CN109316055B - Energy-saving heating method - Google Patents
Energy-saving heating method Download PDFInfo
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- CN109316055B CN109316055B CN201811157269.5A CN201811157269A CN109316055B CN 109316055 B CN109316055 B CN 109316055B CN 201811157269 A CN201811157269 A CN 201811157269A CN 109316055 B CN109316055 B CN 109316055B
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/04—Cooking-vessels for cooking food in steam; Devices for extracting fruit juice by means of steam ; Vacuum cooking vessels
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/14—Cooking-vessels for use in hotels, restaurants, or canteens
- A47J27/16—Cooking-vessels for use in hotels, restaurants, or canteens heated by steam
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/38—Parts, details or accessories of cooking-vessels for withdrawing or condensing cooking vapors from cooking utensils
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/04—Cooking-vessels for cooking food in steam; Devices for extracting fruit juice by means of steam ; Vacuum cooking vessels
- A47J2027/043—Cooking-vessels for cooking food in steam; Devices for extracting fruit juice by means of steam ; Vacuum cooking vessels for cooking food in steam
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Abstract
The embodiment of the invention relates to an energy-saving heating method, which comprises the following steps: the control unit receives a starting instruction input by a user and generates a heating control signal and a fan control signal according to the starting instruction; the heating unit heats the liquid in the water tank of the heating device according to the heating control signal, so that the liquid in the water tank generates hot steam; the fan of the heating device is started according to the fan control signal; the hot steam is driven by the running of the fan, returns to the bottom from the top of the heating device through a gas circulation channel of the heating device to form heating circulation airflow in the heating device, and heats the object to be heated accommodated in the heating device; the control unit monitors air pressure data and steam temperature data in a box body of the heating device; when the air pressure data in the box body reach an air pressure threshold and the steam temperature data are lower than a preset temperature threshold, the control unit generates a micro pressure relief instruction and sends the micro pressure relief instruction to the pressure relief unit; the pressure relief unit is started according to the micro pressure relief instruction, and hot steam is exhausted in a set volume.
Description
Technical Field
The invention relates to the technical field of heating equipment, in particular to an energy-saving heating method.
Background
At present, most of heating devices in the prior art adopt a single heating mode, wherein the heating device is a device for heating an object to be heated by using hot steam, such as a rice steaming cabinet, and a water tank in the rice steaming cabinet is heated by using the heating device, so that water in the water tank generates hot steam to cook food by the rising of the hot steam. When the hot steam rises, the hot steam is condensed into water drops when meeting the cabinet body with lower temperature and is hung on the inner wall of the cabinet body. Therefore, the hot steam can not be recycled in the rice steaming cabinet, and the corresponding cooking time can be prolonged due to the low utilization rate of the hot steam, so that the cooking energy consumption is increased.
When food is cooked, the air pressure rises as the temperature in the rice steaming cabinet rises. According to the vapor pressure equation, under the condition that the internal volume of the rice steaming cabinet is not changed, when the gas pressure in the rice steaming cabinet rises to a certain value, the increase value of the steam temperature in the rice steaming cabinet is reduced along with the rise of the gas pressure, if the steam temperature in the rice steaming cabinet is kept at a certain height, the output power of heating equipment needs to be increased, so that the energy consumption is greatly wasted, and the requirements of the current market on the energy-saving and environment-friendly rice steaming cabinet cannot be well met.
Disclosure of Invention
The invention aims to provide an energy-saving heating method, which reduces the emission of hot steam, improves the utilization rate of the hot steam, saves the heating energy consumption, and ensures that a heating device is safer, more energy-saving and more environment-friendly.
