JPH11211187A - Air conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress occurrence of a mixing loss while providing a plurality of air conditioning apparatuses in one room. SOLUTION: This system is equipped with a plurality of local air conditioning apparatuses 14 and 16 having air conditioning equipment 22 and 24 cooling and heating indoor space, temperature sensors 26 and 28 measuring room temperature in areas assigned to the air conditioning equipment 22 and 24, humidity sensors 30 and 32 measuring indoor humidity in the areas assigned to the air conditioning equipment 22 and 24, indoor temperature setting units 34 and 36 setting a target room temperature and control parts 38 and 40 conducting switchover of cooling and heating and operation and stop of the air conditioning equipment 22 and 24 so that the room temperature obtained by the temperature sensors 26 and 28 be made to accord with the temperature set by the indoor temperature setting units 34 and 36, and with a radiant temperature sensor 18 measuring indoor radiant temperature and an overall, control part 20 which calculates an optimum room temperature in the areas assigned to the pertinent local air conditioning apparatuses 14 and 16 on the basis of the indoor radiant temperature, the measured room temperature and the indoor humidity and sets them in the control parts 38 and 40 thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for heating or cooling a room, and includes a plurality of units installed in a room of a room so as to be responsible for air conditioning of a predetermined region of the room. The present invention relates to an air conditioner in which the air conditioners are integrated to operate efficiently and air conditioning in the room is efficiently performed.

[0002]

2. Description of the Related Art Generally, an air conditioner is installed to heat or cool a room. When a single air conditioner is installed in one room, the room temperature is changed by switching the heating or cooling of the air conditioner or switching between operation and stop to match the room temperature to the set temperature. Can be controlled substantially uniformly.

[0003] In recent years, it has been desired to provide a plurality of zones (zones) having different temperatures in one room due to diversification of office environments and the like. For this reason, there is a case where a plurality of independent air conditioners are installed in one room, and respective temperature settings are performed separately. In this case, each air conditioner operates independently, and is operated independently irrespective of the heating or cooling operation mode of the other air conditioners.

[0004]

However, as described above, when a plurality of independent air conditioners are installed in one room and the temperature is separately set, the operation mode of heating or cooling of the other air conditioners is set. , The supply air from the adjacent air conditioner mixes and the efficiency of heating or cooling may be extremely deteriorated.
For example, when the air-conditioning apparatus that performs the heating operation and the air-conditioning apparatus that performs the cooling operation are adjacent to each other, the air in each zone enters the other-side zone, intermingles with each other, and interferes with each other. The air is cooled more than usual and hinders heating, and in the air conditioner on the cooling side, the air in the zone is heated more than usual and hinders cooling. Due to such interference and mixing of air, the efficiency of heating or cooling becomes extremely poor, and there is a possibility that wasteful energy is wasted, that is, mixing loss occurs.

[0005] In particular, when the occupants of each zone individually set the temperature of a plurality of air conditioners in one room, the sensible temperature differs for each occupant. Mixing loss easily occurs.

Accordingly, an object of the present invention is to provide an air conditioner that can suppress the occurrence of mixing loss even when a plurality of air conditioners are provided in one room.

[0007]

As a technical means for achieving the above object, an air conditioner according to the present invention is provided with a plurality of partial air conditioners in one room, and the interior of the room is divided into a plurality of areas. The air conditioner performs air conditioning by the partial air conditioner every time, each partial air conditioner performs an air conditioner that performs heat exchange to perform indoor cooling and heating, and an area in charge of the partial air conditioner. A temperature sensor for measuring the temperature, a humidity sensor for measuring the humidity of the assigned area, a temperature setter for setting a target temperature for the assigned area, and the temperature setter for measuring the room temperature measured by the temperature sensor. A control unit for changing an operation state of the air conditioning equipment so as to match the set temperature set in the air conditioning apparatus, wherein the indoor radiation temperature is measured. Based on the radiant temperature sensor, the radiant temperature obtained by the radiant temperature sensor and the room temperature obtained by the temperature sensor and the room humidity obtained by the humidity sensor of each of the partial air conditioners. The present invention is characterized in that an overall control unit is provided which calculates an optimum indoor temperature in the area in charge of the air conditioner, and sets the optimum indoor temperature in the control unit of the partial air conditioner.

