JP5981396B2 - Heat pump heat source machine - Google Patents

Description

  The present invention relates to a heat pump heat source machine equipped in a heating or cooling system.

  A heat pump heat source machine equipped in a heating system is known (eg, Patent Document 1). There is also known an air conditioner that sets a start and end temperature of cooling and heating with a predetermined difference with respect to a given set room temperature (for example, Patent Document 2).

  In the heat pump heat source device of Patent Document 1, the heat pump unit circulates the refrigerant between the heat collection side and the load side heat exchanger by the compressor to perform heat transfer between the heat exchangers, and the load side circulation pump The load-side heat medium is circulated in the load-side circulation passage (Patent Document 1 / FIG. 1). The heat pump heat source apparatus is also configured such that, on the load side, the difference between the heat medium temperature on the outgoing side coming out of the heat exchanger and the heat medium temperature on the return side returning to the heat exchanger (= the heat medium temperature on the forward side minus the return side) ) Is detected. When the difference exceeds the upper limit, the rotation speed of the load-side circulation pump is increased, and when the difference is less than the lower limit, the rotation speed of the load-side circulation pump is decreased (Patent Document 1 / FIG. 3).

  The heat pump heat source device of Patent Document 1 further controls the rotational speed of the compressor of the heat pump unit based on the difference between the forward-side heat medium temperature and a predetermined contrast temperature for the load-side heat medium (Patent Document). 1 / Figure 4).

  Further, the air conditioner of Patent Document 2 is used for both cooling and heating, and for a given set temperature T0 related to room temperature, heating start temperature T4 <cooling end temperature T3 <T0 <heating end temperature T1 <cooling start temperature. T2 is set and room temperature t is detected. When t decreases to the heating start temperature T4, heating starts. When t decreases to the cooling end temperature T3, cooling ends. When t increases to the heating end temperature T1, heating ends, and t becomes the cooling start temperature T2. When the temperature rises to 1, the cooling starts (Patent Document 2 / FIG. 3).

  Furthermore, the air conditioner of Patent Document 2 sets the cooling end temperature T6 (> T3) and the heating end temperature T5 (<T1) separately from the cooling end temperature T1 and the heating end temperature T3. Then, for a predetermined time after switching from heating to cooling or from switching from cooling to heating, the cooling end temperature T6 and the heating end temperature T5 are selected to suppress a rapid change in room temperature (Patent Document 2 / FIG. 3).

  Here, the heat pump heat source machine copes with the load change occurring at an arbitrary time, controls the rotation speed of the compressor of the heat pump unit according to the load at each time point, and controls the heat supply flow rate to the load side. It is desirable to control. For this reason, in the conventional heat pump heat source machine, the load side circulation pump is always operated regardless of the operation and stop of the compressor of the heat pump unit, and the load side heat medium is circulated through the load side circulation passage. The load at each time point is detected from the temperature of the heat medium on the far side of the side heat medium.

JP 2012-233605 A JP-A-6-137737

  The heat load of the air conditioning terminal (the total amount of heat (sensible heat load) and moisture (latent heat load) required to keep the room where the air conditioning terminal is installed) at a predetermined temperature is provided by the air conditioning terminal. It varies depending on the size of the room, the room temperature and the outside temperature. For example, the thermal load of an air conditioning terminal arranged in a large room is larger than the thermal load of an air conditioning terminal arranged in a narrow room. In the case of heating, the heat load of the air conditioning terminal increases as the outside air temperature decreases.

  If the heat load of the air conditioning terminal is small, even if the heat supply from the heat pump heat source device to the air conditioning terminal is delayed, the room can be quickly recovered to a desired temperature. Also, if the temperature of the heat medium on the forward side of the load-side heat medium when switching the operation of the compressor of the heat pump unit is fixed regardless of the heat load of the air conditioning terminal, if the heat load is small This is disadvantageous in terms of power saving of the compressor because the compressor is frequently operated and stopped as compared with the case where the heat load is large.

  On the other hand, the efficiency of the heat pump of the heat pump heat source machine is such that the lower the temperature of the load-side heat medium during heating, and the higher the temperature of the load-side heat medium during cooling, that is, the refrigerant in the load-side heat exchanger. And the temperature difference between the load side heat medium and the load side heat medium become higher, and the power consumption of the heat pump heat source device decreases.

  Therefore, when the heat load of the air conditioning terminal is small, the temperature difference between the refrigerant and the load-side heat medium in the load-side heat exchanger is increased to the extent that the air-conditioning of the room is not hindered, so It is desirable to plan.

  In the heat pump heat source device of Patent Document 1, the difference between the forward side temperature and the return side temperature is detected for the load side heat medium, and when the difference is small, the rotational speed of the load side circulation pump is decreased to increase the difference. In this way, the heat pump efficiency of the heat pump heat source machine is increased. However, the difference between the forward-side temperature and the return-side temperature for the load-side heat medium is determined by the heat output of the air-conditioning terminal at each time point, and is independent of the heat load of the air-conditioning terminal.

  In the air conditioner of Patent Document 2, although the temperature at which air conditioning is actually started and ended is set in a predetermined relationship with a given set temperature, the air conditioning start and end temperatures are predetermined after switching between air conditioning. Only the time is changed temporarily with respect to a normal period, and this temporary change is independent of the control of the heat load.

  In addition, in order to detect the thermal load of the air conditioning terminal, additional equipment such as an outside air temperature sensor and a room temperature sensor in each room, or providing a wiring between these sensors and the control unit of the heat pump heat source machine will increase the cost. Cause.

  The object of the present invention is to save electricity while securing the supply of heat (including both heat dissipation during heating and heat absorption during cooling) according to the heat load on the air conditioning terminal by omitting additional equipment of the sensor. It is to provide a heat pump heat source machine that can.

The heat pump heat source device according to the first aspect of the invention is arranged in the heat collection side circulation passage through which the heat collection side heat medium circulates, the load side circulation passage through which the load side heat medium circulates through the heating terminal, and the heat collection side circulation passage. The heat collection side heat exchanger provided, the load side heat exchanger disposed in the load side circulation passage, and the refrigerant circulation between the heat collection side heat exchanger and the load side heat exchanger A heat pump unit that performs heat transfer; a compressor that is disposed in the heat pump unit and controls circulation of the refrigerant in the heat pump unit; and a load side that is disposed in the load side circulation passage and circulates the load side heat medium. A circulation pump, a temperature detector disposed in the load-side circulation passage and detecting a temperature of a forward heat medium heading toward the heating terminal, and heating equal to or higher than the heating contrast temperature with respect to a predetermined heating contrast temperature Operation end temperature for heating and less than the contrast temperature for heating A heating operation start temperature is set, and the temperature detection by the temperature detector is monitored while the load-side circulation pump is operated. When the detected temperature becomes higher than the heating operation end temperature, the compressor is operated. When the detection temperature is lower than the heating operation start temperature, a compressor control unit that starts operating the compressor, an elapsed time measurement unit that measures an elapsed time from the operation start time of the compressor, If the compressor is stopped before the elapsed time measured by the elapsed time measuring unit reaches a predetermined reference time, the heating contrast temperature is updated so that the heating contrast temperature is lower than before the update. and a comparison temperature update unit that, the comparison temperature updating unit before the time lapse by the measurement of the elapsed time measurement unit reaches the predetermined reference time, place the compressor is continuously be stopped If, for each stop, the so heating versus temperature is stepwise reduced, and updates the heating versus temperature.

