Large-air-volume fresh air exchanger

Abstract

The utility model relates to a large-air-volume fresh air exchanger, which comprises a power supply, a control electric box, a fresh air fan, an exhaust fan and a control circuit of the control electric box, the control electric box is provided with a fan control circuit; the fan control circuit is connected to the power supply and controls the fresh air fan and the exhaust fan to work; and the control electric box control circuit is connected to the fan control circuit and controls the on-off of the fan control circuit. Therefore, according to the large-air-volume fresh air exchanger, the multi-control function of indoor multi-point position control can be achieved through simple wiring transformation, the indoor multi-point position control function is not limited to the position close to a control electric box, and the use and operation convenience and the working efficiency of a user are improved.

Description

Technical Field

[0001] The utility model relates to the field of mechanical equipment control, in particular to a large-air-volume fresh air exchanger. Background Technique

[0002] In the prior art, for an ordinary control electric box used to control a fresh air exchanger, usually after the power is turned on, the operation, function indication and abnormal warning functions of the supporting fresh air exchanger can be realized through the push-button switches and indicator lights on its panel. However, there are often some technical defects: the supporting control electric box of the fresh air exchanger product is generally designed and installed on the fresh air exchanger, and most of the whole machine products of the fresh air exchanger are installed in some special area positions, resulting in inconvenience for users when operating the fresh air exchanger and low work efficiency. Content of the Utility Model

[0003] Based on this, the purpose of the utility model is to provide a large-air-volume fresh air exchanger, which can improve the convenience and work efficiency of users in operating the fresh air exchanger.

[0004] The purpose of the utility model can be realized by the following technical solutions:

[0005] A large-air-volume fresh air exchanger includes a power supply, a control electric box, a fresh air fan and an exhaust fan. It is characterized in that it further includes a control electric box control circuit; the control electric box is provided with a fan control circuit; the fan control circuit is connected to the power supply to control the operation of the fresh air fan and the exhaust fan; the control electric box control circuit is connected to the fan control circuit to control the on-off of the fan control circuit.

[0006] Compared with the prior art, for the large-air-volume fresh air exchanger of the utility model, based on the original fan control circuit arranged in the control electric box of the fresh air exchanger, a control electric box control circuit is arranged to realize the remote and multi-link control of the fresh air exchanger, so that when the user controls and adjusts the fresh air exchanger each time, there is no need to directly contact or go to the corresponding fresh air exchanger, improving the operation convenience and work efficiency of the user.

[0007] Further, the fan control circuit includes a first terminal block, an air circuit breaker, a fresh air fan contactor, a first overcurrent protector and a fresh air fan connected in sequence, and an exhaust fan contactor, a second overcurrent protector and an exhaust fan connected to both ends of the first terminal block and the air circuit breaker in sequence. The air circuit breaker is connected to the power supply through the first terminal block. Thus, it is convenient for those skilled in the art to debug and maintain the electrical circuits of the fresh air fan and the exhaust fan respectively, and at the same time, avoid the high heat caused by overcurrent from burning out the fresh air exchanger.

[0008] Further, the control circuit of the control electric box includes a detection switch, an indicator light group, a start button, a stop button, and a second terminal block connected in sequence; the indicator light group is connected to the exhaust fan contactor through the detection switch; the start button is connected to the exhaust fan contactor through the second terminal block to trigger the conduction of the exhaust fan contactor; the stop button is connected to the exhaust fan contactor through the second terminal block to trigger the shutdown of the exhaust fan contactor. Thus, it is convenient to use the characteristics of the contactor and the control circuit of the control electric box to control the fresh air exchanger to work, improving the safety performance of the equipment.

