Air conditioner energy efficiency detection device

Abstract

The utility model discloses an air conditioner energy efficiency detection device which comprises a power conversion circuit matched with an air conditioner, a single chip microcomputer processing circuit and an alarm circuit, the single chip microcomputer processing circuit and the alarm circuit are both electrically connected with the power conversion circuit, and the alarm circuit is electrically connected with the single chip microcomputer processing circuit. The power conversion circuit comprises a power conversion chip U1, and a pin 1 of the power conversion chip U1 is electrically connected with a pin 1 of a power connector J1. By detecting the temperature and humidity values of air at the air inlet and the air outlet of the air conditioner in real time and calculating the energy efficiency ratio of the air conditioner in real time according to the air speed of the air outlet, when the energy efficiency ratio exceeds a normal range, alarm information can be sent to remind a user, and the user can conveniently know the reason for troubleshooting in time, so that the air conditioner is protected, and the purposes of saving energy and protecting environment are achieved. And the working efficiency of the air conditioner is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioner energy efficiency detection, in particular to an air conditioner energy efficiency detection device. Background Technique

[0002] The energy efficiency of an air conditioner refers to the proportional relationship between the electrical energy consumed by the air conditioner device during operation and its cooling or heating effect. The higher the energy efficiency, the less electrical energy the air conditioner consumes per unit time, and the better the cooling or heating effect. Usually, the energy efficiency level of an air conditioner is measured by the energy efficiency ratio, which is the ratio of the cooling capacity of the air conditioner to the input power under specific conditions. Improving the energy efficiency of an air conditioner can not only reduce energy consumption and electricity bills, but also reduce the impact on the environment and greenhouse gas emissions. In the prior art, some problems often occur during the operation of air conditioners, such as poor cooling effect, excessive noise, frequent automatic on-off, water droplet leakage, odor problems, high power consumption, refrigerant leakage, and filter clogging. These problems may lead to a decline in the performance and energy efficiency of the air conditioner, or even prevent it from working properly. When problems occur during the operation of the air conditioner, personnel cannot detect them in time and need to go to the site for detection. For some large air conditioner devices or in the case of unattended operation, it will cause great economic losses. Considering the above situation, this application proposes an air conditioner energy efficiency detection device. Content of the Utility Model

[0003] The purpose of the utility model is to solve the deficiencies existing in the prior art and propose an air conditioner energy efficiency detection device.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An air conditioner energy efficiency detection device includes a power conversion circuit, a single-chip microcomputer processing circuit, and an alarm circuit that cooperate with the air conditioner. The single-chip microcomputer processing circuit and the alarm circuit are both electrically connected to the power conversion circuit, and the alarm circuit is electrically connected to the single-chip microcomputer processing circuit.

[0006] The power conversion circuit includes a power conversion chip U1. The pin 1 of the power conversion chip U1 is electrically connected to the pin 1 of the power connector J1. The pin 1 of the power connector J1 and the pin 1 of the power conversion chip U1 are also electrically connected to the pin 2 of the capacitor C1 and the pin 2 of the capacitor C2. The pin 3 of the power conversion chip U1 is electrically connected to the pin 2 of the capacitor C3 and the pin 2 of the capacitor C4. The pin 2 of the power connector J1, the pin 1 of the capacitor C1, the pin 1 of the capacitor C2, the pin 2 of the power conversion chip U1, the pin 1 of the capacitor C3, and the pin 1 of the capacitor C4 are all grounded.

