Multi-stage sleeve air conditioner

Abstract

The utility model belongs to the technical field of refrigeration, and particularly relates to a multi-stage sleeve air conditioner which comprises a liquid storage tank, a compressor, a first-stage heat exchange unit, a second-stage heat exchange unit and a third-stage heat exchange unit, an outlet of the liquid storage tank is connected with an inlet of the compressor, an outlet of the compressor is connected with a refrigerant channel inlet of the first-stage heat exchange unit, and an outlet of the second-stage heat exchange unit is connected with a refrigerant channel outlet of the third-stage heat exchange unit. A refrigerant channel outlet of the third-stage heat exchange unit is connected with an inlet of a liquid storage tank, a throttling element is arranged between a refrigerant channel outlet of the first-stage heat exchange unit and a refrigerant channel inlet of the second-stage heat exchange unit, one end of an inner pipe of the first-stage heat exchange unit is a water inlet, and the other end of the inner pipe of the first-stage heat exchange unit is a water outlet. One end of the second-stage heat exchange unit inner pipe is an air inlet, the other end is an air outlet, one end of the third-stage heat exchange unit inner pipe is an anti-freezing liquid inlet, and the other end is an anti-freezing liquid outlet. The device can simultaneously produce hot water, cold air and subzero anti-freezing solution, fully utilizes energy, reduces energy waste, does not need to carry ice cubes, saves time and labor, and is low in labor cost.

Description

Technical Field:

[0001] The utility model belongs to the technical field of refrigeration, and particularly refers to a multi-stage sleeve air conditioner. Background Art:

[0002] Individual quick freezing refers to the separate quick freezing of each piece of food. It does not stick to other foods that are frozen simultaneously and usually has no pre-packaging. The individual quick freezer, abbreviated as IQF freezer, is used for individual quick freezing, that is, a quick freezer for realizing individual quick freezing, and it is a kind of quick freezer. Before entering the IQF freezer for quick freezing, it is necessary to perform an ice glazing treatment on the food. Ice glazing means evenly coating a layer of ice film on the surface of unpackaged frozen food.

[0003] The ice glazing machine is a machine for coating an ice film on the surface of aquatic products. The ice shaving machine includes a water tank leading to the IQF freezer. Ice blocks are respectively arranged on both sides of the water tank. The aquatic products are placed at one end of the water tank and flow to the IQF freezer through the water flow. During this process, cold air is introduced into the water. On the one hand, it makes the aquatic products roll to prevent adjacent aquatic products from sticking, and on the other hand, it cools the water. The function of the ice blocks is also to cool the water.

[0004] The existing devices for manufacturing cold air and ice blocks are separate, without making full use of energy, and it is time-consuming and laborious to transport the ice blocks, with a high labor cost. Summary of the Invention:

[0005] The purpose of the utility model is to provide a multi-stage sleeve air conditioner, which can simultaneously manufacture hot water, cold air, and antifreeze at sub-zero temperature, make full use of energy, reduce energy waste, and there is no need to transport ice blocks, saving time and effort, with a low labor cost.

[0006] The utility model is realized as follows:

[0007] A multi-stage sleeve air conditioner includes a liquid storage tank, a compressor, a first-stage heat exchange unit, a second-stage heat exchange unit, and a third-stage heat exchange unit. Each stage of the heat exchange unit includes an inner tube and an outer tube sleeved outside the inner tube. A refrigerant channel for the refrigerant to flow is left between the inner tube and the outer tube. The refrigerant channels of each stage of the heat exchange unit are sequentially connected. The outlet of the liquid storage tank is connected to the inlet of the compressor, the outlet of the compressor is connected to the inlet of the refrigerant channel of the first-stage heat exchange unit, the outlet of the refrigerant channel of the third-stage heat exchange unit is connected to the inlet of the liquid storage tank, and a throttling element is provided between the outlet of the refrigerant channel of the first-stage heat exchange unit and the inlet of the refrigerant channel of the second-stage heat exchange unit. One end of the inner tube of the first-stage heat exchange unit is the water inlet and the other end is the water outlet. One end of the inner tube of the second-stage heat exchange unit is the air inlet and the other end is the air outlet. One end of the inner tube of the third-stage heat exchange unit is the antifreeze inlet and the other end is the antifreeze outlet.

