Refrigeration device

Abstract

The application discloses a refrigeration device, comprising a box body, a liquid supply assembly, a refrigeration assembly, a first noise reduction module and a second noise reduction module; the box body is internally provided with an upper installation chamber and a lower installation chamber; the liquid supply assembly and the first noise reduction module are arranged in the lower installation chamber; the refrigeration assembly and the second noise reduction module are arranged in the upper installation chamber; a first microphone is used to acquire a first ambient noise in the lower installation chamber, and a first reverse sound wave corresponding to the first ambient noise is emitted by a first loudspeaker; a second microphone is used to acquire a second ambient noise in the upper installation chamber, and a second reverse sound wave corresponding to the second ambient noise is emitted by a second loudspeaker; thus, the two noise reduction modules can actively reduce the noise in the two installation chambers one by one, have a good noise reduction effect on high, medium and low frequency noises, and do not occupy too much internal space.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of refrigeration equipment, in particular to a refrigeration device. BACKGROUND

[0002] As the core equipment of industrial refrigeration and building air conditioning, the noise pollution of water chiller has become a key bottleneck limiting high-end application scenarios such as laboratories, medical environments and precision machining workshops. The noise is mainly generated by the coupling of multi-source vibration and fluid disturbance: low-frequency mechanical vibration: periodic operation of the compressor causes structural vibration, and low-frequency noise is transmitted through the base; the electromagnetic force fluctuation of the pump body motor further aggravates the low-frequency energy propagation. Medium and high frequency fluid noise: the interaction between fan blades and airflow produces turbulent noise, and the water flow in the pump body impacts the impeller and pump shell to form hydraulic noise, which superimposes to cause wideband noise pollution.

[0003] In related technologies, passive noise reduction means such as sound insulation cotton and damping layer have certain effect on medium and high frequency noise, but the noise reduction effect on low frequency sound wave is insufficient; at the same time, the additional sound insulation structure increases the volume of the equipment, reduces the space utilization rate, and is also not conducive to the heat dissipation of the equipment. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a refrigeration device which can actively reduce the medium, high and low frequency noise generated by the equipment and improve the noise reduction performance.

[0005] The present application provides a refrigeration device, comprising:

[0006] The box body has an upper installation chamber and a lower installation chamber inside; The liquid supply assembly comprises a pump body arranged in the lower installation chamber and used for circulating liquid inside the box body; The refrigeration assembly comprises a compressor arranged in the upper installation chamber, and the refrigeration assembly is used for refrigerating the liquid in the liquid supply assembly; The first noise reduction module comprises a first microphone and a first loudspeaker arranged in the lower installation chamber, the first microphone is located on one side of the pump body, and the first loudspeaker is used for generating a first reverse sound wave; The second noise reduction module comprises a second microphone and a second loudspeaker arranged in the upper installation chamber, the second microphone is located on one side of the compressor, and the second loudspeaker is used for generating a second reverse sound wave.

[0007] In some embodiments, the refrigeration device further comprises: The fan comprises a motor arranged in the upper installation chamber and a blade arranged on the rotating shaft of the motor, and the motor is located on the inner top wall of the box body; A third noise reduction module includes a third microphone and a third speaker arranged below the fan, wherein the third speaker is arranged towards the fan to generate a third reverse sound wave.

[0008] In some embodiments, the first noise reduction module includes a plurality of the first speakers, which are arranged symmetrically around the rotation shaft and towards the inner wall of the cabinet.

[0009] In some embodiments, the second noise reduction module includes a plurality of the second speakers, which are arranged symmetrically around the rotation shaft and towards the inner wall of the cabinet.

[0010] In some embodiments, the first noise reduction module includes a first reflection cone arranged in the lower mounting chamber, wherein the tip of the first reflection cone is arranged downward, and the first speaker is arranged towards the tip of the first reflection cone.

[0011] In some embodiments, the second noise reduction module includes a second reflection cone arranged in the upper mounting chamber, wherein the tip of the second reflection cone is arranged downward, and the second speaker is arranged towards the tip of the second reflection cone.

