JP4203084B2 - Washing machine - Google Patents

Description

  The present invention relates to a washing machine including a heat pump as a drying mechanism for drying clothes in a washing tub.

Some of the washing machines are configured to warm tap water stored in the water receiving tank based on heating the water receiving tank with an electric heater. In the case of this configuration, since the water receiving tank is directly heated by the electric heater, there is a problem that the water receiving tank becomes high temperature. Moreover, since the heater is exposed to a humid environment, there is a problem in that each of leakage and short circuit occurs.
Japanese Patent No. 3330789 JP 2006-87484 A

  Each of the above problems uses a heat pump system as a heat source, makes the condenser of the heat pump and the water pipe for injecting tap water into the water receiving tank contact each other, and heats the tap water in the water pipe with the condenser to heat the water in the water receiving tank. It can be solved by injecting into. However, in the case of this configuration, since the heat of the condenser is taken away by the tap water, a new problem that the condenser is difficult to increase in temperature occurs. In particular, when the outside air temperature is a low temperature of about “5 ° C.”, the evaporator easily forms frost, so that the flow of wind to each of the evaporator and the condenser is hindered by the frost. For this reason, since the operating efficiency of the heat pump is greatly reduced, it is more difficult to raise the temperature of the condenser. Generally, it is said that the washing ability of clothes will be sufficiently enhanced by raising the water temperature from room temperature to “5 ° C.”, but “25 L to 30 L” is sufficient if the tap water in the water pipe is simply heated by a condenser. It is difficult to raise the amount of tap water from room temperature to a temperature suitable for washing.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a washing machine capable of raising the water temperature from room temperature to a temperature suitable for washing using a heat pump that generates dry air for clothes. There is.

  The washing machine of the present invention includes a washing tub into which clothes are put, a water receiving tub in which the washing tub is rotatably accommodated, and the air in the water receiving tub in the internal space of the water receiving tub, at each of a start point and an end point. A fan that circulates in one direction, a compressor through which the refrigerant discharged from the compressor flows, and an evaporator through which the refrigerant discharged from the compressor flows through the condenser. A heat pump for heating the circulating air, a water pipe for injecting tap water into the water receiving tank and directly or indirectly in contact with the condenser, and tap water in the water receiving tank Between the first water injection state in which water is injected without passing through the water pipe and the second water injection state in which tap water is injected into the water receiving tank through the water pipe and the water injection stop state in which tap water is not injected into the water receiving tank. A valve mechanism switchable with Each of the wind machine, the compressor, and the valve mechanism is driven and controlled, and tap water is not passed through the water receiving tank based on the valve mechanism being set to the first water injection state. Normal water injection treatment to be injected and hot air to inject hot air into the water receiving tank based on operating each of the blower and the compressor after the normal water injection treatment is stopped or during execution of the normal water injection treatment A hot water injection process for injecting tap water into the water receiving tank through the water pipe based on setting the valve mechanism to the second water injection state after a lapse of time from the start of the injection process and the hot air injection process. It is characterized in that it has a control circuit to perform.

  Based on the valve mechanism being in the first water injection state, normal temperature tap water is injected into the water receiving tank without passing the water pipe. After stopping the normal water injection process or during the execution of the normal water injection process, each of the blower and the compressor is operated, and the tap water in the water receiving tank is heated based on the warm air being injected into the water receiving tank. Is done. In this state, high-humidity air that has absorbed moisture in the water receiving tank is returned from the water receiving tank to the evaporator, and moisture is condensed or condensed based on the latent heat exchange performed in the evaporator. For this reason, even when the outside air temperature is a low temperature of about “5 ° C.”, it is difficult for the evaporator to form a frost. Therefore, it is possible to suppress the flow of wind to each of the evaporator and the condenser from being inhibited by the frost. Therefore, since the fall of the operation efficiency of a heat pump is suppressed, a condenser comes to heat up easily. After a lapse of time from the start of the hot air injection process, the temperature of the condenser is sufficiently higher than that at the start of the hot air injection process, and when the temperature of the condenser becomes sufficiently high, the valve mechanism is Based on switching to the second water injection state, tap water is injected into the water receiving tank through the water pipe. Immediately after the start of this hot water injection process, the tap water in the water pipe is heated up by absorbing the heat capacity of the condenser itself, so high temperature hot water that absorbs the heat capacity of the condenser itself is injected into the water receiving tank. Is done. For this reason, it becomes possible to raise water temperature from normal temperature to the temperature suitable for washing.

<< Example 1 >>
As shown in FIG. 1, a plurality of dampers 2 are housed inside the outer box 1. A water receiving tank 3 is fixed to the rods of the plurality of dampers 2, and the water receiving tank 3 is housed in the outer box 1 through the plurality of dampers 2 in a damping state and a buffered state. The water receiving tank 3 has a bottomed cylindrical shape with a closed rear surface, and is arranged in an inclined state in which the axial center line CL descends from the front to the rear. A stator of the drum motor 4 is fixed to the rear plate of the water receiving tank 3 so as to be located outside the water receiving tank 3. The drum motor 4 is composed of an outer rotor type DC brushless motor in which a rotor is disposed on the outer peripheral portion of the stator, and the rotating shaft of the drum motor 4 projects into the water receiving tank 3.

  A drum 5 is fixed to the rotating shaft of the drum motor 4. The drum 5 corresponds to a washing tub, and rotates integrally with the rotating shaft of the drum motor 4 based on the operation of the drum motor 4. The drum 5 has a bottomed cylindrical shape with a closed rear surface, and is stored concentrically with respect to the water receiving tank 3 inside the water receiving tank 3. The drum 5 is formed with a plurality of through holes 5a located on the peripheral wall portion, and is formed with a plurality of through holes 5b located on the bottom wall portion larger than the through holes 5a. It connects with the internal space of the water receiving tank 3 through each of the through-hole 5a and each through-hole 5b.

  The front plate of the outer box 1 is formed with a through hole-shaped entrance / exit 1a. This entrance / exit 1a is arranged on the extension of the drum 5, and the laundry is put into the drum 5 from the outside of the outer box 1 through the entrance / exit 1a, and the laundry inside the drum 5 is outside through the entrance / exit 1a. It is taken out of the box 1. A door 6 is mounted on the front plate of the outer box 1, and the door 6 is movable between a closed state in which the entrance / exit 1a is closed and an open state in which the entrance / exit 1a is opened.

  As shown in FIG. 1, a water supply valve 7 corresponding to a valve mechanism is accommodated in the outer box 1. The water supply valve 7 has an input port, a normal output port, and a heating output port. As shown in FIG. 2, the input port is connected to a water tap, and the normal output port is connected to a water injection case 9 through a water pipe 8. The heating output port is connected to the water injection case 9 through the water pipe 10. This water supply valve 7 is driven by a water supply valve motor 11 (see FIG. 3) composed of a pulse motor. Between the normal water injection state, the heating water injection state, and the water injection stop state according to the rotation amount of the water supply valve motor 11 Can be switched with.

