JP3919046B2 - Air conditioner and hot water circuit using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air conditioner that heats a room with hot water generated by a hot water supply source, and Using It relates to a hot water circuit.
[0002]
[Prior art]
A heating system that heats a room (a room to be conditioned) using hot water is disclosed in, for example, Japanese Patent Application Laid-Open No. 7-217917. In this case, a plurality of radiators are connected to the heat source device serving as the hot water supply source via a circulation path or a radiator, and the heating operation is performed by the radiator using the heat of the hot water generated by the heat source device. It is something that demonstrates.
[0003]
And as a typical example of this heat radiator, an air conditioner and a floor heater are mentioned. In addition, the adjustment of the heating action in this air conditioner or the like is usually performed by controlling the flow rate of hot water using a flow rate variable valve or the like.
[0004]
[Problems to be solved by the invention]
By the way, in the situation where the room temperature is particularly low, a rapid start-up of heating is expected, but in such a case, since the flow rate variable valve has only been fully opened in the related art, there is a limit to improving the heating action.
[0005]
The present invention has been made to solve the conventional technical problems, and provides an air conditioner with improved start-up when heating a conditioned room with hot water and a hot water circuit using the same. Is.
[0006]
[Means for Solving the Problems]
An air conditioner according to a first aspect of the present invention includes a blower and The temperature was controlled in multiple stages by controlling the amount of heating. It is equipped with a hot water heat exchanger that circulates hot water and is configured to enable heating operation of the conditioned room. , Adjust the flow rate of hot water circulating through the hot water heat exchanger so that the room temperature of the conditioned room reaches the set temperature. The opening of the variable flow valve to be adjusted is based on the difference between the set temperature and room temperature. And controlling the hot water circulating through the hot water heat exchanger when the temperature difference between the room temperature and the set temperature exceeds the first predetermined value at the start of the heating operation. Be controlled A controller for outputting a signal for raising the temperature to the hot water supply source of hot water is provided.
[0007]
In the air conditioner of the invention of claim 2, in the above, when the control device reaches a set time after outputting a signal for raising the temperature of the hot water, or the temperature difference between the room temperature and the set temperature is smaller than the first set value. The temperature of the hot water circulating through the hot water heat exchanger when the set value is below 2 1 step The lowering signal is output to the hot water supply source.
[0008]
An air conditioner according to a third aspect of the present invention is the air conditioner according to the first aspect, wherein the control device outputs a signal for raising the temperature of the hot water circulating in the hot water heat exchanger to the hot water hot water supply source during the trial operation of the heating operation. No action It has a configuration.
[0009]
The air conditioner according to a fourth aspect of the present invention is the air conditioner according to the first aspect, wherein when the temperature of the hot water circulating through the hot water heat exchanger is set high when the heating operation is stopped, the control device delays the operation stop of the blower. Provide delay mechanism At the same time, the delay time is calculated based on the temperature in the vicinity of the hot water heat exchanger. Is.
[0010]
An air conditioner according to a fifth aspect of the present invention is the air conditioner according to the first aspect of the present invention. When the supply temperature to the room to be conditioned exceeds a predetermined high temperature, a variable flow valve is used based on the set temperature of the hot water circulating through the hot water heat exchanger. A correction mechanism is provided for correcting the circulation amount of the hot water so that the temperature in the vicinity of the hot water heat exchanger does not increase.
[0011]
According to such a configuration, a large heating capacity can be obtained at the start-up that requires a high heating capacity, and the rise time of the heating operation can be shortened. In particular, by regulating this high temperature hot water supply condition, it is possible to suppress an abnormal temperature rise of the air conditioner, particularly the indoor unit, and to stabilize the operation of the air conditioner.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an air conditioner of the present invention and a hot water circuit using the air conditioner. A floor heater and an air conditioner are connected to a hot water circuit 20 extending from a hot water supply source 22.
[0013]
The warm water supply source circulates warm water between the warm water circuits, and the supply temperature to the warm water circuit can be set in three stages: + 60 ° C., + 80 ° C., + 90 ° C. (hereinafter, + is omitted). . The temperature control of the hot water is performed by controlling the heating amount (for example, the combustion amount or the heating amount of the heater) of the hot water at the hot water supply source.
The hot water supply source is not limited to a dedicated hot water supply source, and may be provided with a general hot water supply hot water circuit in addition to the hot water circuit.