[0009] Further, the fresh air fan contactor and the exhaust fan contactor each also have a main contact and an auxiliary contact; the start button has a first normally open pin, a second normally open pin, a first normally closed pin, and a second normally closed pin; the stop button has a third normally open pin, a fourth normally open pin, a third normally closed pin, and a fourth normally closed pin; the detection switch has a first pin and a second pin; the auxiliary contact of the fresh air fan contactor has a first auxiliary pin and a second auxiliary pin; the auxiliary contact of the exhaust fan contactor has a third auxiliary pin and a fourth auxiliary pin; the main contact of the exhaust fan contactor has a first main pin, a second main pin, and a third main pin; the second terminal block has a first terminal, a third terminal, a fourth terminal, a fifth terminal, and a sixth terminal; the fourth terminal is connected to the third terminal; a disconnectable short-circuit wire is connected between the fourth terminal and the fifth terminal; the first normally closed pin and the second normally closed pin are connected to each other, the first normally open pin is connected to the first terminal, and the second normally open pin is connected to the third terminal; the third normally closed pin and the fourth normally closed pin are connected to each other, the other end of the third normally closed pin is connected to the fifth terminal, the other end of the fourth normally closed pin is connected to the sixth terminal, and the third normally open pin and the fourth normally open pin are disconnected; the first auxiliary pin is connected to the third auxiliary pin, and the second auxiliary pin is connected to the fourth auxiliary pin; the first main pin is connected to the first terminal, the second main pin is connected to the third terminal, the third main pin is connected to the first pin, and the third auxiliary pin is connected to the sixth terminal; the second pin is connected to the first normally open pin; the start button, by receiving a key signal, switches the connection state of the connection between the first normally closed pin and the second normally closed pin to disconnected and connects the first normally open pin and the second normally open pin; the stop button, by receiving a key signal, switches the connection state of the connection between the third normally closed pin and the fourth normally closed pin to disconnected and connects the third normally open pin and the fourth normally open pin. Thus, designing a self-locking circuit facilitates the realization of control functions. At the same time, it guides those skilled in the art to perform the circuit connection operation of the specific control circuit of the control electric box.

[0010] Further, the indicator light group includes a power indicator light, an operation indicator light, and a fault indicator light; the power indicator light, the operation indicator light, and the fault indicator light are connected to the control circuit of the control electric box. Thus, it is convenient for users to obtain the working status and information of the control circuit of the control electric box and the fresh air exchanger through each function indicator light.

[0011] Further, the power indicator light has a third pin and a fourth pin, the operation indicator light has a fifth pin and a sixth pin, and the fault indicator light has a seventh pin and an eighth pin; the first overcurrent protector has a fifth normally open pin, a sixth normally open pin, a fifth normally closed pin, and a sixth normally closed pin, and the second overcurrent protector has a seventh normally open pin, an eighth normally open pin, a seventh normally closed pin, and an eighth normally closed pin; the second terminal block has a second terminal, a seventh terminal, and an eighth terminal; the first terminal is connected to the second terminal, and the seventh terminal and the eighth terminal are connected; the third pin is connected to the second pin, and the fourth pin is connected to the eighth terminal; the fifth pin is connected to the fourth normally closed pin, and the sixth pin is connected to the fifth normally closed pin; the seventh pin is connected to the second terminal, and the eighth pin is connected to the sixth normally open pin; the fifth normally open pin is connected to the eighth terminal, the sixth normally open pin is connected to the eighth normally open pin, the fifth normally closed pin is connected to the second auxiliary pin, and the sixth normally closed pin is connected to the eighth normally closed pin; the seventh normally open pin and the seventh normally closed pin are connected to the neutral wire of the first terminal block through the seventh terminal. Thus, it is convenient for technicians in the field to perform the circuit connection operations of each specific function indicator light.

[0012] Further, the large-volume fresh air exchanger further includes an external switch; the external switch is connected to the control circuit of the control electric box. Thus, it is convenient for technicians in the field to add a control switch to achieve the extended multi-link control function.

