An automatic control method for evaporation temperature

Abstract

This invention discloses an automatic evaporation temperature control method, relating to the field of evaporators. The method includes a closed inner cavity formed by upper and lower shells joined together. The upper shell is equipped with a water inlet and a steam outlet. A water probe, one end of which extends into the inner cavity and the other end of which extends out of the upper shell and is electrically connected to the upper shell via a control line, forms a water probe circuit. An electric heating element is integrally formed inside the lower shell. A temperature sensor is fixed to the lower shell. A signal control circuit is electrically connected to the water probe and the temperature sensor, respectively. The water probe sends a water level signal to the signal control circuit, and the temperature sensor sends an inner cavity temperature signal to the signal control circuit. The signal control circuit controls the water injection volume at the water inlet based on the water level and temperature signals. This invention controls the water injection volume based on both the water level and temperature signals within the evaporator cavity, improving the accuracy of temperature control and effectively ensuring the temperature stability and consistency after water vaporization.

Description

Technical Field

[0001] This invention relates to the field of evaporators, and more specifically to an automatic evaporation temperature control method. Background Technology

[0002] As people's living standards continue to improve, household steam appliances with steam generators, such as steam mops, floor scrubbers, and garment steamers, are becoming increasingly popular. To improve the efficiency of disinfection, sterilization, and cleaning, higher requirements are being placed on the temperature and stability of the steam output from the evaporator.

[0003] Chinese patent document (CN215372393U) discloses a precise temperature-measuring electric heating evaporator, including a heating pot and a heating and temperature-measuring component placed flat on the bottom of the outer wall of the heating pot. The heating and temperature-measuring component includes a first heating wire and a second heating wire with a common terminal. The first heating wire is used for heating, and the second heating wire is used for temperature measurement. The resistance of the first heating wire is less than that of the second heating wire. Since the heating element is placed flat on the bottom of the outer wall of the heating pot, there is no heating element inside the heating pot, which is convenient for users to clean and use. Furthermore, while this technical solution can achieve precise temperature measurement, the temperature inside the evaporator can only be controlled by switching the heating wire on and off. It does not provide a structure and method for achieving precise temperature control based on the water volume and water temperature inside the evaporator. Therefore, it cannot achieve precise control over the output steam temperature. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an automatic evaporation temperature control method, which has the advantages of automatic inductive temperature measurement, simple structure and strong implementation, strong temperature sensing sensitivity, fast response time, small sensing error and strong consistency, and low implementation cost.

[0005] The objective of this invention is achieved through the following technical solution: an evaporator with an automatic temperature sensing system, comprising...

[0006] A closed inner cavity is formed by two shells, an upper shell and a lower shell, which are fastened together. The upper shell is equipped with a water inlet connector and a steam outlet connector that communicate with the inner cavity. The water inlet connector is used to inject evaporation water into the inner cavity, and the steam outlet connector is used to output steam.

[0007] A water probe is installed on the top of the upper shell. One end of the water probe extends into the inner cavity to sense the water level. The other end of the water probe extends out of the upper shell and is electrically connected to the surface of the upper shell by a control line to form a water probe circuit.

[0008] The heating element, integrally formed inside the lower shell, is used to heat the evaporating water;

[0009] A temperature sensor, fixed to the lower housing, is used to monitor the internal cavity temperature in real time; and

[0010] The signal control circuit is electrically connected to the water probe and the temperature sensor respectively. The water probe is used to send the water level height signal to the signal control circuit in real time, and the temperature sensor is used to send the internal cavity temperature signal to the signal control circuit in real time. The signal control circuit controls the water injection volume of the water inlet connector according to the water level height signal and the temperature signal.

[0011] As a further technical solution, the water inlet connector is controlled by an electromagnetic water pump for water injection, and the signal control circuit is electrically connected to the electromagnetic water pump for control.

[0012] As a further technical solution, a thermostat is installed on the lower shell, which controls the operation of the heating element through an electrical connection.

[0013] As a further technical solution, the water probe is fixedly connected to the upper shell by a fixing nut, the top of the water probe is electrically connected to the control line through a compression spring terminal, and the other end of the control line is electrically connected to the upper shell through a washer, with the washer fixed to the surface of the upper shell.

