WO2012046850A1 - 空気調和機 - Google Patents
空気調和機 Download PDFInfo
- Publication number
- WO2012046850A1 WO2012046850A1 PCT/JP2011/073242 JP2011073242W WO2012046850A1 WO 2012046850 A1 WO2012046850 A1 WO 2012046850A1 JP 2011073242 W JP2011073242 W JP 2011073242W WO 2012046850 A1 WO2012046850 A1 WO 2012046850A1
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- WO
- WIPO (PCT)
- Prior art keywords
- heat exchanger
- heating operation
- indoor
- radiant
- heating
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
Definitions
- the present invention relates to an air conditioner including a heat exchanger, a fan, and a radiation panel.
- an indoor unit of an air conditioner an indoor unit having a heat exchanger and a radiation panel each having a part of piping constituting a refrigerant circuit, and an indoor fan disposed in the vicinity of the heat exchanger is known (for example, Patent Document 1).
- This air conditioner has a fan / panel mode that performs both hot air heating and radiant heating, an automatic mode that automatically switches between hot air heating and radiant heating, and hot air heating.
- One of the panel modes for performing only radiant heating can be set. When only radiant heating is performed and hot air heating is not performed, the operation of the indoor fan is stopped. Further, when only radiant heating is performed, the operation frequency of the compressor is set lower than when both hot air heating and radiant heating are performed.
- an object of the present invention is to provide an air conditioner capable of improving the heating capacity with almost no draft feeling.
- An air conditioner is an air conditioner including an indoor unit and an outdoor unit connected to the indoor unit via a refrigerant circuit, and the indoor unit constitutes the refrigerant circuit.
- a heat exchanger and a radiant panel each having a part of the piping to be heated, and a fan disposed in the vicinity of the heat exchanger, flowing a refrigerant through the heat exchanger to perform hot air heating, and
- the radiant heating operation is performed by flowing the refrigerant to the radiant panel to perform radiant heating
- the hot air heating is performed by flowing the refrigerant to the heat exchanger
- the radiant heating is performed by flowing the refrigerant to the radiant panel.
- the air volume generated by the fan is reduced during the radiant light air heating operation, so that it is possible to perform hot air heating that makes the user feel almost no draft. Moreover, since the amount of heat exchange by the heat exchanger is large because the fan is not stopped, the pressure in the refrigerant circuit can be prevented from becoming too high. Therefore, the rotation speed of the compressor of the outdoor unit can be increased and the heating capacity can be improved as compared with the case where only the radiant heating is performed with the fan stopped.
- An air conditioner according to a second invention is the air conditioner according to the first invention, based on an indoor temperature sensor that detects a temperature of a room in which the indoor unit is installed, and an indoor temperature detected by the indoor temperature sensor, Switching means for switching between the radiant heating operation and the radiant light breeze heating operation is provided.
- this air conditioner it is possible to switch between the radiant heating operation and the radiant breeze heating according to the room temperature so that the radiant heating operation is performed when the room temperature is low and the radiant breeze heating operation is performed when the room temperature is high. it can.
- the room temperature when the room temperature is low, the room temperature can be quickly raised, and when the room temperature becomes high, it is possible to automatically switch to heating with almost no draft feeling.
- An air conditioner relates to the compressor provided in the outdoor unit, the control means for controlling the compressor, and the pressure in the heat exchanger in the first or second invention.
- Storage means storing an upper limit value, and when at least one of the radiant heating operation and the radiant breeze heating operation is performed, the control means is configured to set the pressure in the heat exchanger to the upper limit value.
- the compressor is controlled so as to substantially match the corresponding pressure.
- the compressor is controlled so that the pressure in the refrigerant circuit substantially coincides with the upper limit pressure at the time of radiant heating operation or radiant breeze heating operation, so that the heating capacity can be improved.
- An air conditioner according to a fourth invention is the air conditioner according to the third invention, further comprising a heat exchange temperature sensor provided in the heat exchanger, wherein the storage means is the upper limit value for the pressure in the heat exchanger.
- the upper limit temperature of the heat exchange temperature in the heat exchanger is stored, and when at least one of the radiant heating operation and the radiant light breeze heating operation is performed, the control means is the heat exchange temperature sensor.
- the compressor is controlled so that the detected heat exchange temperature substantially coincides with the upper limit temperature.
- the pressure in the refrigerant circuit is controlled to substantially match the upper limit pressure by controlling the compressor so that the heat exchange temperature detected by the heat exchange temperature sensor substantially matches the upper limit temperature. be able to.
- An air conditioner is an air conditioner including an indoor unit and an outdoor unit connected to the indoor unit via a refrigerant circuit, and the indoor unit constitutes the refrigerant circuit.
- a heat exchanger and a radiant panel each having a part of a pipe to be circulated, and a fan disposed in the vicinity of the heat exchanger, and the refrigerant is supplied to the heat exchanger without flowing the refrigerant through the radiant panel.
- hot air heating operation for flowing hot air and flowing a refrigerant to the heat exchanger to perform hot air heating and flowing a refrigerant to the radiation panel to perform radiant heating, and from the time of the hot air heating operation It is possible to perform a radiant light breeze heating operation in which a radiant light breeze heating with a reduced air volume generated by a fan is possible.
- the air volume generated by the fan is reduced during the radiant light air heating operation, so that it is possible to perform hot air heating that makes the user feel almost no draft. Moreover, since the amount of heat exchange by the heat exchanger is large because the fan is not stopped, the pressure in the refrigerant circuit can be prevented from becoming too high. Therefore, the rotation speed of the compressor of the outdoor unit can be increased and the heating capacity can be improved as compared with the case where only the radiant heating is performed with the fan stopped.
