CN115930358A

CN115930358A - New fan condensation prevention control method and device and new fan

Info

Publication number: CN115930358A
Application number: CN202211425564.0A
Authority: CN
Inventors: 李雯雯; 毛建平; 张玉峰
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2022-11-15
Filing date: 2022-11-15
Publication date: 2023-04-07

Abstract

The invention discloses a fresh air fan condensation prevention control method and device and a fresh air fan. The method comprises the following steps of: judging whether the fresh air fan has condensation risk under the current working condition; and if so, adjusting the air volume of the fresh air fan and/or adjusting the set temperature of the air conditioner according to the current working condition so as to enable the target temperature corresponding to the current working condition to be larger than the dew point temperature corresponding to the current working condition. According to the invention, the air quantity of the fresh air fan is adjusted in time and/or the set temperature of the air conditioner is adjusted, so that accurate control is realized, condensation of the fresh air fan is prevented, the unit is more reliable to operate, and the operating range of the fresh air fan can be widened. The mode of adjusting the air volume of the fresh air fan is adopted, so that indoor ventilation can be ensured to the maximum extent under the condition of avoiding condensation; the mode of adjusting the set temperature of the air conditioner is adopted, and the air conditioner is in linkage control, so that the operational reliability of the fresh air fan is ensured under the condition of ensuring the comfort of a human body.

Description

New fan condensation prevention control method and device and new fan

Technical Field

The invention relates to the technical field of condensation prevention, in particular to a fresh air fan condensation prevention control method and device and a fresh air fan.

Background

With the continuous improvement of the economic development level, the application of the new fan is more and more extensive. Outdoor fresh air and indoor exhaust air entering the fresh air fan are subjected to heat exchange through the heat recovery core body, and heat exchange of indoor air and outdoor air is achieved. In the daily use process of the existing fresh air machine, the indoor air temperature is lower in summer refrigeration, and the outdoor air temperature is lower in winter heating, so that the condensation phenomenon is easy to occur.

Aiming at the problem of condensation of a fresh air fan in the prior art, an effective solution is not provided at present.

Disclosure of Invention

The embodiment of the invention provides a fresh air fan condensation prevention control method and device and a fresh air fan, and at least solves the problem of condensation of the fresh air fan in the prior art.

In order to solve the technical problem, an embodiment of the present invention provides a new fan condensation prevention control method, where outdoor new air and indoor exhaust air exchange heat in a new fan, and the method includes:

judging whether the fresh air fan has condensation risk under the current working condition;

if so, adjusting the air volume of the fresh air fan and/or adjusting the set temperature of the air conditioner according to the current working condition so that the target temperature corresponding to the current working condition is higher than the dew point temperature corresponding to the current working condition.

Optionally, judge whether new fan has condensation risk under current operating mode, include:

under the refrigeration working condition, judging whether the temperature of the discharged air is less than or equal to the dew point temperature of outdoor air, and if so, determining that the fresh air fan has a condensation risk under the refrigeration working condition;

and under the heating condition, judging whether the air outlet temperature of the fresh air is less than or equal to the dew point temperature of the indoor air, and if so, determining that the condensation risk exists in the fresh air fan under the heating condition.

Optionally, adjusting the air volume of the fresh air blower according to the current working condition, so that the target temperature corresponding to the current working condition is greater than the dew point temperature corresponding to the current working condition, including:

under the refrigeration working condition, reducing the air exhaust amount and/or increasing the fresh air amount until the air exhaust and outlet temperature is greater than the dew point temperature of outdoor air;

under the heating condition, the air exhaust amount is increased and/or the fresh air amount is reduced until the fresh air outlet temperature is higher than the dew point temperature of indoor air.

Optionally, under the refrigeration operating mode, reduce the volume of airing exhaust and/or improve the fresh air volume, until the air-out temperature of airing exhaust is greater than outdoor air dew point temperature, include:

under the refrigerating working condition, determining a target value of the exhaust air outlet temperature according to a first preset rule; calculating a target air volume according to the current target value of the air outlet temperature of the air outlet, the air inlet temperature of the air outlet, the fresh air volume, the fresh air inlet temperature and the heat recovery efficiency, or calculating the target fresh air volume according to the current target value of the air outlet temperature of the air outlet, the air inlet temperature of the air outlet, the air volume of the air outlet, the fresh air inlet temperature and the heat recovery efficiency; and adjusting the rotating speed of the air exhaust fan according to the target air exhaust quantity or adjusting the rotating speed of the fresh air fan according to the target fresh air quantity until the air exhaust outlet temperature is higher than the dew point temperature of the outdoor air.

Optionally, under the refrigeration working condition, determining a target value of the exhaust air outlet temperature according to a first preset rule; calculating a target air exhaust quantity according to the target value of the current air exhaust and air outlet temperature, the air exhaust and air inlet temperature, the fresh air quantity, the fresh air inlet temperature and the heat recovery efficiency, or calculating the target fresh air quantity according to the target value of the current air exhaust and air outlet temperature, the air exhaust and air inlet temperature, the air exhaust quantity, the fresh air inlet temperature and the heat recovery efficiency; adjusting the rotating speed of an air exhaust fan according to the target air exhaust amount or adjusting the rotating speed of a fresh air fan according to the target fresh air amount until the air exhaust air temperature is greater than the outdoor air dew point temperature, and the method comprises the following steps:

the target value of the air exhaust and air outlet temperature is equal to the dew point temperature of outdoor air so as to calculate the target air exhaust amount or the target fresh air amount, and the rotating speed of the air exhaust fan is adjusted according to the target air exhaust amount or the rotating speed of the fresh air fan is adjusted according to the target fresh air amount;

after the preset time, acquiring the air outlet temperature of the air outlet again, if the air outlet temperature of the air outlet is still less than or equal to the dew point temperature of the outdoor air, calculating a first difference value between the dew point temperature of the outdoor air and the air outlet temperature of the air outlet, enabling the target value of the air outlet temperature of the air outlet to be equal to the sum of the dew point temperature of the outdoor air and the first difference value, then recalculating the target air outlet quantity or the target fresh air quantity, and readjusting the rotating speed of the air outlet fan or the rotating speed of the fresh air fan;

and then returning to the step of acquiring the air exhaust outlet temperature again after executing the preset time until the air exhaust outlet temperature is greater than the dew point temperature of the outdoor air.

Optionally, the following formula is adopted to calculate the target air exhaust volume or the target fresh air volume:

a＝(Q _P ×T _PJ -Q _P ×T _PC )/(Q _P ×T _PJ -Q _X ×T _XJ )，

wherein a represents heat recovery efficiency, Q _P Indicating the amount of exhaust air, Q _X Indicating fresh air volume, T _XJ Indicating the temperature of the fresh air, T _PJ Indicating the temperature of the inlet air of the exhaust air, T _PC And the exhaust air outlet temperature is shown.

and under the refrigerating working condition, gradually reducing the air exhaust amount and/or increasing the fresh air amount according to a first preset amplitude until the air exhaust outlet temperature is higher than the dew point temperature of the outdoor air.

Optionally, under the heating operating condition, improve the volume of airing exhaust and/or reduce the new trend volume, until new trend air-out temperature is greater than indoor air dew point temperature, include:

under the heating working condition, determining a target value of the outlet air temperature of the fresh air according to a second preset rule; calculating a target air exhaust quantity according to the target value of the current fresh air outlet temperature, the fresh air inlet temperature, the air exhaust inlet temperature, the fresh air quantity and the heat recovery efficiency, or calculating the target fresh air quantity according to the target value of the current fresh air outlet temperature, the fresh air inlet temperature, the air exhaust quantity and the heat recovery efficiency; and adjusting the rotating speed of an exhaust fan according to the target exhaust air quantity or adjusting the rotating speed of a fresh air fan according to the target fresh air quantity until the fresh air outlet temperature is higher than the indoor air dew point temperature.

