CN211854525U - Control system of compressor and air conditioner capable of adjusting temperature in large range - Google Patents
Control system of compressor and air conditioner capable of adjusting temperature in large range Download PDFInfo
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- CN211854525U CN211854525U CN202020182519.7U CN202020182519U CN211854525U CN 211854525 U CN211854525 U CN 211854525U CN 202020182519 U CN202020182519 U CN 202020182519U CN 211854525 U CN211854525 U CN 211854525U
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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
Technical Field
The utility model relates to a refrigeration plant technical field specifically is a control system of compressor and air conditioner that adjusts the temperature on a large scale.
Background
The principle of the air conditioner is that a compressor compresses a gaseous refrigerant into a high-temperature high-pressure gaseous refrigerant, the gaseous refrigerant is sent to an outdoor unit condenser to be a liquid refrigerant, the liquid refrigerant enters an evaporator through a capillary tube to absorb heat in indoor air and is vaporized to be changed into a gaseous refrigerant, and then the gaseous refrigerant returns to the compressor to be compressed continuously and is circulated continuously to refrigerate.
An existing air conditioner can achieve a freezing function after being well modified, that is, the lowest refrigerating temperature can be below zero degrees centigrade, but as shown in fig. 1, a compressor of the existing air conditioner is electrically connected with a main board, the main board is electrically connected with an indoor environment temperature NTC (NTC is a short for negative temperature coefficient thermistor), and the indoor environment temperature NTC transmits different resistance values along with the detected temperature change of the indoor environment according to a set working state so as to automatically start and stop the air conditioner or change the frequency of the air conditioner. When the indoor temperature of the indoor environment temperature NTC used on the existing air conditioner is lower than 15 ℃, the resistance value of the indoor environment temperature NTC is increased, so that a low level signal is transmitted to the mainboard, the compressor is controlled to stop working, namely, the compressor does not work when refrigerating at the environment temperature lower than 15 ℃, and the requirement that the refrigeration function can be realized by refrigerating the ordinary household air conditioner to the subzero temperature in a small-sized closed space can not be met.
Disclosure of Invention
The present invention aims to solve at least one of the above-mentioned technical problems in the related art to a certain extent. Therefore, the utility model provides a control system of compressor and air conditioner that adjusts the temperature on a large scale can make the compressor normally work when indoor temperature is less than 0 ℃, realizes reforming ordinary air conditioner into having freezing function.
A control system for a compressor in accordance with an embodiment of the first aspect of the present invention includes a power supply for generating a 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, first temperature sensor is used for detecting indoor temperature, first temperature sensor with the mainboard electricity is connected, and to the mainboard transmission signal of telecommunication, first temperature sensor electricity is connected with first definite value resistance.
According to the utility model discloses control system of compressor has following technological effect at least: the first temperature sensor is electrically connected with the first constant value resistor, and the resistance value of the first constant value resistor is a constant, so that compared with the characteristic that the resistance value of the existing indoor environment temperature NTC is reduced along with the temperature rise and increased along with the temperature reduction, the resistance value of the first constant value resistor corresponding to the first temperature sensor cannot be changed along with the temperature rise or temperature reduction, so that the electric signal transmitted to the mainboard by the first temperature sensor is always a high-level signal, and the mainboard cannot control the power supply voltage input circuit to be disconnected along with the indoor temperature reduction to be below 15 ℃; the mainboard can be ensured to be capable of controlling the power supply voltage input circuit to be communicated when the indoor temperature is lower than 0 ℃, so that the compressor can normally work when the indoor temperature is lower than 0 ℃, and conditions are provided for reforming a common air conditioner into an air conditioner with a freezing function.
According to some embodiments of the present invention, a first temperature sensor is disposed at one end of the first temperature sensor, the first constant resistor is disposed in the first temperature sensor, and a first male plug is disposed at one end of the first temperature sensor away from the first temperature sensor; be provided with on the mainboard with first public plug assorted first female plug.
According to some embodiments of the invention, the resistance of the first fixed value resistor is equal to the resistance of the indoor environment temperature NTC at 25 ℃.
According to some embodiments of the utility model, the mains voltage input circuit is provided with first relay, first relay electricity connect in the mainboard with between the compressor, during the circular telegram, mainboard control first relay is closed, makes the compressor via mains voltage input circuit inserts the power.
