CN210512047U - New trend switch - Google Patents
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- CN210512047U CN210512047U CN201921340875.0U CN201921340875U CN210512047U CN 210512047 U CN210512047 U CN 210512047U CN 201921340875 U CN201921340875 U CN 201921340875U CN 210512047 U CN210512047 U CN 210512047U
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Abstract
The utility model relates to a fresh air exchanger, which comprises a case, a controller, a total heat exchange core, an exhaust motor connected with a signal output port of the controller and a fresh air motor; the machine case is provided with a fresh air inlet and an air exhaust outlet which are communicated with the outside, and a fresh air outlet and an air exhaust inlet which are communicated with the inside, and the fresh air outlet is provided with a heating body and a first temperature detector; a second temperature detector is arranged at the air exhaust inlet; the heating body, the first temperature detector and the second temperature detector are electrically connected with the controller; the first temperature detector and the second temperature detector respectively acquire a fresh air temperature signal and an exhaust air temperature signal and transmit the fresh air temperature signal and the exhaust air temperature signal to the controller; the controller receives the fresh air temperature signal and the exhaust air temperature signal and sends a fresh air heating signal to the heating body; the heating body receives the fresh air heating signal to heat the fresh air, so that the fresh air conveyed to the room becomes warm air which is comfortable to human body.
Description
Technical Field
The utility model relates to a new trend exchange technical field especially relates to a new trend switch.
Background
The fresh air exchanger is a fresh air and exhaust air interchanger containing a full total heat exchange core, on one hand, dirty indoor air is exhausted outdoors, on the other hand, fresh outdoor air is input indoors after being sterilized, disinfected, filtered and the like, and an advanced heat exchange technology is adopted in the air exchange process, so that the function of energy recovery is achieved, the indoor energy loss is reduced, and the air in a room is fresh and clean at every moment. However, in winter, because the difference between the indoor temperature and the outdoor temperature is too large, the temperature of the fresh air cannot reach the comfortable temperature of a human body due to the conversion efficiency and the energy loss of the heat exchanger, the temperature difference between the fresh air blown into a room from the fresh air inlet and the indoor air is still large, and people need to seek other heating equipment for heating, which is not convenient enough.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model aims to provide a new trend switch, it has the advantage that can be to new trend self-heating.
The fresh air exchanger comprises a case, a controller arranged in the case, a total heat exchange core, an air exhaust motor connected with a signal output port of the controller and a fresh air motor; the machine case is provided with a fresh air inlet and an exhaust outlet which are communicated with the outside, and a fresh air outlet and an exhaust inlet which are communicated with the inside; a heating body and a first temperature detector are arranged at the fresh air outlet; a second temperature detector is arranged at the air exhaust inlet; the heating body, the first temperature detector and the second temperature detector are electrically connected with the controller; the first temperature detector and the second temperature detector respectively acquire a fresh air temperature signal and an exhaust air temperature signal and transmit the fresh air temperature signal and the exhaust air temperature signal to the controller; the controller receives the fresh air temperature signal and the exhaust air temperature signal and sends a fresh air heating signal to the heating body; and the heating body receives the fresh air heating signal to heat fresh air.
Fresh air switch, it can detect and carry to indoor new trend and carry to the temperature of outdoor airing exhaust to carry out self-heating to the new trend and make it become the warm braw.
Further, the first temperature detector and the second temperature detector are respectively connected to a signal input port of the controller through a temperature detection circuit; the temperature detection circuit comprises a pull-down resistor and a filter capacitor which are connected to output ends of the first temperature detector and the second temperature detector.
Furthermore, a current detection module is also arranged on a power input circuit of the heating body; the current detection module comprises a current detection chip and a comparator circuit connected to the output end of the current detection chip; a current to be detected and a current sensor are integrated in the current detection chip; the power supply input line of the heating body is connected to an alternating current power supply through the tested current path; the output of the current sensor is connected to the signal input port of the comparator circuit.
Furthermore, the current path to be detected is provided with a current input end to be detected, a current output end to be detected and a detection resistor connected between the current input end to be detected and the current output end to be detected; the current input end to be tested is connected to an alternating current power supply; the current output end to be tested is connected to the power input terminal of the heating body.
Further, a non-inverting input end of the comparator circuit is connected to an output end of the current detection chip, an inverting input end of the comparator circuit is connected to a reference power supply, and an output end of the comparator circuit is connected to a signal input end of the controller.