Optionally, under the heating condition, determining a target value of the fresh air outlet temperature according to a second preset rule; calculating a target air exhaust quantity according to the target value of the current fresh air outlet temperature, the fresh air inlet temperature, the air exhaust inlet temperature, the fresh air quantity and the heat recovery efficiency, or calculating the target fresh air quantity according to the target value of the current fresh air outlet temperature, the fresh air inlet temperature, the air exhaust quantity and the heat recovery efficiency; adjusting the rotating speed of an air exhaust fan according to the target air exhaust amount or adjusting the rotating speed of a fresh air fan according to the target fresh air amount until the fresh air outlet temperature is greater than the indoor air dew point temperature, and the method comprises the following steps:

the target value of the fresh air outlet temperature is equal to the indoor air dew point temperature so as to calculate a target air exhaust quantity or a target fresh air quantity, and the rotating speed of the air exhaust fan is adjusted according to the target air exhaust quantity or the rotating speed of the fresh air fan is adjusted according to the target fresh air quantity;

after the preset time, acquiring a fresh air outlet temperature again, if the fresh air outlet temperature is still less than or equal to the indoor air dew point temperature, calculating a second difference value between the indoor air dew point temperature and the fresh air outlet temperature, enabling a target value of the fresh air outlet temperature to be equal to the sum of the indoor air dew point temperature and the second difference value, then recalculating a target exhaust air volume or a target fresh air volume, and readjusting the rotating speed of an exhaust fan or the rotating speed of a fresh air fan;

and then returning to the step of acquiring the fresh air outlet temperature again after executing the preset time until the fresh air outlet temperature is greater than the indoor air dew point temperature.

a＝(Q _X ×T _XJ -Q _X ×T _XC )/(Q _X ×T _XJ -Q _P ×T _PJ )，

wherein a represents heat recovery efficiency, Q _P Indicating the amount of exhaust air, Q _X Indicating fresh air volume, T _XJ Indicating the temperature of the incoming air, T, of the fresh air _PJ Indicating the temperature of the inlet air of the exhaust air, T _XC And the air outlet temperature of the fresh air is shown.

under the heating condition, the air exhaust amount is increased step by step and/or the fresh air amount is reduced according to a second preset amplitude until the fresh air outlet temperature is higher than the indoor air dew point temperature.

Optionally, adjusting the set temperature of the air conditioner according to the current working condition to make the target temperature corresponding to the current working condition greater than the dew point temperature corresponding to the current working condition, includes:

under the refrigeration working condition, judging whether the set temperature of the air conditioner is smaller than a first temperature limit value or not; if the set air conditioner temperature is lower than the first temperature limit value, the set air conditioner temperature is increased, the exhaust air outlet temperature is obtained again after the preset time, and if the exhaust air outlet temperature is still lower than or equal to the outdoor air dew point temperature, the step of judging whether the set air conditioner temperature is lower than the first temperature limit value is executed again until the exhaust air outlet temperature is higher than the outdoor air dew point temperature; if the set temperature of the air conditioner is not less than the first temperature limit value, the set temperature of the air conditioner is not adjusted;

under the heating condition, judging whether the set temperature of the air conditioner is greater than a second temperature limit value; if the set temperature of the air conditioner is greater than the second temperature limit value, reducing the set temperature of the air conditioner, acquiring the fresh air outlet temperature again after the preset time, and if the fresh air outlet temperature is still less than or equal to the indoor air dew point temperature, returning to the step of judging whether the set temperature of the air conditioner is greater than the second temperature limit value until the fresh air outlet temperature is greater than the indoor air dew point temperature; and if the set temperature of the air conditioner is not greater than the second temperature limit value, not adjusting the set temperature of the air conditioner.

Optionally, adjusting the air volume of the fresh air blower and adjusting the set temperature of the air conditioner according to the current working condition, so that the target temperature corresponding to the current working condition is greater than the dew point temperature corresponding to the current working condition, including:

adjusting the air volume of the fresh air fan according to the current working condition, and adjusting the set temperature of the air conditioner according to the current working condition when a first preset condition is met until the target temperature corresponding to the current working condition is higher than the dew point temperature corresponding to the current working condition; alternatively, the first and second electrodes may be,

and adjusting the set temperature of the air conditioner according to the current working condition, and adjusting the air volume of the fresh air fan according to the current working condition when a second preset condition is met until the target temperature corresponding to the current working condition is higher than the dew point temperature corresponding to the current working condition.

Optionally, the first preset condition includes: adjusting the air volume of the new fan to an allowable air volume limit value, but still having a condensation risk, or adjusting the air volume of the new fan for a first preset time;

the second preset condition comprises: and adjusting the set temperature of the air conditioner to an allowable temperature limit value, wherein the risk of condensation still exists, or the adjusting times of the set temperature of the air conditioner reach a second preset times.

The embodiment of the invention also provides a fresh air fan condensation prevention control device, outdoor fresh air and indoor exhaust air exchange heat in the fresh air fan, and the device comprises:

the judging module is used for judging whether the fresh air fan has condensation risk under the current working condition;

and the control module is used for adjusting the air volume of the fresh air fan and/or adjusting the set temperature of the air conditioner according to the current working condition if the current working condition is met, so that the target temperature corresponding to the current working condition is higher than the dew point temperature corresponding to the current working condition.

An embodiment of the present invention further provides a new fan, including: the embodiment of the invention relates to an anti-condensation control device for a fresh air fan.

Embodiments of the present invention further provide a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the steps of the method according to the embodiments of the present invention.

By applying the technical scheme of the invention, if the fresh air fan has a condensation risk under the current working condition, the air volume of the fresh air fan and/or the set temperature of the air conditioner are/is adjusted according to the current working condition, so that the target temperature corresponding to the current working condition is higher than the dew point temperature corresponding to the current working condition, and the air volume of the fresh air fan and/or the set temperature of the air conditioner are/is adjusted in time, so that the accurate control is realized, the condensation of the fresh air fan is prevented, the unit operation is more reliable, and the operation range of the fresh air fan can be widened. The mode of adjusting the air volume of the fresh air fan is adopted, so that indoor ventilation can be ensured to the maximum extent under the condition of avoiding condensation; the mode of adjusting the set temperature of the air conditioner is adopted, and the air conditioner is in linkage control, so that the operational reliability of the fresh air fan is ensured under the condition of ensuring the comfort of a human body.

Drawings

FIG. 1 is a schematic diagram of heat exchange of an air flow inside a fresh air machine according to an embodiment of the present invention;

fig. 2 is a flowchart of a new fan anti-condensation control method according to an embodiment of the present invention;

FIG. 3 is a flow chart of adjusting the exhaust air volume of the fresh air machine based on a formula to achieve condensation prevention under the refrigeration condition according to the embodiment of the present invention;

FIG. 4 is a flow chart of adjusting the exhaust air volume of the fresh air machine based on a formula to achieve condensation prevention under the heating condition according to the embodiment of the present invention;

FIG. 5 is a flow chart of combining the adjustment of the fresh air exhaust volume and the adjustment of the set temperature of the air conditioner to achieve condensation prevention under the refrigeration condition according to the embodiment of the present invention;

FIG. 6 is a flow chart of combining the adjustment of the exhaust air volume of the fresh air machine and the adjustment of the set temperature of the air conditioner to achieve condensation prevention under the heating working condition according to the embodiment of the present invention;

fig. 7 is a block diagram of a new fan condensation prevention control device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.