That is, when performing indoor temperature control, target indoor temperatures are set in advance in the indoor temperature setting devices of the respective partial air conditioners. Then, for each of the partial air conditioners, the indoor temperature is measured by the temperature sensor, and the indoor humidity is measured by the humidity sensor.

Further, the radiation temperature in the room is measured by the radiation temperature sensor. Then, based on the radiant temperature obtained by the radiant temperature sensor, the room temperature obtained by the temperature sensor of each partial air conditioner, and the room humidity obtained by the humidity sensor, the integrated control unit Calculate the optimal room temperature in the area in charge. Further, the optimal room temperature is set in the control unit of the partial air conditioner. For this reason, the room temperature in the zone where each of the partial air conditioners is installed is optimized. Therefore, the number of times the indoor resident changes the set temperature is reduced.

[0010] In the air conditioner according to the invention of claim 2 or claim 3, the general control unit operates the air conditioner of each of the partial air conditioners to perform either heating or cooling operation. If the plurality of air conditioning equipment include a heating operation and a cooling operation among the plurality of air conditioning equipment, priority is given to the cooling operation, and the air conditioning equipment performing the heating operation is stopped or changed to the cooling operation. That the integrated control unit detects whether the air conditioning equipment of each of the partial air conditioners is operating either heating or cooling, and performs heating operation among the plurality of air conditioning equipment. When there is a mixture of cooling operation and heating operation, heating operation is prioritized, and the air conditioning equipment for cooling operation is stopped or changed to heating operation.

That is, when performing the indoor temperature control, the integrated control unit detects whether the air conditioning equipment of each partial air conditioner is operating for heating or cooling. Then, when a plurality of air conditioners that perform the heating operation and a plurality of units that perform the cooling operation are mixed, either the air conditioner that performs the heating operation or the air conditioner that performs the cooling operation is stopped. For this reason, among the plurality of air conditioning equipment, the one that performs the heating operation and the one that performs the cooling operation do not coexist, so that mixing loss does not occur.

Further, in the air conditioner according to the invention of claim 4, in the general control unit, an average prediction answer (PMV value) is provided.
Is calculated, and the ambient temperature is set as a set temperature of each partial air conditioner.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below in detail based on an example of a preferred embodiment shown in the drawings. 1 and 2 show an example of an embodiment of an air conditioner 10 of the present invention. The air conditioner 10 includes a plurality of partial air conditioners 14, 16 for heating or cooling the room 12,
A radiation temperature sensor 18 for measuring the radiation temperature of the room 12, and a partial air conditioner 14,
A total control unit 20 is provided for calculating the optimum room temperature in each of the 16 assigned areas and setting the calculated room temperature in the partial air conditioners 14 and 16.

One room in which the air conditioner 10 is installed is divided into two zones, that is, a first zone 12a and a second zone 12b. There is no partition between the zones 12a and 12b, and the air can move freely. And
A first partial air conditioner 14 is installed in the first zone 12a, and a second partial air conditioner 16 is installed in the second zone 12b, so that the respective partial air conditioners 14 and 16 are connected to the respective zones 12a and 12b. The partial air conditioners 14 and 16 respectively control the room temperature of the respective zones 12a and 12b in which they are installed. In this embodiment, one room is divided into two zones 12a and 12b. However, the present invention is not limited to this. The room may be divided into three or more zones and a partial air conditioner may be installed in each zone. . In this case, the temperature control of the room 12 can be performed more finely for each place.

