JP5332290B2 - Ventilation air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ventilation air-conditioning device capable of suppressing acceleration/deceleration vibration generated when starting/stopping a compressor. <P>SOLUTION: As a body of the ventilation air-conditioning device is provided with a refrigerating cycle composed of a single phase induction compressor 1, a condensation coil 2, a pressure reducing means 3 and an evaporation coil 4, and a driving circuit 11 of the single phase induction compressor 1 is provided with a decelerating means 3, rotary torque of the single phase induction compressor 1 can be reduced, and the speed can be reduced by the load, thus the acceleration/deceleration vibration generated in starting/stopping the single phase induction compressor 1 can be reduced, and vibrational stress to refrigerant piping 5 can be reduced. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a ventilation air conditioner that performs ventilation air conditioning of a bathroom or the like using a heat pump.

  As a ventilation air conditioner such as a bathroom using a conventional heat pump, one heat exchanger of the heat pump radiates (or absorbs heat) to air taken from outside the bathroom, and blows the air into the bathroom, There is one in which the other heat exchanger of the heat pump heats (or dissipates) heat from the air discharged from the bathroom to the outside, thereby air-conditioning the bathroom (for example, see Patent Document 1).

  Moreover, as a method of reducing the vibration of the compressor, a first relay for turning on / off the voltage supply to the compressor and a capacitor in series with the auxiliary winding of the compressor are arranged. When the compressor is started by providing a second relay between them, the first relay and the second relay are both short-circuited to start the compressor by the rotating magnetic field consisting of the auxiliary winding and the capacitor, and stop the compressor When opening the second relay, first, the rotating magnetic field consisting of the auxiliary winding and the capacitor is eliminated, and by switching to the rotating magnetic field due to the rotating inertia of the compressor, the rotational torque is weakened and the rotational speed is reduced. After the reduction, there is a method of opening the first relay and completely stopping the compressor (for example, see Patent Document 2).

JP 2005-180712 A Japanese Patent No. 3930397

  In such a conventional ventilation air-conditioning apparatus, one of the vibration factors of a compressor using an induction motor is vibration that occurs at the time of starting and stopping.

  This vibration factor is the acceleration vibration that occurs when the compressor accelerates toward the steady rotational speed (power supply frequency minus sliding) at startup and the deceleration vibration that occurs when the compressor decelerates stationary when stopped. Although it is short, the vibration is larger than when rotating at a steady rotational speed, and stress is applied to the refrigerant pipe connected to the compressor, causing a pipe crack or the like.

  The conventional method of reducing compressor vibration as exemplified in Patent Document 2 is a configuration in which the number of rotations of the compressor is reduced by the presence or absence of a rotating magnetic field composed of an auxiliary winding and a capacitor. However, there is a problem that it can only act at the time of a stop where the rotational inertia remains.

  In addition, most of the ventilation air conditioners are installed by a stationary construction in which they are laid flat and fixed on the ceiling of a bathroom (such as a unit bath), or by a hanging construction in which they are fixed to mounting hardware suspended from the top of the bathroom.

  For this reason, the vibration generated from the ventilation air conditioner is transmitted as sound and vibration from the mounting bracket and the ceiling of the bathroom into the bathroom, but there is a problem that it is highly reverberant in a narrow space such as the bathroom and becomes a problem as noise and abnormal noise. there were.

  In addition, since the bathroom is used naked by the user, it is necessary to increase the temperature of the heating, so the load on the compressor is higher than that of a normal living room (living room, etc.), so the compressor is stopped. There has been a problem that the deceleration vibration generated sometimes increases.

  Also, the bathroom is generally narrow and limited (about 1-2 tsubo), so the bathroom temperature can be warmed relatively quickly, but the compressor ON / OFF required to keep the temperature on average There is a problem that the frequency increases and the frequency of occurrence of the aforementioned problems increases.

  The present invention solves such a conventional problem, and reduces acceleration / deceleration vibration generated at the time of starting and stopping of the compressor and reducing vibration stress to the refrigerant pipe connected to the compressor. It aims at providing the ventilation air conditioner which can do.

In order to achieve the above object, a ventilation air conditioner of the present invention comprises a refrigeration cycle comprising a single-phase induction compressor, a condensing coil, a decompression means, an evaporation coil, and a drive circuit for the single-phase induction compressor. means for supplying a resistor as a relay for short-circuiting both ends of this resistor, the impedance ratio of the resistor and the single-phase induction compressor by opening the relay when stop the startup to the single-phase induction compressor The voltage is stepped down.

  And according to this invention, while reducing the acceleration-deceleration vibration generate | occur | produced at the time of starting and stopping of a single phase induction compressor, the ventilation air conditioning which can reduce the vibration stress to the refrigerant | coolant piping connected to the single phase induction compressor A device is obtained.

