Freezing device for defrosting in batches

Abstract

The utility model provides a freezing device for defrosting in batches. The freezing device comprises a plurality of evaporators, a hot gas defrosting module for defrosting the evaporators and a water defrosting module for performing water defrosting on the evaporators, the water defrosting module can wash each evaporator independently, a defrosting switch is arranged between each evaporator and the water defrosting module, and a defrosting switch is arranged between each evaporator and the hot air defrosting module for independent connection. When a certain evaporator needs to be defrosted, the defrosting switch and the defrosting switch which are connected with the evaporator are sequentially turned on. The hot gas defrosting module can conduct hot gas defrosting on the evaporators and is independently connected with the multiple evaporators, independent hot gas defrosting operation can be conducted on the evaporators needing to be defrosted, the equipment does not need to be completely shut down, energy is saved, and efficiency is improved. And after hot gas defrosting is finished, the water defrosting module carries out defrosting operation on the evaporator, floating frost remaining on the evaporator is washed away, and the subsequent defrosting frequency is reduced.

Description

Technical Field

[0001] The utility model relates to the field of quick freezers, and is particularly suitable for a batch defrosting freezing device. Background Art

[0002] At present, in order to store products for a longer time, products are quickly frozen on the market, and the machine for quick freezing is a freezing device. Some products on the market are seasonal and need to be produced continuously in large quantities. Some products have special processing techniques, such as fried products, which also need to be produced in large quantities. The quick freezing of large quantities of products requires the freezing device to run for a long time. If the freezing device runs too long, it will cause frost on the evaporator, thus affecting the freezing effect. The commonly used defrosting method now is to shut down the entire equipment for defrosting, and restarting after shutdown will increase energy consumption. At the same time, the product cannot be quickly frozen during shutdown, affecting efficiency. Therefore, there is an urgent need for a device that can defrost without shutting down. Summary of the invention

[0003] The utility model aims to solve the above problems and provides a freezing device for batch defrosting.

[0004] In order to achieve the above-mentioned purpose of the utility model, the utility model provides a batch defrosting freezing device, including a plurality of evaporators, a hot air defrost module for defrosting the evaporators, and a water defrost module for defrosting the evaporators with water; the water defrost module can flush each of the evaporators separately, a defrost switch is provided between each of the evaporators and the water defrost module, and a defrost switch is provided between each of the evaporators and the hot air defrost module and is separately connected; when it is necessary to defrost a certain evaporator, the defrost switch and the defrost switch connected to it are turned on in sequence.

[0005] More specifically, a windshield plate is arranged between two adjacent evaporators.

[0006] More specifically, the water defrosting module includes a water tank, a water pump connected to the water tank, a plurality of flushing pipes for flushing the outer surface of the evaporator, and a drain pipe for discharging water, each of the flushing pipes flushes an evaporator separately, and the defrosting switch is arranged on each of the flushing pipes.

[0007] More specifically, a temperature sensor for detecting water temperature is arranged in the water tank.

[0008] More specifically, a liquid level sensor for detecting the liquid level is arranged in the water tank.

[0009] More specifically, the water tank is provided with a steam pipeline for increasing the water temperature and a water supply pipeline for increasing the water volume.

[0010] More specifically, the hot air defrost module includes an air supply pipeline and an air return pipeline; hot air enters the evaporator from the air supply pipeline and flows out through the air return pipeline after defrosting.

[0011] More specifically, the gas supply pipeline is provided with a gas supply solenoid valve for opening and closing the gas supply pipeline.

[0012] More specifically, a return air pneumatic valve for opening and closing the return air pipeline is provided on the return air pipeline.

[0013] More specifically, a camera for observing the frost layer is provided at the evaporator.