  According to the first invention, when the compressor is stopped before the elapsed time measured by the elapsed time measuring unit reaches the predetermined reference time, the heating contrast is set to be lower than that before the update. Update the contrast temperature.

  The continuous operation time from the start of operation of the compressor to the end of operation becomes longer as the heat load of the heating terminal that supplies heat by the circulation of the load-side heat medium by the heat pump heat source device becomes longer. Therefore, when the heating load of the heating terminal is small, the contrast temperature for heating is lowered, so that the temperature difference between the refrigerant and the load-side heat medium in the load-side heat exchanger is increased, the heat pump efficiency is increased, and the power consumption Can be reduced.

  Further, when the heat load of the cooling terminal is small, as the heat pump efficiency increases, the stop time of the compressor increases, and frequent switching between operation and stop of the compressor is suppressed. This also saves power for the compressor.

  In addition, when the heat load of the heating terminal is small, the room can be quickly returned to a desired temperature even if the heat supply from the heat pump heat source unit to the heating terminal is delayed. Therefore, even if the temperature of the load-side heat medium is lowered, it is possible to prevent the heat supply to the heating terminal from being hindered.

  Further, by detecting the thermal load based on the elapsed time that the compressor continues to operate continuously from the start of operation, it is possible to omit the additional equipment of the sensor for detecting the thermal load of the heating terminal.

According to the first aspect of the invention , it is possible to set an appropriate heating contrast temperature for various magnitudes of the thermal load of the heating terminal.

  In the first aspect of the present invention, when the compressor continues to operate after the elapsed time measured by the elapsed time measurement unit reaches the predetermined reference time, It is preferable to update the heating contrast temperature so that the contrast temperature is higher than before the update.

  According to this configuration, when the heat supply flow rate to the heating terminal by the load side heat medium is insufficient, it is possible to cope with the problem by increasing the forward side temperature of the load side heat medium.

The heat pump heat source apparatus according to the second aspect of the invention is arranged in the heat collecting side circulation passage through which the heat collecting side heat medium circulates, the load side circulation passage through which the load side heat medium circulates through the cooling terminal, and the heat collection side circulation passage. The heat collection side heat exchanger provided, the load side heat exchanger disposed in the load side circulation passage, and the refrigerant circulation between the heat collection side heat exchanger and the load side heat exchanger A heat pump unit that performs heat transfer; a compressor that is disposed in the heat pump unit and controls circulation of the refrigerant in the heat pump unit; and a load side that is disposed in the load side circulation passage and circulates the load side heat medium. A circulation pump, a temperature detector disposed in the load-side circulation passage and detecting the temperature of the forward heat medium toward the cooling terminal, and a cooling higher than the cooling contrast temperature with respect to a predetermined cooling contrast temperature Less than the cooling start temperature and the cooling contrast temperature The cooling operation end temperature is set, and the temperature detected by the temperature detector is monitored while operating the load-side circulation pump. When the detected temperature becomes lower than the cooling operation end temperature, the compressor is operated. When the detected temperature becomes higher than the cooling operation start temperature, a compressor control unit that starts operating the compressor, an elapsed time measurement unit that measures an elapsed time from the operation start time of the compressor, If the compressor stops before the elapsed time measured by the elapsed time measuring unit reaches a predetermined reference time, the cooling contrast temperature is updated so that the cooling contrast temperature becomes higher than before the update. and a comparison temperature update unit that, the comparison temperature updating unit before the time lapse by the measurement of the elapsed time measurement unit reaches the predetermined reference time, place the compressor is continuously be stopped Each such that said cooling for comparing temperature rises stepwise, and updates the cooling for comparing temperature.

  According to the second aspect of the invention, when the compressor is stopped before the elapsed time measured by the elapsed time measurement unit reaches the predetermined reference time, the cooling contrast is set so that the cooling contrast temperature becomes higher than before the update. Update the temperature.

  The continuous operation time from the start of operation of the compressor to the end of operation becomes longer as the heat load of the cooling terminal to which the heat pump heat source device supplies heat (heat absorption) by circulation of the load side heat medium is larger. Therefore, when the heat load of the cooling terminal is small, the cooling contrast temperature is increased, thereby increasing the temperature difference between the refrigerant and the load-side heat medium in the load-side heat exchanger, increasing the heat pump efficiency, and power consumption. Can be reduced.

  Further, when the heat load of the cooling terminal is small, as the heat pump efficiency increases, the stop time of the compressor increases, and frequent switching between operation and stop of the compressor is suppressed. This also saves power for the compressor.

  In addition, when the heat load of the cooling terminal is small, the room can be quickly returned to a desired temperature even if the heat supply from the heat pump heat source unit to the cooling terminal (supply of heat absorption) is delayed. Therefore, even if the temperature of the load-side heat medium is increased, it is possible to prevent the heat supply to the cooling terminal from being hindered.

  Furthermore, by detecting the thermal load based on the elapsed time that the compressor continues to operate continuously from the start of operation, it is possible to omit the additional equipment of the sensor for detecting the thermal load of the cooling terminal.

According to the second invention , an appropriate cooling contrast temperature can be set for various magnitudes of the thermal load of the cooling terminal.

  In the second aspect of the present invention, the contrast temperature update unit is configured to perform the cooling operation when the compressor continues to operate after the elapsed time measured by the elapsed time measurement unit reaches the predetermined reference time. It is preferable to update the cooling contrast temperature so that the contrast temperature is lower than before the update.

  According to this configuration, when the heat (heat absorption) supply flow rate to the cooling terminal by the load-side heat medium is insufficient, it is possible to cope with the problem by lowering the forward-side temperature of the load-side heat medium.

1st and 2nd invention WHEREIN: The mode switching part which switches a normal mode and the power saving mode used as a power saving operation rather than this normal mode according to a user's selection operation is provided, The said contrast temperature update part is in the said normal mode. together with the fixing the heating versus temperature or the cooling for comparing the temperature to a user-specified temperature, in the power saving mode, sets the user-specified temperature to the initial value of the heating versus temperature or the cooling for comparing the temperature, the it is preferred that the heating versus temperature or the cooling for comparing the temperature is updated on a continuous operating time from the operation starting time of the compressor.