Further, the inverting input terminal of the comparator circuit is connected to a reference power supply through an adjustable potentiometer.
Furthermore, a temperature controller is also arranged above the heating body; the temperature controller is connected in series with the power input circuit of the heating body.
Furthermore, a heating driving circuit is arranged between the signal output port of the controller and the power input terminal of the heating body.
Further, the controller also comprises a buzzer connected to the signal output port of the controller.
Furthermore, the controller also comprises a reset key connected to the signal input port of the controller.
For a better understanding and an implementation, the present invention is described in detail below with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of a fresh air exchanger according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a temperature detection circuit according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a heating driving circuit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a current detection module according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an alarm circuit according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a reset circuit according to an embodiment of the present invention.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
Please refer to fig. 1, which is a schematic structural diagram of a fresh air exchanger according to an embodiment of the present invention.
The fresh air exchanger provided by the embodiment of the utility model comprises a machine case 10, and a controller 20, an exhaust motor 30, a fresh air motor 40, a total heat exchange core 50, a filtering device 60, a heating body 70, a first temperature detector 80 and a second temperature detector 90 which are arranged inside the machine case 10; the exhaust motor 30, the fresh air motor 40 and the heating body 70 are connected to a signal output port of the controller 20; the first and second temperature detectors 80 and 90 are connected to a signal input port of the controller 20; .
The exhaust motor 30 is used for exhausting the indoor turbid air to the outside; the fresh air motor 40 is used for conveying outdoor fresh air to the indoor; the total heat exchange core 50 is provided with a fresh air channel and an exhaust air channel; the fresh air channel is positioned on a fresh air channel of the fresh air exchanger; the air exhaust channel is positioned on the air exhaust duct of the fresh air exchanger and used for heat exchange between the fresh air duct and the air exhaust duct; the filtering device 60 is used for purifying and filtering fresh air; the heating body 70 is a PTC heating body, is disposed at the air outlet of the fresh air motor 40, i.e., at the fresh air outlet 13 of the side wall of the case 10, and is used for heating the fresh air delivered to the room. In this embodiment, the exhaust motor 30, the fresh air motor 40, the total heat exchange core 50, the filtering device 60 and the heating body 70 are all existing devices in the prior art, and the manufacturer and the specific model are not limited as long as the related functions can be realized.
The case 10 is provided with a fresh air inlet 11 and an exhaust air outlet 12 communicated to the outside, and a fresh air outlet 13 and an exhaust air inlet 14 communicated to the inside; the rear end of the fresh air inlet 11 is provided with the filtering device 60.
When the fresh air exchanger is used, outdoor fresh air enters the case 10 from the fresh air inlet 11, passes through the fresh air channel of the total heat exchange core 50 after being purified and filtered by the filtering device 60, is thermally compensated by the air flowing out of the fresh air channel of the total heat exchange core 50, and flows indoors from the fresh air outlet 13 under the action of the fresh air motor 40, so that the outdoor fresh air is continuously conveyed indoors. Meanwhile, indoor turbid air enters the inside of the case 10 from the air exhaust inlet 14 and passes through the air exhaust channel of the total heat exchange core 50, because the temperature of the indoor air in winter is generally higher than that of the outdoor air, at this time, heat passing through the air exhaust channel of the total heat exchange core 50 is transferred to the fresh air passing through the fresh air channel to realize temperature compensation, and the indoor turbid air is exhausted outdoors under the action of the air exhaust motor 30, so that the exchange of the indoor air and the outdoor air is realized.
The fresh air outlet 13 of the fresh air exchanger in this embodiment is provided with the heating body 70 and a first temperature detector 80; the second temperature detector 90 is disposed at the discharge air inlet 14.
In the process of indoor and outdoor air exchange, the temperature at the indoor fresh air outlet 13 is detected by a first temperature detector 80, and the temperature at the indoor exhaust air inlet 14 is detected by a second temperature detector 90, so that a fresh air temperature signal and an exhaust air temperature signal are respectively acquired and transmitted to the controller 20; the controller 20 receives the fresh air temperature signal and the exhaust air temperature signal, and when the difference between the temperatures at the indoor exhaust air inlet 14 and the indoor fresh air outlet 13 exceeds a certain value, the controller 20 sends a fresh air heating signal to the heating body 70; the heating body 70 receives the fresh air heating signal to automatically heat the fresh air, so that the fresh air becomes warm air which is comfortable for human body.
