Air supplement system

Abstract

The utility model provides an air supplement system which comprises a ventilation pipeline, a plurality of air supply pipes, a plurality of air supply pipes and a plurality of air supply pipes, wherein the ventilation pipeline is provided with an air inlet and an air outlet; the motor is arranged in the ventilation pipeline; the fan is arranged in the ventilation pipeline and is in driving connection with the motor; the current transformer is used for monitoring current flowing through a power line of the range hood; the input end of the controller is in communication connection with the output end of the current transformer, and the output end of the controller is in communication connection with the control end of the motor. According to the utility model, the current transformer is used for monitoring the current data flowing through the power line of the range hood, so that the controller can control the motor to be automatically started according to the change of the current data while the range hood is started, and then the fan is controlled to be automatically started for air supplement, thereby avoiding manual operation; and synchronous operation of air exhaust and air supplement in the kitchen is realized.

Description

Technical Field

[0001] This utility model relates to the field of air supply technology, and specifically to an air supply system. Background Technology

[0002] When a kitchen range hood is turned on, some indoor air is exhausted to the outside. To prevent negative pressure from forming during exhaust, it is necessary to perform a supplementary air operation simultaneously to create a circulating airflow. Currently, supplementary air is usually achieved by manually opening windows or manually turning on a supplementary air fan. This process is cumbersome, and it is easy to forget to perform supplementary air, which is not conducive to the simultaneous operation of exhaust and supplementary air. Utility Model Content

[0003] In view of this, the present invention provides a make-up air system to solve the above-mentioned technical problems.

[0004] The make-up air system provided by this utility model includes:

[0005] A ventilation duct, wherein the ventilation duct is provided with a connected air inlet and an air outlet;

[0006] An electric motor is disposed inside the ventilation duct;

[0007] A fan, which is installed inside the ventilation duct and connected to the motor drive;

[0008] A current transformer, wherein the current transformer is used to monitor the current flowing through the power cord of the range hood;

[0009] The controller has its input terminal communicatively connected to the output terminal of the current transformer, and its output terminal communicatively connected to the control terminal of the motor.

[0010] Optionally, the air supply system further includes a wind speed sensor, which is disposed inside the ventilation duct, and the output of the wind speed sensor is communicatively connected to the input of the controller.

[0011] Optionally, the make-up air system further includes:

[0012] A temperature sensor is installed inside the ventilation duct, and the output terminal of the temperature sensor is communicatively connected to the input terminal of the controller.

[0013] A heating device is provided, which is located on the side of the temperature sensor facing the air inlet, and the control terminal of the heating device is communicatively connected to the output terminal of the controller.

[0014] Optionally, the heating device is a PTC electric heater.

[0015] Optionally, the make-up air system further includes a differential pressure sensor, wherein the two detection terminals of the differential pressure sensor are respectively disposed on the inlet side and the outlet side of the fan, and the output terminal of the differential pressure sensor is communicatively connected to the input terminal of the controller.

[0016] Optionally, the make-up air system further includes a filter device disposed within the ventilation duct.

[0017] Optionally, the filtration device includes:

[0018] A primary filter is provided, which is positioned near the air inlet.

[0019] A high-efficiency filter is disposed on the side of the pre-filter facing the air outlet.

[0020] Optionally, the air supply system further includes a rain shelter, which is disposed at the air inlet.

[0021] Optionally, the motor is a permanent magnet DC motor.

[0022] Optionally, the make-up air system further includes a power distribution box, and the motor is connected to the power distribution box via a wire.

[0023] The technical solution provided by this utility model has at least the following beneficial effects compared with the prior art:

[0024] The air supply system of this invention uses a current transformer to monitor the current data flowing through the power line of the range hood. When the range hood is started, the controller can automatically start the motor according to the change in current data, and then automatically start the fan to supply air, eliminating the need for manual operation and realizing the simultaneous operation of indoor exhaust and air supply in the kitchen. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the air supply system according to one embodiment of the present invention.

[0026] Figure label:

[0027] 1: Ventilation duct; 101: Air inlet; 102: Air outlet; 2: Fan; 3: Current transformer; 4: Controller; 5: Range hood power cord; 6: Wind speed sensor; 7: Temperature sensor; 8: Heating device; 9: Differential pressure sensor; 10: Filter device; 11: Rainproof canopy; 12: Electrical distribution box. Detailed Implementation

[0028] The embodiments of this utility model will be further described below with reference to the accompanying drawings. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the purpose of simplifying the description of this utility model. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0029] Figure 1 This is a schematic diagram of a make-up air system according to one embodiment of the present invention. Figure 1 As shown, the make-up air system includes a ventilation duct 1, a motor (not shown), a fan 2, a current transformer 3, and a controller 4. The ventilation duct 1 has a connected air inlet 101 and an air outlet 102; the motor is installed inside the ventilation duct 1; the fan 2 is installed inside the ventilation duct 1 and is connected to the motor drive; the current transformer 3 is used to monitor the current flowing through the range hood power cord 5; the input terminal of the controller 4 is communicatively connected to the output terminal of the current transformer 3, and the output terminal of the controller 4 is communicatively connected to the control terminal of the motor.