[0014] As a further technical solution, the bottom of the lower shell is equipped with a pressure relief valve that communicates with the inner cavity to release excessive pressure in the inner cavity.

[0015] An automatic evaporation temperature control method, using the above-mentioned evaporator with an automatic temperature sensing system, includes the following steps:

[0016] Step 1: Start the electromagnetic water pump to inject evaporation water into the inner cavity, and at the same time start the electric heating element to heat the inner cavity;

[0017] Step 2: When the water level in the inner cavity rises to contact the water probe, the water probe sends a contact signal to the signal control circuit. At the same time, the water probe also feeds back the detected water level and water volume information in the inner cavity to the signal control circuit.

[0018] Step 3: After receiving the trigger signal, the signal control circuit controls the temperature sensor to work, and the temperature sensor feeds back the internal cavity temperature signal to the signal control circuit in real time.

[0019] Step 4: The signal control circuit compares the received internal cavity temperature signal with the preset value. If the temperature is lower than the preset value, the signal control circuit controls the electromagnetic water pump to continue injecting water; if the temperature is greater than or equal to the preset value, the signal control circuit controls the electromagnetic water pump to stop injecting water.

[0020] As a further technical solution, in step four, the signal control circuit also controls the electromagnetic water pump according to the water level height signal of the water probe. When the water level height is less than or equal to the set minimum water level, the signal control circuit controls the electromagnetic water pump to continue injecting water; when the water level height is greater than or equal to the set maximum water level, the signal control circuit controls the electromagnetic water pump to stop injecting water.

[0021] The beneficial effects of this invention are as follows:

[0022] 1. The water level and temperature in the inner cavity are monitored in real time using a water probe and a temperature sensor, and communicated with the signal control circuit in real time. The signal control circuit controls the water intake through the water inlet connector, and finally controls the output steam temperature.

[0023] 2. The inlet connector is connected to the electromagnetic water pump and electrically connected to the signal control circuit to achieve precise control of the water inlet volume;

[0024] 3. The thermostat can automatically cut off the power to the heating element when the internal temperature is too high due to equipment failure, thus eliminating safety hazards;

[0025] 4. The pressure relief valve can automatically relieve pressure when the internal pressure is too high, thus preventing an explosion;

[0026] 5. The signal control circuit controls the water inflow based on both the water level and temperature signals inside the cavity, improving the accuracy of temperature control and effectively ensuring the temperature stability and consistency after water vaporization. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0028] Figure 2 This is a bottom-view structural diagram of the present invention.

[0029] Figure 3 This is a top view of the structure of the present invention.

[0030] Figure 4 for Figure 3 AA sectional view.

[0031] Figure 5 This is a schematic diagram of the water probe structure in this invention.

[0032] Explanation of reference numerals in the attached drawings: 1. Upper shell; 2. Lower shell; 3. Water inlet connector; 4. Steam outlet connector; 5. Compression spring terminal; 6. Fixing nut; 7. Water probe; 8. Control line; 9. Heating element; 10. Thermostat; 11. Pressure relief valve; 12. Temperature sensor; 13. Gasket; 14. Inner cavity; 15. Electromagnetic water pump. Detailed Implementation

[0033] The present invention will now be described in detail with reference to the accompanying drawings:

[0034] Example: As attached Figures 1-5 As shown, this evaporator with an automatic sensing and temperature measurement system includes an upper shell 1, a lower shell 2, a water inlet connector 3, a steam outlet connector 4, a spring terminal 5, a fixing nut 6, a water probe 7, a control line 8, an electric heating element 9, a thermostat 10, a pressure relief valve 11, a temperature sensor 12, a gasket 13, an inner cavity 14, an electromagnetic water pump 15, and a signal control circuit.

[0035] Reference Appendix Figure 1 , 4 After the upper shell 1 and the lower shell 2 are snapped together and installed, they are fixed together with bolts to form a closed inner cavity 14. A water inlet connector 3 and a steam outlet connector 4, which communicate with the inner cavity 14, are installed on the top of the upper shell 1. The water inlet connector 3 is used to inject evaporation water into the inner cavity 14, and the steam outlet connector 4 is used to output steam to the outside.

