Air conditioner

Abstract

The utility model provides an air conditioner which comprises a first control switch which comprises a switch part and a coil part. A fuse; a controller; the electric heating device comprises an electric heating body; a first temperature control switch; a second temperature control switch; the controller comprises a first temperature control switch detection circuit used for detecting the open state or the closed state of the first temperature control switch. The controller comprises a second temperature control switch detection circuit used for detecting the open state or the closed state of the second temperature control switch. The controller comprises a first control switch control port for controlling the power-on and power-off of the coil part; the switch part, the fuse and the electric heating body are connected in series; the coil part is connected between the negative electrode of the power supply and the control port of the first control switch; one end of the first temperature control switch is connected with the first temperature control switch detection circuit; one end of the second temperature control switch is connected with the second temperature control switch detection circuit; and damage to the first control switch and the electric heating body caused by repeated closing and opening of the first control switch controlled by the controller is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to an air conditioner. Background Art

[0002] The air conditioner includes a casing, which is provided with a heat exchange inlet and a heat exchange outlet. A heat exchange air duct is provided in the casing, and an indoor heat exchanger and a heat exchange fan are provided in the heat exchange air duct. Driven by the heat exchange fan, air enters the heat exchange air duct from the heat exchange inlet, and the air entering the heat exchange air duct exchanges heat with the indoor heat exchanger, and the air after heat exchange flows out from the heat exchange air outlet.

[0003] The air conditioner may further include an electric heating device, which is used to generate heat and to exchange heat with the air in the heat exchange air duct, so that the air temperature is increased.

[0004] However, when the air outlet of the air conditioner is blocked or blocked, the heat generated by the electric heating device is difficult to be taken out by the outflowing air in time, which will increase the temperature of the outflowing air, making the temperature felt by the user too high, which seriously affects the safety of the user and seriously affects the user experience; or, when the heat exchange fan is not working, the heat generated by the electric heating device cannot be taken out by the outflowing air, making the temperature at the electric heating device too high; the existing method is to control the start and stop of the electric heating device by setting a first control switch and controlling the opening and closing of the first control switch to control the outlet temperature and the temperature at the electric heating device, but when the air outlet is blocked or the problem of the heat exchange fan is not effectively solved, the first control switch will be repeatedly started and stopped, eventually causing the electric heating device to fail or the first control switch to fail. Therefore, the present application proposes an air conditioner. Summary of the invention

[0005] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0006] To this end, according to an embodiment of the present disclosure, an air conditioner is provided, comprising:

[0007] A casing, wherein a heat exchange air inlet and a heat exchange air outlet are formed on the casing, a heat exchange air duct is formed in the casing, and the heat exchange air inlet and the heat exchange air outlet are connected to the heat exchange air duct;

[0008] An indoor heat exchanger, disposed in the heat exchange air duct and used for exchanging heat with the air in the heat exchange air duct;

[0009] An electric heating device, disposed in the heat exchange air duct and used for exchanging heat with the air in the heat exchange air duct;

[0010] A heat exchange fan is arranged in the heat exchange air duct;

[0011] a first control switch, the first control switch comprising a switch portion and a coil portion;

[0012] Fuse;

[0013] A controller, used for controlling the operation of the air conditioner;

[0014] The electric heating device comprises:

[0015] Electric heating element;

[0016] First temperature control switch;

[0017] A second temperature-controlled switch, wherein the second temperature-controlled switch and the first temperature-controlled switch are arranged at two opposite ends of the electric heating device, and the second temperature-controlled switch and the first temperature-controlled switch are arranged on both sides of the length direction of the electric heating body;

[0018] The controller comprises a first temperature-controlled switch detection circuit for detecting an open state or a closed state of the first temperature-controlled switch; the controller comprises a second temperature-controlled switch detection circuit for detecting an open state or a closed state of the second temperature-controlled switch; the controller comprises a first control switch control port for controlling the power on and power off of the coil portion;

[0019] The switch part, the fuse and the electric heating body are connected in series; the coil part is connected between the negative pole of the power supply and the control port of the first control switch; one end of the first temperature control switch is connected to the first temperature control switch detection circuit; one end of the second temperature control switch is connected to the second temperature control switch detection circuit.

