Seawater fish low-temperature fresh-keeping device

Abstract

The invention discloses a marine fish low-temperature fresh-keeping device, and relates to the related field of fresh-keeping technology, the marine fish low-temperature fresh-keeping device comprises a fresh-keeping box, a refrigerator, an air inlet connecting assembly, an oxygen generator, a humidifier, a support frame, a corrugated pipe, a pipeline joint, an ultraviolet germicidal lamp and a sensor assembly; by arranging the air inlet connecting assembly and the supporting frame, the oxygen generator and the humidifier are supported through the supporting frame, and the oxygen generator and the humidifier are connected with the fresh-keeping box through the air inlet connecting assembly, so that the oxygen generator and the humidifier are convenient to disassemble and assemble, and meanwhile, the maintenance is convenient; the fresh-keeping device can be combined into fresh-keeping devices with different functions according to the seawater fishes with different fresh-keeping environment requirements, the application range of the device for fresh keeping of different seawater fishes is widened, the device cost is reduced, and the fresh-keeping effect of the seawater fishes is improved.

Description

Technical Field

[0001] The invention relates to the relevant field of preservation technology, in particular to a low-temperature preservation device for marine fish. Background Art

[0002] my country is rich in aquatic product resources, which are mainly transported and stored through freezing. At present, there are various methods for preserving marine fish, but low-temperature preservation is widely used because it can effectively extend the shelf life of marine fish. Low temperature can inhibit the growth of microorganisms and slow down the oxidation rate of fish meat, thereby maintaining the freshness of fish meat. At present, the low-temperature preservation method is to use refrigeration equipment or freezing equipment. For example, the Chinese utility model with the publication number CN220936582U discloses a yellow croaker freezing preservation device, which relates to the field of freezing preservation technology. The inside of the freezer is sprayed by multiple spray heads to ensure that the yellow croaker can lock water and preserve freshness more quickly. The two first placement plates are adjusted by the threaded rod, so that when the yellow croaker is frozen and preserved, the layered plates in the freezer can be adjusted according to the number of yellow croakers of different sizes, so as to avoid surplus or shortage of storage space of yellow croakers of different sizes in the freezer, so that the yellow croaker can achieve the best storage effect in the freezer; Although the above-mentioned freezing preservation device and the low-temperature preservation equipment of the prior art can effectively extend the preservation period, they still have the following disadvantages: Since the preservation environment of fish meat is also affected by oxygen concentration and humidity, the preservation equipment generally only has a refrigeration effect. In the prior art, the preservation equipment adjusts the oxygen concentration and humidity in the preservation equipment by setting an oxygen generator and a humidifier. It is not convenient to select the function of the preservation equipment according to the preservation environment requirements of different marine fish. Different marine fish have different requirements for the preservation environment. When preserving marine fish that have no oxygen concentration or humidity requirements in the preservation environment, the use of preservation equipment with oxygen concentration adjustment and humidity control functions increases the equipment cost. The use of preservation equipment with only a refrigeration effect is not conducive to the preservation of marine fish affected by oxygen concentration or humidity. Summary of the invention

[0003] Therefore, in order to solve the above-mentioned shortcomings, the present invention provides a low-temperature preservation device for marine fish.

[0004] The present invention is implemented in this way: a low-temperature fresh-keeping device for marine fish is constructed, which includes a fresh-keeping box, a refrigerator, an air intake connection assembly, an oxygen generator, a humidifier and a support frame. The refrigerator is installed on the right side of the fresh-keeping box, and two air intake connection assemblies and two support frames are installed on the left side of the refrigerator. The oxygen generator and the humidifier are respectively installed inside the two support frames. The tops of the oxygen generator and the humidifier are respectively connected to the air intake connection assembly, and a sensor assembly is installed on the inner side of the fresh-keeping box.

[0005] Preferably, a box cover is installed on the top of the fresh-keeping box, a controller and a battery assembly are installed on the bottom of the fresh-keeping box, self-locking universal wheels are installed on the bottom of the controller and the battery assembly, bellows are connected to the top of the oxygen concentrator and the humidifier, and the bellows are connected to the air intake connection assembly through a pipe joint, an ultraviolet sterilization lamp is installed on the bottom of the box cover, connection ports are opened on the left and right sides of the controller and the battery assembly, and the refrigerator, oxygen concentrator and humidifier are electrically connected to the controller and the battery assembly through the connection ports on the left and right sides of the controller and the battery assembly, respectively.

