Air conditioning equipment

Abstract

The utility model discloses air conditioning equipment, which is characterized in that a zero-ohm resistor, a voltage stabilizing diode combination and a BUCK power supply chip are designed in a power supply circuit, and a feedback pin of the BUCK power supply chip is selectively connected with a first end of the zero-ohm resistor or an anode of one of the voltage stabilizing diodes; the second end of the zero-ohm resistor and the cathode of any one of the voltage stabilizing diodes are connected with the cathode of the feedback diode, or the feedback pin is connected with the first end of the zero-ohm resistor and the anode of any one of the voltage stabilizing diodes, and the cathode of the feedback diode is selectively connected with the second end of the zero-ohm resistor or the cathode of one of the voltage stabilizing diodes. According to the air conditioning equipment, the zero-ohm resistor or the voltage stabilizing diode is selected, so that the voltage output end outputs different voltage values, different power supply requirements of different loads are met, the air conditioning equipment is suitable for various loads and high in universality, and the technical problems that in the prior art, a power circuit is not suitable for various loads and poor in universality are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioning technology field especially air conditioning equipment. BACKGROUND

[0002] Current central air conditioning products are facing huge competitive pressure, the power supply isolation scheme cost is higher, the power supply scheme of subsequent products has the tendency of gradually changing to the non-isolation scheme, and the BUCK power supply as the non-isolation scheme becomes the first choice.

[0003] The BUCK power supply of the current air conditioning product can only output + 15V, and this voltage is no problem for driving the motor, but cannot meet other application occasions.

[0004] For example, the wire controller, the current wire controller power supply voltage is + 17V, and it may be upgraded to + 24V in the future, and the current BUCK power supply cannot meet the power supply demand of the wire controller.

[0005] Therefore, the current power supply is not suitable for multiple loads and has poor versatility. SUMMARY

[0006] The utility model provides air conditioning equipment, solved the technical problem that power supply circuit in the prior art is not suitable for multiple loads and has poor versatility.

[0007] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0008] The utility model provides air conditioning equipment, including power supply circuit, the power supply circuit includes:

[0009] Power input end;

[0010] Power output end;

[0011] Zero ohm resistance;

[0012] Voltage stabilizing diode combination, it includes several voltage stabilizing diodes;

[0013] BUCK power supply chip, its input pin is connected with the power input end, and its output pin is connected with the first end of inductance, the second end of the inductance is connected with the power output end, and the second end of the inductance is connected with the anode of feedback diode;

[0014] The feedback pin of the BUCK power supply chip is selectively connected with the first end of the zero ohm resistance or the anode of one of the voltage stabilizing diodes, and the second end of the zero ohm resistance and the cathode of any voltage stabilizing diode are connected with the cathode of the feedback diode;

[0015] Or, the feedback pin of the BUCK power chip is connected with the first end of the zero-ohm resistor and the anode of any one of the zener diodes, and the cathode of the feedback diode is selectively connected with the second end of the zero-ohm resistor or the cathode of any one of the zener diodes.

[0016] In some embodiments of the present application, the power supply circuit further comprises:

[0017] The first single-pole multi-throw switch comprises:

[0018] The moving contact is connected with the feedback pin;

[0019] The plurality of static contacts are connected with the first end of the zero-ohm resistor and the anode of each of the plurality of zener diodes one by one; and the second end of the zero-ohm resistor and the cathode of any one of the zener diodes are connected with the cathode of the feedback diode.

[0020] In some embodiments of the present application, the power supply circuit further comprises:

[0021] The second single-pole multi-throw switch comprises:

[0022] The moving contact is connected with the cathode of the feedback diode;

[0023] The plurality of static contacts are connected with the second end of the zero-ohm resistor and the cathode of each of the plurality of zener diodes one by one; and the first end of the zero-ohm resistor and the anode of any one of the zener diodes are connected with the feedback pin.

[0024] In some embodiments of the present application, the power supply circuit further comprises a plurality of switching elements; the plurality of switching elements are connected with the zero-ohm resistor and the plurality of zener diodes one by one;

[0025] One of the switching elements is connected in series in a connection line between the zero-ohm resistor and the feedback pin, or in a connection line between the zero-ohm resistor and the feedback diode;

[0026] The remaining switching elements are respectively connected in series in a connection line between the corresponding zener diode and the feedback pin, or in a connection line between the corresponding zener diode and the feedback diode.

[0027] In some embodiments of the present application, the switching element is a triode or a MOS tube.

[0028] The utility model provides air conditioning equipment, including power supply circuit, the power supply circuit includes:

[0029] The power supply input end;

[0030] The power supply output end;

[0031] A voltage stabilizing diode combination comprising a plurality of voltage stabilizing diodes with different voltage stabilization values;

[0032] A BUCK power chip, an input pin of which is connected to the power input end; an output pin of which is connected to a first end of an inductor, a second end of the inductor is connected to the power output end, and the second end of the inductor is connected to an anode of a feedback diode;

[0033] A feedback pin of the BUCK power chip is selectively connected to an anode of one of the voltage stabilizing diodes, and a cathode of any voltage stabilizing diode is connected to a cathode of the feedback diode;

[0034] Alternatively, the feedback pin of the BUCK power chip is connected to an anode of any voltage stabilizing diode, and a cathode of the feedback diode is selectively connected to a cathode of one of the voltage stabilizing diodes.

