A counterflow rapid heating heater

Abstract

The utility model discloses a kind of counterflow type fast heating heater, belong to the field of heater, solve the function of immediate heating of lower inlet upper outlet fast heating barrel can be realized, there is boiling steam phenomenon at the water outlet of fast heating barrel in heating process, cause the problem of unstable water temperature and unstable water flow. Including inner bag, and the shell fixedly connected at its outside, the upper end and the lower end outer ring of inner bag are respectively communicated with the water inlet and the water outlet that pass through shell to outside, water inlet pipe can be open and closed setting, inner bag is provided with the drain plate between water inlet and water outlet, there are several evenly set and be penetrated by it on drain plate Screen hole. The utility model counterflow type fast heating heater uses the counterflow mode of upper inlet lower outlet, cold water and overhot water carry out heat exchange, heating pipe is heated to water and then flows out from lower water outlet, guarantee water temperature and flow stability. The drain plate of inner bag makes water inlet even down flow, avoid the problem of unstable water temperature and unstable flow due to boiling steam.

Description

Technical Field

[0001] This utility model relates to the field of heaters, and more particularly to a counter-flow rapid heating heater. Background Technology

[0002] Bottom-inlet, top-outlet rapid-heating tanks are high-efficiency and energy-saving water heater accessories, primarily used for quickly heating water. Their working principle involves water entering from the bottom, rapidly heating itself through built-in heating elements (such as electric heating tubes or heat exchangers), and then flowing out from the top, achieving instant hot water. This design effectively avoids the preheating waiting time of traditional storage water heaters, meeting users' needs for immediate hot water. Bottom-inlet, top-outlet rapid-heating tanks are widely used in homes, commercial spaces, and industrial sectors, especially suitable for scenarios with frequent and high-volume hot water demand. Their advantages include energy saving, high efficiency, easy installation, and long service life. With continuous technological advancements, the heating efficiency and safety of bottom-inlet, top-outlet rapid-heating tanks are constantly improving, making them an important component of modern hot water supply systems.

[0003] However, although the bottom-inlet and top-outlet quick-heating tank can achieve the function of instant hot water, there will be boiling and steam generation at the outlet of the quick-heating tank during the heating process, resulting in unstable water temperature and unstable water flow.

[0004] Therefore, a counter-flow rapid heating heater is proposed to solve or alleviate the above problems. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a counter-flow rapid heating heater.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A counter-current rapid heating heater includes an inner tank and an outer shell fixedly connected to its outer side. The upper and lower outer rings of the inner tank are respectively connected to an inlet and an outlet that penetrate the outer shell to the outside. The inlet pipe is openable and closable. A drainage plate is provided inside the inner tank between the inlet and the outlet. The drainage plate has a plurality of uniformly arranged sieve holes that penetrate it.

[0007] Preferably, a fixed flange is fixedly connected to the lower end of the inner liner, and a heating tube located inside the inner liner and below the drainage plate is fixedly connected to the fixed flange. A fixed plate is fixedly connected to the upper end of the inner liner, and an upper float and a lower float are fixedly connected to the fixed plate through a fixed connecting rod.

[0008] Preferably, the water inlet pipe is connected to a solenoid valve to enable it to be opened and closed. When the water level in the inner tank is lower than the upper float ball, the solenoid valve opens; otherwise, the solenoid valve closes. When the water level in the inner tank is lower than the lower float ball, the heating element stops operating.

[0009] Preferably, it also includes several temperature sensors. Several mounting holes are provided on the outer casing located below the hydrophobic plate, spaced apart along its length. The temperature sensors are disposed in the mounting holes and are used to detect the water temperature below the hydrophobic plate. When the temperature sensor reports that the water temperature is lower than the set temperature, the heating tube works; otherwise, it stops working.

[0010] Preferably, the upper outer ring of the inner liner is connected to an overflow port that penetrates the outer shell, and the horizontal height of the overflow port is greater than the horizontal height of the water inlet.

[0011] Preferably, the outer ring of the outer casing is fixedly connected to a mounting plate.

[0012] This utility model has the following beneficial effects: This utility model's counter-flow rapid heater adopts a top-inlet, bottom-outlet counter-flow method, where cold water and superheated water exchange heat. The heating element then heats the water before it flows out from the bottom outlet, ensuring stable outlet water temperature and flow rate. The drain plate in the inner tank ensures even downward flow of the inlet water, avoiding problems such as unstable outlet water temperature and flow rate caused by boiling and steam generation. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the present invention.