[0006] Preferably, the refrigerator includes an outer shell, a fixed plate, a partition, an evaporator, a fan 1, a throttle valve, a condenser, a fan 2, a compressor, an exhaust assembly, a water collecting chamber, a V-shaped water collecting frame, an overflow pipe and a drain valve. A fixed plate is provided at the edge of the outer shell, a partition is fixed to the inner middle part of the outer shell, an evaporator is provided at the inner top of the outer shell, a fan 1 is provided on the left side of the evaporator, the throttle valve and the condenser are provided at the inner bottom of the outer shell, and a fan 2 is provided on the right side of the condenser. The evaporator, throttle valve, condenser and compressor form a closed ring pipeline, an exhaust assembly is provided at the rear top of the outer shell, a water collecting chamber is provided at the rear bottom of the outer shell, a V-shaped water collecting frame is provided at the top of the water collecting chamber, and the bottom end of the V-shaped water collecting frame is connected to the overflow pipe, a drain pipe is installed at the rear bottom of the water collecting chamber, and the fixed plate is fixedly connected to the right side of the fresh-keeping box by bolts.

[0007] Preferably, two through holes are provided on the right side of the fresh-keeping box, and the positions of the two through holes are respectively aligned with the positions of the fan 1 and the exhaust assembly.

[0008] Preferably, the sensor assembly includes an oxygen sensor and a temperature and humidity sensor, and both the oxygen sensor and the temperature and humidity sensor are arranged inside the fresh-keeping box.

[0009] Preferably, a transparent window is opened on the right side of the water collecting chamber, and a liquid level scale is provided on the window.

[0010] Preferably, a through hole is opened at the top of the left side of the shell, and the position of the through hole corresponds to the position of the fan, and the top surface of the partition is inclined downward from front to back.

[0011] Preferably, the inner walls of the support frame are respectively fitted with the outer shells of the oxygen concentrator and the humidifier.

[0012] Preferably, the exhaust assembly includes a box shell, a solenoid valve, a third fan and a filter. The solenoid valve is installed on the inner left wall of the box shell, and the third fan is installed inside the box shell. An exhaust port is opened on the right side of the box shell, and the exhaust port is covered by a filter. The box shell is fixedly connected to the outer shell.

[0013] Preferably, the air intake connection assembly includes a fixed shell, a one-way valve, a connecting pipe and a threaded joint, a one-way valve is fixed to the inner bottom end of the fixed shell, the top of the one-way valve is connected to the connecting pipe, and the connecting pipe is connected to the fresh-keeping box, a threaded joint is provided at the bottom of the one-way valve, and the pipe joint at the top of the bellows is threadedly connected to the threaded joint, and the flow direction of the one-way valve is from bottom to top.

[0014] The present invention has the following advantages: The present invention provides a low-temperature fresh-keeping device for marine fish by improvement, which has the following improvements compared with the same type of equipment: The low-temperature fresh-keeping device for marine fish described in the present invention adopts a modular design for a refrigerator, an oxygen generator and a humidifier, and provides an air intake connection component and a support frame. The oxygen generator and the humidifier are supported by the support frame, and the oxygen generator and the humidifier are connected to a fresh-keeping box through the air intake connection component, which is convenient for disassembly and assembly of the oxygen generator and the humidifier, and convenient for maintenance. The fresh-keeping device can be combined into fresh-keeping devices with different functions according to marine fish with different fresh-keeping environment requirements, thereby increasing the application scope of the equipment for preserving different marine fish, reducing equipment costs, and improving the fresh-keeping effect of marine fish. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a structural schematic diagram of the left side of the fresh-keeping box of the present invention; Figure 3 The present invention Figure 2 A partial enlarged view of area A; Figure 4 It is a schematic diagram of the internal structure of the fresh-keeping box of the present invention; Figure 5 It is a schematic diagram of the structure of the refrigerator of the present invention; Figure 6 It is a right view of the internal structure of the refrigerator of the present invention; Figure 7 It is a schematic diagram of the internal structure of the refrigerator of the present invention; Figure 8 It is a schematic diagram of the internal structure of the exhaust assembly of the present invention; Fig. 9 It is a schematic diagram of the internal structure of the air intake connection assembly of the present invention.