[0014]
The floor heater opens an on-off valve (not shown) during operation, draws hot water from the hot water circuit 20 and circulates it, and then returns it to the hot water circuit 20 again. At this time, the floor heater outputs a signal for discharging hot water of 60 ° C. to the hot water supply source 22, and the hot water supply source circulates the hot water of 60 ° C. in the hot water circuit 20 in response to this signal.
[0015]
The air conditioner is composed of an indoor unit 1 and an outdoor unit 2. Referring to FIGS. 1 and 2, the indoor unit 1 is configured as a wall-hanging type, and is air-conditioned by an air suction port 1a for sucking air in the conditioned room on the front surface and the indoor unit 1 arranged below the air intake port 1a. An air outlet 1b for returning conditioned air to the conditioned room is provided.
[0016]
As shown in FIG. 2, the air filter 1c, the indoor side heat exchanger 3, and the air blower 4 are arrange | positioned in the inside of the indoor unit 1 in the air path which connects the air inlet 1a and the air blower outlet 1b in order. The indoor heat exchanger 3 is configured integrally with a refrigerant flow path 11 constituting the refrigerant circuit 10 and a flow path 21 (warm water heat exchanger) through which hot water from the hot water circuit 20 flows share the same fins. (The heat exchanger for the refrigerant in which the refrigerant flows and the heat exchanger for the hot water in which the hot water flows may be configured independently and arranged so as to be adjacent to each other).
[0017]
Hot water is supplied from the hot water circuit 20 by opening the flow rate variable valve 23 to the flow path 21 through which the hot water flows, and after the heat is radiated through the flow path 21, the hot water is returned to the hot water circuit 20 again. . At this time, similarly to the floor heater, a signal for outputting hot water of 80 ° C. or hot water of 90 ° C. to the hot water circuit 20 is output to the hot water supply source 22.
[0018]
The refrigerant flow path 11 can cool or heat the conditioned air sucked from the suction port 1a by acting as a refrigerant evaporator or a refrigerant condenser.
[0019]
The blower 4 is a cross-flow fan provided on the leeward side of the indoor heat exchanger 3, and indoor air sucked from the air inlet 1 a by the operation of the blower 4 is cooled or heated by the indoor heat exchanger 3. Then, the air is blown out into the room again from the air outlet 1b.
[0020]
A drain pan 5 for receiving drain dripping from the indoor heat exchanger 3 is provided below the indoor heat exchanger 3, and a wind direction changing plate 6 for changing the discharge direction of the conditioned air is provided at the air outlet 1b. Each is provided.
[0021]
The outdoor unit 2 is formed in an outdoor stationary type and includes a blower 7 that ventilates the heat source side heat exchanger 12 in the refrigerant circuit 10.
[0022]
The refrigerant circuit 10 includes a refrigerant flow path 11 of the indoor heat exchanger 3, a heat source side heat exchanger 12 arranged in the outdoor unit 2, a compressor 13, an accumulator 14, and a decompression device 15 such as a capillary tube. And one end of the indoor heat exchanger 3 is connected to one end of the heat source side heat exchanger 12 via the pressure reducing device 15, and the other end of the indoor side heat exchanger 3 is the fourth one of the four-way valves 16. The refrigerant outlet 16a of the first heat exchanger 12 is connected to the second refrigerant inlet / outlet 16b of the four-way valve 16 at the other end of the heat source side heat exchanger 12, and the refrigerant outlet side of the compressor 13 is connected to the third refrigerant inlet / outlet 16c of the four-way valve 16. The fourth refrigerant inlet / outlet port 16 d of the valve 16 is connected to the refrigerant suction side of the compressor 13 via the accumulator 14 through a refrigerant pipe.
[0023]
That is, in this refrigerant circuit 10, when the four-way valve 16 is switched and the refrigerant discharged from the compressor 13 is circulated in the direction of the solid line arrow in the figure, the refrigerant flow path 11 of the indoor heat exchanger 3 is connected to the evaporator. As a result, the cooling operation is performed. Further, when the refrigerant discharged from the compressor 13 is circulated in the direction of the broken line arrow by switching the four-way valve 16, the refrigerant flow path 11 of the indoor heat exchanger 3 acts as a condenser to perform heating operation. Is made. A large heating capacity can be obtained by combining the heating operation using the refrigerant and the heating operation using hot water. However, the refrigerant flow may be configured so that only the cooling operation can be performed without using the four-way valve 16.
