JPH0332692B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a hot water hot air heater incorporating an automatic capacity adjustment device.

BACKGROUND TECHNOLOGY This type of conventional hot water type hot air heater consists of an air filter, a blower, a heat exchanger, a frame, etc., and its temperature is controlled by controlling the blower with a room temperature control device operated by a signal from a room temperature sensor. Capacity was adjusted by air volume and measured by room temperature control.

Problems to be Solved by the Invention In such a conventional configuration, the capacity is adjusted only by notch switching of the blower or stepless control, so if the minimum rotation speed of the blower is guaranteed, the air volume will be approximately 50% of the rated capacity, and the capacity will be reduced by approximately 50% of the rated air volume. It can only be adjusted up to about 70%. Therefore, when the heating load is extremely small, the blower must be controlled on and off, which often impairs comfort, such as large room temperature fluctuations. In addition, since the capacity is adjusted only by air volume, if the capacity is reduced, the capacity of the heat exchanger will be left over, and the blowing temperature will rise relatively, which not only causes discomfort, but also reduces the temperature of the hot air blown out. Since there is a large temperature difference from the room temperature, upward airflow due to buoyancy increases, resulting in a large temperature difference between the upper and lower parts of the room, resulting in problems such as loss of comfort.

The present invention solves these problems,
The purpose is to keep the blowing temperature substantially constant, expand the capacity adjustment range, and improve comfort.

Means for Solving the Problem In order to solve this problem, the present invention provides an electric valve using a stepping motor between the heat exchanger and its piping connection adapter, and uses a room temperature sensor to adjust the opening degree of the valve in stages. At the same time, the notch of the motor is also controlled in stages so that the air volume is commensurate with the flow rate of hot water according to the opening degree of the valve, so that the temperature of the hot air blown out remains approximately constant. .

Effect This configuration expands the range of capacity adjustment, making it easier to match the heating load, reducing the frequency of turning the fan on and off, and since the blowing temperature is almost constant, the difference in temperature between the top and bottom inside the room hardly changes. , comfort is significantly improved, such as by obtaining a good temperature distribution.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the drawings.

In FIG. 1, reference numeral 1 denotes a frame body, and within this frame body 1, a blower 2, a heat exchanger 3, a room temperature control section 4, an electric ball valve 5, an electric motor 6, etc. are attached.
The electric ball valve 5 is installed between the heat exchanger 3 and the piping connection port 7, and is connected to the signal from the room temperature sensor 8 placed on the blowing side of the blower 2 and the temperature artificially set from the operating section. Compare the room temperature control section 4
is controlled together with the electric motor 6 (see FIG. 2).
Since the electric ball valve 5 consists of a valve body 5a and a stepping motor 5b, the room temperature control section 4
The valve opening degree, that is, the flow rate of hot water, can be controlled in stages by signals from the valve. In addition, since the rotation speed of the electric motor 6 is controlled at the same time, i.e., the air volume is controlled, the capacity adjustment range is adjusted by changing stepwise to the rotation speed corresponding to the opening degree of the valve, which is determined in advance so that the temperature of the hot air blown out is constant. compared to 100% to 70% of the conventional example.
It can be expanded by about 100 to 50%. As a result, the capacity adjustment range is widened and the blowing temperature does not become too high, so there is no discomfort when directly exposed to hot air, the difference in temperature between the top and bottom of the room does not become large, and the temperature distribution is improved. Furthermore, it becomes easier to match the heating load, and comfort can be significantly improved, such as by reducing the frequency of turning on and off the blower.

Effects of the Invention As described above, according to the present invention, even if the capacity is adjusted to adjust the room temperature, the temperature of the hot air blown out is always approximately constant, and the difference between the room temperature and the temperature of the hot air blown out is gradual, improving comfort. At the same time, there is no discomfort, and when the temperature difference is large, the difference between the upper and lower parts of the room becomes large, but this temperature difference is also reduced.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a sectional view, and FIG. 2 is a graph showing the control state of air volume and flow rate with respect to the difference between room temperature and set temperature. DESCRIPTION OF SYMBOLS 1... Frame body, 2... Air blower, 3... Heat exchanger, 4... Room temperature control part, 5... Electric ball valve, 5a... Valve body, 5b... Stepping motor, 6... Electric motor, 7... Piping connection port, 8... Room temperature sensor.

Claims (1)

[Claims] 1. An electric valve using a stepping motor is installed between the heat exchanger and its piping connection adapter, and the opening degree of the valve is controlled in stages by a room temperature sensor, and the air volume is adjusted according to the flow rate of hot water according to the opening degree of the valve. This hot air heater is configured to control the notch of the motor step by step so that the temperature of the hot air blown out remains approximately constant.