CN116085983A - Low-temperature heating control device and method based on air conditioner - Google Patents

Low-temperature heating control device and method based on air conditioner Download PDF

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Publication number
CN116085983A
CN116085983A CN202310071061.6A CN202310071061A CN116085983A CN 116085983 A CN116085983 A CN 116085983A CN 202310071061 A CN202310071061 A CN 202310071061A CN 116085983 A CN116085983 A CN 116085983A
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China
Prior art keywords
interface
electromagnetic valve
air conditioner
temperature
circuit unit
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CN202310071061.6A
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Chinese (zh)
Inventor
高晗
杨坤
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Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
Original Assignee
Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
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Application filed by Qingdao Haier Air Conditioner Gen Corp Ltd, Qingdao Haier Air Conditioning Electric Co Ltd, Haier Smart Home Co Ltd filed Critical Qingdao Haier Air Conditioner Gen Corp Ltd
Priority to CN202310071061.6A priority Critical patent/CN116085983A/en
Publication of CN116085983A publication Critical patent/CN116085983A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides a low-temperature heating control device and method based on an air conditioner, wherein the device comprises the following components: the temperature detecting circuit unit is used for switching the four-way valve to enable the air conditioner to heat and not defrost, the first interface and the third interface are conducted, after a preset time period, the current interface is disconnected based on the type of the electromagnetic valve, the second interface is conducted, the current interface is the first interface or the third interface, and the temperature detecting circuit unit is used for controlling the electromagnetic valve to work under the condition that the external environment temperature is not greater than the preset temperature. The implementation does not need to add an interface to control the electromagnetic valve.

Description

Low-temperature heating control device and method based on air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a low-temperature heating control device and method based on an air conditioner.
Background
In order to protect the compressor under the working condition of low-temperature heating, the heating compression ratio of the low-temperature heating working condition can be optimized by adopting the air supplementing enthalpy increasing technology, so that the compressor is protected, and the stability of the air conditioner under the low-temperature working condition is improved.
The enthalpy-increasing pipe is beneficial to low-temperature heating working conditions, is mainly applied to low-temperature heating working conditions below a preset temperature, and can reduce the flow of enthalpy-increasing refrigerants by adopting a method of prolonging the enthalpy-increasing capillary pipe and reducing the diameter of the capillary pipe so as to reduce the influence on the refrigerating working conditions.
In order to realize the protection of the compressor, the control needs to be performed through an additional electronic expansion valve and an electromagnetic valve, but the addition of the additional electronic expansion valve and the electromagnetic valve needs to correspondingly increase interfaces on a circuit board, so that the cost is increased.
Disclosure of Invention
The invention provides a low-temperature heating control device and method based on an air conditioner, which are used for solving the defect of overhigh cost caused by adding an additional interface in the prior art and realizing control of an electromagnetic valve under the condition that the additional interface is not needed.
The invention provides a low-temperature heating control device based on an air conditioner, which comprises: the temperature-detecting device comprises a delay circuit unit, a temperature-detecting circuit unit, a four-way valve, an electromagnetic valve and a power amplifier, wherein the delay circuit unit comprises a first interface, a second interface and a third interface;
The power amplifier is connected with the four-way valve in parallel; one end of the four-way valve is electrically connected with the first interface, and the other end of the four-way valve is electrically connected with the third interface;
one end of the temperature detecting circuit unit is electrically connected with the second interface, the other end of the temperature detecting circuit unit is electrically connected with one end of the electromagnetic valve, and the other end of the electromagnetic valve is electrically connected with the other end of the four-way valve;
the power amplifier is used for amplifying the input power of the power amplifier;
the time delay circuit unit is used for conducting the first interface and the third interface under the condition that the four-way valve is switched to enable the air conditioner to heat and not defrost;
after a preset time period, the current interface is disconnected based on the type of the electromagnetic valve, and the second interface is conducted, wherein the current interface is the first interface or the third interface;
the temperature detection circuit unit is used for controlling the electromagnetic valve to work under the condition that the external environment temperature is not more than the preset temperature.
According to the low-temperature heating control device based on the air conditioner, the electromagnetic valve is a self-holding electromagnetic valve or a normally-closed electromagnetic valve;
When the electromagnetic valve is the self-holding electromagnetic valve, the delay circuit unit is specifically configured to switch on the first interface and the third interface and store an electrical signal when the four-way valve is switched to enable the air conditioner to perform heating and not defrosting;
after the preset time period, the first interface is disconnected, the second interface is conducted, and the electric signal is released;
and under the condition that the electromagnetic valve is the normally closed electromagnetic valve, the delay circuit unit is specifically used for switching on the first interface and the third interface under the condition that the four-way valve is switched to enable the air conditioner to heat and not defrost, and switching off the third interface after the preset time length, and switching on the second interface.
According to the low-temperature heating control device based on the air conditioner provided by the invention, the delay circuit unit comprises: a controller, a switch and a capacitor;
one end of the switch is electrically connected with the current interface or the second interface, the other end of the switch is electrically connected with one end of the controller, the other end of the controller is electrically connected with one end of the capacitor, and the other end of the capacitor is electrically connected with the remaining interfaces, wherein the remaining interfaces are the interfaces except the current interface in the first interface and the third interface.