[0024]
FIG. 3 is a schematic diagram showing an embodiment of the signal flow of the present invention. In this figure, the floor heater includes a floor heating control device and outputs a signal requesting hot water of 60 ° C. to the filter mechanism via a signal line as the floor heating starts. The signal requesting the hot water is intermittently output so that the average value of the heat generation temperature on the floor surface is constant. In addition, when this floor heater is equipped with a configuration (such as a hot water flow rate variable valve) that automatically controls the amount of hot water circulating through the floor heater so that the heating temperature of the floor surface is constant, The hot water may be required during the heating operation. Further, a signal requesting hot water hot water / a signal for stopping hot water may be output.
[0025]
The hot water supply source 22 includes the hot water supply source control device, and when the warm water supply source control device is given a signal requesting hot water of 60 ° C., for example, the hot water temperature to the hot water circuit 20 is 60 ° C. Thus, the combustion amount (heating amount) is controlled. At this time, the water pressure of the hot water circulating through the hot water circuit 20 is controlled by the circulation pump so as to be substantially constant. When the water pressure is not controlled, a constant speed pump may be used for this pump.
[0026]
The air conditioner includes an indoor unit and an outdoor unit, and each unit includes an indoor unit control device and an outdoor unit control device. From the outdoor unit control device, a signal requesting hot water of 60 ° C., a signal requesting hot water of 80 ° C., a signal requesting hot water of 90 ° C., a stop requesting hot water depending on the operating condition of the air conditioner A signal is output.
[0027]
FIG. 4 is a schematic diagram of the filter mechanism, and adjusts signals between a plurality of devices connected to the hot water circuit and the hot water supply source. As a form of the signal output from the device, (1) One that outputs only a 60 ° C. hot water request signal (floor heater in this embodiment), that is, one that applies a voltage signal to terminal A with respect to a common line (ground wire). Terminals B and C open (2) A device that outputs a 60 ° C. hot water request signal and an 80 ° C. hot water request signal, that is, a device that applies a voltage signal to the terminal A or the terminal B with respect to the common line (ground wire). Terminal C is open, (3) Terminals A and B for a 60 ° C. tapping request signal, 80 ° C. tapping request signal, 90 ° C. tapping request signal (air conditioner of this embodiment), that is, a common line (ground wire) Applies a voltage signal to C. (4) The signal is serially communicated, (2), (3) There is something that sends the signal of as a temperature bit, as a hot water supply source (1) Controlling the tapping temperature required by the potential of terminals A, B, C, (2) Some of them determine the temperature bit signal by serial communication.
[0028]
There are 6 interfaces on the input side, and 6 devices can be connected. Three of these circuits are provided with a changeover switch between a static input and a serial input, and are configured so as to be compatible with both inputs. When connecting the signal line from the air conditioner to the interface circuit, the serial input is enabled by the switch and the signal line is connected between the terminal A and the common line.
[0029]
When connecting the signal line from the floor heater, the signal line is connected between the terminal A and the common line. In addition, when the signal which requests | requires the hot water of 80 degreeC temperature and 90 degreeC temperature is output with another apparatus, what is necessary is just to connect a signal line to the terminal B and the terminal C, respectively.
[0030]
The form of the tapping signal is defined as shown in FIG. (In the case of static, it is the potential with respect to the common line, and in the case of serial, it is the state of the corresponding bit.)
Note that the state of the potential of each interface is determined by scanning by the control unit in the case of static, and the state of the corresponding bit is determined after reading a series of data following the leader code in the case of serial. Further, the hot water supply source also operates according to this signal form, and since the static / serial output switching is performed by the switch, it can be matched with the signal form of the hot water supply source.
[0031]
In the operation flowchart of the filter mechanism shown in FIG. 6, first, the state of the input terminal is scanned and stored, and based on the stored state, the hot water at 60 ° C., 80 ° C., and 90 ° C. is first applied to any terminal. If there is no signal for requesting, the signal for stopping the hot water supply source is output.
[0032]
Next, if there is a signal requesting 80 ° C. hot water at any terminal, that is, if any device requests 80 ° C. hot water, another device requests 60 ° C. hot water, or 90 ° C. The hot water supply signal of 80 ° C. is output to the hot water supply source even when there is a hot water demand.
