Low temperature heating control apparatus and method for an air conditioner

Abstract

The application provides a low-temperature heating control device and method based on an air conditioner, which comprises a delay circuit unit, a temperature detection circuit unit, a four-way valve, an electromagnetic valve and a power amplifier. The power amplifier is connected in parallel with the four-way valve. One end of the four-way valve is electrically connected with a first interface, and the other end of the four-way valve is electrically connected with a third interface. One end of the temperature detection circuit unit is electrically connected with a second interface, and the other end of the temperature detection 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 delay circuit unit is used for conducting the first interface and the third interface when the four-way valve is switched to make the air conditioner heat and not defrost. After a preset time length, the current interface is disconnected, and the second interface is conducted based on the type of the electromagnetic valve. 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 when the external environment temperature is not greater than a preset temperature. The electromagnetic valve does not need to be added with an interface for control.

Description

TECHNICAL FIELD

[0001] The present application relates to the air conditioning technical field, and particularly to a low-temperature heating control device and method based on an air conditioner. BACKGROUND

[0002] In order to protect the compressor in the low-temperature heating condition, the air charge enthalpy increasing technology can be used to optimize the heating compression ratio of the low-temperature heating condition, so as to protect the compressor and improve the stability of the air conditioner in the low-temperature condition.

[0003] The enthalpy increasing pipe is beneficial to the low-temperature heating condition and is mainly applied to the low-temperature heating condition below the preset temperature. In the current mode, the method of extending the enthalpy increasing capillary pipe and reducing the capillary pipe diameter can be used to reduce the enthalpy increasing refrigerant flow, so as to reduce the influence on the refrigeration condition.

[0004] In order to protect the compressor, the additional electronic expansion valve and electromagnetic valve need to be controlled. However, the increase of the additional electronic expansion valve and electromagnetic valve requires the increase of the interface on the circuit board, which leads to the increase of the cost. SUMMARY

[0005] The present application provides a low-temperature heating control device and method based on an air conditioner, which solves the defect of high cost caused by the increase of the additional interface and realizes the control of the electromagnetic valve without adding the additional interface.

[0006] The present application provides a low-temperature heating control device based on an air conditioner, which comprises a delay circuit unit, a temperature checking circuit unit, a four-way valve, an electromagnetic valve and a power amplifier. The delay circuit unit comprises a first interface, a second interface and a third interface.

[0007] The power amplifier is connected in parallel with the four-way valve. 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.

[0008] One end of the temperature checking circuit unit is electrically connected with the second interface, and the other end of the temperature checking 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.

[0009] The power amplifier is used for amplifying the input power of the power amplifier.

[0010] The delay circuit unit is used for conducting the first interface and the third interface when the four-way valve is switched to the heating and non-defrosting of the air conditioner.

[0011] After a preset time length, the current interface is disconnected and the second interface is turned on based on the type of the electromagnetic valve, wherein the current interface is the first interface or the third interface;

[0012] The temperature detection circuit unit is configured to control the electromagnetic valve to work when the ambient temperature is not greater than a preset temperature.

[0013] 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.

[0014] When the electromagnetic valve is the self-holding electromagnetic valve, the delay circuit unit is specifically configured to turn on the first interface and the third interface and store an electrical signal when the four-way valve is switched to make the air conditioner heat and not defrost.

[0015] After the preset time length, the first interface is disconnected, the second interface is turned on, and the electrical signal is released.

[0016] When the electromagnetic valve is the normally closed electromagnetic valve, the delay circuit unit is specifically configured to turn on the first interface and the third interface, disconnect the third interface and turn on the second interface after the preset time length when the four-way valve is switched to make the air conditioner heat and not defrost.

[0017] According to the low-temperature heating control device based on the air conditioner, the delay circuit unit includes a controller, a switch and a capacitor.

[0018] 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 interface, wherein the remaining interface is the interface other than the current interface among the first interface and the third interface.

[0019] According to the low-temperature heating control device based on the air conditioner, the temperature detection circuit unit includes a thermistor.

[0020] The thermistor is arranged at a position inside an outdoor unit of the air conditioner to represent the ambient temperature.

[0021] When the ambient temperature is greater than the preset temperature, the resistance value of the thermistor does not satisfy a preset resistance value condition, and the electrical signal power obtained by the electromagnetic valve is less than the starting power of the electromagnetic valve.

[0022] In the case that the outside environment temperature is not greater than the preset temperature, the organization of the thermistor satisfies a preset resistance value condition, and the electromagnetic valve obtains an electric signal power that is not less than a starting power of the electromagnetic valve.

[0023] According to the application, the outside environment temperature is a temperature obtained based on a difference between an actual outside environment temperature and a detected temperature.