In order to achieve the above object, the present invention provides an energy-saving heating method, comprising:
the control unit receives a starting instruction input by a user and generates a heating control signal and a fan control signal according to the starting instruction;
the heating unit heats the liquid in the water tank of the heating device according to the heating control signal, so that the liquid in the water tank generates hot steam, the hot steam rises and heats the object to be heated accommodated in the heating device;
the fan of the heating device is started according to the fan control signal;
the hot steam is driven by the operation of the fan, returns to the bottom of the heating device from the top of the heating device through a gas circulation channel of the heating device to form a heating circulation airflow in the heating device, performs internal circulation in the heating device, and continuously and uniformly heats the object to be heated accommodated in the heating device;
the control unit monitors air pressure data and steam temperature data in a box body of the heating device;
when the air pressure data in the box body reach an air pressure threshold value and the steam temperature data are lower than a preset temperature threshold value, the control unit generates a micro pressure relief instruction and sends the micro pressure relief instruction to the pressure relief unit;
the pressure relief unit is started according to the micro pressure relief instruction, the hot steam is discharged in a set volume, and the balance of the pressure and the temperature in the heating device is adjusted, so that the temperature of the hot steam can be continuously increased to reach the preset temperature threshold.
Preferably, after the heating unit heats the liquid in the water tank of the heating device according to the heating control signal, the energy-saving heating method further includes:
the control unit detects water level data of liquid in the water tank;
when the water level data is lower than a preset water level threshold, the control unit generates a water supplementing instruction and sends the water supplementing instruction to the water inlet unit;
and the water inlet unit supplies liquid in the water tank according to the water supplementing instruction.
Preferably, the heating unit heats the liquid in the water tank of the heating device according to the heating control signal specifically comprises:
the control unit acquires weight data of the substance to be heated according to the heating control signal;
according to the weight data of the substance to be heated, the control unit obtains the heating power;
the heating unit heats the liquid in the water tank according to the heating power.
Further preferably, after the heating unit heats the liquid in the water tank according to the heating power, the energy-saving heating method further includes:
and when the steam temperature data reaches the preset temperature threshold value, the control unit obtains heat preservation power according to the weight data of the substance to be heated, and heats the liquid in the water tank according to the heat preservation power.
Preferably, after the pressure relief unit is started according to the micro pressure relief instruction and the hot steam is exhausted in a set volume, the energy-saving heating method further includes:
and the steam recovery unit is used for condensing and recovering the discharged hot steam.
According to the energy-saving heating method provided by the embodiment of the invention, the hot steam in the heating device is circularly driven to form the internal circulating heating airflow in the box body, so that the object to be heated accommodated in the box body is circularly heated, the heat energy loss is reduced, and the utilization rate of the hot steam is improved. Simultaneously, adopt the mode of trace pressure release to regulate and control the intensification, when gaseous atmospheric pressure numerical value reached atmospheric pressure threshold value and the temperature was less than preset temperature threshold value in the heating device, automatic trace pressure release adjusted the balance of heating device internal pressure and temperature for the temperature of hot steam can obtain further promotion, reaches required heating temperature, thereby reaches the effect through trace pressure release intensification. The energy-saving heating method improves the utilization rate of the hot steam, saves the heating energy consumption, reduces the emission of the hot steam, and is safer, energy-saving and environment-friendly.
Drawings
Fig. 1 is a schematic structural diagram of a heating device applied to an energy-saving heating method provided by an embodiment of the invention;
FIG. 2 is a schematic flow chart of an energy-saving heating method according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a relationship between a pressure and a temperature of water vapor in a heating device of the energy-saving heating method according to the embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
The embodiment of the invention relates to an energy-saving heating method, which is used for circularly driving hot steam in a heating device to form internal circulating heating airflow in a box body, so that objects to be heated accommodated in the box body are circularly heated, the heat energy loss is reduced, and the utilization rate of the hot steam is improved. Simultaneously, adopt the mode of trace pressure release to regulate and control the intensification, when gaseous atmospheric pressure numerical value reached atmospheric pressure threshold value and the temperature was less than preset temperature threshold value in the heating device, automatic trace pressure release adjusted the balance of heating device internal pressure and temperature for the temperature of hot steam can obtain further promotion, reaches required heating temperature, thereby reaches the effect through trace pressure release intensification. The energy-saving heating method improves the utilization rate of the hot steam, saves the heating energy consumption, reduces the emission of the hot steam, and is safer, energy-saving and environment-friendly.
