Patent Description:
Single-duct systems are widely used in the air conditioner industry, that is, air-input and air-output systems of the air conditioner share the same duct. Due to a small size of the duct, the association standard, T/CAB CSISA <NUM>-<NUM> ("Artificial environment comfort products Part <NUM>: Room air conditioner with outdoor air function"), requires that a noise value of the ventilation-air conditioner should meet a noise value standard corresponding to a specific ventilation volume.

<CIT> relates to a ventilating and air-conditioning system. In the system, three air conditioners A-C and one ventilation fan <NUM> are controlled in linkage, for instance. Each of the three air conditioners A, B and C is equipped with an air conditioning part <NUM> and a ventilating part <NUM> and with an air conditioner control part <NUM> and a ventilation control part <NUM> for controlling the air conditioning part <NUM> and the ventilating part <NUM> respectively. A central processing unit <NUM> receives a ventilation request signal on the air conditioner side input from the air conditioner control part <NUM> of each of the air conditioners A-C and a ventilation fan operation signal input from a ventilation fan control part <NUM> and outputs a control signal to the ventilation control part <NUM> of each of the air conditioners A-C to maintain an air supply and exhaust balance in a building.

To meet the above noise reduction requirement, a mute mode of a current air conditioner structure is realized by active noise reduction, such as a measure of reducing a rotation speed of a blower. However, the reduction of the rotation speed of the blower may diminish the ventilation volume of the air conditioner, and thus affect the user experience indoors.

The present invention provides a ventilation and air conditioning system and a method for regulating an air opening of a ventilation and air conditioning system, so as to realize noise reduction for a ventilation-air conditioner without changing a rotation speed of a blower.

A ventilation and air conditioning system includes the features of amended claim <NUM>.

Preferably, the air-opening varying component regulates a size of an air opening of the ventilation outlet of the ventilation system according to a rotation speed of a first blower of the ventilation system.

Preferably, a purification chamber is provided in the ventilation system, and the purification chamber has a first end connected with the ventilation inlet and a second end connected with the ventilation outlet.

Preferably, the purification chamber is provided with a detachable filter screen, and the first blower is provided between the filter screen and the ventilation outlet and adjacent to the ventilation outlet.

Preferably, the ventilation and air conditioning system further includes a controller configured to request a rotation-speed value of the first blower, determine a size of the air opening of the ventilation outlet, and send the air-opening varying component a control command for regulating the size of the air opening.

Preferably, the heat exchanging unit is configured in a U-shaped structure, an end of the heat exchanging unit away from an opening of the U-shaped structure faces the heat exchanging inlet, and the heat exchanging outlet is arranged at an end adjacent to the opening of the U-shaped structure; and a second blower is provided at the end adjacent to the opening of the U-shaped structure.

Preferably, the air inlet duct is provided at the heat exchanging outlet of the heat exchanging system; first blowers re provided at both sides of the filter screen, one of the first blowers is adjacent to the air inlet duct, and another one of the first blowers is adjacent to the ventilation outlet.

Preferably, the ventilation outlet is provided with a closing device configured to open or close the ventilation outlet.

Preferably, the ventilation outlet is provided with a first notch on a side adjacent to an exterior of the housing, and the first notch is arranged along a circle of the ventilation outlet and configured to cooperate with the closing device to close the ventilation outlet.

The present invention has beneficial effects as follows.

For the ventilation and air conditioning system with independent air ducts, the ventilation system and the heat exchanging system operate independently. An increase in noise of the ventilation system is caused due to a small air duct when the ventilation system is operating with maximum ventilation. Meanwhile, after the heat exchanging system operates together, the noises of the two systems are superimposed, which will affect the user experience indoors. By arranging the air-opening varying component at the ventilation outlet of the ventilation system, when it is detected that the rotation speed of the first blower of the ventilation system is increased, the size of the air opening of the ventilation outlet is changed actively, such that the air flow velocity decreases in the case of an increased air volume, thus effectively reducing the air flow noise during the operation of the ventilation system operates, and improving the user experience.