[0014] The utility model mainly designs a batch defrosting freezing device, and sets a hot air defrosting module to perform hot air defrosting on the evaporator, and is separately connected to a plurality of evaporators, so that a separate hot air defrosting operation can be performed on the evaporator that needs to be defrosted, without the need to bend and shut down the equipment, thus saving energy and improving efficiency. After the hot air defrosting is completed, the water defrosting module performs a defrosting operation on the evaporator to clean the floating frost remaining on the evaporator, so that there is no floating frost on the surface of the evaporator, thereby reducing the number of defrosting times. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the embodiments described below are only used to explain the present application but not to limit the scope of the present application. In the attached drawings:

[0016] Figure 1 It is a main structural schematic diagram of the utility model;

[0017] Figure 2 It is a schematic diagram of the top view structure of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the water defrosting module of the utility model;

[0020] Figure 5 This is a schematic diagram of the hot air defrosting module structure of the utility model;

[0021] In the figure: 11. Conveying assembly; 12. Precooling section; 13. Quick freezing section; 2. Evaporator; 21. Evaporator fan; 22. Wind shield plate; 31. Liquid supply pipeline; 311. Liquid supply solenoid valve; 312. One-way valve; 32. Air supply pipeline; 321. Air supply solenoid valve; 33. First return air pipeline; 331. Return air pneumatic valve; 34. Second return air pipeline; 41. Water tank; 42. Water pump; 43. Flush main pipe; 44. Flush pipe; 45. Drain pipe; 46. Steam pipeline; 47. Water supply pipeline; 5. Camera; →: Water flow direction. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the implementation of the utility model clearer, the technical scheme in the embodiment of the utility model will be described in more detail below in conjunction with the drawings in the embodiment of the utility model. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described embodiments are part of the embodiments of the utility model, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the utility model, and should not be understood as limitations on the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0023] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present utility model. The embodiments of the present utility model are described in detail below in conjunction with the drawings.

[0024] It should be understood that the drawings are only used to illustrate the present application.

[0025] A batch defrosting freezing device, such as Figure 1-Figure 5As shown, it includes a plurality of evaporators 2, a hot air defrosting module for defrosting the evaporator 2, and a water defrosting module for water defrosting the evaporator 2; the freezing device is divided into a precooling section 12 and a quick freezing section 13, the conveying component 11 conveys the product first through the precooling section 12, and then into the quick freezing section 13, the precooling section 12 and the quick freezing section 13 are both provided with evaporators 2, the evaporator 2 arranged in the precooling section 12 can control the temperature of the product entering the precooling section 12 to about 12°C, and the evaporator 2 arranged in the quick freezing section 13 will enter The products in the quick-freezing section 13 are frozen rapidly, so the frost formation speed of the evaporator 2 arranged in the quick-freezing section 13 is faster than that of the evaporator 2 in the pre-cooling section 12. Therefore, the hot air defrost module and the water defrost module in the present scheme are mainly used to perform defrost operations on the evaporator 2 arranged in the quick-freezing section 13, and can also perform defrost operations on the evaporator 2 in the pre-cooling section 12. The connection method between the hot air defrost module and the evaporator 2 in the quick-freezing section 13 and the connection method between the water defrost module and the evaporator 2 in the quick-freezing section 13 in the present scheme are both applicable to the pre-cooling section 12.

[0026] like Figure 5 As shown, the hot air defrost module includes an air supply pipeline 32 and an air return pipeline, but in order to reduce the manufacturing cost and floor space, the liquid supply pipeline 31 required when the evaporator 2 is in normal refrigeration is arranged together with the hot air defrost module. The liquid inlet end of the liquid supply pipeline 31 passes through the refrigerant liquid, and the liquid outlet end is connected to the evaporator 2, and the refrigerant liquid flows into the evaporator 2 through the liquid supply pipeline 31; the air inlet end of the air supply pipeline 32 passes through hot air, and the air outlet end is connected to the evaporator 2, and the hot air flows into the evaporator 2 through the air supply pipeline 32; the air inlet end of the return air pipeline passes through the return air in the evaporator 2, and the air outlet end is connected to the gas-liquid separator, and the return air generated in the evaporator 2 enters the gas-liquid separator through the return air pipeline, and the separated gas enters the compressor. When the hot air defrost module is in normal refrigeration, the liquid supply pipeline 31 and the return air pipeline are in circulation; when the hot air defrost module is defrosting, the air supply pipeline 32 and the return air pipeline are in circulation.