[0008] In the above-mentioned multi-stage sleeve air conditioner, the refrigerant is Freon, R410A refrigerant, or R32 refrigerant.

[0009] In the above-mentioned multi-stage casing air conditioner, the throttling element is a capillary tube or an expansion valve.

[0010] In the above-mentioned multi-stage casing air conditioner, a dryer filter is provided between the refrigerant passage outlet of the primary heat exchange unit and the throttling element.

[0011] In the above-mentioned multi-stage casing air conditioner, the water inlet of the inner tube of the primary heat exchange unit is connected to the water outlet of tap water, and the water outlet of the inner tube of the primary heat exchange unit is connected to a water supply pipe.

[0012] In the above-mentioned multi-stage casing air conditioner, the air inlet of the inner tube of the secondary heat exchange unit is connected to an air outlet device, and the air outlet of the inner tube of the secondary heat exchange unit is connected to an air supply pipe.

[0013] In the above-mentioned multi-stage casing air conditioner, the air outlet device is an air pump or a fan.

[0014] In the above-mentioned multi-stage casing air conditioner, the antifreeze inlet of the inner tube of the tertiary heat exchange unit is connected to the liquid outlet of the antifreeze storage tank, the antifreeze outlet of the inner tube of the tertiary heat exchange unit is connected to the liquid inlet of the ice-making machine water tank evaporator, and the liquid outlet of the ice-making machine water tank evaporator is connected to the liquid inlet of the antifreeze storage tank.

[0015] In the above-mentioned multi-stage casing air conditioner, a water pump is provided between the liquid outlet of the antifreeze storage tank and the antifreeze inlet of the inner tube of the tertiary heat exchange unit.

[0016] In the above-mentioned multi-stage casing air conditioner, two or more secondary heat exchange units are arranged in parallel. The air inlets of the inner tubes of each secondary heat exchange unit are connected to a main air inlet pipe, and a pressure gauge is provided on the main air inlet pipe. The refrigerant passage inlets of each secondary heat exchange unit are respectively connected to a liquid inlet branch pipe, and the liquid inlet branch pipes are connected to a main liquid inlet pipe. The inlet of the throttling element is connected to the refrigerant passage outlet of the primary heat exchange unit, and the outlet is connected to the main liquid inlet pipe. A valve is provided on at least one liquid inlet branch pipe.

[0017] In the above-mentioned multi-stage casing air conditioner, a controller is further included, and the valve and the pressure gauge are respectively electrically connected to the controller.

[0018] In the above-mentioned multi-stage casing air conditioner, the valve is a solenoid valve or an electric valve.

[0019] In the above-mentioned multi-stage casing air conditioner, the primary heat exchange unit, the secondary heat exchange unit, and the tertiary heat exchange unit are respectively bent into coil pipes, and the compressor is arranged inside the coil pipes.

[0020] In the above-mentioned multi-stage casing air conditioner, the primary heat exchange unit, the secondary heat exchange unit, and the tertiary heat exchange unit are respectively bent into coil pipes with two or more turns.

[0021] In the above-mentioned multi-stage casing air conditioner, the refrigerant channel inlets of each heat exchange unit are arranged at the outlet ends of the inner pipes of each heat exchange unit, and the refrigerant channel outlets of each heat exchange unit are arranged at the inlet ends of the inner pipes of each heat exchange unit.

[0022] In the above-mentioned multi-stage casing air conditioner, the outlet of the liquid storage tank is connected to the inlet of the compressor through Pipe 1, the outlet of the compressor is connected to the refrigerant channel inlet of the first-stage heat exchange unit through Pipe 2, the refrigerant channel outlet of the first-stage heat exchange unit is connected to the inlet of the dryer filter through Pipe 3, the refrigerant channel outlets of each second-stage heat exchange unit are respectively connected to Pipe 4, Pipe 4 is communicated with the refrigerant channel inlet of the third-stage heat exchange unit through Pipe 5, and the refrigerant channel outlet of the third-stage heat exchange unit is communicated with the inlet of the liquid storage tank through Pipe 6.

