JPS5920586Y2 - Heat pump air conditioner - Google Patents

Description

[Detailed description of the invention] This invention is an improved heat pump type in which the compressor stop/restart time setting timer time is different between summer cooling and winter heating in response to changes in refrigerant pressure balance time. Regarding air conditioners.

First, the basic configuration of the heat pump air conditioner according to the present invention will be explained.

Figure 1 shows a cycle diagram of a heat pump type air conditioner. 1 is a compressor, 2 is a four-way valve, 3 is a condenser, 4 is a capillary tube, and 5 is an evaporator. During summer cooling, the refrigerant passes through the four-way valve 2 as shown by the arrow in the JJ condenser.It is carefully condensed, passes through the capillary tube 4, evaporates in the evaporator 5, returns to the four-way valve 2, and then returns to the compressor 1. During winter heating, the air is circulated through the evaporator 5 and the condenser 3 by switching the four-way valve 2.

Figure 2 shows the electrical system diagram of a heat pump type air conditioner.
is a compressor motor, 7 is an outdoor fan motor, 8 is a four-way valve electromagnetic coil, 9 is an indoor fan motor, 10 is a power plug, and 11 is for energizing and cutting off the four-way valve electromagnetic coil 8 by 0N-OFF operation. 12 is a relay switch for driving the compressor motor 6 and the outdoor fan 7, which is driven by the temperature control circuit and the timer circuit to turn it ON and OFF; 13 is a relay switch for increasing or decreasing the rotation speed of the indoor fan motor 9; This is an air volume selector switch, and when the indoor temperature rises above a predetermined temperature during summer cooling, the
When the switch 12 is turned ON and the compressor motor 6 and the outdoor fan motor 7 are energized, and the indoor temperature falls below a predetermined temperature, the relay switch 12 is turned OFF.
In addition, during winter heating, the cooling/heating changeover switch 11 is turned on and the four-way valve electromagnetic coil 8 is energized to switch the four-way valve 2 shown in FIG. turns on and compressor motor 6
And the outdoor fan motor 7 is energized, and when the indoor temperature reaches a predetermined temperature or higher, the relay switch 12 is turned OFF.
It operates as an FF.

In the above case, summer cooling and winter heating are performed by switching the four-way valve 2, but when the four-way valve 2 is switched, the refrigerant pressure balance time differs between cooling and heating.

Therefore, it is necessary to vary the time from when the operation of the compressor 1 stops until it starts again, and the restart prevention timer that counts the time from when the operation of the compressor 1 stops until it starts again. A relationship of timer setting time ≧ refrigerant pressure balance time is required.

However, in conventional air conditioners, the stop/restart time setting timer has a single time setting, and the timer time is the same for summer cooling and winter heating, and the refrigerant pressure balance time is the same. A timer time is set to correspond to large heating conditions, so during cooling, the timer setting time elapses after the refrigerant pressure balance time has elapsed, and the relay switch is finally turned on and the compressor starts operating, causing the room temperature to rise. It was also a problem to keep it to the lower limit.

This invention drives the compressor motor and turns on the race first.
For the compressor stop/restart time setting timer, a timer with a structure in which the timer time can be switched between long and short using two timer time switching terminals is used, and a cooling/heating selection switch is connected to either of the two terminals of this timer. By providing a switch that changes in conjunction with the air conditioner, it is possible to set a compressor restart prevention time that corresponds to the different refrigerant pressure balance times during cooling and heating. be.

The following is a third embodiment of the P1-pump air conditioner of the present invention.
This will be explained with reference to the figures and FIG. 4.

In FIG. 3, the same symbols as in FIG. 2 represent the same things.

14 is a temperature detector, 15 is a temperature adjustment circuit, and 16 is two timer time switching terminals 16A that serve to switch the timer time between two types, long and short.

16B (set so that the timer time becomes shorter when switching to terminal 16A).

), 17 is a resistor, 18 is a transistor, 19 is a relay, 20 is a diode for protecting the relay 19, and 21 is the cooling/heating changeover switch 11 in FIG.
The two terminals 16A and 16B of the timer circuit 16
This is a terminal selector switch that changes between.

The temperature regulator 15 is connected to the temperature sensor 1 as shown in FIG.
The comparator circuit 30 compares the potentials of the temperature detector 14 and the temperature controller 15 that sets the room temperature, and the potentials of the resistors R1 and R2 that determine the reference voltage. When this happens, signal 1 is input to the NAND circuit 31 of the general timer circuit]6.

In addition, the temperature detector 14, the temperature regulator 15, the resistors R1, R
2. The comparison circuit 30 constitutes a room temperature setting circuit that outputs a signal when the room temperature reaches a constant temperature.

On the other hand, a threshold circuit 32 is connected to this NAND circuit 31 via a NOT circuit 33, and a resistor R3, a capacitor 34 with a capacitance C, and selection resistors R1o and R1□ are connected to this threshold circuit 32. .

