WO2021159933A1

WO2021159933A1 - Operation control method for total-heat fresh air ventilator

Info

Publication number: WO2021159933A1
Application number: PCT/CN2021/072822
Authority: WO
Inventors: 蔡艳芳; 朱立荣; 张中晓
Original assignee: 青岛海尔空调电子有限公司; 海尔智家股份有限公司
Priority date: 2020-02-12
Filing date: 2021-01-20
Publication date: 2021-08-19
Also published as: CN113251592A

Abstract

Provided is an operation control method for a total-heat fresh air ventilator. The operation control method comprises: acquiring an indoor and outdoor temperature difference value and indoor and outdoor air quality parameters; comparing the indoor and outdoor temperature difference value with a preset temperature threshold value; according to a comparison result between the indoor and outdoor temperature difference value and the preset temperature threshold value, selectively comparing the indoor and outdoor air quality parameters with preset parameters; and according to comparison results between the indoor and outdoor air quality parameters and the preset parameters, selectively opening or closing a first ventilation door and/or a second ventilation door and turning on or turning off a first fan and/or a second fan. An appropriate operation mode can be selected according to the specific situations of indoor and outdoor environments, thereby improving the working efficiency of the fresh air ventilator, and reducing the energy consumption of the fresh air ventilator.

Description

Operation control method of full heat fresh air blower

Technical field

The present invention relates to the technical field of a full-heat fresh air blower, in particular to an operation control method of a full-heat fresh air blower.

Background technique

With the improvement of people's living standards, the requirements for the air quality of the indoor environment are getting higher and higher, and new fans that can purify the outdoor fresh air and introduce it into the room to update the indoor air have emerged. There are many types of fresh air blowers on the market. If there are fresh air blowers that can only bring in fresh air, this type of fresh air blower has a simple structure but a single function; there are full heat fresh air blowers that can exchange heat with the indoor return air, such fresh air blowers. It can recover the heat in the indoor air and avoid rapid changes in indoor temperature.

Although the existing all-heat fresh air blower can realize heat recovery, it cannot adapt the operation mode based on the specific conditions of the indoor and outdoor environment, which causes the problems of low work efficiency and high energy consumption, and reduces the user experience.

Correspondingly, there is a need for a new operation control method of all-heat fresh air blowers in the art to solve the above-mentioned problems.

Summary of the invention

In order to solve the above-mentioned problems in the prior art, that is, to solve the problems of low working efficiency and high energy consumption of existing fresh air blowers, the present invention provides an operation control method of a full-heat fresh air blower, which is characterized in that: The hot fresh air fan includes: a fresh air duct, which connects the outdoor air inlet and the indoor air outlet; a return air duct, which connects the indoor air inlet and the outdoor air outlet, and a first damper is arranged in the return air duct, and the first damper Used to connect or close the return air duct; a full-heat heat exchange core, which includes a fresh air duct and a return air duct capable of heat exchange, the fresh air duct is arranged in the fresh air duct or constitutes the fresh air The return air channel is arranged in the return air channel or constitutes a part of the return air channel to realize the full heat exchange between fresh air and return air; a side air channel, which is connected to the indoor air inlet Communicating with the outdoor air outlet, a second damper for connecting or closing the side air passage is arranged in the side air passage, and the side air passage is arranged on the periphery of the total heat heat exchange core; A fan is arranged at the outdoor air outlet to drive the air flow in the return air duct; a second fan is arranged at the indoor air outlet to drive the air flow in the fresh air duct,

The operation control method includes:

Obtain indoor and outdoor temperature difference and indoor and outdoor air quality parameters;

Comparing the indoor and outdoor temperature difference with a preset temperature threshold;

Selectively comparing the indoor and outdoor air quality parameters with the preset parameters according to the comparison result of the indoor and outdoor temperature difference and the preset temperature threshold;

According to the comparison result of the indoor and outdoor air quality parameters and the preset parameters, selectively open or close the first damper and/or the second damper and the first fan and/or the second fan Fan.

