JPH0474639B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a heat exchange device used in an air conditioning ventilation fan or the like that effectively exchanges enthalpy between a primary airflow and a secondary airflow.

Conventional configurations and their problems Conventional enthalpy exchange between primary airflow and secondary airflow is performed using a sensible heat exchanger that exchanges only sensible heat (temperature) and a total heat exchanger that exchanges sensible heat and latent heat (humidity) at the same time. There is a vessel. Among these, the total heat exchange method uses a rotating body to store heat, release heat, or store moisture.
There are two methods: a heat storage rotary type that exchanges all heat by repeating moisture release, and a stationary transmission type that exchanges sensible heat and latent heat through a partition plate.

In the case of the heat storage rotary type, there is a drawback that the heat storage capacity is small, and the effective amount of moisture adsorption to the element is reduced due to the effects of sensible heat storage and heat of adsorption and desorption of moisture. Furthermore, the stationary transmission type has the disadvantage that the total heat exchange efficiency is generally low because temperature and humidity exchange is conducted and diffused through partition walls (partition plates).

Furthermore, when considering air conditioning ventilation fans, total heat exchange is advantageous during cooling in the summer when both the temperature and humidity inside the room are lower than those outside the room. On the other hand, when the humidity is higher indoors, sensible heat exchange becomes advantageous.

As mentioned above, in order to provide effective air conditioning and ventilation throughout the year, it is desirable to be able to separate sensible heat exchange and total heat exchange. However, both of the above two methods
It has a single function of total heat exchange, and has the disadvantage that effective air conditioning and ventilation cannot be performed.

Purpose of the Invention The present invention aims to improve the above-mentioned drawbacks, and is a new system with heat storage transmission rotation that has higher efficiency than conventional heat exchangers and has a combined function of separately performing sensible heat exchange and total heat exchange. A heat exchange device is provided.

Structure of the Invention The present invention provides first and second
elements are stacked alternately in the circumferential direction to form a thick-walled cylindrical heat exchanger, the partition wall between the first and second elements is made non-permeable, and the first and second elements are made non-permeable. At least a part of the material constituting the element is hygroscopic, and the first element has an opening on an inner circumference on one end side of the cylindrical heat exchanger and an outer circumference on the other end side. The second element is configured to allow airflow to pass through the axial passage from the inner periphery of the other end to the outer periphery of the other end and vice versa. an opening that allows air to pass from the inner circumferential opening on the other end side through the axial passage to the outer circumferential opening on the one end side and vice versa, and air in the first element and the second element The passage between the first element and the second element is configured so that different primary airflow and secondary airflow flow through the flow path in countercurrent directions through a partition wall, and the passage between the first element and the second element is formed by rotating the cylindrical heat exchanger. The structure is such that the passing primary airflow and secondary airflow are periodically replaced. Therefore, when the cylindrical heat exchanger is rotated, the primary airflow and the secondary airflow periodically flow into both the first element and the second element, so total heat exchange can be performed. When the rotation of the container is stopped, sensible heat exchange can be performed between the adjacent first element and second element. Heat exchange involves not only heat storage and moisture storage in the element, but also heat transmission through the partition plate. In other words, it is a combination of a heat storage rotation type and a stationary transmission type, and higher heat exchange efficiency can be obtained than before. In the conventional heat storage rotary type, the amount of heat flowing into the heat storage plate is limited by its heat capacity, but the partition plate that becomes the heat storage body of the present invention
Since the heat is transmitted to the other surface, the generated adsorption heat and inflow heat can be processed outside of the rotation of the element, which increases the inflow heat of the element and increases the effective amount of water adsorption into the element. It's for a reason.

Furthermore, since the partition wall is a non-permeable moisture barrier, moisture transfer is only carried out by accumulating moisture in the element. Therefore, when the rotation of the heat exchanger is stopped, humidity is no longer exchanged, and the heat exchanger becomes a sensible heat exchanger that only exchanges temperature. As a result, effective air conditioning ventilation can be achieved by combining total heat exchange and sensible heat exchange.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described based on the drawings. FIG. 1 shows a cylindrical heat exchanger in an embodiment of the present invention. In the figure, 1 is a first element and 2 is a second element, which are alternately stacked to form a cylindrical heat exchanger. FIG. 2 is a diagram showing the first and second elements, and the elements include a moisture-impermeable partition wall (partition plate) 3, an end face in the axial direction of the cylinder, an inner peripheral part, and an outer peripheral part, and the primary air flow. an end spacer plate 4 for preventing mixing of secondary airflow;
It is composed of a spacer plate 5 that allows the primary airflow and secondary airflow to flow throughout the passage within the element.
These materials are vinyl chloride plates coated with colloidal silica as a moisture absorbing material and dried.