[0035] In some embodiments of the present application, the power supply circuit further comprises:

[0036] A third single-pole multi-throw switch comprising:

[0037] A moving contact connected to the feedback pin;

[0038] A plurality of static contacts, each of which is connected to an anode of one of the voltage stabilizing diodes, and a cathode of any voltage stabilizing diode is connected to a cathode of the feedback diode.

[0039] In some embodiments of the present application, the power supply circuit further comprises:

[0040] A fourth single-pole multi-throw switch comprising:

[0041] A moving contact connected to the cathode of the feedback diode;

[0042] A plurality of static contacts, each of which is connected to a cathode of one of the voltage stabilizing diodes, and an anode of any voltage stabilizing diode is connected to the feedback pin.

[0043] In some embodiments of the present application, the power supply circuit further comprises a plurality of switching elements, each of which is connected to one of the voltage stabilizing diodes;

[0044] Any of the switching elements is connected in series in a connection line between the corresponding voltage stabilizing diode and the feedback pin, or in a connection line between the corresponding voltage stabilizing diode and the feedback diode.

[0045] In some embodiments of the present application, the switching element is a triode or a MOS tube.

[0046] The technical scheme of the air conditioning equipment has the following technical effects relative to the prior art: the air conditioning equipment is provided with a zero-ohm resistor, a voltage stabilizing diode combination and a BUCK power supply chip in the power supply circuit, the feedback pin of the BUCK power supply chip is selectively connected with the first end of the zero-ohm resistor or the anode of any one of the voltage stabilizing diodes, the second end of the zero-ohm resistor and the cathode of any one of the voltage stabilizing diodes are connected with the cathode of a feedback diode, or the feedback pin is connected with the first end of the zero-ohm resistor and the anode of any one of the voltage stabilizing diodes, and the cathode of the feedback diode is selectively connected with the second end of the zero-ohm resistor or the cathode of any one of the voltage stabilizing diodes. The air conditioning equipment can select the zero-ohm resistor or the voltage stabilizing diodes with different voltage stabilizing values to be connected in series between the feedback pin and the feedback diode, so that different voltage values are output from the voltage output end, thereby meeting different power supply requirements of different loads, being suitable for various loads and having high versatility, and solving the technical problems of the prior art that the power supply circuit is not suitable for various loads and has poor versatility.

[0047] Other features and advantages of the present application will become more apparent from the following detailed description when read in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0048] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0049] Figure 1 The circuit principle diagram of one embodiment of the power supply circuit of the air conditioning equipment of the present application;

[0050] Figure 2 The circuit principle diagram when the zero-ohm resistor is selected to be connected;

[0051] Figure 3 The circuit principle diagram when the voltage stabilizing diode is selected to be connected;

[0052] Figure 4 The frame diagram of Figure 3

[0053] Figure 5 The parameter diagram of the voltage stabilizing diode;

[0054] Figure 6 The current waveform diagram of the voltage stabilizing diode;

[0055] Figure 7 The parameter diagram of the voltage stabilizing diode;

[0056] Figure 8 ​Connection diagram of the first single-pole multi-throw switch K1;

[0057] Figure 9 Connection diagram of the second single-pole multi-throw switch K2;

[0058] Figure 10 Connection diagram of one embodiment of the switching element;

[0059] Figure 11 Connection diagram of another embodiment of the switching element;

[0060] Figure 12 Circuit principle diagram of another embodiment of the power supply circuit of the air conditioning equipment of the utility model;

[0061] Figure 13 Connection diagram of the third single-pole multi-throw switch K3;

[0062] Figure 14 Connection diagram of the fourth single-pole multi-throw switch K4;

[0063] Figure 15 Connection diagram of one embodiment of the switching element;

[0064] Figure 16 Connection diagram of another embodiment of the switching element. DETAILED DESCRIPTION

[0065] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without any creative work fall within the scope of protection of the present application.

[0066] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0067] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0068] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0069] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0070] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0071] Air conditioners execute refrigeration and heating cycles using a compressor, condenser, expansion valve, and evaporator. These cycles are controlled by a controller, which manages the refrigerant flow and the opening of the expansion valve. The refrigeration and heating cycles involve a series of processes including compression, condensation, expansion, and evaporation, ultimately supplying refrigerant to the conditioned and heat-exchanged air.

[0072] The compressor compresses refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0073] The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a refrigeration effect by exchanging heat with a material to be cooled using latent heat of evaporation of the refrigerant. Throughout the cycle, the air conditioner can adjust the temperature of an indoor space.