[0016] Among them: fresh-keeping box-1, box cover-2, controller and battery assembly-3, self-locking universal wheel-4, refrigerator-5, air intake connection assembly-6, oxygen generator-7, humidifier-8, support frame-9, bellows-10, pipe joint-11, ultraviolet germicidal lamp-12, sensor assembly-13, shell-51, fixing plate-52, partition-53, evaporator-54, fan one-55, throttle valve-56, condenser-57, fan two-58, compressor-59, exhaust assembly-510, water collection chamber-511, V-shaped water collection frame-512, overflow pipe-513, drain valve-514, box shell-5101, solenoid valve-5102, fan three-5103, filter-5104, fixing shell-61, one-way valve-62, connecting pipe-63, threaded joint-64. DETAILED DESCRIPTION

[0017] The following will be combined with the attached Figure 1-9 The present invention is described in detail, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0018] See also Figure 1-4 A low-temperature fresh-keeping device for marine fish of the present invention comprises a fresh-keeping box 1, a refrigerator 5, an air intake connection assembly 6, an oxygen generator 7, a humidifier 8 and a support frame 9. The refrigerator 5 is installed on the right side of the fresh-keeping box 1, and two air intake connection assemblies 6 and two support frames 9 are installed on the left side of the fresh-keeping box 1. The oxygen generator 7 and the humidifier 8 are respectively installed inside the two support frames 9. The tops of the oxygen generator 7 and the humidifier 8 are respectively connected to the air intake connection assembly 6, and a sensor assembly 13 is installed on the inner side of the fresh-keeping box 1.

[0019] A box cover 2 is installed on the top of the fresh-keeping box 1, and a controller and a battery assembly 3 are installed at the bottom of the fresh-keeping box 1. The controller adopts a thermostat model, which has functions such as refrigeration, defrosting, and temperature over-limit alarm. It is suitable for refrigeration industries such as cold storage and refrigerated trucks. The compressor protection delay curing is 3 minutes. After the sensor fails, it starts and stops according to the curing ratio. The battery assembly is used to power the preservation device. A self-locking universal wheel 4 is installed at the bottom of the controller and the battery assembly 3. The tops of the oxygen generator 7 and the humidifier 8 are connected to the bellows 10, and the bellows 10 is connected to the air intake connection assembly 6 through a pipe joint 11. An ultraviolet germicidal lamp 12 is installed at the bottom of the box cover 2. The ultraviolet germicidal lamp 12 adopts a model LYD-C6030 embedded ultraviolet disinfection lamp. Connection ports are opened on the left and right sides of the controller and the battery assembly 3, and the refrigerator 5, the oxygen generator 7 and the humidifier 8 are connected to the controller and the battery assembly 3 through the connection ports on the left and right sides of the controller and the battery assembly 3 respectively. The cell assembly 3 is electrically connected, the sensor assembly 13 includes an oxygen sensor and a temperature and humidity sensor, and the oxygen sensor and the temperature and humidity sensor are both arranged inside the fresh-keeping box 1. The temperature and humidity sensor adopts a model, which performs well in terms of accuracy and stability. Its temperature accuracy can reach ±0.2°C (typical value), and its humidity accuracy can reach ±1.8%RH (typical value). The oxygen sensor adopts a model O2 / I-06 sensor with a measurement range of 0-100% and an operating temperature range of -30°C to 40°C, which is suitable for use in low temperature environments. The oxygen concentration inside the fresh-keeping box 1 is monitored by the oxygen sensor, and the temperature and humidity inside the fresh-keeping box 1 are monitored by the temperature and humidity sensor. The inner walls of the two support frames 9 are respectively fitted with the outer walls and bottom of the oxygen generator 7 and the humidifier 8, thereby increasing the stability of the oxygen generator 7 and the humidifier 8, so that the oxygen generator 7 and the humidifier 8 can be stabilized by being placed in the support frame 9, without the need for bolts and other fasteners to connect and fix them.

[0020] The refrigerator 5 is used to cool and dehumidify the interior of the fresh-keeping box 1. The oxygen generator 7 is used to input oxygen into the fresh-keeping box 1. The required concentration of oxygen is input into the fresh-keeping box 1 to achieve the effect of adjusting the oxygen concentration inside the fresh-keeping box 1. The oxygen generator 7 adopts an oxygen generator with pure oxygen output, stable concentration and compact design, such as the Haier Z505W oxygen generator on the market. The humidifier 8 is used to input moisture into the fresh-keeping box 1 to increase the moisture inside the fresh-keeping box 1. The humidifier 8 adopts a compact ultrasonic humidifier, such as the Yadu YC-X100 humidifier, Anrunshi industrial humidifier, etc. on the market.

