Control device of electromagnetic valve, water treatment device and gas cooker

Abstract

The invention provides a control device of an electromagnetic valve, a water treatment device and a gas cooker, the control device of the electromagnetic valve comprises a control circuit, the output end of the control circuit is used for outputting a first waveform signal of a first frequency; the input end of the return difference circuit is connected with the output end of the control circuit, the return difference circuit is used for processing the first waveform signal of the first frequency to obtain a driving signal, and the driving signal comprises a second waveform signal of the first frequency and a third waveform signal of the second frequency; the input end of the driving circuit is connected with the output end of the return difference circuit, the output end of the driving circuit is connected with the electromagnetic valve, and the driving circuit is used for driving the electromagnetic valve to operate according to the driving signal.

Description

Technical Field

[0001] The present invention relates to the technical field of circuits, and in particular to a control device for a solenoid valve, a water treatment device and a gas cooker. Background Art

[0002] The solenoid valve is a valve body that can control the opening and closing.

[0003] In the control process, the control circuit outputs a square wave signal, and the solenoid valve driving circuit drives the solenoid valve to work according to the square wave signal.

[0004] However, in the above control scheme, the waveform of the hysteresis signal of the hysteresis curve of the controlled solenoid valve is relatively large, so that the solenoid valve cannot be linearly controlled, and the control accuracy of the device where the solenoid valve is located is relatively low.

[0005] For example, in a water heater using the above control scheme, since the waveform of the hysteresis signal of the hysteresis curve of the controlled solenoid valve is relatively large, the outlet water temperature of the water heater is fluctuating between cold and hot, and the outlet water temperature is unstable. Summary of the invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0007] To this end, a first aspect of the present invention is to provide a control device for a solenoid valve.

[0008] A second aspect of the present invention provides a water treatment device.

[0009] A third aspect of the present invention provides a gas cooker.

[0010] In view of this, according to the first aspect of the present invention, the present invention provides a control device for a solenoid valve, comprising: a control circuit, wherein the output end of the control circuit is used to output a first waveform signal of a first frequency; a hysteresis circuit, wherein the input end of the hysteresis circuit is connected to the output end of the control circuit, 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, 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.

[0011] In this technical solution, a control device for a solenoid valve is proposed. The control device includes a control circuit, a hysteresis circuit and a drive circuit.

[0012] Among them, the control circuit outputs a first waveform signal of a first frequency so as to serve as a control signal for driving the solenoid valve. The first waveform signal of the first frequency is processed by a set hysteresis circuit to obtain a driving signal. At this time, the driving circuit uses the driving signal to realize the driving control of the solenoid valve.

[0013] 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.

[0014] 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.

[0015] In some technical solutions, optionally, the hysteresis circuit mainly compares the input signal with the reference signal to obtain the output signal. The working principle of the hysteresis circuit is based on the principle of negative feedback, which reduces the difference between the input signal and the reference signal by feeding back a part of the output signal to the input end, making the output signal more stable.

[0016] In some technical solutions, optionally, the hysteresis circuit can be selected and constructed based on the first frequency, the first waveform signal, the second frequency, the second waveform signal, and the third waveform signal.

[0017] In some technical solutions, optionally, the first frequency can be 1KHz, or other frequencies, such as 1.5KHz, or other frequencies. The value can be determined according to actual usage needs and will not be further described here.

[0018] In some technical solutions, optionally, the second frequency can select parameters of various components in the hysteresis circuit according to actual use needs, so as to obtain a third frequency that meets user needs.

[0019] In some technical solutions, optionally, the second frequency may be the same as or different from the first frequency.

[0020] In some technical solutions, optionally, the control circuit may be a control chip.

[0021] In some technical solutions, optionally, the driving circuit can be selected according to the controlled solenoid valve, and its specific selection will not be described in detail here.

[0022] In addition, the control device of the solenoid valve proposed in this application also has the following additional technical features.

[0023] In some technical schemes, optionally, 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.

[0024] Normally, the solenoid valve is driven and controlled by a square wave signal. In the technical solution of the present application, the first waveform signal and the second waveform signal are limited to square waves so that the control device of the solenoid valve proposed in the present application can be adapted to the current solenoid valves, thereby broadening the applicable scenarios of the technical solution of the present application.

[0025] In the above technical solution, 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.

[0026] In the above technical solution, 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.