[0012] In some embodiments, the cabinet top is further provided with a rectification grille, the fan is arranged below the rectification grille, the blades are arranged opposite to the rectification grille, and the ventilation section of the rectification grille is a honeycomb structure; the edges of the blades are provided with a continuous sawtooth structure for suppressing turbulent flow. In some embodiments, the refrigeration device further includes: a water tank arranged in the lower mounting chamber and in communication with the pump body; a condenser arranged below the fan and in communication with the compressor; a heat exchanger arranged on one side of the compressor and in communication with the compressor and the pump body.

[0013] In some embodiments, the water tank is further provided with a heater inside, and the side wall of the cabinet is further provided with a liquid supply interface in communication with the pump body.

[0014] In some embodiments, the cabinet is further provided with a partition plate for separating the upper mounting chamber and the lower mounting chamber, the partition plate is provided with a through hole, and the side wall of the cabinet is further provided with a heat dissipation grille.

[0015] The refrigeration device in the embodiment of the application comprises a box body, a liquid supply assembly, a refrigeration assembly, a first noise reduction module and a second noise reduction module; the box body has an upper mounting chamber and a lower mounting chamber, the liquid supply assembly and the first noise reduction module are arranged in the lower mounting chamber, the refrigeration assembly and the second noise reduction module are arranged in the upper mounting chamber, the first microphone is used to acquire the first ambient noise in the lower mounting chamber, and the first loudspeaker is used to emit the first reverse sound wave corresponding to the first ambient noise; the second microphone is used to acquire the second ambient noise in the upper mounting chamber, and the second loudspeaker is used to emit the second reverse sound wave corresponding to the second ambient noise; thus, the two noise reduction modules can actively reduce the noise in the two mounting chambers one by one, have good noise reduction effect on high, medium and low frequency noises, and do not occupy too much internal space. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 FIG. 1 is a structural schematic diagram of a refrigeration device in an embodiment of the application; Fig. 2 FIG. 2 is a structural schematic diagram of a fan in an embodiment of the application; Fig. 3 FIG. 3 is a principle diagram of a refrigeration device in an embodiment of the application; Fig. 4 FIG. 4 is a principle diagram of a first noise reduction module in an embodiment of the application.

[0017] REFERENCE NUMERALS: 10, box body; 11, lower mounting chamber; 12, upper mounting chamber; 21, pump body; 22, water tank; 31, compressor; 32, heat exchanger; 33, blade; 34, rectifier grid; 35, condenser; 41, first microphone; 42, first loudspeaker; 43, second microphone; 44, second loudspeaker; 45, third microphone; 46, third loudspeaker; 47, first reflection cone.

[0018] The purposes, functional features and advantages of the application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0019] The scheme in the embodiments of the application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some of the embodiments in the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application.

[0020] It should be noted that all directionality indications in the embodiments of the application, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture, such as shown in the accompanying drawings, and the directionality indications will change accordingly if the specific posture changes.

[0021] It should also be noted that when an element is referred to as being "on" or "set on" another element, it can be directly on the other element or a middle element can be present at the same time. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or a middle element can be present at the same time.

[0022] In addition, the descriptions involving "first", "second" and the like in the embodiments of the present application are only for the purpose of description and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0023] The present application provides a refrigeration device. Referring to Figs. 1 to 4 , the refrigeration device comprises: a cabinet 10, which has an upper installation chamber 12 and a lower installation chamber 11 inside; a liquid supply assembly, which comprises a pump body 21 arranged in the lower installation chamber 11 and is used for circulating liquid inside the cabinet 10; a refrigeration assembly, which comprises a compressor 31 arranged in the upper installation chamber 12 and is used for refrigerating the liquid in the liquid supply assembly; a first noise reduction module, which comprises a first microphone 41 and a first speaker 42 arranged in the lower installation chamber 11, the first microphone 41 is located at one side of the pump body 21, and the first speaker 42 is used for generating a first reverse sound wave; and a second noise reduction module, which comprises a second microphone 43 and a second speaker 44 arranged in the upper installation chamber 12, the second microphone 43 is located at one side of the compressor 31, and the second speaker 44 is used for generating a second reverse sound wave.