Specifically, the air-opening varying component is mounted at the ventilation outlet of the ventilation system, and the air-opening varying component controlling the size of the air opening and the ventilation system are subject to coordinated control. When it is detected that the rotation speed of the first blower of the ventilation system is increased, the size of the air opening may be actively expanded, and thus the air flow velocity is decreased, so as to reduce the noise generated by the air flow at the air opening, and improve the user experience.

By mounting the air-opening varying component, when the ventilation system is operating, the size of the air opening can be regulated according to the rotation speed of the blower of the indoor ventilation system. As a result, when the ventilation system increases the air volume, the air flow velocity decreases and the noise caused by the air flow is reduced, thus realizing better user experience.

Through the use of the air-opening varying component, when the increase of the rotation speed of the blower of the indoor ventilation system is detected, the size of the air opening can be automatically regulated, to decrease the air flow velocity of the ventilation system, reduce the noise caused by the air flow, and effectively improve the indoor noise when the ventilation-air conditioner is operating in both the ventilation state and the cooling/heating state.

This technical solution is mainly applied in the domestic ventilation and air conditioning scenes, but is not limited to the air conditioning scenes, and can also be applied to domestic air management unit scenes including air purification scenes and ventilator scenes.

The present invention also provides a method for regulating an air opening of a ventilation and air conditioning system as defined in claim <NUM>.

A controller sends a first blower a request command for requesting a rotation-speed value of the first blower. In response to the request command, the first blower sends the rotation-speed value to the controller. The controller determines the size of the air opening of the ventilation outlet according to the rotation-speed value, and sends the air-opening varying component a control command for regulating the size of the air opening. The air-opening varying component regulates the size of the air opening of the ventilation outlet according to the control command.

Other features and advantages of the present invention will be described in the following description, and will be obvious from the specification, or may be understood by implementing the present invention. The objectives and other advantages of the present invention may be implemented and achieved by the written description and the structures indicated particularly in the accompanying drawings.

Implementations of the technical schemes of the present invention will be further described in detail in combination with drawings and embodiments.

Preferred embodiments of the invention will be described in conjunction with the accompanying drawings, and it shall be understood that the preferred embodiments described here are only for describing and explaining the present invention, rather than limiting the present invention.

As illustrated in <FIG>, an embodiment of the present invention provides a ventilation and air conditioning system. The ventilation and air conditioning system includes a ventilation and air conditioning body and an air-opening varying component <NUM> arranged at a ventilation outlet <NUM> of the ventilation and air conditioning body. The ventilation and air conditioning body includes a ventilation system <NUM> and a heat exchanging system <NUM>, and the air-opening varying component <NUM> is arranged at the ventilation outlet <NUM> of the ventilation system <NUM>. The air-opening varying component <NUM> regulates a size of an air opening of the ventilation outlet <NUM> of the ventilation system <NUM> according to a rotation speed of the ventilation system <NUM>. The ventilation and air conditioning system also includes a controller configured to request a rotation-speed value of a first blower <NUM>, determine the size of the air opening of the ventilation outlet <NUM> based on the rotation-speed value, and send the air-opening varying component <NUM> a control command for regulating the size of the air opening. A driving mechanism is provided between the controller and the air-opening varying component <NUM> and is configured to execute a driving command of the controller, thereby realizing drive control over the air-opening varying component <NUM>, so as to achieve a purpose of regulating the size of the air opening of the ventilation outlet <NUM> by the air-opening varying component <NUM>.

For the ventilation and air conditioning system with independent air ducts, the ventilation system <NUM> and the heat exchanging system <NUM> operate independently. An increase in noise of the ventilation system <NUM> is caused due to a small air duct when the ventilation system <NUM> is operating with maximum ventilation. Meanwhile, after the heat exchanging system <NUM> operates together, the noises of the two systems are superimposed, which will affect the user experience indoors. By arranging the air-opening varying component <NUM> at the ventilation outlet <NUM> of the ventilation system <NUM>, when it is detected that the rotation speed of the first blower <NUM> of the ventilation system <NUM> is increased, the size of the air opening of the ventilation outlet <NUM> is changed actively, such that the air flow velocity decreases in the case of an increased air volume, thus effectively reducing the air flow noise during the operation of the ventilation system <NUM>, and improving the user experience.