[0027] The liquid supply pipeline 31 is provided with a liquid supply solenoid valve 311 and a one-way valve 312 , the air supply pipeline 32 is provided with an air supply solenoid valve 321 , and the air return pipeline is provided with an air return pneumatic valve 331 . The return air pipeline includes a first return air pipeline 33 and a second return air pipeline 34, and a return air pneumatic valve 331 is arranged on the first return air pipeline 33; the air inlet end of the second return air pipeline 34 is connected to the liquid supply pipeline 31, and the air outlet end is connected to the first return air pipeline 33, the air inlet end of the second return air pipeline 34 is arranged between the liquid outlet of the liquid supply pipeline 31 and the one-way valve 312, and the air outlet end of the second return air pipeline 34 is arranged between the air outlet end of the first return air pipeline 33 and the return air pneumatic valve 331, that is, the air inlet end of the second return air pipeline 34 is the liquid outlet end of the liquid supply pipeline 31, and the air outlet end of the second return air pipeline 34 is the air outlet end of the first return air pipeline 33.

[0028] During normal refrigeration, the liquid supply solenoid valve 311 disposed on the liquid supply pipeline 31 is opened, the return air pneumatic valve 331 disposed on the return air pipeline is opened, and the air supply solenoid valve 321 disposed on the air supply pipeline 32 is closed. The refrigerant liquid enters the liquid supply pipeline 31 from the liquid inlet end of the liquid supply pipeline 31. Since the liquid supply solenoid valve 311 arranged on the liquid supply pipeline 31 is in an open state, the refrigerant liquid can flow in the liquid supply pipeline 31 and enter the evaporator 2 through the liquid outlet end of the liquid supply pipeline 31. After being vaporized in the evaporator 2, it flows to the first return gas pipeline 33. The return gas of the evaporator 2 enters the first return gas pipeline 33 through the air inlet end of the first return gas pipeline 33. Since the return gas pneumatic valve 331 arranged on the first return gas pipeline 33 is in an open state, the return gas of the evaporator 2 can flow normally in the first return gas pipeline 33 and enter the gas-liquid separator through the air outlet end of the first return gas pipeline 33. The gas after gas-liquid separation enters the compressor again.

[0029] When defrosting is required, the air supply solenoid valve 321 arranged on the air return pipeline is opened, the air return pneumatic valve 331 arranged on the first air return pipeline 33 is closed, and the liquid supply solenoid valve 311 arranged on the liquid supply pipeline 31 is closed. The hot air enters the air supply pipeline 32 from the air inlet end of the air supply pipeline 32. Since the air supply solenoid valve 321 arranged on the air supply pipeline 32 is in an open state, the hot air can flow in the air supply pipeline 32 and enter the evaporator 2 through the air outlet end of the air supply pipeline 32. After the hot air defrosts in the evaporator 2, it flows to the second return air pipeline 34. The return air from the evaporator 2 enters the second return air pipeline 34 from the air inlet end of the second return air pipeline 34, that is, it enters the second return air pipeline 34 from the liquid outlet end of the liquid supply pipeline 31. Since a one-way valve 312 is arranged on the liquid supply pipeline 31, the return air from the evaporator 2 will definitely enter the second return air pipeline 34. Since the second return air pipeline 34 is a passage, the return air from the evaporator 2 enters the gas-liquid separator from the air outlet end of the second return air pipeline 34, that is, it enters the gas-liquid separator from the air outlet end of the first return air pipeline 33. The gas after gas-liquid separation enters the compressor again.

[0030] To facilitate the zoned defrosting of several evaporators 2, a defrost switch is separately connected between each of the evaporators 2 and the hot air defrost module. Therefore, several air supply branches are set at the air outlet end of the air supply pipeline 32, and each air supply branch is connected to an evaporator 2. A defrost switch is set on each air supply branch to defrost a certain evaporator 2 as needed. For example, the first evaporator 2 is connected to the first air supply branch, and a first defrost switch is set on the first air supply branch; the second evaporator 2 is connected to the second air supply branch, and a second defrost switch is set on the second air supply branch, and they are arranged in sequence. When the first evaporator 2 needs to be defrosted, the first defrost switch is turned on, and the other defrost switches remain closed. At this time, hot air enters the first air supply branch from the air supply pipeline 32 to defrost the first evaporator 2, and the return air of the defrosted evaporator 2 flows to the second return air pipeline 34; when the second evaporator 2 needs to be defrosted, the second defrost switch is turned on, and the other defrost switches remain closed. At this time, hot air enters the second air supply branch from the air supply pipeline 32 to defrost the second evaporator 2, and the return air of the defrosted evaporator 2 flows to the second return air pipeline 34; when other evaporators 2 are defrosted with hot air, the method is the same as above and will not be repeated.