[0015] In the diagram: 1. Outer shell; 2. Inner tank; 3. Inlet; 4. Outlet; 5. Fixed flange; 6. Heating tube; 7. Mounting plate; 8. Overflow port; 9. Fixed plate; 10. Fixed connecting rod; 11. Upper float; 12. Lower float; 13. Drain plate; 14. Mounting hole. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0018] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0019] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] Furthermore, the terms "first," "second," and "third" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0021] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] A counter-current rapid heating heater, such as Figure 1 and Figure 2 As shown, it includes an inner liner 2 and a stainless steel outer shell 1 fixedly connected to its outer side. The upper and lower outer rings of the inner liner 2 are respectively connected to an inlet 3 and an outlet 4 that penetrate the outer shell 1 to the outside. The inlet pipe can be opened and closed. A drainage plate 13 is provided inside the inner liner 2 between the inlet 3 and the outlet 4. The drainage plate 13 has a number of uniformly arranged sieve holes that penetrate it.

[0023] In practical application, this counter-flow rapid heater adopts a counter-flow method, that is, a top-in, bottom-out water flow. The cold water at the inlet 3 exchanges heat with the superheated water, and during the downward flow, the heating tube 6 heats the exchanged water, which then flows out through the outlet 4. This stabilizes the outlet water temperature and flow rate. Furthermore, the drainage plate 13 inside the inner tank 2 ensures that the inlet water flows evenly through its sieve holes, preventing unstable outlet water temperature and flow rate caused by boiling and steam generation at the outlet 4 during heating.

[0024] Preferably, a fixing flange 5 is fixedly connected to the lower end of the inner liner 2, and a heating pipe 6 located inside the inner liner 2 and below the drainage plate 13 is fixedly connected to the fixing flange 5. A fixing plate 9 is fixedly connected to the upper end of the inner liner 2, and an upper float ball 11 and a lower float ball 12 are fixedly connected to the fixing plate 9 through a fixing connecting rod 10.

[0025] The water inlet pipe is connected to a solenoid valve to enable it to be opened and closed. When the upper float ball 11 provides feedback that the water level in the inner tank 2 is lower than the upper float ball 11, the solenoid valve opens; otherwise, the solenoid valve closes. When the lower float ball 12 provides feedback that the water level in the inner tank 2 is lower than the lower float ball 12, the heating element 6 stops operating.

[0026] It also includes a signal detection module, a logic control circuit, and an execution drive circuit. The output of the signal detection module is connected to the input of the logic control module, and the output of the logic control module is connected to the input of the execution drive module. The logic control module generates control commands based on the output signal of the signal detection module. The execution drive module includes a valve drive unit and a pipe drive unit, which respond to the commands of the logic control module to control the start and stop of the solenoid valve and the heating pipe 6, respectively. The logic control circuit is electrically connected to the solenoid valve and the heating pipe 6 through the execution drive circuit.

[0027] Both the upper float 11 and the lower float 12 can be embedded with magnets. The signal detection module includes an upper Hall sensor and a lower Hall sensor, which are used to detect whether the water level is lower than the preset position of the upper float 11 and the lower float 12, respectively. Specifically, the magnets can be neodymium magnets, and the upper Hall sensor and the lower Hall sensor can be AH49E linear Hall sensors.

[0028] The VCC pin of the upper Hall sensor is connected to a 5V voltage, the GND pin of the upper Hall sensor is grounded, the OUT pin of the upper Hall sensor is connected in series with a first pull-up resistor to a 5V voltage, the OUT pin of the upper Hall sensor is connected in parallel with a first filter capacitor to ground, and the OUT pin of the upper Hall sensor is connected in series with a first current-limiting resistor and then coupled to the input terminal of the logic control circuit. The VCC pin of the lower Hall sensor is connected to a 5V voltage, the GND pin of the lower Hall sensor is grounded, the OUT pin of the lower Hall sensor is connected in series with a second pull-up resistor to a 5V voltage, the OUT pin of the lower Hall sensor is connected in parallel with a second filter capacitor to ground, and the OUT pin of the lower Hall sensor is connected in series with a second current-limiting resistor and then coupled to the input terminal of the logic control circuit.

[0029] The logic control module includes a first NPN transistor and a second NPN transistor. The base of the first NPN transistor is connected to the OUT pin of the upper Hall sensor through a first current-limiting resistor. The emitter of the first NPN transistor is grounded. The collector of the first NPN transistor is connected to the control terminal of the valve drive unit. The base of the second NPN transistor is connected to the OUT pin of the lower Hall sensor through a second current-limiting resistor. The emitter of the second NPN transistor is grounded. The collector of the second NPN transistor is connected to the control terminal of the valve drive unit.

