Control apparatus for solenoid valve, and water treatment apparatus, and gas stove

Abstract

Disclosed is a control apparatus for a solenoid valve. The control apparatus comprises: a control circuit (102), wherein an output end of the control circuit (102) is used for outputting a first waveform signal of a first frequency; a hysteresis circuit (104), wherein an input end of the hysteresis circuit (104) is connected to the output end of the control circuit (102) and used for processing the first waveform signal of the first frequency, so as to obtain a drive signal, which drive signal comprises a second waveform signal of the first frequency and a third waveform signal of a second frequency; and a drive circuit (106), wherein an input end of the drive circuit (106) is connected to an output end of the hysteresis circuit (104), an output end of the drive circuit (106) is connected to a solenoid valve (108) and the drive circuit is used for driving, on the basis of the drive signal, the solenoid valve (108) to operate. Under the control of a drive signal, compared to directly using a first waveform signal of a first frequency to drive a drive circuit, the waveform of a hysteresis signal in a hysteresis curve of a solenoid valve is significantly reduced; the change in the degree of opening of the solenoid valve when the solenoid valve is controlled is more linear, such that the solenoid valve is controlled more finely; and the problem of the temperature of outgoing water fluctuating greatly can be solved, thereby improving the stability of the temperature of the outgoing water. Further disclosed are a water treatment apparatus using the control apparatus, and a gas stove.

Description

Solenoid valve control device, water treatment device and gas cooker

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on July 20, 2023, with application number "202310894913.1" and titled "Control device for solenoid valve, water treatment device and gas cooker", the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of circuit technology, and in particular to a solenoid valve control device, a water treatment device, and a gas cooker. Background Art

[0003] A solenoid valve is a valve body that can control the opening and closing of the valve.

[0004] During the control process, the control circuit outputs a square wave signal, and the solenoid valve drive circuit drives the solenoid valve to work according to the square wave signal.

[0005] However, in the above control scheme, the waveform of the hysteresis signal of the hysteresis curve of the controlled solenoid valve is relatively large, which makes it impossible to achieve linear control of the solenoid valve, resulting in relatively low control accuracy of the device where the solenoid valve is located.

[0006] For example, in a water heater using the above control scheme, the outlet water temperature of the water heater may be unstable due to the large waveform of the hysteresis signal of the hysteresis curve of the controlled solenoid valve.

[0007] Summary of the Invention

[0008] This application aims to solve at least one of the technical problems existing in the prior art or related art.

[0009] To this end, a first aspect of the present application is to provide a control device for a solenoid valve.

[0010] A second aspect of the present application is to provide a water treatment device.

[0011] A third aspect of the present application is to provide a gas cooker.

[0012] In view of this, according to the first aspect of the present application, the present application provides a control device for an electromagnetic valve, comprising: a control circuit, the output end of the control circuit is used to output a first waveform signal of a first frequency; a hysteresis circuit, the input end of the hysteresis circuit is connected to the output end of the control circuit, for processing the first waveform signal of the first frequency to obtain a drive signal, the drive signal including a second waveform signal of the first frequency and a third waveform signal of the second frequency; a drive circuit, the input end of the drive circuit is connected to the output end of the hysteresis circuit, the output end of the drive circuit is connected to the electromagnetic valve, for driving the electromagnetic valve to operate according to the drive signal.

[0013] In some technical solutions, the first waveform signal and the second waveform signal are square waves, and the third waveform signal is a sine wave; wherein the first level in the second waveform signal remains constant, and the waveform formed by the second level value in the second waveform signal follows the waveform of the third waveform signal.

[0014] In some technical solutions, at the same moment, the value of the third waveform signal is a third level, the value of the second level is a fourth level, and the level value of the driving signal is the sum of the fourth level and the third level.

[0015] In some technical solutions, the hysteresis circuit includes: a first resistor; a second resistor, a first end of the second resistor is connected to the output end of the control circuit, and the second end of the second resistor is connected to the first end of the first resistor; a third resistor, a first end of the third resistor is connected to the second end of the first resistor, and the second end of the third resistor is grounded; a first capacitor, a first end of the first capacitor is connected to the input end of the drive circuit, and the second end of the first capacitor is connected to the first end of the third resistor; a second capacitor, a first end of the second capacitor is connected to the first end of the first resistor, and the second end of the second capacitor is connected to the second end of the third resistor.

[0016] According to a second aspect of the present application, the present application provides a water treatment device, including a solenoid valve; and a control device for the solenoid valve as described above.

