WO2017138133A1 - Système de climatisation à eau chaude/eau froide - Google Patents

Système de climatisation à eau chaude/eau froide Download PDF

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Publication number
WO2017138133A1
WO2017138133A1 PCT/JP2016/054038 JP2016054038W WO2017138133A1 WO 2017138133 A1 WO2017138133 A1 WO 2017138133A1 JP 2016054038 W JP2016054038 W JP 2016054038W WO 2017138133 A1 WO2017138133 A1 WO 2017138133A1
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Prior art keywords
thermo
water
hot
temperature
control
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PCT/JP2016/054038
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English (en)
Japanese (ja)
Inventor
篤志 河村
進一 内野
美藤　尚文
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三菱電機株式会社
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Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2017566480A priority Critical patent/JP6537641B2/ja
Priority to PCT/JP2016/054038 priority patent/WO2017138133A1/fr
Priority to CN201690000321.4U priority patent/CN208436403U/zh
Publication of WO2017138133A1 publication Critical patent/WO2017138133A1/fr

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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
    • F24F11/89—Arrangement or mounting of control or safety devices

Definitions

  • the present invention relates to a hot / cold water air conditioning system for heating or cooling a room by sending hot water or cold water generated by a heat pump heat source device to a hot / cold water air conditioner.
  • a heat pump hot water heating system that performs hot water supply or heating using a heat pump cycle
  • hot water heated from a heat pump cycle refrigerant through a heat exchanger is supplied to an indoor radiator or hot water storage tank that performs heating, and then used.
  • a heating hot water circulation circuit is provided for returning the hot water to the heat exchanger of the heat pump cycle.
  • the heating hot water circulation circuit is provided with a forward temperature sensor for detecting the forward temperature of the supplied hot water.
  • the forward temperature control that is quick and easy to control with respect to the change of the heat pump capacity (operating frequency of the compressor) in the heat pump cycle is mainly performed.
  • the heat pump cycle heat source side operates the compressor Implement frequency control and operate the compressor with minimum supply capacity. If the amount of heat supplied by the operation with this minimum supply capacity is larger than the heat radiation amount on the air conditioning hot water supply load side, the going temperature of the heating hot water circulation circuit exceeds the target going temperature. There may be a state of so-called ON / OFF cycle operation where the thermo ON / OFF is intermittently generated in a short period of time.
  • the operating point temperature of the thermo ON / OFF is set. It is corrected. That is, when it is detected that the number of stoppages of the compressor within a predetermined time is increased, the preset target value of the refrigerant evaporating temperature or condensing temperature is changed, and the actual evaporating temperature or condensing temperature is changed. Control to reduce the deviation is performed. Moreover, in the air conditioning apparatus described in Patent Document 2, the thermo-off operating point temperature and the thermo-on operating point temperature set as initial values are corrected according to the duration of the thermo-off to prevent the thermo-off time from being shortened. Yes.
  • the extension of the thermo-ON / OFF time interval in the heat pump heat source machine is a target value or initial value that is a criterion for starting the thermo-ON / OFF operation. This is done by changing the threshold value. Therefore, there is a problem that the problem of inflow of liquid refrigerant to the compressor that may occur when the supply capacity of the heat pump heat source side exceeds the air conditioning hot water supply load and the accompanying decrease in the oil concentration of the refrigeration oil cannot be avoided. There is.
  • the present invention has been made in order to solve the above-described problems. Even if the supply capacity on the heat pump heat source side exceeds the air conditioning hot water supply load, the thermo pump ON / OFF cycle operation of the heat pump heat source machine is performed. It aims at preventing and suppressing the fall of the oil concentration in a compressor.
  • a hot / cold water air conditioning system includes a heat pump heat source unit having a compressor, an air conditioner that performs indoor air conditioning, a circular circulation channel that connects the heat pump heat source unit and the air conditioning unit in a ring shape, and water in the circulation channel
  • a water circulation pump that circulates the water
  • a water temperature sensor that detects the temperature of water that flows out of the heat pump heat source device by the operation of the water circulation pump
  • a control device that controls the thermo ON / OFF of the heat pump heat source device.
  • thermo-ON When the difference between the set target water temperature and the outgoing water temperature is the first temperature difference, the device is thermo-ON, and when the difference between the target water temperature and the outgoing water temperature is the second temperature difference, the thermo ON / OFF normal control is performed.