According to the utility model discloses a some embodiments, the power with it has intelligent temperature detect switch to establish ties on the circuit between the first temperature sensor, when indoor temperature reached the refrigeration temperature of settlement, intelligence temperature detect switch control the compressor stop work.
According to the utility model discloses a some embodiments, still including the pipe temperature sensor who detects the pipe wall temperature of evaporimeter and/or condenser, be provided with second definite value resistance in the pipe temperature sensor, pipe temperature sensor with the mainboard electricity is connected, and to mainboard transmission signal of telecommunication.
According to the utility model discloses a some embodiments still include the third temperature sensor who is used for detecting the temperature of the aluminium fin of evaporimeter and/or condenser, third temperature sensor electricity is connected with third definite value resistance, third temperature sensor with the mainboard electricity is connected, and to mainboard transmission electric signal.
According to some embodiments of the present invention, a tube temperature sensing head is disposed at one end of the tube temperature sensor, the second constant value resistor is disposed in the tube temperature sensing head, a second male plug is connected to the other end of the tube temperature sensor, and a second female plug matched with the second male plug is disposed on the motherboard; and one end of the third temperature sensor is provided with a third temperature sensing head, the third constant value resistor is arranged in the third temperature sensing head, and the other end of the third temperature sensor is electrically connected with the second male plug.
According to some embodiments of the invention, the resistance of the second fixed resistor is equal to the resistance of the tube temperature NTC at 25 ℃; the resistance value of the third fixed value resistor is equal to the resistance value of the tube temperature NTC at 25 ℃.
According to the utility model discloses an air conditioner that adjusts temperature on a large scale of second aspect embodiment, include and communicate compressor, evaporimeter and the condenser that forms circulation circuit through the pipeline in proper order, the evaporimeter with be provided with the expansion valve between the condenser, the compressor is by above-mentioned arbitrary a control system control.
According to the utility model discloses air conditioner that adjusts temperature on a large scale has following technological effect at least: the first temperature sensor is electrically connected with the first constant value resistor, and the resistance value of the first constant value resistor is a constant, so that compared with the characteristic that the resistance value of the existing indoor environment temperature NTC is reduced along with the temperature rise and increased along with the temperature reduction, the resistance value of the first constant value resistor corresponding to the first temperature sensor cannot be changed along with the temperature rise or temperature reduction, so that the electric signal transmitted to the mainboard by the first temperature sensor is always a high-level signal, and the mainboard cannot control the power supply voltage input circuit to be disconnected along with the indoor temperature reduction to be below 15 ℃; ensure that the mainboard can be less than 0 ℃ when indoor temperature and just can control mains voltage input circuit intercommunication for the compressor normally works when indoor temperature is less than 0 ℃, and then makes the utility model discloses the air conditioner can refrigerate the indoor temperature below 0 ℃, and the scope of adjusting temperature is wide, for current ordinary domestic air conditioner, the utility model discloses the air conditioner can realize ordinary refrigerated function, also can realize refrigerating in small-size airtight space and use as the refrigerator to 20 ℃ below zero.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic diagram of a control circuit for a compressor in a conventional air conditioner;
fig. 2 is a schematic view of an assembly structure of the main board and the first temperature sensor in the embodiment of the present invention;
FIG. 3 is a schematic view of an assembly structure of the main board, the tube temperature sensor, the third temperature sensor and the evaporator according to the embodiment of the present invention;
fig. 4 is a schematic diagram of an embodiment of the invention;
fig. 5 is a schematic diagram of a control circuit for the compressor according to an embodiment of the present invention.