[0024] The refrigeration device in this embodiment includes a housing 10, a liquid supply assembly, a refrigeration assembly, a first noise reduction module, and a second noise reduction module. The housing 10 adopts a dual-cavity layered structure design, with the upper installation chamber 12 and the lower installation chamber 11 acoustically isolated by a physical partition, effectively reducing noise propagation across regions. The upper installation chamber 12 mainly houses the high-noise source—the compressor 31; the lower installation chamber 11 centrally houses the pump 21 and the liquid piping system. The two noise reduction modules perform localized active noise control on the main noise sources within their respective chambers. The first microphone 41 collects the mechanical vibration and fluid pulsation noise caused by the operation of the pump 21 in real time. After analysis by the built-in signal processor, it generates an inverse signal to drive the first speaker 42 to output an inverse sound wave. Similarly, the second microphone 43 monitors the broadband noise caused by the start-up and shutdown of the compressor 31, piston movement, and refrigerant flow. The second speaker 44 synchronously emits an inverse sound pressure wave to achieve sound field interference cancellation. The zoned independent noise reduction strategy avoids the decrease in cancellation efficiency caused by the complexity of the sound field in traditional single-point noise reduction systems. This structure achieves full-band coverage suppression of high, medium and low frequency noise; the noise reduction module is arranged close to the noise source, requiring little reverse sound wave energy and low speaker power demand, saving energy and not significantly increasing the size of the equipment, which is conducive to the space optimization design of compact refrigeration units.

[0025] In some embodiments, the refrigeration device further includes: a fan, including a motor located in the upper mounting chamber 12 and blades 33 mounted on the motor shaft, the motor being located on the inner top wall of the housing 10; and a third noise reduction module, including a third microphone 45 and a third speaker 46 located below the fan, the third speaker 46 being positioned towards the fan to generate a third reverse sound wave. As a key component of forced convection heat transfer, the fan's high-speed rotating blades 33 interact with the air, generating significant aerodynamic noise, especially at the blade passing frequency and its harmonics, forming spike noise. The third microphone 45 is positioned below the fan's air inlet side to capture periodic pressure fluctuations caused by impeller disturbances; the third speaker 46 is angled towards the fan to emit a reverse sound wave with a 180° phase difference, which superimposes on the original noise along the sound wave propagation path, achieving feedforward active noise reduction. The third microphone 45 and the third speaker 46 form a closed-loop feedback system, which, combined with a digital signal processing unit, adjusts the reverse waveform in real time to adapt to noise changes under different wind speed conditions. This design significantly reduces the mid-to-high frequency noise dominated by the fan, improving the user's auditory experience. The effect is even more obvious in the nighttime silent mode. The third speaker 46 is directly facing the airflow inlet, and the reverse sound waves enter the impeller area with the airflow, enhancing the sound field interference effect and improving the noise reduction accuracy and response speed.

[0026] In some embodiments, the first noise reduction module includes a plurality of first speakers 42, which are arranged symmetrically around the pivot and facing the inner wall of the enclosure 10. The plurality of first speakers 42 are arranged in a ring array around the area where the pump body 21 is located, utilizing geometric symmetry to achieve uniform sound field radiation. The symmetrical arrangement ensures that the reverse sound waves cancel noise synchronously from multiple directions, avoiding uneven sound field or cancellation blind spots caused by single-point emission. The design of the speakers pointing towards the inner wall of the enclosure 10 allows the reverse sound waves to first reflect off the inner wall of the cavity, forming a diffused sound field, and then fully mix and interfere with the original noise, improving the noise reduction coverage. Compared to a single-speaker solution, the symmetrical layout of multiple speakers makes the overall sound pressure level distribution of the lower installation chamber 11 more uniform, further improving noise reduction consistency; the reflection from the inner wall extends the sound wave propagation path, enhancing the low-frequency noise interference effect and compensating for the slow low-frequency response of active noise cancellation; the layout requires no additional support, facilitating assembly and maintenance.