  • Thermo-ON / OFF suppression control for thermo-ON / OFF at a time interval longer than the thermo-ON / OFF time interval of normal control ON / OFF The thermo-ON / OFF control means to be executed and the switching means for switching from the thermo-ON / OFF normal control to the thermo-ON / OFF suppression control are executed.
  • thermo ON / OFF control means is forced to stop the compressor based on the refrigerant temperature in the compressor when the thermo ON / OFF normal control is switched to the thermo ON / OFF suppression control by the switching means.
  • thermo ON / OFF cycle operation is being executed in the thermo ON / OFF suppression control that is executed after the thermo ON / OFF cycle operation state is confirmed.
  • Set the forced stop time to forcibly stop the compressor based on the refrigerant temperature of the compressor at the time, add the passage of the forced stop time to the thermo-ON condition, and the temperature of the outgoing water temperature that occurred during the forced stop Based on the change, the operating point temperature of the thermo OFF is changed. Therefore, it is possible to suppress the thermo ON / OFF cycle operation while taking into account the operation state of the compressor.
  • thermo ON / OFF cycle operation As a result, even if the minimum supply capacity of the heat pump heat source machine exceeds the required heat quantity of the air conditioning equipment, it is possible to prevent the thermo ON / OFF cycle operation and to suppress the decrease in oil concentration in the compressor.
  • a high-efficiency and long-life hot / cold water air conditioning system can be provided.
  • FIG. 1 is a block diagram showing a schematic configuration of a hot / cold water air-conditioning system according to Embodiment 1 of the present invention.
  • the hot / cold water air conditioning system shown in FIG. 1 includes a heat pump heat source unit 1 that can perform either hot water heating or cold water cooling, a hot / cold water air conditioner 2 (air conditioner) for indoor air conditioning, and a heat pump.
  • the heat source unit 1 and the hot / cold water air conditioner 2 are connected in a ring to form a circulation channel, a water circulation pump 3 for circulating water in the circulation channel, and the operation of the water circulation pump 3 from the heat pump heat source unit 1
  • An outgoing water temperature sensor 5 for detecting the temperature of hot water or cold water flowing out (hereinafter referred to as water temperature) and a control device 6 are provided.
  • the hot / cold water air conditioner 2 heats or cools the indoor space according to hot water or cold water flowing from the heat pump heat source unit 1 through the pipe 4.
  • the water circulation pump 3 rotates at a constant rotational speed when AC power is applied under the control of the control device 6.
  • FIG. 2 is a refrigerant circuit diagram illustrating a schematic configuration of the heat pump heat source apparatus illustrated in FIG. 1.
  • the heat pump heat source unit 1 includes a compressor 103, a four-way valve 104, a water heat exchanger 102, a first expansion valve 106, an intermediate pressure receiver 105, a second expansion valve 107, and an air heat exchanger 101, which are sequentially arranged.
  • a refrigerant circuit is configured by connecting with piping.
  • the configuration of the refrigerant circuit is an example and is not limited.
  • the compressor 103 includes an inverter device and the like, and finely changes the capacity for sucking and compressing the refrigerant in accordance with the operation frequency controlled by the control device 6.
  • the four-way valve 104 switches so that the refrigerant from the compressor 103 flows into the water heat exchanger 102 during the hot water heating operation, and switches so that the refrigerant from the air heat exchanger 101 is sucked into the compressor 103.
  • the four-way valve 104 switches so that the refrigerant from the compressor 103 flows into the air heat exchanger 101 during the cold water cooling operation, and switches so that the refrigerant from the water heat exchanger 102 is sucked into the compressor 103.
  • the switching of the four-way valve 104 is performed by the control device 6.
  • the water heat exchanger 102 performs heat exchange between the refrigerant flowing in the refrigerant circuit and the water flowing in the pipe.
  • This water heat exchanger 102 acts as a radiator (condenser) during the hot water heating operation, and heats the water flowing in the piping. Further, the water heat exchanger 102 acts as a heat absorber (evaporator) during the cold water cooling operation, and cools the water flowing in the piping.
  • the water heat exchanger 102 is built in the heat pump heat source unit 1. However, for example, the water heat exchanger 102 may be provided separately from the heat pump heat source unit 1.
  • the hot / cold water air conditioner 2 may be provided.
  • the first expansion valve 106 adjusts the flow rate of the refrigerant to adjust (depressurize) the pressure of the refrigerant flowing through the water heat exchanger 102, for example.
  • the intermediate pressure receiver 105 is provided between the first expansion valve 106 and the second expansion valve 107 in the refrigerant circuit, and accumulates excess refrigerant in the refrigerant circuit.
  • a suction pipe connected from the four-way valve 104 to the suction side of the compressor 103 passes through the intermediate pressure receiver 105.
  • the intermediate pressure receiver 105 can exchange heat between the refrigerant passing through the suction pipe and the surplus refrigerant, and has a function as an internal heat exchanger.
