JPH09166347A - Fan coil unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the need of set temperature alteration operation upon alteration of an operation mode by providing both of a heating temperature set part and a cooling temperature set part in a rooms temperature set means. SOLUTION: A temperature control 3 includes an operation switch 7 for switching operation/interruption, and two temperature setting thumbscrews 8, 9. The one is a heating temperature set thumbscrew (heating temperature set part) 8 and the other is a cooling temperature set thumbscrew (cooling temperature set part) 9, both constituting a room temperature set means 10 device. An operation mode judgement part 11 of a control part 4 judges that heating operation is performed provided the detected temperature is above a reference temperature. In contrast, provided the detected temperature is lower than the reference temperature, it judges that cooling operation is performed. On the basis of the judgement result, a set temperature selection part 12 reads set temperature corresponding to the operation mode from the set value of both temperature set thumbscrews 8, 9, and outputs it to a fan control part 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fan coil unit installed indoors when performing centralized heating and cooling.

[0002]

2. Description of the Related Art When performing centralized heating and cooling in a building,
A method of installing a fan coil unit having a heat exchanger and a fan inside each room and supplying hot water or cold water from the outdoor unit side to the fan coil unit is generally adopted. This fan coil unit, as shown in FIG.
A fan coil main body 31 having a heat exchanger and a fan (not shown) built therein and an operation control device 32 are provided. The operation control device 32 includes a temperature controller 33, a control unit 34 built in the main body, and a room temperature sensor 35. And so on. The temperature controller 33 is provided with an operation switch 36 and a temperature setting knob 37.

In the fan coil unit, the amount of air blown by the fan is controlled according to the temperature difference between the temperature set by the temperature setting knob 37 and the detected room temperature, that is, the air amount is increased when the temperature difference is large, When the temperature difference is small, control is performed to reduce the air volume (see Japanese Utility Model Publication No. 2-39155).

[0004]

By the way, in the above-mentioned conventional fan coil unit, the temperature setting knob 37 is used.
Since it is shared by both heating and cooling, it is necessary to readjust the set temperature each time when switching the cooling / heating operation mode. It is the comfortable temperature in the heating season,
This is because the comfortable temperatures in the cooling season do not always match, but rather differ from each other.

The present invention has been made in order to solve the above-mentioned conventional drawbacks, and an object thereof is to eliminate the need to change the set temperature when changing the operation mode, thereby improving the comfort of use. To provide a simple fan coil unit.

[0006]

Therefore, the fan coil unit according to claim 1 is provided with a room temperature setting means 10 for controlling the rotation of the fan so that the detected room temperature approaches the temperature set by the room temperature setting means 10. In the fan coil unit provided with the means 2, the room temperature setting means 10 is characterized by including both the heating temperature setting part 8 and the cooling temperature setting part 9.

Since the fan coil unit is provided with two temperature setting sections 8 and 9 for heating and cooling, it is sufficient to select either one of the set temperatures according to the operation mode. It is not necessary to change the set temperature like this. The selection of the set temperature by changing the mode may be performed by using a manually operable changeover switch, but it is possible to automatically perform the selection operation as in claim 2 and further improve convenience in use. It is also possible.

That is, in the fan coil unit according to the second aspect, the operation control means 10 includes an operation mode determination means 11 for determining whether it is a heating operation or a cooling operation.
It is characterized by including a set temperature selecting means 12 for selecting a set temperature in the heating temperature setting unit 8 during the heating operation and a set temperature in the cooling temperature setting unit 9 during the cooling operation.

According to the fan coil unit, the set temperature is automatically selected according to the operation mode. At this time, the determination of the operation mode may be performed based on the operation mode transmitted from the outdoor unit side or the detected room temperature at the start of the operation, but as in claim 3, the temperature control flowing into the heat exchanger is performed. It is preferable to detect the water temperature by the water temperature sensor 6 from the viewpoint of simplifying the configuration and ensuring operational reliability. The temperature of the temperature-controlled water is indirectly, depending on the pipe temperature, the heat exchanger temperature, etc.
Can be detected. And in this way the detection of operating mode,
In addition, when the fan control is performed only on the indoor side, data exchange with the outdoor side is not required, so that the control configuration can be simplified and the installation flexibility on the indoor side can be further improved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the fan coil unit of the present invention will be described in detail with reference to the drawings.

First, as shown in FIG. 1, the fan coil unit includes a fan coil body 1 having a heat exchanger and a fan (not shown) built therein, and an operation control device (operation control means) 2. The operation control device 2 includes a temperature controller 3, a controller 4 built in the main body, a room temperature sensor 5, a pipe sensor 6, and the like. The temperature controller 3 is provided with an operation switch 7 for switching between operation and stop, and two temperature setting knobs 8 and 9. One is a heating temperature setting knob (heating temperature setting section) 8 and the other is a cooling temperature setting knob (cooling temperature setting section) 9, both of which constitute a room temperature setting means 10.