  The normal water injection state is a state in which each of the input port and the normal output port is opened and the heating output port is closed. This normal water injection state corresponds to the first water injection state. In the normal water injection state, tap water is supplied from the normal output port to the water injection case 9 through the water pipe 8 as shown in FIG. The heating water injection state is a state where each of the input port and the heating output port is opened and the normal output port is closed. This heated water injection state corresponds to the second water injection state. In the hot water injection state, tap water is supplied from the heating output port to the water injection case 9 through the water pipe 10. The water injection stopped state is a state in which the input port is closed, and tap water is not supplied to the water injection case 9 in the water injection stopped state. As shown in FIG. 1, the water injection case 9 is housed in the outer box 1 at a position higher than the water tank 3, and is supplied to the water injection case 9 from the normal output port of the water supply valve 7. The tap water and the tap water supplied to the water injection case 9 from the heating output port of the water supply valve 7 are respectively injected into the water tank 3 from the water injection case 9.

  As shown in FIG. 1, a drain pipe 12 is connected to the water receiving tank 3, and a drain valve 13 is interposed in the drain pipe 12. This drain valve 13 is driven by a drain valve solenoid 14 (see FIG. 3) comprising an electromagnetic solenoid, and is closed so that the water in the water receiving tank 3 cannot be drained when the drain valve solenoid 14 is turned off. It becomes a state, and it will be in the open state which can discharge the water in the water receiving tank 3 based on the drain valve solenoid 14 being turned on. As shown in FIG. 2, a drain outlet 15 is connected to the drain pipe 12. When the drain valve 13 is open, water in the water receiving tank 3 is discharged from the drain pipe 12 to the outside through the drain outlet 15. The

  As shown in FIG. 1, a main duct 16 is housed inside the outer box 1 so as to be positioned below the water receiving tank 3. The main duct 16 extends straight in the front-rear direction. The lower end of the front duct 17 is connected to the front end of the main duct 16, and the lower end of the rear duct 18 is connected to the rear end of the main duct 16. Has been. The upper end portion of the rear duct 18 is connected to the water receiving tank 3 from the rear, and the upper end portion of the front duct 17 is connected to the water receiving tank 3 from the front, so that the main duct 16, the front duct 17, and the rear duct 18 are connected. The member forms a closed loop-shaped circulation air passage 19 having an internal space of the drum 5 as a start point and an end point, respectively.

  As shown in FIG. 1, a fan 20 is housed inside the main duct 16 at the rear end, and the fan 20 is connected to a rotation shaft of a fan motor 21. The fan motor 21 is disposed outside the circulation air passage 19, and during operation of the fan motor 21, the inside air of the drum 5 flows from the inside of the front duct 17 to the main duct 16 as indicated by an arrow in FIG. 1. After flowing through the inside of the main duct 16 from the front to the rear, it returns to the inside of the drum 5 through the inside of the rear duct 18. The fan motor 21 is composed of a DC brushless motor capable of speed control, and the flow rate of air circulating inside the circulation air passage 19 can be adjusted based on speed control of the fan motor 21. The fan motor 21 and the fan 20 constitute a fan device 41, and the fan device 41 corresponds to a blower.

  As shown in FIG. 1, the main duct 16 contains a dividing capacitor 22 positioned immediately before the fan 20, and an evaporator 23 positioned in front of the dividing capacitor 22. In this operating state, the inside air of the drum 5 is supplied to the dividing capacitor 22 via the evaporator 23. The evaporator 23 and the split capacitor 22 are connected in series between the discharge port and the suction port of the compressor 24 as shown in FIG. As shown in FIG. 1, the compressor 24 is housed inside the outer box 1 so as to be located outside the circulation air passage 19, and operates using a compressor motor 25 (see FIG. 3) as a drive source. The compressor motor 25 is composed of a DC brushless motor capable of speed control, and the flow rate of the refrigerant discharged from the compressor 24 can be adjusted based on speed control of the compressor motor 25. The compressor 24 corresponds to a compressor, and the evaporator 23 corresponds to an evaporator.

  As shown in FIG. 2, a split capacitor 26 is accommodated inside the outer box 1 so as to be located outside the circulation air passage 19. This divided capacitor 26 is of a plate fin type, and is constituted by joining each of a plurality of radiating fins in contact with one meandering refrigerant pipe 27 (see FIG. 4). The dividing capacitor 26 constitutes a condenser 42 (see FIG. 2) corresponding to the condenser together with the dividing capacitor 22, and the refrigerant pipe 27 of the dividing capacitor 26 includes the dividing capacitor 22 and the evaporator 23 as shown in FIG. Connected between each other. As shown in FIG. 4, the water pipe 10 is joined (soldered) in parallel to the refrigerant pipe 27 of the split condenser 26 so that the refrigerant flowing through the refrigerant pipe 27 and the tap water flowing through the water pipe 10 are mutually connected. Heat exchange is possible. That is, the water pipe 10 is piped so as to be in direct contact with the capacitor 42, and the water pipe 8 is piped in a non-contact state with respect to the capacitor 42.

  As shown in FIG. 2, an electronic expansion valve 28 is interposed between the evaporator 23 and the split capacitor 26. The electronic expansion valve 28 changes the volume of the refrigerant by depressurizing the refrigerant, and has an expansion valve motor 29 (see FIG. 3). The expansion valve motor 29 is composed of a position-controllable pulse motor, and the opening degree of the electronic expansion valve 28 is adjusted according to the rotation amount of the expansion valve motor 29.

  As shown in FIG. 2, a bypass valve 30 is housed inside the outer box 1 so as to be located outside the circulation air passage 19. This bypass valve 30 is driven by a bypass valve solenoid 31 (see FIG. 3) made of an electromagnetic solenoid, and can be switched between an open state and a closed state. As shown in FIG. 2, the bypass valve 30 is connected in parallel to the dividing capacitor 22, and a normal path for flowing the refrigerant to the dividing capacitor 26 via the dividing capacitor 22 and the refrigerant to the dividing capacitor 26. Are switched between the bypass paths that bypass the dividing capacitor 22 and flow. The bypass valve 30, the evaporator 23, the compressor 24, the condenser 42, and the electronic expansion valve 28 constitute a heat pump 43.

  As shown in FIG. 1, an operation panel 32 is fixed to the front plate of the outer box 1, and a plurality of switches 33 (see FIG. 3) are mounted on the operation panel 32 so as to be operable from the front. A control circuit 34 (see FIG. 3) mainly composed of a microcomputer is accommodated in the outer box 1. The control circuit 34 includes a CPU, a ROM, a RAM, and a clock circuit. The control circuit 34 sets the operation content according to the operation content of each of the plurality of switches 33, and the drum motor 4 and the water supply according to the operation content setting result. A washing operation including a drying process is automatically executed by driving and controlling the valve motor 11, the drain valve solenoid 14, the fan motor 21, the compressor motor 25, the expansion valve motor 29, and the bypass valve solenoid 31, respectively.

