JPS6337636Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is a collection system consisting of a refrigerant circulation closed circuit that sequentially connects a heat collector, an accumulator, a compressor, a condenser, and a thermostatic expansion valve to collect solar heat and atmospheric heat. The present invention relates to the configuration of the heat collector and thermostatic expansion valve of a hot water supply system that includes a heating device, a hot water supply circuit that sequentially connects a heat exchanger that exchanges heat with the condenser, a hot water storage tank, and a circulation pump.

Construction of a conventional example and its problems A conventional example of a hot water supply apparatus consisting of the refrigerant circulation sealed circuit and a hot water supply circuit will be explained based on FIG. In the figure, 1 is a heat collector that collects solar heat and atmospheric heat and evaporates the refrigerant, 2 is an aqueous mulcher, 3 is a compressor, 4 is a condenser that condenses the refrigerant, 5 is a thermostatic expansion valve, and 6 is a thermosensor tube. 1 to 5 constitute a refrigerant circulation closed circuit. Further, 7 is a heat exchanger that absorbs heat released from the condenser 4, 8 is a hot water storage tank, 9 is a circulation pump, and 7 to 9 constitute a hot water supply circuit. Note that the accumulator 2, compressor 3, condenser 4, thermostatic expansion valve 5, and heat exchanger 7
is incorporated into one unit A, and the temperature sensing tube 6 is provided just before the accumulator.

In the structure of the heat collector which is the refrigerant circulation closed circuit, the refrigerant evaporation capacity of the heat collector 1 changes due to changes in solar radiation and outside air wind speed. In this case, in this configuration, when a change occurs in the refrigerant evaporation capacity, since the temperature-type expansion valve 5 and the temperature-sensing cylinder 6 are provided on the unit A side, the response of the temperature-type expansion valve 5 is slow and the solar radiation Alternatively, when the outside air speed suddenly decreases, low pressure hunting is large and the compressor 3 has a drawback that liquid returns to the compressor 3. Furthermore, the heat collector 1
Because it is installed on the roof of the unit A, the connecting piping with the unit A becomes long and there is a head difference. However, it is difficult for liquid refrigerant and oil to pass through, and vibrations are likely to occur in the piping leading to the heat collector 1.

Purpose of the invention This invention focuses on the above problems and attempts to improve them, and aims to prevent liquid from returning to the compressor and vibration of the pipe leading to the heat collector. be.

Structure of the invention In order to achieve the above object, the present invention provides a refrigerant circulation closed circuit in which a heat collector, an accumulator, a compressor, a condenser, and a thermostatic expansion valve are sequentially connected. It is characterized by having a configuration in which a temperature-sensitive cylinder of the temperature-type expansion valve is provided immediately before the heat collector and is also provided at the outlet of the heat collector, and the temperature-type expansion valve and the temperature-sensor cylinder are incorporated into the unit of the heat collector. It is something. Further, the temperature sensing tube is covered with a hisstic tube, and the temperature sensing tube and a capillary tube connecting the temperature sensing tube and the thermostatic expansion valve are covered with a heat insulating material.

DESCRIPTION OF EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIG. In FIG. 2, the same parts as in FIG. 1 are given the same reference numerals. In the figure, 1 is a heat collector that evaporates the refrigerant using solar heat and atmospheric heat, 2 is an accumulator, 3 is a compressor, 4 is a condenser that condenses the refrigerant, and 5 is a temperature sensor installed just before the heat collector 1. The type expansion valve 6 is a temperature-sensitive cylinder provided at the outlet of the heat collector 1.

Note that the heat collector 1, the thermostatic expansion valve 5, and the temperature-sensitive tube 6 are integrated into the unit B. Further, 7 is a heat exchanger that absorbs heat released from the refrigerant from the condenser 4, 8 is a hot water storage tank, and 9 is a circulation pump.