[0020] The coil portion of the first control switch is connected to the first control switch control port of the controller, so that the controller can control the opening and closing of the first control switch, and can power on and off the electric heating body to ensure the normal operation of the electric heating body; the electric heating device is provided to include a first temperature-controlled switch and a second temperature-controlled switch, and the first temperature-controlled switch is connected to the first temperature-controlled switch detection circuit and the second temperature-controlled switch is connected to the second temperature-controlled switch detection circuit, so that the controller can detect the closing and opening of the first temperature-controlled switch and the second temperature-controlled switch, and the controller determines whether the air conditioner is shut down according to the state of the first temperature-controlled switch to avoid damage to the first control switch and the electric heating body caused by the repeated closing and opening of the first control switch controlled by the controller; the controller can judge whether the electric heating device is operating normally according to the state of the second temperature-controlled switch, and when the heat exchange fan fails and it is difficult to detect the outlet air temperature, it can be judged more conveniently through the state of the second temperature-controlled switch.

[0021] According to an embodiment of the present disclosure, the first temperature-controlled switch is connected in series with the coil part, the first temperature-controlled switch is connected between the coil part and the control port of the first control switch, and the side of the first temperature-controlled switch close to the coil part is connected to the first temperature-controlled switch detection circuit. When the temperature near the electric heating device is too high, the first temperature-controlled switch will be disconnected. After the first temperature-controlled switch is disconnected, the controller cannot energize the coil part, and the electric heating device cannot work. When the temperature near the electric heating device is too high and the controller still sends a signal to control the coil part to be energized, the coil part cannot be energized, thereby protecting the electric heating device and the first control switch.

[0022] According to an embodiment of the present disclosure, the first temperature-controlled switch is connected between the first temperature-controlled switch detection circuit and the negative pole of the power supply, so as to ensure that the controller can detect the opening and closing of the first temperature-controlled switch.

[0023] According to an embodiment of the present disclosure, it also includes:

[0024] An air outlet temperature sensor connected to the housing and used to detect the air outlet temperature of the heat exchange air outlet;

[0025] The controller comprises a temperature detection port, and the temperature detection port is connected to the air outlet temperature sensor to obtain the air outlet temperature at the heat exchange air outlet.

[0026] An outlet air temperature sensor is provided to detect the outlet air temperature, so as to identify air conditioner failures according to the outlet air temperature. The air conditioner can be shut down in time when the heat exchange outlet is blocked, thereby ensuring the safety of the electric heating device.

[0027] According to an embodiment of the present disclosure, the first temperature-controlled switch detection circuit includes a photocoupler, and the photocoupler includes a light-emitting diode and a phototransistor. When the first temperature-controlled switch is connected in series with the coil portion, a side of the first temperature-controlled switch close to the coil portion is connected to the positive electrode of the light-emitting diode. The photocoupler is provided to ensure detection of the state of the first temperature-controlled switch.

[0028] According to an embodiment of the present disclosure, the controller includes a discharge diode, which is connected in parallel with the coil part, one end of the discharge diode is connected between the first temperature-controlled switch and the coil part, and the other end of the discharge diode is connected to the negative electrode of the power supply. The discharge diode is provided to discharge the electromotive force to avoid damage to other weak-current components.

[0029] According to an embodiment of the present disclosure, the controller includes a first temperature-controlled switch detection port and a second temperature-controlled switch detection port, one end of the first temperature-controlled switch is connected to the first temperature-controlled switch detection circuit through the first temperature-controlled switch detection port, and one end of the second temperature-controlled switch is connected to the second temperature-controlled switch detection circuit through the second temperature-controlled switch detection port, so as to facilitate the connection between the controller and the first temperature-controlled switch and the second temperature-controlled switch.

[0030] According to an embodiment of the present disclosure, there are at least two electric heating bodies connected in parallel, there are at least two first temperature-controlled switches connected in series, and the number of the first temperature-controlled switches is the same as the number of the electric heating bodies.

[0031] According to an embodiment of the present disclosure, there are at least two second temperature-controlled switches, the second temperature-controlled switches are connected in parallel, and the number of the second temperature-controlled switches is the same as the number of the electric heating bodies.

