JPH074719A - Defrosting device for air conditioner - Google Patents

Abstract

PURPOSE:To provide a defrosting device for air conditioner, which can perform a defrosting operation even during a heating operation, and does not give an uncomfortable feeling. CONSTITUTION:A refrigerant is heat-exchanged by a solar heat accumulating unit 4 for which a heat-exchanager 2 to heat between a heat accumulating material 1 to accumulate solar heat and a refrigerant, and a pump 3 to circulate the refrigerant are provided. A heat accumulating refrigerant circuit 7, which through-circulates the refrigerant which is heat-exchanged by the solar heat accumulating unit 4, in parallel with a refrigerating cycle circuit 6 provided in an outdoor heat-exchanger 5, is provided. Then, it is constituted in such a manner that a defrosting is performed by flowing the refrigerant which is heated by solar heat by operating the pump 3, when a frost formation takes place on the outdoor heat-exchanger 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a defroster for an air conditioner during heating.

[0002]

2. Description of the Related Art In recent years, with the spread of air conditioners capable of heating operation, there is an increasing demand for a defrosting device for an air conditioner capable of performing defrosting operation without stopping heating operation. The configuration of a conventional defroster for an air conditioner of this type will be described with reference to FIG.

As shown in the figure, a compressor 102, a four-way valve 103, an outdoor heat exchanger 104, a capillary tube 105, and a first three-way valve 106 are sequentially connected to the outdoor unit 101 side, and indoor heat on the indoor unit 107 side is connected. Connected to the exchange 108,
The refrigeration cycle circuit was returned from the indoor heat exchanger 108 to the compressor 102 via the second three-way valve 109 and the four-way valve 103. Then, the heat exchange fan motor 110
A coil temperature sensor 111 for detecting the temperature of the refrigerant is provided in the gas side pipe on the compressor 102 side of the outdoor heat exchanger 104, and the compressor 102 is controlled by the temperature detected by the coil temperature sensor 111. A control circuit 112 for controlling the four-way valve 103 and the heat exchanging fan motor 110 to perform cooling or heating operation is provided.

In the above structure, when the temperature of the outdoor heat exchanger 104 drops during the heating operation, the outdoor heat exchanger 1
In order to prevent frost on 04, the four-way valve 103 was switched, the heating operation was stopped, the defrosting operation, that is, the cooling operation was performed, and the outdoor heat exchanger 104 was warmed to perform the defrosting operation.

[0005]

In such a conventional defroster for an air conditioner, when heating operation is performed in a situation where the outside air temperature is extremely low, frost prevention control on the outdoor heat exchanger 104 is frequently performed. Therefore, there is a problem that the indoor temperature is lowered during the defrosting operation, the heating efficiency is deteriorated, and discomfort is given.

The present invention solves the above problems, and an object thereof is to provide a defrosting device for an air conditioner which enables defrosting operation even when the air conditioner is in heating operation and does not cause discomfort. And

[0007]

In order to achieve the above object, a defroster for an air conditioner of the present invention has a compressor, a four-way valve, an outdoor heat exchanger, a capillary tube, a three-way valve, etc. on the outdoor unit side. A refrigeration cycle circuit provided with an indoor heat exchanger provided on the indoor unit side, a solar heat storage unit provided with a heat exchanger that exchanges heat with a heat storage material that stores solar heat and a refrigerant, and a pump that circulates the refrigerant, A heat storage refrigerant circuit that circulates the refrigerant heat-exchanged by the solar heat storage unit in parallel with the refrigeration cycle circuit provided in the outdoor heat exchanger, and the pump is used when the outdoor heat exchanger is frosted. A configuration is adopted in which the refrigerant of the solar heat storage unit is circulated in the heat storage refrigerant circuit to defrost.