According to this configuration, the user can fix the heating contrast temperature or the cooling contrast temperature to the user-specified temperature and guarantee a sufficient operation of the compressor when the load is large, and the heating contrast temperature or It is possible to select a power saving mode in which the cooling contrast temperature is updated according to the heat load to save power.
A heat pump heat source apparatus according to a third aspect of the invention is arranged in a heat collection side circulation passage through which a heat collection side heat medium circulates, a load side circulation passage through which a load side heat medium circulates through a heating terminal, and the heat collection side circulation passage. The heat collection side heat exchanger provided, the load side heat exchanger disposed in the load side circulation passage, and the refrigerant circulation between the heat collection side heat exchanger and the load side heat exchanger A heat pump unit that performs heat transfer; a compressor that is disposed in the heat pump unit and controls circulation of the refrigerant in the heat pump unit; and a load side that is disposed in the load side circulation passage and circulates the load side heat medium. A circulation pump, a temperature detector disposed in the load-side circulation passage and detecting a temperature of a forward heat medium heading toward the heating terminal, and heating equal to or higher than the heating contrast temperature with respect to a predetermined heating contrast temperature Operation end temperature for heating and less than the contrast temperature for heating A heating operation start temperature is set, and the temperature detection by the temperature detector is monitored while the load-side circulation pump is operated. When the detected temperature becomes higher than the heating operation end temperature, the compressor is operated. When the detection temperature is lower than the heating operation start temperature, a compressor control unit that starts operating the compressor, an elapsed time measurement unit that measures an elapsed time from the operation start time of the compressor, If the compressor is stopped before the elapsed time measured by the elapsed time measuring unit reaches a predetermined reference time, the heating contrast temperature is updated so that the heating contrast temperature is lower than before the update. A contrast temperature update unit, and a mode switching unit that switches between a normal mode and a power saving mode that is a power saving operation than the normal mode according to a user's selection operation, the contrast temperature update unit, In the normal mode, the heating contrast temperature is fixed to a user-specified temperature. In the power saving mode, the user-specified temperature is set to an initial value of the heating contrast temperature, and the heating contrast temperature is set to the compressor. It updates based on the continuous operation time from the operation start time.
A heat pump heat source apparatus according to a fourth aspect of the invention is arranged in a heat collection side circulation passage through which a heat collection side heat medium circulates, a load side circulation passage through which a load side heat medium circulates through a cooling terminal, and the heat collection side circulation passage. The heat collection side heat exchanger provided, the load side heat exchanger disposed in the load side circulation passage, and the refrigerant circulation between the heat collection side heat exchanger and the load side heat exchanger A heat pump unit that performs heat transfer; a compressor that is disposed in the heat pump unit and controls circulation of the refrigerant in the heat pump unit; and a load side that is disposed in the load side circulation passage and circulates the load side heat medium. A circulation pump, a temperature detector disposed in the load-side circulation passage and detecting the temperature of the forward heat medium toward the cooling terminal, and a cooling higher than the cooling contrast temperature with respect to a predetermined cooling contrast temperature Less than the cooling start temperature and the cooling contrast temperature The cooling operation end temperature is set, and the temperature detected by the temperature detector is monitored while operating the load-side circulation pump. When the detected temperature becomes lower than the cooling operation end temperature, the compressor is operated. When the detected temperature becomes higher than the cooling operation start temperature, a compressor control unit that starts operating the compressor, an elapsed time measurement unit that measures an elapsed time from the operation start time of the compressor, If the compressor stops before the elapsed time measured by the elapsed time measuring unit reaches a predetermined reference time, the cooling contrast temperature is updated so that the cooling contrast temperature becomes higher than before the update. A contrast temperature update unit, and a mode switching unit that switches between a normal mode and a power saving mode that is a power saving operation than the normal mode according to a user's selection operation, the contrast temperature update unit, In the normal mode, the cooling contrast temperature is fixed to a user specified temperature. In the power saving mode, the user specified temperature is set to an initial value of the cooling contrast temperature, and the cooling contrast temperature is set to the compressor. It updates based on the continuous operation time from the operation start time.

The block diagram of the whole heat pump type air conditioning system. Detailed view of heat pump heat source machine. The flowchart of the routine which controls the rotational speed of a compressor. The flowchart of the 1st part of contrast temperature update routine. The flowchart of the 2nd part of contrast temperature update routine.

  With reference to FIG. 1, an example of the heat pump type air conditioning system 1 is demonstrated roughly. FIG. 1 shows an example in which a heat pump type air conditioning system 1 is used in a general household.

  The heat pump type air conditioning system 1 includes a heat pump heat source unit 2 arranged outside the room, a fan coil unit 6 and a floor heating panel arranged in each room 5 (referred to as “room 5” when the rooms 5a and 5b are not distinguished). 8. The fan coil unit 6 is used for both a heating terminal and a cooling terminal, and the floor heating panel 8 is dedicated to the heating terminal.

  The heat pump heat source device 2 is operated by a user operation from the heat pump remote controller 3. The fan coil unit 6 is operated by a user operation from the wireless dedicated remote controller 7. Each floor heating panel 8 is operated by a user operation from a floor heating controller 9 attached to the wall of each room 5.

  The outgoing line 15 connects the heat pump heat source device 2 and the header 11, and guides water from the heat pump heat source device 2 to the header 11 as an outgoing heat medium on the load side. The return pipe line 16 is connected to the heat pump heat source device 2 and the header 12, and guides water from the header 12 to the heat pump heat source device 2 as a load side return side heat medium.

  The header 11 includes a plurality of branch ports connected in common to the outgoing pipeline 15. Each branch port is individually connected to the heat medium inlet of the terminal of the fan coil unit 6 or the floor heating panel 8 in each room 5. The thermal valve 19 is provided at each branch port of the header 11 and controls opening and closing of each branch port.

  The header 12 includes a plurality of branch ports connected in common to the return pipeline 16. Each branch port is individually connected to the heat medium outlet of the terminal of the fan coil unit 6 or the floor heating panel 8 in each room 5. In the header 12, a thermistor 20 is provided at a branch port connected to the floor heating panel 8 of each room 5, and detects the temperature of water returning from each floor heating panel 8. The thermistor corresponding to the fan coil unit 6 is arranged not in the header 12 but in the main body of the fan coil unit 6.

  A controller (not shown) in the main body of the fan coil unit 6 rotates the blower in the main body so that the room temperature detected by the thermistor in the main body becomes the user-specified temperature specified by the user via the dedicated remote controller 7. Controls the speed and opening and closing of the thermal valve 19 of the header 11. The floor heating controller 9 of the floor heating panel 8 controls the opening and closing of the thermal valve 19 of the header 11 so that the temperature detected by the thermistor 20 becomes the user specified temperature specified by the user in the floor heating controller 9.

  Note that the user specified temperature by the user operation in the dedicated remote controller 7 or the floor heating controller 9 and the user specified temperature by the user operation in the heat pump remote controller 3 are different.

  In the fan coil unit 6 or the floor heating panel 8 in which the corresponding thermal valve 19 is open, the water from the heat pump heat source unit 2 is supplied from the heat pump heat source unit 2, the forward pipeline 15, the header 11, and the fan coil unit 6. Alternatively, the floor heating panel 8, the header 12, and the return line 16 are circulated in order.

  The drain pipe 21 discharges the dew condensation water generated in the heat exchanger in the fan coil unit 6 during cooling or dry operation to the outside. The drain pipe 26 discharges the dew condensation water generated in the water tanks 43 and 54 (FIG. 2) in the heat pump heat source unit 2 to the outside.

  The underground heat exchanger 24 is, for example, a U tube type in which two upper ends are connected to the heat pump heat source unit 2 and the lower ends are lowered until reaching a sufficient depth in the ground. In addition, as a heat collection source of the heat pump heat source machine 2, in addition to using the underground heat of soil deep underground by the U tube method, the heat of groundwater at a predetermined depth or the atmospheric heat of the ground can also be used. . The strainer 25 is disposed in a pipe line connecting the heat pump heat source apparatus 2 and the underground heat exchanger 24, and removes foreign matters contained in water as a heat collection side heat medium circulating in the pipe line.

