Outdoor unit control device and air conditioner

Abstract

The present invention provides an outdoor unit control device and an air conditioner. The device comprises: a control module, which controls the outdoor unit to turn on or off the power supply of the outdoor unit through the indoor unit, and the control module is connected to the outdoor unit communication circuit, and the outdoor unit communication circuit is turned on when the outdoor unit is turned on; a voltage detection module, which detects the voltage passed into the outdoor unit communication circuit and adjusts the impedance in the outdoor unit communication circuit according to the voltage. The outdoor unit can be awakened and put into standby mode, and the voltage passed into the outdoor unit communication circuit can be detected to protect the communication circuit.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an outdoor unit control device and an air conditioner. Background Art

[0002] At present, the outdoor unit wake-up power used by the air conditioner outdoor unit in standby mode uses the communication circuit to directly lead the AC power from the indoor unit to the outdoor unit. In this way, the components used in the communication circuit are subjected to greater electrical stress. In order to ensure reliability, it is necessary to increase the power, increase the electrical safety distance, and improve redundancy. However, this will bring a series of problems. First, the communication circuit architecture is complex, and it is easy to have problems with line mismatch and mixing; second, the withstand voltage / power specifications of the components used in the communication circuit must be improved simultaneously, resulting in increased costs; third, the electrical safety requirements will also be increased, which increases the difficulty of layout and safety hazards. Summary of the invention

[0003] The main purpose of the present invention is to provide an outdoor unit control device and an air conditioner, which are used to at least partially solve the above technical problems.

[0004] To solve the above problems, the present invention provides an outdoor unit control device on one hand, which includes: a control module, which controls the connection or disconnection of the power supply of the outdoor unit through the indoor unit, and the control module is connected to the outdoor unit communication circuit, and the outdoor unit communication circuit is connected when the outdoor unit is turned on; a voltage detection module, which detects the voltage passed into the outdoor unit communication circuit and adjusts the impedance in the outdoor unit communication circuit according to the voltage.

[0005] Thus, by using the control module to wake up and put the outdoor unit into standby mode, the communication circuit of the outdoor unit is connected while the outdoor unit is woken up. The wake-up and standby mode do not involve the modification of the communication circuit of the outdoor unit, which reduces the complexity of the communication circuit architecture, the problem of circuit damage caused by mismatching and mixing, and avoids the difficulty of layout. In addition, the voltage passed into the communication circuit of the outdoor unit is detected, and the impedance of the communication circuit of the outdoor unit is changed according to the voltage, thereby protecting the communication circuit.

[0006] Optionally, the voltage detection module includes: a first resistance unit and a second resistance unit, the resistance value of the second resistance unit is greater than the resistance value of the first resistance unit; and a detection control circuit, in which a switch is arranged, and when the voltage passed into the outdoor unit communication circuit is less than a preset threshold value, the switch is turned on, and the outdoor unit communication circuit is connected to the first resistance unit; when the voltage passed into the outdoor unit communication circuit is greater than or equal to the preset threshold value, the switch is turned off, and the outdoor unit communication circuit is connected to the second resistance unit.

[0007] Therefore, changing the resistance value of the outdoor unit communication circuit by setting the switch is easy to implement and has low cost.

[0008] Optionally, the detection control circuit includes a voltage division and stabilization circuit and a first control unit, the voltage division and stabilization circuit stabilizes and divides the voltage passed into the outdoor unit communication circuit, and the first control unit turns on or off the switch according to the stabilized and divided voltage.

[0009] In this way, the voltage passed into the outdoor unit communication circuit is stabilized and divided, so as to prevent the outdoor unit communication circuit from being impacted by a large voltage, thereby improving safety.

[0010] Optionally, the voltage-dividing and voltage-stabilizing circuit includes a voltage-dividing diode DZ1 connected in parallel with the outdoor unit communication circuit, and a first voltage-dividing resistor R5 and a second voltage-dividing resistor R6 connected in series and in parallel with the voltage-dividing diode DZ1; both ends of the second voltage-dividing resistor R6 are connected to a first control unit, and the first control unit turns on or off the switch according to the voltage across the resistor R6.