[0017] In some technical solutions, the solenoid valve includes a water outlet valve.

[0018] In some technical solutions, the water treatment device includes a gas water heater.

[0019] In some technical solutions, the solenoid valve includes a gas proportional valve of a gas water heater.

[0020] According to a third aspect of the present application, the present application provides a gas cooker, comprising: a solenoid valve; and a control device for the solenoid valve as described in any one of the above.

[0021] In some technical solutions, the solenoid valve includes a gas proportional valve.

[0022] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] FIG1 shows a topological schematic diagram of a control device for a solenoid valve in an embodiment of the present application;

[0025] FIG2 is a waveform comparison diagram of the hysteresis signal in the hysteresis curve of the embodiment of the present application and the related art;

[0026] FIG3 shows a schematic diagram of a second waveform signal of a first frequency and a third waveform signal of a second frequency in an embodiment of the present application.

[0027] 1 , the corresponding relationship between the reference numerals and component names is as follows: 102 control circuit, 104 hysteresis circuit, 106 drive circuit, C1 first capacitor, C2 second capacitor, R1 first resistor, R2 second resistor, R3 third resistor, 108 solenoid valve. DETAILED DESCRIPTION

[0028] In order to more clearly understand the above aspects, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other in the absence of conflict.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0030] In one embodiment of the present application, as shown in Figures 1 and 2, a control device for a solenoid valve is provided, including: a control circuit 102, wherein the output end of the control circuit 102 is used to output a first waveform signal of a first frequency; a hysteresis circuit 104, wherein the input end of the hysteresis circuit 104 is connected to the output end of the control circuit 102, and is used to process the first waveform signal of the first frequency to obtain a drive signal, wherein the drive signal includes a second waveform signal of the first frequency and a third waveform signal of the second frequency; a drive circuit 106, wherein the input end of the drive circuit 106 is connected to the output end of the hysteresis circuit 104, and the output end of the drive circuit 106 is connected to the solenoid valve 108, and is used to drive the solenoid valve 108 to operate according to the drive signal.

[0031] In this embodiment, a control device for a solenoid valve is provided. The control device includes a control circuit 102 , a hysteresis circuit 104 , and a drive circuit 106 .

[0032] Among them, the control circuit 102 outputs a first waveform signal of a first frequency to serve as a control signal for driving the solenoid valve. The hysteresis circuit 104 is used to process the first waveform signal of the first frequency to obtain a driving signal. At this time, the driving circuit 106 uses the driving signal to realize the driving control of the solenoid valve.

[0033] In the above embodiment, the driving signal is used to replace the first waveform signal of the first frequency to update the control signal for driving the solenoid valve 108. Under the control of the driving signal, the hysteresis curve of the solenoid valve 108 will change.

[0034] The hysteresis curve of the solenoid valve is measured using an ammeter and a barometer to obtain the waveform of the hysteresis signal, as shown in FIG2 . Compared with directly using the first waveform signal of the first frequency to drive the driving circuit 106 , the waveform of the hysteresis signal in the hysteresis curve of the solenoid valve is significantly reduced.

[0035] In this case, the opening change of the solenoid valve 108 when controlled is more linear, and the control device using the above-mentioned solenoid valve control device is more precisely controlled. For example, the water heater in the above-mentioned embodiment can improve the problem of large fluctuations in the outlet water temperature and improve the stability of the outlet water temperature.

[0036] In some embodiments, the hysteresis circuit 104 primarily compares an input signal with a reference signal to generate an output signal. The hysteresis circuit 104 operates based on the principle of negative feedback, feeding a portion of the output signal back to the input terminal to reduce the difference between the input signal and the reference signal, thereby making the output signal more stable.

[0037] In some implementations, the hysteresis circuit 104 may be selected and constructed based on a first frequency, a first waveform signal, a second frequency, a second waveform signal, and a third waveform signal.

[0038] In some implementations, the first frequency may be 1 KHz, or other frequencies, such as 1.5 KHz, or other frequencies. The value may be determined based on actual usage needs and will not be further described here.

[0039] In some embodiments, the second frequency is 100 Hz, 150 Hz, or other values.

[0040] In some implementations, the second frequency can be selected based on the parameters of the components in the hysteresis circuit 104 according to actual usage needs, so as to obtain a third frequency that meets user needs.

[0041] In some embodiments, the second frequency may be the same as or different from the first frequency.

[0042] In some embodiments, the control circuit 102 may be a control chip.

