High-efficient and fast pear freezing device

Abstract

The application relates to a high-efficiency and rapid frozen pear production device, which comprises an energy supply system, a frozen pear freezing and thawing system, a phase change waste heat recovery system and an automatic control system. The energy supply system is connected with the frozen pear freezing and thawing system through a cold air fan; the frozen pear freezing and thawing system is connected with the phase change waste heat recovery system through a second throttling valve and a first variable frequency water pump; the phase change waste heat recovery system is connected with the energy supply system through a condenser; and the automatic control system is connected with the energy supply system, the frozen pear freezing and thawing system and the phase change waste heat recovery system in parallel. The frozen pear freezing and thawing can be completed in the same device, and time and energy can be effectively saved.

Description

Technical Field

[0001] This invention relates to a frozen pear production device, specifically a high-efficiency, rapid frozen pear production device, belonging to the field of freezing and thawing technology. Background Technology

[0002] Frozen pears, also known as frozen autumn pears, are generally made from various varieties of pears, including the Huagai pear, Qiubai pear, Bai pear, and Jianba pear. Frozen pears are rich in vitamins A and B, including vitamins B1 (sulfatine), B2 (riboflavin), and B3 (niacin), as well as vitamins C and E. They also contain various trace elements such as iron, magnesium, and zinc, which help maintain metabolic balance. Frozen pears have the effects of quenching thirst, moisturizing the lungs, and relieving irritability. Eating frozen pears in winter can help alleviate dryness and maintain good health. With increasing public awareness of health issues, the demand for fresh and convenient fruits is rising. Frozen pears, as a healthy frozen fruit option, effectively meet this demand. Therefore, the frozen pear market is showing a stable and upward trend.

[0003] In traditional frozen pear production, air cooling is typically used, with freezing temperatures set between -15°C and -10°C for 24 to 48 hours. Thawing then occurs in a water-cooled environment at 3°C ​​to 5°C, maintaining a relative humidity of approximately 90%, for another 24 to 48 hours. This freezing and thawing process is repeated approximately four times. The key feature of equipment for producing frozen pears is its design that separates the freezing and thawing processes.

[0004] The aforementioned traditional methods for producing frozen pears have several drawbacks. From an energy efficiency perspective, they require both cold and heat, resulting in significant energy waste. From a time perspective, equipment needs to be moved multiple times, and manual operation is time-consuming, making the overall process both time-consuming and labor-intensive. From a spatial layout and investment perspective, two sets of equipment are required, leading to a relatively large footprint and high initial investment. From a temperature and humidity control perspective, the thawing process in traditional frozen pear production exhibits a degree of arbitrariness, and the temperature and humidity control during thawing and freezing is not very precise. Summary of the Invention

[0005] The purpose of this invention is to provide an efficient and rapid frozen pear production device to solve the above-mentioned problems. It enables efficient energy utilization, allows the freezing and thawing processes of frozen pears to be completed in the same equipment, saving time, with low initial investment, a small equipment footprint, and precise temperature and humidity control.

[0006] The present invention achieves the above objectives through the following technical solution: a high-efficiency and rapid frozen pear production device, comprising an energy supply system, a frozen pear freezing and thawing system, a phase change waste heat recovery system, and an automatic control system. The energy supply system is connected to the frozen pear freezing and thawing system, and the frozen pear freezing and thawing system is connected to the phase change waste heat recovery system, which is connected to the energy supply system. The automatic control system is connected in parallel with the energy supply system, the frozen pear freezing and thawing system, and the phase change waste heat recovery system.

[0007] The energy supply system includes a variable frequency compressor, a condenser, an electronic expansion valve, and a cooler, which are connected in series to form a closed-loop system.

[0008] The frozen pear freezing and thawing system includes a cooler, a base, shelves, an ultrasonic transducer, an electric actuator, a first throttling valve, a processing chamber, a first temperature sensor, a humidity sensor, and a water level sensor. The processing chamber contains multiple components, such as the cooler, base, shelves, ultrasonic transducer, electric actuator, first throttling valve, first temperature sensor, humidity sensor, and water level sensor. The base is located above the first throttling valve, the ultrasonic transducer is mounted on the base, the shelves are located on the upper part of the base, and the electric actuator is located at the bottom of the shelves.

[0009] The phase change waste heat recovery system includes a second throttle valve, a first variable frequency water pump, a dynamic energy storage device, a phase change energy storage material, tap water, a third throttle valve, a second variable frequency water pump, a second temperature sensor, and a condenser. The phase change energy storage material is inside the dynamic energy storage device, and the third throttle valve is located above the tap water.