In the preferred technical solution of the operation control method of the above-mentioned all-heat fresh air blower, the indoor and outdoor air quality parameters include indoor air quality parameters and outdoor air quality parameters, and the preset parameters include preset indoor parameters and preset outdoor parameters,

The step of "selectively comparing the indoor and outdoor air quality parameters with preset parameters" specifically includes:

If the indoor and outdoor temperature difference is higher than the preset temperature threshold, compare the indoor air quality parameter with the preset indoor parameter; and/or

If the indoor and outdoor temperature difference is lower than the preset temperature threshold, comparing the outdoor air quality parameter with the preset outdoor parameter.

In the preferred technical solution of the operation control method of the above-mentioned all-heat fresh air blower, the indoor air quality parameters include indoor CO2 concentration, indoor PM2.5 concentration, and indoor formaldehyde concentration; the outdoor air quality parameters include outdoor CO2 concentration and outdoor PM2. .5 Concentration.

In the preferred technical solution of the operation control method of the above-mentioned all-heat fresh air blower, "selectively open or close the first air door and/or the second air door and the first fan and/or the second fan "The steps specifically include:

If at least one of the indoor air quality parameters is higher than the preset indoor parameter, open the first damper, close the second damper, and make the first fan and the second fan operate at the same Rotation speed, so that the fresh air blower runs in full heat mode.

If all the parameters in the indoor air quality parameters are lower than the preset indoor parameters, the first air door is opened, the second air door is closed, and the speed of the first fan is lower than the second air door. The speed of the fan, so that the fresh fan runs in a slightly positive pressure mode.

If all the parameters in the outdoor air quality parameters are higher than the preset outdoor parameters, simultaneously close the first damper and the second damper, and close the first fan and open the second fan , So that the fresh air blower operates in internal circulation mode.

If at least one of the outdoor air quality parameters is lower than the preset outdoor parameter, close the first damper and open the second damper, and make the first fan and the second fan operate at the same Or run at different speeds, so that the fresh air blower runs in bypass mode.

If at least one of the outdoor air quality parameters is lower than the preset outdoor parameter, opening the first damper and closing the second damper, and closing the first fan and opening the second fan, Thus, the fresh air blower is operated in the fresh air mode.

In the preferred technical solution of the operation control method of the above-mentioned all-heat fresh air blower, the fresh air blower further includes an air quality detection device and a temperature detection device, and the step of "acquiring the difference between indoor and outdoor temperature and indoor and outdoor air quality parameters" specifically includes:

Obtain the indoor and outdoor air quality parameters measured by the air quality detection device and the indoor and outdoor temperature difference measured by the temperature detection device.

In the preferred technical solution of the operation control method of the above-mentioned all-heat fresh air blower, the indoor and outdoor temperature difference is a temperature difference with a change rate of less than 10% within a set time.

The all-heat fresh air blower provided by the present invention is provided by arranging a side ventilation duct on the periphery of the full-heat heat exchange core, and a first damper is arranged in the return air duct, and a second damper is arranged in the side air duct, with the help of the first damper and the second damper. The opening and closing of the damper can switch the air duct, which can accurately control the flow direction of the return air, avoid mutual interference between the air ducts, and avoid the phenomenon of return air diversion, thereby improving the control accuracy of the fresh air blower in different operating modes. Based on the operation control method implemented by the structure of the all-heat fresh air blower in the present invention, firstly, it is judged whether the fresh air blower needs to perform full heat exchange by comparing the difference between indoor and outdoor temperature and a preset temperature threshold, so as to realize the primary selection of the operation mode, and then Based on the results of the preliminary selection, the comparison method between indoor and outdoor air quality parameters and preset parameters is selected, and the preliminary selected operation mode is further selected accurately, so that a suitable operation mode can be selected according to the specific conditions of the indoor and outdoor environment, and the fresh air fan is improved. The work efficiency can quickly create a comfortable indoor environment for users, and it also avoids the problem of high energy consumption caused by the existing new fans operating out of the actual environment, thereby effectively improving the user experience.