[0074] The air conditioner outdoor unit refers to a portion of the refrigeration cycle including the compressor and the outdoor heat exchanger, the air conditioner indoor unit includes the indoor heat exchanger, and the expansion valve can be provided in the air conditioner outdoor unit or the indoor unit.

[0075] The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. When the indoor heat exchanger serves as a condenser, the air conditioner functions as a heater in a heating mode, and when the indoor heat exchanger serves as an evaporator, the air conditioner functions as a cooler in a cooling mode.

[0076] The air conditioning apparatus of the present embodiment includes a power supply circuit.

[0077] The power supply circuit includes a power supply input terminal VIN, a power supply output terminal VOUT, a zero-ohm resistor R0, a voltage stabilizing diode combination, a BUCK power supply chip ICl, an inductor L2, a feedback diode D1, and the like, as shown in FIG. 1. Figure 1

[0078] The power supply input terminal VIN is used to input high-voltage direct current. For example, direct current of 0 V is input.

[0079] The power supply output terminal VOUT is used to output a voltage required by a load.

[0080] The voltage stabilizing diode combination includes a plurality of voltage stabilizing diodes. When the plurality is a plurality, the plurality of voltage stabilizing diodes have different stable voltage values.

[0081] The BUCK power supply chip ICl has an input pin, an output pin, a feedback pin, and the like.

[0082] The input pin is connected to the power supply input terminal VIN and is used to input high-voltage direct current.

[0083] The output pin is connected to the first end of the inductor L2, the second end of the inductor L2 is connected to the power supply output terminal VOUT, and the second end of the inductor L2 is connected to the anode of the feedback diode D1.

[0084] ​The feedback pin is alternatively connected with the first end of the zero-ohm resistor R0 or the anode of one of the zener diodes, the second end of the zero-ohm resistor R0 and the cathode of any zener diode are connected with the cathode of the feedback diode D1. That is, the feedback pin selects the zero-ohm resistor R0 or one of the zener diodes to be connected between the feedback pin and the feedback diode D1, as shown in Figure 8 .

[0085] Alternatively, the feedback pin is connected with the first end of the zero-ohm resistor R0 or the anode of any zener diode, and the cathode of the feedback diode D1 is alternatively connected with the second end of the zero-ohm resistor R0 or the cathode of one of the zener diodes. That is, the cathode of the feedback diode D1 selects the zero-ohm resistor R0 or one of the zener diodes to be connected between the feedback pin and the feedback diode D1, as shown in Figure 9 .

[0086] Therefore, through the feedback pin of the BUCK power supply chip ICl or the feedback diode D1, the zero-ohm resistor R0 or one of the zener diodes is selected to be connected between the feedback pin and the feedback diode D1.

[0087] When the zero-ohm resistor R0 is selected to be connected between the feedback pin and the feedback diode D1 of the ICl, the zero-ohm resistor R0 is equivalent to a wire, and thus, the cathode of the feedback diode D1 is equivalent to being connected to the feedback pin, as shown in Figure 2 .

[0088] When one of the zener diodes ZD2 is selected to be connected between the feedback pin and the feedback diode D1 of the ICl, the cathode of the feedback diode D1 is connected to the cathode of the zener diode ZD2, and the anode of the zener diode ZD2 is connected to the feedback pin, as shown in Figure 3 . Figure 4 The frame diagram for selecting the zener diode ZD2.

[0089] In some embodiments of the present application, the first end of the inductor L2 is connected to the first end of the bootstrap capacitor C9, the second end of the bootstrap capacitor C9 is connected to the feedback pin of the ICl. The second end of the inductor L2 is connected to the first end of the capacitor C10, the second end of the capacitor C10 is connected to the anode of the freewheeling diode D3, the cathode of the freewheeling diode D3 is connected to the first end of the inductor L2. The second end of the capacitor C10 is grounded. The two ends of the capacitor C10 are connected in parallel with the resistors R1 and R2.

[0090] It is assumed that the reference voltage Vcnt of the chip ICl ranges from 15.3V±0.5V, the voltage VD3 of the freewheeling diode D3 is 1V, and the voltage VD1 of the feedback diode D1 is 0.7V.

[0091] When the zero-ohm resistor R0 is selected to be connected, as shown in Figure 2The voltage Vout at the power output terminal VOUT is Vcnt-VD3+VD1=15V±0.5V.

[0092] Therefore, the lower limit of the output voltage of the power output terminal VOUT is +14.5V, and the upper limit is +15.5V, which meets the driving voltage requirement of driving an external motor.

[0093] For the power supply circuit of the drive-by-wire controller, a voltage of +17V or +24V is required, and therefore, a zener diode needs to be selected to increase the output voltage.

[0094] When the zener diode ZD2 is selected, as shown in Figure 3 .

[0095] Since the zener diode ZD2 is added, the voltage Vout at the power output terminal VOUT is Vcnt-VD3+VD1+VZD2.

