JPH05118931A - Heat distribution device - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an apportioning device that calculates total heat from measured values related to air and apportions the heat consumption of air conditioners. [Composition] A return air temperature sensor (8), a humidity sensor (9), a supply air temperature sensor (10) and a supply air velocity sensor (11) are provided.
The supply unit relative humidity is set in the control unit (17).
The control unit further calculates the total heat from the enthalpy difference calculated from the temperature and humidity of the return air and the supply air and the supply air volume.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat quantity apportioning device for calculating and controlling heat consumption of an air conditioner.

[0002]

2. Description of the Related Art As a conventional heat quantity apportioning device, one shown in FIG. 2 is known. In this conventional technique, a return air temperature sensor 22 that measures the temperature of the return air flowing back to the air conditioner 21 is installed at the air conditioner inlet,
Further, a wind speed sensor 24 is installed at a position where the air flow passes through the heat exchanger coil 23 and has a substantially uniform wind speed, and a supply air temperature sensor 26 for measuring the blown air temperature is installed near the blowout port of the blower 25. There is. Then, the measured value signals of the return air temperature sensor 22, the wind speed sensor 24, and the supply air temperature sensor 26 are input to a controller 27 having a built-in CPU, the heat consumption of the air conditioner 21 is calculated, and an appropriate heat consumption is calculated. Its operating conditions were controlled so that it could be obtained.

By the way, as for the heat consumption calculated by the heat quantity apportioning device having the above-mentioned configuration, only the sensible heat needs to be calculated during the heating operation, so that the total heat consumption can be obtained.
Since the amount of latent heat taken during dew condensation cannot be measured during the cooling operation, the value calculated as the total amount of heat consumed included a large error.

As another conventional technique capable of calculating the total heat consumption during heating and cooling, a water temperature sensor is provided at each inlet / outlet of the water pipe connected to the heat exchanger coil, and the total temperature is calculated from the temperature difference and the flow rate. It is also possible to provide a calorimeter for determining the amount of heat consumed. However, this calorimeter is not cheap at all, and the site construction cost of the water piping system is large in the installation work.

The present invention has been devised in view of the above-mentioned conventional technical problems to effectively solve them.
Therefore, an object of the present invention is to provide a heat quantity apportioning device that can calculate the total heat consumption including latent heat from the measured value of the air flow system without performing measurement from the water piping system.

[0006]

The heat quantity apportioning device according to the present invention has the following constitution in order to solve the problems of the prior art as described above and to achieve the object thereof. That is, the return air temperature sensor, the return air humidity sensor, the supply air temperature sensor, the supply air velocity sensor, the predetermined supply air relative humidity is set, from the supply air relative humidity and the measurement value of each sensor. A control unit is provided which calculates a difference between the return air enthalpy and the supply air enthalpy, and calculates the total amount of heat from the difference in enthalpy and the supply air amount obtained from the supply air velocity sensor.

[0007]

In the heat quantity apportioning device according to the present invention, the heat consumption is calculated based on the difference between the return air enthalpy obtained from the return air temperature and humidity and the supply air enthalpy obtained from the air supply temperature and humidity. Even in the system that measures the state value of, the total heat consumption including latent heat can be calculated, and the calorie proportional control can be performed not only during the heating operation but also during the cooling operation based on the calculated calculated heat consumption.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A heat quantity apportioning device according to an embodiment of the present invention will be described below with reference to FIG. A filter 2, a blower 3, a cold / hot water coil 4, and a humidifier 5 are sequentially arranged in the air flow path in the air conditioner 1 from the return air side. Reference numeral 6 is a return air duct, and 7 is an air supply duct. Return air duct 6 to air conditioner 1
The return air temperature sensor 8 and the humidity sensor 9
Is attached. A supply air temperature sensor 10 is attached to the air outlet from the air conditioner 1 to the supply air duct 7. A wind speed sensor 11 is installed between the blower 3 and the cold / hot water coil 4. In addition, this wind speed sensor
The hot and cold water coil 4 is for measuring the supply air velocity.
It may be provided on the outlet side of, or at the inlet of the air supply duct 7. In the figure, 12 is a filter differential pressure switch, 13 is a blower inverter, 14 is a motor-operated valve for controlling the flow rate of cold / hot water, and 15 is a leak detector. In the air-conditioned room,
The indoor controller 16 is installed and connected to the control unit 17 in the air conditioner 1. Control unit 17
Is the motor-operated valve 14 so that the temperature of the blown air becomes a set value.
Of the blower 3 is controlled so that the indoor temperature becomes a set value and the inverter 13 is controlled so that the return air humidity becomes a target value. An alarm is issued for clogging or water leakage.
In addition, transmission control is also possible in which various kinds of information can be exchanged with the central control panel and other small monitoring devices. Of course, the start / stop control of the air conditioner 1 is also performed, and the start / stop operation can be performed from the central control panel or the indoor controller 16, but the operation of the indoor controller 16 is prioritized with respect to the central control panel.

The apportioning device is composed of a return air temperature sensor 8, a humidity sensor 9, an air supply temperature sensor 10, a wind speed sensor 11 and a control unit 17, and the relative humidity of the blown air is 93% when calculating the total heat quantity. Is calculated as. This relative humidity is set based on the test data of the relative humidity of the coil outlet air obtained when the dehumidifying cooling is performed. From the enthalpy difference between the return air and the supply air obtained from the measurement data from the temperature / humidity sensors 8, 9 and 10 and the set relative humidity, and the air volume obtained from the measurement data from the wind speed sensor 11, the total calorific value is calculated. Is calculated. Further, the amount of sensible heat can be calculated from the return air temperature sensor 8 and the supply air temperature sensor 10, and the larger of both calculation results is integrated as the consumed heat amount.

With the above-mentioned configuration, the required measurement value for calculating the total heat can be obtained without constructing the water piping system and without newly providing a special sensor or measuring device. Therefore, the total calorific value apportioning device can be realized at low cost.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of an air conditioner including a heat quantity apportioning device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a schematic configuration of an air conditioner provided with a heat quantity apportioning device in a conventional technique.

[Explanation of symbols]

 1 Air Conditioner 3 Blower 4 Cold / Hot Water Coil 8 Return Air Temperature Sensor 9 Return Air Humidity Sensor 10 Supply Air Temperature Sensor 11 Supply Air Speed Sensor 17 Control Unit

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hirokatsu Uraya 1-4-5 Minamimorimachi, Kita-ku, Osaka-shi, Osaka Within Shinko Industrial Co., Ltd. (72) Inventor Hirohiro Ishida 1-5, Kaigan, Minato-ku, Tokyo No. 20 Tokyo Gas Co., Ltd. (72) Inventor Shigeo Sekimoto 1-5-20 Kaigan, Minato-ku, Tokyo Tokyo Gas Co., Ltd.

Claims (1)

[Claims] 1. A return air temperature sensor (8) and a return air humidity sensor
(9), supply air temperature sensor (10), supply air velocity sensor (11)
And a predetermined supply air relative humidity is set to calculate the difference between the return air enthalpy and the supply air enthalpy from the measured values of the supply air relative humidity and the sensors (8, 9, 10, 11), A heat quantity apportioning device comprising: a control means (17) for calculating a total heat quantity from an enthalpy difference and a supply air quantity obtained from the supply air speed sensor (11).