  • the second expansion valve 107 adjusts the pressure by adjusting the flow rate of the refrigerant in the same manner as the first expansion valve 106.
  • the air heat exchanger 101 is, for example, a fin-and-tube heat exchanger that performs heat exchange between refrigerant and outside air sent by a blower.
  • the air heat exchanger 101 acts as a heat absorber (evaporator) during hot water heating operation, and acts as a radiator (condenser) during cold water cooling operation.
  • R410A or R407C which is an HFC mixed refrigerant
  • R32 which is an HFC single refrigerant having a low global warming potential
  • a hydrofluoroolefin-based refrigerant HFO1234yf, HFO1234ze, etc.
  • an HC-based R290 (propane) or R1270 (propylene) single or mixed refrigerant may be used.
  • the above-described control device 6 controls the ON / OFF operation of the compressor 103 and the operation frequency of the compressor 103 based on the water temperature detected by the outgoing water temperature sensor 5. Further, the control device 6 is based on the indoor set temperature set by the user's remote control operation, the indoor temperature obtained by the air conditioning of the hot / cold water air conditioner 2, the water temperature detected by the outgoing water temperature sensor 5, and the like. 1 operation is controlled.
  • the circulating water discharged from the water circulation pump 3 is cooled by the water heat exchanger 102 of the heat pump heat source unit 1.
  • the cooled chilled water is supplied to the hot / cold water air conditioner 2 and exchanges heat with the room air (heat absorption) to cool the room. Then, the cold water whose temperature has been raised by the heat exchange is again sucked into the water circulation pump 3 and sent to the heat pump heat source unit 1 for circulation.
  • FIG. 3 is a block diagram showing the control device of the hot / cold water air-conditioning system according to Embodiment 1 and the components that perform input / output between the control device.
  • the control device 6 includes a thermo ON / OFF control means 61, a switching means 62, and a return means 63.
  • the thermo ON / OFF control means 61 is configured to perform thermo ON / OFF normal control in which the thermo ON / OFF is repeated at predetermined time intervals based on the incoming water temperature input from the outgoing water temperature sensor 5, and the thermo ON / OFF is predetermined.
  • Thermo ON / OFF suppression control executed at a time interval longer than the time interval is executed.
  • the switching means 62 performs switching from the thermo ON / OFF normal control to the thermo ON / OFF suppression control based on the outgoing water temperature input from the outgoing water temperature sensor 5 and the operating frequency of the compressor 103.
  • the return means 63 performs a return from the thermo ON / OFF suppression control to the thermo ON / OFF normal control based on the incoming water temperature and the operating frequency of the compressor 103.
  • FIG. 4 is a flowchart showing the control operation of the compressor in the hot water heating operation of the hot / cold water air conditioning system according to the first embodiment. The control shown in the flowchart of FIG.
  • control device 6 drives the four-way valve 104 to connect the discharge side of the compressor 103 and the water heat exchanger 102, and connects the air heat exchanger 101 and the suction side of the compressor 103.
  • control device 6 drives the compressor 103 to discharge the refrigerant and circulates in the refrigerant circuit.
  • control apparatus 6 rotates the water circulation pump 3 with a fixed rotational speed, circulates the water in the piping 4, and starts the driving
  • thermo ON / OFF control means 61 of the control device 6 starts the thermo ON / OFF normal control of the compressor 103 in step S1.
  • the thermo ON / OFF control means 61 reads the water temperature detected by the incoming water temperature sensor 5, and then compares the read water temperature with the target water temperature to control the thermo ON / OFF and operating frequency of the compressor 103. To do.
  • This target water temperature is, for example, a value set by a user's remote control operation. If the outgoing water temperature detection temperature Tm detected by the outgoing water temperature sensor 5 is equal to or lower than the target outgoing water temperature Tt ⁇ T1 (first temperature difference, for example, 0.5 deg), the thermo is turned ON. On the other hand, if the outgoing water temperature detection temperature Tm detected by the outgoing water temperature sensor 5 is equal to or higher than the target outgoing water temperature Tt + T2 (second temperature difference, for example, 2 deg), the thermo is turned off.
  • the switching determination to the thermo ON / OFF suppression control is performed during the operation by the thermo ON / OFF normal control in step S1.
  • the switching unit 62 checks whether or not the operating frequency of the compressor 103 of the heat pump heat source apparatus 1 is the minimum frequency (for example, 25 Hz). If it is confirmed that the operating frequency of the compressor 103 is not the minimum frequency, the process proceeds to step S3. The fact that the compressor 103 is operated at a frequency higher than the minimum frequency can be determined that the minimum supply capacity of the heat pump heat source unit 1 does not exceed the amount of heat required for the hot / cold water air conditioner 2.
