Low-temperature cascade refrigerating unit

Abstract

The utility model belongs to the technical field of refrigerating units, and discloses a low-temperature cascade refrigerating unit which comprises a mounting frame, four moving wheels fixedly connected to the lower end of the mounting frame, a high-temperature mechanism fixedly connected to the upper end of the mounting frame, a low-temperature mechanism fixedly connected to the upper end of the mounting frame, and two circulating pipes fixedly connected to the lower portion of the low-temperature mechanism. The upper end of the mounting frame is fixedly connected with a storage tank and an expansion tank, and the outer surface of the expansion tank is fixedly connected with a first connecting pipe. The high-temperature mechanism is matched with the low-temperature mechanism, heating and cooling can be achieved in the unit at the same time through cooperation of high temperature and low temperature, the operation cost of the unit can be effectively saved, the unit is compact in structure through an up-and-down installation mode, the occupied area of the unit can be greatly reduced, and the heat dissipation capacity of the unit during operation is effectively improved through the heat dissipation assembly; and meanwhile, the energy consumption of the unit can be reduced, and the practicability of the refrigerating unit is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration units, in particular to a low-temperature cascade refrigeration unit. Background Art

[0002] Cascade refrigeration units offer significant advantages in low-temperature refrigeration, high energy efficiency, adaptability, stability, longevity, and environmental friendliness, making them suitable for applications requiring high cooling temperatures and efficiency. By increasing the number of refrigeration cycles, cascade refrigeration units multiply the number of system components, achieving lower evaporation temperatures, typically between -40°C and -80°C. Single-stage refrigeration units typically have evaporation temperatures between -15°C and -35°C. This technology makes cascade refrigeration units more widely applicable in industries requiring low-temperature refrigeration, such as food processing, pharmaceuticals, and chemicals.

[0003] Chinese patent authorization announcement number: CN218915443U provides an ultra-low temperature cascade refrigeration unit. The arrangement of the movable support seat and the base of this solution is conducive to when the ultra-low temperature cascade refrigeration unit inside the refrigeration chassis generates vibration during operation. Spring A cushions the movable support seat at the bottom of the refrigeration chassis, thereby reducing the vibration intensity generated by the operation of the ultra-low temperature cascade refrigeration unit, thereby greatly reducing the vibration noise of the ultra-low temperature cascade refrigeration unit.

[0004] However, the following defects still exist in the specific implementation process: the cascade refrigeration unit reduces the noise during operation by setting up sound-absorbing panels, external baffles, etc. Although the noise is reduced, it also affects the heat dissipation effect, making the unit more energy-consuming.

[0005] Based on this, the present invention designs a low-temperature cascade refrigeration unit to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the prior art, the utility model provides a low-temperature cascade refrigeration unit.

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A low-temperature cascade refrigeration unit includes a mounting frame, an outer surface of the mounting frame is fixedly connected to a shell, a lower end of the mounting frame is fixedly connected to four movable wheels, a rear end of the shell is provided with a ventilation slot, an upper end of the mounting frame is fixedly connected to a high-temperature mechanism, an upper end of the mounting frame is fixedly connected to a low-temperature mechanism, a lower portion of the low-temperature mechanism is fixedly connected to two circulation pipes, an upper end of the mounting frame is fixedly connected to a storage tank, an upper end of the mounting frame is fixedly connected to an expansion tank, and an outer surface of the expansion tank is fixedly connected to a connecting pipe 1;

[0009] Furthermore, the high-temperature mechanism includes a mounting plate 1, a circulating pump is fixedly connected to the upper end of the mounting plate 1, a circulating pipe is fixedly connected to the front end of the circulating pump, a connecting pipe 2 is fixedly connected to the output end of the circulating pump, an evaporator is fixedly connected to the upper end of the mounting plate 1, and a condensing assembly is fixedly connected to the upper end of the mounting plate 1;

