Modularized indirect refrigeration display cabinet system

Abstract

The utility model discloses a modularized indirect refrigeration display cabinet system which comprises a compressor refrigeration circulation pipeline and a display cabinet refrigeration circulation pipeline which are mutually independent, and glycerol water solution circularly flows in the display cabinet refrigeration circulation pipeline. A refrigerant in the compressor refrigeration circulation pipeline exchanges heat with a glycerol water solution in the display cabinet refrigeration circulation pipeline through the evaporator, the evaporator comprises a sealed shell, and the refrigerant and the glycerol water solution are mixed in the sealed shell for heat exchange; according to the utility model, a plurality of display cabinets can be simultaneously refrigerated, the utilization rate of refrigeration equipment is improved, the production and operation cost is reduced, the benefit is improved, the heat exchange efficiency is greatly improved, the energy loss is reduced, and the whole refrigeration system is of a totally-closed structure, so that the safe operation of the glycerol refrigeration system is ensured; evaporation and overflow are avoided at high temperature, moisture in air is not absorbed at low temperature, and the proportion of a cooling medium is not changed due to changes of external pressure and temperature during operation.

Description

Technical Field

[0001] This utility model relates to the field of display cabinet cooling technology, and in particular to a modular indirect cooling display cabinet system. Background Technology

[0002] Currently, most display cases in shopping malls are remote-controlled refrigerated display cases, which mainly rely on direct refrigeration. This refrigeration mode can only be operated individually and cannot be connected to multiple display cases, resulting in low utilization of the refrigeration equipment. Patent application CN202411679896.0 discloses a two-phase cooling system, comprising: an independent compressor refrigeration cycle loop and an equipment heat dissipation cycle loop. The refrigerant in the compressor refrigeration cycle loop and the refrigerant in the equipment heat dissipation cycle loop exchange heat through an evaporator. The evaporator includes a first heat exchange pipe in the equipment heat dissipation cycle loop and a second heat exchange pipe in the compressor refrigeration cycle loop. The equipment heat dissipation cycle loop includes a heating device, a liquid receiver, and a three-way valve. The inlet of the three-way valve is connected to the refrigerant outlet of the heating device, the first outlet of the three-way valve is directly connected to the liquid receiver, and the second outlet of the three-way valve is connected to the liquid receiver through the first heat exchange pipe. Although this cooling system can cool multiple display cases and solves the problem of high supply liquid temperature caused by ambient temperature in two-phase cooling systems, the refrigerant in this system uses two heat exchange pipes in the evaporator for heat exchange, resulting in low heat exchange efficiency and significant energy loss. This is especially true when using display cases, where the coolant consumption is large, leading to even greater energy loss. To address these issues, this application proposes a modular indirect cooling display cabinet system. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a modular indirect refrigeration display cabinet system with high heat exchange efficiency and low energy loss.

[0004] To solve the above-mentioned technical problems, this utility model includes a compressor refrigeration circulation pipeline and a display cabinet refrigeration circulation pipeline that are independent of each other. A glycerol aqueous solution circulates in the display cabinet refrigeration circulation pipeline. The refrigerant in the compressor refrigeration circulation pipeline and the glycerol aqueous solution in the display cabinet refrigeration circulation pipeline exchange heat through an evaporator. The evaporator includes a sealed shell, and the refrigerant and the glycerol aqueous solution mix and exchange heat within the sealed shell.

[0005] Preferably, the compressor refrigeration cycle pipeline includes a compressor, a condenser, and a throttling element connected through a first cycle pipeline, and the first cycle pipeline is connected to a sealed housing.

[0006] Preferably, the refrigeration circulation pipeline of the display cabinet includes a second circulation pipeline, a third circulation pipeline and a cold storage tank. The cold storage tank is connected to the sealed shell through the second circulation pipeline, and the cold storage tank is also connected to multiple display cabinets through the third circulation pipeline. A circulation pump is provided on the liquid inlet pipe of both the second circulation pipeline and the third circulation pipeline.

[0007] Preferably, the cold storage tank is equipped with a temperature sensor, and the cold storage tank is connected to a liquid replenishment pipe, and the liquid replenishment pipe is equipped with a first solenoid valve.

[0008] Preferably, the sealed housing is divided into a mixing chamber, a transition chamber, and a draining chamber by two partitions distributed vertically. The mixing chamber is provided with two inlet pipes, and the draining chamber is provided with a drain pipe. The transition chamber and the draining chamber are connected by a first transfer pipe and a second solenoid valve is provided on the first transfer pipe. The mixing chamber and the transition chamber are connected by a second transfer pipe and a third solenoid valve is provided on the first transfer pipe.