Alternative embodiments of the present invention are described in detail below with reference to the accompanying drawings.

The fresh air fan related to the embodiment of the invention is a bidirectional flow fresh air fan, is provided with an independent exhaust pipeline and a fresh air pipeline, is a total heat exchange fresh air fan, and has a heat recovery function, namely outdoor fresh air and indoor exhaust air exchange heat in the fresh air fan.

As shown in fig. 1, the new blower includes: the heat recovery core body 10, the fresh air inlet 20, the fresh air outlet 30, the exhaust air inlet 40 and the exhaust air outlet 50. Indoor air (namely exhaust air) is driven by an exhaust fan to be exhausted to the outside through an exhaust air inlet 40, an exhaust pipeline and an exhaust air outlet 50, and outdoor air (namely fresh air) is driven by a fresh air fan to be sent into the room through a fresh air inlet 20, a fresh air pipeline and a fresh air outlet 30. The indoor and outdoor air is heat-exchanged by the heat recovery core 10. During operation in summer, the fresh air obtains cold from air-conditioning exhaust air, the temperature is reduced, during operation in winter, the fresh air obtains heat from the air-conditioning exhaust air, the temperature is increased, and energy is recovered from the air-conditioning exhaust air through the total heat exchange process of the heat recovery core body 10.

An embodiment of the present invention provides a new fan anti-condensation control method, and fig. 2 is a flowchart of the new fan anti-condensation control method provided by the embodiment of the present invention, as shown in fig. 2, the method includes the following steps:

s201, judging whether the fresh air machine has condensation risk under the current working condition.

And S202, if so, adjusting the air volume of the fresh air fan and/or adjusting the set temperature of the air conditioner according to the current working condition so that the target temperature corresponding to the current working condition is higher than the dew point temperature corresponding to the current working condition.

The working conditions comprise a refrigerating working condition and a heating working condition. The target temperature and the dew point temperature corresponding to different working conditions are different, specifically, condensation is easier to occur on the outdoor side of the unit under the refrigeration working condition, so that the target temperature corresponding to the refrigeration working condition is the exhaust air outlet temperature, and the dew point temperature corresponding to the refrigeration working condition is the outdoor air dew point temperature; the indoor side of the unit is easier to be condensed under the heating working condition, so that the target temperature corresponding to the heating working condition is the fresh air outlet temperature, and the dew point temperature corresponding to the heating working condition is the indoor air dew point temperature.

The air exhaust air-out temperature can be detected through a temperature sensor arranged at the air exhaust outlet 50, and the fresh air-out temperature can be detected through a temperature sensor arranged at the fresh air outlet 30. The outdoor air dew point temperature can be calculated according to outdoor air state parameters, and the outdoor air state parameters comprise: the outdoor air dry bulb temperature and the outdoor air wet bulb temperature, the outdoor air state parameter is the fresh air inlet parameter, and a temperature sensor and a humidity sensor can be arranged at the fresh air inlet 20 to detect the outdoor air state parameter. The dew point temperature of the indoor air can be calculated according to indoor air state parameters, and the indoor air state parameters comprise: the indoor air dry bulb temperature and the indoor air wet bulb temperature, the indoor air state parameter is the air exhaust and air intake parameter, a temperature sensor and a humidity sensor can be arranged at the air exhaust inlet 40 to detect the indoor air state parameter, and the indoor air state parameter detected by the air conditioner can also be directly utilized.

The air quantity of the fresh air fan can be adjusted by adjusting the rotating speed of the fan, specifically, the air exhaust quantity and/or the fresh air quantity of the fresh air fan can be adjusted, and the corresponding relation between the air exhaust quantity and the rotating speed of the air exhaust fan and the corresponding relation between the fresh air quantity and the rotating speed of the fresh air fan are stored in advance. Through the adjustment amount of wind, can change the heat transfer volume, and then change air exhaust air-out temperature and new trend air-out temperature to avoid the new fan condensation to appear. The set temperature of the air conditioner is adjusted, and the air exhaust temperature and the fresh air exhaust temperature can be changed, so that condensation of the fresh air fan is avoided. Meanwhile, the operation range of the fresh air fan can be expanded, for example, the fresh air fan is at about-10 ℃, condensation possibly occurs in the fresh air fan to influence the use effect of the unit, the fresh air fan is generally not recommended to be used at the temperature, the condensation phenomenon of the fresh air fan at-10 ℃ can be avoided through the condensation prevention control means, and the fresh air fan can be normally started to be used, so that the operation range of the fresh air fan is expanded.

In this embodiment, if the new fan has the condensation risk under the current operating mode, then adjust the amount of wind of new fan and/or adjust air conditioner settlement temperature according to the current operating mode to the target temperature that makes the current operating mode correspond is greater than the dew point temperature that the current operating mode corresponds, through adjusting the amount of wind of new fan and/or adjust air conditioner settlement temperature in time, realize accurate control, prevent that the new fan from appearing the condensation, make the unit operation more reliable, can widen the operating range of new fan simultaneously. The mode of adjusting the air volume of the fresh air fan is adopted, so that indoor ventilation can be ensured to the maximum extent under the condition of avoiding condensation; the mode of adjusting the set temperature of the air conditioner is adopted, and the air conditioner is in linkage control, so that the operational reliability of the fresh air fan is ensured under the condition of ensuring the comfort of a human body.

In one embodiment, S201 determines whether there is a condensation risk in the current operating condition of the fresh air machine, including:

under the refrigeration working condition, judging whether the air outlet temperature of the exhaust air is less than or equal to the dew point temperature of outdoor air, if so, determining that the fresh air fan has a condensation risk under the refrigeration working condition;

Whether condensation risk exists in new fan under current operating mode can be confirmed reliably fast through this embodiment to in time adjust, prevent that condensation from taking place. In practical application, the condensation risk can be periodically judged according to a certain time interval, and the condensation risk can be timely found and timely treated.

The embodiment of the invention comprises the following adjusting modes: the following description will be made for (1) adjusting the air volume of the fresh air blower, (2) adjusting the air conditioning set temperature, and (3) adjusting the air volume of the fresh air blower and adjusting the air conditioning set temperature.

(1) Adjusting the air quantity of the fresh air machine

S202, adjusting the air volume of the fresh air fan according to the current working condition to enable the target temperature corresponding to the current working condition to be larger than the dew point temperature corresponding to the current working condition, and the method comprises the following steps:

Under the refrigerating working condition, the outdoor temperature is high, the indoor temperature is low, the temperature of indoor exhaust air is raised after heat exchange through the heat recovery core body, but is still lower than the outdoor temperature, and when the temperature of the exhaust air is less than or equal to the dew point temperature of outdoor air, condensation is easy to occur when outdoor high-temperature air contacts with a low-temperature cold surface. At the moment, the air exhaust amount can be reduced and/or the fresh air amount can be increased, and the heat exchange amount is changed to increase the air exhaust and air outlet temperature, so that the air exhaust and air outlet temperature is higher than the dew point temperature of outdoor air.

Under the heating condition, the outdoor temperature is low, the indoor temperature is high, the temperature of outdoor fresh air is increased after heat exchange through the heat recovery core body, but is still lower than the indoor temperature, and when the outlet air temperature of the fresh air is less than or equal to the dew point temperature of indoor air, condensation is easy to occur when the indoor hot air contacts the surface of the low-temperature unit. At the moment, the air exhaust amount can be increased and/or the fresh air amount can be reduced, and the heat exchange amount is changed to increase the fresh air outlet temperature, so that the fresh air outlet temperature is higher than the indoor air dew point temperature.

