CN211854525U - A compressor control system and a large-scale temperature-regulated air conditioner - Google Patents

Abstract

The utility model discloses a control system of a compressor and an air conditioner with large-range temperature adjustment, wherein the control system comprises a power supply, the compressor, a mainboard and a first temperature sensor, and the power supply is used for generating power supply input voltage; a power supply voltage input circuit is arranged between the compressor and the power supply; the main board is electrically connected with the power supply voltage input circuit, and is used for controlling the on-off of the power supply voltage input circuit when the main board works; first temperature sensor is used for detecting indoor temperature, and first temperature sensor is connected with the mainboard electricity, and just transmits the signal of telecommunication to the mainboard, and first temperature sensor electricity is connected with first definite value resistance. The utility model discloses can ensure that the mainboard can control mains voltage input circuit intercommunication equally when indoor temperature is less than 0 ℃ for the compressor normally works when indoor temperature is less than 0 ℃, provides the condition for reforming into the air conditioner that has freezing function with ordinary air conditioner.

Description

A compressor control system and a large-scale temperature-regulated air conditioner

technical field

The utility model relates to the technical field of refrigeration equipment, in particular to a compressor control system and a large-scale temperature-regulated air conditioner.

Background technique

The principle of air conditioning is that the compressor compresses the gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant and sends it to the outdoor unit condenser as a liquid refrigerant. The gaseous refrigerant returns to the compressor to continue to compress and continue to circulate for refrigeration.

An existing air conditioner can achieve the function of freezing after being improved, that is, the lowest refrigeration temperature can be reached below zero degrees Celsius, but as shown in Figure 1, the compressor of the existing air conditioner is electrically connected with a main board, and the main board is electrically connected with a Indoor ambient temperature NTC (NTC is the abbreviation of negative temperature coefficient thermistor), indoor ambient temperature NTC according to the set working state, with the detected changes in the temperature of the indoor environment to deliver different resistance values to automatically start and stop or frequency conversion. When the indoor ambient temperature NTC used in the existing air conditioner is lower than 15°C, the resistance value of the indoor ambient temperature NTC becomes larger, resulting in a low-level signal transmitted to the main board to control the compressor to stop working, that is, to compress the compressor. The air conditioner does not work when the ambient temperature is lower than 15°C, which cannot meet the needs of transforming ordinary household air conditioners into subzero temperatures in a small confined space to achieve the freezing function.

SUMMARY OF THE INVENTION

The present invention aims to solve one of the above-mentioned technical problems in the related art at least to a certain extent. Therefore, the present invention provides a compressor control system and a large-scale temperature-adjusting air conditioner, which can make the compressor work normally when the indoor temperature is lower than 0°C, and realize the transformation of the ordinary air conditioner into a refrigeration function.

A compressor control system according to an embodiment of the first aspect of the present utility model includes a power source, the power source is used to generate a power source input voltage; a compressor, a power source voltage input is provided between the compressor and the power source circuit; a mainboard, which is electrically connected to the power supply voltage input circuit, and is used to control the on-off of the power supply voltage input circuit during operation; a first temperature sensor, which is used to detect Indoor temperature, the first temperature sensor is electrically connected with the main board, and transmits electrical signals to the main board, and the first temperature sensor is electrically connected with a first constant-value resistor.

A control system for a compressor according to an embodiment of the present invention has at least the following technical effects: by electrically connecting the first temperature sensor with a first constant-value resistor, the resistance value of the first constant-value resistor is constant, and compared with the existing The resistance value of the indoor ambient temperature NTC decreases with the increase of temperature, and increases with the decrease of temperature. The resistance value of the first fixed-value resistor corresponding to the first temperature sensor will not change with the increase or decrease of temperature. , so that the electrical signal transmitted by the first temperature sensor to the main board is always a high-level signal, so that the main board will not control the power supply voltage input circuit to disconnect when the indoor temperature drops below 15 °C; At 0°C, the power supply voltage input circuit can be controlled to be connected, so that the compressor can work normally when the indoor temperature is lower than 0°C, which provides conditions for transforming ordinary air conditioners into air conditioners with refrigeration functions.