[0030] When in use, the range hood power cord 5 is passed through the current transformer 3. When the range hood starts to exhaust, the current flowing through the power cord 5 is no longer zero. The current transformer 3 monitors the current data flowing through the power cord 5 in real time and transmits the monitored current data to the controller 4 in real time. The controller 4 determines that the current data is greater than zero, and then controls the motor to start, which in turn drives the fan 2 to rotate, drawing fresh air from the outside into the room through the ventilation duct 1, so that the range hood exhausts air while simultaneously replenishing air, forming a circulating airflow.

[0031] By using the air replenishment system of this utility model, the current transformer 3 monitors the current data flowing through the power line 5 of the range hood. When the range hood is started, the controller 4 can control the motor to start automatically according to the change of current data, and then control the fan 2 to start automatically to replenish air, eliminating the need for manual operation and realizing the synchronous operation of indoor exhaust and air replenishment in the kitchen.

[0032] like Figure 1As shown, the left end of the ventilation duct 1 is the air inlet 101, and the right end is the air outlet 102. The controller 4, motor, and fan 2 are all spaced apart within the ventilation duct 1. The current transformer 3, i.e., the current inductor coil, is used to monitor the current flow data in real time by passing the range hood power cord 5 through the current inductor coil. The current transformer 3 is wired to the controller 4, but can also be set to a wireless connection. The specifications and models of the motor and fan 2 can be matched and adjusted according to the actual application.

[0033] Optionally, the make-up air system also includes a wind speed sensor 6, which is installed inside the ventilation duct 1, and the output of the wind speed sensor 6 is communicatively connected to the input of the controller 4.

[0034] The wind speed sensor 6 monitors the wind speed data of the airflow through the ventilation duct 1 in real time and transmits the wind speed data to the controller 4. The current transformer 3 monitors the current data of the power cord 5 of the range hood in real time and transmits the current data to the controller 4. When the range hood is running at different speeds (low or high), the current data flowing through the power cord 5 is different, the output power of the range hood exhaust is also different, that is, the exhaust volume per unit time is different, and the exhaust wind speed of the range hood is different. Correspondingly, the required make-up air volume per unit time is also different, that is, the required wind speed in the ventilation duct 1 is different. The controller 4 internally stores the corresponding matching airflow speeds for different current data. It compares these matching airflow speeds with the airflow speed data monitored by the wind speed sensor 6. When the wind speed data is lower than the matching airflow speed, the controller 4 appropriately increases the motor's output power, thereby driving the fan 2 to run faster and increasing the airflow speed. When the wind speed data is higher than the matching airflow speed, the controller 4 appropriately decreases the motor's output power, thereby driving the fan 2 to run slower and decreasing the airflow speed. The matching airflow speed is slightly lower than the exhaust speed of the range hood. The controller 4's control logic for adjusting the motor's output power based on changes in current and wind speed data can be implemented using existing mature algorithms; its specific working principle will not be elaborated here.

[0035] Optionally, the make-up air system also includes a temperature sensor 7 and a heating device 8. The temperature sensor 7 is disposed inside the ventilation duct 1, and the output end of the temperature sensor 7 is communicatively connected to the input end of the controller 4; the heating device 8 is disposed on the side of the temperature sensor 7 facing the air inlet 101, and the control end of the heating device 8 is communicatively connected to the output end of the controller 4.

[0036] In winter, outdoor air temperatures are low, and directly introducing outdoor air into the kitchen can easily cause discomfort. The above setup addresses this by controlling the heating device 8 when the current transformer 3 detects a positive current flow through the range hood's power cord 5, indicating the range hood is operating. This heats the outdoor airflow flowing through the ventilation duct 1 before being delivered indoors. The temperature sensor 7 monitors the airflow temperature in real time and transmits this data to the controller 4. The controller 4 stores a preset temperature for optimal human comfort. When the temperature is below the preset temperature, the controller 4 increases the output power of the heating device 8, rapidly raising the airflow temperature. Conversely, when the temperature is above the preset temperature, the controller 4 decreases the output power, bringing the airflow temperature closer to the preset temperature. The controller 4's logic for adjusting the heating device 8's output power based on temperature changes detected by the temperature sensor 7 can be implemented using existing algorithms; its specific working principle will not be elaborated here. Depending on the application, the heating device 8 can be any structure suitable for the air supply system.

[0037] Optionally, the heating device 8 uses a PTC electric heater. PTC electric heaters have low thermal resistance, high heat exchange efficiency, and high safety performance. Under any application conditions, they will not produce the surface "reddening" phenomenon like electric heating tube heaters, thus avoiding safety hazards such as burns and fires.