The pipe sensor 6 is for detecting the temperature of the pipe flowing into the heat exchanger, and functions as a water temperature sensor for indirectly detecting the temperature of the temperature-controlled water. When the detected temperature is equal to or higher than the reference temperature, the operation mode determination unit (operation mode determination unit) 11 of the control unit 4 determines that the heating operation is performed, and the detected temperature is lower than the reference temperature. For example, it is determined that the cooling operation is being performed. Based on the result of this determination, the set temperature selection unit (set temperature selection means) 12 reads the set temperature corresponding to the operation mode from the set values of the temperature setting knobs 8 and 9, and the fan control unit reads the set temperature. It outputs to 13. In the fan control unit 13, the air volume is made large according to the temperature difference between the room temperature detected by the room temperature sensor 5 and the set temperature, that is, when the temperature difference is large, the air volume is made small when the temperature difference is small. To control the fan speed.

The above control procedure is shown in FIG. First, when the operation switch 7 is turned on (step S1), the operation mode is determined based on the temperature detected by the pipe sensor 6 and the like (step S2), and the temperature difference for heating-fan rotation speed characteristic during heating operation. According to the temperature difference-fan rotation speed characteristic for cooling (step S4), the fan operation is controlled in accordance with (step S3). In addition, the temperature difference-fan rotation speed characteristics are respectively determined by the fan control unit 13.
Of the fan, and the operation of the fan is stopped when the room temperature reaches the set temperature.

According to the above fan coil unit,
Since the two temperature setting knobs 8 and 9 for heating and cooling are provided, it is only necessary to select one of the set temperatures according to the operation mode, and thus the conventional set temperature changing operation is required. Therefore, the comfort of use is improved. Moreover, since the operation of changing the set temperature can be automatically performed, the convenience in use can be improved. Further, since the operation mode is determined by the pipe sensor 6, the operation mode can be detected and the fan control can be independently performed on the indoor side, so that data exchange with the outdoor side is not necessary and the control configuration is simplified. In addition, the restrictions on the installation on the indoor side are alleviated, and the degree of freedom of installation can be improved.

In the above-mentioned embodiment, the temperature controller 3 may be provided with a manually operable changeover switch to select the set temperature by changing the operation mode. In addition to the use of the piping sensor 6, the operation mode may be determined by using the detected room temperature at the start of operation or by transmitting the operation mode from the outdoor unit side.

[0016]

According to the fan coil unit of the first aspect, since the two temperature setting sections for heating and for cooling are provided, it is possible to select either one of the set temperatures according to the operation mode. Since it is sufficient, it is not necessary to perform the complicated setting temperature changing operation as in the past, and therefore the comfort in use is improved.

Further, according to the fan coil unit of the second aspect, the operation of changing the set temperature can be automatically performed, so that the convenience in use can be improved.

Further, according to the fan coil unit of the third aspect, since the operation mode can be detected and the fan control can be independently performed on the indoor side, it is not necessary to exchange data with the outdoor side, and the control structure is simplified. In addition, the restrictions on the installation on the indoor side are alleviated, and the degree of freedom of installation can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a fan coil unit of the present invention.

FIG. 2 is a flowchart of a control system for the fan coil unit.

FIG. 3 is a block diagram showing a conventional fan coil unit.

[Explanation of symbols]

 2 Operation control device (operation control means) 5 Room temperature sensor 6 Pipe sensor (water temperature sensor) 8 Temperature setting part for heating 9 Temperature setting part for cooling 10 Room temperature setting means 11 Operation mode determination part (operation mode determination means) 12 Set temperature selection Section (set temperature selection means)

Claims (3)

[Claims] 1. A fan coil unit comprising a room temperature setting means (10) and an operation control means (2) for controlling rotation of a fan so that a detected room temperature approaches a temperature set by the room temperature setting means (10). In the above room temperature setting means (1
The fan coil unit 0) is provided with both a heating temperature setting part (8) and a cooling temperature setting part (9). 2. The operation control means (10) includes an operation mode determination means (11) for determining whether it is a heating operation or a cooling operation, and a set temperature in a heating temperature setting section (8) during a heating operation. The fan coil unit according to claim 1, further comprising: a set temperature selecting unit (12) for selecting a set temperature in the cooling temperature setting unit (9) during a cooling operation. 3. The fan coil unit according to claim 2, wherein the operation mode discrimination means (11) includes a water temperature sensor (6) for detecting the temperature of the temperature-controlled water flowing into the heat exchanger. .