The energy-saving heating method provided by the embodiment of the invention can be applied to a corresponding intelligent heating device, as shown in fig. 1. In order to facilitate understanding of the energy-saving heating method provided by the embodiment of the present invention, an intelligent heating device in which the energy-saving heating method is applied is taken as an example, and the intelligent heating device is briefly described with reference to fig. 1, so as to assist in understanding the present invention. It can be understood that the application range of the energy-saving heating method provided by the invention is not limited to the intelligent heating device.
Intelligent heating device specifically includes: the device comprises a box body 1, a steam generator 2, a circulation driving device 3, a gas circulation channel 4, a temperature rise adjusting device 5, a condenser 6, a water return cup 7, a water column pipe 8, a pressure sensor 9, a temperature sensor 10, a control unit 11 and a heat insulation layer 12.
The box 1 is a housing of the intelligent heating device, and is preferably made of stainless steel material.
The steam outlet of the steam generator 2 is disposed at one side of the interior of the box 1, where the "one side" may refer to both the side edge of the interior of the box 1 and the bottom edge of the interior of the box 1. Specifically, the steam generator 2 includes a water tank 21, a heater 22, a water replenishing device 23, a water level detector 24, and a steam delivery pipe 25. Wherein, the water tank 21 is used for containing liquid water for generating hot steam, a steam outlet of the water tank 21 is connected with the inside of the box body 1 through a steam transmission pipeline 25, and the hot steam generated in the water tank 21 flows into the box body 1 through the steam transmission pipeline 25. The heater 22 is a heating unit of the intelligent heating device, outputs heat energy, is accommodated in the water tank 21 or is arranged outside the water tank 21, heats liquid in the water tank 21, accelerates evaporation of the liquid in the water tank 21, generates hot steam, and rises to heat an object to be heated accommodated in the tank body 1. The water supplementing device 23 is a water inlet unit of the intelligent heating device, a water inlet of the water supplementing device 23 is communicated with the inside of the water tank 21 and used for supplementing liquid in the water tank 21, and the water level detector 24 is arranged in the water tank 21 and used for monitoring the water level height in the water tank 21 in real time. When the water level in the water tank 21 is lower than the preset water level threshold, the water replenishing device 23 automatically replenishes the liquid in the water tank 21.
The circulation driving device 3 is used for driving the hot steam in the box body 1 to flow so as to form an internal circulation heating air flow. Specifically, the circulation driving device 3 includes a fan 31 and a motor 32. The fan 31 is arranged in the box body 1, the motor 32 is arranged outside the box body 1, and an output shaft of the motor 32 penetrates through the side wall of the box body 1 and is connected with the fan 31. Meanwhile, in order to ensure the tightness of the case 1, the output shaft of the motor 32 is sealed with the case 1.
In the process of circularly heating the object to be heated, the circulating direction of the hot steam can refer to the direction of the arrow in fig. 1. Specifically, the hot steam generated by the steam generator 2 rises from bottom to top in the box 1 and is driven by the fan 31 in the circulating driving device 3 to rise in an accelerating manner, when the hot steam rises to the top in the box 1, the hot steam flows to the gas circulating channel 4 arranged in the box 1 under the driving of the circulating driving device 3, and because the gas circulating channel 4 is communicated with one side of the steam outlet of the steam generator 2 in the box 1, the hot steam can return to one side of the steam outlet of the steam generator 2 in the box 1 through the gas circulating channel 4, and is internally circulated in the box 1, and the object to be heated is continuously and uniformly heated.
It should be understood that the hot steam formed by the heater 22 rises from the bottom of the cabinet 1 to the top of the cabinet 1 to heat the object to be heated accommodated in the cabinet 1, and the circulation driving device 3 drives the hot steam to circulate internally in the cabinet 1 to heat the object to be heated accommodated in the cabinet 1 continuously and uniformly, and the term "heating" is distinguished from the term "continuous and uniform heating" herein. The heater 22 generates a large amount of hot steam, drives the hot steam to continuously rise from the bottom to the top of the box body 1, the hot steam heats the object to be heated in the rising process, the hot steam in the process heats the object to be heated for the first time, the circulating driving device 3 drives the hot steam to carry out internal circulation through the gas circulating channel 4, the hot steam rising to the top of the box body 1 is promoted to return to the bottom, the hot steam rises together with the newly generated hot steam to continuously heat the object to be heated, and the steps are repeated, so that the temperature of the hot steam in the device is kept uniform, and the hot steam in the box body 1 is continuously and uniformly heated.
