Water level detection circuit of air conditioner water tank and mobile air conditioner

Abstract

The utility model discloses a water level detection circuit of an air conditioner water tank and a mobile air conditioner. The water level detection circuit comprises the air conditioner water tank, a trigger board, a touch spring, a direct-current voltage source and a control board. The groove in the bottom of the air conditioner water tank is connected with the control panel to form the cavity, and the touch spring and the trigger plate are arranged in the cavity, so that contact with air and water is reduced, the product structure space is optimized, oxidation and scale generation of the touch spring are prevented, and the service life of the water level detection circuit is prolonged; the touch spring outputs a detection signal to the control circuit, and the control circuit determines that the water pressure exists at the bottom of the air conditioner water tank and the water level of the air conditioner water tank changes according to the detection signal, so that it is determined that water exists in the air conditioner water tank, and the water detection function of the air conditioner water tank is achieved. A reed switch mechanical detection mode in the prior art is changed into an electronic detection mode, so that the accuracy and the stability of water detection are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water level detection, in particular to a water level detection circuit for an air-conditioning water tank and a mobile air-conditioning. Background Art

[0002] In the prior art, most mobile air conditioners use reed switches to detect water levels, and the reed switches are set in the water tank. When there is water in the water tank, the float of the magnet will float up. When it floats to the position near the reed switch, the reed switch switch will be energized, and the controller will detect a high level, which is equivalent to detecting the presence of water. On the contrary, when there is no water, the float will fall down and the reed switch will be disconnected. The controller will detect a low level, which is equivalent to detecting the absence of water. However, the reed switch is a mechanical switch. If it is energized many times and is immersed in the water tank for a long time, scale will be generated, resulting in failure of energization, and the cost of using the reed switch is relatively high. Utility Model Content

[0003] The purpose of the utility model is to provide a water level detection circuit for an air-conditioning water tank and a mobile air-conditioning, so as to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0004] The utility model solves the technical problem by providing a water level detection circuit for an air-conditioning water tank and a mobile air-conditioning.

[0005] In some embodiments of the first aspect of the utility model, a water level detection circuit of an air-conditioning water tank includes: an air-conditioning water tank, a trigger board, a touch spring, a DC voltage source and a control board;

[0006] The outer wall of the bottom of the air-conditioning water tank is connected to the control board, the bottom of the air-conditioning water tank is provided with a groove, the control board and the groove form a cavity, the touch spring and the trigger board are both arranged inside the cavity, a control circuit is provided on the control board, the touch spring is connected to the control circuit and the trigger board respectively, the top of the cavity is connected to the trigger board, and the DC voltage source is connected to the control circuit;

[0007] The trigger plate compresses the touch spring through the water pressure it receives, and the touch spring is deformed, outputting a detection signal to the control circuit. The control circuit is used to receive the detection signal to determine whether there is water in the air-conditioning water tank.

[0008] Furthermore, a detection circuit is also provided on the control board; the output end of the detection circuit is connected to the control circuit, and the input end of the detection circuit is connected to the touch spring.

[0009] Further, the detection circuit includes: an amplifier circuit and a detection resistor;

[0010] The input end of the amplifier circuit is connected to the detection resistor, the detection resistor is connected to the touch spring, and the output end of the amplifier circuit is connected to the control circuit.

[0011] Further, the control circuit includes: a control chip and a filter tank circuit;

[0012] The input end of the filtering energy storage circuit is connected to a DC voltage source, the output end of the filtering energy storage circuit is connected to a control chip, and the control chip is connected to the output end of the detection circuit.

[0013] Further, the filtering energy storage circuit includes: an energy storage capacitor, a first inductor and a filtering capacitor;

[0014] The DC voltage source is connected to one end of the first inductor, the energy storage capacitor and the filter capacitor are both connected to the other end of the first inductor, and the filter capacitor is connected to the control chip.

[0015] Furthermore, the top of the cavity and the trigger plate are integrated.

[0016] Furthermore, the upper surface of the trigger plate is connected to the inner wall of the top of the cavity.

[0017] Furthermore, the control chip is a SH79F326P control chip.

[0018] Furthermore, the air conditioning water tank is made of non-metallic material.

[0019] In some embodiments of the second aspect of the present utility model, a mobile air conditioner includes a water level detection circuit of an air conditioning water tank as in some embodiments of the first aspect of the present utility model.