- the air conditioner according to a sixth aspect of the present invention is the air conditioner according to the fifth aspect, wherein an upper limit value for the pressure in the compressor provided in the outdoor unit, the control means for controlling the compressor, and the pressure in the heat exchanger is Stored in the storage means, and when the radiant breeze heating operation is performed, the control means compresses the pressure so that the pressure in the heat exchanger substantially matches the pressure corresponding to the upper limit value. It is characterized by controlling the machine.
- the heating capacity can be improved because the compressor is controlled so that the pressure in the refrigerant circuit substantially coincides with the upper limit pressure during the radiation breeze heating operation.
- An air conditioner according to a seventh aspect of the present invention is the air conditioner according to the sixth aspect, further comprising a heat exchange temperature sensor provided in the heat exchanger, wherein the storage means is the upper limit value for the pressure in the heat exchanger.
- the upper limit temperature of the heat exchange temperature in the heat exchanger is stored, and when the radiant breeze heating operation is performed, the control means detects the heat exchange temperature detected by the heat exchange temperature sensor.
- the compressor is controlled so as to substantially coincide with an upper limit temperature.
- the pressure in the refrigerant circuit is controlled to substantially match the upper limit pressure by controlling the compressor so that the heat exchange temperature detected by the heat exchange temperature sensor substantially matches the upper limit temperature. be able to.
- An air conditioner according to an eighth aspect of the present invention is the air conditioner according to any one of the first to seventh aspects, further comprising a valve mechanism that adjusts an amount of refrigerant supplied to the radiation panel, wherein the radiation circuit includes: The valve mechanism and the heat exchanger are provided in parallel.
- the radiation panel and the valve mechanism are provided in parallel with the heat exchanger, only the warm air heating operation without flowing the refrigerant to the radiation panel and the radiation heating operation for flowing the refrigerant to the radiation panel are performed.
- the operation can be switched between the radiant breeze heating operation only by opening and closing the valve mechanism.
- the air volume generated by the fan is reduced, so that it is possible to perform hot air heating that makes the user feel almost no draft.
- the pressure in the refrigerant circuit can be prevented from becoming too high. Therefore, the rotation speed of the compressor of the outdoor unit can be increased and the heating capacity can be improved as compared with the case where only the radiant heating is performed with the fan stopped.
- the radiant heating operation and the radiant breeze heating can be switched according to the room temperature so that the radiant heating operation is performed when the room temperature is low and the radiant breeze heating operation is performed when the room temperature is high. it can.
- the room temperature when the room temperature is low, the room temperature can be quickly raised, and when the room temperature becomes high, it is possible to automatically switch to heating with almost no draft feeling.
- the heating capacity can be improved because the compressor is controlled so that the pressure in the refrigerant circuit substantially coincides with the upper limit pressure during the radiant heating operation or during the radiant breeze heating operation. .
- the radiant panel and the valve mechanism are provided in parallel with the heat exchanger, an operation in which only the hot air heating is performed without flowing the refrigerant through the radiant panel, and a radiant heating operation in which the refrigerant flows through the radiant panel are performed.
- the operation can be switched between the radiant breeze heating operation only by opening and closing the valve mechanism.
- the air conditioner 1 of this embodiment includes an indoor unit 2 installed indoors, an outdoor unit 3 installed outdoor, and a remote controller 4 (see FIG. 3). ing.
- the indoor unit 2 detects an indoor heat exchanger 20, an indoor fan 21 disposed in the vicinity of the indoor heat exchanger 20, a radiation panel 22, an indoor electric valve (valve mechanism) 23, and an indoor air temperature.
- the indoor temperature sensor 24 is provided.
- the outdoor unit 3 includes a compressor 30, a four-way switching valve 31, an outdoor heat exchanger 32, an outdoor fan 33 disposed in the vicinity of the outdoor heat exchanger 32, and an outdoor electric valve 34. Yes.
- the indoor heat exchanger 20, the compressor 30, the four-way switching valve 31, the outdoor heat exchanger 32, and the outdoor electric valve 34 are connected to form an annular refrigerant circuit 10.
- the pipes on both sides of the indoor heat exchanger 20 are connected by the bypass pipe 11.
- the bypass pipe 11 is provided with a radiation panel 22 and an indoor motor operated valve 23.
- a panel entry temperature sensor 25 and a panel exit temperature sensor 26 are attached to both sides of the radiation panel 22 in the bypass pipe 11.
- an accumulator 35 is interposed between the suction side of the compressor 30 and the four-way switching valve 31 in the refrigerant circuit 10, and the discharge side of the compressor 30 and the four-way switching valve 31 in the refrigerant circuit 10 are interposed.
- a discharge temperature sensor 36 is attached between them.
- An outdoor heat exchanger temperature sensor 28 is attached to the outdoor heat exchanger 32.
- the indoor heat exchanger 20 has a pipe constituting a part of the refrigerant circuit, and an indoor heat exchange temperature sensor 27 is attached.
- the indoor heat exchanger 20 is disposed on the windward side of the indoor fan 21. The air heated or cooled by heat exchange with the indoor heat exchanger 20 is blown into the room as warm air or cold air by the indoor fan 21, whereby hot air heating or cooling is performed.
- the radiation panel 22 is disposed on the surface side of the indoor unit 2 and has a pipe that constitutes a part of the refrigerant circuit. Radiant heating is performed by radiating the heat of the refrigerant flowing through the pipe into the room.
- the indoor motor operated valve 23 is provided to adjust the flow rate of the refrigerant supplied to the radiation panel 22.
- the air conditioner 1 of the present embodiment can perform a cooling operation, a warm air heating operation, a radiant heating operation, and a radiant light wind heating operation.