  FIG. 2 is a detailed view of the heat pump heat source device 2. The heat pump heat source device 2 includes a heat pump unit 30, a heat collection side portion 31, and a load side portion 32. In FIG. 2, the c1-c1 line and the c2-c2 line are drawn for the convenience of explanation for dividing the heat pump unit 30, the heat collecting side portion 31, and the load side portion 32. The c1-c1 line divides the inside of the heat pump heat source machine 2 into the heat pump part 30 and the heat collecting side part 31, and the c2-c2 line divides the inside of the heat pump heat source machine 2 into the heat pump part 30 and the load side part 32. ing.

  In the heat pump heat source machine 2, water is used as a heat medium for the heat collecting side portion 31 and the load side portion 32. Water as a heat medium contains an antifreezing agent to prevent freezing in winter.

  In the heat collecting side portion 31, the circulation passage portion 35 is connected to the underground heat exchanger 24 via return side connection ports 38 and forward side connection ports 39 at both ends. The circulation passage portion 35 and the underground heat exchanger 24 constitute a circulation passage for the heat-collecting-side circulating water. The communication pipe 46 communicates the return side connection port 38 and the forward side connection port 39, and ensures the circulation of water in the circulation passage portion 35 even when the flow on the underground heat exchanger 24 side deteriorates.

  In the circulation passage portion 35, a water tank 43, a heat collection side circulation pump 44, and a heat exchanger 45 are arranged in the order of the flow of the circulating water from the return side connection port 38. The thermistor 40 is disposed in the circulation passage portion 35 in the vicinity of the junction of the circulating water from the return side connection port 38 and the communication pipe 46, and detects the temperature of the return side circulating water. The water tank 43 stores a predetermined amount of return side circulating water from the underground heat exchanger 24. When the water in the water tank 43 expands until the water in the water tank 43 overflows, the drain pipe 47 discharges the overflowing water from the top of the water tank 43 to the outside.

  The heat collection side circulation pump 44 sucks the circulating water from the water tank 43 and pumps it to the heat exchanger 45. F1 indicates the flow direction of the circulating water in the heat exchanger 45. The circulating water in the circulation passage portion 35 and the refrigerant of the heat pump unit 30 exchange heat in the heat exchanger 45.

  In the load side portion 32, the circulation passage portion 50 is connected to the return pipeline 16 and the forward pipeline 15 via the return side connection port 51 and the forward side connection port 52 at both ends, respectively. The communication pipe 57 communicates the return side connection port 51 and the outgoing side connection port 52, and ensures circulation of the circulating water in the circulation passage portion 50 even when the flow rate of the circulating water to the outgoing line 15 decreases. .

  In the circulation passage portion 50, a heat exchanger 53, a water tank 54, and a load-side circulation pump 55 are arranged in the order of flow of the circulating water from the return side connection port 51. The thermistor 56 is provided at a portion of the circulation passage portion 50 before the circulating water from the load-side circulation pump 55 is branched to the communication pipe 57, and detects the temperature of the circulating water at the portion as the temperature of the outgoing heat medium.

  In the heat exchanger 53, F2 indicates the flow direction of the circulating water in the heat exchanger 53. The circulating water in the circulation passage portion 50 and the refrigerant in the heat pump unit 30 exchange heat in the heat exchanger 53.

  The water tank 54 stores a predetermined amount of circulating water coming out of the heat exchanger 53. The drain pipe 58 discharges the overflowing water from the top of the water tank 54 when the water in the water tank 54 expands until the water overflows. The load-side circulation pump 55 sucks the circulating water from the water tank 54 and discharges it toward the forward connection port 52.

  The heat pump unit 30 includes heat exchangers 45 and 53, a switching side passage 61, an expansion side passage 62, a four-way valve 63, a compressor 64 and an expansion valve 65. The heat exchangers 45 and 53, the switching-side passage 61 and the expansion-side passage 62 constitute a refrigerant circulation passage in the heat pump unit 30.

  The four-way valve 63 is disposed in the switching side passage 61 and switches connection between the suction side and the discharge side of the compressor 64 and the heat exchangers 45 and 53. The suction side and the discharge side of the compressor 64 are connected to the heat exchangers 45 and 53, respectively, at the time of heating by switching in the four-way valve 63, and are connected to the heat exchangers 53, 45 at the time of cooling, respectively. The expansion valve 65 is disposed in the expansion side passage 62, adiabatically expands the refrigerant on the upstream side, and outputs it to the downstream side.

  In the heat exchangers 45 and 53, Fw (solid line) indicates the flow direction of the refrigerant during heating, and Fc (broken line) indicates the flow direction of the refrigerant during cooling. The heat exchangers 45 and 53 function as an evaporator and a condenser during heating, respectively, and function as a condenser and an evaporator during cooling, respectively.

  The control board 70 controls the drive of the heat collection side circulation pump 44 and the load side circulation pump 55 and the switching position of the four-way valve 63 based on the instruction signal from the heat pump remote controller 3 and the detection signals of the thermistors 40 and 56.

  The control board 70 includes a compressor control unit 75, an elapsed time measurement unit 76, and a contrast temperature update unit 77. The compressor control unit 75, the elapsed time measurement unit 76, and the contrast temperature update unit 77 are functional units that are realized when a microprocessor (not shown) provided in the control board 70 executes a predetermined program. The compressor control unit 75 controls the operation, stop, and rotation speed of the compressor 64 via the inverter of the inverter board 71.

  A routine for controlling the rotational speed of the compressor 64 will be described with reference to FIG. The compressor rotation speed control routine is executed as a program in the microprocessor of the control board 70. The compressor rotation speed control routine is, for example, an interrupt routine executed by interrupting the main routine at regular time intervals.

  Although the normal mode and the eco mode will be described later, the compressor rotation speed control routine of FIG. 3 assumes that the user has selected the normal mode. In the compressor rotation speed control routine when the user has selected the eco mode, the “user specified temperature” in FIG. 3 is merely replaced with the “contrast temperature”. There are two types of contrast temperatures: a heating contrast temperature and a cooling contrast temperature.

  Prior to the description of STEP 1, the basic operation of the heat pump heat source device 2 will be described. The underground in which the underground heat exchanger 24 (FIG. 1) is buried is maintained at almost the same temperature throughout the year, and becomes a heat supply source in the winter and a heat absorption source in the summer. The heat pump heat source unit 2 is used for both cooling and heating, and the flow of refrigerant in the heat pump unit 30 is reversed during heating and cooling, and the direction of heat transfer between the heat collecting side portion 31 and the load side portion 32 is reversed. become.

  The user designates the user-specified temperature of the outgoing water of the load side portion 32 via the heat pump remote controller 3 both during heating and during cooling.

  In STEP1, the compressor control unit 75 checks whether the heat pump heat source unit 2 is in the heating operation or the cooling operation. When the heat pump heat source device 2 is in the heating operation, the compressor control unit 75 advances the process to STEP 2, and when the heat pump heat source device 2 is in the cooling operation, advances the process to STEP 12.

  STEP2 and STEP12 are the execution processes during the heating operation and the cooling operation, respectively, but the determination contents are the same, and only the processing destination for the determination result is different.

  The compressor control unit 75 compares the temperature detected by the thermistor 56 with the user-specified temperature in both STEP2 and STEP12. When the compressor controller 75 determines that the detected temperature of the thermistor 56 <the temperature specified by the user, the detected temperature of the thermistor 56 = the specified temperature of the thermistor, and the detected temperature of the thermistor 56> the specified temperature of the user, the processing destination is determined in STEP2. STEP3, end, and STEP13, respectively, and STEP12, STEP13, end, and STEP3, respectively.