Further, when the indoor and outdoor temperature difference is higher than the preset temperature threshold, it can be determined that the full heat exchange of fresh air and return air is required to achieve the primary selection of the operation mode, and then the indoor air quality parameters are compared with the preset indoor air quality parameters by selection. The parameters are compared to determine the path that the return air needs to circulate, so as to realize the final selection of the operation mode, and then realize the purpose of accurately selecting the operation mode of the fresh air blower based on the specific conditions of the indoor and outdoor environment, so as to improve the working efficiency of the fresh air blower and reduce the fresh air blower Energy consumption. When the indoor and outdoor temperature difference is lower than the preset temperature threshold, it can be determined that the fresh air and the return air do not need full heat exchange, and the return air does not need to pass through the return air duct, so as to realize the initial selection of the operating mode, and then pass the The outdoor air quality parameters are compared with the preset outdoor parameters to evaluate the outdoor air quality, and further determine the path that fresh air needs to circulate, so as to realize the final selection of the operation mode, and then realize the accurate selection of the operation mode of the fresh air blower based on the specific conditions of the indoor and outdoor environment Purpose.

Further, when at least one of the indoor air quality parameters is higher than the preset indoor parameters, the full heat mode is selected, that is, the first air door is opened, the second air door is closed, and the first fan and the second fan are operated at the same speed. Running the full heat mode can make full use of the heat energy in the return air to reduce the impact of outdoor fresh air on indoor temperature and avoid unnecessary energy consumption.

Further, when all the indoor air quality parameters are lower than the preset indoor parameters, select the slightly positive pressure mode, which can reduce the impact of outdoor fresh air on the indoor temperature and further prevent dust and impurities in the outdoor air. Wait to enter the room to reduce the cost of air purification.

Furthermore, when all the parameters in the outdoor air quality parameters are higher than the preset outdoor parameters, the internal circulation mode is selected, which can reduce the workload of the fresh air blower, save energy consumption, and prolong the service life of the full heat exchange core.

Further, when at least one of the outdoor air quality parameters is lower than the preset outdoor parameters, the bypass mode is selected, and unnecessary processing of the return air can be avoided without the need for heat exchange between the fresh air and the return air, thereby reducing The small wind resistance during the discharge process of the return air improves the efficiency of the return air discharge; in addition, by closing the first air door to cut off the return air duct, part of the return air can be prevented from being diverted into the return air duct before passing into the bypass air duct. Realize the precise control of the fresh air blower.

Furthermore, when at least one of the outdoor air quality parameters is lower than the preset outdoor parameters, the fresh air mode is selected, which can reduce the cost of fresh air purification, and can also bring the indoor air into a slightly positive pressure state to achieve the discharge of return air through windows, etc. Avoid turning on the first fan to drive the return air to discharge, thereby reducing the energy consumption of the new fan.

Furthermore, by using an external air quality detection device and a temperature detection device, the detection accuracy of the data can be improved, which is helpful for the accurate judgment of the operation mode of the fresh air blower.

Further, by selecting the temperature difference with a change rate of less than 10% within a set time as the data for comparison with the preset temperature threshold, it is possible to avoid selecting the operating mode when the indoor and outdoor temperature difference changes greatly. Thereby reducing the misjudgment rate and realizing the new fan.

Description of the drawings

The following describes the all-heat fresh air blower of the present invention and its operation control method with reference to the accompanying drawings. In the accompanying drawings:

Figure 1 is a schematic diagram of the external structure of the all-heat fresh air blower of the present invention;

Figure 2 is a schematic diagram of the internal structure of the all-heat fresh air blower of the present invention;

Figure 3 is a schematic structural diagram of the skeleton of the all-heat fresh air blower of the present invention;

Fig. 4 is a schematic cross-sectional view along the A-A direction in Fig. 3;

Fig. 5 is a logical block diagram of the operation control method of the all-heat fresh air blower of the present invention;

Fig. 6 is a schematic flow chart of the operation control method of the all-heat fresh air blower of the present invention;

FIG. 7 is a schematic diagram of the air flow state of the all-heat fresh air blower of the present invention in the all-heat mode;

Fig. 8 is a schematic diagram of the air flow state of the all-heat fresh air blower of the present invention in the bypass mode;

Fig. 9 is a schematic diagram of the air flow state of the all-heat fresh air blower of the present invention in the internal circulation mode;

Fig. 10 is a schematic diagram of the airflow state of the all-heat fresh air blower of the present invention in the fresh air mode;

Figure 11 is a diagram of the airflow state of the all-heat fresh air blower of the present invention in the exhaust mode;

List of reference signs:

1. Full heat fresh air blower; 11. Top cover; 12. Frame; 121. Outdoor air inlet; 122. Outdoor air outlet; 123. Indoor air inlet; 124. Indoor air outlet; 125. Installation position of full heat heat exchange core; 1251, return air outlet; 1252, fresh air inlet; 1253, fresh air outlet; 1254, return air inlet; 126, side ventilation duct; 127, upper passage; 128, lower passage; 13, bottom plate; 14, purification module; 141, section One filter; 142, the second filter; 143, the third filter; 144, the formaldehyde removal module; 145, the fourth filter; 146, the sterilization module; 15, the full heat heat exchange core; 16, the fan; 161, The first fan; 162, the second fan; 17, the third damper; 18, the first damper; 19, the second damper.