[0013] Further, the external switch includes a first button switch and a second button switch; the first button switch has a first button normally closed pin, a second button normally closed pin, and a first button normally open pin, and the second button switch has a third button normally closed pin, a fourth button normally closed pin, and a second button normally open pin; disconnect the disconnectable short - circuit wire connected between the fourth terminal and the fifth terminal; connect the first button normally closed pin to the fourth terminal, and the second button normally closed pin to the fifth terminal; connect the second button normally open pin to the first button normally closed pin, and the third button normally closed pin to the second terminal; the first button normally closed pin switches from being connected to the second button normally closed pin to being connected to the first button normally open pin by receiving a button signal; the third button normally closed pin switches from being connected to the fourth button normally closed pin to being connected to the second button normally open pin by receiving a button signal. Thus, it is convenient for those skilled in the art to perform specific circuit connection operations of the external switch.

[0014] Further, the large - air - volume fresh - air exchanger further includes an external operation indicator light; the external operation indicator light is connected to the external switch; the external operation indicator light has a ninth pin and a tenth pin, the ninth pin is connected to the second button normally closed pin, and the tenth pin is connected to the neutral wire. Thus, it is convenient for users to know the working states of the external switch and the fresh - air exchanger, and at the same time, it guides those skilled in the art to perform specific circuit connection operations of the external operation indicator light.

[0015] For better understanding and implementation, the present utility model will be described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the electrical schematic diagram of the overall circuit structure provided by the present utility model;

[0017] Figure 2 It is the electrical schematic diagram of the fan control circuit provided by the present utility model;

[0018] Figure 3 It is the electrical schematic diagram of the control box control circuit provided by the present utility model;

[0019] Figure 4 It is the electrical schematic diagram of the external switch and the indicator light provided by the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present utility model provides a large - air - volume fresh - air exchanger. To make the purpose, technical solutions and effects of the present utility model clearer and more definite, the following further describes the present utility model in detail with reference to the accompanying drawings and by way of examples.

[0021] Those skilled in the art can understand that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as the general understanding of those of ordinary skill in the art to which this utility model belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with their meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless specifically defined as herein.

[0022] The following further illustrates the content of the utility model by describing the embodiments in conjunction with the accompanying drawings.

[0023] Embodiment 1

[0024] As Figure 1 shown, this embodiment provides a large-volume fresh air exchanger, and the large-volume fresh air exchanger includes a power supply, a control electrical box, a fresh air fan, and an exhaust fan. The power supply, the control electrical box, the fresh air fan (M1 in the figure), and the exhaust fan (M1 in the figure) are connected to each other.

[0025] As Figure 2 shown, the control electrical box is provided with a fan control circuit; the fan control circuit is connected to the power supply to control the operation of the fresh air fan and the exhaust fan; the fan control circuit includes a first terminal block X1, an air circuit breaker QF, a fresh air fan contactor KM1, a first overcurrent protector FR1, and a fresh air fan connected in sequence, and a exhaust fan contactor KM2, a second overcurrent protector FR2, and an exhaust fan connected to both ends of the first terminal block X1 and the air circuit breaker QF, and the air circuit breaker QF is connected to the power supply through the first terminal block X1.

[0026] Among them, the air circuit breaker QF is an automatic protection device that uses air as the working medium to extinguish the arc and cuts off the power supply in case of a fault or accident. In some other embodiments, it can also be an air switch or a knife switch; the fresh air fan contactor KM1 and the exhaust fan contactor KM2 are switch appliances based on the electromagnetic attraction and release mechanism for controlling the on and off of the circuit. Common contactors include air contactors, electromagnetic contactors, and pneumatic contactors, etc.; the first overcurrent protector FR1 and the second overcurrent protector FR2 are devices that detect overcurrent in the circuit and prevent it from exceeding a preset threshold. When the current exceeds the rated value, the overcurrent protector will cut off the circuit. Common protection methods of overcurrent protectors include limited power type, rollback type, and break-and-separate type, etc.

[0027] Specifically, in the fan control circuit, the fresh air fan contactor KM1, the first overcurrent protector FR1, the fresh air fan, the first terminal block X1, and the air circuit breaker QF are connected in series in sequence. The exhaust fan contactor KM2, the second overcurrent protector FR2, the exhaust fan, the first terminal block X1, and the air circuit breaker QF are connected in series in sequence. Thus, those skilled in the art can simply modify or repair the control circuits of the fresh air fan or the exhaust fan.

