JPS6345647Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a solar heat collector used as an evaporator of a heat pump water heater that collects solar heat and evaporates a heat medium.

Conventional Structure and Problems Conventionally, this type of heat collecting device has been constructed in such a manner that a finch tube-shaped heat collecting plate 12 and an expansion valve 15 are separated, as shown in FIG. Therefore, the expansion valve 15
The temperature detection unit 16 of the expansion valve 15 is easily influenced by external factors such as sunlight, wind, and rain, and cannot accurately control the evaporation temperature of the heat medium. In addition, the brazed portion of the end return bend 11 of the finch tube 9 is exposed, and there is a problem in that it is susceptible to damage and corrosion due to external forces.
Note that 10 is a tube.

Purpose of the invention The present invention solves such conventional problems.
The purpose of this project is to suppress the influence of external factors such as sunlight, wind, and rain on the expansion valve that controls the operating conditions of the heat collection cycle, and to provide a solar heat collector using a heat pump that is highly stable and can withstand long-term use. do.

Structure of the invention In order to achieve this objective, the present invention integrates a fin-tube type heat collecting plate consisting of a plurality of fins and tubes for circulating heat medium and a box-shaped storage part on the same plane, and the box-shaped storage part It is constructed by storing an expansion year and a return bend.

With this configuration, the expansion valve and return bend portion are not directly affected by sunlight, wind, or rain, and the evaporation temperature of the heat medium can be accurately controlled.
It is particularly effective in protecting brazed parts such as return bends from external forces and preventing corrosion.

DESCRIPTION OF EMBODIMENTS As shown in FIG. 1, a system according to an embodiment of the present invention includes a compressor 1, a heat exchanger 2, heat medium pipes 3 and 3', an expansion valve 4, and a heat collector 5. The hot water supply circuit consists of a heat medium circulation circuit consisting of a heat storage tank 6, a circulation pump 7, and a heat exchanger 2'.
8 is a hot water supply port. The heat collector 5 passes through a plurality of fins 9 to form tubes 10 as shown in FIGS. 3 and 4 so as to collect both atmospheric heat and solar radiant heat.
It is constructed by providing them in a meandering shape. There is also a return bend 11 for connecting the ends of the tube 10 in series, an expansion valve 4 connected between the forward connection port 13 and one tube end of the heat collecting plate 12, and a return bend 11 for connecting the ends of the tube 10 in series. The pipe 17 connected between the connection port 14 of the
Lower lid 18, 18', fin 9 and frame 19, 2
0 and 21, and is housed in a box-shaped housing section 22 that is flush with the heat collecting plate 12.

In the above configuration, the function of the expansion valve 4 is to detect the return heat medium temperature by the temperature detection unit 16 connected to the expansion valve 4, and to efficiently set the outward heat medium amount. The box-shaped storage section 22 alleviates the direct effects of sunlight, wind speed, and rain, and prevents unnecessary operations due to detection errors.

In addition, by allowing the return bend 11 to look into the box-shaped storage section 22, all of the brazed parts of the main body are stored in the box-shaped storage section 22, so that it is possible to prevent damage caused by external environmental factors.
In particular, corrosion of the brazed parts can be prevented.

Effects of the invention According to the invention, the following practical effects are achieved.

(1) The expansion valve is installed inside the box-shaped housing, and the temperature of the heat medium can be detected without being affected by external factors such as rain, wind, or sunlight, allowing accurate control of the heat pump cycle. This enables highly efficient and stable control.

(2) By storing the return bend together with the expansion valve in the box-shaped housing, there is no place for brazing to be directly exposed to the outside, which has the effect of increasing corrosion resistance.

[Brief explanation of drawings]

FIG. 1 is a system configuration diagram of an embodiment of the present invention.
Fig. 2 is a top view showing a conventional example of a heat collector, Fig. 3 is a top view of a heat collector according to an embodiment of the present invention, and Fig. 4 is an exploded perspective view of a heat collector according to an embodiment of the present invention. FIG. 5 is an exploded top view of the main parts of the heat collector. 4... Expansion valve, 9... Fin, 10... Tube, 11... Return bend, 12... Heat collecting plate,
22...Box-shaped storage section.

Claims (1)

[Scope of utility model registration request] A finch tube-type heat collecting plate consisting of multiple fins and tubes that circulate heat medium, and a box-shaped storage part are integrally configured on the same plane, and the box-shaped storage part houses an expansion valve and a return bend. Solar heat collector.