Air conditioning system and control method of air conditioning system

Abstract

The hot and cold water coil (8) uses hot and cold water as heat medium. The hot and cold water outlet pipe (3) and the hot and cold water return pipe (4) are connected to the hot and cold water coil (8) to allow hot and cold water to flow. The hot and cold water two-way valve 5 is installed on the hot and cold water return pipe (3). The remote controller (6) receives input of the air supply temperature setting value and the overall clothing level of one or more people in the room. The controller (2) corrects the air supply temperature setting value according to the temperature conversion value of the clothing level to obtain the air supply temperature correction setting value, and controls the hot and cold water two-way valve (5) according to the air supply temperature correction setting value.

Description

Technical Field

[0001] The present disclosure relates to an air conditioning system and a control method of the air conditioning system. Background Art

[0002] In the past, there is a known technology for controlling an air conditioner based on the amount of clothes a person wears. For example, the air conditioning control system described in Patent Document 1 includes a cloud parameter generation unit, an image capture unit, a sunlight calculation unit, a radiation temperature calculation unit, a PMV calculation unit, a temperature and humidity measurement unit, an input unit, and an air conditioning control parameter calculation unit. The input unit can input the amount of clothes worn and the amount of activity from a keyboard or numeric keys, and send this information to the PMV calculation unit.

[0003] The PMV calculation unit obtains the radiation temperature obtained by the radiation temperature calculation unit, the obtained indoor and outdoor temperature and indoor and outdoor humidity, the amount of clothing and the amount of activity input from the input unit, and calculates the comfort index value PMV using a preset calculation formula, and sends it to the air conditioning control parameter calculation unit. The air conditioning control parameter calculation unit obtains the comfort index value PMV obtained by the PMV calculation unit, calculates the set temperature using a preset calculation formula, and controls the air conditioning device according to the set temperature to adjust the indoor temperature.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2011-137612 Summary of the invention

[0007] Problem that the invention aims to solve

[0008] The air conditioning control system described in Patent Document 1 describes calculating a set temperature based on a variable amount of clothing that can be set by a user.

[0009] However, Patent Document 1 does not disclose a structure for achieving comfortable air conditioning according to a variable amount of clothing that can be set by a user by simple means.

[0010] Therefore, the present disclosure provides an air conditioning system and a control method of the air conditioning system that can realize comfortable air conditioning according to a variable amount of clothing that can be set by a user by simple means.

[0011] Means used to solve problems

[0012] The air conditioning system disclosed in the present invention comprises: a coil that uses cold water, warm water or cold and hot water as a heat medium; a delivery pipe and a return pipe that are connected to the coil and supply cold water, warm water or cold and hot water; a two-way valve installed on the return pipe; an input unit that accepts input of a supply air temperature setting value and input of the overall clothing level of one or more people in the room; and a controller that corrects the supply air temperature setting value based on a temperature conversion value of the clothing level, thereby obtaining a supply air temperature correction setting value, and controls the two-way valve based on the supply air temperature correction setting value.

[0013] The present invention discloses a control method for an air conditioning system, wherein the air conditioning system comprises: a hot and cold water coil; a hot and cold water outlet pipe and a hot and cold water return pipe, which are connected to the hot and cold water coil; a two-way valve installed on the hot and cold water return pipe; an indoor temperature sensor for detecting indoor temperature; an indoor humidity sensor for detecting indoor humidity; an air supply temperature sensor for detecting air supply temperature; an input unit; and a controller. The control method of the air-conditioning system comprises the following steps: an input unit accepts input of an indoor temperature setting value, an indoor humidity reference value, an air supply temperature setting value and a level of clothing amount; a controller obtains an indoor temperature correction setting value by adding the indoor temperature setting value and a temperature conversion value of the level of clothing amount, and the controller obtains an indoor temperature reset value based on a deviation obtained by subtracting the indoor temperature detected by the indoor temperature sensor from the indoor temperature correction setting value; the controller obtains an indoor humidity reset value based on a deviation obtained by subtracting the indoor humidity detected by the indoor humidity sensor from the indoor humidity reference value; the controller obtains an air supply temperature correction setting value by adding the air supply temperature setting value, the indoor temperature reset value and the indoor humidity reset value; and the controller performs proportional control, proportional integral control or proportional integral differential control on the two-way valve so that the air supply temperature detected by the air supply temperature sensor becomes the air supply temperature correction setting value.