[0036] like Figure 4 As shown, a water probe 7 is inserted through the top of the upper shell 1, with its lower end extending into the inner cavity 14 to sense the water level (preferably, a certain distance is provided between the lower end of the water probe 7 and the bottom of the inner cavity 14). The upper end of the water probe 7 extends out of the upper shell 1 and is electrically connected to the surface of the upper shell 1 via a control line 8, forming a water detection circuit. Preferably, as shown... Figure 5 As shown, the water probe 7 is fixed to the upper shell 1 by a fixing nut 6. The top of the water probe 7 is electrically connected to the control line 8 through the spring terminal 5. The other end of the control line 8 is electrically connected to the upper shell 1 through the gasket 13. The gasket 13 is welded and fixed to the surface of the upper shell 1.

[0037] Furthermore, the heating element 9 is integrally molded within the lower shell 2 to heat the evaporation water in the inner cavity 14. The temperature sensor 12 (thermostat) is fixed to the lower shell 2 using high-temperature resistant curing adhesive (i.e., Figure 2 At location 12 (reference numeral 12), temperature sensor 12 can monitor the temperature of the inner cavity 14 in real time. Furthermore, a signal control circuit (which may be a control chip, controller, etc.) is electrically connected to the water probe 7 and temperature sensor 12 respectively. The water probe 7 sends a water level signal to the signal control circuit in real time, while the temperature sensor 12 sends a temperature signal of the inner cavity 14 to the signal control circuit in real time. In addition, the water inlet connector 3 controls water injection via an electromagnetic water pump 15 (the electromagnetic water pump 15 is connected to the water inlet connector 3 via a pipe), and the signal control circuit is also electrically connected to the electromagnetic water pump 15 for control. This allows the signal control circuit to precisely control the water injection volume of the water inlet connector 3 based on the water level and temperature signals.

[0038] Preferably, such as Figure 2As shown, a thermostat 10 is installed at the bottom of the lower shell 2. The thermostat 10 controls the operation of the heating element 9 via an electrical connection. The thermostat 10 can automatically cut off the power supply to the heating element 9 when the equipment malfunctions (when the temperature of the inner cavity 14 is too high), eliminating safety hazards. Preferably, a pressure relief valve 11 communicating with the inner cavity 14 is installed at the bottom of the lower shell 2. When the pressure in the inner cavity 14 is too high and exceeds the set value, the pressure relief valve 11 opens to release the excessive pressure in the inner cavity 14.

[0039] An automatic evaporation temperature control method, using the above-mentioned evaporator with an automatic temperature sensing system, includes the following steps:

[0040] Step 1: Start the electromagnetic water pump 15 to continuously inject evaporation water into the inner cavity 14, and at the same time start the electric heating tube 9 to heat the inner cavity 14;

[0041] Step 2: When the water level of the inner cavity 14 rises to contact with the water probe 7, the water probe 7 sends a contact signal to the signal control circuit. At the same time, the water probe 7 also detects (determines) the water level and the water volume information of the inner cavity 14, and feeds it back to the signal control circuit.

[0042] Step 3: After receiving the trigger signal, the signal control circuit controls the temperature sensor 12 to work, and the temperature sensor 12 feeds back the temperature signal of the inner cavity 14 to the signal control circuit in real time.

[0043] Step 4: The signal control circuit compares the received temperature signal of the inner cavity 14 with a preset value. If the temperature is lower than the preset value, the signal control circuit controls the electromagnetic water pump 15 to continue adding water; if the temperature is greater than or equal to the preset value, the signal control circuit controls the electromagnetic water pump 15 to stop adding water. Furthermore, during this process, the signal control circuit also controls the electromagnetic water pump 15 based on the water level signal from the water probe 7. When the water level is less than or equal to the set minimum water level, the signal control circuit controls the electromagnetic water pump 15 to continue adding water; when the water level is greater than or equal to the set maximum water level, the signal control circuit controls the electromagnetic water pump 15 to stop adding water. That is, when water reaches a certain height, the temperature inside the evaporator cavity drops, at which point the temperature sensor prompts the system to stop adding water, or the water probe prompts the system to stop adding water because the water level has reached the maximum. When a certain amount of water evaporates, the temperature inside the evaporator cavity rises, at which point the temperature sensor prompts the system to add water, or the water probe prompts the system to add water because the water level has reached the minimum.