[0030] The valve drive unit includes a five-pin electromagnetic relay and a first freewheeling diode. The positive terminal of the coil of the five-pin electromagnetic relay is connected to the positive terminal of a 12V DC power supply, and the negative terminal of the coil of the five-pin electromagnetic relay is connected to the collector of a first NPN transistor. The normally open contact pin of the five-pin electromagnetic relay is connected in series with the solenoid valve and then connected to the live wire of a 220V AC power supply. The common contact pin of the five-pin electromagnetic relay is connected to the neutral wire of a 220V AC power supply. The anode of the first freewheeling diode is connected to the collector of the first NPN transistor, and the cathode is connected to the positive terminal of the 12V DC power supply.

[0031] The tube drive unit includes a solid-state relay. The positive terminal of the solid-state relay is connected to the collector of the second NPN transistor, the negative terminal of the solid-state relay is grounded, the positive terminal of the solid-state relay is connected to the live wire of the 220V AC power supply, and the negative terminal of the solid-state relay is connected in series with the heating tube 6 and then connected to the neutral wire of the 220V AC power supply.

[0032] The working process of the above signal detection module, logic control circuit, and execution drive circuit is as follows: When the water level in the inner tank 2 is lower than the lower float ball 12, the magnet embedded in the lower float ball 12 moves away from its corresponding Hall sensor. The Hall sensor outputs a high-level signal, which is transmitted to the base of the second NPN transistor through the first current-limiting resistor to make it conduct, thereby driving the solid-state relay control terminal to be energized, and the heating tube 6 is de-energized and stops working. As the water level rises and gradually submerges the float 12, the presence of water changes the magnetic field distribution between the magnet and the Hall sensor. The Hall sensor outputs a low-level signal, the second NPN transistor is turned off, the solid-state relay is disconnected, and the heating tube 6 resumes power-on heating. When the water level continues to rise below the upper float 11, the magnet inside the upper float 11 moves away from its Hall sensor, outputs a high-level signal to trigger the first NPN transistor to conduct, the coil of the valve drive relay is energized, and its normally open contact closes to open the solenoid valve to inject water. When the water level completely covers the float 11, the distance between the magnet and the Hall sensor shortens, causing a change in the magnetic field strength. The Hall sensor outputs a low-level signal, the first NPN transistor is turned off, the relay coil is de-energized and the contacts open, and the solenoid valve closes to stop water intake.

[0033] The process achieves segmented water level control through dual float magnetic coupling detection. The Hall signals of the upper and lower floats 12 act independently on the heating tube 6 and the solenoid valve, forming a closed-loop water level regulation.

[0034] Preferably, it also includes several temperature sensors. Several mounting holes 14 are provided on the outer casing 1 located below the hydrophobic plate 13, spaced apart along its length. The temperature sensors are installed in the mounting holes 14 and are used to detect the water temperature below the hydrophobic plate 13. When the temperature sensor reports that the water temperature is lower than the set temperature, the heating tube 6 works; otherwise, it stops working.

[0035] The system includes two temperature sensors, designated as a first temperature sensor and a second temperature sensor. These sensors, along with an adder, form a temperature detection module. The outputs of both sensors are connected to the input of the adder, which in turn is connected to the input of a voltage comparator module. The system also includes a temperature setting module, a voltage comparator module, a power drive module, a status indicator module, and a power supply module. The output of the temperature detection module is connected to the non-inverting input of the voltage comparator module. The output of the temperature setting module is connected to the inverting input of the voltage comparator module. The output of the voltage comparator module is simultaneously connected to the control terminal of the power drive module and the input of the status indicator module. The load terminal of the power drive module is connected in series with a heating element 6 and then to an AC power supply. The ground terminal is grounded. The power supply module provides DC power to the temperature detection module, temperature setting module, and voltage comparator module, and provides isolated AC power to the power drive module.

[0036] The temperature setting module includes a potentiometer. The first fixed terminal of the potentiometer is connected to a DC power supply, the second fixed terminal of the potentiometer is grounded through a current-limiting resistor, and the sliding terminal of the potentiometer is connected to the inverting input terminal of the voltage comparison module.

[0037] The voltage comparison module includes an LM358 operational amplifier, a MOSFET, a first resistor, and a second resistor. The non-inverting input of the LM358 operational amplifier is connected to the output of the temperature detection module, and the inverting input of the LM358 operational amplifier is connected to the output of the temperature setting module. The output of the LM358 operational amplifier is connected to the gate of the MOSFET through the first resistor, and the output of the LM358 operational amplifier is fed back to its inverting input through the second resistor. The positive power supply terminal of the LM358 operational amplifier is connected to a DC power supply, and the negative power supply terminal of the LM358 operational amplifier is grounded.