[0021] See also Figure 5-8The refrigerator 5 includes a shell 51, a fixing plate 52, a partition 53, an evaporator 54, a fan 1 55, a throttle valve 56, a condenser 57, a fan 2 58, a compressor 59, an exhaust assembly 510, a water collecting chamber 511, a V-shaped water collecting frame 512, an overflow pipe 513 and a drain valve 514. The fixing plate 52 is arranged at the edge of the shell 51, the partition 53 is fixed to the inner middle part of the shell 51, the evaporator 54 is arranged at the inner top of the shell 51, the fan 1 55 is arranged on the left side of the evaporator 54, and the throttle valve 56 and the condenser 57 are arranged on the shell At the inner bottom of 51, a fan 2 58 is arranged on the right side of the condenser 57, and the evaporator 54, the throttle valve 56, the condenser 57 and the compressor 59 form a closed ring pipeline. An exhaust assembly 510 is arranged on the top of the rear side of the outer shell 51, and a water collecting chamber 511 is arranged on the bottom of the rear side of the outer shell 51. A V-shaped water collecting frame 512 is arranged on the top of the water collecting chamber 511, and an overflow pipe 513 is connected to the bottom end of the V-shaped water collecting frame 512. A drain pipe 514 is installed on the bottom of the rear side of the water collecting chamber 511, and the fixing plate 52 is fixedly connected to the right side of the fresh-keeping box 1 by bolts.

[0022] The evaporator 54 adopts a fin coil evaporator, which is suitable for indirect cooling refrigerators. The condenser 57 adopts a LNQ-110 condenser, which is suitable for refrigerators of various specifications. It adopts an efficient heat dissipation design and can provide a stable refrigeration effect.

[0023] The refrigerant in the evaporator 54 is vaporized from a low-pressure liquid to a gas, absorbing the heat in the fresh-keeping box 1, lowering the temperature in the fresh-keeping box 1. Then, the refrigerant is sucked into the compressor 59 and compressed into a high-temperature and high-pressure gas, which is discharged into the condenser 57 to release heat and gradually condense into a liquid. These high-pressure liquids are throttled and depressurized by the throttle valve 56 and then slowly flow into the evaporator 54, continuing to vaporize and absorb heat, thus forming a cycle. Two through holes are provided on the right side of the fresh-keeping box 1, and the positions of the two through holes are aligned with the positions of the fan 55 and the exhaust assembly 510 respectively. A through hole is provided on the top left side of the shell 51, and the position of the through hole corresponds to the position of the fan 55. The top surface of the partition 53 is tilted downward from front to back, so that the fresh-keeping box 1 is connected with the chamber where the evaporator 54 is located, which is beneficial to refrigeration and dehumidification of the interior of the fresh-keeping box 1. During dehumidification, moisture adheres to the evaporator 54 to form water droplets, and the water droplets drip onto the partition 53, and the water droplets are guided to the water collecting chamber 511 through the tilt of the partition 53.

[0024] A transparent window is provided on the right side of the water collecting chamber 511 , and a liquid level scale is provided on the window, which is convenient for checking the height of the liquid level inside the water collecting chamber 511 , so as to drain the water inside the water collecting chamber 511 in time.

[0025] The exhaust component 510 includes a box shell 5101, a solenoid valve 5102, a fan three 5103 and a filter 5104. The solenoid valve 5102 is installed on the inner left wall of the box shell 5101. The solenoid valve 5102 is used to control the connection and separation between the box shell 5101 and the fresh-keeping box 1, and the solenoid valve 5102 adopts an electromagnetic butterfly valve, which has a large connection space when opened. The fan three 5103 is installed inside the box shell 5101. The fan three 5103 is vertically arranged in the inner middle part of the box shell 5101, and the solenoid valve 5102 and the fan three 5103 are electrically connected to the controller and the battery assembly 3. An exhaust port is opened on the right side of the box shell 5101, and the exhaust port is covered by the filter 5104. The front side and bottom of the outer wall of the box shell 5101 are fixedly connected to the top rear end of the outer shell 51.

[0026] See also Fig. 9 The air intake connection assembly 6 includes a fixed shell 61, a one-way valve 62, a connecting pipe 63 and a threaded joint 64. The one-way valve 62 is fixed to the inner bottom end of the fixed shell 61. The top of the one-way valve 62 is connected to the connecting pipe 63, and the connecting pipe 63 is connected to the inner cavity of the fresh-keeping box 1. A threaded joint 64 is provided at the bottom of the one-way valve 62, and the pipe joint 11 at the top of the bellows 10 is threadedly connected to the threaded joint 64.