[0007] The single-chip microcomputer processing circuit includes a single-chip microcomputer U2, a terminal block J2, a terminal block J3, and a terminal block J4. The pin 1 of the terminal block J2 is electrically connected to the pin 1 of a resistor R1 and the pin 1 of a capacitor C5. The pin 2 of the resistor R1 is electrically connected to the pin 13 of the single-chip microcomputer U2 and the pin 2 of the terminal block J2. The pin 2 of the capacitor C5 and the pin 4 of the terminal block J2 are both grounded. The terminal block J2 is electrically connected to a temperature and humidity sensor 1;

[0008] The pin 1 of the terminal block J3 is electrically connected to the pin 1 of a resistor R2 and the pin 1 of a capacitor C6. The pin 2 of the resistor R2 is electrically connected to the pin 12 of the single-chip microcomputer U2 and the pin 2 of the terminal block J3. The pin 2 of the capacitor C6 and the pin 4 of the terminal block J3 are both grounded. The terminal block J3 is electrically connected to a temperature and humidity sensor 2;

[0009] The pin 14 of the single-chip microcomputer U2 is grounded. The pin 1 of the terminal block J4 is electrically connected to the pin 1 of a capacitor C7. The pin 2 of the capacitor C7 and the pin 3 of the terminal block J4 are both grounded. The pin 2 of the terminal block J4 is electrically connected to the pin 10 of the single-chip microcomputer U2. The terminal block J4 is electrically connected to a Hall element. The pin 1 of the terminal block J2, the pin 1 of the grounding terminal J3, the pin 1 of the single-chip microcomputer U2, and the pin 1 of the terminal block J4 are all electrically connected to the pin 3 of a power conversion chip U1;

[0010] The alarm circuit includes a buzzer LS1 and a triode Q1. The pin 2 of the triode Q1 is electrically connected to the pin 2 of a resistor R3. The pin 1 of the resistor R3 is electrically connected to the pin 9 of the single-chip microcomputer U2. The pin 3 of the triode Q1 is electrically connected to the pin A of a diode D1. The pin K of the diode D1 and the pin 1 of the buzzer LS1 are both electrically connected to the pin 3 of the power conversion chip U1. The pin 2 of the buzzer LS1 is electrically connected to the pin 3 of the triode Q1. The pin 1 of the triode Q1 is grounded.

[0011] Preferably, the model of the power conversion chip U1 is LM7805CT, and the pin 3 of the power conversion chip U1 outputs 5V direct current.

[0012] Preferably, the models of both the temperature and humidity sensor 1 and the temperature and humidity sensor 2 are DHT11, and the model of the single-chip microcomputer U2 is PIC16C505.

[0013] Preferably, the Hall element is a Hall sensor, and its model is BL-HE-ST3204.

[0014] Preferably, the pin 1 of the power supply connector J1 is electrically connected to a 24V direct current power supply, and the capacitors C1, C2, C3, and C4 are all filter capacitors.

[0015] Preferably, the temperature and humidity sensor 1 and the temperature and humidity sensor 2 are respectively located at the air inlet and the air outlet of the air conditioner, which are used to measure the temperature and humidity values at the air inlet and the air outlet of the air conditioner in real time. A small wind speed measuring fan is placed at the air outlet of the air conditioner, and a small magnet is fixed on the blade of the small wind speed measuring fan.

[0016] Compared with the existing technology, the beneficial effects of the present utility model are as follows:

[0017] The present utility model calculates the energy efficiency ratio of the air conditioner in real time by detecting the temperature and humidity values of the air at the air inlet and the air outlet of the air conditioner in real time and according to the wind speed at the air outlet. When it exceeds the normal range, an alarm message can be sent to remind the user, which is convenient for the user to timely know and check the cause of the error, so as to protect the air conditioner, achieve energy conservation and improve the working efficiency of the air conditioner. Description of the Drawings

[0018] Figure 1 It is the circuit diagram of the power conversion circuit of an air conditioner energy efficiency detection device proposed by the present utility model;

[0019] Figure 2 It is the circuit diagram of the single-chip microcomputer processing circuit of an air conditioner energy efficiency detection device proposed by the present utility model;