  A pressure sensor 35 (see FIG. 3) is connected to the water receiving tank 3 via an air tube. This air tube transmits the internal pressure of the water receiving tank 3 to the pressure sensor 35, the pressure sensor 35 outputs a pressure signal at a level corresponding to the internal pressure of the water receiving tank 3, and the control circuit 34 receives the pressure signal from the pressure sensor 35. Based on the above, the water level in the water receiving tank 3 is detected. An evaporator temperature sensor 36 (see FIG. 3) is joined to the evaporator 23. The evaporator temperature sensor 36 corresponds to an evaporator temperature sensor, and the control circuit 34 detects the surface temperature of the evaporator 23 based on the temperature signal output from the evaporator temperature sensor 36. A hot air temperature sensor 40 (see FIG. 3) is fixed inside the rear duct 18 at the upper end, and the control circuit 34 is based on the temperature signal output from the hot air temperature sensor 40. The temperature of the wind discharged into the water receiving tank 3 is detected.

  A position sensor 37 (see FIG. 3) is fixed to the stator of the drum motor 4. The position sensor 37 detects the rotor magnet of the drum motor 4 and outputs a position signal. The control circuit 34 detects the rotational speed of the drum motor 4 based on the position signal from the position sensor 37. A position sensor 38 (see FIG. 3) is fixed to the stator of the fan motor 21. The position sensor 38 detects the rotor magnet of the fan motor 21 and outputs a position signal. The control circuit 34 detects the rotational speed of the fan motor 21 based on the position signal from the position sensor 38. A position sensor 39 (see FIG. 3) is fixed to the stator of the comp motor 25. The position sensor 39 detects the rotor magnet of the comp motor 25 and outputs a position signal. The control circuit 34 detects the rotational speed of the comp motor 25 based on the position signal from the position sensor 39.

  FIG. 5 shows the control contents of the control circuit 34 when the hot water washing course is set. This hot water washing course is set by the CPU of the control circuit 34 according to the operation contents of the plurality of switches 33, and the CPU determines whether or not there is an operation start command in step S1 of FIG. 5 in the setting state of the hot water washing course. . This operation start command is determined according to the operation content of the plurality of switches 33. For example, the user puts laundry into the drum 5, puts detergent into the water injection case 9, and turns on the plurality of switches 33 in advance. When operating with the determined content, the CPU determines that there is an operation start command in step S1, and proceeds to step S2.

  When the CPU proceeds to step S2, the CPU determines the weight of the laundry put into the drum 5. The weight of the laundry is detected by detecting the rate of change in the rotational speed of the drum motor 4 by rotating the drum motor 4 in a certain direction for a certain period of time previously recorded in the ROM with a constant power recorded in the ROM. The CPU determines whether the weight is high, medium, or low, and the CPU sets the water level in step S3 when the weight of the laundry is determined in step S2. This water level is set according to the result of determination of the weight of the laundry. When the laundry is heavy, a high water level is set, and when the laundry is medium weight, the medium water level is set. When the weight is low, a low water level is set.

  When the CPU sets the water level in step S3, the drain valve 13 is closed based on turning off the drain valve solenoid 14 in step S4, and the water supply valve 7 is set in a normal water injection state based on driving control of the water supply valve motor 11. To. In this state, tap water is supplied from the water pipe 8 into the water pouring case 9, and tap water is poured into the water tank 3 from the water pouring case 9 together with the detergent in the water pouring case 9 (normal water pouring). This step S4 corresponds to a normal water injection process.

  When the CPU starts the normal water injection process in step S4, the CPU starts the intermittent operation of the drum motor 4 in step S5. In this intermittent operation, the drum motor 4 is rotated at a constant rotational speed in a constant rotational direction for a predetermined time period at a constant time interval. Tap water containing detergent is poured evenly.

  When starting the intermittent operation of the drum motor 4 in step S5, the CPU proceeds to step S6. Here, the water level in the water tank 3 is detected based on the pressure signal from the pressure sensor 35, and the detection result of the water level is compared with a water injection interruption water level (for example, 12L) recorded in advance in the ROM. This water injection interruption water level is set lower than the lowest low water level, and when the CPU determines that the detection result of the water level has reached the water injection interruption water level in step S6, the process proceeds to step S7. Here, based on the drive control of the water supply valve motor 11, the water supply valve 7 is switched from the normal water injection state to the water injection stop state, and the operation of injecting normal temperature tap water is interrupted.

  When the CPU interrupts the water pouring operation at room temperature in step S7, the CPU closes the bypass valve 30 based on turning off the bypass valve solenoid 31 in step S8. Then, the process proceeds to step S9, and the opening degree of the electronic expansion valve 28 is set to an initial value based on driving control of the expansion valve motor 29. The opening degree of the electronic expansion valve 28 is set to an upper limit value based on giving a drive signal of “420 pulses” to the expansion valve motor 29. The initial opening degree of the electronic expansion valve 28 in step S9 is “ 200 pulses / 420 pulses ".

  When the CPU initially sets the opening of the electronic expansion valve 28 in step S9, the CPU starts constant speed operation of the fan motor 21 in step S10. The constant speed operation of the fan motor 21 is to maintain the constant speed prerecorded in the ROM after accelerating the fan motor 21 with the activation pattern prerecorded in the ROM. The inside air is returned into the drum 5 through each of the evaporator 23 and the dividing condenser 22.

  When the CPU starts constant speed operation of the fan motor 21 in step S10, the CPU starts constant speed operation of the comp motor 25 in step S11. The constant speed operation of the comp motor 25 is to maintain the constant speed (for example, 70 Hz) pre-recorded in the ROM after accelerating the comp motor 25 with the activation pattern pre-recorded in the ROM. Then, the refrigerant circulates through the dividing capacitor 22, the dividing capacitor 26, the electronic expansion valve 28, and the evaporator 23 in this order. The evaporator 23 cools the inside air of the drum 5 to remove moisture from the inside air, and the dividing capacitor 22 cools the inside air. The temperature is raised based on heating. Therefore, since high-temperature and low-humidity air is sent into the drum 5, the temperature is raised based on the tap water in the drum 5 being heated.

  When the CPU starts constant speed operation of the compressor motor 25 in step S11, the CPU determines in step S12 whether or not a standby time (for example, 5 minutes) previously recorded in the ROM has elapsed based on the measured value of the counter. This counter is updated by interrupt processing based on the CPU detecting the clock signal from the clock circuit, and the CPU waits for the standby time to elapse based on the start of constant speed operation of the comp motor 25 in step S11. When it is determined that the process has been performed, the process proceeds from step S12 to the EVA temperature control process of step S13. This evaporator temperature control process controls the flow rate of the refrigerant and the opening of the electronic expansion valve 28 so that the surface temperature of the evaporator 23 converges within the set range, and the standby time after the heat pump 43 starts operating. The fan motor 21, the comp motor 25, and the electronic expansion valve 28 are each operated under a fixed condition during the period until the time elapses.