[0038] The power drive module includes a MOSFET and a second freewheeling diode. The MOSFET is an N-channel diode. The drain of the MOSFET is connected in series with the heating element 6 and then connected to the AC power supply. The source of the MOSFET is grounded. The anode of the second freewheeling diode is connected to the drain of the MOSFET, and the cathode of the second freewheeling diode is connected to the positive terminal of the AC power supply.

[0039] The status indicator module includes an LED light. The anode of the LED light is connected to the output terminal of the voltage comparison module through a limiting resistor, and the cathode of the LED light is grounded.

[0040] The working process of the temperature detection module, temperature setting module, voltage comparison module, power drive module, status indication module, and power supply module is as follows: When the temperature inside the inner liner 2 changes, the two temperature sensors in the temperature detection module output voltage signals respectively. After the two signals are arithmetically averaged by the adder, a voltage signal representing the current average temperature is formed and input to the non-inverting input of the LM358 operational amplifier in the voltage comparison module. Meanwhile, the temperature setting module generates an adjustable setting voltage through a potentiometer voltage divider, which is input to the inverting input of the LM358 operational amplifier. When the average temperature voltage is lower than the setting voltage, the output of the LM358 operational amplifier outputs a high level, driving the gate of the MOS transistor in the power drive module to conduct, so that the 24V AC power supply forms a circuit through the heating tube 6 and heats it. At the same time, the LED of the status indicator module lights up. When the average temperature voltage exceeds the set voltage, the LM358 operational amplifier outputs a low level, the MOSFET turns off, the heating element 6 stops working, and the LED turns off. The LM358 operational amplifier generates a hysteresis temperature of about 0.5°C through the hysteresis feedback resistor to avoid frequent switching at the critical temperature. The power module supplies power to the control circuit through a 12V DC power supply and drives the heating element 6 through an isolated 24V AC power supply.

[0041] In this way, the output water temperature of this heater is controlled, and heating is controlled when the temperature is below the set temperature, and heating is stopped when the temperature is above the set temperature.

[0042] Preferably, the upper outer ring of the inner liner 2 is connected to an overflow port 8 that penetrates the outer shell 1, and the horizontal height of the overflow port 8 is greater than the horizontal height of the inlet 3.

[0043] By setting an overflow port 8, when there is too much water in the inner tank 2, it can be discharged through the overflow port 8, thus avoiding excessive water volume.

[0044] Preferably, the outer ring of the outer casing 1 is fixedly connected to a mounting plate 7.

[0045] The mounting plate 7 is designed so that the entire heater structure is not affected by the shape of the outer shell 1 and is not difficult to install.

[0046] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A counter-current rapid heating heater, characterized in that, The inner liner (2) includes an outer shell (1) fixedly connected to its outer side. The upper and lower outer rings of the inner liner (2) are respectively connected to the water inlet (3) and the water outlet (4) that penetrate the outer shell (1) to the outside. The water inlet can be opened and closed. A drainage plate (13) is provided inside the inner liner (2) between the water inlet (3) and the water outlet (4). The drainage plate (13) has several uniformly arranged sieve holes that penetrate it.

2. The counter-current rapid heating heater according to claim 1, characterized in that, The lower end of the inner liner (2) is fixedly connected to a fixed flange (5), and a heating pipe (6) located inside the inner liner (2) and below the hydrophobic plate (13) is fixedly connected to the fixed flange (5). The upper end of the inner liner (2) is fixedly connected to a fixed plate (9), and the fixed plate (9) is fixedly connected to an upper float (11) and a lower float (12) via a fixed connecting rod (10).

3. A counter-current rapid heating heater according to claim 2, characterized in that, The inlet is connected to a solenoid valve to enable it to be opened and closed. When the upper float (11) provides feedback that the water level in the inner tank (2) is lower than the upper float (11), the solenoid valve opens; otherwise, the solenoid valve closes. When the lower float (12) provides feedback that the water level in the inner tank (2) is lower than the lower float (12), the heating tube (6) stops working.

4. A counter-current rapid heating heater according to claim 2, characterized in that, It also includes several temperature sensors. The housing (1) located below the hydrophobic plate (13) has several mounting holes (14) spaced apart along its length. The temperature sensors are installed in the mounting holes (14) and are used to detect the water temperature below the hydrophobic plate (13). When the temperature sensor reports that the water temperature is lower than the set temperature, the heating tube (6) works, otherwise it stops working.

5. A counter-current rapid heating heater according to claim 1, characterized in that, The upper outer ring of the inner liner (2) is connected to an overflow port (8) that penetrates the outer shell (1), and the horizontal height of the overflow port (8) is greater than the horizontal height of the inlet (3).

6. A counter-current rapid heating heater according to claim 1, characterized in that, The outer ring of the outer shell (1) is fixedly connected to a mounting plate (7).

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