  • step S3 the determination count number Ncount, which is a variable used for switching determination from the thermo-ON / OFF normal control to the thermo-ON / OFF suppression control, is reset to zero.
  • the determination count number Ncount is a variable that is incremented by 1 when the switching of the thermo ON / OFF in a short time is detected.
  • the switching unit 62 resets the determination count number Ncount to zero. Thereafter, the control returns to step S1, and the thermo ON / OFF normal control by the thermo ON / OFF control means 61 is continued.
  • step S4 the switching means 62 checks whether or not the thermo is turned off within a predetermined time TA (first predetermined time, for example, 10 minutes) after the thermo is turned on. If the time interval from the thermo-ON to the thermo-OFF is longer than the predetermined time TA, that is, that the operation by the thermo-ON has exceeded the predetermined time TA, it can be determined that the thermo-ON / OFF cycle operation is not in the state. Therefore, if it is confirmed that the thermo is not turned off within the predetermined time TA after the thermo is turned on, the process proceeds to step S3, and the determination count number Ncount is reset to zero. Thereafter, the control returns to step S1, and the thermo ON / OFF normal control by the thermo ON / OFF control means 61 is continued.
  • TA first predetermined time, for example, 10 minutes
  • step S4 If it is confirmed in step S4 that the thermo is turned off within a predetermined time TA after the thermo is turned on, the process proceeds to step S5.
  • step S5 in the state where the required heat quantity of the hot / cold water air conditioner 2 is smaller than the operation capacity at the minimum frequency of the compressor 103, the thermo OFF is performed before the predetermined time TA has elapsed from the thermo ON. This is the case.
  • step S5 it is checked whether or not the determination count number Ncount is zero. If the determination count number Ncount is not zero, the process proceeds to step S6.
  • step S6 the switching unit 62 checks whether or not a predetermined time TB (second predetermined time, for example, 10 minutes) has elapsed since 1 was added to the determination count number Ncount last time.
  • a predetermined time TB second predetermined time, for example, 10 minutes
  • step S6 When it is confirmed in step S6 that the predetermined time TB has elapsed, it is confirmed that the time from the thermo ON to the time when the thermo is turned off is shorter than the predetermined time TA, and then from the thermo ON again. This is a case where the predetermined time TB has elapsed until it is confirmed that the time until the thermo-OFF is shorter than the predetermined time TA. Therefore, it is determined that there is no thermo-ON / OFF cycle operation. Therefore, in this case, the process proceeds to step S3, and the switching unit 62 resets the determination count number Ncount to zero. Thereafter, the control returns to step S1, and the thermo ON / OFF normal control by the thermo ON / OFF control means 61 is continued.
  • step S5 if it is confirmed in step S5 that the determination count number Ncount is zero, the process of step S6 is skipped and the process of step S7 is executed.
  • step S5 although thermo-ON / OFF is not repeated in a short time, thermo-OFF is confirmed within a predetermined time TA from thermo-ON, and thermo-ON / OFF cycle operation may have started. There is. Therefore, in this case, the process of step S6 is not performed, and 1 is added to the determination count number Ncount in step S7.
  • step S8 the switching means 62 checks whether or not the determination count number Ncount is equal to or greater than a predetermined number.
  • the case where the determination count number Ncount is less than a certain number is a case where the thermo-ON / OFF in a short time does not occur frequently in a state where the compressor 103 is operated at the lowest frequency. This is a case where the vehicle is not in the OFF cycle operation state. In this case, it is determined that even if the thermo-ON / OFF normal control is continued, the life of each component constituting the refrigerant circuit is not affected, and the problem of suction of the liquid refrigerant in the compressor 103 does not occur. it can. Therefore, if the determination count number Ncount is less than the predetermined number, the control returns to step S1, and the thermo-ON / OFF normal control by the thermo-ON / OFF control means 61 is continued.
  • thermo-ON / OFF normal control performs switching from the thermo ON / OFF normal control to the thermo ON / OFF suppression control.
  • Steps S2 to S8 described above are processing procedures executed by the switching means 62, and a process for determining switching to the thermo ON / OFF suppression control while the thermo ON / OFF normal control is being performed. It is a procedure.
  • the thermo ON / OFF control means 61 performs the following control. After the thermo-ON, when the outgoing water temperature detection temperature Tm detected by the outgoing water temperature sensor 5 does not reach the target outgoing water temperature Tt + T2, and the difference is large, the thermo ON / OFF control means 61 changes the operating frequency of the compressor 103. Increase the heat supply.
  • the thermo-ON / OFF control means 61 adjusts the compressor 103 so that the supply capacity of the heat pump heat source unit 1 and the heat radiation amount of the hot / cold water air conditioner 2 are balanced. Reduce the operating frequency gradually to maintain the temperature of the incoming water temperature.