[0020] Figure 3 It is the circuit diagram of the alarm circuit of an air conditioner energy efficiency detection device proposed by the present utility model. Detailed Embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0022] Refer to Figures 1-3 , an air conditioner energy efficiency detection device, including a power conversion circuit, a single-chip microcomputer processing circuit and an alarm circuit that cooperate with the air conditioner. The single-chip microcomputer processing circuit and the alarm circuit are both electrically connected to the power conversion circuit, and the alarm circuit is electrically connected to the single-chip microcomputer processing circuit;

[0023] The power conversion circuit includes a power conversion chip U1, where the model of the power conversion chip U1 is LM7805CT. The pin 3 of the power conversion chip U1 outputs 5V DC power. The pin 1 of the power conversion chip U1 is electrically connected to the pin 1 of the power connector J1. The pin 1 of the power connector J1 and the pin 1 of the power conversion chip U1 are also electrically connected to the pin 2 of the capacitor C1 and the pin 2 of the capacitor C2. The pin 3 of the power conversion chip U1 is electrically connected to the pin 2 of the capacitor C3 and the pin 2 of the capacitor C4. The pin 2 of the power connector J1, the pin 1 of the capacitor C1, the pin 1 of the capacitor C2, the pin 2 of the power conversion chip U1, the pin 1 of the capacitor C3, and the pin 1 of the capacitor C4 are all grounded. The pin 1 of the power connector J1 is electrically connected to a 24V DC power supply. The capacitors C1, C2, C3, and C4 are all filter capacitors;

[0024] The single-chip microcomputer processing circuit includes a single-chip microcomputer U2, a terminal block J2, a terminal block J3, and a terminal block J4. The model of the single-chip microcomputer U2 is PIC16C505. The pin 1 of the terminal block J2 is electrically connected to the pin 1 of the resistor R1 and the pin 1 of the capacitor C5. The pin 2 of the capacitor R1 is electrically connected to the pin 13 of the single-chip microcomputer U2 and the pin 2 of the terminal block J2. The pin 2 of the capacitor C5 and the pin 4 of the terminal block J2 are both grounded. The terminal block J2 is electrically connected to a temperature and humidity sensor 1;

[0025] The pin 1 of the terminal block J3 is electrically connected to the pin 1 of the resistor R2 and the pin 1 of the capacitor C6. The pin 2 of the resistor R2 is electrically connected to the pin 12 of the single-chip microcomputer U2 and the pin 2 of the terminal block J3. The pin 2 of the capacitor C6 and the pin 4 of the terminal block J3 are both grounded. The terminal block J3 is electrically connected to a temperature and humidity sensor 2;

[0026] The models of both the temperature and humidity sensor 1 and the temperature and humidity sensor 2 are DHT11. The temperature and humidity sensor 1 and the temperature and humidity sensor 2 are respectively located at the air inlet and the air outlet of the air conditioner. They are used to measure the temperature and humidity values at the air inlet and the air outlet of the air conditioner in real time, and the temperature and humidity values at the air inlet and the air outlet are used to assist in judging the operating environment of the air conditioner and correcting the ambient air density parameters. A small wind speed measuring fan is placed at the air outlet of the air conditioner, and a small magnet is fixed on the blade of the small wind speed measuring fan;

[0027] Pin 14 of the single-chip microcomputer U2 is grounded. Pin 1 of the terminal block J4 is electrically connected to pin 1 of the capacitor C7. Pin 2 of the capacitor C7 and pin 3 of the terminal block J4 are both grounded. Pin 2 of the terminal block J4 is electrically connected to pin 10 of the single-chip microcomputer U2. The terminal block J4 is electrically connected to a Hall element, where the Hall element is a Hall sensor with the model BL-HE-ST3204. The Hall element is used to obtain the rotation speed of the small wind speed measuring fan. Pin 1 of the terminal block J2, pin 1 of the grounding terminal block J3, pin 1 of the single-chip microcomputer U2, and pin 1 of the terminal block J4 are all electrically connected to pin 3 of the power conversion chip U1;