[0027] At the same time, in the above technical solution, the control difficulty of the solenoid valve can also be reduced.

[0028] In some technical solutions, optionally, at the same time, 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.

[0029] In this technical solution, 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 to achieve the control of the solenoid valve.

[0030] In some technical schemes, optionally, 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.

[0031] In the above technical solution, the resistance values ​​of the first resistor, the second resistor, and the third resistor, and the capacitance values ​​of the first capacitor and the second capacitor 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.

[0032] According to a second aspect of the present invention, the present invention provides a water treatment device, comprising a solenoid valve; and a control device for the solenoid valve as any one of the above.

[0033] In this technical solution, a water treatment device is proposed. The water treatment device includes the solenoid valve as described above and a corresponding solenoid valve control device. Therefore, the device has all the beneficial technical effects of the solenoid valve control device as described above, which will not be described in detail here.

[0034] In some technical solutions, optionally, the solenoid valve includes a water outlet valve.

[0035] In this technical solution, when the solenoid valve is a water outlet valve, the water outlet valve can achieve stable water outlet and reduce fluctuations in water outlet, thereby improving the user's water use experience.

[0036] In some technical solutions, optionally, the water treatment device includes a gas water heater.

[0037] In some technical solutions, optionally, the solenoid valve includes a gas proportional valve of a gas water heater.

[0038] In this technical solution, 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.

[0039] According to a third aspect of the present invention, the present invention provides a gas cooker, comprising: a solenoid valve; and a control device for the solenoid valve as described in any one of the above.

[0040] In this technical solution, a gas cooker is proposed. The gas cooker includes the solenoid valve and a corresponding solenoid valve control device as described above. Therefore, the gas cooker has all the beneficial technical effects of the solenoid valve control device described above, which will not be described in detail here.

[0041] In some technical solutions, optionally, the solenoid valve includes a gas proportional valve.

[0042] In this technical solution, the solenoid valve can be a gas proportional valve. During this process, it can ensure that the gas in the gas stove can burn stably, thereby providing stable heat and ensuring the cooking effect of the stove.

[0043] Additional aspects and advantages of the invention will be set forth in part in the following description and in part will be obvious from the following description, or may be learned by practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0045] Figure 1 A topological schematic diagram of a control device for a solenoid valve in an embodiment of the present application is shown;

[0046] Figure 2 A waveform comparison diagram of a hysteresis signal in a hysteresis curve of an embodiment of the present invention and a related art is shown;

[0047] Figure 3 A schematic diagram showing a second waveform signal of a first frequency and a third waveform signal of a second frequency in an embodiment of the present invention is shown.

[0048] in, Figure 1 The corresponding relationship between the reference numerals and the component names is as follows:

[0049] 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

[0050] In order to more clearly understand the above aspects, features and advantages of the present invention, the present invention 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 in the embodiments can be combined with each other without conflict.

[0051] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0052] In one embodiment of the present application, Figure 1 and Figure 2As shown, 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.

[0053] 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 .

[0054] 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.

[0055] 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 to work. Under the control of the driving signal, the hysteresis curve of the solenoid valve 108 will change.

[0056] The hysteresis curve of the solenoid valve is measured by an ammeter and a barometer to obtain the waveform of the hysteresis signal, such as Figure 2 As shown, 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.

[0057] In this case, the opening variation 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.

[0058] In some embodiments, optionally, the hysteresis circuit 104 mainly compares the input signal with the reference signal to obtain the output signal. The working principle of the hysteresis circuit 104 is based on the principle of negative feedback, which reduces the difference between the input signal and the reference signal by feeding back a part of the output signal to the input end, so that the output signal is more stable.

[0059] In some embodiments, optionally, the hysteresis circuit 104 may be selected and constructed according to a first frequency, a first waveform signal, a second frequency, a second waveform signal, and a third waveform signal.

[0060] In some embodiments, optionally, the first frequency can be 1 KHz, or other frequencies, such as 1.5 KHz, or other frequencies. The value can be determined according to actual usage needs and will not be further described here.

[0061] In some embodiments, optionally, the second frequency is 100 Hz, 150 Hz, or other values.

[0062] In some embodiments, optionally, the second frequency can select parameters of various components in the hysteresis circuit 104 according to actual use needs, so as to obtain a third frequency that meets user needs.