[0032] According to an embodiment of the present disclosure, the electric heating device also includes a first supporting part and a second supporting part that are arranged opposite to each other, and the two ends of the electric heating body in the length direction are respectively connected to the first supporting part and the second supporting part, the first temperature control switch is arranged on the first supporting part, and the second temperature control switch is arranged on the second supporting part, and the fuse is arranged on the first supporting part, and the fuse is located between the first control switch and the electric heating body, so as to reasonably utilize the structure of the electric heating device and facilitate the connection with the controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a partial structural connection diagram of an air conditioner according to an embodiment of the present application;

[0035] Figure 2 is another partial structural connection diagram of the air conditioner according to the embodiment of the present application;

[0036] Figure 3 is a structural diagram of an electric heating device according to an embodiment of the present application;

[0037] Figure 4 is another partial structural connection diagram of the air conditioner according to the embodiment of the present application;

[0038] Figure 5is a connection diagram between a first temperature-controlled switch detection circuit and a first temperature-controlled switch according to an embodiment of the present application;

[0039] Figure 6 It is a connection structure diagram of the discharge diode according to the embodiment of the present application.

[0040] In the above figures: electric heating device 2; electric heating body 21; first temperature control switch 22; second temperature control switch 23; first support part 241; second support part 242; fuse 25; first control switch 3; switch part 31; coil part 32; air outlet temperature sensor 42; controller 5; first temperature control switch detection circuit 51; photoelectric coupler 511; light emitting diode 5111; phototransistor 5112; first resistor 512; second resistor 513; first control switch control port 521; first temperature control switch detection port 522; second temperature control switch detection port 523; temperature detection port 524; discharge diode 53. DETAILED DESCRIPTION

[0041] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that, without further description, elements, structures and features in one embodiment may also be beneficially combined in other embodiments.

[0042] The present application proposes an air conditioner, which is described below with reference to the accompanying drawings.

[0043] The air conditioner includes a casing.

[0044] The housing is provided with a heat exchange air inlet and a heat exchange air outlet.

[0045] A heat exchange air duct is formed in the housing, the heat exchange air duct is connected to the heat exchange air inlet, and the heat exchange air duct is connected to the heat exchange air outlet.

[0046] The air conditioner may include an indoor heat exchanger, wherein the indoor heat exchanger is arranged in the heat exchange air duct, and is used for exchanging heat with the air in the heat exchange air duct.

[0047] The air conditioner may include a heat exchange fan. The heat exchange fan is arranged in the heat exchange air duct. Driven by the heat exchange fan, air enters the heat exchange air duct from the heat exchange air inlet, the air entering the heat exchange air duct exchanges heat with the indoor heat exchanger, and the heat exchanged air flows out from the heat exchange air outlet.

[0048] The air conditioner may include a compressor.

[0049] The air conditioner may include a throttling device. The throttling device is used for throttling.

[0050] The air conditioner performs the refrigeration cycle of the air conditioner by using a compressor, a condenser, a throttling device and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion and evaporation, and supplies refrigerant to the air that has been conditioned and heat exchanged.

[0051] The compressor compresses the refrigerant gas in a low-temperature and low-pressure state and discharges the refrigerant gas in a high-temperature and high-pressure state.

[0052] The exhausted refrigerant gas flows into the condenser.

[0053] The condenser condenses the compressed refrigerant into liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0054] The throttle device expands the high-temperature and high-pressure liquid-phase refrigerant condensed in the condenser into a low-pressure liquid-phase refrigerant.

[0055] The evaporator evaporates the refrigerant expanded in the throttling device and returns the refrigerant gas in a low temperature and low pressure state to the compressor.

[0056] The evaporator can achieve a refrigeration effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled. In the whole cycle, the air conditioner can adjust the temperature of the indoor space.

[0057] Of the indoor heat exchanger and the outdoor heat exchanger, one is a condenser and the other is an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater in a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler in a cooling mode.

[0058] In some embodiments of the present application, reference Figure 1-Figure 2 The air conditioner comprises an electric heating device 2. The electric heating device 2 is arranged in the heat exchange air duct. The electric heating device 2 is used for exchanging heat with the air in the heat exchange air duct.

[0059] In some embodiments of the present application, reference Figure 1-Figure 2 , the air conditioner includes a first control switch 3.

[0060] The first control switch 3 includes a switch portion 31 and a coil portion 32 .

[0061] The first control switch 3 is a contactor or a relay.