[0014] Effects of the Invention

[0015] According to the present disclosure, comfortable air conditioning can be achieved by simple means according to the variable amount of clothing that can be set by the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a diagram showing the configuration of the air conditioning system according to the first embodiment.

[0017] Figure 2 It is a diagram showing the level Ca1 of the amount of clothing and its temperature conversion value Ca2.

[0018] Figure 3 This is a flowchart showing a control procedure of the air-conditioning system in the first embodiment.

[0019] Figure 41 is a diagram showing an example of the relationship between the deviation E2(n) and the amount of change ΔAP2(n) of the first operation amount.

[0020] Figure 5 2 is a diagram showing the relationship with the indoor temperature reset value RT1(n) corresponding to AP2(n).

[0021] Figure 6 1 is a diagram showing an example of the relationship between the deviation E3(n) and the change amount ΔAP3(n) of the second operation amount.

[0022] Figure 7 3 is a graph showing the relationship with the indoor humidity reset value RH(n) corresponding to AP3(n).

[0023] Figure 8 It is a diagram showing the structure of the controller 201 based on the supply air temperature included in the controller 2.

[0024] Fig. 9 This is a diagram showing a configuration when the controller 2 is realized using software. DETAILED DESCRIPTION

[0025] Hereinafter, embodiments will be described with reference to the drawings.

[0026] Implementation method 1.

[0027] Figure 1 It is a diagram showing the configuration of the air conditioning system according to the first embodiment.

[0028] The air conditioning system includes a fan coil unit 1, a hot and cold water outflow pipe 3, a hot and cold water return pipe 4, a hot and cold water two-way valve 5, a controller 2, an indoor temperature sensor 11, an indoor humidity sensor 12, an air supply temperature sensor 13 and a remote controller 6.

[0029] The fan coil unit 1 is embedded in the ceiling.

[0030] The fan coil unit 1 has built-in hot and cold water coils 8 and an air supply fan 7 .

[0031] The hot and cold water coil 8 is connected to the hot and cold water outlet pipe 3 and the hot and cold water return pipe 4 connected to the water-based central cooling and heating system or the heat storage system not shown. Hot and cold water flows in the hot and cold water outlet pipe 3 and the hot and cold water return pipe 4. The hot and cold water coil 8 uses hot and cold water as heat medium.

[0032] The blower fan 7 causes the exhaust air flow RA sucked from the indoor side to pass through the hot and cold water coil 8 to perform heat exchange, and blows the supply air flow SA into the indoor again as cold and hot air. The air flow rate of the blower fan 7 may be variable.

[0033] A two-way valve 5 for hot and cold water is installed on the hot and cold water return pipe 4 .

[0034] By increasing the opening of the hot and cold water two-way valve 5, the amount of hot and cold water flowing in the hot and cold water return pipe 4 increases, and the amount of hot and cold water retained in the hot and cold water coil 8 decreases. By decreasing the opening of the hot and cold water two-way valve 5, the amount of hot and cold water flowing in the hot and cold water return pipe 4 decreases, and the amount of hot and cold water retained in the hot and cold water coil 8 increases. Therefore, by controlling the opening of the hot and cold water two-way valve 5, the heat exchange efficiency of the hot and cold water coil 8 can be controlled. Thus, the air conditioning capacity of the air conditioning system can be controlled.

[0035] The indoor temperature sensor 11 detects the indoor temperature T1d.

[0036] The indoor humidity sensor 12 detects the indoor humidity Hd.

[0037] The supply air temperature sensor 13 detects the temperature of the supply air flow SA, that is, the supply air temperature T2d.

[0038] The remote controller 6 constitutes an input unit and receives inputs from the user of a room temperature setting value T1s(0), a room humidity reference value Hs, a supply air temperature setting value T2s(0), and a level Ca1 of the total amount of clothing worn by one or more people in the room.

