CN114087743A

CN114087743A - Heat pipe fresh air machine, control method thereof and computer readable storage medium

Info

Publication number: CN114087743A
Application number: CN202111406496.9A
Authority: CN
Inventors: 杜顺开; 黄剑云; 高卓贤; 刘步东; 徐振坤; 李金波
Original assignee: GD Midea Air Conditioning Equipment Co Ltd; Midea Group Wuhan Refrigeration Equipment Co Ltd
Current assignee: GD Midea Air Conditioning Equipment Co Ltd; Midea Group Wuhan Refrigeration Equipment Co Ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2022-02-25
Anticipated expiration: 2041-11-24
Also published as: CN114087743B

Abstract

The invention discloses a control method of a heat pipe fresh air fan, the heat pipe fresh air fan comprises a fresh air duct, an exhaust air duct, a heat exchange module and a dehumidification module, the heat exchange module comprises a first loop, the first loop comprises a first heat exchanger, a second heat exchanger, a first throttling device and a third heat exchanger which are sequentially connected, the first heat exchanger is arranged in the exhaust air duct, the third heat exchanger, the dehumidification module and the second heat exchanger are sequentially arranged in the fresh air duct along a fresh air flow path, and the dehumidification module is independent of the arrangement of the first loop, the method comprises the following steps: acquiring characteristic temperature representing the temperature regulation requirement of fresh air; determining target control parameters of the heat exchange module according to the characteristic temperature; and controlling the heat exchange module to operate according to the target control parameter so as to match the heat exchange quantity of the second heat exchanger with the temperature regulation requirement. The invention also discloses a heat pipe fresh air machine and a readable storage medium. The invention improves the accuracy of fresh air outlet temperature adjustment, reduces the fluctuation of fresh air outlet temperature and improves the comfort of indoor users.

Description

Heat pipe fresh air machine, control method thereof and computer readable storage medium

Technical Field

The invention relates to the technical field of fresh air equipment, in particular to a control method of a heat pipe fresh air machine, the heat pipe fresh air machine and a computer readable storage medium.

Background

In recent years, as the quality of life of people is improved, the quality of indoor air is increasingly emphasized. The fresh air handling unit is an important component of a room air conditioning system, and on one hand, the fresh air handling unit can send filtered outdoor fresh air into a room to replace dirty air; on the other hand, the fresh air can be subjected to heat and humidity treatment to bear the heat and humidity load of part of rooms.

The existing heat pipe fresh air machine is characterized in that a heat pipe heat exchanger is arranged in front of and behind a cold source, fresh air firstly absorbs heat and is cooled through a heat pipe evaporator, then is further dehumidified and cooled through the cold source, and is heated and heated through a heat pipe condenser and then is sent into a room. The heat pipe evaporator absorbs heat from the high-temperature fresh air to change the liquid refrigerant into the gaseous refrigerant, the gaseous refrigerant enters the heat pipe condenser under the pressure difference, the dehumidified and cooled low-temperature fresh air is condensed into the liquid refrigerant, and the liquid refrigerant flows into the heat pipe evaporator to complete the heat pipe circulation under the siphon action generated by the flowing of the throttling part.

However, in the process of dehumidifying and reheating the fresh air by the heat pipe fresh air machine at present, the fresh air is generally heated according to preset fixed parameters, which easily causes the heating capacity of the heat pipe fresh air machine to be too large or too small, resulting in large fluctuation of the outlet air temperature of the heat pipe fresh air machine and affecting the comfort of indoor users.

Disclosure of Invention

The invention mainly aims to provide a control method of a heat pipe fresh air machine, the heat pipe fresh air machine and a computer readable storage medium, aiming at improving the accuracy of the fresh air outlet temperature regulation, reducing the air outlet temperature fluctuation of the heat pipe fresh air machine and improving the comfort of indoor users.

In order to achieve the above object, the present invention provides a control method for a heat pipe fresh air machine, wherein the heat pipe fresh air machine comprises a fresh air duct, an exhaust air duct, a heat exchange module and a dehumidification module, the heat exchange module comprises a first loop, the first loop comprises a first heat exchanger, a second heat exchanger, a first throttling device and a third heat exchanger which are sequentially connected, the first heat exchanger is arranged in the exhaust air duct, the third heat exchanger, the dehumidification module and the second heat exchanger are sequentially arranged in the fresh air duct along a fresh air flow path, the dehumidification module is independent of the first loop, and the control method for the heat pipe fresh air machine comprises the following steps:

acquiring characteristic temperature representing the temperature regulation requirement of fresh air;

determining target control parameters of the heat exchange module according to the characteristic temperature;

and controlling the heat exchange module to operate according to the target control parameter so as to enable the heat exchange quantity of the second heat exchanger to be matched with the temperature regulation requirement.

Optionally, the step of determining a target control parameter of the heat exchange module according to the characteristic temperature includes:

when the characteristic temperature is greater than or equal to a first set temperature, determining a first control parameter as the target control parameter; the first control parameter is used for stopping the heat exchange of the second heat exchanger;

when the characteristic temperature is higher than a second set temperature and lower than the first set temperature, determining a second control parameter as the target control parameter; the second control parameter is used for reducing the heat exchange quantity of the second heat exchanger, and the second set temperature is smaller than the first set temperature;

and when the characteristic temperature is lower than the second set temperature, determining a third control parameter as the target control parameter, wherein the third control parameter is used for increasing the heat exchange quantity of the second heat exchanger.

Optionally, the heat exchange module further includes the solenoid valve, a compressor, and a first check valve disposed between a refrigerant outlet of the third heat exchanger and a refrigerant inlet of the first heat exchanger, the compressor is connected in parallel with the first check valve, the solenoid valve is connected in series with the compressor, and the first control parameter includes one of the following parameters:

turning off the compressor and turning off the first throttling device;

the compressor is closed and the solenoid valve is opened.

Optionally, the heat exchange module further includes an electromagnetic valve, a compressor, and a first check valve disposed between a refrigerant outlet of the third heat exchanger and a refrigerant inlet of the first heat exchanger, the compressor is connected in parallel with the first check valve, the electromagnetic valve is connected in series with the compressor, the heat exchange module further includes an exhaust fan disposed in the exhaust air duct, and the second control parameter includes at least one of the following parameters:

increasing the running speed of the exhaust fan;

controlling the compressor to be switched from an open state to a closed state, controlling the electromagnetic valve to be switched from an open state to a closed state, and controlling the first throttling device to maintain the open state;

and controlling the compressor to maintain a closed state, and controlling the electromagnetic valve to be switched from the closed state to the open state or controlling the first throttling device to be switched from the open state to the closed state.

Optionally, the heat exchange module further includes an electromagnetic valve, a compressor, and a first check valve disposed between a refrigerant outlet of the third heat exchanger and a refrigerant inlet of the first heat exchanger, the compressor is connected in parallel with the first check valve, the electromagnetic valve is connected in series with the compressor, the heat exchange module further includes an exhaust fan disposed in the exhaust air duct, and the third control parameter includes at least one of the following parameters:

reducing the running rotating speed of the exhaust fan;

controlling the compressor to be switched from a closed state to an open state, controlling the electromagnetic valve to be switched from the closed state to the open state, and controlling the first throttling device to maintain the open state;

controlling the compressor to maintain a closed state, controlling the electromagnetic valve to be switched from an open state to a closed state, and controlling the first throttling device to maintain an open state;

the compressor is controlled to maintain a closed state, the electromagnetic valve is controlled to maintain a closed state, and the first throttling device is controlled to be switched from a closed state to an open state.