According to the present invention, the main body includes a refrigeration cycle comprising a single-phase induction compressor, a condensing coil, a decompression means, an evaporation coil, and a drive circuit for the single-phase induction compressor. The speed reduction means includes a resistor and the resistor. as a relay for short-circuiting both ends of, by monkey step down the voltage supplied to the single-phase induction compressor by the impedance ratio of the resistor and the single-phase induction compressor by opening the relay when stop the startup, a simple With a low-cost configuration, the rotational torque of the single-phase induction compressor can be reduced and decelerated by the load, reducing the acceleration / deceleration vibration that occurs when the single-phase induction compressor starts and stops, and single-phase induction Vibration stress to the refrigerant pipe connected to the compressor can be reduced.

  Moreover, the ventilation air-conditioning apparatus with the effect that the starting electric current which generate | occur | produces at the time of starting of a single phase induction compressor can be reduced through a resistor can be provided.

Schematic sectional view showing a ventilation air-conditioning apparatus according to Embodiment 1 of the present invention Configuration diagram of the drive circuit of the single-phase induction compressor Operation explanatory diagram of the drive circuit of the single-phase induction compressor ((a) Operation explanatory diagram at startup, (b) Operation explanatory diagram at stop) Configuration diagram of drive circuit of single-phase induction compressor described in reference example 1 Driving circuit operation explanatory diagram of the single-phase induction compressor described in the reference example 1 ((a) operation explanatory diagram at the start, (b) operation explanatory diagram at the stop) Configuration diagram of drive circuit of single-phase induction compressor described in reference example 2 Operation explanatory diagram of the drive circuit of the single phase induction compressor described in Reference Example 2 ((a) Operation explanatory diagram at start-up, (b) Operation explanatory diagram at stop) Configuration diagram of drive circuit of single-phase induction compressor described in reference example 3 Operation explanatory diagram of the drive circuit of the single-phase induction compressor ((a) Operation explanatory diagram at startup, (b) Operation explanatory diagram at stop) Operation explanatory diagram of the drive circuit of the single-phase induction compressor ((a) Operation explanatory diagram at startup, (b) Operation explanatory diagram at stop) Schematic sectional view showing the ventilation air conditioner described in the reference example 4 Configuration diagram of the drive circuit of the single-phase induction compressor Operation explanatory diagram of the drive circuit of the single-phase induction compressor ((a) Operation explanatory diagram at startup, (b) Operation explanatory diagram at stop) Schematic sectional view showing the ventilation air conditioner described in Reference Example 5 Configuration diagram of the drive circuit of the single-phase induction compressor Schematic sectional view showing the ventilation air conditioner described in the reference example 6 Configuration diagram of the drive circuit of the single-phase induction compressor Schematic sectional view showing the ventilation air conditioner described in the reference example 7 Configuration diagram of the drive circuit of the single-phase induction compressor Operation explanatory diagram of the drive circuit of the single-phase induction compressor ((a) Operation explanatory diagram at startup, (b) Operation explanatory diagram at stop)

The invention according to claim 1 of the present invention includes a refrigeration cycle comprising a single-phase induction compressor, a condensing coil, a decompression means, an evaporation coil in the main body, and a drive circuit for the single-phase induction compressor. as a relay for short-circuiting the resistor both ends of this resistor, reduces the voltage supplied to the single-phase induction compressor by the impedance ratio of the resistor and the single-phase induction compressor by opening the relay when stop and startup The voltage supplied to the single-phase induction compressor should be reduced by the impedance ratio of the single-phase induction compressor and the resistor, and the flowing current should be reduced by the combined impedance of the single-phase induction compressor and the resistor. Thus, the rotational torque of the single-phase induction compressor can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
The ventilation air conditioner of Embodiment 1 of this invention is demonstrated referring FIG.1, FIG.2 and FIG.3.

  FIG. 1 shows an example of a ventilation air conditioner of the present invention, FIG. 2 is a diagram showing a configuration of a drive circuit 11 of a single-phase induction compressor 1 of the present invention, and FIG. 3 shows an example of the operation of the drive circuit. FIG.

  As shown in FIG. 1, a single-phase induction compressor 1, a condensing coil 2, a decompression means 3, and an evaporating coil 4 are connected to a refrigeration cycle comprising a refrigerant pipe 5 through which a refrigerant passes and air in a room (for example, a bathroom) is drawn into an inlet 6 And a ventilation fan 8 that ventilates the air to the ventilation port 7 through the evaporation coil 4, and a circulation that sucks indoor air from the suction port 6 and blows out again from the air outlet 9 into the room through the condensation coil 2. A main body 12 having a fan 10 and a drive circuit 11 for the single-phase induction compressor 1 is installed on a ceiling (not shown) on the indoor ceiling, and the high-temperature and high-pressure refrigerant is cooled by the single-phase induction compressor 1. Heat is dissipated to the air sucked from the room by the circulation fan 10 through the refrigeration pipe 5 and moved to the decompression means 3, depressurized to low temperature and low pressure, and moved to the evaporation coil 4. Air sucked from the room Back to the single-phase induction compressor 1 absorbs the heat.