[0028] The alarm circuit includes a buzzer LS1 and a triode Q1. Pin 2 of the triode Q1 is electrically connected to pin 2 of a resistor R3. Pin 1 of the resistor R3 is electrically connected to pin 9 of the single-chip microcomputer U2. Pin 3 of the triode Q1 is electrically connected to pin A of a diode D1. Pin K of the diode D1 and pin 1 of the buzzer LS1 are both electrically connected to pin 3 of the power conversion chip U1. Pin 2 of the buzzer LS1 is electrically connected to pin 3 of the triode Q1. Pin 1 of the triode Q1 is grounded;

[0029] The utility model calculates the energy efficiency ratio of the air conditioner in real time by detecting the temperature and humidity values of the air at the air inlet and outlet of the air conditioner in real time and according to the wind speed at the air outlet. When it exceeds the normal range, an alarm message can be sent to remind the user, which is convenient for the user to timely know and check the cause of the error and fault, so as to protect the air conditioner, achieve energy conservation, and improve the working efficiency of the air conditioner.

[0030] Working principle: When in use, the 24V DC power supply is converted into 5V DC power through the power conversion circuit to supply power to the single-chip microcomputer processing circuit and the alarm circuit. After the single-chip microcomputer U2 runs, the temperature and humidity sensors 1 and 2 are used to measure the temperature and humidity values of the air inlet and outlet of the air conditioner in real time respectively. If the ambient humidity does not meet the operating conditions of the air conditioner, the buzzer LS1 will give an alarm to remind the personnel. When detecting the wind speed, a small wind speed measuring fan is placed at the air outlet of the air conditioner. A small magnet is fixed on the fan blade of the small wind speed measuring fan. After the Hall element approaches the small magnet, the small magnet rotates with the fan blade, so that the Hall element obtains the rotation speed of the fan, and cooperates with the single-chip microcomputer U2 to be able to detect and calculate the wind speed in real time. The program is pre-compiled by the single-chip microcomputer U2, and the detected actual parameters are substituted into the energy efficiency ratio calculation formula to calculate the actual energy efficiency ratio of the air conditioner. If the obtained energy efficiency ratio exceeds the range specified by the air conditioner, the buzzer LS1 is triggered to give an alarm to remind the user to clean the air conditioner filter or check the cause of the fault in time. By detecting the operating conditions of the air conditioner in real time and calculating the energy efficiency ratio of the air conditioner, it is possible for personnel to know and check in time when the air conditioner fails, so as to improve the working efficiency of the air conditioner and achieve the effect of energy conservation;

[0031] Among them, the calculation formula for the energy efficiency ratio The derivation process is as follows:

[0032] According to the formula (1)

[0033] (2)

[0034] (3)

[0035] Substitute formula (3) and (2) into formula (1): ; Through calculation, we can obtain , this formula is the final formula for calculating the energy efficiency ratio. Substitute the actual measured parameters into , and the energy efficiency ratio of the air conditioner can be directly calculated;

[0036] In the above formula, Q is the cooling capacity, c is the specific heat of air, ρ is the air density, V is the air volume flow rate, ΔT is the temperature difference between the air inlet and outlet of the air conditioner; S is the cross-sectional area of the cold air outlet, v is the air flow velocity at the cold air outlet, Δt is the operating time in hours; T1 is the air inlet temperature of the air conditioner, T2 is the air outlet temperature of the air conditioner, and W is the refrigeration electric power of the air conditioner.