Specifically, the air-opening varying component <NUM> is mounted at the ventilation outlet <NUM> of the ventilation system <NUM>, and the air-opening varying component <NUM> controlling the size of the air opening and the ventilation system <NUM> are subject to coordinated control. When it is detected that the rotation speed of the first blower <NUM> of the ventilation system <NUM> is increased, the size of the air opening may be actively expanded, and thus the air flow velocity is decreased, so as to reduce the noise generated by the air flow at the air opening, and improve the user experience.

By mounting the air-opening varying component <NUM>, when the ventilation system <NUM> is operating, the size of the air opening can be regulated according to the rotation speed of the blower of the indoor ventilation system <NUM>. As a result, when the ventilation system <NUM> increases the air volume, the air flow velocity decreases and the noise caused by the air flow is reduced, thus realizing better user experience.

Through the use of the air-opening varying component <NUM>, when the increase of the rotation speed of the blower of the indoor ventilation system is detected, the size of the air opening can be automatically regulated, to decrease the air flow velocity of the ventilation system <NUM>, reduce the noise caused by the air flow, and effectively improve the indoor noise when the ventilation-air conditioner is operating in both the ventilation state and the cooling/heating state.

The ventilation and air conditioning system may be applied in the domestic ventilation and air conditioning scenes, but is not limited to the air conditioning scenes, and can also be applied to domestic air management unit scenes including air purification scenes and ventilator scenes.

The present invention provides a method for regulating the air opening of the ventilation and air conditioning system as defined in claim <NUM>.

The controller sends the first blower <NUM> a request command for requesting a rotation-speed value of the first blower.

In response to the request command, the first blower <NUM> sends the rotation-speed value to the controller.

The controller determines the size of the air opening of the ventilation outlet <NUM> according to the rotation-speed value, and sends the air-opening varying component <NUM> a control command for regulating the size of the air opening.

The air-opening varying component <NUM> regulates the size of the air opening of the ventilation outlet <NUM> according to the control command.

For the ventilation and air conditioning system with independent air ducts, the ventilation system <NUM> and the heat exchanging system <NUM> operate independently. The noise of the ventilation system <NUM> is increased due to a small air duct when the ventilation system <NUM> is operating with maximum ventilation. Meanwhile, after the heat exchanging system operates together, the noises of the two systems <NUM>, <NUM> are superimposed, which will affect the user experience indoors. By arranging the air-opening varying component <NUM> at the ventilation outlet <NUM> of the ventilation system <NUM>, when it is detected that the rotation speed of the first blower <NUM> of the ventilation system <NUM> is increased, the size of the air opening of the ventilation outlet <NUM> is changed actively, such that the air flow velocity decreases in the case of an increased air volume, thus effectively reducing the air flow noise during the operation of the ventilation system <NUM>, and improving the user experience.

Specifically, the air-opening varying component <NUM> is mounted at the ventilation outlet <NUM> of the ventilation system, and the air-opening varying component <NUM> controlling the size of the air opening is controlled in conjunction with the ventilation system <NUM>. When it is detected that the rotation speed of the first blower <NUM> of the ventilation system <NUM> is increased, the size of the air opening may be actively expanded, and thus the air flow velocity is decreased, so as to reduce the noise generated by the air flow at the air opening, and improve the user experience.

By mounting the air-opening varying component <NUM>, when the ventilation system <NUM> is operating, the size of the air opening can be regulated according to the rotation speed of the blower of the indoor ventilation system. As a result, when the ventilation system <NUM> increases the air volume, the air flow velocity decreases and the noise caused by the air flow is reduced, thus realizing better user experience.