Detailed ways

The preferred embodiments of the present invention will be described below with reference to the drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention.

In addition, in order to better illustrate the present invention, numerous specific details are given in the following specific embodiments. Those skilled in the art should understand that the present invention can also be implemented without certain specific details. In some examples, the heat exchange principle and internal structure of the full-heat heat exchange core well known to those skilled in the art have not been described in detail in order to highlight the gist of the present invention.

It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The term of the indicated direction or positional relationship is based on the direction or positional relationship shown in the drawings, which is only for ease of description, and does not indicate or imply that the device or element must have a specific orientation, be configured and operated in a specific orientation Therefore, it cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", and "fourth" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

In addition, it should be noted that, in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, they can be fixed or fixed. It is a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those skilled in the art, the specific meaning of the above-mentioned terms in the present invention can be understood according to specific circumstances.

Based on the problems of low working efficiency and high energy consumption of existing fresh air fans pointed out in the background art, the present invention provides an operation control method for all-heat fresh air fans, which aims to select a suitable operation mode based on the specific conditions of indoor and outdoor environments. In order to improve the working efficiency of the fresh air blower and reduce the energy consumption of the fresh air blower, thereby enhancing the user experience.

1 to 11, Figure 1 is a schematic diagram of the external structure of the all-heat fresh fan of the present invention; Figure 2 is a schematic diagram of the internal structure of the all-heat fresh fan of the present invention; Figure 3 is the skeleton of the all-heat fresh fan of the present invention Schematic diagram of the structure; FIG. 4 is a schematic cross-sectional view along the AA direction in FIG. 3; FIG. 5 is a logical block diagram of the operation control method of the all-heat fresh air blower of the present invention; Fig. 7 is a schematic diagram of the airflow state of the all-heat fresh air blower of the present invention in the full-heat mode; Fig. 8 is a schematic diagram of the airflow state of the all-heat fresh air blower of the present invention in the bypass mode; Fig. 9 is the all-heat fresh air blower of the present invention A schematic diagram of the airflow state in the internal circulation mode; FIG. 10 is a schematic diagram of the airflow state of the all-heat fresh air blower of the present invention in the fresh air mode; FIG. 11 is a diagram of the airflow state of the all-heat fresh air blower of the present invention in the exhaust mode.

The structure of the all-heat fresh air blower in the present invention will be described in detail below with reference to Figs. 1 to 4.

First, referring to Figures 1 to 3, the all-heat fresh air blower 1 provided by the present invention includes a basic structure composed of a top cover 11, a skeleton 12, a bottom plate 13, etc. The top plate is connected to the top surface of the skeleton 12, and the bottom plate 13 is connected to the frame 12 On the bottom surface, the bottom plate 13 is provided with bolt seat holes to facilitate the installation of the new fan. During installation, the bottom plate 13 of the new fan faces the surface to be installed, such as the indoor top wall or side wall. A fresh air duct and a return air duct are formed inside the full-heat fresh air blower 1, and are equipped with a fan 16, a full-heat heat exchange core 15, a purification module 14, and the like. The fresh air duct connects the outdoor air inlet 121 and the indoor air outlet 124 to send outdoor fresh air into the room; the return air duct connects the indoor air inlet 123 and the outdoor air outlet 122 to discharge indoor return air to the outdoors. The fan is used to drive the air in the air duct to circulate to form an air flow. Referring to FIG. 2, the fan 16 in this embodiment includes a first fan 161 and a second fan 162. The first fan 161 is arranged at the outdoor air outlet 122 to drive the air in the return air duct. The second fan 162 is arranged at the indoor air outlet 124 to drive the air flow in the fresh air duct. The speed of the first fan 161 and the second fan 162 can be adjusted.