[0043] In some implementations, the drive circuit 106 may be selected based on the controlled solenoid valve, and its specific selection will not be further described here.

[0044] In some embodiments, as shown in FIG3 , the first waveform signal and the second waveform signal are square waves, and the third waveform signal is a sine wave; wherein the first level in the second waveform signal remains constant, and the waveform formed by the second level value in the second waveform signal follows the waveform of the third waveform signal.

[0045] Normally, the solenoid valve is driven and controlled by a square wave signal. In the embodiment of the present application, by limiting the first waveform signal and the second waveform signal to square waves, the control device of the solenoid valve proposed in the present application can be adapted to the current solenoid valve, thereby broadening the applicable scenarios of the embodiment of the present application.

[0046] In the above embodiment, the first level is the low level of the square wave signal, and the second level is the high level of the square wave signal.

[0047] In the above embodiment, the waveform following is limited to ensure that the driving signal can exist in a periodically changing form, so that when the state of the solenoid valve needs to be controlled to remain unchanged, it can be achieved through the driving signal.

[0048] At the same time, in the above embodiment, the control difficulty of the solenoid valve can also be reduced.

[0049] In some embodiments, at the same time, the value of the third waveform signal is the third level, the value of the second level is the fourth level, and the level value of the driving signal is the sum of the fourth level and the third level.

[0050] In this embodiment, the expression of the level value of the driving signal is limited. In this process, when the second waveform signal of the first frequency and the third waveform signal of the second frequency are determined, the driving signal can be directly calculated to realize the driving of the driving circuit 106 to realize the control of the solenoid valve.

[0051] In some embodiments, the hysteresis circuit 104 includes: a first resistor R1; a second resistor R2, wherein a first end of the second resistor R2 is connected to the output end of the control circuit 102, and a second end of the second resistor R2 is connected to the first end of the first resistor R1; a third resistor R3, wherein a first end of the third resistor R3 is connected to the second end of the first resistor R1, and a second end of the third resistor R3 is grounded; a first capacitor C1, wherein a first end of the first capacitor C1 is connected to the input end of the driving circuit 106, and a second end of the first capacitor C1 is connected to the first end of the third resistor R3; and a second capacitor C2, wherein a first end of the second capacitor C2 is connected to the first end of the first resistor R1, and a second end of the second capacitor C2 is connected to the second end of the third resistor R3.

[0052] In the above embodiment, the resistance values ​​of the first resistor R1, the second resistor R2, and the third resistor R3, and the capacitance values ​​of the first capacitor C1 and the second capacitor C2 can be selected according to the first frequency, the first waveform signal, the second frequency, the second waveform signal, and the third waveform signal, which will not be repeated here.

[0053] In some embodiments, the present application provides a water treatment device, including a solenoid valve 108; a control device for the solenoid valve as described above.

[0054] In this embodiment, a water treatment device is provided. The water treatment device includes the above-mentioned solenoid valve and a corresponding solenoid valve control device, wherein the solenoid valve control device includes a control circuit, a hysteresis circuit, and a drive circuit.

[0055] Among them, the control circuit outputs a first waveform signal of a first frequency to serve as a control signal for driving the solenoid valve. The set hysteresis circuit is used to process the first waveform signal of the first frequency to obtain a driving signal. At this time, the driving circuit uses the driving signal to realize the driving control of the solenoid valve.

[0056] In the above technical solution, a driving signal is used to replace the first waveform signal of the first frequency to realize the update of the control signal for driving the solenoid valve. Under the control of the driving signal, the hysteresis curve of the solenoid valve will change. Compared with directly using the first waveform signal of the first frequency to drive the driving circuit, the waveform of the hysteresis signal in the hysteresis curve of the solenoid valve is significantly reduced.

[0057] In this case, the opening change of the solenoid valve when it is controlled is more linear, and the control device using the above-mentioned solenoid valve control device is more precise. For example, the water heater of the above-mentioned technical solution can improve the problem of large fluctuations in the outlet water temperature and improve the stability of the outlet water temperature.

[0058] In some embodiments, the solenoid valve comprises a water outlet valve.

[0059] In this embodiment, when the solenoid valve is a water outlet valve, the water outlet valve can achieve stable water outlet, reduce fluctuations in water outlet, and thereby improve the user's water use experience.

[0060] In some embodiments, the water treatment device comprises a gas water heater.

[0061] In some embodiments, the solenoid valve comprises a gas proportional valve of a gas water heater.

