JPH0264344A - Hot water storage type hot water feeding device - Google Patents

Abstract

PURPOSE:To maintain the temperature of a hot water only in a necessary quantity at a given value to reduce incurring of a heat loss and to enable execution of high-efficient operation by providing a control device which restarts operation of a heating source and a feed valve until an amount of accumulated heat exceeds a given value when, during input of a load completion signal, the amount of accumulated heat is below the given value. CONSTITUTION:When a load completion signal is inputted to a load completion signal input device 13, it is determined by a control device 10 whether a calorific value capable of responding to a load amount during the morning remains. Namely, the present level HW detected by a level sensor 8 is compared with a set level H1, and when the present level HW is below the set level H1, a solenoid valve 5 for feed is opened to feed water in a hot water storage tank 1 until a level in the hot water storage tank 1 is raised to a position higher than the set level H1. A hot water temperature TH detected by a hot water temperature sensor 3 is compared with a set temperature TO by the control device 10, and when the present hot water temperature TH is below the set temperature TO, a heating source 2 is driven to effect heating until the temperature of hot water in the hot water storage tank 1 is increased to a value higher than the set temperature TO. Finally, when the temperature of hot water in the hot water storage tank 1 exceeds the set temperature TO, operation of the heating source 2 is stopped by the control device 10 to clear a load completion signal.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a hot water storage type water heater, and in particular, when a load end signal of -day is input, the amount of heat stored in hot water in the hot water storage tank is calculated and the amount of heat stored in the hot water is calculated the next morning. The present invention relates to a hot water storage type hot water supply device which further performs a heat collecting operation when the amount of heat stored is insufficient to be used for the heat storage.

(Prior Art) Conventionally, a heat pump circuit, a hot water storage tank that collects and exchanges solar heat and atmospheric heat using a heat pump and stores heated hot water, an outside temperature detector that detects the ambient temperature, and a The system is equipped with a water temperature detector, a timer that counts the current time, and a controller that has a circuit that determines whether to start or stop the compressor based on the outside temperature, the water temperature in the hot water tank, and the current time. The time to start operating the compressor necessary to bring the water to the boiling temperature is determined from the outside temperature, the water temperature in the storage tank, and the current time, and the heat pump is operated in an area with a high coefficient of performance, and when hot water is used in the evening, A hot water storage type hot water supply device has been proposed which aims to improve the heat collection performance of the -layer by obtaining a hot water temperature of 100 mL (see Japanese Patent Application Laid-Open No. 122863/1983).

(Problems to be Solved by the Invention) In this conventional hot water storage type water heater, the hot water in the hot water storage tank is boiled to a predetermined temperature at a predetermined time in the evening, so the heat pump is operated in an area with a high coefficient of performance. However, since the hot water storage tank is always filled with water and heat collection operation is performed, excessive heat is collected, and if you try to maintain the hot water to be used the next morning at the specified temperature, the amount of hot water is large and the heat is too high. There were problems in that losses were large, efficiency remained poor, and the hot water storage tank became large.

Therefore, the present invention is a compact hot water storage system that performs heat collection operation without collecting excessive heat, and reduces heat loss by maintaining only the necessary amount of hot water to be used the next morning at a predetermined temperature. The purpose is to provide a hot water supply device.

(Structure of the Invention) According to the present invention, the hot water storage tank gradually increases and stores hot water while maintaining the hot water temperature within a predetermined temperature range by alternately repeating operation of the heating source and opening of the water supply valve. , a water level sensor for detecting the amount of hot water in the hot water storage tank, a temperature sensor for detecting the temperature of the hot water in the hot water storage tank, and an operation of the heating source when the use of the hot water in the hot water storage tank is finished. and a load end signal input device for inputting a load end signal for stopping the opening of the water supply valve, and when the load end signal is input, the load end signal is inputted based on the detected values of the water level sensor and the temperature sensor. A control device is provided that calculates the heat storage amount of hot water in the hot water storage tank, and when the heat storage amount is below a predetermined value, restarts the operation of the heat source and the water supply valve's 1 m discharge until the heat storage amount reaches the predetermined value or more. A hot water storage type water heater is provided.