In this embodiment, the controller 20 controls the operation of the whole fresh air exchanger as a control device of the fresh air exchanger, so as to realize the functions of fresh air transportation, indoor air exhaust, indoor and outdoor temperature detection, fresh air heating and the like, and the specific manufacturer and model are not limited.
The first temperature detector 80 and the second temperature detector 90 are both temperature sensors, and the temperature sensors are connected to a signal input port of the controller through a temperature detection circuit; the temperature detection circuit comprises a pull-down resistor and a filter capacitor which are connected to output ends of the first temperature detector and the second temperature detector.
Please refer to fig. 2, which is a schematic diagram of a temperature detection circuit according to an embodiment of the present invention.
The first temperature detector adopts a temperature sensor in the prior art, the specific model of the first temperature detector is not limited, and the first temperature detector is used for detecting the temperature of outdoor fresh air flowing indoors. In the temperature detection circuit diagram, a power supply pin of the temperature sensor RT2 is connected to a +5V dc power supply, an output pin thereof is connected to a signal input port of the controller 20, a connection between the output pin thereof and the signal input port of the controller 20 is also grounded through a pull-down resistor, and a first filter capacitor and a second filter capacitor are provided, wherein a capacitance value of the first filter capacitor may be 10UF/16V, and a capacitance value of the second filter capacitor may be 0.1 UF/10V.
The second temperature detector adopts a temperature sensor in the prior art, the specific type of the second temperature detector is not limited, and the second temperature detector is used for detecting the temperature of indoor exhaust air. In the temperature detection circuit diagram, a power supply pin of the temperature sensor RT1 is connected to a +5V dc power supply, an output pin thereof is connected to a signal input port of the controller, a connection between the output pin thereof and the signal input port of the controller is also grounded through a pull-down resistor, and a third filter capacitor and a fourth filter capacitor are provided, wherein a capacitance value of the third filter capacitor may be 10UF/16V, and a capacitance value of the fourth filter capacitor may be 0.1 UF/10V.
In other embodiments, the first filter capacitor, the second filter capacitor, the third filter capacitor and the fourth filter capacitor may also have other capacitance values.
In this embodiment, the heating body 70 is connected to the signal output port of the controller 20 through a heating driving circuit, and the schematic diagram of the heating driving circuit refers to fig. 3, which is the schematic diagram of the heating driving circuit according to the embodiment of the present invention.
The heating driving circuit comprises a first triode Q3 and a relay K3; a base electrode b of the first triode Q3 is connected to a signal output port of the controller 20 through a current-limiting resistor, a collector electrode c is connected with a coil pin of the relay K3, and an emitter electrode e is grounded; the relay K3 comprises a coil and a contact switch, a first pin of the coil of the relay K3 is connected to a +12V direct-current power supply, a second pin of the coil is connected with a collector c of a first triode Q3, and a freewheeling diode is connected between the first pin and the second pin in series in a reverse direction; the contact switch of the relay K3 is connected in series between the power input terminal of the heating body 70 and the live wire of the ac mains supply. When the signal output port of the controller 20 outputs a high level, the first triode Q3 is turned on, the coil of the relay K3 is electrically turned on, and the contact switch is closed, so that the heating body 70 is connected to an ac power supply to get electricity for heating.
In this embodiment, the first transistor Q3 may be an NPN transistor S8050, and the freewheeling diode may be 1N 4148. In other embodiments, the first transistor Q3 and the freewheeling diode may be of other types.
A temperature controller is further disposed above the heating body 70, and the distance between the temperature controller and the PTC heating body may be 1.5 mm, and the temperature controller is connected in series to the power input line of the heating body 70, in this embodiment, the temperature controller is connected in series between the contact switch of the relay K3 and the power input terminal of the heating body 70. The threshold value of the temperature controller is 130 ℃ -3 ℃, when the PTC heating element can not normally radiate heat, the temperature of the PTC heating element can rapidly rise, hot air flows upwards, at the moment, the temperature controller is tripped when detecting that the current temperature exceeds 130 ℃ -3 ℃, the PTC stops heating, and the over-temperature protection is realized.
A current detection module is further disposed on the power input line of the heating body 70, and the specific circuit principle refers to fig. 4, which is a schematic diagram of the current detection module according to the embodiment of the present invention.