According to the dew point temperature that current operating mode corresponds, the amount of wind of new fan is adjusted to this embodiment, changes the heat transfer volume of newly airing exhaust, and then changes the target temperature that current operating mode corresponds to make the target temperature that current operating mode corresponds be greater than the dew point temperature that current operating mode corresponds, furthest guarantees indoor ventilation under the condition of avoiding appearing the condensation.

It should be noted that, if the air volume of the fresh air machine is adjusted to the allowable air volume limit value, but there is still a condensation risk (that is, the target temperature corresponding to the current operating condition is still less than or equal to the dew point temperature corresponding to the current operating condition), at this time, the air volume cannot be continuously adjusted, and other means may be combined to prevent condensation, for example, adjusting the set temperature of the air conditioner.

There are two methods for adjusting the air volume, which will be described below.

1) Formula-based adjustment of air volume

A. Refrigeration working condition

Under the refrigeration operating mode, reduce the volume of airing exhaust and/or improve the fresh air volume, until the air-out temperature of airing exhaust is greater than outdoor air dew point temperature, include: under the refrigerating working condition, determining a target value of the exhaust air outlet temperature according to a first preset rule; calculating a target air exhaust quantity according to the target value of the current air exhaust and air outlet temperature, the air exhaust and air inlet temperature, the fresh air quantity, the fresh air inlet temperature and the heat recovery efficiency, or calculating the target fresh air quantity according to the target value of the current air exhaust and air outlet temperature, the air exhaust and air inlet temperature, the air exhaust quantity, the fresh air inlet temperature and the heat recovery efficiency; and adjusting the rotating speed of the air exhaust fan according to the target air exhaust amount or adjusting the rotating speed of the fresh air fan according to the target fresh air amount until the air exhaust air temperature is higher than the dew point temperature of outdoor air.

In the embodiment, under the refrigeration working condition, the target value of the air exhaust and air outlet temperature is determined, and the target air exhaust amount or the target fresh air amount is calculated according to the target value of the current air exhaust and air outlet temperature and the current values of other parameters, so that the rotating speed of the fan is adjusted, and the air exhaust and air outlet temperature is effectively changed.

Further, under the refrigeration operating mode, reduce the volume of airing exhaust and/or improve the fresh air volume, until the air-out temperature of airing exhaust is greater than outdoor air dew point temperature, include: under the refrigerating working condition, determining a target value of the exhaust air outlet temperature according to a first preset rule; calculating a target air exhaust quantity according to the target value of the current air exhaust and air outlet temperature, the air exhaust and air inlet temperature, the fresh air quantity, the fresh air inlet temperature and the heat recovery efficiency, or calculating the target fresh air quantity according to the target value of the current air exhaust and air outlet temperature, the air exhaust and air inlet temperature, the air exhaust quantity, the fresh air inlet temperature and the heat recovery efficiency; adjust the rotational speed of the fan of airing exhaust according to the target volume of airing exhaust or adjust the rotational speed of new trend fan according to the target volume of fresh air, until the air-out temperature of airing exhaust is greater than outdoor air dew point temperature, include:

the target value of the air exhaust and outlet temperature is equal to the dew point temperature of outdoor air so as to calculate the target air exhaust amount or the target fresh air amount, and the rotating speed of the air exhaust fan is adjusted according to the target air exhaust amount or the rotating speed of the fresh air fan is adjusted according to the target fresh air amount;

and then returning to the step of acquiring the air outlet temperature of the air outlet again after executing the preset time until the air outlet temperature of the air outlet is greater than the dew point temperature of the outdoor air.

This embodiment is through the circulation detection to the air-out temperature of airing exhaust, and the amount of wind is adjusted many times, can guarantee human travelling comfort and realize preventing the condensation.

Specifically, under the cooling condition, the target air discharge amount or the target fresh air amount can be calculated by adopting the following formula:

a＝(Q _P ×T _PJ -Q _P ×T _PC )/(Q _P ×T _PJ -Q _X ×T _XJ )，

wherein a represents heat recovery efficiency, Q _P Indicating the amount of exhaust air, Q _X Indicating fresh air volume, T _XJ Indicating the temperature of the incoming air, T, of the fresh air _PJ Indicating the temperature of the inlet air of the exhaust air, T _PC And the exhaust air outlet temperature is shown.

The heat recovery efficiency formula of the refrigeration working condition introduces the parameter of air volume. When calculating the target air discharge quantity, the expression Q of the air discharge quantity can be derived according to the formula _P ＝Q _X ×(a×T _XJ )/[(a-1)×T _PJ +T _PC ]And substituting the target value of the air outlet temperature of the exhaust air and the current values of the heat recovery efficiency, the fresh air quantity, the fresh air inlet temperature and the air inlet temperature of the exhaust air into the expression to obtain the target air outlet quantity. When calculating the target fresh air volume, the method can be used for calculating the target fresh air volume according to the formulaExpression Q of fresh air output _X ＝Q _P ×[(a-1)×T _PJ +T _PC ]/(a×T _XJ ) And substituting the target value of the air outlet temperature of the exhaust air and the current values of the heat recovery efficiency, the air exhaust quantity, the fresh air inlet temperature and the air inlet temperature of the exhaust air into the expression so as to obtain the target fresh air quantity.

The target air exhaust volume or the target fresh air volume can be reasonably and reliably calculated under the refrigeration working condition based on the formula.

Referring to fig. 3, a flow chart for adjusting the exhaust air volume of the fresh air fan based on a formula to prevent condensation under the refrigeration condition includes the following steps:

s301, running time t. t represents a detection operation period.

S302, detecting the current temperature T of the exhaust air-out dry bulb _PC (i.e. the above-mentioned air-out temperature), and the outdoor air dry bulb temperature T _XJ (i.e. the fresh air inlet temperature) and the outdoor air wet bulb temperature T _JS (namely the temperature of the fresh air inlet wet bulb).

S303, according to T _XJ And T _JS Calculating the dew point temperature T of outdoor air _WL 。

S304, judging whether T is satisfied _PC ≤T _WL . If so, the process proceeds to S305, otherwise, the process returns to S301.

S305, making the target value of the temperature of the air-out dry bulb of the exhaust air equal to T _WL Substituting into formula Q _P ＝Q _X ×(a×T _XJ )/[(a-1)×T _PJ +T _PC ]And calculating to obtain a target air discharge amount so as to reduce the air discharge amount by changing the rotating speed of an air discharge fan according to the target air discharge amount.

S306, after the running time T, the current temperature T of the air exhaust air outlet dry bulb is detected again _PC 。

S307, judging whether T is satisfied _PC ≤T _WL . If yes, the process proceeds to S308, otherwise, the process returns to S301.

S308, let Δ T = T _WL -T _PC Delta T represents a temperature correction value, and the target value of the temperature of the air-out dry bulb of the exhaust air is equal to T _WL +. Δ T, into equation Q _P ＝Q _X ×(a×T _XJ )/[(a-1)×T _PJ +T _PC ]And calculating to obtain a target air discharge amount so as to reduce the air discharge amount by changing the rotating speed of an air discharge fan according to the target air discharge amount. And then returns to S306.

Considering that factors influencing the heat exchange effect are more, after the air conditioner operates for a period of time according to the calculated target air discharge amount, the detected air discharge temperature may not reach the target value, and then the air conditioner needs to perform cyclic detection and continuous correction, so that the detected air discharge temperature is larger than the dew point temperature of outdoor air finally.