[0096] When the power output terminal VOUT needs to output a voltage of 17V. Assuming that the zener voltage VZD2 of the selected zener diode ZD2 is 3V, then Vout=18±0.5V. Since the power supply voltage range of the drive-by-wire controller is 17V±2V, the output voltage of the power output terminal VOUT meets the use requirement of the drive-by-wire controller, and a zener diode with a zener voltage of 3V needs to be selected.

[0097] When the power output terminal VOUT needs to output a voltage of 24V. Assuming that the zener voltage VZD2 of the selected zener diode ZD2 is 9.1V, then Vout=24.1±0.5V. Since the power supply voltage range of the drive-by-wire controller is 24V±2.4V, the output voltage of the power output terminal VOUT meets the use requirement of the drive-by-wire controller, and a zener diode with a zener voltage of 9.1V needs to be selected.

[0098] When zener diodes with different zener voltages are selected, the output voltage of the power output terminal VOUT is different.

[0099] Compared with selecting a zero-ohm resistor, selecting a zener diode increases the output voltage of the power output terminal VOUT.

[0100] Therefore, by selecting a zero-ohm resistor R0 or a zener diode with different zener voltages to be connected in series between the feedback pin and the feedback diode D1, the voltage output terminal VOUT can output different voltage values to meet different power supply requirements of different loads.

[0101] The air conditioning equipment of the embodiment, through designing zero ohm resistance, voltage stabilizing diode combination and BUCK power supply chip in the power supply circuit, the feedback pin of the BUCK power supply chip is selectively connected with the first end of the zero ohm resistance R0 or the anode of any one of the voltage stabilizing diodes, the second end of the zero ohm resistance R0 and the cathode of any one of the voltage stabilizing diodes are connected with the cathode of the feedback diode D1, or the feedback pin is connected with the first end of the zero ohm resistance R0 and the anode of any one of the voltage stabilizing diodes, and the cathode of the feedback diode D1 is selectively connected with the second end of the zero ohm resistance R0 or the cathode of any one of the voltage stabilizing diodes. The air conditioning equipment of the embodiment, through selecting the zero ohm resistance R0 or the voltage stabilizing diodes with different voltage stabilizing values and connecting them in series between the feedback pin and the feedback diode D1, makes the voltage output end VOUT output different voltage values, so as to meet different power supply requirements of different loads, is suitable for various loads and has strong versatility, and solves the technical problems of the prior art that the power supply circuit is not suitable for various loads and has poor versatility.

[0102] When the voltage output end VOUT needs to output 17V, it is assumed that the voltage stabilizing diode type selected to access the circuit is SMA4727A, and the parameters of SMA4727A are as shown in the following table. Figure 5

[0103] As shown in the following table. Figure 5 It can be known that when the reverse current reaches 0.08A, the voltage stabilizing interval of the voltage stabilizing diode is 2.85V-3.15V, the upper limit of Vout is 15.3-1+0.7+3.15=18.15V+0.5V=18.65V, the lower limit of Vout is 15.3-1+0.7+2.85=17.85V-0.5V=17.35V, and the output voltage meets the requirement.

[0104] The actual current peak value is 0.456A, as shown in the following table. Figure 6 According to the surge current parameters of the voltage stabilizing diode, the maximum surge current is 1.485A, and the pulse width is 8.3ms, while the actual pulse width is only 0.56ms, so the current margin is sufficient. As for the power, the dissipation power of the actual voltage stabilizing diode can be calculated, the effective value of the actually tested current is 0.027mA, P=U*I=3.15*0.027=0.085W<<1W, so the design margin requirement is met.

[0105] When the voltage output end VOUT needs to output 24V, it is assumed that the voltage stabilizing diode type selected to access the circuit is SMAF4739A, and the parameters of SMAF4739A are as shown in the following table. Figure 7

[0106] As shown in the following table. Figure 7 ​​It can be seen that when the reverse current reaches 0.028A, the voltage stabilizing interval of the voltage stabilizing diode is 8.65V-9.56V, the upper limit of Vout is 15.3-1+0.7+9.56=24.56V+0.5V=25.06V, the lower limit of Vout is 15.3-1+0.7+8.65=23.65V-0.5V=23.15V, and the output voltage meets the requirements.

[0107] As above, the actual current peak value is 0.456A, according to the surge current parameter of the voltage stabilizing diode, the maximum surge current is 0.5A, and the pulse width is 8.3ms, while the actual pulse width is only 0.56ms, so the current meets the requirements. As for the power, the dissipation power of the actual voltage stabilizing diode can be calculated, the effective value of the actual test current is 0.027mA, P=U*I=9.56*0.027=0.258W<1W, so it meets the design margin requirements.

[0108] In some embodiments of the application, the zero-ohm resistor R0 can be selected as a patch resistor. For example, a 1206 patch resistor. The voltage stabilizing diode package can be compatible with the zero-ohm 1206 patch resistor package.