  FIG. 6 shows details of the evaporator temperature control process in step S13. The CPU detects the surface temperature Te of the evaporator 23 based on the temperature signal from the evaporator temperature sensor 36 in step S41 in FIG. Is compared with a lower reference value (for example, −5 ° C.) recorded in advance in the ROM. When “Te ≦ lower reference value” is determined here, the process proceeds to step S42, and the rotational speed of the comp motor 25 is decreased from the current speed by a unit value recorded in advance in the ROM. Then, the process proceeds to step S43, and the opening degree of the electronic expansion valve 28 is increased from the current opening degree by a unit value recorded in advance in the ROM.

  When the CPU proceeds to step S44, the CPU detects the surface temperature Te of the evaporator 23 based on the temperature signal from the evaporator temperature sensor 36, and the detection result of the surface temperature Te is an upper reference value (for example, 0 ° C.) recorded in advance in the ROM. Compare with When “Te ≧ upper reference value” is determined, the process proceeds to step S45, where the rotational speed of the comp motor 25 is increased from the current speed by a unit value recorded in advance in the ROM. Then, the process proceeds to step S46, and the opening degree of the electronic expansion valve 28 is reduced from the current opening degree by a unit value recorded in advance in the ROM. That is, when the surface temperature Te of the evaporator 23 falls below the lower reference value, the flow rate of the refrigerant decreases from the current value and the opening of the electronic expansion valve 28 increases from the current value, so the surface temperature Te of the evaporator 23 increases. . Further, when the surface temperature Te of the evaporator 23 rises above the upper reference value, the flow rate of the refrigerant increases from the current value and the opening of the electronic expansion valve 28 decreases, so the surface temperature Te of the evaporator 23 decreases. In short, the CPU controls the flow state of the refrigerant in the heat pump 43 so that the temperature signal from the evaporator temperature sensor 36 converges within a predetermined range.

  When the CPU moves to step S14 in FIG. 5, the hot air temperature Tf discharged into the drum 5 is detected based on the temperature signal from the hot air temperature sensor 40, and the detection result of the hot air temperature Tf is recorded in the ROM in advance. Compare with the reference value. If “Tf ≧ reference value” is determined, the process proceeds to step S16, and the bypass valve 30 is switched from the closed state to the open state.

  When the CPU determines “warm air temperature Tf <reference value” in step S14, the CPU determines in step S15 whether or not the valve switching time recorded in advance in the ROM has elapsed based on the measured value of the counter. This valve switching time is set to “½ (for example, 10 minutes)” of the water injection resuming time in step S18, and the CPU sets the valve based on the fact that the compressor motor 25 has started constant speed operation in step S11. When it is determined that the switching time has elapsed, the process proceeds from step S15 to step S16, and the bypass valve 30 is switched from the closed state to the open state.

  When the CPU opens the bypass valve 30 in step S16, the CPU proceeds to the evaporation temperature control process in step S17. The evaporator temperature control process in step S17 converges the surface temperature Te of the evaporator 23 within the set range by controlling the flow rate of the refrigerant and the opening of the electronic expansion valve 28 with the same contents as in step S13. When the CPU proceeds from step S17 to step S18, the CPU determines whether or not a water injection resumption time (for example, 20 minutes) previously recorded in the ROM has elapsed based on the measured value of the counter.

  When the CPU determines that the water resumption time has elapsed based on the start of the constant speed operation of the compressor motor 25 in step S11, the CPU proceeds from step S18 to step S19. Here, based on switching the water supply valve 7 from the water injection stop state to the heating water injection state, tap water is injected from the water pipe 10 through the water injection case 9 into the water receiving tank 3, and the process proceeds to the evaporation temperature control process in step S20. The evaporator temperature control process in step S20 is to converge the surface temperature Te of the evaporator 23 within the set range by controlling the refrigerant flow rate and the opening degree of the electronic expansion valve 28 with the same contents as in step S13. When the CPU proceeds from step S20 to step S21, the CPU detects the water level in the water receiving tank 3, and compares the water level detection result with the water level setting result of step S3.

  When the CPU determines in step S21 that the water level in the water receiving tank 3 has reached the water level setting result, the CPU proceeds to step S22. Here, based on switching the water supply valve 7 from the hot water injection state to the water injection stop state, the operation of injecting tap water into the water receiving tank 3 is stopped, and the process proceeds to the evaporation temperature control process in step S23. The evaporator temperature control process in step S23 converges the surface temperature Te of the evaporator 23 within the set range by controlling the refrigerant flow rate and the opening degree of the electronic expansion valve 28 in the same manner as in step S13. When the CPU proceeds from step S23 to step S24, the CPU determines whether or not the cycle stop time recorded in advance in the ROM has elapsed based on the measured value of the counter.

  When the CPU determines that the cycle stop time has elapsed on the basis of stopping the water injection operation in step S22, the CPU proceeds from step S24 to step S25. Here, the compressor motor 25 is shut down, the fan motor 21 is shut down in step S26, and the electronic expansion valve 28 is adjusted to an opening previously recorded in the ROM (for example, an opening corresponding to 400 pulses) in step S27. The process proceeds to step S28.

  When the CPU proceeds to step S28, the CPU determines whether or not the warm water washing time recorded in advance in the ROM has elapsed based on the measured value of the counter. The passage of the warm water washing time is determined based on the fact that the intermittent operation of the drum motor 4 is started in step S5. When the CPU judges that the warm water washing time has elapsed, the process proceeds from step S28 to step S29. To do. Here, the operation of the drum motor 4 is stopped, and the hot water washing process is finished.

  FIG. 7 shows the flow of the hot water washing process in steps S1 to S29 in FIG. In this warm water washing process, the intermittent operation of the drum 5 is started in synchronization with the start of the normal water pouring process, and normal temperature tap water is poured into the laundry in the drum 5. During the normal water injection process, each of the fan motor 21 and the compressor motor 25 is stopped, and each of the dividing capacitor 22, the evaporator 23, and the dividing capacitor 26 is at room temperature.

  When the normal water injection process is stopped, the fan motor 21 and the compressor motor 25 are each started to operate with the bypass valve 30 closed, and the water temperature in the water receiving tank 3 is changed based on the warm air being injected into the water receiving tank 3. To rise. The fan motor 21, the comp motor 25, and the electronic expansion valve 28 are each operated under a predetermined fixed condition during the period from the start of the hot air injection process to the elapse of the standby time. Within this open control period, the temperature of each of the split capacitor 22 and the split capacitor 26 rises rapidly, and the temperature of the evaporator 23 falls sharply.

  After the standby time has elapsed since the start of the hot air injection process, the operating condition of the compressor motor 25 and the operating condition of the electronic expansion valve 28 are controlled according to the surface temperature Te of the evaporator 23. This feedback control is continuously performed until the end of the cycle operation in which the fan motor 21 and the compressor motor 25 are stopped, and the surface temperature Te of the evaporator 23 is controlled within the target range within the feedback control period. Then, during the period from when the feedback control is started to when the hot water injection process is started, the temperature of each of the split capacitor 22 and the split capacitor 26 gradually rises compared to the open control period.

