JPH0587460U - Unit type water heater - Google Patents

Abstract

(57) [Summary] [Object] To provide a unit type water heater in which a heater and auxiliary devices to be arranged around the heater are compactly arranged and arranged in a casing. [Structure] A heater 15, a circuit for circulating hot water between the heater 15 and an external hot water facility, and a circulation pump 1.
6, a heating circuit 34 for sending return water from an external facility for using hot water to the facility for using hot water via the heater 15, and a non-heating circulation circuit 35 for directly sending the return water to the facility for using hot water without passing through the heater. And, the circuit switching valve 17 for switching between the heating circuit 34 and the non-heating circulation circuit 35 is arranged in advance inside the casing 1 to significantly reduce the number of on-site construction steps.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a unit type water heater.

[0002]

[Prior Art]

 For example, required hot water is appropriately supplied from the water heater to facilities using hot water such as a shower, a hot water tap, a bathtub, a hot water pool, or a hot water heater. Therefore, hot water machines that supply hot water to these hot water equipments are equipped with hot water circulation pumps, hot water pipes, hot water pipe switching valve devices and auxiliary devices such as their control devices around the heater. It is necessary to provide them with heat insulation.

[0003]

[Problems to be solved by the device]

 However, in the past, when installing a water heater, the attachment of these incidental equipment was done after the heater was installed on the site, so the number of construction man-hours at the site was large and the work efficiency was not good. It was Therefore, the present invention has been made by paying attention to the above-mentioned conventional problems, and a unit type water heater in which a heater and auxiliary devices to be arranged around the heater are compactly arranged and arranged in a casing. The purpose of this is to enable assembly at the factory and solve the above problems.

[0004]

[Means for Solving the Problems]

 The unit type water heater of the present invention has a heater, a circuit for circulating hot water between the heater and an external hot water use facility, a circulation pump, and return water from the external hot water use facility via the heater. Inside the casing, there is a heating circuit that sends out to the facility using hot water, a non-heating circulation circuit that sends the return water directly to the facility using hot water without passing through the heater, and a circuit switching valve that switches between the heating circuit and the non-heating circulation circuit. It will be placed in.

[0005]

[Action]

 Conventionally, the auxiliary equipment around the heater, which was previously installed locally, is unitized and compactly placed inside the casing, so it can be produced in advance in the factory, and it is possible to use external hot water equipment locally. It suffices to connect the pipes, which can significantly reduce the number of on-site construction steps.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. An embodiment of the present invention is shown in FIGS. 1 is a front view of the casing, FIG. 2 is a right side view of the same, FIGS. 3 to 5 are piping diagrams in the casing, FIG. 3 is a front view, FIG. 4 is a plan view, and FIG. 5 is a right side view. Further, FIG. 6 is a flow sheet of a unit type water heater having a hot water supply circuit, a heating circuit, and a circulation circuit. In the figure, 1 is a casing. On the outer surface of the casing 1, a control panel 2 and a remote control panel 3 are provided on the front side, and a connection port 4 for fuel oil piping is provided. In addition to the exhaust gas port 5, a hanging hook 6 is attached to the upper surface. A heating outlet 8, a heating return port 9, a circulating water outlet 10, a circulating water return port 11, a hot water supply outlet 12, and a hot water supply return port 13 are provided on the right side surface.

Inside the casing 1, in addition to a bacotine heater (hereinafter referred to as a heater) 15, as a supplementary equipment, a circulation pump 16, a circuit switching valve 17, a stop valve 18, a safety valve 19, an air vent valve 20, etc. They are arranged and connected by piping. The heater 15 and the circulation pump 16 are fixedly mounted on the floor surface of the casing. Each valve and the pipe are fixed to the casing 1 via a pipe support 25.

A piping circuit for connecting the heater 15 and each device of the above-mentioned auxiliary equipment will be described with reference to the flow chart of FIG. In the case of this embodiment, as the external hot water use equipment, a heater 26, a bathtub or a pool 27, and a hot water supply equipment 28 including a shower 28a, a hot water supply faucet 28b and the like are targeted, and corresponding equipments are provided. A heating circuit 30, a circulation circuit 31, and a hot water supply circuit 32 are formed.