[0028] As Figure 3 shown, the large-volume fresh air exchanger further includes a control cabinet control circuit; the control cabinet control circuit is used to control the control cabinet; the control cabinet control circuit is connected to the fan control circuit to control the on / off of the fan control circuit; the control cabinet control circuit includes a detection switch SA1, an indicator light group, a start button SB1, a stop button SB2, and a second terminal block X2 that are connected in sequence; the indicator light group is connected to the exhaust fan contactor KM2 through the detection switch SA1; the start button SB1 is connected to the exhaust fan contactor KM2 through the second terminal block X2 to trigger the conduction of the exhaust fan contactor KM2; the stop button SB2 is connected to the exhaust fan contactor KM2 through the second terminal block X2 to trigger the shutdown of the exhaust fan contactor KM2.

[0029] Among them, in the fresh air fan contactor KM1 and the exhaust fan contactor KM2, by controlling the energization or de-energization of their auxiliary contacts, the auxiliary contacts can obtain or lose magnetism, and further the main contacts can be closed or opened; the auxiliary contacts can be coils or electromagnets. Thus, it is convenient to use the characteristics of the contactor and the control cabinet control circuit to control the fresh air exchanger to work, and it can achieve controlling a large current with a small current, improving the safety performance of the equipment.

[0030] Specifically, the fresh air fan contactor KM1 and the exhaust fan contactor KM2 each have main contacts and auxiliary contacts. The start button SB1 has a first normally open pin SB1:3, a second normally open pin SB1:4, a first normally closed pin SB1:1, and a second normally closed pin SB1:2; the stop button SB2 has a third normally open pin SB2:3, a fourth normally open pin SB2:4, a third normally closed pin SB2:1, and a fourth normally closed pin SB2:2; the detection switch SA1 has a first pin SA1:3 and a second pin SA1:4; the auxiliary contact of the fresh air fan contactor KM1 has a first auxiliary pin KM1:A1 and a second auxiliary pin KM1:A2; the auxiliary contact of the exhaust fan contactor KM2 has a third auxiliary pin KM2:A1 and a fourth auxiliary pin KM2:A2; the main contact of the exhaust fan contactor KM2 has a first main pin KM2:13, a second main pin KM2:14, and a third main pin KM2:L1; the second terminal block X2 has a first terminal X2:1, a third terminal X2:3, a fourth terminal X2:4, a fifth terminal X2:5, and a sixth terminal X2:6; the fourth terminal X2:4 is connected to the third terminal X2:3; a disconnectable short-circuit wire DX1 is connected between the fourth terminal X2:4 and the fifth terminal X2:5; the first normally closed pin SB1:1 is connected to the second normally closed pin SB1:2, the first normally open pin SB1:3 is connected to the first terminal X2:1, and the second normally open pin SB1:4 is connected to the third terminal X2:3; the third normally closed pin SB2:1 is connected to the fourth normally closed pin SB2:2, the other end of the third normally closed pin SB2:1 is connected to the fifth terminal X2:5, the other end of the fourth normally closed pin SB2:2 is connected to the sixth terminal X2:6, and the third normally open pin SB2:3 and the fourth normally open pin SB2:4 are disconnected; the first auxiliary pin KM1:A1 is connected to the third auxiliary pin KM2:A1, and the second auxiliary pin KM1:A2 is connected to the fourth auxiliary pin KM2:A2; the first main pin KM2:13 is connected to the first terminal X2:1, the second main pin KM2:14 is connected to the third terminal X2:3, the third main pin KM2:L1 is connected to the first pin SA1:3, and the third auxiliary pin KM2:A1 is connected to the sixth terminal X2:6; the second pin SA1:4 is connected to the first normally open pin SB1:3.