  That is, the detected temperature of the thermistor 56 <the temperature specified by the user means that the output of the heat pump heat source unit 2 is insufficient during heating with respect to the heat demand of the load, and is surplus during cooling. Means that

  A load is distinguished from a thermal load. The load of the heat pump heat source device 2 is the amount of heat consumed by a single or multiple air conditioning terminals per unit time at each time point. As described above, the heat load of the air conditioning terminal is the amount of heat required to maintain a predetermined temperature in the room where the air conditioning terminal is installed, and is related to the size of the room, the outside air temperature, etc. It is almost equal to the heat capacity of the room considering the amount of heat to escape.)

  Further, the detection temperature of the thermistor 56> the user-specified temperature means that the output of the heat pump heat source unit 2 is excessive during heating with respect to the heat demand of the load, and is insufficient during cooling. Means that The detected temperature of the thermistor 56 = the temperature specified by the user means that the output of the heat pump heat source device 2 and the load are almost balanced.

  When the output of the heat pump heat source unit 2 is insufficient with respect to the heat demand of the load, the compressor control unit 75 increases the rotational speed of the compressor 64 and increases the output of the heat pump heat source unit 2. Executes STEP3 to STEP5.

  On the other hand, when the output of the heat pump heat source machine 2 is surplus with respect to the heat demand of the load, in order to decrease the output speed of the heat pump heat source machine 2 by lowering the rotational speed of the compressor 64, The compressor control unit 75 executes STEP13 to STEP15. When the output of the heat pump heat source device 2 and the load are balanced, the compressor rotational speed control routine is terminated without changing the rotational speed of the compressor 64.

  In STEP 3, the compressor control unit 75 increases the rotational speed of the compressor 64 by a predetermined amount Δ. In STEP 13, the compressor controller 75 lowers the rotational speed of the compressor 64 by a predetermined amount Δ.

  STEPs 4 and 5 are processes for setting the rotational speed of the compressor 64 to be equal to or lower than the upper limit rotational speed. STEPs 14 and 15 are processes for setting the rotational speed of the compressor 64 to be equal to or higher than the lower limit rotational speed.

  In STEP 4, the compressor control unit 75 determines whether or not the rotational speed of the compressor 64 updated in STEP 3 is higher than the upper limit rotational speed. If the rotational speed is equal to or lower than the upper limit rotational speed, the compressor rotational speed control routine is terminated. If it is higher than the upper limit rotation speed, the rotation speed of the compressor 64 is set to the upper limit rotation speed in STEP5.

  In STEP 14, the compressor control unit 75 determines whether or not the rotation speed of the compressor 64 updated in STEP 13 is lower than the lower limit rotation speed. If the rotation speed is equal to or higher than the lower limit rotation speed, the compressor rotation speed control routine is terminated. If the rotation speed is lower than the lower limit rotation speed, the rotation speed of the compressor 64 is set to the lower limit rotation speed in STEP15.

The compressor control unit 75 immediately stops the compressor 64 when any one of the following conditions is satisfied.
(A1) When the compressor 64 is continuously operated at a lower limit rotational speed (example: 1800 rpm) for a predetermined time (example: 10 minutes).
(A2) During heating, when the detected temperature of the thermistor 56> the temperature specified by the user + 5 ° C. while the compressor 64 is operating at the lower limit rotational speed.
(A3) During cooling, when the detected temperature of the thermistor 56 <the temperature specified by the user−5 ° C. while the compressor 64 is operating at the lower limit rotational speed.

The compressor control unit 75 immediately restarts the operation (rotation) of the compressor 64 when any one of the following conditions is satisfied during the stop period of the compressor 64.
(B1) During heating, when the detected temperature of the thermistor 56 <the temperature specified by the user−5 ° C.
(B2) During cooling, when the detected temperature of the thermistor 56 is greater than the user specified temperature + 5 ° C.

  Next, the contrast temperature update routine will be described with reference to FIGS. 4 and 5. The contrast temperature update routine is a routine for updating the contrast temperature used when the compressor rotation speed control routine of FIG. 3 is executed in the eco mode. In the compressor rotation speed control routine of FIG. 3, the compressor control unit 75 uses the user-specified temperature in the normal mode, but uses the contrast temperature instead of the user-specified temperature in the eco mode.

  The contrast temperature update routine is a routine for updating the contrast temperature used when the compressor rotation speed control routine of FIG. 3 is executed in the eco mode. In the contrast temperature update routine of FIGS. 4 and 5, the contrast temperature is specifically referred to as “ECO (eco) contrast temperature”. The contrast temperature update routine is executed as a program in the microprocessor of the control board 70 and constitutes a part of the main routine.

  The main routine relates to ON (ON) and OFF (OFF) of the operation switch in the heat pump remote controller 3 during the period when the heat pump heat source unit 2 is connected to the commercial power supply via the power plug, that is, during the period when the power is on. Rather, it is executed cyclically. Therefore, the contrast temperature update routine is repeatedly executed intermittently and without delay as the main routine is repeatedly executed.

  In the contrast temperature update routine, the initial value of the ECO contrast temperature is set to the user-specified temperature.

  In STEP 21, the contrast temperature update unit 77 checks whether the operation switch of the heat pump heat source unit 2 is on (ON) or off (OFF). On / off of the operation switch of the heat pump heat source unit 2 is different from on / off of the power source of the heat pump heat source unit 2. The operation switch of the heat pump heat source device 2 is provided in the heat pump remote controller 3, and is turned on when the user uses the heat pump heat source device 2, and is turned off when the user does not use it.

  Therefore, even if the heat pump heat source device 2 is connected to a commercial power source and is supplied with power from the commercial power source, the operation switch may be turned off. Even during the period when the operation switch is off, the heat pump heat source unit 2 is ensured to supply power from the commercial power source, and some elements on the control board 70 are in an operating state, and a part of the main routine. Has been implemented.

  When the contrast temperature update unit 77 determines in STEP 21 that the operation switch is ON, the contrast temperature update unit 77 advances the process to STEP 22, and determines that the operation switch is OFF and returns the process to the main routine. Strictly speaking, the process proceeds to the next STEP set after execution of the contrast temperature update routine in the main routine.

  Turning on the operation switch in the heat pump heat source device 2 also serves to reset (turn off) the error flag. The control board 70 executes in parallel an error determination routine for determining whether or not a predetermined element of the heat pump heat source unit 2 is operating normally, separately from the contrast temperature update routine of FIGS. 4 and 5. When an error (abnormality) is found by the error determination routine, the control board 70 including the contrast temperature update unit 77 forcibly stops the operation of the heat pump heat source unit 2 and an error flag corresponding to the error Set (turn on). When the user instructs the operation switch to be turned on from the heat pump remote controller 3, the predetermined error flag is reset, and the operation of the heat pump heat source unit 2 can be resumed.

  In STEP 22, the contrast temperature update unit 77 checks the operation mode of the heat pump heat source unit 2. When the contrast temperature update unit 77 determines that the heat pump heat source unit 2 is in the eco mode, the process proceeds to STEP 23. When the contrast temperature update unit 77 determines that the heat pump heat source unit 2 is in the normal mode, the process proceeds to STEP 24.

  For the operation of the heat pump heat source device 2, a normal mode and an eco mode (power saving mode) are set. The selection operation between the normal mode and the eco mode is performed by a user operation in a mode switching unit (not shown) of the heat pump remote controller 3. The normal mode is an operation mode in which the capability of the heat pump heat source device 2 is not limited.