Meanwhile, in order to reduce the heat exchange between the hot steam and the outside of the box body 1 in the circulation process, reduce the energy consumption in the heating process and shorten the heating time of the object to be heated as much as possible, the heat insulation treatment is carried out between the gas circulation channel 4 and the outside of the box body 1 through the heat insulation layer 7. Specifically, gas circulation passageway 4 sets up in box 1, is equipped with insulating layer 7 on the box 1 part that is equipped with gas circulation passageway 4, reduces the heat energy that gives off the outside air when hot steam passes through gas circulation passageway 4 in the circulation process, and is more energy-concerving and environment-protective.
The pressure sensor 9 is disposed at the top of the box 1, and is configured to detect a pressure of the gas in the box 1, generate box pressure data according to the detected pressure of the gas in the box 1, and generate a pressure signal according to the box pressure data and feed the pressure signal back to the control unit 11. The temperature sensor 10 may be plural and disposed at the top and/or the bottom of the cabinet 1 to detect the temperature in the cabinet 1. The temperature sensor 10 generates steam temperature data according to the detected temperature in the cabinet 1, and generates a temperature signal according to the steam temperature data to be fed back to the control unit 11. The control unit 11 performs the next operation according to the acquired pressure signal and the steam temperature data.
The temperature rise adjusting device 5 is a pressure relief unit of the intelligent heating device, is arranged at the top of the box body 1 and is used for adjusting the pressure relief flow in the box body 1, so that the balance between the pressure and the temperature in the box body 1 is adjusted, the temperature of hot steam in the box body 1 can be continuously increased, and a preset temperature threshold value is reached. Specifically, the temperature rise adjusting device 5 includes a pressure relief passage 51, a pressure relief valve 52 and a driving motor 53, one end of the pressure relief passage 51 is communicated with the inside of the box body 1, the other end is connected to the outside of the box body 1, and the pressure relief valve 52 is arranged on the pressure relief passage 51. The driving motor 53 is mechanically connected to the pressure release valve 52, and controls the opening and closing of the pressure release channel 51 by controlling the opening and closing of the pressure release valve 52, and simultaneously, controls the pressure release speed of the hot steam by controlling the opening size of the pressure release valve 52, i.e. controls the flow rate of the hot steam leaking every second. When the pressure data in the box 1 reaches the air pressure threshold, and the steam temperature data is lower than the preset temperature threshold, the control unit 11 controls the driving motor 53 to start, thereby opening the pressure release valve 52, turn on the pressure release channel 51, and control the opening size of the pressure release valve 52 according to the difference between the air pressure in the box 1 and the air pressure threshold at the moment, so that the hot steam is discharged out of the box 1 through the pressure release channel 51 at a certain pressure release speed, when the discharged hot steam reaches the set volume, namely, when the air pressure in the box 1 reaches the air pressure threshold after the pressure release, the pressure release valve 52 is closed, thereby completing the micro pressure release of the hot steam, reducing the air pressure in the box 1, adjusting the balance between the pressure and the temperature in the box 1, and further achieving the effect that the hot steam continues to heat.