Through the use of the air-opening varying component <NUM>, when the increase of the rotation speed of the blower of the indoor ventilation system <NUM> is detected, the size of the air opening can be automatically regulated, to decrease the air flow velocity of the ventilation system <NUM>, reduce the noise caused by the air flow, and effectively improve the indoor noise when the ventilation-air conditioner is operating in both the ventilation state and the cooling/heating state.

When the ventilation system <NUM> is working, the rotation speed of the first blower <NUM> is too high, such that air in a purification chamber <NUM> is rapidly discharged from the ventilation outlet <NUM>, resulting in a whistling sound caused by the rapid outflow of the air. However, by arranging the air-opening varying component <NUM> at the ventilation outlet <NUM>, the size of the air opening of the ventilation outlet <NUM> may be enlarged or narrowed according to the rotation speed of the first blower <NUM> which keeps unchanged. For example, when the rotation speed of the first blower <NUM> is greater than r, a rotation-speed sensor collects the rotation-speed value of the first blower <NUM>, and transmits the collected rotation-speed value to the controller which receives a rotation-speed value greater than r. The controller then sends a command to the driving mechanism, such that the driving mechanism can enlarge an opening of the air-opening varying component <NUM>, and the air opening of the ventilation outlet <NUM> can become larger. In such a way, with the air speed unchanged, the whistling sound generated by the rapid outflow of the air is reduced, and more fresh air may flow indoors, enhancing the ventilation efficiency.

When the rotation speed of the first blower <NUM> is less than r, the rotation-speed sensor collects the rotation-speed value of the first blower <NUM>, and transmits the collected rotation-speed value to the controller which receives a rotation-speed value less than r. The controller then sends a command to the driving mechanism, such that the driving mechanism can narrow the opening of the air-opening varying component <NUM>, and the air opening of the ventilation outlet <NUM> can become smaller. Therefore, in the case of low air speed, the small ventilation outlet is used for indoor air filtration, reducing the possibility that external air flows back to the purification chamber via a too-large ventilation outlet, and improving the service life of the ventilation system and that of a filter screen.

This technical solution is mainly applied in the domestic ventilation and air conditioning scenes, but is not limited to the air-conditioning scenes, and can also be applied to domestic air management unit scenes including air purification scenes and ventilator scenes.

As illustrated in <FIG> and <FIG>, the ventilation system <NUM> has a first end configured as the ventilation outlet <NUM> and a second end configured as a ventilation inlet <NUM>. The ventilation system <NUM> and the heat exchanging system <NUM> are arranged in a common housing <NUM>, and a partition board <NUM> is provided between the ventilation system <NUM> and the heat exchanging system <NUM>. A heat exchanging inlet <NUM> of the heat exchanging system <NUM> and the ventilation outlet <NUM> of the ventilation system <NUM> are on a common surface of the housing <NUM>. A purification chamber <NUM> is provided in the ventilation system <NUM>, and the purification chamber <NUM> has a first end connected with the ventilation inlet <NUM> and a second end connected with the ventilation outlet <NUM>. The purification chamber <NUM> is provided with a detachable filter screen <NUM>. The first blower <NUM> is provided between the filter screen <NUM> and the ventilation outlet <NUM> and adjacent to the ventilation outlet <NUM>. A heat exchanging unit <NUM> is provided between the heat exchanging inlet <NUM> and a heat exchanging outlet <NUM> of the heat exchanging system <NUM>. The heat exchanging outlet <NUM> of the heat exchanging system <NUM> is provided with an air inlet duct <NUM>. The air inlet duct <NUM> leads to the ventilation inlet <NUM> at a first end, and a second end of the air inlet duct <NUM> is connected with the purification chamber <NUM>. The ventilation outlet <NUM> runs through the housing <NUM> and is in connection with the exterior of the housing <NUM>. The ventilation and air conditioning system also includes the controller configured to request a rotation-speed value of the first blower <NUM>, determine a size of an air opening of the ventilation outlet <NUM>, and send the air-opening varying component <NUM> a control command for regulating the size of the air opening. The driving mechanism is provided between the controller and the air-opening varying component <NUM> and is configured to execute a driving command of the controller, thereby realizing drive control over the air-opening varying component <NUM>, to realize a purpose of regulating the size of the air opening of the ventilation outlet by the air-opening varying component <NUM>.