[0023] The outstanding advantages of the present utility model compared with the prior art are:

[0024] 1. The present utility model can simultaneously produce hot water, cold air, and antifreeze below zero, make full use of energy, reduce energy waste, and there is no need to transport ice cubes, saving time and labor and having a low labor cost;

[0025] 2. The present utility model is provided with a dryer filter between the refrigerant channel outlet of the first-stage heat exchange unit and the throttling element, effectively filtering the moisture and impurities mixed in the refrigerant;

[0026] 3. The present utility model is provided with a pressure gauge on the air inlet main pipe, the refrigerant channel inlets of each second-stage heat exchange unit are respectively connected to the liquid inlet branch pipes, the liquid inlet branch pipes are connected to the liquid inlet main pipe, the inlet of the throttling element is connected to the refrigerant channel outlet of the first-stage heat exchange unit, the outlet is connected to the liquid inlet main pipe, and at least one liquid inlet branch pipe is provided with a valve, effectively removing the ice formation at the air supply pipe outlet, playing a defrosting role, and there is no need for manual defrosting, with simple and convenient operation;

[0027] 4. The refrigerant channel inlets of each heat exchange unit of the present utility model are arranged at the outlet ends of the inner pipes of each heat exchange unit, and the refrigerant channel outlets of each heat exchange unit are arranged at the inlet ends of the inner pipes of each heat exchange unit, with good heat exchange effect. Description of the Drawings:

[0028] Figure 1 is the three-dimensional view of the present utility model without the water supply pipe, air supply pipe, and antifreeze liquid storage tank Figure 1 ;

[0029] Figure 2 is the three-dimensional view of the present utility model without the water supply pipe, air supply pipe, and antifreeze liquid storage tank Figure 2 ;

[0030] Figure 3 is the structural schematic diagram of the present utility model.

[0031] Reference numerals: 1, liquid storage tank; 2, compressor; 3, primary heat exchange unit; 4, secondary heat exchange unit; 5, tertiary heat exchange unit; 6, throttling element; 7, dryer filter; 8, water supply pipe; 9, gas supply pipe; 10, antifreeze liquid storage tank; 11, ice wrapping machine water tank evaporator; 12, total air inlet pipe; 13, liquid inlet branch pipe; 14, total liquid inlet pipe; 15, valve; 16, pipe one; 17, pipe two; 18, pipe three; 19, pipe four; 20, pipe five; 21, pipe six; 22, water pump; 23, air outlet device. Specific implementation manner:

[0032] The following further describes the present utility model with specific embodiments. Refer to Figure 1 —3:

[0033] A multi-stage sleeve air conditioner includes a liquid storage tank 1, a compressor 2, a primary heat exchange unit 3, a secondary heat exchange unit 4, and a tertiary heat exchange unit 5. Each heat exchange unit includes an inner pipe and an outer pipe sleeved outside the inner pipe. A refrigerant channel for refrigerant flow is left between the inner pipe and the outer pipe. The refrigerant channels of each heat exchange unit are connected in sequence. The outlet of the liquid storage tank 1 is connected to the inlet of the compressor 2, the outlet of the compressor 2 is connected to the inlet of the refrigerant channel of the primary heat exchange unit 3, the outlet of the refrigerant channel of the tertiary heat exchange unit 5 is connected to the inlet of the liquid storage tank 1, a throttling element 6 is provided between the outlet of the refrigerant channel of the primary heat exchange unit 3 and the inlet of the refrigerant channel of the secondary heat exchange unit 4. One end of the inner pipe of the primary heat exchange unit 3 is the water inlet and the other end is the water outlet. One end of the inner pipe of the secondary heat exchange unit 4 is the air inlet and the other end is the air outlet. One end of the inner pipe of the tertiary heat exchange unit 5 is the antifreeze inlet and the other end is the antifreeze outlet.