[0039] Figure 2 It is a diagram showing the level Ca1 of the amount of clothing and its temperature conversion value Ca2.

[0040] like Figure 2 As shown, during heating, the level Ca1 of the amount of clothing is 5 levels: level 5 "more clothing", level 4 "slightly more clothing", level 3 "normal", level 2 "slightly less clothing", and level 1 "less clothing". The temperature conversion values ​​Ca2 are "-α2°C", "-α1°C", "0°C", "+α1°C", and "+α2°C", respectively.

[0041] exist Figure 2 α1 and α2 are positive values, and α2>α1. For example, α1=1 and α2=2 may be used.

[0042] Figure 3 This is a flowchart showing a control procedure of the air-conditioning system in the first embodiment.

[0043] In step S101, the controller 2 receives input of the indoor temperature setting value T1s(0), the indoor humidity reference value Hs, the supply air temperature setting value T2s(0), and the level Ca1 of the total amount of clothing worn by one or more people in the room from the user via the remote controller 6. The controller 2 sets the time n to 1, and sets the initial value AP(0) of the actual opening, the first operation amount AP2(0), and the second operation amount AP3(0) to 50%.

[0044] In step S102, the controller 2 obtains the indoor temperature correction setting value T1s by adding the indoor temperature setting value T1s(0) to the temperature conversion value Ca2 of the level Ca1 of the amount of clothing.

[0045] In step S103 , the controller 2 acquires the indoor temperature T1d(n) detected by the indoor temperature sensor 11 .

[0046] In step S104, the controller 2 obtains a deviation E2(n) obtained by subtracting the indoor temperature T1d(n) from the indoor temperature correction set value T1s.

[0047] Figure 4 2 is a diagram showing an example of the relationship between the deviation E2(n) and the change amount ΔAP2(n) of the first operation variable. Figure 4 Based on the relationship shown in FIG. 1 , the change amount ΔAP2(n) of the first operation variable corresponding to the deviation E2(n) is obtained.

[0048] The controller 2 obtains the first manipulated variable AP2(n) at time n by adding ΔAP2(n) to the first manipulated variable AP2(n-1) one time ago.

[0049] Figure 5 is a diagram showing the relationship between the indoor temperature reset value RT1(n) corresponding to AP2(n). Figure 5 The indoor temperature reset value RT1(n) corresponding to AP2(n) is obtained from the relationship shown in FIG. Figure 5 , the indoor temperature reset value RT1(n) is calculated as the proportional integral control amount corresponding to the deviation E2(n), but the controller 2 can also calculate the indoor temperature reset value RT1(n) as the proportional control amount or proportional integral differential control amount corresponding to the deviation E2(n).

[0050] In addition, the first operation amount AP2 (n) is used to obtain the indoor temperature reset value RT1 (n), and the controller 2 does not control the hot and cold water two-way valve 5 based on the first operation amount AP2 (n).

[0051] In step S105 , the controller 2 obtains the indoor humidity Hd(n) detected by the indoor humidity sensor 12 .

[0052] In step S106, the controller 2 obtains a deviation E3(n) obtained by subtracting the indoor humidity Hd(n) from the indoor humidity reference value Hs.

[0053] Figure 6 : is a diagram showing an example of the relationship between the deviation E3(n) and the change amount ΔAP3(n) of the second operation variable. Figure 6Based on the relationship shown in FIG. 1 , the change amount ΔAP3(n) of the second operation amount corresponding to the deviation E3(n) is obtained.

[0054] The controller 2 adds ΔAP3(n) to the second manipulated variable AP3(n-1) at the previous time, thereby obtaining the second manipulated variable AP3(n) at time n.

[0055] Figure 7 is a graph showing the relationship between the indoor humidity reset value RH(n) corresponding to AP3(n). Figure 7 The indoor humidity reset value RH(n) corresponding to AP3(n) is obtained by using the relationship shown in FIG. Figure 7 , the indoor humidity reset value RH(n) is calculated as the proportional integral control amount corresponding to the deviation E3(n), but the controller 2 can also calculate the indoor humidity reset value RH(n) as the proportional control amount or proportional integral differential control amount corresponding to the deviation E3(n).