[0109] The power supply circuit of the embodiment can not only improve the output voltage range, but also be universal. When +15V is required at the power supply output end VOUT, a zero-ohm resistor is selected. When +17V or +24V is required at the power supply output end VOUT, a voltage stabilizing diode with a corresponding voltage stabilizing value is selected to achieve compatibility and universality. On the one hand, it is compatible with the original +15V voltage output scheme, and on the other hand, it improves the output voltage and can be used for power supply of a line control device.

[0110] Therefore, the power supply circuit of the air conditioning equipment of the embodiment can improve the output voltage according to the load demand, thereby expanding the use range to adapt to more loads. The power supply circuit of the embodiment expands the use range, improves the universality, and reduces the cost.

[0111] In some embodiments of the application, the power supply circuit further comprises a first single-pole multi-throw switch K1, as shown in Figure 8 The first single-pole multi-throw switch K1 comprises a moving contact and a plurality of static contacts.

[0112] The moving contact a of the first single-pole multi-throw switch K1 is connected with the feedback pin of the BUCK power supply chip IC1.

[0113] The plurality of static contacts of the first single-pole multi-throw switch K1 are connected with the first end of the zero-ohm resistor R0 and the anodes of the plurality of voltage stabilizing diodes one by one; the second end of the zero-ohm resistor R0 and the cathode of any voltage stabilizing diode are connected with the cathode of the feedback diode D1.

[0114] For example, the combination of voltage stabilizing diodes includes voltage stabilizing diode ZD1 and voltage stabilizing diode ZD2. The first single-pole multi-throw switch K1 includes a moving contact a and three stationary contacts b1, b2, and b3. The moving contact a is connected to the feedback pin of the BUCK power chip ICl.

[0115] The stationary contact b1 is connected to the first end of the zero-ohm resistor R0, the stationary contact b2 is connected to the anode of the voltage stabilizing diode ZD1, the stationary contact b3 is connected to the anode of the voltage stabilizing diode ZD2, the second end of the zero-ohm resistor R0, the cathode of the voltage stabilizing diode ZD1, and the cathode of the voltage stabilizing diode ZD2 are connected to the cathode of the feedback diode D1.

[0116] The moving contact a of the first single-pole multi-throw switch K1 can be selected to be connected to one of the stationary contacts b1, b2, and b3, thereby selecting one of the zero-ohm resistor R0, the voltage stabilizing diode ZD1, and the voltage stabilizing diode ZD2.

[0117] Through the design of the above-mentioned first single-pole multi-throw switch K1, the feedback pin of the BUCK power chip ICl can be conveniently selected to be connected to the zero-ohm resistor R0 or one of the voltage stabilizing diodes.

[0118] In some embodiments of the present application, the power supply circuit further includes a second single-pole multi-throw switch K2, as shown in Figure 9 The second single-pole multi-throw switch K2 includes a moving contact and a plurality of stationary contacts.

[0119] The moving contact a of the second single-pole multi-throw switch K2 is connected to the cathode of the feedback diode D1.

[0120] The plurality of stationary contacts of the second single-pole multi-throw switch K2 are connected to the second end of the zero-ohm resistor R0 and the cathodes of the plurality of voltage stabilizing diodes one by one; the first end of the zero-ohm resistor R0 and the anodes of any voltage stabilizing diode are connected to the feedback pin.

[0121] For example, the combination of voltage stabilizing diodes includes voltage stabilizing diode ZD1 and voltage stabilizing diode ZD2. The second single-pole multi-throw switch K2 includes a moving contact a and three stationary contacts b1, b2, and b3. The moving contact a is connected to the cathode of the feedback diode D1.

[0122] The stationary contact b1 is connected to the second end of the zero-ohm resistor R0, the stationary contact b2 is connected to the cathode of the voltage stabilizing diode ZD1, the stationary contact b3 is connected to the cathode of the voltage stabilizing diode ZD2, the first end of the zero-ohm resistor R0, the anode of the voltage stabilizing diode ZD1, and the anode of the voltage stabilizing diode ZD2 are connected to the feedback pin of the BUCK power chip ICl.

[0123] The moving contact a of the second single-pole multi-throw switch K2 can be selected to be connected to one of the stationary contacts b1, b2, and b3, thereby selecting one of the zero-ohm resistor R0, the voltage stabilizing diode ZD1, and the voltage stabilizing diode ZD2.

[0124] By designing the second single-pole multi-throw switch K2, the feedback diode D1 can be conveniently selected to be connected to the zero ohm resistor R0 or one of the voltage stabilizing diodes.

[0125] In some embodiments of the present application, the power supply circuit further comprises a plurality of switching elements; the plurality of switching elements correspond one-to-one to the zero ohm resistor and the plurality of voltage stabilizing diodes.

[0126] One of the switching elements is connected in series in the connection line between the zero ohm resistor R0 and the feedback pin, or in the connection line between the zero ohm resistor R0 and the feedback diode D1.

[0127] The remaining switching elements are each connected in series in the connection line between the corresponding voltage stabilizing diode and the feedback pin, or in the connection line between the corresponding voltage stabilizing diode and the feedback diode D1.