Reference numerals:
1-indoor environment temperature NTC; 2-tube temperature NTC;
100-mainboard, 110-first female plug, 120-second female plug;
200-a first temperature sensor, 210-a first temperature sensing head, 220-a first male plug, 230-a first fixed value resistor;
300 an evaporator;
400-pipe temperature sensor, 410-pipe temperature sensor, 420-second male plug;
500-a third temperature sensor, 510-a third sensor, 520-a second fixed value resistor;
600-a power supply;
700-a compressor;
800-supply voltage input circuit, 810-first relay;
900-Intelligent temperature control switch.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the positional or orientational descriptions, such as "upper", "lower", "front", "rear", "left", "right", etc., are referred to the positional or orientational relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element so 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, if there are descriptions of "first", "second", "third", etc. for the purpose of distinguishing between technical features, it is not to be understood as indicating or implying relative importance or implying number of indicated technical features or implying precedence of indicated technical features.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Referring to fig. 2, 4 and 5, a control system of a compressor according to an embodiment of the present invention includes a power supply 600, a compressor 700, a main board 100 and a first temperature sensor 200, wherein the power supply 600 is configured to generate a power supply 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 with the power supply voltage input circuit 800, and when the main board 100 works, the main board 100 is used for controlling the on-off of the power supply voltage input circuit 800; the first temperature sensor 200 is used for detecting the indoor temperature, the first temperature sensor 200 is electrically connected to the motherboard 100 and transmits an electrical signal to the motherboard 100, and the first temperature sensor 200 is electrically connected to the first fixed resistor 230. Compared with the prior art, the embodiment of the present invention electrically connects the first temperature sensor 200 to the first fixed value resistor 230, the resistance value of the first fixed value resistor 230 is constant, and compared with the existing resistance value of the indoor environment temperature NTC1, the resistance value of the indoor environment temperature NTC1 decreases with the temperature increase, and increases with the temperature decrease, the resistance value of the first fixed value resistor 230 corresponding to the first temperature sensor 200 does not change with the temperature increase or temperature decrease, so that the electrical signal transmitted from the first temperature sensor 200 to the motherboard 100 is always a high level signal, and the motherboard 100 does not control the power voltage input circuit 800 to be disconnected after the indoor temperature decreases to below 15 ℃; the mainboard 100 can be ensured to control the power supply voltage input circuit 800 to be communicated when the indoor temperature is lower than 0 ℃, so that the compressor 700 can normally work when the indoor temperature is lower than 0 ℃, and conditions are provided for transforming a common air conditioner into an air conditioner with a freezing function.
In some embodiments of the present invention, a first temperature sensor 210 is disposed at one end of the first temperature sensor 200, a first fixed resistor 230 is disposed in the first temperature sensor 210, and a first male plug 220 is disposed at one end of the first temperature sensor 200 away from the first temperature sensor 210; the main board 100 is provided with a first female plug 110 matching with the first male plug 220. By means of the arrangement, the first male plug 220 is in plug-in fit with the first female plug 110, so that the first temperature sensor 200 can be electrically connected with the mainboard 100, the first temperature sensor 200 transmits an electric signal to the mainboard 100 through a data line, the transmission is stable, the assembly and disassembly are convenient, and the maintenance and the replacement are convenient; meanwhile, the first fixed resistor 230 is disposed in the first temperature sensing head 210, so that the structure of the first temperature sensor 200 can be further miniaturized, and the first fixed resistor 230 can be prevented from being exposed on the outer surface and being easily damaged.
In some embodiments of the present invention, the resistance of the first fixed resistor 230 is equal to the resistance of the indoor environment temperature NTC1 at 25 ℃. The indoor loop temperature NTC1 is a temperature sensor used for detecting indoor temperature on the common household air conditioner on the existing market, the resistance value of the indoor loop temperature NTC1 is reduced along with the temperature rise and increased along with the temperature reduction, and the indoor loop temperature NTC1 detects the temperature of the indoor environment and controls the compressor 700 to automatically start and stop or change frequency through the mainboard 100 according to the set working state. It should be noted that the temperature setting range of the indoor environment temperature NTC1 is generally between 15 ℃ and 30 ℃, so that the refrigeration does not work at the environment temperature lower than 15 ℃ and the heating does not work at the environment temperature higher than 30 ℃, wherein the resistance value of the indoor environment temperature NTC1 of the air conditioner at 25 ℃ is referred to as the nominal value, that is, the resistance value of the indoor environment temperature NTC1 at 25 ℃ makes the electrical signal transmitted to the motherboard 100 always be at the high level, the compressor 700 normally processes, by setting the resistance value of the first fixed value resistor 230 to be equal to the resistance value of the indoor environment temperature NTC1 at 25 ℃, the resistance value of the first fixed value resistor 230 is constant, and will not change with the change of the indoor temperature, so that the electrical signal transmitted from the first temperature sensor 200 to the motherboard 100 is always at the high level, the motherboard 100 can control the power voltage input circuit 800 to be connected as well when the indoor temperature is lower than 0 ℃, so that the compressor 700 normally works at the indoor temperature lower than 0 ℃, provides conditions for reforming a common air conditioner into an air conditioner with a freezing function.