According to some embodiments of the present invention, one end of the first temperature sensor is provided with a first temperature sensing head, the first constant-value resistor is set in the first temperature sensing head, and the first temperature sensor is provided with a first temperature sensing head. A first male plug is disposed at one end away from the first temperature sensing head; and a first female plug matched with the first male plug is disposed on the main board.

According to some embodiments of the present invention, the resistance of the first constant-value resistor is equal to the resistance of the indoor ambient temperature NTC at 25°C.

According to some embodiments of the present invention, the power supply voltage input circuit is provided with a first relay, and the first relay is electrically connected between the main board and the compressor. When powered on, the main board controls the first relay. A relay closes so that the compressor is connected to the power supply via the power supply voltage input circuit.

According to some embodiments of the present invention, an intelligent temperature control switch is connected in series with the circuit between the power supply and the first temperature sensor. When the indoor temperature reaches the set refrigeration temperature, the intelligent temperature control switch controls the The compressor stops working.

According to some embodiments of the present invention, a tube temperature sensor for detecting the temperature of the tube wall of the evaporator and/or the condenser is further included, the tube temperature sensor is provided with a second constant value resistor, and the tube temperature sensor is connected to the The mainboard is electrically connected, and electrical signals are transmitted to the mainboard.

According to some embodiments of the present invention, a third temperature sensor for detecting the temperature of the aluminum fins of the evaporator and/or the condenser is further included, the third temperature sensor is electrically connected with a third constant value resistor, the The third temperature sensor is electrically connected to the mainboard and transmits electrical signals to the mainboard.

According to some embodiments of the present invention, one end of the tube temperature sensor is provided with a tube temperature sensing head, the second constant value resistor is set in the tube temperature sensing head, and the other end of the tube temperature sensor is connected with a tube temperature sensing head. A second male plug, the motherboard is provided with a second female plug matching the second male plug; one end of the third temperature sensor is provided with a third temperature sensing head, and the third fixed-value resistor is provided with In the third temperature sensing head, the other end of the third temperature sensor is electrically connected to the second male plug.

According to some embodiments of the present invention, the resistance of the second fixed-value resistor is equal to the resistance of the tube temperature NTC at 25°C; the resistance of the third fixed-value resistor is equal to the resistance of the tube temperature NTC at 25°C resistance.

According to the embodiment of the second aspect of the present invention, a large-scale temperature-regulated air conditioner includes a compressor, an evaporator, and a condenser that are connected in sequence through pipes to form a circulation loop, and the evaporator and the condenser are arranged between With an expansion valve, the compressor is controlled by one of the control systems described above.

A large-scale temperature-adjusting air conditioner according to an embodiment of the present invention has at least the following technical effects: by electrically connecting the first temperature sensor with a first constant-value resistor, the resistance value of the first constant-value resistor is constant, which is relatively higher than the current value. Some indoor ambient temperature NTC resistance decreases with the increase of temperature, and increases with the decrease of temperature. The resistance value of the first fixed-value resistor corresponding to the first temperature sensor will not occur with the increase or decrease of temperature. Changed so that the electrical signal transmitted by the first temperature sensor to the main board is always a high-level signal, so that the main board will not be disconnected from the control power supply voltage input circuit when the indoor temperature drops below 15 °C; When the temperature is lower than 0°C, the power supply voltage input circuit can be controlled to be connected, so that the compressor can work normally when the indoor temperature is lower than 0°C, so that the air conditioner of the embodiment of the present invention can cool the indoor temperature to below 0°C, and the temperature adjustment range Compared with the existing ordinary household air conditioner, the air conditioner of the embodiment of the present invention can not only realize the function of ordinary refrigeration, but also can realize refrigeration to minus 20°C in a small closed space to be used as a refrigerator.