  In this way, the room is air-conditioned by absorbing heat from the air ventilated from the ventilation port 7 and radiating the heat from the air outlet 9 to the air circulating in the room.

  As shown in FIG. 2, the drive circuit 11 of the single-phase induction compressor 1 is connected to the speed reduction means 15 and the single-phase induction compressor 1 constituted by a resistor 13 and a speed reduction relay 14 that short-circuits both ends of the resistor 13. The activation relay 16 for turning on / off the power supply is provided.

  With the above configuration, when starting the single-phase induction compressor 1, the start relay 16 is short-circuited, and the impedance ratio between the resistor 13 and the single-phase induction compressor 1 is set as shown in FIG. The voltage supplied to the phase induction compressor 1 is stepped down, and since the current is reduced because the voltage is supplied through the resistor 13, the single phase induction compressor 1 is energized, and after the preset time (t1), the deceleration relay 14 Is supplied to the single-phase induction compressor 1 at a rated voltage equal to the AC power supply voltage.

  When stopping the single-phase induction compressor 1, as shown in FIG. 3 (b), after opening the deceleration relay 14, the start relay 16 is opened after a preset time (t2). The power supply to the phase induction compressor 1 is cut off.

  The voltage supplied to the single-phase induction compressor 1 is reduced by the impedance ratio of the single-phase induction compressor 1 and the resistor 13, and the flowing current is reduced by the combined impedance of the single-phase induction compressor 1 and the resistor 13. Thus, the voltage and current supplied to the single-phase induction compressor 1 are quantitatively reduced, the rotational torque generated by the single-phase induction compressor 1 is reduced, and the single-phase induction compression determined by the power supply frequency Since the rotational speed of the machine 1 can be decelerated by the load under the action of the reduced rotational torque, the acceleration / deceleration vibration generated when the single-phase induction compressor 1 is started and stopped can be reduced with a simple and inexpensive configuration. While being dispersed and reduced in stages, vibration stress on the refrigerant pipe 5 connected to the single-phase induction compressor 1 can be reduced, and is generated when the single-phase induction compressor 1 is started via the resistor 13. Reduce the starting current Door can be.

( Reference Example 1 )
A ventilation air conditioner according to Reference Example 1 of the present invention will be described with reference to FIGS.

In the description of the reference example 1 , the same parts already described in the first embodiment are given the same reference numerals and the description thereof is omitted.

  FIG. 4 shows an example of the configuration and operation of the drive circuit 11 of the single-phase induction compressor 1 of the present invention.

  As shown in FIG. 4, the speed reduction means 15 is configured as a first positive temperature coefficient thermistor 17 constituted by a positive temperature coefficient thermistor generally called PTC and a speed reduction relay 14 that short-circuits both ends of the first positive temperature coefficient thermistor 17. And

  In the above configuration, when starting the single-phase induction compressor 1, as shown in FIG. 5A, the start relay 16 is short-circuited, and the impedance ratio between the first positive characteristic thermistor 17 and the single-phase induction compressor 1 is set. Thus, the voltage supplied to the single-phase induction compressor 1 is stepped down, and since the current is reduced because it passes through the first positive characteristic thermistor 17, the single-phase induction compressor 1 is energized, and a preset time ( t1) After that, the rated relay equal to the AC power supply voltage is supplied to the single-phase induction compressor 1 by short-circuiting the deceleration relay 14.

  Next, when stopping the single-phase induction compressor 1, as shown in FIG. 5 (b), after opening the deceleration relay 14, the start relay 16 is opened after a preset time (t 2). The power supply to the single phase induction compressor 1 is cut off.

  The voltage supplied to the single-phase induction compressor 1 is reduced by the impedance ratio of the single-phase induction compressor 1 and the first positive characteristic thermistor 17, and the flowing current is the single-phase induction compressor 1 and the first positive characteristic thermistor. The rotational torque generated by the single-phase induction compressor 1 can be reduced by the reduction by the composite impedance of 17, and the rotational speed of the single-phase induction compressor 1 determined by the power supply frequency is reduced. Therefore, the acceleration / deceleration vibration generated when the single-phase induction compressor 1 is started and stopped is distributed and reduced in two stages, and the refrigerant pipe connected to the single-phase induction compressor 1 is reduced. 5 can be reduced, and the starting current generated when the single-phase induction compressor 1 is started can be reduced through the first positive temperature coefficient thermistor 17.

  Further, the first positive characteristic thermistor 17 has a characteristic that the resistance value rapidly increases when the temperature reaches a predetermined temperature due to heat generation. When the temperature reaches the predetermined temperature due to heat generation, the single-phase induction compressor 1 The first positive temperature coefficient thermistor 17 generates heat when the contact of the speed reducing relay 14 is not short-circuited at the time of start-up, or when the contact of the start-up relay 16 is not opened at the time of stop-up. As a result, the resistance value increases rapidly, and most of the supply voltage can be consumed by the first positive characteristic thermistor 17, and voltage and current supply to the single-phase induction compressor 1 can be cut off.