The full heat exchange core 15 is used to realize the heat exchange between the fresh air and the return air. There are many types of structures of the total heat exchange core 15, the most commonly used are cross flow and cross counter flow. In addition, the required channel form can be constructed by the combination of multiple heat exchange cores. Since the structure and working principle of the full heat heat exchange core 15 are relatively mature existing technologies, the internal structure and working principle of the full heat heat exchange core 15 are not described in detail in this embodiment. The total heat exchange core 15 used in this embodiment is a cross-counterflow total heat exchange core 15. With reference to Figures 1 and 3, the cross-counterflow total heat exchange core 15 has a regular hexagonal cross section and is installed in The full-heat heat exchange core formed on the frame 12 is mounted on the mounting position 125. A fresh air channel and a return air channel are formed inside the total heat heat exchange core 15. The fresh air channel is arranged in the fresh air channel or constitutes a part of the fresh air channel, and the return air channel is arranged in the return air channel or constitutes a part of the return air channel. For the convenience of description, in this embodiment, the fresh air inlet and fresh air outlet formed on the fresh air channel, and the fresh air inlet 1252 and fresh air outlet 1253 formed at the full heat exchanger core installation position 125 are called fresh air inlet 1252 and fresh air outlet. 1253, the return air inlet and the return air outlet formed on the return air channel, and the return air inlet 1254 and the return air outlet 1251 formed at the installation position 125 of the total heat exchanger core are all called the return air inlet 1254 and the return air outlet 1251 .

The purification module 14 is used to realize the purification of the fresh air and the return air. With reference to Figures 1 to 3, the purification module 14 in this embodiment includes a first purification module and a second purification module. The first purification module includes a first filter 141 and a second filter 142 arranged upstream of the fresh air duct. And a formaldehyde removal module 144, a fourth filter 145, and a sterilization module arranged downstream of the fresh air duct. The second purification module includes a third filter 143 arranged upstream of the return air duct.

Referring to Figure 3, the ventilation path of the fresh air duct is: outdoor fresh air enters the upstream of the fresh air duct from the outdoor air inlet 121, is initially filtered by the first filter 141 and the second filter 142, and then enters the full heat exchange from the fresh air inlet 1252 The fresh air passage of the hot core 15 enters the upper passage 127 from the fresh air outlet 1253. The upper passage 127 is further purified by the formaldehyde removal module 144 and the fourth filter 145, and then sterilized by the sterilization module 146 and enters the room from the indoor air outlet 124. The ventilation path of the return air duct is: indoor return air enters the upstream of the return air duct from the indoor air inlet 123, then enters the lower channel 128, and enters the return air after being filtered by the third filter 143 set at the return air inlet 1254 In the channel, it enters the downstream of the return air duct through the return air outlet 1251, and finally exhausts to the outdoors through the outdoor air outlet 122. 4, a first damper 18 is provided in the lower passage 128 located in the return air duct, and the first damper 18 is used to connect or close the return air duct.

The full-heat fresh air fan 1 is also provided with a side ventilation duct 126 which is connected to the indoor air inlet 123 and the outdoor air outlet 122. Referring to FIG. 4, a second damper 19 for connecting or closing the bypass duct 126 is provided in the bypass duct 126, and the bypass duct 126 is arranged on the periphery of the total heat exchange core 15. It should be noted that the “peripheral” in the present invention means that the azimuth side ventilation duct 126 is provided on the outside of the total heat exchange core 15 according to the top view of FIG. 3.

In the present invention, the air entering through the outdoor air inlet 121 is called fresh air, and the air entering through the indoor air inlet 123 is called return air.

Hereinafter, the operation control method of the all-heat fresh air blower provided by the present invention will be described in detail with reference to FIGS. 5 to 11.