  • the minimum frequency of the heat pump heat source machine 1 It can be considered that the minimum supply capacity in operation is larger than the heat radiation amount of the hot / cold water air conditioner 2.
  • the supply capacity of the heat pump heat source unit 1 becomes zero.
  • the outgoing water temperature detection temperature Tm detected by the outgoing water temperature sensor 5 decreases and becomes equal to or lower than the target outgoing water temperature Tt ⁇ T1 again, the thermo-ON is performed.
  • the minimum supply capability in the minimum frequency operation of the heat pump heat source apparatus 1 is larger than the heat radiation amount of the hot / cold water air conditioner 2, so the thermo pump is turned off again.
  • thermo ON the compressor 103 is operated at the minimum frequency
  • thermo OFF the compressor 103 is stopped
  • the switching means 62 determines whether or not the ON / OFF cycle operation has been performed within a certain period of time by the processes in steps S2 to S8 described above.
  • thermo ON / OFF suppression control executed in step S9 will be described.
  • the thermo ON / OFF control means 61 forcibly stops the compressor 103 without comparing the forward water temperature detection temperature Tm detected by the forward water temperature sensor 5 with the target forward water temperature Tt.
  • the forced stop time ⁇ is, for example, 10 minutes.
  • the outgoing water temperature detection temperature Tm is compared with the target outgoing water temperature Tt.
  • the thermo ON / OFF control means 61 performs thermo ON when the outgoing water temperature detection temperature Tm becomes equal to or lower than the target outgoing water temperature Tt ⁇ T1.
  • the predetermined threshold T3 third temperature difference, for example, 5 deg
  • the forced stop time ⁇ of the compressor 103 set in the thermo-ON / OFF suppression control is the refrigerant temperature (for example, the compressor) when the determination count number Ncount reaches a certain number during the thermo-ON operation. 103). In other words, it is determined by the refrigerant temperature in the compressor 103 when the switching means 62 switches from the thermo ON / OFF normal control to the thermo ON / OFF suppression control. When the refrigerant temperature is relatively high, the forced stop time ⁇ is set to be relatively long.
  • the threshold T3 used for comparing the forward water temperature detection temperature Tm and the target forward water temperature Tt is the value after the thermo-ON / OFF suppression control is started.
  • the first thermo OFF is confirmed, it is set according to the degree of decrease in the going water temperature during the forced stop time ⁇ .
  • the operating point temperature of the thermo OFF is corrected based on the degree of decrease in the outgoing water temperature during the forced stop time ⁇ . Therefore, if the refrigerant temperature is relatively high and the forced stop time ⁇ is set to be long, the drop in the going water temperature becomes larger, so the threshold T3 is set high.
  • the forced stop time ⁇ and the threshold value T3 differ depending on the performance of the heat pump heat source apparatus 1, and therefore, the forced stop time ⁇ and the threshold value T3 are set based on a result of a test that actually generates a thermo ON / OFF cycle operation.
  • thermo ON / OFF suppression control the forward water temperature detection temperature Tm detected by the forward water temperature sensor 5 is compared with the forward water temperature upper limit value Tx, and when the forward water temperature detection temperature Tm exceeds the forward water temperature upper limit value Tx, The thermo ON / OFF control means 61 executes a process for stopping the compressor 103.
  • the forward water temperature upper limit value Tx is set by the user using a remote controller or the like. This process prevents the hot water having a temperature higher than the allowable upper limit temperature from flowing into the hot / cold water air conditioner 2 due to the high temperature of the outgoing water, thereby preventing malfunction of the operation of the hot / cold water air conditioner 2.
  • the return means 63 performs the return determination to the thermo-ON / OFF normal control.
  • the return means 63 determines whether or not the compressor 103 is continuously operating at a frequency higher than the minimum operating frequency for a predetermined time (third predetermined time) (for example, the minimum operating frequency is 25 Hz and the predetermined time If it is 60 minutes, it is checked whether or not it is continuously operating at 26 Hz for 60 minutes).
  • the control returns to step S9 again and the thermo ON / OFF suppression control by the thermo ON / OFF control means 61 is continued.
  • the minimum supply capacity of the heat pump heat source unit 1 is less than the heat dissipation amount of the hot / cold water air conditioner 2, and the thermo ON / OFF Even if the normal control is performed, it can be determined that the possibility of the thermo-ON / OFF cycle operation is low. Accordingly, in this case, the process proceeds to step S3, and the return means 63 resets the determination count number Ncount to zero, returns to step S1, and controls the thermo ON / OFF control means 61 from the thermo ON / OFF suppression control to the thermo ON. / OFF Return to normal control.