[0034] The working principle of the present utility model: As Figures 1 - 3 shown, after the gaseous refrigerant in the liquid storage tank 1 is extracted by the compressor 2 and forms a high-temperature and high-pressure gas state, it enters the refrigerant channel of the primary heat exchange unit 3 and exchanges heat with the cold water in the inner pipe of the primary heat exchange unit 3 to form a normal-temperature and high-pressure liquid state. The temperature of the cold water in the inner pipe of the primary heat exchange unit 3 rises to form hot water. The normal-temperature and high-pressure liquid refrigerant coming out of the outlet of the refrigerant channel of the primary heat exchange unit 3 forms a gas-liquid mixture state after passing through the throttling element 6. The gas-liquid mixture refrigerant enters the refrigerant channel of the secondary heat exchange unit 4 and exchanges heat with the normal-temperature gas in the inner pipe of the secondary heat exchange unit 4, and enters the refrigerant channel of the tertiary heat exchange unit 5 and exchanges heat with the normal-temperature antifreeze in the inner pipe of the tertiary heat exchange unit 5 to form a gas state. The temperature of the gas in the inner pipe of the secondary heat exchange unit 4 decreases to form cold air, and the temperature of the antifreeze in the inner pipe of the tertiary heat exchange unit 5 decreases to form sub-zero antifreeze.

[0035] In this embodiment, the cold air temperature is usually in the teens below zero, and the temperature of the cooled antifreeze is usually between -20°C and -15°C.

[0036] The hot water with an increased temperature is used for defrosting the mesh belt of the single-freezing machine; the cold air is used to be introduced into the water tank of the ice-packing machine; the antifreeze at a sub-zero temperature is used for freezing the evaporator 11 of the water tank of the ice-packing machine to cool down the water in the water tank, replacing the ice cubes.

[0037] The utility model can simultaneously produce hot water, cold air, and antifreeze at a sub-zero temperature, make full use of energy, reduce energy waste, and there is no need to carry ice cubes, saving time and labor with low labor costs.

[0038] Preferably, the refrigerant is Freon, R410A refrigerant or R32 refrigerant. In this embodiment, the refrigerant is Freon.

[0039] Furthermore, the throttling element 6 is a capillary tube or an expansion valve. In this embodiment, the throttling element 6 is a capillary tube.

[0040] In order to filter the moisture and impurities mixed in the refrigerant, as Figures 1 - 3 shown, a drying filter 7 is provided between the refrigerant channel outlet of the primary heat exchange unit 3 and the throttling element 6.

[0041] The connection structure of the inner tube of the primary heat exchange unit 3: as Figure 3 shown, the water inlet of the inner tube of the primary heat exchange unit 3 is connected to the water outlet of the tap water, and the water outlet of the inner tube of the primary heat exchange unit 3 is connected to the water supply pipe 8, and the water supply pipe 8 leads to the mesh belt of the single-freezing machine. The utility model utilizes the pressure of the tap water itself, and the flow of water does not require additional pump pressure, reducing the number of pumps and saving costs.

[0042] The connection structure of the inner tube of the secondary heat exchange unit 4: as Figure 3 shown, the air inlet of the inner tube of the secondary heat exchange unit 4 is connected to the air outlet device 23, and the air outlet of the inner tube of the secondary heat exchange unit 4 is connected to the air supply pipe 9, and the air supply pipe 9 leads to the water tank of the ice-packing machine. The utility model provides power for the flow of the gas through the air outlet device 23.

[0043] Preferably, the air outlet device is an air pump or a fan. In this embodiment, the air outlet device is a vortex air pump, realizing 400 cubic meters of cold air per hour.

[0044] The connection structure of the inner tube of the tertiary heat exchange unit 5: as Figure 3As shown, the antifreeze inlet of the inner pipe of the three-stage heat exchange unit 5 is connected to the liquid outlet of the antifreeze storage tank 10, the antifreeze outlet of the inner pipe of the three-stage heat exchange unit 5 is connected to the liquid inlet of the ice machine water tank evaporator 11, and the liquid outlet of the ice machine water tank evaporator 11 is connected to the liquid inlet of the antifreeze storage tank 10. Usually, there are two ice machine water tank evaporators 11, which are located on both sides of the ice machine water tank. The antifreeze circulates between the antifreeze storage tank 10, the inner pipe of the three-stage heat exchange unit 5, and the ice machine water tank evaporator 11.

[0045] Furthermore, a water pump 22 is provided between the liquid outlet of the antifreeze storage tank 10 and the antifreeze inlet of the inner pipe of the three-stage heat exchange unit 5. The utility model provides power for the flow of the antifreeze through the water pump 22.