[0010] The automatic control system employs a Newton-Raphson optimization algorithm to control the electronic expansion valve, variable frequency compressor, second throttle valve, first variable frequency water pump, third throttle valve, second variable frequency water pump, and the working status of the treatment tank.

[0011] The energy supply system is connected to the frozen pear freezing and thawing system via a cooler; the frozen pear freezing and thawing system is connected to the phase change waste heat recovery system via a third throttle valve and a first water pump; the phase change waste heat recovery system is connected to the energy supply system via a condenser. The automatic control system is connected in parallel with the energy supply system, the frozen pear freezing and thawing system, and the phase change waste heat recovery system.

[0012] The ultrasonic transducer introduces ultrasonic transducers during the thawing process of frozen pears, accelerating the thawing process and significantly improving the production efficiency of frozen pears.

[0013] The processing box is suitable for both freezing and thawing frozen pears, effectively reducing the floor space required and achieving economical and efficient use of the equipment.

[0014] The electric device raises the shelf when the frozen pears are thawing, which increases the thawing speed, shortens the entire thawing cycle, and improves production efficiency.

[0015] The first temperature sensor precisely controls the temperature inside the processing chamber, ensuring freezing and thawing are carried out within a suitable temperature range, thus preventing uneven temperature distribution that could affect the quality of the frozen pears. The humidity sensor maintains a suitable humidity environment, helping to preserve the texture of the frozen pears. The water level sensor enables automated control, improving work efficiency and accurately monitoring the water level inside the chamber, ensuring the quality of the frozen pears.

[0016] The dynamic energy storage device is connected to a condenser. Heat absorbed by the condenser is transferred to the dynamic energy storage device, causing the material to change from a solid to a liquid state, thus effectively storing heat. During the thawing process of frozen pears, the phase change energy storage material continuously releases its stored heat, which is then transferred to the processing chamber through a first throttling valve until the temperature in the dynamic energy storage device decreases to a solid state. The selection of a phase change energy storage material enables relative temperature stability, exhibits good flexibility, and helps reduce operating costs and extend equipment lifespan.

[0017] The dynamic energy storage device is filled with water that meets drinking standards and has a very high purity. This water undergoes strict purification treatment to ensure that its quality reaches a level that is safe to drink.

[0018] The introduced tap water is used to balance the excess heat from the dynamic energy storage device. The external tap water is recycled and will not cause waste of resources.

[0019] The automatic control system employs the Newton-Raphson optimization algorithm to control the temperature and humidity in the processing tank, the variable frequency compressor and electronic expansion valve in the energy supply system, and the first variable frequency water pump in the phase change waste heat recovery system.

[0020] The beneficial effects of this invention are:

[0021] (1) The present invention can realize the freezing and thawing process of frozen pears in the same device, with complete functions, saving time in the production of frozen pears, and the equipment occupies a small area;

[0022] (2) In this invention, when frozen pears are thawed, the shelf is raised by an electric device, which ensures that the frozen pears are always in a completely consistent environmental condition during the thawing process, thereby achieving uniformity in the thawing process.

[0023] (3) The automatic control system of this invention uses the Newton-Raphson optimization algorithm to achieve precise control of temperature and humidity inside the processing chamber, while adjusting the variable frequency compressor in the energy supply system and the first and second variable frequency water pumps in the phase change waste heat recovery system, thereby achieving the purpose of automated control. This system significantly reduces the difficulty of temperature and humidity control during the thawing and freezing processes in traditional frozen pear processing;

[0024] (4) The ultrasonic transducer in the treatment box during the thawing of frozen pears can accelerate the flow of water and the transfer of heat in the treatment box, thereby improving the efficiency of thawing frozen pears. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure and connection of the present invention.

[0026] In the diagram: 1—Variable frequency compressor, 2—Condenser, 3—Electronic expansion valve, 4—Air cooler, 5—Base, 6—Shelf, 7—Ultrasonic transducer, 8—Electrical actuator, 9—First throttle valve, 10—Processing tank, 11—Second throttle valve, 12—First variable frequency water pump, 13—Dynamic energy storage device, 14—Second variable frequency water pump, 15

[0027] —Phase change energy storage material, 16—Tap water, 17—First temperature sensor, 18—Humidity sensor, 19—Water level sensor, 20—Third throttle valve, 21—Second temperature sensor Detailed Implementation

[0028] The present invention will be further explained and described below with reference to the accompanying drawings. However, the specific embodiments described below are only part of the content of the present invention, and not all of it. Based on the embodiments described in the present invention, all other related embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0029] This invention allows freezing and thawing of frozen pears to be carried out in the same device.