[0027] In some embodiments, the second noise reduction module includes multiple second speakers 44, which are centrally symmetrically arranged around the rotating shaft and facing the inner wall of the housing 10. The multiple second speakers 44 are symmetrically arranged around the compressor 31 to form a surround sound field control scheme. The compressor 31 is mostly a reciprocating or vortex structure, with strong noise directionality and concentrated energy; the ring speaker array can achieve 360° all-around noise cancellation. All second speakers 44 are coordinated by a unified controller, which performs phase synchronization adjustment based on the noise signal collected by the second microphone 43 to ensure that the reverse sound wave accurately matches the original noise propagation direction and time delay in space. This structure effectively solves the problem of localized high noise caused by the noise directionality of the compressor 31, significantly reducing noise in easily exposed areas such as the front and top of the equipment; the perceived noise of the entire machine is significantly reduced, improving the product's quietness performance.

[0028] In some embodiments, the first noise reduction module includes a first reflective cone 47 disposed in the lower mounting chamber 11, with the tip of the first reflective cone 47 facing downwards, and a first speaker 42 disposed facing the tip of the first reflective cone 47. The first reflective cone 47 is made of conical metal or high-density plastic, and its inner surface is polished to enhance sound wave reflection efficiency. The reverse sound wave emitted by the first speaker 42 strikes the cone tip and then spreads radially along the cone surface, simulating point source behavior and forming an approximately spherically symmetrical reverse sound field around the pump body 21. This design utilizes the principle of geometric focusing to convert directionally emitted sound waves into a wide-angle radiation mode, expanding the effective noise reduction area. The reflective cone structure significantly improves the spatial coverage of reverse sound waves and is suitable for sound field obstruction areas caused by complex pipework around the pump body 21. Actual measurements show that after adding the reflective cone, the noise attenuation capability in the dead corner area of ​​the lower mounting chamber 11 is improved, and the overall noise reduction uniformity is greatly improved; the sound energy utilization rate is improved, which can reduce the speaker output power and extend the service life.

[0029] In some embodiments, the second noise reduction module includes a second reflective cone (not shown) disposed in the upper mounting chamber 12, with the tip of the second reflective cone facing downwards, and a second speaker 44 positioned towards the tip of the second reflective cone. The second reflective cone is positioned above or to the side of the compressor 31 and works in conjunction with the second speaker 44. Its mechanism of action is the same as that of the first reflective cone 47: the conical structure scatters the concentrated emitted reverse sound waves into secondary sound sources that propagate in multiple directions, enhancing the ability to cancel noise from the top and sides of the compressor 31. Preferably, the second reflective cone is made of a composite material with a microporous sound-absorbing structure, which absorbs some residual noise while reflecting the reverse sound waves, achieving active + passive composite noise reduction. This structure improves the spatial adaptability of active noise reduction and further weakens high-frequency residual noise through material sound absorption, resulting in a better overall noise reduction effect than a purely active system; the compressor 31 exhibits excellent control of impact noise at startup, effectively alleviating the "humming" sensation and improving the user experience.

[0030] In some embodiments, a rectifier grille 34 is also provided on the top of the housing 10, with the fan located below the rectifier grille 34 and the blades 33 facing the rectifier grille 34. The ventilation section of the rectifier grille 34 has a honeycomb structure. The edges of the blades 33 are provided with continuously distributed serrated structures to suppress turbulence. The rectifier grille 34 adopts a honeycomb hexagonal through-hole array, which has a good airflow guiding function, rectifying the turbulent airflow at the fan outlet into a parallel flow, reducing vortex shedding and secondary noise generation. The serrated structure at the edge of the blades 33 mimics the biological noise reduction mechanism of owl feathers, breaking up large-scale vortex structures by segmenting the shear layer, delaying boundary layer separation, and reducing trailing edge noise. The ratio of serration depth to wavelength is optimized to balance aerodynamic efficiency and noise reduction effect. The honeycomb grille and serrated blades work together to reduce aerodynamic noise generation at the source; the rectifier grille 34 also plays a role in safety protection and dust prevention, extending the equipment life.