[0046] For a larger cold air output, as Figures 1 - 3 shown, two or more second-stage heat exchange units 4 are arranged in parallel. The air inlets of the inner pipes of each second-stage heat exchange unit 4 are connected to the main air inlet pipe 12, and a pressure gauge is provided on the main air inlet pipe 12. The refrigerant channel inlets of each second-stage heat exchange unit 4 are respectively connected to the liquid inlet branch pipes 13, and the liquid inlet branch pipes 13 are connected to the main liquid inlet pipe 14. The inlet of the throttling element 6 is connected to the refrigerant channel outlet of the first-stage heat exchange unit 3, and the outlet is connected to the main liquid inlet pipe 14. At least one liquid inlet branch pipe 13 is provided with a valve 15. When the pressure gauge detects a relatively high pressure (that is, due to the low cold air temperature, the air outlet of the air supply pipe 9 in the water tank is blocked by frozen water, and the air output of the air supply pipe 9 is insufficient), the valve 15 is closed, so that the refrigerant cannot flow into the refrigerant channel of the second-stage heat exchange unit 4 where the valve 15 is located. As a result, the gas in the inner pipe of the second-stage heat exchange unit 4 where the valve 15 is located is not heat-exchanged, that is, the gas temperature does not decrease. The gases in the inner pipes of each second-stage heat exchange unit 4 are mixed in the air supply pipe 9, and the mixed gas has a high temperature, thereby melting the ice and frost at the air outlet of the air supply pipe 9. There is no need for manual defrosting, and the operation is simple and convenient. When the pressure detected by the pressure gauge returns to the normal value, the valve 15 is reopened. In this embodiment, two second-stage heat exchange units 4 are arranged in parallel, and one of the liquid inlet branch pipes 13 is provided with a valve 15.

[0047] To achieve intelligent control, a controller is further included, and the valve 15 and the pressure gauge are electrically connected to the controller respectively.

[0048] Preferably, the valve 15 is a solenoid valve or an electric valve. In this embodiment, the valve 15 is a solenoid valve.

[0049] To save space and reduce the volume of the utility model, as Figure 1 、 2 shown, the first-stage heat exchange unit 3, the second-stage heat exchange unit 4, and the third-stage heat exchange unit 5 are respectively bent into coil pipes, and the compressor 2 is arranged inside the coil pipes.

[0050] In order to increase the heat exchange area and improve the heat exchange effect, the primary heat exchange unit 3, the secondary heat exchange unit 4, and the tertiary heat exchange unit 5 are respectively bent into coils with more than two turns. In this embodiment, the primary heat exchange unit 3 and the tertiary heat exchange unit 5 are respectively bent into coils with three turns, and the secondary heat exchange unit 4 is bent into a coil with two turns.

[0051] For a better heat exchange effect, as Figures 1 - 3 shown, the refrigerant channel inlets of each stage of the heat exchange unit are arranged at the outlet ends of the inner tubes of each stage of the heat exchange unit, and the refrigerant channel outlets of each stage of the heat exchange unit are arranged at the inlet ends of the inner tubes of each stage of the heat exchange unit. The flow direction of the refrigerant is opposite to the flow directions of the gas and liquid in the inner tubes of each stage of the heat exchange unit, forming a counter-flow, and the heat exchange effect is good.

[0052] Furthermore, a first pipeline 16 is connected between the outlet of the liquid storage tank 1 and the inlet of the compressor 2, a second pipeline 17 is connected between the outlet of the compressor 2 and the refrigerant channel inlet of the primary heat exchange unit 3, a third pipeline 18 is connected between the refrigerant channel outlet of the primary heat exchange unit 3 and the inlet of the drying filter 7, the refrigerant channel outlets of each secondary heat exchange unit 4 are respectively connected to a fourth pipeline 19, the fourth pipeline 19 is communicated with the refrigerant channel inlet of the tertiary heat exchange unit 5 through a fifth pipeline 20, and a sixth pipeline 21 is connected between the refrigerant channel outlet of the tertiary heat exchange unit 5 and the inlet of the liquid storage tank 1.