[0011] In this way, judging the size of the input voltage through the voltage-dividing resistor is easy to implement and has low cost.

[0012] Optionally, the first control unit is a three-terminal voltage regulator IC1, a comparator or a transistor, with two ends connected to the two ends of the resistor R6 and the other end connected to the switch. The first control unit controls the on and off of the switch according to the size of the voltage across the resistor R6 and a preset voltage division threshold.

[0013] Optionally, the second resistance unit includes a first adjustment resistor R2 and a second adjustment resistor R3 connected in series, the switch is connected in parallel across the second adjustment resistor R3, and the first resistance unit includes a first adjustment resistor R2.

[0014] In this way, through the connection relationship between the switch and the two adjustment resistors, by utilizing the short circuit at the second adjustment resistor R3 when the switch is connected, the resistance value of the outdoor unit communication circuit can be changed more simply, and the circuit can be simple, easy to implement, and cost-saving.

[0015] Optionally, the switch is a field effect transistor MOS1, a triode, or a relay.

[0016] Therefore, using pure hardware circuit to control the switch is more accurate and faster.

[0017] Optionally, the control module includes: a first connection switch arranged on the indoor unit, and a second connection switch arranged on the outdoor unit; one end of the first connection switch is connected to the live wire of the AC input terminal, and the other end is connected to the second connection switch and the outdoor unit communication circuit.

[0018] In this way, the outdoor unit can be easily awakened and put into standby mode by opening and closing the two switches, and the awakening is not performed through the outdoor unit communication circuit, which simplifies the circuit and reduces the cost.

[0019] Optionally, the control module includes: a first terminal JMP1 and a second terminal JMP2 connecting the indoor unit communication circuit to the outdoor unit, and turning on the power of the outdoor unit by turning on the indoor unit communication circuit, wherein the indoor unit communication circuit is connected to the outdoor unit communication circuit, and the outdoor unit communication circuit is turned on at the same time as the outdoor unit is turned on.

[0020] In this way, low power consumption application can be achieved when the indoor unit is powered.

[0021] Another aspect of the present invention provides an air conditioner, comprising the outdoor unit control device described above.

[0022] The air conditioner has the same advantages as the above-mentioned outdoor unit control device, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The circuit principle diagram of the outdoor unit control device provided in the first embodiment of the present invention is schematically shown;

[0024] Figure 2 A block diagram of an outdoor unit control device provided in Embodiment 2 of the present invention is schematically shown;

[0025] Figure 3 A block diagram of an outdoor unit control device when multiple indoor units are used is schematically shown in the third embodiment of the present invention.

[0026] Reference numerals:

[0027] 1-control module, 2-outdoor unit communication circuit, 3-voltage detection module, 31a-first resistance unit, 31b-second resistance unit, 32-detection control circuit, 32a-switch, 32b-voltage division and voltage stabilization circuit, 32c-first control unit, 4-indoor unit communication circuit. DETAILED DESCRIPTION

[0028] In order to make the application purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0029] Embodiment 1

[0030] An embodiment of the present invention provides an outdoor unit control device.

[0031] Figure 1 The circuit principle diagram of the outdoor unit control device provided by the embodiment of the invention is schematically shown.

[0032] See also Figure 1 In this embodiment, an air conditioner including an outdoor unit and an indoor unit is taken as an example. The device includes: a control module 1, which controls the outdoor unit to be turned on or off through the indoor unit, and the control module 1 is connected to the outdoor unit communication circuit 2, and the outdoor unit communication circuit 2 is turned on when the outdoor unit is turned on; a voltage detection module 3, which detects the voltage passed into the outdoor unit communication circuit 2, and adjusts the impedance in the outdoor unit communication circuit 2 according to the voltage.