Next, the details of the unit B will be explained based on FIG. The temperature sensing cylinder 6 is covered with a hisstic tube and disposed at the outlet of the heat collector 1, and is insulated with a heat insulating material 10. Reference numeral 11 denotes a capillary tube that connects the temperature-sensitive cylinder 6 and the temperature-type expansion valve 5, and is similarly insulated with a heat insulating material 10.
The heat collector 1, the accumulator 2, the compressor 3, the condenser 4, and the temperature-type expansion valve 5 constitute a heat collection device that is a closed refrigerant circulation circuit, and the heat exchanger 7, hot water storage tank 8, and circulation pump 9 Together with the hot water supply circuit consisting of the following, a hot water supply system is constructed.

Next, the operation of the water heater having the above configuration will be explained. The high-temperature, high-pressure refrigerant gas compressed by the compressor 3 flows into the condenser 4, and the heat of condensation heats the low-temperature water sent by the circulation pump 9 of the hot water supply circuit, raising the temperature and storing it in the hot water storage tank 8. . On the other hand, the refrigerant that has been liquefied due to the heat of condensation is removed, flows into the thermostatic expansion valve 5, is depressurized, flows into the collector 1, takes away solar heat and atmospheric heat, evaporates into gas, and passes through the accumulator 2 to the compressor 3. Return.

In the above operation, the pipe leading to the heat collector 1 becomes a liquid line up to the temperature-type expansion valve 5, and unlike the conventional embodiment, the gas refrigerant can easily pass through due to the difference in the pipe heads, and the oil and liquid refrigerant can easily pass through. Piping vibrations caused by difficulty in passing can be prevented. Furthermore, by providing the temperature-type expansion valve 5 and the temperature-sensitive tube 6 covered with the hisstic tube at the inlet and outlet of the heat collector 1, respectively, the low-pressure hunting width of the temperature-type expansion valve 5 due to solar radiation or outside air wind speed fluctuations can be reduced. I can do it. Furthermore, by insulating the thermosensitive tube 6 and the capillary tube 11 with a heat insulating material, it is possible to prevent the temperature-type expansion valve 5 from malfunctioning due to the outside air atmosphere, and also prevent damage to the capillary tube 11 due to vibration. can do.

Effects of the Invention As explained above, according to the present invention, a thermostatic expansion valve is provided immediately before the inlet of a heat collector, and a temperature-sensitive tube covered with a hisstic tube is disposed on the outlet side, and the thermostatic tube and the thermostatic expansion valve are disposed on the outlet side. By insulating the capillary tube that connects the heat collector and the temperature sensing tube with a heat insulating material, and integrating the heat collector, thermostatic expansion valve, and temperature sensing tube into an integrated unit, the pipe leading to the heat collector can be Not only can vibration be prevented, but the hunting width of the temperature-type expansion valve due to load fluctuations can be reduced, and as a result, the safety and reliability of the component equipment can be improved. Furthermore, it is possible to prevent malfunction of the thermostatic expansion valve due to changes in the outside air atmosphere and damage to the capillary tube due to vibration, which has great practical effects in terms of equipment reliability.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a conventional hot water supply system comprising a heat collection circuit and a hot water supply circuit; FIG. 2 is a circuit diagram of a water supply system comprising a heat collection circuit and a hot water supply circuit according to an embodiment of the present invention; FIG. 3 is a detailed view of the heat collector unit. 1... Heat collector, 2... Accumulator, 3...
Compressor, 4... Condenser, 5... Temperature expansion valve, 6
...Thermosensitive tube, 11...Capillary tube.

Claims (1)

[Scope of utility model registration request] A heat collection device consisting of a closed refrigerant circulation circuit in which a heat collector, an accumulator, a compressor, a condenser, and a thermostatic expansion valve are successively connected, and a heat exchanger that exchanges heat with the condenser, a hot water storage tank, and a circulation pump are successively connected. The temperature type expansion valve is provided immediately before the inlet of the heat collector, and the capillary tube tip of the temperature type expansion valve is covered with a heat insulating material. 1. A heat collecting device characterized by having a structure in which a temperature sensitive tube with a hisstic tube is provided at the outlet of the heat collector, and the temperature type expansion valve and the temperature sensitive tube are incorporated into a unit of the heat collector.