- the cooling operation is an operation in which the refrigerant is allowed to flow through the indoor heat exchanger 20 without flowing the refrigerant through the radiant panel 22, and the hot air heating operation is the indoor heat exchanger without flowing the refrigerant through the radiant panel 22.
- 20 is an operation in which a refrigerant is passed through to perform hot air heating.
- the radiant heating operation is an operation in which the refrigerant is passed through the indoor heat exchanger 20 to perform hot air heating, and the refrigerant is passed through the radiant panel 22 to perform radiant heating.
- the radiant breeze heating operation is an operation in which the warm air heating is performed with a lower air volume than in the warm air heating operation and the radiant heating operation, and the refrigerant is passed through the radiant panel 22 to perform the radiant heating.
- the indoor motor-operated valve 23 is closed and the four-way switching valve 31 is switched to the state shown by the solid line in FIG. Therefore, as indicated by the solid arrow in FIG. 1, the high-temperature and high-pressure refrigerant discharged from the compressor 30 flows into the indoor heat exchanger 20 through the four-way switching valve 31.
- the refrigerant condensed in the indoor heat exchanger 20 is decompressed by the outdoor motor operated valve 34 and then flows into the outdoor heat exchanger 32.
- the refrigerant evaporated in the outdoor heat exchanger 32 flows into the compressor 30 via the four-way switching valve 31 and the accumulator 35.
- the indoor motor-operated valve 23 is opened, and the four-way switching valve 31 is switched to the state indicated by the solid line in FIG. Therefore, as indicated by the solid arrows in FIG. 2, the high-temperature and high-pressure refrigerant discharged from the compressor 30 flows into the indoor heat exchanger 20 and the radiation panel 22 through the four-way switching valve 31. Then, the refrigerant condensed in the indoor heat exchanger 20 and the radiation panel 22 is decompressed by the outdoor motor operated valve 34 and then flows into the outdoor heat exchanger 32. The refrigerant evaporated in the outdoor heat exchanger 32 flows into the compressor 30 via the four-way switching valve 31 and the accumulator 35.
- ⁇ Remote control 4> In the remote controller 4, the user performs operation start / stop operation, operation mode setting, indoor temperature target temperature setting (indoor set temperature), blowing air volume setting, and the like. As shown in Table 1, in the air conditioner 1 of the present embodiment, either the cooling operation mode or the heating operation mode can be selected as the main operation mode by operating the remote controller 4.
- the heating operation mode is selected as the main operation mode, as shown in Table 1, one of the warm air heating operation mode and the radiation 1 operation mode and the radiation 2 operation mode included in the radiant heating operation mode can be selected. It is like that.
- the cooling operation mode is a mode for performing cooling operation
- the warm air heating operation mode is a mode for performing warm air heating operation
- the radiation 1 operation mode is determined according to the room temperature.
- the radiant 2 operation mode is a mode for performing a radiant breeze heating operation.
- any of “air volume automatic”, “strong”, and “weak” can be selected as the air volume setting.
- the air volume is automatically controlled when the radiation 1 operation mode or the radiation 2 operation mode is selected.
- control unit 5 includes a storage unit (storage unit) 50, an operation mode control unit (switching unit) 51, an indoor motorized valve control unit 52, an indoor fan control unit 53, and a compressor control. Unit (control means) 54 and outdoor electric valve control unit 55.
- the storage unit 50 stores various operation settings related to the air conditioner 1, control programs, data tables necessary for executing the control programs, and the like.
- the operation settings include those set by operating the remote controller 4 by the user, such as a target temperature of the room temperature (room set temperature), and those set in advance for the air conditioner 1. .
- the target temperature range of the radiation panel 22 is set in advance to a predetermined temperature range (for example, 50 to 55 ° C.). Note that the target temperature range of the radiation panel 22 may be set by operating the remote controller 4.
- the storage unit 50 stores an upper limit temperature of the heat exchange temperature in the indoor heat exchanger 20 corresponding to the upper limit pressure in the indoor heat exchanger 20.
- the operation mode control unit 51 starts the cooling operation, the heating operation, or the radiant light wind heating operation when the operation of starting the cooling operation mode, the warm air heating operation mode, or the radiation 2 operation mode is performed by the remote controller 4. .
- the operation mode control unit 51 starts the radiant heating operation when the indoor temperature detected by the indoor temperature sensor 24 is lower than the indoor set temperature.
- the radiant light wind heating operation is started.
- the heating operation is not started when the room temperature is higher than the indoor set temperature by a predetermined temperature Tb or more.
- the operation mode control unit 51 radiates from the radiant heating operation when the room temperature detected by the room temperature sensor 24 becomes equal to or higher than the indoor set temperature during the radiant heating operation during the radiant one operation mode operation.
- the radiant breeze heating operation is switched to the radiant heating operation.
- the operation mode control unit 51 automatically stops the operation (thermo-off) when the room temperature becomes higher than the indoor set temperature by a predetermined temperature Tb or more during the heating operation, and then the room temperature. When the temperature drops to the indoor set temperature, the operation is started again (thermo-on).
- the indoor motorized valve control unit 52 controls the opening degree of the indoor motorized valve 23. As shown in Table 2, the indoor motor-operated valve control unit 52 closes the indoor motor-operated valve 23 during the cooling operation or the hot air heating operation. Table 2 shows control states of the indoor motor operated valve 23, the indoor fan 21, and the compressor 30 during each operation.
- the indoor motor-operated valve control unit 52 controls the opening degree of the indoor motor-operated valve 23 based on the temperature of the radiation panel 22 during the radiation heating operation or the radiation breeze heating operation. Specifically, the surface temperature (predicted value) of the radiation panel 22 is calculated based on the average value of the temperatures detected by the panel entry temperature sensor 25 and the panel exit temperature sensor 26, and the surface temperature of the radiation panel 22 is calculated. Of the indoor motor-operated valve 23 is controlled so that the predicted value (hereinafter simply referred to as the radiant panel temperature) falls within the panel target temperature range (for example, 50 to 55 ° C.).