[0033] In a feasible manner of this embodiment, the control module 1 includes: a first connection switch K1R provided on the indoor unit, and a second connection switch K2R provided on the outdoor unit; one end of the first connection switch K1R is connected to the live wire of the AC input terminal, and the other end is connected to the second connection switch K2R and the outdoor unit communication circuit 2. Specifically, the first connection switch K1R is controlled by the indoor unit controller, and the second connection switch K2R is controlled by the outdoor unit controller. When the indoor unit is powered on, the indoor unit controller controls the first connection switch K1R to be disconnected or the outdoor unit controller controls the second connection switch K2R to be disconnected, and the outdoor unit is not powered on because it is not connected to the live wire AC-L of the AC input terminal. After the indoor unit is powered on, the indoor unit controller controls the first connection switch K1R to connect the live wire AC-L of the AC input terminal to the outdoor unit through the diode D2, the diode D3, the thermistor PTC1, and the second connection switch K2R, thereby waking up the outdoor unit. While waking up the outdoor unit, the outdoor unit communication circuit 2 is also connected to AC-L through the diode D2 and the diode D4.

[0034] The first connection switch K1R and the second connection switch K2R may be relays or high-power triodes, thyristors, insulated gate bipolar transistors (IGBTs), metal-oxide-semiconductor field effect transistors (MOS transistors), and the like.

[0035] In a feasible manner of the present embodiment, the voltage detection module 3 includes: a first resistance unit 31a and a second resistance unit 31b, wherein the resistance value of the second resistance unit 31b is greater than the resistance value of the first resistance unit 31a; and a detection control circuit 32, in which a switch 32a is arranged. When the voltage passed into the outdoor unit communication circuit 2 is less than a preset threshold value, the switch 32a is turned on, and the outdoor unit communication circuit 2 is connected to the first resistance unit 31a. When the voltage passed into the outdoor unit communication circuit 2 is greater than or equal to the preset threshold value, the switch 32a is turned off, and the outdoor unit communication circuit 2 is connected to the second resistance unit 31b.

[0036] Specifically, the detection control circuit 32 includes a voltage-dividing and voltage-stabilizing circuit 32b and a first control unit 32c, wherein the voltage-dividing and voltage-stabilizing circuit 32b stabilizes and divides the voltage passed into the outdoor unit communication circuit 2, and the first control unit 32c turns on or off the switch 32a according to the voltage after stabilization and voltage division. The voltage-dividing and voltage-stabilizing circuit 32b includes a voltage-stabilizing tube DZ1 connected in parallel with the outdoor unit communication circuit 2, and a first voltage-dividing resistor R5 and a second voltage-dividing resistor R6 connected in series in parallel with the voltage-stabilizing tube DZ1; so that the voltage borne on the series circuit of the first voltage-dividing resistor R5 and the second voltage-dividing resistor R6 is the same as the voltage of the voltage-stabilizing tube DZ1, and the two ends of the second voltage-dividing resistor R6 are connected to the first control unit 32c, and the first control unit 32c turns on or off the switch 32a according to the voltage across the resistor R6.