The NAND circuit 31 connects the I
- Connected to transistor 18.

When the indoor temperature drops below a predetermined temperature during winter heating, the temperature detector 14 detects this, and when the difference from the reference voltage exceeds a certain value, a signal 1 is input from the comparison circuit 30 to the NAND circuit 31.

On the other hand, at this time, the cooling/heating changeover switch 11 is turned on, the four-way valve 2 is switched, and the terminal changeover switch 21 is tilted toward the terminal 16B side.

Therefore, the delay time T1 at this time is the well-known V
-VSH From the formula, T1 (sec) = -CR1□In -V
becomes.

Here, V is the power supply voltage, 8H is the threshold circuit operating voltage, and C is the capacitance of the capacitor 34.

That is, the signal 1 from the comparison circuit 30 is sent to the NAND circuit 3.
1 and the signal 1 from the threshold circuit 32 after T1 has passed since the compressor motor 6 stops.
When input, the signal from NAND circuit 31 is sent to relay 1.
9 is excited and the relay switch 12 is turned on to operate the compressor motor 6.

Conversely, when the indoor temperature rises to a predetermined temperature or higher, the temperature detector 14 detects this and the signal O from the comparison circuit 30 changes to N.
It is applied to the AND circuit 31.

Therefore, relay 19 is demagnetized and relay switch 1
2 is turned off and the compressor motor 6 stops.

After T1 has elapsed from this time, the threshold circuit 32
Signal 1 is input to the NAND circuit 31, and when the temperature detector 14 detects a predetermined temperature, the motor 6 is driven again.

In the above case, since it is winter heating, the cooling/heating selector switch 11 is
By turning on the switch 21, the timer circuit 16
If the timer is switched to the terminal 16B side, the timer time setting will correspond to the refrigerant pressure balance time during winter heating.

In addition, during summer cooling, by turning off the cooling/heating selector switch 11, the switch 21 is activated by the timer circuit]6 terminal 1.
If it is linked to switch to the 6A side, the timer time will correspond to the refrigerant pressure balance time during summer cooling.

That is, at this time, the temperature adjustment circuit 15 is adjusted so that the comparison circuit 30 outputs a signal 1 when the temperature is above a predetermined temperature, and the signal O is output from the comparison circuit 30 when the temperature is below a predetermined temperature.

In addition, since the switch 21 is located on the terminal 16A side (short delay time), the delay time at this time is shorter than that during heating <T2
(SeC)-CR]O1n ""' tonal.

■ As explained above, the heat pump air conditioner of the present invention has a compressor stop/restart time setting timer that turns on the relay switch that drives the compressor motor, and a two-way timer to switch the timer time between two types: long and short. This air conditioner uses a timer with two timer time switching terminals, and one terminal of this timer is equipped with a switch that switches in conjunction with a four-way valve switch, so it can be used for both summer cooling and winter heating. The timer setting time can be changed to two types in response to different refrigerant pressure balance times, and the indoor temperature can be adjusted by bringing the compressor restart time closer to the refrigerant pressure balance time while maintaining the relationship between the timer setting times heard during refrigerant pressure balance. It has the effect of being able to be controlled within predetermined upper and lower limits.

[Brief explanation of drawings]

Figure 1 is a refrigerant cycle diagram of the heat pump type air conditioner of the present invention, Figure 2 is an electrical system diagram for explaining the basic configuration of the P1 to pump type air conditioner, and Figure 3 is the heat pump of the embodiment of the present invention. Figure 4 is a timer circuit diagram. 1... Compressor, 2... Four-way valve, 3...
... Condenser, 4 ... Evaporator, 11 ...
・・Cooling/heating selector switch, 12・・Lew switch, 16・・Timer circuit, 16A, 16B・・・・・・
...Timer time switching terminal, 21...Terminal selection switch.

Claims (1)

[Scope of utility model registration request] A heat pump type air conditioner that is equipped with a compressor, a condenser, an evaporator, and a four-way valve that allows the refrigerant compressed by the compressor to flow through the condenser to the evaporator in the summer and vice versa in the winter, allowing for cooling in the summer and heating in the winter. In the compressor, a compressor stop/restart time setting timer circuit is connected to the relay switch for driving the compressor motor, and this timer circuit can set two types of timer times, long and short, and has two timer time switching terminals. , a terminal changeover switch is provided to selectively change over either of the changeover terminals, and the changeover of this terminal changeover switch is linked to the switch that changes over the four-way valve, and the timer circuit is configured to set a timer when the room temperature reaches a predetermined temperature. A room temperature setting circuit that outputs a signal is connected to the circuit, and after the signal from this room temperature setting circuit is input and the compressor motor stops, there is a delay corresponding to the switching position of the terminal selector switch of the above-mentioned timer. A heat pump air conditioner that allows the compressor motor to be driven again.