5, the operation control method of the all-heat fresh air blower provided by the present invention includes:

S10. Obtain indoor and outdoor temperature differences and indoor and outdoor air quality parameters. Specifically, the fresh air blower includes an air quality detection device and a temperature detection device. The air quality detection device can be an external type or a built-in type, preferably an external air quality detection device, for example, by electrically connecting a dedicated air quality detection device Or it is connected to the control board of the fresh air blower by communication to obtain the indoor and outdoor air quality parameters measured by the air quality detection device. In the same way, the temperature detection device may also be a built-in or an external type, preferably a built-in type. The indoor and outdoor temperature difference obtained in this embodiment is the indoor and outdoor temperature difference measured by the temperature detection device. When obtaining the indoor and outdoor temperature difference, only when the change rate of the indoor and outdoor temperature difference is less than 10% within the set time, can the acquired data be fed back to the all-hot fresh air fan, for example, the temperature difference obtained within 10 minutes The temperature difference can be fed back to the fresh air blower when the change of the temperature does not exceed 10%, so that the fresh air blower can select an appropriate operation mode based on a stable operating environment, which is beneficial to realize the accurate control of the fresh air blower.

S20. Compare the indoor and outdoor temperature difference with a preset temperature threshold. Specifically, the preset temperature threshold may be determined experimentally in the experimental stage, for example, set to 3° C. or other suitable temperature values. The setting of the preset temperature threshold can be determined by comparing the heat exchange cost of the fresh air and the return air with the cost of heating or cooling the room, which is completed in the experimental stage.

S30. Selectively compare the indoor and outdoor air quality parameters with the preset parameters according to the comparison result of the indoor and outdoor temperature difference and the preset temperature threshold. Specifically, the indoor and outdoor air quality parameters include indoor air quality parameters and outdoor air quality parameters, and the preset parameters include preset indoor parameters and preset outdoor parameters. Indoor air quality parameters include indoor CO2 concentration, indoor PM2.5 concentration and indoor formaldehyde concentration; outdoor air quality parameters include outdoor CO2 concentration and outdoor PM2.5 concentration; preset indoor parameters include preset indoor CO2 concentration and preset indoor PM2. 5 Concentration and preset indoor formaldehyde concentration; preset outdoor parameters include preset outdoor CO2 concentration and preset outdoor PM2.5 concentration. The specific parameter setting can be determined according to industry standards or experimental determination.

There are two comparison results between the indoor and outdoor temperature difference and the preset temperature threshold: the indoor and outdoor temperature difference is higher than the preset temperature threshold, or if the indoor and outdoor temperature difference is lower than the preset temperature threshold. If the indoor and outdoor temperature difference is higher than the preset temperature threshold, it indicates that the fresh air and the return air need to be heat exchanged to recover the heat in the return air and reduce the degree of influence of the fresh air on the indoor temperature. The heat exchange core 15 can be preliminarily determined to be operated in the slightly positive pressure mode or the full heat mode in this situation, and then the indoor air quality parameters can be compared with the preset indoor parameters to finally determine whether to choose the slightly positive pressure mode or the full heat mode. Select full heat mode. If the difference between indoor and outdoor temperature is lower than the preset temperature threshold, it means that even if the fresh air does not recover the heat in the return air, it will not have a significant impact on the indoor temperature. In this case, the return air does not need to pass through the full heat exchange core 15. The return air channel can be disconnected during the operation of the fresh air blower. At this time, the operation mode of the fresh air blower can be finally determined by comparing the outdoor air quality parameters with the preset outdoor parameters.

S40: According to the comparison result of the indoor and outdoor air quality parameters and the preset parameters, selectively open or close the first air door and/or the second air door and the first fan and/or the second fan.

Specifically, referring to Figures 6 and 7, if at least one of the indoor air quality parameters is higher than the preset indoor parameters, the fresh air blower is controlled to perform the following operations: open the first damper 18 to connect the return air duct, and close the second The damper 19 disconnects the side air duct 126 and makes the first fan 161 and the second fan 162 run at the same speed, so that the fresh air blower operates in the full heat mode, and the air flow path is shown in FIG. 7.

If all the parameters in the indoor air quality parameters are lower than the preset indoor parameters, the new fan is controlled to perform the following operations: open the first damper 18 to connect the return air duct, and close the second damper 19 to disconnect the bypass air duct 126 , And the rotation speed of the first fan 161 is lower than the rotation speed of the second fan 162, so that the fresh air and the return air have a certain speed difference, so that the fresh air fan can operate in a slightly positive pressure mode. In the slightly positive pressure mode, dust in the outdoor air can be prevented from entering the room through the window. The opening and closing situation of the damper in the slightly positive pressure mode is the same as that in the full heat mode, but the difference is the speed of the fan. Therefore, the air flow path can also be referred to as shown in FIG. 7.