[0037] The first control unit 32c is a three-terminal voltage regulator IC1, a comparator or a triode, with two ends connected to the two ends of the resistor R6 and the other end connected to the switch 32a. The first control unit 32c controls the on and off of the switch 32a according to the voltage across the resistor R6 and the preset voltage dividing threshold. The second resistor unit 31b includes a first adjustment resistor R2 and a second adjustment resistor R3 connected in series. The switch 32a is connected in parallel to the two ends of the second adjustment resistor R3, and the first resistor unit 31a is the first adjustment resistor R2. When the switch 32a is disconnected, the outdoor unit communication circuit 2 is connected to the second resistor unit 31b, and when the switch 32a is connected, the outdoor unit communication circuit 2 is connected to the first resistor unit 31a. By adjusting the parameters of the voltage regulator DZ1, the first voltage dividing resistor R5 and the second voltage dividing resistor R6, the impedance matching relationship connected to the outdoor unit communication circuit 2 can be flexibly controlled. For example, under rated conditions, the communication voltage of the outdoor unit communication circuit 2 is 54V, and the DZ1 voltage regulator is set to 72V (or other voltage regulator values ​​greater than 54V). When the voltage connected to the outdoor unit communication circuit 2 is 220V, the comparison circuit determines that the voltage on the second voltage-dividing resistor R6 is greater than a preset voltage-dividing threshold value (for example, 2.5V). At this time, the switch 32a will not be turned on, and the resistance value of the outdoor unit communication circuit 2 will be R2+R3; when the voltage connected to the outdoor unit communication circuit 2 is 54V, the comparison circuit determines that the voltage on the second voltage-dividing resistor R6 is less than a preset voltage-dividing threshold value (for example, 2.5V). At this time, the switch 32a is turned on, and the resistance value of the outdoor unit communication circuit 2 will be R2. By introducing the R3 resistor to the outdoor unit communication circuit 2, the impedance in the outdoor unit communication circuit 2 is adjusted, so that the voltage on R2 is greatly reduced, and the current in the outdoor unit communication circuit 2 is greatly reduced, thereby protecting the outdoor unit communication circuit 2.

[0038] Among them, the first control unit 32c is a three-terminal voltage regulator IC1, a comparator or a triode. In this embodiment, the three-terminal voltage regulator IC1 is taken as an example. Two ends of the three-terminal voltage regulator IC1 are connected to the second voltage-dividing resistor R6, and the other end is connected to the switch 32a. When the voltage across the second voltage-dividing resistor R6 is less than the preset threshold value of the three-terminal voltage regulator IC1, the three-terminal voltage regulator IC1 is in the on state, and the switch 32a is connected, so that the second adjustment resistor R3 connected in parallel with the switch 32a is short-circuited, and the resistance value of the outdoor unit communication circuit 2 will be R2. When the voltage across the second voltage-dividing resistor R6 is greater than the preset threshold value of the three-terminal voltage regulator IC1, the three-terminal voltage regulator IC1 is broken down, and the three-terminal voltage regulator IC1 is not conducting, so that the switch 32a is also in the off state, and the resistance value of the outdoor unit communication circuit 2 will be R2+R3.

[0039] The switch 32a mentioned above can be a field effect transistor MOS1, a triode, or a relay, which is not specifically limited in this embodiment.

[0040] Embodiment 2

[0041] This embodiment provides an outdoor unit control device. This embodiment is different from the first embodiment in that the control module 1 in this embodiment includes: a first wiring terminal JMP1 and a second wiring terminal JMP2 for connecting the indoor unit communication circuit 4 to the outdoor unit, and the power supply of the outdoor unit is turned on by turning on the indoor unit communication circuit 4, wherein the indoor unit communication circuit 4 is connected to the outdoor unit communication circuit 2, and the outdoor unit communication circuit 2 is turned on when the outdoor unit is turned on.

[0042] See also Figure 2 In this embodiment, a connection plug or connection terminal JMP1 and JMP2 can be provided. The connection terminals JMP1 and JMP2 are directly connected to the external line OUTDR, the external line OUTDR is connected to the indoor unit communication circuit 4, and the second connection terminal JMP2 is connected to the outdoor unit.

[0043] This embodiment can realize that the outdoor unit can be powered at the same time as the indoor unit is powered, thereby realizing low power consumption application when the indoor unit is powered.

[0044] Embodiment 3

[0045] See also Figure 3 This embodiment provides an outdoor unit control device. The difference between this embodiment and the first embodiment is that in this embodiment, at least two indoor units are connected to the outdoor unit.

[0046] For example, the control module 1 can set a first switch K1R and a third switch K1R-1 on the indoor unit A and the indoor unit B, respectively. The first switch K1R and the third switch K1R-1 are both connected to the second switch K2R of the outdoor unit. When the indoor unit A is used, the outdoor unit can be awakened by the first switch K1R in the indoor unit A, and when the indoor unit B is used, the outdoor unit can be awakened by the third switch K1R-1 in the indoor unit B. This satisfies the use of one-to-many air conditioners.

