CN215724282U

CN215724282U - Energy-saving baking system based on combination of opening and closing of heat pump technology

Info

Publication number: CN215724282U
Application number: CN202121246276.XU
Authority: CN
Inventors: 刘向伟; 王君; 杨志敏; 李栓柱; 陈宁; 孙云龙; 宋勇
Original assignee: Luoyang Sunrui Special Equipment Co Ltd
Current assignee: 725th Research Institute of CSIC; CSSC Shuangrui Luoyang Special Equipment Co Ltd
Priority date: 2021-06-04
Filing date: 2021-06-04
Publication date: 2022-02-01
Anticipated expiration: 2031-06-04

Abstract

The utility model provides an energy-conserving baking systems based on heat pump technique switching combines, including baking chamber and air source heat pump system, air source heat pump system includes inner loop main air fan, the condenser, inner loop auxiliary air fan, regenerator I, auxiliary heat exchanger, electromagnetic expansion valve, the main evaporator, compressor and regenerator II, utilize hot-blast backheat and phase transition energy circulation technique, through adjusting the fresh air door, the switching of hydrofuge air door and circulating fan, change the heat carrier-the circulation path of air, open hydrofuge when realizing the low temperature, the effect of closed intensification hydrofuge when high temperature, realize hydrofuge waste heat recovery and utilize, it is high to solve current air source heat pump baking house energy consumption, the atmospheric control is inaccurate, the unstable problem of material baking quality, overcome the single defect of air source heat pump baking mode, compact structure, energy-conserving efficient characteristics.

Description

Energy-saving baking system based on combination of opening and closing of heat pump technology

Technical Field

The utility model relates to the technical field of barbecue energy conservation, in particular to an energy-saving baking system based on the combination of opening and closing of a heat pump technology.

Background

At present, the drying process in agricultural products, agricultural and sideline products and food processing becomes an important process in the production process. Taking the tobacco baking requirement as an example, China is the country with the largest flue-cured tobacco yield in the world, and the number of the currently built intensive curing barn in China is 120 thousands, and most of the intensive curing barn are coal-fired curing barns. The coal-fired curing barn has the defects of unstable combustion process, uneven temperature rise, difficult accurate control of the tobacco curing process and the like, thereby influencing the quality of the cured tobacco leaves. Meanwhile, the ineffective energy consumption of the coal-fired curing barn is too high, SO that fuel is wasted, and a large amount of SO is discharged₂NOx, solid particulates, and the like cause environmental pollution. The air source heat pump is produced. The air source heat pump is driven by electric energy with air as a carrier of a heat transfer medium, and completes the transfer process of heat energy from low temperature to high temperature. The air source heat pump has the advantages of high comprehensive energy efficiency of the system, low operation cost, environmental friendliness, controllable drying process and the like, and can meet the individual requirements of the material baking process on temperature and humidity.

The working process of the existing air source heat pump generally adopts an open circulating system, namely, wet return air generated in a curing barn is discharged through a moisture discharging air door in the curing process, and new ambient air is replaced to enter. There is a large amount of energy losses in the in-process of wet return air emission, can arouse the great fluctuation of temperature and humidity in the roast room simultaneously, the accurate control of the process of being not convenient for to influence flue-cured tobacco quality.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model provides an energy-saving baking system based on the combination of opening and closing of a heat pump technology, which utilizes hot air heat regeneration and phase change energy circulation technologies, changes the circulation path of a heat carrier, namely air, by adjusting the opening and closing of a fresh air door, a moisture removal air door and a circulating fan, realizes the effects of open moisture removal at low temperature and closed temperature rise and moisture removal at high temperature, realizes the recycling of moisture removal waste heat, solves the problems of high energy consumption, inaccurate temperature and humidity control and unstable material baking quality of the existing air source heat pump baking room, overcomes the defect of single baking mode of the air source heat pump, and has the characteristics of compact structure, energy conservation and high efficiency.