According to the low-temperature heating control device based on the air conditioner, the temperature detection circuit unit comprises a thermistor;
the thermistor is arranged at a position which represents the external environment temperature inside an external machine of the air conditioner;
when the external environment temperature is higher than the preset temperature, the resistance value of the thermistor does not meet the preset resistance value condition, and the electric signal power obtained by the electromagnetic valve is lower than the starting power of the electromagnetic valve;
and under the condition that the external environment temperature is not greater than the preset temperature, the tissues of the thermistor meet the preset resistance condition, and the electric signal power obtained by the electromagnetic valve is not less than the starting power of the electromagnetic valve.
According to the low-temperature heating control device based on the air conditioner, the external environment temperature is obtained based on the difference between the external actual environment temperature and the detection temperature.
According to the low-temperature heating control device based on the air conditioner, the minimum value of the preset numerical value is determined by adopting the following formula:
K min ≥a(P 4wv +P sv )/P in
wherein K is min At the minimum value of the preset value, P 4wv For the rated power of the four-way valve, P sv For the rated power of the electromagnetic valve, P in For the input power of the power amplifier, a is a first parameter determined based on the supply voltage fluctuation range.
According to the low-temperature heating control device based on the air conditioner, the maximum value of the preset numerical value is determined by adopting the following formula:
K max ≤λP (4wv,max)
wherein K is max At the maximum value of the preset value, P (4wv,max) And lambda is a tolerance range, lambda is greater than 0.2, and lambda is not greater than 1 for the maximum power of the four-way valve.
The invention also provides a low-temperature heating control method based on the air conditioner, which is applied to the low-temperature heating control device based on the air conditioner, and the device comprises: the temperature-detecting device comprises a delay circuit unit, a temperature-detecting circuit unit, a four-way valve, an electromagnetic valve and a power amplifier, wherein the delay circuit unit comprises a first interface, a second interface and a third interface;
the power amplifier is connected with the four-way valve in parallel; one end of the four-way valve is electrically connected with the first interface, and the other end of the four-way valve is electrically connected with the third interface;
one end of the temperature detecting circuit unit is electrically connected with the second interface, the other end of the temperature detecting circuit unit is electrically connected with one end of the electromagnetic valve, and the other end of the electromagnetic valve is electrically connected with the other end of the four-way valve;
The method comprises the following steps:
amplifying an input power of the power amplifier by the power amplifier;
under the condition that the four-way valve is switched to enable the air conditioner to heat and not defrost, the first interface and the third interface are conducted;
after a preset time period, the current interface is disconnected based on the type of the electromagnetic valve, and the second interface is conducted, wherein the current interface is the first interface or the third interface;
and controlling the electromagnetic valve to work under the condition that the external environment temperature is not more than the preset temperature through the temperature detection circuit unit.
According to the low-temperature heating control method based on the air conditioner, the electromagnetic valve is a self-holding electromagnetic valve or a normally-closed electromagnetic valve;
when the electromagnetic valve is the self-holding electromagnetic valve, the four-way valve is switched to enable the air conditioner to heat and not defrost through the delay circuit unit, the first interface and the third interface are conducted, and an electric signal is stored;
after the preset time period, the first interface is disconnected, the second interface is conducted, and the electric signal is released;
under the condition that the electromagnetic valve is the normally closed electromagnetic valve, the first interface and the third interface are conducted under the condition that the four-way valve is switched to enable the air conditioner to heat and not defrost through the time delay circuit unit, and after the preset time length, the third interface is disconnected, and the second interface is conducted.
The invention provides a low-temperature heating control device and a method based on an air conditioner, wherein the device comprises the following components: the temperature testing device comprises a time delay circuit unit, a temperature testing circuit unit, a four-way valve, an electromagnetic valve and a power amplifier, wherein the time delay circuit unit comprises a first interface, a second interface and a third interface, the power amplifier is connected with the four-way valve in parallel, one end of the four-way valve is electrically connected with the first interface, the other end of the four-way valve is electrically connected with the third interface, one end of the temperature testing circuit unit is electrically connected with the second interface, the other end of the temperature testing circuit unit is electrically connected with one end of the electromagnetic valve, the other end of the electromagnetic valve is electrically connected with the other end of the four-way valve, the power amplifier is used for amplifying the input power of the power amplifier, the time delay circuit unit is used for switching the four-way valve into a state that the air conditioner heats and does not defrost, the first interface and the third interface are conducted, after the preset time length, the current interface is disconnected based on the type of the electromagnetic valve, the current interface is the first interface or the third interface, and the temperature testing circuit unit is used for controlling the electromagnetic valve to work under the condition that the external environment temperature is not larger than the preset temperature.
By the mode, the control of the electromagnetic valve can be realized without additionally adding an interface, and the cost can be reduced.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a low-temperature heating control device based on an air conditioner according to the present invention;
FIG. 2 is a schematic diagram of a circuit corresponding to a four-way valve in the prior art;
FIG. 3 is a schematic diagram of a low temperature heating control device based on an air conditioner according to a second embodiment of the present invention;
FIG. 4 is a third schematic diagram of the low-temperature heating control device based on the air conditioner according to the present invention;
FIG. 5 is a schematic flow chart of a low-temperature heating control method based on an air conditioner according to the present invention;
FIG. 6 is a second flow chart of a low temperature heating control method based on an air conditioner according to the present invention;
fig. 7 is a schematic structural diagram of an electronic device provided by the present invention.