In some embodiments of the present invention, the power voltage input circuit 800 is provided with a first relay 810, the first relay 810 is electrically connected between the main board 100 and the compressor 700, and when the power is turned on, the main board 100 controls the first relay 810 to be closed, so that the compressor 700 is connected to the power supply 600 via the power voltage input circuit 800. First relay 810 is normally open relay, and mainboard 100 is not circular telegram, and first relay 810 is not closed, and mains voltage input circuit 800 for compressor 700 stop work, when mainboard 100 circular telegram, first relay 810 is closed, and mains voltage input circuit 800 communicates, makes compressor 700 normally work. The main board 100 is powered on according to the electrical signal transmitted by the first temperature sensor 200, and then controls the compressor 700 to normally operate or stop operating, preferably, a CPU electrically connected to the first temperature sensor 200 is disposed on the main board 100, and the CPU receives the electrical signal transmitted by the first temperature sensor 200 and controls the on/off of the first relay 810. The CPU receives signals quickly, responds quickly, can accurately and quickly judge the electric signals transmitted by the first temperature sensor 200 and control the first relay 810 to be closed or opened, and further realizes the automatic control of the starting or stopping of the compressor 700.
As shown in fig. 4, an intelligent temperature control switch 900 is connected in series to a circuit between the power supply 600 and the first temperature sensor 200, and when the indoor temperature reaches a set cooling temperature, the intelligent temperature control switch 900 controls the compressor 700 to stop operating. The intelligent temperature control switch 900 is selected from the existing models on the market, the intelligent temperature control switch 900 can input a refrigeration temperature value to the control software inside the intelligent temperature control switch through keys, the intelligent temperature control switch 900 can automatically detect an indoor temperature value, when the indoor temperature value is reduced to be equal to the set refrigeration temperature value, the intelligent temperature control switch 900 is disconnected, the power supply voltage input circuit 800 is enabled, and the compressor 700 is enabled to stop working. The indoor temperature can be controlled accurately to the required refrigeration temperature, and the requirements of different products on refrigeration temperature can be met. As shown in fig. 4, specifically, the intelligent temperature control switch 900 is plugged into a household socket, and then an air conditioner plug is plugged into the intelligent temperature control switch 900; it can be understood that the power supply 600 refers to a 220V household circuit, the household socket refers to an interface for connecting the power supply 600, the intelligent temperature control switch 900 is plugged into the household socket, and then the air conditioner plug is plugged into the intelligent temperature control switch 900, so that the communication between the air conditioner and the household circuit can be realized.