[0024] According to the application, the minimum value of the preset value is determined by the following formula:

[0025] K min ≥a(P 4wv +P sv ) / P in

[0026] Wherein, K min is the minimum value of the preset value, P 4wv is a rated power of the four-way valve, P sv is a rated power of the electromagnetic valve, P in is an input power of the power amplifier, and a is a first parameter determined based on a power supply voltage fluctuation range.

[0027] According to the application, the maximum value of the preset value is determined by the following formula:

[0028] K max ≤λP (4wv,max)

[0029] Wherein, K max is the maximum value of the preset value, P (4wv,max) is a maximum power of the four-way valve, and λ is a tolerance range, λ is greater than 0.2 and not greater than 1.

[0030] The application further provides a low-temperature heating control method based on an air conditioner, which is applied to the low-temperature heating control device based on an air conditioner.

[0031] The power amplifier is connected in parallel with the four-way valve, 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.

[0032] One end of the temperature checking circuit unit is electrically connected with the second interface, and the other end of the temperature checking 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;

[0033] The method comprises:

[0034] amplifying input power of the power amplifier by the power amplifier;

[0035] In the case that the four-way valve is switched to make the air conditioner heat and not defrost, the first interface and the third interface are turned on;

[0036] After a preset time length, based on the type of the electromagnetic valve, the current interface is turned off, and the second interface is turned on, wherein the current interface is the first interface or the third interface;

[0037] The electromagnetic valve is controlled to work by the temperature checking circuit unit in the case that the external environment temperature is not greater than a preset temperature.

[0038] According to the low-temperature heating control method based on the air conditioner provided by the application, the electromagnetic valve is a self-holding electromagnetic valve or a normally closed electromagnetic valve;

[0039] In the case that the electromagnetic valve is the self-holding electromagnetic valve, in the case that the four-way valve is switched to make the air conditioner heat and not defrost by the delay circuit unit, the first interface and the third interface are turned on, and an electric signal is stored;

[0040] After the preset time length, the first interface is turned off, the second interface is turned on, and the electric signal is released;

[0041] In the case that the electromagnetic valve is the normally closed electromagnetic valve, in the case that the four-way valve is switched to make the air conditioner heat and not defrost by the delay circuit unit, the first interface and the third interface are turned on, after the preset time length, the third interface is turned off, and the second interface is turned on.

[0042] The application provides a low-temperature heating control device and method based on an air conditioner.

[0043] In this way, the control of the electromagnetic valve can be realized without additional interfaces, and the cost can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0045] Figure 1 FIG. 1 is a structural schematic diagram of the low-temperature heating control device based on the air conditioner provided by the application;

[0046] Figure 2 FIG. 2 is a schematic diagram of a circuit corresponding to the four-way valve at present;

[0047] Figure 3 FIG. 3 is another structural schematic diagram of the low-temperature heating control device based on the air conditioner provided by the application;

[0048] Figure 4 FIG. 4 is a third structural schematic diagram of the low-temperature heating control device based on the air conditioner provided by the application;

[0049] Figure 5 FIG. 5 is a first flow schematic diagram of the low-temperature heating control method based on the air conditioner provided by the application;

[0050] Figure 6 FIG. 6 is a second flow schematic diagram of the low-temperature heating control method based on the air conditioner provided by the application;

[0051] Figure 7 This is a schematic diagram of the structure of the electronic device provided by the present invention.

[0052] Figure label:

[0053] 110: Delay circuit unit; 120: Temperature detection circuit unit; 130: Four-way valve; 140: Solenoid valve; 150: Power amplifier; 101: First interface; 102: Second interface; 103: Third interface; 210: Power supply terminal; 220: Current four-way valve; 310: Switch; 320: Controller; 330: Capacitor. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0055] To achieve control of the solenoid valve without adding an additional interface, this invention provides a low-temperature heating control device and method based on an air conditioner. The following describes the method in conjunction with... Figure 1 This invention provides a low-temperature heating control device based on an air conditioner, as described in an embodiment of the present invention:

[0056] like Figure 1 As shown, a low-temperature heating control device based on an air conditioner is disclosed. The device includes: a delay circuit unit 110, a temperature detection circuit unit 120, a four-way valve 130, a solenoid valve 140, and a power amplifier 150. The delay circuit unit 110 includes a first interface 101, a second interface 102, and a third interface 103.

[0057] Power amplifier 150 is connected in parallel with four-way valve 130. One end of four-way valve 130 is electrically connected to first interface 101, and the other end of four-way valve 130 is electrically connected to third interface 103. One end of temperature sensing circuit unit 120 is electrically connected to second interface 102, and the other end of temperature sensing circuit unit 120 is electrically connected to one end of solenoid valve 140. The other end of solenoid valve 140 is electrically connected to the other end of four-way valve 130.