In addition, this intelligent heating device still is equipped with the vapor recovery unit, and is concrete, and the vapor recovery unit includes condenser 6, return water cup 7 and water column pipe 8. Wherein, the steam inlet of the condenser 6 is communicated with the outlet of the pressure release valve 52, the water inlet of the water column pipe 8 is connected with the recovery cup 7, and the outlet of the condenser 6 is communicated with the water inlet of the water column pipe 8 through the recovery cup 7. According to Torricelli's law, the sum of the pressure in the water column pipe 8 and the atmospheric pressure outside the tank 1 is balanced with the pressure in the tank 1, therefore, when the pressure in the tank 1 is constant, the height difference between the water column in the water column pipe 8 and the liquid in the water tank 21 is a certain value, so after condensed water flows into the water column pipe 8, in order to keep the internal and external pressures balanced, part of the water in the water column pipe 8 flows into the water tank 21, so that the height difference between the water column in the water column pipe 8 and the liquid in the water tank 21 is kept unchanged, namely the condensed water flows into the water tank 21 through the water column pipe 8, thereby realizing the condensation and recovery of hot steam discharged out of the tank 1, and avoiding the pollution caused by the hot steam entering the external environment.
The above is a description of the components of the intelligent heating device and the connection relationship between the components, which are applied to the energy-saving heating method provided by the embodiment of the present invention. The energy-saving heating method is described in detail below with reference to fig. 2 and 3.
Fig. 2 is a schematic flow chart of an energy-saving heating method according to an embodiment of the present invention. Referring to fig. 2, the energy-saving heating method includes the following steps:
and step 100, the control unit receives a starting instruction input by a user and generates a heating control signal and a fan control signal according to the starting instruction.
In particular, the control unit may be understood as a central controller in the intelligent heating device for processing data and signals. Besides, the intelligent heating device further comprises a water tank for generating hot steam, a heating unit for heating the water tank, a pressure relief unit for exhausting and relieving pressure and a fan for circulating the hot steam.
When the object to be heated in the tank needs to be heated, a user needs to input an activation instruction first. The control unit receives a starting instruction input by a user and generates a heating control signal and a fan control signal according to the starting instruction. Wherein, the heating control signal can be understood as a signal for controlling the starting of the heating unit, and the fan control signal can be understood as a signal for controlling the starting of the fan. The control unit sends the heating control signal and the fan control signal to the heating unit and the fan respectively. That is to say, the fan and the heating unit in the box body of the intelligent heating device are controlled and started by the control unit.
More specifically, before the control unit sends the heating control signal to the heating unit, the control unit may first obtain weight data of the substance to be heated accommodated in the box body according to the heating control signal, calculate heating power for heating the substance to be heated according to the weight data of the substance to be heated, and send the heating power and the heating control signal to the heating unit. In a specific embodiment, when the intelligent heating device is a steam box for cooking food, the process can be understood as that the control unit calculates the heating quantity required for heating the dish according to the quantity of the dish.
Wherein the heating power includes target temperature data and target time data of heating. The target temperature data may be understood as a set target temperature for heating the substance to be heated, and the target time data may be understood as a set period of time for heating the substance to be heated.
Specifically, the generated hot steam rises to heat the object to be heated accommodated in the heating device. The heating unit may be understood as a heating device capable of outputting heating energy, such as a heater disposed in a water tank in an intelligent heating device, to heat liquid in the water tank. The heating unit is started according to the received heating control signal, liquid in the water tank is heated according to the heating power, evaporation of the liquid in the water tank is accelerated, a large amount of hot steam is formed after the temperature of the liquid in the water tank rises to a certain value and rises to the top of the water tank from the bottom of the water tank, and the newly generated hot steam heats the object to be heated accommodated in the heating device for the first time in the rising process.
Preferably, the control unit detects water level data of the liquid of the water tank after the heating unit heats the liquid in the water tank according to the heating power. When the water level data is lower than the preset water level threshold, the control unit generates a water supplementing instruction and sends the water supplementing instruction to the water inlet unit, and the water inlet unit supplements liquid in the water tank according to the water supplementing instruction, so that the liquid in the water tank keeps a certain water level, and the liquid in the water tank of the heating device in the operation process is ensured to be sufficient and not evaporated to dryness.
And 102, starting a fan of the heating device according to a fan control signal.
In particular, a fan is understood to be a fan or an air extraction device that can generate wind.