  During the period from the start to the end of the hot air injection process, the high-temperature and high-humidity air in the drum 5 is condensed or condensed by the evaporator 23, and the temperature of the air is made constant by the latent heat exchange. For this reason, since the abnormal temperature drop of the evaporator 23 is prevented, the temperature drop of each of the split capacitor 22 and the split capacitor 26 is suppressed. When the hot air temperature Tf reaches the reference value during the hot air injection process, the bypass valve 30 is opened. A limit time is set for the switching timing of the bypass valve 30. This limit time is set earlier than the start timing of the hot water injection process, and when the limit time has passed without the hot air temperature Tf reaching the reference value, the bypass valve 30 is opened before the start of the hot water injection process. The

  In the hot water injection treatment, tap water is injected into the water receiving tank 3 from the water supply valve 7 through the water pipe 10. Immediately before the start of the hot water injection process, the surface temperature of the split condenser 26 is greatly increased. Immediately after the start of the hot water injection process, the tap water in the water pipe 10 absorbs the heat capacity of the split condenser 26 itself, thereby rapidly increasing. The temperature is greatly increased, and the temperature of the dividing capacitor 26 is rapidly decreased. For this reason, the refrigerant discharged from the compressor 24 bypasses the dividing capacitor 22 and flows intensively to the dividing capacitor 26, so that the temperature of the dividing capacitor 26 is maintained at the lowered level. In this state, tap water in the water pipe 10 absorbs heat capacity from the refrigerant in the refrigerant pipe 27 of the split condenser 26, and hot water at a level corresponding to the temperature of the refrigerant in the split condenser 26 is injected into the water receiving tank 3. The water pipe 10 is set to have a smaller inner diameter than the normal water injection pipe 8, and the hot water injection treatment is set to have a smaller water injection amount per unit time than the normal water injection treatment.

  When the CPU finishes the warm water washing process in step S29 in FIG. 5, the CPU sequentially executes the drainage process in step S30 and the rinse process in step S32. The drainage process in step S30 is to discharge the warm water stored in the water receiving tank 3 by the warm water washing process, and the CPU executes the drainage process by opening the drain valve 13. In the rinsing process in step S32, the amount of tap water corresponding to the result of setting the water level is stored again in the water receiving tank 3, and the laundry in the drum 5 is dropped into the water that does not contain the detergent, so that the detergent is removed from the laundry. In the rinsing process in step S32, the CPU switches the drain valve 13 from the open state to the closed state, and switches the water supply valve 7 from the water injection stop state to the normal water injection state, thereby supplying the water injection case 9 from the water pipe 8. Then, normal temperature tap water is poured into the water receiving tub 3 and the drum motor 4 is rotated to drop the laundry into the water.

  When the CPU finishes the rinsing process in step S32, the CPU sequentially executes the drainage process in step S33 and the dehydration process in step S34. The drainage process in step S33 is to drain the tap water stored in the water receiving tank 3 by the rinsing process, and the CPU executes the drainage process by opening the drain valve 13. The dehydration process in step S34 is to release moisture from the laundry in the drum 5 by centrifugal force, and the CPU executes the dehydration process by operating the drum motor 4.

  When the CPU finishes the dehydration process in step S34, the CPU sequentially executes the drying process in step S35 and the cooling process in step S36. In the drying process in step S35, each of the drum motor 4, the fan motor 21 and the compressor motor 25 is operated, and the drum 5 is rotated to blow dry air of high temperature and low humidity onto the laundry in the drum 5. In this drying process, the bypass valve 30 is switched to the closed state, and the refrigerant discharged from the compressor 24 circulates in each of the dividing condenser 22 and the dividing condenser 26. In the cooling process in step S36, each of the drum motor 4 and the fan motor 21 is operated, and while the drum 5 is rotated, cooling air having a lower temperature than the drying air is blown onto the laundry in the drum 5. This cooling air is for cooling the laundry whose temperature has been increased in the drying process of step S35, and refers to a normal temperature air that is not heat-exchanged by the heat cycle 43.

According to the said Example 1, there exists the following effect.
Based on the water supply valve 7 being in a normal water injection state, normal water injection processing is performed in which normal temperature tap water is injected into the water receiving tank 3 without passing through the water pipe 10, and after the normal water injection processing is stopped, the fan device 41 and the compressor 24 Based on operating each, the hot air injection | pouring process which inject | pours warm air in the water receiving tank 3 was performed. During the hot air injection process, high-humidity air that has absorbed moisture in the water receiving tank 3 is returned from the water receiving tank 3 to the evaporator 23, and moisture is condensed or condensed based on the latent heat exchange performed in the evaporator 23. To do. For this reason, even when the outside air temperature is a low temperature of about “5 ° C.”, it is difficult for the evaporator 23 to form frost, so that the flow of wind to each of the evaporator 23 and the dividing capacitor 22 is suppressed from being inhibited by frost. . Accordingly, a decrease in the operating efficiency of the heat pump 43 can be suppressed, so that each of the split capacitor 22 and the split capacitor 26 can easily rise in temperature.

  At the time when the water injection resumption time has elapsed from the start of the hot air injection process, the temperature of the split condenser 26 is sufficiently higher than that at the start of the hot air injection process, and when the temperature of the split condenser 26 has become sufficiently high. A hot water injection process for injecting tap water into the water receiving tank 3 through the water pipe 10 based on switching the water supply valve 7 to the heated water injection state was started. Immediately after the start of the hot water injection process, the tap water in the water pipe 10 is heated up by absorbing the heat capacity of the split condenser 26 itself, so that the high temperature hot water that absorbs the heat capacity of the split condenser 26 itself is the water receiving tank 3. It will be injected into. For this reason, since it becomes possible to raise water temperature from normal temperature to the temperature suitable for washing | cleaning, a cleaning capability improves.

The refrigerant flow state of the heat pump 43 was controlled so that the detection result of the evaporator temperature sensor 36 converged within a predetermined range. For this reason, since each temperature of the division | segmentation capacitor | condenser 22 and the division | segmentation capacitor | condenser 26 comes to rise quickly, the time required for warming the tap water in the water receiving tank 3 is shortened. Moreover, since the temperature of the refrigerant returning from the evaporator 23 to the inside of the compressor 24 is increased, the temperature of the lubricating oil in the compressor 24 is also increased. For this reason, since the penetration amount of the refrigerant into the lubricating oil is suppressed, it is possible to prevent the lubricating performance of the lubricating oil from being lowered based on the change in the dilution degree of the lubricating oil. Accordingly, it is possible to prevent the components from operating smoothly inside the compressor 24, so that reliability is improved.
<< Example 2 >>
A three-way valve 45 is connected to the discharge port of the compressor 24 as shown in FIG. The three-way valve 45 is driven by a valve solenoid composed of an electromagnetic solenoid. The three-way valve 45 is a water supply state in which the refrigerant discharged from the compressor 24 flows to the split condenser 26 and the split condenser 22, respectively, and the refrigerant discharged from the compressor 24. Can be switched between the dry states of flowing through the dividing capacitor 22 without flowing through the dividing capacitor 26.