The current detection module comprises a current detection chip and a comparator circuit connected to the output end of the current detection chip; a current to be detected and a current sensor are integrated in the current detection chip; the power input line of the heating body 70 is connected to an alternating current power supply through the current path to be measured; the output of the current sensor is connected to the signal input port of the comparator circuit. Specifically, the current path to be detected is provided with a current input end IP + to be detected, a current output end IP-to be detected and a detection resistor connected between the current input end IP + to be detected and the current output end IP-; the current input end IP + to be detected is connected to a live wire of an alternating current power supply; the current output terminal to be measured IP-is connected to a power input terminal of the heating body 70. The output end V-out of the current sensor is connected to the signal input end of the controller 20 through a comparator circuit, specifically, the non-inverting input end + of the comparator circuit is connected to the output end of the current detection chip, the inverting input end-is connected to the reference power supply +5V dc power supply through an adjustable potentiometer, and the output end is connected to the signal input end of the controller 20.
In this embodiment, the type of the current detection chip may be ACS 712; the type of the comparator can be LM393, and in other embodiments, the current detection chip and the comparator can also be in other types.
When the heating body 70 normally works and the temperature of the heating body 70 is within the normal temperature range, the current detection chip outputs a corresponding voltage signal to the non-inverting input terminal of the comparator circuit, the comparator circuit compares the voltage signal with a reference voltage signal and outputs a high level signal to the controller 20, and the controller 20 controls the power supply of the heating body 70 to be conducted for continuous heating. When the temperature of the heating body rises abnormally, namely the heating power is smaller than the rated power, the current flowing through the heating body is reduced, the voltage correspondingly output by the current detection chip is reduced, when the voltage of the in-phase input end of the comparator LM393 is smaller than the reference voltage of the reverse input end, the output end of the comparator LM393 outputs a low level, at the moment, the controller 20 detects the low level, and controls the signal output port to output the low level, so that the first triode Q3 is cut off, the coil of the relay K3 is de-energized, the contact switch of the relay is disconnected, the alternating current power supply live wire of the heating body 70 is cut off, and the heating body 70 stops.
The new trend switch described in this embodiment has adopted the current detection technique, utilizes the inherent characteristic of heat-generating body, the operating current that flows through the heat-generating body of real-time detection, and the voltage signal of current detection module output changes along with the heat-generating body operating current in step, with this output voltage signal as the heating member of new trend switch normal operating's that generates heat judgement signal, when this signal output is unusual, the power of heating member is realized heating protection to the controller control circuit disconnection of new trend switch.
Please refer to fig. 5, which is a schematic diagram of an alarm circuit according to an embodiment of the present invention.
In this embodiment, the fresh air exchanger is further provided with an alarm circuit, and an alarm is given when the temperature of the heating body 70 is abnormal. Specifically, the alarm in the alarm circuit is a buzzer, and is connected to the signal output port of the controller 20 through a transistor Q1. The positive pole of the buzzer is connected to a +5V direct current power supply through a current limiting resistor with the resistance value of 47 ohms, the negative pole of the buzzer is connected to the collector c of the triode Q1, the emitter e of the triode Q1 is grounded, and the base of the triode Q1 is connected to the signal output port of the air combat device 20 through a current limiting resistor with the resistance value of 22K ohms.
Please refer to fig. 6, which is a schematic diagram of a reset circuit according to an embodiment of the present invention.
In this embodiment, the fresh air exchanger is further provided with a reset circuit, and when the heating body 70 is abnormally disconnected during heating, the control system can be reset through a reset button in the maintenance process. One end of the reset key is grounded through a current limiting resistor with the resistance value of 100 ohms, and the other end of the reset key is connected to the signal input port of the controller 20. If the current detection circuit of the heating body 70 is operated three times in an accumulated manner, the heating body cannot be opened, the switch of the case 10 needs to be opened to check the maintenance equipment, and the switch SW is reset for 3 seconds after the abnormality is determined to be absent, so that the heating body 70 can normally work.
The new trend switch still includes constant voltage power supply module, and its power input end is connected to 220V and exchanges the commercial power, carries out step-down rectification processing output direct current to exchanging the commercial power, gives relay among controller 20, the drive circuit and other detection circuitry etc. provide the power.
In this embodiment, the constant voltage power supply module includes a rectifier bridge connected to an ac mains supply, a high frequency transformer connected to a rear end of the rectifier bridge, a filter diode, and a voltage stabilizing chip; the rectifier bridge is formed by bridging four rectifier diodes, rectifies alternating current commercial power and outputs high-voltage direct current; the high-frequency transformer is used for reducing the voltage of the high-voltage direct current and outputting the low-voltage direct current to a filter diode; the filter diode filters the low-voltage direct current and outputs a first direct current; the voltage stabilizing chip stabilizes the first direct current and outputs a second direct current. The first direct current is +12V direct current and is used for providing power for the relay; the second dc power is +5V dc power for powering the controller 20 and other sensing circuits.