Reference numerals:
110: a delay circuit unit; 120: a temperature detecting circuit unit; 130: a four-way valve; 140: an electromagnetic valve; 150: a power amplifier; 101: a first interface; 102: a second interface; 103: a third interface; 210: a power supply end; 220: at present, a four-way valve; 310: a switch; 320: a controller; 330: and a capacitor.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order to realize control of the electromagnetic valve without adding any additional interface, the embodiment of the invention provides a low-temperature heating control device and method based on an air conditioner, and the low-temperature heating control device based on the air conditioner is described below with reference to fig. 1:
as shown in fig. 1, a low-temperature heating control device based on an air conditioner, the device comprising: the time delay circuit unit 110, the temperature detection circuit unit 120, the four-way valve 130, the electromagnetic valve 140 and the power amplifier 150, wherein the time delay circuit unit 110 comprises a first interface 101, a second interface 102 and a third interface 103.
The power amplifier 150 is connected in parallel with the four-way valve 130, one end of the four-way valve 130 is electrically connected with the first interface 101, and the other end of the four-way valve 130 is electrically connected with the third interface 103. One end of the temperature-detecting circuit unit 120 is electrically connected with the second interface 102, the other end of the temperature-detecting circuit unit 120 is electrically connected with one end of the solenoid valve 140, and the other end of the solenoid valve 140 is electrically connected with the other end of the four-way valve 130.
The power amplifier 150 amplifies the input power of the power amplifier 105. In one embodiment, the input power may be amplified by amplifying the current while ensuring that the voltage is unchanged. In another embodiment, the input power may be amplified by amplifying the voltage and the current at the same time, and may be specifically set according to actual use conditions.
The delay circuit unit 110 is configured to switch between the first interface 101 and the third interface 103 when the four-way valve 130 is switched to enable the air conditioner to perform heating and not defrosting. After a preset period of time, the current interface is disconnected based on the type of the solenoid valve 140, and the second interface 102 is turned on, wherein the current interface is the first interface 101 or the third interface 103.
The preset time period is a time period preset based on the characteristics of the delay circuit unit 101. The delay circuit unit 101 has two cases, in which the first interface 101 and the third interface 103 are turned on when the four-way valve 130 is switched to heat the air conditioner and not defrost the air conditioner. After a preset period of time, the first interface 101 is turned off and the second interface 102 is turned on.
In the second case, when the four-way valve 130 is switched to heat the air conditioner and not defrost the air conditioner, the first port 101 and the third port 103 are turned on. After a preset period of time, the third interface 103 is turned off and the second interface 102 is turned on.
The temperature detecting circuit unit 120 is used for controlling the electromagnetic valve 140 to work under the condition that the external environment temperature is not more than the preset temperature. That is, the solenoid valve 140 is operated when the four-way valve 130 is switched to a preset time period for heating and defrosting the air conditioner, and the external environment temperature is not higher than the preset temperature.
In such a way, the low-temperature heating control device based on the air conditioner provided by the embodiment of the invention can control the electromagnetic valve without additionally adding an interface, and can reduce the cost.
In order to facilitate understanding of the low-temperature heating control device based on the air conditioner provided by the embodiment of the invention, a circuit corresponding to the four-way valve is described below.
As shown in fig. 2, the present four-way valve includes a power supply end 210 and a present four-way valve 220. As shown in fig. 1, in the low-temperature heating control device based on an air conditioner according to the embodiment of the present invention, a power supply end (not numbered in fig. 1), a delay circuit unit 110, a temperature detection circuit unit 120, a four-way valve 130, an electromagnetic valve 140 and a power amplifier 150, wherein the delay circuit unit 110 includes a first interface 101, a second interface 102 and a third interface 103.
In one implementation manner, the low-temperature heating control device based on the air conditioner provided by the embodiment of the invention can be provided with the split coils, and the control of the electromagnetic valve can be realized by only adding simple components on the basis of not adding an additional interface to a computer version of a circuit corresponding to the conventional four-way valve.
At present, under the condition of controlling the flow by using the enthalpy-increasing pipe capillary tube, the normally open capillary tube with a fixed caliber cannot meet the requirements of all working conditions due to different requirements on the flow of the enthalpy-increasing pipe and the superheat degree before and after the enthalpy increase under different working conditions, and negative influence can be caused on some working conditions. For example, optimizing heating results in a cooling condition that is more prone to icing the tubule. The low-temperature heating control device based on the air conditioner provided by the embodiment of the invention can avoid the problem of flow control by using the enthalpy-increasing pipe capillary tube, and can improve the use experience of users.
As an implementation manner of the embodiment of the present invention, the electromagnetic valve is a self-holding electromagnetic valve or a normally closed electromagnetic valve.
The self-holding electromagnetic valve is an electromagnetic valve adopting a self-locking memory mechanical structure and comprises a first coil and a second coil. The working principle of the first coil is as follows: the first coil is in an operating state (on) when energized, and further, is kept in an operating state (on) when energized to de-energized. The working principle of the second coil is as follows: the second coil is in a non-operating state (off) when energized, and further, is kept in a non-operating state (off) when energized to deenergized.