B. Heating condition

Under the heating operating condition, improve the volume of airing exhaust and/or reduce the new trend volume of wind, until new trend air-out temperature is greater than indoor air dew point temperature, include: under the heating condition, determining a target value of the fresh air outlet temperature according to a second preset rule; calculating a target air volume according to the current target value of the fresh air outlet temperature, the fresh air inlet temperature, the air outlet inlet temperature, the fresh air volume and the heat recovery efficiency, or calculating the target fresh air volume according to the current target value of the fresh air outlet temperature, the fresh air inlet temperature, the air outlet volume and the heat recovery efficiency; and adjusting the rotating speed of the air exhaust fan according to the target air exhaust amount or adjusting the rotating speed of the fresh air fan according to the target fresh air amount until the fresh air outlet temperature is higher than the indoor air dew point temperature.

In the heating condition, the target value of the fresh air outlet temperature is determined, and the target exhaust air quantity or the target fresh air quantity is calculated according to the target value of the fresh air outlet temperature and the current values of other parameters, so that the rotating speed of the fan is adjusted, and the fresh air outlet temperature is effectively changed.

Further, under the heating condition, improve the volume of airing exhaust and/or reduce the new trend volume, until new trend air-out temperature is greater than indoor air dew point temperature, include: under the heating condition, determining a target value of the fresh air outlet temperature according to a second preset rule; calculating a target air exhaust quantity according to the target value of the current fresh air outlet temperature, the fresh air inlet temperature, the air exhaust inlet temperature, the fresh air quantity and the heat recovery efficiency, or calculating the target fresh air quantity according to the target value of the current fresh air outlet temperature, the fresh air inlet temperature, the air exhaust quantity and the heat recovery efficiency; adjust the rotational speed of the fan of airing exhaust according to the target volume of airing exhaust or adjust the rotational speed of new trend fan according to the target new trend volume of airing exhaust, until new trend air-out temperature is greater than indoor air dew point temperature, include:

the target value of the fresh air outlet temperature is equal to the indoor air dew point temperature so as to calculate the target air exhaust quantity or the target fresh air quantity, and the rotating speed of the air exhaust fan is adjusted according to the target air exhaust quantity or the rotating speed of the fresh air fan is adjusted according to the target fresh air quantity;

after the preset time, acquiring the fresh air outlet temperature again, if the fresh air outlet temperature is still less than or equal to the indoor air dew point temperature, calculating a second difference value between the indoor air dew point temperature and the fresh air outlet temperature, enabling the target value of the fresh air outlet temperature to be equal to the sum of the indoor air dew point temperature and the second difference value, then recalculating the target exhaust air quantity or the target fresh air quantity, and readjusting the rotating speed of the exhaust fan or the rotating speed of the fresh air fan;

This embodiment is through the circulation detection to new trend air-out temperature, and the amount of wind is adjusted many times, can guarantee human travelling comfort and realize preventing the condensation.

Specifically, in the heating condition, the target air discharge amount or the target fresh air amount may be calculated by using the following formula:

a＝(Q _X ×T _XJ -Q _X ×T _XC )/(Q _X ×T _XJ -Q _P ×T _PJ )，

wherein a represents heat recovery efficiency, Q _P Indicating the amount of exhaust air, Q _X Indicating fresh air volume, T _XJ Indicating the temperature of the fresh air, T _PJ Indicating the temperature of the inlet air of the exhaust air, T _XC And the air outlet temperature of the fresh air is shown.

The heat recovery efficiency formula of the heating working condition introduces the parameter of air volume. When calculating the target air discharge quantity, the expression Q of the air discharge quantity can be derived according to the formula _P ＝Q _X ×[(a-1)×T _XJ +T _XC ]/(a×T _PJ ) To supply fresh airThe target value of the air outlet temperature and the current values of the heat recovery efficiency, the fresh air quantity, the fresh air inlet temperature and the air outlet inlet temperature are brought into the expression to obtain the target air outlet quantity. When the target fresh air volume is calculated, the expression Q of the fresh air volume can be derived according to the formula _X ＝Q _P ×(a×T _PJ )/[(a-1)×T _XJ +T _XC ]And substituting the target value of the air outlet temperature of the fresh air and the current values of the heat recovery efficiency, the air exhaust quantity, the air inlet temperature of the fresh air and the air inlet temperature of the air exhaust into the expression so as to obtain the target fresh air quantity.

The target air discharge quantity or the target fresh air quantity can be reasonably and reliably calculated under the heating condition based on the formula.

Referring to fig. 4, a flow chart for adjusting the exhaust air volume of the fresh air fan based on a formula to prevent condensation under the heating working condition includes the following steps:

s401, running time t. t represents a detection operation period.

S402, detecting the current temperature T of the fresh air outlet dry bulb _XC (i.e. the fresh air outlet temperature) and the indoor air dry bulb temperature T _PJ (i.e., the above-mentioned exhaust air intake temperature) and the indoor air wet bulb temperature T _NS (namely the temperature of the inlet air wet bulb of the exhaust air).

S403, according to T _PJ And T _NS Calculating the dew point temperature T of the indoor air _NL 。

S404, judging whether T is satisfied _XC ≤T _NL . If yes, the process proceeds to S405, otherwise, the process returns to S401.

S405, making the target value of the temperature of the fresh air outlet dry bulb equal to T _NL Substituting into formula Q _P ＝Q _X ×[(a-1)×T _XJ +T _XC ]/(a×T _PJ ) And calculating to obtain a target air discharge amount so as to change the rotating speed of an air exhaust fan according to the target air discharge amount to improve the air discharge amount.

S406, after running time T, re-detecting the current fresh air outlet dry bulb temperature T _XC 。

S407, judging whether T is satisfied _XC ≤T _NL . If yes, the process proceeds to S408, otherwise, the process returns to S401.

S408Let Δ T = T _NL -T _XC Delta T represents a temperature correction value, and the target value of the temperature of the fresh air outlet dry bulb is equal to T _NL +. DELTA T, into formula Q _P ＝Q _X ×[(a-1)×T _XJ +T _XC ]/(a×T _PJ ) And calculating to obtain a target air discharge amount so as to change the rotating speed of an air exhaust fan according to the target air discharge amount to improve the air discharge amount. And then returns to S406.

Considering that factors influencing the heat exchange effect are more, the detected fresh air outlet temperature may not reach the target value after the operation is performed for a period of time according to the calculated target air exhaust amount. Therefore, the air-out temperature of the detected fresh air is larger than the dew-point temperature of the indoor air by cyclic detection and continuous correction.

2) Gradually adjusting air quantity according to a certain range

Under the refrigeration operating mode, reduce the volume of airing exhaust and/or improve the fresh air volume, until the air-out temperature of airing exhaust is greater than outdoor air dew point temperature, include: under the refrigerating working condition, the air exhaust amount is gradually reduced and/or the fresh air amount is increased according to a first preset amplitude until the air exhaust temperature is higher than the dew point temperature of outdoor air.

Under the heating operating condition, improve the volume of airing exhaust and/or reduce the new trend volume of wind, until new trend air-out temperature is greater than indoor air dew point temperature, include: and under the heating working condition, gradually increasing the air exhaust quantity and/or reducing the fresh air quantity according to a second preset amplitude until the fresh air outlet temperature is higher than the indoor air dew point temperature.

The first preset amplitude and the second preset amplitude may be set according to requirements, and may be equal to each other, for example, set to 10%.

The embodiment adjusts the air volume step by step through the equal gradient without calculation, and is simple and easy to realize.

(2) Adjusting air conditioner set temperature

S202, adjusting the set temperature of the air conditioner according to the current working condition to enable the target temperature corresponding to the current working condition to be larger than the dew point temperature corresponding to the current working condition, wherein the adjusting comprises the following steps:

The first temperature limit value is the limit value of the set temperature of the air conditioner under the refrigeration working condition. The second temperature limit is a limit of the air conditioner set temperature under the heating condition. The air conditioning set temperature may be adjusted by a certain margin, for example, by an amount of change in the air conditioning set temperature.