[0008]

According to the present invention, when the heating operation is performed, the temperature of the outdoor heat exchanger is lowered and the solar heat storage unit is operated in a frosted state during the heating operation, and the refrigerant heated by the solar heat and having a high temperature is stored in the heat storage refrigerant circuit. The outdoor heat exchanger through which the heat storage refrigerant circuit passes is heated and defrosted.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. The same parts as those in the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in the figure, the heat storage material 1 for storing solar heat, the heat exchanger 2 for exchanging heat with the refrigerant, and the solar heat storage unit 4 provided with a pump 3 for circulating the refrigerant are used to exchange the refrigerant with the outdoor heat. A heat storage refrigerant circuit 7 is provided which circulates in parallel with the refrigeration cycle circuit 6 provided in the container 5.

The control circuit 8 controls the compressor 102, the four-way valve 103, and the heat exchanger fan motor 110 by the temperature detected by the coil temperature sensor 111 so as to perform cooling or heating operation. When the temperature detected by the coil temperature sensor 111 is low at the time of heating operation and a frosting state occurs, the pump 3 in the solar heat storage unit 4 is operated via the control circuit 8. Constitute.

In the above structure, when the outdoor heat exchanger 5 is in a frosted state during the heating operation and the coil temperature sensor 111 detects a low temperature, the pump 3 in the solar heat storage unit 4 is passed through the control circuit 8. Is operated, the refrigerant heated by solar heat circulates in the heat storage refrigerant circuit 7, passes through the outdoor heat exchanger 5, and warms the outdoor heat exchanger 5 for defrosting.

As described above, according to the defroster for an air conditioner of the embodiment of the present invention, the refrigerant of the solar heat storage unit 4 in which the refrigerant is heated in the outdoor heat exchanger 5 in parallel with the refrigeration cycle circuit 6 by solar heat Is passed through the heat storage refrigerant circuit 7, the solar heat storage unit 4 is operated when the outdoor heat exchanger 5 is in a frosted state, and the heat storage refrigerant circuit 7 passing through the outdoor heat exchanger 5 is connected to the heat storage refrigerant circuit 7. Since the defrosting is performed by sending the high temperature refrigerant, the defrosting operation can be performed even during the heating operation.

[0014]

As is apparent from the above embodiments, according to the present invention, the refrigerant heated by the solar heat storage unit is configured to pass through the outdoor heat exchanger via the heat storage refrigerant circuit. Since the solar heat storage unit can be operated to defrost when the outdoor heat exchanger is frosted, defrosting operation can be performed without stopping heating operation, and comfortable heating without lowering heating efficiency in the room It is possible to provide a defrosting device for an air conditioner that can perform the above.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a configuration of a defroster for an air conditioner according to an embodiment of the present invention.

FIG. 2 is a circuit diagram showing a configuration of a conventional defrosting device for an air conditioner.

[Explanation of symbols]

 1 Heat Storage Material 2 Heat Exchanger 3 Pump 4 Solar Heat Storage Unit 5 Outdoor Heat Exchanger 6 Refrigeration Cycle Circuit 7 Heat Storage Refrigerant Circuit 102 Compressor 103 Four Way Valve 105 Capillary Tube 106 Three Way Valve 108 Indoor Heat Exchanger 109 Three Way Valve

Claims (1)

[Claims] 1. A refrigeration cycle circuit in which a compressor, a four-way valve, an outdoor heat exchanger, a capillary tube, a three-way valve, etc. are provided on the outdoor unit side, and an indoor heat exchanger is provided on the indoor unit side,
A solar heat storage unit provided with a heat exchanger that exchanges heat with a heat storage material that stores solar heat and a refrigerant and a pump that circulates the refrigerant, and a refrigerant that has been heat-exchanged by the solar heat storage unit are provided in the outdoor heat exchanger. A heat storage refrigerant circuit that circulates in parallel with the refrigeration cycle circuit is provided, and the pump is operated during frost formation of the outdoor heat exchanger to circulate and defrost the refrigerant of the solar heat storage unit in the heat storage refrigerant circuit. Defroster for air conditioners.