  FIG. 9 shows the control contents of the control circuit 34 when the hot water washing course is set, and when the CPU of the control circuit 34 stores the tap water at the normal temperature of the water injection interrupted level in the water receiving tank 3, in step S7. The water supply valve 7 is switched from the normal water injection state to the water injection stop state. In step S8, the three-way valve 45 is switched to the water injection state. In step S9, the opening degree of the electronic expansion valve 28 is initialized. In step S10, the fan motor 21 is started at a constant speed. Start constant speed operation. And step S12-step S34 are performed in the water injection state of the three-way valve 45, and the three-way valve 45 is switched from a water injection state to a dry state by the drying process of step S35. Therefore, in the warm water washing process in steps S12 to S27, the refrigerant flows to each of the dividing capacitor 22 and the dividing capacitor 26, and in the drying process in step S35, the refrigerant flows to the dividing capacitor 22 without flowing to the dividing capacitor 26. Therefore, the generation efficiency of warm air for drying the laundry in the drying process in step S35 is increased.

  In the second embodiment, when the temperature of the dividing condenser 22 is abnormally increased in the drying process in step S35, the three-way valve 45 is switched from the dry state to the water injection state, and the water supply valve 7 is switched from the water injection stop state to the heating water injection state. Alternatively, the refrigerant may be cooled based on heat exchange with the split condenser 26.

In each of the first to second embodiments, a shell-and-tube type capacitor may be used as the split capacitor 26.
<< Example 3 >>
As shown in FIG. 10, a corrugated fin type capacitor 50 is accommodated in the main duct 16. The capacitor 50 is constituted by interposing a plurality of fins between straight portions of one meandering refrigerant tube and joining each of the plurality of fins to the straight portion of the refrigerant tube. (A) of FIG. 11 shows the piping state of the capacitor | condenser 50, and the refrigerant | coolant pipe | tube 51 of the capacitor | condenser 50 is arranged in 4 rows in the left-right direction. One water pipe 52 having a meandering shape is joined to the plurality of fins of the capacitor 50. The water pipes 52 are arranged in two rows in the left-right direction, and the inner surface of the water pipe 52 is formed of a smooth surface as shown in FIG. Each row of the water pipes 52 is interposed between the rows of the refrigerant pipes 51 and indirectly contacts the refrigerant pipes 51 through the fins of the condenser 50 as shown in FIG. . As shown in FIG. 10, the water pipe 52 is connected to the heating output port of the water supply valve 7 via the water pipe 10. When the water supply valve 7 is in the heated water injection state, the water pipe 52 and the water injection case of the condenser 50 from the water pipe 10. The tap water is injected into the water tank 3 through 9.

  FIG. 12 shows the control contents of the control circuit 34 when the hot water washing course is set, and when the CPU of the control circuit 34 stores the tap water at the normal temperature of the water injection interrupted level in the water receiving tank 3, in step S7. The water supply valve 7 is switched from the normal water injection state to the water injection stop state. In step S9, the opening degree of the electronic expansion valve 28 is initially set. In step S10, the constant speed operation of the fan motor 21 is started. In step S11, the constant speed operation of the comp motor 25 is started. When it is determined that the standby time has elapsed since the start of the constant speed operation of the comp motor 25, the process proceeds from step S12 to step S17 and step S18, and the surface temperature Te of the evaporator 23 is set to “−5 ° C. to 0 ° C.”. Wait for the refilling time to elapse while controlling within the set range.

  When the CPU determines that the water resumption time has elapsed in step S18, the CPU proceeds to step S19. Here, the water supply valve 7 is switched from the water injection stop state to the heating water injection state, and tap water is injected from the water pipe 10 of the water supply valve 7 into the water receiving tank 3 through the water pipe 52 of the condenser 50 and the water injection case 9. In this state, since the tap water in the water pipe 52 is heated based on heat exchange between the tap water in the water pipe 52 and the refrigerant in the refrigerant pipe 51, the temperature in the water receiving tank 3 is higher than the normal temperature. Hot water is injected (hot water injection). The fins of the capacitor 50 are set within a range of “0.1 mm to 0.15 mm” in order to achieve both the function of heating the air and the function of transferring the heat of the refrigerant from the refrigerant pipe 51 to the tap water through the water pipe 52. Yes.

According to the said Example 3, there exist the following effects.
The temperature of the condenser 50 is sufficiently higher than that at the start of the hot air injection process when the water injection resumption time has elapsed from the start of the hot air injection process, and the water supply valve when the temperature of the capacitor 50 becomes sufficiently high. On the basis of switching 7 to the heated water injection state, a hot water injection process for injecting tap water into the water receiving tank 3 through the water pipe 52 was started. Immediately after the start of this hot water injection process, the tap water in the water pipe 52 rises in temperature by absorbing the heat capacity of the condenser 50 itself, so that the high temperature hot water that absorbs the heat capacity of the condenser 50 itself enters the water receiving tank 3. Be injected. For this reason, since it becomes possible to raise water temperature from normal temperature to the temperature suitable for washing | cleaning, a cleaning capability improves.

  It was set as the structure which produces | generates both warm water and warm air using the capacitor | condenser 50. FIG. This eliminates the need for the dedicated dividing capacitor 26 for warming the tap water, thereby realizing space saving and cost reduction. The water tubes 52 of the capacitor 50 are arranged in two rows in the left-right direction. For this reason, since the length dimension of the water pipe 52 in the unfolded state is shortened, when the water supply valve 7 is switched from the hot water pouring state to the water pouring stop state, water falls from the water pipe 52 due to the siphon effect. Therefore, it is difficult for water to remain in the water pipe 52, so that freezing and rust are prevented from occurring on the inner surface of the water pipe 52.

The inner surface of the water pipe 52 was formed from a smooth surface. For this reason, stress due to freezing does not concentrate on a part of the inner surface of the water pipe 52, and therefore, the water pipe 52 is prevented from bursting due to freezing. In addition, since water does not remain on the inner surface of the water tube 52, the inner surface of the water tube 52 is prevented from being rusted from this point. Since each row of the water pipes 52 is interposed between the rows of the refrigerant pipes 51, the tap water in the water pipes 52 can efficiently absorb heat from the refrigerant in the refrigerant pipes 51. Moreover, a corrugated fin type capacitor 50 was used. For this reason, since the heat conductivity through the fin between the refrigerant pipe 51 and the water pipe 52 is improved, heat exchange between the refrigerant in the refrigerant pipe 51 and the tap water in the water pipe 52 is efficiently performed. .
<< Example 4 >>
As shown in FIG. 13, a compressor temperature sensor 55 corresponding to a compressor temperature sensor is fixed to the discharge port of the compressor 24, and the control circuit 34 compresses the compressor based on the temperature signal output from the compressor temperature sensor 55. The discharge port temperature Tr of 24 discharge ports is detected. A condenser temperature sensor 56 corresponding to a condenser temperature sensor is fixed to the condenser 50, and the control circuit 34 detects the surface temperature Tc of the condenser 50 based on a temperature signal output from the condenser temperature sensor 56.