[0031] like Figure 3 , Figure 4As shown, the water defrosting module includes a water tank 41, a water pump 42 connected to the water tank 41, a plurality of flushing pipes 44 for flushing the outer surface of the evaporator 2, and a drainage pipe 45 for discharging water. A flushing main pipe 43 is arranged between the water pump 42 and the plurality of flushing pipes 44 to facilitate the control of water outlet. The water inlet end of the flushing main pipe 43 is connected to the water pump 42, and the water outlet end is connected to the water inlet ends of the plurality of flushing pipes 44. Each of the flushing pipes 44 flushes one evaporator 2 separately, and the defrosting switch is arranged on each of the flushing pipes 44.

[0032] A defrost switch is provided between each of the evaporators 2 and the water defrost module, so as to facilitate the evaporator 2 to defrost in different zones. For example, the first evaporator 2 is connected to the first flushing pipe 44, and a first defrost switch is set on the first flushing pipe 44; the second evaporator 2 is connected to the second flushing pipe 44, and a second defrost switch is set on the second flushing pipe 44, and they are arranged in sequence. When the first evaporator 2 needs to defrost, the first defrost switch is controlled to be turned on, and the other defrost switches are turned off. At this time, the water pump 42 pumps water from the water tank 41 and sends it into the first flushing pipe 44. The first flushing pipe 44 flushes the frost layer remaining on the outer surface of the first evaporator 2, flushes the frost layer away, and discharges it through the drain pipe 45. When the second evaporator 2 needs to defrost, the second defrost switch is controlled to be turned on, and the other defrost switches are turned off. At this time, the water pump 42 pumps water from the water tank 41 and sends it into the second flushing pipe 44. The second flushing pipe 44 flushes the frost layer remaining on the outer surface of the second evaporator 2, flushes the frost layer away, and discharges it through the drain pipe 45. When the other evaporators 2 are defrosted with water, the method is consistent with the above and will not be repeated.

[0033] The defrost switch and defrost switch can be set to any structure that can make water flow normally in the pipeline or prevent it from flowing. In this solution, the defrost switch and defrost switch are both set to solenoid valves.

[0034] To ensure that the frost layer is well cleared, in this solution, the water temperature for defrosting is controlled at about 25°C, so it is necessary to monitor the water temperature in the water tank 41. Therefore, a temperature sensor for detecting the water temperature is provided in the water tank 41, and a steam pipeline 46 is provided on the water tank 41. When the temperature sensor detects that the water temperature in the water tank 41 is lower than 25°C, high-temperature steam is introduced into the water tank 41 through the steam pipeline 46 to heat the water and keep it at about 25°C.

[0035] To ensure that there is enough water for defrosting, a liquid level sensor for detecting the liquid level is provided in the water tank 41, and a water replenishment channel is provided on the water tank 41. When the liquid level sensor detects that there is insufficient water in the water tank 41, water is passed into the water tank 41 through the water replenishment channel to ensure sufficient water.

[0036] In order to prevent the hot air from defrosting from blowing onto the product and affecting other evaporators 2 during defrosting, a windshield door plate 22 is provided between two adjacent evaporators 2 .

[0037] A camera 5 is arranged at the evaporator 2 in the freezing device, and the evaporator 2 that needs to be defrosted is observed through the camera 5 .

[0038] When the evaporator 2 is defrosted, the evaporator 2 that is defrosted is shut down, and the fan of the corresponding evaporator 2 also stops running until the defrosting is completed and normal operation begins.