[0031] In some embodiments, the refrigeration device further includes: a water tank 22, located in the lower installation chamber 11 and connected to the pump body 21; a condenser 35, located below the fan and connected to the compressor 31; and a heat exchanger 32, located on one side of the compressor 31 and connected to both the compressor 31 and the pump body 21. The water tank 22 serves as a liquid storage and buffer unit for the liquid circulation system, and its volume design meets the requirements for long-term operation. The condenser 35 is located directly below the fan, utilizing the forced airflow of the fan to achieve efficient heat dissipation. The heat exchanger 32 adopts a plate or shell-and-tube structure, with internal guide channels to enhance turbulent heat transfer efficiency. The entire system constitutes a closed-loop refrigeration cycle: the compressor 31 discharges high-temperature, high-pressure refrigerant → the condenser 35 dissipates heat and liquefies the refrigerant → the throttling device reduces the pressure → the heat exchanger 32 absorbs heat and evaporates → the refrigerant returns to the compressor 31; simultaneously, the pump body 21 drives the liquid to flow through the heat exchanger 32 to be cooled, and then transported to the external load. In this embodiment, the functional modules of the refrigeration device are rationally arranged to form an efficient integrated heat-sound-flow system; the vertical stacking design of the condenser 35 and the fan makes full use of the natural convection effect of the rising hot airflow to improve heat dissipation efficiency; the heat exchanger 32 is arranged close to the compressor 31 to shorten the length of the high-temperature pipeline and reduce heat loss; the overall system energy efficiency ratio is improved, while providing a stable operating environment for the noise reduction module.

[0032] In some embodiments, the water tank 22 is further equipped with a heater, and the side wall of the tank body 10 is also equipped with a liquid supply interface, which is connected to the pump body 21. The heater is an immersion electric heating tube or a PTC ceramic heating element, embedded in the bottom or side wall of the water tank 22, to realize liquid preheating or temperature compensation functions, suitable for application scenarios requiring variable temperature control. The liquid supply interface adopts a quick-connect connector design, which is convenient for connecting to external circulation pipelines to realize internal and external liquid exchange or replenishment. The partition is used to separate the upper installation chamber 12 and the lower installation chamber 11. The partition is equipped with through holes, and the side wall of the tank body 10 is also equipped with a heat dissipation grille. The partition adopts a double-layer sandwich structure, with sound insulation cotton or damping material filled in the middle, which ensures both structural strength and enhances acoustic isolation effect; rubber sealing rings are installed around the through holes to prevent noise leakage along the holes; the heat dissipation grille is set on the rear or side of the tank body 10, and adopts a louvered or corrugated hole design, which allows hot air to be discharged naturally while blocking the entry of external foreign objects. The partition reduces sound transmission loss between the upper and lower chambers, effectively preventing noise crosstalk; the heat dissipation grille, in conjunction with the fan, forms an effective airflow channel, ensuring stable operation of heat-generating components such as compressor 31 and extending the overall lifespan of the unit. This design expands the functional boundaries of the refrigeration unit, enabling it to combine cooling and heating capabilities, suitable for wide-range temperature control requirements; the standardized liquid supply interface design facilitates integration into larger systems, improving the equipment's versatility and expandability.

[0033] In summary, the refrigeration device provided in this application embodiment achieves a balance between high-efficiency refrigeration and low-noise operation through layered layout, zoned noise reduction, structural optimization, and multi-physics collaborative design. Its working principle is as follows: the pump body 21 and water tank 22 in the liquid supply assembly drive the liquid to circulate within the system, achieving external load temperature control; the compressor 31 in the refrigeration assembly drives the refrigerant circulation, transferring heat to the outside air through the condenser 35 (with enhanced heat dissipation via a fan), and absorbing heat from the liquid in the liquid supply assembly through the heat exchanger 32, thus maintaining the liquid in the water tank 22 at a set temperature; each noise reduction module implements precise active noise reduction for the three major noise sources—pump body 21, compressor 31, and fan—through a closed-loop mechanism of "microphone acquisition—signal processing—speaker emission of reverse sound waves"; the reflector cone, multi-speaker array, honeycomb grid 34, and serrated blades 33 further optimize the sound field distribution and aerodynamic performance; the partition and heat dissipation structure ensure system thermal management and acoustic isolation.

