CN210569064U

CN210569064U - Heat recovery unit

Info

Publication number: CN210569064U
Application number: CN201921357285.9U
Authority: CN
Inventors: 戚新秋
Original assignee: Shanghai Landleaf Building Technology Co ltd
Current assignee: Shanghai Landleaf Building Technology Co ltd
Priority date: 2019-08-19
Filing date: 2019-08-19
Publication date: 2020-05-19
Anticipated expiration: 2029-08-19

Abstract

The utility model discloses a heat recovery unit, include: the first air box and the second air box are arranged in parallel, an air supply channel is formed in the first air box, and an air return channel is formed in the second air box; one end of the rotating wheel is arranged in the first air box, the other end of the rotating wheel is arranged in the second air box, and the rotating wheel is used for transmitting the cold energy or the heat energy of the return air in the return air channel to the supplied air; the first sensor is arranged in the first air box and used for detecting the air supply temperature; the second sensor is arranged in the first air box and used for detecting the air temperature after heat exchange through the rotating wheel; and the third sensor is arranged at the front part of the rotating wheel in the second air box and used for detecting the return air temperature. The utility model discloses a temperature parameter that three sensor measurement obtained obtains real-time heat recovery efficiency and calculates with the energy consumption, and according to the rotational speed of real-time heat recovery efficiency timely adjustment runner, still can in time wash the runner when the runner appears filthy stifled to the reduce system energy consumption.

Description

Heat recovery unit

Technical Field

The utility model belongs to the technical field of air conditioning, in particular to heat recovery unit.

Background

The fresh air heat recovery unit is a device for reducing indoor cold and heat load by recovering exhaust heat (cold), can introduce fresh outdoor air, greatly reduces energy consumption, and is environment-friendly and energy-saving.

At present, the fresh air heat recovery unit is widely applied to centralized cooling and heating buildings such as markets and office buildings, and the rotary wheel heat recovery mode is widely applied to the fresh air heat recovery unit due to low investment and simple installation and maintenance. But the runner can be dirty and blocked along with the increase of the service time in the working process.

However, the cleaning of the rotating wheels by the operation and maintenance personnel is carried out once in a few years at present, and when the rotating wheels are dirty and blocked, the operation and maintenance personnel cannot know in time, so that the dirty and blocked rotating wheels cannot be cleaned in time, the heat recovery efficiency is continuously reduced, the energy consumption of the system is increased, and the operation cost is increased.

Disclosure of Invention

The utility model aims at providing a heat recovery unit can make things convenient for the staff in time to know the behavior of runner to in time wash the runner, the low system energy consumption.

The utility model provides a technical scheme as follows:

a heat recovery unit comprising:

the air return device comprises a first air box and a second air box which are arranged side by side, wherein an air supply channel is formed in the first air box, and an air return channel is formed in the second air box;

one end of the rotating wheel is arranged in the first air box, the other end of the rotating wheel is arranged in the second air box, and the rotating wheel is used for transmitting the cold energy or the heat energy of the return air in the return air channel to the supplied air;

the first sensor is arranged in the first air box and used for detecting the air supply temperature;

the second sensor is arranged in the first air box and used for detecting the temperature of the air subjected to heat exchange through the rotating wheel;

and the third sensor is arranged at the front part of the rotating wheel in the second air box and used for detecting the return air temperature.

Further, still include:

a controller electrically connected to the first sensor, the second sensor, and the third sensor, respectively;

the controller is used for calculating the working efficiency of the rotating wheel according to the air supply temperature, the air temperature after heat exchange and the return air temperature.

Further, still include:

the variable frequency motor is used for driving the rotating wheel and is electrically connected with the controller;

the controller is used for controlling the rotating speed of the variable frequency motor according to the working efficiency of the rotating wheel.

Further, still include:

the display is electrically connected with the controller and used for displaying the working efficiency of the rotating wheel in real time.