[0031] The working principle of the control electric box control circuit is as follows:

[0032] The start button SB1, upon receiving a key signal, switches the connection state between the first normally closed pin SB1:1 and the second normally closed pin SB1:2 from connected to disconnected, and connects the first normally open pin SB1:3 and the second normally open pin SB1:4. When the start button SB1 is pressed, the first main pin KM2:13 and the second main pin KM2:14 are connected and closed. Since this pair of main pins is in parallel with the first normally open pin SB1:3 and the second normally open pin SB1:4, a self-locking circuit is formed. Therefore, even if the start button SB1 is released after being pressed, since the first main pin KM2:13 and the second main pin KM2:14 remain connected and closed, the control cabinet still operates normally. The stop button SB2, upon receiving a key signal, switches the connection state between the third normally closed pin SB2:1 and the fourth normally closed pin SB2:2 from connected to disconnected, and connects the third normally open pin SB2:3 and the fourth normally open pin SB2:4.

[0033] The indicator light group includes a power indicator LAMP1, an operation indicator LAMP2, and a fault indicator LAMP3; the power indicator LAMP1, the operation indicator LAMP2, and the fault indicator LAMP3 are connected to the control circuit of the control cabinet.

[0034] Specifically, the power indicator lamp LAMP1 has a third pin LAMP1:1 and a fourth pin LAMP1:2, the running indicator lamp LAMP2 has a fifth pin LAMP2:1 and a sixth pin LAMP2:2, and the fault indicator lamp LAMP3 has a seventh pin LAMP3:1 and an eighth pin LAMP3:2; the first overcurrent protector FR1 has a fifth normally open pin FR1:97, a sixth normally open pin FR1:98, a fifth normally closed pin FR1:95, and a sixth normally closed pin FR1:96, and the second overcurrent protector FR2 has a seventh normally open pin FR2:97, an eighth normally open pin FR2:98, a seventh normally closed pin FR2:95, and an eighth normally closed pin FR2:96; the second terminal block X2 has a second terminal X2:2, a seventh terminal X2:7, and an eighth terminal X2:8; the first terminal X2:1 is connected to the second terminal X2:2, and the seventh terminal X2:7 is connected to the eighth terminal X2:8; the third pin LAMP1:1 is connected to the second pin SA1:4, and the fourth pin LAMP1:2 is connected to the eighth terminal X2:8; the fifth pin LAMP2:1 is connected to the fourth normally closed pin SB2:2, and the sixth pin LAMP2:2 is connected to the fifth normally closed pin FR1:95; the seventh pin LAMP3:1 is connected to the second terminal X2:2, and the eighth pin LAMP3:2 is connected to the sixth normally open pin FR1:98; the fifth normally open pin FR1:97 is connected to the eighth terminal X2:8, the sixth normally open pin FR1:98 is connected to the eighth normally open pin FR2:98, the fifth normally closed pin FR1:95 is connected to the second auxiliary pin KM1:A2, and the sixth normally closed pin FR1:96 is connected to the eighth normally closed pin FR2:96; the seventh normally open pin FR2:97 and the seventh normally closed pin FR2:95 are connected to the neutral wire of the first terminal block X1 through the seventh terminal X2:7.

[0035] The working principles of the power indicator lamp LAMP1, the operation indicator lamp LAMP2, and the fault indicator lamp LAMP3 are as follows: When the detection switch SA1 connects the first pin SA1:3 and the second pin SA1:4 by receiving a key signal, the power indicator lamp LAMP1 is energized and lit, and the control electric box is powered on. When the start button SB1 connects the first normally closed pin SB1:1 and the second normally closed pin SB1:2 to be disconnected by receiving a key signal, and connects the first normally open pin SB1:3 and the second normally open pin SB1:4, the operation indicator lamp LAMP2 is energized and lit, and the control electric box starts to operate. When the stop button SB2 connects the third normally closed pin SB2:1 and the fourth normally closed pin SB2:2 to be disconnected by receiving a key signal, and connects the third normally open pin SB2:3 and the fourth normally open pin SB2:4, the operation indicator lamp LAMP2 loses power and goes out, and the control electric box stops operating. When the fresh air fan runs abnormally with an increase in temperature or excessive current, the first overcurrent protector FR1 triggers the protection function, and the fifth normally open pin FR1:97 and the sixth normally open pin FR1:98 are connected and closed, and the fault indicator lamp LAMP3 is energized and lit; when the exhaust fan runs abnormally with an increase in temperature or excessive current, the second overcurrent protector FR2 triggers the protection function, and the seventh normally open pin FR2:97 and the eighth normally open pin FR2:98 are connected and closed, and the fault indicator lamp LAMP3 is energized and lit.