The heating circuit 30 supplies hot water for heating to a heater 26 having a radiator 26 a, a temperature controller 26 b, and a circulation pump 26 c, and returns water from the heater 26 from a heating return port 9. The heating circuit 34 that takes in and heats it through the heater 15 and sends it to the heater 26 from the heating outlet 8 and the return water from the heater 26 that is taken in from the heating return port 9 are directly heated without passing through the heater 15. The casing 1 has an unheated circulation circuit 35 that is sent from the outlet 8 to the heater 26, and a first three-way valve 171 as a circuit switching valve that switches the heating circuit 34 and the unheated circulation circuit 35. It is formed inside. Then, during the installation work of the hot water heater at the site, the heating outlet 8 is connected to a pipe leading to the radiator 26a of the heater 26, which is one of the equipment for using hot water outside, and the heater 26 is circulated to the heating return port 9. The discharge line of the pump 26c is connected. Further, the temperature controller 26b provided inside the heater 26 is connected to the switching operation solenoid 17S of the three-way valve 171 via the control panel 2.

A manual stop valve 18 and a bypass valve 36 are provided around the three-way valve 171 in preparation for replacement of the three-way valve 171, and in the case of a failure of the three-way valve 171, these manual valve Is manually operated so that hot water can be supplied to the heater 26. The circulation circuit 31 supplies hot water to the bathtub or pool 27, takes in the return water from the bathtub or pool 27 from the circulation water return port 11, heats it via the heater 15, and from the circulation water outlet 10 to the bathtub. Alternatively, a heating circuit 37 for sending to the pool 27, a non-heating circulation circuit 38 for directly sending the return water taken in from the circulating water return port 11 to the bath or pool 27 from the circulating water outlet 10 without passing through the heater 15, and a heating circuit. 37 and a second three-way valve 172 as a circuit switching valve that switches between the non-heating circulation circuit 38 and the non-heating circulation circuit 38, and is formed inside the casing 1. Then, during the installation of the local water heater, the circulating water outlet 10 is connected to a pipe leading to a bath or pool 27, which is one of the facilities for using hot water outside, and the circulating water return port 11 circulates the bath or pool 27. The discharge side pipe of the pump 27a is connected. The temperature controller 27b provided in the return pipe of the bath or pool 27 is connected to the switching operation solenoid 17S of the three-way valve 172 via the control panel 2.

A manual stop valve 18 and a bypass valve 36 are provided around the three-way valve 172 in preparation for replacement of the three-way valve 172. In the case of failure of the three-way valve 172, these manual valve Is manually operated so that hot water can be supplied to the heater 26. The hot water supply circuit 32 supplies hot water to the hot water supply equipment 28 including a shower 28a, a hot water supply faucet 28b, a hot water storage tank 28c, and a circulation pump 28d for circulating hot water between the hot water storage tank 28c and the shower 28a, hot water supply faucet 28b. The casing has a heating circulation circuit 39 that takes in the return water from the hot water storage tank 28c from the hot water supply return port 13, sends it to the heater 15 by the circulation pump 16 to heat it, and sends it from the hot water supply outlet 12 to the hot water storage tank 28c again. It is formed inside 1. Then, during the installation work of the local water heater, the pipe to the hot water storage tank 28c of the hot water supply equipment 28 which is an external hot water use equipment is connected to the hot water supply outlet 12, and the hot water return port 13 has a return pipe from the hot water storage tank 28c. Connected. The temperature controller 28e provided in the hot water storage tank 28c is connected to the drive motor of the circulation pump 16 via the control panel 2.

In the flow sheet shown in the figure, a water supply circuit 42 for supplying water from the water supply source 40 to the hot water storage tank 28 c via the water supply tank 41 is provided outside the casing 1, and when hot water is used in the hot water supply facility 28. The water is automatically supplied to the hot water storage tank 28c. A replenishment circuit 43 from the hot water supply equipment 28 to the bath or pool 27 is provided outside the casing 1 with a solenoid valve 44 and a level controller 45, and automatically when the water level of the bath or pool 27 decreases. The solenoid valve 44 is opened so that hot water can be supplied. Further, in the figure, 46 is a drain valve.