Furthermore, a water outlet which can be opened and closed is arranged on the second air box, the water outlet is arranged above the rotating wheel, and the water outlet is used for spraying cleaning liquid to the rotating wheel when opened.

Further, still include:

the water receiving tray is arranged in the first air box and located below the rotating wheel, and the water receiving tray is used for recovering the cleaning liquid.

Furthermore, an air supply outlet and an air outlet are arranged on the first air box, and the air supply outlet and the air outlet are respectively positioned on two sides of the rotating wheel;

an air return opening is formed in the second air box;

the first sensor is arranged on the inner wall of the first air box and is positioned on one side, close to the air supply outlet, of the rotating wheel;

the second sensor is arranged on the inner wall of the first air box and is positioned on one side, close to the air outlet, of the rotating wheel;

the third sensor is arranged on the inner wall of the second air box and is positioned on one side, close to the air return opening, of the rotating wheel.

Through the utility model provides a pair of heat recovery unit, the beneficial effect that can bring is: the utility model discloses a set up first sensor, second sensor and third sensor in the unit, can calculate heat recovery efficiency according to the temperature parameter that this three sensor measurement obtained, can in time know the behavior of runner according to heat recovery efficiency, can in time wash the runner when the runner appears filthy stifled to the reduce system energy consumption.

Drawings

The above features, technical characteristics, advantages and realisations of a heat recovery unit will be further explained in a clearly understandable way, referring to the following description of a preferred embodiment, in conjunction with the accompanying drawings.

Fig. 1 is a schematic structural view of a heat recovery unit of the present invention;

fig. 2 is a schematic block diagram of the electrical connection of the heat recovery unit of the present invention.

Description of the reference numerals

1. A first windbox; 11. an air supply outlet; 12. an air outlet; 2. a second windbox; 21. an air return opening; 22. a water outlet; 3. a rotating wheel; 4. a first sensor; 5. a second sensor; 6. a third sensor; 7. a controller; 8. a display; 9. a water pan; 10. a variable frequency motor; 11. a server; 12. an electromagnetic valve.

Detailed Description

In order to more clearly illustrate embodiments of the present invention or technical solutions in the prior art, specific embodiments of the present invention will be described below with reference to the accompanying drawings. It is obvious that the drawings in the following description are only examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be obtained from these drawings without inventive effort.

For the sake of simplicity, only the parts relevant to the present invention are schematically shown in the drawings, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".

In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment of the utility model provides a heat recovery unit, please refer to fig. 1, this heat recovery unit includes: the air return device comprises a first air box 1, a second air box 2, a rotating wheel 3, a first sensor 4, a second sensor 5 and a third sensor 6 which are arranged side by side, wherein an air supply channel is formed in the first air box 1, and an air return channel is formed in the second air box 2; fresh air is sent from the air supply channel, and the air return channel recovers the heat or cold of the exhausted air. The air supply channel is also internally provided with conventional components which are required to be contained in a heat recovery unit, such as a fan, a filter screen, a humidifier and the like; the return air channel is internally provided with conventional components which are required to be contained in a heat recovery unit, such as a filter screen, a fan and the like.

The one end of runner 3 sets up in first bellows 1, and the other end of runner 3 sets up in second bellows 2, and runner 3 is used for giving the air supply air with the cold volume or the heat transfer of the return air in the return air passageway to realize that the new trend carries out the heat transfer with the heat or the cold volume of airing exhaust of retrieving.

The first sensor 4 is arranged in the first air box 1, and the first sensor 4 is used for detecting the air supply temperature, namely the fresh air temperature; the second sensor 5 is arranged in the first air box 1, and the second sensor 5 is used for detecting the air temperature after heat exchange through the rotating wheel 3, namely the temperature of fresh air and recovered exhaust air after heat exchange through the rotating wheel 3; the third sensor 6 is provided in the second windbox 2, and the third sensor 6 is used to detect the return air temperature, i.e., the temperature of the recovered exhaust air.