  • FIG. 5 is a time chart showing the operating state of the compressor in the hot water heating operation in the conventional hot / cold water air conditioning system
  • FIG. 6 is the time showing the operating state of the compressor in the hot water heating operation in the hot / cold water air conditioning system according to Embodiment 1. It is a chart.
  • the time chart of FIG. 5 and FIG. 6 has shown the driving
  • thermo ON / OFF normal control is executed as shown in FIG. Since the responsiveness of the water temperature detected by the going water temperature sensor 5 is fast, the water temperature becomes equal to or higher than the target water temperature immediately after the thermo-ON, and the thermo-OFF (operation of the compressor 103 of the heat pump heat source unit 1 is stopped). Even if the compressor 103 is stopped, the water circulation pump 3 is driven and the circulating water flows. Therefore, after the thermo is turned off, the water temperature soon becomes lower than the target water temperature, and the thermo is turned on. That is, the compressor 103 is in a thermo ON / OFF cycle operation, and the heat pump heat source unit 1 is in an ON / OFF operation.
  • thermo ON / OFF normal control when the thermo ON / OFF at a short time interval reaches a predetermined number of times and the thermo ON / OFF cycle operation is detected, the thermo ON / OFF normal control suppresses the thermo ON / OFF normal control. Switch to control.
  • the thermo ON / OFF suppression control when the operation is switched to the thermo ON / OFF suppression control, that is, when the thermo ON / OFF reaches a predetermined number of times, the forced stop time is based on the refrigerant temperature such as the suction heating degree of the compressor 103, for example. Is set. Then, the passage of the forced stop time is added to the condition for turning on the thermo.
  • thermo-ON / OFF time interval the number of thermo-ON / OFF times without impairing the comfort of air conditioning.
  • thermo ON / OFF normal control is also performed in the cold water cooling operation in the same processing procedure as the flowchart shown in FIG. Executed.
  • the refrigerant flow is reversed from that in the hot water heating operation by switching the four-way valve 104. That is, the air heat exchanger 101 acts as a radiator (condenser), and the water heat exchanger 102 acts as a heat absorber (evaporator) to cool the water flowing through the water heat exchanger 102.
  • Thermo ON / OFF suppression control in the cold water cooling operation is executed in the same manner as in step S9 described above.
  • the forced stop time is set based on the refrigerant temperature of the compressor 103 when the thermo ON / OFF reaches a predetermined number of times.
  • the passage of the forced stop time of the compressor 103 is added to the condition of the thermo ON, and the operating point temperature of the thermo OFF after the next time is corrected based on the temperature rise of the forward water temperature that occurs during the forced stop time.
  • the control device 6 has the minimum supply capacity of the heat pump heat source unit 1 exceeding the amount of heat dissipation or heat absorption required by the hot / cold water air-conditioning equipment 2.
  • the thermo ON / OFF normal control is switched to the thermo thermo ON / OFF suppression control, while the minimum supply capacity of the heat pump heat source unit 1 is hot / cold water air conditioning equipment
  • the operation is switched from the thermo ON / OFF suppression control to the thermo ON / OFF normal control.
  • thermo-ON / OFF suppression control conditions for thermo-ON and thermo-OFF are set based on the refrigerant temperature of the compressor 103 when it is determined that the thermo-ON / OFF cycle operation is in progress. Therefore, even when the minimum supply capacity of the heat pump heat source device 1 is larger than the heat dissipation amount in the case of hot water heating of the hot / cold water air conditioner 2 or the heat absorption amount in the case of cold water cooling, the thermo-ON / OFF cycle operation can be suppressed. As a result, the thermo ON / OFF cycle operation can be prevented, and the decrease in the oil concentration in the compressor 103 can be suppressed, and a high-efficiency and long-life hot / cold water air conditioning system can be provided.
  • FIG. FIG. 7 is a block diagram showing a schematic configuration of a hot / cold water air-conditioning system according to Embodiment 2 of the present invention.
  • the second embodiment includes an auxiliary heater 7 that heats the circulating water between the heat pump heat source unit 1 and the outgoing water temperature sensor 5 in the hot / cold water air conditioning system of the first embodiment.
  • the auxiliary heater 7 In the hot water heating operation, when the supply capacity of the heat pump heat source unit 1 is insufficient, the circulating water is heated using the auxiliary heater 7 as an auxiliary heat source. Power supply to the auxiliary heater 7 is performed by the control device 6.
  • the control operation of the compressor 103 in the hot water heating operation or the cold water cooling operation is the same as the flowchart shown in FIG. That is, the control device 6 performs intermittent switching of the thermo ON / OFF in a short time in a state where the minimum supply capacity of the heat pump heat source unit 1 exceeds the amount of heat dissipation or heat absorption required by the hot / cold water air conditioner 2. If detected, the thermo-ON / OFF normal control is switched to the thermo-ON / OFF suppression control.