(Example) Hereinafter, the present invention will be explained in detail based on the accompanying drawings.

FIG. 1 is a schematic configuration diagram showing an embodiment of a hot water storage type hot water supply apparatus according to the present invention, where ■ is a hot water storage tank and 2 is a heating source.

The hot water tank I is located between the J9 hot water tank and the casing.
It is constructed so that the water in the hot water storage tank can be kept warm by interposing a Ji heating material.

The heat source 2 is composed of, for example, a heat exchanger of a heat pump that uses solar heat or atmospheric heat, and for example, the compressor is
By turning N and OFF, heat collection operation is turned on and off.
be done.

In the upper part of the hot water storage tank 1, there is a hot water storage I? A water supply port 4 is provided for supplying water into the ffl, and this water supply port 4 includes a water supply valve 5 for turning on and off the water supply, and a hot water storage tank 1.
A ball tap 6 is provided that completely stops water supply from the water supply port 4 when the water inside the water reaches a predetermined water level or higher. Further, a branching pipe 7 for separating hot water from hot water in the hot water storage tank 1 is connected to the water supply port 4 .

A water level sensor 8 is provided in the lower part of the hot water storage tank 1 to maintain the water level inside the hot water storage tank 1 at a predetermined water level of 1 m and at the same time to detect the hot water L1 stored in the hot water storage tank 1.

A hot water supply port 9 is provided in the lower part of the hot water storage tank 1 to draw hot water from the hot water storage tank 1. This hot water supply port 9 is
It is composed of a hot water sampling port 9a having an opening for drawing hot water in the hot water storage tank 1, and a hot water sampling pipe 9b for drawing the hot water from the hot water sampling port 9a to the outside of the hot water storage tank 1.

A temperature sensor 3 for detecting the temperature of the hot water in the hot water storage tank 1 is provided near the hot water sampling pipe 9b.

1. 13 is a load end signal input device for inputting a load end signal when the use of one batch of hot water in the hot water storage tank 1 is finished. It consists of the equipment used.

In FIG. 1, when the load end signal is input, IO calculates the amount of heat storage of hot water in the hot water storage tank 1 based on the detected values of the water level sensor 8 and temperature sensor 3, and this heat storage −H5 is determined as a predetermined value. When the value is less than the predetermined value, the control device drives the heating source 2 until the value is equal to or greater than the predetermined value.

FIG. 2 is a flowchart for explaining the operation of the nozzle water heater constructed as described above.

First, the water level in the hot water tank 1 detected by the water level sensor 8 is 1. (
W and the preset minimum water level■. Compare with. If the water level in the hot water storage tank 1 is below the minimum water level 1-1, the water supply electromagnetic valve 5 is opened to supply water until the water level in the hot water storage tank 1 reaches the minimum water level Ha or higher.

Next, the hot water temperature T in the hot water storage ff1l detected by the temperature sensor 3
, and the first set temperature T. If the hot water temperature T in the hot water storage tank 1 is higher than the first set temperature T1, the water supply solenoid valve 5 is opened and water is supplied until the hot water temperature T in the hot water storage tank 1 becomes lower than the second set temperature T2. Continue.

Water temperature T in hot water storage tank 1. If the temperature is lower than the first set temperature T1, the heating source 2 is turned on to heat the hot water tank 1 until the temperature T of the hot water reaches the third set temperature T3 or higher.

Hereinafter, similarly, the second set temperature T2 and the third set temperature T,
The hot water in the hot water storage tank 1 is gradually increased while maintaining the water supply operation and heating operation within the range of . However, the hot water in the hot water tank 1 is gradually increased by repeating the hot water supply operation and the heating operation in the same way as the above operation.When the hot water in the hot water storage tank 1 reaches a predetermined water level or higher, the pole The tap 6 completely stops the water supply operation.