An air supply opening 11 and an air exhaust opening 12 are arranged on the first air box 1, the air supply opening 11 and the air exhaust opening 12 are respectively communicated with an air supply channel, the air supply opening 11 and the air exhaust opening 12 are respectively positioned on two sides of the rotating wheel 3, fresh air is fed from the air supply opening 11, and the air exhaust opening 12 exhausts air indoors. The first sensor 4 is arranged on the inner wall of the first air box 1 and is positioned on one side of the rotating wheel 3 close to the air supply outlet 11; the second sensor 5 is arranged on the inner wall of the first wind box 1 and is positioned on one side of the rotating wheel 3 close to the air outlet 12. An air return opening 21 is formed in the second air box 2, the air return opening 21 recovers exhaust heat, and the air return opening 21 is communicated with an air return channel; the third sensor 6 is arranged on the inner wall of the second wind box 2 and is positioned on one side of the rotating wheel 3 close to the air return opening 21. The distances between the first sensor 4, the second sensor 5 and the third sensor 6 and the rotating wheel 3 are preferably within 5-15cm, so that errors of detecting the supply air temperature, the return air temperature and the air temperature after heat exchange by the sensors are reduced.

in the working process of the rotating wheel 3, the air supply temperature, the air temperature after heat exchange and the air return temperature can be measured by the first sensor 4, the second sensor 5 and the third sensor 6, and the heat recovery efficiency η can be calculated according to the air supply temperature, the air temperature after heat exchange and the air return temperature;

wherein, T1 is the air supply temperature; t2 is the air temperature after heat exchange; t3 is return air temperature.

When the heat recovery unit works, the cold energy or the heat of return air in the return air channel is transferred to the supplied air through the rotation of the rotating wheel 3 to realize the heat exchange between fresh air and return air; therefore, the heat recovery efficiency is the work efficiency of runner 3 promptly, according to heat recovery efficiency, can know the behavior of runner 3, when heat recovery efficiency was very low, then explained runner 3 and dirty stifled has appeared, need wash runner 3.

The first sensor 4, the second sensor 5 and the third sensor 6 can also be temperature and humidity sensors, which not only measure temperature parameters, but also measure humidity, so as to monitor and process sensible heat, latent heat and total heat recovery efficiency in real time.

The utility model discloses a set up first sensor 4, second sensor 5 and third sensor 6 in the unit, can measure the temperature parameter that obtains according to this three sensor and calculate heat recovery efficiency, can in time know the behavior of runner 3 according to heat recovery efficiency, can in time wash runner 3 when runner 3 appears filthy stifled to reduce system's energy consumption.

After the air temperature and the return air temperature after the air supply temperature and the heat exchange are measured through the first sensor 4, the second sensor 5 and the third sensor 6, the heat recovery efficiency can be calculated by the staff, and whether the runner 3 needs to be stopped and cleaned or not is judged by the staff according to the heat recovery efficiency.

In some embodiments of the present invention, referring to fig. 2, the heat recovery unit further comprises a controller 7, the controller 7 being electrically connected to the first sensor 4, the second sensor 5 and the third sensor 6, respectively; the controller 7 is used for calculating the working efficiency of the rotating wheel 3 according to the air supply temperature, the air temperature after heat exchange and the return air temperature. After measuring the temperature parameter through the sensor promptly, can directly be calculated runner 3's work efficiency by controller 7, and do not need the manual work to calculate, can improve degree of automation, alleviate operating personnel's working strength.