As shown in fig. 3, in some embodiments of the present invention, a tube temperature sensor 400 for detecting the temperature of the tube wall of the evaporator 300 and/or the condenser is further included, a second fixed resistor 520 is disposed in the tube temperature sensor 400, and the tube temperature sensor 400 is electrically connected to the motherboard 100 and transmits an electrical signal to the motherboard 100. Since the resistance of the NTC2 for detecting the wall temperature of the evaporator 300 and/or the condenser decreases with the temperature increase and increases with the temperature decrease, when the temperature of the tube decreases below 5 ℃, the resistance of the NTC2 increases with the temperature decrease, so that the electrical signal transmitted to the motherboard 100 is a low level signal, the motherboard 100 controls the compressor 700 to stop working, i.e. the compressor 700 does not work when the wall temperature of the evaporator 300 and/or the condenser is lower than 5 ℃, in order to realize the normal working of the compressor 700 when the wall temperature is lower than 0 ℃, the second fixed resistor 520 is arranged in the tube temperature sensor 400, the resistance of the second fixed resistor 520 does not change with the change of the wall temperature, so that the electrical signal transmitted to the motherboard 100 by the tube temperature sensor 400 is always a high level signal, and the motherboard 100 does not control the electrical signal after the wall temperature of the evaporator 300 and/or the condenser decreases below 5 ℃ The source voltage input circuit 800 is off; the mainboard 100 can be ensured to control the power supply voltage input circuit 800 to be communicated when the temperature of the pipe wall is lower than 0 ℃, so that the compressor 700 can normally work when the temperature of the pipe wall is lower than 0 ℃, and conditions are provided for transforming a common air conditioner into an air conditioner with a freezing 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, the third temperature sensor 500 is electrically connected to a third fixed resistor, and the third temperature sensor 500 is electrically connected to the motherboard 100 and transmits an electrical signal to the motherboard 100. Since the resistance value of the sheet temperature NTC for detecting the temperature of the aluminum fins of the evaporator 300 and/or the condenser on the conventional general household air conditioner decreases with the increase of the temperature and increases with the decrease of the temperature, when the temperature of the aluminum fins decreases below 5 ℃, the resistance value of the sheet temperature NTC increases with the decrease of the temperature, so that the electric signal transmitted to the main board 100 is a low level signal, the main board 100 controls the compressor 700 to stop working, that is, the compressor 700 does not work when cooling at a temperature lower than 5 ℃ of the temperature of the aluminum fins of the evaporator 300 and/or the condenser, in order to realize the normal working of the compressor 700 at a temperature lower than 0 ℃ of the aluminum fins, the third constant value resistor is provided in the third temperature sensor 500, the resistance value of the third constant value resistor does not change with the change of the temperature of the aluminum fins, so that the electric signal transmitted to the main board 100 by the third temperature sensor 500 is always a high level signal, the main board 100 can not control the power supply voltage input circuit 800 to be disconnected after the temperature of the aluminum fins of the evaporator 300 and/or the condenser is reduced to below 5 ℃; the mainboard 100 can be ensured to control the power supply voltage input circuit 800 to be communicated when the temperature of the aluminum fins is lower than 0 ℃, so that the compressor 700 can normally work when the temperature of the pipe wall is lower than 0 ℃, and conditions are provided for reforming a common air conditioner into an air conditioner with a freezing 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, a second fixed resistor 520 is disposed in the tube temperature sensing head 410, the other end of the tube temperature sensor 400 is connected to a second male plug 420, and a second female plug 120 matched with the second male plug 420 is disposed on the motherboard 100; one end of the third temperature sensor 500 is provided with a third temperature sensing head, a third fixed value resistor is arranged in the third temperature sensing head, and the other end of the third temperature sensor 500 is electrically connected with the second male plug 420. Set up like this, only need with the cooperation of pegging graft of second male plug 420 and second female plug 120, can realize being connected pipe temperature sensor 400 and third temperature sensor 500 simultaneously with mainboard 100 electricity, can reduce the quantity of plug, and the overall arrangement of the electric wire of being convenient for, make the utility model discloses an embodiment is more succinct, also easy access.
In some embodiments of the present invention, the resistance of the second fixed resistor 520 is equal to the resistance of the tube temperature NTC2 at 25 ℃; the resistance value of the third fixed-value resistor is equal to the resistance value of the tube temperature NTC2 at 25 ℃. The tube temperature NTC2 is a temperature sensor used for detecting the tube wall temperature of the evaporator 300 and/or the condenser on the common household air conditioner on the existing market, the resistance value of the tube temperature NTC2 decreases with the temperature increase and increases with the temperature decrease, and the tube temperature NTC2 detects the tube wall temperature of the evaporator 300 and/or the condenser according to the set working state, and the compressor 700 is controlled by the mainboard 100 to automatically start and stop or change the frequency. It should be noted that the temperature setting range is generally between 5 ℃ and 30 ℃, so that the cooling operation is not performed at the temperature of the pipe wall lower than 5 ℃ and the heating operation is not performed at the temperature of the pipe wall higher than 30 ℃, wherein the resistance value of the pipe temperature NTC2 of the air conditioner at 25 ℃ is referred to as the nominal value, that is, the resistance value of the pipe temperature NTC2 at 25 ℃ makes the electrical signal transmitted to the main board 100 always be the high level, the compressor 700 normally processes, by setting the resistance values of the second fixed resistor 520 and the third fixed resistor equal to the resistance value of the pipe temperature NTC2 at 25 ℃, the resistance values of the second fixed resistor 520 and the third fixed resistor are constant and do not change with the changes of the pipe wall temperature and the temperature of the aluminum fin, so that the electrical signals transmitted to the main board 100 by the pipe temperature sensor 400 and the third temperature sensor 500 are always be the high level, it is ensured that the main board 100 can control the power supply voltage input circuit 800 to be connected as well when the temperature of the pipe wall and/or the temperature of the aluminum, so that the compressor 700 normally operates when the temperature of the pipe wall and/or the temperature of the aluminum fins is lower than 0 ℃, thereby providing conditions for reforming a common air conditioner into an air conditioner with a freezing function.