The air inlet duct <NUM> of the ventilation system <NUM> passes through the heat exchanging outlet <NUM> of the heat exchanging system <NUM>, such that the heat exchanging system <NUM> utilizes heat-exchanged air to exchange heat with the air passing through the air inlet duct <NUM>. In such a way, the air introduced by the air inlet duct <NUM> from the indoor to the purification chamber <NUM> has experienced heat exchange in advance, then is filtered by the filter screen <NUM> in the purification chamber <NUM>, and is discharged through the ventilation outlet <NUM>. During the discharge, since the rotation speed of the first blower <NUM> is too high, the air in the purification chamber <NUM> is rapidly discharged from the ventilation outlet <NUM>, resulting in the whistling sound caused by the rapid outflow of the air. However, by arranging the air-opening varying component <NUM> at the ventilation outlet <NUM>, the size of the air opening of the ventilation outlet <NUM> may be enlarged or narrowed according to the rotation speed of the first blower <NUM> which keeps unchanged. For example, when the rotation speed of the first blower <NUM> is greater than r, the rotation-speed sensor collects the rotation-speed value of the first blower <NUM>, and transmits the collected rotation-speed value to the controller which receives a rotation-speed value greater than r. The controller then sends a command to the driving mechanism, such that the driving mechanism can enlarge an opening of the air-opening varying component <NUM>, and the air opening of the ventilation outlet <NUM> can become larger. In such a way, with the air speed unchanged, the whistling sound generated by the rapid outflow of the air flow is reduced, and more fresh air may flow indoors, improving the ventilation efficiency.

When the rotation speed of the first blower <NUM> is less than r, the rotation-speed sensor collects the rotation-speed value of the first blower <NUM>, and transmits the collected rotation-speed value to the controller which receives a rotation-speed value less than r. The controller then sends a command to the driving mechanism, such that the driving mechanism can narrow the opening of the air-opening varying component <NUM>, and the air opening of the ventilation outlet <NUM> can become smaller. Therefore, in the case of low air speed, the small ventilation outlet is used for indoor air filtration, reducing the possibility that external air flows back to the purification chamber <NUM> via the ventilation outlet <NUM> due to the ventilation outlet being too large, so as to improve the service life of the ventilation system and the service life of the filter screen <NUM>. The partition board is configured to separate the ventilation system and the heat exchanging system, so that the air directions of the ventilation system and the heat exchanging system will not interfere with each other.

The ventilation system <NUM> is configured to purify air, and the heat exchanging system <NUM> is configured for heat exchange. The air inlet duct <NUM> of the ventilation system <NUM> passes through the heat exchanging outlet <NUM> of the heat exchanging system <NUM>, so that the heat exchanging system <NUM> can perform heat exchange on the input air of the ventilation system <NUM> during heat exchange. Thus, the temperature difference between the air purification by the ventilation system <NUM> and the heat exchange with the indoor air is reduced, diminishing the temperature fluctuation between the ventilation system <NUM> and the indoor, and improving the indoor comfort.

The air direction of the ventilation outlet <NUM> is opposite the air direction of the heat exchanging inlet <NUM>. The air inlet duct <NUM> runs through the partition board <NUM> and passes through the heat exchanging outlet <NUM>. The air direction of the air inlet duct <NUM> is perpendicular to the air direction of the heat exchanging outlet <NUM>. The heat exchanging unit <NUM> is configured in a U-shaped structure. An end of the heat exchanging unit <NUM> away from an opening of the U-shaped structure faces the heat exchanging inlet <NUM>, and the heat exchanging outlet <NUM> is arranged at an end of the heat exchanging unit <NUM> adjacent to the opening of the U-shaped structure. A second blower <NUM> is provided at the end adjacent to the opening of the U-shaped structure of the heat exchanging unit <NUM>, and is fixed inside the housing <NUM>. The air inlet duct <NUM> is arranged inside the housing <NUM> and adjacent to the heat exchanging outlet <NUM>. The heat exchanging unit <NUM> is preferably a finned heat exchanger of an air conditioner.