Each of the partial air conditioners 14 and 16 measures the air temperature of the air conditioners 22 and 24 for heating or cooling the room 12 and the indoor temperatures of the zones 12a and 12b which the partial air conditioners 14 and 16 are responsible for. Temperature sensors 26 and 28, and the same zone 12
Humidity sensors 30 and 32 for measuring the indoor humidity of a and 12b, indoor temperature setting units 34 and 36 for setting the target indoor temperature in the zones 12a and 12b, and the indoor temperature obtained by the temperature sensors 26 and 28 Control units 38, 40 for controlling the switching of the operation mode related to the heating or cooling of the air-conditioning equipment 22, 24 and the switching of the operation or the stop in order to make the temperature of the air conditioning equipment 22, 34 match the set temperature set by the indoor temperature setting units 34, 36. And These air conditioning equipment 22, 24 and temperature sensors 26, 28,
The humidity sensors 30 and 32 and the indoor temperature setting units 34 and 36 are connected to control units 38 and 40, respectively.

The air conditioners 22 and 24 allow a so-called refrigerant, such as cold water or hot water, to flow through the heat exchanger, and cool or heat it by heat exchange with outside air or indoor air to perform indoor heating.
12 to supply. The temperature of the supply air can be controlled by changing the opening of a valve for adjusting the flow rate of the refrigerant.

The control units 38 and 40 compare the measured values and the set values with the result of the previous calculation in order to make the measured values by the temperature sensors 26 and 28 coincide with the set values set in the indoor temperature setting units 34 and 36. The feedback control calculation (for example, P
ID calculation) to determine the opening degree of the valves of the air conditioning equipment 22 and 24. Thereby, the room temperature can be made to match the set temperature by changing the temperature of the supply air from the air conditioning equipment 22, 24.

On the other hand, the integrated control unit 20 includes a radiation temperature sensor.
18 and the control units 38, 40 of the respective partial air conditioners 14, 16
And are connected. Then, the radiation temperature obtained by the radiation temperature sensor 18 and the room temperature obtained by each of the temperature sensors 26 and 28 of the partial air conditioners 14 and 16 and the room humidity obtained by each of the humidity sensors 30 and 32 are compared. Based on the assigned zones 12a, 12b of the partial air conditioners 14, 16,
Is calculated, and the optimum room temperature is set in the control units 38 and 40 of the partial air conditioners 14 and 16. The integrated control unit 20 includes, from each of the control units 38 and 40, an operation mode in each of the air conditioners 10, an indoor temperature, an indoor humidity, and an indoor set temperature, and a radiated temperature measured value from the radiated temperature sensor 18. Is entered.

The operation of the general control unit 20 when controlling the room temperature by the above-described air conditioner 10 will be described below with reference to the flowchart shown in FIG.

The general control unit 20 obtains a measured value of the radiation temperature from the radiation temperature sensor 18 every five minutes, for example (step 301).
). Subsequently, the general control unit 20 controls the first partial air conditioner 14
The measured value of the room temperature is obtained from the temperature sensor 26, and the measured value of the room humidity is obtained from the humidity sensor 30 (step 302). Then, the general control unit 20 calculates the water vapor partial pressure from the room temperature and the room humidity obtained in step 302 (step 30).
3).

Here, based on the radiation temperature obtained in step 301, the room temperature obtained in step 302, and the partial pressure of water vapor obtained in step 303, the general control unit 20 sets the PMV to 0 according to equation (1). so as to calculate the ambient temperature T _a of the first partial air conditioner 14 (step 304). This PMV
It is an average predicted answer, that is, a value representing the comfort felt by humans (ISO7730-1984).

[Equation 1] PMV = (0.028 + 0.3033e- ^0.036M ) * {(M−
W) −3.05 * 10 ⁻³ (5733−6.99 (MW) −P _a ) −0.42 [(M
−W) −58.15] −1.7 * 10 ⁻⁵ M (5867−P _a ) −0.0014M (34
−T _a ) −3.96 * 10 ⁻⁸ f _c1 [(T _c1 +273) ⁴ − (T _mrt +27
3) ⁴ ] −f _c1 h _c (T _c1 −T _a )} where

## EQU2 ## T _c1 = 35.7−0.028 (M−W) −l _c1 (3.96 * 10 ⁻⁸⁾
f _c1 [(T _c1 +273) ⁴ − (T _mrt +273) ⁴ ]}

H _c = 2.38 (T _c1 −T _a ) ……… 0.25 <12.1 (V _air ) ^0.5 = 12.1 (V _air ) ^0.5 …….