  FIG. 14 shows the details of the evaporation temperature control processing executed by the CPU of the control circuit 34 in steps S17, S20 and S23 of FIG. 12, respectively. The CPU detects the surface temperature of the evaporator 23 in step S41 of FIG. Te is detected, and the detection result of the surface temperature Te is compared with the lower reference value (−5 ° C.). When “Te ≦ −5 ° C.” is determined here, the rotational speed of the compressor motor 25 is delayed by a unit value from the current speed in step S42, and the opening of the electronic expansion valve 28 is decreased by the unit value from the current opening in step S43. Enlarge.

  When the CPU proceeds to step S47, the CPU detects each of the discharge port temperature Tr of the compressor 24 and the surface temperature Tc of the capacitor 50, and calculates a temperature difference ΔT (Tr−Tc) therebetween. Then, the process proceeds to step S48, and the calculation result of the temperature difference ΔT is compared with a reference value (5 ° C.) recorded in advance in the ROM. When “ΔT ≧ 5 ° C.” is determined, the process proceeds to step S49, where the opening degree of the electronic expansion valve 28 is reduced by a unit value from the current opening degree.

  When the CPU proceeds to step S50, the CPU detects the discharge port temperature Tr of the compressor 24 and the surface temperature Tc of the capacitor 50, and the detection result of the discharge port temperature Tr and the detection result of the surface temperature Tc are recorded in the ROM in advance. Compared with the reference value (50 ° C.). Here, when it is determined that “Tr ≧ 50 ° C.” and “Tc ≧ 50 ° C.”, the routine proceeds to step S51, where the rotational speed of the comp motor 25 is decreased by a unit value from the current speed.

  When the CPU proceeds to step S44, the CPU detects the surface temperature Te of the evaporator 23 and compares the detection result of the surface temperature Te with the upper reference value (0 ° C.). When “Te ≧ 0 ° C.” is determined, the rotational speed of the compressor motor 25 is increased from the current speed by a unit value in step S45, and the opening of the electronic expansion valve 28 is decreased from the current opening by a unit value in step S46. .

According to the said Example 4, there exists the following effect.
When the temperature difference ΔT between the detection result of the discharge port temperature Tr of the compressor 24 and the detection result of the surface temperature Tc of the capacitor 50 is “5 ° C.” or more, the opening degree of the electronic expansion valve 28 is decreased and the refrigerant flow of the heat pump 43 is flowed. The temperature difference ΔT was controlled to be “5 ° C.” or more by controlling the state. For this reason, since the temperature of the lubricating oil in the compressor 24 is increased, the amount of refrigerant dissolved in the lubricating oil is suppressed. Therefore, it is possible to prevent the lubricating performance of the lubricating oil from being lowered based on the change in the dilution degree of the lubricating oil, so that it is possible to prevent the parts from operating smoothly inside the compressor 24. In particular, when the outside air temperature is a low temperature of about 5 ° C., the temperatures at the outlet and the inlet of the evaporator 23 are similar to each other, and superheat control cannot be performed. However, the detection result of the discharge port temperature Tr and the detection of the surface temperature Tc Since the resulting temperature difference ΔT is controlled to be equal to or greater than a certain value “5 ° C.”, a highly reliable operation can be performed.

In each of the first to fourth embodiments, the hot water injection process may be performed in a plurality of times.
In each of the first to fourth embodiments, each of the fan motor 21 and the comp motor 25 is operated during the normal water injection process in which normal temperature tap water is injected from the water supply valve 7 into the water receiving tank 3 through the water pipe 8. You may inject | pour warm air, inject | pouring normal temperature tap water in the water receiving tank 3 based on starting.

  In each of the first to fourth embodiments, the water supply valve 7 may be switched to the heated water injection state based on the passage of the variable water injection resumption time after the constant speed operation of the compressor 24 is started. In this case, the surface temperature of the dividing capacitor 26 or the like or the hot air temperature discharged into the drum 5 is detected, and the detection result of the surface temperature or the detection result of the hot air reaches the reference value recorded in advance in the ROM. Based on the above, the water supply valve 7 may be switched to the heated water injection state.

<< Example 5 >>
As shown in FIG. 15, a bath water pump 61 is accommodated inside the outer box 1. This bath water pump 61 pumps bath water from the bathtub, and operates using a pump motor as a drive source. The discharge port of the bath water pump 61 is connected to the water injection case 9 through a bath water pipe 62, and an open / close valve 63 is interposed in the bath water pipe 62. The on-off valve 63 is driven by an on-off valve solenoid comprising an electromagnetic solenoid, and can be switched between an open state and a closed state.

  A three-way valve 64 is interposed in the water pipe 10, and the three-way valve 64 is connected to a discharge port of the bath water pump 61 through a bath water pipe 65. The three-way valve 64 is driven by a three-way valve solenoid composed of an electromagnetic solenoid, and is switchable between an open state and a closed state. The on-off valve 63 and the three-way valve 64 constitute a valve mechanism 65 together with the water supply valve 7.

  FIG. 16 shows the control contents of the control circuit 34 when a hot water washing course using bath water is set. The hot water washing course using the bath water is set by the CPU of the control circuit 34 in accordance with the operation contents of the plurality of switches 33, and the CPU performs each of steps S4 and S19 in the hot water washing course using the bath water. Then, the bath water is started to be poured into the water receiving tank 3 instead of the tap water, and the bath water pouring operation is stopped in each of Step S7 and Step S22. Hereinafter, each of step S4-step S22 is demonstrated.

  When the CPU proceeds to step S4, the on-off valve 63 is switched to the open state and the three-way valve 64 is switched to the closed state when the water supply valve 7 is in the water injection stop state. This state corresponds to a third water injection state in which the bath water pumped by the bath water pump 61 is injected into the water receiving tank 3 without passing through the water pipe 10, and the CPU is in the third water injection state of the valve mechanism 65. The pump motor is started to operate, and bath water is injected from the bathtub into the water receiving tank 3 through the bath water pipe 62 and the water injection case 9 (normal bath water injection). When the CPU determines in step S6 that the water level in the water receiving tank 3 has reached the water injection interruption water level, the CPU stops the bath water injection operation based on stopping the pump motor in step S7. That is, in step S8 to step S18, warm air is supplied into the water receiving tank 3 in a state where the bath water is stored, and the bath water stored in the water receiving tank 3 is heated.