Optionally, the heat exchange module further includes a solenoid valve, a compressor, and a first check valve disposed between a refrigerant outlet of the third heat exchanger and a refrigerant inlet of the first heat exchanger, the compressor is connected in parallel with the first check valve, the solenoid valve is connected in series with the compressor, and the control method of the heat pipe fresh air machine further includes:

when the dehumidification reheating mode is started, the dehumidification module is controlled to be started, the compressor is controlled to be closed, the electromagnetic valve is controlled to be closed, and the first throttling device is controlled to be opened; and

when the dehumidification module is in an opening state, the compressor is in a closing state, the electromagnetic valve is in a closing state and the first throttling device is in an opening state, the step of acquiring the characteristic temperature is executed; or

When the dehumidification reheating mode is started, the dehumidification module is controlled to be started, the compressor is controlled to be started, the electromagnetic valve is controlled to be started, and the first throttling device is controlled to be opened; and

and when the dehumidification module is in an opening state, the compressor is in an opening state, the electromagnetic valve is in an opening state and the first throttling device is in an opening state, executing the step of acquiring the characteristic temperature.

Optionally, the step of obtaining the characteristic temperature includes:

acquiring the fresh air outlet temperature of the heat pipe fresh air machine, wherein the characteristic temperature comprises the fresh air outlet temperature;

or acquiring the environment temperature of the action space of the heat pipe fresh air fan, wherein the characteristic temperature comprises the environment temperature;

or acquiring the exhaust temperature of the heat pipe fresh air machine, wherein the characteristic temperature comprises the exhaust temperature;

or, acquiring the coil temperature of the second heat exchanger, wherein the characteristic temperature comprises the coil temperature.

In addition, in order to realize above-mentioned purpose, this application still provides a new fan of heat pipe, new fan of heat pipe includes:

a fresh air duct;

an air exhaust duct;

the heat exchange module comprises a first loop, the first loop comprises a first heat exchanger, a second heat exchanger, a first throttling device and a third heat exchanger which are sequentially connected, and the first heat exchanger is arranged in an air exhaust duct;

the dehumidification module is independent of the first loop, and the third heat exchanger, the dehumidification module and the second heat exchanger are sequentially arranged along a fresh air flow path in the fresh air duct;

controlling means, heat transfer module with the dehumidification module all with controlling means connects, controlling means includes: the control method comprises a memory, a processor and a control program of the heat pipe ventilator, wherein the control program of the heat pipe ventilator is stored on the memory and can be run on the processor, and when the control program of the heat pipe ventilator is executed by the processor, the steps of the control method of the heat pipe ventilator are realized.

Optionally, the heat pipe ventilator further includes:

the first one-way valve is arranged between a refrigerant outlet of the third heat exchanger and a refrigerant inlet of the first heat exchanger;

a compressor connected in parallel with the first check valve; and

the electromagnetic valve is connected with the compressor in series;

and/or the heat pipe fresh air machine further comprises an exhaust fan, and the exhaust fan is arranged in the exhaust air duct.

In addition, in order to achieve the above object, the present application also provides a computer readable storage medium, where a control program of the heat pipe ventilator is stored, and when the control program of the heat pipe ventilator is executed by a processor, the steps of the control method of the heat pipe ventilator as described in any one of the above are implemented.

The invention provides a control method of a heat pipe fresh air machine, which is characterized in that a first heat exchanger is arranged in an exhaust air duct, a third heat exchanger, a dehumidification module and a second heat exchanger are arranged on a fresh air flow path for the first time, the first heat exchanger, the second heat exchanger, a first throttling device and the third heat exchanger are sequentially connected in series to form a first loop, wherein the first heat exchanger can recover sensible heat exhausted in the exhaust air duct, a refrigerant with the sensible heat recovered in the first loop further enters the second heat exchanger to heat the dehumidified fresh air so as to realize dehumidification and reheating of the fresh air, and based on the heat pipe fresh air machine, the method adjusts a target control parameter of a heat exchange module based on a characteristic temperature representing the actual heating demand of the fresh air instead of adjusting and controlling the fresh air heating quantity of the heat exchange module according to a preset fixed parameter, thereby ensuring that the sensible heat recovered in the exhaust air duct in the heat exchange module comprising the first loop flows into the second heat exchanger The refrigerant, its heat transfer volume can be with the accurate matching of the actual temperature regulation demand of new trend to improve the accuracy nature of new trend air-out temperature regulation, reduce the air-out temperature fluctuation of the new fan of heat pipe, improve indoor user's travelling comfort.

Drawings

FIG. 1 is a schematic structural diagram of a heat pipe ventilator according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of another embodiment of the heat pipe ventilator of the present invention;

FIG. 3 is a schematic structural diagram of a heat pipe ventilator according to another embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a heat pipe ventilator according to yet another embodiment of the present invention;

FIG. 5 is a schematic diagram of a hardware configuration involved in operation of a heat pipe ventilator according to an embodiment of the present invention;

FIG. 6 is a schematic flow chart illustrating a method for controlling a heat pipe ventilator according to an embodiment of the present invention;

FIG. 7 is a schematic flow chart diagram illustrating another embodiment of a method for controlling a heat pipe ventilator according to the present invention;

fig. 8 is a schematic flow chart illustrating a method for controlling a heat pipe ventilator according to another embodiment of the present invention.

The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The main solution of the embodiment of the invention is as follows: a control method is provided based on a heat pipe fresh air fan, the heat pipe fresh air fan comprises a fresh air duct, an air exhaust duct, a heat exchange module and a dehumidification module, the heat exchange module comprises a first loop, the first loop comprises a first heat exchanger, a second heat exchanger, a first throttling device and a third heat exchanger which are sequentially connected, the first heat exchanger is arranged in the air exhaust duct, the third heat exchanger, the dehumidification module and the second heat exchanger are sequentially arranged in the fresh air duct along the fresh air flow path, and the dehumidification module is independent of the first loop and comprises the following steps: acquiring characteristic temperature representing the temperature regulation requirement of fresh air; determining target control parameters of the heat exchange module according to the characteristic temperature; and controlling the heat exchange module to operate according to the target control parameter so as to enable the heat exchange quantity of the second heat exchanger to be matched with the temperature regulation requirement.

In the prior art, in the process of dehumidifying and reheating the fresh air by the existing heat pipe fresh air machine, the fresh air is generally heated according to preset fixed parameters, so that the heating capacity of the heat pipe fresh air machine is easily too large or too small, the fluctuation of the air outlet temperature of the heat pipe fresh air machine is large, and the comfort of indoor users is influenced.

The invention provides the solution, and aims to improve the accuracy of fresh air outlet temperature adjustment, reduce the outlet temperature fluctuation of a heat pipe fresh air machine and improve the comfort of indoor users.

The embodiment of the invention provides a heat pipe fresh air machine.

Referring to fig. 1, in the embodiment of the present invention, the heat pipe fresh air blower includes: fresh air duct 1, air exhaust duct 2, heat exchange module 01 and dehumidification module.

The heat exchange module 01 comprises a first loop, and the first loop comprises a first heat exchanger 5, a second heat exchanger 6, a first throttling device 12 and a third heat exchanger 7 which are sequentially connected in series.

The dehumidification module 4 is arranged independently of the first circuit. In the present embodiment, the dehumidification module 4 is embodied as a heat exchanger in an evaporation state. In other embodiments, the dehumidification module 4 may also be any module having a dehumidification function, such as a module loaded with a desiccant, or the like.

First heat exchanger 5 set up in air exhaust wind channel 2, second heat exchanger 6, third heat exchanger 7 and dehumidification module 8 set up in new trend wind channel 1, and third heat exchanger 7, dehumidification module 8 and second heat exchanger 6 are in arrange in proper order on the new trend flow path in new trend wind channel 1, and the new trend that enters into in new trend wind channel 1 from outdoor passes through third heat exchanger 7, dehumidification module 8 and second heat exchanger 6 in proper order, dehumidification module 8 can cool down the dehumidification to the new trend.