[0039] The specific defrosting process of the freezing device is as follows:

[0040] The camera 5 observes that a certain evaporator 2 needs to be defrosted, operates the corresponding evaporator 2 and the evaporator 2 fan to stop running, and then operates the defrost switch and defrost switch connected to the corresponding evaporator 2 to open in sequence; when the corresponding defrost switch and defrost switch are turned on, the other defrost switches and defrost switches remain closed, and hot air is input into the air supply pipeline 32. Since the corresponding defrost switch has been turned on, the hot air will smoothly enter the corresponding evaporator 2 for hot air defrosting. The hot air passing through the evaporator 2 will enter the gas-liquid separator through the second return air pipeline. After the gas and liquid are separated, the gas enters the compressor again; hot air defrosting is performed for different times according to the thickness of the frost layer. When the frost layer floats on the surface of the evaporator 2, the water pump 42 runs to transport warm water to the flushing pipe 44, and the warm water impacts the surface of the evaporator 2 until the floating frost is completely flushed away, and the water flows out through the drain pipe 45; after the defrosting is completed, after standing for a certain period of time, the normal working process is entered.

[0041] The utility model mainly designs a batch defrosting freezing device, and sets a hot air defrosting module to perform hot air defrosting on the evaporator 2, and is separately connected to a number of evaporators 2, so that a separate hot air defrosting operation can be performed on the evaporator 2 that needs to be defrosted, without the need to bend and shut down the equipment, thus saving energy and improving efficiency. After the hot air defrosting is completed, the water defrosting module performs a defrosting operation on the evaporator 2 to rinse the floating frost still remaining on the evaporator 2, so that there is no floating frost on the surface of the evaporator 2, thereby reducing the number of defrosting times. A temperature sensor is set in the water tank 41 to ensure the water temperature, and a liquid level sensor is set to ensure the water volume.

[0042] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention.

[0043] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present utility model will not further describe various possible combinations.

[0044] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A batch defrosting freezing device, characterized in that: The invention comprises a plurality of evaporators (2), a hot air defrost module for defrosting the evaporators (2), and a water defrost module for defrosting the evaporators (2); the water defrost module can flush each evaporator (2) separately, a defrost switch is provided between each evaporator (2) and the water defrost module, and a defrost switch is provided between each evaporator (2) and the hot air defrost module for separate connection; when it is necessary to defrost a certain evaporator (2), the defrost switch and the defrost switch connected thereto are turned on in sequence.

2. The batch defrosting freezing device according to claim 1, characterized in that: A windshield door plate (22) is arranged between two adjacent evaporators (2).

3. The batch defrosting freezing device according to claim 1, characterized in that: The water defrosting module comprises a water tank (41), a water pump (42) connected to the water tank (41), a plurality of flushing pipes (44) for flushing the outer surface of the evaporator (2), and a drain pipe (45) for draining water, each of the flushing pipes (44) flushes an evaporator (2) separately, and the defrosting switch is arranged on each of the flushing pipes (44).

4. The batch defrosting freezing device according to claim 3, characterized in that: A temperature sensor for detecting water temperature is arranged in the water tank (41).

5. The batch defrosting freezing device according to claim 3, characterized in that: A liquid level sensor for detecting the liquid level is arranged in the water tank (41).

6. The batch defrosting freezing device according to claim 3, characterized in that: The water tank (41) is provided with a steam pipeline (46) for increasing the water temperature and a water replenishment pipeline (47) for increasing the water volume.

7. The batch defrosting freezing device according to claim 1, characterized in that: The hot air defrosting module comprises an air supply pipeline (32) and an air return pipeline; hot air enters the evaporator (2) from the air supply pipeline (32) and flows out through the air return pipeline after defrosting.

8. The batch defrosting freezing device according to claim 7, characterized in that: The air supply pipeline (32) is provided with an air supply solenoid valve (321) for opening and closing the air supply pipeline (32).

9. The batch defrosting freezing device according to claim 7, characterized in that: The air return pipeline is provided with an air return pneumatic valve (331) for opening and closing the air return pipeline.

10. The batch defrosting freezing device according to claim 1, characterized in that: A camera (5) for observing the frost layer is arranged at the evaporator.

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