Additional aspects and advantages of the invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments in conjunction with the accompanying drawings, wherein:

1 is a schematic diagram of a control circuit for a compressor in an existing air conditioner;

2 is a schematic diagram of the assembly structure of the main board and the first temperature sensor in the embodiment of the present invention;

3 is a schematic diagram of the assembly structure of the main board, the tube temperature sensor, the third temperature sensor and the evaporator in the embodiment of the present invention;

Fig. 4 is the principle schematic diagram of the embodiment of the present utility model;

5 is a schematic diagram of a control circuit for a compressor in an embodiment of the present invention.

Reference number:

1-Indoor ambient temperature NTC; 2-Tube temperature NTC;

100-mainboard, 110-first female plug, 120-second female plug;

200-first temperature sensor, 210-first temperature sensing head, 220-first male plug, 230-first constant-value resistor;

300 evaporators;

400-tube temperature sensor, 410-tube temperature sensor, 420-second male plug;

500- the third temperature sensor, 510- the third sensor, 520- the second constant value resistor;

600-power;

700 - compressor;

800-power supply voltage input circuit, 810-first relay;

900-Intelligent temperature control switch.

Detailed ways

This part will describe the specific embodiments of the present invention in detail, and the preferred embodiments of the present invention are shown in the accompanying drawings. Understand each technical feature and overall technical solution of the present invention, but it should not be construed as a limitation on the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by "up", "down", "front", "rear", "left", "right", etc. Based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot It is understood as a limitation of the present invention.

In the description of the present invention, if there is a description of "first", "second", "third", etc., it is only for the purpose of distinguishing technical features, and should not be understood as indicating or implying relative importance or implicitly indicating The number of the indicated technical features or implicitly indicates the order of the indicated technical features.

In the description of the present invention, unless otherwise clearly defined, words such as setting, installation, connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution .

2, 4 and 5, a compressor control system according to an embodiment of the present invention includes a power source 600, a compressor 700, a main board 100 and a first temperature sensor 200, and the power source 600 is used to generate power input voltage; a power supply voltage input circuit 800 is provided between the compressor 700 and the power supply 600; the main board 100 is electrically connected to the power supply voltage input circuit 800, and the main board 100 is used to control the on-off of the power supply voltage input circuit 800 during operation; the first temperature The sensor 200 is used to detect the indoor temperature. The first temperature sensor 200 is electrically connected to the mainboard 100 and transmits electrical signals to the mainboard 100 . The first temperature sensor 200 is electrically connected with a first constant-value resistor 230 . Compared with the prior art, in the embodiment of the present invention, by electrically connecting the first temperature sensor 200 with a first constant-value resistor 230, the resistance value of the first constant-value resistor 230 is constant, which is relatively higher than that of the existing indoor ambient temperature NTC1. The resistance value decreases as the temperature increases, and increases as the temperature decreases, the resistance value of the first constant-value resistor 230 corresponding to the first temperature sensor 200 will not change with the increase or decrease in temperature, so that the first constant value resistor 230 will not change as the temperature increases or decreases. The electrical signal transmitted by the temperature sensor 200 to the main board 100 is always a high-level signal, so that the main board 100 will not control the power supply voltage input circuit 800 to be disconnected when the indoor temperature drops below 15°C; When the temperature is lower than 0°C, the power supply voltage input circuit 800 can be controlled to be connected, so that the compressor 700 can work normally when the indoor temperature is lower than 0°C, which provides conditions for transforming an ordinary air conditioner into an air conditioner with a refrigeration function.

