JPS5869332A - Controlling device of heating apparatus - Google Patents

Abstract

PURPOSE:To improve the stability and reliability of coolant and a pump toward heat by a method wherein a timing element to delay the action of a coolant heater than that of a coolant circulating pump and the like are provided in the heating apparatus utilizing the latent heat of the coolant generated by being heated in a coolant heater. CONSTITUTION:When a power switch 6 is turned on and room temperature is set with the room temperature setting variable resistance 19 of a remote controller 24 and as well as, for example, an air flow change-over switch 21 (requesting strong wind level) out of switches 21-23 is turned ON and then a start-stop switch 20 is turned ON, the microcomputer 13 of a controlling circuit 10 brings an output terminal O4 to the high level, resulting in energizing the coolant circulating pump 3 and a pump controlling relay 11. After the elapse of the fixed period of time, an output terminal O5 goes to the high level, resulting in putting a heat source controller 33 in respect to the coolant heater in order to start the evaporating action of coolant. At the same time, output terminals O1 and O2 go to the high level, resulting in energizing a starting relay 7 and a speed change- over relay 8 in order to rotate an indoor fan 2 for starting heating operation.

Description

[Detailed Description of the Invention] The present invention provides heat to the refrigerant from the heat source during heating. Added latent heat of refrigerant?
The present invention relates to a heating device that utilizes heating equipment to heat the room.

However, when heating with this device, the air is used as a heat pump heat source, so in winter, in cold regions, or when the outside temperature drops in the morning or evening, sufficient enthusiasm may not be obtained and the heating capacity may decrease. It also had the disadvantage that the temperature of the heating load was slow to rise.

For this reason, as a solution to the problems of air-conditioning equipment using the heat pump cycle mentioned above, an electric heater is installed in the indoor unit. There are devices that can be attached to provide supplementary heating. However, those that use electric heater sound lack capacity as an auxiliary heat source for space heating because the electric capacity of the heater is small. Also electric capacity? Extra heat costs more to operate than other heat sources.

Furthermore, heating and cooling systems using a heat pump cycle have the problem that the outdoor heat exchanger absorbs heat from the atmosphere, which causes frost formation and reduces the heating capacity.

In addition, as a means to compensate for the lack of heating capacity, a combustion device is built into the indoor unit, heating is performed using a combustion heat exchanger, the combustion exhaust gas from the combustion device is discharged outside the room, and a separate cooling unit is installed for cooling. Some air-conditioning systems provide air conditioning, but these air-conditioning systems have a combustion device that is an indoor unit, so there is a risk of explosion, and they also have piping for intake of combustion air or exhaust of combustion exhaust gas. There are 9 installation problems required.

In order to deal with the drawbacks of the conventional heating device, the present invention includes a refrigerant heater as a heat source for heating, and provides a series circuit of the refrigerant heater and a refrigerant circulation pump that circulates the heated and evaporated refrigerant. The heating system consists of a closed circuit and an indoor heat exchanger that performs heat dissipation, and is a timed element so that the refrigerant heater has a delayed operation than the refrigerant circulation pump. The stability of the refrigerant and the refrigerant circulation pump against heat can be improved by providing a detection means r for detecting when the amount of refrigerant f' sent out by the refrigerant circulation pump reaches a certain amount or more.

This will further improve reliability and safety.

The control device for a heater according to the present invention will be explained below with reference to FIGS. 1 to 6. Explained for reference.

As shown in Figure 1, the heater consists of an indoor unit and an outdoor unit B. The indoor unit has an indoor heat exchanger 1 that performs heat dissipation action 7, and the heat exchange capacity of the indoor heat exchanger 1. The indoor heat exchanger 1 is connected to the outdoor unit B through refrigerant piping. The outdoor unit P is composed of a refrigerant circulation pump 3 that circulates the refrigerant sound, a refrigerant heater 4 that performs the evaporation action 7 of the refrigerant, and a heat source 5 for heating the refrigerant.

FIG. 2 is an electrical circuit diagram of the heater of the present invention.

A power switch 6 inserted in series with the power supply P, and an indoor 7 amplifier 2 inserted in parallel with the power supply on the load side from the power switch 6.
A relay 7 for starting the indoor fan 2, a speed switching relay 8 that can select the speed of the indoor fan 2 and an air volume of 1 degree or more, and a relay 8 for switching the speed of the indoor fan 2 that can select the air volume of ``ψ'' or 11 or less. It consists of a relay 9, a control circuit 10 connected in parallel to the circuit of the indoor fan 2, and a series circuit of a relay 11 for controlling the refrigerant circulation pump 3 and the pump connected in parallel to the control circuit 10. .

Figures 3 and 4 show the heating machine's control circuit 1o 5t'-
” This is an example. In other words, as shown in FIG. 3, the control circuit 1
0 includes a power supply circuit 12, a microcomputer 13 for determining signal processing, a room temperature detection means 14, a resistor 15,
16, 17, a room temperature overturn circuit consisting of a comparator 18, and a room temperature setting variable resistor 19 selected by the user. Run/stop switch 20° Air volume selector switch 21 (strong L22 (medium)
, 23 (weak), resistors 25, 26, 27, 28 inserted between each air volume changeover switch 20, 21, 22, 23 of the remote controller 24 and the power supply, and a starting relay 7, Speed switching mIJ relay 8,9° Drive circuit that drives 11 relays for pump control 29130.31.3
2 and a heat source controller 33.

In FIG. 4, the same elements as in FIG. 3 are given the same numbers as in FIG. 3, and further include a refrigerant flow rate detection circuit detection means 34, a resistor 35. A flow rate detection circuit consisting of an inverter 36 and an inverter 37 is provided.