[0027] The flow direction of the one-way valve 62 is from bottom to top, so as to prevent the cold air inside the fresh-keeping box 1 from leaking through the one-way valve 62 , and the oxygen generator 7 and the humidifier 8 can inject oxygen and moisture into the fresh-keeping box 1 .

[0028] The present invention provides a low-temperature fresh-keeping device for marine fish through improvement, and its working principle is as follows; First, the oxygen concentrator 7 and the humidifier 8 are installed as needed, and the oxygen concentrator 7 and the humidifier 8 are placed in the support frame 9, and the oxygen concentrator 7 and the humidifier 8 are respectively connected to the bellows 10, and the top of the bellows 10 is connected to the threaded joint 64 of the air inlet connection assembly 6 through the pipe joint 11, and the installation of the oxygen concentrator 7 and the humidifier 8 can be completed. The preservation device can be combined into preservation devices with different functions as needed; Second, the ultraviolet sterilization lamp 12 is used to sterilize the fresh-keeping box 1, the oxygen concentration inside the fresh-keeping box 1 is monitored by the oxygen sensor of the sensor assembly 13, the temperature and humidity inside the fresh-keeping box 1 are monitored by the temperature and humidity sensor of the sensor assembly 13, and the inside of the fresh-keeping box 1 is cooled by the refrigerator 5, and during cooling, the cold air on the evaporator 54 is blown into the inside of the fresh-keeping box 1 through the fan 55; Third, when dehumidifying the interior of the fresh-keeping box 1, the fan 55 is controlled to rotate in the reverse direction, so that the air in the fresh-keeping box 1 is blown onto the evaporator 54, and the moisture in the air in the fresh-keeping box 1 adheres to the evaporator 54 to form water droplets, and the water droplets drip onto the partition 53, and the partition 53 is tilted to guide the water droplets to the V-shaped water collection frame 512 on the water collection chamber 511, and then enter the water collection chamber 511 through the overflow pipe 513, and the water in the water collection chamber 511 can be discharged by opening the drain valve 514; Fourth, the oxygen generator 7 and the humidifier 8 input oxygen and moisture into the fresh-keeping box 1 according to the oxygen concentration and humidity inside the fresh-keeping box 1. When it is necessary to input oxygen and moisture into the fresh-keeping box 1, the oxygen generator 7 and the humidifier 8 inject oxygen and moisture into the fresh-keeping box 1 through the bellows 10 via the one-way valve 62 and the connecting pipe 63 of the air inlet connecting assembly 6, and adjust the oxygen concentration and humidity in the fresh-keeping box 1 to meet the preservation requirements of different types of marine fish, so as to maintain the best preservation environment for marine fish and increase the taste and texture of fish meat; Fifth, when the oxygen concentration inside the fresh-keeping box 1 is too high or the temperature is too low, the solenoid valve 5102 is controlled to open, and the fan 3 5103 is started to exhaust the inside of the fresh-keeping box 1, so as to discharge the excessively concentrated oxygen or the cold air of too low a temperature inside the fresh-keeping box 1.

[0029] The above shows and describes the basic principle, main features and advantages of the present invention, and the standard parts used in the present invention can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0030] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A low-temperature fresh-keeping device for marine fish, comprising a fresh-keeping box (1); Features: The fresh-keeping box (1) further comprises a refrigerator (5), an air intake connection assembly (6), an oxygen generator (7), a humidifier (8) and a support frame (9); the refrigerator (5) is installed on the right side of the fresh-keeping box (1); two air intake connection assemblies (6) and two support frames (9) are installed on the left side of the refrigerator (5); the oxygen generator (7) and the humidifier (8) are installed inside the two support frames (9), respectively; the tops of the oxygen generator (7) and the humidifier (8) are connected to the air intake connection assembly (6), respectively; and the sensor assembly (13) is installed inside the fresh-keeping box (1).