The second blower <NUM> is configured to discharge the air that has undergone heat exchange in the heat exchanging system <NUM>, and the first blower <NUM> is configured to discharge the air that has been purified in the purification chamber <NUM>. The air inlet duct <NUM> is configured as a duct, such as a metal duct or a plastic duct with the same material as the housing <NUM>. The duct may be formed separately or integrally with the housing <NUM>.

The air direction of the air inlet duct <NUM> is perpendicular to the air direction of the heat exchanging outlet <NUM>, such that cold/warm air flowing out of the heat exchanging outlet <NUM> cools or heats the air in the air inlet duct <NUM>, and hence the air flowing into the purification chamber <NUM> from the air inlet duct <NUM> is heat-exchanged in advance, further realizing the reduction in the temperature difference between the indoor air and the clean air that flows into the room after being purified in the purification chamber <NUM>.

Further, an outer diameter of the air inlet duct <NUM> is smaller than an inner diameter of the heat exchanging outlet <NUM>, such that the heat-exchanged air can be better diffused by the heat exchanging outlet <NUM>. Meanwhile, after the air passing through the air inlet duct <NUM> is heat-exchanged in advance by the heat exchanging outlet <NUM>, the air arriving in the purification chamber <NUM> can be heat-exchanged in advance, so as to further reduce the likelihood that the temperature difference between the fresh air discharged from the purification chamber <NUM> and the indoor air is large.

The air inlet duct <NUM> can run through the partition board <NUM> and a side wall of the housing <NUM>, and can be connected with the exterior of the housing <NUM>, so that the indoor air can be introduced through the ventilation inlet into the purification chamber <NUM>.

An outer sidewall of the air inlet duct <NUM> can abut against an inner wall of the housing <NUM>, or abut against an inner wall of the heat exchanging outlet <NUM>, so as to cause the air flowing through the air inlet duct <NUM> to be heat-exchanged in advance by using the air that has experienced heat exchange and is discharged from the heat exchanging outlet <NUM>. Since the outer diameter of the air inlet duct <NUM> is smaller than the inner diameter of the heat exchanging outlet <NUM>, the air inlet duct <NUM> does not affect the air discharge of the heat exchanging outlet <NUM>.

By arranging the first blower <NUM> adjacent to the ventilation outlet <NUM>, the purification chamber <NUM> discharges the purified fresh air into the room, so as to improve the purification efficiency of the ventilation system, and further lower the possibility that the filter screen <NUM> contaminates the air discharged from the ventilation outlet <NUM>.

Optionally, the first blower <NUM> is arranged between the filter screen <NUM> and the air inlet duct <NUM>, so that more air introduced by the air inlet duct <NUM> can enter the purification chamber <NUM>, and be discharged into the room from the ventilation outlet <NUM> after being purified by the purification chamber <NUM>.

Optionally, first blowers <NUM> are provided at both sides of the filter screen <NUM>, one of the first blowers <NUM> is adjacent to the air inlet duct <NUM>, and the other one is adjacent to the ventilation outlet <NUM>. In such a way, more air can be introduced into the purification chamber <NUM> by the air inlet duct <NUM>, and after the air is purified by the purification chamber <NUM>, the first blower <NUM> adjacent to the ventilation outlet <NUM> can discharge the purified air into the room more efficiently.

The ventilation outlet <NUM> of the ventilation system <NUM> is located at the top of the housing <NUM>. The ventilation outlet <NUM> is also provided with a closing device configured to open or close the ventilation outlet <NUM>, so as to realize the possibility of failure of the ventilation system <NUM> or the air-opening varying component <NUM> caused by the dust accumulation in the ventilation system <NUM> and the air-opening varying component <NUM> when not in use.

