JPH01305237A - Air conditioner - Google Patents

Abstract

PURPOSE:To start the following heating mode operation without any holding time by performing the pump down operation upon completing the heating mode operation so as to pump the refrigerant up which leaked from inside the heating cycle to the compressor, accumulator, outdoor refrigerant condenser, etc. CONSTITUTION:When the start signal is sent out by turning on the switch 21, the heating operation section 22 drives a heat transfer means 18 to start a heating operation. On the other hand, when the stop signal is sent out, the heating operation section 22 stops the operation of the heat transfer means 18, and, at the same time, the recovery operation signal 23 drives a recovery means 19 so as to pump the refrigerant up into the heating cycle which gradually leaked from inside the heating cycle to the compressor 6, accumulator 9, outdoor refrigerant condenser 8, etc. After a certain time, the operation of the recovery means 19 is stopped, and the initial state of heating mode operation stoppage is resumed. As the refrigerant is replenished in the heating cycle upon completing the heating mode operation, the following heating mode operation can be started without requiring a holding time.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an air conditioning device that connects indoor and outdoor units with refrigerant piping, and in particular heats the refrigerant with a burner or the like and transfers the heat to the indoor unit for heating. It is related to air conditioners.

2. Description of the Related Art Heat pump air conditioners are generally put into practical use as devices that perform heating and cooling by connecting indoor and outdoor units with refrigerant piping. However, in the case of heat pump air conditioners, the capacity decreases at low outside temperatures when heating is most needed, and
There are problems such as the need to temporarily stop heating and perform defrosting operation in order to remove frost on the outdoor heat exchanger, and problems remain in heating operation. In order to solve the heating problems of heat pump air conditioners as described above, a method has been proposed in which a gas or oil burner heats the refrigerant and a compressor transports the heat to the indoor unit for heating. In addition to gas or oil, this also uses electricity to operate the compressor, so it has not become widely used due to operation and maintenance costs.

As a solution to such problems, the patent application
According to Japanese Patent No. 5729-7), there is a system as shown in FIG. In other words, in Fig. 5, during heating operation,
First, at the start of heating, the first solenoid valve 1, the second solenoid valve 2, and the on-off valve 3 are closed, the third solenoid valve 4 and the fourth solenoid valve 5 are opened, and the compressor 6 is operated.

Since the refrigerant line is sealed by the action of the first solenoid valve 1 and the second reverse valve 7, the refrigerant distributed in the outdoor refrigerant condenser 8, accumulator 9, and various refrigerant pipes connected thereto is When the compressor 6 is operated, the suction pump is turned off, and all the refrigerant is pumped up to the refrigerant heater through the first backsho valve 10. After this bombing operation, the compressor 6 is stopped, the fourth solenoid valve 5 is closed, and the burner (
(not shown) to start heating operation. The refrigerant pumped into the refrigerant heater 11 is heated by the burner and evaporated, which increases the evaporation pressure, and the evaporated high temperature and high pressure refrigerant gas flows from the refrigerant heater 11 to the third solenoid valve 4 and from the refrigerant pipe 12. It is fed under pressure to the indoor heat exchanger 13. At this time, when the indoor fan 14 is operated, the high-temperature, high-pressure refrigerant gas radiates heat and performs heating, thereby condensing and liquefying. The refrigerant liquid flows from the refrigerant pipe 15 through the third check valve 16 into the liquid receiver 17 and is received therein. When the liquid level of the liquid receiver reaches a certain level, the on-off valve 3 is opened and evaporation pressure is applied to the liquid receiver, and in order to have the same static pressure as the refrigerant heater 11, the liquid level of the liquid receiver 17 is lowered. Due to the head differential pressure, the refrigerant liquid in the liquid receiver 17 flows into the refrigerant heater. After the liquid level in the liquid receiver 17 drops, the on-off valve 3 closes and returns to its initial state. .

As described above, during heating operation, the heating cycle is configured by pumping refrigerant gas using the increase in vapor pressure due to refrigerant heating and dropping refrigerant liquid using the liquid level head differential pressure. It performs heating operation without requiring the operation of a compressor or pump using electricity.

Problems to be Solved by the Invention However, in the above-described configuration, pump town is performed every time before the burner starts ignition operation.

In other words, even if heating is required and operation is performed, a certain amount of waiting time is required while the pump town is being performed before the 1ζ burner is actually ignited and heating begins, which is very inconvenient for the user. It was not easy to use. The present invention solves these problems,
The purpose is to improve usability.