In some embodiments of the present invention, one end of the first temperature sensor 200 is provided with the first temperature sensing head 210 , the first constant-value resistor 230 is arranged in the first temperature sensing head 210 , and the first temperature sensor 200 is far away from the first temperature sensing head 210 . One end of a temperature sensing head 210 is provided with a first male plug 220 ; In this way, the first male plug 220 and the first female plug 110 are plugged and matched, so that the first temperature sensor 200 can be electrically connected to the main board 100, and the first temperature sensor 200 can transmit electrical signals to the main board 100 through the data cable, and the transmission is stable. , and easy to disassemble and assemble, easy to maintain and replace; at the same time, the first constant value resistor 230 is arranged in the first temperature sensing head 210, which can further miniaturize the structure of the first temperature sensor 200, and can avoid the first constant value resistor. The 230 is exposed on the outer surface and is easily damaged.

In some embodiments of the present invention, the resistance of the first constant-value resistor 230 is equal to the resistance of the indoor ambient temperature NTC1 at 25°C. The indoor ambient temperature NTC1 is a temperature sensor used to detect the indoor temperature on the existing ordinary household air conditioners on the market. The resistance value of the indoor ambient temperature NTC1 decreases as the temperature increases, and increases as the temperature decreases. In a certain working state, the temperature of the indoor environment is detected, and the main board 100 controls the compressor 700 to automatically start and stop or frequency conversion. It is worth noting that the temperature setting range of the indoor ambient temperature NTC1 is generally between 15°C and 30°C, so the cooling does not work when the ambient temperature is lower than 15°C, and the heating does not work when the ambient temperature is higher than 30°C. Among them, the industry calls the resistance value of the indoor ambient temperature NTC1 of the air conditioner at 25°C as the nominal value, that is, the resistance value of the indoor ambient temperature NTC1 at 25°C, so that the electrical signal transmitted to the main board 100 is always at a high level, During the normal process of the compressor 700, by setting the resistance value of the first constant value resistor 230 to be equal to the resistance value of the indoor ambient temperature NTC1 at 25°C, the resistance value of the first constant value resistor 230 is constant and will not change with the indoor temperature. The electrical signal transmitted by the first temperature sensor 200 to the main board 100 is always at a high level, ensuring that the main board 100 can control the power supply voltage input circuit 800 to connect even when the indoor temperature is lower than 0°C, so that the compressor 700 It works normally when the indoor temperature is lower than 0°C, which provides conditions for transforming ordinary air conditioners into air conditioners with refrigeration function.

In some embodiments of the present invention, the power supply voltage input circuit 800 is provided with a first relay 810, and the first relay 810 is electrically connected between the main board 100 and the compressor 700. When the main board 100 is powered on, the main board 100 controls the first relay 810 to close, The compressor 700 is connected to the power source 600 via the power source voltage input circuit 800 . The first relay 810 is a normally open relay, the main board 100 is not energized, the first relay 810 is not closed, the power supply voltage input circuit 800 makes the compressor 700 stop working, when the main board 100 is powered on, the first relay 810 is closed, and the power supply voltage input circuit 800 connected, so that the compressor 700 works normally. The mainboard 100 is powered on according to the electrical signal transmitted by the first temperature sensor 200, and then controls the compressor 700 to work normally or stop working. Preferably, the mainboard 100 is provided with a CPU electrically connected to the first temperature sensor 200, and the CPU receives the first temperature The electrical signal transmitted by the sensor 200 controls the opening and closing of the first relay 810 . The CPU receives signals quickly and responds quickly, and can accurately and quickly judge the electrical signal transmitted by the first temperature sensor 200 and control the first relay 810 to close or open, thereby automatically controlling the compressor 700 to start or stop.