[0020] The beneficial effects of the utility model are as follows: a cavity is formed by connecting the groove at the bottom of the air-conditioning water tank with the control board, and the touch spring and the trigger plate are arranged in the cavity to reduce contact with air and water, thereby optimizing the product structure space, preventing the touch spring from oxidizing and generating scale, and extending the service life of the water level detection circuit; the trigger plate is connected to the top of the cavity to withstand the water pressure at the bottom of the air-conditioning water tank, compressing the touch spring, and the touch spring outputs a detection signal to the control circuit. The control circuit determines through the detection signal that there is water pressure at the bottom of the air-conditioning water tank and the water level of the air-conditioning water tank changes, thereby determining that there is water inside the air-conditioning water tank, so as to realize the water detection function of the air-conditioning water tank, and the mechanical detection method of the reed switch in the prior art is changed to electronic detection, thereby improving the accuracy and stability of water detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a circuit diagram of a water level detection circuit for an air-conditioning water tank provided by an embodiment of the utility model;

[0022] Figure 2 It is a structural schematic diagram of a water level detection circuit of an air-conditioning water tank provided by an embodiment of the utility model;

[0023] Figure 3 It is a structural schematic diagram of a water level detection circuit of an air-conditioning water tank provided by another embodiment of the utility model.

[0024] Figure numerals: 100, air conditioning water tank, 110, cavity, 200, trigger board, 210, touch spring, 300, control board, 310, control circuit, 311, filter energy storage circuit, U1, control chip, EC1, energy storage capacitor, L1, first inductor, C1, filter capacitor, 320, detection circuit, 321, amplifier circuit, R1, detection resistor. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and cannot be understood as limiting the present utility model.

[0026] It should be noted that although the functional module division is performed in the schematic diagram, in some cases, the module division can be different from that in the system.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0029] Reference Figure 1 and Figure 2 In some embodiments of the first aspect of the utility model, a water level detection circuit 320 of an air-conditioning water tank includes: an air-conditioning water tank 100, a trigger board 200, a touch spring 210, a control board 300 and a DC voltage source.

[0030] The bottom of the air-conditioning water tank 100 is recessed inward to form a groove, and the board surface of the control board 300 is closely connected to the outer wall of the bottom of the air-conditioning water tank 100, so that the control board 300 is connected to the groove to form a cavity 110. A control circuit 310 is provided on the control board 300, and a DC voltage source is electrically connected to the control circuit 310, and the DC voltage source is used to power the circuit on the control board 300. The DC voltage source can output a DC voltage of 5V.

[0031] In this embodiment, the material of the air-conditioning water tank 100 is non-metallic material, that is, the air-conditioning water tank 100 can be a plastic water tank, a ceramic water tank or a rubber water tank, etc. In this utility model, no specific restrictions are made on the non-metallic material of the air-conditioning water tank 100.

[0032] When the air-conditioning water tank 100 is made of metal, the trigger plate 200 and the touch spring 210 are both disposed inside the air-conditioning water tank 100 , and the low-voltage grounding terminal and the high-voltage grounding terminal are connected through the metal air-conditioning water tank 100 .

[0033] The trigger plate 200 is installed inside the cavity 110. The top of the cavity 110 is connected to the trigger plate 200. The trigger plate 200 is located at the bottom of the air-conditioning water tank 100. The trigger plate 200 is used to withstand the water pressure generated at the bottom of the air-conditioning water tank 100. Under the action of the water pressure, the trigger plate 200 moves downward and compresses the touch spring 210.

[0034] The touch spring 210 is installed inside the cavity 110, one end of the touch spring 210 is connected to the trigger plate 200, and the other end of the touch spring 210 is connected to the control circuit 310. Under the compression of the trigger plate 200, the touch spring 210 is deformed, the trigger plate 200 can contact the control plate 300, and the touch spring 210 outputs a detection signal to the control circuit 310.

[0035] The control circuit 310 receives the detection signal, and determines through the detection signal that there is water pressure at the bottom of the air-conditioning water tank 100 , the water level of the air-conditioning water tank 100 changes, and determines that there is water inside the air-conditioning water tank 100 .

[0036] By connecting the groove at the bottom of the air-conditioning water tank 100 with the control board 300 to form a cavity 110, the touch spring 210 and the trigger board 200 are arranged in the cavity 110, thereby optimizing the product structure space, reducing contact with air, preventing the touch spring 210 from being oxidized, and reducing contact with water, preventing the touch spring 210 from generating scale, and extending the service life of the water level detection circuit 320. The trigger board 200 is connected to the top of the cavity 110 to withstand the water pressure at the bottom of the air-conditioning water tank 100, compressing the touch spring 210, and the touch spring 210 outputs a detection signal to the control circuit 310. The control circuit 310 determines through the detection signal that there is water pressure at the bottom of the air-conditioning water tank 100, and the water level of the air-conditioning water tank 100 changes, thereby determining that there is water inside the air-conditioning water tank 100, so as to realize the water detection function of the air-conditioning water tank 100.