The air conditioner of the present invention includes a heating device that heats a heat medium, a heat exchanger that heats air by heat exchange with the heat medium, and a heat exchanger that heats air by heat exchange with the heat medium. A heat transfer means for performing heating by circulating a medium between the heating device and the heat exchanger, a recovery means for recovering the heat medium to the heating device, and controlling the driving of the heating device, the heat transfer means, and the recovery means. The control section includes a switch for switching start/stop of heating operation, a heating operation section for driving the heating device and the heat transfer means according to a start signal from the switch, and a heating operation section for driving the heating device and the heat transfer means according to a stop signal from the switch. The present invention is configured to include a monthly income driving section that drives the time collection means.

According to the above-described structure, the refrigerant gradually leaking from the heating cycle to the compressor, accumulator, outdoor refrigerant condenser, etc. is pumped up into the heating cycle by performing the recovery operation for a predetermined time after the heating operation ends. Therefore, when heating starts, heating operation can be started immediately without waiting time, and usability can be improved.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings. In the description of the embodiment, the same parts as in FIG. 3 are designated by the same reference numerals for convenience, and the description thereof will be omitted.

FIG. 1 shows a system diagram of the present invention.

In FIG. 1, 11 is a heating device having the same function as in FIG. A recovery means 20 is a heating device 11. A control unit 21 that controls the heat transfer means 189 and the recovery means 19 is a switch that switches the start and stop of heating operation. As shown in the flowchart of FIG. 2, when a start signal is sent by the S/F notch 21, the heating operation section 22 drives the heat transfer means 18 to start the heating operation. On the other hand, when a stop signal is sent by the switch 21,
At the same time as the heating operation section 22 stops driving the heat transfer means 18, the recovery operation section 23 drives the recovery means 19 to perform a recovery operation for a predetermined time. After the predetermined time, the collection operation section 2
3 stops the drive of the recovery means 19, returns to the initial heating operation stop state, and repeats the above operation again. Therefore, any leakage of refrigerant from within the heating cycle will be compensated for by the recovery operation after the heating operation ends, and there will be no waiting time for the recovery operation at the start of the heating operation, so the user can start the heating operation at the same time. You can start driving.

Next, another embodiment of the present invention will be described with reference to FIGS. 3 and 4. This embodiment differs from the previous embodiments in that the control unit 20 includes a timer that starts counting after the recovery operation unit has finished operating. As shown in the flowchart of FIG. 4, after the recovery operation ends, the timer 24 starts counting and the heating is stopped. When the timer reaches the set value during this heating stop, the timer is set and the recovery operation section 23
performs collection time operation for a predetermined period of time. After the recovery operation is completed, the timer 24 restarts counting and returns to the heating stop state. That is, every time the heating stop time reaches a set value, the recovery operation is performed to compensate for the shortage of refrigerant in the heating cycle. According to this configuration, not only is there no waiting time at the start of operation, but also the amount of decrease in the amount of refrigerant can be reduced even when heating operation is stopped for a long time.

Effects of the Invention As described above, the air conditioner of the present invention performs pump-down operation after the end of heating operation to compensate for the lack of refrigerant in the heating cycle, so when the user performs the operation to start heating operation, Heating operation can be started immediately without waiting time, improving usability.

[Brief explanation of the drawing]

FIG. 1 is a circuit configuration diagram of an air conditioner according to an embodiment of the present invention, FIG. 2 is a flowchart of the same control circuit, FIG. 3 is a circuit diagram of an air conditioner according to another embodiment, and FIG. The flowchart of the control circuit, FIG. 5, is a circuit configuration diagram of a conventional air conditioner. 11... Heating device, 13... Heat exchanger, 18... Heat transfer means, 19... Recovery means, 20... Control Section, 21... Switch, 22... Heating operation section, 23...
Collection operation department, 24...timer. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
figure

Claims (2)

[Claims] (1) A heating device that heats a heat medium; a heat exchanger that heats air by exchanging heat with the heat medium; a heat transfer means that circulates the heat medium between the heating device and the heat exchanger to perform heating; a recovery means for recovering the medium to the heating device; a control section for controlling driving of the heating device, the heat transfer means, and the recovery means; the control section includes a switch for switching start/stop of heating operation; An air conditioner comprising: a heating operation section that drives the heating device and the heat transfer means in response to a start signal from a switch; and a recovery operation section that drives the recovery means for a predetermined period of time in response to a stop signal from the switch. (2) The air conditioner according to claim 1, wherein the control section includes a timer that transmits an operation signal to the recovery operation section when a predetermined period of time is counted from the end of operation of the recovery operation section.