- the predicted value hereinafter simply referred to as the radiant panel temperature
- the indoor motor-operated valve control unit 52 controls the opening of the indoor motor-operated valve 23 so that the flow rate of the refrigerant supplied to the radiant panel 22 increases. However, the indoor motor-operated valve control unit 52 controls the indoor motor-operated valve 23 to the initial opening until the predetermined time t1 has elapsed from the start of the operation (when the operation is started by operating the remote controller 4 or when the operation is started by thermo-on). .
- both the detected temperature of the panel input temperature sensor 25 and the panel output temperature sensor 26 are used, but only the detected temperature of the panel input temperature sensor 25 is used. Alternatively, only the temperature detected by the panel temperature sensor 26 may be used.
- the indoor fan control unit 53 controls the rotational speed of the indoor fan 21.
- Table 3 shows the fan taps selected during the automatic air volume operation, the radiant heating operation, and the radiant light air heating operation of the hot air heating operation, and the rotation speeds corresponding to the fan taps.
- the indoor fan control unit 53 selects one of the five stages of fan taps A1 to A5 shown in Table 3 based on the indoor temperature, the indoor set temperature, etc. detected by the indoor temperature sensor 24. And the indoor fan 21 is controlled to the number of rotations (a1 to a5) corresponding to this fan tap. Further, in the warm air heating operation, when “strong” or “weak” is set as the air volume setting, a preset fan tap is determined respectively.
- the indoor fan control unit 53 selects one of a plurality of preset fan taps based on the indoor temperature, the indoor set temperature, or the like detected by the indoor temperature sensor 24. And the indoor fan 21 is controlled to the rotation speed corresponding to this fan tap. Further, in the cooling operation, when “strong” or “weak” is set as the air volume setting, a preset fan tap is determined respectively.
- the indoor fan control unit 53 selects one of the seven stages of fan taps B1 to B7 shown in Table 3 based on the indoor temperature detected by the indoor temperature sensor 24, the indoor set temperature, or the like. Then, the indoor fan 21 is controlled to the rotational speed (b1 to b7) corresponding to the fan tap.
- the indoor fan control unit 53 controls the indoor fan 21 at the rotation speed c1 corresponding to the fan tap C1 shown in Table 3.
- the rotational speed c1 is smaller than any of the rotational speeds a1 to a5 during the hot air heating operation and the rotational speeds b1 to b7 during the radiant heating operation.
- the rotation speed c1 is a value at which almost no sound is generated due to the rotation of the indoor fan 21 and the draft feeling is hardly felt.
- the compressor control unit 54 controls the operating frequency of the compressor 30. During the hot air heating operation and the cooling operation, the frequency of the compressor 30 is controlled based on the room temperature, the indoor set temperature, and the like. Specifically, the compressor control unit 54 controls the compressor 30 such that the frequency of the compressor 30 increases as the difference between the indoor temperature and the indoor set temperature increases.
- the compressor control unit 54 causes the heat exchange temperature detected by the indoor heat exchange temperature sensor 27 to substantially coincide with the upper limit temperature corresponding to the upper limit pressure in the refrigerant circuit.
- the compressor 30 is controlled as described above (this control is referred to as upper limit control). Specifically, the frequency of the compressor 30 is controlled by the control based on the indoor temperature and the indoor set temperature so that the heat exchange temperature detected by the indoor heat exchange temperature sensor 27 exceeds the upper limit temperature. Also, the heat exchange temperature is controlled so as to become a value near the upper limit temperature without exceeding the upper limit temperature.
- the outdoor electric valve control unit 55 controls the opening degree of the outdoor electric valve 34 based on the indoor temperature, the indoor set temperature, and the like.
- the indoor fan control unit 53 causes the indoor fan 21 to be fan-tapped according to the indoor temperature.
- the rotational speed is controlled to correspond to any one of A1 to A5.
- the compressor control unit 54 controls the compressor 30 such that the operating frequency increases as the difference between the room temperature and the room set temperature increases.
- the indoor motor operated valve 23 is closed.
- the indoor motor-operated valve 23 and the compressor 30 are set to “automatic air volume”.
- the indoor fan 21 is controlled by the indoor fan control unit 53 to a rotational speed corresponding to a predetermined fan tap.
- the radiation heating operation is started when the indoor temperature at the start of the operation is lower than the indoor set temperature.
- the indoor fan control unit 53 controls the indoor fan 21 to a rotational speed corresponding to any of the fan taps B1 to B7 according to the indoor temperature and the indoor set temperature.
- the compressor control unit 54 controls the compressor 30 so that the heat exchange temperature detected by the indoor heat exchange temperature sensor 27 substantially coincides with the upper limit temperature (upper limit control is performed).
- the indoor motor-operated valve control unit 52 controls the indoor motor-operated valve 23 to the initial opening until a predetermined time t1 has elapsed from the start of operation, and when the predetermined time t1 has elapsed from the start of operation, the radiant panel temperature changes to the panel.
- the opening degree is controlled to be within the target temperature range. In FIG. 4, the initial opening degree of the indoor motor operated valve 23 is smaller than the fully open position, but the initial opening degree may be fully opened.
- the radiant heating operation is switched to the radiant light breeze heating operation.
- the indoor fan control part 53 controls the indoor fan 21 to the rotation speed c1 corresponding to the fan tap C1.
- the indoor motor-operated valve control unit 52 and the compressor control unit 54 control the indoor motor-operated valve 23 and the compressor 30 in the same manner as before switching to the radiant light wind heating.