[0047] Embodiment 4

[0048] This embodiment provides an air conditioner, which includes the outdoor unit control device mentioned above.

[0049] This air conditioner has the same technical features as the outdoor unit control device in the above embodiment, and has the same advantages as the outdoor unit control device in the above embodiment, which will not be repeated here.

[0050] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. An outdoor unit control device, characterized in that: The device comprises: A control module (1) is used to control the outdoor unit to turn on or off the power supply of the outdoor unit through the indoor unit, wherein the control module (1) is connected to the outdoor unit communication circuit (2), and the outdoor unit communication circuit (2) is turned on when the outdoor unit is turned on; The voltage detection module (3) detects the voltage passed into the outdoor unit communication circuit (2), and adjusts the impedance in the outdoor unit communication circuit (2) according to the voltage. Wherein, the voltage detection module (3) comprises: a first resistance unit (31a) and a second resistance unit (31b), wherein the resistance value of the second resistance unit (31b) is greater than the resistance value of the first resistance unit (31a); and A detection control circuit (32), wherein a switch (32a) is provided in the detection control circuit (32); when the voltage passed into the outdoor unit communication circuit (2) is less than a preset threshold value, the switch (32a) is turned on, and the outdoor unit communication circuit (2) is connected to the first resistance unit (31a); when the voltage passed into the outdoor unit communication circuit (2) is greater than or equal to the preset threshold value, the switch (32a) is turned off, and the outdoor unit communication circuit (2) is connected to the second resistance unit (31b); The control module (1) comprises: A first connection switch K1R provided on the indoor unit, and a second connection switch K2R provided on the outdoor unit; one end of the first connection switch K1R is connected to the live wire of the AC input terminal, and the other end is connected to the second connection switch K2R and the outdoor unit communication circuit (2); and The first connection terminal JMP1 and the second connection terminal JMP2 connecting the indoor unit communication circuit (4) to the outdoor unit are used to connect the power supply of the outdoor unit by connecting the indoor unit communication circuit (4), wherein the indoor unit communication circuit (4) is connected to the outdoor unit communication circuit (2), and the outdoor unit communication circuit (2) is connected when the outdoor unit is connected.

2. The device according to claim 1, characterized in that The detection control circuit (32) comprises a voltage division and stabilization circuit (32b) and a first control unit (32c), wherein the voltage division and stabilization circuit (32b) stabilizes and divides the voltage passed into the outdoor unit communication circuit (2), and the first control unit (32c) switches the switch (32a) on or off according to the stabilized and divided voltage.

3. The device according to claim 2, characterized in that The voltage-dividing and voltage-stabilizing circuit (32b) comprises a voltage-dividing tube DZ1 connected in parallel with the outdoor unit communication circuit (2), and a first voltage-dividing resistor R5 and a second voltage-dividing resistor R6 connected in series and in parallel with the voltage-dividing tube DZ1; both ends of the second voltage-dividing resistor R6 are connected to a first control unit (32c), and the first control unit (32c) turns on or off the switch (32a) according to the voltage across both ends of the resistor R6.

4. The device according to claim 3, characterized in that The first control unit (32c) is a three-terminal voltage regulator IC1, a comparator or a triode, the two ends of which are connected to the two ends of the resistor R6 and the other end of which is connected to the switch (32a). The first control unit (32c) controls the on and off of the switch (32a) according to the magnitude of the voltage across the resistor R6 and a preset voltage division threshold.

5. The device according to claim 4, characterized in that The second resistance unit (31b) comprises a first adjustment resistor R2 and a second adjustment resistor R3 connected in series, the switch (32a) is connected in parallel at both ends of the second adjustment resistor R3, and the first resistance unit (31a) comprises a first adjustment resistor R2.

6. The device according to any one of claims 1 to 5, characterized in that: The switch (32a) is a field effect transistor MOS1, a triode, or a relay.

7. An air conditioner, characterized in that: The air conditioner comprises the outdoor unit control device as described in any one of claims 1-6.

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