( Reference Example 2 )
A ventilation air conditioner according to Reference Example 2 of the present invention will be described with reference to FIGS.

In the description of the reference example 2 , the same parts as those already described in the first embodiment and the reference example 1 are given the same reference numerals and the description thereof is omitted.

  FIG. 6 shows an example of the configuration and operation of the drive circuit 11 of the single-phase induction compressor 1 of the present invention.

  As shown in FIG. 6, the first positive temperature coefficient thermistor 17 is provided with a second positive temperature coefficient thermistor 18 composed of positive temperature coefficient thermistors (PTCs) having different resistance capacities at both ends.

  In the above configuration, when starting the single-phase induction compressor 1, as shown in FIG. 7A, the voltage supplied to the single-phase induction compressor 1 is reduced to the first positive value by short-circuiting the start relay 16. The combined resistance value of the characteristic thermistor 17 and the second positive characteristic thermistor 18 is reduced by the impedance ratio of the single-phase induction compressor 1, and the flowing current is the combined resistance value of the first positive characteristic thermistor 17 and the second positive characteristic thermistor 18. By reducing the combined impedance of the single-phase induction compressor 1 and energizing the single-phase induction compressor 1 and short-circuiting the deceleration relay 14 after a preset time (t1), the AC power supply voltage is supplied to the single-phase induction compressor 1 Supply a rated voltage equal to.

  Next, when stopping the single-phase induction compressor 1, as shown in FIG. 7B, the voltage supplied to the single-phase induction compressor 1 by opening the deceleration relay 14 is the first positive characteristic. The combined resistance value of the thermistor 17 and the second positive characteristic thermistor 18 is reduced by the impedance ratio of the single-phase induction compressor 1, and the flowing current is the same as the combined resistance value of the first positive characteristic thermistor 17 and the second positive characteristic thermistor 18. The voltage is reduced by the combined impedance of the phase induction compressor 1, and further, the combined resistance value changes due to the heat generation of the first positive characteristic thermistor 17 and the second positive characteristic thermistor 18, and the voltage supplied to the single phase induction compressor 1 By changing the current, the single-phase induction compressor 1 is energized while the rotational torque generated by the single-phase induction compressor 1 is varied and reduced, and the start-up reset is performed after a preset time (t2). By opening the over 16, to cut off the power supply to the single-phase induction compressor 1.

  Since the rotational speed of the single-phase induction compressor 1 determined by the power supply frequency can be decelerated by the action of the rotational torque reduced by the first positive characteristic thermistor 17 and the second positive characteristic thermistor 18, The acceleration / deceleration vibration generated when the induction compressor 1 is started and stopped can be dispersed and reduced, and vibration stress on the refrigerant pipe 5 connected to the single-phase induction compressor 1 can be reduced.

  Further, the starting current generated when the single-phase induction compressor 1 is started can be reduced by passing through the first positive characteristic thermistor 17 and the second positive characteristic thermistor 18. Is not short-circuited, or when the contact of the starting relay 16 is not opened at the time of stoppage, etc., the first positive characteristic thermistor 17 and the second positive characteristic thermistor 18 generate heat and the resistance value increases rapidly. It can be consumed by the first positive characteristic thermistor (PTC) 17 and the second positive characteristic thermistor 18, and the voltage and current supply to the single-phase induction compressor 1 can be cut off.

( Reference Example 3 )
A ventilation air conditioner according to Reference Example 3 of the present invention will be described with reference to FIGS. 8, 9, and 10. FIG.

In the description of the reference example 3 , the same components already described in the first embodiment and the reference examples 1 and 2 are assigned the same reference numerals and the description thereof is omitted.

  FIG. 8 shows an example of the configuration of the drive circuit 11 of the single-phase induction compressor 1 according to the present invention. FIG. 9 shows the operation of the drive circuit 11 of the single-phase induction compressor 1 according to the present invention as a voltage step. An example in which the variable is variable is shown. FIG. 10 shows an example of changing the voltage in two stages as a representative example of changing the voltage in multiple stages as the operation of the drive circuit 11 of the single-phase induction compressor 1 of the present invention.

  As shown in FIG. 8, the drive circuit 11 of the single-phase induction compressor 1 is configured as an energization switching unit 20 configured by a bidirectional thyristor 19 and a control unit 21 that controls the energization timing of the energization switching unit 20. It is said.

  In the above configuration, when the single-phase induction compressor 1 is started, as shown in FIG. 9A, the control means 21 at the energization timing set after a predetermined time (ta) from the zero cross point of the AC voltage. A drive signal is transmitted to the energization switching means 20 every half cycle of the AC power supply, and the received energization switching means 20 supplies a voltage to the single-phase induction compressor 1 at a timing according to the drive signal, and a voltage in a half-missed state. In order to supply the single-phase induction compressor 1 with the voltage V4, which has a waveform and is variable by one step as a voltage with reduced active power per cycle, the rotation of the single-phase induction compressor 1 is the rotation corresponding to this effective power. Become.