Further, the heat exchange module 01 may further include an air exhaust fan 3 and a fresh air fan 4 respectively and correspondingly disposed in the air exhaust duct 2 and the fresh air duct 1, the air exhaust fan 3 is configured to suck indoor air into the air exhaust duct 2 and discharge the air to the outside, and the fresh air fan 4 is configured to suck outdoor air into the fresh air duct 1 and discharge the air to the inside of the room.

Determining whether the fresh air needs to be dehumidified and reheated and the degree of dehumidification and reheating according to the temperature of the exhaust air at the inlet of the exhaust air duct 2 and the temperature of the fresh air at the inlet of the fresh air duct 1, wherein different working conditions operate in the most appropriate mode; meanwhile, the first heat exchanger is arranged in the exhaust channel 2, sensible heat of exhaust air is recovered, and an energy-saving effect is achieved.

When the indoor temperature is low and the temperature of the fresh air is moderate, the fresh air needs to be subjected to energy-saving dehumidification and reheating. At this time, the first throttling device 12 is opened, and the heat pipe fresh air machine starts to perform a heat pipe heat recovery cycle, and the dehumidification module 8 is started at the same time. The first heat exchanger 5 is arranged in the exhaust air duct 2, because the indoor temperature is low, the exhaust air temperature passing through the exhaust air duct 2 is also low, the medium-temperature gaseous refrigerant transfers heat to the exhaust air outside the first heat exchanger 5 and then liquefies, and the temperature is reduced; the fresh air with lower temperature is used for cooling the medium-temperature refrigerant, so that heat recovery is realized, and the energy utilization rate is improved. The refrigerant with the reduced temperature is led out of the first heat exchanger 5 and then enters the second heat exchanger 6, heat is transferred to fresh air outside the second heat exchanger 6, the temperature is further reduced, and the pressure and the temperature of the refrigerant are further reduced after the refrigerant flows through the first throttling device 12. Then the refrigerant flows in the first throttling device 12 to generate siphon action and enters the third heat exchanger 7, the third heat exchanger 7 is arranged at a fresh air inlet, the temperature of fresh air is moderate, and after the heat of fresh air outside the third heat exchanger 7 is absorbed, the liquid refrigerant is converted into gaseous refrigerant. The refrigerant at the inlet side of the first heat exchanger 5 is in a gas state, the refrigerant at the outlet side of the first heat exchanger 5 is in a liquid state, and the gas refrigerant flowing out of the third heat exchanger 7 enters the first heat exchanger 5 under the action of pressure difference to perform the next cycle. The third heat exchanger 7, the dehumidification module 8 and the second heat exchanger 6 are sequentially arranged in the fresh air duct 1, and the third heat exchanger 7 is located at an inlet of the fresh air duct 1. When the medium temperature fresh air enters the fresh air duct 1, the medium temperature fresh air firstly passes through the third heat exchanger 7, heat is transferred to the refrigerant, and then the temperature is reduced. After the fresh air passes through the dehumidification module 8, the dehumidification module 8 is in an operation state at the moment, the temperature and the humidity of the fresh air are both reduced, and finally, when the fresh air passes through the second heat exchanger 6, the fresh air absorbs the heat of the refrigerant, the temperature rises to a proper value, and then the fresh air enters the room, so that the indoor air comfort level is improved.

When the indoor temperature is higher, need carry out the dehumidification cooling to the new trend. At this point the first throttle means 12 is closed. Since the first throttling device 12 is closed, the refrigerant flowing out of the second heat exchanger 6 cannot enter the third heat exchanger 7, and the heat pipe circulation of the heat pipe ventilator is interrupted. When the fresh air passes through the fresh air duct 1, the third heat exchanger 7 and the second heat exchanger 6 do not perform heat exchange work because the refrigerant cannot complete circulation. Because dehumidification module 8 is in the open mode, the new trend passes through during dehumidification module 8, temperature and humidity all reduce, it is indoor to get into afterwards, improves indoor air comfort level.

In an embodiment, dehumidification module 8 is equipped with cold water inlet and cold water outlet, the cold source that dehumidification module 8 carries out the cooling dehumidification is cold water, realizes through external cold water source that cold water is in circulation flow in dehumidification module 8 reaches the effect of continuously cooling the dehumidification to the new trend.

Referring to fig. 1, in an embodiment, the heat exchange module 01 may further include the solenoid valve 22, a first compressor 16, and a first check valve 20 disposed between a refrigerant outlet of the third heat exchanger 7 and a refrigerant inlet of the first heat exchanger 5, where the first compressor 16 is connected in parallel with the first check valve 20, and the solenoid valve is connected in series with the first compressor 16. Based on this, be favorable to improving the adaptability of heat pipe new trend machine to different operating mode conditions, be favorable to guaranteeing all can to guarantee when the new trend temperature is lower or higher that the heat pipe fan is energy-conserving simultaneously can be with the humiture regulation of new trend to reaching indoor user's comfortable state.

Specifically, a first compressor 16 is connected to the first loop in an external manner, an outlet of the first compressor 16 is communicated with an inlet of the first heat exchanger 5, an inlet of the first compressor 16 is communicated with an outlet of the third heat exchanger 7, a first one-way valve 20 flowing from the outlet of the third heat exchanger 7 to the inlet of the first heat exchanger 5 is connected to the first loop in series, the first compressor 16 is connected to the first one-way valve 20 in parallel, a second one-way valve 21 is arranged on a pipeline connected to the first loop at an outlet side of the first compressor 16, a flow direction is from the outlet of the first compressor 16 to the inlet of the first heat exchanger 5, and an electromagnetic valve 22 is arranged on a pipeline connected to the first loop at an inlet side of the first compressor 16. The heat pump cycle dehumidification and reheating or the heat pipe cycle dehumidification and reheating in different modes are realized by opening and closing the first compressor 16, the first throttling device 12 and the dehumidification module 8; the flow direction of the refrigerant in the heat pipe fresh air machine in different modes is controlled by opening and closing the electromagnetic valve 22 and the first check valve 20 and the second check valve 21 which limit the flow direction.

When the indoor temperature is low and the fresh air temperature is high, the dehumidification reheating of the fresh air needs to be enhanced. At this time, the first compressor 16 is controlled to be started, the electromagnetic valve 22 and the first throttling device 12 are opened, and the heat pipe fresh air machine starts to perform a heat pump heat recovery cycle and simultaneously starts the dehumidification module 8. After the first compressor 16 is started, the sucked medium-temperature low-pressure gaseous refrigerant is compressed and converted into a high-temperature high-pressure gaseous refrigerant, and after the high-temperature high-pressure gaseous refrigerant is discharged from the first compressor 16, the high-temperature high-pressure gaseous refrigerant passes through the second check valve 21 and is then introduced into the first heat exchanger 5. The first heat exchanger 5 is arranged in the exhaust air duct 2, the exhaust air temperature passing through the exhaust air duct 2 is low due to low indoor temperature, and the high-temperature and high-pressure gaseous refrigerant transfers heat to the exhaust air outside the first heat exchanger 5 and then liquefies, so that the temperature is reduced; the fresh air with lower temperature is utilized to cool the high-temperature refrigerant, so that heat recovery is realized, and the energy utilization rate is improved. The refrigerant with the reduced temperature is led out of the first heat exchanger 5 and then enters the second heat exchanger 6, heat is transferred to fresh air outside the second heat exchanger 6, the temperature is further reduced, and after the refrigerant flows through the first throttling device 12, the refrigerant is changed from high pressure to low pressure, and the temperature is further reduced. And then, the refrigerant enters a third heat exchanger 7, the third heat exchanger 7 is arranged at a fresh air inlet, the fresh air has higher temperature, and after the heat of the fresh air outside the third heat exchanger 7 is absorbed, the low-temperature and low-pressure liquid refrigerant is converted into a medium-temperature and low-pressure gaseous refrigerant. Since the first compressor 16 is turned on, the electromagnetic valve 22 is in an open state, and the pressure on the outlet side of the first compressor 16 is higher than the pressure on the inlet side of the first compressor 16, the refrigerant does not pass through the first check valve 20, and the intermediate-temperature low-pressure gaseous refrigerant is introduced out of the third heat exchanger 7, sucked by the first compressor 16, and subjected to the next cycle. The third heat exchanger 7, the dehumidification module 8 and the second heat exchanger 6 are sequentially arranged in the fresh air duct 1, and the third heat exchanger 7 is located at an inlet of the fresh air duct 1. When the high-temperature fresh air enters the fresh air duct 1, the temperature of the high-temperature fresh air firstly passes through the third heat exchanger 7, and then the heat is transferred to the refrigerant, so that the temperature is reduced. After the fresh air passes through the dehumidification module 8, the dehumidification module 8 is in an operation state at the moment, the temperature and the humidity of the fresh air are both reduced, and finally, when the fresh air passes through the second heat exchanger 6, the fresh air absorbs the heat of the refrigerant, the temperature rises to a proper value, and then the fresh air enters the room, so that the indoor air comfort level is improved.