[0058] Power amplifier 150 is used to amplify the input power of power amplifier 105. In one embodiment, the input power can be amplified by amplifying the current while keeping the voltage constant. In another embodiment, the input power can be amplified by simultaneously amplifying both voltage and current; the specific configuration can be determined according to the actual application.

[0059] The delay circuit unit 110 is used to connect the first interface 101 and the third interface 103 when the four-way valve 130 switches to heating mode and non-defrosting mode of the air conditioner. After a preset time, based on the type of solenoid valve 140, the current interface is disconnected and the second interface 102 is connected, wherein the current interface is either the first interface 101 or the third interface 103.

[0060] The aforementioned preset duration is a pre-set duration based on the characteristics of the delay circuit unit 101. The delay circuit unit 101 exists in two states. In the first state, when the four-way valve 130 switches to heating mode for the air conditioner without defrosting, the first interface 101 and the third interface 103 are connected. After the preset duration, the first interface 101 disconnects, and the second interface 102 becomes active.

[0061] In the second scenario, when the four-way valve 130 is switched to heat mode and not defrost mode, the first port 101 and the third port 103 are connected. After a preset time, the third port 103 disconnects and the second port 102 becomes connected.

[0062] The temperature sensing circuit unit 120 is used to control the solenoid valve 140 to operate when the ambient temperature is not higher than a preset temperature. That is, the solenoid valve 140 will operate after the four-way valve 130 switches to a preset time for heating and not defrosting the air conditioner, and when the ambient temperature is not higher than the preset temperature.

[0063] In this way, the low-temperature heating control device based on an air conditioner provided by the embodiments of the present invention can control the solenoid valve without adding additional interfaces, thereby reducing costs.

[0064] To better understand the low-temperature heating control device based on an air conditioner provided in this embodiment of the invention, the circuit corresponding to the four-way valve is described below.

[0065] like Figure 2 As shown, the circuit corresponding to the four-way valve currently includes power supply terminal 210 and the four-way valve 220. (As...) Figure 1 As shown, this embodiment of the invention provides a low-temperature heating control device based on an air conditioner, with a power supply terminal ( Figure 1 The circuit includes a delay circuit unit 110 (not labeled), a temperature detection circuit unit 120, a four-way valve 130, a solenoid valve 140, and a power amplifier 150. The delay circuit unit 110 includes a first interface 101, a second interface 102, and a third interface 103.

[0066] In one embodiment, the low-temperature heating control device based on an air conditioner provided by the embodiment of the present application can be provided with a two-to-one coil, 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 the computer version of the circuit corresponding to the current four-way valve.

[0067] Currently, in the case of using the enthalpy increasing pipe capillary to control the flow, due to different requirements for the enthalpy increasing pipe flow and the superheat degree before and after the enthalpy increase under different working conditions, the fixed-diameter normally open capillary cannot meet the demand of all working conditions and will have a negative impact on some working conditions. For example, after heating optimization, the capillary is more likely to freeze under refrigeration conditions. The low-temperature heating control device based on an air conditioner provided by the embodiment of the present application can avoid the problems existing in the use of the enthalpy increasing pipe capillary to control the flow and can improve the user experience.

[0068] As one embodiment of the embodiment of the present application, the above-mentioned electromagnetic valve is a self-holding electromagnetic valve or a normally closed electromagnetic valve.

[0069] The self-holding electromagnetic valve is an electromagnetic valve adopting a self-locking memory mechanical structure, and the self-holding electromagnetic valve includes a first coil and a second coil. The working principle of the first coil is that in the case of power supply, the first coil is in a working state (open), and then in the case of changing from power supply to power off, the working state (open) is maintained. The working principle of the second coil is that in the case of power supply, the second coil is in a non-working state (closed), and then in the case of changing from power supply to power off, the non-working state (closed) is maintained.

[0070] The normally closed electromagnetic valve is an electromagnetic valve with a default state of a non-working state (closed), and the working principle of the normally closed electromagnetic valve is that in the case of power supply, the normally closed electromagnetic valve is in a working state (open), and in the case of changing from power supply to power off, the normally closed electromagnetic valve is in a non-working state (closed).

[0071] In the case that the electromagnetic valve is the self-holding electromagnetic valve, the delay circuit unit is specifically configured to, in the case that the four-way valve is switched to make the air conditioner heat and not defrost, the first interface and the third interface are conducted, and in the case that the first interface and the third interface are conducted, the electric signal is stored. After the preset time length, 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 storage of the electric signal.

[0072] In the case that the delay circuit unit stores the electric signal, that is, the first interface and the third interface are turned on, the low-temperature heating control device based on the air conditioner provided by the embodiment of the application is in the working state, the delay circuit unit, the four-way valve and the power amplifier are in the working state, and the temperature detection circuit unit and the electromagnetic valve are in the 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.