the heat recovery unit further comprises a variable frequency motor 10 used for driving the rotating wheel 3, the variable frequency motor 10 is electrically connected with a controller 7, the controller 7 is used for controlling the rotating speed of the variable frequency motor 10 according to the working efficiency of the rotating wheel 3, when the working efficiency (heat recovery efficiency) of the rotating wheel 3 does not reach the degree that the rotating wheel 3 needs to be cleaned, the rotating speed of the variable frequency motor 10 can be controlled according to the working efficiency of the rotating wheel 3, for example, the rotating speed of the variable frequency motor 10 comprises three stages of 300r/h, 500r/h and 800r/h, when η is larger than or equal to 70%, the rotating speed of the variable frequency motor 10 is controlled to be 300r/h, when η is larger than or equal to 50% and smaller than 60%, the rotating speed of the variable frequency motor 10 is controlled to be 500r/h, when η is larger than or equal to 40% and smaller than 50%, the rotating speed of the variable frequency motor 10 is considered to be dirty and blocked, when η is smaller than 40%, the rotating wheel 3 is considered to be stopped, in the rotating speed of the variable frequency motor 10 is adjusted to be in different states, the rotating speed of the rotating wheel 3 can be adjusted, the energy consumption of the rotating wheel can be changed according to the energy consumption of the rotating wheel 3 and the energy of the rotating wheel 3 can be saved.

The heat recovery unit further comprises a display 8, the display 8 is electrically connected with the controller 7, and the display 8 is used for displaying the working efficiency of the rotating wheel 3 in real time. Show runner 3's work efficiency through display 8, can be more convenient know runner 3's working condition, and then make things convenient for operating personnel in time to know and carry out corresponding operation. The controller 7 may also send the data detected by the first sensor 4, the second sensor 5, and the third sensor 6, and the data such as the operating efficiency of the runner 3 to the server 11 of the heat recovery unit, and the data is stored by the server 11 for subsequent data analysis and other operations.

In some embodiments of the present invention, the second bellows 2 is further provided with a water outlet 22 that can be opened and closed, the water outlet 22 is disposed above the runner 3, and the water outlet 22 is used for spraying cleaning liquid to the runner 3 when opened. The water outlet 22 may be provided with an electromagnetic valve 12, and when the operating efficiency of the runner 3 calculated by the controller 7 is lower than a set threshold (for example, 60%), the electromagnetic valve 12 may be automatically controlled to open, and the opening time of the electromagnetic valve 12 may be controlled according to the actual reflected efficiency value, so as to spray the cleaning liquid from the water outlet 22 to clean the runner 3. The cleaning liquid may be added with a medicament suitable for cleaning the rotor 3. The water outlet 22 is opened at a proper time without automatic control by the staff, so that the influence on the indoor effect caused by the moisture added to the fresh air during cleaning can be avoided. The water outlet 22 is arranged to clean the rotating wheel 3, so that the trouble that the rotating wheel 3 needs to be disassembled and assembled during cleaning can be solved, and the cleaning efficiency of the rotating wheel 3 is improved.

The heat recovery unit further comprises a water receiving tray 9, the water receiving tray 9 is arranged in the first air box 1 and located below the rotating wheel 3, and the water receiving tray 9 is used for recovering the cleaning liquid. When the rotating wheel 3 is cleaned by the cleaning liquid sprayed out of the water outlet 22, dirty water after cleaning can be recovered through the water receiving disc 9, and the cleaning liquid is prevented from entering other places of the heat recovery unit to influence the operation of the unit.

It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A heat recovery unit, comprising:

2. A heat recovery unit according to claim 1, further comprising:

3. A heat recovery unit according to claim 2, further comprising:

4. A heat recovery unit according to claim 2, further comprising:

5. A heat recovery unit according to any one of claims 1 to 4,

the second air box is provided with a water outlet which can be opened and closed, the water outlet is arranged above the rotating wheel, and the water outlet is used for spraying cleaning liquid to the rotating wheel when opened.

6. A heat recovery unit according to claim 5, further comprising:

7. A heat recovery unit according to any one of claims 1 to 4,

an air supply outlet and an air outlet are arranged on the first air box, and the air supply outlet and the air outlet are respectively positioned on two sides of the rotating wheel;

an air return opening is formed in the second air box;