[0030] Please see Figure 1 As shown, a high-efficiency, rapid frozen pear production device includes an energy supply system, a frozen pear freezing and thawing system, a phase change waste heat recovery system, and an automatic control system. The energy supply system is connected to the frozen pear freezing and thawing system, which is connected to the phase change waste heat recovery system, which is connected to the energy supply system. The automatic control system is connected in parallel with the energy supply system, the frozen pear freezing and thawing system, and the phase change waste heat recovery system.

[0031] The energy supply system includes a variable frequency compressor 1, a condenser 2, an electronic expansion valve 3, and a cooler 4, which are connected in series to form a closed-loop system.

[0032] The frozen pear freezing and thawing system includes a cooler 4, a base 5, a shelf 6, an ultrasonic transducer 7, an electric actuator 8, a first throttle valve 9, a processing box 10, a first temperature sensor 17, a humidity sensor 18, and a water level sensor 19. The processing box 10 contains multiple components, such as the cooler 4, base 5, shelf 6, ultrasonic transducer 7, electric actuator 8, first throttle valve 9, first temperature sensor 17, humidity sensor 18, and water level sensor 19. The base 5 is located above the first throttle valve 9, the ultrasonic transducer 7 is mounted on the base 5, the shelf 6 is located on the upper part of the base 5, and the electric actuator 8 is located at the bottom of the shelf 6.

[0033] The phase change waste heat recovery system includes a second throttle valve 11, a first variable frequency water pump 12, a dynamic energy storage device 13, a phase change energy storage material 15, tap water 16, a third throttle valve 20, a second variable frequency water pump 14, and a condenser 2. The phase change energy storage material 15 is inside the dynamic energy storage device 13, and the third throttle valve 20 is located above the tap water 16.

[0034] Working process and principle:

[0035] During the freezing process, the variable frequency compressor 1, condenser 2, electronic expansion valve 3, air cooler 4, and second variable frequency water pump 14 are activated, and the frozen pears are placed on shelf 6. Air cooling is used for freezing; the air cooler transfers cold air directly to the frozen pears. With the temperature maintained between -15℃ and -10℃, the frozen pears are frozen within 24 to 48 hours. After freezing, the system shuts down the variable frequency compressor 1, condenser 2, electronic expansion valve 3, air cooler 4, and second variable frequency water pump 14. During the freezing process, the automatic control system regulates the frequency of the variable frequency compressor 1, the opening status of the electronic expansion valve 3, and the frequency of the second variable frequency water pump 14. Simultaneously, the heat within the processing chamber 10 is transferred through the condenser 2 and stored in the phase change energy storage material 15, causing the phase change energy storage material 15 to change from a solid to a liquid state.

[0036] After the frozen pears are frozen, the thawing mode is activated. First, the electric actuator 8 rises, the second variable frequency water pump 14 stops working, and the first variable frequency water pump 12 starts operating. At this time, the heat stored in the phase change energy storage material 15 is released into the processing chamber 10 through the first throttle valve 9, and the temperature inside the processing chamber is monitored by the automatic control system. The automatic control system adjusts the first variable frequency water pump 12 to ensure that the temperature in the processing chamber 10 is maintained between 3°C and 5°C, and the relative humidity is maintained at approximately 90%. The thawing process lasts for 24 to 48 hours, after which the first variable frequency water pump 12 is turned off. The entire freezing and thawing process is repeated approximately four times. During this process, the ultrasonic transducer 7 vibrates to accelerate the thawing of the frozen pears.