As shown in FIG. 4, an intelligent temperature control switch 900 is connected in series with the circuit between the power supply 600 and the first temperature sensor 200. When the indoor temperature reaches the set cooling temperature, the intelligent temperature control switch 900 controls the compressor 700 to stop working . The intelligent temperature control switch 900 selects the existing models on the market. The intelligent temperature control switch 900 can input the cooling temperature value to its internal control software through the buttons. The intelligent temperature control switch 900 can also automatically detect the indoor temperature value. When the indoor temperature When the value drops to be equal to the set cooling temperature value, the intelligent temperature control switch 900 is turned off, so that the power supply voltage is input to the circuit 800, thereby causing the compressor 700 to stop working. It is convenient to accurately control the indoor temperature and refrigerate to the required refrigeration temperature, so as to meet the temperature requirements of freezing different products. As shown in FIG. 4 , specifically, the smart temperature control switch 900 is plugged into the household socket, and then the air conditioner plug is inserted into the smart temperature control switch 900; The household socket refers to the interface connected to the power supply 600, the smart temperature control switch 900 is plugged into the household socket, and then the air conditioner plug is inserted into the smart temperature control switch 900 to realize the connection between the air conditioner and the household circuit.

As shown in FIG. 3 , in some embodiments of the present invention, a tube temperature sensor 400 for detecting the tube wall temperature of the evaporator 300 and/or the condenser is further included, and the tube temperature sensor 400 is provided with a second fixed-value resistor 520 , the tube temperature sensor 400 is electrically connected to the mainboard 100 and transmits electrical signals to the mainboard 100 . Because the resistance value of the tube temperature NTC2 used to detect the tube wall temperature of the evaporator 300 and/or the condenser on the existing ordinary household air conditioner decreases with the increase of the temperature, and increases with the decrease of the temperature, when the temperature of the tube temperature drops When the temperature is below 5°C, the resistance value of the tube temperature NTC2 increases as the temperature decreases, so that the electrical signal transmitted to the main board 100 is a low-level signal, and the main board 100 controls the compressor 700 to stop working, that is, the compressor 700 is in the evaporator. 300 and/or when the temperature of the tube wall of the condenser is lower than 5°C, the refrigeration does not work. In order to realize the normal operation of the compressor 700 when the tube wall temperature is lower than 0°C, a second fixed value resistor is set in the tube temperature sensor 400 520, the resistance value of the second fixed-value resistor 520 will not change with the change of the tube wall temperature, so that the electrical signal transmitted by the tube temperature sensor 400 to the main board 100 is always a high-level signal, so that the main board 100 will not After the tube wall temperature of the evaporator 300 and/or the condenser drops below 5°C, the control power supply voltage input circuit 800 is disconnected; it is ensured that the main board 100 can control the power supply voltage input circuit 800 to be connected even when the tube wall temperature is lower than 0°C, The compressor 700 can work normally when the tube wall temperature is lower than 0°C, which provides conditions for transforming the ordinary air conditioner into an air conditioner with a refrigeration function.

As shown in FIG. 3 , in some embodiments of the present invention, a third temperature sensor 500 for detecting the temperature of the aluminum fins of the evaporator 300 and/or the condenser is further included, and the third temperature sensor 500 is electrically connected with the third temperature sensor 500 . Three fixed-value resistors, the third temperature sensor 500 is electrically connected to the mainboard 100 and transmits electrical signals to the mainboard 100 . Since the resistance value of the sheet temperature NTC used to detect the temperature of the aluminum fins of the evaporator 300 and/or the condenser on the existing ordinary household air conditioner decreases with the increase of the temperature, and increases with the decrease of the temperature, when the aluminum fins When the temperature drops below 5°C, the resistance value of the chip temperature NTC increases as the temperature decreases, so that the electrical signal transmitted to the main board 100 is a low-level signal, and the main board 100 controls the compressor 700 to stop working, that is, the compressor 700 Refrigeration does not work when the temperature of the aluminum fins of the evaporator 300 and/or the condenser is lower than 5°C. In order to realize the normal operation of the compressor 700 when the temperature of the aluminum fins is lower than 0°C, the third temperature sensor A third fixed-value resistor is set in 500, and the resistance value of the third fixed-value resistor will not change with the temperature of the aluminum fin, so that the electrical signal transmitted by the third temperature sensor 500 to the main board 100 is always at a high level signal, so that the main board 100 will not be disconnected from the control power supply voltage input circuit 800 when the temperature of the aluminum fins of the evaporator 300 and/or the condenser drops below 5°C; Even at 0°C, the power supply voltage input circuit 800 can be controlled to be connected, so that the compressor 700 can work normally when the tube wall temperature is lower than 0°C, providing conditions for transforming an ordinary air conditioner into an air conditioner with a refrigeration function.

