JP3818139B2 - Refrigeration air conditioner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a refrigerating and air-conditioning apparatus for performing heat exchange between refrigerants of a heat source side refrigerant cycle and a usage side refrigerant cycle via a heat exchanger, and cooling and heating a house or the like in the usage side refrigerant cycle.
[0002]
[Prior art]
In a refrigeration air conditioner that uses the heat collected from the heat source side refrigerant cycle to produce refrigerant for cooling and heating in the use side refrigerant cycle and circulates it in the indoor radiator to cool and heat, heat is collected in the heat source side refrigerant cycle. Since the amount of heat that can be generated depends on the outside air temperature, the heating capacity is reduced when the outside air temperature is low, making it difficult to obtain the required heating atmosphere. For example, in the heat pump type air conditioning technology disclosed in Japanese Patent Application Laid-Open No. 55-20315, a positive temperature coefficient thermistor heater is arranged in the indoor heat exchanger to correct the heating capacity decrease when the refrigerant temperature decreases. It is solved by supplementing with a characteristic thermistor heater. In this technique, the refrigerant temperature of the indoor heat exchanger is monitored, and when the refrigerant temperature falls below the set temperature, a positive temperature coefficient thermistor heater is operated as an auxiliary heat source to compensate for the lack of heating capacity.
[0003]
Japanese Patent Laid-Open No. 2000-2474 discloses that a heat source side refrigerant cycle including a boiler dedicated to heating is added to a heat source side refrigerant cycle dedicated to cooling, and the boiler is operated during heating to use heat necessary for heating on the use side refrigerant A refrigeration air conditioner is shown that can be supplied to a cycle. This refrigeration air conditioner has a heat source side refrigerant cycle dedicated to cooling and a heat source side refrigerant cycle dedicated to heating including a boiler, so there is no need for defrosting operation, and the refrigerant temperature of the use side refrigerant cycle is reduced by defrosting operation. I will not come.
[0004]
[Problems to be solved by the invention]
In the above-described conventional heat pump type air conditioning technology, even when the indoor heating load is small in the case of heating operation, the refrigerant temperature of the use side refrigerant cycle decreases during defrosting operation, etc., so it is not necessary by the positive temperature coefficient thermistor heater There is a problem that it is uneconomical because the heat is replenished.
[0005]
On the other hand, those having a heat source side refrigerant cycle dedicated to heating require a heat source machine such as a kerosene boiler, a gas boiler, or an electric boiler, which has a problem that the configuration is complicated, the cost is high, and the installation space is expanded.
[0006]
The present invention has been made to solve the conventional problems, and the problem is to obtain a refrigerating and air-conditioning apparatus that can realize comfortable cooling and heating that does not increase the installation space at low cost. , Ru Oh be to promote the improvement on the safety of the device.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the invention of claim 1 is directed to a heat source side refrigerant by interposing a heat exchanger between a heat source side refrigerant cycle for circulating the heat source side refrigerant and a usage side refrigerant cycle for circulating the usage side refrigerant. A refrigerating and air-conditioning apparatus that performs cooling and heating in the use-side refrigerant cycle by thermally connecting the use-side refrigerant and the use-side refrigerant to the refrigerant storage tank constituting the use-side refrigerant cycle see embedded heating means for heating the use-side refrigerant of the inner, employing a means for mounting a filter made of incombustible material in the connection port.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
The present embodiment shown in FIGS. 1 to 3 collects heat between a heat source side refrigerant cycle for circulating the heat source side refrigerant and a usage side refrigerant cycle for circulating the usage side refrigerant as shown in FIG. The present invention relates to a refrigerating and air-conditioning apparatus that performs cooling and heating in a use side refrigerant cycle by interposing a heat exchanger 1 for heat and thermally connecting a heat source side refrigerant and a use side refrigerant through the heat exchanger 1. is there. The heat source side refrigerant cycle is a heat pump type refrigeration cycle for cooling the heat source side refrigerant, and includes a heat exchanger 3 placed outside the outer shell 2 of the refrigeration air conditioner, a compressor provided in the outer shell 2, and a flow control valve. (Not shown) and a heat source side refrigerant circulation closed circuit 4 that goes around the primary flow path of the heat exchanger 1.