If all the parameters in the outdoor air quality parameters are higher than the preset outdoor parameters, the cost of fresh air purification is higher. At this time, the fresh air fan can be controlled to perform the following operations: simultaneously closing the first air door 18 and the second air door 19, and closing the first air door 18 and the second air door 19 at the same time. A fan 161 and the second fan 162 are opened, and the third damper 17 is opened, so that the indoor return air enters the upper air duct from the indoor air inlet 123 and is discharged through the indoor air outlet 124, so that the fresh air blower operates in internal circulation mode. The filter 143 and the formaldehyde removal module 144 realize the self-purification of indoor air, and the airflow path is shown in FIG. 9. It should be noted that, except for the internal circulation mode, the third damper 17 is in the closed state in other working modes. 3, the third air door 17 includes a door frame and a door panel. When the door panel is in the P working position, it means that the third air door 17 is closed. When the door panel is in the Q working position, it means that the third air door 17 is opened. The door panel is driven by a micro motor.

If at least one of the outdoor air quality parameters is lower than the preset outdoor parameters, the cost of fresh air purification is relatively low. At this time, fresh air can be introduced, and the return air can be directly discharged or discharged through the window without treatment. The fresh air causes the indoor air pressure to change quickly. The indoor return air is preferably discharged by a fresh air blower. At this time, the fresh air blower can be controlled to perform the following operations: close the first air door 18 to disconnect the return air duct, and open the second air door 19 to open the side ventilation The passage 126 and the first fan 161 and the second fan 162 are operated at the same or different rotation speeds, so that the fresh fan operates in the bypass mode. In the bypass mode, since the first air door 18 is closed, the return air will not be diverted into the return air duct but can all enter the bypass air duct 126, thereby improving the control accuracy of the fresh air blower. Refer to Figure 8 for the air flow path in the bypass mode.

Alternatively, in order to reduce the energy consumption of the fresh air blower, if at least one of the outdoor air quality parameters is lower than the preset outdoor parameter, the return air may not be processed, and the indoor is in a slightly positive pressure state after the fresh air is introduced. , Will promote the indoor air to be discharged from windows, door cracks, etc. At this time, the fresh air fan can be controlled to perform the following operations: open the first air door 18 and close the second air door 19, and close the first fan 161 and open the second fan 162, thereby Make the fresh air blower run in fresh air mode. Alternatively, the first damper 18 and the second damper 19 may be closed, and the first fan 161 and the second fan 162 may be turned off to make the fresh air fan run in the fresh air mode. The air flow state in the fresh air mode is shown in FIG. 10.

The all-heat fresh air fan 1 in the present invention can also be operated in the exhaust mode. When the indoor air quality is poor and needs to be discharged quickly, the exhaust mode can be operated. In this mode, the first damper 18 is closed and the second damper 19 is opened. , Turn on the first fan 161 and turn off the second fan 162, and only connect the bypass air duct 126 to promote the rapid discharge of the return air. Since this mode has fewer application scenarios, it can be executed by manual selection by the user. The airflow status of the exhaust mode Refer to Figure 11.

It should be noted that in Figures 7-11, the black solid arrow indicates the indoor return air, and the hollow arrow indicates the outdoor fresh air.

So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

An operation control method of a full-heat fresh air blower, characterized in that the full-heat fresh air blower comprises: a fresh air duct connected with an outdoor air inlet and an indoor air outlet; a return air duct connected with an indoor air inlet and an outdoor air outlet A first damper is provided in the return air duct, and the first damper is used to connect or close the return air duct; a full heat heat exchange core, which includes a fresh air duct and a return air duct that can exchange heat The fresh air duct is arranged in the fresh air duct or constitutes a part of the fresh air duct, and the return air duct is arranged in the return air duct or constitutes a part of the return air duct, so as to realize the fresh air and The full heat exchange of the return air; a side ventilation duct, which communicates with the indoor air inlet and the outdoor air outlet, the side ventilation duct is provided with a second damper for connecting or closing the side ventilation duct, and The side air duct is arranged on the periphery of the total heat heat exchange core; the first fan is arranged at the outdoor air outlet to drive the air flow in the return air duct; the second fan is arranged in the indoor The air outlet is used to drive the airflow in the fresh air duct to circulate,