F _c1 = 1.0 + 1.29 * l _c1 ……… l _c1 <0.078 m ² · ° C./W = 1.05 + 0.645 * l _c1 ··· l _c1 > 0.078 m ² · ° C./W And M: metabolic rate (= 75) W: external work (= 0) l _c1 : thermal resistance of clothing (predetermined for each season) f _c1 : surface area of human body clothing (predetermined value every season) T _a: the ambient temperature T _mrt: mean radiation temperature (measured value by the radiation temperature sensor) V _air: average wind speed (fixed value) P _a: water vapor partial pressure (calculated value) h _c : Convection heat transfer coefficient (fixed value) T _cl : Surface temperature of clothing (measured value of temperature sensor), which is set according to season for clothing thermal resistance (l _c1 ) and human body clothing surface area (f _c1 ) And the average wind speed is (V
_air ) is a fixed value, the clothing surface temperature (T _cl ) is the measured value of the temperature sensor in the corresponding zone, the average radiant temperature (T _mrt ) is the measured value of the radiant temperature sensor, and the metabolic rate is
75 is a fixed value.

Then, the general control unit 20 outputs the calculated ambient temperature _Ta to the control unit 38 of the first partial air conditioner 14, and outputs the set temperature of the first partial air conditioner 14 to the ambient temperature _Ta.
(Step 305). Therefore, thereafter controls to match the room temperature in the first partial air-conditioning apparatus 14 to ambient temperature T _a.

Then, it is determined whether the room temperature has been set for all the partial air conditioners 14 and 16 (step 306).
). If not, return to step 302 and
Settings are made for the partial air conditioner 16 (step 302).
305). When the room temperature is set for all the partial air conditioners 14, 16, the operation mode of each of the partial air conditioners 14, 16 is detected, that is, the heating operation or the cooling operation, and all the partial air conditioners 14, 16 are detected. It is detected whether or not the operation modes are the same (step 307). If they match, the operation of each of the partial air conditioners 14, 16 is continued in the state at that time.

If the operation modes of any of the partial air conditioners 14 and 16 do not match, that is, if one of the partial air conditioners is in the heating operation and the other is in the cooling operation, the room temperature set value of the partial air conditioner performing the heating operation is changed. The measured value of the temperature sensor is used (step 308). As a result, the partial air conditioner stops the heating operation. In other words, when one is in heating and the other is in cooling operation, the cooling side is prioritized.

As described above, according to the air conditioner 10 of the present embodiment, the optimum ambient temperature is calculated for each of the zones 12a and 12b, and the partial air conditioners 14 and 16 installed in the respective zones 12a and 12b are calculated. Since a different set temperature is provided for each occupant, a room temperature suitable for each occupant in each of the zones 12a and 12b can be obtained, and the number of times of changing the temperature setting can be reduced. As a result, the frequency of occurrence of mixing loss can be reduced. Therefore, unnecessary waste of energy can be prevented, and the operating cost of the air-conditioning apparatus 10 can be reduced.

According to the air conditioner 10 of the present embodiment, when the operation mode of any of the partial air conditioners 14 and 16 does not match, the operation of the partial air conditioner that performs the heating operation is stopped. It is possible to prevent the air in each of the zones 12a and 12b from interfering with each other. As a result, the frequency of occurrence of mixing loss can be further reduced.

The embodiment described here is a preferred embodiment of the present invention, and the present invention is not limited to the embodiment, and can be variously modified and implemented without departing from the gist. Of course. For example, in the present embodiment, when the operation mode of any of the partial air conditioners 14 and 16 does not match, the operation of the partial air conditioner that performs the heating operation is stopped, but the operation is not limited to this. The operation of the partial air conditioner may be stopped. Also in this case, since the air in each of the zones 12a and 12b can be prevented from interfering with each other, the frequency of occurrence of mixing loss can be further reduced.