In order to realize the technical purpose, the adopted technical scheme is as follows: an energy-saving baking system based on the combination of opening and closing of a heat pump technology comprises a baking chamber and an air source heat pump system, wherein the air source heat pump system comprises an inner circulation main fan, a condenser, an inner circulation auxiliary fan, a heat regenerator I, an auxiliary heat exchanger, an electromagnetic expansion valve, a main evaporator, a compressor and a heat regenerator II, the inner circulation main fan, the condenser, the inner circulation auxiliary fan, the heat regenerator I, the auxiliary heat exchanger and the heat regenerator II are arranged in the baking chamber, a heat regenerator II, a heat regenerator I and an auxiliary heat exchanger are arranged at an air return opening of the baking chamber, the inner circulation auxiliary fan, the condenser and the inner circulation main fan are sequentially arranged above the heat regenerator I and the auxiliary heat exchanger, a fresh air door arranged on the baking chamber is arranged at a cold fluid inlet of the heat regenerator II, a moisture exhaust air door arranged on the baking chamber is arranged at a hot fluid outlet of the heat regenerator II, the cold fluid outlet and the hot fluid inlet of the heat regenerator II are respectively arranged corresponding to the air side inlet of a condenser and the air return inlet of a baking chamber, the hot fluid inlet and the hot fluid outlet of the heat regenerator I are respectively arranged corresponding to the air return inlet of the baking chamber and the air circulation channel inlet of the auxiliary heat exchanger, the air circulation channel outlet of the auxiliary heat exchanger is arranged corresponding to the cold fluid inlet of the heat regenerator I, the cold fluid outlet of the heat regenerator I is arranged corresponding to the air side inlet of the condenser, the refrigerant inlet of the auxiliary heat exchanger is connected with the refrigerant outlet of the condenser through a pipeline and an electromagnetic expansion valve, the refrigerant outlet of the auxiliary heat exchanger is connected with the refrigerant inlet of a compressor through a pipeline, the refrigerant inlet of a main evaporator is connected with the refrigerant outlet of the condenser through a pipeline and a main expansion valve, the refrigerant outlet of the auxiliary heat exchanger is connected with the refrigerant inlet of the compressor through a pipeline, the outlet of the compressor is connected with the refrigerant inlet of the condenser through a pipeline.

And a sealed air channel is arranged between a hot fluid outlet of the heat regenerator I and an air circulation channel inlet of the auxiliary heat exchanger.

The internal circulation main fan is a frequency-adjustable fan.

The internal circulation auxiliary fan is a frequency-adjustable fan.

The utility model has the beneficial effects that: the energy-saving baking system and device based on the combination of opening and closing of the heat pump technology can change the circulation channel of return air by effectively adjusting four key components, namely the fresh air door, the dehumidifying air door, the electromagnetic expansion valve and the internal circulation auxiliary fan, and realize the double-mode working flow of low-temperature open dehumidification in the early baking stage and closed temperature rise dehumidification in the later baking stage. Under the combined action of the heat regenerator II and the auxiliary heat exchanger, the closed cycle dehumidification process can be realized without discharging hot air, the energy loss is small, and the energy consumption of the system is reduced. The closed temperature rise and humidity discharge process provided by the utility model realizes humidity discharge by reducing the return air temperature, is continuous and stable, and is beneficial to realizing the accurate control of the temperature and the humidity in the space of the baking chamber. The system can achieve the purposes of energy conservation, high efficiency, temperature rise and dehumidification, and is compact in structure and simple to control and adjust.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the air circulation for implementing the open bake mode of the present invention;

FIG. 3 is a schematic view of the air circulation for implementing the closed baking mode of the present invention;

in the figure: 1. a baking chamber, 2, heat regenerators II, 3, a fresh air door, 4, a moisture exhaust air door, 5, a compressor, 6, a main evaporator, 7, a main expansion valve, 8, an air duct, 9, an electronic expansion valve, 10, an auxiliary heat exchanger, 11, a heat regenerator I,

12. the system comprises an internal circulation auxiliary fan, 13 a condenser, 14 an internal circulation main fan, and 15 a baking oven door.

Detailed Description

The embodiments of the present invention are described below in terms of specific embodiments, and the functions and advantages of the present invention will be readily apparent to those skilled in the art from the disclosure of the present specification. It should be understood that the drawings are designed and described herein only for the purpose of illustrating the utility model, and not for the purpose of limiting the utility model, and that modifications of the structure, changes in the proportional relationship, and adjustments of the size and dimensions of the structure should fall within the scope of the utility model without affecting the function and achievement of the utility model.

The utility model can be used for a tobacco drying intensive curing barn, and can purposefully solve the problems of large heat loss, low energy consumption, unstable temperature and humidity control and the like in the moisture removing process of a conventional air source heat pump curing barn system, greatly reduce the energy consumption cost of the tobacco drying system and improve the quality of the cured tobacco leaves. The specific implementation mode is as follows:

referring to fig. 1, 2 and 3, an energy-saving baking system based on the combination of opening and closing of heat pump technology comprises a baking chamber 1 (or baking oven) and an air source heat pump system, wherein a baking oven door 15 is arranged on one side of the baking chamber 1, the air source heat pump system comprises an inner circulation main fan 14, a condenser 13, an inner circulation auxiliary fan 12, a heat regenerator I11, an auxiliary heat exchanger 10, an electromagnetic expansion valve 9, a main expansion valve 7, a main evaporator 6, a compressor 5 and a heat regenerator II 2, the inner circulation main fan 14, the condenser 13, the inner circulation auxiliary fan 12, the heat regenerator I11, the auxiliary heat exchanger 10 and the heat regenerator II 2 are arranged in the baking chamber 1, the heat regenerator II 2, the heat regenerator I11 and the auxiliary heat exchanger 10 are arranged at an air return port of the baking chamber 1, the inner circulation auxiliary fan 12, the condenser 13 and the inner circulation main fan 14 are sequentially arranged above the heat regenerator I11 and the auxiliary heat exchanger 10, a cold fluid inlet of the heat regenerator II 2 is provided with a fresh air door 3 arranged on the baking chamber 1, a hot fluid outlet of the heat regenerator II 2 is provided with a moisture exhaust air door 4 arranged on the baking chamber 1, a cold fluid outlet and a hot fluid inlet of the heat regenerator II 2 are respectively arranged corresponding to an air side inlet of a condenser 13 and a return air inlet of the baking chamber 1, a hot fluid inlet and a hot fluid outlet of the heat regenerator I11 are respectively arranged corresponding to a return air inlet of the baking chamber 1 and an air circulation channel inlet of the auxiliary heat exchanger 10, an air circulation channel outlet of the auxiliary heat exchanger 10 is arranged corresponding to a cold fluid inlet of the heat regenerator I11, a cold fluid outlet of the heat regenerator I11 is arranged corresponding to an air side inlet of the condenser 13, a refrigerant inlet of the auxiliary heat exchanger 10 is connected with a refrigerant outlet of the condenser 13 through a pipeline and an electromagnetic expansion valve 9, and a refrigerant outlet of the auxiliary heat exchanger 10 is connected with a refrigerant inlet of the compressor 5 through a pipeline, the refrigerant inlet of the main evaporator 6 is connected with the refrigerant outlet of the condenser 13 through a pipeline and a main expansion valve 7, and the refrigerant outlet of the main evaporator 6 is connected with the refrigerant inlet of the compressor 5 through a pipeline. The outlet of the compressor 5 is connected to the refrigerant inlet of the condenser 13 through a pipe.

And a sealed air duct 8 is arranged between a hot fluid outlet of the heat regenerator I11 and an air circulation channel inlet of the auxiliary heat exchanger 10.

The internal circulation main fan 14 is a frequency-adjustable fan. The internal circulation auxiliary fan 12 is a frequency-adjustable fan. The circulation direction, the wind speed, the wind quantity and the like of air in the system and the device can be changed by adjusting and controlling the frequency of the internal circulation main fan 14 and the internal circulation auxiliary fan 12, the requirement of the heat exchange quantity required in different stages of baking is realized, and the evaporation temperature in the auxiliary heat exchanger 10 is controlled by controlling the electromagnetic expansion valve 9 at the refrigerant inlet of the auxiliary heat exchanger 10 to complete the closed cooling and dehumidifying process of the air.

In the material baking process, when the temperature of air in the baking chamber 1 is gradually increased to the humidity and humidity set by dehumidification, an open baking mode is entered. At this time, the fresh air door 3 and the moisture exhaust door 4 are opened, and the internal circulation auxiliary fan 12 and the electromagnetic expansion valve 9 are closed. Hot air in the baking chamber 1 comes out from the return air inlet and enters a hot fluid inlet of a heat regenerator II 2, heat exchange is carried out with low-temperature ambient air entering the heat regenerator II 2 through a fresh air door 3, air side inlets entering a condenser 13 under the action of an internal circulation main fan 14 are further heated, heating heat exchange is realized by using a refrigerant, after refrigeration is carried out in the condenser 13, the air is pressurized and heated again through a main evaporator 6 and a compressor 5 and then enters the condenser 13, recycling is carried out, hot air in the baking chamber 1 flows out from a hot fluid outlet of the heat regenerator I and then flows out through a dehumidifying air door 4 discharging system, the purpose of primary dehumidification during baking is achieved, and a cooling effect is achieved on the spontaneous heating phenomenon of new tobacco leaves at the initial stage.