[0010] Furthermore, the condensation assembly includes a bracket and a condensation box, the upper end of the bracket is fixedly connected to the motor 1, the output end of the motor 1 is fixedly connected to the fan blade 1 through a coupling, and the inner surface of the condensation box is fixedly connected to the condensation pipe;

[0011] Furthermore, the low-temperature mechanism includes a second mounting plate, a condenser is fixedly connected to the upper end of the second mounting plate, a compressor is fixedly connected to the upper end of the second mounting plate, a connecting pipe 3 is fixedly connected to the front end of the compressor, and a heat dissipation component is fixedly connected to the upper end of the second mounting plate;

[0012] Furthermore, the heat dissipation assembly includes a second motor, the outer surface of the second motor is fixedly connected to a connecting cover, the front end of the connecting cover is fixedly connected to a cooling box, the lower end of the cooling box is fixedly connected to the upper end of the second mounting plate, the output end of the second motor is fixedly connected to the second fan blade through a coupling, the inner surface of the cooling box is fixedly connected to a cooling pipe, the right end of the cooling box is fixedly connected to the second connecting copper tube, and the right end of the cooling box is fixedly connected to the first connecting copper tube;

[0013] Furthermore, the front end of the third connecting pipe is fixedly connected to the outer surface of the expansion tank, the lower end of the cooling box is fixedly connected to the upper end of the second mounting plate, the lower end of the second mounting plate is fixedly connected to the upper end of the mounting frame, and the upper ends of the two flow pipes are fixedly connected to the lower end of the condenser;

[0014] Furthermore, the front end of the second connecting copper tube is fixedly connected to the rear end of the condenser, and the front end of the first connecting copper tube is fixedly connected to the outer surface of the compressor;

[0015] Furthermore, the lower end of the bracket is fixedly connected to the upper end of the mounting plate, the lower end of the condensation box is fixedly connected to the upper end of the mounting plate, the lower end of the mounting plate is fixedly connected to the upper end of the mounting frame, and the lower ends of the two flow pipes are fixedly connected to the upper end of the evaporator.

[0016] Beneficial effects

[0017] (1) This solution uses a high-temperature mechanism in conjunction with a low-temperature mechanism to achieve simultaneous heating and cooling in the unit. There is no need to set up other temperature control equipment, which can effectively save the operating cost of the unit.

[0018] (2) This solution adopts an upper and lower installation method to install the high-temperature mechanism and the low-temperature mechanism on a load-bearing frame, making the unit structure compact and greatly reducing the unit's footprint.

[0019] (3) This solution effectively improves the heat dissipation capacity of the unit during operation through the heat dissipation component, making the operation of the unit more stable, while reducing the energy consumption of the unit and improving the practicality of the refrigeration unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the high temperature mechanism of the utility model;

[0023] Figure 3 This is a schematic diagram of the condensation component of the present utility model;

[0024] Figure 4 This is a schematic diagram of the low-temperature mechanism of the utility model;

[0025] Figure 5 This is a schematic diagram of the heat dissipation component of the present invention.

[0026] The numbers in the figure represent:

[0027] 1. Mounting frame; 2. Housing; 3. Moving wheel; 4. High-temperature mechanism; 41. Mounting plate 1; 42. Circulating pump; 43. Circulating pipe; 44. Connecting pipe 2; 45. Evaporator; 46. Condensing assembly; 461. Bracket; 462. Motor 1; 463. Fan blade 1; 464. Condensing box; 465. Condensing pipe; 5. Low-temperature mechanism; 51. Mounting plate 2; 52. Condenser; 53. Compressor; 54. Connecting pipe 3; 55. Heat dissipation assembly; 551. Motor 2; 552. Connecting cover; 553. Fan blade 2; 554. Cooling box; 555. Cooling pipe; 556. Connecting copper pipe 1; 557. Connecting copper pipe 2; 6. Expansion tank; 7. Storage tank; 8. Ventilation slot; 9. Connecting pipe 1; 10. Circulation pipe. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0029] The present invention will be further described below with reference to the embodiments.