FIG. 5 is a time chart of the control device 6t'-
' 0 Next, I will explain the operation of the configuration of the present invention.

First, the operation of the refrigerant will be explained with reference to FIG. Refrigerant 19 is sent to the refrigerant circulation pump 3 to the refrigerant heater 4, and evaporation is performed by the heat received from the electric heat source 6.

Further, the refrigerant is sent to the indoor heat exchanger 1, where it undergoes a heat dissipation action, and then returns to the refrigerant circulation pump 3 again. Next, Fig. 2 9
FIGS. 3 and 4 will be explained.

After the power switch 6 is turned on, set the room temperature on the remote controller 24, set the air volume, and turn on the run/stop switch 20.
do. Here, the room temperature is set by the room temperature setting variable resistor 19.
Then, the output of the ratio converter 18 becomes 1° Hi" level and is input to the input terminal check 0 of the microcomputer 13.
ON”.Next, the air volume selector switches 21, 22
．． Among 23, for example, 21 (strong) i"ON"1. driving·
When the stop switch 2o2 is turned ON (, -z, the input terminal check j+I2 of the microcomputer 13 goes to the 9ゞLo'' level, and the sound is detected despite the user's instructions.Then, based on the signal from the input terminal, the microcomputer 13 circulation pump 3. Activate the pump control relay 11r. Then, after the refrigerant is circulated by the refrigerant circulation pump 3 for t time,
The output terminal 65 of the microcomputer 13 is ``H1''
The heat source controller 33 operates. The evaporation action of the refrigerant starts. t1 The output terminal 01゜ of the RE microcomputer 13 becomes +j ui" level, and the starting relay 7 and the speed switching relay 8 are energized. The indoor fan 2 rotates and starts heating operation. Yes, and FIG. 6 is a time chart of the operation sequence described above.

If the refrigerant circulation pump 3 and the refrigerant heater 4 operate at the same time, the refrigerant will be superheated by the heat from the heat source 6 and the refrigerant will be recirculated. The refrigerant may decompose inside the pipe. Particularly, depending on the temperature, there is a risk that the heat exchanger portion of the refrigerant heater 4 will melt, and if the refrigerant leaks during heat exchange, there is a danger that it will decompose into toxic substances such as hydrogen chloride and fluorophosgene.

Moreover, the pressure in the circulation pipe of the refrigerant heater 4 suddenly increases. That is, the pressure difference between the discharge side and the suction side of the refrigerant circulation pump 3 becomes large, and the starting current of the refrigerant circulation pump motor becomes large, resulting in a decrease in reliability and a large variation in the characteristics of the pump itself, which is disadvantageous.

However, if the heater control device of the present invention is engineered, the refrigerant circulation pump, refrigerant heater, and indoor heat exchanger are directly connected in sequence to form a closed circuit, and the refrigerant circulation pump operates in advance of the refrigerant heater. By controlling the time so that a sufficient amount of refrigerant flows out of the refrigerant heater, a sufficient amount of refrigerant is secured even if it receives heat from the heat source 6, so superheat does not occur, and a sudden pressure rise is prevented. Therefore, the effect that refrigerant decomposition does not occur and the pump is not damaged can be obtained.

FIG. 4 shows another embodiment of a heater control device that can achieve similar effects, and its operation will be explained.

From the remote control 24, "-- is the room temperature?" When the power is set, the air volume is selected, and the run/stop switch 20 is pressed, the pump control relay 11 is energized, and the refrigerant circulation pump 3 is activated. Refrigerant? Refrigerant heater 4V?: Sending 'T/b0 and detecting means 34 such as a float switch or flow rate switch for detecting the refrigerant flow rate provided on the outlet side of the refrigerant heater 42 detects that the appropriate and required flow rate has been reached. This detection KLr
), the output of the inverter 37 from the LO″ level to II
Hl" level and is input to the input terminal X5 of the microcomputer 13. When inputted to the microcomputer 13, the output terminal 65 becomes the H4n level, the heat source controller 33 is activated, and the refrigerant heater 4 is operated. enter the state.

In this way, when the detection means 34 detects the appropriate refrigerant flow rate, accidents such as abnormal heating of the refrigerant itself and decomposition due to this can be prevented, and adverse effects on the refrigerant circulation pump 3 can be avoided. It can be eliminated.

As is clear from the above embodiments, if the control device for a heater of the present invention is modified, the operation of the refrigerant circulation pump J:v operation of the refrigerant heater? By providing a time-limiting element to delay or a detection means to detect the refrigerant flow rate, the stability, reliability, and safety against heat of the refrigerant and refrigerant circulation pump can be dramatically improved.

[Brief explanation of drawings]

Figure 1 is a refrigeration circuit diagram of a heater, and Figure 2 is an embodiment of the present invention? Electrical circuit diagrams of the heater control device shown in Figures 3 and 4.
The figure is a control circuit diagram of the control device, and FIG. 6 is a time chart of the control device. 1... Indoor heat exchanger, 3... Refrigerant circulation pump, 4... Refrigerant heater, 10...
Control circuit, 34...detection means.

Claims (3)

[Claims] (1) An indoor heat exchanger that performs heat dissipation, a refrigerant circulation pump that circulates refrigerant, and a refrigerant heater that performs evaporation of refrigerant? Directly connected sequentially, said refrigerant circulation pump? A heater control device equipped with a control circuit that operates in advance of the refrigerant heater. (2) The control circuit has a timing element that causes the refrigerant heater to operate with a delay from the refrigerant circulation pump.
A control device for a heating machine as described in Section 1. (3) The control circuit sends out n by a refrigerant circulation pump.
2. The heating machine control device according to claim 1, further comprising a detection means for detecting a sound when the amount of refrigerant exceeds a certain amount.・