When the indoor temperature is low and the temperature of the fresh air is moderate, the fresh air needs to be subjected to energy-saving dehumidification and reheating. At this point, the first compressor 16 and the solenoid valve 22 are closed, the first throttle device 12 is opened, and the heat pipe ventilator starts a heat pipe heat recovery cycle and simultaneously turns on the dehumidification module 8.

When the indoor temperature and the fresh air temperature are both lower, dehumidification reheating of the fresh air needs to be reduced. At this time, the first compressor 16 is controlled to be turned on, and the electromagnetic valve 22 and the first throttling device 12 are opened, so that the heat pipe ventilator starts the heat pump heat recovery cycle and the dehumidification module 8 is turned off. After the first compressor 16 is started, the sucked medium-temperature low-pressure gaseous refrigerant is compressed and converted into a high-temperature high-pressure gaseous refrigerant, and after the high-temperature high-pressure gaseous refrigerant is discharged from the first compressor 16, the high-temperature high-pressure gaseous refrigerant passes through the second check valve 21 and is then introduced into the first heat exchanger 5. The first heat exchanger 5 is arranged in the exhaust air duct 2, the exhaust air temperature passing through the exhaust air duct 2 is low due to low indoor temperature, and the high-temperature and high-pressure gaseous refrigerant transfers heat to the exhaust air outside the first heat exchanger 5 and then liquefies, so that the temperature is reduced; the fresh air with lower temperature is utilized to cool the high-temperature refrigerant, so that heat recovery is realized, and the energy utilization rate is improved. The refrigerant with the reduced temperature is led out of the first heat exchanger 5 and then enters the second heat exchanger 6, heat is transferred to fresh air outside the second heat exchanger 6, the temperature is further reduced, and after the refrigerant flows through the first throttling device 12, the refrigerant is changed from high pressure to low pressure, and the temperature is further reduced. And then, a refrigerant enters a third heat exchanger 7, the third heat exchanger 7 is arranged at a fresh air inlet, and after the heat of fresh air outside the third heat exchanger 7 is absorbed, the low-temperature and low-pressure liquid refrigerant is converted into a medium-temperature and low-pressure gaseous refrigerant. Since the first compressor 16 is turned on, the electromagnetic valve 22 is in an open state, and the pressure on the outlet side of the first compressor 16 is higher than the pressure on the inlet side of the first compressor 16, the refrigerant does not pass through the first check valve 20, and the intermediate-temperature low-pressure gaseous refrigerant is introduced out of the third heat exchanger 7, sucked by the first compressor 16, and subjected to the next cycle. The third heat exchanger 7, the dehumidification module 8 and the second heat exchanger 6 are sequentially arranged in the fresh air duct 1, and the third heat exchanger 7 is located at an inlet of the fresh air duct 1. When the low-temperature fresh air enters the fresh air duct 1, the temperature of the low-temperature fresh air is further reduced after the low-temperature fresh air passes through the third heat exchanger 7 and heat is transferred to the refrigerant. Because the initial temperature of the fresh air is lower, after the fresh air is further cooled by the third heat exchanger 7, the fresh air is not required to consume energy and is cooled and dehumidified, and the dehumidification module 8 is closed. And finally, when the air passes through the second heat exchanger 6, the fresh air absorbs the heat of the refrigerant, and the air enters the room after the temperature is raised to a proper value, so that the indoor air comfort level is improved.

When the indoor temperature is higher, need carry out the dehumidification cooling to the new trend. At this point, the first compressor 16 is turned off, the solenoid valve 22 is opened, and the dehumidification module 8 is turned on. Since the electromagnetic valve 22 is opened, the refrigerant flowing out of the third heat exchanger 7 cannot flow into the first heat exchanger 5 by a pressure difference, and the heat pipe circulation of the heat pipe ventilator is interrupted. When the fresh air passes through the fresh air duct 1, the third heat exchanger 7 and the second heat exchanger 6 do not perform heat exchange work because the refrigerant cannot complete circulation. Because dehumidification module 8 is in the open mode, the new trend passes through during dehumidification module 8, temperature and humidity all reduce, it is indoor to get into afterwards, improves indoor air comfort level.

Referring to fig. 2, in view of this, in another embodiment, the fresh air system further includes a fifth heat exchanger 9, the fifth heat exchanger 9 is disposed in the fresh air duct and is located downstream of the second heat exchanger 6 in the fresh air flow direction, and the fifth heat exchanger 9 can heat the fresh air. The fifth heat exchanger 9 is provided with a hot water inlet and a hot water outlet, the heat source for reheating the fresh air by the fifth heat exchanger 9 is hot water, the hot water circularly flows in the fifth heat exchanger 9 through an external hot water source, and the effect of continuously reheating the fresh air is achieved. An electric heating device can also be arranged in the fifth heat exchanger 9, and when the fifth heat exchanger 9 is started, the electric heating device starts to be electrified and generates heat, and the heat is transferred to fresh air, so that the effect of reheating the fresh air is achieved.

Referring to fig. 3, in another embodiment, the dehumidification module 8 includes a seventh heat exchanger 11, a third compressor 18 and a fourth throttling device 15, the third compressor 18, the seventh heat exchanger 11, the fourth throttling device 15 and the fourth heat exchanger 81 are sequentially connected by a pipeline to form a circulation loop, wherein the fourth heat exchanger 81 is disposed in the fresh air duct, and the cold source for cooling and dehumidifying by the dehumidification module 8 is a refrigerant. The third compressor 18 converts the refrigerant into a high-temperature and high-pressure gas state, and then the gas state flows into the seventh heat exchanger 11, and the seventh heat exchanger 11 may be placed outdoors, so that the temperature of the refrigerant is reduced after heat is transferred to outdoor air. After flowing out of the seventh heat exchanger 11, the refrigerant is changed into a low-temperature and low-pressure state after passing through the fourth throttling device 15, and then flows into the fourth heat exchanger 81, the low-temperature and low-pressure refrigerant absorbs heat of fresh air and is gasified, and the gaseous refrigerant is led out of the fourth heat exchanger 81 and is sucked by the third compressor 18 to perform the next cycle.

