JPS6330946Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a control device for a cold storage with a hot water tank that uses the exhaust heat of the refrigerator to generate hot water.

[Conventional technology]

FIG. 3 is an explanatory diagram of the structure of a conventional refrigerator with a water heater disclosed in, for example, Japanese Patent Application Laid-Open No. 57-136081.
In the figure, reference numeral 5 denotes a compressor, which is sequentially connected with a hot water storage tank heat exchanger 6, a condenser 7, a capillary tube 8, and a cooler 9 by refrigerant piping to form a refrigeration cycle.

Reference numeral 1 denotes a hot water storage tank which accommodates the hot water storage tank heat exchanger 6 and has an inlet pipe 2 directly connected to a water supply at its lower part and an outlet pipe 3 having a valve 4 at its upper part.

Next, the operation will be described. The high temperature and high pressure refrigerant discharged from the compressor 5 exchanges heat with cold water in the heat exchanger 6 in the hot water storage tank 1. Then, the normal operation of cooling the inside of the refrigerator body 11 by dissipating heat in the condenser 7 is repeated.

Therefore, the heated hot water in the hot water tank 1 is released by opening the valve 4, and cold water is supplied into the hot water tank 1 from the inlet pipe 2 directly connected to the water supply.

[Problem that the invention attempts to solve]

Conventional refrigerators with water heaters are configured as described above, so in summer, the water temperature in the hot water storage tank remains high because hot water is not needed, and the outside temperature is high and the water temperature is also high, so the hot water storage tank Since there is almost no heat exchange within the tank, heat is mainly dissipated through the condenser. However, if a large condenser is installed to dissipate sufficient heat in the summer, the water temperature will be low in the winter and the amount of hot water supplied will increase, so heat exchange with the hot water tank heat exchanger will increase, but the load on the refrigerator will be small and the amount of heat dissipated will be reduced. Since it can be small, there is a risk that the heat radiating capacity of the condenser will be too large and the heat exchanger on the heat radiating side will be too large, reducing the cooling performance of the refrigerator.

This invention was made to solve the above-mentioned problems, and the purpose is to obtain a refrigerator with a hot water tank that has the cooling performance of a refrigerator throughout the year.

[Means for solving problems]

The refrigerator with a hot water tank according to this invention has a total heat dissipation capacity of the hot water tank heat exchanger and the condenser that is almost the same as the condenser of a conventional refrigerator without a hot water tank, and a fan motor for cooling the condenser. The fan motor is energized when the outlet temperature of the condenser reaches a predetermined temperature or higher.

[Effect]

The refrigerator with a hot water storage tank in this invention is equipped with a fan motor for cooling the condenser that is energized by the outlet temperature of the condenser. This eliminates the risk of refrigerant accumulating and resulting in insufficient cooling of the refrigerator.

[Example of idea]

This invention will be explained in detail below based on one embodiment.

1 is a hot water storage tank, an inlet pipe 2 is directly connected to a water supply, and an outlet pipe 3 is provided with a valve 4 and the like. Reference numeral 5 denotes a refrigerator compressor, which is connected to a hot water tank heat exchanger 6 provided in the hot water storage tank 1 through refrigerant piping, and further connected to a condenser 7, a capillary tube 8, a cooler 9, etc. in order to form a refrigeration cycle. ing. 10 senses the temperature inside the refrigerator body 11 containing the cooler 9, and the compressor 5
This is the first temperature regulator that controls the temperature.

12 is a fan motor for cooling the condenser;
A second switch that turns on and off by sensing the temperature of the outlet 14 of the
Connected in series with the temperature controller and connected to the power supply.

In a refrigerator with a hot water storage tank configured in this way,
Normally, the temperature inside the refrigerator body 11 is sensed by the first temperature regulator 10, and the compressor 5 is turned on and off to maintain the temperature inside the refrigerator body 11 at an appropriate temperature.

At this time, the high-pressure, high-temperature refrigerant discharged from the compressor 5 exchanges heat with the water in the hot water tank 1 through the hot water tank heat exchanger 6, thereby warming the water in the hot water tank. By opening the valve 4, the heated water in the hot water storage tank is pushed out via the outlet pipe 3 by the water pressure from the inlet pipe 2.
Warm water can be used.

However, since the use of hot water differs in daily life and from household to household, the water temperature in the hot water tank while the compressor is operating varies widely. When hot water is hardly used, the amount of heat exchanged by the hot water tank heat exchanger 6 is high, and therefore the amount of heat exchanged by the hot water tank heat exchanger 6 becomes very small. Conversely, when hot water is used intensively, the water temperature is low and the amount of heat exchanged in the hot water tank heat exchanger increases.

Therefore, when the water temperature is high, the amount of heat exchanged by the hot water storage tank heat exchanger alone is insufficient, and the refrigerant enters the condenser 7 while still at a high temperature, and if there is still insufficient temperature here, the temperature at the outlet 14 of the condenser 7 increases. Rise.

When this temperature becomes higher than the set temperature, the second temperature regulator 13 closes and the condenser cooling fan motor 12
rotates and cools to a predetermined temperature.

On the other hand, when the water temperature in the hot water storage tank is low enough, heat is exchanged sufficiently in the hot water tank heat exchanger 6, and the condenser outlet 1
The temperature at No. 4 is also low enough that the condenser fan motor does not rotate.

[Effect of idea]

In this way, according to this invention, fluctuations in the amount of heat dissipated from the refrigerator due to the water temperature in the hot water storage tank can be compensated for by the condenser cooling fan motor, which is controlled by the condenser outlet temperature. When the water temperature is high, there is insufficient heat dissipation, and when the water temperature is low, as in winter, hot water is used intensely, there is too much heat dissipation, and liquid refrigerant accumulates on the condenser side, resulting in insufficient cooling of the refrigerator. It is possible to provide a refrigerator that can be used safely without any harmful phenomenon, and that can effectively utilize waste heat and is excellent in energy saving.

[Brief explanation of drawings]

FIG. 1 is a system diagram of a refrigerator with a hot water storage tank in which this invention has been implemented, FIG. 2 is a wiring diagram thereof, and FIG. 3 is a structural diagram of a conventional refrigerator with a water heater. 1 is a hot water tank, 5 is a compressor, 6 is a hot water tank heat exchanger, 7 is a condenser, 8 is a capillary tube, 9 is a cooler, 12
is the condenser fan motor. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] It has a refrigerator with a built-in cooler, a hot water tank with an inlet pipe, an outlet pipe, and a hot water tank heat exchanger, and a compressor, a hot water tank heat exchanger, a condenser, a capillary tube, and a cooler are connected in sequence to perform refrigeration. A refrigerator with a hot water tank comprising a condenser cooling fan motor that forms a cycle and is energized when the outlet temperature of the condenser reaches a predetermined temperature or higher.