  When a predetermined time (t3) has elapsed from the start of activation, the drive signal sent from the control means 21 to the energization switching means 20 is switched to the constant energization (ie, the AC power supply is energized as it is without adjusting the energization timing). Thus, a rated voltage equal to the AC power supply voltage is supplied to the single-phase induction compressor 1.

  Next, when the single-phase induction compressor 1 is stopped, as shown in FIG. 9B, the control means 21 supplies power at a power supply timing set after a predetermined time (tb) from the zero cross point of the AC voltage. A drive signal is transmitted to the switching means 20 every half cycle of the AC power supply, and a voltage V6 that is variable by one step is applied. The rotation of the single-phase induction compressor 1 is a rotation corresponding to this effective power, and a stop operation is performed. When a predetermined time (t4) elapses from the start, the drive signal sent from the control means 21 to the energization switching means 20 is switched to the energization interruption, and the voltage supplied to the single-phase induction compressor 1 is interrupted.

  In addition, what is shown in FIG. 10 is to set the multi-stage using the action of changing the number of rotations of the single-phase induction compressor 1 by changing the energization timing in multiple stages. FIG. 7 shows an example of setting to.

  As shown in FIG. 10 (a), when starting up, the drive signal is sent from the control means 21 to the energization switching means 20 at the energization timing set after a predetermined time (tc) from the zero cross point of the AC voltage. The voltage V7, which is transmitted every half cycle and is variable in the first stage, is applied to the single-phase induction compressor 1, and the rotation of the single-phase induction compressor 1 is a rotation corresponding to this effective power, and a predetermined time from the start of startup. When (t5) has elapsed, the energization timing of the drive signal sent from the control means 21 to the energization switching means 20 is switched, and becomes the energization timing set after a predetermined time (td) from the zero cross point of the AC voltage. A variable voltage V8 is applied to the single-phase induction compressor 1, and the rotation of the single-phase induction compressor 1 becomes a rotation corresponding to this effective power. When a predetermined time (t6) elapses, the control is performed. Setsu換Ri to the drive signal is always energized sent from unit 21 to the conduction switching means 20 supplies an AC power supply voltage equal to the rated voltage to the single-phase induction compressor 1.

  Next, when the single-phase induction compressor 1 is stopped, as shown in FIG. 10B, the control means 21 supplies power at a power supply timing set after a predetermined time (te) from the zero cross point of the AC voltage. A drive signal is transmitted to the switching means 20 every half cycle of the AC power supply, and the variable V10 at the first stage is applied to the single-phase induction compressor 1, and the rotation of the single-phase induction compressor 1 depends on this active power. When a predetermined time (t7) has elapsed from the start of the stop operation, the energization timing of the drive signal sent from the control means 21 to the energization switching means 20 is switched, and the predetermined time (tf) from the zero cross point of the AC voltage is switched. The energization timing set later is applied, and the variable voltage V9 in the second stage is applied to the single-phase induction compressor 1, and the rotation of the single-phase induction compressor 1 is a rotation corresponding to this effective power, When the time (t8) has elapsed, the drive signal sent from the control unit 21 to the conduction switching means 20 cuts off the voltage supplied Setsu換Ri to energization cutoff, the single-phase induction compressor 1.

  Further, since the energization switching means 20 uses the bidirectional thyristor 19, the drive signal from the control means 21 may be a short pulse, and once the energization of the bidirectional thyristor 19 is started, even if the drive signal is interrupted, During the half cycle period of the AC power supply, the power supply to the single-phase induction compressor 1 is continued.

  And by controlling the voltage supplied to the single-phase induction compressor 1 and varying the power supplied to the single-phase induction compressor 1, the number of revolutions of the single-phase induction compressor 1 can be varied, The acceleration / deceleration vibration generated when the induction compressor 1 is started and stopped can be reduced, and the vibration stress applied to the refrigerant pipe 5 connected to the single-phase induction compressor 1 can be reduced.

  In addition, since the voltage supply time is shortened by the energization timing, the starting current generated when starting the single-phase induction compressor 1 can be reduced.

  Moreover, the control means 21 can supply the electric power supplied to the single phase induction compressor 1 in two stages by two kinds of preset output settings (energization timing), and the single phase induction compressor 1 is started. Acceleration / deceleration vibration generated at the time of stopping can be dispersed and reduced in two stages.

  Further, the starting current generated when starting the single-phase induction compressor 1 can be dispersed and reduced in a plurality of stages.

  In the fourth embodiment of the present invention, the change in the drive signal of the single-phase induction compressor 1 has been described in one stage and two stages, but it may be provided in more multiple stages.

( Reference Example 4 )
A ventilation air conditioner according to Reference Example 4 of the present invention will be described with reference to FIGS.

In the description of the reference example 4 , the same parts as those already described in the first embodiment and the reference examples 1 to 3 are given the same reference numerals and the description thereof is omitted.