According to the embodiment, the set temperature of the air conditioner is adjusted according to the dew point temperature corresponding to the current working condition, so that the target temperature corresponding to the current working condition is higher than the dew point temperature corresponding to the current working condition, and condensation prevention is realized through linkage control with the air conditioner.

It should be noted that, if the set temperature of the air conditioner is not less than the first temperature limit value under the cooling condition, or the set temperature of the air conditioner is not greater than the second temperature limit value under the heating condition, but there is still a risk of condensation (that is, the target temperature corresponding to the current condition is still less than or equal to the dew point temperature corresponding to the current condition), the set temperature of the air conditioner cannot be adjusted at this time, and condensation may be prevented by combining other means, for example, adjusting the air volume of the fresh air machine.

(3) Adjusting the air volume of the fresh air machine and the set temperature of the air conditioner

S202, adjusting the air volume of the fresh air fan and adjusting the set temperature of the air conditioner according to the current working condition so that the target temperature corresponding to the current working condition is greater than the dew point temperature corresponding to the current working condition, and the method comprises the following steps:

adjusting the air volume of the fresh air fan according to the current working condition, and adjusting the set temperature of the air conditioner according to the current working condition when a first preset condition is met until the target temperature corresponding to the current working condition is higher than the dew point temperature corresponding to the current working condition; alternatively, the first and second liquid crystal display panels may be,

and adjusting the set temperature of the air conditioner according to the current working condition, and adjusting the air volume of the fresh air fan according to the current working condition until the target temperature corresponding to the current working condition is higher than the dew point temperature corresponding to the current working condition when a second preset condition is met.

This embodiment will adjust the amount of wind of new fan and adjust the air conditioner and set for the temperature and combine together, can realize preventing the condensation control better.

The first preset condition and the second preset condition are conversion conditions between two adjusting modes of adjusting air volume and adjusting set temperature of the air conditioner. Based on the first preset condition and the second preset condition, the specific adjusting mode can be switched in time, and the combination of the two adjusting modes is realized.

The first preset condition includes: and adjusting the air volume of the new fan to the allowable air volume limit value, but still having the condensation risk, or adjusting the air volume of the new fan for the first preset time.

The second preset condition includes: and adjusting the set temperature of the air conditioner to the allowable temperature limit value, but still having the condensation risk, or adjusting the set temperature of the air conditioner for a second preset time.

The first preset number and the second preset number may be set according to a situation, and the first preset number and the second preset number may be equal, for example, set to 3 times. The set temperature of the air conditioner is adjusted to an allowable temperature limit value, specifically, the set temperature of the air conditioner is adjusted to be greater than or equal to a first temperature limit value under a refrigeration working condition, or the set temperature of the air conditioner is adjusted to be less than or equal to a second temperature limit value under a heating working condition.

Illustratively, the primary air volume is adjusted, if the condensation risk still exists, the set temperature of the primary air conditioner is adjusted again, if the condensation risk still exists, the primary air volume is adjusted again, and the operation is circulated until the target temperature corresponding to the current working condition is higher than the dew point temperature corresponding to the current working condition. And if the condensation risk still exists, returning to continuously adjust the air volume until the target temperature corresponding to the current working condition is higher than the dew point temperature corresponding to the current working condition.

Referring to fig. 5, a flow chart for realizing condensation prevention by combining the adjustment of the exhaust air volume of the fresh air fan and the adjustment of the set temperature of the air conditioner under the refrigeration condition comprises the following steps:

and S501, starting up the running time t. t denotes a detection operation period.

S502, detecting the temperature T of the outdoor air dry bulb _XJ (i.e. the fresh air inlet temperature) and the outdoor air wet bulb temperature T _JS (i.e. the temperature of the wet bulb of the fresh air inlet) according to T _XJ And T _JS Calculating the dew point temperature T of outdoor air _WL 。

S503, detecting the current temperature T of the exhaust air outlet dry bulb _PC (i.e., the above-described discharge air outlet temperature).

S504, judging whether T is satisfied _PC ≤T _WL . If so, the process proceeds to S505, otherwise, the process proceeds to S510.

S505, changing the rotating speed of the fan to reduce the exhaust air volume, specifically, making the target exhaust air volume be (1-epsilon) multiplied by Q _P 。Q _P Representing the current exhaust air volume, wherein epsilon represents the air volume fluctuation coefficient, and the value range of epsilon can be 5-20%.

S506, after the operation time T, the current temperature T of the exhaust air outlet dry bulb is detected again _PC 。

S507, judging whether T is met _PC ≤T _WL . If yes, the process proceeds to S508, otherwise, the process proceeds to S510.

S508, judging whether the set temperature T of the air conditioner is less than T _a . If yes, the process proceeds to S509, and if no, the process returns to S505.T is _a And the first temperature limit value is the limit value of the set temperature of the air conditioner under the refrigeration working condition.

And S509, increasing the set temperature of the air conditioner, specifically, enabling the set temperature of the air conditioner to be T + b. And b represents the variation of the set temperature of the air conditioner, which is the allowable deviation of the indoor environment temperature acceptable by the user. For example, when the air conditioner is used for cooling in summer, the set temperature of the air conditioner set by a user is 20 ℃, the indoor temperature is lower, and condensation is more likely to occur when the fresh air machine runs. T is _a The value of the air conditioner can be 26 ℃, the set temperature of the air conditioner can be properly increased by 2-3 ℃ due to the fact that the lifting space is available at 20 ℃ set by a user, the condensation problem is solved, and the indoor temperature cannot be greatly influenced.

S510, after the running time T, the current temperature T of the exhaust air outlet dry bulb is detected again _PC And returns to S504.

Referring to fig. 6, a flow chart for combining adjustment of the air discharge amount of the fresh air fan and adjustment of the set temperature of the air conditioner under the heating condition to achieve condensation prevention includes the following steps:

s601, starting up the running time t. t denotes a detection operation period.

S602, detecting the temperature T of the indoor air dry bulb _PJ (i.e., the above-mentioned exhaust air intake temperature) and the indoor air wet bulb temperature T _NS (i.e., the temperature of the wet bulb of the inlet air of the exhaust air) according to T _PJ And T _NS Calculating the dew point temperature T of the indoor air _NL 。

S603, detecting the current temperature T of the fresh air outlet dry bulb _XC (i.e., the fresh air outlet temperature).

S604, judging whether T is satisfied _XC ≤T _NL . If so, the process proceeds to S605, otherwise, the process proceeds to S610.

S605, changing the rotating speed of the fan to increase the exhaust air volume, specifically, making the target exhaust air volume be (1 + epsilon) multiplied by Q _P 。Q _P Representing the current exhaust air volume, wherein epsilon represents the air volume fluctuation coefficient, and the value range of epsilon can be 5-20%.

S606, after the running time T, the current temperature T of the fresh air outlet dry bulb is detected again _XC 。

S607, judging whether T is satisfied _XC ≤T _NL . If yes, the process proceeds to S608, otherwise, the process proceeds to S610.

S608, judging whether the set temperature T > T of the air conditioner is met _b . If yes, the process proceeds to S609, otherwise, the process returns to S605.T is a unit of _b And the second temperature limit value is the limit value of the set temperature of the air conditioner under the heating working condition.