And starting rotation of the fan according to the fan control signal while the heating unit starts heating the liquid in the water tank according to the heating control signal, or preferably after the heating unit heats the liquid in the water tank for a preset time. The preset time may be understood as the expected time when the liquid in the water tank starts to generate hot steam, or may be understood as the preset time calculated by the control unit according to the amount of liquid in the water tank and the heating power, or input by the user at the beginning.
And 103, driving the hot steam by the running of the fan, returning the hot steam to the bottom of the heating device from the top of the heating device through a gas circulation channel of the heating device to form heating circulation airflow in the heating device, performing internal circulation in the heating device, and continuously and uniformly heating the object to be heated accommodated in the heating device.
Specifically, after the fan starts to operate according to the fan control signal, the hot steam rises from the bottom of the box body to the top of the box body, and is driven by wind power generated by the fan to return to the bottom of the box body, preferably, the hot steam flows downwards from the periphery of the inner side surface of the box body to form heating circulating airflow in the heating device, the heating circulating airflow is subjected to internal circulation, the heating circulating airflow returns to the bottom from the top of the box body, rises together with the newly generated hot steam, and heats the object to be heated again, and the operation is repeated, so that the temperature of the hot steam in the device is kept uniform, and the object to be heated accommodated in the heating device is.
Specifically, the control unit detects the pressure of the gas in the heating device box through the pressure sensor, generates gas pressure data in the box and sends the gas pressure data to the control unit, and therefore the control unit monitors the gas pressure in the box. In addition, the control unit detects the steam temperature data in the heating device box body through the temperature sensor, generates the steam temperature data and sends the steam temperature data to the control unit, and the control unit monitors the steam temperature of the hot steam in the heating device box body.
And 105, judging whether the air pressure data in the box body reaches an air pressure threshold value and whether the steam temperature data is lower than a preset temperature threshold value.
Specifically, the change rule of the pressure and the temperature of the gas in the box body follows the rule of a vapor pressure equation. The vapor pressure equation is a functional relation between the saturated vapor pressure and the temperature of a pure substance, and is commonly used for calculating standard state fugacity, evaporation heat, sublimation heat, phase equilibrium correlation and the like.
For water as an example, the vapor pressure equation can be derived from the Kerberon equation and can be derived from the relationship of water vapor pressure to temperature as shown in FIG. 3. As shown in fig. 3, when the gas pressure in the heating device increases to a certain value while the internal volume of the heating device is not changed, the increase value of the steam temperature is obviously decreased with the increase of the gas pressure, and the saturated vapor pressure is rapidly increased with the increase of the temperature. Therefore, when the pressure of the gas in the box body rises to a certain value, but the temperature of the steam in the box body does not reach a set value, the gas in the box body is properly subjected to micro pressure relief, and the temperature in the box body is favorably kept increasing. That is to say, before carrying out the micro-pressure relief, the control unit needs to judge whether the received air pressure data in the box body reaches the air pressure threshold value or not, and whether the steam temperature data is still lower than the preset temperature threshold value or not. The preset temperature threshold is target temperature data, and the air pressure threshold may be calculated by the control unit according to a vapor pressure equation from volume data in the tank and the target temperature data, or may be input by a user.
When the air pressure data in the box body reaches the air pressure threshold value and the steam temperature data is lower than the preset temperature threshold value, the following step 106 is executed. And if the air pressure data in the box body does not reach the air pressure threshold value, or the air pressure data in the box body reaches the air pressure threshold value, but the steam temperature data reaches the target temperature threshold value, returning to the step 104, and continuing to monitor the air pressure data and the steam temperature data in the box body.
Preferably, after the air pressure data in the tank reaches the air pressure threshold and the steam temperature data is lower than the preset temperature threshold, before step 106 is executed, the control unit further needs to determine whether the heating time data is within the target time data, where the heating time data may be understood as the time when the heating unit has heated the water tank. This process may be understood as a process of judging whether or not the material to be heated has been heated. When the heating time data is within the target time data, which indicates that the heating process has not ended, the following step 106 is performed. If the heating time data exceeds the target time data, which indicates that the heating process is finished, the process is finished.