[0073] In the case that the delay circuit unit releases the electric signal, that is, the second interface and the third interface are turned on, the low-temperature heating control device based on the air conditioner provided by the embodiment of the application is in the working state, the delay circuit unit, the temperature detection circuit unit, the four-way valve, the electromagnetic valve and the power amplifier are in the working state. The delay circuit unit as a temporary power supply can supply power to the temperature detection circuit unit and the electromagnetic valve through the second interface and the third interface, that is, the delay circuit unit, the temperature detection circuit unit and the electromagnetic valve are equivalent to an independent electric path.

[0074] In the case that the electromagnetic valve is the normally closed electromagnetic valve, the delay circuit unit is specifically configured to, in the case that the four-way valve is switched to make the air conditioner perform heating and non-defrosting, turn on the first interface and the third interface, and after the preset time length, turn off the third interface and turn on the second interface.

[0075] That is, in the case that the electromagnetic valve is the normally closed electromagnetic valve, in the case that the four-way valve is switched to make the air conditioner perform heating and non-defrosting, the first interface and the third interface are turned on. After the preset time length, the first interface and the second interface are turned on. In this case, the delay circuit unit does not consume power and does not supply power to the temperature detection circuit unit and the electromagnetic valve.

[0076] It can be seen that, in the embodiment, in the case that the electromagnetic valve is the self-holding electromagnetic valve, the delay circuit unit is used to complete the interface switching and supply power to the temperature detection circuit unit and the electromagnetic valve. In the case that the electromagnetic valve is the normally closed electromagnetic valve, the delay circuit unit is only used to complete the interface switching, so as to control the electromagnetic valve.

[0077] As an embodiment of the application, the above delay circuit unit comprises a controller, a switch and a capacitor. The controller is configured to control the switch, and specifically configured to output a corresponding switching signal in the case that the potential difference between the two ends of the controller reaches a preset potential difference, and the switch can change the connection state based on the switching signal.

[0078] 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 interface, wherein the remaining interface is the interface other than the current interface in the first interface and the third interface.

[0079] When the four-way valve is switched to enable the air conditioner to heat without defrosting, one end of the switch is electrically connected to the current interface, and after a preset time, one end of the switch is electrically connected to the second interface.

[0080] When the solenoid valve is a self-holding solenoid valve, the current interface is the first interface, such as... Figure 3 As shown, when the four-way valve 130 is switched to allow the air conditioner to heat without defrosting, the first interface ( Figure 3 (unlabeled) and the third interface ( Figure 3 (Unlabeled) is connected. Specifically, one end of switch 310 is electrically connected to one end of four-way valve 130 (first interface is connected), the other end of switch 310 is electrically connected to one end of controller 320, the other end of controller 320 is electrically connected to one end of capacitor 330, the other end of capacitor 330 is electrically connected to the other end of four-way valve 130 (third interface is connected), and the other end of capacitor 330 is also electrically connected to one end of solenoid valve 140. In this case, capacitor 330 stores electrical signals.

[0081] After a preset time, i.e., when capacitor 330 is stable, the potential difference across controller 320 reaches the preset potential difference. Controller 320 can then send a corresponding switching signal to switch 310, such as... Figure 4 As shown, based on the switching signal, one end of switch 310 is not electrically connected to one end of the four-way valve 130, but is electrically connected to one end of the temperature sensing circuit unit 120 (equivalent to the first interface being disconnected and the second interface being connected). The other end of the temperature sensing circuit unit 120 is electrically connected to the other end of the solenoid valve 140. In this case, capacitor 330 releases an electrical signal.

[0082] When the solenoid valve is a normally closed solenoid valve, the current interface is the third interface. When the four-way valve is switched to enable the air conditioner to heat and not defrost, the first and third interfaces are connected. Specifically, one end of the switch is electrically connected to one end of the four-way valve (the third interface is connected), the other end of the switch is electrically connected to one end of the controller, the other end of the controller is electrically connected to one end of the capacitor, the other end of the capacitor is electrically connected to the other end of the four-way valve (the first interface is connected), and the other end of the capacitor is also electrically connected to one end of the solenoid valve.

[0083] After a preset time, that is, when the capacitor is stable, the potential difference between the two ends of the controller reaches the preset potential difference. The controller can send a corresponding switching signal to the switch. Based on the switching signal, the switch will disconnect one end of the switch from one end of the four-way valve 130 and connect it to one end of the temperature sensing circuit unit (equivalent to the third interface being disconnected and the second interface being connected). The other end of the temperature sensing circuit unit is connected to the other end of the solenoid valve.

[0084] It can be seen that in the embodiment, the delay circuit unit can include a controller, a switch and a capacitor, and the control of the electromagnetic valve can be realized by the controller, the switch and the capacitor.