[0009] Preferably, a drying filter is provided on the outer side of the sealed housing, and an exhaust port is provided at the upper end of both the mixing chamber and the transition chamber. The exhaust port is connected to the air inlet end of the drying filter, and the air outlet end of the drying filter is connected to the exhaust pipe head.

[0010] Preferably, the mixing chamber is equipped with a stirrer, and the sealed housing is equipped with a motor that drives the stirrer.

[0011] Preferably, liquid level sensors are installed on the inner walls of both the transition chamber and the mixing chamber, and the height of the liquid level sensors is lower than the height of the vent hole.

[0012] The beneficial effects of this utility model are as follows: This utility model circulates traditional refrigerant and glycerol aqueous solution through the compressor refrigeration circulation pipeline and the display cabinet refrigeration circulation pipeline, respectively. The refrigerant and glycerol aqueous solution are mixed by an evaporator. The refrigerant absorbs the heat of the glycerol aqueous solution and cools it down. The glycerol aqueous solution is then used to circulate and cool the display cabinet, enabling simultaneous cooling of multiple display cabinets. This improves the utilization rate of the refrigeration equipment, reduces production and operating costs, and increases efficiency. At the same time, the mixed heat exchange method greatly improves heat exchange efficiency and reduces energy loss. The entire refrigeration system is a fully enclosed structure, ensuring the safe operation of the glycerol refrigeration system. There is no evaporation overflow at high temperatures and no absorption of moisture from the air at low temperatures. The proportion of the cooling medium will not change due to changes in external pressure and temperature during operation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the system structure connection of this utility model;

[0014] Figure 2This is a schematic diagram of the evaporator in this utility model.

[0015] In the diagram: 1. Compressor; 2. Condenser; 3. Throttling element; 4. Evaporator; 41. Sealing shell; 42. Baffle; 43. Mixing chamber; 44. Transition chamber; 45. Drain chamber; 46. Inlet pipe; 47. Drain pipe; 48. First transfer pipe; 49. Second solenoid valve; 410. Second transfer pipe; 411. Third solenoid valve; 412. Stirrer; 413. Motor; 414. Dryer filter; 415. Exhaust port; 416. Exhaust pipe; 417. Liquid level sensor; 5. Cold storage tank; 6. Circulation pump; 7. Display case; 8. First circulation pipeline; 9. Second circulation pipeline; 10. Third circulation pipeline; 11. Temperature sensor; 12. Make-up pipe; 13. First solenoid valve. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. All directional indicators (such as up, down, left, right, front, back, etc.) in the present utility model are only used to explain the relative positional relationship and movement of each component in a certain posture (as shown in the accompanying drawings). If the specific posture changes, the directional indicator will also change accordingly.

[0017] like Figure 1-2 As shown, this embodiment provides a modular indirect refrigeration display cabinet system, including independent compressor refrigeration circulation pipelines and display cabinet refrigeration circulation pipelines. The compressor refrigeration circulation pipelines circulate traditional refrigerants, such as Freon, natural refrigerants, or HFO (hydrofluoroolefin) refrigerants. In this example, ammonia is selected as a natural refrigerant due to its high energy efficiency, low cost, and environmental friendliness. Other types of refrigerants can also be used, selected according to actual conditions. The display cabinet refrigeration circulation pipelines circulate glycerol aqueous solution. The refrigerant in the compressor refrigeration circulation pipelines and the glycerol aqueous solution in the display cabinet refrigeration circulation pipelines exchange heat through an evaporator 4. The evaporator 4 includes a sealed shell 41. The refrigerant and glycerol aqueous solution mix and exchange heat within the sealed shell 41. After absorbing heat, the refrigerant evaporates and enters the compressor refrigeration circulation pipelines for reuse. The glycerol aqueous solution releases heat and cools down, entering the display cabinet refrigeration circulation pipelines and then flowing into the display cabinet 7 for refrigeration. Experiments have verified that the indirect refrigeration design, compared with traditional refrigeration methods, results in more stable temperatures, higher heat exchange temperature in evaporator 4, and a significantly better cooling effect than traditional refrigeration methods.

