JPS5818137Y2 - Air conditioning equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to the improvement of air-conditioning equipment, and provides an outdoor heat-burning type air-conditioning equipment by using the refrigerant of an air conditioner as a heat transfer medium. The purpose is to carry out the process efficiently.

BACKGROUND ART Conventionally, there is a heat pump type air conditioner as a heating and cooling device using a refrigeration cycle, but this has a drawback that the heating capacity decreases when the outside air temperature decreases during heating operation.

In addition, there are some units that combine a cooling-only air conditioner and an indoor combustion hot air fan, but they have safety issues due to indoor combustion and require work to vent combustion to the outdoors, resulting in cost issues. The situation was not satisfactory in terms of safety.

The present invention provides a heating and cooling device that solves these conventional drawbacks, and examples thereof will be described below.

FIG. 1 shows an embodiment of the refrigerant circuit according to the present invention, and FIG. 2 shows the main parts of a refrigerant heating evaporator and its control circuit.

In the figure, 1 is an indoor unit, 2 is an outdoor unit, 3 and 4 are refrigerant pipes connecting indoor unit 1 and outdoor unit 2, 5 is an indoor heat exchanger, 6 is an indoor fan, 7 is an indoor capillary tube, and 8 is outdoor heat exchanger, 9 outdoor fan, 10 outdoor capillary tube,
11 is a four-way valve, 12 is a compressor, 13 is a refrigerant heating evaporator installed in series with the outdoor heat exchanger 8, and 14 is its combustor.

In addition, in Fig. 2, 15 is a gas cock for fuel control;
6 is a pilot fire, 17 is a main burner, 18 is a main burner 17
This is a solenoid valve that controls the

Reference numeral 19 indicates a main switch for operation, and reference numeral 20 indicates a room temperature controller.

Next, the operation of this device will be explained.

Cooling by heat pump method is carried out by the thread connecting indoor heat exchanger 5, outdoor heat exchanger 8, four-way valve 11 and compressor 12.
Perform heating operation.

Further, during heating operation, when the outside air temperature decreases and the heating capacity decreases, the combustor 14 is operated, the refrigerant heating evaporator 13 is operated, and the operation is switched to refrigerant heat transfer.

At this time, the outdoor fan 9 stops rotating.

During the refrigerant heat transfer operation, the refrigerant discharged from the compressor 12 is condensed and liquefied in the indoor heat exchanger 5, and the heat generated at this time is used to blow warm air into the room by the indoor fan 6.

After that, the refrigerant expands in the capillary tube 7.10, passes through the outdoor heat exchanger 8, and reaches the refrigerant heating evaporator 13.
Here, the refrigerant is heated and evaporated by the combustor 14, then sucked into the compressor 12 via the four-way valve 11, and then discharged again, repeating the cycle.

When heating progresses and the room temperature controller 20 operates and its contacts open, the operation of the combustor 14 is stopped and heating is switched to the heat pump, or the solenoid valve 18 that controls the main burner 17 is closed and the pilot flame 16 is turned off. Can be switched to only combustion.

Therefore, the amount of heating of the refrigerant in the refrigerant heating evaporator 13 is completely eliminated, or is reduced to only the heating amount of the pilot flame, and the indoor heat exchanger 5
heating capacity will decrease.

However, since it does not blow out cold air but blows out low-temperature warm air, there is no need to worry about cold drafts, and the rate of change in room temperature can be kept small.

In this way, when the room temperature controller is activated, combustion is stopped or only the pilot flame is burned and the heating is switched to the heat pump type, so that efficient heating can be performed without causing excessive heating.

In this way, in the present invention, if the room temperature controller operates during heating operation, the main combustion of the combustor of the refrigerant heating evaporator is stopped,
Excessive heating is prevented by switching to heat pump type heating or refrigerant heating evaporator operation using pilot flame combustion in the combustor, and it can be used as an outdoor combustion type device by using refrigerant as a heat transfer medium. At the same time, efficiency during heating can be increased.

[Brief explanation of drawings]

FIG. 1 is a refrigerant circuit diagram of a heating and cooling system according to an embodiment of the present invention, and FIG. 2 shows a refrigerant heating evaporator and its control circuit. 5... Indoor heat exchanger, 8... Outdoor heat exchanger, 11... Four-way valve, 12... Compressor, 13...・Refrigerant heating evaporator, 14...
- Combustor, 16... Pilot flame, 17... Main burner, 18... Solenoid valve, 20... Room temperature controller.

Claims (1)

[Scope of utility model registration request] A refrigerant heater having a combustor is connected in series between the four-way valve and the outdoor heat exchanger of a refrigeration cycle circuit in which a compressor, an outdoor heat exchanger, an indoor heat exchanger, and a four-way valve are sequentially connected, A heating and cooling device comprising: a solenoid valve that controls operation/stop of the combustor during heating operation using the refrigerant heating evaporator; and a room temperature controller that controls energization of the solenoid valve connected to a power source in series with the solenoid valve.