[0015]
The usage-side refrigerant cycle is configured as a usage-side refrigerant circulation closed circuit 5 that circulates a usage-side refrigerant such as an antifreeze liquid, and a refrigerant storage tank 6 that stores the usage-side refrigerant and a circulation pump that circulates the usage-side refrigerant in the refrigerant storage tank 6. 7 and the external pipe 8 through the secondary flow path of the heat exchanger 1 to return to the refrigerant storage tank 6. The components excluding the external pipe 8 and the heat exchanger 1 are housed in the outer shell 2 of the refrigeration air conditioner.
[0016]
The refrigerant storage tank 6 is provided with a forward connection port 9 and a return connection port 10. The forward connection port 9 is connected to the suction side of the circulation pump 7, and the return connection port 10 It is connected to the secondary flow path of the exchanger 1. On the discharge side of the circulation pump 7, the forward piping of the external piping 8 is connected to a connection port 11 provided in the outer shell 2, and the outer shell 2 is connected to the inlet side of the secondary flow path of the heat exchanger 1. The return side pipe of the external pipe 8 is connected to the connection port 12 provided in the pipe. The heat source side refrigerant of the heat source side refrigerant cycle and the use side refrigerant of the use side refrigerant cycle are independent of each other and are not thermally mixed but are thermally connected by the heat exchanger 1.
[0017]
The external pipe 8 is configured as a utilization-side refrigerant circulation system by an indoor radiator 13 connected to the forward-side pipe and the return-side pipe. The indoor radiator 13 includes one or more fan coil units that perform cooling and heating functions by circulating or heating indoor air and a floor heating panel that performs cooling and heating functions using radiation, or a set or a plurality of sets. A radiant panel is connected.
[0018]
The refrigerant storage tank 6 is configured as a heat-resistant sealed container as shown in FIG. 2, and a plurality of ceramic heaters or electric sheath heaters 14 are incorporated as heating means for heating the refrigerant in the tank from one side. A filter 15 made of a non-combustible material in a cylindrical shape is attached to the forward connection port 9 of the refrigerant storage tank 6 so that the filter 15 can be attached and detached by inserting and removing from the attachment / detachment port 16 on the upper part of the refrigerant storage tank 6. The attachment / detachment port 16 of the filter 15 is closed by a flange 17 with a connection port for attaching an accompanying device such as a pressure gauge, an expansion relief valve, or an automatic air vent valve attached to the refrigerant storage tank 6. The flange 17 with the connection port is fastened and fixed to the upper part of the refrigerant storage tank 6 by screws with the packing 18 interposed therebetween.
[0019]
As shown in FIG. 3, the refrigerant storage tank 6 is covered with a heat insulating jacket 19 made of foamed polystyrene to insulate the refrigerant. The inside of the heat insulating jacket 19 has a flame retardant structure 20 by sticking a heat insulating material such as a flame retardant felt, and the heat spreading of the heat insulating jacket 19 due to empty cooking or the like is prevented.
[0020]
The refrigerating and air-conditioning apparatus is equipped with a control means 21 including a microcomputer for controlling the circulation pump 7, the compressor, the electric sheathed heater 14, and the like. The control means 21 has a setting switch for setting the cooling mode and the heating mode, A controller having display means for displaying an operation state or the like by an LED or a liquid crystal is connected to be able to exchange signals by a signal line or an infrared signal. The control means 21 takes in the output of the temperature detection means 22 that detects the temperature of the use-side refrigerant at the outlet of the refrigerant storage tank 6 as control information.
[0021]
Further, the indoor radiator 13 is provided with a controller and a room temperature detecting means for detecting the room temperature, and the flow rate of the refrigerant is moved by operating the controller so that the room temperature becomes the set temperature. While performing feedback control, it transmits operation information, set temperature, and room temperature as control information to the control means 21 of the refrigeration air conditioner.
[0022]
When the heating mode is set by the controller of the refrigerating and air-conditioning apparatus, the control means 21 performs the heating operation of the heat source side heat pump system, and energizes the electric sheathed heater 14 as necessary. The control means 21 takes in the operation information from the controller of the indoor radiator 13 and can heat the temperature of the use-side refrigerant sent to the use-side refrigerant cycle when an operation request signal is input from any of the indoor radiator 13. The heating operation of the heat source side heat pump system and energization to the electric sheath heater 14 are controlled so as to reach the temperature, the circulation pump 7 is moved, and the utilization side refrigerant is circulated in the utilization side refrigerant cycle. When there is no operation request signal from the indoor radiator 13 side, the circulation pump 7 is stopped.