[0036] As Figure 4 shown, the large-volume fresh air exchanger further includes an external switch SB3; the external switch SB3 is connected to the control circuit of the control electric box.

[0037] Specifically, the external switch SB3 includes a first key switch and a second key switch; the first key switch has a first key normally closed pin SB3:L2, a second key normally closed pin SB3:L2A, and a first key normally open pin SB3:L2B, and the second key switch has a third key normally closed pin SB3:L1, a fourth key normally closed pin SB3:L1A, and a second key normally open pin SB3:L1B; the disconnectable short-circuit wire DX1 connecting the fourth terminal X2:4 and the fifth terminal X2:5 is disconnected; the first key normally closed pin SB3:L2 is connected to the fourth terminal X2:4, and the second key normally closed pin SB3:L2A is connected to the fifth terminal X2:5; the second key normally open pin SB3:L1B is connected to the first key normally closed pin SB3:L2, and the third key normally closed pin SB3:L1 is connected to the second terminal X2:2.

[0038] The working principle of the external switch SB3 is as follows: the normally closed pin SB3:L2 of the first button switches from being connected to the normally closed pin SB3:L2A of the second button to being connected to the normally open pin SB3:L2B of the first button by receiving a button signal; the normally closed pin SB3:L1 of the third button switches from being connected to the normally closed pin SB3:L1A of the fourth button to being connected to the normally open pin SB3:L1B of the second button by receiving a button signal.

[0039] The large air volume fresh air exchanger further includes an external operation indicator lamp LAMP4; the external operation indicator lamp LAMP4 is connected to the external switch SB3.

[0040] Specifically, the external operation indicator lamp LAMP4 has a ninth pin LAMP4:1 and a tenth pin LAMP4:2. The ninth pin LAMP4:1 is connected to the normally closed pin SB3:L2A of the second button, and the tenth pin LAMP4:2 is connected to the neutral line N.

[0041] The working principle of the external operation indicator lamp LAMP4 is as follows: when the normally closed pin SB3:L2 of the first button switches from being connected to the normally closed pin SB3:L2A of the second button to being connected to the normally open pin SB3:L2B of the first button by receiving a button signal; or when the normally closed pin SB3:L1 of the third button switches from being connected to the normally closed pin SB3:L1A of the fourth button to being connected to the normally open pin SB3:L1B of the second button by receiving a button signal, the external operation indicator lamp LAMP4 is powered on and lights up.

[0042] In addition, the present utility model also provides some additional wiring methods to solve the technical problem that multiple external start / stop control switches need to be expanded externally, so as to realize the multi-link start / stop control function at different positions.

[0043] In one embodiment, when more external switches are needed, a second external switch SB4 is set. The second external switch SB4 is connected to the external switch SB3; the second external switch SB4 includes a third button switch and a fourth button switch; the third button switch has a fifth normally closed pin SB4:L2, a sixth normally closed pin SB4:L2A, and a third normally open pin SB4:L2B, and the fourth button switch has a seventh normally closed pin SB4:L1, an eighth normally closed pin SB4:L1A, and a fourth normally open pin SB4:L1B.

[0044] Specifically, the wiring method is as follows: The normally closed pin SB4:L2 of the fifth button is connected to the normally open pin SB4:L1B of the fourth button; A wire is led out from the normally closed pin SB3:L1 of the third button and connected to the normally closed pin SB4:L1 of the seventh button, and a wire is led out from the normally closed pin SB3:L2A of the second button and connected to the normally closed pin SB4:L2 of the fifth button. The normally closed pin SB4:L2A of the sixth button is connected to the fifth terminal X2:5.