And S609, reducing the set temperature of the air conditioner, specifically, enabling the set temperature of the air conditioner to be T-b. And b represents the variation of the set temperature of the air conditioner, which is the allowable deviation of the indoor environment temperature acceptable by the user. For example, when heating is performed in winter, the set temperature of the air conditioner set by a user is 28 ℃, and at the moment, the indoor temperature is higher, and condensation is more likely to occur when a fresh air fan operates. T is _b The value of the temperature can be 22 ℃, the 28 ℃ set by a user also can be reduced, the set temperature of the air conditioner can be properly reduced by 2-3 ℃, the condensation problem is solved, and the indoor temperature cannot be greatly influenced.

S610, after the running time T, the current temperature T of the fresh air outlet dry bulb is detected again _XC And returns to S604.

Based on the same invention concept, the embodiment of the invention also provides a fresh air fan condensation prevention control device, outdoor fresh air and indoor exhaust air exchange heat in the fresh air fan, and the device can be used for realizing the fresh air fan condensation prevention control method in the embodiment. The apparatus may be implemented by software and/or hardware.

Fig. 7 is a block diagram of a new fan condensation prevention control device according to an embodiment of the present invention, and as shown in fig. 7, the new fan condensation prevention control device includes:

the judging module 71 is configured to judge whether the fresh air machine has a condensation risk under the current working condition;

and the control module 72 is configured to, if yes, adjust the air volume of the fresh air blower and/or adjust the set temperature of the air conditioner according to the current working condition, so that the target temperature corresponding to the current working condition is greater than the dew point temperature corresponding to the current working condition.

Optionally, the determining module 71 is specifically configured to: under the refrigeration working condition, judging whether the air outlet temperature of the exhaust air is less than or equal to the dew point temperature of outdoor air, and if so, determining that the fresh air fan has a condensation risk under the refrigeration working condition; and judging whether the air outlet temperature of the fresh air is less than or equal to the dew point temperature of the indoor air under the heating condition, and if so, determining that the condensation risk exists in the fresh air machine under the heating condition.

Optionally, the control module 72 includes: the first control unit is used for reducing the air exhaust amount and/or improving the fresh air amount under the refrigeration working condition until the air exhaust and outlet temperature is greater than the dew point temperature of outdoor air; and under the heating condition, the air exhaust amount is increased and/or the fresh air amount is reduced until the fresh air outlet temperature is higher than the indoor air dew point temperature.

Optionally, the first control unit includes: the first control subunit is used for determining a target value of the exhaust air outlet temperature according to a first preset rule under the refrigeration working condition; calculating a target air exhaust quantity according to the target value of the current air exhaust and air outlet temperature, the air exhaust and air inlet temperature, the fresh air quantity, the fresh air inlet temperature and the heat recovery efficiency, or calculating the target fresh air quantity according to the target value of the current air exhaust and air outlet temperature, the air exhaust and air inlet temperature, the air exhaust quantity, the fresh air inlet temperature and the heat recovery efficiency; and adjusting the rotating speed of the air exhaust fan according to the target air exhaust amount or adjusting the rotating speed of the fresh air fan according to the target fresh air amount until the air exhaust outlet temperature is higher than the dew point temperature of the outdoor air.

Optionally, the first control subunit is specifically configured to:

and then returning to the step of acquiring the air outlet temperature of the exhaust air again after executing the preset time until the air outlet temperature of the exhaust air is greater than the dew point temperature of the outdoor air.

Optionally, the first control subunit calculates the target air discharge amount or the target fresh air amount by using the following formula:

a＝(Q _P ×T _PJ -Q _P ×T _PC )/(Q _P ×T _PJ -Q _X ×T _XJ )，

wherein a represents heat recovery efficiency, Q _P Indicating the amount of exhaust air, Q _X Indicating fresh air volume, T _XJ Indicating the temperature of the fresh air, T _PJ Indicating temperature of exhaust air, T _PC And the exhaust air outlet temperature is shown.

Optionally, the first control unit includes: and the second control subunit is used for reducing the air exhaust quantity and/or increasing the fresh air quantity step by step according to a first preset amplitude under the refrigerating working condition until the air exhaust outlet temperature is greater than the outdoor air dew point temperature.

Optionally, the first control unit includes: the third control subunit is used for determining a target value of the fresh air outlet temperature according to a second preset rule under the heating condition; calculating a target air exhaust quantity according to the target value of the current fresh air outlet temperature, the fresh air inlet temperature, the air exhaust inlet temperature, the fresh air quantity and the heat recovery efficiency, or calculating the target fresh air quantity according to the target value of the current fresh air outlet temperature, the fresh air inlet temperature, the air exhaust quantity and the heat recovery efficiency; and adjusting the rotating speed of an exhaust fan according to the target exhaust air quantity or adjusting the rotating speed of a fresh air fan according to the target fresh air quantity until the fresh air outlet temperature is higher than the indoor air dew point temperature.

Optionally, the third control subunit is specifically configured to:

Optionally, the third control subunit calculates the target air discharge amount or the target fresh air amount by using the following formula:

a＝(Q _X ×T _XJ -Q _X ×T _XC )/(Q _X ×T _XJ -Q _P ×T _PJ )，

wherein a represents heat recovery efficiency, Q _P Indicating the amount of exhaust air, Q _X Indicating fresh air volume, T _XJ Indicating the temperature of the fresh air, T _PJ Indicating temperature of exhaust air, T _XC And the air outlet temperature of the fresh air is shown.

Optionally, the first control unit includes: and the fourth control subunit is used for increasing the air exhaust quantity and/or reducing the fresh air quantity step by step according to a second preset amplitude under the heating working condition until the fresh air outlet temperature is higher than the indoor air dew point temperature.

Optionally, the control module 72 includes: a second control unit for:

under the refrigerating working condition, judging whether the set temperature of the air conditioner is smaller than a first temperature limit value or not; if the set air conditioner temperature is lower than the first temperature limit value, the set air conditioner temperature is increased, the exhaust air outlet temperature is obtained again after the preset time, and if the exhaust air outlet temperature is still lower than or equal to the outdoor air dew point temperature, the step of judging whether the set air conditioner temperature is lower than the first temperature limit value is executed again until the exhaust air outlet temperature is higher than the outdoor air dew point temperature; if the set temperature of the air conditioner is not less than the first temperature limit value, the set temperature of the air conditioner is not adjusted;

Optionally, the control module 72 includes: the third control unit is used for adjusting the air volume of the fresh air fan according to the current working condition, and when a first preset condition is met, adjusting the set temperature of the air conditioner according to the current working condition until the target temperature corresponding to the current working condition is higher than the dew point temperature corresponding to the current working condition; or adjusting the set temperature of the air conditioner according to the current working condition, and adjusting the air volume of the fresh air fan according to the current working condition when a second preset condition is met until the target temperature corresponding to the current working condition is higher than the dew point temperature corresponding to the current working condition.

Optionally, the first preset condition includes: adjusting the air volume of the new fan to an allowable air volume limit value, wherein a condensation risk still exists, or adjusting times of the air volume of the new fan reach first preset times; the second preset condition includes: and adjusting the set temperature of the air conditioner to an allowable temperature limit value, wherein the risk of condensation still exists, or the adjusting times of the set temperature of the air conditioner reach a second preset times.

The device can execute the fresh air fan condensation prevention control method provided by the embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method. For details of the technology that are not described in detail in this embodiment, reference may be made to the method for controlling condensation prevention of the new air blower provided in the embodiment of the present invention.

An embodiment of the present invention further provides a new fan, including: the new fan anti-condensation control device of the embodiment.

Embodiments of the present invention further provide a non-volatile computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method described in the above embodiments.