In this way, since the amount of stored hot water is gradually increased through the water supply operation and heating operation within the range of the lowest water level and the highest water level within 1'ffl of hot water storage, hot water at the set temperature is always supplied and, for example, slightly There is no need to fill the hot water tank 1 with water in the morning when the hot water is used or during the day when the hot water is not used much.For example, it is only necessary to operate the hot water storage tank 1 so that it is full of water by the evening when a large amount of hot water is used. Therefore, the hot water storage tank 1 only needs to have a capacity for hot water that will be used in the evening, for example, and the hot water storage tank itself can be made smaller.

FIG. 3 is a flowchart for explaining another operation of the hot water storage type water heater according to the present invention.

First, when a load end signal is input to the load end signal input device 13, the control device IO determines whether there is enough heat remaining to cope with the morning load. That is,
Current water level Hw detected by water level sensor 8 and set water level H2
If the current water level Hw is below the set water level H7, the water supply electromagnetic valve 5 is opened to supply water into the hot water storage Ps1 until the water level in the hot water tank 1 reaches the set water level H6 or higher.

Next, the hot water temperature T detected by the hot water temperature sensor 3. and the set temperature T.

The current hot water temperature T is compared with the set temperature T by the control device 10. If it is below, the heating source 2 is driven to bring the water temperature in the hot water storage tank 1 to the set temperature T. Heat until it reaches above temperature.

Finally, the hot water temperature setting temperature T in the hot water storage tank 1. When this happens, the control device IO stops the operation of the heating source 2 and clears the load end signal.

Note that the control device 10 is composed of, for example, a microcomputer.

(Effects of the Invention) As described above, the hot water storage type water heater according to the present invention includes a hot water tank that gradually increases and stores the amount of hot water by alternately repeating operation of the heating source and opening of the water supply valve, and a hot water storage tank. A water level sensor detects the amount of hot water in the tank, a temperature sensor detects the temperature of hot water in the hot water tank, and the heating source stops operating and the water supply valve opens when the hot water in the tank is used up. and a load end signal input device for inputting a load end signal to calculate the amount of heat stored in the hot water in the hot water storage tank based on the detected values of the water level sensor and the temperature sensor when the load end signal is input. However, when the amount of heat storage is below a predetermined value, we have installed a control device that restarts the operation of the heating source and the opening of the water supply valve until the amount exceeds the predetermined value. To provide a small-sized hot water storage type water heater which can be operated efficiently by reducing heat loss by maintaining only the required amount of hot water to be used the next morning at a predetermined temperature.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an embodiment of a hot water storage type water heater according to the present invention, FIG. 2 is a flowchart for explaining the same operation, and FIG. 3 is a flowchart for explaining another operation. It is a diagram. ■, hot water tank 2, heating source 3, temperature sensor 8, water level sensor 10, control device

Claims (1)

[Claims] A hot water storage tank that gradually increases and stores the amount of hot water while maintaining the water temperature within a predetermined temperature range by alternately repeating operation of the heating source and opening of the water supply valve, and a water level for detecting the amount of hot water in the hot water storage tank. a sensor, a temperature sensor for detecting the temperature of hot water in the hot water storage tank, and a load end signal for stopping the operation of the heating source and opening of the water supply valve when the use of the hot water in the hot water storage tank is finished. and a load end signal input device for inputting the load end signal, and when the load end signal is input, calculates the amount of heat stored in the hot water in the hot water storage tank based on the detected values of the water level sensor and the temperature sensor, The hot water storage type hot water supply apparatus is provided with a control device that restarts operation of the heating source and opening of the water supply valve when the amount of heat storage is less than a predetermined value until the amount becomes equal to or more than the predetermined value.