Next, the operation will be described. In the unit type water heater of this embodiment, in addition to the heater 15, a heating circuit 30, a circulation circuit 31, and a hot water supply circuit 32 corresponding to an external hot water use facility are arranged in the casing 1 in advance in a factory, and are required at the same time. Electric wiring work and heat insulation work have also been done, and it will be shipped as a compact unit. At the site, after installing the unit water heater of the finished product at a predetermined place, the piping of external equipment may be connected. That is, the heating outlet 8 is connected to the radiator 26a of the heater 26, and the heating return port 9 is connected to the discharge pipe of the circulation pump 26c of the heater. Further, the circulating water outlet 10 is connected to a bath or a pipe to the pool 27, and the circulating water return port 11 is connected to a discharge pipe of a circulation pump 27 a of the bath or the pool 27. Further, the hot water outlet 12 is connected to a pipe to the hot water storage tank 28c of the hot water supply facility 28, and the hot water supply return port 13 is connected to a return pipe from the hot water storage tank 28c.

Therefore, the construction work at the site becomes much easier than the conventional one, and the work efficiency is greatly improved. Operation of the unit water heater is automatic. For example, when the temperature of the heater 26 becomes lower than the set temperature, the solenoid 17S of the three-way valve 171 is activated by a signal from the temperature controller 26b and the valve port communicates with the heating circuit 34. As a result, the return water from the heater 26 is returned to the radiator 26 a of the heater 26 after being heated by the heater 15. On the contrary, when the temperature of the heater 26 is higher than the set temperature, the solenoid 17S of the three-way valve 171 is operated by the signal from the temperature controller 26b, and the valve port communicates with the non-heated circulation circuit 35. As a result, the return water from the heater 26 is returned to the radiator 26a of the heater 26 without passing through the heater 15. In this way, the heater 26 is continuously supplied with hot water controlled to a predetermined temperature.

The hot water supply to the bathtub or pool 27 can be performed in substantially the same manner as the hot water supply to the heater 26. Further, hot water is circulated from the hot water storage tank 28c to the hot water supply equipment 28 by the circulation pump 28d, and when the hot water is consumed, the hot water storage tank 28c is immediately supplied with water via the water supply circuit 42. As a result, when the temperature of the hot water storage tank 28c decreases, the temperature is detected by the temperature controller 28e, and the hot water heated by the heater 15 by the circulation pump 16 is sent to the hot water storage tank 28c and heated.

In the above embodiment, there are the heater 26, the bathtub or the pool 27, and the hot water supply equipment 28 as the external hot water use equipment, and the unit type water heater corresponding to this is described, but the present invention is not limited to this. Needless to say, various types of external equipment can be freely provided in factory production, such as when the external equipment is a bathtub, pool, and hot water supply equipment, or when there are only multiple hot water supply equipment.

[0017]

[Effect of the device]

 As described above, according to the present invention, the heater, the circuit for circulating hot water between the heater and the external hot water use equipment, the circulation pump, and the return water from the external hot water use equipment are supplied to the heater. A heating circuit for sending the hot water to the facility for using hot water, a non-heating circulation circuit for directly sending the return water to the facility for using hot water without passing through the heater, and a circuit switching valve for switching between the heating circuit and the non-heating circulation circuit. Since the inside of the casing is located inside the casing, it is possible to produce the area around the heater, which was previously installed locally, in advance at the factory, and it is possible to significantly reduce the number of construction steps locally.

[Brief description of drawings]

FIG. 1 is an external front view of an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a front view of the internal piping of the one shown in FIG.

FIG. 4 is a plan view of the internal piping of the one shown in FIG.

5 is a side view of the internal piping of the one shown in FIG. 1. FIG.

FIG. 6 is a flow sheet of what is shown in FIG.

[Explanation of symbols]

 1 casing 15 heater 16 circulation pump 17 circuit switching valve (three-way valve) 34 heating circuit 35 non-heating circulation circuit

Claims (1)

[Scope of utility model registration request] 1. A heater, a circuit for circulating hot water between the heater and an external hot water facility, and a circulation pump,
A heating circuit that sends return water from an external facility using hot water to the facility using hot water via the heater, a non-heating circulation circuit that directly sends the return water to the facility using hot water, and the heating circuit. A unit type water heater in which a circuit switching valve for switching between a heating circuit and a non-heating circulation circuit is arranged inside the casing.