[0034] This refrigeration unit achieves full-frequency noise suppression, high energy efficiency, and multi-functional integration while maintaining a compact structure. Compared with traditional equipment, the overall noise is reduced, and the user experience is significantly improved. It is particularly suitable for laboratories, medical settings, precision instruments, and other occasions where quiet operation is required.

[0035] The above are only some or preferred embodiments of this application. Neither the text nor the drawings can limit the scope of protection of this application. All equivalent structural transformations made using the content of this application's specification and drawings under the same overall concept as this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. A refrigeration device, characterized in that, include: The enclosure has an upper installation chamber and a lower installation chamber inside; The liquid supply assembly includes a pump body located in the lower installation chamber, and the liquid supply assembly is used to circulate liquid supply inside the tank. A refrigeration assembly, including a compressor disposed in the upper mounting chamber, is used to cool the liquid in the liquid supply assembly; The first noise reduction module includes a first microphone and a first speaker located in the lower installation chamber. The first microphone is located on one side of the pump body, and the first speaker is used to generate a first reverse sound wave. The second noise reduction module includes a second microphone and a second speaker located in the upper installation chamber. The second microphone is located on one side of the compressor, and the second speaker is used to generate a second reverse sound wave.

2. The refrigeration device according to claim 1, characterized in that, The refrigeration device further includes: The fan includes a motor located in the upper mounting chamber and blades located on the shaft of the motor, the motor being located on the inner top wall of the housing; The third noise reduction module includes a third microphone and a third speaker located on the underside of the fan. The third speaker is positioned facing the fan and is used to generate a third reverse sound wave.

3. The refrigeration device according to claim 2, characterized in that, The first noise reduction module includes a plurality of first speakers, which are arranged symmetrically about the pivot and facing the inner wall of the enclosure.

4. The refrigeration device according to claim 3, characterized in that, The second noise reduction module includes a plurality of second speakers, which are arranged symmetrically about the pivot and facing the inner wall of the enclosure.

5. The refrigeration device according to claim 4, characterized in that, The first noise reduction module includes a first reflector cone disposed in the lower installation chamber, with the tip of the first reflector cone facing downwards, and the first speaker disposed towards the tip of the first reflector cone.

6. The refrigeration device according to claim 5, characterized in that, The second noise reduction module includes a second reflector cone disposed in the upper installation chamber, with the tip of the second reflector cone facing downwards, and the second speaker disposed towards the tip of the second reflector cone.

7. The refrigeration device according to claim 2, characterized in that, The top of the housing is also provided with a flow-rectifying grille, the fan is located below the flow-rectifying grille, the blades are positioned directly opposite the flow-rectifying grille, and the ventilation section of the flow-rectifying grille has a honeycomb structure; the edges of the blades are provided with a continuously distributed serrated structure, which is used to suppress turbulence.

8. The refrigeration device according to claim 7, characterized in that, The refrigeration device further includes: A water tank is located in the lower installation chamber and is connected to the pump body; A condenser is located below the fan and is connected to the compressor; A heat exchanger is located on one side of the compressor and is connected to both the compressor and the pump body.

9. The refrigeration device according to claim 8, characterized in that, The water tank is also equipped with a heater, and the side wall of the tank is also equipped with a liquid supply interface, which is connected to the pump body.

10. The refrigeration device according to claim 8, characterized in that, The box body is also provided with a partition, which is used to separate the upper installation chamber and the lower installation chamber. The partition is provided with through holes, and the side wall of the box body is also provided with heat dissipation grilles.

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