  • thermo ON / OFF suppression control is switched to the thermo ON / OFF normal control. Then, in the thermo ON / OFF suppression control, the control device 6 determines the conditions for the thermo ON and the thermo OFF based on the refrigerant temperature of the compressor 103 at the time when it is determined that the thermo ON / OFF cycle operation is in progress. Set.
  • thermo-ON / OFF cycle operation can be suppressed in a state where the operation state 103 is taken into consideration, and the same effect as in the first embodiment can be obtained.
  • FIG. 8 is a block diagram illustrating a schematic configuration of the hot / cold water air-conditioning system according to the third embodiment.
  • the third embodiment includes the hot water storage tank 9 in which the heat exchanger 8 is built in the hot / cold water air conditioning system of the second embodiment.
  • One end of the heat exchanger 8 is connected to the branch pipe 12a (branch point) inserted in the pipe 4 between the auxiliary heater 7 and the hot / cold water air conditioner 2 via the pipe 12, and the other end of the heat exchanger 8 is connected.
  • the hot water storage tank 9 is connected in parallel to the hot / cold water air conditioner 2 via the pipe 12.
  • a tank water temperature sensor 10 for detecting the water temperature in the hot water storage tank 9 heated by the heat exchanger 8 is attached to the hot water storage tank 9.
  • the control device 6 selects one of the hot water heating operation, the cold water cooling operation, and the hot water supply operation in accordance with, for example, a user's remote control operation.
  • the control device 6 drives the electric three-way valve 11 so that water (hot water or cold water) circulates between the heat pump heat source unit 1 and the hot / cold water air conditioner 2 as described above. To do.
  • the control apparatus 6 drives the electric three-way valve 11 so that warm water circulates between the heat pump heat source unit 1 and the heat exchanger 8 during the hot water supply operation.
  • the operation of the compressor 103 in the operation of the hot water heating operation or the cold water cooling operation and the operation of the hot water supply operation is the same as the flowchart shown in FIG. 4, and the second embodiment has been described above. Street. Therefore, even if the minimum supply capacity of the heat pump heat source unit 1 by controlling the operation frequency of the compressor 103 is larger than the heat dissipation amount in the case of hot water heating of the hot / cold water air conditioner 2 or the heat absorption amount in the case of cold water cooling, the compressor The thermo-ON / OFF cycle operation can be suppressed in a state where the operation state 103 is taken into account, and the same effect as in the first and second embodiments can be obtained.
  • the auxiliary heater 7 is provided between the heat pump heat source unit 1 and the hot / cold water air conditioner 2, but the present invention is not limited to this. It is good also as a structure which connects the heat pump heat source machine 1 and the hot / cold water air-conditioning apparatus 2 without going through the auxiliary heater 7.
  • the control device 6 repeats the state where the minimum supply capacity of the heat pump heat source unit 1 is larger than the required heat amount of the hot / cold water air conditioner 2 and the thermo ON / OFF is shorter than a predetermined time interval. Has reached the predetermined number of times, the thermo-ON / OFF normal control is switched to the thermo-ON / OFF suppression control. Therefore, even when the minimum supply capacity of the heat pump heat source device 1 is larger than the required heat quantity of the hot / cold water air conditioner 2, it is possible to prevent the thermo ON / OFF cycle operation.
  • the thermo-ON / OFF control means 61 of the control device 6 has a relatively high refrigerant temperature in the compressor 103 when it is determined that the thermo-ON / OFF cycle operation is being performed.
  • the threshold value corrected based on the changed outgoing water temperature during the forced stop time also becomes relatively large. That is, the thermo-ON condition and the thermo-OFF operating point are set in consideration of the operation state of the compressor 103. Therefore, in the thermo ON / OFF suppression control, the thermo ON / OFF time interval can be extended, and the inflow of liquid refrigerant in the compressor 103 and the accompanying decrease in the oil concentration of the refrigerating machine oil can be prevented.
  • the switching means 62 is operated when the operation frequency of the compressor 103 is not the minimum frequency in the operation with the thermo-ON, when the operation with the thermo-ON continues for a predetermined time TA, and until the thermo-ON is turned off.
  • the determination count number Ncount is reset and the thermo-ON / OFF normal control is continued. Therefore, switching from the thermo-ON / OFF normal control to the thermo-ON / OFF suppression normal control can be executed accurately.
  • the return means 63 is such that the compressor 103 of the heat pump heat source unit 1 operates at an operating frequency higher than the minimum operating frequency, for example, for 60 minutes.
  • the thermo ON / OFF suppression control is switched to the thermo ON / OFF normal control. Therefore, the end of the thermo ON / OFF suppression control can be accurately executed.