[0056] In addition, the second operation amount AP3 (n) is used to obtain the indoor humidity reset value RH (n), and the controller 2 does not control the hot and cold water two-way valve 5 based on the second operation amount AP3 (n).

[0057] In step S107, the controller 2 obtains a supply air temperature correction set value T2s(n) by adding the supply air temperature set value T2s(0), the indoor temperature reset value RT1(n), and the indoor humidity reset value RH(n).

[0058] In step S108 , the controller 2 obtains the supply air temperature T2d(n) detected by the supply air temperature sensor 13 .

[0059] In step S109, the controller 2 performs proportional control, proportional integral control or proportional integral differential control on the hot and cold water two-way valve 5 so that the supply air temperature T2d(n) becomes the supply air temperature correction set value T2s(n).

[0060] Figure 8 It is a diagram showing the structure of the controller 201 based on the supply air temperature included in the controller 2.

[0061] The controller 201 includes a subtractor 22 and an adjuster 21. The subtractor 22 obtains a deviation E1(n) obtained by subtracting the supply air temperature T2d(n) from the supply air temperature correction set value T2s(n). The adjuster 21 proportionally controls the cold and hot water two-way valve 5 by outputting an operation amount proportional to the deviation E1(n) to the cold and hot water two-way valve 5. Thus, the actual opening AP(n) of the cold and hot water two-way valve 5 is determined.

[0062] In addition, the controller 201 may also perform proportional-integral control or proportional-integral-differential control on the hot and cold water two-way valve 5 based on the supply air temperature T2d.

[0063] In step S110 , if an end instruction is input, the process ends, and if an end instruction is not input, the process proceeds to step S111 .

[0064] In step S111, the controller 2 increments the time n. Thereafter, the process returns to step S103.

[0065] As described above, according to this embodiment, for example, in a university lecture room, even if there are no same people in a fixed place every time and the clothes are changed every time, the level of the amount of clothing can be changed by the remote controller. Thus, comfortable air conditioning can be achieved with simple means.

[0066] Variation example.

[0067] (1) Cold water coil and hot water coil

[0068] In the above-mentioned embodiment, the air conditioning system is provided with a hot and cold water coil that uses hot and cold water as a heat medium, but it may also be provided with a cold water coil that uses cold water as a heat medium in cooling and a hot water coil that uses hot water as a heat medium in heating. In this case, a cold water outlet pipe and a cold water return pipe are connected to the cold water coil, and a cold water two-way valve is installed on the cold water return pipe. A hot water outlet pipe and a hot water return pipe are connected to the hot water coil, and a hot water two-way valve is installed on the hot water return pipe. The controller controls the cold water two-way valve in the same manner as described in the above-mentioned embodiment in cooling, and controls the hot water two-way valve in the same manner as described in the above-mentioned embodiment in heating.

[0069] (2) Level of clothing volume

[0070] In the above embodiment, the number of levels of clothing amount is set to 5, but it is not limited thereto, and any number of levels is sufficient. Alternatively, the number of levels of clothing amount may be set to an odd number, and the temperature conversion value of the middle level may be set to "0°C" as in the above embodiment.

[0071] (3) Controller

[0072] Fig. 9 1 is a diagram showing a configuration in which the controller 2 is realized by software. The controller 2 includes a processor 1001 and a memory 1002 connected to a bus 1003. The processor 1001 executes a program stored in the memory 1002.

[0073] The embodiments disclosed herein are to be considered in all respects as illustrative and non-restrictive. The scope of the present disclosure is indicated by the claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the claims.

[0074] Description of Reference Numerals

[0075] 1 fan coil unit, 2 controller, 3 hot and cold water outlet pipes, 4 hot and cold water return pipes, 5 hot and cold water two-way valves, 6 remote controller, 7 air supply fan, 8 hot and cold water coils, 11 indoor temperature sensor, 12 indoor humidity sensor, 13 air supply temperature sensor, 21 adjuster, 22 subtractor, 201 controller, 1001 processor, 1002 memory, 1003 bus.