[0033]
Next, if there is no 80 ° C. hot water request signal and one of the devices requests 60 ° C. hot water, 60 ° C. will be supplied to the hot water supply source even if another device requests 90 ° C. hot water. The warm water supply signal is output.
[0034]
Next, when there is no further 80 ° C. hot water request and 60 ° C. hot water request and there is only 90 ° C. hot water request, a 90 ° C. hot water supply signal is output to the hot water supply source.
[0035]
Thereafter, a temperature signal to be output to the hot water supply source is selected and output based on the state of each input terminal. In addition, when there is a 90 ° C. hot water request when only a 60 ° C. hot water request is made, a 60 ° C. hot water request is output to the hot water supply source in the above flow chart. Only when conditions are met, a hot water supply request of 80 ° C. may be output to the hot water supply source.
[0036]
By such a filter mechanism, the priority order of the tapping temperature is ordered as 80 ° C.> 60 ° C.> 90 ° C.
[0037]
The filter mechanism is configured as a control circuit separated from the hot water supply source. However, the filter mechanism may be incorporated into the hot water supply source control device, or the filter mechanism may be incorporated into the control device of the air conditioner. good. At this time, wiring is performed so that signals from other devices gather in the air conditioner.
[0038]
7 is an indoor unit control device, FIG. 8 is an outdoor unit control device, and FIG. 9 is a hot water supply source control device.
As shown in FIG. 7, the control system of the indoor unit 1 includes a microcomputer 30, a motor drive circuit 31 that drives the indoor fan motor M <b> 1 by a signal from the microcomputer 30, and the indoor fan motor via the motor drive circuit 31. A motor power supply circuit 32 for supplying power to M1, a control power supply circuit 33 for supplying power to the microcomputer 30, a switch board 34 provided with an operation switch for the indoor unit 1, and a remote operation signal from a wireless remote controller (ON / OFF signal, cooling / heating / dehumidification mode switching signal, indoor temperature setting signal, timer reservation signal, etc.), demodulating this remote operation signal and supplying it to the microcomputer 30 and operation It is provided with a display plate 36 for displaying status (operation display, timer reservation display, abnormality display) and a flap motor M2 for driving a wind direction change plate. Source circuit 32 and the control power supply circuit 33 is connected to the plug for power supply via the rectifier circuit 37.
[0039]
The microcomputer 30 includes an indoor temperature sensor 38 that detects the indoor temperature, a humidity sensor 39 that detects the indoor humidity, and a hot water temperature that detects the temperature of the flow path 21 through which the hot water in the indoor heat exchanger 3 flows. Sensors 40 are connected, and the detection values of these sensors are captured by the microcomputer 30 after A / D conversion.
[0040]
Further, a pulse motor (PM) drive circuit 42 and a flow rate variable valve 23 for controlling the flow rate of hot water are connected to the microcomputer 30 via a driver 41, and the opening degree of the flow rate variable valve 23 is controlled by a signal from the microcomputer 30. Is done. The flow rate variable valve 23 has its opening degree divided into a range of 4000 pulses from fully open to fully closed, and the output speed of the pulse for changing the opening by the PM drive circuit 42 is 30 in the time from fully open to fully closed. It is set to be within a range of seconds to 40 seconds. Further, the rotational speed of the indoor fan motor M1 is controlled by a signal from the microcomputer 30.
[0041]
The indoor unit 1 is provided with terminals T1, T2 and T3, AC power is sent to the outdoor unit 2 via the terminals T1 and T2, and a control signal from the microcomputer 30 is sent to the outdoor unit via the serial circuit 43 and the terminal T3. Sent to 2.
[0042]
As shown in FIG. 8, the control system of the outdoor unit 2 includes a microcomputer 50, a motor drive circuit 51 that drives the compressor 13 with a signal from the microcomputer 50, and a control power supply circuit 52 that supplies power to the microcomputer 50. And a serial circuit 53 (connected to the terminal A of the filter mechanism and the common terminal COM) for outputting a signal of the above-described format to the hot water supply source 22 of the hot water circuit 20.
[0043]
The outdoor unit 2 is provided with terminals T1, T2, T3 corresponding to the indoor unit 1, and the electric power from the indoor unit 1 applied to the terminals T1, T2 is varistor 55, noise filter 56, voltage doubler circuit 57, noise filter. The motor drive circuit 51 and the control power supply circuit 52 are supplied via 58 and the smoothing circuit 59. The current flowing through the terminal T1 is detected by a current transformer 60 (C.T.) and given to the microcomputer 50 via the current detection circuit 61.