As shown in fig. 1, the NTC commonly used in the air conditioner includes three air conditioner sensors, such as an indoor loop temperature NTC1, an indoor coil temperature NTC2, and an aluminum fin sheet temperature NTC. In the circuit of NTC, the NTC resistance value is changed by the temperature change, the voltage of the CPU terminal is changed, and the CPU determines the working state of the air conditioner according to the voltage change. The working principle of the air conditioner temperature sensor is as follows: the air conditioner temperature sensor is connected with a resistor in series, then divides the voltage of 5V (the voltage of +3.3V used by part of the air conditioner), and the divided voltage is sent to the interior of the CPU. As the air conditioner temperature sensor adopts the negative temperature coefficient thermistor, namely, the resistance value is reduced when the temperature is increased, and the resistance value is increased when the temperature is reduced. Therefore, the input voltage rule of the CPU is; when the temperature rises, the input voltage of the CPU rises, and when the temperature falls, the input voltage of the CPU falls. The changed voltage enters the CPU for analysis and processing to judge the current tube temperature or room temperature, and the running state of the air conditioner is controlled by internal programs and manual settings. Since the sampling voltage supplied to the CPU varies widely according to the temperature, the manufacturer generally designs the sampling voltage to be half of the power supply voltage, based on 25 degrees, so as to provide sufficient room for the voltage variation caused by the temperature variation. If the sampling voltage is designed to be too high or too low, the current temperature change cannot be reflected normally. Therefore, as shown in fig. 5, the embodiment of the present invention is improved by replacing the resistance of the indoor environment temperature NTC1 with the first fixed value resistor 230 and replacing the resistance of the pipe temperature NTC2 with the second fixed value resistor 520, so that the resistance of the air conditioner temperature sensor in the control system is constant, i.e. the resistance of the air conditioner temperature sensor does not change with the temperature, so that the voltage of the CPU terminal does not change with the temperature, and the compressor 700 normally operates when the indoor temperature is lower than 0 ℃, thereby providing conditions for transforming the common air conditioner into an air conditioner with a freezing function. The specific cooling temperature is accurately controlled by the intelligent temperature control switch 900.
Referring to fig. 2 to 5, an air conditioner with temperature adjusted in a wide range according to an embodiment of the present invention includes a compressor 700, an evaporator 300, and a condenser sequentially connected to form a circulation loop through a pipeline, an expansion valve is disposed between the evaporator 300 and the condenser, and the compressor 700 is controlled by any one of the above control systems. Compared with the prior art, the embodiment of the present invention electrically connects the first temperature sensor 200 to the first fixed value resistor 230, the resistance value of the first fixed value resistor 230 is constant, and compared with the existing resistance value of the indoor environment temperature NTC1, the resistance value of the indoor environment temperature NTC1 decreases with the temperature increase, and increases with the temperature decrease, the resistance value of the first fixed value resistor 230 corresponding to the first temperature sensor 200 does not change with the temperature increase or temperature decrease, so that the electrical signal transmitted from the first temperature sensor 200 to the motherboard 100 is always a high level signal, and the motherboard 100 does not control the power voltage input circuit 800 to be disconnected after the indoor temperature decreases to below 15 ℃; ensure that mainboard 100 can be less than 0 ℃ when indoor temperature and just can control supply voltage input circuit 800 intercommunication for compressor 700 normally works when indoor temperature is less than 0 ℃, and then makes the utility model discloses the air conditioner can refrigerate indoor temperature to below 0 ℃, and the scope of adjusting temperature is wide, for current ordinary domestic air conditioner, the utility model discloses the air conditioner can realize ordinary refrigerated function, also can realize refrigerating in small-size confined space and use as the refrigerator to 20 ℃ below zero, reduces the expense of purchasing the refrigerator alone.