[0028]

As described above, the air conditioner according to the first aspect has a plurality of partial air conditioners, a radiation temperature sensor for measuring indoor radiation temperature, a radiation temperature and each partial air conditioner. A total control unit that calculates an optimal indoor temperature in the area in charge of the partial air conditioner based on the indoor temperature and the indoor humidity in the area, and sets the optimal indoor temperature in the control unit of the partial air conditioner. Since it is provided, the optimum ambient temperature can be calculated for each zone where the partial air conditioner is installed, and a different set temperature can be given to each of the partial air conditioners. For this reason, the room temperature becomes suitable for each resident in each zone, and the number of times of changing the temperature setting can be reduced. As a result, the frequency of occurrence of the mixing loss can be reduced, and unnecessary waste of energy can be prevented, and the operating cost of the air conditioner can be reduced.

In the air conditioner according to claim 2 or 3, the integrated control unit detects whether the air conditioner of each partial air conditioner is operating for heating or cooling, When a heating operation and a cooling operation are mixed among a plurality of air conditioning equipment, either the air conditioning equipment for heating operation or the air conditioning equipment for cooling operation is stopped, so that a plurality of air conditioning Among the harmony equipment, it is possible to prevent a heating operation and a cooling operation from being mixed. Therefore, it is possible to prevent the air in each zone from interfering with each other, so that the occurrence of mixing loss can be further reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an air conditioner of the present invention.

FIG. 2 is a schematic perspective view showing an installation state of the air conditioner in a room.

FIG. 3 is a flowchart showing the operation of the integrated control unit.

[Explanation of symbols]

 10 Air Conditioner 12 Indoor 14 First Part Air Conditioner 16 Second Part Air Conditioner 18 Radiation Temperature Sensor 20 General Control Unit 22 Air Conditioner 24 Air Conditioner 26 Temperature Sensor 28 Temperature Sensor 30 Humidity Sensor 32 Humidity Sensor 34 Indoor Temperature setting unit 36 Indoor temperature setting unit 38 Control unit 40 Control unit

Claims (4)

[Claims] 1. An air conditioner comprising a plurality of partial air conditioners in one room, and air-conditioning the interior of the room by the partial air conditioners for each area, wherein each of the partial air conditioners comprises: Air conditioning equipment that performs heat exchange to cool and heat the room, a temperature sensor that measures the temperature of the area in charge of the partial air conditioner, a humidity sensor that measures the humidity of the area in charge, and targets for the area in charge A temperature setting device for setting the temperature, and a control unit for changing the operating state of the air conditioning equipment, in order to match the room temperature measured by the temperature sensor with the set temperature set by the temperature setting device. In the air conditioner provided, a radiation temperature sensor for measuring a radiation temperature in the room, a radiation temperature obtained by the radiation temperature sensor and the respective partial air Calculating an optimum room temperature in the area in charge of the partial air conditioner based on the room temperature obtained by the temperature sensor of the sum device and the room humidity obtained by the humidity sensor; An air conditioner, comprising: a general control unit that is set in a control unit of the air conditioner. 2. The integrated control unit detects whether the air conditioning equipment of each of the partial air conditioners is operating for heating or cooling, and performs heating operation of the plurality of air conditioning equipment. The air-conditioning apparatus according to claim 1, wherein when there is a mixture of a heating operation and a cooling operation, the cooling operation is prioritized, and the air conditioning equipment that performs the heating operation is stopped or changed to the cooling operation. 3. The general control unit detects whether the air conditioning equipment of each of the partial air conditioners is operating for heating or cooling, and performs a heating operation of the plurality of air conditioning equipment. The air-conditioning apparatus according to claim 1, wherein when there is a mixture of a cooling operation and a cooling operation, the heating operation is prioritized, and the air-conditioning equipment that performs the cooling operation is stopped or changed to the heating operation. 4. The general control unit according to claim 1, wherein the average prediction answer (P
The air conditioner according to any one of claims 1 to 3, wherein an ambient temperature at which the MV value is zero is calculated, and the ambient temperature is set as a set temperature of each of the partial air conditioners. .