[0045] The working principle of the second external switch SB4 is as follows: The normally closed pin SB4:L2 of the fifth button switches from being connected to the normally closed pin SB4:L2A of the sixth button to being connected to the normally open pin SB4:L2B of the third button by receiving a button signal; The normally closed pin SB4:L1 of the seventh button switches from being connected to the normally closed pin SB4:L1A of the eighth button to being connected to the normally open pin SB4:L1B of the fourth button by receiving a button signal.

[0046] In addition, if the second external switch SB4 needs to be indicated by an indicator light, only a wire needs to be led out from the normally closed pin SB4:L2A of the sixth button and connected to one end of the indicator light, and the other end of the indicator light is connected to the power supply neutral line N, so that the operation or stop state of the device can be indicated by an indicator light in each room or location where the start / stop switch is located.

[0047] Compared with the prior art, based on the original fan control circuit provided in the control electric box of the fresh air exchanger, the present utility model provides a control electric box control circuit, realizing remote and multi-link control of the fresh air exchanger. When the user controls and adjusts the fresh air exchanger each time, there is no need to directly contact or go to the corresponding fresh air exchanger, improving the operation convenience and work efficiency of the user. At the same time, the specific connection methods of the additional external switch and the external operation indicator light are provided, providing a guiding method for those skilled in the art to transform the control electric boxes of other devices, facilitating the realization of user requirements, and better meeting the user's usage and control needs.

[0048] The above embodiments only represent several implementation manners of the present utility model, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and the present utility model also intends to include these modifications and improvements.

Claims

1. A large air volume fresh air exchanger, comprising a power supply, a control box, a fresh air fan and an exhaust fan, characterized in that: It also includes a control box control circuit; The control electrical box is provided with a fan control circuit; the fan control circuit is connected to the power supply to control the operation of the fresh air fan and the exhaust fan; The control circuit of the control box is connected to the fan control circuit to control the on and off of the fan control circuit.

2. The large air volume fresh air exchanger according to claim 1 is characterized in that: The fan control circuit includes a first terminal block, an air circuit breaker, a fresh air fan contactor, a first overcurrent protector and a fresh air fan connected in sequence, and an exhaust fan contactor, a second overcurrent protector and an exhaust fan connected in sequence to both ends of the first terminal block and the air circuit breaker, and the air circuit breaker is connected to the power supply through the first terminal block.

3. The large air volume fresh air exchanger according to claim 2 is characterized in that: The control circuit of the control box includes a detection switch, an indicator light group, a start button, a stop button and a second terminal block connected in sequence; the indicator light group is connected to the exhaust fan contactor through the detection switch; the start button is connected to the exhaust fan contactor through the second terminal block, triggering the exhaust fan contactor to turn on; the stop button is connected to the exhaust fan contactor through the second terminal block, triggering the exhaust fan contactor to turn off.