[0030] In some embodiments, please refer to the appendix of the specification. Figure 1-5 , including a mounting frame 1, the outer surface of the mounting frame 1 is fixedly connected to a shell 2, the lower end of the mounting frame 1 is fixedly connected to four moving wheels 3, the rear end of the shell 2 is provided with a ventilation slot 8, the upper end of the mounting frame 1 is fixedly connected to a high-temperature mechanism 4, the upper end of the mounting frame 1 is fixedly connected to a low-temperature mechanism 5, the lower part of the low-temperature mechanism 5 is fixedly connected to two circulation pipes 10, the upper end of the mounting frame 1 is fixedly connected to a storage tank 7, the upper end of the mounting frame 1 is fixedly connected to an expansion tank 6, and the outer surface of the expansion tank 6 is fixedly connected to a connecting pipe 9.

[0031] In the embodiment of the present invention, the high-temperature mechanism 4 and the low-temperature mechanism 5 are fixed at the same time by the mounting frame 1, and the upper and lower fixing methods are adopted, which can effectively reduce the floor space of the unit. The four movable wheels 3 are used to facilitate the movement of the position of the unit. The expansion tank 6 is used in conjunction with the connecting pipe 9 to adjust the pressure inside the unit to avoid excessive pressure affecting the operation of the unit. The high-temperature mechanism 4 and the low-temperature mechanism 5 are connected by two flow pipes 10 so that the two can cooperate and can achieve heating and cooling in the unit at the same time, thereby performing continuous refrigeration. The ventilation slots 8 are used to facilitate gas exchange between the unit and the outside world, which can help the unit to dissipate heat and make the unit run stably.

[0032] In some embodiments, as Figure 2-3As shown, as a preferred embodiment of the present utility model, the high-temperature mechanism 4 includes a mounting plate 41, the lower end of the mounting plate 41 is fixedly connected to the upper end of the mounting frame 1, the upper end of the mounting plate 41 is fixedly connected to a circulation pump 42, the front end of the circulation pump 42 is fixedly connected to a circulation pipe 43, the output end of the circulation pump 42 is fixedly connected to a connecting pipe 2 44, the upper end of the mounting plate 41 is fixedly connected to an evaporator 45, the lower ends of the two flow pipes 10 are fixedly connected to the upper end of the evaporator 45, the upper end of the mounting plate 41 is fixedly connected to a condensation assembly 46, the condensation assembly 46 includes a bracket 461 and a condensation box 464, the lower end of the bracket 461 is fixedly connected to the upper end of the mounting plate 41, the lower end of the condensation box 464 is fixedly connected to the upper end of the mounting plate 41, the upper end of the bracket 461 is fixedly connected to a motor 462, the output end of the motor 462 is fixedly connected to a fan blade 463 through a coupling, and the inner surface of the condensation box 464 is fixedly connected to a condensation pipe 465.

[0033] In an embodiment of the present utility model, the medium-temperature refrigerant in the high-temperature mechanism 4 is evaporated and cooled in the evaporator 45, so that the low-temperature refrigerant releases heat therein, and then is condensed into liquid after heat exchange with the evaporated medium-temperature refrigerant in the condenser tube 465 inside the condensation box 464, and the heat is transferred to the environment inside the unit. The formed low-temperature refrigerant liquid will enter the condenser 52 from the two flow pipes 10 and form a low-pressure gas. In this process, the motor 462 can be started to allow the fan blade 463 to rotate under the action of the motor 462 to accelerate the condensation of the medium-temperature refrigerant in the condensation box 464.