[0062] In some embodiments of the present application, reference Figure 1-Figure 2 The air conditioner comprises a controller 5. The controller 5 is used for controlling the operation of the air conditioner.

[0063] In some embodiments of the present application, reference Figure 1-Figure 3 The electric heating device 2 comprises an electric heating body 21. The electric heating body 21 is used to generate heat.

[0064] refer to Figure 1-Figure 3 , the electric heating device includes a fuse 25.

[0065] refer to Figure 1-Figure 3 The electric heating device 2 includes a first temperature control switch 22 and a second temperature control switch 23 .

[0066] The second temperature control switch 22 and the first temperature control switch 21 are arranged at two opposite ends of the electric heating device. The second temperature control switch and the first temperature control switch are arranged at two sides of the length direction of the electric heating body.

[0067] In some embodiments of the present application, reference Figure 1-Figure 3 The controller 5 includes a first temperature-controlled switch detection circuit 51 for detecting an open state or a closed state of the first temperature-controlled switch.

[0068] refer to Figure 1-Figure 3 The controller 5 includes a second temperature-controlled switch detection circuit for detecting an open state or a closed state of the second temperature-controlled switch.

[0069] refer to Figure 1-Figure 3 The controller 5 includes a first control switch control port 521 to control the power on and power off of the coil part.

[0070] The switch part, the fuse and the electric heating element are connected in series.

[0071] The coil part is connected between the negative electrode of the power supply and the control port of the first control switch.

[0072] One end of the first temperature-controlled switch is connected to the first temperature-controlled switch detection circuit 51 .

[0073] One end of the second temperature-controlled switch is connected to the second temperature-controlled switch detection circuit.

[0074] The coil portion of the first control switch is connected to the first control switch control port of the controller, so that the controller can control the opening and closing of the first control switch, and can power on and off the electric heating body to ensure the normal operation of the electric heating body; the electric heating device is provided to include a first temperature-controlled switch and a second temperature-controlled switch, and the first temperature-controlled switch is connected to the first temperature-controlled switch detection circuit and the second temperature-controlled switch is connected to the second temperature-controlled switch detection circuit, so that the controller can detect the closing and opening of the first temperature-controlled switch and the second temperature-controlled switch, and the controller determines whether the air conditioner is shut down according to the state of the first temperature-controlled switch to avoid damage to the first control switch and the electric heating body caused by the repeated closing and opening of the first control switch controlled by the controller; the controller can judge whether the electric heating device is operating normally according to the state of the second temperature-controlled switch, and when the heat exchange fan fails and it is difficult to detect the outlet air temperature, it can be judged more conveniently through the state of the second temperature-controlled switch.

[0075] In some embodiments of the present application, the first temperature-controlled switch is a normally closed switch, and the second temperature-controlled switch is a normally open switch.

[0076] The temperature at which the first temperature-controlled switch changes from being closed to being opened is greater than the temperature at which the second temperature-controlled switch changes from being opened to being closed.

[0077] The temperature at which the first temperature-controlled switch is turned from closed to open can be any value between 100° C. and 110° C. The temperature at which the first temperature-controlled switch is turned from closed to open can be selected to be 106° C.

[0078] The temperature at which the second temperature-controlled switch changes from being opened to being closed can be any value between 50° C. and 60° C. Among them, the temperature at which the second temperature-controlled switch changes from being opened to being closed can be selected to be 55° C.

[0079] In some embodiments of the present application, the controller is configured as:

[0080] When the air conditioner is in heating working state, the controller detects that the first temperature control switch changes from closed state to open state, and controls the air conditioner to shut down. Before manual intervention, even if the first temperature control switch changes from open state to closed state, the air conditioner will not start heating.

[0081] Specifically, when the air conditioner is in the heating working state, when the controller detects that the first temperature control switch changes from the closed state to the open state, it means that the temperature near the electric heating device is too high, and the power supply of the electric heating device needs to be cut off immediately. The main reason for this situation is that the heat exchange fan does not rotate, and the heat generated by the electric heating device cannot be exchanged. After the power supply of the electric heating device is cut off, the temperature near the electric heating device will gradually decrease. When the temperature near the electric heating device drops below the temperature at which the first temperature control switch resumes closing, the first temperature control switch will reset. If the first temperature control switch resumes closing temperature, the controller controls the air conditioner to start heating again. After a certain period of time, the first temperature control switch will be disconnected for high temperature protection. This repetition will seriously reduce the life of the electric heating device and the first control switch. Therefore, the present application sets the controller to control the air conditioner to stop when it detects that the first temperature control switch changes from the closed state to the open state. Before manual intervention, even if the first temperature control switch changes from the open state to the closed state, the air conditioner will not start heating, and the electric heating device and the first control switch can be protected.

