JPS58179767A - Water heater - Google Patents

Abstract

PURPOSE:To enable the water heater to be operated continuously while a compressor is applied with an optimum load by a method wherein in the title heater in which hot water obtained by utilizing heat of a coolant of a refrigerator is re-heated by an auxiliary heat source machine such as a boiler, the heat capacities of main and auxiliary heat exchangers are so determined as to satsify a predetermined relationship. CONSTITUTION:A circulation circuit is formed such that water from the lower part of a hot water storage tank 8 which is supplied with the water from a feed water pipe 9 is returned to the upper part of the tank 8 through a circulation pump 10, the main heat exchanger 11, the auxiliary heat exchanger 12 and a thermo-valve 13. The main heat exchanger 11 houses therein the compressor 2 and the condenser 3 of the refrigerator 1 provided with an evaporator 5 and has a heat capacity H1. Further, the auxiliary heat exchanger 12 houses therein a heater 6 connected to the auxiliary heat source machine 7 such as a boiler and has a heat capacity H2. In addition, every part of the device is so formed that when the amount of condensing heat of the condenser 3 is Q1, the heating amount Q2 of the heater 6 is made smaller than Q1 and the relationship of H1/ H2>=Q1/Q2 is satisfied.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water heater that reheats hot water obtained by the freezing condensation heat of a refrigerator using an auxiliary heat source such as a boiler.

Conventionally, city water can be reduced by 50% using the refrigerant condensation heat of refrigerators with high operating efficiency.
In a device that heats the water to about 60°C and then further heats it with a heater such as a boiler to raise the temperature to around 60°C and extracts it as hot water, the temperature level of this heater is higher than the heat of condensation of the refrigerant. Since p is also high, the general trend has been to make the heat capacity of the auxiliary water heat exchanger with a built-in heater much larger than that of the main water heat exchanger with a built-in refrigerant condenser.

However, the heating amount of the heater is smaller than the refrigerant condensation heat amount, and the thermostat that opens at 60°C is installed on the hot water outlet side of the auxiliary water heat exchanger to take out hot water at a constant temperature of 60°C. If you install a valve, the temperature of the hot water in the auxiliary water heat exchanger will rise slowly at the start of operation, so it will take time for the thermo valve to open, and during this time the condensation temperature of the refrigerant condenser will rise abnormally. , there was a risk that the compressor would not be able to continue operating, which would be the worst case scenario.

In view of the above, the present invention sets the temperature of the hot water in the auxiliary water heat exchanger to rise at the same time as or in advance of the cold condensation temperature at the start of hot water supply operation, and quickly opens the thermo valve. In order to achieve this objective, the present invention has a built-in refrigerant condenser and a main water heat exchanger with a good heat capacity H1.

Located on the hot water outlet side of the heat exchanger, the heating amount q is higher than the condensing heat amount Q1 of the condenser. Heat capacity H with built-in small heater! auxiliary water heat exchanger, and a thermovalve located on the hot water outlet side of the heat exchanger, and the H1, H! and the ratio of QIIQI are set as II 1/mu≧Q </Q t 〇For the following, embodiments of the present invention will be explained based on the drawings, and (1) is a compressor (! ), condenser (3)
, a refrigerator which has a refrigerant pressure reducing element (4) such as a capillary tube connected in a ring with an evaporator (@) that exchanges heat with the outside air, (6) radiates heat from high-temperature heat source water from an auxiliary heat source device (ma) such as a boiler. The amount of heat q in the heater, even though the temperature level is higher than that in the condenser (3)! is 4 smaller than the heat of condensation Q1.

The city water supplied from the water supply pipe (-) to the lower part of the hot water storage tank (8) is passed through the circulation pump (field) to the condenser (built-in main water heat exchanger (11)) and the heater ( -) The built-in auxiliary water heat exchanger (1) and the thermo valve (I!I) that opens when the hot water temperature is 60°C are used to return to the hot water storage tank. α4 is the hot water faucet.

Moreover, the heat capacity H1 of the main water heat exchanger (Ill) and the heat capacity H1 of the auxiliary water heat exchanger (121) are the condensing heat amount Q of the condenser iml.
1. The ratio of the heating 11Ql of the heater (6) is H
1//11! It is set as ≧q1Δi.

Therefore, in addition to driving the compressor (!), the auxiliary heat source machine (7
) to start hot water supply operation, the main water heat exchanger (
The city water in 11) and the city water in auxiliary water heat exchanger Q'4 are individually heated by the heat of refrigerant condensation from the condenser fi+ and the heat radiated from the heater (6), and are gradually raised in temperature. Therefore, K1/H1
= '; If the setting is L +/Q2, the main water heat exchanger (
11) The temperature of the city water in the auxiliary water heat exchanger α reaches 50℃, and the temperature of the city water in the auxiliary water heat exchanger α reaches 60℃. 60°C hot water is supplied into the hot water storage tank (8).

In addition, if the setting is MlΔ口)Q When the temperature reaches 60°C, the thermovalve I opens and the circulation pump (Kuji) starts driving.

As described above, the apparatus of the present invention can heat water heated by the refrigerant condenser with a condensing heat amount Q1 to a heating amount Q! In a water heater that takes out high-temperature water by reheating it with a small heater, the heat capacity H1 of the raw water heat exchanger and the heat damage 11H of the auxiliary water heat exchanger are
Let the ratio of z be El/)I! ≧ Q +, A; 4 t is set so that the hot water temperature in the auxiliary water heat exchanger rises at the same time or in advance of the refrigerant condensation temperature at the start of hot water supply operation, and the thermo valve is opened promptly. This eliminates the conventional drawback of hot water accumulating due to thermovalve blockage, causing the hot water temperature in the auxiliary water heat exchanger to flow back into the main water heat exchanger, causing the load temperature of the refrigerant condenser to rise abnormally, making it possible to optimize the compressor. Capable of continuous operation under load.

44. Brief explanation of drawings The drawing is a piping system diagram showing an embodiment of the device of the present invention.

+! +... Refrigerator, (3)... Condenser, (6)...
・Heater, (I 1)... Main water heat exchanger, (12J・
...Auxiliary water heat exchanger, 01...Thermo valve.

Claims (1)

[Claims] m. A main water heat exchanger with a built-in refrigerant condenser of the refrigerator and a good heat capacity, and a built-in heater located on the hot water outlet side of the heat exchanger and having a smaller heating amount q2 than the condensing heat amount Q1 of the condenser. Heat Capacity ■It has a hot auxiliary water heat exchanger and a 4A bulb located on the hot water outlet side of the heat exchanger.
The ratio of l and the ratio of J and Ql is H+/Ht≧Q +/Q
A water heater characterized by setting 2.