Along with the rise of the temperature in the baking system, the moisture content of the air is increased, and in order to reduce the fluctuation of the temperature and the humidity in the system, a closed baking mode is adopted for dehumidification. At this time, the fresh air door 3 and the moisture exhaust door 4 are closed, and the internal circulation auxiliary fan 12 and the electromagnetic expansion valve 9 are opened at the same time. High-temperature wet air coming out of a baking chamber 1 sequentially enters a heat regenerator I11 and an auxiliary heat exchanger 10 to be cooled under the action of an internal circulation auxiliary fan 12, the high-temperature wet air enters the heat regenerator I11 from a hot fluid inlet of the heat regenerator I11, is cooled in the heat regenerator I11, flows out from a hot fluid outlet of the heat regenerator I11 and then enters an air flow channel inlet of the auxiliary heat exchanger 10, is further cooled in the auxiliary heat exchanger 10, flows out from an air flow channel outlet of the auxiliary heat exchanger 10 and enters the heat regenerator I11 as a cold source of the heat regenerator I11, the cold source in the auxiliary heat exchanger 10 is a refrigerant flowing out of a condenser 13, the temperature of wet return air at an outlet of the heat regenerator I11 is reduced, water vapor in the wet return air is condensed into water, the water is discharged after being collected (not shown in the figure), the temperature of the wet return air at an outlet of the auxiliary heat exchanger 10 is further reduced, the water vapor in the wet return air is further condensed into water, after the water is collected, the water is discharged from the outlet of the auxiliary heat exchanger 10, and after two times of temperature reduction, the volume ratio of the water vapor in the return air is reduced to be extremely low at the outlet of the auxiliary heat exchanger 10, so that the return air is called dry return air. In the heat regenerator II 11, wet return air with higher temperature and higher humidity exchanges heat with dry return air with lower temperature and lower humidity from the auxiliary heat exchanger 10, and the dry return air enters a condenser 13 in the air source heat pump system to absorb heat and raise temperature after the temperature of the dry return air is raised, so that a closed circulation system of the return air is formed.

Claims

1. The utility model provides an energy-conserving baking system based on heat pump technology switching combines which characterized in that: comprises a baking chamber (1) and an air source heat pump system, wherein the air source heat pump system comprises an inner circulation main fan (14), a condenser (13), an inner circulation auxiliary fan (12), a heat regenerator I (11), an auxiliary heat exchanger (10), an electromagnetic expansion valve (9), a main expansion valve (7), a main evaporator (6), a compressor (5) and a heat regenerator II (2), the inner circulation main fan (14), the condenser (13), the inner circulation auxiliary fan (12), the heat regenerator I (11), the auxiliary heat exchanger (10) and the heat regenerator II (2) are arranged in the baking chamber (1), the heat regenerator II (2), the heat regenerator I (11) and the auxiliary heat exchanger (10) are arranged at an air return port of the baking chamber (1), the inner circulation auxiliary fan (12), the condenser (13) and the inner circulation main fan (14) are sequentially arranged above the heat regenerator I (11) and the auxiliary heat exchanger (10), the cold fluid inlet of the heat regenerator II (2) is provided with a fresh air door (3) arranged on the baking chamber (1), the hot fluid outlet of the heat regenerator II (2) is provided with a moisture exhaust air door (4) arranged on the baking chamber (1), the cold fluid outlet and the hot fluid inlet of the heat regenerator II (2) respectively correspond to the air side inlet of the condenser (13) and the air return inlet of the baking chamber (1), the hot fluid inlet and the hot fluid outlet of the heat regenerator I (11) respectively correspond to the air return inlet of the baking chamber (1) and the air circulation channel inlet of the auxiliary heat exchanger (10), the air circulation channel outlet of the auxiliary heat exchanger (10) corresponds to the cold fluid inlet of the heat regenerator I (11), the cold fluid outlet of the heat regenerator I (11) corresponds to the air side inlet of the condenser (13), the refrigerant inlet of the auxiliary heat exchanger (10) is connected with the refrigerant outlet of the condenser (13) through a pipeline and an electromagnetic expansion valve (9), the refrigerant outlet of the auxiliary heat exchanger (10) is connected with the inlet of the compressor (5) through one path of pipeline, the refrigerant inlet of the main evaporator (6) is connected with the refrigerant outlet of the condenser (13) through the pipeline and the main expansion valve (7), the refrigerant outlet of the main evaporator (6) is connected with the inlet of the compressor (5) through the pipeline, and the outlet of the compressor (5) is connected with the refrigerant inlet of the condenser (13) through the pipeline.

2. The energy-saving baking system based on the combination of the opening and the closing of the heat pump technology as claimed in claim 1, wherein: and a sealed air duct (8) is arranged between a hot fluid outlet of the heat regenerator I (11) and an air circulation channel inlet of the auxiliary heat exchanger (10).

3. The energy-saving baking system based on the combination of the opening and the closing of the heat pump technology as claimed in claim 1, wherein: the internal circulation main fan (14) is a frequency-adjustable fan.

4. The energy-saving baking system based on the combination of the opening and the closing of the heat pump technology as claimed in claim 1, wherein: the internal circulation auxiliary fan (12) is a frequency-adjustable fan.