[0037] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An air conditioner energy efficiency detection device, characterized in that: It includes a power conversion circuit, a single-chip processing circuit and an alarm circuit that match the air conditioner, wherein the single-chip processing circuit and the alarm circuit are both electrically connected to the power conversion circuit, and the alarm circuit is electrically connected to the single-chip processing circuit; The power conversion circuit includes a power conversion chip U1, wherein pin 1 of the power conversion chip U1 is electrically connected to pin 1 of a power connector J1, pin 1 of the power connector J1 and pin 1 of the power conversion chip U1 are also electrically connected to pin 2 of a capacitor C1 and pin 2 of a capacitor C2, pin 3 of the power conversion chip U1 is electrically connected to pin 2 of a capacitor C3 and pin 2 of a capacitor C4, and pin 2 of the power connector J1, pin 1 of the capacitor C1, pin 1 of the capacitor C2, pin 2 of the power conversion chip U1, pin 1 of the capacitor C3, and pin 1 of the capacitor C4 are all grounded; The single-chip processing circuit includes a single-chip computer U2, a terminal J2, a terminal J3 and a terminal J4, a pin 1 of the terminal J2 is electrically connected to a pin 1 of a resistor R1 and a pin 1 of a capacitor C5, a pin 2 of the capacitor R1 is electrically connected to a pin 13 of the single-chip computer U2 and a pin 2 of the terminal J2, a pin 2 of the capacitor C5 and a pin 4 of the terminal J2 are both grounded, and the terminal J2 is electrically connected to a temperature and humidity sensor 1; Pin 1 of the terminal J3 is electrically connected to pin 1 of the resistor R2 and pin 1 of the capacitor C6, pin 2 of the resistor R2 is electrically connected to pin 12 of the microcontroller U2 and pin 2 of the terminal J3, pin 2 of the capacitor C6 and pin 4 of the terminal J3 are both grounded, and the terminal J3 is electrically connected to the temperature and humidity sensor 2; Pin 14 of the single-chip microcomputer U2 is grounded, pin 1 of terminal J4 is electrically connected to pin 1 of capacitor C7, pin 2 of capacitor C7 and pin 3 of terminal J4 are both grounded, pin 2 of terminal J4 is electrically connected to pin 10 of single-chip microcomputer U2, terminal J4 is electrically connected to a Hall element, pin 1 of terminal J2, pin 1 of ground terminal J3, pin 1 of single-chip microcomputer U2 and pin 1 of terminal J4 are all electrically connected to pin 3 of power conversion chip U1; The alarm circuit includes a buzzer LS1 and a transistor Q1, pin 2 of the transistor Q1 is electrically connected to pin 2 of the resistor R3, pin 1 of the resistor R3 is electrically connected to pin 9 of the microcontroller U2, pin 3 of the transistor Q1 is electrically connected to pin A of the diode D1, pin K of the diode D1 and pin 1 of the buzzer LS1 are both electrically connected to pin 3 of the power conversion chip U1, pin 2 of the buzzer LS1 is electrically connected to pin 3 of the transistor Q1, and pin 1 of the transistor Q1 is grounded.

2. The air conditioner energy efficiency detection device according to claim 1, characterized in that: The model of the power conversion chip U1 is LM7805CT, and the pin 3 of the power conversion chip U1 outputs 5V DC.

3. The air conditioner energy efficiency detection device according to claim 1, characterized in that: The model of the temperature and humidity sensor 1 and the temperature and humidity sensor 2 are both DHT11, and the model of the single-chip computer U2 is PIC16C505.

4. The air conditioner energy efficiency detection device according to claim 1, characterized in that: The Hall element is a Hall sensor, and its model is BL-HE-ST3204.

5. The air conditioner energy efficiency detection device according to claim 1, characterized in that: Pin 1 of the power connector J1 is electrically connected to a 24V DC power supply, and capacitors C1, C2, C3 and C4 are all filter capacitors.

6. The air conditioner energy efficiency detection device according to claim 1, characterized in that: The temperature and humidity sensor 1 and the temperature and humidity sensor 2 are respectively located at the air inlet and outlet of the air conditioner, and are used to measure the temperature and humidity values ​​of the air inlet and outlet of the air conditioner in real time. A small wind speed measuring fan is placed at the air outlet of the air conditioner, and a small magnet is fixed on the blades of the small wind speed measuring fan.

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