[0062] In this embodiment, the solenoid valve can be a gas proportional valve. During this process, it can ensure that the gas in the gas water heater can burn stably, thereby providing stable heat, improving the problem of large fluctuations in the outlet water temperature, and improving the stability of the outlet water temperature.

[0063] In some embodiments, the present application provides a gas cooker, including: a solenoid valve 108; and a control device for the solenoid valve as described above.

[0064] In this embodiment, a gas cooker is proposed. The gas cooker includes the above-mentioned solenoid valve and a corresponding solenoid valve control device. Therefore, the gas cooker has all the beneficial technical effects of the above-mentioned solenoid valve control device, which will not be described in detail here.

[0065] In some embodiments, the solenoid valve 108 comprises a gas proportioning valve.

[0066] In this embodiment, the solenoid valve may be a gas proportional valve, which can ensure that the gas in the gas cooker can burn stably during this process, thereby providing stable heat and ensuring the cooking effect of the cooker.

[0067] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly refer to one or more of the features. In the text of this application, unless otherwise specified, "plurality" means two or more. Furthermore, "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the connected objects.

[0068] In the textual description of the present application, it can be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description of the embodiments of the present application, rather than indicating or implying that the structures, devices, and elements referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, these descriptions cannot be understood as limiting the present application.

[0069] In the claims, specification and drawings of this application, the term "plurality" refers to two or more. Unless otherwise expressly defined, the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. They are intended only to more conveniently describe this application and simplify the description process, and are not intended to indicate or imply that the device or element referred to must have the specific orientation described, be constructed and operated in a specific orientation. Therefore, these descriptions should not be understood as limiting this application. The terms "connect," "install," and "fix" should be understood in a broad sense. For example, "connection" can be a fixed connection between multiple objects, a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects, or an indirect connection between multiple objects through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this application can be understood based on the specific circumstances of the above data.

[0070] In the claims, specification, and drawings of this application, the terms "one embodiment," "some embodiments," "a specific embodiment," and the like mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of this application. In the claims, specification, and drawings of this application, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0071] The above are merely exemplary embodiments of the present application and are not intended to limit the present application. Persons skilled in the art will readily appreciate that various modifications and variations of the present application are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A control device for a solenoid valve, wherein: include: A control circuit, wherein an output end of the control circuit is used to output a first waveform signal of a first frequency; a hysteresis circuit, wherein an input end of the hysteresis circuit is connected to an output end of the control circuit, and is used for processing the first waveform signal of the first frequency to obtain a drive signal, wherein the drive signal includes a second waveform signal of the first frequency and a third waveform signal of the second frequency; A drive circuit, wherein the input end of the drive circuit is connected to the output end of the hysteresis circuit, and the output end of the drive circuit is connected to the solenoid valve, and is used to drive the solenoid valve to operate according to the drive signal.

2. The control device according to claim 1, wherein: The first waveform signal and the second waveform signal are square waves, and the third waveform signal is a sine wave; The first level in the second waveform signal remains constant, and a waveform formed by the second level value in the second waveform signal follows the waveform of the third waveform signal.

3. The control device according to claim 2, wherein: At the same time, the value of the third waveform signal is the third level, the value of the second level is the fourth level, and the level value of the driving signal is the sum of the fourth level and the third level.

4. The control device according to any one of claims 1 to 3, wherein: The hysteresis circuit comprises: a first resistor; a second resistor, wherein a first end of the second resistor is connected to the output end of the control circuit, and a second end of the second resistor is connected to the first end of the first resistor; a third resistor, a first end of the third resistor being connected to the second end of the first resistor, and a second end of the third resistor being grounded; a first capacitor, wherein a first end of the first capacitor is connected to an input end of the driving circuit, and a second end of the first capacitor is connected to a first end of the third resistor; A second capacitor, wherein a first end of the second capacitor is connected to a first end of the first resistor, and a second end of the second capacitor is connected to a second end of the third resistor.

5. A water treatment device, wherein: include, Solenoid valve; A control device for a solenoid valve according to any one of claims 1 to 4.

6. The water treatment device according to claim 5, wherein: The solenoid valve comprises a water outlet valve.

7. The water treatment device according to claim 5, wherein: The water treatment device comprises a gas water heater.

8. The water treatment device according to claim 7, wherein: The solenoid valve includes a gas proportional valve of the gas water heater.

9. A gas cooker, wherein: include: Solenoid valve; A control device for a solenoid valve according to any one of claims 1 to 4.

10. The gas cooker according to claim 9, wherein: The solenoid valve comprises a gas proportional valve.

Images