As shown in FIG. 3 , in some embodiments of the present invention, one end of the tube temperature sensor 400 is provided with a tube temperature sensing head 410 , and the second fixed-value resistor 520 is set in the tube temperature sensing head 410 . The other end is connected with a second male plug 420, and the motherboard 100 is provided with a second female plug 120 matching the second male plug 420; one end of the third temperature sensor 500 is provided with a third temperature sensing head, a third constant value resistor Disposed in the third temperature sensing head, the other end of the third temperature sensor 500 is electrically connected to the second male plug 420 . With this arrangement, the tube temperature sensor 400 and the third temperature sensor 500 can be electrically connected to the main board 100 at the same time by simply plugging and mating the second male plug 420 and the second female plug 120 , which can reduce the number of plugs and is convenient for The layout of the wires makes the embodiment of the present utility model more concise and easy to maintain.

In some embodiments of the present invention, the resistance of the second fixed-value resistor 520 is equal to the resistance of the tube temperature NTC2 at 25°C; the resistance of the third fixed-value resistor is equal to the resistance of the tube temperature NTC2 at 25°C . The tube temperature NTC2 is a temperature sensor used to detect the tube wall temperature of the evaporator 300 and/or the condenser on the existing ordinary household air conditioners on the market. The resistance value of the tube temperature NTC2 decreases as the temperature increases, and increases as the temperature decreases. Large, the tube temperature NTC2 detects the tube wall temperature of the evaporator 300 and/or the condenser according to the set working state, and controls the compressor 700 to automatically switch on and off or frequency conversion through the main board 100 . It is worth noting that the temperature setting range is generally between 5 °C and 30 °C, so the cooling will not work when the tube wall temperature is lower than 5 °C, and the heating will not work when the tube wall temperature is higher than 30 °C. The resistance value of the tube temperature NTC2 of the air conditioner at 25°C is called the nominal value, that is, the resistance value of the tube temperature NTC2 at 25°C, so that the electrical signal transmitted to the main board 100 is always at a high level, and the compressor 700 operates normally. , by setting the resistance of the second fixed-value resistor 520 and the third fixed-value resistor to be equal to the resistance value of the tube temperature NTC2 at 25°C, the resistance of the second fixed-value resistor 520 and the third fixed-value resistor is constant, It will not change with the temperature of the tube wall and the temperature of the aluminum fins, so that the electrical signals transmitted by the tube temperature sensor 400 and the third temperature sensor 500 to the main board 100 are always at a high level, ensuring that the main board 100 can maintain the temperature of the tube wall. And/or when the temperature of the aluminum fins is lower than 0°C, the power supply voltage input circuit 800 can be controlled to be connected, so that the compressor 700 can work normally when the temperature of the tube wall and/or the temperature of the aluminum fins is lower than 0°C. The air conditioner is transformed into an air conditioner with a refrigeration function to provide conditions.