[0085] As an embodiment of the present application, the temperature detection circuit unit can include a thermistor.

[0086] At present, the coil circuit is generally arranged in the outdoor unit of the air conditioner, that is, the low-temperature heating control device (including the thermistor) based on the air conditioner provided by the embodiment of the present application can be arranged in the outdoor unit of the air conditioner. When the outdoor unit of the air conditioner is stationary for a long enough time, the temperature outside the outdoor unit of the air conditioner is almost the same as the actual ambient temperature of the outside world.

[0087] When the air conditioner is started, the temperature inside the outdoor unit of the air conditioner is higher than the actual ambient temperature of the outside world, and the temperature that can be detected by the thermistor is greater than the actual ambient temperature of the outside world. In order to detect a more accurate temperature, the thermistor can be arranged at a position in the outdoor unit of the air conditioner that can represent the ambient temperature of the outside world.

[0088] When the ambient temperature of the outside world is greater than the preset temperature, the resistance value of the thermistor does not satisfy the preset resistance value condition, and the power of the electric signal obtained by the electromagnetic valve is less than the starting power of the electromagnetic valve.

[0089] The preset resistance value condition can be set according to actual use. In an embodiment, the preset resistance value condition can be a preset resistance value. When the resistance value of the thermistor is greater than the preset resistance value, it indicates that the resistance value of the thermistor does not satisfy the preset resistance value condition, and the power of the electric signal obtained by the electromagnetic valve is less than the starting power of the electromagnetic valve.

[0090] When the ambient temperature of the outside world is not greater than the preset temperature, the resistance value of the thermistor satisfies the preset resistance value condition, and the power of the electric signal obtained by the electromagnetic valve is not less than the starting power of the electromagnetic valve.

[0091] In an embodiment, when the resistance value of the thermistor is not greater than the preset resistance value, it indicates that the resistance value of the thermistor satisfies the preset resistance value condition, and the power of the electric signal obtained by the electromagnetic valve is not less than the starting power of the electromagnetic valve.

[0092] As an embodiment of the present application, in order to detect a more accurate temperature, the ambient temperature of the outside world is a temperature obtained based on the difference between the actual ambient temperature of the outside world and the detected temperature.

[0093] For example, the actual ambient temperature is -10℃, the temperature sensor obtains a detection temperature difference of 5℃, and the preset temperature can be set to -5℃. That is, the enthalpy increasing function can be started when the ambient temperature is not greater than -5℃. The actual use can be set, and the specific limitation is not given here.

[0094] As an embodiment of the present application, the output power of the power amplifier is a preset multiple of the input power of the power amplifier.

[0095] In an embodiment, the preset multiple has a value range, and the minimum value of the preset multiple can be determined based on the input power, the rated power of the four-way valve, and the rated power of the electromagnetic valve.

[0096] The minimum value of the preset multiple is determined by formula (1):

[0097] K min ≥a(P 4wv +P sv ) / P in (1)

[0098] Wherein, K min is the preset multiple, P 4wv is the rated power of the four-way valve, P sv is the rated power of the electromagnetic valve, P in is the input power of the power amplifier, and a is a first parameter determined based on the power supply voltage fluctuation range.

[0099] The maximum value of the preset multiple is determined based on the maximum power of the four-way valve, and can be determined by formula (2):

[0100] K max ≤λP (4wv,max) (2)

[0101] Wherein, K max is the maximum value of the preset multiple, P (4wv,max) is the maximum power of the four-way valve, and λ is the tolerance range, λ is greater than 0.2 and not greater than 1, and λ can be determined according to actual demand.

[0102] In order to ensure that the power amplification meets the demand, 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 specific output power of the power amplifier satisfies formula (3).

[0103] bP out ≥P 4wv +P sv

[0104] Wherein, b is a second parameter determined based on a power voltage fluctuation range (which can be adjusted according to actual conditions), in the case of an alternating power voltage, the power voltage fluctuation range is +10%-15%, in the case of a direct power voltage, the power voltage fluctuation range is ±10%. If the power voltage fluctuation range is not within the above range, voltage stabilization measures can be taken.

[0105] In a specific embodiment, the power voltage specification can be AC 220-240V, 50 / 60Hz, and the power voltage fluctuation is within the range of 85%-110% for stable operation. The temperature should not exceed 125℃. The rated power is generally between 10-20W. In order to standardize, the same coil can be used for the four-way valve and the electromagnetic valve.

[0106] In the case of calculating the temperature corresponding to the coil, the coil can be regarded as a pure resistance circuit, the voltage, current, duration at both ends of the coil, and the maximum power under the condition of meeting the condition can be calculated after obtaining the material corresponding to the coil. No specific limitation is made here.