In other embodiments, the constant voltage power supply module may have other circuit structures.
Fresh air switch at indoor outer air exchange's in-process, acquire fresh air temperature signal respectively through temperature sensor and air exhaust temperature signal sends to the controller, when the controller judges that the difference between the temperature of indoor air exhaust entrance and indoor fresh air exit exceeds 5 degrees, the control heating member generates heat and heats the warm braw that makes it become human comfortable sensation to the fresh air, and is very convenient, the user need not to seek other heating instrument again. Simultaneously, still set up heating member temperature controller and current detection module in the circuit to make the heating member can normally heat the use, prevent to appear unexpected because heating is unusual in the use.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (10)
1. A fresh air exchanger comprises a case, a controller arranged in the case, a total heat exchange core, an air exhaust motor connected to a signal output port of the controller and a fresh air motor; the machine case is provided with a fresh air inlet communicated to the outside and an air exhaust outlet, and is communicated to an indoor fresh air outlet and an air exhaust inlet, and the machine case is characterized in that: a heating body and a first temperature detector are arranged at the fresh air outlet; a second temperature detector is arranged at the air exhaust inlet; the heating body, the first temperature detector and the second temperature detector are electrically connected with the controller; the first temperature detector and the second temperature detector respectively acquire a fresh air temperature signal and an exhaust air temperature signal and transmit the fresh air temperature signal and the exhaust air temperature signal to the controller; the controller receives the fresh air temperature signal and the exhaust air temperature signal and sends a fresh air heating signal to the heating body; and the heating body receives the fresh air heating signal to heat fresh air.
2. The fresh air switch of claim 1, wherein: the first temperature detector and the second temperature detector are respectively connected to a signal input port of the controller through a temperature detection circuit; the temperature detection circuit comprises a pull-down resistor and a filter capacitor which are connected to output ends of the first temperature detector and the second temperature detector.
3. The fresh air switch of claim 1, wherein: a current detection module is also arranged on a power input circuit of the heating body; the current detection module comprises a current detection chip and a comparator circuit connected to the output end of the current detection chip; a current to be detected and a current sensor are integrated in the current detection chip; the power supply input line of the heating body is connected to an alternating current power supply through the tested current path; the output of the current sensor is connected to the signal input port of the comparator circuit.
4. The fresh air switch of claim 3, wherein: the current to be detected is provided with a current input end to be detected, a current output end to be detected and a detection resistor connected between the current input end to be detected and the current output end to be detected; the current input end to be tested is connected to an alternating current power supply; the current output end to be tested is connected to the power input terminal of the heating body.
5. The fresh air switch of claim 3, wherein: the non-inverting input end of the comparator circuit is connected to the output end of the current detection chip, the inverting input end of the comparator circuit is connected to a reference power supply, and the output end of the comparator circuit is connected to the signal input end of the controller.
6. The fresh air switch of claim 5, wherein: and the reverse input end of the comparator circuit is connected to a reference power supply through an adjustable potentiometer.
7. The fresh air switch of claim 1, wherein: a temperature controller is also arranged above the heating body; the temperature controller is connected in series with the power input circuit of the heating body.
8. The fresh air switch of claim 1, wherein: and a heating driving circuit is also arranged between the signal output port of the controller and the power input terminal of the heating body.
9. The fresh air switch of claim 1, wherein: the controller also comprises a buzzer connected to the signal output port of the controller.
10. The fresh air switch of claim 1, wherein: the controller also comprises a reset key connected to the signal input port of the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921340875.0U CN210512047U (en) | 2019-08-16 | 2019-08-16 | New trend switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921340875.0U CN210512047U (en) | 2019-08-16 | 2019-08-16 | New trend switch |
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| Publication Number | Publication Date |
|---|---|
| CN210512047U true CN210512047U (en) | 2020-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921340875.0U Active CN210512047U (en) | 2019-08-16 | 2019-08-16 | New trend switch |
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| Country | Link |
|---|---|
| CN (1) | CN210512047U (en) |
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2019
- 2019-08-16 CN CN201921340875.0U patent/CN210512047U/en active Active
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