  On the other hand, the eco mode is an operation mode in which a part of the capacity of the heat pump heat source device 2 is limited or reduced to perform a power saving operation. The partial ability to be limited or reduced is, for example, to reduce the responsiveness of the increase or decrease in the heat supply flow rate of the heat pump heat source unit 2 with respect to fluctuations in the heat demand of the air conditioning terminal.

  In STEP 23, the contrast temperature update unit 77 determines whether the elapsed time since the user specified temperature of the heat pump remote controller 3 is changed by the user is 5 minutes or more or less than 5 minutes. When the contrast temperature update unit 77 determines that the elapsed time is 5 minutes or longer, the process proceeds to STEP 28, and when it is determined that the elapsed time is less than 5 minutes, the process proceeds to STEP 24.

  The significance of STEP23 is that the user may change the designated temperature again within 5 minutes, and after recognizing that the user's designated temperature has been determined, the comparison temperature is updated, and the comparison temperature is useless. This is to avoid update processing.

  In STEP 24, the contrast temperature update unit 77 reads the user specified temperature in the heat pump remote controller 3. The contrast temperature update unit 77 returns the processing to the main routine after STEP24.

  In STEP 28, the contrast temperature update unit 77 checks whether the stop flag is on (ON) or off (OFF). The stop flag stores the operation state in the last (= latest) operation state check of the compressor 64, and in the operation state check (STEP 29, 43, 48) at the previous execution of the contrast temperature update routine. If the operating state of the compressor 64 is stopped, it is on, and if it is operating, it is off. If the stop flag is turned on, the contrast temperature update unit 77 advances the process to STEP 29, and if it is off, skips STEPs 29 and 30 and advances the process to STEP 41.

  In STEP 29, the contrast temperature update unit 77 checks whether the operating state of the compressor 64 is operating or stopped. If it is determined that the operating state is stopped, the process returns to the main routine. If the contrast temperature updating unit 77 determines that the operating state of the compressor 64 is in operation, the contrast temperature updating unit 77 advances the process to STEP 30.

  When STEP 29 is executed, the fact that the operation state of the compressor 64 is in operation means that the operation of the compressor 64 has been resumed. For this reason, the contrast temperature update unit 77 turns off the stop flag in STEP 30. When the stop flag is turned on, it means that the latest judgment about the operating state of the compressor 64 is stopped, and when the stop flag is turned off, the latest judgment about the operating state of the compressor 64 is being operated. Means that.

  In STEP 41 of FIG. 5, the contrast temperature update unit 77 checks whether the continuous operation time of the compressor 64 is 10 minutes or more based on the input from the elapsed time measurement unit 76. The elapsed time measuring unit 76 measures a continuous operation time as an elapsed time in which the compressor 64 continues to operate without stopping from the operation start time. The elapsed time measuring unit 76 is reset when the operation of the compressor 64 ends, and measures the elapsed time again from the next operation start time. The latest continuous operation time of the compressor 64 by the elapsed time measuring unit 76 is stored in a predetermined memory.

  If the continuous operation time of the compressor 64 has reached 10 minutes or more, the contrast temperature update unit 77 advances the process to STEP 42, and if not, advances the process to STEP 48.

  The continuous operation time of the compressor 64 is approximately proportional to the heat load of the heat pump heat source unit 2. The heat load of the air conditioning terminal (heating terminal and cooling terminal) varies depending on the size of the room in which the air conditioning terminal is disposed, the room temperature, the outside air temperature, and the like. That is, the heat load of the air conditioning terminal arranged in a large room is larger than the heat load of the air conditioning terminal arranged in a narrow room, and in the case of heating, the heat load of the air conditioning terminal is lower as the outside air temperature is lower. growing.

  The heat load can also be viewed as the heat capacity at each point in the volume space where the air conditioning terminal performs air conditioning. The heat capacity is affected by external factors such as the outside air temperature separately from the volume space itself.

  When the heat load of the air conditioning terminal is small, the temperature of the room 5 is maintained even if the supply flow rate of heat from the heat pump heat source unit 2 to the air conditioning terminal by the load-side heat medium (heat radiation during heating or heat absorption during cooling) is small. can do.

  In STEP 42, the contrast temperature update unit 77 determines whether the elapsed time after changing the ECO contrast temperature is 5 minutes or more or less than 5 minutes. When the contrast temperature update unit 77 determines that the time is 5 minutes or longer, the process proceeds to STEP 43, and when it is determined that the time is less than 5 minutes, the process returns to the main routine.

  The meaning of STEP42 is that it takes time for the change to appear as a change in the temperature of the circulating water in the load side portion 32 after the ECO contrast temperature is changed. It is intended to stop further changes in the ECO contrast temperature and prevent unnecessary re-changes.

  As a result, it is possible to prevent STEP 42 and STEP 49, which will be described later, from being executed unnecessarily alternately. Further, when STEP 42 is continuously executed, the continuous execution interval of STEP 42 is 5 minutes or more.

  In STEP 43, the contrast temperature update unit 77 checks whether the operating state of the compressor 64 is operating or stopped. If it is in operation, the process proceeds to STEP 44, and if it is stopped, the process proceeds to STEP 50.

  In STEP 44, the contrast temperature update unit 77 increases the ECO contrast temperature by 1 ° C. from before the update during heating, and decreases by 1 ° C. from before the update during cooling. As a result, the ECO contrast temperature approaches the user-specified temperature, and the temperature difference between the user-specified temperature and the temperature detected by the thermistor 56 (the load-side heat medium forward temperature) decreases. Therefore, the heat supply flow rate by the load-side heat medium from the heat pump heat source unit 2 to the air conditioning terminal (the heat supply flow rate during heating or the heat absorption flow rate during cooling) increases.

  Note that if the continuous operation of the compressor 64 has not ended even after 5 minutes or more have elapsed from when the ECO contrast temperature is updated in STEP 44 (YES in both STEPs 41 and 42), the contrast temperature update unit 77 is , STEP 44 is re-executed. When the execution of STEP 42 is continued without alternately executing STEP 42 and STEP 49 described later, that is, every time the operation duration time of the compressor 64 increases by 5 minutes, the ECO contrast temperature is increased during heating. Then, the temperature rises in steps of 1 ° C. as a predetermined amount. Moreover, at the time of cooling, it falls in steps of 1 ° C. as a predetermined amount.

  Regarding the increase in ECO contrast temperature during heating and the decrease during cooling in STEP 44, an upper limit contrast temperature for heating and a lower limit contrast temperature for cooling are set, respectively. Both the upper limit contrast temperature for heating and the lower limit contrast temperature for cooling are set to user-specified temperatures. The increase in the ECO contrast temperature during heating in STEP 44 is updated on condition that the temperature is equal to or lower than the heating upper contrast temperature. Further, the update of the decrease in the ECO contrast temperature during cooling is performed on condition that the temperature is equal to or higher than the cooling lower limit contrast temperature.

  In STEP 48, the contrast temperature update unit 77 checks whether the operating state of the compressor 64 is operating or stopped. If it is in operation, the process returns to the main routine. If it is stopped, the process proceeds to STEP 49.

