Water shortage detection device for evaporative humidifier

Abstract

The utility model discloses an evaporative humidifier water shortage detection device which comprises a water tank and a controller, the water tank is provided with an air inlet, the inner side of the water tank is provided with a water curtain, the top of the water tank is provided with an upper shell, a fan is arranged in the upper shell, and the upper shell is provided with an air outlet; a first humidity sensor is arranged at the air inlet, and a second humidity sensor is arranged at the air outlet; and the fan, the first humidity sensor and the second humidity sensor are respectively connected with the controller. The water shortage detection device for the evaporative humidifier does not need to be provided with a floating ball, a Hall sensor and other components like a traditional technology, and is simpler in structure and more reliable in operation.

Description

Technical Field

[0001] The utility model relates to the technical field of humidifiers, in particular to a water shortage detection device for an evaporative humidifier. Background Art

[0002] In order to detect whether the evaporative humidifier is short of water, the traditional solution is usually to install a float with a magnet in the water tank (or sink) and install a reed switch (or Hall sensor) outside the water tank (or sink). However, such a structure is relatively complicated, the water tank is not easy to clean, and once the float is stuck, the detection device will fail and the water level cannot be detected normally. In view of the above technical problems, this application proposes a new technical solution with a simple structure and more reliable. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a water shortage detection device for an evaporative humidifier, aiming to solve the technical problems in the prior art that the water shortage detection device for an evaporative humidifier is complex in structure and prone to failure.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A water shortage detection device for an evaporative humidifier comprises a water tank and a controller, wherein the water tank is provided with an air inlet, a water curtain is arranged inside the water tank, an upper shell is arranged on the top of the water tank, a fan is arranged inside the upper shell, and an air outlet is arranged on the upper shell; a first humidity sensor is arranged at the air inlet, and a second humidity sensor is arranged at the air outlet; the fan, the first humidity sensor and the second humidity sensor are respectively connected to the controller.

[0006] Furthermore, in the evaporative humidifier water shortage detection device, the air inlet is arranged at more than one half of the vertical height of the water tank.

[0007] Furthermore, in the water shortage detection device for the evaporative humidifier, the first humidity sensor is arranged at the top of the air inlet.

[0008] Furthermore, in the water shortage detection device for an evaporative humidifier, the air outlet is arranged at the top of the upper shell.

[0009] Furthermore, in the evaporative humidifier water shortage detection device, the cross-section of the water tank is circular or rectangular.

[0010] Furthermore, in the evaporative humidifier water shortage detection device, the cross-sectional shape of the water curtain is adapted to the cross-sectional shape of the water tank.

[0011] Furthermore, in the evaporative humidifier water shortage detection device, the fan, the water tank, and the water curtain are coaxially arranged.

[0012] Beneficial effects: The utility model provides a water shortage detection device for an evaporative humidifier, which has at least the following advantages compared with the prior art: (1) The structure is simpler. The present application does not need to set components such as a float with a magnet and a Hall sensor, but instead sets a first humidity sensor and a second humidity sensor; (2) The operation is more reliable. The present application does not have the risk of the float getting stuck; (3) The maintenance is simpler. The first humidity sensor is set at the air inlet and the second humidity sensor is set at the air outlet, which makes inspection, maintenance, and replacement very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural schematic diagram of the water shortage detection device for an evaporative humidifier provided by the utility model. DETAILED DESCRIPTION

[0014] The utility model provides a water shortage detection device for an evaporative humidifier. In order to make the purpose, technical solution and effect of the utility model clearer and more specific, the utility model is further described in detail below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0015] See also Figure 1 The utility model provides a water shortage detection device for an evaporative humidifier. The drawings are only used to explain the structural principle and are not proportional to the actual product. The drawings only depict the structures related to the invention of the present application, and some conventional structures (for example, a controller, etc.) are not specifically depicted. The terms "first", "second", etc. described herein are merely different names for similar structures for the purpose of explanation, and are not intended to limit the present application.