[0128] For example, the combination of voltage stabilizing diodes includes voltage stabilizing diode ZD1 and voltage stabilizing diode ZD2. Three switching elements (K10, K11, K12) correspond one-to-one to the zero ohm resistor R0, the voltage stabilizing diode ZD1, and the voltage stabilizing diode ZD2.

[0129] For example, as shown in FIG. 2, the switching element K10 is connected in series in the connection line between the zero ohm resistor R0 and the feedback pin, the switching element K11 is connected in series in the connection line between the voltage stabilizing diode ZD1 and the feedback pin, and the switching element K12 is connected in series in the connection line between the voltage stabilizing diode ZD2 and the feedback pin. Figure 10 For example, as shown in FIG. 3, the switching element K10 is connected in series in the connection line between the zero ohm resistor R0 and the feedback diode D1, the switching element K11 is connected in series in the connection line between the voltage stabilizing diode ZD1 and the feedback diode D1, and the switching element K12 is connected in series in the connection line between the voltage stabilizing diode ZD2 and the feedback diode D1.

[0130] Figure 11 By designing the plurality of switching elements, the connection and disconnection of the zero ohm resistor R0 and each voltage stabilizing diode can be conveniently controlled, so that the required zero ohm resistor or voltage stabilizing diode can be conveniently selected.

[0131]

[0132] In some embodiments of the present application, the switching element is a triode or a MOS tube.

[0133] The triode or the MOS tube is convenient to control the connection and disconnection, and has stable performance.

[0134] The triode or the MOS tube can be controlled by an air conditioner controller.

[0135] In some embodiments of the present application, the power supply circuit is installed in an outdoor unit of an air conditioning device, and is used to supply power to the outdoor unit. ​​

[0136] In some embodiments of the present application, the power supply circuit is installed in an indoor unit of an air conditioning device, and is used to supply power to the indoor unit.

[0137] In some embodiments of the present application, the air conditioning device comprises a power supply circuit.

[0138] The power supply circuit comprises a power input terminal VIN, a power output terminal VOUT, a voltage stabilizing diode combination, a BUCK power chip IC1, an inductor L2, a feedback diode D1, and the like, as shown in Figure 12 .

[0139] The power input terminal VIN is used to connect high-voltage direct current. For example, direct current of 0V is connected.

[0140] The power output terminal VOUT is used to output the voltage required by the load.

[0141] The voltage stabilizing diode combination comprises a plurality of voltage stabilizing diodes with different stable voltage values. The stable voltage values of the plurality of voltage stabilizing diodes are different.

[0142] The BUCK power chip IC1 has an input pin, an output pin, a feedback pin, and the like.

[0143] The input pin is connected to the power input terminal VIN, and is used to connect high-voltage direct current.

[0144] The output pin is connected to the first end of the inductor L2, the second end of the inductor L2 is connected to the power output terminal VOUT, and the second end of the inductor L2 is connected to the anode of the feedback diode D1.

[0145] The feedback pin is selectively connected to the anode of one of the voltage stabilizing diodes, and the cathode of any voltage stabilizing diode is connected to the cathode of the feedback diode D1. That is, the feedback pin selects one of the voltage stabilizing diodes to be connected between the feedback pin and the feedback diode D1, as shown in Figure 13 .

[0146] Alternatively, the feedback pin is connected to the anode of any voltage stabilizing diode, and the cathode of the feedback diode D1 is selectively connected to the cathode of one of the voltage stabilizing diodes. That is, the cathode of the feedback diode D1 selects one of the voltage stabilizing diodes to be connected between the feedback pin and the feedback diode D1, as shown in Figure 14 .

[0147] Therefore, through the feedback pin of the BUCK power chip IC1 or the feedback diode D1, one of the voltage stabilizing diodes is selected to be connected in series between the feedback pin and the feedback diode D1.

[0148] In some embodiments of the present application, the first end of the inductor L2 is connected to the first end of the bootstrap capacitor C9, the second end of the bootstrap capacitor C9 is connected to the feedback pin of the IC1. The second end of the inductor L2 is connected to the first end of the capacitor C10, the second end of the capacitor C10 is connected to the anode of the freewheeling diode D3, the cathode of the freewheeling diode D3 is connected to the first end of the inductor L2. The second end of the capacitor C10 is grounded. The two ends of the capacitor C10 are connected in parallel with the resistors R1 and R2.

[0149] When the voltage stabilizing diodes with different voltage stabilizing values are selected, the output voltage of the power supply output terminal VOUT is different.

[0150] Therefore, by selecting the voltage stabilizing diodes with different voltage stabilizing values and connecting them in series between the feedback pin and the feedback diode D1, the voltage output terminal VOUT can output different voltage values to meet the different power supply requirements of different loads.