  FIG. 11 shows an example of a ventilation air-conditioning apparatus of the present invention, FIG. 12 shows an example of the configuration of the drive circuit 11 of the single-phase induction compressor 1 of the present invention, and FIG. An example of operation | movement of the drive circuit 11 of the phase induction compressor 1 is shown.

  As shown in FIGS. 11 and 12, there is a configuration in which a minimum output energization timing value is set as the energization timing to the indoor temperature detection means 23 and the energization switching means 20 for detecting the indoor temperature. The main body 12 is provided with a drive circuit 11 having a control means 22 that variably controls in proportion to a predetermined variable time according to the room temperature. The minimum output energization timing value indicates a value set in advance corresponding to the voltage at the start of starting the supply voltage to the single-phase induction compressor 1.

  In the above configuration, when starting the single-phase induction compressor 1, as shown in FIG. 13 (a), the control means 22 sets the minimum output energization timing so that the supply voltage to the single-phase induction compressor 1 becomes V11. A value (STN) is set, and after a predetermined time (tg) from the zero cross point of the AC voltage, a drive signal is transmitted from the control means 22 to the energization switching means 20, and then for a predetermined time (tg) every half cycle of the AC power supply. ) Is shortened (for example, <next time tg = (current time tg) -1 ms>), and the received energization switching means 20 supplies the voltage to the single-phase induction compressor 1 at a timing according to the drive signal, and is partially missing. Since the voltage waveform of the state is obtained and the effective power per cycle is supplied to the single-phase induction compressor 1 as a reduced voltage, the rotation of the single-phase induction compressor 1 is a rotation corresponding to the effective power.

  Further, in order to shorten the predetermined time (tg) every half cycle of the AC power supply, the supply voltage to the single-phase induction compressor 1 gradually increases, and finally a rated voltage equal to the AC power supply voltage is set to the single-phase induction. Supply to the compressor 1.

  Next, when the single-phase induction compressor 1 is stopped, as shown in FIG. 13B, the control means 22 supplies power at a power supply timing set after a predetermined time (th) from the zero cross point of the AC voltage. A drive signal is transmitted to the switching means 20, and thereafter, a predetermined time (th) is enlarged (for example, <next th = (current th) +1 ms>) for each half cycle of the AC power source, and transmitted, and the single-phase induction compressor 1 The rotation of is in accordance with this effective power.

  Further, when the supply voltage to the single-phase induction compressor 1 reaches a predetermined time (th) of the lowest output energization timing value (STN) at which V11 becomes V11, the drive signal sent from the control means 22 to the energization switching means 20 is interrupted. And the voltage supplied to the single-phase induction compressor 1 is cut off.

  In addition, when the room temperature is high (for example, 35 ° C. or more), the control means 22 increases the refrigerant temperature and the pressure when the room temperature is high (for example, 35 ° C. or more). Since the torque required for the induction compressor 1 to rotate increases, the minimum output energization timing value is set to (Max), the supply voltage to the single-phase induction compressor 1 is started and stopped as V13, and When the room temperature is low (for example, 15 ° C. or lower), the refrigerant temperature is low and the pressure is low, so the load of the refrigeration cycle is reduced overall, and the torque required for the single-phase induction compressor 1 to rotate is reduced. Therefore, the minimum output energization timing value can be set to (Min), and the supply voltage to the single-phase induction compressor 1 can be started and stopped as V12.

  With the above configuration, the control means 22 varies the power supplied to the single-phase induction compressor 1 in a variable time by varying the preset minimum output energization timing to the maximum output energization timing at a predetermined time. On the other hand, the acceleration / deceleration vibration generated when the single-phase induction compressor 1 is started and stopped by synchronizing the acceleration and deceleration of the single-phase induction compressor 1 with changes in the supply power. In addition, the startup current generated at startup can be reduced.

  Further, when the single-phase induction compressor 1 is started and stopped, it is controlled by the control means 22 within the range of the minimum output energization timing to the maximum output energization timing, and unnecessary power supply to the single-phase induction compressor 1 is suppressed. And can be started and stopped quickly.

  Further, the control means 22 calculates the load state of the single-phase induction compressor 1 from the value of the room temperature detection means 23, and starts and stops in accordance with the load state of the single-phase induction compressor 1, whereby the single-phase induction compressor 1 Unnecessary power supply to the compressor 1 can be suppressed, and appropriate quick start and stop can be performed.

( Reference Example 5 )
A ventilation air conditioner according to Reference Example 5 of the present invention will be described with reference to FIGS. 13, 14 and 15.

In the description of the reference example 5 , the same parts already described in the first embodiment and the reference examples 1 to 4 are given the same reference numerals and the description thereof is omitted.

  FIG. 14 shows an example of a ventilation air conditioner of the present invention, and FIG. 15 shows an example of the configuration of the drive circuit 11 of the single-phase induction compressor 1 of the present invention.

  As shown in FIGS. 14 and 15, a discharge temperature detecting means 24 for detecting the discharge temperature of the refrigerant circuit of the single-phase induction compressor 1 and a control means 22 for controlling the energization timing of the switching means according to the discharge temperature are provided. The configuration.