[0044]
The control signal from the indoor unit 1 sent to the terminal T3 is given to the microcomputer 50 via the serial circuit 62. An outdoor fan motor M3 is connected to the microcomputer 50 through a driver 63, a triac 64, and an air volume adjustment circuit 65, and similarly, the four-way valve 16 of the refrigerant circuit 10 is connected through the driver 63.
[0045]
The switching operation of the four-way valve 16 and the rotation speed control of the fan motor M3 are performed by a signal from the microcomputer 50. The microcomputer 50 is connected to an outside air temperature sensor 66 that detects the temperature of the outside air and a discharge temperature sensor 67 that detects the refrigerant temperature on the discharge side of the compressor 13. / D convert and import.
[0046]
As shown in FIG. 9, the control system of the hot water supply source 22 includes a heat source machine control circuit 69. A discharge temperature sensor 68 for detecting the temperature of hot water on the discharge side of the hot water supply source 22 is connected to the heat source machine control circuit 69, and the hot water circuit 20 is controlled based on the detected value of the discharge temperature sensor 68.
[0047]
When performing the cooling operation in the air conditioner configured as described above, the first refrigerant inlet / outlet 16a and the fourth refrigerant inlet / outlet 16d, the second refrigerant inlet / outlet 16b and the third refrigerant inlet / outlet 16c of the four-way valve 16 are provided. The compressor 13 is operated by communicating with each other. As a result, the refrigerant in the refrigerant circuit 10 circulates in the cooling cycle as shown by the solid line in FIG. 1, evaporates in the refrigerant flow path 11 in the indoor heat exchanger 3, and condenses in the heat source side heat exchanger 12.
[0048]
As a result, the air cooled by the indoor side heat exchanger 3 is blown out from the indoor unit 1 to cool the room. At that time, the operation of the compressor 13 is controlled based on the preset temperature inputted in advance and the temperature detected by the indoor temperature sensor 38, and the room is kept at this preset temperature.
[0049]
Further, when performing heating operation in the air conditioner, the flow rate variable valve 23 is opened, and a hot water supply signal is sent to the hot water supply source 22. Thereby, hot water circulates from the hot water circuit 20 as shown by the solid line in FIG. As a result, the air heated in the hot water flow path 21 of the indoor heat exchanger 3 is blown out from the indoor unit 1 and the room is heated.
[0050]
At this time, the opening degree of the flow variable valve 23 is controlled based on the preset temperature inputted in advance and the temperature detected by the room temperature sensor 38, and the room is kept at the set temperature. Hereinafter, the heating operation using the hot water according to the flowcharts of FIGS. 10 and 11 will be described. In the flowchart of FIG. 10, the difference between the set temperature and the room temperature is obtained in step S1, and the room temperature is set in the range of 0 (fully closed) to 4000 (fully open) based on this difference. It adjusts to become a value. A method for calculating the valve opening is not particularly limited because a fuzzy calculation based on a temperature difference and a change amount of the temperature difference or a method based on PID control can be used.
[0051]
In step S2, the temperature of the hot water requesting hot water supply to the hot water supply source 22 is turned off (0 ° C.) based on the valve opening degree of the flow rate variable valve 23 obtained in step S1, the temperature difference between the set temperature and room temperature, the room temperature, Set from 60 ° C or 80 ° C. It is related so that the hot water temperature becomes higher when the heating load of the conditioned room is large.
[0052]
If there is no function for requesting hot water of 90 ° C., the process proceeds to step S9 following step S1 and step S2, and a signal requesting hot water at the temperature set in step S2 is output to the hot water supply source 22. The heating operation is controlled.
[0053]
Further, the step of calculating the opening degree of the flow variable valve 23 and the change of the hot water temperature are performed at intervals of about 3 minutes, and frequent changes and chattering are suppressed.
[0054]
In step S3, it is determined whether or not a test operation is being performed. If the test operation is being performed, the process proceeds to step S9. If the test operation is not being performed, the process proceeds to step S4.
[0055]
In step S4, it is determined whether or not 30 minutes have elapsed since the start of the heating operation. If 30 minutes have elapsed, the process proceeds to step S9. Therefore, if it exceeds 30 minutes after starting the heating operation with warm water, only the 60 ° C. or 80 ° C. hot water is obtained. This time is not limited to 30 minutes, but is optimally set according to the heating capacity of the entire system and the size of the air conditioning load.