[0034] In some embodiments, as Figure 3-5 As shown, as a preferred embodiment of the present invention, the low-temperature mechanism 5 includes a second mounting plate 51, the lower end of the second mounting plate 51 is fixedly connected to the upper end of the mounting frame 1, the upper end of the second mounting plate 51 is fixedly connected to a condenser 52, the upper ends of the two flow pipes 10 are fixedly connected to the lower end of the condenser 52, the upper end of the second mounting plate 51 is fixedly connected to a compressor 53, the front end of the compressor 53 is fixedly connected to a connecting pipe 3 54, the front end of the connecting pipe 3 54 is fixedly connected to the outer surface of the expansion tank 6, the upper end of the second mounting plate 51 is fixedly connected to a heat dissipation component 55, the heat dissipation component 55 includes a second motor 551, and the outer surface of the second motor 551 is fixedly connected to a connecting cover 552, the front end of the connecting cover 552 is fixedly connected to a cooling box 554, the lower end of the cooling box 554 is fixedly connected to the upper end of the mounting plate 2 51, the lower end of the cooling box 554 is fixedly connected to the upper end of the mounting plate 2 51, the output end of the motor 2 551 is fixedly connected to the fan blade 2 553 through a coupling, the inner surface of the cooling box 554 is fixedly connected to a cooling pipe 555, the right end of the cooling box 554 is fixedly connected to a connecting copper tube 2 557, the front end of the connecting copper tube 2 557 is fixedly connected to the rear end of the condenser 52, the right end of the cooling box 554 is fixedly connected to a connecting copper tube 1 556, and the front end of the connecting copper tube 1 556 is fixedly connected to the outer surface of the compressor 53.

[0035] In an embodiment of the present utility model, low-pressure gas enters the compressor 53 and is compressed into high-pressure gas, enters the condenser 52 through the connecting copper tube 2 557 and the connecting copper tube 1 556 to release heat, and finally becomes liquid and returns to the evaporator 45 from the two circulation tubes 10 to continue absorbing heat. The coolant transfers heat to the refrigerant through heat exchange with the refrigerant, thereby achieving cooling. In this process, the motor 2 551 can be started to allow the fan blade 2 553 to rotate under the action of the motor 2 551, and cooperate with the cooling box 554 to cool the high-pressure gas passing through the cooling tube 555. At the same time, the hot gas inside the unit can be discharged and sent to the environment outside the unit, which can enable the unit to maintain a suitable temperature operation and reduce energy consumption.

[0036] It should be noted that the specific installation methods, circuit connection methods and control methods of motor 1 462, motor 2 551, evaporator 45, condenser 52, compressor 53 and circulating pump 42 in the present invention are all conventional designs and will not be elaborated in detail in the present invention.

[0037] Working principle: When a low-temperature cascade refrigeration unit is needed for refrigeration, the medium-temperature refrigerant is allowed to evaporate and cool in the evaporator 45, so that the low-temperature refrigerant releases heat therein, and then is condensed into liquid after heat exchange with the evaporated medium-temperature refrigerant in the condenser tube 465 inside the condenser box 464, and the heat is transferred to the environment inside the unit. The formed low-temperature refrigerant liquid will enter the condenser 52 from the two flow pipes 10 and form a low-pressure gas. In this process, the motor 1 462 can be started to rotate the fan blade 1 463 under the action of the motor 1 462 to accelerate the condensation of the medium-temperature refrigerant in the condenser box 464. The low-pressure gas enters the compressor 53 through the two flow pipes 10 and is compressed into high-pressure gas. By connecting the copper tube 2 557 and The connecting copper tube 1 556 enters the condenser 52 to release heat, and finally turns into liquid and returns to the evaporator 45 from the two circulation tubes 10 to continue absorbing heat. The coolant transfers heat to the refrigerant through heat exchange with the refrigerant, thereby achieving cooling. In this process, the motor 2 551 can be started to allow the fan blade 2 553 to rotate under the action of the motor 2 551, and cooperate with the cooling box 554 to cool the high-pressure gas passing through the cooling tube 555. At the same time, the hot gas inside the unit can be discharged and sent to the environment outside the unit, which can enable the unit to maintain a suitable temperature operation and reduce energy consumption. At the same time, the expansion tank 6 can be used in conjunction with the connecting tube 1 9 to adjust the pressure inside the unit to avoid excessive pressure affecting the operation of the unit.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A low-temperature cascade refrigeration unit, comprising a mounting frame (1), characterized in that: The outer surface of the mounting frame (1) is fixedly connected to a shell (2), the lower end of the mounting frame (1) is fixedly connected to four moving wheels (3), the rear end of the shell (2) is provided with a ventilation slot (8), the upper end of the mounting frame (1) is fixedly connected to a high-temperature mechanism (4), the upper end of the mounting frame (1) is fixedly connected to a low-temperature mechanism (5), the lower part of the low-temperature mechanism (5) is fixedly connected to two circulation pipes (10), the upper end of the mounting frame (1) is fixedly connected to a storage tank (7), the upper end of the mounting frame (1) is fixedly connected to an expansion tank (6), and the outer surface of the expansion tank (6) is fixedly connected to a connecting pipe (9).