[0038] Optionally, the make-up air system also includes a differential pressure sensor 9, with two detection terminals of the differential pressure sensor 9 respectively located on the inlet side and outlet side of the fan 2, and the output terminal of the differential pressure sensor 9 being communicatively connected to the input terminal of the controller 4.

[0039] During the operation of the make-up air system, the two detection ends of the differential pressure sensor 9 are located on the inlet side and the outlet side of the fan 2, respectively, to monitor the pressure difference data between the outlet side and the inlet side of the fan 2 in real time, and transmit the pressure difference data to the controller 4 in real time. The controller 4 has a pre-stored set range of the pressure difference between the outlet and inlet sides of the fan 2 when the make-up air system is operating normally. When the pressure difference data is not within the set range, it indicates that the fan 2 may be malfunctioning. At this time, the controller 4 controls the heating device 8 to stop operating to prevent the heating device 8 from continuing to operate under the premise of fan 2 malfunction, which would cause the ventilation duct 1 to overheat.

[0040] Optionally, the make-up air system also includes a filter device 10, which is installed inside the ventilation duct 1. The filter device 10 filters the airflow introduced into the ventilation duct 1, removing impurities and preventing them from entering the room, thus ensuring the cleanliness of the introduced airflow. Depending on the actual application, the filter device 10 can be any commercially available structural form suitable for use within the ventilation duct 1.

[0041] Optionally, the filtration device 10 includes a pre-filter and a high-efficiency filter. The pre-filter is located near the air inlet 101; the high-efficiency filter is located on the side of the pre-filter facing the air outlet 102. This arrangement first uses the pre-filter to perform preliminary filtration of large particulate impurities in the airflow introduced into the ventilation duct 1, and then uses the high-efficiency filter to perform secondary filtration of small particulate impurities in the pre-filtered airflow, ensuring the filtration effect on the flowing airflow.

[0042] Optionally, the air supply system also includes a rain shelter 11, which is located at the air inlet 101.

[0043] like Figure 1 As shown, a rain shelter 11 is installed at the air inlet 101 at the left end of the ventilation duct 1. The rain shelter 11 extends in an arc shape from the top of the air inlet 101 to the lower left, maintaining a certain distance from the air inlet 101 and blocking the air inlet 101 to prevent rainwater and insects from entering the ventilation duct 1 through the air inlet 101.

[0044] Alternatively, a permanent magnet DC motor can be selected. Permanent magnet DC motors are small in size, light in weight, simple in structure, and highly efficient. In addition, permanent magnet DC motors use permanent magnets to generate a magnetic field, which does not require an additional excitation current, so the noise generated during operation is relatively low.

[0045] Optionally, the make-up air system also includes a distribution box 12, to which the motor is connected via wires.

[0046] The junction box 12 offers multiple benefits, not only protecting wires from damage and enhancing safety, but also optimizing circuit layout and improving system flexibility and maintainability.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A supplemental air system, characterized by, The system comprises: a ventilation duct, which is provided with a communicating air inlet and air outlet; a motor, which is arranged in the ventilation duct; a fan, which is arranged in the ventilation duct and is drivingly connected with the motor; a current transformer, which is used for monitoring the current flowing through the power line of the range hood; a controller, the input end of which is communicatively connected with the output end of the current transformer, and the output end of which is communicatively connected with the control end of the motor; a temperature sensor, which is arranged in the ventilation duct, and the output end of which is communicatively connected with the input end of the controller; a heating device, which is arranged on the side of the temperature sensor facing the air inlet, and the control end of which is communicatively connected with the output end of the controller; a differential pressure sensor, two detection ends of which are arranged on the inlet side and outlet side of the fan respectively, and which is used for monitoring the differential pressure data between the pressure on the outlet side and the pressure on the inlet side of the fan in real time, and the output end of which is communicatively connected with the input end of the controller, and when the differential pressure data is not within the set range, the controller controls the heating device to stop running.

2. The air supplementation system of claim 1, wherein Further comprising: a wind speed sensor, which is arranged in the ventilation duct, and the output end of which is communicatively connected with the input end of the controller.

3. The air supplementing system according to claim 1 or 2, characterized in that: the heating device adopts a PTC electric heater.

4. The air supplementation system according to claim 1 or 2, characterized in that Further comprising: a filtering device, which is arranged in the ventilation duct.

5. The air supplementation system of claim 4, wherein The filtering device comprises: a primary filter, which is arranged close to the air inlet; a high-efficiency filter, which is arranged on the side of the primary filter facing the air outlet.

6. The air supplementation system according to claim 1 or 2, characterized in that Further comprising: a rainproof shed, which is arranged at the air inlet.

7. The air supplementing system according to claim 1 or 2, characterized in that: the motor is a permanent magnet DC motor.

8. The air supplementation system according to claim 1 or 2, characterized in that, Further comprising: a power distribution box, to which the motor is connected through wires.

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