[0056]
If it is within 30 minutes from the start of heating operation, it is determined in step S5 and step S6 whether the tapping temperature is set to 60 ° C or 80 ° C.
[0057]
Next, when the set temperature is set to 80 ° C., it is determined in step S7 whether or not the difference between the set temperature and room temperature (set temperature−room temperature) is greater than 3 ° C. When this condition is satisfied, step S8 is performed. And set the temperature of hot water to 90 ° C. In step S9, the set hot water temperature is output to the hot water supply source 22.
In the present embodiment, the setting and release of the 90 ° C. hot water is performed by the condition judgment in step S7 (3 ° C. (first set temperature) for setting the 90 ° C. hot water and the 90 ° C. hot water are released). 3 ° C (second set temperature) is matched, but when the cycle for changing the tapping temperature is shortened to 1 minute and 30 seconds, the second set temperature is set to 2 ° C and 1.5 ° C. The chattering is prevented by making the temperature lower than the set temperature of 1. Therefore, the first set temperature and the second set temperature may be matched or may be set to different values.
[0058]
As described above, when the difference between the room temperature and the set temperature is 3 ° C. or more within 30 minutes from the start of the heating operation with hot water, the trial operation is not being performed, and the tapping temperature setting in step S2 is 80 ° C. A signal requesting hot water supply at 90 ° C. is output to the hot water supply source 22. When these conditions are not satisfied, a signal requesting hot water at the temperature obtained in step S2 is output to the hot water supply source 22.
[0059]
Further, the temperature difference of “3 ° C.” used in the determination in step S7 is not limited to this, and may be changed so that it is large when the room temperature is high and small when the room temperature is low. That is, when the room temperature is high, it is difficult to request 90 ° C. hot water, and when the room temperature is low, it is easy to request 90 ° C. hot water.
[0060]
If an operation for stopping operation is performed during operation based on such a flowchart, the flow rate variable valve 23 is first fully closed in step S21 of FIG. At this time, the speed at which the valve opening degree of the variable flow valve 23 is changed is set so that it takes 30 to 40 seconds from fully closed to fully open, so that the variable flow valve 23 closes suddenly and there is a problem such as a water hammer. Suppresses what happens.
[0061]
In step S22, it is determined whether the tapping temperature is set to 90 ° C. When the hot water temperature is not set at 90 ° C., a hot water supply stop signal is output to the hot water supply source (filter mechanism) in step S23, and the process proceeds to step S24 and step S25 to turn off the blower lamp and stop the blower. Stop heating operation.
[0062]
When the hot water temperature is set to 90 ° C., a hot water supply stop signal is output to the hot water supply source (filter mechanism) in step S26, and then the delay time is calculated in step S28 while the blower lamp is turned on in step S27. I do. This delay time is calculated based on the temperature of the flow path 21 through which the hot water of the indoor heat exchanger 3 flows is detected by the hot water temperature sensor 40. This delay time is the time when the temperature of the indoor heat exchanger 3 is at least 80 ° C. or less (preferably close to 60 ° C.) by the air blower after the heating operation is stopped. This delay time may be fixed to about 30 seconds instead of being calculated.
[0063]
Next, the calculated delay time is counted in step S29. After the delay time has elapsed, the flow proceeds to step S24 and step S25, the blower lamp is turned off, the blower is stopped, and the heating operation is stopped.
[0064]
FIG. 12 is an explanatory diagram showing control for preventing a high load, which functions when the temperature of the hot air supplied from the indoor unit 1 to the conditioned room during the heating operation exceeds Ta ° C., and the tapping temperature is It differs depending on whether it is 60 ° C or 80 ° C and the temperature of the tapping water is 90 ° C.
[0065]
When the hot water temperature is 60 ° C. or 80 ° C., the change of the flow rate variable valve 23 is prohibited when the temperature of the hot air is lower than Tb ° C. and higher than Ta ° C., and the flow rate when the temperature of the hot air is higher than Tb ° C. The variable valve 23 is closed every 2 steps. The cycle for closing the flow rate variable valve 23 is every 3 minutes, and this 3 minute cycle is the same as the cycle for calculating the opening degree of the flow rate variable valve 23 in step S1. That is, this correction and regulation are performed on the opening of the variable flow valve 23 newly calculated in step S1.