The ventilation outlet <NUM> is provided with a first notch <NUM> on a side adjacent to the exterior of the housing <NUM>, and the first notch <NUM> is arranged along a circle of the ventilation outlet <NUM>. The first notch <NUM> is configured to cooperate with the closing device to close the ventilation outlet <NUM>. The closing device includes a baffle <NUM>, a first gear <NUM> and a linkage mechanism. For example, two groups of baffles <NUM> and linkage mechanisms are provided. One end of the linkage mechanism is connected to the baffle <NUM>, and the other end of the linkage mechanism is connected to the first gear <NUM>. A first connecting block <NUM> and a second connecting block <NUM> are provided on a lower side of the baffle <NUM> and spaced apart from each other. The first connecting block <NUM> and the second connecting block <NUM> are rotatably connected to a third linkage <NUM> and a first linkage <NUM> of the linkage mechanism, respectively. The other end of the first linkage <NUM> is rotatably connected to an inner wall of the housing <NUM>. The third linkage <NUM> is configured in an L structure, and one end of the L structure is rotatably connected to the first connecting block <NUM>, while the other end of the L structure is rotatably connected to the inner wall of the housing <NUM>. An end of the third linkage <NUM> away from the first connecting block <NUM> also extends and is provided with a second linkage <NUM>. An end of the second linkage <NUM> away from the third linkage <NUM> is rotatably connected to a fourth linkage <NUM>. The other end of the fourth linkage <NUM> is rotatably connected to a fifth linkage <NUM>, and the other end of the fifth linkage <NUM> is rotatably connected to an outer peripheral wall of the first gear <NUM>. The first gear <NUM> is rotatably arranged on the inner wall of the housing <NUM>. Two first limiting shafts <NUM> are provided above and at a left side of the gear and are spaced apart from each other. The fifth linkage <NUM> is located between the two first limiting shafts <NUM> and reciprocates along with the rotation of the first gear <NUM>. The second connecting block <NUM> is arranged adjacent to an edge of the baffle <NUM>, and the first connecting block <NUM> is arranged on a side of the baffle <NUM> adjacent to the first notch <NUM>.

When in use, the first gear <NUM> is connected to a motor, and the reciprocating rotation of the motor can drive the first gear <NUM> to rotate reciprocally, which in turn drives the linkage mechanism to operate. Thus, the linkage mechanism can move the baffle <NUM> upwards from the first notch <NUM>, such that the baffle <NUM> opens the ventilation outlet <NUM> and makes it usable. The motor is connected to the controller, and when the ventilation system starts, the motor is also started and drives the baffle <NUM> to open the ventilation outlet <NUM>, so as to realize the purpose of outputting fresh air.

The specific working process is illustrated in <FIG>. When the first gear <NUM> rotates forward, two fifth linkages <NUM> connected to the first gear <NUM> rotate clockwise along with the first gear <NUM>, and brings the fifth linkage <NUM> on the left side to move upwards and rightwards. The fifth linkage <NUM> drives the second linkage <NUM> to rotate anticlockwise around a rotating shaft provided on the inner wall of the housing, and at this time, the third linkage <NUM> will rotate anticlockwise as well, so as to jack up the baffle <NUM>. That is, the baffle <NUM> can be lifted upwards. Since the third linkage <NUM> is of the L structure, the L structure can move the baffle <NUM> leftwards when jacking up the baffle <NUM>, such that the ventilation outlet <NUM> can be fully opened. When the first gear <NUM> rotates forward, the linkage mechanism symmetrically arranged on the right side is driven to move in an opposite direction to the linkage mechanism on the left side, such that both baffles <NUM> can open the ventilation outlet <NUM>. When the first gear <NUM> rotates reversely, the ventilation outlet <NUM> can be closed.