- the operation is automatically stopped (thermo-off). Thereby, the indoor fan 21 and the compressor 30 are stopped, and the indoor motor-operated valve 23 is switched to the fully closed state. Thereafter, when the room temperature decreases to the indoor set temperature, the operation is started again (thermo-on).
- the indoor temperature when the thermo is on is equal to or higher than the indoor set temperature, the radiant breeze heating operation is started, and the indoor motor-operated valve 23, the indoor fan 21, and the compressor 30 are controlled as before the thermo-off.
- the radiant light wind heating operation is switched to the radiant heating operation.
- the fan 21 and the compressor 30 are controlled.
- the indoor fan control unit 53 controls the indoor fan 21 to the rotational speed c1 corresponding to the fan tap C1. Further, the compressor control unit 54 controls the compressor 30 so that the heat exchange temperature detected by the indoor heat exchange temperature sensor 27 substantially coincides with the upper limit temperature (upper limit control is performed). Further, the indoor motor-operated valve control unit 52 controls the indoor motor-operated valve 23 to the initial opening until a predetermined time t1 has elapsed from the start of operation, and when the predetermined time t1 has elapsed from the start of operation, the radiant panel temperature changes to the panel. The opening degree is controlled to be within the target temperature range.
- the four-way switching valve 31 is switched to the state shown with the broken line in FIG.1 and FIG.2, and heating operation is carried out.
- defrost operation defrost operation
- the indoor motor operated valve 23 is closed.
- control of the indoor motor operated valve 23 during the defrosting operation is not limited to this, and the indoor motor operated valve 23 is maintained at a predetermined opening degree until the radiation panel temperature reaches a predetermined temperature.
- the indoor motor-operated valve 23 may be switched to a closed state.
- the temperature of the radiation panel 22 decreases to some extent, but the high-temperature refrigerant in the radiation panel 22 can be used for defrosting the outdoor heat exchanger 32.
- the frost adhering to the outdoor heat exchanger 32 can be removed more quickly than in the case described above. Moreover, it can prevent that frost adheres to the radiation panel 22 during a defrost operation.
- the amount of air generated by the indoor fan 21 is reduced during the radiant light air heating operation, so that it is possible to perform hot air heating that makes the user feel almost no draft. It is. Moreover, since the amount of heat exchange by the indoor heat exchanger 20 is large because the indoor fan 21 is not stopped, it is possible to prevent the pressure in the refrigerant circuit from becoming too high. Therefore, the rotation speed of the compressor 30 of the outdoor unit 3 can be increased and the heating capacity can be improved as compared with the case where only the radiant heating is performed with the indoor fan 21 stopped.
- the radiant heating operation and the radiant breeze heating are performed according to the room temperature so that the radiant heating operation is performed when the room temperature is low and the radiant breeze heating operation is performed when the room temperature is high. Is switched. As a result, when the room temperature is low, the room temperature can be quickly raised, and when the room temperature becomes high, it is possible to automatically switch to heating with almost no draft feeling.
- the radiation heating operation is performed, and when the room temperature is equal to or higher than the indoor set temperature, the operation is switched to the radiation breeze heating operation. . Therefore, the room temperature can be quickly raised to the room set temperature.
- the radiant light wind heating operation is switched to the radiant heating operation.
- the switching of the operation can be reduced and the radiant breeze heating operation can be continued rather than switching from the radiant breeze heating operation to the radiant heating operation.
- the compressor 30 is controlled so that the pressure in the refrigerant circuit substantially coincides with the upper limit pressure during the radiant heating operation or the radiant breeze heating operation, so that the heating capacity is improved. Can do.
- the pressure in the refrigerant circuit substantially matches the upper limit pressure by controlling the compressor 30 so that the heat exchange temperature detected by the indoor heat exchange temperature sensor 27 substantially matches the upper limit temperature. Can be controlled.
- the radiant panel 22 and the indoor motor-operated valve 23 are provided in parallel with the indoor heat exchanger 20, so that hot air that performs only hot air heating without flowing refrigerant through the radiant panel 22. It is possible to switch between the heating operation and the radiant heating operation in which the refrigerant flows through the radiant panel 22 or the radiant breeze heating operation simply by opening and closing the indoor motor-operated valve 23.
- the number of fan taps (B1 to B7) during the radiant heating operation is larger than the number of fan taps (A1 to A5) during the hot air heating operation. That is, during the radiant heating operation, the rotational speed of the indoor fan 21 changes more finely than during the hot air heating operation. By finely changing the rotation speed of the indoor fan 21 during the radiant heating operation, it is possible to reduce the sound accompanying the rotation of the indoor fan 21 when switching from the radiant heating operation to the radiant light wind heating operation.
- the radiant breeze heating operation when the room temperature is lower than the indoor set temperature by a predetermined temperature Tb or more during the radiant light breeze heating operation in the radiation 1 operation mode, the radiant breeze heating operation is switched to the radiant heating operation.
- the radiant breeze heating operation may be switched to the radiant heating operation.
- the rotation speed of the indoor fan 21 at the time of radiation breeze heating operation is maintained by the rotation speed c1 set beforehand, if it is rotation speed smaller than the rotation speed of the indoor fan 21 at the time of radiation heating operation , May vary.
- the heating operation includes a warm air heating operation, a radiant heating operation, and a radiant light wind heating operation, and the indoor air volume during the radiant light wind heating operation is the same as that during the warm air heating operation and during the radiant heating operation.
- the heating operation includes a radiant heating operation and a radiant breeze heating operation, and the indoor air volume during the radiant breeze heating operation may be smaller than the indoor air volume during the radiant heating operation.
- the operation mode not only the radiation 1 operation mode and the radiation 2 heating operation mode but also other operation modes can be selected. In this case, the other operation modes may not be selected. Therefore, for example, a cooling operation mode or a warm air heating operation mode may not be selected as the operation mode.