Referring to fig. 4, in view of this, in another embodiment, the dehumidifying module 8 can cool and dehumidify the fresh air, the fifth heat exchanger 9 can reheat the fresh air, and the dehumidifying module 8 and the fifth heat exchanger 9 are communicated with each other and can form a heat cycle after other devices are added. In view of this, in an embodiment, the dehumidification module 8 is a fourth heat exchanger 81, the heat pipe ventilator further includes a sixth heat exchanger 10, a second compressor 17, and a second throttling device 13, the second compressor 17, the sixth heat exchanger 10, a fifth heat exchanger 9, the second throttling device 13, and the fourth heat exchanger 81 are sequentially connected through a pipeline to form a circulation loop, and the fifth heat exchanger 9 reheats the fresh air through refrigerant circulation. The second compressor 17 converts the refrigerant into a high-temperature and high-pressure gas state, and then the gas state flows into the sixth heat exchanger 10, and the sixth heat exchanger 10 can be placed outdoors, so that the temperature of the refrigerant is reduced after heat is transferred to outdoor air. After flowing out of the sixth heat exchanger 10, the refrigerant flows into the fifth heat exchanger 9, heat is transferred to fresh air through the refrigerant of the fifth heat exchanger 9, and the fresh air is reheated to an appropriate temperature and then is sent into a room. After flowing out of the fifth heat exchanger 9, the refrigerant is changed into a low-temperature and low-pressure state through the second throttling device 13, and then flows into the fourth heat exchanger 81, the low-temperature and low-pressure refrigerant absorbs heat of fresh air and is gasified, moisture content of the fresh air is reduced in the heat absorption process, and gaseous refrigerant is led out of the fourth heat exchanger 81 and is absorbed by the second compressor 17 to perform the next cycle.

On the basis of the above embodiment, further, a third throttling device 14 is further disposed between the fifth heat exchanger 9 and the sixth heat exchanger 10. When the third throttling device 14 is opened but not throttled and the second throttling device 13 is opened and throttled, the heat pump system formed between the fourth heat exchanger 81 and the fifth heat exchanger 9 performs the dehumidification and reheating functions on the fresh air, as in the previous embodiment. When the third throttling device 14 is opened and performs throttling function, and the second throttling device 13 is not opened and performs throttling function, the refrigerant flowing out of the sixth heat exchanger 10 becomes a low-temperature state after passing through the three-stage device, and then flows into the fifth heat exchanger 9. At this time, the fifth heat exchanger 9 plays a role in cooling the fresh air, and a heat pump system formed between the fourth heat exchanger 81 and the fifth heat exchanger 9 plays a role in cooling and dehumidifying the fresh air. By additionally arranging the third throttling device 14, a heat pump system formed between the fourth heat exchanger 81 and the fifth heat exchanger 9 can switch the dehumidification reheating function and the cooling dehumidification function, so that the applicable range is widened.

The heat pipe fresh air machine can dehumidify the fresh air, and the third heat exchanger 7 and the second heat exchanger 6 are not suitable for a hybrid heat exchanger for changing the humidity of the fresh air after heat exchange so as to avoid the change of the humidity after the fresh air is in mixed contact with a refrigerant. Typically, the second heat exchanger 6 and the third heat exchanger 7 are regenerative heat exchangers or recuperative heat exchangers or a combination of both. In an embodiment, the second heat exchanger 6 and the third heat exchanger 7 are plate heat exchangers, and the plate heat exchangers have high heat exchange efficiency, small heat loss, compact and light structure, small occupied area, convenient installation and cleaning, wide application and long service life.

Further, based on any one of the above embodiments, in the embodiment of the present invention, the heat pipe fresh air blower may further include a control device. Referring to fig. 5, both the heat exchange module 01 and the dehumidification module 8 may be connected to a control device. Specifically, the heat exchange module 01, the dehumidification module 8 and other components can be connected with a control device, and the control device can be used for controlling the operation of the heat exchange module 01, the dehumidification module 8 and other components.

Further, the heat pipe fresh air fan may further include a temperature detection module 02 and/or a humidity detection module 03. The temperature detection module 02 can be used for detecting relevant temperature data required by operation regulation of the heat pipe fresh air machine. The temperature detection module 03 can be used for detecting relevant humidity data required by operation regulation of the heat pipe fresh air fan. The temperature detection module 02 and/or the humidity detection module 03 are connected with the control device, and the control device can be used for acquiring data detected by the temperature detection module 02 and/or the humidity detection module 03. Specifically, the temperature detection module 02 and the detection module 03 can be disposed at the outlet of the fresh air duct 1, the inlet of the fresh air duct 1, the indoor environment in front of the second heat exchanger 6 and the dehumidification module 8 in the fresh air duct 1, the indoor environment under the action of the heat pipe fresh air blower, the inlet of the exhaust air duct and/or the outlet of the exhaust air duct, and the like.

In the embodiment of the present invention, referring to fig. 5, the control device of the heat pipe ventilator includes: a processor 1001 (e.g., CPU), memory 1002, timer 1003, and the like. The memory 1002 may be a high-speed RAM memory or a non-volatile memory (e.g., a disk memory). The memory 1002 may alternatively be a storage device separate from the processor 1001.

Those skilled in the art will appreciate that the configuration of the device shown in fig. 5 is not intended to be limiting of the device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

As shown in fig. 5, a control program of the heat pipe ventilator may be included in the memory 1002 as a computer-readable storage medium. In the apparatus shown in fig. 5, the processor 1001 may be configured to call a control program of the heat pipe ventilator stored in the memory 1002, and perform operations of relevant steps of the control method of the heat pipe ventilator in the following embodiments.

The embodiment of the invention also provides a control method of the heat pipe fresh air machine, which is applied to control the heat pipe fresh air machine.

Referring to fig. 6, an embodiment of a method for controlling a heat pipe ventilator according to the present application is provided. In this embodiment, the method for controlling the heat pipe ventilator includes:

step S10, obtaining characteristic temperature, wherein the characteristic temperature represents the temperature regulation requirement of fresh air;

the characteristic temperature can be the air temperature detected by the heat pipe fresh air machine or the air temperature detected by the indoor environment acted by the heat pipe fresh air machine.

In an embodiment, the fresh air outlet temperature of the heat pipe fresh air machine is obtained, and the characteristic temperature includes the fresh air outlet temperature.

In another embodiment, the ambient temperature of the space acted by the heat pipe fresh air fan is obtained, and the characteristic temperature comprises the ambient temperature.

In another embodiment, the exhaust air temperature of the heat pipe ventilator is obtained, and the characteristic temperature includes the exhaust air temperature.

In yet another embodiment, a coil temperature of the second heat exchanger is obtained, and the characteristic temperature includes the coil temperature.

In still another embodiment, at least two of the fresh air outlet temperature, the ambient temperature, the exhaust air temperature and the coil temperature are acquired as target temperatures, and the characteristic temperature is calculated according to the at least two target temperatures.

Any one of the characteristic temperatures mentioned here can realize accurate representation of the fresh air temperature regulation requirement. The higher the characteristic temperature is, the smaller the demand for fresh air temperature regulation is; rather, the lower the characteristic temperature, the greater the fresh air temperature regulation requirement.

Step S20, determining target control parameters of the heat exchange module according to the characteristic temperature;

the target control parameters are specifically operation control parameters of related parts of the heat pipe fresh air machine for regulating and controlling the fresh air heating quantity of the heat exchange module.

The target control parameter may be a target temperature value of a related component for adjusting the temperature of the fresh air (e.g., a target value of a coil temperature of the second heat exchanger or a minimum temperature value allowed by a coil temperature of the third heat exchanger), and the target control parameter may also be an operation parameter of the related component for adjusting the temperature of the fresh air, such as an operation rotation speed of a fan (e.g., a rotation speed of a fresh air fan and/or a rotation speed of an exhaust fan) affecting the temperature adjustment efficiency, an opening degree of the first throttling device, a frequency control parameter of the compressor (e.g., a target frequency value or a frequency adjustment direction), an on or off state of the compressor, and/or an on or off state of the electromagnetic valve. In this embodiment, the target control parameter may include one or more than one of the parameters mentioned herein, and it is only necessary to ensure that the heat exchange amount supplied by the second heat exchanger is accurately matched with the actual temperature regulation requirement of the current fresh air when the operation of the heat exchange module is controlled according to the target control parameter.