  With the above-described configuration, when the discharge temperature is high (for example, 100 ° C. or more), the control means 22 has an increased discharge pressure of the single-phase induction compressor 1 due to the input of the discharge temperature detection means 24. Since the required torque of the compression process when rotating is high, the minimum output energization timing value is set to (Max), and the supply voltage to the single-phase induction compressor 1 is V13 shown in FIGS. 13 (a) and 13 (b). When the discharge temperature is low (for example, 50 ° C. or less), the discharge pressure of the single-phase induction compressor 1 is low, and the torque required for the compression process when the single-phase induction compressor 1 rotates Therefore, the minimum output energization timing value can be set to (Min), and the supply voltage to the single-phase induction compressor 1 can be started and stopped as V12 shown in FIGS. 13 (a) and (b).

  And the control means 22 can calculate the load state of the single-phase induction compressor 1 from the value of the discharge temperature detection means 24, and can change the minimum output energization timing according to the required torque of the single-phase induction compressor 1, By starting and stopping according to the load state of the single-phase induction compressor 1 that changes depending on the use environment, unnecessary power supply to the single-phase induction compressor 1 is suppressed, and appropriate quick start and stop are performed. be able to.

( Reference Example 6 )
A ventilation air conditioner according to Reference Example 6 of the present invention will be described with reference to FIGS. 13, 16 and 17.

In the description of Reference Example 6 , the same components already described in Embodiment 1 and Reference Examples 1 to 5 are assigned the same reference numerals and description thereof is omitted.

  FIG. 16 shows an example of a ventilation air conditioner of the present invention, and FIG. 17 shows an example of the configuration of the drive circuit 11 of the single-phase induction compressor 1 of the present invention.

  As shown in FIGS. 16 and 17, the discharge pressure detection means 25 for detecting the discharge pressure of the single-phase induction compressor 1 and the control means 22 for controlling the energization timing of the switching means according to the discharge pressure are provided. To do.

With the above configuration, the input of the control unit 22 discharge pressure detection detemir stage 25, when the discharge pressure is high (e.g. 4MPa or more), since the required torque of the compression step in the single-phase induction compressor 1 rotates is high, When the minimum output energization timing value is set to (Max), the supply voltage to the single-phase induction compressor 1 is started and stopped as V13 shown in FIGS. 13A and 13B, and the discharge pressure is low (For example, 2 MPa or less), since the required torque of the compression process when the single-phase induction compressor 1 rotates is low, the minimum output energization timing value is set to (Min), and the supply voltage to the single-phase induction compressor 1 Can be started and stopped as V12 shown in FIGS. 13 (a) and 13 (b).

  The discharge pressure detection means 25 accurately detects the variable load state by detecting the discharge pressure indicating the load state of the single-phase induction compressor 1, and the control means 22 detects the load state of the single-phase induction compressor 1. Can be calculated from the value of the discharge pressure detecting means 25, and the minimum output energization timing can be varied according to the required torque of the single-phase induction compressor 1, and can be adjusted according to the load state of the single-phase induction compressor that changes depending on the use environment. By starting and stopping, it is possible to suppress unnecessary power supply to the single-phase induction compressor and to start and stop appropriately and quickly.

( Reference Example 7 )
A ventilation air conditioner according to Reference Example 7 of the present invention will be described with reference to FIGS. 18, 19, and 20. FIG.

In the description of the reference example 7 , the same parts as those already described in the first embodiment and the reference examples 1 to 6 are given the same reference numerals and the description thereof is omitted.

  FIG. 18 shows an example of the ventilation air-conditioning apparatus of the present invention, FIG. 19 shows an example of the configuration of the drive circuit 11 of the single-phase induction compressor 1 of the present invention, and FIG. An example of operation | movement of the drive circuit 11 of the phase induction compressor 1 is shown.

  As shown in FIGS. 18 and 19, the decompression means 3 is an electric expansion valve 26, a control means 27 having a function of opening and closing the expansion valve opening is provided, and the control means 27 further includes a single-phase induction compression. When starting up the machine 1, start up after fully opening the opening of the electric expansion valve 26, and when stopping the single-phase induction compressor 1, after opening up the opening of the electric expansion valve 26, The stop operation can be started after a time when the discharge pressure and the suction pressure of the single-phase induction compressor 1 are equalized (for example, the pressure difference is within 0.1 MPa).

  The drive circuit 11 of the single-phase induction compressor 1 includes a diode bridge 28 that performs full-wave rectification of the AC power supply voltage, and a first switching relay 29 and a second switching relay 30 that switch the connection to the single-phase induction compressor 1. In the frequency switching means 31 configured, the first resistor 32 is connected between the + output of the diode bridge 28 and the first switching relay 29, and the first resistor 32 is connected between the − output of the diode bridge 28 and the second switching relay 30. The two-resistor 33 is connected, and the starting relay 16 that turns on and off the voltage supply to the single-phase induction compressor 1 is provided. And the alternating current power supply voltage of this Embodiment shows a commercial alternating current power supply voltage.