Abstract

L'invention concerne un système de climatisation à eau chaude/eau froide comprenant : une machine source de chaleur à pompe à chaleur comportant un compresseur ; un climatiseur ; une tuyauterie formant un passage de circulation d'eau au moyen du raccordement de la machine source de chaleur à pompe à chaleur au climatiseur dans un agencement circulaire ; une pompe de circulation d'eau destinée à faire circuler de l'eau dans le passage de circulation d'eau ; un capteur de température de l'eau servant à détecter la température de l'eau sortant de la machine source de chaleur à pompe à chaleur ; et un dispositif de commande destiné à exécuter une commande de marche/arrêt thermique afin de commander la marche ou l'arrêt thermique sur la base de la différence entre une température cible prédéfinie de l'eau et la température de l'eau sortante. S'il a été établi qu'une opération de cycle de marche/arrêt thermique est en cours d'exécution dans le compresseur, le dispositif de commande change à une commande de suppression de marche/arrêt thermique. Dans la commande de suppression de marche/arrêt thermique, le dispositif de commande définit les conditions de fonctionnement de marche thermique et d'arrêt thermique sur la base de la température du fluide frigorigène dans le compresseur au moment où il a été établi que l'opération de cycle de marche/arrêt thermique est en cours d'exécution.
PCT/JP2016/054038 2016-02-10 2016-02-10 Système de climatisation à eau chaude/eau froide WO2017138133A1 (fr)

Priority Applications (3)

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JP2017566480A JP6537641B2 (ja) 2016-02-10 2016-02-10 温冷水空調システム
PCT/JP2016/054038 WO2017138133A1 (fr) 2016-02-10 2016-02-10 Système de climatisation à eau chaude/eau froide
CN201690000321.4U CN208436403U (zh) 2016-02-10 2016-02-10 冷热水空调系统

Applications Claiming Priority (1)

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PCT/JP2016/054038 WO2017138133A1 (fr) 2016-02-10 2016-02-10 Système de climatisation à eau chaude/eau froide

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JP2019049390A (ja) * 2017-09-11 2019-03-28 東芝キヤリア株式会社 熱源水制御方法及び熱源水制御装置
CN113983580A (zh) * 2021-11-02 2022-01-28 珠海格力电器股份有限公司 一种厨房空调及其控制方法和控制装置、处理器
CN114110978A (zh) * 2021-11-22 2022-03-01 珠海格力节能环保制冷技术研究中心有限公司 空调系统、控制方法以及空调机组

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JP2015098982A (ja) * 2013-11-19 2015-05-28 三菱電機株式会社 温冷水空調システム
JP2015200470A (ja) * 2014-04-09 2015-11-12 株式会社東芝 空気調和機
JP2015215107A (ja) * 2014-05-08 2015-12-03 三菱電機株式会社 空気調和機

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JP2015098982A (ja) * 2013-11-19 2015-05-28 三菱電機株式会社 温冷水空調システム
JP2015200470A (ja) * 2014-04-09 2015-11-12 株式会社東芝 空気調和機
JP2015215107A (ja) * 2014-05-08 2015-12-03 三菱電機株式会社 空気調和機

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019049390A (ja) * 2017-09-11 2019-03-28 東芝キヤリア株式会社 熱源水制御方法及び熱源水制御装置
CN113983580A (zh) * 2021-11-02 2022-01-28 珠海格力电器股份有限公司 一种厨房空调及其控制方法和控制装置、处理器
CN114110978A (zh) * 2021-11-22 2022-03-01 珠海格力节能环保制冷技术研究中心有限公司 空调系统、控制方法以及空调机组

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