  In STEP 49, the contrast temperature update unit 77 lowers the ECO contrast temperature by 1 ° C. from before the update during heating, and by 1 ° C. from before the update during cooling. Thereby, the temperature difference between the refrigerant and the load-side heat medium in the heat exchanger 53 increases, and the efficiency of the heat pump increases. As a result, power saving of the heat pump heat source device 2 is performed via power saving of the compressor 64. Moreover, with the increase in efficiency of the heat pump, the repetition frequency of the operation and stop of the compressor 64 decreases, and also from this point, power saving of the heat pump heat source device 2 is achieved.

  On the other hand, when the heat load of the air conditioning terminal is small, even if the supply flow rate of heat by the load side heat medium from the heat pump heat source unit 2 to the air conditioning terminal is small, that is, the temperature of the load side heat medium is somewhat low during heating. However, even when the temperature of the load-side heat medium is somewhat high during cooling, the room 5 can be maintained at the user-specified temperature. Therefore, troubles due to the update of the ECO contrast temperature can be suppressed.

  Regarding the decrease in heating of the ECO contrast temperature and the increase in cooling in STEP 49, a lower limit contrast temperature for heating and an upper limit contrast temperature for cooling are set, respectively. The cooling upper-limit contrast temperature is uniformly 20 ° C. regardless of the user-specified temperature.

  The lower limit contrast temperature for heating is, for example, the lower limit contrast temperature for heating = (user specified temperature−15) × 3/4 + 15 (unit ° C.). According to this equation, the lower limit contrast temperature for heating is 48 ° C. when the user specified temperature = 60 ° C., 32 ° C. when the user specified temperature = 38 ° C., and 15 ° C. when the user specified temperature = 15 ° C. It becomes.

  If the continuous operation of the compressor 64 is completed in less than 10 minutes even when the next operation of the compressor 64 is resumed despite the update of the ECO contrast temperature in STEP 49, STEP 49 is re-executed. As described above, when the execution of STEP 49 is continued without alternately executing STEP 42 and STEP 49, that is, before the elapsed time measured by the elapsed time measuring unit 76 reaches 10 minutes, the compressor 64. When the stoppage occurs continuously, the ECO contrast temperature gradually decreases or rises by 1 ° C. at each stoppage.

  The stepwise update of the ECO contrast temperature in the continuous execution of STEP49 during heating is performed on condition that the temperature is equal to or higher than the lower limit contrast temperature for heating. Further, the step-by-step update of the ECO contrast temperature in the continuous execution of STEP49 during cooling is performed on condition that it is equal to or lower than the cooling upper limit contrast temperature.

  In STEP50, the contrast temperature update unit 77 turns on the stop flag.

  The comparative temperature update routine of FIG. 4 and FIG. 5 can omit the additional equipment of the sensor for detecting the thermal load by detecting the thermal load based on the continuous operation time of the compressor 64.

  The invention has been described with reference to embodiments. The circulation passage portion 35 is an example of a portion of the heat collection side circulation passage through which water as the heat collection side heat medium circulates. The circulation passage portion 50 is an example of a load-side circulation passage through which the load-side heat medium circulates through the heating terminal or the cooling terminal. The heat exchanger 45 is an example of a heat collection side heat exchanger.

  The heat exchanger 53 is an example of a load side heat exchanger. The thermistor 56 is an example of a temperature detector that is disposed in the load-side circulation passage and detects the temperature of the outgoing heat medium that goes to the heating terminal or the cooling terminal.

  The compressor control unit 75 is an example of a compressor control unit that monitors the temperature detected by the temperature detector while operating the load-side circulation pump.

  The ECO contrast temperature during heating in FIG. 5 is an example of a predetermined heating contrast temperature. The ECO contrast temperature during cooling in FIG. 5 is an example of a predetermined cooling contrast temperature.

  The fan coil unit 6 of the embodiment is an example of an air conditioning terminal for both cooling and heating. The floor heating panel 8 of the embodiment is an example of a dedicated heating terminal machine. The present invention is also applicable to a cooling terminal dedicated machine.

  “User-specified temperature (ECO contrast temperature in the eco mode) + 5 ° C.” in the above-described condition (a2) is an example of the heating operation end temperature equal to or higher than the heating contrast temperature. “User-specified temperature (ECO contrast temperature in eco mode) −5 ° C.” in the condition (a3) is an example of the cooling operation end temperature lower than the cooling contrast temperature.

  “User-specified temperature (ECO contrast temperature in the eco mode) −5 ° C.” in the condition (b1) described above is an example of the heating operation start temperature lower than the heating contrast temperature. “User-specified temperature (ECO contrast temperature in the eco mode) + 5 ° C.” in the condition (b2) is an example of the cooling operation start temperature that is equal to or higher than the cooling contrast temperature.

  “10 minutes” of STEP 41 in FIG. 5 is an example of a predetermined reference time of the present invention. The predetermined reference time of the present invention may be set to a time different from “10 minutes”.

  The increase or decrease in the ECO contrast temperature by 1 ° C. in STEP 44 in FIG. 5 is a stepwise increase in the comparison temperature for heating or the comparison temperature for cooling when the continuous operation time of the compressor continuously exceeds the reference time. It is an example of a simple update. These gradual updates can be values other than 1 ° C.

  The decrease or increase of the ECO contrast temperature by 1 ° C. in STEP 49 of FIG. 5 is a stepwise increase in the heating contrast ratio or the cooling contrast temperature when the continuous operation time of the compressor does not reach the reference time continuously. It is an example of a simple update. These gradual updates can be values other than 1 ° C.

  Although the initial value of the ECO contrast temperature as the contrast temperature in the power saving mode of the present invention is set to the user-specified temperature in the embodiment, it is not limited to this. In the embodiment, the contrast temperature in the normal mode of the present invention is fixed at the user-specified temperature, but can be fixed at a predetermined temperature other than the user-specified temperature.

2 ... heat pump heat source machine, 6 ... fan coil unit (heater or air conditioner), 8 ... floor heating panel (heating terminal), 35 ... circulation passage part (heat collection side circulation passage), 45... Heat exchanger (heat collection side heat exchanger), 50... Circulation path portion (load side circulation path), 53... Heat exchanger (load side heat exchanger), 56. (Temperature detector), 64... Compressor, 75... Compressor control unit, 76... Elapsed time measurement unit, 77.

Claims (7)