[0107] Wherein, the first parameter a in the above formula (1) and the second parameter b in the above formula (3) have a corresponding relationship, for example, in the case of determining the second parameter as 0.85, that is, under the condition of 85% voltage fluctuation, the starting condition is 1 / 0.85=1.176, which is approximately 1.2, that is, the first parameter a in the above formula (1) can be 1.2.

[0108] It can be seen that, in the present embodiment, by designing the parameters of the power amplifier, the low-temperature heating control device based on an air conditioner provided by the present application can be normally operated to control the electromagnetic valve.

[0109] The low-temperature heating control method based on an air conditioner provided by the present application will be described below, and the low-temperature heating control method based on an air conditioner described below can be mutually corresponding and referred to the low-temperature heating control device based on an air conditioner described above.

[0110] As shown in Figure 5 The present embodiment provides a low-temperature heating control method based on an air conditioner, which is applied to any one of the low-temperature heating control devices based on an air conditioner described above, and the device comprises a delay circuit unit, a temperature checking circuit unit, a four-way valve, an electromagnetic valve and a power amplifier, the delay circuit unit comprises a first interface, a second interface and a third interface.

[0111] The power amplifier is connected in parallel with the four-way valve, 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.

[0112] One end of the temperature checking circuit unit is electrically connected with the second interface, and the other end of the temperature checking 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.

[0113] The method comprises:

[0114] S501, amplifying input power of the power amplifier by the power amplifier.

[0115] S502, in the case that the four-way valve is switched to make the air conditioner heat and not defrost, the first interface and the third interface are turned on.

[0116] S503, after a preset time length, based on the type of the electromagnetic valve, the current interface is turned off, and the second interface is turned on.

[0117] The current interface is the first interface or the third interface.

[0118] S504, controlling the electromagnetic valve to work in the case that the external environment temperature is not greater than a preset temperature by the temperature checking circuit unit.

[0119] As an embodiment of the present application, the electromagnetic valve is a self-holding electromagnetic valve or a normally closed electromagnetic valve.

[0120] In the case that the electromagnetic valve is the self-holding electromagnetic valve, the first interface and the third interface are turned on by the delay circuit in the case that the four-way valve is switched to make the air conditioner heat and not defrost, and the electric signal is stored.

[0121] After the preset time length, the first interface is turned off, the second interface is turned on, and the electric signal is released.

[0122] In the case that the electromagnetic valve is the normally closed electromagnetic valve, the first interface and the third interface are turned on by the delay circuit in the case that the four-way valve is switched to make the air conditioner heat and not defrost, the third interface is turned off after the preset time length, and the second interface is turned on.

[0123] As an embodiment of the present application, the delay circuit unit comprises a controller, a switch and a capacitor.

[0124] In the case that the electromagnetic valve is the self-holding electromagnetic valve, the current interface is the first interface, and the capacitor stores the electric signal in the case that the first interface and the third interface are turned on.

[0125] After the preset time length, the potential difference between the two ends of the controller reaches the preset potential difference, the controller sends a switching signal to the switch, and the switch switches to the connection state of making the second interface conductive based on the switching signal, and the capacitor releases the electric signal.

[0126] In the case of the electromagnetic valve being a normally closed electromagnetic valve, the current interface is the third interface, and after the preset time length, the potential difference between the two ends of the controller reaches the preset potential difference, the controller sends a switching signal to the switch, and the switch switches to the connection state of making the second interface conductive based on the switching signal.

[0127] As an embodiment of the present application, the temperature detection circuit unit comprises a thermistor;

[0128] The thermistor is arranged at a position inside the outdoor unit of the air conditioner, which can represent the ambient temperature.

[0129] In the case that the ambient temperature is greater 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 less than the starting power of the electromagnetic valve.

[0130] In the case that the ambient temperature is not greater than the preset temperature, the resistance value of the thermistor meets the preset resistance value condition, and the electric signal power obtained by the electromagnetic valve is not less than the starting power of the electromagnetic valve.

[0131] As an embodiment of the present application, the ambient temperature is a temperature obtained based on the difference between the actual ambient temperature and the detected temperature.

[0132] As an embodiment of the present application, the output power of the power amplifier is a preset multiple of the input power of the power amplifier.

[0133] As an embodiment of the present application, the minimum value of the preset multiple is determined by the following formula:

[0134] K min ≥a(P 4wv +P sv ) / P in

[0135] Wherein, K min is the minimum value of the preset multiple, P 4wv is the rated power of the four-way valve, P sv is the rated power of the electromagnetic valve, P in is the input power of the power amplifier, and a is a first parameter determined based on the power supply voltage fluctuation range.