[0018] The compressor refrigeration cycle pipeline is a conventional refrigeration module, which includes a compressor 1, a condenser 2 and a throttling element 3. The compressor 1, condenser 2 and throttling element 3 are connected through a first circulation pipeline 8, which is connected to a sealed housing 41. The first circulation pipeline 8 is used to input the liquefied refrigerant into the sealed housing 41 to mix with the glycerol aqueous solution for heat exchange.

[0019] like Figure 1 As shown, the refrigeration circulation pipeline of the display case includes a second circulation pipeline 9, a third circulation pipeline 10, and a cold storage tank 5. The cold storage tank 5 is connected to the sealed shell 41 through the second circulation pipeline 9, and the cold storage tank 5 is also connected to multiple display cases 7 through the third circulation pipeline 10. Both the inlet pipes of the second circulation pipeline 9 and the third circulation pipeline 10 are equipped with circulation pumps 6. The circulation pumps 6 inject the glycerol aqueous solution in the cold storage tank 5 into the sealed shell 41 to mix and exchange heat with the liquid refrigerant, and then inject the glycerol aqueous solution after heat exchange and cooling into the cold storage tank 5, thereby maintaining a continuous low temperature in the cold storage tank 5. At the same time, the circulation pumps 6 input the low-temperature glycerol aqueous solution into the display case 7 through the third circulation pipeline 10 for cooling. The glycerol aqueous solution absorbs heat during cooling, and its temperature rises. The heated glycerol aqueous solution is then drawn back into the cold storage tank 5 through the third circulation pipeline 10 for cooling. Furthermore, a temperature sensor 11 is installed on the cold storage tank 5 to detect the temperature of the glycerol aqueous solution in real time, thereby facilitating the adjustment of the refrigerant input. The cold storage tank 5 is connected to a liquid replenishment pipe 12, and the liquid replenishment pipe 12 is equipped with a first solenoid valve 13 for replenishing the low-temperature glycerol aqueous solution, thereby quickly cooling the glycerol aqueous solution and avoiding refrigeration failure caused by a malfunction in the compressor refrigeration cycle pipeline.

[0020] like Figure 2 As shown, the sealed housing 41 is divided into a mixing chamber 43, a transition chamber 44, and a drain chamber 45 by two vertically distributed partitions 42. The mixing chamber is equipped with two inlet pipes 46, and the drain chamber 45 is equipped with a drain pipe 47. The transition chamber 44 and the drain chamber 45 are connected by a first transfer pipe 48, and a second solenoid valve 49 is installed on the first transfer pipe 48. The mixing chamber 43 and the transition chamber 44 are connected by a second transfer pipe 410, and a third solenoid valve 411 is installed on the first transfer pipe 48. The mixing and separation of the refrigerant and the glycerol aqueous solution are separated to avoid insufficient heat exchange and energy waste. At the same time, a stirrer 412 is provided in the mixing chamber, and a motor 413 for driving the stirrer 412 is installed on the sealed housing 41 to improve the mixing uniformity of the refrigerant and the glycerol aqueous solution and improve the heat exchange efficiency. The opening and closing of the second solenoid valve 49 and the third solenoid valve 411 realizes the flow of liquid between the three chambers.

[0021] A dryer filter 414 is provided on the outside of the sealed housing 41. The dryer filter 414 is fixed to the outside of the sealed housing 41 by a bracket. The upper ends of the mixing chamber 43 and the transition chamber 44 are provided with exhaust holes 415. The two exhaust holes 415 are connected by an exhaust pipe, and the exhaust pipe is connected to the air inlet of the dryer filter 414. The air outlet of the dryer filter 414 is connected to the exhaust pipe head 416. This is used to dry the refrigerant and prevent water vapor in the refrigerant from affecting the cooling effect. At the same time, liquid level sensors 417 are installed on the inner walls of the mixing chamber 43 and the transition chamber 44. The height of the liquid level sensor 417 is lower than the height of the exhaust hole 415. The liquid level in the mixing chamber 43 and the transition chamber 44 is lower than the liquid level sensor 417, which ensures that the gaseous refrigerant can enter the dryer filter 414.