In some embodiments of the present invention, the evaporator 300 is a finned evaporator and the condenser is a finned condenser. The finned condenser and the finned evaporator have good heat exchange effect, the energy efficiency is improved, and the tube temperature sensor 400 and the third temperature sensor 500 are convenient to detect the temperature of the wall of the copper tube and the temperature of the aluminum fin respectively.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and those skilled in the art can make various modifications and variations; any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A control system for a compressor, comprising:
a power supply (600) for generating a power supply input voltage;
a compressor (700) having a power supply voltage input circuit (800) provided between the compressor and the power supply (600);
the main board (100) is electrically connected with the power supply voltage input circuit (800), and when the main board (100) works, the main board (100) is used for controlling the on-off of the power supply voltage input circuit (800);
the temperature control device comprises a first temperature sensor (200) used for detecting indoor temperature, wherein the first temperature sensor (200) is electrically connected with the main board (100) and transmits an electric signal to the main board (100), and the first temperature sensor (200) is electrically connected with a first constant value resistor (230).
2. The control system of a compressor, according to claim 1, characterized in that one end of the first temperature sensor (200) is provided with a first temperature sensing head (210), the first constant value resistor (230) is arranged in the first temperature sensing head (210), and one end of the first temperature sensor (200) far away from the first temperature sensing head (210) is provided with a first male plug (220); the main board (100) is provided with a first female plug (110) matched with the first male plug (220).
3. The control system of a compressor according to claim 1, wherein the first constant resistor (230) has a resistance equal to that of the indoor loop temperature NTC at 25 ℃.
4. The control system of a compressor, according to claim 1, characterized in that the power supply voltage input circuit (800) is provided with a first relay (810), the first relay (810) is electrically connected between the main board (100) and the compressor (700), and when the first relay (810) is controlled to be closed by the main board (100) so that the compressor (700) is connected to the power supply (600) through the power supply voltage input circuit (800).
5. The control system of a compressor, according to claim 1, characterized in that 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 a set refrigeration temperature, the intelligent temperature control switch (900) controls the compressor (700) to stop working.
6. The control system of a compressor, according to claim 1, further comprising a tube temperature sensor (400) for detecting a temperature of a tube wall of the evaporator (300) and/or the condenser, wherein a second fixed resistor (520) is disposed in the tube temperature sensor (400), and the tube temperature sensor (400) is electrically connected to the main board (100) and transmits an electrical signal to the main board (100).
7. The control system of a compressor, according to claim 6, characterized in that it further comprises a third temperature sensor (500) for detecting the temperature of the aluminum fins of the evaporator (300) and/or the condenser, said third temperature sensor (500) being electrically connected to a third fixed resistor, said third temperature sensor (500) being electrically connected to said main board (100) and transmitting an electrical signal to said main board (100).
8. The control system of a compressor, according to claim 7, characterized in that one end of the tube temperature sensor (400) is provided with a tube temperature sensing head (410), the second fixed 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 second female plug (120) matched with the second male plug (420); one end of the third temperature sensor (500) is provided with a third temperature sensing head, the third constant value resistor is arranged in the third temperature sensing head, and the other end of the third temperature sensor (500) is electrically connected with the second male plug (420).
9. The control system of a compressor according to claim 7, wherein the second fixed resistor (520) has a resistance equal to a tube temperature NTC at 25 ℃; the resistance value of the third fixed value resistor is equal to the resistance value of the tube temperature NTC at 25 ℃.
10. An air conditioner with wide temperature regulation range, which is characterized by comprising a compressor (700), an evaporator (300) and a condenser which are sequentially communicated through pipelines to form a circulation loop, wherein an expansion valve is arranged between the evaporator (300) and the condenser, and the compressor (700) is controlled by a control system as claimed in any one of claims 1 to 9.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111156740A (en) * | 2020-02-18 | 2020-05-15 | 五邑大学 | Control system of compressor and air conditioner capable of adjusting temperature in large range |
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