And if the characteristic temperatures are different, the target control parameters are different, and if the target control parameters are different, the heat supplied by the heat exchange module to the fresh air in the fresh air duct is different. Specifically, a corresponding relationship between the characteristic temperature and the target control parameter may be established in advance, and the control parameter corresponding to the current characteristic temperature may be determined as the target control parameter according to the corresponding relationship. For example, the target temperature of the corresponding characteristic temperature can be determined based on indoor comfort requirements, the characteristic temperature is divided into at least two preset temperature intervals based on the target temperature, different target control parameters can be correspondingly set in the preset temperature intervals of different characteristic temperatures, the adjusting directions of the heat exchange amount of the second heat exchanger corresponding to different target control parameters are different, based on the different target control parameters, the temperature interval in which the characteristic temperature is located is determined, the control parameter corresponding to the temperature interval can be obtained to serve as the target control parameter, and the heat exchange amount of the second heat exchanger can be changed according to the adjusting direction of the corresponding heat exchange amount in the process that the obtained target control parameter controls the operation of the heat exchange module; for another example, when the target control parameter is an operation parameter of a component such as a compressor frequency or an opening degree of the first throttling device, a quantity relationship between the characteristic temperature and an operation parameter of a fresh air temperature adjusting component in the heat exchange module can be pre-established, when the number of the component is more than one, each component corresponds to one quantity relationship, and the operation parameter of the corresponding fresh air temperature adjusting component can be obtained through calculation based on the current characteristic temperature.

And step S30, controlling the heat exchange module to operate according to the target control parameter so as to enable the heat exchange quantity of the second heat exchanger to be matched with the temperature regulation requirement.

It should be noted that, in this embodiment, in the fresh air mode, outdoor fresh air enters the fresh air duct, is dehumidified by the dehumidification module after being subjected to heat exchange by the third heat exchanger, is heated by the second heat exchanger after being dehumidified by the dehumidification module, and the fresh air heated by the second heat exchanger can be directly or further heated and then sent to the indoor environment. When the heat pipe fresh air fan is provided with a compressor and an electromagnetic valve connected with the compressor in series, and the target control parameters comprise the operation parameters of the compressor and/or the electromagnetic valve, the compressor and/or the electromagnetic valve operate according to the corresponding parameters in the target control parameters; when the target control parameters do not comprise the operation parameters of the compressor, the compressor can be started or closed; and when the target control parameters do not comprise the operation parameters of the electromagnetic valve, the electromagnetic valve can be opened or closed.

The matching of the heat exchange quantity of the second heat exchanger and the temperature regulation requirement can be understood as follows: when the temperature regulation requirement is small (namely the characteristic temperature is high, for example, the characteristic temperature is greater than the second set temperature or greater than the first set temperature), reducing the heat exchange quantity of the second heat exchanger, wherein the heat exchange quantity of the second heat exchanger is matched with the temperature regulation requirement; when the temperature regulation requirement is large (namely the characteristic temperature is low, for example, the characteristic temperature is lower than the second set temperature), the heat exchange quantity of the second heat exchanger is increased, and at the moment, the heat exchange quantity of the second heat exchanger is matched with the temperature regulation requirement.

The invention provides a control method of a heat pipe fresh air machine, the heat pipe fresh air machine is provided with a first heat exchanger in an exhaust air duct, a third heat exchanger, a dehumidification module and a second heat exchanger are arranged on a fresh air flow path for the first time, the first heat exchanger, the second heat exchanger, a first throttling device and the third heat exchanger are sequentially connected in series to form a first loop, wherein the first heat exchanger can recover sensible heat of exhaust air in the exhaust air duct, a refrigerant after sensible heat recovery in the first loop further enters the second heat exchanger to heat the dehumidified fresh air so as to realize dehumidification and reheating of the fresh air, and based on the heat pipe fresh air machine, the method adjusts a target control parameter of the heat exchange module based on a characteristic temperature representing actual heating demand of the fresh air instead of adjusting and controlling the heating quantity of the heat exchange module according to a preset fixed parameter, thereby ensuring that the fresh air module comprising the first loop flows into the second heat exchange module after sensible heat recovery in the exhaust air duct The refrigerant of calorimeter, its heat transfer volume can be with the accurate matching of the actual temperature regulation demand of new trend to improve the accurate nature of new trend air-out temperature regulation, reduce the air-out temperature fluctuation of the new fan of heat pipe, improve indoor user's travelling comfort.

Further, based on any one of the above embodiments, another embodiment of the control method of the heat pipe fresh air machine is provided. In this embodiment, referring to fig. 7, the step of determining the target control parameter of the heat exchange module according to the characteristic temperature includes:

step S21, when the characteristic temperature is larger than or equal to a first set temperature, determining a first control parameter as the target control parameter; the first control parameter is used for stopping the heat exchange of the second heat exchanger;

in this embodiment, the heat exchange module further includes the solenoid valve, a compressor, and a first check valve disposed between a refrigerant outlet of the second heat exchanger and a refrigerant inlet of the third heat exchanger, the compressor is connected in parallel with the first check valve, the solenoid valve is connected in series with the compressor, and the first control parameter includes one of the following parameters:

turning off the compressor and turning off the first throttling device;

the compressor is closed and the solenoid valve is opened.

Specifically, when the compressor and the first throttling device are both closed, the closing of the first throttling device blocks the refrigerant from circularly flowing in the first loop, and the second heat exchanger stops heating the fresh air. In addition, when the compressor is closed and the electromagnetic valve is opened, the pressure difference between two sides of the first one-way valve is 0, the refrigerant stops flowing from one side of the first one-way valve to the other side, the refrigerant in the first loop stops circulating flow, and the second heat exchanger cannot further heat fresh air.

In other embodiments, the first control parameter may also include closing the first throttling device when the compressor and its solenoid valve are not provided in series.

When the characteristic temperature is higher than the first set temperature, the condition that the current fresh air outlet temperature is seriously higher or the fresh air does not have the temperature rise requirement is indicated, the heat exchange module is controlled to operate according to the first control parameter, the fresh air temperature is favorably and quickly reduced, the indoor temperature is avoided being overhigh, and the indoor user comfort is effectively improved in the fresh air mode.

Step S22, when the characteristic temperature is greater than a second set temperature and less than the first set temperature, determining a second control parameter as the target control parameter; the second control parameter is used for reducing the heat exchange quantity of the second heat exchanger, and the second set temperature is smaller than the first set temperature;

the second set temperature is specifically a target temperature value which is required to be reached by the characteristic temperature required by the indoor comfortable state in the fresh air mode. The temperature deviation between the first set temperature and the second set temperature is greater than a set threshold. The heat exchange quantity of the second heat exchanger represents the heat exchange quantity of the second heat exchanger and the air with unit volume, and under the same condition, the larger the heat exchange quantity of the second heat exchanger is, the larger the temperature rise of the air passing through the second heat exchanger is; under the same condition, the smaller the heat exchange quantity of the second heat exchanger is, the smaller the temperature rise of the air passing through the second heat exchanger is.

In this embodiment, the heat exchange module further includes an electromagnetic valve, a compressor, and a first check valve disposed between a refrigerant outlet of the third heat exchanger and a refrigerant inlet of the first heat exchanger, the compressor is connected in parallel with the first check valve, the electromagnetic valve is connected in series with the compressor, the heat exchange module further includes an exhaust fan disposed in the exhaust air duct, and the second control parameter includes at least one of the following parameters:

the parameter 1 is that the running rotating speed of the exhaust fan is increased;

parameter 2, controlling the compressor to switch from an open state to a closed state, controlling the electromagnetic valve to switch from an open state to a closed state, and controlling the first throttling device to maintain the open state;

and 3, controlling the compressor to maintain a closed state, and controlling the electromagnetic valve to be switched from the closed state to the open state or controlling the first throttling device to be switched from the open state to the closed state.