[0037] The utility model utilizes the working principle of the touch spring 210 and the trigger plate 200 to detect whether there is water in the air-conditioning water tank 100. There is no need to set the reed switch inside the air-conditioning water tank 100, which simplifies the product structure and reduces hardware costs. It changes the mechanical detection method in the prior art to electronic detection, thereby enhancing the accuracy and stability of water level detection.

[0038] Reference Figure 1 and Figure 2 In some embodiments of the first aspect of the present utility model, a detection circuit 320 is also provided on the control board 300 .

[0039] An input end of the control circuit 310 is electrically connected to an output end of the detection circuit 320 , and the other end of the touch spring 210 is connected to an input end of the detection circuit 320 .

[0040] The detection circuit 320 includes: an amplifier circuit 321 and a detection resistor R1;

[0041] An input end of the amplifier circuit 321 is connected to one end of the detection resistor R1 , the other end of the detection resistor R1 is connected to the touch spring 210 , and an output end of the amplifier circuit 321 is electrically connected to an input end of the control circuit 310 .

[0042] Under the action of compression of the trigger plate 200, the touch spring 210 is deformed, resulting in a certain change in the charge of the capacitor in the touch spring 210. Through the amplifying circuit 321 and the detection resistor R1, the capacitance value detected by the control circuit 310 increases, that is, the control circuit 310 receives the detection signal, determines that there is water pressure at the bottom of the air-conditioning water tank 100, and the water level of the air-conditioning water tank 100 changes, and determines that there is water inside the air-conditioning water tank 100, so as to realize the water detection function of the air-conditioning water tank 100.

[0043] The amplifier circuit 321 may be composed of a transistor and a resistor. The detection signal is amplified by the amplifier circuit 321, and the amplified detection signal is output to the control circuit 310 for processing by the control circuit 310.

[0044] In this embodiment, the material of the air-conditioning water tank 100 is non-metallic material, that is, the air-conditioning water tank 100 can be a plastic water tank, a ceramic water tank or a rubber water tank, etc. In this utility model, no specific restrictions are made on the non-metallic material of the air-conditioning water tank 100.

[0045] Among them, when the material of the air-conditioning water tank 100 is metal, the trigger plate 200 and the touch spring 210 are both arranged inside the air-conditioning water tank 100, and the low-voltage grounding terminal and the high-voltage grounding terminal are connected through the metal air-conditioning water tank 100, and the detection resistor R1 also needs to be connected to the touch spring 210 through a series capacitor group.

[0046] The utility model utilizes the working principle of the touch spring 210 and the trigger plate 200 to detect whether there is water in the air-conditioning water tank 100. There is no need to set the reed switch inside the air-conditioning water tank 100, which simplifies the product structure and reduces hardware costs. It changes the mechanical detection method in the prior art to electronic detection, thereby enhancing the accuracy and stability of water level detection.

[0047] Reference Figure 1 and Figure 2 In some embodiments of the first aspect of the present utility model, the control circuit 310 includes: a control chip U1 and a filtering energy storage circuit 311 .

[0048] The DC voltage source is electrically connected to the input end of the filter tank circuit 311, and the output end of the filter tank circuit 311 is electrically connected to the control chip U1. The control chip U1 is a SH79F326P control chip U1.

[0049] The filtering energy storage circuit 311 includes: an energy storage capacitor EC1, a first inductor L1 and a filtering capacitor C1.

[0050] One end of the first inductor L1 is electrically connected to the DC voltage source, the other end of the first inductor L1 is electrically connected to the positive terminal of the energy storage capacitor EC1, and the negative terminal of the energy storage capacitor EC1 is grounded. The other end of the first inductor L1 is electrically connected to one end of the filter capacitor C1, one end of the filter capacitor C1 is electrically connected to the control chip U1, and the other end of the first inductor L1 is grounded.

[0051] Reference Figure 1 and Figure 2In some embodiments of the first aspect of the utility model, the upper surface of the trigger plate 200 can be tightly connected to the inner wall at the top of the cavity 110, that is, the upper surface of the trigger plate 200 is tightly connected to the outer wall of the air-conditioning water tank 100 to realize the connection between the trigger plate 200 and the top of the cavity 110, so that when the air-conditioning water tank 100 is filled with water, the trigger plate 200 can sense the water pressure at the bottom of the air-conditioning water tank 100.