[0151] The air conditioning equipment of the present embodiment is designed with the voltage stabilizing diode combination and the BUCK power supply chip in the power supply circuit. The feedback pin of the BUCK power supply chip is selectively connected to the anode of one of the voltage stabilizing diodes, and the cathode of any voltage stabilizing diode is connected to the cathode of the feedback diode D1. Alternatively, the feedback pin is connected to the anode of any voltage stabilizing diode, and the cathode of the feedback diode D1 is selectively connected to the cathode of one of the voltage stabilizing diodes. The air conditioning equipment of the present embodiment is designed to select the voltage stabilizing diodes with different voltage stabilizing values and connect them in series between the feedback pin and the feedback diode D1, so that the voltage output terminal VOUT can output different voltage values to meet the different power supply requirements of different loads. The present embodiment is suitable for a variety of loads and has strong versatility, and solves the technical problems of the prior art that the power supply circuit is not suitable for a variety of loads and has poor versatility.

[0152] In some embodiments of the present application, the power supply circuit further comprises a third single-pole multi-throw switch K3, as shown in Figure 13 The third single-pole multi-throw switch K3 comprises a moving contact and a plurality of stationary contacts.

[0153] The moving contact a of the third single-pole multi-throw switch K3 is connected to the feedback pin of the BUCK power supply chip IC1.

[0154] The plurality of stationary contacts of the third single-pole multi-throw switch K3 are connected to the anodes of the plurality of voltage stabilizing diodes one by one; the cathode of any voltage stabilizing diode is connected to the cathode of the feedback diode D1.

[0155] For example, the voltage stabilizing diode combination comprises voltage stabilizing diodes ZD1, ZD2, and ZD3. The third single-pole multi-throw switch K3 comprises a moving contact a and three stationary contacts b1, b2, and b3. The moving contact a is connected to the feedback pin of the BUCK power supply chip IC1.

[0156] The static contact b1 is connected with the anode of the ZD1, the static contact b2 is connected with the anode of the ZD2, the static contact b3 is connected with the anode of the ZD3, and the cathodes of the ZD1, ZD2 and ZD3 are connected with the cathode of the feedback diode D1.

[0157] The moving contact a of the third single-pole multi-throw switch K3 can be selected to be connected with one of the static contacts b1, b2 and b3, so as to select one of the ZD1, ZD2 and ZD3.

[0158] Through the design of the third single-pole multi-throw switch K3, the feedback pin of the BUCK power chip ICl can be conveniently selected to be connected with one of the ZD1, ZD2 and ZD3.

[0159] In some other embodiments of the present application, the power supply circuit further comprises a fourth single-pole multi-throw switch K4, as shown in Figure 14 The fourth single-pole multi-throw switch K4 comprises a moving contact and a plurality of static contacts.

[0160] The moving contact a of the fourth single-pole multi-throw switch K4 is connected with the cathode of the feedback diode D1.

[0161] The plurality of static contacts of the fourth single-pole multi-throw switch K4 are connected with the cathodes of the plurality of ZD1, ZD2 and ZD3 in one-to-one correspondence; and the anodes of the ZD1, ZD2 and ZD3 are connected with the feedback pin.

[0162] For example, the ZD1, ZD2 and ZD3 are included in the ZD group, the fourth single-pole multi-throw switch K4 comprises a moving contact a and three static contacts b1, b2 and b3, and the moving contact a is connected with the cathode of the feedback diode D1.

[0163] The static contact b1 is connected with the cathode of the ZD1, the static contact b2 is connected with the cathode of the ZD2, the static contact b3 is connected with the cathode of the ZD3, and the anodes of the ZD1, ZD2 and ZD3 are connected with the feedback pin of the BUCK power chip ICl.

[0164] The moving contact a of the fourth single-pole multi-throw switch K4 can be selected to be connected with one of the static contacts b1, b2 and b3, so as to select one of the ZD1, ZD2 and ZD3.

[0165] Through the design of the fourth single-pole multi-throw switch K4, the feedback diode D1 can be conveniently selected to be connected with one of the ZD1, ZD2 and ZD3.

[0166] In some other embodiments of the present application, the power supply circuit further comprises a plurality of switching elements, and the plurality of switching elements are in one-to-one correspondence with the plurality of ZD1, ZD2 and ZD3.

[0167] Any one of the switching elements is connected in series in a connection line of the corresponding zener diode and the feedback pin, or in a connection line of the corresponding zener diode and the feedback diode.

[0168] For example, the zener diode combination includes zener diodes ZD1, ZD2, ZD3.

[0169] For example, as shown in Figure 15 The switching element K21 is connected in series in a connection line of the zener diode ZD1 and the feedback pin, the switching element K22 is connected in series in a connection line of the zener diode ZD2 and the feedback pin, and the switching element K23 is connected in series in a connection line of the zener diode ZD3 and the feedback pin.

[0170] For example, as shown in Figure 16 The switching element K21 is connected in series in a connection line of the zener diode ZD1 and the feedback diode D1, the switching element K22 is connected in series in a connection line of the zener diode ZD2 and the feedback diode D1, and the switching element K23 is connected in series in a connection line of the zener diode ZD3 and the feedback diode D1.