[0023]
For example, when four electric sheath heaters 14 having a capacity of 1 kilowatt are provided, they are energized in an appropriate combination according to the load of the house, and heating capacity is secured while reducing power consumption. Since the electric storage heater 14 that is a heat source during heating operation is incorporated in the refrigerant storage tank 6, the use-side refrigerant can be efficiently heated and has a heat source-side refrigerant cycle dedicated to heating by a kerosene boiler, a gas boiler, or the like The structure is simpler, the cost is lower, and the installation space is reduced. In the heating mode, the heat capacity of the use-side refrigerant in the refrigerant storage tank 6 can prevent the temperature decrease of the use-side refrigerant in the defrosting operation, and at the same time, when the heat capacity is insufficient, it can be heated by the electric sheath heater 14. Furthermore, the shortage of capacity in the heating operation of the heat source side heat pump system when the outside air temperature decreases can be compensated. Since the refrigerant storage tank 6 is wrapped with the heat insulating mantle 19, the temperature decrease of the use-side refrigerant in the refrigerant storage tank 6 is small and the power consumption is also small. Even if the food is cooked empty, the flame-retardant structure 20 of the heat insulating mantle 19 prevents the heat insulation outer mantle 19 from spreading and the safety is maintained. Moreover, since the filter 15 is also made of a non-combustible material, the safety is ensured without being burned even when cooking empty.
[0024]
Maintenance of the filter 15 can be performed by removing the flange 17 with the connection port and attaching it to the attachment / detachment port 16 with the associated equipment attached. Moreover, since the connection ports 11 and 12 with the external pipe 8 are provided inside the outer shell 2 of the refrigeration air conditioner, the external pipe 8 is connected toward the floor below the installation place, or on the side surface of the outer shell 2. The external pipe 8 can be connected toward the front, and the degree of freedom of the pipe is high.
[0025]
On the other hand, when the cooling mode is set by the controller of the refrigerating and air-conditioning apparatus, the control means 21 moves the heat source side refrigerant cycle, puts the electric sheath heater 14 in the disconnection state, and stores the operation information from the controller of the indoor radiator 13. Take in. When an operation request signal is input from any of the indoor radiators 13, the heat source side refrigerant cycle is controlled so that the temperature of the usage-side refrigerant sent to the indoor radiator 13 can be cooled, for example, 7 ° C. When there is no operation request signal from the indoor radiator 13 side, the circulation pump 7 is stopped.
[0026]
【The invention's effect】
According to the first aspect of the present invention, it is possible to obtain a refrigeration air conditioner that can realize a comfortable heating that does not increase the installation space at low cost, and can prevent the spread of the filter due to empty cooking or the like .
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing a refrigerating and air-conditioning apparatus according to an embodiment.
FIG. 2 is an exploded perspective view showing a configuration of a refrigerant storage tank of the refrigerating and air-conditioning apparatus according to the embodiment.
FIG. 3 is an exploded perspective view showing a configuration around a refrigerant storage tank of the refrigerating and air-conditioning apparatus according to the embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Heat exchanger, 2 Outer shell, 3 Heat exchanger, 4 Heat source side refrigerant circulation closed circuit, 5 Use side refrigerant circulation closed circuit, 6 Refrigerant storage tank, 8 External piping, 11 Connection port, 12 Connection port, 14 Electric sheath heater, 15 Filter, 19 Thermal jacket, 20 Flame retardant structure.

Claims (1)

A heat exchanger is interposed between the heat source side refrigerant cycle for circulating the heat source side refrigerant and the usage side refrigerant cycle for circulating the usage side refrigerant, so that the heat source side refrigerant and the usage side refrigerant are heated via the heat exchanger. A refrigerating and air-conditioning apparatus that performs cooling and heating in a usage-side refrigerant cycle, and a heating unit that heats the usage-side refrigerant in the refrigerant storage tank to a refrigerant storage tank that constitutes the usage-side refrigerant cycle built-in look, refrigeration and air-conditioning apparatus fitted with a filter made of a noncombustible to the connection port.

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