[0016] A water shortage detection device for an evaporative humidifier includes a water tank 1 and a controller (e.g., a single chip microcomputer, etc.), the water tank is provided with an air inlet 100, a water curtain 2 is provided inside the water tank, an upper shell 3 is provided on the top of the water tank, a fan 4 is provided inside the upper shell, and an air outlet 300 is provided on the upper shell; a first humidity sensor 81 is provided at the air inlet, and a second humidity sensor 82 is provided at the air outlet; the fan, the first humidity sensor, and the second humidity sensor are respectively connected to the controller. The air inlet is provided along the entire circumference of the water tank to ensure that air can be sucked into the water tank from all directions.

[0017] Preferably, the air inlet is arranged at more than one half of the vertical height of the water tank.

[0018] Preferably, the first humidity sensor is arranged at the top of the air inlet, that is, the position of the first humidity sensor is as far away from the water level in the water tank as possible to ensure that the detected humidity value is the humidity in the ambient air.

[0019] Preferably, the air outlet is arranged at the top of the upper shell.

[0020] Preferably, the cross section of the water tank is circular or rectangular.

[0021] Preferably, the cross-sectional shape of the water curtain is adapted to the cross-sectional shape of the water tank, that is, if the cross-sectional shape of the water tank is rectangular, then the cross-sectional shape of the water curtain is rectangular; if the cross-sectional shape of the water tank is circular, then the cross-sectional shape of the water curtain is circular.

[0022] Preferably, the fan, the water box, and the water curtain are coaxially arranged so that the ambient air passes through the air inlet and the water curtain uniformly in the circumferential direction.

[0023] Furthermore, the evaporative humidifier water shortage detection device also includes a display screen and an alarm (not shown in the figure), and the display screen and the alarm are connected to the controller. This setting can display the detection values ​​of the second humidity sensor and the first humidity sensor and the difference between the two in real time. If the difference between the two is lower than the preset lower limit, it means that the water level in the water tank is too low, and an alarm is issued.

[0024] From the above analysis, it can be seen that the innovation of the technical solution proposed in this application is that it does not require the setting of components such as a float with a magnet and a Hall sensor, and does not require direct detection of the specific water level of the water tank. It only needs to detect the humidity at the outlet of the evaporative humidifier (the detection value of the second humidity sensor) and the humidity at the inlet (the detection value of the first humidity sensor). The difference between the two can be used to determine whether the evaporative humidifier can humidify normally. If the difference between the two is too low, it means that there is a lack of water in the water tank and water needs to be added to the water tank.

[0025] It should be noted that the present invention seeks to protect the structure of the device for detecting water shortage in an evaporative humidifier, rather than proposing a new computer program, because how to use a controller to compare the detection values ​​of two sensors is a prior art, not a new program.

[0026] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and the utility model concept of the utility model, and all these changes or substitutions should fall within the protection scope of the utility model.

Claims

1. A water shortage detection device for an evaporative humidifier, comprising a water tank and a controller, wherein the water tank is provided with an air inlet, characterized in that: A water curtain is arranged inside the water tank, an upper shell is arranged on the top of the water tank, a fan is arranged inside the upper shell, and an air outlet is opened in the upper shell; a first humidity sensor is arranged at the air inlet, and a second humidity sensor is arranged at the air outlet; the fan, the first humidity sensor and the second humidity sensor are respectively connected to the controller.

2. The evaporative humidifier water shortage detection device according to claim 1, characterized in that: The air inlet is arranged at more than one half of the vertical height of the water tank.

3. The water shortage detection device for an evaporative humidifier according to claim 1 or 2, characterized in that: The first humidity sensor is arranged at the top of the air inlet.

4. The evaporative humidifier water shortage detection device according to claim 1, characterized in that: The air outlet is arranged on the top of the upper shell.

5. The water shortage detection device for an evaporative humidifier according to claim 1, characterized in that: The cross section of the water tank is circular or rectangular.

6. The evaporative humidifier water shortage detection device according to claim 5, characterized in that: The cross-sectional shape of the water curtain is adapted to the cross-sectional shape of the water tank.

7. The water shortage detection device for an evaporative humidifier according to claim 1, characterized in that: The fan, water tank, and water curtain are coaxially arranged.

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