The normal-closed electromagnetic valve is an electromagnetic valve whose default state is a non-operating state (closed), and the operating principle of the normal-closed electromagnetic valve is that the normal-closed electromagnetic valve is in an operating state (open) when energized, and in a non-operating state (closed) when energized to de-energized.
When the electromagnetic valve is the self-holding electromagnetic valve, the delay circuit unit is specifically configured to store an electrical signal when the first interface and the third interface are turned on and when the first interface and the third interface are turned on when the four-way valve is switched to enable the air conditioner to perform heating and not defrost. After the preset time period, the first interface is disconnected, the second interface is conducted, and the electric signal is released. The preset time length is the time corresponding to the stored electric signals.
In the low-temperature heating control device based on the air conditioner provided by the embodiment of the invention, when the delay circuit unit stores the electric signals, that is, when the first interface and the third interface are conducted, the delay circuit unit, the four-way valve and the power amplifier are in a working state, and the temperature detecting circuit unit and the electromagnetic valve are in a non-working state, in this case, the power consumption of the delay circuit unit is close to the power consumption of the subsequent electromagnetic valve in the working state.
In the low-temperature heating control device based on the air conditioner provided by the embodiment of the invention, when the delay circuit unit releases the electric signal, that is, when the second interface and the third interface are conducted, the delay circuit unit, the temperature detecting circuit unit, the four-way valve, the electromagnetic valve and the power amplifier are all in a working state, wherein the delay circuit unit is used as a temporary power supply, and the power can be supplied to the temperature detecting circuit unit and the electromagnetic valve through the second interface and the third interface, that is, the delay circuit unit, the temperature detecting circuit unit and the electromagnetic valve are equivalent to an independent electric path.
And under the condition that the electromagnetic valve is the normally closed electromagnetic valve, the delay circuit unit is specifically used for switching on the first interface and the third interface under the condition that the four-way valve is switched to heat and not defrost the air conditioner, and switching off the third interface after the preset time length, and switching on the second interface.
That is, when the solenoid valve is a normally closed solenoid valve, the first port and the third port are turned on when the four-way valve is switched to heat the air conditioner and not defrost the air conditioner. After a preset time period, the first interface and the second interface are conducted. In this case, the delay circuit unit consumes no power and does not supply power to the temperature detection circuit unit and the solenoid valve.
It can be seen that, in this embodiment, in the case that the solenoid valve is a self-holding solenoid valve, the delay circuit unit is used to complete the interface switching, and to supply power to both the temperature detection circuit unit and the solenoid valve. When the electromagnetic valve is a normally closed electromagnetic valve, the delay circuit unit is only used for completing interface switching, so that the control of the electromagnetic valve is realized.
As an implementation manner of the embodiment of the present invention, the delay circuit unit includes: a controller, a switch and a capacitor. The controller is used for controlling the switch, and particularly is used for outputting a corresponding switching signal when the potential difference of the two ends of the controller reaches a preset potential difference, and the switch can change the connection state based on the switching signal.
One end of the switch is electrically connected with the current interface or the second interface, the other end of the switch is electrically connected with one end of the controller, the other end of the controller is electrically connected with one end of the capacitor, and the other end of the capacitor is electrically connected with the remaining interfaces, wherein the remaining interfaces are the interfaces except the current interface in the first interface and the third interface.
And under the condition that the four-way valve is switched to enable the air conditioner to heat and not defrost, one end of the switch is electrically connected with the current interface, and after the preset time length, one end of the switch is electrically connected with the second interface.
In the case where the solenoid valve is a self-holding solenoid valve, the current port is the first port, and as shown in fig. 3, when the four-way valve 130 is switched to heat the air conditioner and not defrost the air conditioner, the first port (not numbered in fig. 3) and the third port (not numbered in fig. 3) are turned on. Specifically, one end of the switch 310 is electrically connected to one end of the four-way valve 130 (the first interface is turned on), the other end of the switch 310 is electrically connected to one end of the controller 320, the other end of the controller 320 is electrically connected to one end of the capacitor 330, the other end of the capacitor 330 is electrically connected to the other end of the four-way valve 130 (the third interface is turned on), and the other end of the capacitor 330 is also electrically connected to one end of the solenoid valve 140, in which case the capacitor 330 stores an electrical signal.
After a preset period of time, that is, when the capacitor 330 is stable, the potential difference between the two ends of the controller 320 reaches the preset potential difference, the controller 320 may send a corresponding switching signal to the switch 310, as shown in fig. 4, where the switch 310 is electrically connected to one end of the temperature-detecting circuit unit 120 (corresponding to the first interface being disconnected and the second interface being conducted) without electrically connecting one end of the switch 310 to one end of the four-way valve 130 based on the switching signal, and the other end of the temperature-detecting circuit unit 120 is electrically connected to the other end of the solenoid valve 140, where the capacitor 330 releases the electrical signal.
When the solenoid valve is a normally closed solenoid valve, the current interface is a third interface, and when the four-way valve is switched to enable the air conditioner to heat and not defrost, the first interface and the third interface are conducted. Specifically, one end of the switch is electrically connected with one end of the four-way valve (the third interface is conducted), the other end of the switch is electrically connected with one end of the controller, the other end of the controller is electrically connected with one end of the capacitor, the other end of the capacitor is electrically connected with the other end of the four-way valve (the first interface is conducted), and the other end of the capacitor is also electrically connected with one end of the electromagnetic valve.
