JPS58175750A - Hot water supply device - Google Patents

Abstract

PURPOSE:To enable to operate at a fixed load by keeping a coolant temperature at an outlet of a coolant condenser and a hot water temperature at an outlet at fixed values, by a method wherein a bypass pipe for recirculation is provided by branching an outlet side of hot water of a heater and flow control valves are provided on each of a main pipe after branching and a bypass pipe. CONSTITUTION:A condenser 3 of a refrigerator 1 consisting of a compressor 2, the condenser 3, decompression element 4 and a vaporizer 5 is installed within a heater 6 connected by a main pipe 9 provided with a pump 8 with a hot water tank 7 annularly. A bypass pipe 10 connecting with a suction side of the pump 8 by branching the main pipe 9 of an outlet side of the heater 6 is provided, a main flow control valve 11 and an auxiliary flow control valve 13 are provided on the main pipe 9 after branching and a bypass pipe 10 respectively, and an opening is adjusted by temperature sensing elements 12 and 14 according to a hot water temperature at an outlet. The above auxiliary flow control valve 13 is fully opened by making the vicinity of a set temperature into a peak and the main flow control valve 11 starts to open gradually when it reaches a set temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water supply device that supplies hot water obtained from refrigerant and linear heat of a refrigerator to a hot water storage tank at a constant temperature.

This type of water heater is considered useful because it has a high operating performance coefficient, but as time passes from low-load operation in which the refrigerant condenser exchanges heat with low-temperature city water at the start of operation, As the temperature of the water rises, the temperature at the refrigerant outlet of the refrigerant condenser and the temperature at the water outlet fluctuate as the water shifts to heavy load operation, which has the disadvantage of reducing refrigeration efficiency and hot water supply efficiency. .

For this purpose, a thermo valve that opens at the set temperature of the hot water outlet 11c of the refrigerant condenser is conventionally installed, and the temperature is constant at 11! Attempts have been made to supply hot water that has been raised to a certain degree of temperature to the hot water storage tank, but until this thermo valve opens, the hot water remains in the refrigerant temperature and heat conversion state, so #! This method had the disadvantage that the load increased rapidly and a large stationary load was applied to the refrigerator, so it was not satisfactory.

Considering such a point Vcwi in the present invention, the refrigerant outlet temperature of the refrigerant #condensate and the hot water outlet temperature are kept constant at 9 o'clock at the start of operation, and the constant temperature hot water supply operation is performed under The aim is to provide a hot water heater that will In order to achieve this purpose, an uninvented α storage tank and a heater containing refrigerant 5uis for the refrigerator are connected in a ring with a T upper pipe, and the hot water lobe 11 of the heater is branched for heating. A short-circuit pipe for recirculating hot water is provided in the heater, and when the hot water temperature of the heater reaches the set value, a royal flow control valve that gradually opens #lc is connected to the clay pipe after the 1-m branch and near the set value. A sub-flow control valve that opens fully at peak is interposed in each of the short-circuit pipes.

Below, embodiments of the present invention will be described based on the drawings.
In the diagram, compressor + 2L #Jii device (3),
Refrigerant pressure reducing element (4) such as a capillary tube, evaporation that converts heat with outside air! )+51'i Annularly connected refrigerator, condenser (3)
A heater (6) with a built-in storage tank (7) and a circulation pump (8) are all valved and connected in an annular manner by a clay pipe (9).

αa is a short-circuit pipe that branches off from the hot water outlet shaft of the heater (6) and recirculates this heated a Outlet temperature sensor temperature control valve (Detected at 12 and gradually opened when the set value t2'C1c is reached as shown in Figure (C)), short-circuited pipe in Q3, RT heater (6)
Figure 2 (
The control valve shown in b) is a 1iat control valve that opens fully with a peak near the set value t2'C.

Therefore, when the refrigerant discharged from the compressor (2) condenses and liquefies in the condenser (3) when the refrigerator +11 starts operating, the low-temperature city water in the heating 11161 is heated by the heat of condensation, and the outlet side temperature increases as shown in Figure M2. ) gradually rises. By the time this increased temperature reaches the set value tl'c, the royal flow control valve ■ and the auxiliary flow control valve a3 have been closed several times, and the heat from the low-temperature city water stagnant in the heater (6) is Due to the exchange action, the temperature rises rapidly and the system quickly shifts to full load operation. still,
The auxiliary flow control valve rI3 is designed not to close completely to #C so as not to overload the circulation pump (81).

When the temperature on the outlet side of heating a (6) reaches t1'C, only the li1 flow rate control needle 3 begins to gradually open as shown in Fig. 2(b), and the hot water at t1'C is connected to the short-circuit pipe. By gradually increasing the flow rate through the circulation pump (8) and recirculating it to the heater (6), the temperature rise rate becomes slow as shown in Figure 2 (a). It continues to operate under load conditions.

Next, when the temperature reaches 12°C, the sub-flow control valve l is fully opened and the king flow rate control hook valve (111) begins to gradually open to gradually start supplying hot water to the hot water storage tank (7), causing a slow rise in Wl. When the temperature reaches t5°C, the auxiliary flow control valve q3 begins to gradually close, and the refrigerator 11) continues to operate under a constant load condition, after which the flow rate control valve unrz is fully opened.
With the auxiliary flow control valve (13ri fully open), the system smoothly transitions to steady operation in which all the hot water at t5'C is supplied to the hot water storage tank (7), and constant temperature water can be obtained from the faucet u9.

In addition, if there is a short circuit f (1111) to the circulation pump (8) and the earthen pipe 19)
However, as in the above-mentioned embodiment, the short-circuit pipe (let) may be provided across the heater (6) and circulation pump +81, and n can be shared by one circulation pump +s + j-1. .

As described above, in the water heater of the present invention, at the start of operation, the clay pipe branched on the hot water outlet side of the heater and the short-circuit pipe for recirculation are proportionally controlled to fully open. By interposing a sub-flow control valve that proportionally controls the flow rate from close to fully open to fully closed, the refrigerant outlet temperature and hot water outlet temperature of the refrigerant condenser are kept constant from the initial stage to steady state. It is possible,? 1tal [The machine can be operated under constant load to supply hot water at a constant temperature.

[Brief explanation of drawings]

Fig. 1 is a piping system diagram of the water heater of the present invention, and Fig. 2 shows I, (b), and (c), respectively. FIG. 1 is a custom-made diagram showing the hot water outlet side temperature of the heater, the proportional opening/closing operation of the sub-flow control valve, and the proportional opening/closing operation of the main flow rate restriction valve in FIG. (1)... Refrigerator, 13)... Condenser, (6)...
・Heater, +71...Hot water storage tank, 19)...Clay pipe, q■...Short-circuit pipe, full...Royal flow control - valve, +
11... Sub-flow control valve.

Claims (1)

[Claims] [11 The hot water storage tank and the heater containing the refrigerant condenser of the refrigerator are connected in a ring with a clay pipe, and a short-circuit pipe is provided that branches from the hot water outlet side of the heater and recirculates the hot water to the heater. , a royal flow control valve that gradually opens when the hot water temperature of the heater reaches a set value is provided on the branched earthen pipe, and a sub-flow control valve that opens fully at peak t near the set value is provided on the short-circuit pipe. A hot water supply device with t% characteristics.