The air-opening varying component <NUM> includes: a gear ring <NUM>, a first connecting disc <NUM>, a second connecting disc <NUM> and an air opening regulating mechanism. A ventilation outlet regulating port is provided in a center of the first connecting disc <NUM>. The air opening regulating mechanism is arranged between the gear ring <NUM> and the first connecting disc <NUM>. An outer side of the first connecting disc <NUM> is connected with the inner wall of the housing. The air opening regulating mechanism includes a plurality of regulating plates <NUM>, and in the embodiment, there are at least nine regulating plates <NUM> that are evenly arranged around a center of the ventilation outlet regulating port. A first end of the regulating plate <NUM> located at the ventilation outlet regulating port is configured as an inclined surface. The inclined surface of each regulating plate abuts against a side wall of the adjacent regulating plate <NUM>. A second groove <NUM> of a U-shaped structure is provided in a second end of the regulating plate <NUM> away from the inclined surface. An inner ring of the gear ring <NUM> is fitted over the second connecting disc <NUM>, and a first side of the second connecting disc <NUM> away from the regulating plate <NUM> is supported on the inner wall of the housing by a bracket <NUM>. There are a plurality of brackets <NUM> spaced apart on the second connecting disc <NUM>. A second side of the second connecting disc <NUM> adjacent to the regulating plate <NUM> is evenly provided with a plurality of fourth limiting shafts <NUM>. The first end of the regulating plate <NUM> adjacent to the inclined surface is provided with a third groove <NUM>, and the third groove <NUM> is configured for the reciprocating movement of the fourth limiting shaft <NUM>. The opening directions of the second groove <NUM> and the third groove <NUM> are both configured to extend along a length direction of the regulating plate <NUM>. There are a plurality of first grooves <NUM> evenly arranged in the first connecting disc <NUM>. The regulating plate <NUM> is provided with a second limiting shaft <NUM>, and the second limiting shaft <NUM> reciprocates in the first groove <NUM>. The first groove <NUM> is obliquely arranged, and an angle of inclination is consistent with the inclined surface of the regulating plate <NUM>.

A side of the gear ring <NUM> adjacent to the regulating plate <NUM> is provided with a third limiting shaft <NUM>, and the third limiting shaft <NUM> reciprocates in the second groove <NUM>.

When in use, the gear ring <NUM> engages with the outer peripheral wall of the first gear <NUM>, and the movement of the first gear <NUM> can bring the air-opening varying component <NUM> to move along, so as to enable the closing device to be opened or closed. Meanwhile, the air-opening varying component <NUM> can be started to regulate the size of the ventilation outlet <NUM>. In order to drive the air-opening varying component <NUM> separately, the gear ring <NUM> may be separately connected to a driving device to be driven. Both the driving device and the motor are connected with the controller, so as to realize a purpose of activating the driving device and the motor for operation by the controller.

Claim 1:
A ventilation and air conditioning system comprising:
a housing (<NUM>);
a ventilation and air conditioning body comprising a ventilation system (<NUM>) and a heat exchanging system (<NUM>); and
an air-opening varying component (<NUM>) provided at a ventilation outlet (<NUM>) of the ventilation system (<NUM>),
wherein the ventilation system (<NUM>) and the heat exchanging system (<NUM>) are arranged in the housing (<NUM>), and a partition board (<NUM>) is provided between the ventilation system (<NUM>) and the heat exchanging system (<NUM>);
the ventilation system (<NUM>) has a first end configured as the ventilation outlet (<NUM>) and a second end configured as a ventilation inlet (<NUM>); and
a heat exchanging inlet (<NUM>) of the heat exchanging system (<NUM>) and the ventilation outlet (<NUM>) of the ventilation system (<NUM>) are on a common surface of the housing (<NUM>),
wherein a heat exchanging unit (<NUM>) is provided between the heat exchanging inlet (<NUM>) and a heat exchanging outlet (<NUM>) of the heat exchanging system (<NUM>);
the heat exchanging outlet (<NUM>) of the heat exchanging system (<NUM>) is provided with an air inlet duct (<NUM>); the air inlet duct (<NUM>) leads to the ventilation inlet (<NUM>) at a first end, and a second end of the air inlet duct (<NUM>) is connected with a purification chamber (<NUM>); and
the ventilation outlet (<NUM>) runs through the housing (<NUM>) and is in connection with an exterior of the housing (<NUM>),
characterized in that
the air inlet duct (<NUM>) runs through the partition board (<NUM>) and passes through the heat exchanging outlet (<NUM>).