[0082] In some embodiments of the present application, when the controller detects that the state of the second temperature control switch is an off state, the controller determines that the electric heating device is short-circuited or the first control switch is disconnected.

[0083] When the controller detects that the state of the second temperature control switch is a closed state, the controller determines that the electric heating device is working.

[0084] After the electric heating device is working, the temperature near the electric heating device will rise. By detecting the state of the second temperature control switch of the electric heating device, it can be determined whether the electric heating device is working. If the electric heating device is working, after the temperature near the electric heating device rises to the operating temperature of the second temperature control switch, the second temperature control switch will close, and it can be determined that the electric heating device is working normally. Otherwise, it is determined that the electric heating device is not working. The reason for not working may be that the first control switch cannot be closed or the electric heating device is short-circuited, which can help troubleshooting and locating the fault. Therefore, setting the second temperature control switch can conveniently detect whether the electric heating device is working normally.

[0085] In some embodiments of the present application, reference Figure 1-Figure 3 The first temperature-controlled switch is connected in series with the coil part. The first temperature-controlled switch is connected between the coil part and the control port of the first control switch. The side of the first temperature-controlled switch close to the coil part is connected to the first temperature-controlled switch detection circuit 51. When the temperature near the electric heating device is too high, the first temperature-controlled switch will be disconnected. After the first temperature-controlled switch is disconnected, the controller cannot energize the coil part, and the electric heating device cannot work. When the temperature near the electric heating device is too high and the controller still sends a signal to control the coil part to be energized, the coil part cannot be energized, thereby protecting the electric heating device and the first control switch.

[0086] In some embodiments of the present application, reference Figure 4 The first temperature-controlled switch is connected between the first temperature-controlled switch detection circuit 51 and the negative pole of the power supply to ensure that the controller can detect the opening and closing of the first temperature-controlled switch.

[0087] In some embodiments of the present application, reference Figure 1-Figure 4 The other end of the second temperature control switch is connected to the negative pole of the power supply to ensure that the controller can detect the opening and closing of the second temperature control switch.

[0088] In some embodiments of the present application, reference Figure 1-Figure 4 The air conditioner further includes an air outlet temperature sensor 42. The air outlet temperature sensor 42 is connected to the housing, and the air outlet temperature sensor 42 is used to detect the air outlet temperature of the heat exchange outlet.

[0089] refer to Figure 1-Figure 4 The controller includes a temperature detection port 524, which is connected to an outlet air temperature sensor to obtain the outlet air temperature at the heat exchange outlet.

[0090] An outlet air temperature sensor is provided to detect the outlet air temperature, so as to identify air conditioner failures according to the outlet air temperature. The air conditioner can be shut down in time when the heat exchange outlet is blocked, thereby ensuring the safety of the electric heating device.

[0091] In some embodiments of the present application, the controller is configured as follows: an outlet air temperature sensor detects the outlet air temperature in real time, and when the outlet air temperature reaches a first preset temperature, the air conditioner is controlled to shut down, and before manual intervention, the air conditioner is not allowed to start heating again even if the outlet air temperature has not reached the first preset temperature.

[0092] The first preset temperature may be 65° C. The first preset temperature may be any value between 60° C. and 70° C.

[0093] Specifically, when the air conditioner is working in heating mode and the heat exchange outlet is blocked, the air outlet temperature will gradually rise with time, but ultimately this temperature will not reach the operating temperature of the first temperature control switch of the electric heating device. Therefore, a second temperature control switch is provided so that the controller is protected according to the action of the second temperature control switch, thereby reducing damage to the life of the electric heating device.