Specifically, the second control parameter may be parameter 1, parameter 2, or parameter 3; the second control parameter may also be parameter 1 and parameter 3; the second control parameter may also be parameter 1 and parameter 2.

The operation rotating speed of the exhaust fan in the parameter 1 can be increased according to a preset fixed adjusting parameter, and the operation rotating speed of the exhaust fan can also be increased according to an adjusting parameter determined by the actual operation condition of the heat pipe fresh fan. In this embodiment, the rotation speed increase range can be determined according to the exhaust air temperature, the fresh air temperature, the first coil temperature of the first heat exchanger, the second coil temperature of the second heat exchanger, and the second set temperature, and the exhaust air fan is controlled to increase the operation rotation speed according to the determined rotation speed increase range. The improvement of the running rotating speed of the air exhaust fan can improve the heat exchange quantity of the first heat exchanger and effectively reduce the reheat of the second heat exchanger, thereby realizing the reduction of the air outlet temperature of fresh air.

Specifically, when the compressor is currently in an open state, the electromagnetic valve is currently in an open state, and the first throttling device is currently in an open state, the heat pipe fresh air fan is in a heat pump circulation state: high-temperature and high-pressure refrigerant is discharged from an exhaust port of the compressor and sequentially flows through the first heat exchanger and the second heat exchanger to exchange heat, sensible heat in indoor discharge outdoor air can be recovered by the first heat exchanger to achieve energy conservation, heat is released in the second heat exchanger to heat fresh air in a fresh air duct, and the refrigerant flowing out of the second heat exchanger sequentially flows through the first throttling device and the third heat exchanger and then flows back to a return air port of the compressor through the electromagnetic valve. When the compressor is currently in a closed state, the electromagnetic valve is currently in a closed state, and the first throttling device is currently in an open state, the heat pipe fresh air fan is in a heat pipe circulation state: the refrigerant in the first loop does not enter the compressor any more to be compressed when the compressor and the electromagnetic valve are closed, a certain pressure difference is formed between two sides of the first one-way valve when the electromagnetic valve is closed, the refrigerant flows to the other side of the first one-way valve from one side of the first one-way valve under the driving of the certain pressure difference, the refrigerant circularly flows in the first loop, and the refrigerant heats the fresh air in the fresh air duct when flowing into the second heat exchanger. The heat exchange amount of the second heat exchanger under the heat pump circulation is larger than that of the second heat exchanger under the heat pipe circulation.

The parameter 2 is specifically a control parameter for converting the heat pipe fresh air machine from the heat pump cycle to the heat pipe cycle. Specifically, when the compressor is currently in an on state, the electromagnetic valve is currently in an on state, and the first throttling device is currently in an on state, the parameter 2 may be determined as the second control parameter.

The parameter 3 is specifically a control parameter for converting the heat pipe fresh air machine from the heat pipe circulation to the second heat exchanger to stop heat exchange. Specifically, when the compressor is currently in the closed state, the electromagnetic valve is currently in the closed state, and the first throttling device is currently in the open state, the parameter 3 may be determined as the second control parameter. When the compressor is closed, the electromagnetic valve is switched from closed to open, so that the pressure difference between two ends of the first one-way valve is 0, a refrigerant cannot flow through the first one-way valve under the action of no pressure difference, and the refrigerant in the first loop cannot circularly flow; when the compressor is closed, the first throttling device is closed, the flow of the refrigerant in the first loop is blocked, and the refrigerant in the first loop cannot flow circularly. Under the two conditions, the second heat exchanger stops exchanging heat to the fresh air in the fresh air duct.

In other embodiments, the second control parameter may also include the first throttle increasing the opening degree, etc., when the compressor is currently in the heat pump cycle.

When the characteristic temperature is higher than the second set temperature and is less than or equal to the first set temperature, the current fresh air outlet temperature is higher, the heat exchange module is controlled to operate according to the second control parameter, the heat exchange quantity of the second heat exchanger is reduced to reduce the fresh air outlet temperature, and the fresh air outlet temperature can reach a comfortable state of indoor requirements.

Step S23, when the characteristic temperature is smaller than the second set temperature, determining a third control parameter as the target control parameter, wherein the third control parameter is used for increasing the heat exchange quantity of the second heat exchanger.

In this embodiment, the heat exchange module further includes an electromagnetic valve, a compressor, and a first check valve disposed between a refrigerant outlet of the third heat exchanger and a refrigerant inlet of the first heat exchanger, the compressor is connected in parallel with the first check valve, the electromagnetic valve is connected in series with the compressor, the heat exchange module further includes an air exhaust fan disposed in the air exhaust duct, and the third control parameter includes at least one of the following parameters:

parameter 4, reducing the running rotating speed of the exhaust fan;

the parameter 5 controls the compressor to be switched from a closed state to an open state, controls the electromagnetic valve to be switched from the closed state to the open state, and controls the first throttling device to maintain the open state;

parameter 6, controlling the compressor to maintain a closed state, controlling the electromagnetic valve to switch from an open state to a closed state, and controlling the first throttling device to maintain an open state;

and 7, controlling the compressor to maintain a closed state, controlling the electromagnetic valve to maintain a closed state, and controlling the first throttling device to be switched from the closed state to an open state.

Specifically, the third control parameter may be parameter 4, parameter 5, parameter 6, or parameter 7; the third control parameter may also be parameter 4 and parameter 5; the third control parameter may also be parameter 4 and parameter 6; the third control parameter may also be parameter 4 and parameter 7.

In the parameter 4, the operation rotating speed of the exhaust fan can be reduced according to a preset fixed adjusting parameter, and the operation rotating speed of the exhaust fan can also be reduced according to an adjusting parameter determined by the actual operation condition of the heat pipe fresh air fan. In this embodiment, the rotation speed reduction range may be determined according to the exhaust air temperature, the fresh air temperature, the first coil temperature of the first heat exchanger, the second coil temperature of the second heat exchanger, and the second set temperature, and the exhaust air fan may be controlled to reduce the operation rotation speed according to the determined rotation speed reduction range. The reduction of the running rotating speed of the air exhaust fan can reduce the heat exchange quantity of the first heat exchanger and effectively improve the reheat of the second heat exchanger, thereby realizing the improvement of the air outlet temperature of fresh air.

The parameter 5 is specifically a control parameter for converting the heat pipe fresh air machine from the heat pipe cycle to the heat pump cycle. Specifically, when the compressor is currently in the closed state, the electromagnetic valve is currently in the closed state, and the first throttling device is currently in the open state, the parameter 5 may be determined as the third control parameter.

The parameter 6 and the parameter 7 are specifically control parameters for converting the second heat exchanger from stopping heat exchange into heat pipe circulation. Specifically, when the compressor is currently in the closed state, the electromagnetic valve is currently in the open state, and the first throttling device is opened, the parameter 6 may be determined as the third control parameter; alternatively, the parameter 7 may be determined as the third control parameter when the compressor is currently in the off state, the first throttle device is closed, and the solenoid valve is closed. When the compressor is closed, the electromagnetic valve is switched from open to closed, the pressure difference between two ends of the first one-way valve is switched to be 0, and the first one-way valve has a certain pressure difference, and a refrigerant is driven to flow through the first one-way valve under the action of the certain pressure difference, so that the refrigerant in the first loop is driven to circularly flow; when the compressor is closed, the first throttling device is switched from closed to open, and the electromagnetic valve is kept in a closed state, so that the refrigerant is allowed to circularly flow in the first loop. Under the two conditions, the refrigerant in the first loop can be switched from the state of stopping flowing to the state of heat pipe circulation, so that the heat exchange quantity of the second heat exchanger is increased.