[0052] In this embodiment, the material of the air-conditioning water tank 100 is non-metallic material, that is, the air-conditioning water tank 100 can be a plastic water tank, a ceramic water tank or a rubber water tank, etc. In this utility model, no specific restrictions are made on the non-metallic material of the air-conditioning water tank 100.

[0053] Reference Figure 1 and Figure 3 In some embodiments of the first aspect of the utility model, the top of the cavity 110 and the trigger plate 200 are integrated, that is, the trigger plate 200 can be embedded in the wall of the air-conditioning water tank 100, so that the trigger plate 200 can accurately sense the water pressure at the bottom of the air-conditioning water tank 100.

[0054] In this embodiment, the material of the air-conditioning water tank 100 is non-metallic material, that is, the air-conditioning water tank 100 can be a plastic water tank, a ceramic water tank or a rubber water tank, etc. In this utility model, no specific restrictions are made on the non-metallic material of the air-conditioning water tank 100.

[0055] It can be seen from the scheme of the above embodiment that the trigger plate 200 is connected to the top of the cavity 110 to accurately sense or accurately withstand the water pressure at the bottom of the air-conditioning water tank 100, compress the touch spring 210, and the touch spring 210 outputs a detection signal to the control circuit 310 to accurately realize the water detection function of the air-conditioning water tank 100, thereby enhancing the accuracy and stability of water level detection.

[0056] In some embodiments of the second aspect of the present utility model, a mobile air conditioner includes a water level detection circuit of an air conditioning water tank as in some embodiments of the first aspect of the present utility model.

[0057] The preferred implementation methods of the utility model are specifically described above, but the invention of the utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the utility model. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A water level detection circuit for an air conditioning water tank, characterized in that: include: Air conditioning tank, trigger board, touch spring, DC voltage source and control board; The outer wall of the bottom of the air-conditioning water tank is connected to the control board, the bottom of the air-conditioning water tank is provided with a groove, the control board and the groove form a cavity, the touch spring and the trigger board are both arranged inside the cavity, a control circuit is provided on the control board, the touch spring is connected to the control circuit and the trigger board respectively, the top of the cavity is connected to the trigger board, and the DC voltage source is connected to the control circuit; The trigger plate compresses the touch spring through the water pressure it receives, and the touch spring is deformed, outputting a detection signal to the control circuit. The control circuit is used to receive the detection signal to determine whether there is water in the air-conditioning water tank.

2. The water level detection circuit of an air conditioning water tank according to claim 1, characterized in that: The control board is also provided with a detection circuit; the output end of the detection circuit is connected to the control circuit, and the input end of the detection circuit is connected to the touch spring.

3. The water level detection circuit of an air conditioning water tank according to claim 2, characterized in that: The detection circuit comprises: an amplifier circuit and a detection resistor; The input end of the amplifier circuit is connected to the detection resistor, the detection resistor is connected to the touch spring, and the output end of the amplifier circuit is connected to the control circuit.

4. The water level detection circuit of an air conditioning water tank according to claim 2, characterized in that: The control circuit includes: a control chip and a filtering energy storage circuit; The input end of the filtering energy storage circuit is connected to a DC voltage source, the output end of the filtering energy storage circuit is connected to a control chip, and the control chip is connected to the output end of the detection circuit.

5. The water level detection circuit of an air conditioning water tank according to claim 4, characterized in that: The filtering energy storage circuit comprises: an energy storage capacitor, a first inductor and a filtering capacitor; The DC voltage source is connected to one end of the first inductor, the energy storage capacitor and the filter capacitor are both connected to the other end of the first inductor, and the filter capacitor is connected to the control chip.

6. The water level detection circuit of an air conditioning water tank according to claim 1, characterized in that: The top of the cavity and the trigger plate are integrated.

7. The water level detection circuit of an air conditioning water tank according to claim 1, characterized in that: The upper surface of the trigger plate is connected to the inner wall of the top of the cavity.

8. The water level detection circuit of an air conditioning water tank according to claim 4, characterized in that: The control chip is a SH79F326P control chip.

9. The water level detection circuit of an air conditioning water tank according to claim 1, characterized in that: The material of the air conditioning water tank is non-metallic material.

10. A mobile air conditioner, characterized in that: The invention comprises a water level detection circuit of an air-conditioning water tank as claimed in any one of claims 1 to 9.

Images