JPS599451A - Solar heat hot-water heater - Google Patents

Abstract

PURPOSE:To obtain a constant hot-water temperature without being controlled by the amount of sunshine by a method wherein a hot-water temperature sensor is provided in a hot-water reserving tank and is connected to a remote control device to control the starting and stopping of supplying water by an electric valve so that the hot-water temperature in the hot-water reserving tank is kept at the set value of the remote control device. CONSTITUTION:Small amount of water, reserved in the hot-water reserving tank 1 beforehand, is heated by the solar heat collected by a heat collector 2 and the temperature thereof is risen. When the hot-water temperature in the hot-water reserving tank 1 has arrived at a temperature set in the remote control device 4, the electric valve 5 is opened by a signal from the remote control device 4 and water is fed into the hot-water reserving tank 1. When the hot-water temperature is lowered in some degree by feeding the water, the electric valve 5 is closed and feeding of the water into the hot- water reserving tank 1 is stopped. When the amount of sunshine is increased further, the temperature of the hot-water in the hot-water reserving tank 5 is risen and the amount of hot-water is increased in accordance with the amount of sunshine as the actions of temperature rise feeding water temperature rise feeding water are repeated, therefore, the hot-water temperature may be kept at constant value.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a solar water heater that utilizes solar heat to obtain hot water for hot water supply.

2-:Conventional structure and its problems A conventional solar water heater of this type was constructed as shown in FIG. That is, in this Fig. 5, 11 is a water supply pipe, 12 is a pole tap that detects the water level and stops the water supply when the water level reaches a predetermined water level, 13 is a hot water storage tank, 14 is a heat collector, and 15 is a hot water heater. It's plumbing. In this solar water heater, a preset amount of water is supplied into a hot water storage tank 13 using a ball tap 12, and heated by solar heat collected by a heat collector 14 to obtain hot water. There was a drawback that the temperature changed. That is, as shown in FIG. 6, since the amount of hot water in the hot water storage tank is constant, the hot water temperature and the amount of solar radiation change in a proportional relationship. For this reason, on days when the amount of solar radiation is low, the temperature of the hot water in the hot water storage tank does not rise, resulting in a problem in that the satisfaction of use and the effectiveness of use are low.

OBJECTS OF THE INVENTION In view of the two conventional problems, an object of the present invention is to provide a solar water heater that can always provide a constant hot water temperature without being affected by the amount of solar radiation.

Structure of the Invention In order to achieve the above object, the present invention provides a hot water temperature sensor for detecting the hot water temperature in a hot water storage tank in which a small amount of water is stored in advance, and a hot water temperature sensor, a hot water temperature display, and a hot water temperature setting. A motor-operated valve is connected to a remote control device that can be connected to the water supply circuit, and is opened and closed by a signal from the remote control device. With the above configuration, the amount of hot water in the hot water storage tank increases according to the amount of solar radiation, so a constant hot water temperature can always be ensured.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Fig. 1 shows an embodiment of the present invention, including a water sensor, 4 a remote control device capable of displaying and setting the hot water temperature, 6 an electric valve, and 6 detecting the water level in the hot water storage tank 1 to supply water. A water supply valve consisting of a ball tap that stops, 7 is a water supply pipe, and 8 is a hot water supply pipe. The hot water temperature sensor 3 and the remote control device 4 are electrically connected, and the electric valve 5 provided in the water supply pipe 7 is opened and closed by signals from the remote control device 4.

The operation in the above configuration will be explained. A small amount of water previously stored in a hot water storage tank 1 is heated by solar heat (solar radiation) collected by a heat collector 2 and its temperature rises.

The temperature of the hot water in the hot water storage tank 1 is detected by the hot water temperature sensor 3 and displayed on the remote control device 4. Further, when the temperature of hot water in the hot water storage tank 1 reaches the temperature set by the remote control device 4, the electric valve 6 is opened in response to a signal from the remote control device 4, and water is supplied into the hot water storage tank 1. When the temperature of the hot water in the hot water storage tank 1 drops to a certain degree from the set value of the remote control device 4 due to this water supply, the electric valve 6 closes and the water supply to the hot water storage tank 1 is stopped. If there is further sunlight, the hot water storage tank 16
1.1. The temperature of the hot water inside is raised, and the above operation is repeated, and while repeating the operation of temperature increase → water supply → temperature increase → water supply as shown in Figure 3, the amount of solar radiation changes as shown in Figure 3. The amount of hot water increases accordingly, and the hot water temperature is kept constant. Note that if the amount of solar radiation is very high and the hot water temperature set on the remote control device 4 is low, the hot water volume will increase in proportion to the amount of hot water that exceeds the capacity of the hot water storage tank 1. In this case, hot water storage tank 1
This will cause more overflow. In this case, since a water supply valve 6 consisting of a pole tap is installed, even if the electric valve 6 is open when the water is full, this water supply valve 6 can stop the water supply to the hot water storage tank 1. As a result, overflow will not occur. Furthermore, as shown in FIG. 4, by installing the hot water temperature sensor 3 in the hot water storage tank 1 at a position lower than the outlet 9 of the hot water supply piping 8, the initial water temperature in the hot water storage tank 1 can be detected. It becomes possible.

Effects of the Invention As described above, according to the present invention, an electric valve that opens and closes in response to a signal from a remote control device is provided in the water supply circuit, and the water supply by the electric valve is adjusted so that the temperature of hot water in the hot water storage tank is the set value of the remote control device. Since the system is controlled to start and stop, the amount of hot water in the hot water storage tank increases according to the amount of solar radiation, and as a result, a constant hot water temperature can be maintained, making it easy for users to use. It is capable of providing solar water heaters.

[Brief explanation of drawings]

FIG. 1 is a piping configuration diagram of a solar water heater showing an embodiment of the present invention, FIG. 2 is a graph showing water supply and temperature raising operations according to the present invention, and FIG. 3 is a hot water temperature according to the present invention. A graph showing the relationship between the amount of hot water and the amount of solar radiation. Fig. 4 is a configuration diagram showing the installation position of the hot water temperature sensor in the solar water heater of the present invention. Fig. 5 is a piping configuration diagram of a conventional solar water heater. Hot water temperature and amount according to conventional examples. It is a graph showing the relationship between the amount of solar radiation. 1... Hot water storage tank, 3... Hot water temperature sensor, 4... Remote control device, 6... Electric valve, 6... Water supply valve , 7... Water supply piping. Figure 2 Figure 3 Figure 5 Figure 6

Claims (2)

[Claims] (1) A hot water temperature sensor that detects the hot water temperature is installed in a hot water storage tank that stores a small amount of water in advance, and this hot water temperature sensor is connected to a remote control device that can display and set the hot water temperature.
A solar water heater is provided in the water supply circuit with an electric valve that opens and closes in response to a signal from a remote control device, and the water supply is controlled to start and stop using the electric valve so that the temperature of hot water in the hot water storage tank reaches a set value of the remote control device. . (2) The solar water heater according to claim 1, wherein the water supply circuit includes a water supply valve that detects the water level of the hot water storage tank and stops water supply separately from the electric valve.