In other embodiments, the third control parameter may also be determined to be turning on the compressor, turning off the solenoid valve, and opening the first throttle when the compressor is off.

When the characteristic temperature is lower than the second set temperature, the current fresh air outlet temperature is lower, the heat exchange module is controlled to operate according to the third control parameter, the heat exchange quantity of the second heat exchanger is increased to improve the fresh air outlet temperature, and the fresh air outlet temperature can reach a comfortable state of indoor requirements.

In this embodiment, the characteristic temperature adopts different control parameter control heat exchange module operation when in different temperature intervals to the realization is adapted to actual new trend temperature regulation demand and adjusts the second with new trend air-out temperature accurately and sets for the temperature, guarantees that new trend air-out temperature can satisfy indoor comfortable demand.

Further, based on any one of the above embodiments, another embodiment of the control method of the heat pipe fresh air machine is provided. In this embodiment, the heat exchange module further includes an electromagnetic valve, a compressor, and a first check valve disposed between a refrigerant outlet of the third heat exchanger and a refrigerant inlet of the first heat exchanger, the compressor is connected in parallel with the first check valve, the electromagnetic valve is connected in series with the compressor, and referring to fig. 8, the method for controlling the heat pipe fresh air machine further includes:

step S01, when the dehumidification and reheating mode is started, the dehumidification module is controlled to be started, the compressor is controlled to be closed, the electromagnetic valve is controlled to be closed, and the first throttling device is controlled to be opened;

step S02, when the dehumidification module is in an open state, the compressor is in a closed state, the electromagnetic valve is in a closed state, and the first throttling device is in an open state, executing the step of obtaining the characteristic temperature.

The dehumidification reheating mode is an air conditioner operation mode which firstly cools and dehumidifies the fresh air and then reheats the cooled and dehumidified fresh air.

In this embodiment, when dehumidification reheat mode starts, according to the operation of above-mentioned mode, make the new fan of heat pipe realize the reheat dehumidification of new trend earlier energy-conservingly through the mode of heat pipe circulation earlier to further regulate and control new trend air-out temperature through other modes when the characteristic temperature under the heat pipe circulation can't satisfy comfortable demand, thereby guarantee that new trend air-out temperature further reduces the energy that the new fan of heat pipe consumed when accurately satisfying indoor comfortable demand.

In other embodiments, the method for controlling the heat pipe ventilator further includes: when the dehumidification reheating mode is started, the dehumidification module is controlled to be started, the compressor is controlled to be started, the electromagnetic valve is controlled to be started, and the first throttling device is controlled to be opened; and when the dehumidification module is in an opening state, the compressor is in an opening state, the electromagnetic valve is in an opening state and the first throttling device is in an opening state, executing the step of acquiring the characteristic temperature. The dehumidification reheating mode is an air conditioner operation mode which firstly cools and dehumidifies the fresh air and then reheats the cooled and dehumidified fresh air. Here when dehumidification reheat mode starts, earlier carry out reheat dehumidification to the new trend in order to provide great heat transfer volume earlier through heat pump cycle's mode to guarantee that the new trend can reach the comfortable demand of high enough air-out temperature satisfying indoor temperature, further carry out accurate regulation and control to new trend air-out temperature through other modes when the characteristic temperature can't satisfy comfortable demand under the heat pump cycle again, thereby guarantee the accurate matching of new trend air-out temperature and indoor comfortable demand.

In addition, an embodiment of the present invention further provides a computer-readable storage medium, where a control program of the heat pipe ventilator is stored in the computer-readable storage medium, and when the control program of the heat pipe ventilator is executed by a processor, the relevant steps of any of the above methods for controlling a heat pipe ventilator are implemented.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention or portions thereof contributing to the prior art may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) as described above and includes several instructions for enabling a terminal device (which may be a mobile phone, a computer, a server, a heat pipe ventilator, or a network device) to execute the method according to the embodiments of the present invention.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The control method of the heat pipe fresh air machine is characterized in that the heat pipe fresh air machine comprises a fresh air duct, an exhaust air duct, a heat exchange module and a dehumidification module, the heat exchange module comprises a first loop, the first loop comprises a first heat exchanger, a second heat exchanger, a first throttling device and a third heat exchanger which are sequentially connected, the first heat exchanger is arranged in the exhaust air duct, the third heat exchanger, the dehumidification module and the second heat exchanger are sequentially arranged in the fresh air duct along a fresh air flow path, the dehumidification module is independent of the arrangement of the first loop, and the control method of the heat pipe fresh air machine comprises the following steps:

determining a target control parameter of the heat exchange module according to the characteristic temperature;

2. The method of claim 1, wherein the step of determining the target control parameter of the heat exchange module based on the characteristic temperature comprises:

3. The method for controlling a heat pipe ventilator according to claim 2, wherein the heat exchange module further includes a solenoid valve, a compressor, and a first check valve disposed between a refrigerant outlet of the third heat exchanger and a refrigerant inlet of the first heat exchanger, the compressor is connected in parallel with the first check valve, the solenoid valve is connected in series with the compressor, and the first control parameter includes one of the following parameters:

turning off the compressor and turning off the first throttling device;

the compressor is closed and the solenoid valve is opened.

4. The method of claim 2, wherein the heat exchange module further comprises a solenoid valve, a compressor, and a first check valve disposed between a refrigerant outlet of the third heat exchanger and a refrigerant inlet of the first heat exchanger, the compressor is connected in parallel with the first check valve, the solenoid valve is connected in series with the compressor, the heat exchange module further comprises an exhaust fan disposed in the exhaust air duct, and the second control parameter comprises at least one of the following parameters:

increasing the running speed of the exhaust fan;

5. The method of claim 2, wherein the heat exchange module further comprises a solenoid valve, a compressor, and a first check valve disposed between a refrigerant outlet of the third heat exchanger and a refrigerant inlet of the first heat exchanger, the compressor is connected in parallel with the first check valve, the solenoid valve is connected in series with the compressor, the heat exchange module further comprises an exhaust fan disposed in the exhaust air duct, and the third control parameter comprises at least one of the following parameters:

reducing the running rotating speed of the exhaust fan;

6. The method according to any one of claims 1 to 5, wherein the heat exchange module further includes a solenoid valve, a compressor, and a first check valve disposed between a refrigerant outlet of the third heat exchanger and a refrigerant inlet of the first heat exchanger, the compressor is connected in parallel with the first check valve, the solenoid valve is connected in series with the compressor, and the method further includes:

7. A control method for a heat pipe ventilator as defined in any one of claims 1 to 5, wherein said step of obtaining a characteristic temperature comprises:

or acquiring the exhaust air temperature of the heat pipe fresh air machine, wherein the characteristic temperature comprises the exhaust air temperature;

8. The utility model provides a new fan of heat pipe which characterized in that, new fan of heat pipe includes:

a fresh air duct;

an air exhaust duct;

controlling means, heat transfer module with the dehumidification module all with controlling means connects, controlling means includes: a memory, a processor and a control program of the heat pipe ventilator stored on the memory and operable on the processor, wherein the control program of the heat pipe ventilator when executed by the processor implements the steps of the control method of the heat pipe ventilator according to any one of claims 1 to 7.

9. A heat pipe ventilator as defined in claim 8, further comprising:

a compressor connected in parallel with the first check valve; and

a solenoid valve connected in series with the compressor;

10. A computer-readable storage medium, wherein a control program of a heat pipe ventilator is stored on the computer-readable storage medium, and when executed by a processor, the control program of the heat pipe ventilator implements the steps of the control method of the heat pipe ventilator according to any one of claims 1 to 7.