected.

5. The low-noise compressor unit for the high and low temperature environment test chamber according to claim 4, characterized in that, The second spring (17) and the third spring (19) are both sleeved on the outer wall of the fixed rod (15).

6. The low-noise compressor unit for the high and low temperature environment test chamber according to claim 1, characterized in that, The exterior of the enclosure (10) is fitted with a soundproof panel (11).

7. The low-noise compressor unit for the high and low temperature environment test chamber according to claim 1, characterized in that, A control panel (23) is installed on one side of the box (10), and a door (22) is rotatably connected to one side of the box (10).

8. The low-noise compressor unit for the high and low temperature environment test chamber according to claim 1, characterized in that, A compressor frequency control inverter (24) is installed on one side of the housing (10).

Images