4. The large air volume fresh air exchanger according to claim 3 is characterized in that: The fresh air fan contactor and the exhaust fan contactor each further have a main contact and an auxiliary contact; the start button has a first normally open pin, a second normally open pin, a first normally closed pin, and a second normally closed pin; the stop button has a third normally open pin, a fourth normally open pin, a third normally closed pin, and a fourth normally closed pin; the detection switch has a first pin and a second pin; the auxiliary contact of the fresh air fan contactor has a first auxiliary pin and a second auxiliary pin; the auxiliary contact of the exhaust fan contactor has a third auxiliary pin and a fourth auxiliary pin; the main contact of the exhaust fan contactor has a first main pin, a second main pin, and a third main pin; the second terminal block has a first terminal, a third terminal, a fourth terminal, a fifth terminal, and a sixth terminal; the fourth terminal is connected to the third terminal; a disconnectable short-circuit wire is connected between the fourth terminal and the fifth terminal; The first normally closed pin is connected to the second normally closed pin, the first normally open pin is connected to the first terminal, and the second normally open pin is connected to the third terminal; the third normally closed pin is connected to the fourth normally closed pin, the other end of the third normally closed pin is connected to the fifth terminal, the other end of the fourth normally closed pin is connected to the sixth terminal, and the third normally open pin is disconnected from the fourth normally open pin; the first auxiliary pin is connected to the third auxiliary pin, and the second auxiliary pin is connected to the fourth auxiliary pin; the first main pin is connected to the first terminal, the second main pin is connected to the third terminal, the third main pin is connected to the first pin, and the third auxiliary pin is connected to the sixth terminal; the second pin is connected to the first normally open pin; The start button switches the connection state between the first normally closed pin and the second normally closed pin to disconnected by receiving a key signal, and connects the first normally open pin to the second normally open pin; the stop button switches the connection state between the third normally closed pin and the fourth normally closed pin to disconnected by receiving a key signal, and connects the third normally open pin to the fourth normally open pin.

5. The large air volume fresh air exchanger according to claim 4 is characterized in that: The indicator light group includes a power indicator light, an operation indicator light and a fault indicator light; the power indicator light, the operation indicator light and the fault indicator light are connected to the control circuit of the control box.

6. The large air volume fresh air exchanger according to claim 5, characterized in that: The power indicator light has a third pin and a fourth pin, the operation indicator light has a fifth pin and a sixth pin, and the fault indicator light has a seventh pin and an eighth pin; the first overcurrent protector has a fifth normally open pin, a sixth normally open pin, a fifth normally closed pin, and a sixth normally closed pin, and the second overcurrent protector has a seventh normally open pin, an eighth normally open pin, a seventh normally closed pin, and an eighth normally closed pin; the second terminal block has a second terminal, a seventh terminal, and an eighth terminal; the first terminal is connected to the second terminal, and the seventh terminal is connected to the eighth terminal; The third pin is connected to the second pin, and the fourth pin is connected to the eighth terminal; the fifth pin is connected to the fourth normally closed pin, and the sixth pin is connected to the fifth normally closed pin; the seventh pin is connected to the second terminal, and the eighth pin is connected to the sixth normally open pin; the fifth normally open pin is connected to the eighth terminal, the sixth normally open pin is connected to the eighth normally open pin, the fifth normally closed pin is connected to the second auxiliary pin, and the sixth normally closed pin is connected to the eighth normally closed pin; the seventh normally open pin and the seventh normally closed pin are connected to the neutral line of the first terminal block through the seventh terminal.

7. The large air volume fresh air exchanger according to claim 6, characterized in that: The large air volume fresh air exchanger also includes an external switch; the external switch is connected to the control circuit of the control electrical box.

8. The large air volume fresh air exchanger according to claim 7, characterized in that: The external switch includes a first key switch and a second key switch; the first key switch has a first key normally closed pin, a second key normally closed pin and a first key normally open pin, and the second key switch has a third key normally closed pin, a fourth key normally closed pin and a second key normally open pin; The disconnectable short-circuit wire connected between the fourth terminal and the fifth terminal is disconnected; the first button normally closed pin is connected to the fourth terminal, and the second button normally closed pin is connected to the fifth terminal; the second button normally open pin is connected to the first button normally closed pin, and the third button normally closed pin is connected to the second terminal; The first button normally closed pin switches from being connected to the second button normally closed pin to being connected to the first button normally open pin by receiving a button signal; the third button normally closed pin switches from being connected to the fourth button normally closed pin to being connected to the second button normally open pin by receiving a button signal.

9. The large air volume fresh air exchanger according to claim 8, characterized in that: The large air volume fresh air switch also includes an external operation indicator light; the external operation indicator light is connected to the external switch; the external operation indicator light has a ninth pin and a tenth pin, the ninth pin is connected to the second button normally closed pin, and the tenth pin is connected to the neutral line.

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