After a preset time period, that is, under the condition that the capacitance is stable, the potential difference at two ends of the controller reaches the preset potential difference, the controller can send a corresponding switching signal to the switch, the switch is used for electrically connecting one end of the switch with one end of the four-way valve 130 based on the switching signal, and is electrically connected with one end of the temperature detection circuit unit (corresponding to the disconnection of the third interface and the conduction of the second interface), and the other end of the temperature detection circuit unit is electrically connected with the other end of the electromagnetic valve.
It can be seen that in this embodiment, the delay circuit unit may include a controller, a switch and a capacitor, so that the control of the electromagnetic valve may be implemented through the controller, the switch and the capacitor.
As an implementation of the embodiment of the present invention, the temperature detecting circuit unit may include a thermistor. Wherein the thermistor is temperature sensitive and can exhibit different resistance values at different temperatures.
At present, a coil circuit is generally arranged in an external machine of an air conditioner, that is, the low-temperature heating control device (including a thermistor) based on the air conditioner provided by the embodiment of the invention can be arranged in the external machine of the air conditioner, and the temperature of the external machine of the air conditioner is almost consistent with the actual ambient temperature of the outside under the condition that the external machine of the air conditioner stands for a sufficient period of time.
And under the condition that the air conditioner is started, the temperature inside the outer machine of the air conditioner can be higher than the actual environment temperature of the outside, the temperature which can be detected by the thermistor is larger than the actual environment temperature of the outside, and in order to detect more accurate temperature, the thermistor can be arranged at the position inside the outer machine of the air conditioner, which can represent the outside environment temperature.
And under the condition that the external environment temperature is higher than the preset temperature, the resistance value of the thermistor does not meet the preset resistance value condition, and the electric signal power obtained by the electromagnetic valve is lower than the starting power of the electromagnetic valve.
The preset resistance condition can be set according to actual use conditions. In one embodiment, the preset resistance condition may be a preset resistance, and when the resistance of the thermistor is greater than the preset resistance, it indicates that the resistance of the thermistor does not meet the preset resistance condition, and the power of the electric signal obtained by the electromagnetic valve is less than the starting power of the electromagnetic valve.
And under the condition that the external environment temperature is not greater than the preset temperature, the tissues of the thermistor meet the preset resistance condition, and the electric signal power obtained by the electromagnetic valve is not less than the starting power of the electromagnetic valve.
In one embodiment, when the resistance of the thermistor is not greater than the preset resistance, it is indicated that the resistance of the thermistor meets the preset resistance condition, and the electric signal power obtained by the electromagnetic valve is not less than the starting power of the electromagnetic valve.
As an implementation manner of the embodiment of the present invention, in order to be able to detect a more accurate temperature, the above-mentioned external environment temperature is a temperature obtained based on a difference between an external actual environment temperature and a detected temperature.
For example, the outside actual environment temperature is-10 ℃, the detected temperature difference is 5 ℃ obtained by the temperature sensor, and then the preset temperature can be set to be-5 ℃. That is, the enthalpy increasing function can be started under the condition that the external environment temperature is not more than-5 ℃. The setting may be specifically performed according to actual use conditions, and is not particularly limited herein.
As an implementation manner of the embodiment of the present invention, the output power of the power amplifier is a preset number multiple of the input power of the power amplifier.
In one embodiment, the preset value has a value interval, wherein the minimum value of the preset value can be determined based on the input power, the rated power of the four-way valve and the rated power of the solenoid valve.
The minimum value of the preset numerical value is determined by adopting a formula (1):
K min ≥a(P 4wv +P sv )/P in (1)
wherein K is min For the preset value, P 4wv For the fourRated power of through valve, P sv For the rated power of the electromagnetic valve, P in For the input power of the power amplifier, a is a first parameter determined based on the supply voltage fluctuation range.
The maximum value of the preset value is determined based on the maximum power of the four-way valve, and can be determined by adopting a formula (2):
K max ≤λP (4wv,max) (2)
wherein K is max At the maximum value of the preset value, P (4wv,max) And for the maximum power of the four-way valve, lambda is a tolerance range, lambda is larger than 0.2 and not larger than 1, and lambda can be determined according to actual requirements.
In order to ensure that the power amplification meets the requirement, the output power of the power amplifier can be determined according to the rated power of the four-way valve and the rated power of the electromagnetic valve, and the output power of the specific power amplifier meets the formula (3).
bP out ≥P 4wv +P sv
Wherein b is a second parameter (specifically, the second parameter can be adjusted according to practical situations) determined based on the fluctuation range of the power supply voltage, the fluctuation range of the power supply voltage is +10% -15% when the power supply voltage is alternating current, and the fluctuation range of the power supply voltage is +10% > when the power supply voltage is direct current. If the power supply voltage fluctuation range is not within the above range, voltage stabilizing measures may be taken.