An embodiment of the present invention further provides a computer device, including: the system comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the steps of the method of the embodiment.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to the needs to achieve the purpose of the solution of the embodiment.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. Based on the understanding, the above technical solutions substantially or otherwise contributing to the prior art may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the various embodiments or some parts of the embodiments.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A new fan condensation prevention control method is characterized in that outdoor new air and indoor exhaust air exchange heat in a new fan, and the method comprises the following steps:

and if so, adjusting the air volume of the fresh air fan and/or adjusting the set temperature of the air conditioner according to the current working condition so as to enable the target temperature corresponding to the current working condition to be larger than the dew point temperature corresponding to the current working condition.

2. The method of claim 1, wherein determining whether the fresh air machine is at risk of condensation under current operating conditions comprises:

and under the heating working condition, judging whether the outlet air temperature of the fresh air is less than or equal to the dew point temperature of the indoor air, and if so, determining that the condensation risk exists in the fresh air fan under the heating working condition.

3. The method of claim 1, wherein adjusting the air volume of the fresh air machine according to the current operating condition so that the target temperature corresponding to the current operating condition is greater than the dew point temperature corresponding to the current operating condition comprises:

4. The method of claim 3, wherein reducing the amount of exhaust air and/or increasing the amount of fresh air until the exhaust air outlet temperature is greater than the dew point temperature of the outdoor air in the cooling mode comprises:

under the refrigerating working condition, determining a target value of the exhaust air outlet temperature according to a first preset rule; calculating a target air exhaust quantity according to the target value of the current air exhaust and air outlet temperature, the air exhaust and air inlet temperature, the fresh air quantity, the fresh air inlet temperature and the heat recovery efficiency, or calculating the target fresh air quantity according to the target value of the current air exhaust and air outlet temperature, the air exhaust and air inlet temperature, the air exhaust quantity, the fresh air inlet temperature and the heat recovery efficiency; and adjusting the rotating speed of the air exhaust fan according to the target air exhaust amount or adjusting the rotating speed of the fresh air fan according to the target fresh air amount until the air exhaust outlet temperature is higher than the dew point temperature of the outdoor air.

5. The method according to claim 4, characterized in that under the refrigeration condition, the target value of the exhaust air outlet temperature is determined according to a first preset rule; calculating a target air exhaust quantity according to the target value of the current air exhaust and air outlet temperature, the air exhaust and air inlet temperature, the fresh air quantity, the fresh air inlet temperature and the heat recovery efficiency, or calculating the target fresh air quantity according to the target value of the current air exhaust and air outlet temperature, the air exhaust and air inlet temperature, the air exhaust quantity, the fresh air inlet temperature and the heat recovery efficiency; adjusting the rotating speed of an air exhaust fan according to the target air exhaust amount or adjusting the rotating speed of a fresh air fan according to the target fresh air amount until the air exhaust air temperature is greater than the outdoor air dew point temperature, and the method comprises the following steps:

the target value of the air exhaust outlet temperature is equal to the dew point temperature of outdoor air so as to calculate a target air exhaust quantity or a target fresh air quantity, and the rotating speed of an air exhaust fan is adjusted according to the target air exhaust quantity or the rotating speed of a fresh air fan is adjusted according to the target fresh air quantity;

6. The method of claim 4, wherein the target exhaust air volume or the target fresh air volume is calculated using the following formula:

a＝(Q _P ×T _PJ -Q _P ×T _PC )/(Q _P ×T _PJ -Q _X ×T _XJ )，

7. The method of claim 3, wherein reducing the exhaust air volume and/or increasing the fresh air volume until the exhaust air outlet temperature is greater than the dew point temperature of the outdoor air in the cooling mode comprises:

8. The method of claim 3, wherein under the heating condition, increasing the exhaust air volume and/or decreasing the fresh air volume until the fresh air outlet temperature is greater than the dew point temperature of the indoor air comprises:

under the heating condition, determining a target value of the fresh air outlet temperature according to a second preset rule; calculating a target air exhaust quantity according to the target value of the current fresh air outlet temperature, the fresh air inlet temperature, the air exhaust inlet temperature, the fresh air quantity and the heat recovery efficiency, or calculating the target fresh air quantity according to the target value of the current fresh air outlet temperature, the fresh air inlet temperature, the air exhaust quantity and the heat recovery efficiency; and adjusting the rotating speed of an exhaust fan according to the target exhaust air quantity or adjusting the rotating speed of a fresh air fan according to the target fresh air quantity until the fresh air outlet temperature is higher than the indoor air dew point temperature.

9. The method according to claim 8, characterized in that under the heating condition, a target value of the fresh air outlet temperature is determined according to a second preset rule; calculating a target air volume according to the current target value of the fresh air outlet temperature, the fresh air inlet temperature, the air outlet inlet temperature, the fresh air volume and the heat recovery efficiency, or calculating the target fresh air volume according to the current target value of the fresh air outlet temperature, the fresh air inlet temperature, the air outlet volume and the heat recovery efficiency; adjusting the rotating speed of an air exhaust fan according to the target air exhaust amount or adjusting the rotating speed of a fresh air fan according to the target fresh air amount until the fresh air outlet temperature is greater than the indoor air dew point temperature, and the method comprises the following steps:

the target value of the fresh air outlet temperature is equal to the indoor air dew point temperature to calculate a target air exhaust quantity or a target fresh air quantity, and the rotating speed of the air exhaust fan is adjusted according to the target air exhaust quantity or the rotating speed of the fresh air fan is adjusted according to the target fresh air quantity;

10. The method of claim 8, wherein the target exhaust air volume or the target fresh air volume is calculated using the following formula:

a＝(Q _X ×T _XJ -Q _X ×T _XC )/(Q _X ×T _XJ -Q _P ×T _PJ )，

11. The method of claim 3, wherein under the heating condition, increasing the exhaust air volume and/or decreasing the fresh air volume until the fresh air outlet temperature is greater than the dew point temperature of the indoor air comprises:

12. The method of claim 1, wherein adjusting the air conditioner set temperature according to the current operating condition so that the target temperature corresponding to the current operating condition is greater than the dew point temperature corresponding to the current operating condition comprises:

under the heating condition, judging whether the set temperature of the air conditioner is greater than a second temperature limit value; if the set temperature of the air conditioner is greater than a second temperature limit value, reducing the set temperature of the air conditioner, acquiring the fresh air outlet temperature again after the preset time, and if the fresh air outlet temperature is still less than or equal to the indoor air dew point temperature, returning to the step of judging whether the set temperature of the air conditioner is greater than the second temperature limit value until the fresh air outlet temperature is greater than the indoor air dew point temperature; and if the set temperature of the air conditioner is not greater than the second temperature limit value, not adjusting the set temperature of the air conditioner.

13. The method according to any one of claims 1 to 12, wherein adjusting the air volume of the fresh air fan and adjusting the air conditioner set temperature according to the current working condition so that the target temperature corresponding to the current working condition is greater than the dew point temperature corresponding to the current working condition comprises:

14. The method according to claim 13, wherein the first preset condition comprises: adjusting the air volume of the new fan to an allowable air volume limit value, but still having a condensation risk, or adjusting the air volume of the new fan for a first preset time;

the second preset condition includes: and adjusting the set temperature of the air conditioner to an allowable temperature limit value, wherein the risk of condensation still exists, or the adjusting times of the set temperature of the air conditioner reach a second preset times.

15. The utility model provides a new fan prevents condensation controlling means, outdoor new trend and indoor air exhaust be in carry out the heat transfer in the new fan, its characterized in that, the device includes:

16. A new fan, comprising: the new fan anti-condensation control device of claim 15.

17. A non-transitory computer-readable storage medium, on which a computer program is stored, wherein the computer program, when executed by a processor, performs the steps of the method according to any one of claims 1 to 14.