2. A low-temperature fresh-keeping device for marine fish according to claim 1, characterized in that: The top of the fresh-keeping box (1) is provided with a box cover (2), the bottom of the fresh-keeping box (1) is provided with a controller and a battery assembly (3), the bottom of the controller and the battery assembly (3) is provided with a self-locking universal wheel (4), the tops of the oxygen concentrator (7) and the humidifier (8) are both connected with a bellows (10), and the bellows (10) is connected to the air intake connection assembly (6) through a pipe joint (11), the bottom of the box cover (2) is provided with an ultraviolet sterilization lamp (12), the left and right sides of the controller and the battery assembly (3) are provided with connection ports, and the refrigerator (5), the oxygen concentrator (7) and the humidifier (8) are respectively electrically connected to the controller and the battery assembly (3) through the connection ports on the left and right sides of the controller and the battery assembly (3).

3. The low-temperature fresh-keeping device for marine fish according to claim 1, characterized in that: The refrigerator (5) comprises a shell (51), a fixing plate (52), a partition (53), an evaporator (54), a fan 1 (55), a throttle valve (56), a condenser (57), a fan 2 (58), a compressor (59), an exhaust assembly (510), a water collecting chamber (511), a V-shaped water collecting frame (512), an overflow pipe (513) and a drain valve (514). A fixing plate (52) is arranged at the edge of the shell (51), a partition (53) is fixed at the inner middle part of the shell (51), an evaporator (54) is arranged at the inner top of the shell (51), a fan 1 (55) is arranged on the left side of the evaporator (54), and the throttle valve (56) and the condenser (57) are arranged at the inner top of the shell (51). The condenser (57) is provided at the inner bottom of the housing (51). A second fan (58) is provided on the right side of the condenser (57). The evaporator (54), the throttle valve (56), the condenser (57) and the compressor (59) form a closed annular pipeline. An exhaust assembly (510) is provided on the top of the rear side of the housing (51). A water collecting chamber (511) is provided on the bottom of the rear side of the housing (51). A V-shaped water collecting frame (512) is provided on the top of the water collecting chamber (511). An overflow pipe (513) is connected to the bottom end of the V-shaped water collecting frame (512). A drain pipe (514) is installed on the bottom of the rear side of the water collecting chamber (511). The fixing plate (52) is fixedly connected to the right side of the fresh-keeping box (1) by bolts.

4. A low-temperature fresh-keeping device for marine fish according to claim 3, characterized in that: The right side surface of the fresh-keeping box (1) is provided with two through holes, and the positions of the two through holes are respectively aligned with the positions of the fan 1 (55) and the exhaust assembly (510).

5. The low-temperature fresh-keeping device for marine fish according to claim 1, characterized in that: The sensor assembly (13) comprises an oxygen sensor and a temperature and humidity sensor, and both the oxygen sensor and the temperature and humidity sensor are arranged inside the fresh-keeping box (1).

6. The low-temperature fresh-keeping device for marine fish according to claim 3, characterized in that: A transparent window is provided on the right side of the water collecting chamber (511), and a liquid level scale is provided on the window.

7. The low-temperature fresh-keeping device for marine fish according to claim 3, characterized in that: A through hole is provided at the top left side of the housing (51), and the position of the through hole corresponds to the position of the fan 1 (55), and the top end surface of the partition plate (53) is inclined downward from front to back.

8. The low-temperature fresh-keeping device for marine fish according to claim 1, characterized in that: The inner wall of the support frame (9) is respectively fitted with the outer shells of the oxygen generator (7) and the humidifier (8).

9. The low-temperature fresh-keeping device for marine fish according to claim 2, characterized in that: The exhaust assembly (510) comprises a box shell (5101), a solenoid valve (5102), a fan three (5103) and a filter (5104); the solenoid valve (5102) is installed on the inner left wall of the box shell (5101); the fan three (5103) is installed inside the box shell (5101); an exhaust port is opened on the right side of the box shell (5101), and the exhaust port is sealed by a filter (5104); the box shell (5101) is fixedly connected to the outer shell (51).

10. The low-temperature fresh-keeping device for marine fish according to claim 1, characterized in that: The air intake connection assembly (6) comprises a fixed shell (61), a one-way valve (62), a connecting pipe (63) and a threaded joint (64); the one-way valve (62) is fixed to the inner bottom end of the fixed shell (61); the top of the one-way valve (62) is connected to the connecting pipe (63), and the connecting pipe (63) is connected to the fresh-keeping box (1); the bottom of the one-way valve (62) is provided with a threaded joint (64), and the pipe joint (11) at the top of the bellows (10) is threadedly connected to the threaded joint (64); the flow direction of the one-way valve (62) is from bottom to top.

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