[0063] In some embodiments, optionally, the second frequency may be the same as or different from the first frequency.

[0064] In some embodiments, the control circuit 102 may optionally be a control chip.

[0065] In some embodiments, optionally, the drive circuit 106 can be selected according to the controlled solenoid valve, and its specific selection will not be described in detail here.

[0066] In some embodiments, Figure 3 As shown, optionally, 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.

[0067] 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 embodiments of the present application.

[0068] 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.

[0069] 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.

[0070] At the same time, in the above embodiment, the control difficulty of the solenoid valve can also be reduced.

[0071] In some embodiments, optionally, at the same time, 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.

[0072] 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 achieve the control of the solenoid valve.

[0073] In some embodiments, optionally, the hysteresis circuit 104 includes: a first resistor R1; a second resistor R2, wherein the first end of the second resistor R2 is connected to the output end of the control circuit 102, and the second end of the second resistor R2 is connected to the first end of the first resistor R1; a third resistor R3, wherein the first end of the third resistor R3 is connected to the second end of the first resistor R1, and the second end of the third resistor R3 is grounded; a first capacitor C1, wherein the first end of the first capacitor C1 is connected to the input end of the drive circuit 106, and the second end of the first capacitor C1 is connected to the first end of the third resistor R3; a second capacitor C2, wherein the first end of the second capacitor C2 is connected to the first end of the first resistor R1, and the second end of the second capacitor C2 is connected to the second end of the third resistor R3.

[0074] In the above embodiments, 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.

[0075] In some embodiments, the present invention provides a water treatment device, including a solenoid valve 108; a control device for the solenoid valve as any one of the above.

[0076] In this embodiment, a water treatment device is provided. The water treatment device includes the solenoid valve as described above and a corresponding solenoid valve control device, wherein the solenoid valve control device includes a control circuit, a hysteresis circuit and a drive circuit.

[0077] Among them, the control circuit outputs a first waveform signal of a first frequency so as to serve as a control signal for driving the solenoid valve. The first waveform signal of the first frequency is processed by a set hysteresis circuit to obtain a driving signal. At this time, the driving circuit uses the driving signal to realize the driving control of the solenoid valve.

[0078] 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.

[0079] 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.

[0080] In some embodiments, optionally, the solenoid valve comprises a water outlet valve.

[0081] In this embodiment, when the solenoid valve is a water outlet valve, the water outlet valve can achieve stable water outlet and reduce fluctuations in water outlet, thereby improving the user's water use experience.

[0082] In some embodiments, optionally, the water treatment device includes a gas water heater.

[0083] In some embodiments, optionally, the solenoid valve comprises a gas proportional valve of a gas water heater.

[0084] 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.

[0085] In some embodiments, the present invention provides a gas cooker, comprising: a solenoid valve 108; and a control device for the solenoid valve as described in any one of the above.

[0086] 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.

[0087] In some embodiments, the solenoid valve 108 optionally comprises a gas proportional valve.

[0088] In this embodiment, the solenoid valve may be a gas proportional valve. During this process, it can ensure that the gas in the gas cooker can burn stably, thereby providing stable heat and ensuring the cooking effect of the cooker.

[0089] The term "first" or "second" in the specification and claims of the present application may include one or more of the features explicitly or implicitly. In the textual description of the present invention, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0090] In the claims, specification and drawings of the present invention, the term "multiple" refers to two or more than two. Unless otherwise clearly defined, the orientation or position relationship indicated by the terms "upper" and "lower" is based on the orientation or position relationship shown in the drawings, which is only for the purpose of more conveniently describing the present invention and making the description process simpler, rather than indicating or implying that the device or element referred to must have the specific orientation described, be constructed and operated in a specific orientation, so these descriptions cannot be understood as limiting the present invention; the terms "connect", "install", "fix" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection between multiple objects, or 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 of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood based on the specific circumstances of the above data.

[0091] In the claims, specification and drawings of the present invention, the description of the terms "one embodiment", "some embodiments", "specific embodiments" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In the claims, specification and drawings of the present invention, the 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 one or more embodiments or examples in a suitable manner.

[0092] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A control device for a solenoid valve, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: The solenoid valve comprises a water outlet valve.

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

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

9. A gas cooker, characterized in that: 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, characterized in that: The solenoid valve comprises a gas proportional valve.

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