Claims

1. An air conditioning system comprising: Coils, which utilize cold, warm, or hot and cold water as the heat medium; Outlet pipes and return pipes are connected to the coils for the flow of cold water, warm water or hot and cold water; A two-way valve installed on the return pipe; an input unit that receives input of a supply air temperature setting value and input of a level of total clothing amount of one or more persons present in the room; and a controller that corrects the air supply temperature setting value based on the temperature conversion value of the level of the amount of clothing to thereby obtain a corrected air supply temperature setting value, and controls the two-way valve based on the corrected air supply temperature setting value, The air conditioning system comprises: An indoor temperature sensor for detecting indoor temperature; an indoor humidity sensor for detecting indoor humidity; and a supply air temperature sensor for detecting the supply air temperature, The input unit receives input of an indoor temperature setting value, an indoor humidity reference value, an air supply temperature setting value, and a level of clothing amount, The controller obtains a corrected indoor temperature setting value by adding the indoor temperature setting value to the temperature conversion value of the level of the amount of clothing worn. the controller obtains an indoor temperature reset value based on a deviation obtained by subtracting the indoor temperature detected by the indoor temperature sensor from the indoor temperature correction set value, The controller obtains an indoor humidity reset value based on a deviation obtained by subtracting the indoor humidity detected by the indoor humidity sensor from the indoor humidity reference value. The controller obtains a supply air temperature correction set value by adding the supply air temperature set value, the indoor temperature reset value, and the indoor humidity reset value. The controller performs proportional control, proportional-integral control, or proportional-integral-differential control on the two-way valve so that the supply air temperature detected by the supply air temperature sensor becomes the supply air temperature correction set value.

2. The air conditioning system according to claim 1, wherein: The number of levels of the amount of clothing is an odd number, When the level of the amount of clothing is at a middle value, the temperature conversion value of the level of the amount of clothing is 0. When the level of the amount of clothing is less than the median value, the temperature conversion value of the level of the amount of clothing is positive, and when the level of the amount of clothing is greater than the median value, the temperature conversion value of the level of the amount of clothing is negative.

3. The air conditioning system according to claim 1 or 2, wherein: The level of the amount of clothing is from level 1 to level 5. When the level of the amount of clothing is the first level, the temperature conversion value of the level of clothing is α2, when the level of the amount of clothing is the second level, the temperature conversion value of the level of clothing is α1, when the level of the amount of clothing is the third level, the temperature conversion value of the level of clothing is 0, when the level of the amount of clothing is the fourth level, the temperature conversion value of the level of clothing is -α1, and when the level of the amount of clothing is the fifth level, the temperature conversion value of the level of clothing is -α2, wherein α1 and α2 are positive values, and α2>α1.

4. A control method for an air conditioning system, the air conditioning system comprising: Hot and cold water coils; Hot and cold water outgoing pipes and hot and cold water return pipes, which are connected to the hot and cold water coils; A two-way valve installed on the hot and cold water return pipe; An indoor temperature sensor for detecting indoor temperature; Indoor humidity sensor to detect indoor humidity; a supply air temperature sensor for detecting supply air temperature; an input unit; and Controller, The control method of the air conditioning system comprises the following steps: The input unit receives input of an indoor temperature setting value, an indoor humidity reference value, an air supply temperature setting value, and a level of clothing amount; The controller obtains a corrected indoor temperature setting value by adding the indoor temperature setting value to the temperature conversion value of the level of the amount of clothing worn. The controller obtains an indoor temperature reset value based on a deviation obtained by subtracting the indoor temperature detected by the indoor temperature sensor from the indoor temperature correction set value; The controller obtains an indoor humidity reset value based on a deviation obtained by subtracting the indoor humidity detected by the indoor humidity sensor from the indoor humidity reference value; The controller obtains a supply air temperature correction set value by adding the supply air temperature set value, the indoor temperature reset value, and the indoor humidity reset value; and The controller performs proportional control, proportional-integral control, or proportional-integral-differential control on the two-way valve so that the supply air temperature detected by the supply air temperature sensor becomes the supply air temperature correction set value.

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