Further preferably, when determining whether the air pressure data in the box body has reached the air pressure threshold and the steam temperature data is lower than the target temperature data, the control unit determines whether the steam temperature data is lower than the target temperature data, and after determining that the steam temperature data is lower than the target temperature data, determines whether the air pressure data in the box body has reached the air pressure threshold.
When the air pressure data in the box body reaches the air pressure threshold value and the steam temperature data is lower than the preset temperature threshold value, the step 105 is carried out to the step 106.
And 106, generating a micro-pressure relief instruction by the control unit and sending the micro-pressure relief instruction to the pressure relief unit.
In particular, a pressure relief unit is understood to mean a temperature rise control device with a pressure relief valve. When the pressure relief valve was opened, the pressure release passageway switched on, and outside the hot steam in the box was discharged to the box through the pressure release passageway that switches on with certain pressure release speed, when the pressure relief valve was closed, the box was a inclosed cabinet body, and hot steam in it can not spill outside the heating device box. The opening and closing of the pressure relief valve are automatically controlled by a driving motor.
When the air pressure data in the box body reach an air pressure threshold value and the steam temperature data are lower than the target temperature data, the control unit generates a micro-pressure-relief instruction and sends the micro-pressure-relief instruction to the pressure-relief unit, namely the control unit sends the micro-pressure-relief instruction to a driving motor of the pressure-relief unit.
And 107, starting the pressure relief unit according to the micro pressure relief instruction, discharging the hot steam with a set volume, and adjusting the balance of the pressure and the temperature in the heating device to continuously increase the temperature of the hot steam so as to reach a preset temperature threshold value.
Specifically, the pressure release valve among the pressure release unit receives the pressure release instruction a little, analyzes it to according to this pressure release instruction a little starts, and driving motor starts the back control pressure release valve and opens, and pressure release channel switches on, makes hot steam discharge through pressure release channel with certain pressure release speed, when the hot steam of emission reaches the volume of settlement, when the gas pressure in the box reaches the atmospheric pressure threshold value promptly this moment, closes the pressure release valve. This process may be understood as a process of micro-venting.
Preferably, after the heating unit heats the liquid in the water tank, when the control unit determines that the steam temperature data reaches the preset temperature threshold value, that is, the steam temperature data reaches the target temperature data, and the heating time data is within the target time data, the control unit obtains the heat preservation power according to the weight data of the substance to be heated, heats the liquid in the water tank of the heating device according to the heat preservation power, so that the liquid in the water tank generates heat preservation steam, and preserves the heat of the object to be heated accommodated in the tank body by using the heat preservation steam generated according to the heat preservation power.
Further, after step 107, the steam recovery unit in the heating device performs condensation recovery of the discharged hot steam.
Specifically, the steam recovery unit may be understood as a device capable of condensing and recovering the hot steam discharged to the outside of the tank. The steam recovery unit comprises a condenser, a water return cup and a water column pipe, wherein the condenser is used for cooling discharged hot steam, the cooled hot steam forms condensed water which is discharged into the water return cup and flows into the water column pipe, and the condensed water is guided into the water tank of the heating device through the water column pipe for keeping the internal pressure and the external pressure balanced according to Torricelli's law because the other end of the water column pipe is communicated with the bottom of the water tank of the heating device.
The control unit generates a condensation recovery signal and sends the signal to the condenser. The condenser is started according to the condensation recovery signal, and the hot steam discharged by the pressure release valve is condensed, and the hot steam is cooled to form condensed water which flows into the water returning cup and is guided into the water tank through the water column pipe, so that zero emission of the hot steam is realized, and the energy conservation and the environmental protection are realized.
