CN204438509U - Building exterior-protected Site Detection heating indoor device - Google Patents

Abstract

The indoor heating device provided by the utility model for on-site detection of the heat transfer coefficient of the building enclosure structure includes a body, the body is a hollow body, and a plurality of uniformly arranged heat dissipation holes are opened on the top surface and the left and right sides, and the front end surface is equipped with At least one axial flow fan has an electric heating element equipped with an electric heating controller installed in its cavity. The indoor heating device can automatically adjust the temperature of the indoor space according to the set temperature and maintain it at a certain temperature; through the axial flow fan, the air flow in the indoor space will be strengthened, and the heat dissipation holes will make the hot air disperse well and the temperature of the indoor space is relatively uniform. Reduce temperature gradients. Because of the forced axial flow fan, it has the ability of forced heat exchange, which makes the outer surface temperature of the box lower, reduces the infrared radiation ability of the box, and reduces the influence of infrared radiation on the heat flow meter measuring head during heating.

Description

Indoor heating device for on-site detection of heat transfer coefficient of building envelope

technical field

The utility model belongs to the technical field of measurement and control, and designs an automatic control heating device in a building energy-saving on-site detection room.

Background technique

The heat transfer coefficient of the building envelope is an important indicator for judging the building's energy efficiency, and it needs to be tested on-site after the building is completed. On-site detection of heat transfer coefficient, the most common method is the heat flow meter method.

On-site detection of heat transfer coefficient by the heat flow meter method requires a certain temperature difference between the indoor and outdoor of the building, and requires a stable temperature. However, for the newly completed project, even if there is heating in winter, when the outdoor temperature is not very low, the temperature difference is not easy to meet the detection requirements, especially in summer. Generally, the method of increasing the indoor temperature is often used to meet the detection requirements.

At present, the commonly used heating method is to increase the indoor temperature with commercially available household heating appliances such as electric heaters, electric stoves, and small suns. The disadvantages of this heating method are, first, the temperature cannot be controlled, so the indoor temperature will change with the ambient temperature, which cannot meet the conditions of temperature stability; second, the heating is relatively concentrated, and there will be a large temperature in the heating range Gradient; third, the surface temperature of the heating appliance is high, and there will be strong infrared radiation. The reaction of the heat flow meter head to the influence of infrared radiation is very sensitive, which will cause large errors in the detection results.

Utility model content

The purpose of this utility model is to provide an indoor heating device for on-site detection of the heat transfer coefficient of the enclosure structure, so that the indoor temperature can be controlled and uniform, and the influence of infrared radiation on the measuring head of the heat flow meter can be reduced to a certain extent, so as to solve the problem of The deficiency that existing technology exists.

The purpose of this utility model can be achieved through the following technical solutions:

The indoor heating device for on-site detection of the heat transfer coefficient of the building envelope structure includes a main body. At least one axial flow fan is installed on the surface, and an electric heating element equipped with an electric heating controller is installed in the cavity.

The body is a rectangular box.

The electric heating controller is a temperature regulator.

The electric heating element is an electric heating wire or an electric heating plate or an electric furnace or an electric heater.

There are two axial flow fans, which are evenly installed on the front end of the body.

The axial flow fan is installed on the lower edge of the front face of the body.

The electric heating element is an electric heating wire, and one electric heating wire is arranged in each of the heat dissipation holes; and the electric heating wire is installed in the heat dissipation hole through an asbestos ferrule.

The electric heating element is a plurality of electric heating wires installed along the left and right sides perpendicular to the body.

The advantages of this utility model are: 1) This utility model has a temperature control device, which can automatically adjust the temperature of the indoor space according to the set temperature and maintain it at a certain temperature;

2) The utility model is equipped with an axial flow fan, which will strengthen the air flow in the indoor space, and the heat dissipation holes are provided to make the hot air disperse well. The combination of the two makes the temperature of the indoor space relatively uniform and reduces the temperature gradient.

3) Due to the forced axial flow fan, it has the ability of forced heat exchange, which makes the outer surface temperature of the box lower, reduces the infrared radiation ability of the box, and reduces the influence of infrared radiation on the heat flow meter measuring head during heating.

The utility model is described in detail below in conjunction with accompanying drawing and embodiment.

Description of drawings

Figure 1 is a schematic diagram of the indoor heating device for on-site detection of the heat transfer coefficient of the building envelope.

Figure 2 is a schematic diagram of the installation of the electric heating element.