In a specific embodiment, the power supply voltage specification may be AC220-240V,50/60Hz, with power supply voltage fluctuations operating steadily in the range of 85% -110%. The temperature should not exceed 125 ℃. The rated power is generally between 10 and 20W. For standardization, the four-way valve and the solenoid valve may use the same coil.
Under the condition of calculating the temperature corresponding to the coil, the coil can be regarded as a pure resistance circuit, and the voltage, the current and the duration at two ends of the coil are preset, and after the material corresponding to the coil is obtained, the maximum power under the condition of meeting the condition can be calculated. The present invention is not particularly limited herein.
The first parameter a in the above formula (1) and the second parameter b in the above formula (3) have a correspondence, for example, in the case that the second parameter is determined to be 0.85, that is, in the case of 85% voltage fluctuation, the starting condition is 1/0.85=1.176, and is approximately 1.2, that is, the first parameter a in the above formula (1) may be 1.2.
It can be seen that in this embodiment. By parameter design of the power amplifier, the low-temperature heating control device based on the air conditioner can normally operate so as to control the electromagnetic valve.
The low temperature heating control method based on the air conditioner provided by the invention is described below, and the low temperature heating control method based on the air conditioner and the low temperature heating control device based on the air conditioner described above can be correspondingly referred to each other.
As shown in fig. 5, an embodiment of the present invention provides a low-temperature heating control method based on an air conditioner, where the method is applied to any one of the low-temperature heating control devices based on an air conditioner, and the device includes: the temperature-detecting circuit comprises a time delay circuit unit, a temperature-detecting circuit unit, a four-way valve, an electromagnetic valve and a power amplifier, wherein the time delay circuit unit comprises a first interface, a second interface and a third interface.
The power amplifier is connected with the four-way valve in parallel; one end of the four-way valve is electrically connected with the first interface, and the other end of the four-way valve is electrically connected with the third interface.
One end of the temperature detecting circuit unit is electrically connected with the second interface, the other end of the temperature detecting circuit unit is electrically connected with one end of the electromagnetic valve, and the other end of the electromagnetic valve is electrically connected with the other end of the four-way valve.
The method comprises the following steps:
s501, amplifying the input power of the power amplifier through the power amplifier.
S502, when the four-way valve is switched to enable the air conditioner to heat and not defrost, the first interface and the third interface are conducted.
S503, after a preset time period, the current interface is disconnected and the second interface is connected based on the type of the electromagnetic valve.
Wherein the current interface is the first interface or the third interface.
S504, controlling the electromagnetic valve to work under the condition that the external environment temperature is not more than the preset temperature through the temperature detection circuit unit.
As an implementation mode of the embodiment of the invention, the electromagnetic valve is a self-holding electromagnetic valve or a normally closed electromagnetic valve;
when the electromagnetic valve is the self-holding electromagnetic valve, the delay circuit is used for switching the four-way valve to enable the air conditioner to be heated and not defrost, the first interface and the third interface are conducted, and an electric signal is stored;
after the preset time period, the first interface is disconnected, the second interface is conducted, and the electric signal is released;
under the condition that the electromagnetic valve is the normally closed electromagnetic valve, the first interface and the third interface are conducted under the condition that the four-way valve is switched to enable the air conditioner to heat and not defrost through the delay circuit, and after the preset time length, the third interface is disconnected, and the second interface is conducted.
As an implementation manner of the embodiment of the present invention, the delay circuit unit includes: a controller, a switch and a capacitor.
Under the condition that the electromagnetic valve is a self-holding electromagnetic valve, the current interface is a first interface, and the capacitor stores an electric signal under the condition that the first interface and the third interface are conducted;
after the preset time length, the potential difference at the two ends of the controller reaches the preset potential difference, the controller sends a switching signal to the switch, the switch is switched to a connection state for conducting the second interface based on the switching signal, and the capacitor releases the electric signal.
When the electromagnetic valve is a normally closed electromagnetic valve, the current interface is a third interface, after the preset time length, the potential difference of the two ends of the controller reaches the preset potential difference, the controller sends a switching signal to the switch, and the switch is switched to a connection state for conducting the second interface based on the switching signal.
As one implementation of the embodiment of the present invention, the temperature detecting circuit unit includes a thermistor;
the thermistor is arranged at a position which can represent the external environment temperature inside an external machine of the air conditioner;
when the external environment temperature is higher than the preset temperature, the resistance value of the thermistor does not meet the preset resistance value condition, and the electric signal power obtained by the electromagnetic valve is lower than the starting power of the electromagnetic valve;
And under the condition that the external environment temperature is not greater than the preset temperature, the tissues of the thermistor meet the preset resistance condition, and the electric signal power obtained by the electromagnetic valve is not less than the starting power of the electromagnetic valve.
As an implementation manner of the embodiment of the present invention, the external environment temperature is a temperature obtained based on a difference between an external actual environment temperature and a detected temperature.
As an implementation manner of the embodiment of the present invention, the output power of the power amplifier is a preset number multiple of the input power of the power amplifier.
As an implementation manner of the embodiment of the present invention, the minimum value of the preset numerical value is determined by adopting the following formula:
K min ≥a(P 4wv +P sv )/P in
wherein K is min At the minimum value of the preset value, P 4wv For the rated power of the four-way valve, P sv For the rated power of the electromagnetic valve, P in For the input power of the power amplifier, a is a first parameter determined based on the supply voltage fluctuation range.