- the heating operation there are a warm air heating operation and a radiant light wind heating operation
- the indoor air volume during the radiant light wind heating operation may be smaller than the indoor air volume during the warm air heating operation.
- the warm air heating operation mode and the radiation 2 operation mode but also other operation modes can be selected as the operation mode, but in this case, other operation modes may not be selected. Therefore, for example, the cooling operation mode or the radiation 1 operation mode may not be selected as the operation mode.
- the heating capacity can be improved with almost no draft feeling.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
- Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
Abstract
Description
また、温風暖房と輻射暖房の両方を行うと、圧縮機の運転周波数を上げることができ、これらの問題は解決するものの、通常の温風暖房ではドラフト感を与えるため、ドラフト感のない暖房を求めるユーザーの要望に答えることができなかった。
図1および図2に示すように、本実施形態の空気調和機1は、室内に設置される室内機2と、室外に設置される室外機3と、リモコン4(図3参照)とを備えている。室内機2は、室内熱交換器20と、室内熱交換器20の近傍に配置された室内ファン21と、輻射パネル22と、室内電動弁(弁機構)23と、室内の気温を検出するための室内温度センサ24とを備えている。また、室外機3は、圧縮機30と、四路切換弁31と、室外熱交換器32と、室外熱交換器32の近傍に配置された室外ファン33と、室外電動弁34とを備えている。
このバイパス配管11には、輻射パネル22と室内電動弁23が設けられている。バイパス配管11における輻射パネル22の両側には、パネル入温度センサ25と、パネル出温度センサ26が付設されている。また、冷媒回路10における圧縮機30の吸入側と四路切換弁31との間にはアキュムレータ35が介設されており、冷媒回路10における圧縮機30の吐出側と四路切換弁31との間には、吐出温度センサ36が付設されている。また、室外熱交換器32には、室外熱交温度センサ28が付設されている。
冷房運転時には、室内電動弁23が閉弁されると共に、四路切換弁31が図1中破線で示す状態に切り換えられる。そのため、図1中破線の矢印で示すように、圧縮機30から吐出された高温高圧冷媒は、四路切換弁31を通って、室外熱交換器32に流入する。そして、室外熱交換器32において凝縮した冷媒は、室外電動弁34で減圧された後、室内熱交換器20に流入する。そして、室内熱交換器20において蒸発した冷媒は、四路切換弁31およびアキュムレータ35を介して、圧縮機30に流入する。
リモコン4では、ユーザによって、運転の開始/停止の操作、運転モードの設定、室内温度の目標温度(室内設定温度)の設定、吹出風量の設定などが行われる。表1に示すように、本実施形態の空気調和機1では、リモコン4の操作により、主運転モードとして、冷房運転モード及び暖房運転モードのいずれかを選択できるようになっている。
次に、空気調和機1を制御する制御部5について図3を参照しつつ説明する。
図3に示すように、制御部5は、記憶部(記憶手段)50と、運転モード制御部(切り換え手段)51と、室内電動弁制御部52と、室内ファン制御部53と、圧縮機制御部(制御手段)54と、室外電動弁制御部55とを有している。
記憶部50には、空気調和機1に関する種々の運転設定や、制御プログラムや、その制御プログラムの実行に必要なデータテーブルなどが記憶されている。運転設定には、室内温度の目標温度(室内設定温度)のように、ユーザによってリモコン4が操作されることで設定されるものと、空気調和機1に対して予め設定されたものとがある。本実施形態の空気調和機1では、輻射パネル22の目標温度範囲は、予め所定の温度範囲(例えば50~55℃)に設定されている。なお、リモコン4の操作によって輻射パネル22の目標温度範囲を設定できるようになっていてもよい。また、記憶部50には、室内熱交換器20での上限圧力に対応する室内熱交換器20における熱交温度の上限温度が記憶されている。
運転モード制御部51は、リモコン4により、冷房運転モード、温風暖房運転モード、または輻射2運転モードの運転開始の操作が行われると、冷房運転、暖房運転、または輻射微風暖房運転を開始する。
また、運転モード制御部51は、リモコン4により、輻射1運転モード運転開始の操作が行われると、室内温度センサ24で検出された室内温度が室内設定温度未満の場合に、輻射暖房運転を開始すると共に、室内温度が室内設定温度以上の場合に、輻射微風暖房運転を開始する。
なお、本実施形態の空気調和機1では、リモコン4の操作によって運転が開始される場合に、室内温度が室内設定温度よりも所定温度Tb以上高い場合には、暖房運転が開始されない。
また、運転モード制御部51は、暖房運転を行っている際、室内温度が室内設定温度よりも所定温度Tb以上高くなった場合に、自動的に運転を停止し(サーモオフ)、その後、室内温度が室内設定温度まで低下した場合に、再び運転を開始する(サーモオン)。
室内電動弁制御部52は、室内電動弁23の開度を制御する。表2に示すように、冷房運転時または温風暖房運転時には、室内電動弁制御部52は、室内電動弁23を閉弁する。なお、表2は、各運転時における室内電動弁23、室内ファン21、および圧縮機30の制御状態を示している。
室内ファン制御部53は、室内ファン21の回転数を制御する。温風暖房運転の風量自動運転時、輻射暖房運転時、および輻射微風暖房運転時にそれぞれ選択されるファンタップと、各ファンタップに対応する回転数を表3に示す。