Explanation of reference signs: 1. Body; 2. Axial flow fan; 3. Cooling hole; 4. Electric heating element; 5. Electric heating controller.

Detailed ways

Example:

As shown in Figures 1 and 2, in order to make the indoor temperature controllable and uniform, and to reduce the influence of infrared radiation on the heat flow meter head to a certain extent, this embodiment provides a building envelope structure heat transfer coefficient On-site detection of indoor heating device, including body 1, body 1 is a hollow body such as rectangular box structure or spherical, etc., this embodiment chooses rectangular box as the basic structure of body 1, which can be clearly seen from Figure 1, its top surface and left and right sides There are a plurality of uniformly arranged heat dissipation holes 3 on the sides, and at least one axial flow fan 2 is installed on the front face (this embodiment shows two uniformly installed on the front face of the body 1—the face facing the viewer) It can also be installed on the lower edge of the front face, so that the air in the body 1 is blown upward from the bottom of the chamber), and an electric heating element 4 equipped with an electric heating controller 5 is installed in the cavity, as shown in the figure As shown in 2, the heating element 4 is installed along the left and right sides of the main body 1. There can be multiple electric heating wires to improve the heating effect. Of course, electric heating plates, electric furnaces or electric heaters can be selected as electric heaters according to the construction site. Heating element.

In order to obtain better heating and uniform heat dissipation effect, the electric heating wire can be selected as the electric heating element, and each heat dissipation hole 3 is provided with one such electric heating wire; and the electric heating wire is installed through an asbestos ferrule (to prevent high temperature scalding the body 1) in the cooling hole 3.

The electric heating controller 5 adopts a commonly used temperature regulator. The commonly used temperature regulator has two-position control and PID regulation control. It is recommended to use PID regulation control to make the temperature control more accurate.

When in use, the device is powered on, the electric heating element 4 is energized, and heating starts. At the same time, the axial flow fan 2 works, and the cold air in the indoor space enters the interior of the box 1 through the axial flow fan 2 and is converted into hot air. Under the action, it is discharged from the cooling holes 3 at a certain speed, and exchanges heat with the cold air in the indoor space.

In this process, the indoor air is heated by forced convection, and the temperature gradually rises. The temperature regulator (electric heating controller 5) controls the heating element 4 on and off according to the indoor set temperature (two-position control) or controls the heating power of the heating element 4 (PID control) to keep the indoor space temperature at A certain temperature range to meet the detection requirements.

During the working process of the utility model, the axial flow fan 2 works continuously to strengthen the flow of indoor air, and the arrangement of heat dissipation holes in three different directions makes the indoor air temperature relatively uniform and the temperature gradient smaller. The end of the outer box close to the measuring head of the heat flow meter is not provided with cooling holes, which reduces the disturbance of the air flow to the measuring head of the heat flow meter and reduces the error of detection.

Claims (8)

1. building exterior-protected Site Detection heating indoor device, comprise body (1), it is characterized in that: described body (1) is a ducted body, its end face and left and right side all offer multiple evenly distributed louvre (3), its front end face is provided with at least one axial flow blower (2), is provided with the electrical heating elements (4) being equipped with electrical heating controller (5) in its cavity.

2. building exterior-protected Site Detection heating indoor device as claimed in claim 1, is characterized in that: described body (1) is rectangular box.

3. building exterior-protected Site Detection heating indoor device as claimed in claim 1, is characterized in that: described electrical heating controller (5) is humidostat.

4. building exterior-protected Site Detection heating indoor device as claimed in claim 1, is characterized in that: described electrical heating elements (4) is heating wire or electric hot tray or electric furnace or electric heater.

5. building exterior-protected Site Detection heating indoor device as claimed in claim 1, is characterized in that: described axial flow blower (2) is two, is evenly arranged on the front end face of described body (1).

6. building exterior-protected Site Detection heating indoor device as claimed in claim 5, is characterized in that: described axial flow blower (2) is arranged on the lower edge of the front end face of described body (1).

7. building exterior-protected Site Detection heating indoor device as claimed in claim 1, is characterized in that: described electrical heating elements (4) is heating wire, arranges this heating wire in louvre described in each (3); And this heating wire is arranged in described louvre (3) by asbestos lasso.

8. building exterior-protected Site Detection heating indoor device as claimed in claim 1, is characterized in that: described electrical heating elements (4) heating wire that to be multiple edge install perpendicular to the left and right side of described body (1).