  With the above configuration, as shown in FIG. 20 (a), when starting the single-phase induction compressor 1, both the contact points of the first switching relay 29 and the second switching relay 30 are normally closed (Nc) side. The relay 16 is short-circuited and the supply of power to the single-phase induction compressor 1 is started (energization pattern A). After that, by switching the energization pattern to B, C, D, and A every half cycle of the AC voltage, the supply voltage frequency to the single-phase induction compressor 1 is artificially converted to 1/2 frequency of the AC voltage. After a predetermined time (t10) from the start of operation, the contacts of the first switching relay 29 and the second switching relay 30 are both fixed to the normally closed (Nc) side, so that the voltage and frequency equal to the AC voltage are single-phase induction. It will be supplied to the compressor 1.

  When the single-phase induction compressor 1 is stopped, as shown in FIG. 20B, the energization pattern is switched from B, C, D, and A every half cycle of the AC voltage from the energization pattern A, The supply voltage frequency to the induction compressor 1 is artificially converted to a half frequency of the AC voltage, and after a predetermined time (t11) from the start of the stop operation, the start relay 16 is opened, and the single-phase induction compressor 1 Stop supplying power to

  Further, in the energization pattern B, since the voltage is supplied to the single-phase induction compressor 1 via the second resistor 33, the supply voltage is stepped down by the impedance ratio between the second resistor 33 and the single-phase induction compressor 1. In the energization pattern C, since the voltage is supplied to the single-phase induction compressor 1 through the first resistor 32, the supply voltage is stepped down by the impedance ratio between the first resistor 32 and the single-phase induction compressor 1. Voltage.

  The frequency of supplying power to the single-phase induction compressor 1 is set to a half of the AC power supply voltage in a pseudo manner, so that the number of revolutions of the single-phase induction compressor 1 can be reduced. The acceleration / deceleration vibration generated when the machine 1 is started and stopped can be reduced, and the vibration stress on the refrigerant pipe connected to the single-phase induction compressor 1 can be reduced.

  The voltage supplied to the single-phase induction compressor 1 is reduced by the impedance ratio of the single-phase induction compressor 1, the first resistor 32, and the second resistor 33, and the flowing current is the same as that of the single-phase induction compressor 1. By reducing the combined impedance of the first resistor 32 and the second resistor 33, the rotational torque of the single-phase induction compressor 1 can be reduced, which is commensurate with the reduced rotational speed of the single-phase induction compressor 1. By supplying voltage, excessive acceleration / deceleration vibration can be reduced and loss due to magnetic saturation can be suppressed.

  Further, when the single-phase induction compressor is started or stopped, the opening pressure of the expansion valve is temporarily opened to reduce the discharge pressure of the single-phase induction compressor 1 and is necessary for the rotation of the single-phase induction compressor 1. Since the torque is also reduced, the load fluctuation range can be suppressed and the effect of vibration reduction can be stabilized.

In the reference example 7 , the first resistor 32 and the second resistor 33 are described as being configured. However, even if the first resistor 32 and the second resistor 33 are not provided, the power supply frequency of 1 is simulated. / 2 frequency can be supplied to the single-phase induction compressor 1, and the supply voltage to the single-phase induction compressor 1 at that time is as shown by the dotted line in FIG.

  The ventilation air-conditioning apparatus of the present invention is characterized by suppressing acceleration / deceleration vibration that occurs at the time of starting and stopping the compressor, not only in the ventilation and air-conditioning of the bathroom, but also in the living room, bedroom, kitchen or washroom, etc. It can also be applied to a ventilation air conditioner.

DESCRIPTION OF SYMBOLS 1 Single-phase induction compressor 2 Condensation coil 3 Pressure reducing means 4 Evaporation coil 5 Refrigerant piping 6 Suction port 7 Ventilation port 8 Ventilation fan 9 Air outlet 10 Circulation fan 11 Drive circuit 12 Main body 13 Resistor 14 Deceleration relay 15 Deceleration unit 16 Start relay DESCRIPTION OF SYMBOLS 17 1st positive characteristic thermistor 18 2nd positive characteristic thermistor 19 Bidirectional thyristor 20 Energization switching means 21 Control means 22 Control means 23 Indoor temperature detection means 24 Discharge temperature detection means 25 Discharge pressure detection means 26 Electric expansion valve 27 Control means 28 Diode Bridge 29 First switching relay 30 Second switching relay 31 Frequency switching means 32 First resistor 33 Second resistor

Claims (1)

The main body has a refrigeration cycle comprising a single-phase induction compressor, a condensing coil, a decompression means, an evaporation coil, and a drive circuit for the single-phase induction compressor, and the speed reduction means short-circuits the resistor and both ends of the resistor. as a relay, ventilating air-conditioning system according to claim buck Sarukoto the voltage supplied by the impedance ratio of the resistor and the single-phase induction compressor by opening the relay when stop the startup to the single-phase induction compressors.

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