[0053] The above embodiments are only one of the preferred embodiments of the present invention, and do not limit the implementation scope of the present invention. Therefore, all equivalent changes made according to the shape, structure, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A multi-stage casing air cooler, characterized in that: The invention comprises a liquid storage tank (1), a compressor (2), a primary heat exchange unit (3), a secondary heat exchange unit (4) and a tertiary heat exchange unit (5), wherein each of the heat exchange units comprises an inner tube and an outer tube sleeved outside the inner tube, a refrigerant channel for the flow of refrigerant is reserved between the inner tube and the outer tube, and the refrigerant channels of the heat exchange units of each stage are connected in sequence, the outlet of the liquid storage tank (1) is connected to the inlet of the compressor (2), the outlet of the compressor (2) is connected to the inlet of the refrigerant channel of the primary heat exchange unit (3), and the tertiary heat exchange unit (5) is connected to the inlet of the refrigerant channel of the tertiary heat exchange unit (3). The refrigerant channel outlet of the first-stage heat exchange unit (5) is connected to the inlet of the liquid storage tank (1); a throttling element (6) is provided between the refrigerant channel outlet of the first-stage heat exchange unit (3) and the refrigerant channel inlet of the second-stage heat exchange unit (4); one end of the inner tube of the first-stage heat exchange unit (3) is a water inlet and the other end is a water outlet; one end of the inner tube of the second-stage heat exchange unit (4) is an air inlet and the other end is an air outlet; one end of the inner tube of the tertiary heat exchange unit (5) is an antifreeze liquid inlet and the other end is an antifreeze liquid outlet.

2. A multi-stage casing air cooler according to claim 1, characterized in that: A drying filter (7) is provided between the refrigerant channel outlet of the primary heat exchange unit (3) and the throttling element (6).

3. A multi-stage casing air cooler according to claim 1, characterized in that: The water inlet of the inner tube of the primary heat exchange unit (3) is connected to the water outlet of tap water, and the water outlet of the inner tube of the primary heat exchange unit (3) is connected to the water supply pipe (8).

4. The multi-stage casing air cooler according to claim 1, characterized in that: The air inlet of the inner tube of the secondary heat exchange unit (4) is connected to the air outlet device (23), and the air outlet of the inner tube of the secondary heat exchange unit (4) is connected to the air supply pipe (9).

5. The multi-stage casing air cooler according to claim 1, characterized in that: The antifreeze inlet of the inner tube of the three-stage heat exchange unit (5) is connected to the liquid outlet of the antifreeze storage tank (10), the antifreeze outlet of the inner tube of the three-stage heat exchange unit (5) is connected to the liquid inlet of the ice packing machine water tank evaporator (11), and the liquid outlet of the ice packing machine water tank evaporator (11) is connected to the liquid inlet of the antifreeze storage tank (10).

6. The multi-stage casing air cooler according to claim 1, characterized in that: More than two secondary heat exchange units (4) are arranged in parallel, the air inlet of the inner tube of each secondary heat exchange unit (4) is connected to the air inlet main pipe (12), the air inlet main pipe (12) is provided with a pressure gauge, the refrigerant channel inlet of each secondary heat exchange unit (4) is respectively connected to the liquid inlet branch pipe (13), the liquid inlet branch pipe (13) is connected to the liquid inlet main pipe (14), the inlet of the throttling element (6) is connected to the refrigerant channel outlet of the primary heat exchange unit (3), and the outlet is connected to the liquid inlet main pipe (14), and at least one liquid inlet branch pipe (13) is provided with a valve (15).

7. A multi-stage casing air cooler according to claim 6, characterized in that: It also includes a controller, and the valve (15) and the pressure gauge are electrically connected to the controller respectively.

8. The multi-stage casing air cooler according to claim 1, characterized in that: The primary heat exchange unit (3), the secondary heat exchange unit (4) and the tertiary heat exchange unit (5) are respectively bent into coils, and the compressor (2) is arranged inside the coils.

9. The multi-stage casing air cooler according to claim 1, characterized in that: The refrigerant channel inlet of each stage of the heat exchange unit is arranged at the outlet end of the inner tube of each stage of the heat exchange unit, and the refrigerant channel outlet of each stage of the heat exchange unit is arranged at the inlet end of the inner tube of each stage of the heat exchange unit.

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