[0136] As an embodiment of the present application, the maximum value of the preset multiple is determined by the following formula:

[0137] K m ≤λP (4wv,max)

[0138] Among them, K max P is the maximum value of the preset value. (4wv,max) The maximum power of the four-way valve is given by λ, which is the tolerance range. λ is greater than 0.2 and not greater than 1.

[0139] For an air conditioner equipped with the low-temperature heating control device based on the air conditioner provided in the embodiments of the present invention, it can perform... Figure 6 The steps shown are as follows:

[0140] like Figure 6 As shown, an air conditioner equipped with the low-temperature heating control device based on an air conditioner provided in this embodiment of the invention can perform the following steps:

[0141] S601, Air conditioner starts.

[0142] S602, determine whether the current operating mode is heating mode. If the current operating mode is heating mode, execute step S603. If the current operating mode is not heating mode, execute step S608.

[0143] S603, determine whether it is defrost mode. If it is in defrost mode, proceed to step S604. If it is not in defrost mode, proceed to step S605.

[0144] S604, Do not switch the state of the four-way valve (closed) and proceed to step S608.

[0145] S605, switch the state of the four-way valve (open).

[0146] This means switching the four-way valve to the state corresponding to heating the air conditioner and not defrosting.

[0147] S606, determine whether the ambient temperature is greater than the preset temperature. If the ambient temperature is greater than the preset temperature, proceed to step S608. If the ambient temperature is not greater than the preset temperature, proceed to step S607.

[0148] Specifically, this can be determined using a thermistor.

[0149] S607, after a preset time, the solenoid valve is in the working state (open).

[0150] S608, End control.

[0151] Figure 7 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 7As shown, the electronic device can include a processor 710, a communications interface 720, a memory 730, and a communications bus 740, wherein the processor 710, the communications interface 720, and the memory 730 complete mutual communication through the communications bus 740. The processor 710 can invoke a logic instruction in the memory 730 to execute the low-temperature heating control method based on the air conditioner, the method including amplifying input power of a power amplifier by the power amplifier, in the case that a four-way valve is switched to make the air conditioner heat and not defrost, the first interface and the third interface are turned on, after a preset time length, based on the type of the electromagnetic valve, the current interface is disconnected, and the second interface is turned on, wherein the current interface is the first interface or the third interface, and the electromagnetic valve is controlled to work in the case that the external environment temperature is not greater than a preset temperature by the temperature sensing circuit unit.

[0152] In addition, the logic instruction in the memory 730 described above can be implemented in the form of a software function unit and sold or used as an independent product, and can be stored in a computer-readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0153] On the other hand, the present application also provides a computer program product, the computer program product includes a computer program, the computer program can be stored on a non-transitory computer readable storage medium, when the computer program is executed by a processor, the computer can execute the low-temperature heating control method based on the air conditioner provided by the above-mentioned method, the method includes amplifying the input power of the power amplifier by the power amplifier, in the case that the four-way valve is switched to make the air conditioner heat and not defrost, the first interface and the third interface are turned on, after a preset time length, based on the type of the electromagnetic valve, the current interface is disconnected, and the second interface is turned on, wherein the current interface is the first interface or the third interface, and the electromagnetic valve is controlled to work in the case that the external environment temperature is not greater than a preset temperature by the temperature sensing circuit unit.

[0154] In yet another aspect, the present application also provides a non-transitory computer readable storage medium having stored thereon a computer program, which, when executed by a processor, implements the low-temperature heating control method based on an air conditioner provided by each of the above methods, and the method comprises amplifying input power of a power amplifier by the power amplifier, in the case that a four-way valve is switched to make the air conditioner perform heating and non-defrosting, the first interface and the third interface are turned on, after a preset time length, based on the type of the electromagnetic valve, the current interface is disconnected, and the second interface is turned on, wherein the current interface is the first interface or the third interface, and the electromagnetic valve is controlled to work by the temperature sensing circuit unit in the case that the external environment temperature is not greater than a preset temperature.

[0155] The device embodiments described above are merely illustrative, wherein the units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed on multiple network units. Part or all of the modules can be selected to achieve the purpose of the embodiment scheme according to actual needs. Those skilled in the art can understand and implement without creative labor.

[0156] From the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be realized by means of software and the necessary general hardware platform, and of course, can also be realized by hardware. Based on such understanding, the above technical solutions can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes a number of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in each embodiment or some parts of the embodiment.

[0157] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An air conditioner-based low-temperature heating control device, characterized by comprising: The device comprises a delay circuit unit, a temperature checking circuit unit, a four-way valve, a solenoid valve and a power amplifier, the delay circuit unit comprises a first interface, a second interface and a third interface; The power amplifier is connected in parallel with the four-way valve, 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 checking circuit unit is electrically connected with the second interface, the other end of the temperature checking circuit unit is electrically connected with one end of the solenoid valve, and the other end of the solenoid 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 delay circuit unit is used for making the first interface and the third interface conductive when the four-way valve is switched to make the air conditioner heat and not defrost; After a preset time length, based on the type of the solenoid valve, the current interface is disconnected, and the second interface is conducted, wherein the current interface is the first interface or the third interface; The temperature checking circuit unit is used for controlling the solenoid valve to work when the external environment temperature is not greater than a preset temperature.