[0066]
When the temperature of the hot water is 90 ° C, the change of the flow rate variable valve 23 is prohibited when the temperature of the hot air is lower than Tc ° C and higher than Tb ° C. When the temperature of the hot air is higher than Tc ° C, the flow rate variable valve is set to 2 It closes every time.
[0067]
By performing the control as described above, the heating capacity at the time of high load is reduced and the high load state is prevented.
[0068]
In addition, although the temperature of the warm water made high in this example was about 90 ° C., the warm water circulated for heating is water, and the boiling point is 100 ° C. (temperature at which boiling does not occur due to the circulating pressure of the pump), And it was set in consideration of sharing the equipment and parts planned for the conventional hot water of 80 ° C., and the temperature around 90 ° C. was optimum. When this circulating medium is changed to one having a high boiling point other than hot water, an optimum temperature may be set according to the boiling point.
[0069]
【The invention's effect】
As described above in detail, according to the present invention, a large heating capacity can be obtained at the start-up that requires a high heating capacity, and the rise time of the heating operation can be shortened. In particular, by regulating this high temperature hot water supply condition, an abnormal temperature rise of the air conditioner, particularly the indoor unit, can be suppressed and the operation of the air conditioner can be stabilized.
[Brief description of the drawings]
FIG. 1 is a diagram showing an air conditioner of the present invention and a hot water circuit using the same.
FIG. 2 is a sectional view of the indoor unit of the air conditioner of the present invention.
FIG. 3 is a schematic diagram showing an embodiment of a control flow of the present invention.
FIG. 4 is a schematic view of a filter mechanism.
FIG. 5 is a diagram showing a form of a tapping signal.
FIG. 6 is an operation flowchart of the filter mechanism.
FIG. 7 is a block diagram of the indoor unit control device.
FIG. 8 is a block diagram of an outdoor unit control device.
FIG. 9 is a block diagram of a hot water supply source control device.
FIG. 10 is a flowchart of a heating operation using hot water.
FIG. 11 is a flowchart of a heating operation using hot water.
FIG. 12 is an explanatory diagram showing control for preventing a high load.
[Explanation of symbols]
1 Indoor unit
2 outdoor unit
3 Indoor heat exchanger
4 Blowers
20 Hot water circuit
21 Channel of hot water
22 Hot water supply source
23 Flow variable valve
69 Heat source machine control circuit

Claims (5)

Comprising a hot water heat exchanger hot water temperature in a plurality of stages by the control of the blower and the heating amount in the air passage is controlled to circulate, configured to enable the heating operation of the conditioner chamber, room temperature setting temperature of the conditioning chamber And controlling the opening of the flow rate variable valve that adjusts the flow rate of the hot water circulating through the hot water heat exchanger based on the difference between the set temperature and the room temperature, and at the start of heating operation, the room temperature and the set temperature And a control device for outputting a signal for increasing the controlled temperature of the hot water circulating through the hot water heat exchanger to the hot water supply source when the temperature difference of the hot water exceeds a first predetermined value. Air conditioner. When the control device reaches a set time after outputting a signal for raising the temperature of hot water or when the temperature difference between the room temperature and the set temperature becomes equal to or less than a second set value that is smaller than the first set value, The air conditioner according to claim 1, wherein a signal for lowering the temperature of the hot water circulating through the hot water heat exchanger by one stage is output to the hot water supply source. The said control apparatus is provided with the structure which does not perform the operation | movement which outputs the signal which raises the temperature of the warm water which circulates through the said warm water heat exchanger to the warm water supply source at the time of the trial operation of a heating operation. Air conditioner as described in. The control device includes a delay mechanism for delaying the operation stop of the blower when the temperature of the hot water circulating through the hot water heat exchanger is set high when the heating operation is stopped, and the time for the delay is the hot water The air conditioner according to claim 1, wherein the air conditioner is calculated based on a temperature in the vicinity of the heat exchanger . When the supply temperature to the chamber to be conditioned exceeds a predetermined high temperature, the control device is based on the set temperature of the hot water circulating through the hot water heat exchanger, and near the hot water heat exchanger by the flow rate variable valve . The air conditioner according to claim 1, further comprising a correction mechanism that corrects a circulation amount of the hot water so that the temperature does not increase.

Images