As an implementation manner of the embodiment of the present invention, the maximum value of the preset numerical value is determined by the following formula:
K m ≤λP (4wv,max)
wherein K is max At the maximum value of the preset value, P (4wv,max) For the maximum power of the four-way valve, lambda is a tolerance range, lambda is greater than 0.2, and lambda is not greater than 1.
For the air conditioner equipped with the low-temperature heating control device based on the air conditioner provided by the embodiment of the invention, the steps shown in fig. 6 may be executed:
as shown in fig. 6, an air conditioner installed with the low temperature heating control device based on the air conditioner provided by the embodiment of the present invention may perform the following steps:
s601, starting the air conditioner.
S602, it is determined whether the current operation mode is the heating mode, if the current operation mode is the heating mode, step S603 is executed, and if the current operation mode is not the heating mode, step S608 is executed.
S603, it is determined whether or not the defrosting mode is performed, and if the defrosting mode is performed, step S604 is performed, and if the defrosting mode is not performed, step S605 is performed.
S604, the state of the four-way valve is not switched (closed) and step S608 is executed.
S605, the state of the four-way valve is switched (opened).
That is, the four-way valve is switched to a state corresponding to the heating and non-defrosting of the air conditioner.
S606, judging whether the external environment temperature is greater than a preset temperature, and executing step S608 when the external environment temperature is greater than the preset temperature. In case that the external environment temperature is not greater than the preset temperature, step S607 is performed.
In particular, it can be judged by a thermistor.
S607, after a preset period of time, the solenoid valve is in an operating state (opened).
S608, control ends.
Fig. 7 illustrates a physical schematic diagram of an electronic device, as shown in fig. 7, which may include: processor 710, communication interface (Communications Interface) 720, memory 730, and communication bus 740, wherein processor 710, communication interface 720, memory 730 communicate with each other via communication bus 740. The processor 710 may call a logic instruction in the memory 730 to perform a low temperature heating control method based on an air conditioner, the method including amplifying an input power of the power amplifier by the power amplifier, switching on a first interface and a third interface in case that the four-way valve is switched to make the air conditioner perform heating and not defrosting, switching off a current interface based on a type of the solenoid valve after a preset period of time, and switching on a second interface, wherein the current interface is the first interface or the third interface, and controlling the solenoid valve to operate under a condition that an external environment temperature is not greater than a preset temperature by the temperature detecting circuit unit.
Further, the logic instructions in the memory 730 described above may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In another aspect, the present invention further provides a computer program product, where the computer program product includes a computer program, the computer program may be stored on a non-transitory computer readable storage medium, and when the computer program is executed by a processor, the computer is capable of executing the low-temperature heating control method based on an air conditioner provided by the above methods, the method includes amplifying, by a power amplifier, input power of the power amplifier, switching the four-way valve to a condition that the air conditioner heats and does not defrost, turning on a first interface and a third interface, turning off the current interface based on a type of the electromagnetic valve after a preset period, and turning on the second interface, where the current interface is the first interface or the third interface, and controlling the electromagnetic valve to operate under a condition that an external environment temperature is not greater than a preset temperature by a temperature verification circuit unit.
In still another aspect, the present invention further provides a non-transitory computer readable storage medium, on which a computer program is stored, the computer program when executed by a processor is implemented to perform the low temperature heating control method based on an air conditioner provided by the above methods, the method includes amplifying input power of a power amplifier by the power amplifier, switching on a first interface and a third interface in case that a four-way valve is switched to make the air conditioner perform heating and not defrosting, and after a preset period of time, switching off the current interface based on a type of an electromagnetic valve, switching on the second interface, wherein the current interface is the first interface or the third interface, and controlling the electromagnetic valve to operate under a condition that an external environment temperature is not greater than a preset temperature by a temperature detection circuit unit.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A low temperature heating control device based on an air conditioner, the device comprising: the temperature-detecting device comprises a delay circuit unit, a temperature-detecting circuit unit, a four-way valve, an electromagnetic valve and a power amplifier, wherein the delay circuit unit comprises a first interface, a second interface and a third interface;
the power amplifier is connected with the four-way valve in parallel; one end of the four-way valve is electrically connected with the first interface, and the other end of the four-way valve is electrically connected with the third interface;
one end of the temperature detecting circuit unit is electrically connected with the second interface, the other end of the temperature detecting circuit unit is electrically connected with one end of the electromagnetic valve, and the other end of the electromagnetic valve is electrically connected with the other end of the four-way valve;
The power amplifier is used for amplifying the input power of the power amplifier;
the time delay circuit unit is used for conducting the first interface and the third interface under the condition that the four-way valve is switched to enable the air conditioner to heat and not defrost;
after a preset time period, the current interface is disconnected based on the type of the electromagnetic valve, and the second interface is conducted, wherein the current interface is the first interface or the third interface;
the temperature detection circuit unit is used for controlling the electromagnetic valve to work under the condition that the external environment temperature is not more than the preset temperature.