[0094] In some embodiments of the present application, reference Figure 5-Figure 6 The first temperature-controlled switch detection circuit includes a photocoupler 511, which includes a light-emitting diode 5111 and a phototransistor 5112. When the first temperature-controlled switch is connected in series with the coil portion, a side of the first temperature-controlled switch close to the coil portion is connected to the positive electrode of the light-emitting diode. The photocoupler is provided to ensure the detection of the state of the first temperature-controlled switch.

[0095] refer to Figure 5-Figure 6 The cathode of the light emitting diode 5111 is connected to the cathode of the power supply through the first resistor 512 .

[0096] refer to Figure 5-Figure 6 The collector of the phototransistor 5112 is connected to the working power supply. The emitter of the phototransistor 5112 outputs a signal.

[0097] refer to Figure 5-Figure 6 The emitter of the phototransistor 5112 is grounded through the second resistor 513 .

[0098] When the first control switch control signal is the power supply voltage, the control signal controls the first control switch to be turned on through the first temperature control switch, and the output of the photoelectric coupler is logic high, indicating that the first temperature control switch is turned on. When the first temperature control switch is turned off, the output of the photoelectric coupler is logic low, so whether the first temperature control switch is turned off can be judged by the output signal of the photoelectric coupler.

[0099] In some embodiments of the present application, reference Figure 5-Figure 6 The controller includes a discharge diode 53. The discharge diode 53 is connected in parallel with the coil part, one end of the discharge diode is connected between the first temperature control switch and the coil part, and the other end of the discharge diode is connected to the negative electrode of the power supply.

[0100] If the first temperature-controlled switch is connected in series with the coil part of the first control switch, the safety of the circuit must be fully considered when detecting the state of the first temperature-controlled switch. After the coil part of the first control switch is powered off, there will be a high reverse electromotive force, which needs to be discharged with a discharge diode to avoid damage to other weak-current devices.

[0101] In some embodiments of the present application, reference Figure 5-Figure 6 , the controller is connected to the positive pole and negative pole of the low voltage power supply.

[0102] In some embodiments of the present application, reference Figure 1-Figure 6 , the electric heating body is connected to the high voltage power supply.

[0103] In some embodiments of the present application, reference Figure 1-Figure 6 The controller includes a first temperature control switch detection port 522 to detect whether the first temperature control switch is opened or closed.

[0104] refer to Figure 1-Figure 6 The controller includes a second temperature control switch detection port 523 to detect whether the second temperature control switch is opened or closed.

[0105] refer to Figure 1-Figure 6 One end of the first temperature control switch is connected to the first temperature control switch detection port. One end of the first temperature control switch is connected to the first temperature control switch detection circuit 51 through the first temperature control switch detection port.

[0106] refer to Figure 1-Figure 6 The second temperature control switch is connected between the negative electrode of the power supply and the second temperature control switch detection port. One end of the second temperature control switch is connected to the second temperature control switch detection circuit through the second temperature control switch detection port.

[0107] The second temperature control switch detection port 523 and the first temperature control switch detection port are provided to facilitate the connection between the controller and the first temperature control switch and the second temperature control switch.

[0108] In some embodiments of the present application, reference Figure 3 The electric heating body has at least two electric heating bodies, which are connected in parallel.

[0109] In some embodiments of the present application, reference Figure 3 There are at least two first temperature-controlled switches, which are connected in series, and the number of the first temperature-controlled switches is the same as the number of the electric heating bodies.

[0110] In some embodiments of the present application, reference Figure 3 There are at least two second temperature-controlled switches, which are connected in parallel, and the number of the second temperature-controlled switches is the same as the number of the electric heating bodies.

[0111] In some embodiments of the present application, reference Figure 3 The electric heating device also includes a first support part 241 and a second support part 242 arranged opposite to each other. The two ends of the electric heating body in the length direction are respectively connected to the first support part and the second support part. The first temperature control switch is arranged on the first support part, and the second temperature control switch is arranged on the second support part. The fuse is arranged on the first support part, and the fuse is located between the first control switch and the electric heating body. The structure of the electric heating device is reasonably utilized to facilitate the connection with the controller.

[0112] In some embodiments of the present application, the air conditioner may be a split-type air conditioner, which includes an indoor part or an outdoor part, and the indoor part is a cabinet-type air conditioner indoor unit or a wall-mounted air conditioner indoor unit or a duct unit.

[0113] In some embodiments of the present application, the air conditioner may be an integrated air conditioner, such as a parking air conditioner.