FIG. 3 is a diagram showing the inflow and outflow paths of airflow within the heat exchanger 6. In the figure, the heat exchanger is completely partitioned into upper and lower parts. At the top of the heat exchanger,
The primary airflow A enters from the inner periphery of one end of the cylinder and exits from the outer periphery of the other end. On the other hand, similarly to the secondary air flow B, it enters from the inner circumferential portion on the other end side and exits from the outer circumferential portion on the one end side. Further, in the lower part of the heat exchanger in the figure, the primary air flow A enters from the outer circumferential portion on one end side and exits from the inner circumferential portion on the other end side. Similarly, the secondary airflow B enters from the outer periphery of the other end and exits from the inner periphery of the one end. That is, if the first element through which the primary airflow A flows in the upper part of the heat exchanger 6 moves to the lower part of the heat exchanger 6, the secondary airflow B flows through the first element and the first element moves from the top to the bottom, allowing for total heat exchange. In addition,
If the flow path of the first element is the flow of the primary airflow A in the upper part, the flow path of the first element that has moved to the lower part is the flow of the secondary airflow B, and the flow direction is reversed between the upper and lower parts. be. FIG. 4 shows a part of the heat exchanger, and shows the flow of air in each element in the upper part of the heat exchanger of FIG. The primary airflow A enters from the inner circumference of the first element 1 and exits from the outer circumference. Also, secondary airflow B
It also enters from the inner periphery of the second element 2 and exits from the outer periphery. As the heat exchanger is rotating, the portion of the heat exchanger shown in FIG. 4 is transferred to the lower portion shown in FIG. This time, the primary airflow A flows through the second element in the opposite direction to the flow of the secondary airflow B,
In other words, it enters from the outer circumference and exits from the inner circumference. Similarly, the secondary airflow B flows through the primary airflow A through the first element.
Flows in the opposite direction to the direction of flow. By rotating the element in this way, the airflow flowing through the first emerent and the second emerent can be exchanged. The above is an example of the flow of air flowing inside the heat exchanger according to the present invention.

This type of system enables heat exchange with higher efficiency than the conventional stationary transmission type or heat storage rotating type. I will discuss it below. The heat exchange between the primary airflow A and the secondary airflow B is
This is carried out through partition walls (partition plates) 3 between the elements, but since the partition walls are made of moisture-impermeable material, only sensible heat exchange takes place. However, as mentioned above, the heat exchanger rotates, and in the first element, the primary airflow and the secondary airflow are alternated repeatedly, so that total heat exchange can be performed as in the heat storage rotary type. Ru. That is, since the moisture-impermeable partition wall (partition plate) 3 and the spacer plate 5 shown in FIG. 2 are coated with a moisture absorbent and silica, it becomes a total heat exchanger that exchanges temperature and moisture. Note that the material of the spacer plate 5 may be any material such as moisture-permeable paper or moisture-impermeable metal.

As mentioned above, the advantage of the heat exchanger of the present invention is that the heat exchange is a combination of the stationary transmission type and the heat storage rotation type, and high efficiency can be obtained. This allows not only sensible heat, but also adsorption heat and desorption heat associated with adsorption and desorption of moisture to the element, to be transferred through the partition wall (partition plate) 3 and not only due to heat storage due to the rotation of the heat exchanger. This is because the element can effectively absorb a large amount of water.

Furthermore, when the rotation of the heat exchanger is stopped,
The heat exchange mechanism consists only of passage (conduction) through the partition wall (partition plate) 3, and sensible heat exchange can be performed.

Effects of the Invention As described above, in the heat exchange device of the present invention, the total heat exchange efficiency can be made higher than before due to the effects of both transmission (conduction) from the partition walls and heat storage and moisture storage due to rotation. Further, by stopping the rotation of the heat exchanger, the total heat exchange can be changed to sensible heat exchange. In other words, it is possible to use total heat exchange and sensible heat exchange depending on the environmental conditions, and has the feature of more effective heat exchange.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a heat exchanger of an embodiment for realizing the heat exchange device of the present invention, FIG. 2 is a perspective view of first and second elements constituting the heat exchange, and FIG. 3 4 is an explanatory diagram of the airflow passing through the heat exchanger, and FIG. 4 is a partial schematic explanatory diagram of the heat exchanger showing the airflow of FIG. 3. 1... First element, 2... Second element, 3... Partition wall (partition plate), 4... End face partition plate,
5... Spacing plate, 6... Heat exchanger.

Claims (1)

[Claims] 1 A thick cylindrical heat exchanger is formed by alternately stacking first and second elements that form an air flow path in the circumferential direction, and the partition wall between the first and second elements is made non-moisture permeable. and the first and second
At least a part of the material constituting the element is hygroscopic, and the first element has an opening at an inner periphery at one end of the cylindrical heat exchanger and an outer periphery at the other end. The second element allows air to pass through the opening through the axial passage to the opening on the outer periphery of the other end and vice versa, and the second element has an inner periphery on the other end and an outer periphery on the one end. has an opening at the other end, and allows airflow to pass through the inner opening at the other end through the axial passage to the outer opening at the one end, and vice versa; In addition, by rotating the cylindrical heat exchanger, the first element and the second A heat exchange device configured to periodically replace the primary airflow and secondary airflow that pass through the element passage.