2. The low temperature heat pump control based on an air conditioner according to claim 1, wherein The solenoid valve is a self-holding solenoid valve or a normally closed solenoid valve; When the solenoid valve is the self-holding solenoid valve, the delay circuit unit is specifically used for making the first interface and the third interface conductive and storing an electrical signal when the four-way valve is switched to make the air conditioner heat and not defrost; After the preset time length, the first interface is disconnected, the second interface is conducted, and the electrical signal is released; When the solenoid valve is the normally closed solenoid valve, the delay circuit unit is specifically used for making the first interface and the third interface conductive, disconnecting the third interface and conducting the second interface after the preset time length.

3. The low temperature heat pump control based on an air conditioner according to claim 1, wherein 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 a remaining interface, wherein the remaining interface is an interface other than the current interface in the first interface and the third interface.

4. The low temperature heat pump control based on an air conditioner according to claim 1, wherein The temperature checking circuit unit comprises a thermistor; The thermistor is arranged in the internal position of the outdoor unit of the air conditioner to represent the external environment temperature; When the external environment temperature is greater than the preset temperature, the resistance value of the thermistor does not satisfy a preset resistance value condition, and the electrical signal power obtained by the solenoid valve is less than the starting power of the solenoid valve; When the external environment temperature is not greater than the preset temperature, the resistance value of the thermistor satisfies the preset resistance value condition, and the electrical signal power obtained by the solenoid valve is not less than the starting power of the solenoid valve.

5. The low temperature heat pump control based on an air conditioner according to claim 4, wherein The external environment temperature is a temperature obtained based on the difference between the actual external environment temperature and the detected temperature.

6. The low-temperature heating control based on an air conditioner according to any one of claims 1 to 5, characterized in that, The output power of the power amplifier is a preset multiple of the input power of the power amplifier.

7. The low-temperature heating control based on an air conditioner according to claim 6, wherein The minimum value of the preset value is determined by the following formula: K min ≥a(P 4wv +P sv ) / P in Wherein, K min is the minimum value of the preset value, P 4wv is the rated power of the four-way valve, P sv is the rated power of the electromagnetic valve, P in is the input power of the power amplifier, and a is a first parameter determined based on a power supply voltage fluctuation range.

8. The low temperature heat pump control based on an air conditioner according to claim 6, wherein The maximum value of the preset value is determined by the following formula: K max ≤λP (4wv,max) Wherein, K max is the maximum value of the preset value, P (4wv,max) is the maximum power of the four-way valve, and λ is the tolerance range, λ is greater than 0.2, and λ is not greater than 1.

9. An air conditioner-based low-temperature heating control method, characterized by, The method is applied to the low-temperature heating control device based on the air conditioner according to any one of claims 1-8, and the device comprises a delay circuit unit, a temperature detection circuit unit, a four-way valve, a solenoid valve and a power amplifier, the delay circuit unit comprises a first interface, a second interface and a third interface; The power amplifier is connected in parallel with the four-way valve, 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 detection circuit unit is electrically connected with the second interface, and the other end of the temperature detection circuit unit is electrically connected with one end of the solenoid valve, and the other end of the solenoid valve is electrically connected with the other end of the four-way valve; The method comprises: amplifying the input power of the power amplifier through the power amplifier; In the case that the four-way valve is switched to make the air conditioner heat and not defrost, the first interface and the third interface are turned on; After a preset time length, based on the type of the solenoid valve, the current interface is disconnected, and the second interface is turned on, wherein the current interface is the first interface or the third interface; controlling the solenoid valve to work when the external environment temperature is not greater than a preset temperature through the temperature detection circuit unit.

10. The low-temperature heating control method based on an air conditioner according to claim 9, characterized by, The solenoid valve is a self-holding solenoid valve or a normally closed solenoid valve; In the case that the solenoid valve is the self-holding solenoid valve, in the case that the four-way valve is switched to make the air conditioner heat and not defrost through the delay circuit unit, the first interface and the third interface are turned on, and an electrical signal is stored; After the preset time length, the first interface is disconnected, the second interface is turned on, and the electrical signal is released; In the case that the solenoid valve is the normally closed solenoid valve, in the case that the four-way valve is switched to make the air conditioner heat and not defrost, the first interface and the third interface are turned on through the delay circuit unit, after the preset time length, the third interface is disconnected, and the second interface is turned on.

Images