[0037] To ensure the device reaches thermal equilibrium during heat absorption and release, a second temperature sensor 21 is designed to monitor the device's temperature changes in real time. After the freezing and thawing process of the frozen pears is completed, if excessive heat is detected in the dynamic energy storage device 13, the automatic control system will adjust the third throttle valve 20 to introduce tap water 16 to regulate and balance the excess heat.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-efficiency, rapid frozen pear production device, characterized in that, It includes an energy supply system, a frozen pear freezing and thawing system, a phase change waste heat recovery system, and an automatic control system; the energy supply system is connected to the frozen pear freezing and thawing system, the frozen pear freezing and thawing system is connected to the phase change waste heat recovery system, the phase change waste heat recovery system is connected to the energy supply system, and the automatic control system is connected in parallel with the energy supply system, the frozen pear freezing and thawing system, and the phase change waste heat recovery system. The energy supply system includes a variable frequency compressor (1), a condenser (2), an electronic expansion valve (3), and a cooler (4), which are connected in series to form a closed-loop system. The frozen pear freezing and thawing system includes a cold air blower (4), a base (5), a shelf (6), an ultrasonic transducer (7), an electric device (8), a first throttle valve (9), a processing box (10), a first temperature sensor (17), a humidity sensor (18), and a water level sensor (19). The processing box (10) contains multiple components: the cold air blower (4), the base (5), the shelf (6), the ultrasonic transducer (7), the electric device (8), the first throttle valve (9), the first temperature sensor (17), the humidity sensor (18), and the water level sensor (19). The base (5) is located above the first throttle valve (9), the ultrasonic transducer (7) is installed on the base (5), the shelf (6) is located on the upper part of the base (5), and the electric device (8) is located at the bottom of the shelf (6). The phase change waste heat recovery system includes a second throttle valve (11), a first variable frequency water pump (12), a dynamic energy storage device (13), a phase change energy storage material (15), tap water (16), a third throttle valve (20), a second variable frequency water pump (14), a second temperature sensor (21), and a condenser (2). The phase change energy storage material (15) is inside the dynamic energy storage device (13), and the third throttle valve (20) is located above the tap water (16). The automatic control system uses the Newton-Raphson optimization algorithm to control the working status of the electronic expansion valve (3), the variable frequency compressor (1), the second throttle valve (11), the first variable frequency water pump (12), the third throttle valve (20), the second variable frequency water pump (14), and the processing tank (10).

2. The efficient and rapid frozen pear production device according to claim 1, characterized in that, The energy supply system is connected to the frozen pear freezing and thawing system via a cold air blower (4); the frozen pear freezing and thawing system is connected to the phase change waste heat recovery system via a second throttle valve (11) and a first variable frequency water pump (12); the phase change waste heat recovery system is connected to the energy supply system via a condenser (2); the automatic control system is connected in parallel with the energy supply system, the frozen pear freezing and thawing system, and the phase change waste heat recovery system.

3. The efficient and rapid frozen pear production device according to claim 1, characterized in that, The ultrasonic transducer (7) introduces an ultrasonic transducer during the thawing process of frozen pears to accelerate the thawing process.

4. The efficient and rapid frozen pear production device according to claim 1, characterized in that, The processing box (10) is suitable for both freezing and thawing of frozen pears, effectively reducing the floor space required.

5. The efficient and rapid frozen pear production device according to claim 1, characterized in that, During the thawing process of frozen pears, the shelf (6) is raised by the automatic device (8) and thawed by water cooling, thereby effectively shortening the time required for thawing.

6. The efficient and rapid frozen pear production device according to claim 1, characterized in that, The first temperature sensor (17) precisely controls the temperature inside the processing chamber, ensuring that freezing and thawing are carried out within a suitable temperature range, avoiding excessively high or low temperatures that could affect the quality of the frozen pears. The humidity sensor (18) maintains a suitable humidity environment, which helps preserve the taste of the frozen pears. The water level sensor (19) can monitor the water level in real time. When the water level exceeds the preset value, it can issue an alarm in time to remind relevant personnel to take measures to prevent accidents from occurring.

7. The efficient and rapid frozen pear production device according to claim 1, characterized in that, In the dynamic energy storage device (13), apart from the phase change energy storage material (15), the rest of the internal filling material is water that meets the drinking standards and has extremely high purity. This water has undergone strict purification treatment to ensure that its quality reaches the level that is safe to drink.

8. The efficient and rapid frozen pear production device according to claim 1, characterized in that, Phase change energy storage material (15) is selected. When frozen pears are frozen, the air cooler (4) freezes the pears, absorbs their heat, and transfers it to the condenser (2). The condenser (2) then transfers this heat to the phase change energy storage material (15), causing the material to change from a solid state to a liquid state, thereby effectively storing heat. During the thawing process of the frozen pears, the phase change energy storage material (15) continuously releases the stored heat, and then transfers the heat to the processing tank (10) through the first throttle valve (9) until the temperature in the dynamic energy storage device decreases and it becomes solid. Phase change energy storage material has the advantages of high heat density, good energy storage effect, and recyclability.

9. The efficient and rapid frozen pear production device according to claim 1, characterized in that, The introduced tap water (16) is used to balance the excess heat from the dynamic energy storage device (13).

10. The efficient and rapid frozen pear production device according to claim 1, characterized in that, In the automatic control system, the Newton-Raphson optimization algorithm is applied to the precise control of the electronic expansion valve (3), the variable frequency compressor (1), the second throttle valve (11), the first variable frequency water pump (12), the third throttle valve (20), the second variable frequency water pump (14), and the processing tank (10).

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