2. The air conditioner-based low-temperature heating control device according to claim 1, wherein the electromagnetic valve is a self-holding electromagnetic valve or a normally closed electromagnetic valve;
when the electromagnetic valve is the self-holding electromagnetic valve, the delay circuit unit is specifically configured to switch on the first interface and the third interface and store an electrical signal when the four-way valve is switched to enable the air conditioner to perform heating and not defrosting;
after the preset time period, the first interface is disconnected, the second interface is conducted, and the electric signal is released;
And under the condition that the electromagnetic valve is the normally closed electromagnetic valve, the delay circuit unit is specifically used for switching on the first interface and the third interface under the condition that the four-way valve is switched to enable the air conditioner to heat and not defrost, and switching off the third interface after the preset time length, and switching on the second interface.
3. The air conditioner-based low temperature heating control device according to claim 1, wherein the delay circuit unit includes: a controller, a switch and a capacitor;
one end of the switch is electrically connected with the current interface or the second interface, the other end of the switch is electrically connected with one end of the controller, the other end of the controller is electrically connected with one end of the capacitor, and the other end of the capacitor is electrically connected with the remaining interfaces, wherein the remaining interfaces are the interfaces except the current interface in the first interface and the third interface.
4. The air conditioner-based low temperature heating control device according to claim 1, wherein the temperature detecting circuit unit includes a thermistor;
the thermistor is arranged at a position which represents the external environment temperature inside an external machine of the air conditioner;
When the external environment temperature is higher than the preset temperature, the resistance value of the thermistor does not meet the preset resistance value condition, and the electric signal power obtained by the electromagnetic valve is lower than the starting power of the electromagnetic valve;
and under the condition that the external environment temperature is not greater than the preset temperature, the tissues of the thermistor meet the preset resistance condition, and the electric signal power obtained by the electromagnetic valve is not less than the starting power of the electromagnetic valve.
5. The air conditioner-based low temperature heating control device according to claim 4, wherein the external environment temperature is a temperature obtained based on a difference between an external actual environment temperature and a detected temperature.
6. The air conditioner-based low temperature heating control device according to any one of claims 1 to 5, wherein the output power of the power amplifier is a preset number multiple of the input power of the power amplifier.
7. The air conditioner-based low temperature heating control device according to claim 6, wherein the minimum value of the preset numerical value is determined using the following formula:
K min ≥a(P 4wv +P sv )/P in
wherein K is min At the minimum value of the preset value, P 4wv For the rated power of the four-way valve, P sv For the rated power of the electromagnetic valve, P in For the input power of the power amplifier, a is a first parameter determined based on the supply voltage fluctuation range.
8. The air conditioner-based low temperature heating control device according to claim 6, wherein the maximum value of the preset numerical value is determined using the following formula:
K max ≤λP (4wv,max)
wherein K is max At the maximum value of the preset value, P (4wv,max) And lambda is a tolerance range, lambda is greater than 0.2, and lambda is not greater than 1 for the maximum power of the four-way valve.
9. An air conditioner-based low temperature heating control method, wherein the method is applied to the air conditioner-based low temperature heating control apparatus according to any one of claims 1 to 8, the apparatus comprising: the temperature-detecting device comprises a delay circuit unit, a temperature-detecting circuit unit, a four-way valve, an electromagnetic valve and a power amplifier, wherein the delay circuit unit comprises a first interface, a second interface and a third interface;
the power amplifier is connected with the four-way valve in parallel; one end of the four-way valve is electrically connected with the first interface, and the other end of the four-way valve is electrically connected with the third interface;
one end of the temperature detecting circuit unit is electrically connected with the second interface, the other end of the temperature detecting circuit unit is electrically connected with one end of the electromagnetic valve, and the other end of the electromagnetic valve is electrically connected with the other end of the four-way valve;
The method comprises the following steps:
amplifying an input power of the power amplifier by the power amplifier;
under the condition that the four-way valve is switched to enable the air conditioner to heat and not defrost, the first interface and the third interface are conducted;
after a preset time period, the current interface is disconnected based on the type of the electromagnetic valve, and the second interface is conducted, wherein the current interface is the first interface or the third interface;
and controlling the electromagnetic valve to work under the condition that the external environment temperature is not more than the preset temperature through the temperature detection circuit unit.
10. The air conditioner-based low temperature heating control method according to claim 9, wherein the electromagnetic valve is a self-holding electromagnetic valve or a normally closed electromagnetic valve;
when the electromagnetic valve is the self-holding electromagnetic valve, the four-way valve is switched to enable the air conditioner to heat and not defrost through the delay circuit unit, the first interface and the third interface are conducted, and an electric signal is stored;
after the preset time period, the first interface is disconnected, the second interface is conducted, and the electric signal is released;
under the condition that the electromagnetic valve is the normally closed electromagnetic valve, the first interface and the third interface are conducted under the condition that the four-way valve is switched to enable the air conditioner to heat and not defrost through the time delay circuit unit, and after the preset time length, the third interface is disconnected, and the second interface is conducted.
CN202310071061.6A 2023-01-16 2023-01-16 Low-temperature heating control device and method based on air conditioner Pending CN116085983A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310071061.6A CN116085983A (en) 2023-01-16 2023-01-16 Low-temperature heating control device and method based on air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310071061.6A CN116085983A (en) 2023-01-16 2023-01-16 Low-temperature heating control device and method based on air conditioner

Publications (1)

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CN116085983A true CN116085983A (en) 2023-05-09

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