[0044] This invention controls the water inflow based on both the water level and temperature signals within the evaporator cavity, improving the accuracy of temperature control and effectively ensuring the temperature stability and consistency after water vaporization. It also increases steam conversion efficiency, achieving higher steam temperatures and more effective disinfection, sterilization, and cleaning.

[0045] It is understood that, for those skilled in the art, any equivalent substitutions or modifications to the technical solutions and inventive concepts of this invention should fall within the scope of protection of the appended claims.

Claims

1. An automatic evaporation temperature control method, employing an evaporator with an automatic temperature sensing system, characterized in that, The evaporator with an automatic temperature sensing system includes A closed inner cavity (14) is formed by the upper shell (1) and the lower shell (2) being fastened together. The upper shell (1) is equipped with a water inlet connector (3) and a steam outlet connector (4) that communicate with the inner cavity (14). The water inlet connector (3) is used to inject evaporation water into the inner cavity (14), and the steam outlet connector (4) is used to output steam. A water probe (7) is installed on the top of the upper shell (1). One end of the water probe (7) extends into the inner cavity (14) to sense the water level. The other end of the water probe (7) extends out of the upper shell (1) and is electrically connected to the surface of the upper shell (1) by a control line (8) to form a water probe circuit. The water probe (7) is fixedly connected to the upper shell (1) by a fixing nut (6). The top end of the water probe (7) is electrically connected to the control line (8) through a spring terminal (5). The other end of the control line (8) is electrically connected to the upper shell (1) through a gasket (13). The gasket (13) is fixed on the surface of the upper shell (1). The electric heating element (9) is integrally formed inside the lower shell (2) and is used to heat the evaporation water; Temperature sensor (12), fixed on the lower shell (2), is used to monitor the temperature of the inner cavity (14) in real time; and The signal control circuit is electrically connected to the water probe (7) and the temperature sensor (12) respectively. The water probe (7) is used to send the water level height signal to the signal control circuit in real time, and the temperature sensor (12) is used to send the inner cavity (14) temperature signal to the signal control circuit in real time. The signal control circuit coordinates the water injection volume of the water inlet connector (3) according to the water level height signal and the temperature signal. The water inlet connector (3) controls water injection via an electromagnetic water pump (15), and the signal control circuit is electrically connected to the electromagnetic water pump (15) for control. The lower shell (2) is equipped with a thermostat (10), which controls the operation of the heating element (9) via an electrical connection; The bottom of the lower shell (2) is equipped with a pressure relief valve (11) that communicates with the inner cavity (14) to release excessive pressure in the inner cavity (14); The method includes the following steps: Step 1: Start the electromagnetic water pump (15) to inject evaporation water into the inner cavity (14), and at the same time start the electric heating tube (9) to heat the inner cavity (14); Step 2: When the water level of the inner cavity (14) rises to contact the water probe (7), the water probe (7) sends a contact signal to the signal control circuit. At the same time, the water probe (7) also feeds back the detected water level and water volume information of the inner cavity (14) to the signal control circuit. Step 3: After receiving the trigger signal, the signal control circuit controls the temperature sensor (12) to work, and the temperature sensor (12) feeds back the temperature signal of the inner cavity (14) to the signal control circuit in real time; Step 4: The signal control circuit compares the received temperature signal of the inner cavity (14) with the preset value, and controls the water injection action of the electromagnetic water pump (15) according to the temperature signal and the water level height signal. When the temperature signal is greater than or equal to a preset value, the electromagnetic water pump (15) is controlled to stop injecting water; when the temperature signal is less than the preset value, if the water level height signal indicates that the water level is lower than the set maximum water level, the electromagnetic water pump (15) is controlled to continue injecting water; if the water level height signal indicates that the water level reaches or exceeds the set maximum water level, the electromagnetic water pump (15) is controlled to stop injecting water.

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