According to the energy-saving heating method provided by the embodiment of the invention, the hot steam in the heating device is circularly driven to form the internal circulating heating airflow in the box body, so that the object to be heated accommodated in the box body is circularly heated, the heat energy loss is reduced, and the utilization rate of the hot steam is improved. Simultaneously, adopt the mode of trace pressure release to regulate and control the intensification, when gaseous atmospheric pressure numerical value reached atmospheric pressure threshold value and the temperature was less than preset temperature threshold value in the heating device, automatic trace pressure release adjusted the balance of heating device internal pressure and temperature for the temperature of hot steam can obtain further promotion, reaches required heating temperature, thereby reaches the effect through trace pressure release intensification. The energy-saving heating method improves the utilization rate of the hot steam, saves the heating energy consumption, reduces the emission of the hot steam, and is safer, energy-saving and environment-friendly.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (4)
1. An energy-saving heating method, characterized by comprising:
the control unit receives a starting instruction input by a user and generates a heating control signal and a fan control signal according to the starting instruction;
the heating unit heats the liquid in the water tank of the heating device according to the heating control signal, so that the liquid in the water tank generates hot steam, the hot steam rises and heats the object to be heated accommodated in the heating device;
the fan of the heating device is started according to the fan control signal;
the hot steam is driven by the operation of the fan, returns to the bottom of the heating device from the top of the heating device through a gas circulation channel of the heating device to form a heating circulation airflow in the heating device, performs internal circulation in the heating device, and continuously and uniformly heats the object to be heated accommodated in the heating device;
the control unit monitors air pressure data and steam temperature data in a box body of the heating device;
when the air pressure data in the box body reach an air pressure threshold value and the steam temperature data are lower than a preset temperature threshold value, the control unit generates a micro pressure relief instruction and sends the micro pressure relief instruction to the pressure relief unit;
the pressure relief unit is started according to the micro pressure relief instruction, the hot steam is discharged in a set volume, and the balance of the pressure and the temperature in the heating device is adjusted, so that the temperature of the hot steam can be continuously increased to reach the preset temperature threshold;
the heating unit heats the liquid in the water tank of the heating device according to the heating control signal, and the heating unit specifically comprises the following steps:
the control unit acquires weight data of the substance to be heated according to the heating control signal;
according to the weight data of the substance to be heated, the control unit obtains the heating power;
the heating unit heats the liquid in the water tank according to the heating power.
2. The energy-saving heating method according to claim 1, further comprising, after the heating unit heats the liquid in the water tank of the heating apparatus according to the heating control signal:
the control unit detects water level data of liquid in the water tank;
when the water level data is lower than a preset water level threshold, the control unit generates a water supplementing instruction and sends the water supplementing instruction to the water inlet unit;
and the water inlet unit supplies liquid in the water tank according to the water supplementing instruction.
3. The energy-saving heating method according to claim 1, further comprising, after the heating unit heats the liquid in the water tank according to the heating power:
and when the steam temperature data reaches the preset temperature threshold value, the control unit obtains heat preservation power according to the weight data of the substance to be heated, and heats the liquid in the water tank according to the heat preservation power.
4. The energy-saving heating method according to claim 1, wherein after the pressure relief unit is activated according to the micro pressure relief command to discharge the hot steam by a set volume, the energy-saving heating method further comprises:
and the steam recovery unit is used for condensing and recovering the discharged hot steam.
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| CN110063649B (en) * | 2019-06-17 | 2020-12-29 | 浙江维亨食品股份有限公司 | Steam backflow type energy-saving food steamer |
| CN111297178B (en) * | 2020-04-17 | 2022-03-29 | 青岛海尔智慧厨房电器有限公司 | Steam box and control method thereof |
| CN113331678B (en) * | 2021-06-18 | 2023-04-25 | 南京以禾电子科技有限公司 | Self-adaptive fuel steam box for high plains |
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| JP4171692B2 (en) * | 2003-10-16 | 2008-10-22 | 松下電器産業株式会社 | rice cooker |
| CN201349957Y (en) * | 2008-11-28 | 2009-11-25 | 张镇强 | Energy-saving environment-friendly steaming cabinet |
| CN101940433B (en) * | 2010-02-22 | 2012-10-17 | 谢国华 | Electric heating kettle with weighting function and weighting control method thereof |
| CN105652680B (en) * | 2016-03-11 | 2019-01-25 | 浙江爱妻电器有限公司 | A kind of intelligent cooking system and method |
| CN105816019A (en) * | 2016-05-29 | 2016-08-03 | 南昌大学 | Multifunctional electric steam box |
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