  When the CPU proceeds to step S19, the on-off valve 63 is switched to the closed state and the three-way valve 64 is switched to the open state when the water supply valve 7 is in the water injection stop state. This state corresponds to the fourth water injection state in which the bath water pumped up by the bath water pump 61 is injected into the water receiving tank 3 through the water pipe 10, and the CPU operates in the fourth water injection state of the valve mechanism 65 in the pump motor. The bath water is injected from the bathtub into the water receiving tank 3 through the bath water pipe 65, the water pipe 10 and the water injection case 9 (bath water warm water injection). When the CPU determines in step S21 that the water level in the water receiving tank 3 has reached the set result, the CPU stops the bath water injection operation based on stopping the pump motor in step S22. That is, in steps S19 to S21, heat exchange is performed between the refrigerant in the refrigerant pipe 27 of the split condenser 26 and the bath water in the water pipe 10, and hot water heated by the split condenser 26 is supplied into the water receiving tank 3. The

According to the said Example 5, there exist the following effects.
The bath water is drawn from the bathtub and heated. For this reason, since the temperature of warm water becomes high compared with the case where tap water is heated and warmed, the washing effect of the laundry is improved. Moreover, when the bath water in the water receiving tank 3 is heated by warm air, the temperature and humidity of the wind supplied from the water receiving tank 3 to the evaporator 23 are higher than when tap water is used. For this reason, since each temperature of the division | segmentation capacitor | condenser 22 and the division | segmentation capacitor | condenser 26 comes to rise rapidly, heating performance improves.

  In the said Example 5, the water injection operation of the 1st time which stores the water of the water injection interruption water level in the water receiving tank 3 is performed using the bath water pump 61, and the set water level according to the determination result of the weight in the water receiving tank 3 The second water injection operation for storing the water may be performed using the water supply valve 7. In this case, at the time of the second water injection, the water supply valve 7 is switched from the water injection stop state to the heat water injection state without operating the pump motor, and the three-way valve 64 is switched from the closed state to the open state, and the tap water is put into the water receiving tank 3. Water is poured through the water pipe 10.

  In the fifth embodiment, when the bath water in the bathtub is depleted while the bath water pump 61 is used for the second water pouring operation, the bath water pump 61 is shut down and the water supply valve 7 is stopped. It is possible to switch from the state to the heated water injection state, and tap water into the water receiving tank 3 through the water pipe 10. In this case, when the control circuit 34 performs the second water injection operation using the bath water pump 61, the water level increase rate per unit time in the water receiving tank 3 is detected, and the water level increase rate is recorded in the ROM in advance. It is good to comprise so that exhaustion of bath water may be judged based on being less than the made reference value.

  In the said Example 5, based on operating each of the fan motor 21 and the comp motor 25 during execution of the bath water normal water injection process which injects bath water into the water receiving tank 3 through the bath water pipe 62 from the bath water pump 61. Then, hot air may be injected while injecting bath water into the water receiving tank 3.

  In each of the first embodiment, the second embodiment, and the fifth embodiment, the water pipe 10 is indirectly brought into contact with the refrigerant pipe or fin of the split condenser 26 via a metal heat transfer member. In each of the examples 4, the water pipe 52 may be indirectly brought into contact with the refrigerant pipe 51 or the fin of the condenser 50 via a metal heat transfer member.

  In each of the first to fifth embodiments, the rinsing process in step S32 may be performed using warm water in the same manner as the warm water washing process.

The figure which shows Example 1 (The figure which shows the internal structure of an outer case) Diagram showing refrigeration cycle Diagram showing electrical configuration Diagram showing refrigerant pipe and water pipe The figure which shows the control contents of the control circuit The figure which shows the control contents of the control circuit Diagram showing the flow of hot water washing treatment The figure which shows Example 2 (figure 2 equivalent figure) Figure equivalent to FIG. The figure which shows Example 3 (FIG. 2 equivalent figure) (A) is a figure which shows the piping state of a capacitor | condenser, (b) is a figure which shows the cross-sectional shape of the water pipe | tube of a capacitor | condenser. Figure equivalent to FIG. FIG. 2 equivalent diagram showing Example 4 6 equivalent diagram FIG. 2 equivalent diagram showing Example 5 Figure equivalent to FIG.

Explanation of symbols

3 is a water receiving tank, 5 is a drum (washing tub), 7 is a water supply valve (valve mechanism), 10 is a water pipe, 23 is an evaporator (evaporator), 24 is a compressor (compressor), 34 is a control circuit, and 36 is an evaporator. Temperature sensor (evaporator temperature sensor), 41 is a fan device (blower), 42 is a condenser (condenser), 43 is a heat pump, 52 is a water pipe, 55 is a compressor temperature sensor (compressor temperature sensor), and 56 is a condensation temperature sensor (Condenser temperature sensor), 61 bath water pump, 65 indicates a valve mechanism.

Claims (4)

A washing tub into which clothing is put;
A water receiving tub in which the washing tub is rotatably stored;
A blower that circulates the air in the water receiving tank in one direction with the internal space of the water receiving tank as a start point and an end point, respectively;
A compressor and a condenser through which refrigerant discharged from the compressor flows; and an evaporator through which refrigerant discharged from the compressor flows through the condenser; ,
A water pipe for injecting tap water into the water receiving tank, which is in direct or indirect contact with the condenser;
A first water injection state in which tap water is injected into the water receiving tank without passing through the water pipe, a second water injection state in which tap water is injected into the water receiving tank through the water pipe, and a water supply in the water receiving tank. A valve mechanism that can be switched between water-injection stop states that do not inject water;
Each of the blower, the compressor, and the valve mechanism is driven and controlled, and tap water is passed through the water receiving tank based on the valve mechanism being in the first water injection state. Injecting hot air into the water receiving tank based on operating the blower and the compressor after stopping the normal water injection process and without stopping the normal water injection process or during the execution of the normal water injection process Hot water injection for injecting tap water into the water receiving tank through the water pipe based on the warm water injection processing and the valve mechanism being set to the second water injection state after a lapse of time from the start of the hot air injection processing A washing machine comprising: a control circuit that performs processing. A compressor temperature sensor for detecting the temperature of the discharge port of the compressor;
A condenser temperature sensor for detecting the temperature of the condenser;
The control circuit controls the flow state of the refrigerant of the heat pump so that a detection result of the compressor temperature sensor is larger than a predetermined value that is larger than a detection result of the condenser temperature sensor. The washing machine according to claim 1. An evaporator temperature sensor for detecting the temperature of the evaporator;
The said control circuit controls the flow state of the refrigerant | coolant of the said heat pump so that the detection result of the said evaporator temperature sensor may converge in the predetermined fixed range. The washing machine described. It has a bath water pump that can pump out bath water from the bathtub,
The valve mechanism injects the bath water pumped by the bath water pump into the water receiving tank without passing the water pipe in addition to the first water injection state, the second water injection state, and the water injection stop state. It is possible to switch between a third water injection state and a fourth water injection state in which bath water pumped up by the bath water pump is injected into the water receiving tank through the water pipe. The washing machine according to any one of 1 to 3.

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