[0114] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0115] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An air conditioner, characterized in that: include: A casing, wherein a heat exchange air inlet and a heat exchange air outlet are formed on the casing, a heat exchange air duct is formed in the casing, and the heat exchange air inlet and the heat exchange air outlet are connected to the heat exchange air duct; An indoor heat exchanger, disposed in the heat exchange air duct and used for exchanging heat with the air in the heat exchange air duct; An electric heating device, disposed in the heat exchange air duct and used for exchanging heat with the air in the heat exchange air duct; A heat exchange fan is arranged in the heat exchange air duct; a first control switch, the first control switch comprising a switch portion and a coil portion; Fuse; A controller, used for controlling the operation of the air conditioner; The electric heating device comprises: Electric heating element; First temperature control switch; A second temperature-controlled switch, wherein the second temperature-controlled switch and the first temperature-controlled switch are arranged at two opposite ends of the electric heating device, and the second temperature-controlled switch and the first temperature-controlled switch are arranged on both sides of the length direction of the electric heating body; The controller comprises a first temperature-controlled switch detection circuit for detecting an open state or a closed state of the first temperature-controlled switch; the controller comprises a second temperature-controlled switch detection circuit for detecting an open state or a closed state of the second temperature-controlled switch; the controller comprises a first control switch control port for controlling the power on and power off of the coil portion; The switch part, the fuse and the electric heating body are connected in series; the coil part is connected between the negative pole of the power supply and the control port of the first control switch; one end of the first temperature control switch is connected to the first temperature control switch detection circuit; one end of the second temperature control switch is connected to the second temperature control switch detection circuit.

2. The air conditioner according to claim 1, characterized in that: The first temperature-controlled switch is connected in series with the coil part, the first temperature-controlled switch is connected between the coil part and the control port of the first control switch, and a side of the first temperature-controlled switch close to the coil part is connected to the first temperature-controlled switch detection circuit.

3. The air conditioner according to claim 1, characterized in that: The first temperature-controlled switch is connected between the first temperature-controlled switch detection circuit and the negative electrode of the power supply.

4. The air conditioner according to claim 1, characterized in that: Also includes: An air outlet temperature sensor connected to the housing and used to detect the air outlet temperature of the heat exchange air outlet; The controller comprises a temperature detection port, and the temperature detection port is connected to the air outlet temperature sensor to obtain the air outlet temperature at the heat exchange air outlet.

5. The air conditioner according to claim 2, characterized in that: The first temperature-controlled switch detection circuit includes a photocoupler, and the photocoupler includes a light-emitting diode and a phototransistor. When the first temperature-controlled switch is connected in series with the coil part, a side of the first temperature-controlled switch close to the coil part is connected to the positive electrode of the light-emitting diode.

6. The air conditioner according to claim 5, characterized in that: The controller includes a discharge diode, which is connected in parallel with the coil part, one end of the discharge diode is connected between the first temperature-controlled switch and the coil part, and the other end of the discharge diode is connected to the negative electrode of the power supply.

7. The air conditioner according to claim 1, characterized in that: The controller includes a first temperature-controlled switch detection port and a second temperature-controlled switch detection port, one end of the first temperature-controlled switch is connected to the first temperature-controlled switch detection circuit through the first temperature-controlled switch detection port, and one end of the second temperature-controlled switch is connected to the second temperature-controlled switch detection circuit through the second temperature-controlled switch detection port.

8. The air conditioner according to claim 1, characterized in that: There are at least two electric heating bodies, which are connected in parallel. There are at least two first temperature-controlled switches, which are connected in series. The number of the first temperature-controlled switches is the same as the number of the electric heating bodies.

9. The air conditioner according to claim 8, characterized in that: There are at least two second temperature-controlled switches, which are connected in parallel, and the number of the second temperature-controlled switches is the same as the number of the electric heating bodies.

10. The air conditioner according to claim 1, characterized in that: The electric heating device also includes a first supporting part and a second supporting part that are arranged opposite to each other, and the two ends of the electric heating body in the length direction are respectively connected to the first supporting part and the second supporting part, the first temperature control switch is arranged on the first supporting part, and the second temperature control switch is arranged on the second supporting part, and the fuse is arranged on the first supporting part, and the fuse is located between the first control switch and the electric heating body.

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