JPS5845465A - Comtroller for operation of air conditioner with refrigerant heating apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an operation control device for an air conditioner equipped with a refrigerant heater that improves heating capacity at low outside temperatures. By radiating the preheating heat indoors instead of radiating it to the outside air,
The purpose is to improve system efficiency.

Conventionally, when the air conditioners in this building heated the refrigerant to form a heating cycle, the pressure wJ machine was also stopped at the same time as the refrigerant heater was stopped. Therefore, the preheating of the refrigerant heater during that time is naturally radiated to the outside air, which has the disadvantage of extremely low system efficiency.

The present invention eliminates the drawbacks found in the above-mentioned conventional air conditioners.

Hereinafter, the present invention will be described with reference to the accompanying drawings showing one embodiment thereof.

First, the structure of the refrigeration cycle will be explained with reference to FIG.

In the figure, reference numeral 1 denotes an indoor unit, which includes an indoor heat exchanger 3, an indoor blower (not shown), a temperature detection element 11 for detecting suction temperature, and the like. B is an outdoor unit that is paired with the indoor unit, and includes a compressor 1. Four-way switching valve2. Outdoor heat exchanger 6 and multiple capillary tubes 41L and 4b.

A check valve 40 that controls the flow of the capillary tube 4b depending on cooling or heating. Check valve 4d and on-off valve 8 that opens during heating
an on-off valve 16 that opens during cooling or heating and closes when heating the refrigerant; an on-off valve 7 that opens when heating the refrigerant; an on-off valve 9 that connects the discharge and suction of the compressor 1;
It consists of a check valve 4e and the like provided on the suction side of the pump. C is a refrigerant unit, which includes a refrigerant heater 6 in which a heat medium 6a such as water is sealed, a gas burner 6a that heats the refrigerant heater 6, and a control pulp 1o that controls the supply of gas fuel. It consists of an outdoor blower (not shown) and the like. This gas burner 6b may be replaced with other combustion equipment, such as an electric heater, if necessary.

Next, a schematic electric circuit will be explained with reference to FIG.

Components that are the same as those in FIG. 1 are given the same numbers, and electrical components such as indoor blowers, outdoor blowers, and four-way switching valves are referred to as the gist of the present invention.

Therefore, the illustration and explanation will be omitted, and the main parts configured during the refrigerant heating operation will be explained. .

In the figure b, 12 is the output from the temperature detection element □12
a, 12b. 14 is a delay timer, which is composed of a timer section 141L and contacts 14b-140-14d. 16 is a power source.

In the above configuration, during heating operation in which the refrigerant heater 6 is operated, the refrigerant discharged from the compressor 1 is transferred to the four-way switching valve 2.
It passes through the indoor heat exchanger 3, is heated by the refrigerant heater 6, and is compressed f
lJ! Configure the refrigeration cycle returning to step 1.

During heating operation in which this refrigerant heater 6 is operated,
When the indoor temperature rises and the thermostat 12 issues a stop signal, the valve 10 closes to stop the refrigerant heater 6, and at the same time the contact 121L of the thermostat 12 opens.
Contact 12b closes. As a result, the delay timer 14 operates to close the contact 146 and open the contact 14 (1).Then, after the set time, the timer section 141L activates the contact 14b and 14.
0 and stop the compressor 1.

Therefore, by stopping the compressor after a set time has elapsed after the refrigerant heater 6 is stopped, the preheated solvent heater 6 is radiated into the room without being radiated to the outside air.

Note that the thermostat 12 of this embodiment is replaced with a pressure switch 13 that detects the pressure in the refrigeration cycle as shown in FIG.
Alternatively, it may be a thermostand (not shown) that detects the temperature during the refrigeration cycle.

As is clear from the above embodiments, the operation control device for an air conditioner equipped with a refrigerant heating device according to the present invention connects a compressor, a four-way switching valve, an indoor heat exchanger, a pressure reducing device, and an outdoor heat exchanger, respectively. A heat pump type refrigeration cycle is constructed, and a part of this refrigeration cycle is provided with a refrigerant heater that heats the refrigerant, and a thermostat that controls the operation of this refrigerant heater. The pressure W3 machine is stopped after a set time has elapsed after the heater stop signal is output, and the preheated heat generated during operation of the refrigerant heater is not radiated to the outside air, but is radiated into the room, improving system efficiency. Furthermore, since the compressor 1 is only delayed and stopped as a means to prevent preheating of the refrigerant heater from escaping, it has various advantages such as low cost and high efficiency. .

[Brief explanation of drawings]

FIG. 1 is a refrigeration cycle diagram of an air conditioner equipped with a refrigerant heating device according to an embodiment of the present invention, and FIG. 2 is an electric circuit diagram of the same operation control device. 1... Compressor, 2... Four-way switching valve, 3
...Indoor heat exchanger, 4 units, 4b...Capillary scoop, 6...Outdoor heat exchanger, 6.
... Refrigerant heater, 11 ... Temperature detection element, 12 ... Thermostat, delay, timer.

Claims (1)

[Claims] Compressor, four-way switching valve, indoor heat exchanger, pressure reducing device. The outdoor heat exchangers are connected to each other to form a single heat pump refrigeration cycle, and a part of this refrigeration cycle is provided with a refrigerant heater that heats the refrigerant, and a thermostat that controls the operation of the refrigerant heater. An operation control device for an air conditioner, comprising: a refrigerant heating device that stops the compressor after a set time elapses after outputting a refrigerant heater stop signal of the thermostand.