圧縮機制御部54は、圧縮機30の運転周波数を制御する。
温風暖房運転時および冷房運転時には、室内温度や室内設定温度等に基づいて、圧縮機30の周波数を制御する。具体的には、室内温度と室内設定温度との差が大きいほど、圧縮機制御部54は、圧縮機30の周波数が増加するように圧縮機30を制御する。
室外電動弁制御部55は、室内温度や室内設定温度等に基づいて、室外電動弁34の開度を制御する。
次に、空気調和機1の各暖房運転モードの動作について説明する。輻射1運転モードおよび輻射2運転モードについては、図4および図5のグラフを参照しつつ説明する。図4および図5のグラフは、横軸が時間を示し、縦軸が、室内温度、室内ファン21の回転数、圧縮機30の運転周波数、輻射パネル温度、および室内電動弁23の開度をそれぞれ示している。
リモコン4により温風暖房運転モード運転開始の操作が行われると共に、風量設定として「風量自動」が選択されると、室内ファン制御部53により、室内ファン21は、室内温度に応じて、ファンタップA1~A5のいずれかに対応する回転数に制御される。また、圧縮機制御部54により、圧縮機30は、室内温度と室内設定温度との差が大きいほど、運転周波数が増加するように制御される。また、室内電動弁23は閉弁される。
図4に示すように、リモコン4により輻射1運転モード運転開始の操作が行われると、運転開始の室内温度が室内設定温度未満の場合、輻射暖房運転が開始される。この場合、室内ファン制御部53によって、室内ファン21は、室内温度と室内設定温度に応じて、ファンタップB1~B7のいずれかに対応する回転数に制御される。また、圧縮機制御部54によって、圧縮機30は、室内熱交温度センサ27で検出される熱交温度が上限温度とほぼ一致するように制御される(上限制御される)。また、室内電動弁制御部52によって、室内電動弁23は、運転開始から所定時間t1が経過するまでは、初期開度に制御され、運転開始から所定時間t1が経過すると、輻射パネル温度がパネル目標温度範囲内となるように開度が制御される。なお、図4では、室内電動弁23の初期開度は、全開よりも小さい開度となっているが、初期開度は全開であってもよい。
図5に示すように、リモコン4により輻射2運転モード運転開始の操作が行われると、輻射微風暖房運転が開始される。室内ファン制御部53によって、室内ファン21は、ファンタップC1に対応する回転数c1に制御される。また、圧縮機制御部54によって、圧縮機30は、室内熱交温度センサ27で検出される熱交温度が上限温度とほぼ一致するように制御される(上限制御される)。また、室内電動弁制御部52によって、室内電動弁23は、運転開始から所定時間t1が経過するまでは、初期開度に制御され、運転開始から所定時間t1が経過すると、輻射パネル温度がパネル目標温度範囲内となるように開度が制御される。
また、空気調和機1では、暖房運転モード運転時に室外熱交換器32に付着した霜を取り除くために、四路切換弁31を図1および図2中破線で表示した状態に切り換えて、暖房運転から除霜運転(デフロスト運転)に切り換える。本実施形態の空気調和機1では、除霜運転を行う場合に、室内電動弁23を閉弁する。これにより、輻射パネル22に低温の冷媒が流れないため、輻射パネル22の温度低下を抑制することができる。そのため、再び暖房運転を開始したときに、輻射パネル22の温度を迅速にパネル目標温度範囲内とすることができる。
以上説明した本実施形態の空気調和機1によると、輻射微風暖房運転時には、室内ファン21によって発生する風量を小さくしているため、ユーザーにドラフト感をほとんど感じさせない温風暖房を行うことが可能である。また、室内ファン21を停止させていないことで室内熱交換器20による熱交換量が大きいため、冷媒回路内の圧力が高くなり過ぎるのを防止できる。そのため、室内ファン21を停止させて輻射暖房のみを行う場合よりも、室外機3の圧縮機30の回転数を増大させることができ、暖房能力を向上させることができる。
したがって、暖房運転として、輻射暖房運転及び輻射微風暖房運転があって、輻射微風暖房運転時での室内風量が、輻射暖房運転時の室内風量より小さい構成であればよい。上記実施形態では、運転モードとして、輻射1運転モード及び輻射2暖房運転モードだけでなく、他の運転モードを選択可能であるが、この場合、他の運転モードは選択できなくてもよい。従って、運転モードとして、例えば、冷房運転モードや、温風暖房運転モードが選択できなくてもよい。
2 室内機
3 室外機
4 リモコン
20 室内熱交換器(熱交換器)
21 室内ファン(ファン)
22 輻射パネル
23 室内電動弁(弁機構)
24 室内温度センサ
27 室内熱交温度センサ(熱交温度センサ)
30 圧縮機
50 記憶部(記憶手段)
51 運転モード制御部(切り換え手段)
52 室内電動弁制御部
53 室内ファン制御部
54 圧縮機制御部(制御手段)
Claims (8)
- 室内機と、前記室内機と冷媒回路を介して接続された室外機とを備えた空気調和機であって、
前記室内機が、前記冷媒回路を構成する配管の一部をそれぞれ有する熱交換器及び輻射パネルと、前記熱交換器の近傍に配置されたファンとを有しており、
前記熱交換器に冷媒を流して温風暖房を行い且つ前記輻射パネルに冷媒を流して輻射暖房を行う輻射暖房運転と、
前記熱交換器に冷媒を流して温風暖房を行い且つ前記輻射パネルに冷媒を流して輻射暖房を行うと共に、前記輻射暖房運転時より前記ファンによって発生する風量を小さくした輻射微風暖房を行う輻射微風暖房運転とが可能であることを特徴とする空気調和機。 - 前記室内機が設置された室内の温度を検出する室内温度センサと、
前記室内温度センサで検出された室内温度に基づいて、前記輻射暖房運転と前記輻射微風暖房運転とを切り換える切り換え手段を備えていることを特徴とする請求項1に記載の空気調和機。 - 前記室外機に設けられた圧縮機と、
前記圧縮機を制御する制御手段と、
前記熱交換器での圧力についての上限値が記憶された記憶手段とを備え、
前記輻射暖房運転及び前記輻射微風暖房運転の少なくとも一方が行われている場合に、
前記制御手段が、前記熱交換器での圧力が前記上限値に対応する圧力とほぼ一致するように前記圧縮機を制御することを特徴とする請求項1または2に記載の空気調和機。 - 前記熱交換器に設けられた熱交温度センサを備え、
前記記憶手段が、前記熱交換器での圧力についての前記上限値として、前記熱交換器における熱交温度の上限温度を記憶しており、
前記輻射暖房運転及び前記輻射微風暖房運転の少なくとも一方が行われている場合に、