[0022] Its working principle is as follows: Compressor 1 compresses the refrigerant into a high-temperature, high-pressure gas, which enters the condenser 2 and condenses into a liquid. The refrigerant releases heat during condensation. The condensed liquid refrigerant enters the evaporator 4 through the throttling element 3. At the same time, the glycerol aqueous solution is also pumped into the evaporator 4 by the circulating pump 6. The refrigerant and the glycerol aqueous solution mix and exchange heat in the evaporator 4. The refrigerant absorbs heat and evaporates, forming a gas. The evaporated gaseous refrigerant enters the first circulation pipe and is drawn back by the compressor 1, entering the next refrigeration cycle. The glycerol aqueous solution is cooled after heat exchange and enters the cold storage tank 5 through the second circulation pipe. The circulating pump 6 draws the glycerol aqueous solution in the cold storage tank 5 into the third circulation pipe. The cooled glycerol aqueous solution is sent to the parallel display cabinet 7 through the third circulation pipe. At this time, the glycerol aqueous solution takes away the heat in the display cabinet 7, and the temperature rises. It returns to the cold storage tank 5 through the third circulation pipe and is sent to the evaporator 4 through the second circulation pipe for heat exchange. After being cooled, it enters the next closed refrigeration cycle. The system circulates traditional refrigerant and glycerol aqueous solution through the compressor refrigeration circulation pipeline and the display cabinet refrigeration circulation pipeline, respectively. The evaporator 4 mixes the refrigerant and glycerol aqueous solution. The refrigerant absorbs the heat from the glycerol aqueous solution, cooling it down. The glycerol aqueous solution is then used to circulate and cool the display cabinet 7. This allows for simultaneous cooling of multiple display cabinets 7, improving the utilization rate of the refrigeration equipment, reducing production and operating costs, and increasing efficiency. The mixed heat exchange method significantly improves heat exchange efficiency and reduces energy loss. The entire refrigeration system is a fully enclosed structure, ensuring the safe operation of the glycerol refrigeration system. There is no evaporation or overflow at high temperatures and no absorption of moisture from the air at low temperatures. The proportion of the cooling medium will not change due to changes in external pressure and temperature during operation.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular indirect refrigeration display cabinet system comprising compressor refrigeration cycle piping and display cabinet refrigeration cycle piping independent of one another, characterized in that, The gondola refrigeration cycle pipeline circulates glycerol water solution, the refrigerant in the compressor refrigeration cycle pipeline exchanges heat with the glycerol water solution in the gondola refrigeration cycle pipeline through an evaporator, the evaporator comprises a sealed shell, the refrigerant and the glycerol water solution exchange heat in the sealed shell, the inside of the sealed shell is divided into a mixed liquid chamber, a transition chamber and a liquid discharge chamber by two partition plates distributed up and down, two liquid inlet pipe heads are arranged on the mixed liquid chamber, a liquid discharge pipe head is arranged on the liquid discharge chamber, the transition chamber and the liquid discharge chamber are connected through a first liquid transfer pipe, and a second electromagnetic valve is arranged on the first liquid transfer pipe, the mixed liquid chamber and the transition chamber are connected through a second liquid transfer pipe, and a third electromagnetic valve is arranged on the first liquid transfer pipe.

2. A modular indirect refrigeration display cabinet system according to claim 1, wherein, The compressor refrigeration cycle pipeline comprises a compressor, a condenser and a throttling element connected through a first circulation pipeline, and the first circulation pipeline is communicated with the sealed shell.

3. A modular indirect refrigerated display cabinet system according to claim 1, wherein, The gondola refrigeration cycle pipeline comprises a second circulation pipeline, a third circulation pipeline and a cold storage tank, the cold storage tank is connected with the sealed shell through the second circulation pipeline, the cold storage tank is also connected with a plurality of gondolas through the third circulation pipeline, and a circulating pump is arranged on the liquid inlet pipe of the second circulation pipeline and the third circulation pipeline.

4. A modular indirect refrigerated display cabinet system according to claim 3, wherein, A temperature sensor is arranged on the cold storage tank, a liquid supplement pipe is connected with the cold storage tank, and a first electromagnetic valve is arranged on the liquid supplement pipe.

5. A modular indirect refrigeration display cabinet system according to claim 1, wherein, A stirrer is arranged in the mixed liquid chamber, and a motor for driving the stirrer is arranged on the sealed shell.

6. A modular indirect refrigeration display cabinet system according to claim 1, wherein, A drying filter is arranged on the outside of the sealed shell, exhaust holes are arranged on the upper ends of the mixed liquid chamber and the transition chamber, the exhaust holes are connected with the air inlet end of the drying filter, and the air outlet end of the drying filter is connected with a liquid discharge pipe head.

7. A modular indirect refrigerated display cabinet system according to claim 6, wherein, Liquid level sensors are arranged on the inner walls of the transition chamber and the mixed liquid chamber, and the height of the liquid level sensors is lower than the height of the exhaust holes.

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