The operation control method includes:

Obtain indoor and outdoor temperature difference and indoor and outdoor air quality parameters;

Comparing the indoor and outdoor temperature difference with a preset temperature threshold;

Selectively comparing the indoor and outdoor air quality parameters with the preset parameters according to the comparison result of the indoor and outdoor temperature difference and the preset temperature threshold;

According to the comparison result of the indoor and outdoor air quality parameters and the preset parameters, selectively open or close the first damper and/or the second damper and the first fan and/or the second fan Fan.
The operation control method of the all-heat fresh air blower according to claim 1, wherein the indoor and outdoor air quality parameters include indoor air quality parameters and outdoor air quality parameters, and the preset parameters include preset indoor parameters and preset parameters. Set outdoor parameters,

The step of "selectively comparing the indoor and outdoor air quality parameters with preset parameters" specifically includes:

If the indoor and outdoor temperature difference is higher than the preset temperature threshold, compare the indoor air quality parameter with the preset indoor parameter; and/or

If the indoor and outdoor temperature difference is lower than the preset temperature threshold, the outdoor air quality parameter is compared with the preset outdoor parameter.
The operation control method of an all-heat fresh air blower according to claim 2, wherein the indoor air quality parameters include indoor CO 2 concentration, indoor PM2.5 concentration, and indoor formaldehyde concentration; and the outdoor air quality parameters include outdoor CO 2 concentration and outdoor PM2.5 concentration.
The operation control method of the all-heat fresh air blower according to claim 3, characterized in that "selectively open or close the first air door and/or the second air door and the first fan and/or the The steps of "said the second fan" specifically include:

If at least one of the indoor air quality parameters is higher than the preset indoor parameter, open the first damper, close the second damper, and make the first fan and the second fan operate at the same Rotation speed, so that the fresh air blower runs in full heat mode.
The operation control method of the all-hot fresh air fan according to claim 3 or 4, characterized in that "selectively open or close the first damper and/or the second damper and the first fan and/ Or the steps of "the second fan" specifically include:

If all the parameters in the indoor air quality parameters are lower than the preset indoor parameters, the first air door is opened, the second air door is closed, and the speed of the first fan is lower than the second air door. The speed of the fan, so that the fresh fan runs in a slightly positive pressure mode.
The operation control method of the all-heat fresh air blower according to any one of claims 3 to 5, characterized in that “selectively open or close the first damper and/or the second damper and the first damper The steps of "a fan and/or the second fan" specifically include:

If all the parameters in the outdoor air quality parameters are higher than the preset outdoor parameters, simultaneously close the first damper and the second damper, and close the first fan and open the second fan , So that the fresh air blower operates in internal circulation mode.
The operation control method of the all-heat fresh air blower according to any one of claims 3 to 6, characterized in that “selectively open or close the first damper and/or the second damper and the first damper The steps of "a fan and/or the second fan" specifically include:

If at least one of the outdoor air quality parameters is lower than the preset outdoor parameter, close the first damper and open the second damper, and make the first fan and the second fan operate at the same Or run at different speeds, so that the fresh air blower runs in bypass mode.
The operation control method of the all-heat fresh air blower according to any one of claims 3 to 6, characterized in that “selectively open or close the first damper and/or the second damper and the first damper The steps of "a fan and/or the second fan" specifically include:

If at least one of the outdoor air quality parameters is lower than the preset outdoor parameter, opening the first damper and closing the second damper, and closing the first fan and opening the second fan, Thus, the fresh air blower is operated in the fresh air mode.
The operation control method of the all-hot fresh air blower according to any one of claims 1-8, wherein the fresh air blower further comprises an air quality detection device and a temperature detection device, and "acquires the difference between indoor and outdoor temperature and indoor and outdoor temperature difference". The steps of "air quality parameters" specifically include:

Obtain the indoor and outdoor air quality parameters measured by the air quality detection device and the indoor and outdoor temperature difference measured by the temperature detection device.
The operation control method of an all-heat fresh air blower according to claim 9, wherein the indoor and outdoor temperature difference is a temperature difference with a change rate of less than 10% within a set time.