前記制御手段が、前記熱交温度センサで検出された熱交温度が前記上限温度とほぼ一致するように前記圧縮機を制御することを特徴とする請求項3に記載の空気調和機。 - 室内機と、前記室内機と冷媒回路を介して接続された室外機とを備えた空気調和機であって、
前記室内機が、前記冷媒回路を構成する配管の一部をそれぞれ有する熱交換器及び輻射パネルと、前記熱交換器の近傍に配置されたファンとを有しており、
前記輻射パネルに冷媒を流さないで前記熱交換器に冷媒を流して温風暖房を行う温風暖房運転と、
前記熱交換器に冷媒を流して温風暖房を行い且つ前記輻射パネルに冷媒を流して輻射暖房を行うと共に、前記温風暖房運転時より前記ファンによって発生する風量を小さくした輻射微風暖房を行う輻射微風暖房運転とが可能であることを特徴とする空気調和機。 - 前記室外機に設けられた圧縮機と、
前記圧縮機を制御する制御手段と、
前記熱交換器での圧力についての上限値が記憶された記憶手段とを備え、
前記輻射微風暖房運転が行われている場合に、
前記制御手段が、前記熱交換器での圧力が前記上限値に対応する圧力とほぼ一致するように前記圧縮機を制御することを特徴とする請求項5に記載の空気調和機。 - 前記熱交換器に設けられた熱交温度センサを備え、
前記記憶手段が、前記熱交換器での圧力についての前記上限値として、前記熱交換器における熱交温度の上限温度を記憶しており、
前記輻射微風暖房運転が行われている場合に、
前記制御手段が、前記熱交温度センサで検出された熱交温度が前記上限温度とほぼ一致するように前記圧縮機を制御することを特徴とする請求項6に記載の空気調和機。 - 前記輻射パネルに供給される冷媒の量を調整する弁機構を備え、
前記冷媒回路において、前記輻射パネル及び前記弁機構と、前記熱交換器とが並列に設けられていることを特徴とする請求項1~7のいずれかに記載の空気調和機。
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JPH0755234A (ja) * | 1993-08-16 | 1995-03-03 | Toshiba Corp | 空気調和装置 |
JPH07294029A (ja) * | 1994-04-28 | 1995-11-10 | Toshiba Corp | 空気調和機の制御方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS63135742A (ja) * | 1986-11-27 | 1988-06-08 | Toshiba Corp | 空気調和機 |
JPH0448140A (ja) * | 1990-06-18 | 1992-02-18 | Toshiba Corp | 空気調和機 |
JP2686371B2 (ja) * | 1991-01-19 | 1997-12-08 | シャープ株式会社 | 空気調和機 |
JP2807934B2 (ja) * | 1991-09-20 | 1998-10-08 | シャープ株式会社 | 空気調和機 |
JPH05280762A (ja) * | 1992-03-30 | 1993-10-26 | Toshiba Corp | 輻射パネル付室内ユニット |
JP5229031B2 (ja) * | 2009-03-18 | 2013-07-03 | ダイキン工業株式会社 | 空調機 |
JP2010216766A (ja) * | 2009-03-18 | 2010-09-30 | Daikin Ind Ltd | 空調機 |
-
2010
- 2010-10-08 JP JP2010228647A patent/JP2012083011A/ja active Pending
-
2011
- 2011-10-07 CN CN201180048623.0A patent/CN103154621B/zh not_active Expired - Fee Related
- 2011-10-07 AU AU2011313172A patent/AU2011313172B2/en not_active Ceased
- 2011-10-07 EP EP11830781.8A patent/EP2631550A4/en not_active Withdrawn
- 2011-10-07 WO PCT/JP2011/073242 patent/WO2012046850A1/ja active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0188252U (ja) * | 1987-11-27 | 1989-06-12 | ||
JPH02259348A (ja) * | 1988-12-26 | 1990-10-22 | Toshiba Audio Video Eng Corp | 空気調和装置 |
JPH0611174A (ja) * | 1992-06-26 | 1994-01-21 | Daikin Ind Ltd | 空気調和装置の運転制御装置 |
JPH0755234A (ja) * | 1993-08-16 | 1995-03-03 | Toshiba Corp | 空気調和装置 |
JPH07294029A (ja) * | 1994-04-28 | 1995-11-10 | Toshiba Corp | 空気調和機の制御方法 |
Non-Patent Citations (1)
Title |
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See also references of EP2631550A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110553335A (zh) * | 2019-09-11 | 2019-12-10 | 湖南大学 | 一种侧墙辐射空调*** |
Also Published As
Publication number | Publication date |
---|---|
EP2631550A4 (en) | 2018-03-07 |
CN103154621B (zh) | 2016-02-24 |
CN103154621A (zh) | 2013-06-12 |
AU2011313172B2 (en) | 2015-05-07 |
JP2012083011A (ja) | 2012-04-26 |
AU2011313172A1 (en) | 2013-05-23 |
EP2631550A1 (en) | 2013-08-28 |
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