2. The low-temperature cascade refrigeration unit according to claim 1, characterized in that: The high-temperature mechanism (4) includes a mounting plate 1 (41), the upper end of the mounting plate 1 (41) is fixedly connected to a circulation pump (42), the front end of the circulation pump (42) is fixedly connected to a circulation pipe (43), the output end of the circulation pump (42) is fixedly connected to a connecting pipe 2 (44), the upper end of the mounting plate 1 (41) is fixedly connected to an evaporator (45), and the upper end of the mounting plate 1 (41) is fixedly connected to a condensing assembly (46).

3. The low-temperature cascade refrigeration unit according to claim 2, characterized in that: The condensation assembly (46) includes a bracket (461) and a condensation box (464), the upper end of the bracket (461) is fixedly connected to a motor 1 (462), the output end of the motor 1 (462) is fixedly connected to a fan blade 1 (463) through a coupling, and the inner surface of the condensation box (464) is fixedly connected to a condensation pipe (465).

4. The low-temperature cascade refrigeration unit according to claim 3, characterized in that: The low-temperature mechanism (5) includes a second mounting plate (51), the upper end of the second mounting plate (51) is fixedly connected to a condenser (52), the upper end of the second mounting plate (51) is fixedly connected to a compressor (53), the front end of the compressor (53) is fixedly connected to a third connecting pipe (54), and the upper end of the second mounting plate (51) is fixedly connected to a heat dissipation component (55).

5. The low-temperature cascade refrigeration unit according to claim 4, characterized in that: The heat dissipation assembly (55) includes a second motor (551), the outer surface of the second motor (551) is fixedly connected to a connection cover (552), the front end of the connection cover (552) is fixedly connected to a cooling box (554), the lower end of the cooling box (554) is fixedly connected to the upper end of the second mounting plate (51), the output end of the second motor (551) is fixedly connected to the second fan blade (553) through a coupling, the inner surface of the cooling box (554) is fixedly connected to a cooling pipe (555), the right end of the cooling box (554) is fixedly connected to the second connecting copper pipe (557), and the right end of the cooling box (554) is fixedly connected to the first connecting copper pipe (556).

6. The low-temperature cascade refrigeration unit according to claim 5, characterized in that: The front end of the third connecting pipe (54) is fixedly connected to the outer surface of the expansion tank (6), the lower end of the second mounting plate (51) is fixedly connected to the upper end of the mounting frame (1), and the upper ends of the two flow pipes (10) are fixedly connected to the lower end of the condenser (52).

7. The low-temperature cascade refrigeration unit according to claim 5, characterized in that: The front end of the second connecting copper tube (557) is fixedly connected to the rear end of the condenser (52), and the front end of the first connecting copper tube (556) is fixedly connected to the outer surface of the compressor (53).

8. The low-temperature cascade refrigeration unit according to claim 3, characterized in that: The lower end of the bracket (461) is fixedly connected to the upper end of the mounting plate (41), the lower end of the condensation box (464) is fixedly connected to the upper end of the mounting plate (41), the lower end of the mounting plate (41) is fixedly connected to the upper end of the mounting frame (1), and the lower ends of the two flow pipes (10) are fixedly connected to the upper end of the evaporator (45).

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