A heat collection side circulation passage through which the heat collection side heat medium circulates;
A load-side circulation passage through which the load-side heat medium circulates through the heating terminal;
A heat collecting side heat exchanger disposed in the heat collecting side circulation passage;
A load-side heat exchanger disposed in the load-side circulation passage;
A heat pump unit that performs heat transfer by circulation of refrigerant between the heat collection side heat exchanger and the load side heat exchanger;
A compressor that is disposed in the heat pump unit and controls circulation of the refrigerant in the heat pump unit;
A load-side circulation pump that is disposed in the load-side circulation passage and circulates the load-side heat medium;
A temperature detector that is disposed in the load-side circulation passage and detects a temperature of a forward-side heat medium toward the heating terminal;
Setting a heating operation end temperature equal to or higher than the heating contrast temperature and a heating operation start temperature lower than the heating contrast temperature for a predetermined heating contrast temperature, while operating the load-side circulation pump, The temperature detected by the temperature detector is monitored, and when the detected temperature is higher than the heating operation end temperature, the compressor is ended.When the detected temperature is lower than the heating operation start temperature, the compressor is A compressor controller to start operation;
An elapsed time measuring unit that measures an elapsed time from the operation start time of the compressor;
If the compressor is stopped before the elapsed time measured by the elapsed time measuring unit reaches a predetermined reference time, the heating contrast temperature is updated so that the heating contrast temperature is lower than before the update. A contrast temperature update unit ,
In the case where the compressor is continuously stopped before the elapsed time due to the measurement by the elapsed time measuring unit reaches the predetermined reference time, the contrast temperature update unit, for each stop, The heat pump heat source apparatus , wherein the heating contrast temperature is updated so that the heating contrast temperature is lowered stepwise . In the heat pump heat source machine according to claim 1 ,
When the compressor continues to operate after the elapsed time measured by the elapsed time measurement unit reaches the predetermined reference time, the heating temperature comparison temperature is not updated. The heat pump heat source machine, wherein the heating contrast temperature is updated so as to be higher. A heat collection side circulation passage through which the heat collection side heat medium circulates;
A load-side circulation passage through which the load-side heat medium circulates through the cooling terminal;
A heat collecting side heat exchanger disposed in the heat collecting side circulation passage;
A load-side heat exchanger disposed in the load-side circulation passage;
A heat pump unit that performs heat transfer by circulation of refrigerant between the heat collection side heat exchanger and the load side heat exchanger;
A compressor that is disposed in the heat pump unit and controls circulation of the refrigerant in the heat pump unit;
A load-side circulation pump that is disposed in the load-side circulation passage and circulates the load-side heat medium;
A temperature detector that is disposed in the load-side circulation passage and detects a temperature of a forward heat medium toward the cooling terminal;
Setting a cooling operation start temperature that is equal to or higher than the cooling contrast temperature and a cooling operation end temperature that is less than the cooling contrast temperature with respect to a predetermined cooling contrast temperature, while operating the load-side circulation pump, The temperature detected by the temperature detector is monitored. When the detected temperature becomes lower than the cooling operation end temperature, the compressor is ended.When the detected temperature becomes higher than the cooling operation start temperature, the compressor is turned off. A compressor controller to start operation;
An elapsed time measuring unit that measures an elapsed time from the operation start time of the compressor;
If the compressor stops before the elapsed time measured by the elapsed time measuring unit reaches a predetermined reference time, the cooling contrast temperature is updated so that the cooling contrast temperature becomes higher than before the update. A contrast temperature update unit ,
The contrast temperature update unit sets the cooling contrast temperature stepwise every time the compressor is stopped before the elapsed time measured by the elapsed time measurement unit reaches the predetermined reference time. The heat pump heat source device is characterized in that the cooling contrast temperature is updated so as to be higher . In the heat pump heat source machine according to claim 3 ,
When the compressor continues to operate after the elapsed time measured by the elapsed time measurement unit reaches the predetermined reference time, the cooling temperature comparison unit is updated before the cooling comparison temperature is updated. The heat pump heat source apparatus, wherein the cooling contrast temperature is updated so as to be lower. In the heat pump heat source machine according to any one of claims 1 to 4 ,
A mode switching unit that switches between a normal mode and a power saving mode that is a power saving operation than the normal mode according to a user's selection operation,
The contrast temperature update unit includes:
Said heating versus temperature or the cooling for comparing temperature was fixed to a user-specified temperature is in the normal mode,
Wherein the power saving mode, and sets the user-specified temperature to the initial value of the heating versus temperature or the cooling for comparing the temperature, the heating versus temperature or the cooling for comparing the temperature from the operation start time of the compressor The heat pump heat source machine is updated based on the continuous operation time of the heat pump.   A heat collection side circulation passage through which the heat collection side heat medium circulates;
  A load-side circulation passage through which the load-side heat medium circulates through the heating terminal;
  A heat collecting side heat exchanger disposed in the heat collecting side circulation passage;
  A load-side heat exchanger disposed in the load-side circulation passage;
  A heat pump unit that performs heat transfer by circulation of refrigerant between the heat collection side heat exchanger and the load side heat exchanger;
  A compressor that is disposed in the heat pump unit and controls circulation of the refrigerant in the heat pump unit;
  A load-side circulation pump that is disposed in the load-side circulation passage and circulates the load-side heat medium;
  A temperature detector that is disposed in the load-side circulation passage and detects a temperature of a forward-side heat medium toward the heating terminal;
  Setting a heating operation end temperature equal to or higher than the heating contrast temperature and a heating operation start temperature lower than the heating contrast temperature for a predetermined heating contrast temperature, while operating the load-side circulation pump, The temperature detected by the temperature detector is monitored, and when the detected temperature is higher than the heating operation end temperature, the compressor is ended.When the detected temperature is lower than the heating operation start temperature, the compressor is A compressor controller to start operation;
  An elapsed time measuring unit that measures an elapsed time from the operation start time of the compressor;
  If the compressor is stopped before the elapsed time measured by the elapsed time measuring unit reaches a predetermined reference time, the heating contrast temperature is updated so that the heating contrast temperature is lower than before the update. A contrast temperature update unit,
  A mode switching unit that switches between a normal mode and a power saving mode that is a power saving operation than the normal mode according to a user's selection operation;
  The contrast temperature update unit includes:
  In the normal mode, the heating contrast temperature is fixed to a user-specified temperature,
  In the power saving mode, the user-specified temperature is set to an initial value of the heating contrast temperature, and the heating contrast temperature is updated based on a continuous operation time from an operation start time of the compressor. Heat pump heat source machine.   A heat collection side circulation passage through which the heat collection side heat medium circulates;
  A load-side circulation passage through which the load-side heat medium circulates through the cooling terminal;
  A heat collecting side heat exchanger disposed in the heat collecting side circulation passage;
  A load-side heat exchanger disposed in the load-side circulation passage;
  A heat pump unit that performs heat transfer by circulation of refrigerant between the heat collection side heat exchanger and the load side heat exchanger;
  A compressor that is disposed in the heat pump unit and controls circulation of the refrigerant in the heat pump unit;
  A load-side circulation pump that is disposed in the load-side circulation passage and circulates the load-side heat medium;
  A temperature detector that is disposed in the load-side circulation passage and detects a temperature of a forward heat medium toward the cooling terminal;
  Setting a cooling operation start temperature that is equal to or higher than the cooling contrast temperature and a cooling operation end temperature that is less than the cooling contrast temperature with respect to a predetermined cooling contrast temperature, while operating the load-side circulation pump, The temperature detected by the temperature detector is monitored. When the detected temperature becomes lower than the cooling operation end temperature, the compressor is ended.When the detected temperature becomes higher than the cooling operation start temperature, the compressor is turned off. A compressor controller to start operation;
  An elapsed time measuring unit that measures an elapsed time from the operation start time of the compressor;
  If the compressor stops before the elapsed time measured by the elapsed time measuring unit reaches a predetermined reference time, the cooling contrast temperature is updated so that the cooling contrast temperature becomes higher than before the update. A contrast temperature update unit,
  A mode switching unit that switches between a normal mode and a power saving mode that is a power saving operation than the normal mode according to a user's selection operation;
  The contrast temperature update unit includes:
  In the normal mode, the cooling contrast temperature is fixed to a user-specified temperature,
  In the power saving mode, the user-specified temperature is set to an initial value of the cooling contrast temperature, and the cooling contrast temperature is updated based on a continuous operation time from an operation start time of the compressor. Heat pump heat source machine.