As shown in Figure 1, the NTC commonly used in air conditioners includes three air conditioner sensors: indoor ambient temperature NTC1, indoor coil temperature NTC2, and aluminum fin sheet temperature NTC. In the circuit of NTC, the change of temperature makes the resistance value of NTC change, and the voltage of CPU terminal also changes accordingly. The CPU determines the working state of the air conditioner according to the change of voltage. The working principle of the air conditioner temperature sensor: After the air conditioner temperature sensor is connected in series with a resistor, the voltage of 5V (+3.3V used by some air conditioners) is divided, and the divided voltage is sent to the CPU. Because the air conditioner temperature sensor uses a negative temperature coefficient thermistor, that is, its resistance decreases when the temperature increases, and its resistance increases when the temperature decreases. Therefore, the input voltage rule of the CPU is: when the temperature increases, the input voltage of the CPU increases, and when the temperature decreases, the input voltage of the CPU decreases accordingly. This changed voltage enters the CPU's internal analysis and processing to determine the current tube temperature or room temperature, and controls the operating state of the air conditioner through internal programs and manual settings. Since the sampling voltage sent to the CPU will vary in a wide range with the temperature change, the manufacturer generally takes 25 degrees as the standard when designing, and designs the sampling voltage to be half of the power supply voltage, so as to reduce the temperature caused by the temperature change. There is ample room for voltage changes to hatch. If the sampling voltage is designed to be too high or too low, the current temperature change will not be reflected normally. Therefore, as shown in FIG. 5 , in the embodiment of the present invention, the resistance value of the indoor ambient temperature NTC1 is replaced by the first constant value resistor 230, and the resistance value of the tube temperature NTC2 is replaced by the second constant value resistor 520, thereby improving the present invention. The resistance of the air conditioner temperature sensor in the control system of the utility model is constant, that is, its resistance value will not change with the change of temperature, so that the voltage of the CPU terminal will not change with the change of temperature, so that the compressor 700 will not change with the temperature. It works normally when the indoor temperature is lower than 0℃, which provides conditions for transforming ordinary air conditioners into air conditioners with refrigeration function. The specific refrigeration temperature is accurately controlled by the intelligent temperature control switch 900 .

Referring to FIGS. 2 to 5 , a large-scale temperature-adjusting air conditioner according to the second aspect of the present invention includes a compressor 700 , an evaporator 300 and a condenser that are sequentially connected to form a circulation loop through pipes, and the evaporator An expansion valve is arranged between 300 and the condenser, and the compressor 700 is controlled by any one of the above-mentioned control systems. Compared with the prior art, in the embodiment of the present invention, by electrically connecting the first temperature sensor 200 with a first constant-value resistor 230, the resistance value of the first constant-value resistor 230 is constant, which is relatively higher than that of the existing indoor ambient temperature NTC1. The resistance value decreases as the temperature increases, and increases as the temperature decreases, the resistance value of the first constant-value resistor 230 corresponding to the first temperature sensor 200 will not change with the increase or decrease in temperature, so that the first constant value resistor 230 will not change as the temperature increases or decreases. The electrical signal transmitted by the temperature sensor 200 to the main board 100 is always a high-level signal, so that the main board 100 will not control the power supply voltage input circuit 800 to be disconnected when the indoor temperature drops below 15°C; When the temperature is lower than 0°C, the power supply voltage input circuit 800 can be controlled to be connected, so that the compressor 700 works normally when the indoor temperature is lower than 0°C, so that the air conditioner according to the embodiment of the present invention can cool the indoor temperature to below 0°C and adjust The temperature range is wide. Compared with the existing ordinary household air conditioners, the air conditioner of the embodiment of the present invention can not only realize the function of ordinary refrigeration, but also can be used as a freezer in a small closed space to minus 20°C, reducing the need to purchase refrigerators separately. cost of the machine.

In some embodiments of the present invention, the evaporator 300 is a fin type evaporator, and the condenser is a fin type condenser. The finned condenser and the finned evaporator have good heat exchange effect, improve energy efficiency, and are convenient for the tube temperature sensor 400 and the third temperature sensor 500 to detect the temperature of the copper tube wall and the temperature of the aluminum fins, respectively.