[0171] By designing multiple switching elements, the on-off of the line in which each zener diode is connected can be conveniently controlled, so that the required zener diode can be conveniently selected.

[0172] In some embodiments of the application, the switching element is a triode or a MOS tube.

[0173] The triode or the MOS tube is convenient to control the on-off and has stable performance.

[0174] The triode or the MOS tube can be controlled by an air conditioner controller.

[0175] In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0176] The above is only a specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. Air conditioning apparatus comprising a power supply circuit, characterized in that, The power supply circuit comprises: a power input end; a power output end; a zero-ohm resistor; a combination of voltage stabilizing diodes comprising several voltage stabilizing diodes; a BUCK power supply chip, the input pin of which is connected to the power input end; the output pin of which is connected to the first end of an inductor, the second end of the inductor is connected to the anode of a feedback diode; the feedback pin of the BUCK power supply chip is selectively connected to the first end of the zero-ohm resistor or the anode of any one of the voltage stabilizing diodes, the second end of the zero-ohm resistor and the cathode of any one of the voltage stabilizing diodes are connected to the cathode of the feedback diode; alternatively, the feedback pin of the BUCK power supply chip is connected to the first end of the zero-ohm resistor and the anode of any one of the voltage stabilizing diodes, the cathode of the feedback diode is selectively connected to the second end of the zero-ohm resistor or the cathode of any one of the voltage stabilizing diodes.

2. The air conditioning device according to claim 1, wherein: the power supply circuit further comprises: a first single-pole multi-throw switch, which comprises: a moving contact connected to the feedback pin; a plurality of static contacts, each of which is connected to the first end of the zero-ohm resistor or the anode of any one of the voltage stabilizing diodes; the second end of the zero-ohm resistor and the cathode of any one of the voltage stabilizing diodes are connected to the cathode of the feedback diode.

3. The air conditioning device according to claim 1, wherein: the power supply circuit further comprises: a second single-pole multi-throw switch, which comprises: a moving contact connected to the cathode of the feedback diode; a plurality of static contacts, each of which is connected to the second end of the zero-ohm resistor or the cathode of any one of the voltage stabilizing diodes; the first end of the zero-ohm resistor and the anode of any one of the voltage stabilizing diodes are connected to the feedback pin.

4. The air conditioning device according to claim 1, wherein: the power supply circuit further comprises a plurality of switching elements, each of which is connected to the zero-ohm resistor or any one of the voltage stabilizing diodes; one of the switching elements is connected in series in the connection line between the zero-ohm resistor and the feedback pin, or in the connection line between the zero-ohm resistor and the feedback diode; the remaining switching elements are each connected in series in the connection line between the corresponding voltage stabilizing diode and the feedback pin, or in the connection line between the corresponding voltage stabilizing diode and the feedback diode.

5. The air conditioning apparatus according to claim 4, characterized by: The switching elements are triodes or MOS tubes.

6. Air conditioning apparatus comprising a power supply circuit, characterized by The power supply circuit comprises: a power input end; a power output end; a combination of voltage stabilizing diodes comprising a plurality of voltage stabilizing diodes with different voltage values; a BUCK power supply chip, the input pin of which is connected to the power input end; the output pin of which is connected to the first end of an inductor, the second end of the inductor is connected to the anode of a feedback diode; the feedback pin of the BUCK power supply chip is selectively connected to the anode of any one of the voltage stabilizing diodes, the cathode of any one of the voltage stabilizing diodes is connected to the cathode of the feedback diode; Or, the feedback pin of the BUCK power chip is connected with the anode of any one of the voltage stabilizing diodes, and the cathode of the feedback diode is selectively connected with the cathode of one of the voltage stabilizing diodes.

7. The air conditioning device of claim 6, wherein: The power supply circuit further comprises: The third single-pole multi-throw switch comprises: The moving contact is connected with the feedback pin; The plurality of static contacts are connected with the anodes of the plurality of voltage stabilizing diodes one by one; and the cathode of any one of the voltage stabilizing diodes is connected with the cathode of the feedback diode.

8. The air conditioning device of claim 6, wherein: The power supply circuit further comprises: The fourth single-pole multi-throw switch comprises: The moving contact is connected with the cathode of the feedback diode; The plurality of static contacts are connected with the cathodes of the plurality of voltage stabilizing diodes one by one; and the anode of any one of the voltage stabilizing diodes is connected with the feedback pin.

9. The air conditioning device of claim 6, wherein: The power supply circuit further comprises a plurality of switching elements; and the plurality of switching elements correspond to the plurality of voltage stabilizing diodes one by one; Any one of the switching elements is connected in series in the connection line between the corresponding voltage stabilizing diode and the feedback pin, or in the connection line between the corresponding voltage stabilizing diode and the feedback diode.

10. The air conditioning apparatus according to claim 9, characterized by: The switching element is a triode or a MOS tube.

Images