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and changes; all within the spirit and principles of the present utility model Any modification, equivalent replacement, improvement, etc. made within the scope of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. a control system of a compressor, is characterized in that, comprises: a power supply (600) for generating a power supply input voltage; a compressor (700), a power supply voltage input circuit (800) is provided between the compressor (700) and the power supply (600); a mainboard (100) electrically connected to the power supply voltage input circuit (800), and during operation, the mainboard (100) is used to control the on-off of the power supply voltage input circuit (800); a first temperature sensor (200) for detecting indoor temperature, the first temperature sensor (200) is electrically connected to the main board (100), and transmits an electrical signal to the main board (100), the first temperature sensor (200) is electrically connected to the main board (100) The sensor (200) is electrically connected with a first constant-value resistor (230). 2. A compressor control system according to claim 1, characterized in that, a first temperature sensing head (210) is provided at one end of the first temperature sensor (200), and the first constant-value resistor (230) is disposed in the first temperature sensing head (210), and a first male plug (220) is provided at the end of the first temperature sensor (200) away from the first temperature sensing head (210); The main board (100) is provided with a first female plug (110) matching the first male plug (220). 3 . The control system for a compressor according to claim 1 , wherein the resistance of the first constant-value resistor ( 230 ) is equal to the resistance of the indoor ambient temperature NTC at 25° C. 4 . 4. A compressor control system according to claim 1, wherein the power supply voltage input circuit (800) is provided with a first relay (810), and the first relay (810) is electrically connected to Between the main board (100) and the compressor (700), when the power is on, the main board (100) controls the first relay (810) to close, so that the compressor (700) passes through the power supply voltage An input circuit (800) is connected to the power supply (600). 5. A compressor control system according to claim 1, characterized in that an intelligent temperature control switch (900) is connected in series on the circuit between the power supply (600) and the first temperature sensor (200). ), when the indoor temperature reaches the set refrigeration temperature, the intelligent temperature control switch (900) controls the compressor (700) to stop working. 6. A control system for a compressor according to claim 1, characterized in that, further comprising a tube temperature sensor (400) for detecting the temperature of the tube wall of the evaporator (300) and/or the condenser, and the tube temperature sensor (400) A second constant-value resistor (520) is arranged in the temperature sensor (400), and the tube temperature sensor (400) is electrically connected to the mainboard (100) and transmits electrical signals to the mainboard (100). 7. A compressor control system according to claim 6, further comprising a third temperature sensor (500) for detecting the temperature of the aluminum fins of the evaporator (300) and/or the condenser The third temperature sensor (500) is electrically connected with a third fixed-value resistor, the third temperature sensor (500) is electrically connected with the mainboard (100), and transmits electrical signals to the mainboard (100). 8. A compressor control system according to claim 7, characterized in that, one end of the tube temperature sensor (400) is provided with a tube temperature sensing head (410), and the second fixed-value resistor (520) ) is arranged in the tube temperature sensing head (410), the other end of the tube temperature sensor (400) is connected with a second male plug (420), and the main board (100) is provided with a connection with the second male plug (420). A second female plug (120) matched with the plug (420); a third temperature sensing head is provided at one end of the third temperature sensor (500), and the third fixed-value resistor is provided on the third temperature sensing head Inside, the other end of the third temperature sensor (500) is electrically connected to the second male plug (420). 9 . The control system for a compressor according to claim 7 , wherein the resistance of the second fixed-value resistor ( 520 ) is equal to the resistance of the tube temperature NTC at 25° C.; the third fixed-value resistor (520) The resistance value of the fixed value resistor is equal to the resistance value of the tube temperature NTC at 25℃. 10. A large-scale temperature-adjusting air conditioner, characterized in that it comprises a compressor (700), an evaporator (300), and a condenser that are sequentially connected to form a circulation loop through pipes, wherein the evaporator (300) is connected to the condenser. An expansion valve is arranged between the compressors, and the compressor (700) is controlled by a control system according to any one of the above claims 1 to 9.

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